benchmark arrays

- https://github.com/ikpil/DotRecast/pull/54

.github/FUNDING.yml

@@ -0,0 +1,3 @@
+# These are supported funding model platforms
+
+github: ikpil

.github/workflows/dotnet.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        dotnet-version: [ '6.x', '7.x', '8.x' ]
+        dotnet-version: [ '6', '7', '8' ]
         os: [ windows-latest, ubuntu-latest, macos-latest ]
 
     steps:
@@ -39,13 +39,13 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: '8.x'
+          dotnet-version: ${{ matrix.dotnet-version }}.x
             
       - name: Restore dependencies
         run: dotnet restore
 
       - name: Build
-        run: dotnet build -c Release --no-restore
+        run: dotnet build -c Release --no-restore --framework net${{ matrix.dotnet-version }}.0
 
       - name: Test
-        run: dotnet test -c Release --no-build --verbosity normal
+        run: dotnet test -c Release --no-build --verbosity normal --framework net${{ matrix.dotnet-version }}.0

BuildingAndIntegrating.md

@@ -0,0 +1,97 @@
+
+## 🔨 Build
+- Building requires only .NET 8 SDK.
+
+### 🔨 Building with Command Prompt
+
+```shell
+dotnet build -c Release
+```
+
+### 🔨 Building with an IDE
+
+1. Open IDE: Launch your C# IDE (e.g., Visual Studio).
+2. Open Solution: Go to the "File" menu and select "Open Solution."
+3. Build: In the IDE menu, select "Build" > "Build Solution" or click the "Build" icon on the toolbar.
+
+## ▶️ Run
+- To verify the run for all modules, run [DotRecast.Recast.Demo](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj)
+- on windows requirement : install to [Microsoft Visual C++ Redistributable Package](https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist) 
+
+### ▶️ Running With Command Prompt
+
+```shell
+dotnet run --project src/DotRecast.Recast.Demo --framework net8.0 -c Release
+```
+
+### ▶️ Running With IDE (ex. Visual Studio 2022 or Rider ...)
+
+1. Open your C# IDE (like Visual Studio).
+2. Go to "File" in the menu.
+3. Choose "Open Project" or "Open Solution."
+4. Find and select [DotRecast.sln](DotRecast.sln), then click "Open."
+5. Run to [DotRecast.Recast.Demo](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj)
+
+## 🧪 Running Unit Test
+
+- [DotRecast.Core.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Core.Test) : ...
+- [DotRecast.Recast.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Recast.Test) : ...
+- [DotRecast.Detour.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Detour.Test) : ...
+- [DotRecast.Detour.TileCache.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Detour.TileCache.Test) : ...
+- [DotRecast.Detour.Crowd.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Detour.Crowd.Test) : ...
+- [DotRecast.Detour.Dynamic.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Detour.Dynamic.Test) : ...
+- [DotRecast.Detour.Extras.Test](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Detour.Extras.Test) : ...
+
+### 🧪 Testing With Command Prompt
+
+```shell
+ dotnet test --framework net8.0 -c Release
+```
+
+### 🧪 Testing With IDE 
+
+- Refer to the manual for your IDE.
+
+## 🛠️ Integration
+
+There are a few ways to integrate [DotRecast.Recast](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast) and [DotRecast.Detour](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour) into your project. 
+Source integration is the most popular and most flexible, and is what the project was designed for from the beginning.
+
+### 🛠️ Source Integration
+
+It is recommended to add the source directories 
+[DotRecast.Core](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Core), 
+[DotRecast.Recast](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast),
+[DotRecast.Detour](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour),
+[DotRecast.Detour.Crowd](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Crowd),
+[DotRecast.Detour.TileCache](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.TileCache) 
+and directly into your project depending on which parts of the project you need. 
+
+For example your level building tool could include
+[DotRecast.Core](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Core),
+[DotRecast.Recast](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast),
+[DotRecast.Detour](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour) 
+and your game runtime could just include
+[DotRecast.Detour](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour)
+
+- [DotRecast.Core](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Core) : Core Utils
+- [DotRecast.Recast](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast) : Core navmesh building system.
+- [DotRecast.Detour](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour) : Runtime navmesh interface and query system.
+- [DotRecast.Detour.TileCache](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.TileCache) : Runtime movement, obstacle avoidance, and crowd simulation systems.
+- [DotRecast.Detour.Crowd](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Crowd) : Runtime navmesh dynamic obstacle and re-baking system.
+- [DotRecast.Detour.Dynamic](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Dynamic) : robust support for dynamic nav meshes combining pre-built voxels with dynamic objects which can be freely added and removed
+- [DotRecast.Detour.Extras](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Extras) : simple tool to import navmeshes created with [A* Pathfinding Project](https://arongranberg.com/astar/)
+
+
+### 🛠️ Installation through Nuget
+
+- Nuget link : [DotRecast.Core](https://www.nuget.org/packages/DotRecast.Core)
+- Nuget link : [DotRecast.Recast](https://www.nuget.org/packages/DotRecast.Recast)
+- Nuget link : [DotRecast.Detour](https://www.nuget.org/packages/DotRecast.Detour)
+- Nuget link : [DotRecast.Detour.TileCache](https://www.nuget.org/packages/DotRecast.Detour.TileCache)
+- Nuget link : [DotRecast.Detour.Crowd](https://www.nuget.org/packages/DotRecast.Detour.Crowd)
+- Nuget link : [DotRecast.Detour.Dynamic](https://www.nuget.org/packages/DotRecast.Detour.Dynamic)
+- Nuget link : [DotRecast.Detour.Extras](https://www.nuget.org/packages/DotRecast.Detour.Extras)
+- Nuget link : [DotRecast.Recast.Toolset](https://www.nuget.org/packages/DotRecast.Recast.Toolset)
+- Nuget link : [DotRecast.Recast.Demo](https://www.nuget.org/packages/DotRecast.Recast.Demo)
+

CHANGELOG.md

@@ -0,0 +1,82 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [Unreleased] - yyyy-mm-dd
+
+### Added
+- Added RcCircularBuffer<T> [@ikpil](https://github.com/ikpil)
+- Added struct DtCrowdScopedTimer to avoid allocations in scoped timer calls. [@wrenge](https://github.com/wrenge)
+- Added struct RcScopedTimer to avoid allocations in RcContext scoped timer [@ikpil](https://github.com/ikpil)
+ 
+### Fixed
+
+### Changed
+- Changed DtPathCorridor.Init(int maxPath) function to allow setting the maximum path [@ikpil](https://github.com/ikpil)
+- Changed from List<T> to RcCyclicBuffer in DtCrowdTelemetry execution timing sampling [@wrenge](https://github.com/wrenge)
+- RcCyclicBuffer<T> optimizations [@wrenge](https://github.com/wrenge)
+
+### Removed
+
+### Special Thanks
+- [@Doprez](https://github.com/Doprez)
+- [@Arctium](https://github.com/Arctium)
+
+
+## [2024.1.3] - 2024-02-13
+
+### Added
+- Added DtNodeQueue UnitTest [@ikpil](https://github.com/ikpil)
+- Added RcSortedQueue UnitTest [@ikpil](https://github.com/ikpil)
+- Added IComparable interface to RcAtomicLong [@ikpil](https://github.com/ikpil)
+- Added Menu bar in Demo [@ikpil](https://github.com/ikpil)
+ 
+### Fixed
+
+### Changed
+- Update Microsoft.NET.Test.Sdk 17.8.0 to 17.9.0
+- Enhanced ToString method of DtNode to provide more detailed information.
+- Reuse DtNode in DtNodePool
+ 
+### Removed
+
+### Special Thanks
+- [@Doprez](https://github.com/Doprez)
+- [@Arctium](https://github.com/Arctium)
+ 
+## [2024.1.2] - 2024-02-04
+
+### Added
+- Added DtNodePool tests [@ikpil](https://github.com/ikpil)
+- Added WangHash() for DtNodePool [@ikpil](https://github.com/ikpil)
+- Added avg, min, max, sampling updated times in CrowdAgentProfilingTool [@ikpil](https://github.com/ikpil)
+ 
+### Fixed
+- Fixed SOH issue in DtNavMeshQuery.Raycast [@ikpil](https://github.com/ikpil)
+- Fixed SOH issue in DtProximityGrid.QueryItems [@ikpil](https://github.com/ikpil)
+
+### Changed
+- Upgrade NUnit.Analyzers 4.0.1
+
+### Removed
+
+### Special Thanks
+- [@Doprez](https://github.com/Doprez)
+- [@Arctium](https://github.com/Arctium)
+
+## [2024.1.1] - 2024-01-05
+
+### Fixed
+- Fix typo ([#25](https://github.com/ikpil/DotRecast/pull/25)) [@c0nd3v](https://github.com/c0nd3v)
+- Fix updated struct version ([#23](https://github.com/ikpil/DotRecast/pull/23)) [@c0nd3v](https://github.com/c0nd3v)
+- Allow Radius 0 in Demo ([#22](https://github.com/ikpil/DotRecast/pull/22)) [@c0nd3v](https://github.com/c0nd3v)
+
+### Changed
+- [Upstream] Cleanup filter code and improved documentation ([#30](https://github.com/ikpil/DotRecast/pull/30)) [@ikpil](https://github.com/ikpil)
+- [Upstream] Make detail mesh edge detection more robust ([#26](https://github.com/ikpil/DotRecast/pull/26)) [@ikpil](https://github.com/ikpil)
+- [Upstream] 248275e - Fix: typo error (#153) ([#21](https://github.com/ikpil/DotRecast/pull/21)) [@ikpil](https://github.com/ikpil)
+- Code cleanup and small optimizations in RecastFilter.cpp ([#29](https://github.com/ikpil/DotRecast/pull/29)) [@ikpil](https://github.com/ikpil)
+- Added UI scaling feature based on monitor resolution in Demo ([#28](https://github.com/ikpil/DotRecast/pull/28)) [@ikpil](https://github.com/ikpil)
+

README.md

@@ -1,81 +1,94 @@
-[![License: Zlib](https://img.shields.io/badge/License-Zlib-lightgrey.svg)](https://opensource.org/licenses/Zlib)
-[![.NET](https://github.com/ikpil/DotRecast/actions/workflows/dotnet.yml/badge.svg)](https://github.com/ikpil/DotRecast/actions/workflows/dotnet.yml)
-[![CodeQL](https://github.com/ikpil/DotRecast/actions/workflows/codeql.yml/badge.svg?branch=main)](https://github.com/ikpil/DotRecast/actions/workflows/codeql.yml)
-[![NuGet Version and Downloads count](https://buildstats.info/nuget/DotRecast.Core)](https://www.nuget.org/packages/DotRecast.Core)
-![Repo Size](https://img.shields.io/github/repo-size/ikpil/DotRecast.svg?colorB=lightgray)
-![Languages](https://img.shields.io/github/languages/top/ikpil/DotRecast)
-[![Visitors](https://api.visitorbadge.io/api/daily?path=https%3A%2F%2Fgithub.com%2Fikpil%2FDotRecast&countColor=%23263759&style=flat-square)](https://visitorbadge.io/status?path=https%3A%2F%2Fgithub.com%2Fikpil%2FDotRecast)
+<h1 align="center">DotRecast</h1>
+<p align="center">
+<i>DotRecast is C# Recast & Detour, a port of <a href="https://github.com/recastnavigation/recastnavigation">recastnavigation</a> and <a href="https://github.com/ppiastucki/recast4j">recast4j</a> to the C# language.</i>
+</p>
+<p align="center">
+<i>If you'd like to support the project, we'd appreciate starring(⭐) our repos on Github for more visibility.</i>
+</p>
 
-# Screenshot
-![screenshot](https://github.com/ikpil/DotRecast/assets/313821/8cf67832-1206-4b58-8c1f-7205210cbf22)
+---
 
-# Introduction
-1. DotRecast is a port of C++'s [recastnavigation](https://github.com/recastnavigation/recastnavigation) and Java's [recast4j](https://github.com/ppiastucki/recast4j) to the C# language.
-2. For game development, C# servers, C# project, and Unity3D are supported.
-3. DotRecast consists of Recast and Detour, Crowd, Dynamic, Extras, TileCache, DemoTool, Demo
+<p align="center">
+<img alt="![GitHub License]" src="https://img.shields.io/github/license/ikpil/DotRecast?style=for-the-badge">
+<img alt="Languages" src="https://img.shields.io/github/languages/top/ikpil/DotRecast?style=for-the-badge">
+<img alt="GitHub repo size" src="https://img.shields.io/github/repo-size/ikpil/DotRecast?style=for-the-badge">
+<a href="https://github.com/ikpil/DotRecast"><img alt="GitHub Repo stars" src="https://img.shields.io/github/stars/ikpil/DotRecast?style=for-the-badge&logo=github"></a>
+<a href="https://github.com/ikpil/DotRecast/actions/workflows/dotnet.yml"><img alt="GitHub Actions Workflow Status" src="https://img.shields.io/github/actions/workflow/status/ikpil/DotRecast/dotnet.yml?style=for-the-badge&logo=github"></a>
+<a href="https://github.com/ikpil/DotRecast/actions/workflows/codeql.yml"><img alt="GitHub Actions Workflow Status" src="https://img.shields.io/github/actions/workflow/status/ikpil/DotRecast/codeql.yml?style=for-the-badge&logo=github&label=CODEQL"></a>
+<a href="https://github.com/ikpil/DotRecast/commits"><img alt="GitHub commit activity" src="https://img.shields.io/github/commit-activity/m/ikpil/DotRecast?style=for-the-badge&logo=github"></a>
+<a href="https://github.com/ikpil/DotRecast/issues"><img alt="GitHub issues" src="https://img.shields.io/github/issues-raw/ikpil/DotRecast?style=for-the-badge&logo=github&color=44cc11"></a>
+<a href="https://github.com/ikpil/DotRecast/issues"><img alt="GitHub closed issues" src="https://img.shields.io/github/issues-closed-raw/ikpil/DotRecast?style=for-the-badge&logo=github&color=a371f7"></a>
+<a href="https://www.nuget.org/packages/DotRecast.Core"><img alt="NuGet Version" src="https://img.shields.io/nuget/vpre/DotRecast.Core?style=for-the-badge&logo=nuget"></a>
+<a href="https://www.nuget.org/packages/DotRecast.Core"><img alt="NuGet Downloads" src="https://img.shields.io/nuget/dt/DotRecast.Core?style=for-the-badge&logo=nuget"></a>
+<a href="https://visitorbadge.io/status?path=ikpil%2FDotRecast"><img alt="Visitors" src="https://api.visitorbadge.io/api/daily?path=ikpil%2FDotRecast&countColor=%23263759"></a>
+<a href="https://github.com/sponsors/ikpil"><img alt="GitHub Sponsors" src="https://img.shields.io/github/sponsors/ikpil?style=for-the-badge&logo=GitHub-Sponsors&link=https%3A%2F%2Fgithub.com%2Fsponsors%2Fikpil"></a>
+</p>
 
-https://user-images.githubusercontent.com/313821/266782992-32a72a43-8f02-4214-8f1e-86b06952c8b7.mp4
+---
 
-## DotRecast.Recast
+[![demo](https://user-images.githubusercontent.com/313821/266750582-8cf67832-1206-4b58-8c1f-7205210cbf22.gif)](https://youtu.be/zIFIgziKLhQ)
 
-Recast is state of the art navigation mesh construction toolset for games.
 
-Recast is...
-* 🤖 **Automatic** - throw any level geometry at it and you will get a robust navmesh out
-* 🏎️ **Fast** - swift turnaround times for level designers
-* 🧘 **Flexible** - easily customize the navmesh generation and runtime navigation systems to suit your specific game's needs.
 
-Recast constructs a navmesh through a multi-step rasterization process:
+## 🚀 Features
  
-1. First Recast voxelizes the input triangle mesh by rasterizing the triangles into a multi-layer heightfield.
-2. Voxels in areas where the character would not be able to move are removed by applying simple voxel data filters.
-3. The walkable areas described by the voxel grid are then divided into sets of 2D polygonal regions.
-4. The navigation polygons are generated by triangulating and stitching together the generated 2d polygonal regions.
+- 🤖 Automatic - Recast can generate a navmesh from any level geometry you throw at it
+- 🏎️ Fast - swift turnaround times for level designers
+- 🧘 Flexible - detailed customization options and modular design let you tailor functionality to your specific needs
+- 🚫 Dependency-Free - building Recast & Detour only requires a .NET compiler
+- 💪 Industry Standard - Recast powers AI navigation features in Unity, Unreal, Godot, O3DE and countless AAA and indie games and engines
 
-## DotRecast.Detour
+Recast Navigation is divided into multiple modules, each contained in its own folder:
 
-Recast is accompanied by Detour, a path-finding and spatial reasoning toolkit. You can use any navigation mesh with Detour, but of course the data generated with Recast fits perfectly.
+- [DotRecast.Core](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Core) : Core utils
+- [DotRecast.Recast](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast) : Navmesh generation
+- [DotRecast.Detour](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour) : Runtime loading of navmesh data, pathfinding, navmesh queries
+- [DotRecast.Detour.TileCache](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.TileCache) : Navmesh streaming. Useful for large levels and open-world games
+- [DotRecast.Detour.Crowd](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Crowd) : Agent movement, collision avoidance, and crowd simulation
+- [DotRecast.Detour.Dynamic](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Dynamic) : robust support for dynamic nav meshes combining pre-built voxels with dynamic objects which can be freely added and removed
+- [DotRecast.Detour.Extras](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Detour.Extras) : simple tool to import navmeshes created with [A* Pathfinding Project](https://arongranberg.com/astar/)
+- [DotRecast.Recast.Toolset](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast.Toolset) : all modules
+- [DotRecast.Recast.Demo](https://github.com/ikpil/DotRecast/tree/main/src/DotRecast.Recast.Demo) : Standalone, comprehensive demo app showcasing all aspects of Recast & Detour's functionality
+- [Tests](https://github.com/ikpil/DotRecast/tree/main/test) : Unit tests
 
-Detour offers a simple static navmesh data representation which is suitable for many simple cases.  It also provides a tiled navigation mesh representation, which allows you to stream of navigation data in and out as the player progresses through the world and regenerate sections of the navmesh data as the world changes.
+## ⚡ Getting Started
  
-## DotRecast.Recast.Demo
+- To build or integrate into your own project, please check out [BuildingAndIntegrating.md](https://github.com/ikpil/DotRecast/tree/main/BuildingAndIntegrating.md)
+- To create a NavMesh, please check out [RecastSoloMeshTest.cs](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Recast.Test/RecastSoloMeshTest.cs)
+- To test pathfinding, please check out [FindPathTest.cs](https://github.com/ikpil/DotRecast/tree/main/test/DotRecast.Detour.Test/FindPathTest.cs)
+- To watch the demo play video, please check out [Demo Video](#-demo-video)
 
-You can find a comprehensive demo project in the `DotRecast.Recast.Demo` folder. It's a kitchen sink demo showcasing all the functionality of the library. If you are new to Recast & Detour, check out [SoloNavMeshBuilder.cs](/src/DotRecast.Recast.Demo/Builder/SoloNavMeshBuilder.cs) to get started with building navmeshes and [TestNavmeshTool.cs](/src/DotRecast.Recast.Demo/Tools/TestNavmeshTool.cs) to see how Detour can be used to find paths.
+## ⚙ How it Works
 
-### Building DotRecast.Recast.Demo
+Recast constructs a navmesh through a multi-step mesh rasterization process.
 
-1. `DotRecast.Recast.Demo` uses [dotnet 8](https://dotnet.microsoft.com/) to build platform specific projects. Download it and make sure it's available on your path, or specify the path to it.
-2. Open a command prompt, point it to a directory and clone DotRecast to it: `git clone https://github.com/ikpil/DotRecast.git`
-3. Open `<DotRecastDir>\DotRecast.sln` with Visual Studio 2022 and build `DotRecast.Recast.Demo`
-   - Optionally, you can run using the `dotnet run` command with `DotRecast.Recast.Demo.csproj`
+1. First Recast rasterizes the input triangle meshes into voxels.
+2. Voxels in areas where agents would not be able to move are filtered and removed.
+3. The walkable areas described by the voxel grid are then divided into sets of polygonal regions.
+4. The navigation polygons are generated by re-triangulating the generated polygonal regions into a navmesh.
 
-#### Windows
+You can use Recast to build a single navmesh, or a tiled navmesh.
+Single meshes are suitable for many simple, static cases and are easy to work with.
+Tiled navmeshes are more complex to work with but better support larger, more dynamic environments.  Tiled meshes enable advance Detour features like re-baking, heirarchical path-planning, and navmesh data-streaming.
 
-- need to install [microsoft visual c++ redistributable package](https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist)
+## 📚 Documentation & Links
 
-#### Linux & macOS & Windows
+- DotRecast Links
+  - [DotRecast/issues](https://github.com/ikpil/DotRecast/issues)
  
-- Navigate to the `DotRecast.Recast.Demo` folder and run `dotnet run`
+- Official Links
+  - [recastnavigation/discussions](https://github.com/recastnavigation/recastnavigation/discussions)
+  - [recastnav.com](https://recastnav.com)
 
-### Running Unit tests
+## 🅾 License
 
-#### With VS2022
+DotRecast is licensed under ZLib license, see [LICENSE.txt](https://github.com/ikpil/DotRecast/tree/main/LICENSE.txt) for more information.
 
-- In Visual Studio 2022 go to the test menu and press `Run All Tests` 
+## 📹 Demo Video
 
-#### With CLI
+[![demo](https://img.youtube.com/vi/zIFIgziKLhQ/0.jpg)](https://youtu.be/zIFIgziKLhQ)
 
-- in the DotRecast folder open a command prompt and run `dotnet test`
+[![demo](https://img.youtube.com/vi/CPvc19gNUEk/0.jpg)](https://youtu.be/CPvc19gNUEk)
 
-## Integrating with your game or engine
+[![demo](https://img.youtube.com/vi/pe5jpGUNPRg/0.jpg)](https://youtu.be/pe5jpGUNPRg)
 
-It is recommended to add the source directories `DotRecast.Core`, `DotRecast.Detour.Crowd`, `DotRecast.Detour.Dynamic`, `DotRecast.Detour.TitleCache`, `DotRecast.Detour.Extras` and `DotRecast.Recast` into your own project depending on which parts of the project you need. For example your level building tool could include `DotRecast.Core`, `DotRecast.Recast`, and `DotRecast.Detour`, and your game runtime could just include `DotRecast.Detour`.
-
-## Discuss
-
-- Discuss Recast & Detour: http://groups.google.com/group/recastnavigation
-- Development blog: http://digestingduck.blogspot.com/
-
-## License
-
-DotRecast is licensed under ZLib license, see [LICENSE.txt](LICENSE.txt) for more information.

src/DotRecast.Core/Buffers/RcCyclicBuffer.cs

@@ -0,0 +1,274 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Net.Security;
+
+namespace DotRecast.Core.Buffers
+{
+    // https://github.com/joaoportela/CircularBuffer-CSharp/blob/master/CircularBuffer/CircularBuffer.cs
+    public class RcCyclicBuffer<T> : IEnumerable<T>
+    {
+        public struct Enumerator : IEnumerator<T>
+        {
+            private readonly RcCyclicBuffer<T> _cb;
+            private int _index;
+            private readonly int _size;
+
+            internal Enumerator(RcCyclicBuffer<T> cb)
+            {
+                _cb = cb;
+                _size = _cb._size;
+                _index = default;
+                Reset();
+            }
+            
+            public bool MoveNext()
+            {
+                return ++_index < _size;
+            }
+
+            public void Reset()
+            {
+                _index = -1;
+            }
+
+            public T Current => _cb[_index];
+
+            object IEnumerator.Current => Current;
+
+            public void Dispose()
+            {
+                // This could be used to unlock write access to collection
+            }
+        }
+        
+        private readonly T[] _buffer;
+
+        private int _start;
+        private int _end;
+        private int _size;
+
+        public RcCyclicBuffer(int capacity)
+            : this(capacity, new T[] { })
+        {
+        }
+
+        public RcCyclicBuffer(int capacity, T[] items)
+        {
+            if (capacity < 1)
+            {
+                throw new ArgumentException("RcCyclicBuffer cannot have negative or zero capacity.", nameof(capacity));
+            }
+
+            if (items == null)
+            {
+                throw new ArgumentNullException(nameof(items));
+            }
+
+            if (items.Length > capacity)
+            {
+                throw new ArgumentException("Too many items to fit RcCyclicBuffer", nameof(items));
+            }
+
+            _buffer = new T[capacity];
+
+            Array.Copy(items, _buffer, items.Length);
+            _size = items.Length;
+
+            _start = 0;
+            _end = _size == capacity ? 0 : _size;
+        }
+
+        public int Capacity => _buffer.Length;
+        public bool IsFull => Size == Capacity;
+        public bool IsEmpty => Size == 0;
+
+        public int Size => _size;
+
+        public T Front()
+        {
+            ThrowIfEmpty();
+            return _buffer[_start];
+        }
+
+        public T Back()
+        {
+            ThrowIfEmpty();
+            return _buffer[(_end != 0 ? _end : Capacity) - 1];
+        }
+
+        public T this[int index]
+        {
+            get
+            {
+                if (IsEmpty)
+                {
+                    throw new IndexOutOfRangeException($"Cannot access index {index}. Buffer is empty");
+                }
+
+                if (index >= _size)
+                {
+                    throw new IndexOutOfRangeException($"Cannot access index {index}. Buffer size is {_size}");
+                }
+
+                int actualIndex = InternalIndex(index);
+                return _buffer[actualIndex];
+            }
+            set
+            {
+                if (IsEmpty)
+                {
+                    throw new IndexOutOfRangeException($"Cannot access index {index}. Buffer is empty");
+                }
+
+                if (index >= _size)
+                {
+                    throw new IndexOutOfRangeException($"Cannot access index {index}. Buffer size is {_size}");
+                }
+
+                int actualIndex = InternalIndex(index);
+                _buffer[actualIndex] = value;
+            }
+        }
+
+        public void PushBack(T item)
+        {
+            if (IsFull)
+            {
+                _buffer[_end] = item;
+                Increment(ref _end);
+                _start = _end;
+            }
+            else
+            {
+                _buffer[_end] = item;
+                Increment(ref _end);
+                ++_size;
+            }
+        }
+
+        public void PushFront(T item)
+        {
+            if (IsFull)
+            {
+                Decrement(ref _start);
+                _end = _start;
+                _buffer[_start] = item;
+            }
+            else
+            {
+                Decrement(ref _start);
+                _buffer[_start] = item;
+                ++_size;
+            }
+        }
+
+        public void PopBack()
+        {
+            ThrowIfEmpty("Cannot take elements from an empty buffer.");
+            Decrement(ref _end);
+            _buffer[_end] = default(T);
+            --_size;
+        }
+
+        public void PopFront()
+        {
+            ThrowIfEmpty("Cannot take elements from an empty buffer.");
+            _buffer[_start] = default(T);
+            Increment(ref _start);
+            --_size;
+        }
+
+        public void Clear()
+        {
+            // to clear we just reset everything.
+            _start = 0;
+            _end = 0;
+            _size = 0;
+            Array.Clear(_buffer, 0, _buffer.Length);
+        }
+
+        public T[] ToArray()
+        {
+            T[] newArray = new T[Size];
+            CopyTo(newArray);
+            return newArray;
+        }
+
+        public void CopyTo(Span<T> destination)
+        {
+            var span1 = ArrayOne();
+            span1.CopyTo(destination);
+            ArrayTwo().CopyTo(destination[span1.Length..]);
+        }
+
+        private void ThrowIfEmpty(string message = "Cannot access an empty buffer.")
+        {
+            if (IsEmpty)
+            {
+                throw new InvalidOperationException(message);
+            }
+        }
+
+        private void Increment(ref int index)
+        {
+            if (++index == Capacity)
+            {
+                index = 0;
+            }
+        }
+
+        private void Decrement(ref int index)
+        {
+            if (index == 0)
+            {
+                index = Capacity;
+            }
+
+            index--;
+        }
+
+        private int InternalIndex(int index)
+        {
+            return _start + (index < (Capacity - _start)
+                ? index
+                : index - Capacity);
+        }
+
+        internal Span<T> ArrayOne()
+        {
+            if (IsEmpty)
+            {
+                return new Span<T>(Array.Empty<T>());
+            }
+
+            if (_start < _end)
+            {
+                return new Span<T>(_buffer, _start, _end - _start);
+            }
+
+            return new Span<T>(_buffer, _start, _buffer.Length - _start);
+        }
+
+        internal Span<T> ArrayTwo()
+        {
+            if (IsEmpty)
+            {
+                return new Span<T>(Array.Empty<T>());
+            }
+
+            if (_start < _end)
+            {
+                return new Span<T>(_buffer, _end, 0);
+            }
+
+            return new Span<T>(_buffer, 0, _end);
+        }
+
+        public Enumerator GetEnumerator() => new Enumerator(this);
+        
+        IEnumerator<T> IEnumerable<T>.GetEnumerator() => GetEnumerator();
+        
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+}

src/DotRecast.Core/Buffers/RcCyclicBuffers.cs

@@ -0,0 +1,119 @@
+using System;
+using System.Numerics;
+using System.Runtime.InteropServices;
+
+namespace DotRecast.Core.Buffers
+{
+    public static class RcCyclicBuffers
+    {
+        public static long Sum(this ReadOnlySpan<long> source)
+        {
+            var buffer = source;
+            var result = 0L;
+            if (Vector.IsHardwareAccelerated)
+            {
+                var vectors = MemoryMarshal.Cast<long, Vector<long>>(buffer);
+                var vecSum = Vector<long>.Zero;
+                foreach (var vec in vectors)
+                    vecSum += vec;
+
+                result = Vector.Dot(vecSum, Vector<long>.One);
+                var remainder = source.Length % Vector<long>.Count;
+                buffer = buffer[^remainder..];
+            }
+            
+            foreach (var val in buffer)
+                result += val;
+            
+            return result;
+        }
+
+        public static double Average(this ReadOnlySpan<long> source)
+        {
+            if (0 >= source.Length)
+                return 0;
+
+            return source.Sum() / (double)source.Length;
+        }
+        
+        private static long Min(this ReadOnlySpan<long> source)
+        {
+            var buffer = source;
+            var result = long.MaxValue;
+            
+            if (Vector.IsHardwareAccelerated)
+            {
+                var vectors = MemoryMarshal.Cast<long, Vector<long>>(buffer);
+                var vecMin = Vector<long>.One * result;
+                
+                foreach (var vec in vectors)
+                    vecMin = Vector.Min(vecMin, vec);
+
+                for (int i = 0; i < Vector<long>.Count; i++)
+                    result = Math.Min(result, vecMin[i]);
+                
+                var remainder = source.Length % Vector<long>.Count;
+                buffer = buffer[^remainder..];
+            }
+            
+            foreach (var val in buffer)
+                result = Math.Min(result, val);
+
+            return result;
+        }
+        
+        private static long Max(this ReadOnlySpan<long> source)
+        {
+            var buffer = source;
+            var result = long.MinValue;
+            
+            if (Vector.IsHardwareAccelerated)
+            {
+                var vectors = MemoryMarshal.Cast<long, Vector<long>>(buffer);
+                var vecMax = Vector<long>.One * result;
+                
+                foreach (var vec in vectors)
+                    vecMax = Vector.Max(vecMax, vec);
+
+                for (int i = 0; i < Vector<long>.Count; i++)
+                    result = Math.Max(result, vecMax[i]);
+                
+                var remainder = source.Length % Vector<long>.Count;
+                buffer = buffer[^remainder..];
+            }
+            
+            foreach (var val in buffer)
+                result = Math.Max(result, val);
+
+            return result;
+        }
+
+        public static long Sum(this RcCyclicBuffer<long> source)
+        {
+            return Sum(source.ArrayOne()) + Sum(source.ArrayTwo());
+        }
+
+        public static double Average(this RcCyclicBuffer<long> source)
+        {
+            return Sum(source) / (double)source.Size;
+        }
+
+        public static long Min(this RcCyclicBuffer<long> source)
+        {
+            var firstHalf = source.ArrayOne();
+            var secondHalf = source.ArrayTwo();
+            var a = firstHalf.Length > 0 ? Min(firstHalf) : long.MaxValue;
+            var b = secondHalf.Length > 0 ? Min(secondHalf) : long.MaxValue;
+            return Math.Min(a, b);
+        }
+
+        public static long Max(this RcCyclicBuffer<long> source)
+        {
+            var firstHalf = source.ArrayOne();
+            var secondHalf = source.ArrayTwo();
+            var a = firstHalf.Length > 0 ? Max(firstHalf) : long.MinValue;
+            var b = secondHalf.Length > 0 ? Max(secondHalf) : long.MinValue;
+            return Math.Max(a, b);
+        }
+    }
+}

src/DotRecast.Core/Buffers/RcRentedArray.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Buffers;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Buffers
+{
+    public static class RcRentedArray
+    {
+        public static RcRentedArray<T> Rent<T>(int minimumLength)
+        {
+            var array = ArrayPool<T>.Shared.Rent(minimumLength);
+            return new RcRentedArray<T>(ArrayPool<T>.Shared, array, minimumLength);
+        }
+    }
+
+    public class RcRentedArray<T> : IDisposable
+    {
+        private ArrayPool<T> _owner;
+        private T[] _array;
+
+        public int Length { get; }
+        public bool IsDisposed => null == _owner || null == _array;
+
+        internal RcRentedArray(ArrayPool<T> owner, T[] array, int length)
+        {
+            _owner = owner;
+            _array = array;
+            Length = length;
+        }
+
+        public ref T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+                return ref _array[index];
+            }
+        }
+
+        public T[] AsArray()
+        {
+            return _array;
+        }
+
+
+        public void Dispose()
+        {
+            if (null != _owner && null != _array)
+            {
+                _owner.Return(_array, true);
+                _owner = null;
+                _array = null;
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcSortedQueue.cs

@@ -27,12 +27,12 @@ namespace DotRecast.Core.Collections
     {
         private bool _dirty;
         private readonly List<T> _items;
-        private readonly Comparison<T> _comparison;
+        private readonly Comparer<T> _comparer;
 
-        public RcSortedQueue(Comparison<T> comparison)
+        public RcSortedQueue(Comparison<T> comp)
         {
             _items = new List<T>();
-            _comparison = (x, y) => comparison.Invoke(x, y) * -1; // reverse
+            _comparer = Comparer<T>.Create((x, y) => comp.Invoke(x, y) * -1);
         }
 
         public int Count()
@@ -40,16 +40,22 @@ namespace DotRecast.Core.Collections
             return _items.Count;
         }
 
+        public bool IsEmpty()
+        {
+            return 0 == _items.Count;
+        }
+
         public void Clear()
         {
             _items.Clear();
+            _dirty = false;
         }
 
         private void Balance()
         {
             if (_dirty)
             {
-                _items.Sort(_comparison); // reverse
+                _items.Sort(_comparer); // reverse
                 _dirty = false;
             }
         }
@@ -57,35 +63,39 @@ namespace DotRecast.Core.Collections
         public T Peek()
         {
             Balance();
-            return _items[_items.Count - 1];
+            return _items[^1];
         }
 
         public T Dequeue()
         {
             var node = Peek();
-            _items.Remove(node);
+            _items.RemoveAt(_items.Count - 1);
             return node;
         }
 
         public void Enqueue(T item)
         {
+            if (null == item)
+                return;
+
             _items.Add(item);
             _dirty = true;
         }
 
-        public void Remove(T item)
+        public bool Remove(T item)
         {
+            if (null == item)
+                return false;
+
+            //int idx = _items.BinarySearch(item, _comparer); // don't use this! Because reference types can be reused externally.
             int idx = _items.FindLastIndex(x => item.Equals(x));
             if (0 > idx)
-                return;
+                return false;
 
             _items.RemoveAt(idx);
+            return true;
         }
 
-        public bool IsEmpty()
-        {
-            return 0 == _items.Count;
-        }
 
         public List<T> ToList()
         {

src/DotRecast.Core/Collections/RcStackArray128.cs

@@ -0,0 +1,421 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray128<T>
+    {
+        public static RcStackArray128<T> Empty => new RcStackArray128<T>();
+
+        private const int Size = 128;
+        public int Length => Size;
+        
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+        public T V4;
+        public T V5;
+        public T V6;
+        public T V7;
+        public T V8;
+        public T V9;
+        public T V10;
+        public T V11;
+        public T V12;
+        public T V13;
+        public T V14;
+        public T V15;
+        public T V16;
+        public T V17;
+        public T V18;
+        public T V19;
+        public T V20;
+        public T V21;
+        public T V22;
+        public T V23;
+        public T V24;
+        public T V25;
+        public T V26;
+        public T V27;
+        public T V28;
+        public T V29;
+        public T V30;
+        public T V31;
+        public T V32;
+        public T V33;
+        public T V34;
+        public T V35;
+        public T V36;
+        public T V37;
+        public T V38;
+        public T V39;
+        public T V40;
+        public T V41;
+        public T V42;
+        public T V43;
+        public T V44;
+        public T V45;
+        public T V46;
+        public T V47;
+        public T V48;
+        public T V49;
+        public T V50;
+        public T V51;
+        public T V52;
+        public T V53;
+        public T V54;
+        public T V55;
+        public T V56;
+        public T V57;
+        public T V58;
+        public T V59;
+        public T V60;
+        public T V61;
+        public T V62;
+        public T V63;
+        public T V64;
+        public T V65;
+        public T V66;
+        public T V67;
+        public T V68;
+        public T V69;
+        public T V70;
+        public T V71;
+        public T V72;
+        public T V73;
+        public T V74;
+        public T V75;
+        public T V76;
+        public T V77;
+        public T V78;
+        public T V79;
+        public T V80;
+        public T V81;
+        public T V82;
+        public T V83;
+        public T V84;
+        public T V85;
+        public T V86;
+        public T V87;
+        public T V88;
+        public T V89;
+        public T V90;
+        public T V91;
+        public T V92;
+        public T V93;
+        public T V94;
+        public T V95;
+        public T V96;
+        public T V97;
+        public T V98;
+        public T V99;
+        public T V100;
+        public T V101;
+        public T V102;
+        public T V103;
+        public T V104;
+        public T V105;
+        public T V106;
+        public T V107;
+        public T V108;
+        public T V109;
+        public T V110;
+        public T V111;
+        public T V112;
+        public T V113;
+        public T V114;
+        public T V115;
+        public T V116;
+        public T V117;
+        public T V118;
+        public T V119;
+        public T V120;
+        public T V121;
+        public T V122;
+        public T V123;
+        public T V124;
+        public T V125;
+        public T V126;
+        public T V127;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    4 => V4,
+                    5 => V5,
+                    6 => V6,
+                    7 => V7,
+                    8 => V8,
+                    9 => V9,
+                    10 => V10,
+                    11 => V11,
+                    12 => V12,
+                    13 => V13,
+                    14 => V14,
+                    15 => V15,
+                    16 => V16,
+                    17 => V17,
+                    18 => V18,
+                    19 => V19,
+                    20 => V20,
+                    21 => V21,
+                    22 => V22,
+                    23 => V23,
+                    24 => V24,
+                    25 => V25,
+                    26 => V26,
+                    27 => V27,
+                    28 => V28,
+                    29 => V29,
+                    30 => V30,
+                    31 => V31,
+                    32 => V32,
+                    33 => V33,
+                    34 => V34,
+                    35 => V35,
+                    36 => V36,
+                    37 => V37,
+                    38 => V38,
+                    39 => V39,
+                    40 => V40,
+                    41 => V41,
+                    42 => V42,
+                    43 => V43,
+                    44 => V44,
+                    45 => V45,
+                    46 => V46,
+                    47 => V47,
+                    48 => V48,
+                    49 => V49,
+                    50 => V50,
+                    51 => V51,
+                    52 => V52,
+                    53 => V53,
+                    54 => V54,
+                    55 => V55,
+                    56 => V56,
+                    57 => V57,
+                    58 => V58,
+                    59 => V59,
+                    60 => V60,
+                    61 => V61,
+                    62 => V62,
+                    63 => V63,
+                    64 => V64,
+                    65 => V65,
+                    66 => V66,
+                    67 => V67,
+                    68 => V68,
+                    69 => V69,
+                    70 => V70,
+                    71 => V71,
+                    72 => V72,
+                    73 => V73,
+                    74 => V74,
+                    75 => V75,
+                    76 => V76,
+                    77 => V77,
+                    78 => V78,
+                    79 => V79,
+                    80 => V80,
+                    81 => V81,
+                    82 => V82,
+                    83 => V83,
+                    84 => V84,
+                    85 => V85,
+                    86 => V86,
+                    87 => V87,
+                    88 => V88,
+                    89 => V89,
+                    90 => V90,
+                    91 => V91,
+                    92 => V92,
+                    93 => V93,
+                    94 => V94,
+                    95 => V95,
+                    96 => V96,
+                    97 => V97,
+                    98 => V98,
+                    99 => V99,
+                    100 => V100,
+                    101 => V101,
+                    102 => V102,
+                    103 => V103,
+                    104 => V104,
+                    105 => V105,
+                    106 => V106,
+                    107 => V107,
+                    108 => V108,
+                    109 => V109,
+                    110 => V110,
+                    111 => V111,
+                    112 => V112,
+                    113 => V113,
+                    114 => V114,
+                    115 => V115,
+                    116 => V116,
+                    117 => V117,
+                    118 => V118,
+                    119 => V119,
+                    120 => V120,
+                    121 => V121,
+                    122 => V122,
+                    123 => V123,
+                    124 => V124,
+                    125 => V125,
+                    126 => V126,
+                    127 => V127,
+                    _ => throw new ArgumentOutOfRangeException(nameof(index), index, null)
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                    case 4: V4 = value; break;
+                    case 5: V5 = value; break;
+                    case 6: V6 = value; break;
+                    case 7: V7 = value; break;
+                    case 8: V8 = value; break;
+                    case 9: V9 = value; break;
+                    case 10: V10 = value; break;
+                    case 11: V11 = value; break;
+                    case 12: V12 = value; break;
+                    case 13: V13 = value; break;
+                    case 14: V14 = value; break;
+                    case 15: V15 = value; break;
+                    case 16: V16 = value; break;
+                    case 17: V17 = value; break;
+                    case 18: V18 = value; break;
+                    case 19: V19 = value; break;
+                    case 20: V20 = value; break;
+                    case 21: V21 = value; break;
+                    case 22: V22 = value; break;
+                    case 23: V23 = value; break;
+                    case 24: V24 = value; break;
+                    case 25: V25 = value; break;
+                    case 26: V26 = value; break;
+                    case 27: V27 = value; break;
+                    case 28: V28 = value; break;
+                    case 29: V29 = value; break;
+                    case 30: V30 = value; break;
+                    case 31: V31 = value; break;
+                    case 32 : V32 = value; break;
+                    case 33 : V33 = value; break;
+                    case 34 : V34 = value; break;
+                    case 35 : V35 = value; break;
+                    case 36 : V36 = value; break;
+                    case 37 : V37 = value; break;
+                    case 38 : V38 = value; break;
+                    case 39 : V39 = value; break;
+                    case 40 : V40 = value; break;
+                    case 41 : V41 = value; break;
+                    case 42 : V42 = value; break;
+                    case 43 : V43 = value; break;
+                    case 44 : V44 = value; break;
+                    case 45 : V45 = value; break;
+                    case 46 : V46 = value; break;
+                    case 47 : V47 = value; break;
+                    case 48 : V48 = value; break;
+                    case 49 : V49 = value; break;
+                    case 50 : V50 = value; break;
+                    case 51 : V51 = value; break;
+                    case 52 : V52 = value; break;
+                    case 53 : V53 = value; break;
+                    case 54 : V54 = value; break;
+                    case 55 : V55 = value; break;
+                    case 56 : V56 = value; break;
+                    case 57 : V57 = value; break;
+                    case 58 : V58 = value; break;
+                    case 59 : V59 = value; break;
+                    case 60 : V60 = value; break;
+                    case 61 : V61 = value; break;
+                    case 62 : V62 = value; break;
+                    case 63 : V63 = value; break;
+                    case 64 : V64 = value; break;
+                    case 65 : V65 = value; break;
+                    case 66 : V66 = value; break;
+                    case 67 : V67 = value; break;
+                    case 68 : V68 = value; break;
+                    case 69 : V69 = value; break;
+                    case 70 : V70 = value; break;
+                    case 71 : V71 = value; break;
+                    case 72 : V72 = value; break;
+                    case 73 : V73 = value; break;
+                    case 74 : V74 = value; break;
+                    case 75 : V75 = value; break;
+                    case 76 : V76 = value; break;
+                    case 77 : V77 = value; break;
+                    case 78 : V78 = value; break;
+                    case 79 : V79 = value; break;
+                    case 80 : V80 = value; break;
+                    case 81 : V81 = value; break;
+                    case 82 : V82 = value; break;
+                    case 83 : V83 = value; break;
+                    case 84 : V84 = value; break;
+                    case 85 : V85 = value; break;
+                    case 86 : V86 = value; break;
+                    case 87 : V87 = value; break;
+                    case 88 : V88 = value; break;
+                    case 89 : V89 = value; break;
+                    case 90 : V90 = value; break;
+                    case 91 : V91 = value; break;
+                    case 92 : V92 = value; break;
+                    case 93 : V93 = value; break;
+                    case 94 : V94 = value; break;
+                    case 95 : V95 = value; break;
+                    case 96 : V96 = value; break;
+                    case 97 : V97 = value; break;
+                    case 98 : V98 = value; break;
+                    case 99 : V99 = value; break;
+                    case 100 : V100 = value; break;
+                    case 101 : V101 = value; break;
+                    case 102 : V102 = value; break;
+                    case 103 : V103 = value; break;
+                    case 104 : V104 = value; break;
+                    case 105 : V105 = value; break;
+                    case 106 : V106 = value; break;
+                    case 107 : V107 = value; break;
+                    case 108 : V108 = value; break;
+                    case 109 : V109 = value; break;
+                    case 110 : V110 = value; break;
+                    case 111 : V111 = value; break;
+                    case 112 : V112 = value; break;
+                    case 113 : V113 = value; break;
+                    case 114 : V114 = value; break;
+                    case 115 : V115 = value; break;
+                    case 116 : V116 = value; break;
+                    case 117 : V117 = value; break;
+                    case 118 : V118 = value; break;
+                    case 119 : V119 = value; break;
+                    case 120 : V120 = value; break;
+                    case 121 : V121 = value; break;
+                    case 122 : V122 = value; break;
+                    case 123 : V123 = value; break;
+                    case 124 : V124 = value; break;
+                    case 125 : V125 = value; break;
+                    case 126 : V126 = value; break;
+                    case 127 : V127 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray16.cs

@@ -0,0 +1,85 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray16<T>
+    {
+        public static RcStackArray16<T> Empty => new RcStackArray16<T>();
+
+        private const int Size = 16;
+        public int Length => Size;
+        
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+        public T V4;
+        public T V5;
+        public T V6;
+        public T V7;
+        public T V8;
+        public T V9;
+        public T V10;
+        public T V11;
+        public T V12;
+        public T V13;
+        public T V14;
+        public T V15;
+        
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    4 => V4,
+                    5 => V5,
+                    6 => V6,
+                    7 => V7,
+                    8 => V8,
+                    9 => V9,
+                    10 => V10,
+                    11 => V11,
+                    12 => V12,
+                    13 => V13,
+                    14 => V14,
+                    15 => V15,
+                    _ => throw new IndexOutOfRangeException($"{index}")
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                    case 4: V4 = value; break;
+                    case 5: V5 = value; break;
+                    case 6: V6 = value; break;
+                    case 7: V7 = value; break;
+                    case 8: V8 = value; break;
+                    case 9: V9 = value; break;
+                    case 10: V10 = value; break;
+                    case 11: V11 = value; break;
+                    case 12: V12 = value; break;
+                    case 13: V13 = value; break;
+                    case 14: V14 = value; break;
+                    case 15: V15 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray2.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray2<T>
+    {
+        public static RcStackArray2<T> Empty => new RcStackArray2<T>();
+
+        private const int Size = 2;
+        public int Length => Size;
+
+        public T V0;
+        public T V1;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    _ => throw new IndexOutOfRangeException($"{index}")
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray256.cs

@@ -0,0 +1,805 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray256<T>
+    {
+        public static RcStackArray256<T> Empty => new RcStackArray256<T>();
+
+        private const int Size = 256;
+        public int Length => Size;
+        
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+        public T V4;
+        public T V5;
+        public T V6;
+        public T V7;
+        public T V8;
+        public T V9;
+        public T V10;
+        public T V11;
+        public T V12;
+        public T V13;
+        public T V14;
+        public T V15;
+        public T V16;
+        public T V17;
+        public T V18;
+        public T V19;
+        public T V20;
+        public T V21;
+        public T V22;
+        public T V23;
+        public T V24;
+        public T V25;
+        public T V26;
+        public T V27;
+        public T V28;
+        public T V29;
+        public T V30;
+        public T V31;
+        public T V32;
+        public T V33;
+        public T V34;
+        public T V35;
+        public T V36;
+        public T V37;
+        public T V38;
+        public T V39;
+        public T V40;
+        public T V41;
+        public T V42;
+        public T V43;
+        public T V44;
+        public T V45;
+        public T V46;
+        public T V47;
+        public T V48;
+        public T V49;
+        public T V50;
+        public T V51;
+        public T V52;
+        public T V53;
+        public T V54;
+        public T V55;
+        public T V56;
+        public T V57;
+        public T V58;
+        public T V59;
+        public T V60;
+        public T V61;
+        public T V62;
+        public T V63;
+        public T V64;
+        public T V65;
+        public T V66;
+        public T V67;
+        public T V68;
+        public T V69;
+        public T V70;
+        public T V71;
+        public T V72;
+        public T V73;
+        public T V74;
+        public T V75;
+        public T V76;
+        public T V77;
+        public T V78;
+        public T V79;
+        public T V80;
+        public T V81;
+        public T V82;
+        public T V83;
+        public T V84;
+        public T V85;
+        public T V86;
+        public T V87;
+        public T V88;
+        public T V89;
+        public T V90;
+        public T V91;
+        public T V92;
+        public T V93;
+        public T V94;
+        public T V95;
+        public T V96;
+        public T V97;
+        public T V98;
+        public T V99;
+        public T V100;
+        public T V101;
+        public T V102;
+        public T V103;
+        public T V104;
+        public T V105;
+        public T V106;
+        public T V107;
+        public T V108;
+        public T V109;
+        public T V110;
+        public T V111;
+        public T V112;
+        public T V113;
+        public T V114;
+        public T V115;
+        public T V116;
+        public T V117;
+        public T V118;
+        public T V119;
+        public T V120;
+        public T V121;
+        public T V122;
+        public T V123;
+        public T V124;
+        public T V125;
+        public T V126;
+        public T V127;
+        public T V128;
+        public T V129;
+        public T V130;
+        public T V131;
+        public T V132;
+        public T V133;
+        public T V134;
+        public T V135;
+        public T V136;
+        public T V137;
+        public T V138;
+        public T V139;
+        public T V140;
+        public T V141;
+        public T V142;
+        public T V143;
+        public T V144;
+        public T V145;
+        public T V146;
+        public T V147;
+        public T V148;
+        public T V149;
+        public T V150;
+        public T V151;
+        public T V152;
+        public T V153;
+        public T V154;
+        public T V155;
+        public T V156;
+        public T V157;
+        public T V158;
+        public T V159;
+        public T V160;
+        public T V161;
+        public T V162;
+        public T V163;
+        public T V164;
+        public T V165;
+        public T V166;
+        public T V167;
+        public T V168;
+        public T V169;
+        public T V170;
+        public T V171;
+        public T V172;
+        public T V173;
+        public T V174;
+        public T V175;
+        public T V176;
+        public T V177;
+        public T V178;
+        public T V179;
+        public T V180;
+        public T V181;
+        public T V182;
+        public T V183;
+        public T V184;
+        public T V185;
+        public T V186;
+        public T V187;
+        public T V188;
+        public T V189;
+        public T V190;
+        public T V191;
+        public T V192;
+        public T V193;
+        public T V194;
+        public T V195;
+        public T V196;
+        public T V197;
+        public T V198;
+        public T V199;
+        public T V200;
+        public T V201;
+        public T V202;
+        public T V203;
+        public T V204;
+        public T V205;
+        public T V206;
+        public T V207;
+        public T V208;
+        public T V209;
+        public T V210;
+        public T V211;
+        public T V212;
+        public T V213;
+        public T V214;
+        public T V215;
+        public T V216;
+        public T V217;
+        public T V218;
+        public T V219;
+        public T V220;
+        public T V221;
+        public T V222;
+        public T V223;
+        public T V224;
+        public T V225;
+        public T V226;
+        public T V227;
+        public T V228;
+        public T V229;
+        public T V230;
+        public T V231;
+        public T V232;
+        public T V233;
+        public T V234;
+        public T V235;
+        public T V236;
+        public T V237;
+        public T V238;
+        public T V239;
+        public T V240;
+        public T V241;
+        public T V242;
+        public T V243;
+        public T V244;
+        public T V245;
+        public T V246;
+        public T V247;
+        public T V248;
+        public T V249;
+        public T V250;
+        public T V251;
+        public T V252;
+        public T V253;
+        public T V254;
+        public T V255;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    4 => V4,
+                    5 => V5,
+                    6 => V6,
+                    7 => V7,
+                    8 => V8,
+                    9 => V9,
+                    10 => V10,
+                    11 => V11,
+                    12 => V12,
+                    13 => V13,
+                    14 => V14,
+                    15 => V15,
+                    16 => V16,
+                    17 => V17,
+                    18 => V18,
+                    19 => V19,
+                    20 => V20,
+                    21 => V21,
+                    22 => V22,
+                    23 => V23,
+                    24 => V24,
+                    25 => V25,
+                    26 => V26,
+                    27 => V27,
+                    28 => V28,
+                    29 => V29,
+                    30 => V30,
+                    31 => V31,
+                    32 => V32,
+                    33 => V33,
+                    34 => V34,
+                    35 => V35,
+                    36 => V36,
+                    37 => V37,
+                    38 => V38,
+                    39 => V39,
+                    40 => V40,
+                    41 => V41,
+                    42 => V42,
+                    43 => V43,
+                    44 => V44,
+                    45 => V45,
+                    46 => V46,
+                    47 => V47,
+                    48 => V48,
+                    49 => V49,
+                    50 => V50,
+                    51 => V51,
+                    52 => V52,
+                    53 => V53,
+                    54 => V54,
+                    55 => V55,
+                    56 => V56,
+                    57 => V57,
+                    58 => V58,
+                    59 => V59,
+                    60 => V60,
+                    61 => V61,
+                    62 => V62,
+                    63 => V63,
+                    64 => V64,
+                    65 => V65,
+                    66 => V66,
+                    67 => V67,
+                    68 => V68,
+                    69 => V69,
+                    70 => V70,
+                    71 => V71,
+                    72 => V72,
+                    73 => V73,
+                    74 => V74,
+                    75 => V75,
+                    76 => V76,
+                    77 => V77,
+                    78 => V78,
+                    79 => V79,
+                    80 => V80,
+                    81 => V81,
+                    82 => V82,
+                    83 => V83,
+                    84 => V84,
+                    85 => V85,
+                    86 => V86,
+                    87 => V87,
+                    88 => V88,
+                    89 => V89,
+                    90 => V90,
+                    91 => V91,
+                    92 => V92,
+                    93 => V93,
+                    94 => V94,
+                    95 => V95,
+                    96 => V96,
+                    97 => V97,
+                    98 => V98,
+                    99 => V99,
+                    100 => V100,
+                    101 => V101,
+                    102 => V102,
+                    103 => V103,
+                    104 => V104,
+                    105 => V105,
+                    106 => V106,
+                    107 => V107,
+                    108 => V108,
+                    109 => V109,
+                    110 => V110,
+                    111 => V111,
+                    112 => V112,
+                    113 => V113,
+                    114 => V114,
+                    115 => V115,
+                    116 => V116,
+                    117 => V117,
+                    118 => V118,
+                    119 => V119,
+                    120 => V120,
+                    121 => V121,
+                    122 => V122,
+                    123 => V123,
+                    124 => V124,
+                    125 => V125,
+                    126 => V126,
+                    127 => V127,
+                    128 => V128,
+                    129 => V129,
+                    130 => V130,
+                    131 => V131,
+                    132 => V132,
+                    133 => V133,
+                    134 => V134,
+                    135 => V135,
+                    136 => V136,
+                    137 => V137,
+                    138 => V138,
+                    139 => V139,
+                    140 => V140,
+                    141 => V141,
+                    142 => V142,
+                    143 => V143,
+                    144 => V144,
+                    145 => V145,
+                    146 => V146,
+                    147 => V147,
+                    148 => V148,
+                    149 => V149,
+                    150 => V150,
+                    151 => V151,
+                    152 => V152,
+                    153 => V153,
+                    154 => V154,
+                    155 => V155,
+                    156 => V156,
+                    157 => V157,
+                    158 => V158,
+                    159 => V159,
+                    160 => V160,
+                    161 => V161,
+                    162 => V162,
+                    163 => V163,
+                    164 => V164,
+                    165 => V165,
+                    166 => V166,
+                    167 => V167,
+                    168 => V168,
+                    169 => V169,
+                    170 => V170,
+                    171 => V171,
+                    172 => V172,
+                    173 => V173,
+                    174 => V174,
+                    175 => V175,
+                    176 => V176,
+                    177 => V177,
+                    178 => V178,
+                    179 => V179,
+                    180 => V180,
+                    181 => V181,
+                    182 => V182,
+                    183 => V183,
+                    184 => V184,
+                    185 => V185,
+                    186 => V186,
+                    187 => V187,
+                    188 => V188,
+                    189 => V189,
+                    190 => V190,
+                    191 => V191,
+                    192 => V192,
+                    193 => V193,
+                    194 => V194,
+                    195 => V195,
+                    196 => V196,
+                    197 => V197,
+                    198 => V198,
+                    199 => V199,
+                    200 => V200,
+                    201 => V201,
+                    202 => V202,
+                    203 => V203,
+                    204 => V204,
+                    205 => V205,
+                    206 => V206,
+                    207 => V207,
+                    208 => V208,
+                    209 => V209,
+                    210 => V210,
+                    211 => V211,
+                    212 => V212,
+                    213 => V213,
+                    214 => V214,
+                    215 => V215,
+                    216 => V216,
+                    217 => V217,
+                    218 => V218,
+                    219 => V219,
+                    220 => V220,
+                    221 => V221,
+                    222 => V222,
+                    223 => V223,
+                    224 => V224,
+                    225 => V225,
+                    226 => V226,
+                    227 => V227,
+                    228 => V228,
+                    229 => V229,
+                    230 => V230,
+                    231 => V231,
+                    232 => V232,
+                    233 => V233,
+                    234 => V234,
+                    235 => V235,
+                    236 => V236,
+                    237 => V237,
+                    238 => V238,
+                    239 => V239,
+                    240 => V240,
+                    241 => V241,
+                    242 => V242,
+                    243 => V243,
+                    244 => V244,
+                    245 => V245,
+                    246 => V246,
+                    247 => V247,
+                    248 => V248,
+                    249 => V249,
+                    250 => V250,
+                    251 => V251,
+                    252 => V252,
+                    253 => V253,
+                    254 => V254,
+                    255 => V255,
+                    _ => throw new ArgumentOutOfRangeException(nameof(index), index, null)
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                    case 4: V4 = value; break;
+                    case 5: V5 = value; break;
+                    case 6: V6 = value; break;
+                    case 7: V7 = value; break;
+                    case 8: V8 = value; break;
+                    case 9: V9 = value; break;
+                    case 10: V10 = value; break;
+                    case 11: V11 = value; break;
+                    case 12: V12 = value; break;
+                    case 13: V13 = value; break;
+                    case 14: V14 = value; break;
+                    case 15: V15 = value; break;
+                    case 16: V16 = value; break;
+                    case 17: V17 = value; break;
+                    case 18: V18 = value; break;
+                    case 19: V19 = value; break;
+                    case 20: V20 = value; break;
+                    case 21: V21 = value; break;
+                    case 22: V22 = value; break;
+                    case 23: V23 = value; break;
+                    case 24: V24 = value; break;
+                    case 25: V25 = value; break;
+                    case 26: V26 = value; break;
+                    case 27: V27 = value; break;
+                    case 28: V28 = value; break;
+                    case 29: V29 = value; break;
+                    case 30: V30 = value; break;
+                    case 31: V31 = value; break;
+                    case 32: V32 = value; break;
+                    case 33: V33 = value; break;
+                    case 34: V34 = value; break;
+                    case 35: V35 = value; break;
+                    case 36: V36 = value; break;
+                    case 37: V37 = value; break;
+                    case 38: V38 = value; break;
+                    case 39: V39 = value; break;
+                    case 40: V40 = value; break;
+                    case 41: V41 = value; break;
+                    case 42: V42 = value; break;
+                    case 43: V43 = value; break;
+                    case 44: V44 = value; break;
+                    case 45: V45 = value; break;
+                    case 46: V46 = value; break;
+                    case 47: V47 = value; break;
+                    case 48: V48 = value; break;
+                    case 49: V49 = value; break;
+                    case 50: V50 = value; break;
+                    case 51: V51 = value; break;
+                    case 52: V52 = value; break;
+                    case 53: V53 = value; break;
+                    case 54: V54 = value; break;
+                    case 55: V55 = value; break;
+                    case 56: V56 = value; break;
+                    case 57: V57 = value; break;
+                    case 58: V58 = value; break;
+                    case 59: V59 = value; break;
+                    case 60: V60 = value; break;
+                    case 61: V61 = value; break;
+                    case 62: V62 = value; break;
+                    case 63: V63 = value; break;
+                    case 64: V64 = value; break;
+                    case 65: V65 = value; break;
+                    case 66: V66 = value; break;
+                    case 67: V67 = value; break;
+                    case 68: V68 = value; break;
+                    case 69: V69 = value; break;
+                    case 70: V70 = value; break;
+                    case 71: V71 = value; break;
+                    case 72: V72 = value; break;
+                    case 73: V73 = value; break;
+                    case 74: V74 = value; break;
+                    case 75: V75 = value; break;
+                    case 76: V76 = value; break;
+                    case 77: V77 = value; break;
+                    case 78: V78 = value; break;
+                    case 79: V79 = value; break;
+                    case 80: V80 = value; break;
+                    case 81: V81 = value; break;
+                    case 82: V82 = value; break;
+                    case 83: V83 = value; break;
+                    case 84: V84 = value; break;
+                    case 85: V85 = value; break;
+                    case 86: V86 = value; break;
+                    case 87: V87 = value; break;
+                    case 88: V88 = value; break;
+                    case 89: V89 = value; break;
+                    case 90: V90 = value; break;
+                    case 91: V91 = value; break;
+                    case 92: V92 = value; break;
+                    case 93: V93 = value; break;
+                    case 94: V94 = value; break;
+                    case 95: V95 = value; break;
+                    case 96: V96 = value; break;
+                    case 97: V97 = value; break;
+                    case 98: V98 = value; break;
+                    case 99: V99 = value; break;
+                    case 100: V100 = value; break;
+                    case 101: V101 = value; break;
+                    case 102: V102 = value; break;
+                    case 103: V103 = value; break;
+                    case 104: V104 = value; break;
+                    case 105: V105 = value; break;
+                    case 106: V106 = value; break;
+                    case 107: V107 = value; break;
+                    case 108: V108 = value; break;
+                    case 109: V109 = value; break;
+                    case 110: V110 = value; break;
+                    case 111: V111 = value; break;
+                    case 112: V112 = value; break;
+                    case 113: V113 = value; break;
+                    case 114: V114 = value; break;
+                    case 115: V115 = value; break;
+                    case 116: V116 = value; break;
+                    case 117: V117 = value; break;
+                    case 118: V118 = value; break;
+                    case 119: V119 = value; break;
+                    case 120: V120 = value; break;
+                    case 121: V121 = value; break;
+                    case 122: V122 = value; break;
+                    case 123: V123 = value; break;
+                    case 124: V124 = value; break;
+                    case 125: V125 = value; break;
+                    case 126: V126 = value; break;
+                    case 127: V127 = value; break;
+                    case 128: V128 = value; break;
+                    case 129: V129 = value; break;
+                    case 130: V130 = value; break;
+                    case 131: V131 = value; break;
+                    case 132: V132 = value; break;
+                    case 133: V133 = value; break;
+                    case 134: V134 = value; break;
+                    case 135: V135 = value; break;
+                    case 136: V136 = value; break;
+                    case 137: V137 = value; break;
+                    case 138: V138 = value; break;
+                    case 139: V139 = value; break;
+                    case 140: V140 = value; break;
+                    case 141: V141 = value; break;
+                    case 142: V142 = value; break;
+                    case 143: V143 = value; break;
+                    case 144: V144 = value; break;
+                    case 145: V145 = value; break;
+                    case 146: V146 = value; break;
+                    case 147: V147 = value; break;
+                    case 148: V148 = value; break;
+                    case 149: V149 = value; break;
+                    case 150: V150 = value; break;
+                    case 151: V151 = value; break;
+                    case 152: V152 = value; break;
+                    case 153: V153 = value; break;
+                    case 154: V154 = value; break;
+                    case 155: V155 = value; break;
+                    case 156: V156 = value; break;
+                    case 157: V157 = value; break;
+                    case 158: V158 = value; break;
+                    case 159: V159 = value; break;
+                    case 160: V160 = value; break;
+                    case 161: V161 = value; break;
+                    case 162: V162 = value; break;
+                    case 163: V163 = value; break;
+                    case 164: V164 = value; break;
+                    case 165: V165 = value; break;
+                    case 166: V166 = value; break;
+                    case 167: V167 = value; break;
+                    case 168: V168 = value; break;
+                    case 169: V169 = value; break;
+                    case 170: V170 = value; break;
+                    case 171: V171 = value; break;
+                    case 172: V172 = value; break;
+                    case 173: V173 = value; break;
+                    case 174: V174 = value; break;
+                    case 175: V175 = value; break;
+                    case 176: V176 = value; break;
+                    case 177: V177 = value; break;
+                    case 178: V178 = value; break;
+                    case 179: V179 = value; break;
+                    case 180: V180 = value; break;
+                    case 181: V181 = value; break;
+                    case 182: V182 = value; break;
+                    case 183: V183 = value; break;
+                    case 184: V184 = value; break;
+                    case 185: V185 = value; break;
+                    case 186: V186 = value; break;
+                    case 187: V187 = value; break;
+                    case 188: V188 = value; break;
+                    case 189: V189 = value; break;
+                    case 190: V190 = value; break;
+                    case 191: V191 = value; break;
+                    case 192: V192 = value; break;
+                    case 193: V193 = value; break;
+                    case 194: V194 = value; break;
+                    case 195: V195 = value; break;
+                    case 196: V196 = value; break;
+                    case 197: V197 = value; break;
+                    case 198: V198 = value; break;
+                    case 199: V199 = value; break;
+                    case 200: V200 = value; break;
+                    case 201: V201 = value; break;
+                    case 202: V202 = value; break;
+                    case 203: V203 = value; break;
+                    case 204: V204 = value; break;
+                    case 205: V205 = value; break;
+                    case 206: V206 = value; break;
+                    case 207: V207 = value; break;
+                    case 208: V208 = value; break;
+                    case 209: V209 = value; break;
+                    case 210: V210 = value; break;
+                    case 211: V211 = value; break;
+                    case 212: V212 = value; break;
+                    case 213: V213 = value; break;
+                    case 214: V214 = value; break;
+                    case 215: V215 = value; break;
+                    case 216: V216 = value; break;
+                    case 217: V217 = value; break;
+                    case 218: V218 = value; break;
+                    case 219: V219 = value; break;
+                    case 220: V220 = value; break;
+                    case 221: V221 = value; break;
+                    case 222: V222 = value; break;
+                    case 223: V223 = value; break;
+                    case 224: V224 = value; break;
+                    case 225: V225 = value; break;
+                    case 226: V226 = value; break;
+                    case 227: V227 = value; break;
+                    case 228: V228 = value; break;
+                    case 229: V229 = value; break;
+                    case 230: V230 = value; break;
+                    case 231: V231 = value; break;
+                    case 232: V232 = value; break;
+                    case 233: V233 = value; break;
+                    case 234: V234 = value; break;
+                    case 235: V235 = value; break;
+                    case 236: V236 = value; break;
+                    case 237: V237 = value; break;
+                    case 238: V238 = value; break;
+                    case 239: V239 = value; break;
+                    case 240: V240 = value; break;
+                    case 241: V241 = value; break;
+                    case 242: V242 = value; break;
+                    case 243: V243 = value; break;
+                    case 244: V244 = value; break;
+                    case 245: V245 = value; break;
+                    case 246: V246 = value; break;
+                    case 247: V247 = value; break;
+                    case 248: V248 = value; break;
+                    case 249: V249 = value; break;
+                    case 250: V250 = value; break;
+                    case 251: V251 = value; break;
+                    case 252: V252 = value; break;
+                    case 253: V253 = value; break;
+                    case 254: V254 = value; break;
+                    case 255: V255 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray32.cs

@@ -0,0 +1,133 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray32<T>
+    {
+        public static RcStackArray32<T> Empty => new RcStackArray32<T>();
+
+        private const int Size = 32;
+        public int Length => Size;
+        
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+        public T V4;
+        public T V5;
+        public T V6;
+        public T V7;
+        public T V8;
+        public T V9;
+        public T V10;
+        public T V11;
+        public T V12;
+        public T V13;
+        public T V14;
+        public T V15;
+        public T V16;
+        public T V17;
+        public T V18;
+        public T V19;
+        public T V20;
+        public T V21;
+        public T V22;
+        public T V23;
+        public T V24;
+        public T V25;
+        public T V26;
+        public T V27;
+        public T V28;
+        public T V29;
+        public T V30;
+        public T V31;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    4 => V4,
+                    5 => V5,
+                    6 => V6,
+                    7 => V7,
+                    8 => V8,
+                    9 => V9,
+                    10 => V10,
+                    11 => V11,
+                    12 => V12,
+                    13 => V13,
+                    14 => V14,
+                    15 => V15,
+                    16 => V16,
+                    17 => V17,
+                    18 => V18,
+                    19 => V19,
+                    20 => V20,
+                    21 => V21,
+                    22 => V22,
+                    23 => V23,
+                    24 => V24,
+                    25 => V25,
+                    26 => V26,
+                    27 => V27,
+                    28 => V28,
+                    29 => V29,
+                    30 => V30,
+                    31 => V31,
+                    _ => throw new IndexOutOfRangeException($"{index}")
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                    case 4: V4 = value; break;
+                    case 5: V5 = value; break;
+                    case 6: V6 = value; break;
+                    case 7: V7 = value; break;
+                    case 8: V8 = value; break;
+                    case 9: V9 = value; break;
+                    case 10: V10 = value; break;
+                    case 11: V11 = value; break;
+                    case 12: V12 = value; break;
+                    case 13: V13 = value; break;
+                    case 14: V14 = value; break;
+                    case 15: V15 = value; break;
+                    case 16: V16 = value; break;
+                    case 17: V17 = value; break;
+                    case 18: V18 = value; break;
+                    case 19: V19 = value; break;
+                    case 20: V20 = value; break;
+                    case 21: V21 = value; break;
+                    case 22: V22 = value; break;
+                    case 23: V23 = value; break;
+                    case 24: V24 = value; break;
+                    case 25: V25 = value; break;
+                    case 26: V26 = value; break;
+                    case 27: V27 = value; break;
+                    case 28: V28 = value; break;
+                    case 29: V29 = value; break;
+                    case 30: V30 = value; break;
+                    case 31: V31 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray4.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray4<T>
+    {
+        public static RcStackArray4<T> Empty => new RcStackArray4<T>();
+
+        private const int Size = 4;
+        public int Length => Size;
+
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    _ => throw new IndexOutOfRangeException($"{index}")
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray64.cs

@@ -0,0 +1,229 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray64<T>
+    {
+        public static RcStackArray64<T> Empty => new RcStackArray64<T>();
+
+        private const int Size = 64;
+        public int Length => Size;
+        
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+        public T V4;
+        public T V5;
+        public T V6;
+        public T V7;
+        public T V8;
+        public T V9;
+        public T V10;
+        public T V11;
+        public T V12;
+        public T V13;
+        public T V14;
+        public T V15;
+        public T V16;
+        public T V17;
+        public T V18;
+        public T V19;
+        public T V20;
+        public T V21;
+        public T V22;
+        public T V23;
+        public T V24;
+        public T V25;
+        public T V26;
+        public T V27;
+        public T V28;
+        public T V29;
+        public T V30;
+        public T V31;
+        public T V32;
+        public T V33;
+        public T V34;
+        public T V35;
+        public T V36;
+        public T V37;
+        public T V38;
+        public T V39;
+        public T V40;
+        public T V41;
+        public T V42;
+        public T V43;
+        public T V44;
+        public T V45;
+        public T V46;
+        public T V47;
+        public T V48;
+        public T V49;
+        public T V50;
+        public T V51;
+        public T V52;
+        public T V53;
+        public T V54;
+        public T V55;
+        public T V56;
+        public T V57;
+        public T V58;
+        public T V59;
+        public T V60;
+        public T V61;
+        public T V62;
+        public T V63;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    4 => V4,
+                    5 => V5,
+                    6 => V6,
+                    7 => V7,
+                    8 => V8,
+                    9 => V9,
+                    10 => V10,
+                    11 => V11,
+                    12 => V12,
+                    13 => V13,
+                    14 => V14,
+                    15 => V15,
+                    16 => V16,
+                    17 => V17,
+                    18 => V18,
+                    19 => V19,
+                    20 => V20,
+                    21 => V21,
+                    22 => V22,
+                    23 => V23,
+                    24 => V24,
+                    25 => V25,
+                    26 => V26,
+                    27 => V27,
+                    28 => V28,
+                    29 => V29,
+                    30 => V30,
+                    31 => V31,
+                    32 => V32,
+                    33 => V33,
+                    34 => V34,
+                    35 => V35,
+                    36 => V36,
+                    37 => V37,
+                    38 => V38,
+                    39 => V39,
+                    40 => V40,
+                    41 => V41,
+                    42 => V42,
+                    43 => V43,
+                    44 => V44,
+                    45 => V45,
+                    46 => V46,
+                    47 => V47,
+                    48 => V48,
+                    49 => V49,
+                    50 => V50,
+                    51 => V51,
+                    52 => V52,
+                    53 => V53,
+                    54 => V54,
+                    55 => V55,
+                    56 => V56,
+                    57 => V57,
+                    58 => V58,
+                    59 => V59,
+                    60 => V60,
+                    61 => V61,
+                    62 => V62,
+                    63 => V63,
+                    _ => throw new ArgumentOutOfRangeException(nameof(index), index, null)
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                    case 4: V4 = value; break;
+                    case 5: V5 = value; break;
+                    case 6: V6 = value; break;
+                    case 7: V7 = value; break;
+                    case 8: V8 = value; break;
+                    case 9: V9 = value; break;
+                    case 10: V10 = value; break;
+                    case 11: V11 = value; break;
+                    case 12: V12 = value; break;
+                    case 13: V13 = value; break;
+                    case 14: V14 = value; break;
+                    case 15: V15 = value; break;
+                    case 16: V16 = value; break;
+                    case 17: V17 = value; break;
+                    case 18: V18 = value; break;
+                    case 19: V19 = value; break;
+                    case 20: V20 = value; break;
+                    case 21: V21 = value; break;
+                    case 22: V22 = value; break;
+                    case 23: V23 = value; break;
+                    case 24: V24 = value; break;
+                    case 25: V25 = value; break;
+                    case 26: V26 = value; break;
+                    case 27: V27 = value; break;
+                    case 28: V28 = value; break;
+                    case 29: V29 = value; break;
+                    case 30: V30 = value; break;
+                    case 31: V31 = value; break;
+                    case 32 : V32 = value; break;
+                    case 33 : V33 = value; break;
+                    case 34 : V34 = value; break;
+                    case 35 : V35 = value; break;
+                    case 36 : V36 = value; break;
+                    case 37 : V37 = value; break;
+                    case 38 : V38 = value; break;
+                    case 39 : V39 = value; break;
+                    case 40 : V40 = value; break;
+                    case 41 : V41 = value; break;
+                    case 42 : V42 = value; break;
+                    case 43 : V43 = value; break;
+                    case 44 : V44 = value; break;
+                    case 45 : V45 = value; break;
+                    case 46 : V46 = value; break;
+                    case 47 : V47 = value; break;
+                    case 48 : V48 = value; break;
+                    case 49 : V49 = value; break;
+                    case 50 : V50 = value; break;
+                    case 51 : V51 = value; break;
+                    case 52 : V52 = value; break;
+                    case 53 : V53 = value; break;
+                    case 54 : V54 = value; break;
+                    case 55 : V55 = value; break;
+                    case 56 : V56 = value; break;
+                    case 57 : V57 = value; break;
+                    case 58 : V58 = value; break;
+                    case 59 : V59 = value; break;
+                    case 60 : V60 = value; break;
+                    case 61 : V61 = value; break;
+                    case 62 : V62 = value; break;
+                    case 63 : V63 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/Collections/RcStackArray8.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core.Collections
+{
+    public struct RcStackArray8<T>
+    {
+        public static RcStackArray8<T> Empty => new RcStackArray8<T>();
+
+        private const int Size = 8;
+        public int Length => Size;
+        
+        public T V0;
+        public T V1;
+        public T V2;
+        public T V3;
+        public T V4;
+        public T V5;
+        public T V6;
+        public T V7;
+
+        public T this[int index]
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                return index switch
+                {
+                    0 => V0,
+                    1 => V1,
+                    2 => V2,
+                    3 => V3,
+                    4 => V4,
+                    5 => V5,
+                    6 => V6,
+                    7 => V7,
+                    _ => throw new IndexOutOfRangeException($"{index}")
+                };
+            }
+
+            set
+            {
+                RcThrowHelper.ThrowExceptionIfIndexOutOfRange(index, Length);
+
+                switch (index)
+                {
+                    case 0: V0 = value; break;
+                    case 1: V1 = value; break;
+                    case 2: V2 = value; break;
+                    case 3: V3 = value; break;
+                    case 4: V4 = value; break;
+                    case 5: V5 = value; break;
+                    case 6: V6 = value; break;
+                    case 7: V7 = value; break;
+                }
+            }
+        }
+    }
+}

src/DotRecast.Core/DotRecast.Core.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Core</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
   
   <ItemGroup>

src/DotRecast.Core/Numerics/RcVec2f.cs

@@ -3,58 +3,58 @@ using System.Runtime.CompilerServices;
 
 namespace DotRecast.Core.Numerics
 {
-    // public struct Vector2
-    // {
-    //     public float X;
-    //     public float Y;
-    //
-    //     public static Vector2 Zero { get; } = new Vector2 { X = 0, Y = 0 };
-    //
-    //     public Vector2(float x, float y)
-    //     {
-    //         X = x;
-    //         Y = y;
-    //     }
-    //
-    //     public override bool Equals(object obj)
-    //     {
-    //         if (!(obj is Vector2))
-    //             return false;
-    //
-    //         return Equals((Vector2)obj);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public bool Equals(Vector2 other)
-    //     {
-    //         return X.Equals(other.X) &&
-    //                Y.Equals(other.Y);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public override int GetHashCode()
-    //     {
-    //         int hash = X.GetHashCode();
-    //         hash = RcHashCodes.CombineHashCodes(hash, Y.GetHashCode());
-    //         return hash;
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static bool operator ==(Vector2 left, Vector2 right)
-    //     {
-    //         return left.Equals(right);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static bool operator !=(Vector2 left, Vector2 right)
-    //     {
-    //         return !left.Equals(right);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public override string ToString()
-    //     {
-    //         return $"{X}, {Y}";
-    //     }
-    // }
+    public struct RcVec2f
+    {
+        public float X;
+        public float Y;
+
+        public static readonly RcVec2f Zero = new RcVec2f { X = 0, Y = 0 };
+
+        public RcVec2f(float x, float y)
+        {
+            X = x;
+            Y = y;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (!(obj is RcVec2f))
+                return false;
+
+            return Equals((RcVec2f)obj);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool Equals(RcVec2f other)
+        {
+            return X.Equals(other.X) &&
+                   Y.Equals(other.Y);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override int GetHashCode()
+        {
+            int hash = X.GetHashCode();
+            hash = RcHashCodes.CombineHashCodes(hash, Y.GetHashCode());
+            return hash;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool operator ==(RcVec2f left, RcVec2f right)
+        {
+            return left.Equals(right);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool operator !=(RcVec2f left, RcVec2f right)
+        {
+            return !left.Equals(right);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override string ToString()
+        {
+            return $"{X}, {Y}";
+        }
+    }
 }

src/DotRecast.Core/Numerics/RcVec3f.cs

@@ -21,240 +21,240 @@ using System.Runtime.CompilerServices;
 
 namespace DotRecast.Core.Numerics
 {
-    // public struct Vector3
-    // {
-    //     public float X;
-    //     public float Y;
-    //     public float Z;
-    //
-    //     public static Vector3 Zero { get; } = new Vector3(0.0f, 0.0f, 0.0f);
-    //     public static Vector3 One { get; } = new Vector3(1.0f);
-    //     public static Vector3 UnitX { get; } = new Vector3(1.0f, 0.0f, 0.0f);
-    //     public static Vector3 UnitY { get; } = new Vector3(0.0f, 1.0f, 0.0f);
-    //     public static Vector3 UnitZ { get; } = new Vector3(0.0f, 0.0f, 1.0f);
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public Vector3(float x, float y, float z)
-    //     {
-    //         X = x;
-    //         Y = y;
-    //         Z = z;
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public Vector3(float f)
-    //     {
-    //         X = f;
-    //         Y = f;
-    //         Z = f;
-    //     }
-    //
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public readonly float Length()
-    //     {
-    //         float lengthSquared = LengthSquared();
-    //         return MathF.Sqrt(lengthSquared);
-    //     }
-    //
-    //     /// Derives the square of the scalar length of the vector. (len * len)
-    //     /// @param[in] v The vector. [(x, y, z)]
-    //     /// @return The square of the scalar length of the vector.
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public readonly float LengthSquared()
-    //     {
-    //         return Dot(this, this);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Subtract(Vector3 left, Vector3 right)
-    //     {
-    //         return left - right;
-    //     }
-    //
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Add(Vector3 left, Vector3 right)
-    //     {
-    //         return left + right;
-    //     }
-    //
-    //
-    //     public override bool Equals(object obj)
-    //     {
-    //         if (!(obj is Vector3))
-    //             return false;
-    //
-    //         return Equals((Vector3)obj);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public bool Equals(Vector3 other)
-    //     {
-    //         return X.Equals(other.X) &&
-    //                Y.Equals(other.Y) &&
-    //                Z.Equals(other.Z);
-    //     }
-    //
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public override int GetHashCode()
-    //     {
-    //         return HashCode.Combine(X, Y, Z);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Min(Vector3 value1, Vector3 value2)
-    //     {
-    //         return new Vector3(
-    //             (value1.X < value2.X) ? value1.X : value2.X,
-    //             (value1.Y < value2.Y) ? value1.Y : value2.Y,
-    //             (value1.Z < value2.Z) ? value1.Z : value2.Z
-    //         );
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Max(Vector3 value1, Vector3 value2)
-    //     {
-    //         return new Vector3(
-    //             (value1.X > value2.X) ? value1.X : value2.X,
-    //             (value1.Y > value2.Y) ? value1.Y : value2.Y,
-    //             (value1.Z > value2.Z) ? value1.Z : value2.Z
-    //         );
-    //     }
-    //
-    //     public override string ToString()
-    //     {
-    //         return $"{X}, {Y}, {Z}";
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static bool operator ==(Vector3 left, Vector3 right)
-    //     {
-    //         return left.Equals(right);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static bool operator !=(Vector3 left, Vector3 right)
-    //     {
-    //         return !left.Equals(right);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 operator -(Vector3 left, Vector3 right)
-    //     {
-    //         return new Vector3(
-    //             left.X - right.X,
-    //             left.Y - right.Y,
-    //             left.Z - right.Z
-    //         );
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 operator +(Vector3 left, Vector3 right)
-    //     {
-    //         return new Vector3(
-    //             left.X + right.X,
-    //             left.Y + right.Y,
-    //             left.Z + right.Z
-    //         );
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 operator *(Vector3 left, Vector3 right)
-    //     {
-    //         return new Vector3(
-    //             left.X * right.X,
-    //             left.Y * right.Y,
-    //             left.Z * right.Z
-    //         );
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 operator *(Vector3 left, float right)
-    //     {
-    //         return left * new Vector3(right);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 operator *(float left, Vector3 right)
-    //     {
-    //         return right * left;
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Lerp(Vector3 value1, Vector3 value2, float amount)
-    //     {
-    //         return (value1 * (1f - amount)) + (value2 * amount);
-    //         // return new Vector3(
-    //         //     value1.X + (value2.X - value1.X) * amount,
-    //         //     value1.Y + (value2.Y - value1.Y) * amount,
-    //         //     value1.Z + (value2.Z - value1.Z) * amount
-    //         // );
-    //     }
-    //
-    //     /// Returns the distance between two points.
-    //     /// @param[in] v1 A point. [(x, y, z)]
-    //     /// @param[in] v2 A point. [(x, y, z)]
-    //     /// @return The distance between the two points.
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static float Distance(Vector3 value1, Vector3 value2)
-    //     {
-    //         float distanceSquared = DistanceSquared(value1, value2);
-    //         return MathF.Sqrt(distanceSquared);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static float DistanceSquared(Vector3 value1, Vector3 value2)
-    //     {
-    //         var difference = value1 - value2;
-    //         return Dot(difference, difference);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static float Dot(Vector3 vector1, Vector3 vector2)
-    //     {
-    //         return (vector1.X * vector2.X) +
-    //                (vector1.Y * vector2.Y) +
-    //                (vector1.Z * vector2.Z);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public readonly void CopyTo(float[] array)
-    //     {
-    //         CopyTo(array, 0);
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public readonly void CopyTo(float[] array, int n)
-    //     {
-    //         array[n + 0] = X;
-    //         array[n + 1] = Y;
-    //         array[n + 2] = Z;
-    //     }
-    //
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Cross(Vector3 v1, Vector3 v2)
-    //     {
-    //         return new Vector3(
-    //             (v1.Y * v2.Z) - (v1.Z * v2.Y),
-    //             (v1.Z * v2.X) - (v1.X * v2.Z),
-    //             (v1.X * v2.Y) - (v1.Y * v2.X)
-    //         );
-    //     }
-    //
-    //     /// Normalizes the vector.
-    //     /// @param[in,out] v The vector to normalize. [(x, y, z)]
-    //     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    //     public static Vector3 Normalize(Vector3 v)
-    //     {
-    //         float d = 1.0f / MathF.Sqrt(RcMath.Sqr(v.X) + RcMath.Sqr(v.Y) + RcMath.Sqr(v.Z));
-    //
-    //         return new Vector3(
-    //             v.X *= d,
-    //             v.Y *= d,
-    //             v.Z *= d
-    //         );
-    //     }
-    // }
+    public struct RcVec3f
+    {
+        public float X;
+        public float Y;
+        public float Z;
+
+        public static readonly RcVec3f Zero = new RcVec3f(0.0f, 0.0f, 0.0f);
+        public static readonly RcVec3f One = new RcVec3f(1.0f);
+        public static readonly RcVec3f UnitX = new RcVec3f(1.0f, 0.0f, 0.0f);
+        public static readonly RcVec3f UnitY = new RcVec3f(0.0f, 1.0f, 0.0f);
+        public static readonly RcVec3f UnitZ = new RcVec3f(0.0f, 0.0f, 1.0f);
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public RcVec3f(float x, float y, float z)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public RcVec3f(float f)
+        {
+            X = f;
+            Y = f;
+            Z = f;
+        }
+
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public readonly float Length()
+        {
+            float lengthSquared = LengthSquared();
+            return MathF.Sqrt(lengthSquared);
+        }
+
+        /// Derives the square of the scalar length of the vector. (len * len)
+        /// @param[in] v The vector. [(x, y, z)]
+        /// @return The square of the scalar length of the vector.
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public readonly float LengthSquared()
+        {
+            return Dot(this, this);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Subtract(RcVec3f left, RcVec3f right)
+        {
+            return left - right;
+        }
+
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Add(RcVec3f left, RcVec3f right)
+        {
+            return left + right;
+        }
+
+
+        public override bool Equals(object obj)
+        {
+            if (!(obj is RcVec3f))
+                return false;
+
+            return Equals((RcVec3f)obj);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool Equals(RcVec3f other)
+        {
+            return X.Equals(other.X) &&
+                   Y.Equals(other.Y) &&
+                   Z.Equals(other.Z);
+        }
+
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(X, Y, Z);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Min(RcVec3f value1, RcVec3f value2)
+        {
+            return new RcVec3f(
+                (value1.X < value2.X) ? value1.X : value2.X,
+                (value1.Y < value2.Y) ? value1.Y : value2.Y,
+                (value1.Z < value2.Z) ? value1.Z : value2.Z
+            );
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Max(RcVec3f value1, RcVec3f value2)
+        {
+            return new RcVec3f(
+                (value1.X > value2.X) ? value1.X : value2.X,
+                (value1.Y > value2.Y) ? value1.Y : value2.Y,
+                (value1.Z > value2.Z) ? value1.Z : value2.Z
+            );
+        }
+
+        public override string ToString()
+        {
+            return $"{X}, {Y}, {Z}";
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool operator ==(RcVec3f left, RcVec3f right)
+        {
+            return left.Equals(right);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool operator !=(RcVec3f left, RcVec3f right)
+        {
+            return !left.Equals(right);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f operator -(RcVec3f left, RcVec3f right)
+        {
+            return new RcVec3f(
+                left.X - right.X,
+                left.Y - right.Y,
+                left.Z - right.Z
+            );
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f operator +(RcVec3f left, RcVec3f right)
+        {
+            return new RcVec3f(
+                left.X + right.X,
+                left.Y + right.Y,
+                left.Z + right.Z
+            );
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f operator *(RcVec3f left, RcVec3f right)
+        {
+            return new RcVec3f(
+                left.X * right.X,
+                left.Y * right.Y,
+                left.Z * right.Z
+            );
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f operator *(RcVec3f left, float right)
+        {
+            return left * new RcVec3f(right);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f operator *(float left, RcVec3f right)
+        {
+            return right * left;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Lerp(RcVec3f value1, RcVec3f value2, float amount)
+        {
+            return (value1 * (1f - amount)) + (value2 * amount);
+            // return new RcVec3f(
+            //     value1.X + (value2.X - value1.X) * amount,
+            //     value1.Y + (value2.Y - value1.Y) * amount,
+            //     value1.Z + (value2.Z - value1.Z) * amount
+            // );
+        }
+
+        /// Returns the distance between two points.
+        /// @param[in] v1 A point. [(x, y, z)]
+        /// @param[in] v2 A point. [(x, y, z)]
+        /// @return The distance between the two points.
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Distance(RcVec3f value1, RcVec3f value2)
+        {
+            float distanceSquared = DistanceSquared(value1, value2);
+            return MathF.Sqrt(distanceSquared);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float DistanceSquared(RcVec3f value1, RcVec3f value2)
+        {
+            var difference = value1 - value2;
+            return Dot(difference, difference);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Dot(RcVec3f vector1, RcVec3f vector2)
+        {
+            return (vector1.X * vector2.X) +
+                   (vector1.Y * vector2.Y) +
+                   (vector1.Z * vector2.Z);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public readonly void CopyTo(float[] array)
+        {
+            CopyTo(array, 0);
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public readonly void CopyTo(float[] array, int n)
+        {
+            array[n + 0] = X;
+            array[n + 1] = Y;
+            array[n + 2] = Z;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Cross(RcVec3f v1, RcVec3f v2)
+        {
+            return new RcVec3f(
+                (v1.Y * v2.Z) - (v1.Z * v2.Y),
+                (v1.Z * v2.X) - (v1.X * v2.Z),
+                (v1.X * v2.Y) - (v1.Y * v2.X)
+            );
+        }
+
+        /// Normalizes the vector.
+        /// @param[in,out] v The vector to normalize. [(x, y, z)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static RcVec3f Normalize(RcVec3f v)
+        {
+            float d = 1.0f / MathF.Sqrt(RcMath.Sqr(v.X) + RcMath.Sqr(v.Y) + RcMath.Sqr(v.Z));
+
+            return new RcVec3f(
+                v.X *= d,
+                v.Y *= d,
+                v.Z *= d
+            );
+        }
+    }
 }

src/DotRecast.Core/Numerics/RcVecUtils.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Numerics;
 using System.Runtime.CompilerServices;
 
 namespace DotRecast.Core.Numerics
@@ -9,19 +8,19 @@ namespace DotRecast.Core.Numerics
         public const float EPSILON = 1e-6f;
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Create(float[] values)
+        public static RcVec3f Create(float[] values)
         {
             return Create(values, 0);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Create(float[] values, int n)
+        public static RcVec3f Create(float[] values, int n)
         {
-            return new Vector3(values[n + 0], values[n + 1], values[n + 2]);
+            return new RcVec3f(values[n + 0], values[n + 1], values[n + 2]);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Get(this Vector2 v, int i)
+        public static float Get(this RcVec2f v, int i)
         {
             switch (i)
             {
@@ -32,7 +31,7 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Get(this Vector3 v, int i)
+        public static float Get(this RcVec3f v, int i)
         {
             switch (i)
             {
@@ -44,7 +43,7 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Scale(this Vector3 v, float scale)
+        public static RcVec3f Scale(this RcVec3f v, float scale)
         {
             return v * scale;
         }
@@ -57,23 +56,23 @@ namespace DotRecast.Core.Numerics
         /// The vectors are projected onto the xz-plane, so the y-values are
         /// ignored.
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Dot2D(this Vector3 @this, Vector3 v)
+        public static float Dot2D(this RcVec3f @this, RcVec3f v)
         {
             return @this.X * v.X +
                    @this.Z * v.Z;
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Dot2D(this Vector3 @this, float[] v, int vi)
+        public static float Dot2D(this RcVec3f @this, float[] v, int vi)
         {
             return @this.X * v[vi] +
                    @this.Z * v[vi + 2];
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Add(Vector3 a, float[] verts, int i)
+        public static RcVec3f Add(RcVec3f a, float[] verts, int i)
         {
-            return new Vector3(
+            return new RcVec3f(
                 a.X + verts[i],
                 a.Y + verts[i + 1],
                 a.Z + verts[i + 2]
@@ -82,9 +81,9 @@ namespace DotRecast.Core.Numerics
 
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Subtract(float[] verts, int i, int j)
+        public static RcVec3f Subtract(float[] verts, int i, int j)
         {
-            return new Vector3(
+            return new RcVec3f(
                 verts[i] - verts[j],
                 verts[i + 1] - verts[j + 1],
                 verts[i + 2] - verts[j + 2]
@@ -93,9 +92,9 @@ namespace DotRecast.Core.Numerics
 
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Subtract(Vector3 i, float[] verts, int j)
+        public static RcVec3f Subtract(RcVec3f i, float[] verts, int j)
         {
-            return new Vector3(
+            return new RcVec3f(
                 i.X - verts[j],
                 i.Y - verts[j + 1],
                 i.Z - verts[j + 2]
@@ -128,7 +127,7 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Dot(float[] v1, Vector3 vector2)
+        public static float Dot(float[] v1, RcVec3f vector2)
         {
             return v1[0] * vector2.X +
                    v1[1] * vector2.Y +
@@ -140,7 +139,7 @@ namespace DotRecast.Core.Numerics
         /// @param[in] v2 A point. [(x, y, z)]
         /// @return The distance between the two points.
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float DistanceSquared(Vector3 v1, float[] v2, int i)
+        public static float DistanceSquared(RcVec3f v1, float[] v2, int i)
         {
             float dx = v2[i] - v1.X;
             float dy = v2[i + 1] - v1.Y;
@@ -152,13 +151,13 @@ namespace DotRecast.Core.Numerics
         /// If the magnitude is zero, the vector is unchanged.
         /// @param[in,out]	v	The vector to normalize. [(x, y, z)]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 SafeNormalize(Vector3 v)
+        public static RcVec3f SafeNormalize(RcVec3f v)
         {
             float sqMag = RcMath.Sqr(v.X) + RcMath.Sqr(v.Y) + RcMath.Sqr(v.Z);
             if (sqMag > EPSILON)
             {
                 float inverseMag = 1.0f / MathF.Sqrt(sqMag);
-                return new Vector3(
+                return new RcVec3f(
                     v.X *= inverseMag,
                     v.Y *= inverseMag,
                     v.Z *= inverseMag
@@ -169,9 +168,9 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Min(Vector3 v, float[] @in, int i)
+        public static RcVec3f Min(RcVec3f v, float[] @in, int i)
         {
-            return new Vector3(
+            return new RcVec3f(
                 (v.X < @in[i + 0]) ? v.X : @in[i + 0],
                 (v.Y < @in[i + 1]) ? v.Y : @in[i + 1],
                 (v.Z < @in[i + 2]) ? v.Z : @in[i + 2]
@@ -179,9 +178,9 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Max(Vector3 v, float[] @in, int i)
+        public static RcVec3f Max(RcVec3f v, float[] @in, int i)
         {
-            return new Vector3(
+            return new RcVec3f(
                 (v.X > @in[i + 0]) ? v.X : @in[i + 0],
                 (v.Y > @in[i + 1]) ? v.Y : @in[i + 1],
                 (v.Z > @in[i + 2]) ? v.Z : @in[i + 2]
@@ -196,7 +195,7 @@ namespace DotRecast.Core.Numerics
         /// The vectors are projected onto the xz-plane, so the y-values are
         /// ignored.
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Dist2D(Vector3 v1, Vector3 v2)
+        public static float Dist2D(RcVec3f v1, RcVec3f v2)
         {
             float dx = v2.X - v1.X;
             float dz = v2.Z - v1.Z;
@@ -204,7 +203,7 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Dist2DSqr(Vector3 v1, Vector3 v2)
+        public static float Dist2DSqr(RcVec3f v1, RcVec3f v2)
         {
             float dx = v2.X - v1.X;
             float dz = v2.Z - v1.Z;
@@ -212,7 +211,7 @@ namespace DotRecast.Core.Numerics
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Dist2DSqr(Vector3 p, float[] verts, int i)
+        public static float Dist2DSqr(RcVec3f p, float[] verts, int i)
         {
             float dx = verts[i] - p.X;
             float dz = verts[i + 2] - p.Z;
@@ -227,7 +226,7 @@ namespace DotRecast.Core.Numerics
         /// The vectors are projected onto the xz-plane, so the y-values are
         /// ignored.
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Perp2D(Vector3 u, Vector3 v)
+        public static float Perp2D(RcVec3f u, RcVec3f v)
         {
             return u.Z * v.X - u.X * v.Z;
         }
@@ -237,7 +236,7 @@ namespace DotRecast.Core.Numerics
         /// @return True if all of the point's components are finite, i.e. not NaN
         /// or any of the infinities.
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool IsFinite(this Vector3 v)
+        public static bool IsFinite(this RcVec3f v)
         {
             return float.IsFinite(v.X) && float.IsFinite(v.Y) && float.IsFinite(v.Z);
         }
@@ -245,13 +244,13 @@ namespace DotRecast.Core.Numerics
         /// Checks that the specified vector's 2D components are finite.
         /// @param[in] v A point. [(x, y, z)]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool IsFinite2D(this Vector3 v)
+        public static bool IsFinite2D(this RcVec3f v)
         {
             return float.IsFinite(v.X) && float.IsFinite(v.Z);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float PerpXZ(Vector3 a, Vector3 b)
+        public static float PerpXZ(RcVec3f a, RcVec3f b)
         {
             return (a.X * b.Z) - (a.Z * b.X);
         }
@@ -263,9 +262,9 @@ namespace DotRecast.Core.Numerics
         /// @param[in] v2 The destination vector.
         /// @param[in] t The interpolation factor. [Limits: 0 <= value <= 1.0]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Lerp(float[] verts, int v1, int v2, float t)
+        public static RcVec3f Lerp(float[] verts, int v1, int v2, float t)
         {
-            return new Vector3(
+            return new RcVec3f(
                 verts[v1 + 0] + (verts[v2 + 0] - verts[v1 + 0]) * t,
                 verts[v1 + 1] + (verts[v2 + 1] - verts[v1 + 1]) * t,
                 verts[v1 + 2] + (verts[v2 + 2] - verts[v1 + 2]) * t
@@ -278,9 +277,9 @@ namespace DotRecast.Core.Numerics
         /// @param[in] v2 The vector to scale and add to @p v1. [(x, y, z)]
         /// @param[in] s The amount to scale @p v2 by before adding to @p v1.
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static Vector3 Mad(Vector3 v1, Vector3 v2, float s)
+        public static RcVec3f Mad(RcVec3f v1, RcVec3f v2, float s)
         {
-            return new Vector3()
+            return new RcVec3f()
             {
                 X = v1.X + (v2.X * s),
                 Y = v1.Y + (v2.Y * s),

src/DotRecast.Core/RcAnonymousDisposable.cs

@@ -1,20 +0,0 @@
-using System;
-
-namespace DotRecast.Core
-{
-    public struct RcAnonymousDisposable : IDisposable
-    {
-        private Action _dispose;
-
-        public RcAnonymousDisposable(Action dispose)
-        {
-            _dispose = dispose;
-        }
-
-        public void Dispose()
-        {
-            _dispose?.Invoke();
-            _dispose = null;
-        }
-    }
-}

src/DotRecast.Core/RcAtomicLong.cs

@@ -1,8 +1,9 @@
-using System.Threading;
+using System;
+using System.Threading;
 
 namespace DotRecast.Core
 {
-    public class RcAtomicLong
+    public class RcAtomicLong : IComparable<RcAtomicLong>
     {
         private long _location;
 
@@ -15,6 +16,11 @@ namespace DotRecast.Core
             _location = location;
         }
 
+        public int CompareTo(RcAtomicLong other)
+        {
+            return Read().CompareTo(other.Read());
+        }
+
         public long IncrementAndGet()
         {
             return Interlocked.Increment(ref _location);

src/DotRecast.Core/RcContext.cs

@@ -25,21 +25,33 @@ using System.Threading;
 
 namespace DotRecast.Core
 {
-    public class RcTelemetry
+    /// Provides an interface for optional logging and performance tracking of the Recast 
+    /// build process.
+    /// 
+    /// This class does not provide logging or timer functionality on its 
+    /// own.  Both must be provided by a concrete implementation 
+    /// by overriding the protected member functions.  Also, this class does not 
+    /// provide an interface for extracting log messages. (Only adding them.) 
+    /// So concrete implementations must provide one.
+    ///
+    /// If no logging or timers are required, just pass an instance of this 
+    /// class through the Recast build process.
+    /// 
+    /// @ingroup recast
+    public class RcContext
     {
         private readonly ThreadLocal<Dictionary<string, RcAtomicLong>> _timerStart;
         private readonly ConcurrentDictionary<string, RcAtomicLong> _timerAccum;
 
-        public RcTelemetry()
+        public RcContext()
         {
             _timerStart = new ThreadLocal<Dictionary<string, RcAtomicLong>>(() => new Dictionary<string, RcAtomicLong>());
             _timerAccum = new ConcurrentDictionary<string, RcAtomicLong>();
         }
 
-        public IDisposable ScopedTimer(RcTimerLabel label)
+        public RcScopedTimer ScopedTimer(RcTimerLabel label)
         {
-            StartTimer(label);
-            return new RcAnonymousDisposable(() => StopTimer(label));
+            return new RcScopedTimer(this, label);
         }
 
         public void StartTimer(RcTimerLabel label)

src/DotRecast.Core/RcConvexUtils.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Core
 {
@@ -28,7 +27,7 @@ namespace DotRecast.Core
         // Calculates convex hull on xz-plane of points on 'pts',
         // stores the indices of the resulting hull in 'out' and
         // returns number of points on hull.
-        public static List<int> Convexhull(List<Vector3> pts)
+        public static List<int> Convexhull(List<RcVec3f> pts)
         {
             int npts = pts.Count;
             List<int> @out = new List<int>();
@@ -50,9 +49,9 @@ namespace DotRecast.Core
                 endpt = 0;
                 for (int j = 1; j < npts; ++j)
                 {
-                    Vector3 a = pts[hull];
-                    Vector3 b = pts[endpt];
-                    Vector3 c = pts[j];
+                    RcVec3f a = pts[hull];
+                    RcVec3f b = pts[endpt];
+                    RcVec3f c = pts[j];
                     if (hull == endpt || Left(a, b, c))
                     {
                         endpt = j;
@@ -66,7 +65,7 @@ namespace DotRecast.Core
         }
 
         // Returns true if 'a' is more lower-left than 'b'.
-        private static bool Cmppt(Vector3 a, Vector3 b)
+        private static bool Cmppt(RcVec3f a, RcVec3f b)
         {
             if (a.X < b.X)
             {
@@ -92,7 +91,7 @@ namespace DotRecast.Core
         }
 
         // Returns true if 'c' is left of line 'a'-'b'.
-        private static bool Left(Vector3 a, Vector3 b, Vector3 c)
+        private static bool Left(RcVec3f a, RcVec3f b, RcVec3f c)
         {
             float u1 = b.X - a.X;
             float v1 = b.Z - a.Z;

src/DotRecast.Core/RcHashCodes.cs

@@ -1,10 +1,26 @@
-namespace DotRecast.Core
+using System.Runtime.CompilerServices;
+
+namespace DotRecast.Core
 {
     public static class RcHashCodes
     {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static int CombineHashCodes(int h1, int h2)
         {
             return (((h1 << 5) + h1) ^ h2);
         }
+
+        // From Thomas Wang, https://gist.github.com/badboy/6267743
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static uint WangHash(uint a)
+        {
+            a = (~a) + (a << 18); // a = (a << 18) - a - 1;
+            a = a ^ (a >> 31);
+            a = a * 21; // a = (a + (a << 2)) + (a << 4);
+            a = a ^ (a >> 11);
+            a = a + (a << 6);
+            a = a ^ (a >> 22);
+            return (uint)a;
+        }
     }
 }

src/DotRecast.Core/RcIntersections.cs

@@ -20,27 +20,26 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Core
 {
     public static class RcIntersections
     {
-        public static bool IntersectSegmentTriangle(Vector3 sp, Vector3 sq, Vector3 a, Vector3 b, Vector3 c, out float t)
+        public static bool IntersectSegmentTriangle(RcVec3f sp, RcVec3f sq, RcVec3f a, RcVec3f b, RcVec3f c, out float t)
         {
             t = 0;
             float v, w;
-            Vector3 ab = Vector3.Subtract(b, a);
-            Vector3 ac = Vector3.Subtract(c, a);
-            Vector3 qp = Vector3.Subtract(sp, sq);
+            RcVec3f ab = RcVec3f.Subtract(b, a);
+            RcVec3f ac = RcVec3f.Subtract(c, a);
+            RcVec3f qp = RcVec3f.Subtract(sp, sq);
 
             // Compute triangle normal. Can be precalculated or cached if
             // intersecting multiple segments against the same triangle
-            Vector3 norm = Vector3.Cross(ab, ac);
+            RcVec3f norm = RcVec3f.Cross(ab, ac);
 
             // Compute denominator d. If d <= 0, segment is parallel to or points
             // away from triangle, so exit early
-            float d = Vector3.Dot(qp, norm);
+            float d = RcVec3f.Dot(qp, norm);
             if (d <= 0.0f)
             {
                 return false;
@@ -49,8 +48,8 @@ namespace DotRecast.Core
             // Compute intersection t value of pq with plane of triangle. A ray
             // intersects iff 0 <= t. Segment intersects iff 0 <= t <= 1. Delay
             // dividing by d until intersection has been found to pierce triangle
-            Vector3 ap = Vector3.Subtract(sp, a);
-            t = Vector3.Dot(ap, norm);
+            RcVec3f ap = RcVec3f.Subtract(sp, a);
+            t = RcVec3f.Dot(ap, norm);
             if (t < 0.0f)
             {
                 return false;
@@ -62,14 +61,14 @@ namespace DotRecast.Core
             }
 
             // Compute barycentric coordinate components and test if within bounds
-            Vector3 e = Vector3.Cross(qp, ap);
-            v = Vector3.Dot(ac, e);
+            RcVec3f e = RcVec3f.Cross(qp, ap);
+            v = RcVec3f.Dot(ac, e);
             if (v < 0.0f || v > d)
             {
                 return false;
             }
 
-            w = -Vector3.Dot(ab, e);
+            w = -RcVec3f.Dot(ab, e);
             if (w < 0.0f || v + w > d)
             {
                 return false;
@@ -81,11 +80,11 @@ namespace DotRecast.Core
             return true;
         }
 
-        public static bool IsectSegAABB(Vector3 sp, Vector3 sq, Vector3 amin, Vector3 amax, out float tmin, out float tmax)
+        public static bool IsectSegAABB(RcVec3f sp, RcVec3f sq, RcVec3f amin, RcVec3f amax, out float tmin, out float tmax)
         {
             const float EPS = 1e-6f;
 
-            Vector3 d = new Vector3();
+            RcVec3f d = new RcVec3f();
             d.X = sq.X - sp.X;
             d.Y = sq.Y - sp.Y;
             d.Z = sq.Z - sp.Z;

src/DotRecast.Core/RcObjImporter.cs

@@ -21,7 +21,6 @@ using System;
 using System.Globalization;
 using System.IO;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Core
 {
@@ -72,7 +71,7 @@ namespace DotRecast.Core
             }
         }
 
-        private static Vector3 ReadVector3f(string line)
+        private static RcVec3f ReadVector3f(string line)
         {
             string[] v = line.Split(' ', StringSplitOptions.RemoveEmptyEntries);
             if (v.Length < 4)
@@ -81,7 +80,7 @@ namespace DotRecast.Core
             }
 
             // fix - https://github.com/ikpil/DotRecast/issues/7
-            return new Vector3(
+            return new RcVec3f(
                 float.Parse(v[1], CultureInfo.InvariantCulture),
                 float.Parse(v[2], CultureInfo.InvariantCulture),
                 float.Parse(v[3], CultureInfo.InvariantCulture)

src/DotRecast.Core/RcProcess.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotRecast.Core
+{
+    public static class RcProcess
+    {
+        public static void OpenUrl(string url)
+        {
+            try
+            {
+                // OS에 따라 다른 명령 실행
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                {
+                    var psi = new ProcessStartInfo("cmd", $"/c start {url}") { CreateNoWindow = true };
+                    Process.Start(psi);
+                }
+                else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                {
+                    Process.Start("open", url);
+                }
+                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+                {
+                    Process.Start("xdg-open", url);
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"Error opening web browser: {ex.Message}");
+            }
+        }
+    }
+}

src/DotRecast.Core/RcRand.cs

@@ -20,5 +20,10 @@ namespace DotRecast.Core
         {
             return (float)_r.NextDouble();
         }
+
+        public int NextInt32()
+        {
+            return _r.Next();
+        }
     }
 }

src/DotRecast.Core/RcScopedTimer.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace DotRecast.Core
+{
+    public readonly struct RcScopedTimer : IDisposable
+    {
+        private readonly RcContext _context;
+        private readonly RcTimerLabel _label;
+
+        internal RcScopedTimer(RcContext context, RcTimerLabel label)
+        {
+            _context = context;
+            _label = label;
+            
+            _context.StartTimer(_label);
+        }
+
+        public void Dispose()
+        {
+            _context.StopTimer(_label);
+        }
+    }
+}

src/DotRecast.Core/RcSegmentVert.cs

@@ -1,12 +1,11 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Core
 {
     public struct RcSegmentVert
     {
-        public Vector3 vmin;
-        public Vector3 vmax;
+        public RcVec3f vmin;
+        public RcVec3f vmax;
 
         public RcSegmentVert(float v0, float v1, float v2, float v3, float v4, float v5)
         {

src/DotRecast.Core/RcThrowHelper.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Runtime.CompilerServices;
+using DotRecast.Core.Collections;
+
+namespace DotRecast.Core
+{
+    public static class RcThrowHelper
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void ThrowExceptionIfIndexOutOfRange(int index, int size)
+        {
+            if (0 > index || index >= size)
+            {
+                throw new IndexOutOfRangeException($"Index {index} is out of range - size({size})");
+            }
+        }
+        
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static void StackOverflow()
+        {
+            var array_128_512_1 = RcStackArray128<RcStackArray512<float>>.Empty; // 128 * 512 = 65536
+            var array_128_512_2 = RcStackArray128<RcStackArray512<float>>.Empty; // 128 * 512 = 65536
+
+            var array_32_512_1 = RcStackArray32<RcStackArray512<float>>.Empty; // 32 * 512 = 16384
+
+            var array_16_512_1 = RcStackArray16<RcStackArray512<float>>.Empty; // 16 * 512 = 8192
+
+            var array_8_512_1 = RcStackArray8<RcStackArray512<float>>.Empty; // 8 * 512 = 4196
+            var array_4_256_1 = RcStackArray4<RcStackArray256<float>>.Empty; // 4 * 256 = 1024
+            var array_4_64_1 = RcStackArray4<RcStackArray64<float>>.Empty; // 4 * 64 = 256
+        
+            //
+            var array_2_8_1 = RcStackArray2<RcStackArray8<float>>.Empty; // 2 * 8 = 16
+            var array_2_4_1 = RcStackArray2<RcStackArray2<float>>.Empty; // 2 * 2 = 4
+            
+            float f1 = 0.0f; // 1
+            //float f2 = 0.0f; // my system stack overflow!
+        }
+
+ 
+    }
+}

src/DotRecast.Detour.Crowd/DotRecast.Detour.Crowd.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Detour.Crowd</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Detour.Crowd/DtCrowd.cs

@@ -20,164 +20,155 @@ freely, subject to the following restrictions:
 
 using System;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
-
 
 namespace DotRecast.Detour.Crowd
 {
+    ///////////////////////////////////////////////////////////////////////////
+
+// This section contains detailed documentation for members that don't have
+// a source file. It reduces clutter in the main section of the header.
+
     /**
- * Members in this module implement local steering and dynamic avoidance features.
- *
- * The crowd is the big beast of the navigation features. It not only handles a lot of the path management for you, but
- * also local steering and dynamic avoidance between members of the crowd. I.e. It can keep your agents from running
- * into each other.
- *
- * Main class: Crowd
- *
- * The #dtNavMeshQuery and #dtPathCorridor classes provide perfectly good, easy to use path planning features. But in
- * the end they only give you points that your navigation client should be moving toward. When it comes to deciding
- * things like agent velocity and steering to avoid other agents, that is up to you to implement. Unless, of course, you
- * decide to use Crowd.
- *
- * Basically, you add an agent to the crowd, providing various configuration settings such as maximum speed and
- * acceleration. You also provide a local target to move toward. The crowd manager then provides, with every update, the
- * new agent position and velocity for the frame. The movement will be constrained to the navigation mesh, and steering
- * will be applied to ensure agents managed by the crowd do not collide with each other.
- *
- * This is very powerful feature set. But it comes with limitations.
- *
- * The biggest limitation is that you must give control of the agent's position completely over to the crowd manager.
- * You can update things like maximum speed and acceleration. But in order for the crowd manager to do its thing, it
- * can't allow you to constantly be giving it overrides to position and velocity. So you give up direct control of the
- * agent's movement. It belongs to the crowd.
- *
- * The second biggest limitation revolves around the fact that the crowd manager deals with local planning. So the
- * agent's target should never be more than 256 polygons away from its current position. If it is, you risk your agent
- * failing to reach its target. So you may still need to do long distance planning and provide the crowd manager with
- * intermediate targets.
- *
- * Other significant limitations:
- *
- * - All agents using the crowd manager will use the same #dtQueryFilter. - Crowd management is relatively expensive.
- * The maximum agents under crowd management at any one time is between 20 and 30. A good place to start is a maximum of
- * 25 agents for 0.5ms per frame.
- *
- * @note This is a summary list of members. Use the index or search feature to find minor members.
- *
- * @struct dtCrowdAgentParams
- * @see CrowdAgent, Crowd::AddAgent(), Crowd::UpdateAgentParameters()
- *
- * @var dtCrowdAgentParams::obstacleAvoidanceType
- * @par
- *
- * 		#dtCrowd permits agents to use different avoidance configurations. This value is the index of the
- *      #dtObstacleAvoidanceParams within the crowd.
- *
- * @see dtObstacleAvoidanceParams, dtCrowd::SetObstacleAvoidanceParams(), dtCrowd::GetObstacleAvoidanceParams()
- *
- * @var dtCrowdAgentParams::collisionQueryRange
- * @par
- *
- * 		Collision elements include other agents and navigation mesh boundaries.
- *
- *      This value is often based on the agent radius and/or maximum speed. E.g. radius * 8
- *
- * @var dtCrowdAgentParams::pathOptimizationRange
- * @par
- *
- * 		Only applicable if #updateFlags includes the #DT_CROWD_OPTIMIZE_VIS flag.
- *
- *      This value is often based on the agent radius. E.g. radius * 30
- *
- * @see dtPathCorridor::OptimizePathVisibility()
- *
- * @var dtCrowdAgentParams::separationWeight
- * @par
- *
- * 		A higher value will result in agents trying to stay farther away from each other at the cost of more difficult
- *      steering in tight spaces.
- *
- */
-    /**
-     * This is the core class of the refs crowd module. See the refs crowd documentation for a summary of the crowd
-     * features. A common method for setting up the crowd is as follows: -# Allocate the crowd -# Set the avoidance
-     * configurations using #SetObstacleAvoidanceParams(). -# Add agents using #AddAgent() and make an initial movement
-     * request using #RequestMoveTarget(). A common process for managing the crowd is as follows: -# Call #Update() to allow
-     * the crowd to manage its agents. -# Retrieve agent information using #GetActiveAgents(). -# Make movement requests
-     * using #RequestMoveTarget() when movement goal changes. -# Repeat every frame. Some agent configuration settings can
-     * be updated using #UpdateAgentParameters(). But the crowd owns the agent position. So it is not possible to update an
-     * active agent's position. If agent position must be fed back into the crowd, the agent must be removed and re-added.
-     * Notes: - Path related information is available for newly added agents only after an #Update() has been performed. -
-     * Agent objects are kept in a pool and re-used. So it is important when using agent objects to check the value of
-     * #dtCrowdAgent::active to determine if the agent is actually in use or not. - This class is meant to provide 'local'
-     * movement. There is a limit of 256 polygons in the path corridor. So it is not meant to provide automatic pathfinding
-     * services over long distances.
-     *
-     * @see DtAllocCrowd(), DtFreeCrowd(), Init(), dtCrowdAgent
+
+    @defgroup crowd Crowd
+
+    Members in this module implement local steering and dynamic avoidance features.
+
+    The crowd is the big beast of the navigation features. It not only handles a
+    lot of the path management for you, but also local steering and dynamic
+    avoidance between members of the crowd. I.e. It can keep your agents from
+    running into each other.
+
+    Main class: #dtCrowd
+
+    The #dtNavMeshQuery and #dtPathCorridor classes provide perfectly good, easy
+    to use path planning features. But in the end they only give you points that
+    your navigation client should be moving toward. When it comes to deciding things
+    like agent velocity and steering to avoid other agents, that is up to you to
+    implement. Unless, of course, you decide to use #dtCrowd.
+
+    Basically, you add an agent to the crowd, providing various configuration
+    settings such as maximum speed and acceleration. You also provide a local
+    target to more toward. The crowd manager then provides, with every update, the
+    new agent position and velocity for the frame. The movement will be
+    constrained to the navigation mesh, and steering will be applied to ensure
+    agents managed by the crowd do not collide with each other.
+
+    This is very powerful feature set. But it comes with limitations.
+
+    The biggest limitation is that you must give control of the agent's position
+    completely over to the crowd manager. You can update things like maximum speed
+    and acceleration. But in order for the crowd manager to do its thing, it can't
+    allow you to constantly be giving it overrides to position and velocity. So
+    you give up direct control of the agent's movement. It belongs to the crowd.
+
+    The second biggest limitation revolves around the fact that the crowd manager
+    deals with local planning. So the agent's target should never be more than
+    256 polygons aways from its current position. If it is, you risk
+    your agent failing to reach its target. So you may still need to do long
+    distance planning and provide the crowd manager with intermediate targets.
+
+    Other significant limitations:
+
+    - All agents using the crowd manager will use the same #dtQueryFilter.
+    - Crowd management is relatively expensive. The maximum agents under crowd
+      management at any one time is between 20 and 30.  A good place to start
+      is a maximum of 25 agents for 0.5ms per frame.
+
+    @note This is a summary list of members.  Use the index or search
+    feature to find minor members.
+
+    @struct dtCrowdAgentParams
+    @see dtCrowdAgent, dtCrowd::addAgent(), dtCrowd::updateAgentParameters()
+
+    @var dtCrowdAgentParams::obstacleAvoidanceType
+    @par
+
+    #dtCrowd permits agents to use different avoidance configurations.  This value
+    is the index of the #dtObstacleAvoidanceParams within the crowd.
+
+    @see dtObstacleAvoidanceParams, dtCrowd::setObstacleAvoidanceParams(),
+         dtCrowd::getObstacleAvoidanceParams()
+
+    @var dtCrowdAgentParams::collisionQueryRange
+    @par
+
+    Collision elements include other agents and navigation mesh boundaries.
+
+    This value is often based on the agent radius and/or maximum speed. E.g. radius * 8
+
+    @var dtCrowdAgentParams::pathOptimizationRange
+    @par
+
+    Only applicable if #updateFlags includes the #DT_CROWD_OPTIMIZE_VIS flag.
+
+    This value is often based on the agent radius. E.g. radius * 30
+
+    @see dtPathCorridor::optimizePathVisibility()
+
+    @var dtCrowdAgentParams::separationWeight
+    @par
+
+    A higher value will result in agents trying to stay farther away from each other at
+    the cost of more difficult steering in tight spaces.
     */
+    /// Provides local steering behaviors for a group of agents. 
+    /// @ingroup crowd
     public class DtCrowd
     {
-        /// The maximum number of corners a crowd agent will look ahead in the path.
-        /// This value is used for sizing the crowd agent corner buffers.
-        /// Due to the behavior of the crowd manager, the actual number of useful
-        /// corners will be one less than this number.
-        /// @ingroup crowd
-        public const int DT_CROWDAGENT_MAX_CORNERS = 4;
-
-        /// The maximum number of crowd avoidance configurations supported by the
-        /// crowd manager.
-        /// @ingroup crowd
-        /// @see dtObstacleAvoidanceParams, dtCrowd::SetObstacleAvoidanceParams(), dtCrowd::GetObstacleAvoidanceParams(),
-        /// dtCrowdAgentParams::obstacleAvoidanceType
-        public const int DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS = 8;
-
-        /// The maximum number of query filter types supported by the crowd manager.
-        /// @ingroup crowd
-        /// @see dtQueryFilter, dtCrowd::GetFilter() dtCrowd::GetEditableFilter(),
-        /// dtCrowdAgentParams::queryFilterType
-        public const int DT_CROWD_MAX_QUERY_FILTER_TYPE = 16;
-
         private readonly RcAtomicInteger _agentId = new RcAtomicInteger();
         private readonly List<DtCrowdAgent> _agents;
+
         private readonly DtPathQueue _pathQ;
-        private readonly DtObstacleAvoidanceParams[] _obstacleQueryParams = new DtObstacleAvoidanceParams[DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS];
+
+        private readonly DtObstacleAvoidanceParams[] _obstacleQueryParams;
         private readonly DtObstacleAvoidanceQuery _obstacleQuery;
+
         private DtProximityGrid _grid;
-        private readonly Vector3 _ext = new Vector3();
-        private readonly IDtQueryFilter[] _filters = new IDtQueryFilter[DT_CROWD_MAX_QUERY_FILTER_TYPE];
-        private DtNavMeshQuery _navQuery;
-        private DtNavMesh _navMesh;
+
+        private int _maxPathResult;
+        private readonly RcVec3f _agentPlacementHalfExtents;
+
+        private readonly IDtQueryFilter[] _filters;
+
         private readonly DtCrowdConfig _config;
-        private readonly DtCrowdTelemetry _telemetry = new DtCrowdTelemetry();
         private int _velocitySampleCount;
 
-        public DtCrowd(DtCrowdConfig config, DtNavMesh nav) :
-            this(config, nav, i => new DtQueryDefaultFilter())
+        private DtNavMeshQuery _navQuery;
+
+        private DtNavMesh _navMesh;
+        private readonly DtCrowdTelemetry _telemetry = new DtCrowdTelemetry();
+
+        public DtCrowd(DtCrowdConfig config, DtNavMesh nav) : this(config, nav, i => new DtQueryDefaultFilter())
         {
         }
 
         public DtCrowd(DtCrowdConfig config, DtNavMesh nav, Func<int, IDtQueryFilter> queryFilterFactory)
         {
             _config = config;
-            _ext = new Vector3(config.maxAgentRadius * 2.0f, config.maxAgentRadius * 1.5f, config.maxAgentRadius * 2.0f);
+            _agentPlacementHalfExtents = new RcVec3f(config.maxAgentRadius * 2.0f, config.maxAgentRadius * 1.5f, config.maxAgentRadius * 2.0f);
 
             _obstacleQuery = new DtObstacleAvoidanceQuery(config.maxObstacleAvoidanceCircles, config.maxObstacleAvoidanceSegments);
 
-            for (int i = 0; i < DT_CROWD_MAX_QUERY_FILTER_TYPE; i++)
+            _filters = new IDtQueryFilter[DtCrowdConst.DT_CROWD_MAX_QUERY_FILTER_TYPE];
+            for (int i = 0; i < DtCrowdConst.DT_CROWD_MAX_QUERY_FILTER_TYPE; i++)
             {
                 _filters[i] = queryFilterFactory.Invoke(i);
             }
 
             // Init obstacle query option.
-            for (int i = 0; i < DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS; ++i)
+            _obstacleQueryParams = new DtObstacleAvoidanceParams[DtCrowdConst.DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS];
+            for (int i = 0; i < DtCrowdConst.DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS; ++i)
             {
                 _obstacleQueryParams[i] = new DtObstacleAvoidanceParams();
             }
 
             // Allocate temp buffer for merging paths.
+            _maxPathResult = DtCrowdConst.MAX_PATH_RESULT;
             _pathQ = new DtPathQueue(config);
             _agents = new List<DtCrowdAgent>();
 
@@ -207,7 +198,7 @@ namespace DotRecast.Detour.Crowd
         /// @param[in] option The new configuration.
         public void SetObstacleAvoidanceParams(int idx, DtObstacleAvoidanceParams option)
         {
-            if (idx >= 0 && idx < DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS)
+            if (idx >= 0 && idx < DtCrowdConst.DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS)
             {
                 _obstacleQueryParams[idx] = new DtObstacleAvoidanceParams(option);
             }
@@ -219,7 +210,7 @@ namespace DotRecast.Detour.Crowd
         /// @return The requested configuration.
         public DtObstacleAvoidanceParams GetObstacleAvoidanceParams(int idx)
         {
-            if (idx >= 0 && idx < DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS)
+            if (idx >= 0 && idx < DtCrowdConst.DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS)
             {
                 return _obstacleQueryParams[idx];
             }
@@ -235,23 +226,24 @@ namespace DotRecast.Detour.Crowd
             agent.option = option;
         }
 
-        /**
-     * Adds a new agent to the crowd.
-     *
-     * @param pos
-     *            The requested position of the agent. [(x, y, z)]
-     * @param params
-     *            The configuration of the agent.
-     * @return The newly created agent object
-     */
-        public DtCrowdAgent AddAgent(Vector3 pos, DtCrowdAgentParams option)
+        /// @par
+        ///
+        /// The agent's position will be constrained to the surface of the navigation mesh.
+        /// Adds a new agent to the crowd.
+        ///  @param[in]		pos		The requested position of the agent. [(x, y, z)]
+        ///  @param[in]		params	The configuration of the agent.
+        /// @return The index of the agent in the agent pool. Or -1 if the agent could not be added.
+        public DtCrowdAgent AddAgent(RcVec3f pos, DtCrowdAgentParams option)
         {
-            DtCrowdAgent ag = new DtCrowdAgent(_agentId.GetAndIncrement());
+            int idx = _agentId.GetAndIncrement();
+            DtCrowdAgent ag = new DtCrowdAgent(idx);
+            ag.corridor.Init(_maxPathResult);
             _agents.Add(ag);
+
             UpdateAgentParameters(ag, option);
 
             // Find nearest position on navmesh and place the agent there.
-            var status = _navQuery.FindNearestPoly(pos, _ext, _filters[ag.option.queryFilterType], out var refs, out var nearestPt, out var _);
+            var status = _navQuery.FindNearestPoly(pos, _agentPlacementHalfExtents, _filters[ag.option.queryFilterType], out var refs, out var nearestPt, out var _);
             if (status.Failed())
             {
                 nearestPt = pos;
@@ -265,9 +257,9 @@ namespace DotRecast.Detour.Crowd
             ag.topologyOptTime = 0;
             ag.targetReplanTime = 0;
 
-            ag.dvel = Vector3.Zero;
-            ag.nvel = Vector3.Zero;
-            ag.vel = Vector3.Zero;
+            ag.dvel = RcVec3f.Zero;
+            ag.nvel = RcVec3f.Zero;
+            ag.vel = RcVec3f.Zero;
             ag.npos = nearestPt;
 
             ag.desiredSpeed = 0;
@@ -297,7 +289,7 @@ namespace DotRecast.Detour.Crowd
             _agents.Remove(agent);
         }
 
-        private bool RequestMoveTargetReplan(DtCrowdAgent ag, long refs, Vector3 pos)
+        private bool RequestMoveTargetReplan(DtCrowdAgent ag, long refs, RcVec3f pos)
         {
             ag.SetTarget(refs, pos);
             ag.targetReplan = true;
@@ -315,7 +307,7 @@ namespace DotRecast.Detour.Crowd
         /// The position will be constrained to the surface of the navigation mesh.
         ///
         /// The request will be processed during the next #Update().
-        public bool RequestMoveTarget(DtCrowdAgent agent, long refs, Vector3 pos)
+        public bool RequestMoveTarget(DtCrowdAgent agent, long refs, RcVec3f pos)
         {
             if (refs == 0)
             {
@@ -332,7 +324,7 @@ namespace DotRecast.Detour.Crowd
         /// @param[in] idx The agent index. [Limits: 0 <= value < #GetAgentCount()]
         /// @param[in] vel The movement velocity. [(x, y, z)]
         /// @return True if the request was successfully submitted.
-        public bool RequestMoveVelocity(DtCrowdAgent agent, Vector3 vel)
+        public bool RequestMoveVelocity(DtCrowdAgent agent, RcVec3f vel)
         {
             // Initialize request.
             agent.targetRef = 0;
@@ -351,8 +343,8 @@ namespace DotRecast.Detour.Crowd
         {
             // Initialize request.
             agent.targetRef = 0;
-            agent.targetPos = Vector3.Zero;
-            agent.dvel = Vector3.Zero;
+            agent.targetPos = RcVec3f.Zero;
+            agent.dvel = RcVec3f.Zero;
             agent.targetPathQueryResult = null;
             agent.targetReplan = false;
             agent.targetState = DtMoveRequestState.DT_CROWDAGENT_TARGET_NONE;
@@ -369,14 +361,14 @@ namespace DotRecast.Detour.Crowd
             return _agents;
         }
 
-        public Vector3 GetQueryExtents()
+        public RcVec3f GetQueryExtents()
         {
-            return _ext;
+            return _agentPlacementHalfExtents;
         }
 
         public IDtQueryFilter GetFilter(int i)
         {
-            return i >= 0 && i < DT_CROWD_MAX_QUERY_FILTER_TYPE ? _filters[i] : null;
+            return i >= 0 && i < DtCrowdConst.DT_CROWD_MAX_QUERY_FILTER_TYPE ? _filters[i] : null;
         }
 
         public DtProximityGrid GetGrid()
@@ -452,8 +444,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.CheckPathValidity);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -464,14 +457,14 @@ namespace DotRecast.Detour.Crowd
                 bool replan = false;
 
                 // First check that the current location is valid.
-                Vector3 agentPos = new Vector3();
+                RcVec3f agentPos = new RcVec3f();
                 long agentRef = ag.corridor.GetFirstPoly();
                 agentPos = ag.npos;
                 if (!_navQuery.IsValidPolyRef(agentRef, _filters[ag.option.queryFilterType]))
                 {
                     // Current location is not valid, try to reposition.
                     // TODO: this can snap agents, how to handle that?
-                    _navQuery.FindNearestPoly(ag.npos, _ext, _filters[ag.option.queryFilterType], out agentRef, out var nearestPt, out var _);
+                    _navQuery.FindNearestPoly(ag.npos, _agentPlacementHalfExtents, _filters[ag.option.queryFilterType], out agentRef, out var nearestPt, out var _);
                     agentPos = nearestPt;
 
                     if (agentRef == 0)
@@ -511,7 +504,7 @@ namespace DotRecast.Detour.Crowd
                     if (!_navQuery.IsValidPolyRef(ag.targetRef, _filters[ag.option.queryFilterType]))
                     {
                         // Current target is not valid, try to reposition.
-                        _navQuery.FindNearestPoly(ag.targetPos, _ext, _filters[ag.option.queryFilterType], out ag.targetRef, out var nearestPt, out var _);
+                        _navQuery.FindNearestPoly(ag.targetPos, _agentPlacementHalfExtents, _filters[ag.option.queryFilterType], out ag.targetRef, out var nearestPt, out var _);
                         ag.targetPos = nearestPt;
                         replan = true;
                     }
@@ -535,8 +528,7 @@ namespace DotRecast.Detour.Crowd
                     replan = true;
                 }
 
-                // If the end of the path is near and it is not the requested
-                // location, replan.
+                // If the end of the path is near and it is not the requested location, replan.
                 if (ag.targetState == DtMoveRequestState.DT_CROWDAGENT_TARGET_VALID)
                 {
                     if (ag.targetReplanTime > _config.targetReplanDelay && ag.corridor.GetPathCount() < _config.checkLookAhead
@@ -565,8 +557,9 @@ namespace DotRecast.Detour.Crowd
 
             // Fire off new requests.
             List<long> reqPath = new List<long>();
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state == DtCrowdAgentState.DT_CROWDAGENT_STATE_INVALID)
                 {
                     continue;
@@ -604,7 +597,7 @@ namespace DotRecast.Detour.Crowd
                         status = _navQuery.FinalizeSlicedFindPath(ref reqPath);
                     }
 
-                    Vector3 reqPos = new Vector3();
+                    RcVec3f reqPos = new RcVec3f();
                     if (status.Succeeded() && reqPath.Count > 0)
                     {
                         // In progress or succeed.
@@ -678,8 +671,9 @@ namespace DotRecast.Detour.Crowd
             }
 
             // Process path results.
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.targetState == DtMoveRequestState.DT_CROWDAGENT_TARGET_NONE
                     || ag.targetState == DtMoveRequestState.DT_CROWDAGENT_TARGET_VELOCITY)
                 {
@@ -817,8 +811,9 @@ namespace DotRecast.Detour.Crowd
 
             RcSortedQueue<DtCrowdAgent> queue = new RcSortedQueue<DtCrowdAgent>((a1, a2) => a2.topologyOptTime.CompareTo(a1.topologyOptTime));
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -856,9 +851,10 @@ namespace DotRecast.Detour.Crowd
 
             _grid = new DtProximityGrid(_config.maxAgentRadius * 3);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
-                Vector3 p = ag.npos;
+                var ag = agents[i];
+                RcVec3f p = ag.npos;
                 float r = ag.option.radius;
                 _grid.AddItem(ag, p.X - r, p.Z - r, p.X + r, p.Z + r);
             }
@@ -868,8 +864,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.BuildNeighbours);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -891,21 +888,23 @@ namespace DotRecast.Detour.Crowd
         }
 
 
-        private int GetNeighbours(Vector3 pos, float height, float range, DtCrowdAgent skip, ref List<DtCrowdNeighbour> result, DtProximityGrid grid)
+        private int GetNeighbours(RcVec3f pos, float height, float range, DtCrowdAgent skip, ref List<DtCrowdNeighbour> result, DtProximityGrid grid)
         {
             result.Clear();
 
-            var proxAgents = new HashSet<DtCrowdAgent>();
-            int nids = grid.QueryItems(pos.X - range, pos.Z - range, pos.X + range, pos.Z + range, ref proxAgents);
-            foreach (DtCrowdAgent ag in proxAgents)
+            int MAX_NEIS = 32;
+            var ids = new DtCrowdAgent[MAX_NEIS];
+            int nids = grid.QueryItems(pos.X - range, pos.Z - range, pos.X + range, pos.Z + range, ids, ids.Length);
+            for (int i = 0; i < nids; ++i)
             {
+                var ag = ids[i];
                 if (ag == skip)
                 {
                     continue;
                 }
 
                 // Check for overlap.
-                Vector3 diff = Vector3.Subtract(pos, ag.npos);
+                RcVec3f diff = RcVec3f.Subtract(pos, ag.npos);
                 if (MathF.Abs(diff.Y) >= (height + ag.option.height) / 2.0f)
                 {
                     continue;
@@ -930,8 +929,9 @@ namespace DotRecast.Detour.Crowd
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.FindCorners);
 
             DtCrowdAgent debugAgent = debug != null ? debug.agent : null;
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -944,13 +944,13 @@ namespace DotRecast.Detour.Crowd
                 }
 
                 // Find corners for steering
-                ag.corridor.FindCorners(ref ag.corners, DT_CROWDAGENT_MAX_CORNERS, _navQuery, _filters[ag.option.queryFilterType]);
+                ag.corridor.FindCorners(ref ag.corners, DtCrowdConst.DT_CROWDAGENT_MAX_CORNERS, _navQuery, _filters[ag.option.queryFilterType]);
 
                 // Check to see if the corner after the next corner is directly visible,
                 // and short cut to there.
                 if ((ag.option.updateFlags & DtCrowdAgentUpdateFlags.DT_CROWD_OPTIMIZE_VIS) != 0 && ag.corners.Count > 0)
                 {
-                    Vector3 target = ag.corners[Math.Min(1, ag.corners.Count - 1)].pos;
+                    RcVec3f target = ag.corners[Math.Min(1, ag.corners.Count - 1)].pos;
                     ag.corridor.OptimizePathVisibility(target, ag.option.pathOptimizationRange, _navQuery,
                         _filters[ag.option.queryFilterType]);
 
@@ -966,8 +966,8 @@ namespace DotRecast.Detour.Crowd
                     // Copy data for debug purposes.
                     if (debugAgent == ag)
                     {
-                        debug.optStart = Vector3.Zero;
-                        debug.optEnd = Vector3.Zero;
+                        debug.optStart = RcVec3f.Zero;
+                        debug.optEnd = RcVec3f.Zero;
                     }
                 }
             }
@@ -977,8 +977,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.TriggerOffMeshConnections);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -1025,8 +1026,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.CalculateSteering);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -1037,7 +1039,7 @@ namespace DotRecast.Detour.Crowd
                     continue;
                 }
 
-                Vector3 dvel = new Vector3();
+                RcVec3f dvel = new RcVec3f();
 
                 if (ag.targetState == DtMoveRequestState.DT_CROWDAGENT_TARGET_VELOCITY)
                 {
@@ -1072,13 +1074,13 @@ namespace DotRecast.Detour.Crowd
                     float separationWeight = ag.option.separationWeight;
 
                     float w = 0;
-                    Vector3 disp = new Vector3();
+                    RcVec3f disp = new RcVec3f();
 
                     for (int j = 0; j < ag.neis.Count; ++j)
                     {
                         DtCrowdAgent nei = ag.neis[j].agent;
 
-                        Vector3 diff = Vector3.Subtract(ag.npos, nei.npos);
+                        RcVec3f diff = RcVec3f.Subtract(ag.npos, nei.npos);
                         diff.Y = 0;
 
                         float distSqr = diff.LengthSquared();
@@ -1123,8 +1125,9 @@ namespace DotRecast.Detour.Crowd
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.PlanVelocity);
 
             DtCrowdAgent debugAgent = debug != null ? debug.agent : null;
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -1144,9 +1147,9 @@ namespace DotRecast.Detour.Crowd
                     // Append neighbour segments as obstacles.
                     for (int j = 0; j < ag.boundary.GetSegmentCount(); ++j)
                     {
-                        Vector3[] s = ag.boundary.GetSegment(j);
-                        Vector3 s3 = s[1];
-                        //RcArray.Copy(s, 3, s3, 0, 3);
+                        RcVec3f[] s = ag.boundary.GetSegment(j);
+                        RcVec3f s3 = s[1];
+                        //RcArrays.Copy(s, 3, s3, 0, 3);
                         if (DtUtils.TriArea2D(ag.npos, s[0], s3) < 0.0f)
                         {
                             continue;
@@ -1192,8 +1195,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.Integrate);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -1209,15 +1213,16 @@ namespace DotRecast.Detour.Crowd
 
             for (int iter = 0; iter < 4; ++iter)
             {
-                foreach (DtCrowdAgent ag in agents)
+                for (var i = 0; i < agents.Count; i++)
                 {
+                    var ag = agents[i];
                     long idx0 = ag.idx;
                     if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                     {
                         continue;
                     }
 
-                    ag.disp = Vector3.Zero;
+                    ag.disp = RcVec3f.Zero;
 
                     float w = 0;
 
@@ -1225,7 +1230,7 @@ namespace DotRecast.Detour.Crowd
                     {
                         DtCrowdAgent nei = ag.neis[j].agent;
                         long idx1 = nei.idx;
-                        Vector3 diff = Vector3.Subtract(ag.npos, nei.npos);
+                        RcVec3f diff = RcVec3f.Subtract(ag.npos, nei.npos);
                         diff.Y = 0;
 
                         float dist = diff.LengthSquared();
@@ -1241,11 +1246,11 @@ namespace DotRecast.Detour.Crowd
                             // Agents on top of each other, try to choose diverging separation directions.
                             if (idx0 > idx1)
                             {
-                                diff = new Vector3(-ag.dvel.Z, 0, ag.dvel.X);
+                                diff = new RcVec3f(-ag.dvel.Z, 0, ag.dvel.X);
                             }
                             else
                             {
-                                diff = new Vector3(ag.dvel.Z, 0, -ag.dvel.X);
+                                diff = new RcVec3f(ag.dvel.Z, 0, -ag.dvel.X);
                             }
 
                             pen = 0.01f;
@@ -1267,14 +1272,15 @@ namespace DotRecast.Detour.Crowd
                     }
                 }
 
-                foreach (DtCrowdAgent ag in agents)
+                for (var i = 0; i < agents.Count; i++)
                 {
+                    var ag = agents[i];
                     if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                     {
                         continue;
                     }
 
-                    ag.npos = Vector3.Add(ag.npos, ag.disp);
+                    ag.npos = RcVec3f.Add(ag.npos, ag.disp);
                 }
             }
         }
@@ -1283,8 +1289,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.MoveAgents);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 if (ag.state != DtCrowdAgentState.DT_CROWDAGENT_STATE_WALKING)
                 {
                     continue;
@@ -1309,8 +1316,9 @@ namespace DotRecast.Detour.Crowd
         {
             using var timer = _telemetry.ScopedTimer(DtCrowdTimerLabel.UpdateOffMeshConnections);
 
-            foreach (DtCrowdAgent ag in agents)
+            for (var i = 0; i < agents.Count; i++)
             {
+                var ag = agents[i];
                 DtCrowdAgentAnimation anim = ag.animation;
                 if (!anim.active)
                 {
@@ -1333,17 +1341,17 @@ namespace DotRecast.Detour.Crowd
                 if (anim.t < ta)
                 {
                     float u = Tween(anim.t, 0.0f, ta);
-                    ag.npos = Vector3.Lerp(anim.initPos, anim.startPos, u);
+                    ag.npos = RcVec3f.Lerp(anim.initPos, anim.startPos, u);
                 }
                 else
                 {
                     float u = Tween(anim.t, ta, tb);
-                    ag.npos = Vector3.Lerp(anim.startPos, anim.endPos, u);
+                    ag.npos = RcVec3f.Lerp(anim.startPos, anim.endPos, u);
                 }
 
                 // Update velocity.
-                ag.vel = Vector3.Zero;
-                ag.dvel = Vector3.Zero;
+                ag.vel = RcVec3f.Zero;
+                ag.dvel = RcVec3f.Zero;
             }
         }
 

src/DotRecast.Detour.Crowd/DtCrowdAgent.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
@@ -34,8 +33,7 @@ namespace DotRecast.Detour.Crowd
         /// The type of mesh polygon the agent is traversing. (See: #CrowdAgentState)
         public DtCrowdAgentState state;
 
-        /// True if the agent has valid path (targetState == DT_CROWDAGENT_TARGET_VALID) and the path does not lead to the
-        /// requested position, else false.
+        /// True if the agent has valid path (targetState == DT_CROWDAGENT_TARGET_VALID) and the path does not lead to the requested position, else false.
         public bool partial;
 
         /// The path corridor the agent is using.
@@ -53,51 +51,24 @@ namespace DotRecast.Detour.Crowd
         /// The desired speed.
         public float desiredSpeed;
 
-        public Vector3 npos = new Vector3();
+        public RcVec3f npos = new RcVec3f(); // < The current agent position. [(x, y, z)]
+        public RcVec3f disp = new RcVec3f(); // < A temporary value used to accumulate agent displacement during iterative collision resolution. [(x, y, z)]
+        public RcVec3f dvel = new RcVec3f(); // < The desired velocity of the agent. Based on the current path, calculated from scratch each frame. [(x, y, z)]
+        public RcVec3f nvel = new RcVec3f(); // < The desired velocity adjusted by obstacle avoidance, calculated from scratch each frame. [(x, y, z)]
+        public RcVec3f vel = new RcVec3f(); // < The actual velocity of the agent. The change from nvel -> vel is constrained by max acceleration. [(x, y, z)]
 
-        /// < The current agent position. [(x, y, z)]
-        public Vector3 disp = new Vector3();
-
-        /// < A temporary value used to accumulate agent displacement during iterative
-        /// collision resolution. [(x, y, z)]
-        public Vector3 dvel = new Vector3();
-
-        /// < The desired velocity of the agent. Based on the current path, calculated
-        /// from
-        /// scratch each frame. [(x, y, z)]
-        public Vector3 nvel = new Vector3();
-
-        /// < The desired velocity adjusted by obstacle avoidance, calculated from scratch each
-        /// frame. [(x, y, z)]
-        public Vector3 vel = new Vector3();
-
-        /// < The actual velocity of the agent. The change from nvel -> vel is
-        /// constrained by max acceleration. [(x, y, z)]
         /// The agent's configuration parameters.
         public DtCrowdAgentParams option;
 
         /// The local path corridor corners for the agent.
         public List<DtStraightPath> corners = new List<DtStraightPath>();
 
-        public DtMoveRequestState targetState;
-
-        /// < State of the movement request.
-        public long targetRef;
-
-        /// < Target polyref of the movement request.
-        public Vector3 targetPos = new Vector3();
-
-        /// < Target position of the movement request (or velocity in case of
-        /// DT_CROWDAGENT_TARGET_VELOCITY).
-        public DtPathQueryResult targetPathQueryResult;
-
-        /// < Path finder query
-        public bool targetReplan;
-
-        /// < Flag indicating that the current path is being replanned.
-        public float targetReplanTime;
-
-        /// <Time since the agent's target was replanned.
+        public DtMoveRequestState targetState; // < State of the movement request.
+        public long targetRef; // < Target polyref of the movement request.
+        public RcVec3f targetPos = new RcVec3f(); // < Target position of the movement request (or velocity in case of DT_CROWDAGENT_TARGET_VELOCITY).
+        public DtPathQueryResult targetPathQueryResult; // < Path finder query
+        public bool targetReplan; // < Flag indicating that the current path is being replanned.
+        public float targetReplanTime; // <Time since the agent's target was replanned.
         public float targetReplanWaitTime;
 
         public DtCrowdAgentAnimation animation;
@@ -114,17 +85,17 @@ namespace DotRecast.Detour.Crowd
         {
             // Fake dynamic constraint.
             float maxDelta = option.maxAcceleration * dt;
-            Vector3 dv = Vector3.Subtract(nvel, vel);
+            RcVec3f dv = RcVec3f.Subtract(nvel, vel);
             float ds = dv.Length();
             if (ds > maxDelta)
                 dv = dv.Scale(maxDelta / ds);
-            vel = Vector3.Add(vel, dv);
+            vel = RcVec3f.Add(vel, dv);
 
             // Integrate
             if (vel.Length() > 0.0001f)
                 npos = RcVecUtils.Mad(npos, vel, dt);
             else
-                vel = Vector3.Zero;
+                vel = RcVec3f.Zero;
         }
 
         public bool OverOffmeshConnection(float radius)
@@ -158,9 +129,9 @@ namespace DotRecast.Detour.Crowd
             return range;
         }
 
-        public Vector3 CalcSmoothSteerDirection()
+        public RcVec3f CalcSmoothSteerDirection()
         {
-            Vector3 dir = new Vector3();
+            RcVec3f dir = new RcVec3f();
             if (0 < corners.Count)
             {
                 int ip0 = 0;
@@ -168,8 +139,8 @@ namespace DotRecast.Detour.Crowd
                 var p0 = corners[ip0].pos;
                 var p1 = corners[ip1].pos;
 
-                var dir0 = Vector3.Subtract(p0, npos);
-                var dir1 = Vector3.Subtract(p1, npos);
+                var dir0 = RcVec3f.Subtract(p0, npos);
+                var dir1 = RcVec3f.Subtract(p1, npos);
                 dir0.Y = 0;
                 dir1.Y = 0;
 
@@ -181,26 +152,26 @@ namespace DotRecast.Detour.Crowd
                 dir.X = dir0.X - dir1.X * len0 * 0.5f;
                 dir.Y = 0;
                 dir.Z = dir0.Z - dir1.Z * len0 * 0.5f;
-                dir = Vector3.Normalize(dir);
+                dir = RcVec3f.Normalize(dir);
             }
 
             return dir;
         }
 
-        public Vector3 CalcStraightSteerDirection()
+        public RcVec3f CalcStraightSteerDirection()
         {
-            Vector3 dir = new Vector3();
+            RcVec3f dir = new RcVec3f();
             if (0 < corners.Count)
             {
-                dir = Vector3.Subtract(corners[0].pos, npos);
+                dir = RcVec3f.Subtract(corners[0].pos, npos);
                 dir.Y = 0;
-                dir = Vector3.Normalize(dir);
+                dir = RcVec3f.Normalize(dir);
             }
 
             return dir;
         }
 
-        public void SetTarget(long refs, Vector3 pos)
+        public void SetTarget(long refs, RcVec3f pos)
         {
             targetRef = refs;
             targetPos = pos;

src/DotRecast.Detour.Crowd/DtCrowdAgentAnimation.cs

@@ -19,16 +19,15 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
     public class DtCrowdAgentAnimation
     {
         public bool active;
-        public Vector3 initPos = new Vector3();
-        public Vector3 startPos = new Vector3();
-        public Vector3 endPos = new Vector3();
+        public RcVec3f initPos = new RcVec3f();
+        public RcVec3f startPos = new RcVec3f();
+        public RcVec3f endPos = new RcVec3f();
         public long polyRef;
         public float t, tmax;
     }

src/DotRecast.Detour.Crowd/DtCrowdAgentDebugInfo.cs

@@ -19,15 +19,14 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
     public class DtCrowdAgentDebugInfo
     {
         public DtCrowdAgent agent;
-        public Vector3 optStart = new Vector3();
-        public Vector3 optEnd = new Vector3();
+        public RcVec3f optStart = new RcVec3f();
+        public RcVec3f optEnd = new RcVec3f();
         public DtObstacleAvoidanceDebugData vod;
     }
 }

src/DotRecast.Detour.Crowd/DtCrowdConfig.cs

@@ -23,52 +23,16 @@ namespace DotRecast.Detour.Crowd
     {
         public readonly float maxAgentRadius;
 
-        /**
-     * Max number of path requests in the queue
-     */
-        public int pathQueueSize = 32;
-
-        /**
-     * Max number of sliced path finding iterations executed per update (used to handle longer paths and replans)
-     */
-        public int maxFindPathIterations = 100;
-
-        /**
-     * Max number of sliced path finding iterations executed per agent to find the initial path to target
-     */
-        public int maxTargetFindPathIterations = 20;
-
-        /**
-     * Min time between topology optimizations (in seconds)
-     */
-        public float topologyOptimizationTimeThreshold = 0.5f;
-
-        /**
-     * The number of polygons from the beginning of the corridor to check to ensure path validity
-     */
-        public int checkLookAhead = 10;
-
-        /**
-     * Min time between target re-planning (in seconds)
-     */
-        public float targetReplanDelay = 1.0f;
-
-        /**
-     * Max number of sliced path finding iterations executed per topology optimization per agent
-     */
-        public int maxTopologyOptimizationIterations = 32;
-
+        public int pathQueueSize = 32; // Max number of path requests in the queue
+        public int maxFindPathIterations = 100; // Max number of sliced path finding iterations executed per update (used to handle longer paths and replans)
+        public int maxTargetFindPathIterations = 20; // Max number of sliced path finding iterations executed per agent to find the initial path to target
+        public float topologyOptimizationTimeThreshold = 0.5f; // Min time between topology optimizations (in seconds)
+        public int checkLookAhead = 10; // The number of polygons from the beginning of the corridor to check to ensure path validity
+        public float targetReplanDelay = 1.0f; // Min time between target re-planning (in seconds)
+        public int maxTopologyOptimizationIterations = 32; // Max number of sliced path finding iterations executed per topology optimization per agent
         public float collisionResolveFactor = 0.7f;
-
-        /**
-     * Max number of neighbour agents to consider in obstacle avoidance processing
-     */
-        public int maxObstacleAvoidanceCircles = 6;
-
-        /**
-     * Max number of neighbour segments to consider in obstacle avoidance processing
-     */
-        public int maxObstacleAvoidanceSegments = 8;
+        public int maxObstacleAvoidanceCircles = 6; // Max number of neighbour agents to consider in obstacle avoidance processing
+        public int maxObstacleAvoidanceSegments = 8; // Max number of neighbour segments to consider in obstacle avoidance processing
 
         public DtCrowdConfig(float maxAgentRadius)
         {

src/DotRecast.Detour.Crowd/DtCrowdConst.cs

@@ -0,0 +1,35 @@
+namespace DotRecast.Detour.Crowd
+{
+    public static class DtCrowdConst
+    {
+        /// The maximum number of neighbors that a crowd agent can take into account
+        /// for steering decisions.
+        /// @ingroup crowd
+        public const int DT_CROWDAGENT_MAX_NEIGHBOURS = 6;
+        
+        /// The maximum number of corners a crowd agent will look ahead in the path.
+        /// This value is used for sizing the crowd agent corner buffers.
+        /// Due to the behavior of the crowd manager, the actual number of useful
+        /// corners will be one less than this number.
+        /// @ingroup crowd
+        public const int DT_CROWDAGENT_MAX_CORNERS = 4;
+
+        /// The maximum number of crowd avoidance configurations supported by the
+        /// crowd manager.
+        /// @ingroup crowd
+        /// @see dtObstacleAvoidanceParams, dtCrowd::SetObstacleAvoidanceParams(), dtCrowd::GetObstacleAvoidanceParams(),
+        /// dtCrowdAgentParams::obstacleAvoidanceType
+        public const int DT_CROWD_MAX_OBSTAVOIDANCE_PARAMS = 8;
+
+        /// The maximum number of query filter types supported by the crowd manager.
+        /// @ingroup crowd
+        /// @see dtQueryFilter, dtCrowd::GetFilter() dtCrowd::GetEditableFilter(),
+        /// dtCrowdAgentParams::queryFilterType
+        public const int DT_CROWD_MAX_QUERY_FILTER_TYPE = 16;
+        
+        public const int MAX_ITERS_PER_UPDATE = 100;
+        public const int MAX_PATHQUEUE_NODES = 4096;
+        public const int MAX_COMMON_NODES = 512;
+        public const int MAX_PATH_RESULT = 256;
+    }
+}

src/DotRecast.Detour.Crowd/DtCrowdScopedTimer.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace DotRecast.Detour.Crowd
+{
+    internal readonly struct DtCrowdScopedTimer : IDisposable
+    {
+        private readonly DtCrowdTimerLabel _label;
+        private readonly DtCrowdTelemetry _telemetry;
+
+        internal DtCrowdScopedTimer(DtCrowdTelemetry telemetry, DtCrowdTimerLabel label)
+        {
+            _telemetry = telemetry;
+            _label = label;
+
+            _telemetry.Start(_label);
+        }
+
+        public void Dispose()
+        {
+            _telemetry.Stop(_label);
+        }
+    }
+}

src/DotRecast.Detour.Crowd/DtCrowdTelemetry.cs

@@ -19,12 +19,9 @@ freely, subject to the following restrictions:
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
-using System.Reflection.Emit;
 using DotRecast.Core;
-using DotRecast.Core.Numerics;
-using System.Numerics;
+using DotRecast.Core.Buffers;
 
 namespace DotRecast.Detour.Crowd
 {
@@ -35,7 +32,7 @@ namespace DotRecast.Detour.Crowd
         private float _maxTimeToFindPath;
 
         private readonly Dictionary<DtCrowdTimerLabel, long> _executionTimings = new Dictionary<DtCrowdTimerLabel, long>();
-        private readonly Dictionary<DtCrowdTimerLabel, List<long>> _executionTimingSamples = new Dictionary<DtCrowdTimerLabel, List<long>>();
+        private readonly Dictionary<DtCrowdTimerLabel, RcCyclicBuffer<long>> _executionTimingSamples = new Dictionary<DtCrowdTimerLabel, RcCyclicBuffer<long>>();
 
         public float MaxTimeToEnqueueRequest()
         {
@@ -72,33 +69,27 @@ namespace DotRecast.Detour.Crowd
             _maxTimeToFindPath = Math.Max(_maxTimeToFindPath, time);
         }
 
-        public IDisposable ScopedTimer(DtCrowdTimerLabel label)
+        internal DtCrowdScopedTimer ScopedTimer(DtCrowdTimerLabel label)
         {
-            Start(label);
-            return new RcAnonymousDisposable(() => Stop(label));
+            return new DtCrowdScopedTimer(this, label);
         }
 
-        private void Start(DtCrowdTimerLabel name)
+        internal void Start(DtCrowdTimerLabel name)
         {
             _executionTimings.Add(name, RcFrequency.Ticks);
         }
 
-        private void Stop(DtCrowdTimerLabel name)
+        internal void Stop(DtCrowdTimerLabel name)
         {
             long duration = RcFrequency.Ticks - _executionTimings[name];
-            if (!_executionTimingSamples.TryGetValue(name, out var s))
+            if (!_executionTimingSamples.TryGetValue(name, out var cb))
             {
-                s = new List<long>();
-                _executionTimingSamples.Add(name, s);
+                cb = new RcCyclicBuffer<long>(TIMING_SAMPLES);
+                _executionTimingSamples.Add(name, cb);
             }
 
-            if (s.Count == TIMING_SAMPLES)
-            {
-                s.RemoveAt(0);
-            }
-
-            s.Add(duration);
-            _executionTimings[name] = (long)s.Average();
+            cb.PushBack(duration);
+            _executionTimings[name] = (long)cb.Average();
         }
     }
 }

src/DotRecast.Detour.Crowd/DtLocalBoundary.cs

@@ -21,18 +21,15 @@ freely, subject to the following restrictions:
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 
 namespace DotRecast.Detour.Crowd
 {
-    
-
     public class DtLocalBoundary
     {
         public const int MAX_LOCAL_SEGS = 8;
 
-        private Vector3 m_center = new Vector3();
+        private RcVec3f m_center = new RcVec3f();
         private List<DtSegment> m_segs = new List<DtSegment>();
         private List<long> m_polys = new List<long>();
         private List<long> m_parents = new List<long>();
@@ -91,7 +88,7 @@ namespace DotRecast.Detour.Crowd
             }
         }
 
-        public void Update(long startRef, Vector3 pos, float collisionQueryRange, DtNavMeshQuery navquery, IDtQueryFilter filter)
+        public void Update(long startRef, RcVec3f pos, float collisionQueryRange, DtNavMeshQuery navquery, IDtQueryFilter filter)
         {
             if (startRef == 0)
             {
@@ -155,12 +152,12 @@ namespace DotRecast.Detour.Crowd
             return true;
         }
 
-        public Vector3 GetCenter()
+        public RcVec3f GetCenter()
         {
             return m_center;
         }
 
-        public Vector3[] GetSegment(int j)
+        public RcVec3f[] GetSegment(int j)
         {
             return m_segs[j].s;
         }

src/DotRecast.Detour.Crowd/DtObstacleAvoidanceDebugData.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
@@ -79,7 +78,7 @@ namespace DotRecast.Detour.Crowd
             NormalizeArray(m_tpen, m_nsamples);
         }
 
-        public void AddSample(Vector3 vel, float ssize, float pen, float vpen, float vcpen, float spen, float tpen)
+        public void AddSample(RcVec3f vel, float ssize, float pen, float vpen, float vcpen, float spen, float tpen)
         {
             if (m_nsamples >= m_maxSamples)
                 return;
@@ -100,9 +99,9 @@ namespace DotRecast.Detour.Crowd
             return m_nsamples;
         }
 
-        public Vector3 GetSampleVelocity(int i)
+        public RcVec3f GetSampleVelocity(int i)
         {
-            Vector3 vel = new Vector3();
+            RcVec3f vel = new RcVec3f();
             vel.X = m_vel[i * 3];
             vel.Y = m_vel[i * 3 + 1];
             vel.Z = m_vel[i * 3 + 2];

src/DotRecast.Detour.Crowd/DtObstacleAvoidanceQuery.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 
 namespace DotRecast.Detour.Crowd
@@ -72,7 +71,7 @@ namespace DotRecast.Detour.Crowd
             m_nsegments = 0;
         }
 
-        public void AddCircle(Vector3 pos, float rad, Vector3 vel, Vector3 dvel)
+        public void AddCircle(RcVec3f pos, float rad, RcVec3f vel, RcVec3f dvel)
         {
             if (m_ncircles >= m_maxCircles)
                 return;
@@ -84,7 +83,7 @@ namespace DotRecast.Detour.Crowd
             cir.dvel = dvel;
         }
 
-        public void AddSegment(Vector3 p, Vector3 q)
+        public void AddSegment(RcVec3f p, RcVec3f q)
         {
             if (m_nsegments >= m_maxSegments)
                 return;
@@ -114,7 +113,7 @@ namespace DotRecast.Detour.Crowd
             return m_segments[i];
         }
 
-        private void Prepare(Vector3 pos, Vector3 dvel)
+        private void Prepare(RcVec3f pos, RcVec3f dvel)
         {
             // Prepare obstacles
             for (int i = 0; i < m_ncircles; ++i)
@@ -122,14 +121,14 @@ namespace DotRecast.Detour.Crowd
                 DtObstacleCircle cir = m_circles[i];
 
                 // Side
-                Vector3 pa = pos;
-                Vector3 pb = cir.p;
+                RcVec3f pa = pos;
+                RcVec3f pb = cir.p;
 
-                Vector3 orig = new Vector3();
-                Vector3 dv = new Vector3();
-                cir.dp = Vector3.Subtract(pb, pa);
-                cir.dp = Vector3.Normalize(cir.dp);
-                dv = Vector3.Subtract(cir.dvel, dvel);
+                RcVec3f orig = new RcVec3f();
+                RcVec3f dv = new RcVec3f();
+                cir.dp = RcVec3f.Subtract(pb, pa);
+                cir.dp = RcVec3f.Normalize(cir.dp);
+                dv = RcVec3f.Subtract(cir.dvel, dvel);
 
                 float a = DtUtils.TriArea2D(orig, cir.dp, dv);
                 if (a < 0.01f)
@@ -155,14 +154,14 @@ namespace DotRecast.Detour.Crowd
             }
         }
 
-        private bool SweepCircleCircle(Vector3 c0, float r0, Vector3 v, Vector3 c1, float r1, out float tmin, out float tmax)
+        private bool SweepCircleCircle(RcVec3f c0, float r0, RcVec3f v, RcVec3f c1, float r1, out float tmin, out float tmax)
         {
             const float EPS = 0.0001f;
 
             tmin = 0;
             tmax = 0;
 
-            Vector3 s = Vector3.Subtract(c1, c0);
+            RcVec3f s = RcVec3f.Subtract(c1, c0);
             float r = r0 + r1;
             float c = s.Dot2D(s) - r * r;
             float a = v.Dot2D(v);
@@ -184,10 +183,10 @@ namespace DotRecast.Detour.Crowd
             return true;
         }
 
-        private bool IsectRaySeg(Vector3 ap, Vector3 u, Vector3 bp, Vector3 bq, ref float t)
+        private bool IsectRaySeg(RcVec3f ap, RcVec3f u, RcVec3f bp, RcVec3f bq, ref float t)
         {
-            Vector3 v = Vector3.Subtract(bq, bp);
-            Vector3 w = Vector3.Subtract(ap, bp);
+            RcVec3f v = RcVec3f.Subtract(bq, bp);
+            RcVec3f w = RcVec3f.Subtract(ap, bp);
             float d = RcVecUtils.Perp2D(u, v);
             if (MathF.Abs(d) < 1e-6f)
                 return false;
@@ -214,7 +213,7 @@ namespace DotRecast.Detour.Crowd
      * @param minPenalty
      *            threshold penalty for early out
      */
-        private float ProcessSample(Vector3 vcand, float cs, Vector3 pos, float rad, Vector3 vel, Vector3 dvel,
+        private float ProcessSample(RcVec3f vcand, float cs, RcVec3f pos, float rad, RcVec3f vel, RcVec3f dvel,
             float minPenalty, DtObstacleAvoidanceDebugData debug)
         {
             // penalty for straying away from the desired and current velocities
@@ -238,9 +237,9 @@ namespace DotRecast.Detour.Crowd
                 DtObstacleCircle cir = m_circles[i];
 
                 // RVO
-                Vector3 vab = vcand.Scale(2);
-                vab = Vector3.Subtract(vab, vel);
-                vab = Vector3.Subtract(vab, cir.vel);
+                RcVec3f vab = vcand.Scale(2);
+                vab = RcVec3f.Subtract(vab, vel);
+                vab = RcVec3f.Subtract(vab, cir.vel);
 
                 // Side
                 side += Math.Clamp(Math.Min(cir.dp.Dot2D(vab) * 0.5f + 0.5f, cir.np.Dot2D(vab) * 2), 0.0f, 1.0f);
@@ -276,8 +275,8 @@ namespace DotRecast.Detour.Crowd
                 if (seg.touch)
                 {
                     // Special case when the agent is very close to the segment.
-                    Vector3 sdir = Vector3.Subtract(seg.q, seg.p);
-                    Vector3 snorm = new Vector3();
+                    RcVec3f sdir = RcVec3f.Subtract(seg.q, seg.p);
+                    RcVec3f snorm = new RcVec3f();
                     snorm.X = -sdir.Z;
                     snorm.Z = sdir.X;
                     // If the velocity is pointing towards the segment, no collision.
@@ -319,7 +318,7 @@ namespace DotRecast.Detour.Crowd
             return penalty;
         }
 
-        public int SampleVelocityGrid(Vector3 pos, float rad, float vmax, Vector3 vel, Vector3 dvel, out Vector3 nvel,
+        public int SampleVelocityGrid(RcVec3f pos, float rad, float vmax, RcVec3f vel, RcVec3f dvel, out RcVec3f nvel,
             DtObstacleAvoidanceParams option, DtObstacleAvoidanceDebugData debug)
         {
             Prepare(pos, dvel);
@@ -328,7 +327,7 @@ namespace DotRecast.Detour.Crowd
             m_vmax = vmax;
             m_invVmax = vmax > 0 ? 1.0f / vmax : float.MaxValue;
 
-            nvel = Vector3.Zero;
+            nvel = RcVec3f.Zero;
 
             if (debug != null)
                 debug.Reset();
@@ -345,7 +344,7 @@ namespace DotRecast.Detour.Crowd
             {
                 for (int x = 0; x < m_params.gridSize; ++x)
                 {
-                    Vector3 vcand = new Vector3(cvx + x * cs - half, 0f, cvz + y * cs - half);
+                    RcVec3f vcand = new RcVec3f(cvx + x * cs - half, 0f, cvz + y * cs - half);
                     if (RcMath.Sqr(vcand.X) + RcMath.Sqr(vcand.Z) > RcMath.Sqr(vmax + cs / 2))
                         continue;
 
@@ -374,9 +373,9 @@ namespace DotRecast.Detour.Crowd
         }
 
         // vector normalization that ignores the y-component.
-        Vector3 DtRotate2D(float[] v, float ang)
+        RcVec3f DtRotate2D(float[] v, float ang)
         {
-            Vector3 dest = new Vector3();
+            RcVec3f dest = new RcVec3f();
             float c = MathF.Cos(ang);
             float s = MathF.Sin(ang);
             dest.X = v[0] * c - v[2] * s;
@@ -387,7 +386,7 @@ namespace DotRecast.Detour.Crowd
 
         static readonly float DT_PI = 3.14159265f;
 
-        public int SampleVelocityAdaptive(Vector3 pos, float rad, float vmax, Vector3 vel, Vector3 dvel, out Vector3 nvel,
+        public int SampleVelocityAdaptive(RcVec3f pos, float rad, float vmax, RcVec3f vel, RcVec3f dvel, out RcVec3f nvel,
             DtObstacleAvoidanceParams option,
             DtObstacleAvoidanceDebugData debug)
         {
@@ -397,7 +396,7 @@ namespace DotRecast.Detour.Crowd
             m_vmax = vmax;
             m_invVmax = vmax > 0 ? 1.0f / vmax : float.MaxValue;
 
-            nvel = Vector3.Zero;
+            nvel = RcVec3f.Zero;
 
             if (debug != null)
                 debug.Reset();
@@ -422,7 +421,7 @@ namespace DotRecast.Detour.Crowd
             ddir[1] = dvel.Y;
             ddir[2] = dvel.Z;
             DtNormalize2D(ddir);
-            Vector3 rotated = DtRotate2D(ddir, da * 0.5f); // rotated by da/2
+            RcVec3f rotated = DtRotate2D(ddir, da * 0.5f); // rotated by da/2
             ddir[3] = rotated.X;
             ddir[4] = rotated.Y;
             ddir[5] = rotated.Z;
@@ -465,17 +464,17 @@ namespace DotRecast.Detour.Crowd
 
             // Start sampling.
             float cr = vmax * (1.0f - m_params.velBias);
-            Vector3 res = new Vector3(dvel.X * m_params.velBias, 0, dvel.Z * m_params.velBias);
+            RcVec3f res = new RcVec3f(dvel.X * m_params.velBias, 0, dvel.Z * m_params.velBias);
             int ns = 0;
             for (int k = 0; k < depth; ++k)
             {
                 float minPenalty = float.MaxValue;
-                Vector3 bvel = new Vector3();
-                bvel = Vector3.Zero;
+                RcVec3f bvel = new RcVec3f();
+                bvel = RcVec3f.Zero;
 
                 for (int i = 0; i < npat; ++i)
                 {
-                    Vector3 vcand = new Vector3(res.X + pat[i * 2 + 0] * cr, 0f, res.Z + pat[i * 2 + 1] * cr);
+                    RcVec3f vcand = new RcVec3f(res.X + pat[i * 2 + 0] * cr, 0f, res.Z + pat[i * 2 + 1] * cr);
                     if (RcMath.Sqr(vcand.X) + RcMath.Sqr(vcand.Z) > RcMath.Sqr(vmax + 0.001f))
                         continue;
 

src/DotRecast.Detour.Crowd/DtObstacleCircle.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
@@ -7,21 +6,21 @@ namespace DotRecast.Detour.Crowd
     public class DtObstacleCircle
     {
         /** Position of the obstacle */
-        public Vector3 p = new Vector3();
+        public RcVec3f p = new RcVec3f();
 
         /** Velocity of the obstacle */
-        public Vector3 vel = new Vector3();
+        public RcVec3f vel = new RcVec3f();
 
         /** Velocity of the obstacle */
-        public Vector3 dvel = new Vector3();
+        public RcVec3f dvel = new RcVec3f();
 
         /** Radius of the obstacle */
         public float rad;
 
         /** Use for side selection during sampling. */
-        public Vector3 dp = new Vector3();
+        public RcVec3f dp = new RcVec3f();
 
         /** Use for side selection during sampling. */
-        public Vector3 np = new Vector3();
+        public RcVec3f np = new RcVec3f();
     }
 }

src/DotRecast.Detour.Crowd/DtObstacleSegment.cs

@@ -1,15 +1,14 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
     public class DtObstacleSegment
     {
         /** End points of the obstacle segment */
-        public Vector3 p = new Vector3();
+        public RcVec3f p = new RcVec3f();
 
         /** End points of the obstacle segment */
-        public Vector3 q = new Vector3();
+        public RcVec3f q = new RcVec3f();
 
         public bool touch;
     }

src/DotRecast.Detour.Crowd/DtPathCorridor.cs

@@ -22,100 +22,118 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 
 namespace DotRecast.Detour.Crowd
 {
-    /**
-     * Represents a dynamic polygon corridor used to plan agent movement.
-     *
-     * The corridor is loaded with a path, usually obtained from a #NavMeshQuery::FindPath() query. The corridor is then
-     * used to plan local movement, with the corridor automatically updating as needed to deal with inaccurate agent
-     * locomotion.
-     *
-     * Example of a common use case:
-     *
-     * -# Construct the corridor object and call -# Obtain a path from a #dtNavMeshQuery object. -# Use #Reset() to set the
-     * agent's current position. (At the beginning of the path.) -# Use #SetCorridor() to load the path and target. -# Use
-     * #FindCorners() to plan movement. (This handles dynamic path straightening.) -# Use #MovePosition() to feed agent
-     * movement back into the corridor. (The corridor will automatically adjust as needed.) -# If the target is moving, use
-     * #MoveTargetPosition() to update the end of the corridor. (The corridor will automatically adjust as needed.) -#
-     * Repeat the previous 3 steps to continue to move the agent.
-     *
-     * The corridor position and target are always constrained to the navigation mesh.
-     *
-     * One of the difficulties in maintaining a path is that floating point errors, locomotion inaccuracies, and/or local
-     * steering can result in the agent crossing the boundary of the path corridor, temporarily invalidating the path. This
-     * class uses local mesh queries to detect and update the corridor as needed to handle these types of issues.
-     *
-     * The fact that local mesh queries are used to move the position and target locations results in two beahviors that
-     * need to be considered:
-     *
-     * Every time a move function is used there is a chance that the path will become non-optimial. Basically, the further
-     * the target is moved from its original location, and the further the position is moved outside the original corridor,
-     * the more likely the path will become non-optimal. This issue can be addressed by periodically running the
-     * #OptimizePathTopology() and #OptimizePathVisibility() methods.
-     *
-     * All local mesh queries have distance limitations. (Review the #dtNavMeshQuery methods for details.) So the most
-     * accurate use case is to move the position and target in small increments. If a large increment is used, then the
-     * corridor may not be able to accurately find the new location. Because of this limiation, if a position is moved in a
-     * large increment, then compare the desired and resulting polygon references. If the two do not match, then path
-     * replanning may be needed. E.g. If you move the target, check #GetLastPoly() to see if it is the expected polygon.
-     *
-     */
+    /// Represents a dynamic polygon corridor used to plan agent movement.
+    /// @ingroup crowd, detour
     public class DtPathCorridor
     {
-        private Vector3 m_pos = new Vector3();
-        private Vector3 m_target = new Vector3();
-        private List<long> m_path;
+        private RcVec3f m_pos;
+        private RcVec3f m_target;
 
+        private List<long> m_path;
+        private int m_maxPath;
 
         /**
-     * Allocates the corridor's path buffer.
+        @class dtPathCorridor
+        @par
+
+        The corridor is loaded with a path, usually obtained from a #dtNavMeshQuery::findPath() query. The corridor
+        is then used to plan local movement, with the corridor automatically updating as needed to deal with inaccurate
+        agent locomotion.
+
+        Example of a common use case:
+
+        -# Construct the corridor object and call #init() to allocate its path buffer.
+        -# Obtain a path from a #dtNavMeshQuery object.
+        -# Use #reset() to set the agent's current position. (At the beginning of the path.)
+        -# Use #setCorridor() to load the path and target.
+        -# Use #findCorners() to plan movement. (This handles dynamic path straightening.)
+        -# Use #movePosition() to feed agent movement back into the corridor. (The corridor will automatically adjust as needed.)
+        -# If the target is moving, use #moveTargetPosition() to update the end of the corridor.
+           (The corridor will automatically adjust as needed.)
+        -# Repeat the previous 3 steps to continue to move the agent.
+
+        The corridor position and target are always constrained to the navigation mesh.
+
+        One of the difficulties in maintaining a path is that floating point errors, locomotion inaccuracies, and/or local
+        steering can result in the agent crossing the boundary of the path corridor, temporarily invalidating the path.
+        This class uses local mesh queries to detect and update the corridor as needed to handle these types of issues.
+
+        The fact that local mesh queries are used to move the position and target locations results in two beahviors that
+        need to be considered:
+
+        Every time a move function is used there is a chance that the path will become non-optimial. Basically, the further
+        the target is moved from its original location, and the further the position is moved outside the original corridor,
+        the more likely the path will become non-optimal. This issue can be addressed by periodically running the
+        #optimizePathTopology() and #optimizePathVisibility() methods.
+
+        All local mesh queries have distance limitations. (Review the #dtNavMeshQuery methods for details.) So the most accurate
+        use case is to move the position and target in small increments. If a large increment is used, then the corridor
+        may not be able to accurately find the new location.  Because of this limiation, if a position is moved in a large
+        increment, then compare the desired and resulting polygon references. If the two do not match, then path replanning
+        may be needed.  E.g. If you move the target, check #getLastPoly() to see if it is the expected polygon.
         */
         public DtPathCorridor()
         {
-            m_path = new List<long>();
         }
 
-        /**
-     * Resets the path corridor to the specified position.
-     *
-     * @param ref
-     *            The polygon reference containing the position.
-     * @param pos
-     *            The new position in the corridor. [(x, y, z)]
-     */
-        public void Reset(long refs, Vector3 pos)
+        /// @par
+        ///
+        /// @warning Cannot be called more than once.
+        /// Allocates the corridor's path buffer. 
+        ///  @param[in]		maxPath		The maximum path size the corridor can handle.
+        /// @return True if the initialization succeeded.
+        public bool Init(int maxPath)
+        {
+            m_path = new List<long>();
+            m_maxPath = maxPath;
+            return true;
+        }
+
+        /// @par
+        ///
+        /// Essentially, the corridor is set of one polygon in size with the target
+        /// equal to the position.
+        /// 
+        /// Resets the path corridor to the specified position.
+        ///  @param[in]		ref		The polygon reference containing the position.
+        ///  @param[in]		pos		The new position in the corridor. [(x, y, z)]
+        public void Reset(long refs, RcVec3f pos)
         {
-            m_path.Clear();
-            m_path.Add(refs);
             m_pos = pos;
             m_target = pos;
+            m_path.Clear();
+            m_path.Add(refs);
         }
 
-        private static readonly float MIN_TARGET_DIST = RcMath.Sqr(0.01f);
-
         /**
-     * Finds the corners in the corridor from the position toward the target. (The straightened path.)
-     *
-     * This is the function used to plan local movement within the corridor. One or more corners can be detected in
-     * order to plan movement. It performs essentially the same function as #dtNavMeshQuery::findStraightPath.
-     *
-     * Due to internal optimizations, the maximum number of corners returned will be (@p maxCorners - 1) For example: If
-     * the buffers are sized to hold 10 corners, the function will never return more than 9 corners. So if 10 corners
-     * are needed, the buffers should be sized for 11 corners.
-     *
-     * If the target is within range, it will be the last corner and have a polygon reference id of zero.
-     *
-     * @param filter
-     *
-     * @param[in] navquery The query object used to build the corridor.
-     * @return Corners
+        @par
+
+        This is the function used to plan local movement within the corridor. One or more corners can be
+        detected in order to plan movement. It performs essentially the same function as #dtNavMeshQuery::findStraightPath.
+
+        Due to internal optimizations, the maximum number of corners returned will be (@p maxCorners - 1)
+        For example: If the buffers are sized to hold 10 corners, the function will never return more than 9 corners.
+        So if 10 corners are needed, the buffers should be sized for 11 corners.
+
+        If the target is within range, it will be the last corner and have a polygon reference id of zero.
         */
+        /// Finds the corners in the corridor from the position toward the target. (The straightened path.)
+        ///  @param[out]	cornerVerts		The corner vertices. [(x, y, z) * cornerCount] [Size: <= maxCorners]
+        ///  @param[out]	cornerFlags		The flag for each corner. [(flag) * cornerCount] [Size: <= maxCorners]
+        ///  @param[out]	cornerPolys		The polygon reference for each corner. [(polyRef) * cornerCount] 
+        ///  								[Size: <= @p maxCorners]
+        ///  @param[in]		maxCorners		The maximum number of corners the buffers can hold.
+        ///  @param[in]		navquery		The query object used to build the corridor.
+        ///  @param[in]		filter			The filter to apply to the operation.
+        /// @return The number of corners returned in the corner buffers. [0 <= value <= @p maxCorners]
         public int FindCorners(ref List<DtStraightPath> corners, int maxCorners, DtNavMeshQuery navquery, IDtQueryFilter filter)
         {
+            const float MIN_TARGET_DIST = 0.01f;
+
             var result = navquery.FindStraightPath(m_pos, m_target, m_path, ref corners, maxCorners, 0);
             if (result.Succeeded())
             {
@@ -124,7 +142,7 @@ namespace DotRecast.Detour.Crowd
                 foreach (DtStraightPath spi in corners)
                 {
                     if ((spi.flags & DtStraightPathFlags.DT_STRAIGHTPATH_OFFMESH_CONNECTION) != 0
-                        || RcVecUtils.Dist2DSqr(spi.pos, m_pos) > MIN_TARGET_DIST)
+                        || RcVecUtils.Dist2DSqr(spi.pos, m_pos) > RcMath.Sqr(MIN_TARGET_DIST))
                     {
                         break;
                     }
@@ -151,33 +169,29 @@ namespace DotRecast.Detour.Crowd
         }
 
         /**
-     * Attempts to optimize the path if the specified point is visible from the current position.
-     *
-     * Inaccurate locomotion or dynamic obstacle avoidance can force the agent position significantly outside the
-     * original corridor. Over time this can result in the formation of a non-optimal corridor. Non-optimal paths can
-     * also form near the corners of tiles.
-     *
-     * This function uses an efficient local visibility search to try to optimize the corridor between the current
-     * position and @p next.
-     *
-     * The corridor will change only if @p next is visible from the current position and moving directly toward the
-     * point is better than following the existing path.
-     *
-     * The more inaccurate the agent movement, the more beneficial this function becomes. Simply adjust the frequency of
-     * the call to match the needs to the agent.
-     *
-     * This function is not suitable for long distance searches.
-     *
-     * @param next
-     *            The point to search toward. [(x, y, z])
-     * @param pathOptimizationRange
-     *            The maximum range to search. [Limit: > 0]
-     * @param navquery
-     *            The query object used to build the corridor.
-     * @param filter
-     *            The filter to apply to the operation.
+        @par
+
+        Inaccurate locomotion or dynamic obstacle avoidance can force the argent position significantly outside the
+        original corridor. Over time this can result in the formation of a non-optimal corridor. Non-optimal paths can
+        also form near the corners of tiles.
+
+        This function uses an efficient local visibility search to try to optimize the corridor
+        between the current position and @p next.
+
+        The corridor will change only if @p next is visible from the current position and moving directly toward the point
+        is better than following the existing path.
+
+        The more inaccurate the agent movement, the more beneficial this function becomes. Simply adjust the frequency
+        of the call to match the needs to the agent.
+
+        This function is not suitable for long distance searches.
         */
-        public void OptimizePathVisibility(Vector3 next, float pathOptimizationRange, DtNavMeshQuery navquery, IDtQueryFilter filter)
+        /// Attempts to optimize the path if the specified point is visible from the current position.
+        ///  @param[in]		next					The point to search toward. [(x, y, z])
+        ///  @param[in]		pathOptimizationRange	The maximum range to search. [Limit: > 0]
+        ///  @param[in]		navquery				The query object used to build the corridor.
+        ///  @param[in]		filter					The filter to apply to the operation.	
+        public void OptimizePathVisibility(RcVec3f next, float pathOptimizationRange, DtNavMeshQuery navquery, IDtQueryFilter filter)
         {
             // Clamp the ray to max distance.
             float dist = RcVecUtils.Dist2D(m_pos, next);
@@ -188,40 +202,37 @@ namespace DotRecast.Detour.Crowd
                 return;
             }
 
-            // Overshoot a little. This helps to optimize open fields in tiled
-            // meshes.
+            // Overshoot a little. This helps to optimize open fields in tiled meshes.
             dist = Math.Min(dist + 0.01f, pathOptimizationRange);
 
             // Adjust ray length.
-            var delta = Vector3.Subtract(next, m_pos);
-            Vector3 goal = RcVecUtils.Mad(m_pos, delta, pathOptimizationRange / dist);
+            var delta = RcVec3f.Subtract(next, m_pos);
+            RcVec3f goal = RcVecUtils.Mad(m_pos, delta, pathOptimizationRange / dist);
 
-            var status = navquery.Raycast(m_path[0], m_pos, goal, filter, 0, 0, out var rayHit);
+            var res = new List<long>();
+            var status = navquery.Raycast(m_path[0], m_pos, goal, filter, out var t, out var norm, ref res);
             if (status.Succeeded())
             {
-                if (rayHit.path.Count > 1 && rayHit.t > 0.99f)
+                if (res.Count > 1 && t > 0.99f)
                 {
-                    m_path = DtPathUtils.MergeCorridorStartShortcut(m_path, rayHit.path);
+                    m_path = DtPathUtils.MergeCorridorStartShortcut(m_path, m_path.Count, m_maxPath, res);
                 }
             }
         }
 
         /**
-     * Attempts to optimize the path using a local area search. (Partial replanning.)
-     *
-     * Inaccurate locomotion or dynamic obstacle avoidance can force the agent position significantly outside the
-     * original corridor. Over time this can result in the formation of a non-optimal corridor. This function will use a
-     * local area path search to try to re-optimize the corridor.
-     *
-     * The more inaccurate the agent movement, the more beneficial this function becomes. Simply adjust the frequency of
-     * the call to match the needs to the agent.
-     *
-     * @param navquery
-     *            The query object used to build the corridor.
-     * @param filter
-     *            The filter to apply to the operation.
-     *
+        @par
+
+        Inaccurate locomotion or dynamic obstacle avoidance can force the agent position significantly outside the
+        original corridor. Over time this can result in the formation of a non-optimal corridor. This function will use a
+        local area path search to try to re-optimize the corridor.
+
+        The more inaccurate the agent movement, the more beneficial this function becomes. Simply adjust the frequency of
+        the call to match the needs to the agent.
         */
+        /// Attempts to optimize the path using a local area search. (Partial replanning.) 
+        ///  @param[in]		navquery	The query object used to build the corridor.
+        ///  @param[in]		filter		The filter to apply to the operation.	
         public bool OptimizePathTopology(DtNavMeshQuery navquery, IDtQueryFilter filter, int maxIterations)
         {
             if (m_path.Count < 3)
@@ -230,20 +241,20 @@ namespace DotRecast.Detour.Crowd
             }
 
             var res = new List<long>();
-            navquery.InitSlicedFindPath(m_path[0], m_path[m_path.Count - 1], m_pos, m_target, filter, 0);
+            navquery.InitSlicedFindPath(m_path[0], m_path[^1], m_pos, m_target, filter, 0);
             navquery.UpdateSlicedFindPath(maxIterations, out var _);
             var status = navquery.FinalizeSlicedFindPathPartial(m_path, ref res);
 
             if (status.Succeeded() && res.Count > 0)
             {
-                m_path = DtPathUtils.MergeCorridorStartShortcut(m_path, res);
+                m_path = DtPathUtils.MergeCorridorStartShortcut(m_path, m_path.Count, m_maxPath, res);
                 return true;
             }
 
             return false;
         }
 
-        public bool MoveOverOffmeshConnection(long offMeshConRef, long[] refs, ref Vector3 startPos, ref Vector3 endPos, DtNavMeshQuery navquery)
+        public bool MoveOverOffmeshConnection(long offMeshConRef, long[] refs, ref RcVec3f startPos, ref RcVec3f endPos, DtNavMeshQuery navquery)
         {
             // Advance the path up to and over the off-mesh connection.
             long prevRef = 0, polyRef = m_path[0];
@@ -278,36 +289,34 @@ namespace DotRecast.Detour.Crowd
         }
 
         /**
-     * Moves the position from the current location to the desired location, adjusting the corridor as needed to reflect
-     * the change.
-     *
-     * Behavior:
-     *
-     * - The movement is constrained to the surface of the navigation mesh. - The corridor is automatically adjusted
-     * (shorted or lengthened) in order to remain valid. - The new position will be located in the adjusted corridor's
-     * first polygon.
-     *
-     * The expected use case is that the desired position will be 'near' the current corridor. What is considered 'near'
-     * depends on local polygon density, query search extents, etc.
-     *
-     * The resulting position will differ from the desired position if the desired position is not on the navigation
-     * mesh, or it can't be reached using a local search.
-     *
-     * @param npos
-     *            The desired new position. [(x, y, z)]
-     * @param navquery
-     *            The query object used to build the corridor.
-     * @param filter
-     *            The filter to apply to the operation.
+        @par
+
+        Behavior:
+
+        - The movement is constrained to the surface of the navigation mesh.
+        - The corridor is automatically adjusted (shorted or lengthened) in order to remain valid.
+        - The new position will be located in the adjusted corridor's first polygon.
+
+        The expected use case is that the desired position will be 'near' the current corridor. What is considered 'near'
+        depends on local polygon density, query search half extents, etc.
+
+        The resulting position will differ from the desired position if the desired position is not on the navigation mesh,
+        or it can't be reached using a local search.
         */
-        public bool MovePosition(Vector3 npos, DtNavMeshQuery navquery, IDtQueryFilter filter)
+        /// Moves the position from the current location to the desired location, adjusting the corridor 
+        /// as needed to reflect the change.
+        ///  @param[in]		npos		The desired new position. [(x, y, z)]
+        ///  @param[in]		navquery	The query object used to build the corridor.
+        ///  @param[in]		filter		The filter to apply to the operation.
+        /// @return Returns true if move succeeded.
+        public bool MovePosition(RcVec3f npos, DtNavMeshQuery navquery, IDtQueryFilter filter)
         {
             // Move along navmesh and update new position.
             var visited = new List<long>();
             var status = navquery.MoveAlongSurface(m_path[0], m_pos, npos, filter, out var result, ref visited);
             if (status.Succeeded())
             {
-                m_path = DtPathUtils.MergeCorridorStartMoved(m_path, visited);
+                m_path = DtPathUtils.MergeCorridorStartMoved(m_path, m_path.Count, m_maxPath, visited);
 
                 // Adjust the position to stay on top of the navmesh.
                 m_pos = result;
@@ -324,30 +333,32 @@ namespace DotRecast.Detour.Crowd
         }
 
         /**
-     * Moves the target from the curent location to the desired location, adjusting the corridor as needed to reflect
-     * the change. Behavior: - The movement is constrained to the surface of the navigation mesh. - The corridor is
-     * automatically adjusted (shorted or lengthened) in order to remain valid. - The new target will be located in the
-     * adjusted corridor's last polygon.
-     *
-     * The expected use case is that the desired target will be 'near' the current corridor. What is considered 'near'
-     * depends on local polygon density, query search extents, etc. The resulting target will differ from the desired
-     * target if the desired target is not on the navigation mesh, or it can't be reached using a local search.
-     *
-     * @param npos
-     *            The desired new target position. [(x, y, z)]
-     * @param navquery
-     *            The query object used to build the corridor.
-     * @param filter
-     *            The filter to apply to the operation.
+        @par
+
+        Behavior:
+
+        - The movement is constrained to the surface of the navigation mesh.
+        - The corridor is automatically adjusted (shorted or lengthened) in order to remain valid.
+        - The new target will be located in the adjusted corridor's last polygon.
+
+        The expected use case is that the desired target will be 'near' the current corridor. What is considered 'near' depends on local polygon density, query search half extents, etc.
+
+        The resulting target will differ from the desired target if the desired target is not on the navigation mesh, or it can't be reached using a local search.
         */
-        public bool MoveTargetPosition(Vector3 npos, DtNavMeshQuery navquery, IDtQueryFilter filter)
+        /// Moves the target from the curent location to the desired location, adjusting the corridor
+        /// as needed to reflect the change. 
+        ///  @param[in]		npos		The desired new target position. [(x, y, z)]
+        ///  @param[in]		navquery	The query object used to build the corridor.
+        ///  @param[in]		filter		The filter to apply to the operation.
+        /// @return Returns true if move succeeded.
+        public bool MoveTargetPosition(RcVec3f npos, DtNavMeshQuery navquery, IDtQueryFilter filter)
         {
             // Move along navmesh and update new position.
             var visited = new List<long>();
-            var status = navquery.MoveAlongSurface(m_path[m_path.Count - 1], m_target, npos, filter, out var result, ref visited);
+            var status = navquery.MoveAlongSurface(m_path[^1], m_target, npos, filter, out var result, ref visited);
             if (status.Succeeded())
             {
-                m_path = DtPathUtils.MergeCorridorEndMoved(m_path, visited);
+                m_path = DtPathUtils.MergeCorridorEndMoved(m_path, m_path.Count, m_maxPath, visited);
                 // TODO: should we do that?
                 // Adjust the position to stay on top of the navmesh.
                 /*
@@ -361,23 +372,23 @@ namespace DotRecast.Detour.Crowd
             return false;
         }
 
-        /**
-     * Loads a new path and target into the corridor. The current corridor position is expected to be within the first
-     * polygon in the path. The target is expected to be in the last polygon.
-     *
-     * @warning The size of the path must not exceed the size of corridor's path buffer set during #Init().
-     * @param target
-     *            The target location within the last polygon of the path. [(x, y, z)]
-     * @param path
-     *            The path corridor.
-     */
-        public void SetCorridor(Vector3 target, List<long> path)
+        /// @par
+        ///
+        /// The current corridor position is expected to be within the first polygon in the path. The target 
+        /// is expected to be in the last polygon. 
+        /// 
+        /// @warning The size of the path must not exceed the size of corridor's path buffer set during #init().
+        /// Loads a new path and target into the corridor.
+        ///  @param[in]		target		The target location within the last polygon of the path. [(x, y, z)]
+        ///  @param[in]		path		The path corridor. [(polyRef) * @p npolys]
+        ///  @param[in]		npath		The number of polygons in the path.
+        public void SetCorridor(RcVec3f target, List<long> path)
         {
             m_target = target;
             m_path = new List<long>(path);
         }
 
-        public void FixPathStart(long safeRef, Vector3 safePos)
+        public void FixPathStart(long safeRef, RcVec3f safePos)
         {
             m_pos = safePos;
             if (m_path.Count < 3 && m_path.Count > 0)
@@ -428,19 +439,15 @@ namespace DotRecast.Detour.Crowd
             return true;
         }
 
-        /**
-     * Checks the current corridor path to see if its polygon references remain valid. The path can be invalidated if
-     * there are structural changes to the underlying navigation mesh, or the state of a polygon within the path changes
-     * resulting in it being filtered out. (E.g. An exclusion or inclusion flag changes.)
-     *
-     * @param maxLookAhead
-     *            The number of polygons from the beginning of the corridor to search.
-     * @param navquery
-     *            The query object used to build the corridor.
-     * @param filter
-     *            The filter to apply to the operation.
-     * @return
-     */
+        /// @par
+        ///
+        /// The path can be invalidated if there are structural changes to the underlying navigation mesh, or the state of 
+        /// a polygon within the path changes resulting in it being filtered out. (E.g. An exclusion or inclusion flag changes.)
+        /// Checks the current corridor path to see if its polygon references remain valid.
+        /// 
+        ///  @param[in]		maxLookAhead	The number of polygons from the beginning of the corridor to search.
+        ///  @param[in]		navquery		The query object used to build the corridor.
+        ///  @param[in]		filter			The filter to apply to the operation.	
         public bool IsValid(int maxLookAhead, DtNavMeshQuery navquery, IDtQueryFilter filter)
         {
             // Check that all polygons still pass query filter.
@@ -456,59 +463,43 @@ namespace DotRecast.Detour.Crowd
             return true;
         }
 
-        /**
-     * Gets the current position within the corridor. (In the first polygon.)
-     *
-     * @return The current position within the corridor.
-     */
-        public Vector3 GetPos()
+        /// Gets the current position within the corridor. (In the first polygon.)
+        /// @return The current position within the corridor.
+        public RcVec3f GetPos()
         {
             return m_pos;
         }
 
-        /**
-     * Gets the current target within the corridor. (In the last polygon.)
-     *
-     * @return The current target within the corridor.
-     */
-        public Vector3 GetTarget()
+        /// Gets the current target within the corridor. (In the last polygon.)
+        /// @return The current target within the corridor.
+        public RcVec3f GetTarget()
         {
             return m_target;
         }
 
-        /**
-     * The polygon reference id of the first polygon in the corridor, the polygon containing the position.
-     *
-     * @return The polygon reference id of the first polygon in the corridor. (Or zero if there is no path.)
-     */
+        /// The polygon reference id of the first polygon in the corridor, the polygon containing the position.
+        /// @return The polygon reference id of the first polygon in the corridor. (Or zero if there is no path.)
         public long GetFirstPoly()
         {
             return 0 == m_path.Count ? 0 : m_path[0];
         }
 
-        /**
-     * The polygon reference id of the last polygon in the corridor, the polygon containing the target.
-     *
-     * @return The polygon reference id of the last polygon in the corridor. (Or zero if there is no path.)
-     */
+        /// The polygon reference id of the last polygon in the corridor, the polygon containing the target.
+        /// @return The polygon reference id of the last polygon in the corridor. (Or zero if there is no path.)
         public long GetLastPoly()
         {
             return 0 == m_path.Count ? 0 : m_path[m_path.Count - 1];
         }
 
-        /**
-     * The corridor's path.
-     */
+        /// The corridor's path.
+        /// @return The corridor's path. [(polyRef) * #getPathCount()]
         public List<long> GetPath()
         {
             return m_path;
         }
 
-        /**
-     * The number of polygons in the current corridor path.
-     *
-     * @return The number of polygons in the current corridor path.
-     */
+        /// The number of polygons in the current corridor path.
+        /// @return The number of polygons in the current corridor path.
         public int GetPathCount()
         {
             return m_path.Count;

src/DotRecast.Detour.Crowd/DtPathQuery.cs

@@ -19,15 +19,14 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
     public class DtPathQuery
     {
         /// Path find start and end location.
-        public Vector3 startPos = new Vector3();
-        public Vector3 endPos = new Vector3();
+        public RcVec3f startPos = new RcVec3f();
+        public RcVec3f endPos = new RcVec3f();
         public long startRef;
         public long endRef;
         

src/DotRecast.Detour.Crowd/DtPathQueue.cs

@@ -20,35 +20,35 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 
 namespace DotRecast.Detour.Crowd
 {
     public class DtPathQueue
     {
-        private readonly DtCrowdConfig config;
-        private readonly LinkedList<DtPathQuery> queue = new LinkedList<DtPathQuery>();
+        private readonly DtCrowdConfig m_config;
+        private readonly LinkedList<DtPathQuery> m_queue;
 
         public DtPathQueue(DtCrowdConfig config)
         {
-            this.config = config;
+            m_config = config;
+            m_queue = new LinkedList<DtPathQuery>();
         }
 
         public void Update(DtNavMesh navMesh)
         {
-            // Update path request until there is nothing to update or up to maxIters pathfinder iterations has been
-            // consumed.
-            int iterCount = config.maxFindPathIterations;
+            // Update path request until there is nothing to update
+            // or upto maxIters pathfinder iterations has been consumed.
+            int iterCount = m_config.maxFindPathIterations;
             while (iterCount > 0)
             {
-                DtPathQuery q = queue.First?.Value;
+                DtPathQuery q = m_queue.First?.Value;
                 if (q == null)
                 {
                     break;
                 }
 
-                queue.RemoveFirst();
+                m_queue.RemoveFirst();
 
                 // Handle query start.
                 if (q.result.status.IsEmpty())
@@ -71,14 +71,14 @@ namespace DotRecast.Detour.Crowd
 
                 if (!(q.result.status.Failed() || q.result.status.Succeeded()))
                 {
-                    queue.AddFirst(q);
+                    m_queue.AddFirst(q);
                 }
             }
         }
 
-        public DtPathQueryResult Request(long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter)
+        public DtPathQueryResult Request(long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter)
         {
-            if (queue.Count >= config.pathQueueSize)
+            if (m_queue.Count >= m_config.pathQueueSize)
             {
                 return null;
             }
@@ -89,7 +89,7 @@ namespace DotRecast.Detour.Crowd
             q.endPos = endPos;
             q.endRef = endRef;
             q.filter = filter;
-            queue.AddLast(q);
+            m_queue.AddLast(q);
             return q.result;
         }
     }

src/DotRecast.Detour.Crowd/DtProximityGrid.cs

@@ -83,30 +83,51 @@ namespace DotRecast.Detour.Crowd
             }
         }
 
-        // 해당 셀 사이즈의 크기로 x ~ y 영역을 찾아, 군집 에이전트를 가져오는 코드
-        public int QueryItems(float minx, float miny, float maxx, float maxy, ref HashSet<DtCrowdAgent> result)
+        public int QueryItems(float minx, float miny, float maxx, float maxy, DtCrowdAgent[] ids, int maxIds)
         {
             int iminx = (int)MathF.Floor(minx * _invCellSize);
             int iminy = (int)MathF.Floor(miny * _invCellSize);
             int imaxx = (int)MathF.Floor(maxx * _invCellSize);
             int imaxy = (int)MathF.Floor(maxy * _invCellSize);
 
+            int n = 0;
+
             for (int y = iminy; y <= imaxy; ++y)
             {
                 for (int x = iminx; x <= imaxx; ++x)
                 {
                     long key = CombineKey(x, y);
-                    if (_items.TryGetValue(key, out var ids))
+                    bool hasPool = _items.TryGetValue(key, out var pool);
+                    if (!hasPool)
                     {
-                        for (int i = 0; i < ids.Count; ++i)
+                        continue;
+                    }
+
+                    for (int idx = 0; idx < pool.Count; ++idx)
                     {
-                            result.Add(ids[i]);
+                        var item = pool[idx];
+
+                        // Check if the id exists already.
+                        int end = n;
+                        int i = 0;
+                        while (i != end && ids[i] != item)
+                        {
+                            ++i;
+                        }
+
+                        // Item not found, add it.
+                        if (i == n)
+                        {
+                            ids[n++] = item;
+
+                            if (n >= maxIds)
+                                return n;
                         }
                     }
                 }
             }
 
-            return result.Count;
+            return n;
         }
 
         public IEnumerable<(long, int)> GetItemCounts()

src/DotRecast.Detour.Crowd/DtSegment.cs

@@ -1,12 +1,11 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Crowd
 {
     public class DtSegment
     {
         /** Segment start/end */
-        public Vector3[] s = new Vector3[2];
+        public RcVec3f[] s = new RcVec3f[2];
 
         /** Distance for pruning. */
         public float d;

src/DotRecast.Detour.Dynamic/Colliders/DtBoxCollider.cs

@@ -20,24 +20,23 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic.Colliders
 {
     public class DtBoxCollider : DtCollider
     {
-        private readonly Vector3 center;
-        private readonly Vector3[] halfEdges;
+        private readonly RcVec3f center;
+        private readonly RcVec3f[] halfEdges;
 
-        public DtBoxCollider(Vector3 center, Vector3[] halfEdges, int area, float flagMergeThreshold) :
+        public DtBoxCollider(RcVec3f center, RcVec3f[] halfEdges, int area, float flagMergeThreshold) :
             base(area, flagMergeThreshold, Bounds(center, halfEdges))
         {
             this.center = center;
             this.halfEdges = halfEdges;
         }
 
-        private static float[] Bounds(Vector3 center, Vector3[] halfEdges)
+        private static float[] Bounds(RcVec3f center, RcVec3f[] halfEdges)
         {
             float[] bounds = new float[]
             {
@@ -63,26 +62,26 @@ namespace DotRecast.Detour.Dynamic.Colliders
             return bounds;
         }
 
-        public override void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public override void Rasterize(RcHeightfield hf, RcContext context)
         {
             RcFilledVolumeRasterization.RasterizeBox(
-                hf, center, halfEdges, area, (int)MathF.Floor(flagMergeThreshold / hf.ch), telemetry);
+                hf, center, halfEdges, area, (int)MathF.Floor(flagMergeThreshold / hf.ch), context);
         }
 
-        public static Vector3[] GetHalfEdges(Vector3 up, Vector3 forward, Vector3 extent)
+        public static RcVec3f[] GetHalfEdges(RcVec3f up, RcVec3f forward, RcVec3f extent)
         {
-            Vector3[] halfEdges =
+            RcVec3f[] halfEdges =
             {
-                Vector3.Zero,
-                new Vector3(up.X, up.Y, up.Z),
-                Vector3.Zero
+                RcVec3f.Zero,
+                new RcVec3f(up.X, up.Y, up.Z),
+                RcVec3f.Zero
             };
 
-            halfEdges[1] = Vector3.Normalize(halfEdges[1]);
-            halfEdges[0] = Vector3.Cross(up, forward);
-            halfEdges[0] = Vector3.Normalize(halfEdges[0]);
-            halfEdges[2] = Vector3.Cross(halfEdges[0], up);
-            halfEdges[2] = Vector3.Normalize(halfEdges[2]);
+            halfEdges[1] = RcVec3f.Normalize(halfEdges[1]);
+            halfEdges[0] = RcVec3f.Cross(up, forward);
+            halfEdges[0] = RcVec3f.Normalize(halfEdges[0]);
+            halfEdges[2] = RcVec3f.Cross(halfEdges[0], up);
+            halfEdges[2] = RcVec3f.Normalize(halfEdges[2]);
             halfEdges[0].X *= extent.X;
             halfEdges[0].Y *= extent.X;
             halfEdges[0].Z *= extent.X;

src/DotRecast.Detour.Dynamic/Colliders/DtCapsuleCollider.cs

@@ -20,18 +20,17 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic.Colliders
 {
     public class DtCapsuleCollider : DtCollider
     {
-        private readonly Vector3 start;
-        private readonly Vector3 end;
+        private readonly RcVec3f start;
+        private readonly RcVec3f end;
         private readonly float radius;
 
-        public DtCapsuleCollider(Vector3 start, Vector3 end, float radius, int area, float flagMergeThreshold)
+        public DtCapsuleCollider(RcVec3f start, RcVec3f end, float radius, int area, float flagMergeThreshold)
             : base(area, flagMergeThreshold, Bounds(start, end, radius))
         {
             this.start = start;
@@ -39,12 +38,12 @@ namespace DotRecast.Detour.Dynamic.Colliders
             this.radius = radius;
         }
 
-        public override void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public override void Rasterize(RcHeightfield hf, RcContext context)
         {
-            RcFilledVolumeRasterization.RasterizeCapsule(hf, start, end, radius, area, (int)MathF.Floor(flagMergeThreshold / hf.ch), telemetry);
+            RcFilledVolumeRasterization.RasterizeCapsule(hf, start, end, radius, area, (int)MathF.Floor(flagMergeThreshold / hf.ch), context);
         }
 
-        private static float[] Bounds(Vector3 start, Vector3 end, float radius)
+        private static float[] Bounds(RcVec3f start, RcVec3f end, float radius)
         {
             return new float[]
             {

src/DotRecast.Detour.Dynamic/Colliders/DtCollider.cs

@@ -40,6 +40,6 @@ namespace DotRecast.Detour.Dynamic.Colliders
             return _bounds;
         }
 
-        public abstract void Rasterize(RcHeightfield hf, RcTelemetry telemetry);
+        public abstract void Rasterize(RcHeightfield hf, RcContext context);
     }
 }

src/DotRecast.Detour.Dynamic/Colliders/DtCompositeCollider.cs

@@ -68,10 +68,10 @@ namespace DotRecast.Detour.Dynamic.Colliders
             return bounds;
         }
 
-        public void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public void Rasterize(RcHeightfield hf, RcContext context)
         {
             foreach (var c in colliders)
-                c.Rasterize(hf, telemetry);
+                c.Rasterize(hf, context);
         }
     }
 }

src/DotRecast.Detour.Dynamic/Colliders/DtConvexTrimeshCollider.cs

@@ -42,10 +42,10 @@ namespace DotRecast.Detour.Dynamic.Colliders
             this.triangles = triangles;
         }
 
-        public override void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public override void Rasterize(RcHeightfield hf, RcContext context)
         {
             RcFilledVolumeRasterization.RasterizeConvex(hf, vertices, triangles, area,
-                (int)MathF.Floor(flagMergeThreshold / hf.ch), telemetry);
+                (int)MathF.Floor(flagMergeThreshold / hf.ch), context);
         }
     }
 }

src/DotRecast.Detour.Dynamic/Colliders/DtCylinderCollider.cs

@@ -20,18 +20,17 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic.Colliders
 {
     public class DtCylinderCollider : DtCollider
     {
-        private readonly Vector3 start;
-        private readonly Vector3 end;
+        private readonly RcVec3f start;
+        private readonly RcVec3f end;
         private readonly float radius;
 
-        public DtCylinderCollider(Vector3 start, Vector3 end, float radius, int area, float flagMergeThreshold) :
+        public DtCylinderCollider(RcVec3f start, RcVec3f end, float radius, int area, float flagMergeThreshold) :
             base(area, flagMergeThreshold, Bounds(start, end, radius))
         {
             this.start = start;
@@ -39,13 +38,13 @@ namespace DotRecast.Detour.Dynamic.Colliders
             this.radius = radius;
         }
 
-        public override void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public override void Rasterize(RcHeightfield hf, RcContext context)
         {
             RcFilledVolumeRasterization.RasterizeCylinder(hf, start, end, radius, area, (int)MathF.Floor(flagMergeThreshold / hf.ch),
-                telemetry);
+                context);
         }
 
-        private static float[] Bounds(Vector3 start, Vector3 end, float radius)
+        private static float[] Bounds(RcVec3f start, RcVec3f end, float radius)
         {
             return new float[]
             {

src/DotRecast.Detour.Dynamic/Colliders/DtSphereCollider.cs

@@ -20,30 +20,29 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic.Colliders
 {
     public class DtSphereCollider : DtCollider
     {
-        private readonly Vector3 center;
+        private readonly RcVec3f center;
         private readonly float radius;
 
-        public DtSphereCollider(Vector3 center, float radius, int area, float flagMergeThreshold)
+        public DtSphereCollider(RcVec3f center, float radius, int area, float flagMergeThreshold)
             : base(area, flagMergeThreshold, Bounds(center, radius))
         {
             this.center = center;
             this.radius = radius;
         }
 
-        public override void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public override void Rasterize(RcHeightfield hf, RcContext context)
         {
             RcFilledVolumeRasterization.RasterizeSphere(hf, center, radius, area, (int)MathF.Floor(flagMergeThreshold / hf.ch),
-                telemetry);
+                context);
         }
 
-        private static float[] Bounds(Vector3 center, float radius)
+        private static float[] Bounds(RcVec3f center, float radius)
         {
             return new float[]
             {

src/DotRecast.Detour.Dynamic/Colliders/DtTrimeshCollider.cs

@@ -58,12 +58,12 @@ namespace DotRecast.Detour.Dynamic.Colliders
             return bounds;
         }
 
-        public override void Rasterize(RcHeightfield hf, RcTelemetry telemetry)
+        public override void Rasterize(RcHeightfield hf, RcContext context)
         {
             for (int i = 0; i < triangles.Length; i += 3)
             {
-                RcRasterizations.RasterizeTriangle(hf, vertices, triangles[i], triangles[i + 1], triangles[i + 2], area,
-                    (int)MathF.Floor(flagMergeThreshold / hf.ch), telemetry);
+                RcRasterizations.RasterizeTriangle(context, vertices, triangles[i], triangles[i + 1], triangles[i + 2], area,
+                    hf, (int)MathF.Floor(flagMergeThreshold / hf.ch));
             }
         }
     }

src/DotRecast.Detour.Dynamic/Colliders/IDtCollider.cs

@@ -25,6 +25,6 @@ namespace DotRecast.Detour.Dynamic.Colliders
     public interface IDtCollider
     {
         float[] Bounds();
-        void Rasterize(RcHeightfield hf, RcTelemetry telemetry);
+        void Rasterize(RcHeightfield hf, RcContext context);
     }
 }

src/DotRecast.Detour.Dynamic/DotRecast.Detour.Dynamic.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Detour.Dynamic</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Detour.Dynamic/DtDynamicNavMesh.cs

@@ -35,7 +35,7 @@ namespace DotRecast.Detour.Dynamic
         public readonly DtDynamicNavMeshConfig config;
         private readonly RcBuilder builder;
         private readonly Dictionary<long, DtDynamicTile> _tiles = new Dictionary<long, DtDynamicTile>();
-        private readonly RcTelemetry telemetry;
+        private readonly RcContext _context;
         private readonly DtNavMeshParams navMeshParams;
         private readonly BlockingCollection<IDtDaynmicTileJob> updateQueue = new BlockingCollection<IDtDaynmicTileJob>();
         private readonly RcAtomicLong currentColliderId = new RcAtomicLong(0);
@@ -72,7 +72,7 @@ namespace DotRecast.Detour.Dynamic
             }
 
             ;
-            telemetry = new RcTelemetry();
+            _context = new RcContext();
         }
 
         public DtNavMesh NavMesh()
@@ -218,7 +218,7 @@ namespace DotRecast.Detour.Dynamic
         {
             DtNavMeshCreateParams option = new DtNavMeshCreateParams();
             option.walkableHeight = config.walkableHeight;
-            dirty = dirty | tile.Build(builder, config, telemetry);
+            dirty = dirty | tile.Build(builder, config, _context);
         }
 
         private bool UpdateNavMesh()

src/DotRecast.Detour.Dynamic/DtDynamicTile.cs

@@ -44,12 +44,12 @@ namespace DotRecast.Detour.Dynamic
             this.voxelTile = voxelTile;
         }
 
-        public bool Build(RcBuilder builder, DtDynamicNavMeshConfig config, RcTelemetry telemetry)
+        public bool Build(RcBuilder builder, DtDynamicNavMeshConfig config, RcContext context)
         {
             if (dirty)
             {
-                RcHeightfield heightfield = BuildHeightfield(config, telemetry);
-                RcBuilderResult r = BuildRecast(builder, config, voxelTile, heightfield, telemetry);
+                RcHeightfield heightfield = BuildHeightfield(config, context);
+                RcBuilderResult r = BuildRecast(builder, config, voxelTile, heightfield, context);
                 DtNavMeshCreateParams option = NavMeshCreateParams(voxelTile.tileX, voxelTile.tileZ, voxelTile.cellSize,
                     voxelTile.cellHeight, config, r);
                 meshData = DtNavMeshBuilder.CreateNavMeshData(option);
@@ -59,7 +59,7 @@ namespace DotRecast.Detour.Dynamic
             return false;
         }
 
-        private RcHeightfield BuildHeightfield(DtDynamicNavMeshConfig config, RcTelemetry telemetry)
+        private RcHeightfield BuildHeightfield(DtDynamicNavMeshConfig config, RcContext context)
         {
             ICollection<long> rasterizedColliders = checkpoint != null
                 ? checkpoint.colliders as ICollection<long>
@@ -74,7 +74,7 @@ namespace DotRecast.Detour.Dynamic
                 if (!rasterizedColliders.Contains(cid))
                 {
                     heightfield.bmax.Y = Math.Max(heightfield.bmax.Y, c.Bounds()[4] + heightfield.ch * 2);
-                    c.Rasterize(heightfield, telemetry);
+                    c.Rasterize(heightfield, context);
                 }
             }
 
@@ -87,7 +87,7 @@ namespace DotRecast.Detour.Dynamic
         }
 
         private RcBuilderResult BuildRecast(RcBuilder builder, DtDynamicNavMeshConfig config, DtVoxelTile vt,
-            RcHeightfield heightfield, RcTelemetry telemetry)
+            RcHeightfield heightfield, RcContext context)
         {
             RcConfig rcConfig = new RcConfig(
                 config.useTiles, config.tileSizeX, config.tileSizeZ,
@@ -100,7 +100,7 @@ namespace DotRecast.Detour.Dynamic
                 Math.Min(DtDynamicNavMesh.MAX_VERTS_PER_POLY, config.vertsPerPoly),
                 config.detailSampleDistance, config.detailSampleMaxError,
                 true, true, true, default, true);
-            RcBuilderResult r = builder.Build(vt.tileX, vt.tileZ, null, rcConfig, heightfield, telemetry);
+            RcBuilderResult r = builder.Build(context, vt.tileX, vt.tileZ, null, rcConfig, heightfield);
             if (config.keepIntermediateResults)
             {
                 recastResult = r;

src/DotRecast.Detour.Dynamic/DtVoxelQuery.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic
@@ -31,12 +30,12 @@ namespace DotRecast.Detour.Dynamic
  */
     public class DtVoxelQuery
     {
-        private readonly Vector3 origin;
+        private readonly RcVec3f origin;
         private readonly float tileWidth;
         private readonly float tileDepth;
         private readonly Func<int, int, RcHeightfield> heightfieldProvider;
 
-        public DtVoxelQuery(Vector3 origin, float tileWidth, float tileDepth, Func<int, int, RcHeightfield> heightfieldProvider)
+        public DtVoxelQuery(RcVec3f origin, float tileWidth, float tileDepth, Func<int, int, RcHeightfield> heightfieldProvider)
         {
             this.origin = origin;
             this.tileWidth = tileWidth;
@@ -49,12 +48,12 @@ namespace DotRecast.Detour.Dynamic
      *
      * @return Optional with hit parameter (t) or empty if no hit found
      */
-        public bool Raycast(Vector3 start, Vector3 end, out float hit)
+        public bool Raycast(RcVec3f start, RcVec3f end, out float hit)
         {
             return TraverseTiles(start, end, out hit);
         }
 
-        private bool TraverseTiles(Vector3 start, Vector3 end, out float hit)
+        private bool TraverseTiles(RcVec3f start, RcVec3f end, out float hit)
         {
             float relStartX = start.X - origin.X;
             float relStartZ = start.Z - origin.Z;
@@ -109,7 +108,7 @@ namespace DotRecast.Detour.Dynamic
             return false;
         }
 
-        private bool TraversHeightfield(int x, int z, Vector3 start, Vector3 end, float tMin, float tMax, out float hit)
+        private bool TraversHeightfield(int x, int z, RcVec3f start, RcVec3f end, float tMin, float tMax, out float hit)
         {
             RcHeightfield hf = heightfieldProvider.Invoke(x, z);
             if (null != hf)

src/DotRecast.Detour.Dynamic/Io/DtVoxelFile.cs

@@ -21,7 +21,6 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic.Io
@@ -55,7 +54,7 @@ namespace DotRecast.Detour.Dynamic.Io
         public bool useTiles;
         public int tileSizeX;
         public int tileSizeZ;
-        public Vector3 rotation = new Vector3();
+        public RcVec3f rotation = new RcVec3f();
         public float[] bounds = new float[6];
         public readonly List<DtVoxelTile> tiles = new List<DtVoxelTile>();
 

src/DotRecast.Detour.Dynamic/Io/DtVoxelFileReader.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Io;
 
 namespace DotRecast.Detour.Dynamic.Io
@@ -109,11 +108,11 @@ namespace DotRecast.Detour.Dynamic.Io
                 int width = buf.GetInt();
                 int depth = buf.GetInt();
                 int borderSize = buf.GetInt();
-                Vector3 boundsMin = new Vector3();
+                RcVec3f boundsMin = new RcVec3f();
                 boundsMin.X = buf.GetFloat();
                 boundsMin.Y = buf.GetFloat();
                 boundsMin.Z = buf.GetFloat();
-                Vector3 boundsMax = new Vector3();
+                RcVec3f boundsMax = new RcVec3f();
                 boundsMax.X = buf.GetFloat();
                 boundsMax.Y = buf.GetFloat();
                 boundsMax.Z = buf.GetFloat();

src/DotRecast.Detour.Dynamic/Io/DtVoxelFileWriter.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Io;
 
 namespace DotRecast.Detour.Dynamic.Io

src/DotRecast.Detour.Dynamic/Io/DtVoxelTile.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Dynamic.Io
@@ -33,13 +32,13 @@ namespace DotRecast.Detour.Dynamic.Io
         public readonly int borderSize;
         public int width;
         public int depth;
-        public readonly Vector3 boundsMin;
-        public Vector3 boundsMax;
+        public readonly RcVec3f boundsMin;
+        public RcVec3f boundsMax;
         public float cellSize;
         public float cellHeight;
         public readonly byte[] spanData;
 
-        public DtVoxelTile(int tileX, int tileZ, int width, int depth, Vector3 boundsMin, Vector3 boundsMax, float cellSize,
+        public DtVoxelTile(int tileX, int tileZ, int width, int depth, RcVec3f boundsMin, RcVec3f boundsMax, float cellSize,
             float cellHeight, int borderSize, RcByteBuffer buffer)
         {
             this.tileX = tileX;

src/DotRecast.Detour.Extras/BVTreeBuilder.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras
 {
@@ -41,8 +40,8 @@ namespace DotRecast.Detour.Extras
                 BVItem it = new BVItem();
                 items[i] = it;
                 it.i = i;
-                Vector3 bmin = RcVecUtils.Create(data.verts, data.polys[i].verts[0] * 3);
-                Vector3 bmax = RcVecUtils.Create(data.verts, data.polys[i].verts[0] * 3);
+                RcVec3f bmin = RcVecUtils.Create(data.verts, data.polys[i].verts[0] * 3);
+                RcVec3f bmax = RcVecUtils.Create(data.verts, data.polys[i].verts[0] * 3);
                 for (int j = 1; j < data.polys[i].vertCount; j++)
                 {
                     bmin = RcVecUtils.Min(bmin, data.verts, data.polys[i].verts[j] * 3);

src/DotRecast.Detour.Extras/DotRecast.Detour.Extras.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Detour.Extras</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Detour.Extras/Jumplink/AbstractGroundSampler.cs

@@ -1,13 +1,12 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
     public abstract class AbstractGroundSampler : IGroundSampler
     {
-        public delegate bool ComputeNavMeshHeight(Vector3 pt, float cellSize, out float height);
+        public delegate bool ComputeNavMeshHeight(RcVec3f pt, float cellSize, out float height);
 
         protected void SampleGround(JumpLinkBuilderConfig acfg, EdgeSampler es, ComputeNavMeshHeight heightFunc)
         {
@@ -34,7 +33,7 @@ namespace DotRecast.Detour.Extras.Jumplink
 
                 GroundSample s = new GroundSample();
                 seg.gsamples[i] = s;
-                Vector3 pt = Vector3.Lerp(seg.p, seg.q, u);
+                RcVec3f pt = RcVec3f.Lerp(seg.p, seg.q, u);
                 bool success = heightFunc.Invoke(pt, seg.height, out var height);
                 s.p.X = pt.X;
                 s.p.Y = height;

src/DotRecast.Detour.Extras/Jumplink/ClimbTrajectory.cs

@@ -1,14 +1,13 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
     public class ClimbTrajectory : Trajectory
     {
-        public override Vector3 Apply(Vector3 start, Vector3 end, float u)
+        public override RcVec3f Apply(RcVec3f start, RcVec3f end, float u)
         {
-            return new Vector3()
+            return new RcVec3f()
             {
                 X = Lerp(start.X, end.X, Math.Min(2f * u, 1f)),
                 Y = Lerp(start.Y, end.Y, Math.Max(0f, 2f * u - 1f)),

src/DotRecast.Detour.Extras/Jumplink/EdgeExtractor.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 using static DotRecast.Recast.RcConstants;
 
@@ -14,7 +13,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             List<JumpEdge> edges = new List<JumpEdge>();
             if (mesh != null)
             {
-                Vector3 orig = mesh.bmin;
+                RcVec3f orig = mesh.bmin;
                 float cs = mesh.cs;
                 float ch = mesh.ch;
                 for (int i = 0; i < mesh.npolys; i++)

src/DotRecast.Detour.Extras/Jumplink/EdgeSampler.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
@@ -10,20 +9,20 @@ namespace DotRecast.Detour.Extras.Jumplink
         public readonly List<GroundSegment> end = new List<GroundSegment>();
         public readonly Trajectory trajectory;
 
-        public readonly Vector3 ax = new Vector3();
-        public readonly Vector3 ay = new Vector3();
-        public readonly Vector3 az = new Vector3();
+        public readonly RcVec3f ax = new RcVec3f();
+        public readonly RcVec3f ay = new RcVec3f();
+        public readonly RcVec3f az = new RcVec3f();
 
         public EdgeSampler(JumpEdge edge, Trajectory trajectory)
         {
             this.trajectory = trajectory;
-            ax = Vector3.Subtract(edge.sq, edge.sp);
-            ax = Vector3.Normalize(ax);
+            ax = RcVec3f.Subtract(edge.sq, edge.sp);
+            ax = RcVec3f.Normalize(ax);
             
-            az = new Vector3(ax.Z, 0, -ax.X);
-            az = Vector3.Normalize(az);
+            az = new RcVec3f(ax.Z, 0, -ax.X);
+            az = RcVec3f.Normalize(az);
             
-            ay = new Vector3(0, 1, 0);
+            ay = new RcVec3f(0, 1, 0);
         }
     }
 }

src/DotRecast.Detour.Extras/Jumplink/EdgeSamplerFactory.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
@@ -30,8 +29,8 @@ namespace DotRecast.Detour.Extras.Jumplink
         {
             EdgeSampler es = new EdgeSampler(edge, new JumpTrajectory(acfg.jumpHeight));
             es.start.height = acfg.agentClimb * 2;
-            Vector3 offset = new Vector3();
-            Trans2d(ref offset, es.az, es.ay, new Vector2 { X = acfg.startDistance, Y = -acfg.agentClimb, });
+            RcVec3f offset = new RcVec3f();
+            Trans2d(ref offset, es.az, es.ay, new RcVec2f { X = acfg.startDistance, Y = -acfg.agentClimb, });
             Vadd(ref es.start.p, edge.sp, offset);
             Vadd(ref es.start.q, edge.sq, offset);
 
@@ -43,7 +42,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             {
                 float v = (float)j / (float)(nsamples - 1);
                 float ox = 2 * acfg.agentRadius + dx * v;
-                Trans2d(ref offset, es.az, es.ay, new Vector2 { X = ox, Y = acfg.minHeight });
+                Trans2d(ref offset, es.az, es.ay, new RcVec2f { X = ox, Y = acfg.minHeight });
                 GroundSegment end = new GroundSegment();
                 end.height = acfg.heightRange;
                 Vadd(ref end.p, edge.sp, offset);
@@ -58,12 +57,12 @@ namespace DotRecast.Detour.Extras.Jumplink
         {
             EdgeSampler es = new EdgeSampler(edge, new ClimbTrajectory());
             es.start.height = acfg.agentClimb * 2;
-            Vector3 offset = new Vector3();
-            Trans2d(ref offset, es.az, es.ay, new Vector2() { X = acfg.startDistance, Y = -acfg.agentClimb });
+            RcVec3f offset = new RcVec3f();
+            Trans2d(ref offset, es.az, es.ay, new RcVec2f() { X = acfg.startDistance, Y = -acfg.agentClimb });
             Vadd(ref es.start.p, edge.sp, offset);
             Vadd(ref es.start.q, edge.sq, offset);
 
-            Trans2d(ref offset, es.az, es.ay, new Vector2() { X = acfg.endDistance, Y = acfg.minHeight });
+            Trans2d(ref offset, es.az, es.ay, new RcVec2f() { X = acfg.endDistance, Y = acfg.minHeight });
             GroundSegment end = new GroundSegment();
             end.height = acfg.heightRange;
             Vadd(ref end.p, edge.sp, offset);
@@ -79,7 +78,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             dest[2] = v1[2] + v2[2];
         }
         
-        private void Vadd(ref Vector3 dest, Vector3 v1, Vector3 v2)
+        private void Vadd(ref RcVec3f dest, RcVec3f v1, RcVec3f v2)
         {
             dest.X = v1.X + v2.X;
             dest.Y = v1.Y + v2.Y;
@@ -94,7 +93,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             dst[2] = ax[2] * pt[0] + ay[2] * pt[1];
         }
         
-        private void Trans2d(ref Vector3 dst, Vector3 ax, Vector3 ay, Vector2 pt)
+        private void Trans2d(ref RcVec3f dst, RcVec3f ax, RcVec3f ay, RcVec2f pt)
         {
             dst.X = ax.X * pt.X + ay.X * pt.Y;
             dst.Y = ax.Y * pt.X + ay.Y * pt.Y;

src/DotRecast.Detour.Extras/Jumplink/GroundSample.cs

@@ -1,11 +1,10 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
     public class GroundSample
     {
-        public Vector3 p = new Vector3();
+        public RcVec3f p = new RcVec3f();
         public bool validTrajectory;
         public bool validHeight;
     }

src/DotRecast.Detour.Extras/Jumplink/GroundSegment.cs

@@ -1,12 +1,11 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
     public class GroundSegment
     {
-        public Vector3 p = new Vector3();
-        public Vector3 q = new Vector3();
+        public RcVec3f p = new RcVec3f();
+        public RcVec3f q = new RcVec3f();
         public GroundSample[] gsamples;
         public float height;
     }

src/DotRecast.Detour.Extras/Jumplink/JumpEdge.cs

@@ -1,11 +1,10 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
     public class JumpEdge
     {
-        public Vector3 sp = new Vector3();
-        public Vector3 sq = new Vector3();
+        public RcVec3f sp = new RcVec3f();
+        public RcVec3f sq = new RcVec3f();
     }
 }

src/DotRecast.Detour.Extras/Jumplink/JumpLinkBuilder.cs

@@ -3,7 +3,6 @@ using System.Collections.Generic;
 using System.Linq;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 namespace DotRecast.Detour.Extras.Jumplink
@@ -55,11 +54,11 @@ namespace DotRecast.Detour.Extras.Jumplink
             List<JumpLink> links = new List<JumpLink>();
             foreach (JumpSegment js in jumpSegments)
             {
-                Vector3 sp = es.start.gsamples[js.startSample].p;
-                Vector3 sq = es.start.gsamples[js.startSample + js.samples - 1].p;
+                RcVec3f sp = es.start.gsamples[js.startSample].p;
+                RcVec3f sq = es.start.gsamples[js.startSample + js.samples - 1].p;
                 GroundSegment end = es.end[js.groundSegment];
-                Vector3 ep = end.gsamples[js.startSample].p;
-                Vector3 eq = end.gsamples[js.startSample + js.samples - 1].p;
+                RcVec3f ep = end.gsamples[js.startSample].p;
+                RcVec3f eq = end.gsamples[js.startSample + js.samples - 1].p;
                 float d = Math.Min(RcVecUtils.Dist2DSqr(sp, sq), RcVecUtils.Dist2DSqr(ep, eq));
                 if (d >= 4 * acfg.agentRadius * acfg.agentRadius)
                 {
@@ -73,7 +72,7 @@ namespace DotRecast.Detour.Extras.Jumplink
                     for (int j = 0; j < link.nspine; ++j)
                     {
                         float u = ((float)j) / (link.nspine - 1);
-                        Vector3 p = es.trajectory.Apply(sp, ep, u);
+                        RcVec3f p = es.trajectory.Apply(sp, ep, u);
                         link.spine0[j * 3] = p.X;
                         link.spine0[j * 3 + 1] = p.Y;
                         link.spine0[j * 3 + 2] = p.Z;

src/DotRecast.Detour.Extras/Jumplink/JumpTrajectory.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
@@ -13,9 +12,9 @@ namespace DotRecast.Detour.Extras.Jumplink
             this.jumpHeight = jumpHeight;
         }
 
-        public override Vector3 Apply(Vector3 start, Vector3 end, float u)
+        public override RcVec3f Apply(RcVec3f start, RcVec3f end, float u)
         {
-            return new Vector3
+            return new RcVec3f
             {
                 X = Lerp(start.X, end.X, u), 
                 Y = InterpolateHeight(start.Y, end.Y, u),

src/DotRecast.Detour.Extras/Jumplink/NavMeshGroundSampler.cs

@@ -1,6 +1,5 @@
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 using DotRecast.Recast;
 
@@ -11,7 +10,7 @@ namespace DotRecast.Detour.Extras.Jumplink
         public override void Sample(JumpLinkBuilderConfig acfg, RcBuilderResult result, EdgeSampler es)
         {
             DtNavMeshQuery navMeshQuery = CreateNavMesh(result, acfg.agentRadius, acfg.agentHeight, acfg.agentClimb);
-            SampleGround(acfg, es, (Vector3 pt, float heightRange, out float height) => GetNavMeshHeight(navMeshQuery, pt, acfg.cellSize, heightRange, out height));
+            SampleGround(acfg, es, (RcVec3f pt, float heightRange, out float height) => GetNavMeshHeight(navMeshQuery, pt, acfg.cellSize, heightRange, out height));
         }
 
         private DtNavMeshQuery CreateNavMesh(RcBuilderResult r, float agentRadius, float agentHeight, float agentClimb)
@@ -41,11 +40,11 @@ namespace DotRecast.Detour.Extras.Jumplink
         }
 
 
-        private bool GetNavMeshHeight(DtNavMeshQuery navMeshQuery, Vector3 pt, float cs, float heightRange, out float height)
+        private bool GetNavMeshHeight(DtNavMeshQuery navMeshQuery, RcVec3f pt, float cs, float heightRange, out float height)
         {
             height = default;
 
-            Vector3 halfExtents = new Vector3 { X = cs, Y = heightRange, Z = cs };
+            RcVec3f halfExtents = new RcVec3f { X = cs, Y = heightRange, Z = cs };
             float maxHeight = pt.Y + heightRange;
             RcAtomicBoolean found = new RcAtomicBoolean();
             RcAtomicFloat minHeight = new RcAtomicFloat(pt.Y);

src/DotRecast.Detour.Extras/Jumplink/Trajectory.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Jumplink
 {
@@ -11,7 +10,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             return u * g + (1f - u) * f;
         }
 
-        public virtual Vector3 Apply(Vector3 start, Vector3 end, float u)
+        public virtual RcVec3f Apply(RcVec3f start, RcVec3f end, float u)
         {
             throw new NotImplementedException();
         }

src/DotRecast.Detour.Extras/Jumplink/TrajectorySampler.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 
 
@@ -33,7 +32,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             }
         }
 
-        private bool SampleTrajectory(JumpLinkBuilderConfig acfg, RcHeightfield solid, Vector3 pa, Vector3 pb, Trajectory tra)
+        private bool SampleTrajectory(JumpLinkBuilderConfig acfg, RcHeightfield solid, RcVec3f pa, RcVec3f pb, Trajectory tra)
         {
             float cs = Math.Min(acfg.cellSize, acfg.cellHeight);
             float d = RcVecUtils.Dist2D(pa, pb) + MathF.Abs(pa.Y - pb.Y);
@@ -41,7 +40,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             for (int i = 0; i < nsamples; ++i)
             {
                 float u = (float)i / (float)(nsamples - 1);
-                Vector3 p = tra.Apply(pa, pb, u);
+                RcVec3f p = tra.Apply(pa, pb, u);
                 if (CheckHeightfieldCollision(solid, p.X, p.Y + acfg.groundTolerance, p.Y + acfg.agentHeight, p.Z))
                 {
                     return false;
@@ -57,7 +56,7 @@ namespace DotRecast.Detour.Extras.Jumplink
             int h = solid.height;
             float cs = solid.cs;
             float ch = solid.ch;
-            Vector3 orig = solid.bmin;
+            RcVec3f orig = solid.bmin;
             int ix = (int)MathF.Floor((x - orig.X) / cs);
             int iz = (int)MathF.Floor((z - orig.Z) / cs);
 

src/DotRecast.Detour.Extras/Unity/Astar/GraphMeta.cs

@@ -17,7 +17,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Unity.Astar
 {

src/DotRecast.Detour.Extras/Unity/Astar/NodeLink2.cs

@@ -17,7 +17,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Unity.Astar
 {
@@ -26,10 +25,10 @@ namespace DotRecast.Detour.Extras.Unity.Astar
         public readonly long linkID;
         public readonly int startNode;
         public readonly int endNode;
-        public readonly Vector3 clamped1;
-        public readonly Vector3 clamped2;
+        public readonly RcVec3f clamped1;
+        public readonly RcVec3f clamped2;
 
-        public NodeLink2(long linkID, int startNode, int endNode, Vector3 clamped1, Vector3 clamped2) : base()
+        public NodeLink2(long linkID, int startNode, int endNode, RcVec3f clamped1, RcVec3f clamped2) : base()
         {
             this.linkID = linkID;
             this.startNode = startNode;

src/DotRecast.Detour.Extras/Unity/Astar/NodeLink2Reader.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 using System.IO.Compression;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Unity.Astar
 {
@@ -37,11 +36,11 @@ namespace DotRecast.Detour.Extras.Unity.Astar
                 int endNode = indexToNode[buffer.GetInt()];
                 int connectedNode1 = buffer.GetInt();
                 int connectedNode2 = buffer.GetInt();
-                Vector3 clamped1 = new Vector3();
+                RcVec3f clamped1 = new RcVec3f();
                 clamped1.X = buffer.GetFloat();
                 clamped1.Y = buffer.GetFloat();
                 clamped1.Z = buffer.GetFloat();
-                Vector3 clamped2 = new Vector3();
+                RcVec3f clamped2 = new RcVec3f();
                 clamped2.X = buffer.GetFloat();
                 clamped2.Y = buffer.GetFloat();
                 clamped2.Z = buffer.GetFloat();

src/DotRecast.Detour.Extras/Unity/Astar/OffMeshLinkCreator.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Extras.Unity.Astar
 {
@@ -49,7 +48,7 @@ namespace DotRecast.Detour.Extras.Unity.Astar
                         startTile.header.vertCount += 2;
                         DtOffMeshConnection connection = new DtOffMeshConnection();
                         connection.poly = poly;
-                        connection.pos = new Vector3[]
+                        connection.pos = new RcVec3f[]
                         {
                             l.clamped1, l.clamped2
                         };

src/DotRecast.Detour.Extras/Unity/Astar/ZipBinaryReader.cs

@@ -20,7 +20,6 @@ using System.IO;
 using System.IO.Compression;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Io;
 
 namespace DotRecast.Detour.Extras.Unity.Astar

src/DotRecast.Detour.TileCache/DotRecast.Detour.TileCache.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Detour.TileCache</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Detour.TileCache/DtTileCache.cs

@@ -22,7 +22,6 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.TileCache.Io;
 
 namespace DotRecast.Detour.TileCache
@@ -347,7 +346,7 @@ namespace DotRecast.Detour.TileCache
         }
 
         // Cylinder obstacle
-        public long AddObstacle(Vector3 pos, float radius, float height)
+        public long AddObstacle(RcVec3f pos, float radius, float height)
         {
             DtTileCacheObstacle ob = AllocObstacle();
             ob.type = DtTileCacheObstacleType.CYLINDER;
@@ -360,7 +359,7 @@ namespace DotRecast.Detour.TileCache
         }
 
         // Aabb obstacle
-        public long AddBoxObstacle(Vector3 bmin, Vector3 bmax)
+        public long AddBoxObstacle(RcVec3f bmin, RcVec3f bmax)
         {
             DtTileCacheObstacle ob = AllocObstacle();
             ob.type = DtTileCacheObstacleType.BOX;
@@ -372,7 +371,7 @@ namespace DotRecast.Detour.TileCache
         }
 
         // Box obstacle: can be rotated in Y
-        public long AddBoxObstacle(Vector3 center, Vector3 extents, float yRadians)
+        public long AddBoxObstacle(RcVec3f center, RcVec3f extents, float yRadians)
         {
             DtTileCacheObstacle ob = AllocObstacle();
             ob.type = DtTileCacheObstacleType.ORIENTED_BOX;
@@ -438,7 +437,7 @@ namespace DotRecast.Detour.TileCache
             return m_obstacles[i];
         }
 
-        private List<long> QueryTiles(Vector3 bmin, Vector3 bmax)
+        private List<long> QueryTiles(RcVec3f bmin, RcVec3f bmax)
         {
             List<long> results = new List<long>();
             float tw = m_params.width * m_params.cs;
@@ -455,8 +454,8 @@ namespace DotRecast.Detour.TileCache
                     foreach (long i in tiles)
                     {
                         DtCompressedTile tile = m_tiles[DecodeTileIdTile(i)];
-                        Vector3 tbmin = new Vector3();
-                        Vector3 tbmax = new Vector3();
+                        RcVec3f tbmin = new RcVec3f();
+                        RcVec3f tbmax = new RcVec3f();
                         CalcTightTileBounds(tile.header, ref tbmin, ref tbmax);
                         if (DtUtils.OverlapBounds(bmin, bmax, tbmin, tbmax))
                         {
@@ -499,8 +498,8 @@ namespace DotRecast.Detour.TileCache
                     if (req.action == DtObstacleRequestAction.REQUEST_ADD)
                     {
                         // Find touched tiles.
-                        Vector3 bmin = new Vector3();
-                        Vector3 bmax = new Vector3();
+                        RcVec3f bmin = new RcVec3f();
+                        RcVec3f bmax = new RcVec3f();
                         GetObstacleBounds(ob, ref bmin, ref bmax);
                         ob.touched = QueryTiles(bmin, bmax);
                         // Add tiles to update list.
@@ -681,7 +680,7 @@ namespace DotRecast.Detour.TileCache
             return layer;
         }
 
-        void CalcTightTileBounds(DtTileCacheLayerHeader header, ref Vector3 bmin, ref Vector3 bmax)
+        void CalcTightTileBounds(DtTileCacheLayerHeader header, ref RcVec3f bmin, ref RcVec3f bmax)
         {
             float cs = m_params.cs;
             bmin.X = header.bmin.X + header.minx * cs;
@@ -692,7 +691,7 @@ namespace DotRecast.Detour.TileCache
             bmax.Z = header.bmin.Z + (header.maxy + 1) * cs;
         }
 
-        public void GetObstacleBounds(DtTileCacheObstacle ob, ref Vector3 bmin, ref Vector3 bmax)
+        public void GetObstacleBounds(DtTileCacheObstacle ob, ref RcVec3f bmin, ref RcVec3f bmax)
         {
             if (ob.type == DtTileCacheObstacleType.CYLINDER)
             {

src/DotRecast.Detour.TileCache/DtTileCacheBuilder.cs

@@ -23,9 +23,8 @@ using System.Collections.Generic;
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.TileCache.Io;
-using DotRecast.Detour.TileCache.Io.Compress;
+using DotRecast.Recast;
 
 
 namespace DotRecast.Detour.TileCache
@@ -47,10 +46,10 @@ namespace DotRecast.Detour.TileCache
 
             Array.Fill(layer.regs, (short)0x00FF);
             int nsweeps = w;
-            DtLayerSweepSpan[] sweeps = new DtLayerSweepSpan[nsweeps];
+            RcLayerSweepSpan[] sweeps = new RcLayerSweepSpan[nsweeps];
             for (int i = 0; i < sweeps.Length; i++)
             {
-                sweeps[i] = new DtLayerSweepSpan();
+                sweeps[i] = new RcLayerSweepSpan();
             }
 
             // Partition walkable area into monotone regions.
@@ -1802,10 +1801,10 @@ namespace DotRecast.Detour.TileCache
             return mesh;
         }
 
-        public void MarkCylinderArea(DtTileCacheLayer layer, Vector3 orig, float cs, float ch, Vector3 pos, float radius, float height, int areaId)
+        public void MarkCylinderArea(DtTileCacheLayer layer, RcVec3f orig, float cs, float ch, RcVec3f pos, float radius, float height, int areaId)
         {
-            Vector3 bmin = new Vector3();
-            Vector3 bmax = new Vector3();
+            RcVec3f bmin = new RcVec3f();
+            RcVec3f bmax = new RcVec3f();
             bmin.X = pos.X - radius;
             bmin.Y = pos.Y;
             bmin.Z = pos.Z - radius;
@@ -1863,7 +1862,7 @@ namespace DotRecast.Detour.TileCache
             }
         }
 
-        public void MarkBoxArea(DtTileCacheLayer layer, Vector3 orig, float cs, float ch, Vector3 bmin, Vector3 bmax, int areaId)
+        public void MarkBoxArea(DtTileCacheLayer layer, RcVec3f orig, float cs, float ch, RcVec3f bmin, RcVec3f bmax, int areaId)
         {
             int w = layer.header.width;
             int h = layer.header.height;
@@ -1991,7 +1990,7 @@ namespace DotRecast.Detour.TileCache
             return layer;
         }
 
-        public void MarkBoxArea(DtTileCacheLayer layer, Vector3 orig, float cs, float ch, Vector3 center, Vector3 extents,
+        public void MarkBoxArea(DtTileCacheLayer layer, RcVec3f orig, float cs, float ch, RcVec3f center, RcVec3f extents,
             float[] rotAux, int areaId)
         {
             int w = layer.header.width;

src/DotRecast.Detour.TileCache/DtTileCacheLayerBuilder.cs

@@ -24,7 +24,6 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.TileCache.Io.Compress;
 using DotRecast.Recast;
 using DotRecast.Recast.Geom;
@@ -88,8 +87,8 @@ namespace DotRecast.Detour.TileCache
         protected virtual RcHeightfieldLayerSet BuildHeightfieldLayerSet(IInputGeomProvider geom, RcConfig cfg, int tx, int ty)
         {
             RcBuilder rcBuilder = new RcBuilder();
-            Vector3 bmin = geom.GetMeshBoundsMin();
-            Vector3 bmax = geom.GetMeshBoundsMax();
+            RcVec3f bmin = geom.GetMeshBoundsMin();
+            RcVec3f bmax = geom.GetMeshBoundsMax();
             RcBuilderConfig builderCfg = new RcBuilderConfig(cfg, bmin, bmax, tx, ty);
             RcHeightfieldLayerSet lset = rcBuilder.BuildLayers(geom, builderCfg);
             return lset;

src/DotRecast.Detour.TileCache/DtTileCacheLayerHeader.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.TileCache
 {
@@ -32,8 +31,8 @@ namespace DotRecast.Detour.TileCache
         public int version; // < Data version
         public int tx, ty, tlayer;
 
-        public Vector3 bmin = new Vector3();
-        public Vector3 bmax = new Vector3();
+        public RcVec3f bmin = new RcVec3f();
+        public RcVec3f bmax = new RcVec3f();
         public int hmin, hmax; // < Height min/max range
         public int width, height; // < Dimension of the layer.
         public int minx, maxx, miny, maxy; // < Usable sub-region.

src/DotRecast.Detour.TileCache/DtTileCacheObstacle.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.TileCache
 {
@@ -28,12 +27,12 @@ namespace DotRecast.Detour.TileCache
     {
         public readonly int index;
         public DtTileCacheObstacleType type;
-        public Vector3 pos = new Vector3();
-        public Vector3 bmin = new Vector3();
-        public Vector3 bmax = new Vector3();
+        public RcVec3f pos = new RcVec3f();
+        public RcVec3f bmin = new RcVec3f();
+        public RcVec3f bmax = new RcVec3f();
         public float radius, height;
-        public Vector3 center = new Vector3();
-        public Vector3 extents = new Vector3();
+        public RcVec3f center = new RcVec3f();
+        public RcVec3f extents = new RcVec3f();
         public readonly float[] rotAux = new float[2]; // { Cos(0.5f*angle)*Sin(-0.5f*angle); Cos(0.5f*angle)*Cos(0.5f*angle) - 0.5 }
         
         public List<long> touched = new List<long>();

src/DotRecast.Detour.TileCache/DtTileCacheParams.cs

@@ -19,13 +19,12 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.TileCache
 {
     public struct DtTileCacheParams
     {
-        public Vector3 orig;
+        public RcVec3f orig;
         public float cs, ch;
         public int width, height;
         public float walkableHeight;

src/DotRecast.Detour/DotRecast.Detour.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Detour</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Detour/DtConvexConvexIntersections.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -38,10 +37,10 @@ namespace DotRecast.Detour
             float[] inters = new float[Math.Max(m, n) * 3 * 3];
             int ii = 0;
             /* Initialize variables. */
-            Vector3 a = new Vector3();
-            Vector3 b = new Vector3();
-            Vector3 a1 = new Vector3();
-            Vector3 b1 = new Vector3();
+            RcVec3f a = new RcVec3f();
+            RcVec3f b = new RcVec3f();
+            RcVec3f a1 = new RcVec3f();
+            RcVec3f b1 = new RcVec3f();
 
             int aa = 0;
             int ba = 0;
@@ -50,8 +49,8 @@ namespace DotRecast.Detour
 
             DtConvexConvexInFlag f = DtConvexConvexInFlag.Unknown;
             bool firstPoint = true;
-            Vector3 ip = new Vector3();
-            Vector3 iq = new Vector3();
+            RcVec3f ip = new RcVec3f();
+            RcVec3f iq = new RcVec3f();
 
             do
             {
@@ -60,8 +59,8 @@ namespace DotRecast.Detour
                 a1 = RcVecUtils.Create(p, 3 * ((ai + n - 1) % n)); // prev a
                 b1 = RcVecUtils.Create(q, 3 * ((bi + m - 1) % m)); // prev b
 
-                Vector3 A = Vector3.Subtract(a, a1);
-                Vector3 B = Vector3.Subtract(b, b1);
+                RcVec3f A = RcVec3f.Subtract(a, a1);
+                RcVec3f B = RcVec3f.Subtract(b, b1);
 
                 float cross = B.X * A.Z - A.X * B.Z; // TriArea2D({0, 0}, A, B);
                 float aHB = DtUtils.TriArea2D(b1, b, a);
@@ -177,7 +176,7 @@ namespace DotRecast.Detour
             return copied;
         }
 
-        private static int AddVertex(float[] inters, int ii, Vector3 p)
+        private static int AddVertex(float[] inters, int ii, RcVec3f p)
         {
             if (ii > 0)
             {
@@ -213,7 +212,7 @@ namespace DotRecast.Detour
             return inflag;
         }
 
-        private static DtConvexConvexIntersection SegSegInt(Vector3 a, Vector3 b, Vector3 c, Vector3 d, ref Vector3 p, ref Vector3 q)
+        private static DtConvexConvexIntersection SegSegInt(RcVec3f a, RcVec3f b, RcVec3f c, RcVec3f d, ref RcVec3f p, ref RcVec3f q)
         {
             if (DtUtils.IntersectSegSeg2D(a, b, c, d, out var s, out var t))
             {
@@ -229,7 +228,7 @@ namespace DotRecast.Detour
             return DtConvexConvexIntersection.None;
         }
 
-        private static DtConvexConvexIntersection ParallelInt(Vector3 a, Vector3 b, Vector3 c, Vector3 d, ref Vector3 p, ref Vector3 q)
+        private static DtConvexConvexIntersection ParallelInt(RcVec3f a, RcVec3f b, RcVec3f c, RcVec3f d, ref RcVec3f p, ref RcVec3f q)
         {
             if (Between(a, b, c) && Between(a, b, d))
             {
@@ -276,7 +275,7 @@ namespace DotRecast.Detour
             return DtConvexConvexIntersection.None;
         }
 
-        private static bool Between(Vector3 a, Vector3 b, Vector3 c)
+        private static bool Between(RcVec3f a, RcVec3f b, RcVec3f c)
         {
             if (MathF.Abs(a.X - b.X) > MathF.Abs(a.Z - b.Z))
             {

src/DotRecast.Detour/DtDefaultQueryHeuristic.cs

@@ -18,7 +18,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 
 namespace DotRecast.Detour
@@ -35,9 +34,9 @@ namespace DotRecast.Detour
             this.scale = scale;
         }
 
-        public float GetCost(Vector3 neighbourPos, Vector3 endPos)
+        public float GetCost(RcVec3f neighbourPos, RcVec3f endPos)
         {
-            return Vector3.Distance(neighbourPos, endPos) * scale;
+            return RcVec3f.Distance(neighbourPos, endPos) * scale;
         }
     }
 }

src/DotRecast.Detour/DtFindNearestPolyQuery.cs

@@ -1,19 +1,18 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
     public class DtFindNearestPolyQuery : IDtPolyQuery
     {
         private readonly DtNavMeshQuery _query;
-        private readonly Vector3 _center;
+        private readonly RcVec3f _center;
         private long _nearestRef;
-        private Vector3 _nearestPt;
+        private RcVec3f _nearestPt;
         private bool _overPoly;
         private float _nearestDistanceSqr;
 
-        public DtFindNearestPolyQuery(DtNavMeshQuery query, Vector3 center)
+        public DtFindNearestPolyQuery(DtNavMeshQuery query, RcVec3f center)
         {
             this._query = query;
             this._center = center;
@@ -29,7 +28,7 @@ namespace DotRecast.Detour
             // If a point is directly over a polygon and closer than
             // climb height, favor that instead of straight line nearest point.
             float d = 0;
-            Vector3 diff = Vector3.Subtract(_center, closestPtPoly);
+            RcVec3f diff = RcVec3f.Subtract(_center, closestPtPoly);
             if (posOverPoly)
             {
                 d = MathF.Abs(diff.Y) - tile.data.header.walkableClimb;
@@ -54,7 +53,7 @@ namespace DotRecast.Detour
             return _nearestRef;
         }
 
-        public Vector3 NearestPt()
+        public RcVec3f NearestPt()
         {
             return _nearestPt;
         }

src/DotRecast.Detour/DtMeshHeader.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -81,10 +80,10 @@ namespace DotRecast.Detour
         public float walkableClimb;
 
         /** The minimum bounds of the tile's AABB. [(x, y, z)] */
-        public Vector3 bmin = new Vector3();
+        public RcVec3f bmin = new RcVec3f();
 
         /** The maximum bounds of the tile's AABB. [(x, y, z)] */
-        public Vector3 bmax = new Vector3();
+        public RcVec3f bmax = new RcVec3f();
 
         /** The bounding volume quantization factor. */
         public float bvQuantFactor;

src/DotRecast.Detour/DtNavMesh.cs

@@ -22,7 +22,6 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -70,7 +69,7 @@ namespace DotRecast.Detour
         private readonly DtNavMeshParams m_params;
 
         /// < Current initialization params. TODO: do not store this info twice.
-        private readonly Vector3 m_orig;
+        private readonly RcVec3f m_orig;
 
         /// < Origin of the tile (0,0)
         // float m_orig[3]; ///< Origin of the tile (0,0)
@@ -258,7 +257,7 @@ namespace DotRecast.Detour
      *            The world position for the query. [(x, y, z)]
      * @return 2-element int array with (tx,ty) tile location
      */
-        public void CalcTileLoc(Vector3 pos, out int tx, out int ty)
+        public void CalcTileLoc(RcVec3f pos, out int tx, out int ty)
         {
             tx = (int)MathF.Floor((pos.X - m_orig.X) / m_tileWidth);
             ty = (int)MathF.Floor((pos.Z - m_orig.Z) / m_tileHeight);
@@ -285,7 +284,7 @@ namespace DotRecast.Detour
                 return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
             }
 
-            if (m_tiles[it].salt != salt || m_tiles[it].data.header == null)
+            if (m_tiles[it].salt != salt || m_tiles[it].data == null || m_tiles[it].data.header == null)
             {
                 return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
             }
@@ -349,7 +348,7 @@ namespace DotRecast.Detour
         // TODO: These methods are duplicates from dtNavMeshQuery, but are needed
         // for off-mesh connection finding.
 
-        List<long> QueryPolygonsInTile(DtMeshTile tile, Vector3 qmin, Vector3 qmax)
+        List<long> QueryPolygonsInTile(DtMeshTile tile, RcVec3f qmin, RcVec3f qmax)
         {
             List<long> polys = new List<long>();
             if (tile.data.bvTree != null)
@@ -405,8 +404,8 @@ namespace DotRecast.Detour
             }
             else
             {
-                Vector3 bmin = new Vector3();
-                Vector3 bmax = new Vector3();
+                RcVec3f bmin = new RcVec3f();
+                RcVec3f bmax = new RcVec3f();
                 long @base = GetPolyRefBase(tile);
                 for (int i = 0; i < tile.data.header.polyCount; ++i)
                 {
@@ -694,6 +693,7 @@ namespace DotRecast.Detour
             }
         }
 
+        /// Removes external links at specified side.V
         void UnconnectLinks(DtMeshTile tile, DtMeshTile target)
         {
             if (tile == null || target == null)
@@ -736,6 +736,7 @@ namespace DotRecast.Detour
             }
         }
 
+        /// Builds external polygon links for a tile.
         void ConnectExtLinks(DtMeshTile tile, DtMeshTile target, int side)
         {
             if (tile == null)
@@ -821,6 +822,7 @@ namespace DotRecast.Detour
             }
         }
 
+        /// Builds external polygon links for a tile.
         void ConnectExtOffMeshLinks(DtMeshTile tile, DtMeshTile target, int side)
         {
             if (tile == null)
@@ -848,7 +850,7 @@ namespace DotRecast.Detour
                     continue;
                 }
 
-                var ext = new Vector3()
+                var ext = new RcVec3f()
                 {
                     X = targetCon.rad,
                     Y = target.data.header.walkableClimb,
@@ -856,7 +858,7 @@ namespace DotRecast.Detour
                 };
 
                 // Find polygon to connect to.
-                Vector3 p = targetCon.pos[1];
+                RcVec3f p = targetCon.pos[1];
                 var refs = FindNearestPolyInTile(tile, p, ext, out var nearestPt);
                 if (refs == 0)
                 {
@@ -913,14 +915,14 @@ namespace DotRecast.Detour
 
             cons.Clear();
 
-            Vector2 amin = Vector2.Zero;
-            Vector2 amax = Vector2.Zero;
+            RcVec2f amin = RcVec2f.Zero;
+            RcVec2f amax = RcVec2f.Zero;
             CalcSlabEndPoints(verts, va, vb, ref amin, ref amax, side);
             float apos = GetSlabCoord(verts, va, side);
 
             // Remove links pointing to 'side' and compact the links array.
-            Vector2 bmin = Vector2.Zero;
-            Vector2 bmax = Vector2.Zero;
+            RcVec2f bmin = RcVec2f.Zero;
+            RcVec2f bmax = RcVec2f.Zero;
             int m = DT_EXT_LINK | side;
             int n = 0;
             long @base = GetPolyRefBase(tile);
@@ -981,7 +983,7 @@ namespace DotRecast.Detour
             return 0;
         }
 
-        static void CalcSlabEndPoints(float[] verts, int va, int vb, ref Vector2 bmin, ref Vector2 bmax, int side)
+        static void CalcSlabEndPoints(float[] verts, int va, int vb, ref RcVec2f bmin, ref RcVec2f bmax, int side)
         {
             if (side == 0 || side == 4)
             {
@@ -1019,7 +1021,7 @@ namespace DotRecast.Detour
             }
         }
 
-        bool OverlapSlabs(Vector2 amin, Vector2 amax, Vector2 bmin, Vector2 bmax, float px, float py)
+        bool OverlapSlabs(RcVec2f amin, RcVec2f amax, RcVec2f bmin, RcVec2f bmax, float px, float py)
         {
             // Check for horizontal overlap.
             // The segment is shrunken a little so that slabs which touch
@@ -1059,11 +1061,7 @@ namespace DotRecast.Detour
             return false;
         }
 
-        /**
-     * Builds internal polygons links for a tile.
-     *
-     * @param tile
-     */
+        /// Builds internal polygons links for a tile.
         void BaseOffMeshLinks(DtMeshTile tile)
         {
             if (tile == null)
@@ -1079,7 +1077,7 @@ namespace DotRecast.Detour
                 DtOffMeshConnection con = tile.data.offMeshCons[i];
                 DtPoly poly = tile.data.polys[con.poly];
 
-                var ext = new Vector3()
+                var ext = new RcVec3f()
                 {
                     X = con.rad,
                     Y = tile.data.header.walkableClimb,
@@ -1093,7 +1091,7 @@ namespace DotRecast.Detour
                     continue;
                 }
 
-                Vector3[] p = con.pos; // First vertex
+                RcVec3f[] p = con.pos; // First vertex
                 // findNearestPoly may return too optimistic results, further check
                 // to make sure.
                 if (RcMath.Sqr(nearestPt.X - p[0].X) + RcMath.Sqr(nearestPt.Z - p[0].Z) > RcMath.Sqr(con.rad))
@@ -1139,7 +1137,7 @@ namespace DotRecast.Detour
      * @param pos
      * @return
      */
-        Vector3 ClosestPointOnDetailEdges(DtMeshTile tile, DtPoly poly, Vector3 pos, bool onlyBoundary)
+        RcVec3f ClosestPointOnDetailEdges(DtMeshTile tile, DtPoly poly, RcVec3f pos, bool onlyBoundary)
         {
             int ANY_BOUNDARY_EDGE = (DtDetailTriEdgeFlags.DT_DETAIL_EDGE_BOUNDARY << 0) |
                                     (DtDetailTriEdgeFlags.DT_DETAIL_EDGE_BOUNDARY << 2) |
@@ -1147,8 +1145,8 @@ namespace DotRecast.Detour
             int ip = poly.index;
             float dmin = float.MaxValue;
             float tmin = 0;
-            Vector3 pmin = new Vector3();
-            Vector3 pmax = new Vector3();
+            RcVec3f pmin = new RcVec3f();
+            RcVec3f pmax = new RcVec3f();
 
             if (tile.data.detailMeshes != null)
             {
@@ -1162,13 +1160,13 @@ namespace DotRecast.Detour
                         continue;
                     }
 
-                    Vector3[] v = new Vector3[3];
+                    RcVec3f[] v = new RcVec3f[3];
                     for (int j = 0; j < 3; ++j)
                     {
                         if (tris[ti + j] < poly.vertCount)
                         {
                             int index = poly.verts[tris[ti + j]] * 3;
-                            v[j] = new Vector3
+                            v[j] = new RcVec3f
                             {
                                 X = tile.data.verts[index],
                                 Y = tile.data.verts[index + 1],
@@ -1178,7 +1176,7 @@ namespace DotRecast.Detour
                         else
                         {
                             int index = (pd.vertBase + (tris[ti + j] - poly.vertCount)) * 3;
-                            v[j] = new Vector3
+                            v[j] = new RcVec3f
                             {
                                 X = tile.data.detailVerts[index],
                                 Y = tile.data.detailVerts[index + 1],
@@ -1210,7 +1208,7 @@ namespace DotRecast.Detour
             }
             else
             {
-                Vector3[] v = new Vector3[2];
+                RcVec3f[] v = new RcVec3f[2];
                 for (int j = 0; j < poly.vertCount; ++j)
                 {
                     int k = (j + 1) % poly.vertCount;
@@ -1232,10 +1230,10 @@ namespace DotRecast.Detour
                 }
             }
 
-            return Vector3.Lerp(pmin, pmax, tmin);
+            return RcVec3f.Lerp(pmin, pmax, tmin);
         }
 
-        public bool GetPolyHeight(DtMeshTile tile, DtPoly poly, Vector3 pos, out float height)
+        public bool GetPolyHeight(DtMeshTile tile, DtPoly poly, RcVec3f pos, out float height)
         {
             height = 0;
 
@@ -1267,13 +1265,13 @@ namespace DotRecast.Detour
                 for (int j = 0; j < pd.triCount; ++j)
                 {
                     int t = (pd.triBase + j) * 4;
-                    Vector3[] v = new Vector3[3];
+                    RcVec3f[] v = new RcVec3f[3];
                     for (int k = 0; k < 3; ++k)
                     {
                         if (tile.data.detailTris[t + k] < poly.vertCount)
                         {
                             int index = poly.verts[tile.data.detailTris[t + k]] * 3;
-                            v[k] = new Vector3
+                            v[k] = new RcVec3f
                             {
                                 X = tile.data.verts[index],
                                 Y = tile.data.verts[index + 1],
@@ -1283,7 +1281,7 @@ namespace DotRecast.Detour
                         else
                         {
                             int index = (pd.vertBase + (tile.data.detailTris[t + k] - poly.vertCount)) * 3;
-                            v[k] = new Vector3
+                            v[k] = new RcVec3f
                             {
                                 X = tile.data.detailVerts[index],
                                 Y = tile.data.detailVerts[index + 1],
@@ -1301,7 +1299,7 @@ namespace DotRecast.Detour
             }
             else
             {
-                Vector3[] v = new Vector3[3];
+                RcVec3f[] v = new RcVec3f[3];
                 v[0].X = tile.data.verts[poly.verts[0] * 3];
                 v[0].Y = tile.data.verts[poly.verts[0] * 3 + 1];
                 v[0].Z = tile.data.verts[poly.verts[0] * 3 + 2];
@@ -1331,7 +1329,7 @@ namespace DotRecast.Detour
             return true;
         }
 
-        public void ClosestPointOnPoly(long refs, Vector3 pos, out Vector3 closest, out bool posOverPoly)
+        public void ClosestPointOnPoly(long refs, RcVec3f pos, out RcVec3f closest, out bool posOverPoly)
         {
             GetTileAndPolyByRefUnsafe(refs, out var tile, out var poly);
             closest = pos;
@@ -1349,11 +1347,11 @@ namespace DotRecast.Detour
             if (poly.GetPolyType() == DtPolyTypes.DT_POLYTYPE_OFFMESH_CONNECTION)
             {
                 int i = poly.verts[0] * 3;
-                var v0 = new Vector3 { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
+                var v0 = new RcVec3f { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
                 i = poly.verts[1] * 3;
-                var v1 = new Vector3 { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
+                var v1 = new RcVec3f { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
                 DtUtils.DistancePtSegSqr2D(pos, v0, v1, out var t);
-                closest = Vector3.Lerp(v0, v1, t);
+                closest = RcVec3f.Lerp(v0, v1, t);
                 return;
             }
 
@@ -1362,13 +1360,13 @@ namespace DotRecast.Detour
         }
 
         /// Find nearest polygon within a tile.
-        private long FindNearestPolyInTile(DtMeshTile tile, Vector3 center, Vector3 halfExtents, out Vector3 nearestPt)
+        private long FindNearestPolyInTile(DtMeshTile tile, RcVec3f center, RcVec3f halfExtents, out RcVec3f nearestPt)
         {
-            nearestPt = Vector3.Zero;
+            nearestPt = RcVec3f.Zero;
 
             bool overPoly = false;
-            Vector3 bmin = Vector3.Subtract(center, halfExtents);
-            Vector3 bmax = Vector3.Add(center, halfExtents);
+            RcVec3f bmin = RcVec3f.Subtract(center, halfExtents);
+            RcVec3f bmax = RcVec3f.Add(center, halfExtents);
 
             // Get nearby polygons from proximity grid.
             List<long> polys = QueryPolygonsInTile(tile, bmin, bmax);
@@ -1384,7 +1382,7 @@ namespace DotRecast.Detour
 
                 // If a point is directly over a polygon and closer than
                 // climb height, favor that instead of straight line nearest point.
-                Vector3 diff = Vector3.Subtract(center, closestPtPoly);
+                RcVec3f diff = RcVec3f.Subtract(center, closestPtPoly);
                 if (posOverPoly)
                 {
                     d = MathF.Abs(diff.Y) - tile.data.header.walkableClimb;
@@ -1533,7 +1531,7 @@ namespace DotRecast.Detour
         /// inside a normal polygon. So an off-mesh connection is "entered" from a 
         /// normal polygon at one of its endpoints. This is the polygon identified by 
         /// the prevRef parameter.
-        public DtStatus GetOffMeshConnectionPolyEndPoints(long prevRef, long polyRef, ref Vector3 startPos, ref Vector3 endPos)
+        public DtStatus GetOffMeshConnectionPolyEndPoints(long prevRef, long polyRef, ref RcVec3f startPos, ref RcVec3f endPos)
         {
             if (polyRef == 0)
             {
@@ -1736,9 +1734,9 @@ namespace DotRecast.Detour
             return DtStatus.DT_SUCCESS;
         }
 
-        public Vector3 GetPolyCenter(long refs)
+        public RcVec3f GetPolyCenter(long refs)
         {
-            Vector3 center = Vector3.Zero;
+            RcVec3f center = RcVec3f.Zero;
 
             var status = GetTileAndPolyByRef(refs, out var tile, out var poly);
             if (status.Succeeded())
@@ -1786,10 +1784,10 @@ namespace DotRecast.Detour
             return tiles;
         }
 
-        public void ComputeBounds(out Vector3 bmin, out Vector3 bmax)
+        public void ComputeBounds(out RcVec3f bmin, out RcVec3f bmax)
         {
-            bmin = new Vector3(float.PositiveInfinity, float.PositiveInfinity, float.PositiveInfinity);
-            bmax = new Vector3(float.NegativeInfinity, float.NegativeInfinity, float.NegativeInfinity);
+            bmin = new RcVec3f(float.PositiveInfinity, float.PositiveInfinity, float.PositiveInfinity);
+            bmax = new RcVec3f(float.NegativeInfinity, float.NegativeInfinity, float.NegativeInfinity);
             for (int t = 0; t < GetMaxTiles(); ++t)
             {
                 DtMeshTile tile = GetTile(t);

src/DotRecast.Detour/DtNavMeshBuilder.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -221,7 +220,7 @@ namespace DotRecast.Detour
         const int XM = 1 << 2;
         const int ZM = 1 << 3;
 
-        public static int ClassifyOffMeshPoint(Vector3 pt, Vector3 bmin, Vector3 bmax)
+        public static int ClassifyOffMeshPoint(RcVec3f pt, RcVec3f bmin, RcVec3f bmax)
         {
             int outcode = 0;
             outcode |= (pt.X >= bmax.X) ? XP : 0;
@@ -308,8 +307,8 @@ namespace DotRecast.Detour
 
                 hmin -= option.walkableClimb;
                 hmax += option.walkableClimb;
-                Vector3 bmin = new Vector3();
-                Vector3 bmax = new Vector3();
+                RcVec3f bmin = new RcVec3f();
+                RcVec3f bmax = new RcVec3f();
                 bmin = option.bmin;
                 bmax = option.bmax;
                 bmin.Y = hmin;

src/DotRecast.Detour/DtNavMeshCreateParams.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -91,8 +90,8 @@ namespace DotRecast.Detour
         public int tileX; // < The tile's x-grid location within the multi-tile destination mesh. (Along the x-axis.)
         public int tileZ; // < The tile's y-grid location within the multi-tile destination mesh. (Along the z-axis.)
         public int tileLayer; // < The tile's layer within the layered destination mesh. [Limit: >= 0] (Along the y-axis.)
-        public Vector3 bmin; // < The minimum bounds of the tile. [(x, y, z)] [Unit: wu]
-        public Vector3 bmax; // < The maximum bounds of the tile. [(x, y, z)] [Unit: wu]
+        public RcVec3f bmin; // < The minimum bounds of the tile. [(x, y, z)] [Unit: wu]
+        public RcVec3f bmax; // < The maximum bounds of the tile. [(x, y, z)] [Unit: wu]
 
         /// @}
         /// @name General Configuration Attributes

src/DotRecast.Detour/DtNavMeshParams.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -32,7 +31,7 @@ namespace DotRecast.Detour
     public struct DtNavMeshParams
     {
         /** The world space origin of the navigation mesh's tile space. [(x, y, z)] */
-        public Vector3 orig;
+        public RcVec3f orig;
 
         /** The width of each tile. (Along the x-axis.) */
         public float tileWidth;

src/DotRecast.Detour/DtNavMeshQuery.cs

@@ -23,7 +23,6 @@ using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -32,14 +31,17 @@ namespace DotRecast.Detour
         /// < Add a vertex at every polygon edge crossing.
         protected readonly DtNavMesh m_nav;
 
+        protected readonly DtNodePool m_tinyNodePool;
         protected readonly DtNodePool m_nodePool;
         protected readonly DtNodeQueue m_openList;
+
         protected DtQueryData m_query;
 
         /// < Sliced query state.
         public DtNavMeshQuery(DtNavMesh nav)
         {
             m_nav = nav;
+            m_tinyNodePool = new DtNodePool();
             m_nodePool = new DtNodePool();
             m_openList = new DtNodeQueue();
         }
@@ -51,10 +53,10 @@ namespace DotRecast.Detour
         ///  @param[out]	randomRef		The reference id of the random location.
         ///  @param[out]	randomPt		The random location. 
         /// @returns The status flags for the query.
-        public DtStatus FindRandomPoint(IDtQueryFilter filter, IRcRand frand, out long randomRef, out Vector3 randomPt)
+        public DtStatus FindRandomPoint(IDtQueryFilter filter, IRcRand frand, out long randomRef, out RcVec3f randomPt)
         {
             randomRef = 0;
-            randomPt = Vector3.Zero;
+            randomPt = RcVec3f.Zero;
 
             if (null == filter || null == frand)
             {
@@ -155,24 +157,19 @@ namespace DotRecast.Detour
             return DtStatus.DT_SUCCESS;
         }
 
-        /**
-     * Returns random location on navmesh within the reach of specified location. Polygons are chosen weighted by area.
-     * The search runs in linear related to number of polygon. The location is not exactly constrained by the circle,
-     * but it limits the visited polygons.
-     *
-     * @param startRef
-     *            The reference id of the polygon where the search starts.
-     * @param centerPos
-     *            The center of the search circle. [(x, y, z)]
-     * @param maxRadius
-     * @param filter
-     *            The polygon filter to apply to the query.
-     * @param frand
-     *            Function returning a random number [0..1).
-     * @return Random location
-     */
-        public DtStatus FindRandomPointAroundCircle(long startRef, Vector3 centerPos, float maxRadius,
-            IDtQueryFilter filter, IRcRand frand, out long randomRef, out Vector3 randomPt)
+        /// Returns random location on navmesh within the reach of specified location.
+        /// Polygons are chosen weighted by area. The search runs in linear related to number of polygon.
+        /// The location is not exactly constrained by the circle, but it limits the visited polygons.
+        ///  @param[in]		startRef		The reference id of the polygon where the search starts.
+        ///  @param[in]		centerPos		The center of the search circle. [(x, y, z)]
+        ///  @param[in]		maxRadius		The radius of the search circle. [Units: wu]
+        ///  @param[in]		filter			The polygon filter to apply to the query.
+        ///  @param[in]		frand			Function returning a random number [0..1).
+        ///  @param[out]	randomRef		The reference id of the random location.
+        ///  @param[out]	randomPt		The random location. [(x, y, z)]
+        /// @returns The status flags for the query.
+        public DtStatus FindRandomPointAroundCircle(long startRef, RcVec3f centerPos, float maxRadius,
+            IDtQueryFilter filter, IRcRand frand, out long randomRef, out RcVec3f randomPt)
         {
             return FindRandomPointAroundCircle(startRef, centerPos, maxRadius, filter, frand, DtNoOpDtPolygonByCircleConstraint.Shared, out randomRef, out randomPt);
         }
@@ -192,15 +189,27 @@ namespace DotRecast.Detour
      *            Function returning a random number [0..1).
      * @return Random location
      */
-        public DtStatus FindRandomPointWithinCircle(long startRef, Vector3 centerPos, float maxRadius,
-            IDtQueryFilter filter, IRcRand frand, out long randomRef, out Vector3 randomPt)
+        public DtStatus FindRandomPointWithinCircle(long startRef, RcVec3f centerPos, float maxRadius,
+            IDtQueryFilter filter, IRcRand frand, out long randomRef, out RcVec3f randomPt)
         {
             return FindRandomPointAroundCircle(startRef, centerPos, maxRadius, filter, frand, DtStrictDtPolygonByCircleConstraint.Shared, out randomRef, out randomPt);
         }
 
-        public DtStatus FindRandomPointAroundCircle(long startRef, Vector3 centerPos, float maxRadius,
+        /// Returns random location on navmesh within the reach of specified location.
+        /// Polygons are chosen weighted by area. The search runs in linear related to number of polygon.
+        /// The location is not exactly constrained by the circle, but it limits the visited polygons.
+        ///  @param[in]		startRef		The reference id of the polygon where the search starts.
+        ///  @param[in]		centerPos		The center of the search circle. [(x, y, z)]
+        ///  @param[in]		maxRadius		The radius of the search circle. [Units: wu]
+        ///  @param[in]		filter			The polygon filter to apply to the query.
+        ///  @param[in]		frand			Function returning a random number [0..1).
+        ///  @param[in]		constraint      
+        ///  @param[out]	randomRef		The reference id of the random location.
+        ///  @param[out]	randomPt		The random location. [(x, y, z)]
+        /// @returns The status flags for the query.
+        public DtStatus FindRandomPointAroundCircle(long startRef, RcVec3f centerPos, float maxRadius,
             IDtQueryFilter filter, IRcRand frand, IDtPolygonByCircleConstraint constraint,
-            out long randomRef, out Vector3 randomPt)
+            out long randomRef, out RcVec3f randomPt)
         {
             randomRef = startRef;
             randomPt = centerPos;
@@ -340,10 +349,10 @@ namespace DotRecast.Detour
                     // Cost
                     if (neighbourNode.flags == 0)
                     {
-                        neighbourNode.pos = Vector3.Lerp(va, vb, 0.5f);
+                        neighbourNode.pos = RcVec3f.Lerp(va, vb, 0.5f);
                     }
 
-                    float total = bestNode.total + Vector3.Distance(bestNode.pos, neighbourNode.pos);
+                    float total = bestNode.total + RcVec3f.Distance(bestNode.pos, neighbourNode.pos);
 
                     // The node is already in open list and the new result is worse, skip.
                     if ((neighbourNode.flags & DtNodeFlags.DT_NODE_OPEN) != 0 && total >= neighbourNode.total)
@@ -378,7 +387,7 @@ namespace DotRecast.Detour
             float t = frand.Next();
 
             float[] areas = new float[randomPolyVerts.Length / 3];
-            Vector3 pt = DtUtils.RandomPointInConvexPoly(randomPolyVerts, randomPolyVerts.Length / 3, areas, s, t);
+            RcVec3f pt = DtUtils.RandomPointInConvexPoly(randomPolyVerts, randomPolyVerts.Length / 3, areas, s, t);
             ClosestPointOnPoly(randomPolyRef, pt, out var closest, out var _);
 
             randomRef = randomPolyRef;
@@ -394,15 +403,15 @@ namespace DotRecast.Detour
         ///
         /// @p pos does not have to be within the bounds of the polygon or navigation mesh.
         ///
-        /// See ClosestPointOnPolyBoundary() for a limited but faster option.
+        /// See closestPointOnPolyBoundary() for a limited but faster option.
         ///
         /// Finds the closest point on the specified polygon.
         ///  @param[in]		ref			The reference id of the polygon.
         ///  @param[in]		pos			The position to check. [(x, y, z)]
-        /// @param[out] closest
-        /// @param[out] posOverPoly
+        ///  @param[out]	closest		The closest point on the polygon. [(x, y, z)]
+        ///  @param[out]	posOverPoly	True of the position is over the polygon.
         /// @returns The status flags for the query.
-        public DtStatus ClosestPointOnPoly(long refs, Vector3 pos, out Vector3 closest, out bool posOverPoly)
+        public DtStatus ClosestPointOnPoly(long refs, RcVec3f pos, out RcVec3f closest, out bool posOverPoly)
         {
             closest = pos;
             posOverPoly = false;
@@ -433,7 +442,7 @@ namespace DotRecast.Detour
         ///  @param[in]		pos			The position to check. [(x, y, z)]
         ///  @param[out]	closest		The closest point. [(x, y, z)]
         /// @returns The status flags for the query.
-        public DtStatus ClosestPointOnPolyBoundary(long refs, Vector3 pos, out Vector3 closest)
+        public DtStatus ClosestPointOnPolyBoundary(long refs, RcVec3f pos, out RcVec3f closest)
         {
             closest = pos;
             var status = m_nav.GetTileAndPolyByRef(refs, out var tile, out var poly);
@@ -493,7 +502,7 @@ namespace DotRecast.Detour
         /// @param[in] pos A position within the xz-bounds of the polygon. [(x, y, z)]
         /// @param[out] height The height at the surface of the polygon.
         /// @returns The status flags for the query.
-        public DtStatus GetPolyHeight(long refs, Vector3 pos, out float height)
+        public DtStatus GetPolyHeight(long refs, RcVec3f pos, out float height)
         {
             height = default;
 
@@ -514,9 +523,9 @@ namespace DotRecast.Detour
             if (poly.GetPolyType() == DtPolyTypes.DT_POLYTYPE_OFFMESH_CONNECTION)
             {
                 int i = poly.verts[0] * 3;
-                var v0 = new Vector3 { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
+                var v0 = new RcVec3f { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
                 i = poly.verts[1] * 3;
-                var v1 = new Vector3 { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
+                var v1 = new RcVec3f { X = tile.data.verts[i], Y = tile.data.verts[i + 1], Z = tile.data.verts[i + 2] };
                 DtUtils.DistancePtSegSqr2D(pos, v0, v1, out var t);
                 height = v0.Y + (v1.Y - v0.Y) * t;
 
@@ -542,8 +551,8 @@ namespace DotRecast.Detour
         ///  @param[out]	nearestPt	The nearest point on the polygon. Unchanged if no polygon is found. [opt] [(x, y, z)]
         ///  @param[out]	isOverPoly 	Set to true if the point's X/Z coordinate lies inside the polygon, false otherwise. Unchanged if no polygon is found. [opt]
         /// @returns The status flags for the query.
-        public DtStatus FindNearestPoly(Vector3 center, Vector3 halfExtents, IDtQueryFilter filter,
-            out long nearestRef, out Vector3 nearestPt, out bool isOverPoly)
+        public DtStatus FindNearestPoly(RcVec3f center, RcVec3f halfExtents, IDtQueryFilter filter,
+            out long nearestRef, out RcVec3f nearestPt, out bool isOverPoly)
         {
             nearestRef = 0;
             nearestPt = center;
@@ -565,7 +574,7 @@ namespace DotRecast.Detour
         }
 
         // FIXME: (PP) duplicate?
-        protected void QueryPolygonsInTile(DtMeshTile tile, Vector3 qmin, Vector3 qmax, IDtQueryFilter filter, IDtPolyQuery query)
+        protected void QueryPolygonsInTile(DtMeshTile tile, RcVec3f qmin, RcVec3f qmax, IDtQueryFilter filter, IDtPolyQuery query)
         {
             if (tile.data.bvTree != null)
             {
@@ -622,8 +631,8 @@ namespace DotRecast.Detour
             }
             else
             {
-                Vector3 bmin = new Vector3();
-                Vector3 bmax = new Vector3();
+                RcVec3f bmin = new RcVec3f();
+                RcVec3f bmax = new RcVec3f();
                 long @base = m_nav.GetPolyRefBase(tile);
                 for (int i = 0; i < tile.data.header.polyCount; ++i)
                 {
@@ -672,7 +681,7 @@ namespace DotRecast.Detour
      *            The polygon filter to apply to the query.
      * @return The reference ids of the polygons that overlap the query box.
      */
-        public DtStatus QueryPolygons(Vector3 center, Vector3 halfExtents, IDtQueryFilter filter, IDtPolyQuery query)
+        public DtStatus QueryPolygons(RcVec3f center, RcVec3f halfExtents, IDtQueryFilter filter, IDtPolyQuery query)
         {
             if (!center.IsFinite() || !halfExtents.IsFinite() || null == filter)
             {
@@ -680,8 +689,8 @@ namespace DotRecast.Detour
             }
 
             // Find tiles the query touches.
-            Vector3 bmin = Vector3.Subtract(center, halfExtents);
-            Vector3 bmax = Vector3.Add(center, halfExtents);
+            RcVec3f bmin = RcVec3f.Subtract(center, halfExtents);
+            RcVec3f bmax = RcVec3f.Add(center, halfExtents);
             foreach (var t in QueryTiles(center, halfExtents))
             {
                 QueryPolygonsInTile(t, bmin, bmax, filter, query);
@@ -693,15 +702,15 @@ namespace DotRecast.Detour
         /**
      * Finds tiles that overlap the search box.
      */
-        public IList<DtMeshTile> QueryTiles(Vector3 center, Vector3 halfExtents)
+        public IList<DtMeshTile> QueryTiles(RcVec3f center, RcVec3f halfExtents)
         {
             if (!center.IsFinite() || !halfExtents.IsFinite())
             {
                 return RcImmutableArray<DtMeshTile>.Empty;
             }
 
-            Vector3 bmin = Vector3.Subtract(center, halfExtents);
-            Vector3 bmax = Vector3.Add(center, halfExtents);
+            RcVec3f bmin = RcVec3f.Subtract(center, halfExtents);
+            RcVec3f bmax = RcVec3f.Add(center, halfExtents);
             m_nav.CalcTileLoc(bmin, out var minx, out var miny);
             m_nav.CalcTileLoc(bmax, out var maxx, out var maxy);
 
@@ -717,27 +726,30 @@ namespace DotRecast.Detour
             return tiles;
         }
 
-        /**
-     * Finds a path from the start polygon to the end polygon.
-     *
-     * If the end polygon cannot be reached through the navigation graph, the last polygon in the path will be the
-     * nearest the end polygon.
-     *
-     * The start and end positions are used to calculate traversal costs. (The y-values impact the result.)
-     *
-     * @param startRef
-     *            The reference id of the start polygon.
-     * @param endRef
-     *            The reference id of the end polygon.
-     * @param startPos
-     *            A position within the start polygon. [(x, y, z)]
-     * @param endPos
-     *            A position within the end polygon. [(x, y, z)]
-     * @param filter
-     *            The polygon filter to apply to the query.
-     * @return Found path
-     */
-        public DtStatus FindPath(long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter, ref List<long> path, DtFindPathOption fpo)
+        /// @par
+        ///
+        /// If the end polygon cannot be reached through the navigation graph,
+        /// the last polygon in the path will be the nearest the end polygon.
+        ///
+        /// If the path array is to small to hold the full result, it will be filled as 
+        /// far as possible from the start polygon toward the end polygon.
+        ///
+        /// The start and end positions are used to calculate traversal costs. 
+        /// (The y-values impact the result.)
+        ///
+        /// @name Standard Pathfinding Functions
+        /// @{
+        /// Finds a path from the start polygon to the end polygon.
+        ///  @param[in]		startRef	The reference id of the start polygon.
+        ///  @param[in]		endRef		The reference id of the end polygon.
+        ///  @param[in]		startPos	A position within the start polygon. [(x, y, z)]
+        ///  @param[in]		endPos		A position within the end polygon. [(x, y, z)]
+        ///  @param[in]		filter		The polygon filter to apply to the query.
+        ///  @param[out]	path		An ordered list of polygon references representing the path. (Start to end.) 
+        ///  							[(polyRef) * @p pathCount]
+        ///  @param[out]	pathCount	The number of polygons returned in the @p path array.
+        ///  @param[in]		maxPath		The maximum number of polygons the @p path array can hold. [Limit: >= 1]
+        public DtStatus FindPath(long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter, ref List<long> path, DtFindPathOption fpo)
         {
             if (null == path)
                 return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
@@ -787,7 +799,8 @@ namespace DotRecast.Detour
             DtNode lastBestNode = startNode;
             float lastBestNodeCost = startNode.total;
 
-
+            DtRaycastHit rayHit = new DtRaycastHit();
+            rayHit.path = new List<long>();
             while (!m_openList.IsEmpty())
             {
                 // Remove node from open list and put it in closed list.
@@ -832,7 +845,7 @@ namespace DotRecast.Detour
                 if ((options & DtFindPathOptions.DT_FINDPATH_ANY_ANGLE) != 0)
                 {
                     if ((parentRef != 0) &&
-                        (raycastLimitSqr >= float.MaxValue || Vector3.DistanceSquared(parentNode.pos, bestNode.pos) < raycastLimitSqr))
+                        (raycastLimitSqr >= float.MaxValue || RcVec3f.DistanceSquared(parentNode.pos, bestNode.pos) < raycastLimitSqr))
                     {
                         tryLOS = true;
                     }
@@ -887,13 +900,13 @@ namespace DotRecast.Detour
                     if (tryLOS)
                     {
                         var rayStatus = Raycast(parentRef, parentNode.pos, neighbourPos, filter,
-                            DtRaycastOptions.DT_RAYCAST_USE_COSTS, grandpaRef, out var rayHit);
+                            DtRaycastOptions.DT_RAYCAST_USE_COSTS, ref rayHit, grandpaRef);
                         if (rayStatus.Succeeded())
                         {
                             foundShortCut = rayHit.t >= 1.0f;
                             if (foundShortCut)
                             {
-                                shortcut = rayHit.path;
+                                shortcut = new List<long>(rayHit.path);
                                 // shortcut found using raycast. Using shorter cost
                                 // instead
                                 cost = parentNode.cost + rayHit.pathCost;
@@ -996,17 +1009,17 @@ namespace DotRecast.Detour
      *            query options (see: #FindPathOptions)
      * @return
      */
-        public DtStatus InitSlicedFindPath(long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter, int options)
+        public DtStatus InitSlicedFindPath(long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter, int options)
         {
             return InitSlicedFindPath(startRef, endRef, startPos, endPos, filter, options, DtDefaultQueryHeuristic.Default, -1.0f);
         }
 
-        public DtStatus InitSlicedFindPath(long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter, int options, float raycastLimit)
+        public DtStatus InitSlicedFindPath(long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter, int options, float raycastLimit)
         {
             return InitSlicedFindPath(startRef, endRef, startPos, endPos, filter, options, DtDefaultQueryHeuristic.Default, raycastLimit);
         }
 
-        public DtStatus InitSlicedFindPath(long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter, int options, IDtQueryHeuristic heuristic, float raycastLimit)
+        public DtStatus InitSlicedFindPath(long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter, int options, IDtQueryHeuristic heuristic, float raycastLimit)
         {
             // Init path state.
             m_query = new DtQueryData();
@@ -1083,6 +1096,9 @@ namespace DotRecast.Detour
                 return DtStatus.DT_FAILURE;
             }
 
+            var rayHit = new DtRaycastHit();
+            rayHit.path = new List<long>();
+
             int iter = 0;
             while (iter < maxIter && !m_openList.IsEmpty())
             {
@@ -1150,7 +1166,7 @@ namespace DotRecast.Detour
                 if ((m_query.options & DtFindPathOptions.DT_FINDPATH_ANY_ANGLE) != 0)
                 {
                     if ((parentRef != 0) &&
-                        (m_query.raycastLimitSqr >= float.MaxValue || Vector3.DistanceSquared(parentNode.pos, bestNode.pos) < m_query.raycastLimitSqr))
+                        (m_query.raycastLimitSqr >= float.MaxValue || RcVec3f.DistanceSquared(parentNode.pos, bestNode.pos) < m_query.raycastLimitSqr))
                     {
                         tryLOS = true;
                     }
@@ -1208,13 +1224,13 @@ namespace DotRecast.Detour
                     if (tryLOS)
                     {
                         status = Raycast(parentRef, parentNode.pos, neighbourPos, m_query.filter,
-                            DtRaycastOptions.DT_RAYCAST_USE_COSTS, grandpaRef, out var rayHit);
+                            DtRaycastOptions.DT_RAYCAST_USE_COSTS, ref rayHit, grandpaRef);
                         if (status.Succeeded())
                         {
                             foundShortCut = rayHit.t >= 1.0f;
                             if (foundShortCut)
                             {
-                                shortcut = rayHit.path;
+                                shortcut = new List<long>(rayHit.path);
                                 // shortcut found using raycast. Using shorter cost
                                 // instead
                                 cost = parentNode.cost + rayHit.pathCost;
@@ -1406,7 +1422,7 @@ namespace DotRecast.Detour
             return DtStatus.DT_SUCCESS | details;
         }
 
-        protected DtStatus AppendVertex(Vector3 pos, int flags, long refs, ref List<DtStraightPath> straightPath,
+        protected DtStatus AppendVertex(RcVec3f pos, int flags, long refs, ref List<DtStraightPath> straightPath,
             int maxStraightPath)
         {
             if (straightPath.Count > 0 && DtUtils.VEqual(straightPath[straightPath.Count - 1].pos, pos))
@@ -1432,7 +1448,7 @@ namespace DotRecast.Detour
             return DtStatus.DT_IN_PROGRESS;
         }
 
-        protected DtStatus AppendPortals(int startIdx, int endIdx, Vector3 endPos, List<long> path,
+        protected DtStatus AppendPortals(int startIdx, int endIdx, RcVec3f endPos, List<long> path,
             ref List<DtStraightPath> straightPath, int maxStraightPath, int options)
         {
             var startPos = straightPath[straightPath.Count - 1].pos;
@@ -1473,7 +1489,7 @@ namespace DotRecast.Detour
                 // Append intersection
                 if (DtUtils.IntersectSegSeg2D(startPos, endPos, left, right, out var _, out var t))
                 {
-                    var pt = Vector3.Lerp(left, right, t);
+                    var pt = RcVec3f.Lerp(left, right, t);
                     stat = AppendVertex(pt, 0, path[i + 1], ref straightPath, maxStraightPath);
                     if (!stat.InProgress())
                     {
@@ -1511,7 +1527,7 @@ namespace DotRecast.Detour
         ///  @param[in]		maxStraightPath		The maximum number of points the straight path arrays can hold.  [Limit: > 0]
         ///  @param[in]		options				Query options. (see: #dtStraightPathOptions)
         /// @returns The status flags for the query.
-        public virtual DtStatus FindStraightPath(Vector3 startPos, Vector3 endPos, List<long> path,
+        public virtual DtStatus FindStraightPath(RcVec3f startPos, RcVec3f endPos, List<long> path,
             ref List<DtStraightPath> straightPath,
             int maxStraightPath, int options)
         {
@@ -1545,9 +1561,9 @@ namespace DotRecast.Detour
 
             if (path.Count > 1)
             {
-                Vector3 portalApex = closestStartPos;
-                Vector3 portalLeft = portalApex;
-                Vector3 portalRight = portalApex;
+                RcVec3f portalApex = closestStartPos;
+                RcVec3f portalLeft = portalApex;
+                RcVec3f portalRight = portalApex;
                 int apexIndex = 0;
                 int leftIndex = 0;
                 int rightIndex = 0;
@@ -1560,8 +1576,8 @@ namespace DotRecast.Detour
 
                 for (int i = 0; i < path.Count; ++i)
                 {
-                    Vector3 left;
-                    Vector3 right;
+                    RcVec3f left;
+                    RcVec3f right;
                     int toType;
 
                     if (i + 1 < path.Count)
@@ -1770,11 +1786,11 @@ namespace DotRecast.Detour
         ///  @param[out]	visitedCount	The number of polygons visited during the move.
         ///  @param[in]		maxVisitedSize	The maximum number of polygons the @p visited array can hold.
         /// @returns The status flags for the query.
-        public DtStatus MoveAlongSurface(long startRef, Vector3 startPos, Vector3 endPos,
+        public DtStatus MoveAlongSurface(long startRef, RcVec3f startPos, RcVec3f endPos,
             IDtQueryFilter filter,
-            out Vector3 resultPos, ref List<long> visited)
+            out RcVec3f resultPos, ref List<long> visited)
         {
-            resultPos = Vector3.Zero;
+            resultPos = RcVec3f.Zero;
 
             if (null != visited)
                 visited.Clear();
@@ -1786,9 +1802,9 @@ namespace DotRecast.Detour
                 return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
             }
 
-            DtNodePool tinyNodePool = new DtNodePool();
+            m_tinyNodePool.Clear();
 
-            DtNode startNode = tinyNodePool.GetNode(startRef);
+            DtNode startNode = m_tinyNodePool.GetNode(startRef);
             startNode.pidx = 0;
             startNode.cost = 0;
             startNode.total = 0;
@@ -1797,14 +1813,14 @@ namespace DotRecast.Detour
             LinkedList<DtNode> stack = new LinkedList<DtNode>();
             stack.AddLast(startNode);
 
-            Vector3 bestPos = new Vector3();
+            RcVec3f bestPos = new RcVec3f();
             float bestDist = float.MaxValue;
             DtNode bestNode = null;
             bestPos = startPos;
 
             // Search constraints
-            var searchPos = Vector3.Lerp(startPos, endPos, 0.5f);
-            float searchRadSqr = RcMath.Sqr(Vector3.Distance(startPos, endPos) / 2.0f + 0.001f);
+            var searchPos = RcVec3f.Lerp(startPos, endPos, 0.5f);
+            float searchRadSqr = RcMath.Sqr(RcVec3f.Distance(startPos, endPos) / 2.0f + 0.001f);
 
             float[] verts = new float[m_nav.GetMaxVertsPerPoly() * 3];
 
@@ -1893,7 +1909,7 @@ namespace DotRecast.Detour
                     {
                         for (int k = 0; k < nneis; ++k)
                         {
-                            DtNode neighbourNode = tinyNodePool.GetNode(neis[k]);
+                            DtNode neighbourNode = m_tinyNodePool.GetNode(neis[k]);
                             // Skip if already visited.
                             if ((neighbourNode.flags & DtNodeFlags.DT_NODE_CLOSED) != 0)
                             {
@@ -1911,7 +1927,7 @@ namespace DotRecast.Detour
                             }
 
                             // Mark as the node as visited and push to queue.
-                            neighbourNode.pidx = tinyNodePool.GetNodeIdx(curNode);
+                            neighbourNode.pidx = m_tinyNodePool.GetNodeIdx(curNode);
                             neighbourNode.flags |= DtNodeFlags.DT_NODE_CLOSED;
                             stack.AddLast(neighbourNode);
                         }
@@ -1926,8 +1942,8 @@ namespace DotRecast.Detour
                 DtNode node = bestNode;
                 do
                 {
-                    DtNode next = tinyNodePool.GetNodeAtIdx(node.pidx);
-                    node.pidx = tinyNodePool.GetNodeIdx(prev);
+                    DtNode next = m_tinyNodePool.GetNodeAtIdx(node.pidx);
+                    node.pidx = m_tinyNodePool.GetNodeIdx(prev);
                     prev = node;
                     node = next;
                 } while (node != null);
@@ -1937,7 +1953,7 @@ namespace DotRecast.Detour
                 do
                 {
                     visited.Add(node.id);
-                    node = tinyNodePool.GetNodeAtIdx(node.pidx);
+                    node = m_tinyNodePool.GetNodeAtIdx(node.pidx);
                 } while (node != null);
             }
 
@@ -1946,10 +1962,10 @@ namespace DotRecast.Detour
             return DtStatus.DT_SUCCESS;
         }
 
-        protected DtStatus GetPortalPoints(long from, long to, out Vector3 left, out Vector3 right, out int fromType, out int toType)
+        protected DtStatus GetPortalPoints(long from, long to, out RcVec3f left, out RcVec3f right, out int fromType, out int toType)
         {
-            left = Vector3.Zero;
-            right = Vector3.Zero;
+            left = RcVec3f.Zero;
+            right = RcVec3f.Zero;
             fromType = 0;
             toType = 0;
 
@@ -1975,10 +1991,10 @@ namespace DotRecast.Detour
         // Returns portal points between two polygons.
         protected DtStatus GetPortalPoints(long from, DtPoly fromPoly, DtMeshTile fromTile,
             long to, DtPoly toPoly, DtMeshTile toTile,
-            out Vector3 left, out Vector3 right)
+            out RcVec3f left, out RcVec3f right)
         {
-            left = Vector3.Zero;
-            right = Vector3.Zero;
+            left = RcVec3f.Zero;
+            right = RcVec3f.Zero;
 
             // Find the link that points to the 'to' polygon.
             DtLink link = null;
@@ -2072,7 +2088,7 @@ namespace DotRecast.Detour
         }
 
         protected DtStatus GetEdgeMidPoint(long from, DtPoly fromPoly, DtMeshTile fromTile, long to,
-            DtPoly toPoly, DtMeshTile toTile, ref Vector3 mid)
+            DtPoly toPoly, DtMeshTile toTile, ref RcVec3f mid)
         {
             var ppStatus = GetPortalPoints(from, fromPoly, fromTile, to, toPoly, toTile, out var left, out var right);
             if (ppStatus.Failed())
@@ -2087,9 +2103,9 @@ namespace DotRecast.Detour
             return DtStatus.DT_SUCCESS;
         }
 
-        protected DtStatus GetEdgeIntersectionPoint(Vector3 fromPos, long from, DtPoly fromPoly, DtMeshTile fromTile,
-            Vector3 toPos, long to, DtPoly toPoly, DtMeshTile toTile,
-            ref Vector3 pt)
+        protected DtStatus GetEdgeIntersectionPoint(RcVec3f fromPos, long from, DtPoly fromPoly, DtMeshTile fromTile,
+            RcVec3f toPos, long to, DtPoly toPoly, DtMeshTile toTile,
+            ref RcVec3f pt)
         {
             var ppStatus = GetPortalPoints(from, fromPoly, fromTile, to, toPoly, toTile, out var left, out var right);
             if (ppStatus.Failed())
@@ -2103,10 +2119,63 @@ namespace DotRecast.Detour
                 t = Math.Clamp(t2, 0.1f, 0.9f);
             }
 
-            pt = Vector3.Lerp(left, right, t);
+            pt = RcVec3f.Lerp(left, right, t);
             return DtStatus.DT_SUCCESS;
         }
 
+        /// @par
+        ///
+        /// This method is meant to be used for quick, short distance checks.
+        ///
+        /// If the path array is too small to hold the result, it will be filled as 
+        /// far as possible from the start postion toward the end position.
+        ///
+        /// <b>Using the Hit Parameter (t)</b>
+        /// 
+        /// If the hit parameter is a very high value (FLT_MAX), then the ray has hit 
+        /// the end position. In this case the path represents a valid corridor to the 
+        /// end position and the value of @p hitNormal is undefined.
+        ///
+        /// If the hit parameter is zero, then the start position is on the wall that 
+        /// was hit and the value of @p hitNormal is undefined.
+        ///
+        /// If 0 < t < 1.0 then the following applies:
+        ///
+        /// @code
+        /// distanceToHitBorder = distanceToEndPosition * t
+        /// hitPoint = startPos + (endPos - startPos) * t
+        /// @endcode
+        ///
+        /// <b>Use Case Restriction</b>
+        ///
+        /// The raycast ignores the y-value of the end position. (2D check.) This 
+        /// places significant limits on how it can be used. For example:
+        ///
+        /// Consider a scene where there is a main floor with a second floor balcony 
+        /// that hangs over the main floor. So the first floor mesh extends below the 
+        /// balcony mesh. The start position is somewhere on the first floor. The end 
+        /// position is on the balcony.
+        ///
+        /// The raycast will search toward the end position along the first floor mesh. 
+        /// If it reaches the end position's xz-coordinates it will indicate FLT_MAX
+        /// (no wall hit), meaning it reached the end position. This is one example of why
+        /// this method is meant for short distance checks.
+        ///
+        public DtStatus Raycast(long startRef, RcVec3f startPos, RcVec3f endPos,
+            IDtQueryFilter filter,
+            out float t, out RcVec3f hitNormal, ref List<long> path)
+        {
+            DtRaycastHit hit = new DtRaycastHit();
+            hit.path = path;
+
+            DtStatus status = Raycast(startRef, startPos, endPos, filter, 0, ref hit, 0);
+
+            t = hit.t;
+            hitNormal = hit.hitNormal;
+            path = hit.path;
+
+            return status;
+        }
 
         /// @par
         ///
@@ -2160,11 +2229,10 @@ namespace DotRecast.Detour
         /// @param[out] pathCount The number of visited polygons. [opt]
         /// @param[in] maxPath The maximum number of polygons the @p path array can hold.
         /// @returns The status flags for the query.
-        public DtStatus Raycast(long startRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter, int options,
-            long prevRef, out DtRaycastHit hit)
+        public DtStatus Raycast(long startRef, RcVec3f startPos, RcVec3f endPos,
+            IDtQueryFilter filter, int options,
+            ref DtRaycastHit hit, long prevRef)
         {
-            hit = null;
-
             // Validate input
             if (!m_nav.IsValidPolyRef(startRef) || !startPos.IsFinite() || !endPos.IsFinite()
                 || null == filter || (prevRef != 0 && !m_nav.IsValidPolyRef(prevRef)))
@@ -2172,15 +2240,18 @@ namespace DotRecast.Detour
                 return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
             }
 
-            hit = new DtRaycastHit();
+            hit.t = 0;
+            hit.path.Clear();
+            hit.pathCost = 0;
 
-            Vector3[] verts = new Vector3[m_nav.GetMaxVertsPerPoly() + 1];
+            RcVec3f[] verts = new RcVec3f[m_nav.GetMaxVertsPerPoly() + 1];
 
-            Vector3 curPos = Vector3.Zero;
-            Vector3 lastPos = Vector3.Zero;
+            RcVec3f curPos = RcVec3f.Zero;
+            RcVec3f lastPos = RcVec3f.Zero;
 
             curPos = startPos;
-            var dir = Vector3.Subtract(endPos, startPos);
+            RcVec3f dir = RcVec3f.Subtract(endPos, startPos);
+            hit.hitNormal = RcVec3f.Zero;
 
             DtMeshTile prevTile, tile, nextTile;
             DtPoly prevPoly, poly, nextPoly;
@@ -2344,8 +2415,8 @@ namespace DotRecast.Detour
                     curPos = RcVecUtils.Mad(startPos, dir, hit.t);
                     var e1 = verts[segMax];
                     var e2 = verts[(segMax + 1) % nv];
-                    var eDir = Vector3.Subtract(e2, e1);
-                    var diff = Vector3.Subtract(curPos, e1);
+                    var eDir = RcVec3f.Subtract(e2, e1);
+                    var diff = RcVec3f.Subtract(curPos, e1);
                     float s = RcMath.Sqr(eDir.X) > RcMath.Sqr(eDir.Z) ? diff.X / eDir.X : diff.Z / eDir.Z;
                     curPos.Y = e1.Y + eDir.Y * s;
 
@@ -2364,7 +2435,7 @@ namespace DotRecast.Detour
                     // int vb = b * 3;
                     float dx = verts[b].X - verts[a].X;
                     float dz = verts[b].Z - verts[a].X;
-                    hit.hitNormal = Vector3.Normalize(new Vector3(dz, 0, -dx));
+                    hit.hitNormal = RcVec3f.Normalize(new RcVec3f(dz, 0, -dx));
                     return DtStatus.DT_SUCCESS;
                 }
 
@@ -2424,7 +2495,7 @@ namespace DotRecast.Detour
         ///  @param[out]	resultCount		The number of polygons found. [opt]
         ///  @param[in]		maxResult		The maximum number of polygons the result arrays can hold.
         /// @returns The status flags for the query.
-        public DtStatus FindPolysAroundCircle(long startRef, Vector3 centerPos, float radius, IDtQueryFilter filter,
+        public DtStatus FindPolysAroundCircle(long startRef, RcVec3f centerPos, float radius, IDtQueryFilter filter,
             ref List<long> resultRef, ref List<long> resultParent, ref List<float> resultCost)
         {
             if (null != resultRef)
@@ -2528,7 +2599,7 @@ namespace DotRecast.Detour
                     // Cost
                     if (neighbourNode.flags == 0)
                     {
-                        neighbourNode.pos = Vector3.Lerp(va, vb, 0.5f);
+                        neighbourNode.pos = RcVec3f.Lerp(va, vb, 0.5f);
                     }
 
                     float cost = filter.GetCost(bestNode.pos, neighbourNode.pos, parentRef, parentTile, parentPoly, bestRef,
@@ -2595,7 +2666,7 @@ namespace DotRecast.Detour
         ///  @param[out]	resultCount		The number of polygons found.
         ///  @param[in]		maxResult		The maximum number of polygons the result arrays can hold.
         /// @returns The status flags for the query.
-        public DtStatus FindPolysAroundShape(long startRef, Vector3[] verts, IDtQueryFilter filter,
+        public DtStatus FindPolysAroundShape(long startRef, RcVec3f[] verts, IDtQueryFilter filter,
             ref List<long> resultRef, ref List<long> resultParent, ref List<float> resultCost)
         {
             resultRef.Clear();
@@ -2612,7 +2683,7 @@ namespace DotRecast.Detour
             m_nodePool.Clear();
             m_openList.Clear();
 
-            Vector3 centerPos = Vector3.Zero;
+            RcVec3f centerPos = RcVec3f.Zero;
             for (int i = 0; i < nverts; ++i)
             {
                 centerPos += verts[i];
@@ -2710,7 +2781,7 @@ namespace DotRecast.Detour
                     // Cost
                     if (neighbourNode.flags == 0)
                     {
-                        neighbourNode.pos = Vector3.Lerp(va, vb, 0.5f);
+                        neighbourNode.pos = RcVec3f.Lerp(va, vb, 0.5f);
                     }
 
                     float cost = filter.GetCost(bestNode.pos, neighbourNode.pos, parentRef, parentTile, parentPoly, bestRef,
@@ -2773,7 +2844,7 @@ namespace DotRecast.Detour
         ///  @param[out]	resultRef		The reference ids of the polygons touched by the circle.
         ///  @param[out]	resultParent	The reference ids of the parent polygons for each result. 
         /// @returns The status flags for the query.
-        public DtStatus FindLocalNeighbourhood(long startRef, Vector3 centerPos, float radius,
+        public DtStatus FindLocalNeighbourhood(long startRef, RcVec3f centerPos, float radius,
             IDtQueryFilter filter,
             ref List<long> resultRef, ref List<long> resultParent)
         {
@@ -2788,9 +2859,9 @@ namespace DotRecast.Detour
             resultRef.Clear();
             resultParent.Clear();
 
-            DtNodePool tinyNodePool = new DtNodePool();
+            m_tinyNodePool.Clear();
 
-            DtNode startNode = tinyNodePool.GetNode(startRef);
+            DtNode startNode = m_tinyNodePool.GetNode(startRef);
             startNode.pidx = 0;
             startNode.id = startRef;
             startNode.flags = DtNodeFlags.DT_NODE_CLOSED;
@@ -2826,7 +2897,7 @@ namespace DotRecast.Detour
                         continue;
                     }
 
-                    DtNode neighbourNode = tinyNodePool.GetNode(neighbourRef);
+                    DtNode neighbourNode = m_tinyNodePool.GetNode(neighbourRef);
                     // Skip visited.
                     if ((neighbourNode.flags & DtNodeFlags.DT_NODE_CLOSED) != 0)
                     {
@@ -2866,7 +2937,7 @@ namespace DotRecast.Detour
                     // Mark node visited, this is done before the overlap test so that
                     // we will not visit the poly again if the test fails.
                     neighbourNode.flags |= DtNodeFlags.DT_NODE_CLOSED;
-                    neighbourNode.pidx = tinyNodePool.GetNodeIdx(curNode);
+                    neighbourNode.pidx = m_tinyNodePool.GetNodeIdx(curNode);
 
                     // Check that the polygon does not collide with existing polygons.
 
@@ -3101,13 +3172,13 @@ namespace DotRecast.Detour
         ///  @param[out]	hitNormal		The normalized ray formed from the wall point to the 
         ///  								source point. [(x, y, z)]
         /// @returns The status flags for the query.
-        public virtual DtStatus FindDistanceToWall(long startRef, Vector3 centerPos, float maxRadius,
+        public virtual DtStatus FindDistanceToWall(long startRef, RcVec3f centerPos, float maxRadius,
             IDtQueryFilter filter,
-            out float hitDist, out Vector3 hitPos, out Vector3 hitNormal)
+            out float hitDist, out RcVec3f hitPos, out RcVec3f hitNormal)
         {
             hitDist = 0;
-            hitPos = Vector3.Zero;
-            hitNormal = Vector3.Zero;
+            hitPos = RcVec3f.Zero;
+            hitNormal = RcVec3f.Zero;
 
             // Validate input
             if (!m_nav.IsValidPolyRef(startRef) || !centerPos.IsFinite() || maxRadius < 0
@@ -3131,8 +3202,8 @@ namespace DotRecast.Detour
             float radiusSqr = RcMath.Sqr(maxRadius);
 
             var hasBestV = false;
-            var bestvj = Vector3.Zero;
-            var bestvi = Vector3.Zero;
+            var bestvj = RcVec3f.Zero;
+            var bestvi = RcVec3f.Zero;
 
             var status = DtStatus.DT_SUCCESS;
             while (!m_openList.IsEmpty())
@@ -3271,7 +3342,7 @@ namespace DotRecast.Detour
                             ref neighbourNode.pos);
                     }
 
-                    float total = bestNode.total + Vector3.Distance(bestNode.pos, neighbourNode.pos);
+                    float total = bestNode.total + RcVec3f.Distance(bestNode.pos, neighbourNode.pos);
 
                     // The node is already in open list and the new result is worse, skip.
                     if ((neighbourNode.flags & DtNodeFlags.DT_NODE_OPEN) != 0 && total >= neighbourNode.total)
@@ -3299,8 +3370,8 @@ namespace DotRecast.Detour
             // Calc hit normal.
             if (hasBestV)
             {
-                var tangent = Vector3.Subtract(bestvi, bestvj);
-                hitNormal = Vector3.Normalize(new Vector3(tangent.Z, 0, -tangent.X));
+                var tangent = RcVec3f.Subtract(bestvi, bestvj);
+                hitNormal = RcVec3f.Normalize(new RcVec3f(tangent.Z, 0, -tangent.X));
             }
 
             hitDist = MathF.Sqrt(radiusSqr);
@@ -3335,15 +3406,18 @@ namespace DotRecast.Detour
             return m_nav;
         }
 
-        /**
-     * Gets a path from the explored nodes in the previous search.
-     *
-     * @param endRef
-     *            The reference id of the end polygon.
-     * @returns An ordered list of polygon references representing the path. (Start to end.)
-     * @remarks The result of this function depends on the state of the query object. For that reason it should only be
-     *          used immediately after one of the two Dijkstra searches, findPolysAroundCircle or findPolysAroundShape.
-     */
+        /// Gets a path from the explored nodes in the previous search.
+        ///  @param[in]		endRef		The reference id of the end polygon.
+        ///  @param[out]	path		An ordered list of polygon references representing the path. (Start to end.)
+        ///  							[(polyRef) * @p pathCount]
+        ///  @param[out]	pathCount	The number of polygons returned in the @p path array.
+        ///  @param[in]		maxPath		The maximum number of polygons the @p path array can hold. [Limit: >= 0]
+        ///  @returns		The status flags. Returns DT_FAILURE | DT_INVALID_PARAM if any parameter is wrong, or if
+        ///  				@p endRef was not explored in the previous search. Returns DT_SUCCESS | DT_BUFFER_TOO_SMALL
+        ///  				if @p path cannot contain the entire path. In this case it is filled to capacity with a partial path.
+        ///  				Otherwise returns DT_SUCCESS.
+        ///  @remarks		The result of this function depends on the state of the query object. For that reason it should only
+        ///  				be used immediately after one of the two Dijkstra searches, findPolysAroundCircle or findPolysAroundShape.
         public DtStatus GetPathFromDijkstraSearch(long endRef, ref List<long> path)
         {
             if (!m_nav.IsValidPolyRef(endRef) || null == path)
@@ -3353,17 +3427,13 @@ namespace DotRecast.Detour
 
             path.Clear();
 
-            List<DtNode> nodes = m_nodePool.FindNodes(endRef);
-            if (nodes.Count != 1)
+            if (m_nodePool.FindNodes(endRef, out var endNodes) != 1
+                || (endNodes[0].flags & DtNodeFlags.DT_NODE_CLOSED) == 0)
             {
                 return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
             }
 
-            DtNode endNode = nodes[0];
-            if ((endNode.flags & DtNodeFlags.DT_NODE_CLOSED) == 0)
-            {
-                return DtStatus.DT_FAILURE | DtStatus.DT_INVALID_PARAM;
-            }
+            DtNode endNode = endNodes[0];
 
             return GetPathToNode(endNode, ref path);
         }
@@ -3397,10 +3467,11 @@ namespace DotRecast.Detour
             return DtStatus.DT_SUCCESS;
         }
 
-        /**
-     * The closed list is the list of polygons that were fully evaluated during the last navigation graph search. (A* or
-     * Dijkstra)
-     */
+        /// @par
+        ///
+        /// The closed list is the list of polygons that were fully evaluated during 
+        /// the last navigation graph search. (A* or Dijkstra)
+        /// 
         public bool IsInClosedList(long refs)
         {
             if (m_nodePool == null)
@@ -3408,9 +3479,10 @@ namespace DotRecast.Detour
                 return false;
             }
 
-            foreach (DtNode n in m_nodePool.FindNodes(refs))
+            int n = m_nodePool.FindNodes(refs, out var nodes);
+            for (int i = 0; i < n; ++i)
             {
-                if ((n.flags & DtNodeFlags.DT_NODE_CLOSED) != 0)
+                if ((nodes[i].flags & DtNodeFlags.DT_NODE_CLOSED) != 0)
                 {
                     return true;
                 }

src/DotRecast.Detour/DtNavMeshRaycast.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -28,7 +27,7 @@ namespace DotRecast.Detour
  */
     public static class DtNavMeshRaycast
     {
-        public static bool Raycast(DtNavMesh mesh, Vector3 src, Vector3 dst, out float hitTime)
+        public static bool Raycast(DtNavMesh mesh, RcVec3f src, RcVec3f dst, out float hitTime)
         {
             hitTime = 0.0f;
             for (int t = 0; t < mesh.GetMaxTiles(); ++t)
@@ -46,7 +45,7 @@ namespace DotRecast.Detour
             return false;
         }
 
-        private static bool Raycast(DtMeshTile tile, Vector3 sp, Vector3 sq, out float hitTime)
+        private static bool Raycast(DtMeshTile tile, RcVec3f sp, RcVec3f sq, out float hitTime)
         {
             hitTime = 0.0f;
             for (int i = 0; i < tile.data.header.polyCount; ++i)
@@ -59,7 +58,7 @@ namespace DotRecast.Detour
 
                 ref DtPolyDetail pd = ref tile.data.detailMeshes[i];
 
-                Vector3[] verts = new Vector3[3];
+                RcVec3f[] verts = new RcVec3f[3];
                 for (int j = 0; j < pd.triCount; ++j)
                 {
                     int t = (pd.triBase + j) * 4;

src/DotRecast.Detour/DtNoOpDtPolygonByCircleConstraint.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -11,7 +10,7 @@ namespace DotRecast.Detour
         {
         }
 
-        public float[] Apply(float[] polyVerts, Vector3 circleCenter, float radius)
+        public float[] Apply(float[] polyVerts, RcVec3f circleCenter, float radius)
         {
             return polyVerts;
         }

src/DotRecast.Detour/DtNode.cs

@@ -20,48 +20,39 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
     public class DtNode
     {
-        public readonly int index;
+        public readonly int ptr;
 
-        /** Position of the node. */
-        public Vector3 pos = new Vector3();
+        public RcVec3f pos; // Position of the node.
+        public float cost; // Cost from previous node to current node.
+        public float total; // Cost up to the node.
+        public int pidx; // Index to parent node.
+        public int state; // extra state information. A polyRef can have multiple nodes with different extra info. see DT_MAX_STATES_PER_NODE
+        public int flags; // Node flags. A combination of dtNodeFlags.
+        public long id; // Polygon ref the node corresponds to.
+        public List<long> shortcut; // Shortcut found by raycast.
 
-        /** Cost of reaching the given node. */
-        public float cost;
-
-        /** Total cost of reaching the goal via the given node including heuristics. */
-        public float total;
-
-        /** Index to parent node. */
-        public int pidx;
-
-        /**
-     * extra state information. A polyRef can have multiple nodes with different extra info. see DT_MAX_STATES_PER_NODE
-     */
-        public int state;
-
-        /** Node flags. A combination of dtNodeFlags. */
-        public int flags;
-
-        /** Polygon ref the node corresponds to. */
-        public long id;
-
-        /** Shortcut found by raycast. */
-        public List<long> shortcut;
-
-        public DtNode(int index)
+        public DtNode(int ptr)
         {
-            this.index = index;
+            this.ptr = ptr;
+        }
+        
+        public static int ComparisonNodeTotal(DtNode a, DtNode b)
+        {
+            int compare = a.total.CompareTo(b.total);
+            if (0 != compare)
+                return compare;
+
+            return a.ptr.CompareTo(b.ptr);
         }
 
         public override string ToString()
         {
-            return "Node [id=" + id + "]";
+            return $"Node [ptr={ptr} id={id} cost={cost} total={total}]";
         }
     }
 }

src/DotRecast.Detour/DtNodePool.cs

@@ -19,40 +19,48 @@ freely, subject to the following restrictions:
 */
 
 using System.Collections.Generic;
+using System.Linq;
 
 namespace DotRecast.Detour
 {
     public class DtNodePool
     {
-        private readonly Dictionary<long, List<DtNode>> m_map = new Dictionary<long, List<DtNode>>();
-        private readonly List<DtNode> m_nodes = new List<DtNode>();
+        private readonly Dictionary<long, List<DtNode>> m_map;
+
+        private int m_nodeCount;
+        private readonly List<DtNode> m_nodes;
 
         public DtNodePool()
         {
+            m_map = new Dictionary<long, List<DtNode>>();
+            m_nodes = new List<DtNode>();
         }
 
         public void Clear()
         {
-            m_nodes.Clear();
             m_map.Clear();
+            m_nodeCount = 0;
         }
 
-        public List<DtNode> FindNodes(long id)
+        public int GetNodeCount()
         {
-            var hasNode = m_map.TryGetValue(id, out var nodes);
-            ;
-            if (nodes == null)
-            {
-                nodes = new List<DtNode>();
+            return m_nodeCount;
         }
 
-            return nodes;
+        public int FindNodes(long id, out List<DtNode> nodes)
+        {
+            var hasNode = m_map.TryGetValue(id, out nodes);
+            if (hasNode)
+            {
+                return nodes.Count;
+            }
+
+            return 0;
         }
 
         public DtNode FindNode(long id)
         {
-            var hasNode = m_map.TryGetValue(id, out var nodes);
-            ;
+            m_map.TryGetValue(id, out var nodes);
             if (nodes != null && 0 != nodes.Count)
             {
                 return nodes[0];
@@ -63,7 +71,7 @@ namespace DotRecast.Detour
 
         public DtNode GetNode(long id, int state)
         {
-            var hasNode = m_map.TryGetValue(id, out var nodes);
+            m_map.TryGetValue(id, out var nodes);
             if (nodes != null)
             {
                 foreach (DtNode node in nodes)
@@ -85,10 +93,22 @@ namespace DotRecast.Detour
 
         private DtNode Create(long id, int state, List<DtNode> nodes)
         {
-            DtNode node = new DtNode(m_nodes.Count + 1);
+            if (m_nodes.Count <= m_nodeCount)
+            {
+                var newNode = new DtNode(m_nodeCount);
+                m_nodes.Add(newNode);
+            }
+
+            int i = m_nodeCount;
+            m_nodeCount++;
+            var node = m_nodes[i];
+            node.pidx = 0;
+            node.cost = 0;
+            node.total = 0;
             node.id = id;
             node.state = state;
-            m_nodes.Add(node);
+            node.flags = 0;
+            node.shortcut = null;
 
             nodes.Add(node);
             return node;
@@ -96,12 +116,16 @@ namespace DotRecast.Detour
 
         public int GetNodeIdx(DtNode node)
         {
-            return node != null ? node.index : 0;
+            return node != null
+                ? node.ptr + 1
+                : 0;
         }
 
         public DtNode GetNodeAtIdx(int idx)
         {
-            return idx != 0 ? m_nodes[idx - 1] : null;
+            return idx != 0
+                ? m_nodes[idx - 1]
+                : null;
         }
 
         public DtNode GetNode(long refs)
@@ -109,9 +133,9 @@ namespace DotRecast.Detour
             return GetNode(refs, 0);
         }
 
-        public Dictionary<long, List<DtNode>> GetNodeMap()
+        public IEnumerable<DtNode> AsEnumerable()
         {
-            return m_map;
+            return m_nodes.Take(m_nodeCount);
         }
     }
 }

src/DotRecast.Detour/DtNodeQueue.cs

@@ -24,7 +24,12 @@ namespace DotRecast.Detour
 {
     public class DtNodeQueue
     {
-        private readonly RcSortedQueue<DtNode> m_heap = new RcSortedQueue<DtNode>((n1, n2) => n1.total.CompareTo(n2.total));
+        private readonly RcSortedQueue<DtNode> m_heap;
+
+        public DtNodeQueue()
+        {
+            m_heap = new RcSortedQueue<DtNode>(DtNode.ComparisonNodeTotal);
+        }
 
         public int Count()
         {
@@ -43,9 +48,7 @@ namespace DotRecast.Detour
 
         public DtNode Pop()
         {
-            var node = Peek();
-            m_heap.Remove(node);
-            return node;
+            return m_heap.Dequeue();
         }
 
         public void Push(DtNode node)
@@ -61,7 +64,7 @@ namespace DotRecast.Detour
 
         public bool IsEmpty()
         {
-            return 0 == m_heap.Count();
+            return m_heap.IsEmpty();
         }
     }
 }

src/DotRecast.Detour/DtOffMeshConnection.cs

@@ -18,7 +18,6 @@ freely, subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-using System.Numerics;
 using DotRecast.Core.Numerics;
 
 namespace DotRecast.Detour
@@ -28,7 +27,7 @@ namespace DotRecast.Detour
     public class DtOffMeshConnection
     {
         /// The endpoints of the connection. [(ax, ay, az, bx, by, bz)]
-        public Vector3[] pos = new Vector3[2];
+        public RcVec3f[] pos = new RcVec3f[2];
 
         /// The radius of the endpoints. [Limit: >= 0]
         public float rad;

src/DotRecast.Detour/DtPathUtils.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -29,12 +28,12 @@ namespace DotRecast.Detour
     {
         private const int MAX_STEER_POINTS = 3;
 
-        public static bool GetSteerTarget(DtNavMeshQuery navQuery, Vector3 startPos, Vector3 endPos,
+        public static bool GetSteerTarget(DtNavMeshQuery navQuery, RcVec3f startPos, RcVec3f endPos,
             float minTargetDist,
             List<long> path,
-            out Vector3 steerPos, out int steerPosFlag, out long steerPosRef)
+            out RcVec3f steerPos, out int steerPosFlag, out long steerPosRef)
         {
-            steerPos = Vector3.Zero;
+            steerPos = RcVec3f.Zero;
             steerPosFlag = 0;
             steerPosRef = 0;
 
@@ -69,7 +68,7 @@ namespace DotRecast.Detour
             return true;
         }
 
-        public static bool InRange(Vector3 v1, Vector3 v2, float r, float h)
+        public static bool InRange(RcVec3f v1, RcVec3f v2, float r, float h)
         {
             float dx = v2.X - v1.X;
             float dy = v2.Y - v1.Y;
@@ -142,7 +141,7 @@ namespace DotRecast.Detour
             return path;
         }
 
-        public static List<long> MergeCorridorStartMoved(List<long> path, List<long> visited)
+        public static List<long> MergeCorridorStartMoved(List<long> path, int npath, int maxPath, List<long> visited)
         {
             int furthestPath = -1;
             int furthestVisited = -1;
@@ -187,7 +186,7 @@ namespace DotRecast.Detour
             return result;
         }
 
-        public static List<long> MergeCorridorEndMoved(List<long> path, List<long> visited)
+        public static List<long> MergeCorridorEndMoved(List<long> path, int npath, int maxPath, List<long> visited)
         {
             int furthestPath = -1;
             int furthestVisited = -1;
@@ -224,7 +223,7 @@ namespace DotRecast.Detour
             return result;
         }
 
-        public static List<long> MergeCorridorStartShortcut(List<long> path, List<long> visited)
+        public static List<long> MergeCorridorStartShortcut(List<long> path, int npath, int maxPath, List<long> visited)
         {
             int furthestPath = -1;
             int furthestVisited = -1;

src/DotRecast.Detour/DtPolyPoint.cs

@@ -1,14 +1,13 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
     public readonly struct DtPolyPoint
     {
         public readonly long refs;
-        public readonly Vector3 pt;
+        public readonly RcVec3f pt;
 
-        public DtPolyPoint(long polyRefs, Vector3 polyPt)
+        public DtPolyPoint(long polyRefs, RcVec3f polyPt)
         {
             refs = polyRefs;
             pt = polyPt;

src/DotRecast.Detour/DtQueryData.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -30,8 +29,8 @@ namespace DotRecast.Detour
         public float lastBestNodeCost;
         public long startRef;
         public long endRef;
-        public Vector3 startPos;
-        public Vector3 endPos;
+        public RcVec3f startPos;
+        public RcVec3f endPos;
         public IDtQueryFilter filter;
         public int options;
         public float raycastLimitSqr;

src/DotRecast.Detour/DtQueryDefaultFilter.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -85,10 +84,10 @@ namespace DotRecast.Detour
             return (poly.flags & m_includeFlags) != 0 && (poly.flags & m_excludeFlags) == 0;
         }
 
-        public float GetCost(Vector3 pa, Vector3 pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef,
+        public float GetCost(RcVec3f pa, RcVec3f pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef,
             DtMeshTile curTile, DtPoly curPoly, long nextRef, DtMeshTile nextTile, DtPoly nextPoly)
         {
-            return Vector3.Distance(pa, pb) * m_areaCost[curPoly.GetArea()];
+            return RcVec3f.Distance(pa, pb) * m_areaCost[curPoly.GetArea()];
         }
 
         public int GetIncludeFlags()

src/DotRecast.Detour/DtQueryEmptyFilter.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -16,7 +15,7 @@ namespace DotRecast.Detour
             return false;
         }
 
-        public float GetCost(Vector3 pa, Vector3 pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef,
+        public float GetCost(RcVec3f pa, RcVec3f pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef,
             DtMeshTile curTile, DtPoly curPoly, long nextRef, DtMeshTile nextTile, DtPoly nextPoly)
         {
             return 0;

src/DotRecast.Detour/DtQueryNoOpFilter.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -16,7 +15,7 @@ namespace DotRecast.Detour
             return true;
         }
 
-        public float GetCost(Vector3 pa, Vector3 pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef,
+        public float GetCost(RcVec3f pa, RcVec3f pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef,
             DtMeshTile curTile, DtPoly curPoly, long nextRef, DtMeshTile nextTile, DtPoly nextPoly)
         {
             return 0;

src/DotRecast.Detour/DtRaycastHit.cs

@@ -20,28 +20,27 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
-    /**
- * Provides information about raycast hit. Filled by NavMeshQuery::raycast
- */
-    public class DtRaycastHit
+    /// Provides information about raycast hit
+    /// filled by dtNavMeshQuery::raycast
+    /// @ingroup detour
+    public struct DtRaycastHit
     {
-        /** The hit parameter. (float.MaxValue if no wall hit.) */
+        /// The hit parameter. (FLT_MAX if no wall hit.)
         public float t;
 
-        /** hitNormal The normal of the nearest wall hit. [(x, y, z)] */
-        public Vector3 hitNormal = new Vector3();
+        /// hitNormal	The normal of the nearest wall hit. [(x, y, z)]
+        public RcVec3f hitNormal;
 
-        /** Visited polygons. */
-        public readonly List<long> path = new List<long>();
-
-        /** The cost of the path until hit. */
-        public float pathCost;
-
-        /** The index of the edge on the readonly polygon where the wall was hit. */
+        /// The index of the edge on the final polygon where the wall was hit.
         public int hitEdgeIndex;
+
+        /// Pointer to an array of reference ids of the visited polygons. [opt]
+        public List<long> path;
+
+        ///  The cost of the path until hit.
+        public float pathCost;
     }
 }

src/DotRecast.Detour/DtStraightPath.cs

@@ -19,18 +19,17 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
     //TODO: (PP) Add comments
     public readonly struct DtStraightPath
     {
-        public readonly Vector3 pos;
+        public readonly RcVec3f pos;
         public readonly int flags;
         public readonly long refs;
 
-        public DtStraightPath(Vector3 pos, int flags, long refs)
+        public DtStraightPath(RcVec3f pos, int flags, long refs)
         {
             this.pos = pos;
             this.flags = flags;

src/DotRecast.Detour/DtStrictDtPolygonByCircleConstraint.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -32,7 +31,7 @@ namespace DotRecast.Detour
             return temp;
         }
 
-        public float[] Apply(float[] verts, Vector3 center, float radius)
+        public float[] Apply(float[] verts, RcVec3f center, float radius)
         {
             float radiusSqr = radius * radius;
             int outsideVertex = -1;
@@ -63,7 +62,7 @@ namespace DotRecast.Detour
         }
 
 
-        private float[] Circle(Vector3 center, float radius)
+        private float[] Circle(RcVec3f center, float radius)
         {
             float[] circle = new float[12 * 3];
             for (int i = 0; i < CIRCLE_SEGMENTS * 3; i += 3)

src/DotRecast.Detour/DtUtils.cs

@@ -1,7 +1,6 @@
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -47,14 +46,14 @@ namespace DotRecast.Detour
         ///
         /// Basically, this function will return true if the specified points are
         /// close enough to eachother to be considered colocated.
-        public static bool VEqual(Vector3 p0, Vector3 p1)
+        public static bool VEqual(RcVec3f p0, RcVec3f p1)
         {
             return VEqual(p0, p1, EQUAL_THRESHOLD);
         }
 
-        public static bool VEqual(Vector3 p0, Vector3 p1, float thresholdSqr)
+        public static bool VEqual(RcVec3f p0, RcVec3f p1, float thresholdSqr)
         {
-            float d = Vector3.DistanceSquared(p0, p1);
+            float d = RcVec3f.DistanceSquared(p0, p1);
             return d < thresholdSqr;
         }
 
@@ -81,7 +80,7 @@ namespace DotRecast.Detour
         /// @param[in] bmax Maximum bounds of box B. [(x, y, z)]
         /// @return True if the two AABB's overlap.
         /// @see dtOverlapQuantBounds
-        public static bool OverlapBounds(Vector3 amin, Vector3 amax, Vector3 bmin, Vector3 bmax)
+        public static bool OverlapBounds(RcVec3f amin, RcVec3f amax, RcVec3f bmin, RcVec3f bmax)
         {
             bool overlap = true;
             overlap = (amin.X > bmax.X || amax.X < bmin.X) ? false : overlap;
@@ -106,10 +105,10 @@ namespace DotRecast.Detour
                 int va = j * 3;
                 int vb = i * 3;
 
-                Vector3 n = new Vector3(polya[vb + 2] - polya[va + 2], 0, -(polya[vb + 0] - polya[va + 0]));
+                RcVec3f n = new RcVec3f(polya[vb + 2] - polya[va + 2], 0, -(polya[vb + 0] - polya[va + 0]));
 
-                Vector2 aminmax = ProjectPoly(n, polya, npolya);
-                Vector2 bminmax = ProjectPoly(n, polyb, npolyb);
+                RcVec2f aminmax = ProjectPoly(n, polya, npolya);
+                RcVec2f bminmax = ProjectPoly(n, polyb, npolyb);
                 if (!OverlapRange(aminmax.X, aminmax.Y, bminmax.X, bminmax.Y, eps))
                 {
                     // Found separating axis
@@ -122,10 +121,10 @@ namespace DotRecast.Detour
                 int va = j * 3;
                 int vb = i * 3;
 
-                Vector3 n = new Vector3(polyb[vb + 2] - polyb[va + 2], 0, -(polyb[vb + 0] - polyb[va + 0]));
+                RcVec3f n = new RcVec3f(polyb[vb + 2] - polyb[va + 2], 0, -(polyb[vb + 0] - polyb[va + 0]));
 
-                Vector2 aminmax = ProjectPoly(n, polya, npolya);
-                Vector2 bminmax = ProjectPoly(n, polyb, npolyb);
+                RcVec2f aminmax = ProjectPoly(n, polya, npolya);
+                RcVec2f bminmax = ProjectPoly(n, polyb, npolyb);
                 if (!OverlapRange(aminmax.X, aminmax.Y, bminmax.X, bminmax.Y, eps))
                 {
                     // Found separating axis
@@ -155,7 +154,7 @@ namespace DotRecast.Detour
             return acx * abz - abx * acz;
         }
 
-        public static float TriArea2D(Vector3 a, Vector3 b, Vector3 c)
+        public static float TriArea2D(RcVec3f a, RcVec3f b, RcVec3f c)
         {
             float abx = b.X - a.X;
             float abz = b.Z - a.Z;
@@ -166,7 +165,7 @@ namespace DotRecast.Detour
 
         // Returns a random point in a convex polygon.
         // Adapted from Graphics Gems article.
-        public static Vector3 RandomPointInConvexPoly(float[] pts, int npts, float[] areas, float s, float t)
+        public static RcVec3f RandomPointInConvexPoly(float[] pts, int npts, float[] areas, float s, float t)
         {
             // Calc triangle araes
             float areasum = 0.0f;
@@ -203,7 +202,7 @@ namespace DotRecast.Detour
             int pb = (tri - 1) * 3;
             int pc = tri * 3;
 
-            return new Vector3()
+            return new RcVec3f()
             {
                 X = a * pts[pa] + b * pts[pb] + c * pts[pc],
                 Y = a * pts[pa + 1] + b * pts[pb + 1] + c * pts[pc + 1],
@@ -211,14 +210,14 @@ namespace DotRecast.Detour
             };
         }
 
-        public static bool ClosestHeightPointTriangle(Vector3 p, Vector3 a, Vector3 b, Vector3 c, out float h)
+        public static bool ClosestHeightPointTriangle(RcVec3f p, RcVec3f a, RcVec3f b, RcVec3f c, out float h)
         {
             const float EPS = 1e-6f;
 
             h = 0;
-            Vector3 v0 = Vector3.Subtract(c, a);
-            Vector3 v1 = Vector3.Subtract(b, a);
-            Vector3 v2 = Vector3.Subtract(p, a);
+            RcVec3f v0 = RcVec3f.Subtract(c, a);
+            RcVec3f v1 = RcVec3f.Subtract(b, a);
+            RcVec3f v2 = RcVec3f.Subtract(p, a);
 
             // Compute scaled barycentric coordinates
             float denom = v0.X * v1.Z - v0.Z * v1.X;
@@ -247,7 +246,7 @@ namespace DotRecast.Detour
             return false;
         }
 
-        public static Vector2 ProjectPoly(Vector3 axis, float[] poly, int npoly)
+        public static RcVec2f ProjectPoly(RcVec3f axis, float[] poly, int npoly)
         {
             float rmin, rmax;
             rmin = rmax = axis.Dot2D(poly, 0);
@@ -258,7 +257,7 @@ namespace DotRecast.Detour
                 rmax = Math.Max(rmax, d);
             }
 
-            return new Vector2
+            return new RcVec2f
             {
                 X = rmin,
                 Y = rmax,
@@ -268,7 +267,7 @@ namespace DotRecast.Detour
         /// @par
         ///
         /// All points are projected onto the xz-plane, so the y-values are ignored.
-        public static bool PointInPolygon(Vector3 pt, float[] verts, int nverts)
+        public static bool PointInPolygon(RcVec3f pt, float[] verts, int nverts)
         {
             // TODO: Replace pnpoly with triArea2D tests?
             int i, j;
@@ -287,7 +286,7 @@ namespace DotRecast.Detour
             return c;
         }
 
-        public static bool DistancePtPolyEdgesSqr(Vector3 pt, float[] verts, int nverts, float[] ed, float[] et)
+        public static bool DistancePtPolyEdgesSqr(RcVec3f pt, float[] verts, int nverts, float[] ed, float[] et)
         {
             // TODO: Replace pnpoly with triArea2D tests?
             int i, j;
@@ -308,14 +307,14 @@ namespace DotRecast.Detour
             return c;
         }
 
-        public static float DistancePtSegSqr2D(Vector3 pt, float[] verts, int p, int q, out float t)
+        public static float DistancePtSegSqr2D(RcVec3f pt, float[] verts, int p, int q, out float t)
         {
             var vp = RcVecUtils.Create(verts, p);
             var vq = RcVecUtils.Create(verts, q);
             return DistancePtSegSqr2D(pt, vp, vq, out t);
         }
 
-        public static float DistancePtSegSqr2D(Vector3 pt, Vector3 p, Vector3 q, out float t)
+        public static float DistancePtSegSqr2D(RcVec3f pt, RcVec3f p, RcVec3f q, out float t)
         {
             float pqx = q.X - p.X;
             float pqz = q.Z - p.Z;
@@ -342,8 +341,8 @@ namespace DotRecast.Detour
             return dx * dx + dz * dz;
         }
 
-        public static bool IntersectSegmentPoly2D(Vector3 p0, Vector3 p1,
-            Vector3[] verts, int nverts,
+        public static bool IntersectSegmentPoly2D(RcVec3f p0, RcVec3f p1,
+            RcVec3f[] verts, int nverts,
             out float tmin, out float tmax,
             out int segMin, out int segMax)
         {
@@ -354,15 +353,15 @@ namespace DotRecast.Detour
             segMin = -1;
             segMax = -1;
 
-            var dir = Vector3.Subtract(p1, p0);
+            var dir = RcVec3f.Subtract(p1, p0);
 
             var p0v = p0;
             for (int i = 0, j = nverts - 1; i < nverts; j = i++)
             {
-                Vector3 vpj = verts[j];
-                Vector3 vpi = verts[i];
-                var edge = Vector3.Subtract(vpi, vpj);
-                var diff = Vector3.Subtract(p0v, vpj);
+                RcVec3f vpj = verts[j];
+                RcVec3f vpi = verts[i];
+                var edge = RcVec3f.Subtract(vpi, vpj);
+                var diff = RcVec3f.Subtract(p0v, vpj);
                 float n = RcVecUtils.Perp2D(edge, diff);
                 float d = RcVecUtils.Perp2D(dir, edge);
                 if (MathF.Abs(d) < EPS)
@@ -418,14 +417,14 @@ namespace DotRecast.Detour
         }
 
 
-        public static bool IntersectSegSeg2D(Vector3 ap, Vector3 aq, Vector3 bp, Vector3 bq, out float s, out float t)
+        public static bool IntersectSegSeg2D(RcVec3f ap, RcVec3f aq, RcVec3f bp, RcVec3f bq, out float s, out float t)
         {
             s = 0;
             t = 0;
 
-            Vector3 u = Vector3.Subtract(aq, ap);
-            Vector3 v = Vector3.Subtract(bq, bp);
-            Vector3 w = Vector3.Subtract(ap, bp);
+            RcVec3f u = RcVec3f.Subtract(aq, ap);
+            RcVec3f v = RcVec3f.Subtract(bq, bp);
+            RcVec3f w = RcVec3f.Subtract(ap, bp);
             float d = RcVecUtils.PerpXZ(u, v);
             if (MathF.Abs(d) < 1e-6f)
             {

src/DotRecast.Detour/IDtPolygonByCircleConstraint.cs

@@ -19,12 +19,11 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
     public interface IDtPolygonByCircleConstraint
     {
-        float[] Apply(float[] polyVerts, Vector3 circleCenter, float radius);
+        float[] Apply(float[] polyVerts, RcVec3f circleCenter, float radius);
     }
 }

src/DotRecast.Detour/IDtQueryFilter.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
@@ -27,7 +26,7 @@ namespace DotRecast.Detour
     {
         bool PassFilter(long refs, DtMeshTile tile, DtPoly poly);
 
-        float GetCost(Vector3 pa, Vector3 pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef, DtMeshTile curTile,
+        float GetCost(RcVec3f pa, RcVec3f pb, long prevRef, DtMeshTile prevTile, DtPoly prevPoly, long curRef, DtMeshTile curTile,
             DtPoly curPoly, long nextRef, DtMeshTile nextTile, DtPoly nextPoly);
     }
 }

src/DotRecast.Detour/IDtQueryHeuristic.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour
 {
     public interface IDtQueryHeuristic
     {
-        float GetCost(Vector3 neighbourPos, Vector3 endPos);
+        float GetCost(RcVec3f neighbourPos, RcVec3f endPos);
     }
 }

src/DotRecast.Detour/Io/DtMeshSetWriter.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Io
 {

src/DotRecast.Detour/Io/DtNavMeshParamWriter.cs

@@ -1,7 +1,6 @@
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Detour.Io
 {

src/DotRecast.Recast.Demo/DotRecast.Recast.Demo.csproj

@@ -7,11 +7,12 @@
     <PackageId>DotRecast.Recast.Demo</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Recast.Demo/Draw/DebugDraw.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using Silk.NET.OpenGL;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Toolset.Builder;
 
 namespace DotRecast.Recast.Demo.Draw;
@@ -93,7 +92,7 @@ public class DebugDraw
         GetOpenGlDraw().Vertex(pos, color);
     }
 
-    public void Vertex(Vector3 pos, int color)
+    public void Vertex(RcVec3f pos, int color)
     {
         GetOpenGlDraw().Vertex(pos, color);
     }
@@ -103,7 +102,7 @@ public class DebugDraw
         GetOpenGlDraw().Vertex(x, y, z, color);
     }
 
-    public void Vertex(Vector3 pos, int color, Vector2 uv)
+    public void Vertex(RcVec3f pos, int color, RcVec2f uv)
     {
         GetOpenGlDraw().Vertex(pos, color, uv);
     }
@@ -337,12 +336,12 @@ public class DebugDraw
         float dy = y1 - y0;
         float dz = z1 - z0;
         float len = MathF.Sqrt(dx * dx + dy * dy + dz * dz);
-        Vector3 prev = new Vector3();
+        RcVec3f prev = new RcVec3f();
         EvalArc(x0, y0, z0, dx, dy, dz, len * h, PAD, ref prev);
         for (int i = 1; i <= NUM_ARC_PTS; ++i)
         {
             float u = PAD + i * ARC_PTS_SCALE;
-            Vector3 pt = new Vector3();
+            RcVec3f pt = new RcVec3f();
             EvalArc(x0, y0, z0, dx, dy, dz, len * h, u, ref pt);
             Vertex(prev.X, prev.Y, prev.Z, col);
             Vertex(pt.X, pt.Y, pt.Z, col);
@@ -354,8 +353,8 @@ public class DebugDraw
         // End arrows
         if (as0 > 0.001f)
         {
-            Vector3 p = new Vector3();
-            Vector3 q = new Vector3();
+            RcVec3f p = new RcVec3f();
+            RcVec3f q = new RcVec3f();
             EvalArc(x0, y0, z0, dx, dy, dz, len * h, PAD, ref p);
             EvalArc(x0, y0, z0, dx, dy, dz, len * h, PAD + 0.05f, ref q);
             AppendArrowHead(p, q, as0, col);
@@ -363,15 +362,15 @@ public class DebugDraw
 
         if (as1 > 0.001f)
         {
-            Vector3 p = new Vector3();
-            Vector3 q = new Vector3();
+            RcVec3f p = new RcVec3f();
+            RcVec3f q = new RcVec3f();
             EvalArc(x0, y0, z0, dx, dy, dz, len * h, 1 - PAD, ref p);
             EvalArc(x0, y0, z0, dx, dy, dz, len * h, 1 - (PAD + 0.05f), ref q);
             AppendArrowHead(p, q, as1, col);
         }
     }
 
-    private void EvalArc(float x0, float y0, float z0, float dx, float dy, float dz, float h, float u, ref Vector3 res)
+    private void EvalArc(float x0, float y0, float z0, float dx, float dy, float dz, float h, float u, ref RcVec3f res)
     {
         res.X = x0 + dx * u;
         res.Y = y0 + dy * u + h * (1 - (u * 2 - 1) * (u * 2 - 1));
@@ -462,15 +461,15 @@ public class DebugDraw
         Vertex(x1, y1, z1, col);
 
         // End arrows
-        Vector3 p = new Vector3(x0, y0, z0);
-        Vector3 q = new Vector3(x1, y1, z1);
+        RcVec3f p = new RcVec3f(x0, y0, z0);
+        RcVec3f q = new RcVec3f(x1, y1, z1);
         if (as0 > 0.001f)
             AppendArrowHead(p, q, as0, col);
         if (as1 > 0.001f)
             AppendArrowHead(q, p, as1, col);
     }
 
-    void AppendArrowHead(Vector3 p, Vector3 q, float s, int col)
+    void AppendArrowHead(RcVec3f p, RcVec3f q, float s, int col)
     {
         const float eps = 0.001f;
         if (VdistSqr(p, q) < eps * eps)
@@ -478,9 +477,9 @@ public class DebugDraw
             return;
         }
 
-        Vector3 ax = new Vector3();
-        Vector3 ay = new Vector3(0, 1, 0);
-        Vector3 az = new Vector3();
+        RcVec3f ax = new RcVec3f();
+        RcVec3f ay = new RcVec3f(0, 1, 0);
+        RcVec3f az = new RcVec3f();
         Vsub(ref az, q, p);
         Vnormalize(ref az);
         Vcross(ref ax, ay, az);
@@ -496,14 +495,14 @@ public class DebugDraw
         Vertex(p.X + az.X * s - ax.X * s / 3, p.Y + az.Y * s - ax.Y * s / 3, p.Z + az.Z * s - ax.Z * s / 3, col);
     }
 
-    public void Vcross(ref Vector3 dest, Vector3 v1, Vector3 v2)
+    public void Vcross(ref RcVec3f dest, RcVec3f v1, RcVec3f v2)
     {
         dest.X = v1.Y * v2.Z - v1.Z * v2.Y;
         dest.Y = v1.Z * v2.X - v1.X * v2.Z;
         dest.Z = v1.X * v2.Y - v1.Y * v2.X;
     }
 
-    public void Vnormalize(ref Vector3 v)
+    public void Vnormalize(ref RcVec3f v)
     {
         float d = (float)(1.0f / Math.Sqrt(v.X * v.X + v.Y * v.Y + v.Z * v.Z));
         v.X *= d;
@@ -511,14 +510,14 @@ public class DebugDraw
         v.Z *= d;
     }
 
-    public void Vsub(ref Vector3 dest, Vector3 v1, Vector3 v2)
+    public void Vsub(ref RcVec3f dest, RcVec3f v1, RcVec3f v2)
     {
         dest.X = v1.X - v2.X;
         dest.Y = v1.Y - v2.Y;
         dest.Z = v1.Z - v2.Z;
     }
 
-    public float VdistSqr(Vector3 v1, Vector3 v2)
+    public float VdistSqr(RcVec3f v1, RcVec3f v2)
     {
         float x = v1.X - v2.X;
         float y = v1.Y - v2.Y;
@@ -638,7 +637,7 @@ public class DebugDraw
         return _projectionMatrix;
     }
 
-    public RcMatrix4x4f ViewMatrix(Vector3 cameraPos, Vector2 cameraEulers)
+    public RcMatrix4x4f ViewMatrix(RcVec3f cameraPos, RcVec2f cameraEulers)
     {
         var rx = RcMatrix4x4f.CreateFromRotate(cameraEulers.X, 1, 0, 0);
         var ry = RcMatrix4x4f.CreateFromRotate(cameraEulers.Y, 0, 1, 0);
@@ -747,7 +746,7 @@ public class DebugDraw
         return true;
     }
 
-    public bool FrustumTest(Vector3 bmin, Vector3 bmax)
+    public bool FrustumTest(RcVec3f bmin, RcVec3f bmax)
     {
         return FrustumTest(new float[] { bmin.X, bmin.Y, bmin.Z, bmax.X, bmax.Y, bmax.Z });
     }

src/DotRecast.Recast.Demo/Draw/GLU.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Demo.Draw;
 
@@ -66,7 +65,7 @@ public static class GLU
         matrix.M44 = 0.0f;
     }
 
-    public static int GlhUnProjectf(float winx, float winy, float winz, float[] modelview, float[] projection, int[] viewport, ref Vector3 objectCoordinate)
+    public static int GlhUnProjectf(float winx, float winy, float winz, float[] modelview, float[] projection, int[] viewport, ref RcVec3f objectCoordinate)
     {
         // Transformation matrices
         float[] m = new float[16], A = new float[16];

src/DotRecast.Recast.Demo/Draw/IOpenGLDraw.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Demo.Draw;
 
@@ -16,9 +15,9 @@ public interface IOpenGLDraw
     void Vertex(float x, float y, float z, int color);
 
     void Vertex(float[] pos, int color);
-    void Vertex(Vector3 pos, int color);
+    void Vertex(RcVec3f pos, int color);
 
-    void Vertex(Vector3 pos, int color, Vector2 uv);
+    void Vertex(RcVec3f pos, int color, RcVec2f uv);
 
     void Vertex(float x, float y, float z, int color, float u, float v);
 

src/DotRecast.Recast.Demo/Draw/ModernOpenGLDraw.cs

@@ -2,7 +2,6 @@ using System;
 using System.IO;
 using Silk.NET.OpenGL;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Demo.Draw;
 
@@ -286,13 +285,13 @@ public class ModernOpenGLDraw : IOpenGLDraw
         vertices.Add(new OpenGLVertex(pos, color));
     }
 
-    public void Vertex(Vector3 pos, int color)
+    public void Vertex(RcVec3f pos, int color)
     {
         vertices.Add(new OpenGLVertex(pos, color));
     }
 
 
-    public void Vertex(Vector3 pos, int color, Vector2 uv)
+    public void Vertex(RcVec3f pos, int color, RcVec2f uv)
     {
         vertices.Add(new OpenGLVertex(pos, uv, color));
     }

src/DotRecast.Recast.Demo/Draw/NavMeshRenderer.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Recast.Toolset.Builder;
 using DotRecast.Recast.Toolset.Geom;
@@ -81,8 +80,8 @@ public class NavMeshRenderer
         if (geom != null)
         {
             int gw = 0, gh = 0;
-            Vector3 bmin = geom.GetMeshBoundsMin();
-            Vector3 bmax = geom.GetMeshBoundsMax();
+            RcVec3f bmin = geom.GetMeshBoundsMin();
+            RcVec3f bmax = geom.GetMeshBoundsMax();
             CalcGridSize(bmin, bmax, settings.cellSize, out gw, out gh);
             int tw = (gw + settings.tileSize - 1) / settings.tileSize;
             int th = (gh + settings.tileSize - 1) / settings.tileSize;
@@ -211,8 +210,8 @@ public class NavMeshRenderer
     private void DrawGeomBounds(DemoInputGeomProvider geom)
     {
         // Draw bounds
-        Vector3 bmin = geom.GetMeshBoundsMin();
-        Vector3 bmax = geom.GetMeshBoundsMax();
+        RcVec3f bmin = geom.GetMeshBoundsMin();
+        RcVec3f bmax = geom.GetMeshBoundsMax();
         _debugDraw.DebugDrawBoxWire(bmin.X, bmin.Y, bmin.Z, bmax.X, bmax.Y, bmax.Z,
             DebugDraw.DuRGBA(255, 255, 255, 128), 1.0f);
         _debugDraw.Begin(DebugDrawPrimitives.POINTS, 5.0f);
@@ -261,8 +260,8 @@ public class NavMeshRenderer
             int col = DebugDraw.DuTransCol(DebugDraw.AreaToCol(vol.areaMod.GetMaskedValue()), 32);
             for (int j = 0, k = vol.verts.Length - 3; j < vol.verts.Length; k = j, j += 3)
             {
-                var va = new Vector3(vol.verts[k], vol.verts[k + 1], vol.verts[k + 2]);
-                var vb = new Vector3(vol.verts[j], vol.verts[j + 1], vol.verts[j + 2]);
+                var va = new RcVec3f(vol.verts[k], vol.verts[k + 1], vol.verts[k + 2]);
+                var vb = new RcVec3f(vol.verts[j], vol.verts[j + 1], vol.verts[j + 2]);
 
                 _debugDraw.Vertex(vol.verts[0], vol.hmax, vol.verts[2], col);
                 _debugDraw.Vertex(vb.X, vol.hmax, vb.Z, col);
@@ -286,8 +285,8 @@ public class NavMeshRenderer
             int col = DebugDraw.DuTransCol(DebugDraw.AreaToCol(vol.areaMod.GetMaskedValue()), 220);
             for (int j = 0, k = vol.verts.Length - 3; j < vol.verts.Length; k = j, j += 3)
             {
-                var va = new Vector3(vol.verts[k], vol.verts[k + 1], vol.verts[k + 2]);
-                var vb = new Vector3(vol.verts[j], vol.verts[j + 1], vol.verts[j + 2]);
+                var va = new RcVec3f(vol.verts[k], vol.verts[k + 1], vol.verts[k + 2]);
+                var vb = new RcVec3f(vol.verts[j], vol.verts[j + 1], vol.verts[j + 2]);
                 _debugDraw.Vertex(va.X, vol.hmin, va.Z, DebugDraw.DuDarkenCol(col));
                 _debugDraw.Vertex(vb.X, vol.hmin, vb.Z, DebugDraw.DuDarkenCol(col));
                 _debugDraw.Vertex(va.X, vol.hmax, va.Z, col);

src/DotRecast.Recast.Demo/Draw/OpenGLVertex.cs

@@ -2,7 +2,6 @@ using System;
 using System.IO;
 using System.Runtime.InteropServices;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Demo.Draw;
 
@@ -27,7 +26,7 @@ public struct OpenGLVertex
     [FieldOffset(20)]
     private readonly int color;
 
-    public OpenGLVertex(Vector3 pos, Vector2 uv, int color) :
+    public OpenGLVertex(RcVec3f pos, RcVec2f uv, int color) :
         this(pos.X, pos.Y, pos.Z, uv.X, uv.Y, color)
     {
     }
@@ -37,7 +36,7 @@ public struct OpenGLVertex
     {
     }
 
-    public OpenGLVertex(Vector3 pos, int color) :
+    public OpenGLVertex(RcVec3f pos, int color) :
         this(pos.X, pos.Y, pos.Z, 0f, 0f, color)
     {
     }

src/DotRecast.Recast.Demo/Draw/RecastDebugDraw.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Recast.Toolset.Builder;
 using Silk.NET.OpenGL;
@@ -42,9 +41,9 @@ public class RecastDebugDraw : DebugDraw
     {
         float walkableThr = MathF.Cos(walkableSlopeAngle / 180.0f * MathF.PI);
 
-        Vector2 uva = Vector2.Zero;
-        Vector2 uvb = Vector2.Zero;
-        Vector2 uvc = Vector2.Zero;
+        RcVec2f uva = RcVec2f.Zero;
+        RcVec2f uvb = RcVec2f.Zero;
+        RcVec2f uvc = RcVec2f.Zero;
 
         Texture(true);
 
@@ -52,7 +51,7 @@ public class RecastDebugDraw : DebugDraw
         Begin(DebugDrawPrimitives.TRIS);
         for (int i = 0; i < tris.Length; i += 3)
         {
-            Vector3 norm = new Vector3(normals[i], normals[i + 1], normals[i + 2]);
+            RcVec3f norm = new RcVec3f(normals[i], normals[i + 1], normals[i + 2]);
 
             int color;
             char a = (char)(220 * (2 + norm.X + norm.Y) / 4);
@@ -65,9 +64,9 @@ public class RecastDebugDraw : DebugDraw
                 color = DuRGBA(a, a, a, 255);
             }
 
-            Vector3 va = new Vector3(verts[tris[i] * 3], verts[tris[i] * 3 + 1], verts[tris[i] * 3 + 2]);
-            Vector3 vb = new Vector3(verts[tris[i + 1] * 3], verts[tris[i + 1] * 3 + 1], verts[tris[i + 1] * 3 + 2]);
-            Vector3 vc = new Vector3(verts[tris[i + 2] * 3], verts[tris[i + 2] * 3 + 1], verts[tris[i + 2] * 3 + 2]);
+            RcVec3f va = new RcVec3f(verts[tris[i] * 3], verts[tris[i] * 3 + 1], verts[tris[i] * 3 + 2]);
+            RcVec3f vb = new RcVec3f(verts[tris[i + 1] * 3], verts[tris[i + 1] * 3 + 1], verts[tris[i + 1] * 3 + 2]);
+            RcVec3f vc = new RcVec3f(verts[tris[i + 2] * 3], verts[tris[i + 2] * 3 + 1], verts[tris[i + 2] * 3 + 2]);
 
             int ax = 0, ay = 0;
             if (MathF.Abs(norm.Y) > MathF.Abs(norm.Get(ax)))
@@ -187,11 +186,11 @@ public class RecastDebugDraw : DebugDraw
                 }
 
                 DtOffMeshConnection con = tile.data.offMeshCons[i - tile.data.header.offMeshBase];
-                Vector3 va = new Vector3(
+                RcVec3f va = new RcVec3f(
                     tile.data.verts[p.verts[0] * 3], tile.data.verts[p.verts[0] * 3 + 1],
                     tile.data.verts[p.verts[0] * 3 + 2]
                 );
-                Vector3 vb = new Vector3(
+                RcVec3f vb = new RcVec3f(
                     tile.data.verts[p.verts[1] * 3], tile.data.verts[p.verts[1] * 3 + 1],
                     tile.data.verts[p.verts[1] * 3 + 2]
                 );
@@ -353,11 +352,11 @@ public class RecastDebugDraw : DebugDraw
                     }
                 }
 
-                var v0 = new Vector3(
+                var v0 = new RcVec3f(
                     tile.data.verts[p.verts[j] * 3], tile.data.verts[p.verts[j] * 3 + 1],
                     tile.data.verts[p.verts[j] * 3 + 2]
                 );
-                var v1 = new Vector3(
+                var v1 = new RcVec3f(
                     tile.data.verts[p.verts[(j + 1) % nj] * 3],
                     tile.data.verts[p.verts[(j + 1) % nj] * 3 + 1],
                     tile.data.verts[p.verts[(j + 1) % nj] * 3 + 2]
@@ -371,20 +370,20 @@ public class RecastDebugDraw : DebugDraw
                     for (int k = 0; k < pd.triCount; ++k)
                     {
                         int t = (pd.triBase + k) * 4;
-                        Vector3[] tv = new Vector3[3];
+                        RcVec3f[] tv = new RcVec3f[3];
                         for (int m = 0; m < 3; ++m)
                         {
                             int v = tile.data.detailTris[t + m];
                             if (v < p.vertCount)
                             {
-                                tv[m] = new Vector3(
+                                tv[m] = new RcVec3f(
                                     tile.data.verts[p.verts[v] * 3], tile.data.verts[p.verts[v] * 3 + 1],
                                     tile.data.verts[p.verts[v] * 3 + 2]
                                 );
                             }
                             else
                             {
-                                tv[m] = new Vector3(
+                                tv[m] = new RcVec3f(
                                     tile.data.detailVerts[(pd.vertBase + (v - p.vertCount)) * 3],
                                     tile.data.detailVerts[(pd.vertBase + (v - p.vertCount)) * 3 + 1],
                                     tile.data.detailVerts[(pd.vertBase + (v - p.vertCount)) * 3 + 2]
@@ -421,7 +420,7 @@ public class RecastDebugDraw : DebugDraw
         End();
     }
 
-    static float DistancePtLine2d(Vector3 pt, Vector3 p, Vector3 q)
+    static float DistancePtLine2d(RcVec3f pt, RcVec3f p, RcVec3f q)
     {
         float pqx = q.X - p.X;
         float pqz = q.Z - p.Z;
@@ -523,7 +522,7 @@ public class RecastDebugDraw : DebugDraw
     {
         float alpha = 1f;
 
-        Vector3 orig = cset.bmin;
+        RcVec3f orig = cset.bmin;
         float cs = cset.cs;
         float ch = cset.ch;
 
@@ -534,7 +533,7 @@ public class RecastDebugDraw : DebugDraw
         for (int i = 0; i < cset.conts.Count; ++i)
         {
             RcContour cont = cset.conts[i];
-            Vector3 pos = GetContourCenter(cont, orig, cs, ch);
+            RcVec3f pos = GetContourCenter(cont, orig, cs, ch);
             for (int j = 0; j < cont.nverts; ++j)
             {
                 int v = j * 4;
@@ -546,7 +545,7 @@ public class RecastDebugDraw : DebugDraw
                 RcContour cont2 = FindContourFromSet(cset, (short)cont.verts[v + 3]);
                 if (cont2 != null)
                 {
-                    Vector3 pos2 = GetContourCenter(cont2, orig, cs, ch);
+                    RcVec3f pos2 = GetContourCenter(cont2, orig, cs, ch);
                     AppendArc(pos.X, pos.Y, pos.Z, pos2.X, pos2.Y, pos2.Z, 0.25f, 0.6f, 0.6f, color);
                 }
             }
@@ -562,16 +561,16 @@ public class RecastDebugDraw : DebugDraw
         {
             RcContour cont = cset.conts[i];
             int col = DuDarkenCol(DuIntToCol(cont.reg, a));
-            Vector3 pos = GetContourCenter(cont, orig, cs, ch);
+            RcVec3f pos = GetContourCenter(cont, orig, cs, ch);
             Vertex(pos, col);
         }
 
         End();
     }
 
-    private Vector3 GetContourCenter(RcContour cont, Vector3 orig, float cs, float ch)
+    private RcVec3f GetContourCenter(RcContour cont, RcVec3f orig, float cs, float ch)
     {
-        Vector3 center = new Vector3();
+        RcVec3f center = new RcVec3f();
         center.X = 0;
         center.Y = 0;
         center.Z = 0;
@@ -613,7 +612,7 @@ public class RecastDebugDraw : DebugDraw
 
     public void DebugDrawRawContours(RcContourSet cset, float alpha)
     {
-        Vector3 orig = cset.bmin;
+        RcVec3f orig = cset.bmin;
         float cs = cset.cs;
         float ch = cset.ch;
 
@@ -689,7 +688,7 @@ public class RecastDebugDraw : DebugDraw
     public void DebugDrawContours(RcContourSet cset)
     {
         float alpha = 1f;
-        Vector3 orig = cset.bmin;
+        RcVec3f orig = cset.bmin;
         float cs = cset.cs;
         float ch = cset.ch;
 
@@ -771,7 +770,7 @@ public class RecastDebugDraw : DebugDraw
             return;
         }
 
-        Vector3 orig = hf.bmin;
+        RcVec3f orig = hf.bmin;
         float cs = hf.cs;
         float ch = hf.ch;
 
@@ -803,7 +802,7 @@ public class RecastDebugDraw : DebugDraw
 
     public void DebugDrawHeightfieldWalkable(RcHeightfield hf)
     {
-        Vector3 orig = hf.bmin;
+        RcVec3f orig = hf.bmin;
         float cs = hf.cs;
         float ch = hf.ch;
 
@@ -936,7 +935,7 @@ public class RecastDebugDraw : DebugDraw
         int nvp = mesh.nvp;
         float cs = mesh.cs;
         float ch = mesh.ch;
-        Vector3 orig = mesh.bmin;
+        RcVec3f orig = mesh.bmin;
 
         Begin(DebugDrawPrimitives.TRIS);
 
@@ -1201,9 +1200,7 @@ public class RecastDebugDraw : DebugDraw
             float off = 0.5f;
             Begin(DebugDrawPrimitives.POINTS, 4.0f);
 
-            foreach (List<DtNode> nodes in pool.GetNodeMap().Values)
-            {
-                foreach (DtNode node in nodes)
+            foreach (DtNode node in pool.AsEnumerable())
             {
                 if (node == null)
                 {
@@ -1212,14 +1209,11 @@ public class RecastDebugDraw : DebugDraw
 
                 Vertex(node.pos.X, node.pos.Y + off, node.pos.Z, DuRGBA(255, 192, 0, 255));
             }
-            }
 
             End();
 
             Begin(DebugDrawPrimitives.LINES, 2.0f);
-            foreach (List<DtNode> nodes in pool.GetNodeMap().Values)
-            {
-                foreach (DtNode node in nodes)
+            foreach (DtNode node in pool.AsEnumerable())
             {
                 if (node == null)
                 {
@@ -1240,7 +1234,6 @@ public class RecastDebugDraw : DebugDraw
                 Vertex(node.pos.X, node.pos.Y + off, node.pos.Z, DuRGBA(255, 192, 0, 128));
                 Vertex(parent.pos.X, parent.pos.Y + off, parent.pos.Z, DuRGBA(255, 192, 0, 128));
             }
-            }
 
             End();
         }
@@ -1349,11 +1342,11 @@ public class RecastDebugDraw : DebugDraw
                         continue;
 
                     // Create new links
-                    var va = new Vector3(
+                    var va = new RcVec3f(
                         tile.data.verts[poly.verts[j] * 3],
                         tile.data.verts[poly.verts[j] * 3 + 1], tile.data.verts[poly.verts[j] * 3 + 2]
                     );
-                    var vb = new Vector3(
+                    var vb = new RcVec3f(
                         tile.data.verts[poly.verts[(j + 1) % nv] * 3],
                         tile.data.verts[poly.verts[(j + 1) % nv] * 3 + 1],
                         tile.data.verts[poly.verts[(j + 1) % nv] * 3 + 2]

src/DotRecast.Recast.Demo/Messages/RaycastEvent.cs

@@ -1,10 +1,9 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Demo.Messages;
 
 public class RaycastEvent : IRecastDemoMessage
 {
-    public Vector3 Start { get; init; }
-    public Vector3 End { get; init; }
+    public RcVec3f Start { get; init; }
+    public RcVec3f End { get; init; }
 }

src/DotRecast.Recast.Demo/RecastDemo.cs

@@ -34,7 +34,6 @@ using Silk.NET.OpenGL.Extensions.ImGui;
 using Silk.NET.Windowing;
 using ImGuiNET;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Detour.Extras.Unity.Astar;
 using DotRecast.Detour.Io;
@@ -44,7 +43,6 @@ using DotRecast.Recast.Demo.Messages;
 using DotRecast.Recast.Toolset.Geom;
 using DotRecast.Recast.Demo.Tools;
 using DotRecast.Recast.Demo.UI;
-using DotRecast.Recast.Toolset;
 using MouseButton = Silk.NET.Input.MouseButton;
 using Window = Silk.NET.Windowing.Window;
 
@@ -81,7 +79,7 @@ public class RecastDemo : IRecastDemoChannel
     private bool processHitTestShift;
     private int _modState;
 
-    private Vector2 mousePos = new Vector2();
+    private RcVec2f mousePos = new RcVec2f();
 
     private bool _mouseOverMenu;
     private bool pan;
@@ -89,12 +87,12 @@ public class RecastDemo : IRecastDemoChannel
     private bool rotate;
     private bool movedDuringRotate;
     private float scrollZoom;
-    private Vector2 origMousePos = new Vector2();
-    private Vector2 origCameraEulers = new Vector2();
-    private Vector3 origCameraPos = new Vector3();
+    private RcVec2f origMousePos = new RcVec2f();
+    private RcVec2f origCameraEulers = new RcVec2f();
+    private RcVec3f origCameraPos = new RcVec3f();
 
-    private Vector2 cameraEulers = new Vector2(45, -45);
-    private Vector3 cameraPos = new Vector3(0, 0, 0);
+    private RcVec2f cameraEulers = new RcVec2f(45, -45);
+    private RcVec3f cameraPos = new RcVec3f(0, 0, 0);
 
 
     private float[] projectionMatrix = new float[16];
@@ -110,9 +108,10 @@ public class RecastDemo : IRecastDemoChannel
 
     private int[] viewport;
     private bool markerPositionSet;
-    private Vector3 markerPosition = new Vector3();
+    private RcVec3f markerPosition = new RcVec3f();
 
-    private RcToolsetView toolset;
+    private RcMenuView _menuView;
+    private RcToolsetView _toolsetView;
     private RcSettingsView settingsView;
     private RcLogView logView;
 
@@ -320,7 +319,7 @@ public class RecastDemo : IRecastDemoChannel
             if (null != mesh)
             {
                 _sample.Update(_sample.GetInputGeom(), ImmutableArray<RcBuilderResult>.Empty, mesh);
-                toolset.SetEnabled(true);
+                _toolsetView.SetEnabled(true);
             }
         }
         catch (Exception e)
@@ -381,10 +380,11 @@ public class RecastDemo : IRecastDemoChannel
         DemoInputGeomProvider geom = LoadInputMesh("nav_test.obj");
         _sample = new DemoSample(geom, ImmutableArray<RcBuilderResult>.Empty, null);
         
+        _menuView = new RcMenuView();
         settingsView = new RcSettingsView(this);
         settingsView.SetSample(_sample);
 
-        toolset = new RcToolsetView(
+        _toolsetView = new RcToolsetView(
             new TestNavmeshSampleTool(),
             new TileSampleTool(),
             new ObstacleSampleTool(),
@@ -395,10 +395,10 @@ public class RecastDemo : IRecastDemoChannel
             new JumpLinkBuilderSampleTool(),
             new DynamicUpdateSampleTool()
         );
-        toolset.SetEnabled(true);
+        _toolsetView.SetEnabled(true);
         logView = new RcLogView();
 
-        _canvas = new RcCanvas(window, settingsView, toolset, logView);
+        _canvas = new RcCanvas(window, _menuView, settingsView, _toolsetView, logView);
 
         var vendor = _gl.GetStringS(GLEnum.Vendor);
         var version = _gl.GetStringS(GLEnum.Version);
@@ -460,8 +460,8 @@ public class RecastDemo : IRecastDemoChannel
         if (_sample.GetInputGeom() != null)
         {
             var settings = _sample.GetSettings();
-            Vector3 bmin = _sample.GetInputGeom().GetMeshBoundsMin();
-            Vector3 bmax = _sample.GetInputGeom().GetMeshBoundsMax();
+            RcVec3f bmin = _sample.GetInputGeom().GetMeshBoundsMin();
+            RcVec3f bmax = _sample.GetInputGeom().GetMeshBoundsMax();
             RcCommons.CalcGridSize(bmin, bmax, settings.cellSize, out var gw, out var gh);
             settingsView.SetVoxels(gw, gh);
             settingsView.SetTiles(tileNavMeshBuilder.GetTiles(_sample.GetInputGeom(), settings.cellSize, settings.tileSize));
@@ -505,7 +505,7 @@ public class RecastDemo : IRecastDemoChannel
             timeAcc -= DELTA_TIME;
             if (simIter < 5 && _sample != null)
             {
-                var tool = toolset.GetTool();
+                var tool = _toolsetView.GetTool();
                 if (null != tool)
                 {
                     tool.HandleUpdate(DELTA_TIME);
@@ -519,8 +519,8 @@ public class RecastDemo : IRecastDemoChannel
         {
             processHitTest = false;
 
-            Vector3 rayStart = new Vector3();
-            Vector3 rayEnd = new Vector3();
+            RcVec3f rayStart = new RcVec3f();
+            RcVec3f rayEnd = new RcVec3f();
 
             GLU.GlhUnProjectf(mousePos.X, viewport[3] - 1 - mousePos.Y, 0.0f, modelviewMatrix, projectionMatrix, viewport, ref rayStart);
             GLU.GlhUnProjectf(mousePos.X, viewport[3] - 1 - mousePos.Y, 1.0f, modelviewMatrix, projectionMatrix, viewport, ref rayEnd);
@@ -535,8 +535,8 @@ public class RecastDemo : IRecastDemoChannel
         if (_sample.IsChanged())
         {
             bool hasBound = false;
-            Vector3 bminN = Vector3.Zero;
-            Vector3 bmaxN = Vector3.Zero;
+            RcVec3f bminN = RcVec3f.Zero;
+            RcVec3f bmaxN = RcVec3f.Zero;
             if (_sample.GetInputGeom() != null)
             {
                 bminN = _sample.GetInputGeom().GetMeshBoundsMin();
@@ -556,17 +556,17 @@ public class RecastDemo : IRecastDemoChannel
                     {
                         if (!hasBound)
                         {
-                            bminN = new Vector3(float.PositiveInfinity, float.PositiveInfinity, float.PositiveInfinity);
-                            bmaxN = new Vector3(float.NegativeInfinity, float.NegativeInfinity, float.NegativeInfinity);
+                            bminN = new RcVec3f(float.PositiveInfinity, float.PositiveInfinity, float.PositiveInfinity);
+                            bmaxN = new RcVec3f(float.NegativeInfinity, float.NegativeInfinity, float.NegativeInfinity);
                         }
 
-                        bminN = new Vector3(
+                        bminN = new RcVec3f(
                             Math.Min(bminN.X, result.GetSolidHeightfield().bmin.X),
                             Math.Min(bminN.Y, result.GetSolidHeightfield().bmin.Y),
                             Math.Min(bminN.Z, result.GetSolidHeightfield().bmin.Z)
                         );
 
-                        bmaxN = new Vector3(
+                        bmaxN = new RcVec3f(
                             Math.Max(bmaxN.X, result.GetSolidHeightfield().bmax.X),
                             Math.Max(bmaxN.Y, result.GetSolidHeightfield().bmax.Y),
                             Math.Max(bmaxN.Z, result.GetSolidHeightfield().bmax.Z)
@@ -579,8 +579,8 @@ public class RecastDemo : IRecastDemoChannel
 
             if (hasBound)
             {
-                Vector3 bmin = bminN;
-                Vector3 bmax = bmaxN;
+                RcVec3f bmin = bminN;
+                RcVec3f bmax = bmaxN;
 
                 camr = (float)(Math.Sqrt(RcMath.Sqr(bmax.X - bmin.X) + RcMath.Sqr(bmax.Y - bmin.Y) + RcMath.Sqr(bmax.Z - bmin.Z)) / 2);
                 cameraPos.X = (bmax.X + bmin.X) / 2 + camr;
@@ -592,7 +592,7 @@ public class RecastDemo : IRecastDemoChannel
             }
 
             _sample.SetChanged(false);
-            toolset.SetSample(_sample);
+            _toolsetView.SetSample(_sample);
         }
 
         if (_messages.TryDequeue(out var msg))
@@ -621,7 +621,7 @@ public class RecastDemo : IRecastDemoChannel
         dd.Fog(camr * 0.1f, camr * 1.25f);
         renderer.Render(_sample, settingsView.GetDrawMode());
 
-        ISampleTool sampleTool = toolset.GetTool();
+        ISampleTool sampleTool = _toolsetView.GetTool();
         if (sampleTool != null)
         {
             sampleTool.HandleRender(renderer);
@@ -708,7 +708,7 @@ public class RecastDemo : IRecastDemoChannel
         _sample.SetChanged(false);
         settingsView.SetBuildTime((RcFrequency.Ticks - t) / TimeSpan.TicksPerMillisecond);
         //settingsUI.SetBuildTelemetry(buildResult.Item1.Select(x => x.GetTelemetry()).ToList());
-        toolset.SetSample(_sample);
+        _toolsetView.SetSample(_sample);
 
         Logger.Information($"build times");
         Logger.Information($"-----------------------------------------");
@@ -798,10 +798,10 @@ public class RecastDemo : IRecastDemoChannel
             hit = RcPolyMeshRaycast.Raycast(_sample.GetRecastResults(), rayStart, rayEnd, out hitTime);
         }
 
-        Vector3 rayDir = new Vector3(rayEnd.X - rayStart.X, rayEnd.Y - rayStart.Y, rayEnd.Z - rayStart.Z);
-        rayDir = Vector3.Normalize(rayDir);
+        RcVec3f rayDir = new RcVec3f(rayEnd.X - rayStart.X, rayEnd.Y - rayStart.Y, rayEnd.Z - rayStart.Z);
+        rayDir = RcVec3f.Normalize(rayDir);
 
-        ISampleTool raySampleTool = toolset.GetTool();
+        ISampleTool raySampleTool = _toolsetView.GetTool();
 
         if (raySampleTool != null)
         {
@@ -821,7 +821,7 @@ public class RecastDemo : IRecastDemoChannel
             }
             else
             {
-                Vector3 pos = new Vector3();
+                RcVec3f pos = new RcVec3f();
                 pos.X = rayStart.X + (rayEnd.X - rayStart.X) * hitTime;
                 pos.Y = rayStart.Y + (rayEnd.Y - rayStart.Y) * hitTime;
                 pos.Z = rayStart.Z + (rayEnd.Z - rayStart.Z) * hitTime;

src/DotRecast.Recast.Demo/Tools/ConvexVolumeSampleTool.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Toolset.Builder;
 using DotRecast.Recast.Demo.Draw;
 using DotRecast.Recast.Toolset;
@@ -156,20 +155,16 @@ public class ConvexVolumeSampleTool : ISampleTool
         // ..
     }
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         var geom = _sample.GetInputGeom();
         if (shift)
         {
-            _tool.RemoveByPos(geom, p);
+            _tool.TryRemove(geom, p, out var volume);
         }
         else
         {
-            if (_tool.PlottingShape(p, out var pts, out var hull))
-            {
-                var vol = RcConvexVolumeTool.CreateConvexVolume(pts, hull, _areaType, _boxDescent, _boxHeight, _polyOffset);
-                _tool.Add(geom, vol);
-            }
+            _tool.TryAdd(geom, p, _areaType, _boxDescent, _boxHeight, _polyOffset, out var volume);
         }
     }
 
@@ -179,7 +174,7 @@ public class ConvexVolumeSampleTool : ISampleTool
         // TODO Auto-generated method stub
     }
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/Tools/CrowdAgentProfilingSampleTool.cs

@@ -21,7 +21,6 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Detour.Crowd;
 using DotRecast.Recast.Toolset.Builder;
@@ -119,7 +118,11 @@ public class CrowdAgentProfilingSampleTool : ISampleTool
                 ImGui.Text($"{rtt.Key}: {rtt.Micros} us");
             }
 
-            ImGui.Text($"Update Time: {_tool.GetCrowdUpdateTime()} ms");
+            ImGui.Text($"Sampling Time: {_tool.GetCrowdUpdateSamplingTime()} ms");
+            ImGui.Text($"Current Update Time: {_tool.GetCrowdUpdateTime()} ms");
+            ImGui.Text($"Avg Update Time: {_tool.GetCrowdUpdateAvgTime()} ms");
+            ImGui.Text($"Max Update Time: {_tool.GetCrowdUpdateMaxTime()} ms");
+            ImGui.Text($"Min Update Time: {_tool.GetCrowdUpdateMinTime()} ms");
         }
     }
 
@@ -134,7 +137,7 @@ public class CrowdAgentProfilingSampleTool : ISampleTool
             foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
             {
                 float radius = ag.option.radius;
-                Vector3 pos = ag.npos;
+                RcVec3f pos = ag.npos;
                 dd.DebugDrawCircle(pos.X, pos.Y, pos.Z, radius, DuRGBA(0, 0, 0, 32), 2.0f);
             }
 
@@ -144,7 +147,7 @@ public class CrowdAgentProfilingSampleTool : ISampleTool
 
                 float height = ag.option.height;
                 float radius = ag.option.radius;
-                Vector3 pos = ag.npos;
+                RcVec3f pos = ag.npos;
 
                 int col = DuRGBA(220, 220, 220, 128);
                 if (crowAgentData.type == RcCrowdAgentType.TRAVELLER)
@@ -199,7 +202,7 @@ public class CrowdAgentProfilingSampleTool : ISampleTool
     }
 
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         //throw new NotImplementedException();
     }
@@ -210,7 +213,7 @@ public class CrowdAgentProfilingSampleTool : ISampleTool
         _tool.Update(dt);
     }
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
         //throw new NotImplementedException();
     }

src/DotRecast.Recast.Demo/Tools/CrowdSampleTool.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Detour.Crowd;
 
@@ -189,7 +188,7 @@ public class CrowdSampleTool : ISampleTool
             float gridy = -float.MaxValue;
             foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
             {
-                Vector3 pos = ag.corridor.GetPos();
+                RcVec3f pos = ag.corridor.GetPos();
                 gridy = Math.Max(gridy, pos.Y);
             }
 
@@ -221,10 +220,10 @@ public class CrowdSampleTool : ISampleTool
         foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
         {
             RcCrowdAgentTrail trail = agentTrails[ag.idx];
-            Vector3 pos = ag.npos;
+            RcVec3f pos = ag.npos;
 
             dd.Begin(LINES, 3.0f);
-            Vector3 prev = new Vector3();
+            RcVec3f prev = new RcVec3f();
             float preva = 1;
             prev = pos;
             for (int j = 0; j < RcCrowdAgentTrail.AGENT_MAX_TRAIL - 1; ++j)
@@ -248,7 +247,7 @@ public class CrowdSampleTool : ISampleTool
                 continue;
 
             float radius = ag.option.radius;
-            Vector3 pos = ag.npos;
+            RcVec3f pos = ag.npos;
 
             if (_showCorners)
             {
@@ -257,8 +256,8 @@ public class CrowdSampleTool : ISampleTool
                     dd.Begin(LINES, 2.0f);
                     for (int j = 0; j < ag.corners.Count; ++j)
                     {
-                        Vector3 va = j == 0 ? pos : ag.corners[j - 1].pos;
-                        Vector3 vb = ag.corners[j].pos;
+                        RcVec3f va = j == 0 ? pos : ag.corners[j - 1].pos;
+                        RcVec3f vb = ag.corners[j].pos;
                         dd.Vertex(va.X, va.Y + radius, va.Z, DuRGBA(128, 0, 0, 192));
                         dd.Vertex(vb.X, vb.Y + radius, vb.Z, DuRGBA(128, 0, 0, 192));
                     }
@@ -266,7 +265,7 @@ public class CrowdSampleTool : ISampleTool
                     if ((ag.corners[ag.corners.Count - 1].flags
                          & DtStraightPathFlags.DT_STRAIGHTPATH_OFFMESH_CONNECTION) != 0)
                     {
-                        Vector3 v = ag.corners[ag.corners.Count - 1].pos;
+                        RcVec3f v = ag.corners[ag.corners.Count - 1].pos;
                         dd.Vertex(v.X, v.Y, v.Z, DuRGBA(192, 0, 0, 192));
                         dd.Vertex(v.X, v.Y + radius * 2, v.Z, DuRGBA(192, 0, 0, 192));
                     }
@@ -300,7 +299,7 @@ public class CrowdSampleTool : ISampleTool
 
             if (_showCollisionSegments)
             {
-                Vector3 center = ag.boundary.GetCenter();
+                RcVec3f center = ag.boundary.GetCenter();
                 dd.DebugDrawCross(center.X, center.Y + radius, center.Z, 0.2f, DuRGBA(192, 0, 128, 255), 2.0f);
                 dd.DebugDrawCircle(center.X, center.Y + radius, center.Z, ag.option.collisionQueryRange, DuRGBA(192, 0, 128, 128), 2.0f);
 
@@ -308,9 +307,9 @@ public class CrowdSampleTool : ISampleTool
                 for (int j = 0; j < ag.boundary.GetSegmentCount(); ++j)
                 {
                     int col = DuRGBA(192, 0, 128, 192);
-                    Vector3[] s = ag.boundary.GetSegment(j);
-                    Vector3 s0 = s[0];
-                    Vector3 s3 = s[1];
+                    RcVec3f[] s = ag.boundary.GetSegment(j);
+                    RcVec3f s0 = s[0];
+                    RcVec3f s3 = s[1];
                     if (DtUtils.TriArea2D(pos, s0, s3) < 0.0f)
                         col = DuDarkenCol(col);
 
@@ -353,7 +352,7 @@ public class CrowdSampleTool : ISampleTool
         foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
         {
             float radius = ag.option.radius;
-            Vector3 pos = ag.npos;
+            RcVec3f pos = ag.npos;
 
             int col = DuRGBA(0, 0, 0, 32);
             if (agentDebug.agent == ag)
@@ -366,7 +365,7 @@ public class CrowdSampleTool : ISampleTool
         {
             float height = ag.option.height;
             float radius = ag.option.radius;
-            Vector3 pos = ag.npos;
+            RcVec3f pos = ag.npos;
 
             int col = DuRGBA(220, 220, 220, 128);
             if (ag.targetState == DtMoveRequestState.DT_CROWDAGENT_TARGET_REQUESTING
@@ -402,7 +401,7 @@ public class CrowdSampleTool : ISampleTool
                 dd.Begin(QUADS);
                 for (int j = 0; j < vod.GetSampleCount(); ++j)
                 {
-                    Vector3 p = vod.GetSampleVelocity(j);
+                    RcVec3f p = vod.GetSampleVelocity(j);
                     float sr = vod.GetSampleSize(j);
                     float pen = vod.GetSamplePenalty(j);
                     float pen2 = vod.GetSamplePreferredSidePenalty(j);
@@ -423,9 +422,9 @@ public class CrowdSampleTool : ISampleTool
         {
             float radius = ag.option.radius;
             float height = ag.option.height;
-            Vector3 pos = ag.npos;
-            Vector3 vel = ag.vel;
-            Vector3 dvel = ag.dvel;
+            RcVec3f pos = ag.npos;
+            RcVec3f vel = ag.vel;
+            RcVec3f dvel = ag.dvel;
 
             int col = DuRGBA(220, 220, 220, 192);
             if (ag.targetState == DtMoveRequestState.DT_CROWDAGENT_TARGET_REQUESTING
@@ -473,7 +472,7 @@ public class CrowdSampleTool : ISampleTool
         }
     }
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         var crowd = _tool.GetCrowd();
         if (crowd == null)
@@ -516,7 +515,7 @@ public class CrowdSampleTool : ISampleTool
             if (nav != null && navquery != null)
             {
                 IDtQueryFilter filter = new DtQueryDefaultFilter();
-                Vector3 halfExtents = crowd.GetQueryExtents();
+                RcVec3f halfExtents = crowd.GetQueryExtents();
                 navquery.FindNearestPoly(p, halfExtents, filter, out var refs, out var nearestPt, out var _);
                 if (refs != 0)
                 {
@@ -537,7 +536,7 @@ public class CrowdSampleTool : ISampleTool
     }
 
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/Tools/DynamicUpdateSampleTool.cs

@@ -24,7 +24,6 @@ using System.Threading.Tasks;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic;
 using DotRecast.Recast.Toolset;
 using DotRecast.Recast.Toolset.Tools;
@@ -82,10 +81,10 @@ public class DynamicUpdateSampleTool : ISampleTool
 
     private bool sposSet;
     private bool eposSet;
-    private Vector3 spos;
-    private Vector3 epos;
+    private RcVec3f spos;
+    private RcVec3f epos;
     private bool raycastHit;
-    private Vector3 raycastHitPos;
+    private RcVec3f raycastHitPos;
 
     public DynamicUpdateSampleTool()
     {
@@ -304,7 +303,7 @@ public class DynamicUpdateSampleTool : ISampleTool
             }
 
             dd.DepthMask(false);
-            if (raycastHitPos != Vector3.Zero)
+            if (raycastHitPos != RcVec3f.Zero)
             {
                 int spathCol = raycastHit ? DuRGBA(128, 32, 16, 220) : DuRGBA(64, 128, 240, 220);
                 dd.Begin(LINES, 2.0f);
@@ -317,7 +316,7 @@ public class DynamicUpdateSampleTool : ISampleTool
         }
     }
 
-    private void DrawAgent(RecastDebugDraw dd, Vector3 pos, int col)
+    private void DrawAgent(RecastDebugDraw dd, RcVec3f pos, int col)
     {
         var settings = _sample.GetSettings();
         float r = settings.agentRadius;
@@ -355,7 +354,7 @@ public class DynamicUpdateSampleTool : ISampleTool
     }
 
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         if (mode == RcDynamicUpdateToolMode.COLLIDERS)
         {
@@ -391,7 +390,7 @@ public class DynamicUpdateSampleTool : ISampleTool
     }
 
 
-    public void HandleClickRay(Vector3 start, Vector3 dir, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f dir, bool shift)
     {
         if (mode == RcDynamicUpdateToolMode.COLLIDERS)
         {

src/DotRecast.Recast.Demo/Tools/GizmoRenderer.cs

@@ -1,7 +1,6 @@
 using System;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Demo.Draw;
 using DotRecast.Recast.Toolset.Gizmos;
 
@@ -39,9 +38,9 @@ public static class GizmoRenderer
 
     public static int GetColorByNormal(float[] vertices, int v0, int v1, int v2)
     {
-        Vector3 e0 = new Vector3();
-        Vector3 e1 = new Vector3();
-        Vector3 normal = new Vector3();
+        RcVec3f e0 = new RcVec3f();
+        RcVec3f e1 = new RcVec3f();
+        RcVec3f normal = new RcVec3f();
         for (int j = 0; j < 3; ++j)
         {
             e0 = RcVecUtils.Subtract(vertices, v1, v0);
@@ -51,7 +50,7 @@ public static class GizmoRenderer
         normal.X = e0.Y * e1.Z - e0.Z * e1.Y;
         normal.Y = e0.Z * e1.X - e0.X * e1.Z;
         normal.Z = e0.X * e1.Y - e0.Y * e1.X;
-        normal = Vector3.Normalize(normal);
+        normal = RcVec3f.Normalize(normal);
         float c = Math.Clamp(0.57735026f * (normal.X + normal.Y + normal.Z), -1, 1);
         int col = DebugDraw.DuLerpCol(
             DebugDraw.DuRGBA(32, 32, 0, 160),
@@ -63,15 +62,15 @@ public static class GizmoRenderer
 
     public static void RenderBox(RecastDebugDraw debugDraw, RcBoxGizmo box)
     {
-        var trX = new Vector3(box.halfEdges[0].X, box.halfEdges[1].X, box.halfEdges[2].X);
-        var trY = new Vector3(box.halfEdges[0].Y, box.halfEdges[1].Y, box.halfEdges[2].Y);
-        var trZ = new Vector3(box.halfEdges[0].Z, box.halfEdges[1].Z, box.halfEdges[2].Z);
+        var trX = new RcVec3f(box.halfEdges[0].X, box.halfEdges[1].X, box.halfEdges[2].X);
+        var trY = new RcVec3f(box.halfEdges[0].Y, box.halfEdges[1].Y, box.halfEdges[2].Y);
+        var trZ = new RcVec3f(box.halfEdges[0].Z, box.halfEdges[1].Z, box.halfEdges[2].Z);
         float[] vertices = new float[8 * 3];
         for (int i = 0; i < 8; i++)
         {
-            vertices[i * 3 + 0] = Vector3.Dot(RcBoxGizmo.VERTS[i], trX) + box.center.X;
-            vertices[i * 3 + 1] = Vector3.Dot(RcBoxGizmo.VERTS[i], trY) + box.center.Y;
-            vertices[i * 3 + 2] = Vector3.Dot(RcBoxGizmo.VERTS[i], trZ) + box.center.Z;
+            vertices[i * 3 + 0] = RcVec3f.Dot(RcBoxGizmo.VERTS[i], trX) + box.center.X;
+            vertices[i * 3 + 1] = RcVec3f.Dot(RcBoxGizmo.VERTS[i], trY) + box.center.Y;
+            vertices[i * 3 + 2] = RcVec3f.Dot(RcBoxGizmo.VERTS[i], trZ) + box.center.Z;
         }
 
         debugDraw.Begin(DebugDrawPrimitives.TRIS);

src/DotRecast.Recast.Demo/Tools/ISampleTool.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Demo.Draw;
 using DotRecast.Recast.Toolset;
 
@@ -32,8 +31,8 @@ public interface ISampleTool
 
     IRcToolable GetTool();
     void Layout();
-    void HandleClick(Vector3 s, Vector3 p, bool shift);
+    void HandleClick(RcVec3f s, RcVec3f p, bool shift);
     void HandleRender(NavMeshRenderer renderer);
     void HandleUpdate(float dt);
-    void HandleClickRay(Vector3 start, Vector3 direction, bool shift);
+    void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift);
 }

src/DotRecast.Recast.Demo/Tools/JumpLinkBuilderSampleTool.cs

@@ -17,7 +17,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Extras.Jumplink;
 using DotRecast.Recast.Demo.Draw;
 using DotRecast.Recast.Toolset;
@@ -303,7 +302,7 @@ public class JumpLinkBuilderSampleTool : ISampleTool
                     {
                         GroundSample s = link.start.gsamples[i];
                         float u = i / (float)(link.start.gsamples.Length - 1);
-                        Vector3 spt = Vector3.Lerp(link.start.p, link.start.q, u);
+                        RcVec3f spt = RcVec3f.Lerp(link.start.p, link.start.q, u);
                         int col = DuRGBA(48, 16, 16, 255); // DuRGBA(255,(s->flags & 4)?255:0,0,255);
                         float off = 0.1f;
                         if (!s.validHeight)
@@ -323,7 +322,7 @@ public class JumpLinkBuilderSampleTool : ISampleTool
                     {
                         GroundSample s = link.start.gsamples[i];
                         float u = i / (float)(link.start.gsamples.Length - 1);
-                        Vector3 spt = Vector3.Lerp(link.start.p, link.start.q, u);
+                        RcVec3f spt = RcVec3f.Lerp(link.start.p, link.start.q, u);
                         int col = DuRGBA(255, 255, 255, 255);
                         float off = 0;
                         if (s.validHeight)
@@ -343,7 +342,7 @@ public class JumpLinkBuilderSampleTool : ISampleTool
                         {
                             GroundSample s = end.gsamples[i];
                             float u = i / (float)(end.gsamples.Length - 1);
-                            Vector3 spt = Vector3.Lerp(end.p, end.q, u);
+                            RcVec3f spt = RcVec3f.Lerp(end.p, end.q, u);
                             int col = DuRGBA(48, 16, 16, 255); // DuRGBA(255,(s->flags & 4)?255:0,0,255);
                             float off = 0.1f;
                             if (!s.validHeight)
@@ -362,7 +361,7 @@ public class JumpLinkBuilderSampleTool : ISampleTool
                         {
                             GroundSample s = end.gsamples[i];
                             float u = i / (float)(end.gsamples.Length - 1);
-                            Vector3 spt = Vector3.Lerp(end.p, end.q, u);
+                            RcVec3f spt = RcVec3f.Lerp(end.p, end.q, u);
                             int col = DuRGBA(255, 255, 255, 255);
                             float off = 0;
                             if (s.validHeight)
@@ -400,12 +399,12 @@ public class JumpLinkBuilderSampleTool : ISampleTool
     }
 
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
     }
 
 
-    private void DrawTrajectory(RecastDebugDraw dd, JumpLink link, Vector3 pa, Vector3 pb, Trajectory tra, int cola)
+    private void DrawTrajectory(RecastDebugDraw dd, JumpLink link, RcVec3f pa, RcVec3f pb, Trajectory tra, int cola)
     {
     }
 
@@ -414,7 +413,7 @@ public class JumpLinkBuilderSampleTool : ISampleTool
     }
 
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/Tools/ObstacleSampleTool.cs

@@ -1,6 +1,5 @@
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.TileCache;
 using DotRecast.Detour.TileCache.Io.Compress;
 using DotRecast.Recast.Demo.Draw;
@@ -67,8 +66,8 @@ public class ObstacleSampleTool : ISampleTool
             if (ob.state == DtObstacleState.DT_OBSTACLE_EMPTY)
                 continue;
 
-            Vector3 bmin = Vector3.Zero;
-            Vector3 bmax = Vector3.Zero;
+            RcVec3f bmin = RcVec3f.Zero;
+            RcVec3f bmax = RcVec3f.Zero;
             tc.GetObstacleBounds(ob, ref bmin, ref bmax);
 
             int col = 0;
@@ -99,7 +98,7 @@ public class ObstacleSampleTool : ISampleTool
     }
 
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         if (shift)
         {
@@ -119,7 +118,7 @@ public class ObstacleSampleTool : ISampleTool
             tc.Update();
     }
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/Tools/OffMeshConnectionSampleTool.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Demo.Draw;
 using DotRecast.Recast.Toolset;
 using DotRecast.Recast.Toolset.Geom;
@@ -41,7 +40,7 @@ public class OffMeshConnectionSampleTool : ISampleTool
 
     private int _bidir;
     private bool _hasStartPt;
-    private Vector3 _startPt;
+    private RcVec3f _startPt;
 
     public OffMeshConnectionSampleTool()
     {
@@ -89,7 +88,7 @@ public class OffMeshConnectionSampleTool : ISampleTool
         // ..
     }
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         DemoInputGeomProvider geom = _sample.GetInputGeom();
         if (geom == null)
@@ -125,7 +124,7 @@ public class OffMeshConnectionSampleTool : ISampleTool
         // TODO Auto-generated method stub
     }
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/Tools/TestNavmeshSampleTool.cs

@@ -2,7 +2,6 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Recast.Toolset.Builder;
 using DotRecast.Recast.Demo.Draw;
@@ -43,18 +42,18 @@ public class TestNavmeshSampleTool : ISampleTool
     // 
     private bool m_sposSet;
     private long m_startRef;
-    private Vector3 m_spos;
+    private RcVec3f m_spos;
 
     private bool m_eposSet;
     private long m_endRef;
-    private Vector3 m_epos;
+    private RcVec3f m_epos;
 
     private readonly DtQueryDefaultFilter m_filter;
-    private readonly Vector3 m_polyPickExt = new Vector3(2, 4, 2);
+    private readonly RcVec3f m_polyPickExt = new RcVec3f(2, 4, 2);
 
     // for hit
-    private Vector3 m_hitPos;
-    private Vector3 m_hitNormal;
+    private RcVec3f m_hitPos;
+    private RcVec3f m_hitNormal;
     private bool m_hitResult;
 
     private float m_distanceToWall;
@@ -62,12 +61,12 @@ public class TestNavmeshSampleTool : ISampleTool
     private List<long> m_polys;
     private List<long> m_parent;
     private float m_neighbourhoodRadius;
-    private Vector3[] m_queryPoly = new Vector3[4];
-    private List<Vector3> m_smoothPath;
+    private RcVec3f[] m_queryPoly = new RcVec3f[4];
+    private List<RcVec3f> m_smoothPath;
     private DtStatus m_pathFindStatus = DtStatus.DT_FAILURE;
 
     // for mode RANDOM_POINTS_IN_CIRCLE
-    private List<Vector3> _randomPoints = new();
+    private List<RcVec3f> _randomPoints = new();
 
     public TestNavmeshSampleTool()
     {
@@ -384,12 +383,12 @@ public class TestNavmeshSampleTool : ISampleTool
         {
             dd.DebugDrawNavMeshPoly(m_navMesh, m_startRef, startCol);
             dd.DepthMask(false);
-            if (m_spos != Vector3.Zero)
+            if (m_spos != RcVec3f.Zero)
             {
                 dd.DebugDrawCircle(m_spos.X, m_spos.Y + agentHeight / 2, m_spos.Z, m_distanceToWall, DuRGBA(64, 16, 0, 220), 2.0f);
             }
 
-            if (m_hitPos != Vector3.Zero)
+            if (m_hitPos != RcVec3f.Zero)
             {
                 dd.Begin(LINES, 3.0f);
                 dd.Vertex(m_hitPos.X, m_hitPos.Y + 0.02f, m_hitPos.Z, DuRGBA(0, 0, 0, 192));
@@ -410,8 +409,8 @@ public class TestNavmeshSampleTool : ISampleTool
                     if (m_parent[i] != 0)
                     {
                         dd.DepthMask(false);
-                        Vector3 p0 = m_navMesh.GetPolyCenter(m_parent[i]);
-                        Vector3 p1 = m_navMesh.GetPolyCenter(m_polys[i]);
+                        RcVec3f p0 = m_navMesh.GetPolyCenter(m_parent[i]);
+                        RcVec3f p1 = m_navMesh.GetPolyCenter(m_polys[i]);
                         dd.DebugDrawArc(p0.X, p0.Y, p0.Z, p1.X, p1.Y, p1.Z, 0.25f, 0.0f, 0.4f, DuRGBA(0, 0, 0, 128), 2.0f);
                         dd.DepthMask(true);
                     }
@@ -441,8 +440,8 @@ public class TestNavmeshSampleTool : ISampleTool
                     if (m_parent[i] != 0)
                     {
                         dd.DepthMask(false);
-                        Vector3 p0 = m_navMesh.GetPolyCenter(m_parent[i]);
-                        Vector3 p1 = m_navMesh.GetPolyCenter(m_polys[i]);
+                        RcVec3f p0 = m_navMesh.GetPolyCenter(m_parent[i]);
+                        RcVec3f p1 = m_navMesh.GetPolyCenter(m_polys[i]);
                         dd.DebugDrawArc(p0.X, p0.Y, p0.Z, p1.X, p1.Y, p1.Z, 0.25f, 0.0f, 0.4f, DuRGBA(0, 0, 0, 128), 2.0f);
                         dd.DepthMask(true);
                     }
@@ -480,8 +479,8 @@ public class TestNavmeshSampleTool : ISampleTool
                     if (m_parent[i] != 0)
                     {
                         dd.DepthMask(false);
-                        Vector3 p0 = m_navMesh.GetPolyCenter(m_parent[i]);
-                        Vector3 p1 = m_navMesh.GetPolyCenter(m_polys[i]);
+                        RcVec3f p0 = m_navMesh.GetPolyCenter(m_parent[i]);
+                        RcVec3f p1 = m_navMesh.GetPolyCenter(m_polys[i]);
                         dd.DebugDrawArc(p0.X, p0.Y, p0.Z, p1.X, p1.Y, p1.Z, 0.25f, 0.0f, 0.4f, DuRGBA(0, 0, 0, 128), 2.0f);
                         dd.DepthMask(true);
                     }
@@ -508,11 +507,11 @@ public class TestNavmeshSampleTool : ISampleTool
                                     continue;
                                 }
 
-                                Vector3 delta = Vector3.Subtract(s3, s.vmin);
-                                Vector3 p0 = RcVecUtils.Mad(s.vmin, delta, 0.5f);
-                                Vector3 norm = new Vector3(delta.Z, 0, -delta.X);
-                                norm = Vector3.Normalize(norm);
-                                Vector3 p1 = RcVecUtils.Mad(p0, norm, agentRadius * 0.5f);
+                                RcVec3f delta = RcVec3f.Subtract(s3, s.vmin);
+                                RcVec3f p0 = RcVecUtils.Mad(s.vmin, delta, 0.5f);
+                                RcVec3f norm = new RcVec3f(delta.Z, 0, -delta.X);
+                                norm = RcVec3f.Normalize(norm);
+                                RcVec3f p1 = RcVecUtils.Mad(p0, norm, agentRadius * 0.5f);
                                 // Skip backfacing segments.
                                 if (segmentRefs[j] != 0)
                                 {
@@ -556,7 +555,7 @@ public class TestNavmeshSampleTool : ISampleTool
             dd.DepthMask(false);
             dd.Begin(POINTS, 4.0f);
             int col = DuRGBA(64, 16, 0, 220);
-            foreach (Vector3 point in _randomPoints)
+            foreach (RcVec3f point in _randomPoints)
             {
                 dd.Vertex(point.X, point.Y + 0.1f, point.Z, col);
             }
@@ -576,7 +575,7 @@ public class TestNavmeshSampleTool : ISampleTool
         }
     }
 
-    private void DrawAgent(RecastDebugDraw dd, Vector3 pos, int col)
+    private void DrawAgent(RecastDebugDraw dd, RcVec3f pos, int col)
     {
         var settings = _sample.GetSettings();
         float r = settings.agentRadius;
@@ -614,7 +613,7 @@ public class TestNavmeshSampleTool : ISampleTool
     }
 
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         if (shift)
         {
@@ -718,7 +717,7 @@ public class TestNavmeshSampleTool : ISampleTool
         }
     }
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/Tools/TileSampleTool.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Demo.Draw;
 using DotRecast.Recast.Toolset;
 using DotRecast.Recast.Toolset.Builder;
@@ -19,7 +18,7 @@ public class TileSampleTool : ISampleTool
     private readonly RcTileTool _tool;
 
     private bool _hitPosSet;
-    private Vector3 _hitPos;
+    private RcVec3f _hitPos;
 
     public TileSampleTool()
     {
@@ -63,8 +62,8 @@ public class TileSampleTool : ISampleTool
             int tx = (int)((_hitPos.X - bmin.X) / ts);
             int ty = (int)((_hitPos.Z - bmin.Z) / ts);
 
-            Vector3 lastBuiltTileBmin = Vector3.Zero;
-            Vector3 lastBuiltTileBmax = Vector3.Zero;
+            RcVec3f lastBuiltTileBmin = RcVec3f.Zero;
+            RcVec3f lastBuiltTileBmax = RcVec3f.Zero;
 
             lastBuiltTileBmin.X = bmin.X + tx * ts;
             lastBuiltTileBmin.Y = bmin.Y;
@@ -99,7 +98,7 @@ public class TileSampleTool : ISampleTool
     }
 
 
-    public void HandleClick(Vector3 s, Vector3 p, bool shift)
+    public void HandleClick(RcVec3f s, RcVec3f p, bool shift)
     {
         _hitPosSet = true;
         _hitPos = p;
@@ -131,7 +130,7 @@ public class TileSampleTool : ISampleTool
     {
     }
 
-    public void HandleClickRay(Vector3 start, Vector3 direction, bool shift)
+    public void HandleClickRay(RcVec3f start, RcVec3f direction, bool shift)
     {
     }
 }

src/DotRecast.Recast.Demo/UI/RcMenuView.cs

@@ -0,0 +1,59 @@
+using DotRecast.Core;
+using ImGuiNET;
+
+namespace DotRecast.Recast.Demo.UI;
+
+public class RcMenuView : IRcView
+{
+    private RcCanvas _canvas;
+
+    public void Bind(RcCanvas canvas)
+    {
+        _canvas = canvas;
+    }
+
+    public bool IsHovered()
+    {
+        //throw new System.NotImplementedException();
+        return false;
+    }
+
+    public void Update(double dt)
+    {
+        //throw new System.NotImplementedException();
+    }
+
+    public void Draw(double dt)
+    {
+        if (ImGui.BeginMainMenuBar())
+        {
+            if (ImGui.BeginMenu("Help"))
+            {
+                if (ImGui.MenuItem("Repository"))
+                {
+                    RcProcess.OpenUrl("https://github.com/ikpil/DotRecast");
+                }
+                
+                if (ImGui.MenuItem("Nuget"))
+                {
+                    RcProcess.OpenUrl("https://www.nuget.org/packages/DotRecast.Core/");
+                }
+
+                ImGui.Separator();
+                if (ImGui.MenuItem("Issue Tracker"))
+                {
+                    RcProcess.OpenUrl("https://github.com/ikpil/DotRecast/issues");
+                }
+
+                if (ImGui.MenuItem("Release Notes"))
+                {
+                    RcProcess.OpenUrl("https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md");
+                }
+
+                ImGui.EndMenu();
+            }
+
+            ImGui.EndMainMenuBar();
+        }
+    }
+}

src/DotRecast.Recast.Toolset/DotRecast.Recast.Toolset.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Recast.Toolset</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Recast.Toolset/Geom/DemoInputGeomProvider.cs

@@ -23,7 +23,6 @@ using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 
 namespace DotRecast.Recast.Toolset.Geom
@@ -33,8 +32,8 @@ namespace DotRecast.Recast.Toolset.Geom
         public readonly float[] vertices;
         public readonly int[] faces;
         public readonly float[] normals;
-        private readonly Vector3 bmin;
-        private readonly Vector3 bmax;
+        private readonly RcVec3f bmin;
+        private readonly RcVec3f bmax;
 
         private readonly List<RcConvexVolume> _convexVolumes = new List<RcConvexVolume>();
         private readonly List<RcOffMeshConnection> _offMeshConnections = new List<RcOffMeshConnection>();
@@ -74,12 +73,12 @@ namespace DotRecast.Recast.Toolset.Geom
             return _mesh;
         }
 
-        public Vector3 GetMeshBoundsMin()
+        public RcVec3f GetMeshBoundsMin()
         {
             return bmin;
         }
 
-        public Vector3 GetMeshBoundsMax()
+        public RcVec3f GetMeshBoundsMax()
         {
             return bmax;
         }
@@ -123,7 +122,7 @@ namespace DotRecast.Recast.Toolset.Geom
             return _offMeshConnections;
         }
 
-        public void AddOffMeshConnection(Vector3 start, Vector3 end, float radius, bool bidir, int area, int flags)
+        public void AddOffMeshConnection(RcVec3f start, RcVec3f end, float radius, bool bidir, int area, int flags)
         {
             _offMeshConnections.Add(new RcOffMeshConnection(start, end, radius, bidir, area, flags));
         }
@@ -134,7 +133,7 @@ namespace DotRecast.Recast.Toolset.Geom
             _offMeshConnections.RemoveAll(filter); // TODO : 확인 필요
         }
 
-        public bool RaycastMesh(Vector3 src, Vector3 dst, out float tmin)
+        public bool RaycastMesh(RcVec3f src, RcVec3f dst, out float tmin)
         {
             tmin = 1.0f;
 
@@ -144,8 +143,8 @@ namespace DotRecast.Recast.Toolset.Geom
                 return false;
             }
 
-            var p = new Vector2();
-            var q = new Vector2();
+            var p = new RcVec2f();
+            var q = new RcVec2f();
             p.X = src.X + (dst.X - src.X) * btmin;
             p.Y = src.Z + (dst.Z - src.Z) * btmin;
             q.X = src.X + (dst.X - src.X) * btmax;
@@ -164,17 +163,17 @@ namespace DotRecast.Recast.Toolset.Geom
                 int[] tris = chunk.tris;
                 for (int j = 0; j < chunk.tris.Length; j += 3)
                 {
-                    Vector3 v1 = new Vector3(
+                    RcVec3f v1 = new RcVec3f(
                         vertices[tris[j] * 3],
                         vertices[tris[j] * 3 + 1],
                         vertices[tris[j] * 3 + 2]
                     );
-                    Vector3 v2 = new Vector3(
+                    RcVec3f v2 = new RcVec3f(
                         vertices[tris[j + 1] * 3],
                         vertices[tris[j + 1] * 3 + 1],
                         vertices[tris[j + 1] * 3 + 2]
                     );
-                    Vector3 v3 = new Vector3(
+                    RcVec3f v3 = new RcVec3f(
                         vertices[tris[j + 2] * 3],
                         vertices[tris[j + 2] * 3 + 1],
                         vertices[tris[j + 2] * 3 + 2]

src/DotRecast.Recast.Toolset/Gizmos/RcBoxGizmo.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic.Colliders;
 
 namespace DotRecast.Recast.Toolset.Gizmos
@@ -12,28 +11,28 @@ namespace DotRecast.Recast.Toolset.Gizmos
             2, 6, 7, 2, 7, 3, 4, 0, 3, 4, 3, 7
         };
 
-        public static readonly Vector3[] VERTS =
+        public static readonly RcVec3f[] VERTS =
         {
-            new Vector3(-1f, -1f, -1f),
-            new Vector3(1f, -1f, -1f),
-            new Vector3(1f, -1f, 1f),
-            new Vector3(-1f, -1f, 1f),
-            new Vector3(-1f, 1f, -1f),
-            new Vector3(1f, 1f, -1f),
-            new Vector3(1f, 1f, 1f),
-            new Vector3(-1f, 1f, 1f),
+            new RcVec3f(-1f, -1f, -1f),
+            new RcVec3f(1f, -1f, -1f),
+            new RcVec3f(1f, -1f, 1f),
+            new RcVec3f(-1f, -1f, 1f),
+            new RcVec3f(-1f, 1f, -1f),
+            new RcVec3f(1f, 1f, -1f),
+            new RcVec3f(1f, 1f, 1f),
+            new RcVec3f(-1f, 1f, 1f),
         };
 
         public readonly float[] vertices = new float[8 * 3];
-        public readonly Vector3 center;
-        public readonly Vector3[] halfEdges;
+        public readonly RcVec3f center;
+        public readonly RcVec3f[] halfEdges;
 
-        public RcBoxGizmo(Vector3 center, Vector3 extent, Vector3 forward, Vector3 up) :
+        public RcBoxGizmo(RcVec3f center, RcVec3f extent, RcVec3f forward, RcVec3f up) :
             this(center, DtBoxCollider.GetHalfEdges(up, forward, extent))
         {
         }
 
-        public RcBoxGizmo(Vector3 center, Vector3[] halfEdges)
+        public RcBoxGizmo(RcVec3f center, RcVec3f[] halfEdges)
         {
             this.center = center;
             this.halfEdges = halfEdges;

src/DotRecast.Recast.Toolset/Gizmos/RcCapsuleGizmo.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using static DotRecast.Recast.Toolset.Gizmos.RcGizmoHelper;
 
 namespace DotRecast.Recast.Toolset.Gizmos
@@ -12,30 +11,30 @@ namespace DotRecast.Recast.Toolset.Gizmos
         public readonly float[] center;
         public readonly float[] gradient;
 
-        public RcCapsuleGizmo(Vector3 start, Vector3 end, float radius)
+        public RcCapsuleGizmo(RcVec3f start, RcVec3f end, float radius)
         {
             center = new float[]
             {
                 0.5f * (start.X + end.X), 0.5f * (start.Y + end.Y),
                 0.5f * (start.Z + end.Z)
             };
-            Vector3 axis = new Vector3(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
-            Vector3[] normals = new Vector3[3];
-            normals[1] = new Vector3(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
-            normals[1] = Vector3.Normalize(normals[1]);
+            RcVec3f axis = new RcVec3f(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
+            RcVec3f[] normals = new RcVec3f[3];
+            normals[1] = new RcVec3f(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
+            normals[1] = RcVec3f.Normalize(normals[1]);
             normals[0] = GetSideVector(axis);
-            normals[2] = Vector3.Zero;
-            normals[2] = Vector3.Cross(normals[0], normals[1]);
-            normals[2] = Vector3.Normalize(normals[2]);
+            normals[2] = RcVec3f.Zero;
+            normals[2] = RcVec3f.Cross(normals[0], normals[1]);
+            normals[2] = RcVec3f.Normalize(normals[2]);
             triangles = GenerateSphericalTriangles();
-            var trX = new Vector3(normals[0].X, normals[1].X, normals[2].X);
-            var trY = new Vector3(normals[0].Y, normals[1].Y, normals[2].Y);
-            var trZ = new Vector3(normals[0].Z, normals[1].Z, normals[2].Z);
+            var trX = new RcVec3f(normals[0].X, normals[1].X, normals[2].X);
+            var trY = new RcVec3f(normals[0].Y, normals[1].Y, normals[2].Y);
+            var trZ = new RcVec3f(normals[0].Z, normals[1].Z, normals[2].Z);
             float[] spVertices = GenerateSphericalVertices();
             float halfLength = 0.5f * axis.Length();
             vertices = new float[spVertices.Length];
             gradient = new float[spVertices.Length / 3];
-            Vector3 v = new Vector3();
+            RcVec3f v = new RcVec3f();
             for (int i = 0; i < spVertices.Length; i += 3)
             {
                 float offset = (i >= spVertices.Length / 2) ? -halfLength : halfLength;
@@ -48,22 +47,22 @@ namespace DotRecast.Recast.Toolset.Gizmos
                 v.X = vertices[i] - center[0];
                 v.Y = vertices[i + 1] - center[1];
                 v.Z = vertices[i + 2] - center[2];
-                v = Vector3.Normalize(v);
+                v = RcVec3f.Normalize(v);
                 gradient[i / 3] = Math.Clamp(0.57735026f * (v.X + v.Y + v.Z), -1, 1);
             }
         }
 
-        private Vector3 GetSideVector(Vector3 axis)
+        private RcVec3f GetSideVector(RcVec3f axis)
         {
-            var side = new Vector3(1, 0, 0);
+            var side = new RcVec3f(1, 0, 0);
             if (axis.X > 0.8)
             {
-                side = new Vector3(0, 0, 1);
+                side = new RcVec3f(0, 0, 1);
             }
 
-            var forward = Vector3.Cross(side, axis);
-            side = Vector3.Cross(axis, forward);
-            side = Vector3.Normalize(side);
+            var forward = RcVec3f.Cross(side, axis);
+            side = RcVec3f.Cross(axis, forward);
+            side = RcVec3f.Normalize(side);
             return side;
         }
     }

src/DotRecast.Recast.Toolset/Gizmos/RcCylinderGizmo.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using static DotRecast.Recast.Toolset.Gizmos.RcGizmoHelper;
 
 
@@ -10,31 +9,31 @@ namespace DotRecast.Recast.Toolset.Gizmos
     {
         public readonly float[] vertices;
         public readonly int[] triangles;
-        public readonly Vector3 center;
+        public readonly RcVec3f center;
         public readonly float[] gradient;
 
-        public RcCylinderGizmo(Vector3 start, Vector3 end, float radius)
+        public RcCylinderGizmo(RcVec3f start, RcVec3f end, float radius)
         {
-            center = new Vector3(
+            center = new RcVec3f(
                 0.5f * (start.X + end.X), 0.5f * (start.Y + end.Y),
                 0.5f * (start.Z + end.Z)
             );
-            Vector3 axis = new Vector3(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
-            Vector3[] normals = new Vector3[3];
-            normals[1] = new Vector3(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
-            normals[1] = Vector3.Normalize(normals[1]);
+            RcVec3f axis = new RcVec3f(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
+            RcVec3f[] normals = new RcVec3f[3];
+            normals[1] = new RcVec3f(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
+            normals[1] = RcVec3f.Normalize(normals[1]);
             normals[0] = GetSideVector(axis);
-            normals[2] = Vector3.Zero;
-            normals[2] = Vector3.Cross(normals[0], normals[1]);
-            normals[2] = Vector3.Normalize(normals[2]);
+            normals[2] = RcVec3f.Zero;
+            normals[2] = RcVec3f.Cross(normals[0], normals[1]);
+            normals[2] = RcVec3f.Normalize(normals[2]);
             triangles = GenerateCylindricalTriangles();
-            Vector3 trX = new Vector3(normals[0].X, normals[1].X, normals[2].X);
-            Vector3 trY = new Vector3(normals[0].Y, normals[1].Y, normals[2].Y);
-            Vector3 trZ = new Vector3(normals[0].Z, normals[1].Z, normals[2].Z);
+            RcVec3f trX = new RcVec3f(normals[0].X, normals[1].X, normals[2].X);
+            RcVec3f trY = new RcVec3f(normals[0].Y, normals[1].Y, normals[2].Y);
+            RcVec3f trZ = new RcVec3f(normals[0].Z, normals[1].Z, normals[2].Z);
             vertices = GenerateCylindricalVertices();
             float halfLength = 0.5f * axis.Length();
             gradient = new float[vertices.Length / 3];
-            Vector3 v = new Vector3();
+            RcVec3f v = new RcVec3f();
             for (int i = 0; i < vertices.Length; i += 3)
             {
                 float offset = (i >= vertices.Length / 2) ? -halfLength : halfLength;
@@ -53,23 +52,23 @@ namespace DotRecast.Recast.Toolset.Gizmos
                     v.X = vertices[i] - center.X;
                     v.Y = vertices[i + 1] - center.Y;
                     v.Z = vertices[i + 2] - center.Z;
-                    v = Vector3.Normalize(v);
+                    v = RcVec3f.Normalize(v);
                     gradient[i / 3] = Math.Clamp(0.57735026f * (v.X + v.Y + v.Z), -1, 1);
                 }
             }
         }
 
-        private Vector3 GetSideVector(Vector3 axis)
+        private RcVec3f GetSideVector(RcVec3f axis)
         {
-            Vector3 side = new Vector3(1, 0, 0);
+            RcVec3f side = new RcVec3f(1, 0, 0);
             if (axis.X > 0.8)
             {
-                side = new Vector3(0, 0, 1);
+                side = new RcVec3f(0, 0, 1);
             }
 
-            var forward = Vector3.Cross(side, axis);
-            side = Vector3.Cross(axis, forward);
-            side = Vector3.Normalize(side);
+            var forward = RcVec3f.Cross(side, axis);
+            side = RcVec3f.Cross(axis, forward);
+            side = RcVec3f.Normalize(side);
             return side;
         }
     }

src/DotRecast.Recast.Toolset/Gizmos/RcGizmoFactory.cs

@@ -1,26 +1,25 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Toolset.Gizmos
 {
     public static class RcGizmoFactory
     {
-        public static RcBoxGizmo Box(Vector3 center, Vector3[] halfEdges)
+        public static RcBoxGizmo Box(RcVec3f center, RcVec3f[] halfEdges)
         {
             return new RcBoxGizmo(center, halfEdges);
         }
 
-        public static RcSphereGizmo Sphere(Vector3 center, float radius)
+        public static RcSphereGizmo Sphere(RcVec3f center, float radius)
         {
             return new RcSphereGizmo(center, radius);
         }
 
-        public static RcCapsuleGizmo Capsule(Vector3 start, Vector3 end, float radius)
+        public static RcCapsuleGizmo Capsule(RcVec3f start, RcVec3f end, float radius)
         {
             return new RcCapsuleGizmo(start, end, radius);
         }
 
-        public static RcCylinderGizmo Cylinder(Vector3 start, Vector3 end, float radius)
+        public static RcCylinderGizmo Cylinder(RcVec3f start, RcVec3f end, float radius)
         {
             return new RcCylinderGizmo(start, end, radius);
         }

src/DotRecast.Recast.Toolset/Gizmos/RcSphereGizmo.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using static DotRecast.Recast.Toolset.Gizmos.RcGizmoHelper;
 
 
@@ -10,9 +9,9 @@ namespace DotRecast.Recast.Toolset.Gizmos
         public readonly float[] vertices;
         public readonly int[] triangles;
         public readonly float radius;
-        public readonly Vector3 center;
+        public readonly RcVec3f center;
 
-        public RcSphereGizmo(Vector3 center, float radius)
+        public RcSphereGizmo(RcVec3f center, float radius)
         {
             this.center = center;
             this.radius = radius;

src/DotRecast.Recast.Toolset/Tools/RcConvexVolumeTool.cs

@@ -2,19 +2,18 @@
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 
 namespace DotRecast.Recast.Toolset.Tools
 {
     public class RcConvexVolumeTool : IRcToolable
     {
-        private readonly List<Vector3> _pts;
+        private readonly List<RcVec3f> _pts;
         private readonly List<int> _hull;
 
         public RcConvexVolumeTool()
         {
-            _pts = new List<Vector3>();
+            _pts = new List<RcVec3f>();
             _hull = new List<int>();
         }
 
@@ -23,7 +22,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return "Convex Volumes";
         }
 
-        public List<Vector3> GetShapePoint()
+        public List<RcVec3f> GetShapePoint()
         {
             return _pts;
         }
@@ -39,16 +38,16 @@ namespace DotRecast.Recast.Toolset.Tools
             _hull.Clear();
         }
 
-        public bool PlottingShape(Vector3 p, out List<Vector3> pts, out List<int> hull)
+        public bool PlottingShape(RcVec3f p, out List<RcVec3f> pts, out List<int> hull)
         {
             pts = null;
             hull = null;
 
             // Create
             // If clicked on that last pt, create the shape.
-            if (_pts.Count > 0 && Vector3.DistanceSquared(p, _pts[_pts.Count - 1]) < 0.2f * 0.2f)
+            if (_pts.Count > 0 && RcVec3f.DistanceSquared(p, _pts[_pts.Count - 1]) < 0.2f * 0.2f)
             {
-                pts = new List<Vector3>(_pts);
+                pts = new List<RcVec3f>(_pts);
                 hull = new List<int>(_hull);
 
                 _pts.Clear();
@@ -75,7 +74,7 @@ namespace DotRecast.Recast.Toolset.Tools
         }
 
 
-        public RcConvexVolume RemoveByPos(IInputGeomProvider geom, Vector3 pos)
+        public bool TryRemove(IInputGeomProvider geom, RcVec3f pos, out RcConvexVolume volume)
         {
             // Delete
             int nearestIndex = -1;
@@ -91,26 +90,57 @@ namespace DotRecast.Recast.Toolset.Tools
 
             // If end point close enough, delete it.
             if (nearestIndex == -1)
-                return null;
+            {
+                volume = null;
+                return false;
+            }
 
             var removal = geom.ConvexVolumes()[nearestIndex];
             geom.ConvexVolumes().RemoveAt(nearestIndex);
-            return removal;
+            volume = removal;
+            return null != volume;
         }
 
-        public void Add(IInputGeomProvider geom, RcConvexVolume volume)
+        public bool TryAdd(IInputGeomProvider geom, RcVec3f p, RcAreaModification areaType, float boxDescent, float boxHeight, float polyOffset, out RcConvexVolume volume)
         {
+            // Create
+
+            // If clicked on that last pt, create the shape.
+            if (_pts.Count > 0 && RcVec3f.DistanceSquared(p, _pts[^1]) < 0.2f * 0.2f)
+            {
+                // 
+                if (_hull.Count > 2)
+                {
+                    volume = CreateConvexVolume(_pts, _hull, areaType, boxDescent, boxHeight, polyOffset);
                     geom.AddConvexVolume(volume);
                 }
 
-        public static RcConvexVolume CreateConvexVolume(List<Vector3> pts, List<int> hull, RcAreaModification areaType, float boxDescent, float boxHeight, float polyOffset)
+                _pts.Clear();
+                _hull.Clear();
+            }
+            else
             {
-            // 
-            if (hull.Count <= 2)
+                // Add new point
+                _pts.Add(p);
+
+                // Update hull.
+                if (_pts.Count > 1)
                 {
-                return null;
+                    _hull.Clear();
+                    _hull.AddRange(RcConvexUtils.Convexhull(_pts));
+                }
+                else
+                {
+                    _hull.Clear();
+                }
             }
 
+            volume = null;
+            return false;
+        }
+
+        public static RcConvexVolume CreateConvexVolume(List<RcVec3f> pts, List<int> hull, RcAreaModification areaType, float boxDescent, float boxHeight, float polyOffset)
+        {
             // Create shape.
             float[] verts = new float[hull.Count * 3];
             for (int i = 0; i < hull.Count; ++i)

src/DotRecast.Recast.Toolset/Tools/RcCrowdAgentData.cs

@@ -1,14 +1,13 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Toolset.Tools
 {
     public class RcCrowdAgentData
     {
         public readonly RcCrowdAgentType type;
-        public readonly Vector3 home = new Vector3();
+        public readonly RcVec3f home = new RcVec3f();
 
-        public RcCrowdAgentData(RcCrowdAgentType type, Vector3 home)
+        public RcCrowdAgentData(RcCrowdAgentType type, RcVec3f home)
         {
             this.type = type;
             this.home = home;

src/DotRecast.Recast.Toolset/Tools/RcCrowdAgentProfilingTool.cs

@@ -1,9 +1,11 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
 using DotRecast.Core;
+using DotRecast.Core.Buffers;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Detour.Crowd;
 using DotRecast.Recast.Toolset.Builder;
@@ -15,20 +17,28 @@ namespace DotRecast.Recast.Toolset.Tools
         private RcCrowdAgentProfilingToolConfig _cfg;
 
         private DtCrowdConfig _crowdCfg;
-        private DtCrowd crowd;
+        private DtCrowd _crowd;
         private readonly DtCrowdAgentConfig _agCfg;
 
-        private DtNavMesh navMesh;
+        private DtNavMesh _navMesh;
 
-        private RcRand rnd;
+        private IRcRand _rand;
         private readonly List<DtPolyPoint> _polyPoints;
-        private long crowdUpdateTime;
+
+        private const int SamplingCount = 500;
+        private long _samplingUpdateTime;
+        private readonly RcCyclicBuffer<long> _updateTimes;
+        private long _curUpdateTime;
+        private long _avgUpdateTime;
+        private long _minUpdateTime;
+        private long _maxUpdateTime;
 
         public RcCrowdAgentProfilingTool()
         {
             _cfg = new RcCrowdAgentProfilingToolConfig();
             _agCfg = new DtCrowdAgentConfig();
             _polyPoints = new List<DtPolyPoint>();
+            _updateTimes = new RcCyclicBuffer<long>(SamplingCount);
         }
 
         public string GetName()
@@ -48,12 +58,12 @@ namespace DotRecast.Recast.Toolset.Tools
 
         public DtCrowd GetCrowd()
         {
-            return crowd;
+            return _crowd;
         }
 
         public void Setup(float maxAgentRadius, DtNavMesh nav)
         {
-            navMesh = nav;
+            _navMesh = nav;
             if (nav != null)
             {
                 _crowdCfg = new DtCrowdConfig(maxAgentRadius);
@@ -75,20 +85,20 @@ namespace DotRecast.Recast.Toolset.Tools
             return ap;
         }
 
-        private DtStatus GetMobPosition(DtNavMeshQuery navquery, IDtQueryFilter filter, out Vector3 randomPt)
+        private DtStatus GetMobPosition(DtNavMeshQuery navquery, IDtQueryFilter filter, out RcVec3f randomPt)
         {
-            return navquery.FindRandomPoint(filter, rnd, out var randomRef, out randomPt);
+            return navquery.FindRandomPoint(filter, _rand, out var randomRef, out randomPt);
         }
 
-        private DtStatus GetVillagerPosition(DtNavMeshQuery navquery, IDtQueryFilter filter, out Vector3 randomPt)
+        private DtStatus GetVillagerPosition(DtNavMeshQuery navquery, IDtQueryFilter filter, out RcVec3f randomPt)
         {
-            randomPt = Vector3.Zero;
+            randomPt = RcVec3f.Zero;
 
             if (0 >= _polyPoints.Count)
                 return DtStatus.DT_FAILURE;
 
-            int zone = (int)(rnd.Next() * _polyPoints.Count);
-            return navquery.FindRandomPointWithinCircle(_polyPoints[zone].refs, _polyPoints[zone].pt, _cfg.zoneRadius, filter, rnd,
+            int zone = (int)(_rand.Next() * _polyPoints.Count);
+            return navquery.FindRandomPointWithinCircle(_polyPoints[zone].refs, _polyPoints[zone].pt, _cfg.zoneRadius, filter, _rand,
                 out var randomRef, out randomPt);
         }
 
@@ -96,19 +106,19 @@ namespace DotRecast.Recast.Toolset.Tools
         {
             _polyPoints.Clear();
             IDtQueryFilter filter = new DtQueryDefaultFilter();
-            DtNavMeshQuery navquery = new DtNavMeshQuery(navMesh);
+            DtNavMeshQuery navquery = new DtNavMeshQuery(_navMesh);
             for (int i = 0; i < _cfg.numberOfZones; i++)
             {
                 float zoneSeparation = _cfg.zoneRadius * _cfg.zoneRadius * 16;
                 for (int k = 0; k < 100; k++)
                 {
-                    var status = navquery.FindRandomPoint(filter, rnd, out var randomRef, out var randomPt);
+                    var status = navquery.FindRandomPoint(filter, _rand, out var randomRef, out var randomPt);
                     if (status.Succeeded())
                     {
                         bool valid = true;
                         foreach (var zone in _polyPoints)
                         {
-                            if (Vector3.DistanceSquared(zone.pt, randomPt) < zoneSeparation)
+                            if (RcVec3f.DistanceSquared(zone.pt, randomPt) < zoneSeparation)
                             {
                                 valid = false;
                                 break;
@@ -127,57 +137,65 @@ namespace DotRecast.Recast.Toolset.Tools
 
         private void CreateCrowd()
         {
-            crowd = new DtCrowd(_crowdCfg, navMesh, __ => new DtQueryDefaultFilter(
+            _crowd = new DtCrowd(_crowdCfg, _navMesh, __ => new DtQueryDefaultFilter(
                 SampleAreaModifications.SAMPLE_POLYFLAGS_ALL,
                 SampleAreaModifications.SAMPLE_POLYFLAGS_DISABLED,
                 new float[] { 1f, 10f, 1f, 1f, 2f, 1.5f })
             );
 
-            DtObstacleAvoidanceParams option = new DtObstacleAvoidanceParams(crowd.GetObstacleAvoidanceParams(0));
+            DtObstacleAvoidanceParams option = new DtObstacleAvoidanceParams(_crowd.GetObstacleAvoidanceParams(0));
             // Low (11)
             option.velBias = 0.5f;
             option.adaptiveDivs = 5;
             option.adaptiveRings = 2;
             option.adaptiveDepth = 1;
-            crowd.SetObstacleAvoidanceParams(0, option);
+            _crowd.SetObstacleAvoidanceParams(0, option);
             // Medium (22)
             option.velBias = 0.5f;
             option.adaptiveDivs = 5;
             option.adaptiveRings = 2;
             option.adaptiveDepth = 2;
-            crowd.SetObstacleAvoidanceParams(1, option);
+            _crowd.SetObstacleAvoidanceParams(1, option);
             // Good (45)
             option.velBias = 0.5f;
             option.adaptiveDivs = 7;
             option.adaptiveRings = 2;
             option.adaptiveDepth = 3;
-            crowd.SetObstacleAvoidanceParams(2, option);
+            _crowd.SetObstacleAvoidanceParams(2, option);
             // High (66)
             option.velBias = 0.5f;
             option.adaptiveDivs = 7;
             option.adaptiveRings = 3;
             option.adaptiveDepth = 3;
-            crowd.SetObstacleAvoidanceParams(3, option);
+            _crowd.SetObstacleAvoidanceParams(3, option);
         }
 
         public void StartProfiling(float agentRadius, float agentHeight, float agentMaxAcceleration, float agentMaxSpeed)
         {
-            if (null == navMesh)
+            if (null == _navMesh)
                 return;
 
-            rnd = new RcRand(_cfg.randomSeed);
+            // for benchmark
+            _updateTimes.Clear();
+            _samplingUpdateTime = 0;
+            _curUpdateTime = 0;
+            _avgUpdateTime = 0;
+            _minUpdateTime = 0;
+            _maxUpdateTime = 0;
+
+            _rand = new RcRand(_cfg.randomSeed);
             CreateCrowd();
             CreateZones();
-            DtNavMeshQuery navquery = new DtNavMeshQuery(navMesh);
+            DtNavMeshQuery navquery = new DtNavMeshQuery(_navMesh);
             IDtQueryFilter filter = new DtQueryDefaultFilter();
             for (int i = 0; i < _cfg.agents; i++)
             {
-                float tr = rnd.Next();
+                float tr = _rand.Next();
                 RcCrowdAgentType type = RcCrowdAgentType.MOB;
                 float mobsPcnt = _cfg.percentMobs / 100f;
                 if (tr > mobsPcnt)
                 {
-                    tr = rnd.Next();
+                    tr = _rand.Next();
                     float travellerPcnt = _cfg.percentTravellers / 100f;
                     if (tr > travellerPcnt)
                     {
@@ -190,7 +208,7 @@ namespace DotRecast.Recast.Toolset.Tools
                 }
 
                 var status = DtStatus.DT_FAILURE;
-                var randomPt = Vector3.Zero;
+                var randomPt = RcVec3f.Zero;
                 switch (type)
                 {
                     case RcCrowdAgentType.MOB:
@@ -214,19 +232,19 @@ namespace DotRecast.Recast.Toolset.Tools
         public void Update(float dt)
         {
             long startTime = RcFrequency.Ticks;
-            if (crowd != null)
+            if (_crowd != null)
             {
-                crowd.Config().pathQueueSize = _cfg.pathQueueSize;
-                crowd.Config().maxFindPathIterations = _cfg.maxIterations;
-                crowd.Update(dt, null);
+                _crowd.Config().pathQueueSize = _cfg.pathQueueSize;
+                _crowd.Config().maxFindPathIterations = _cfg.maxIterations;
+                _crowd.Update(dt, null);
             }
 
             long endTime = RcFrequency.Ticks;
-            if (crowd != null)
+            if (_crowd != null)
             {
-                DtNavMeshQuery navquery = new DtNavMeshQuery(navMesh);
+                DtNavMeshQuery navquery = new DtNavMeshQuery(_navMesh);
                 IDtQueryFilter filter = new DtQueryDefaultFilter();
-                foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
+                foreach (DtCrowdAgent ag in _crowd.GetActiveAgents())
                 {
                     if (NeedsNewTarget(ag))
                     {
@@ -247,20 +265,28 @@ namespace DotRecast.Recast.Toolset.Tools
                 }
             }
 
-            crowdUpdateTime = (endTime - startTime) / TimeSpan.TicksPerMillisecond;
+            var currentTime = endTime - startTime;
+            _updateTimes.PushBack(currentTime);
+
+            // for benchmark
+            _samplingUpdateTime = _updateTimes.Sum() / TimeSpan.TicksPerMillisecond;
+            _curUpdateTime = currentTime / TimeSpan.TicksPerMillisecond;
+            _avgUpdateTime = (long)(_updateTimes.Average() / TimeSpan.TicksPerMillisecond);
+            _minUpdateTime = _updateTimes.Min() / TimeSpan.TicksPerMillisecond;
+            _maxUpdateTime = _updateTimes.Max() / TimeSpan.TicksPerMillisecond;
         }
 
         private void MoveMob(DtNavMeshQuery navquery, IDtQueryFilter filter, DtCrowdAgent ag, RcCrowdAgentData crowAgentData)
         {
             // Move somewhere
-            var status = navquery.FindNearestPoly(ag.npos, crowd.GetQueryExtents(), filter, out var nearestRef, out var nearestPt, out var _);
+            var status = navquery.FindNearestPoly(ag.npos, _crowd.GetQueryExtents(), filter, out var nearestRef, out var nearestPt, out var _);
             if (status.Succeeded())
             {
-                status = navquery.FindRandomPointAroundCircle(nearestRef, crowAgentData.home, _cfg.zoneRadius * 2f, filter, rnd,
+                status = navquery.FindRandomPointAroundCircle(nearestRef, crowAgentData.home, _cfg.zoneRadius * 2f, filter, _rand,
                     out var randomRef, out var randomPt);
                 if (status.Succeeded())
                 {
-                    crowd.RequestMoveTarget(ag, randomRef, randomPt);
+                    _crowd.RequestMoveTarget(ag, randomRef, randomPt);
                 }
             }
         }
@@ -268,14 +294,14 @@ namespace DotRecast.Recast.Toolset.Tools
         private void MoveVillager(DtNavMeshQuery navquery, IDtQueryFilter filter, DtCrowdAgent ag, RcCrowdAgentData crowAgentData)
         {
             // Move somewhere close
-            var status = navquery.FindNearestPoly(ag.npos, crowd.GetQueryExtents(), filter, out var nearestRef, out var nearestPt, out var _);
+            var status = navquery.FindNearestPoly(ag.npos, _crowd.GetQueryExtents(), filter, out var nearestRef, out var nearestPt, out var _);
             if (status.Succeeded())
             {
-                status = navquery.FindRandomPointAroundCircle(nearestRef, crowAgentData.home, _cfg.zoneRadius * 0.2f, filter, rnd,
+                status = navquery.FindRandomPointAroundCircle(nearestRef, crowAgentData.home, _cfg.zoneRadius * 0.2f, filter, _rand,
                     out var randomRef, out var randomPt);
                 if (status.Succeeded())
                 {
-                    crowd.RequestMoveTarget(ag, randomRef, randomPt);
+                    _crowd.RequestMoveTarget(ag, randomRef, randomPt);
                 }
             }
         }
@@ -286,7 +312,7 @@ namespace DotRecast.Recast.Toolset.Tools
             List<DtPolyPoint> potentialTargets = new List<DtPolyPoint>();
             foreach (var zone in _polyPoints)
             {
-                if (Vector3.DistanceSquared(zone.pt, ag.npos) > _cfg.zoneRadius * _cfg.zoneRadius)
+                if (RcVec3f.DistanceSquared(zone.pt, ag.npos) > _cfg.zoneRadius * _cfg.zoneRadius)
                 {
                     potentialTargets.Add(zone);
                 }
@@ -295,7 +321,7 @@ namespace DotRecast.Recast.Toolset.Tools
             if (0 < potentialTargets.Count)
             {
                 potentialTargets.Shuffle();
-                crowd.RequestMoveTarget(ag, potentialTargets[0].refs, potentialTargets[0].pt);
+                _crowd.RequestMoveTarget(ag, potentialTargets[0].refs, potentialTargets[0].pt);
             }
         }
 
@@ -318,18 +344,18 @@ namespace DotRecast.Recast.Toolset.Tools
             return false;
         }
 
-        private DtCrowdAgent AddAgent(Vector3 p, RcCrowdAgentType type, float agentRadius, float agentHeight, float agentMaxAcceleration, float agentMaxSpeed)
+        private DtCrowdAgent AddAgent(RcVec3f p, RcCrowdAgentType type, float agentRadius, float agentHeight, float agentMaxAcceleration, float agentMaxSpeed)
         {
             DtCrowdAgentParams ap = GetAgentParams(agentRadius, agentHeight, agentMaxAcceleration, agentMaxSpeed);
             ap.userData = new RcCrowdAgentData(type, p);
-            return crowd.AddAgent(p, ap);
+            return _crowd.AddAgent(p, ap);
         }
 
         public void UpdateAgentParams()
         {
-            if (crowd != null)
+            if (_crowd != null)
             {
-                foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
+                foreach (DtCrowdAgent ag in _crowd.GetActiveAgents())
                 {
                     DtCrowdAgentParams option = new DtCrowdAgentParams();
                     option.radius = ag.option.radius;
@@ -343,14 +369,34 @@ namespace DotRecast.Recast.Toolset.Tools
                     option.updateFlags = _agCfg.GetUpdateFlags();
                     option.obstacleAvoidanceType = _agCfg.obstacleAvoidanceType;
                     option.separationWeight = _agCfg.separationWeight;
-                    crowd.UpdateAgentParameters(ag, option);
+                    _crowd.UpdateAgentParameters(ag, option);
                 }
             }
         }
 
+        public long GetCrowdUpdateSamplingTime()
+        {
+            return _samplingUpdateTime;
+        }
+
         public long GetCrowdUpdateTime()
         {
-            return crowdUpdateTime;
+            return _curUpdateTime;
+        }
+
+        public long GetCrowdUpdateAvgTime()
+        {
+            return _avgUpdateTime;
+        }
+
+        public long GetCrowdUpdateMinTime()
+        {
+            return _minUpdateTime;
+        }
+
+        public long GetCrowdUpdateMaxTime()
+        {
+            return _maxUpdateTime;
         }
     }
 }

src/DotRecast.Recast.Toolset/Tools/RcCrowdTool.cs

@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Detour.Crowd;
 using DotRecast.Recast.Toolset.Builder;
@@ -17,7 +16,7 @@ namespace DotRecast.Recast.Toolset.Tools
         private long crowdUpdateTime;
         private readonly Dictionary<long, RcCrowdAgentTrail> _trails;
         private long _moveTargetRef;
-        private Vector3 _moveTargetPos;
+        private RcVec3f _moveTargetPos;
 
         public RcCrowdTool()
         {
@@ -53,7 +52,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return _moveTargetRef;
         }
 
-        public Vector3 GetMoveTargetPos()
+        public RcVec3f GetMoveTargetPos()
         {
             return _moveTargetPos;
         }
@@ -171,7 +170,7 @@ namespace DotRecast.Recast.Toolset.Tools
             }
         }
 
-        public void AddAgent(Vector3 p, float agentRadius, float agentHeight, float agentMaxAcceleration, float agentMaxSpeed)
+        public void AddAgent(RcVec3f p, float agentRadius, float agentHeight, float agentMaxAcceleration, float agentMaxSpeed)
         {
             DtCrowdAgentParams ap = CreateAgentParams(agentRadius, agentHeight, agentMaxAcceleration, agentMaxSpeed);
             DtCrowdAgent ag = crowd.AddAgent(p, ap);
@@ -213,15 +212,15 @@ namespace DotRecast.Recast.Toolset.Tools
             return ap;
         }
 
-        public DtCrowdAgent HitTestAgents(Vector3 s, Vector3 p)
+        public DtCrowdAgent HitTestAgents(RcVec3f s, RcVec3f p)
         {
             DtCrowdAgent isel = null;
             float tsel = float.MaxValue;
 
             foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
             {
-                Vector3 bmin = new Vector3();
-                Vector3 bmax = new Vector3();
+                RcVec3f bmin = new RcVec3f();
+                RcVec3f bmax = new RcVec3f();
                 GetAgentBounds(ag, ref bmin, ref bmax);
                 if (RcIntersections.IsectSegAABB(s, p, bmin, bmax, out var tmin, out var tmax))
                 {
@@ -236,9 +235,9 @@ namespace DotRecast.Recast.Toolset.Tools
             return isel;
         }
 
-        private void GetAgentBounds(DtCrowdAgent ag, ref Vector3 bmin, ref Vector3 bmax)
+        private void GetAgentBounds(DtCrowdAgent ag, ref RcVec3f bmin, ref RcVec3f bmax)
         {
-            Vector3 p = ag.npos;
+            RcVec3f p = ag.npos;
             float r = ag.option.radius;
             float h = ag.option.height;
             bmin.X = p.X - r;
@@ -249,7 +248,7 @@ namespace DotRecast.Recast.Toolset.Tools
             bmax.Z = p.Z + r;
         }
 
-        public void SetMoveTarget(Vector3 p, bool adjust)
+        public void SetMoveTarget(RcVec3f p, bool adjust)
         {
             if (crowd == null)
                 return;
@@ -257,21 +256,21 @@ namespace DotRecast.Recast.Toolset.Tools
             // Find nearest point on navmesh and set move request to that location.
             DtNavMeshQuery navquery = crowd.GetNavMeshQuery();
             IDtQueryFilter filter = crowd.GetFilter(0);
-            Vector3 halfExtents = crowd.GetQueryExtents();
+            RcVec3f halfExtents = crowd.GetQueryExtents();
 
             if (adjust)
             {
                 // Request velocity
                 if (_agentDebug.agent != null)
                 {
-                    Vector3 vel = CalcVel(_agentDebug.agent.npos, p, _agentDebug.agent.option.maxSpeed);
+                    RcVec3f vel = CalcVel(_agentDebug.agent.npos, p, _agentDebug.agent.option.maxSpeed);
                     crowd.RequestMoveVelocity(_agentDebug.agent, vel);
                 }
                 else
                 {
                     foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
                     {
-                        Vector3 vel = CalcVel(ag.npos, p, ag.option.maxSpeed);
+                        RcVec3f vel = CalcVel(ag.npos, p, ag.option.maxSpeed);
                         crowd.RequestMoveVelocity(ag, vel);
                     }
                 }
@@ -293,11 +292,11 @@ namespace DotRecast.Recast.Toolset.Tools
             }
         }
 
-        private Vector3 CalcVel(Vector3 pos, Vector3 tgt, float speed)
+        private RcVec3f CalcVel(RcVec3f pos, RcVec3f tgt, float speed)
         {
-            Vector3 vel = Vector3.Subtract(tgt, pos);
+            RcVec3f vel = RcVec3f.Subtract(tgt, pos);
             vel.Y = 0.0f;
-            vel = Vector3.Normalize(vel);
+            vel = RcVec3f.Normalize(vel);
             return vel.Scale(speed);
         }
 

src/DotRecast.Recast.Toolset/Tools/RcDynamicUpdateTool.cs

@@ -4,7 +4,6 @@ using System.IO;
 using System.Threading.Tasks;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic;
 using DotRecast.Detour.Dynamic.Colliders;
 using DotRecast.Detour.Dynamic.Io;
@@ -48,7 +47,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return dynaMesh;
         }
 
-        public void RemoveShape(Vector3 start, Vector3 dir)
+        public void RemoveShape(RcVec3f start, RcVec3f dir)
         {
             foreach (var e in colliderGizmos)
             {
@@ -61,7 +60,7 @@ namespace DotRecast.Recast.Toolset.Tools
             }
         }
 
-        private bool Hit(Vector3 point, Vector3 dir, float[] bounds)
+        private bool Hit(RcVec3f point, RcVec3f dir, float[] bounds)
         {
             float cx = 0.5f * (bounds[0] + bounds[3]);
             float cy = 0.5f * (bounds[1] + bounds[4]);
@@ -90,7 +89,7 @@ namespace DotRecast.Recast.Toolset.Tools
         }
 
 
-        public RcGizmo AddShape(RcDynamicColliderShape colliderShape, Vector3 p)
+        public RcGizmo AddShape(RcDynamicColliderShape colliderShape, RcVec3f p)
         {
             if (dynaMesh == null)
             {
@@ -167,7 +166,7 @@ namespace DotRecast.Recast.Toolset.Tools
         }
 
 
-        public RcGizmo SphereCollider(Vector3 p, float walkableClimb)
+        public RcGizmo SphereCollider(RcVec3f p, float walkableClimb)
         {
             float radius = 1 + (float)random.NextDouble() * 10;
             var collider = new DtSphereCollider(p, radius, SampleAreaModifications.SAMPLE_POLYAREA_TYPE_WATER, walkableClimb);
@@ -176,86 +175,86 @@ namespace DotRecast.Recast.Toolset.Tools
             return new RcGizmo(collider, gizmo);
         }
 
-        public RcGizmo CapsuleCollider(Vector3 p, float walkableClimb)
+        public RcGizmo CapsuleCollider(RcVec3f p, float walkableClimb)
         {
             float radius = 0.4f + (float)random.NextDouble() * 4f;
-            Vector3 a = new Vector3(
+            RcVec3f a = new RcVec3f(
                 (1f - 2 * (float)random.NextDouble()),
                 0.01f + (float)random.NextDouble(),
                 (1f - 2 * (float)random.NextDouble())
             );
-            a = Vector3.Normalize(a);
+            a = RcVec3f.Normalize(a);
             
             float len = 1f + (float)random.NextDouble() * 20f;
             a.X *= len;
             a.Y *= len;
             a.Z *= len;
-            Vector3 start = new Vector3(p.X, p.Y, p.Z);
-            Vector3 end = new Vector3(p.X + a.X, p.Y + a.Y, p.Z + a.Z);
+            RcVec3f start = new RcVec3f(p.X, p.Y, p.Z);
+            RcVec3f end = new RcVec3f(p.X + a.X, p.Y + a.Y, p.Z + a.Z);
             var collider = new DtCapsuleCollider(start, end, radius, SampleAreaModifications.SAMPLE_POLYAREA_TYPE_WATER, walkableClimb);
             var gizmo = RcGizmoFactory.Capsule(start, end, radius);
             return new RcGizmo(collider, gizmo);
         }
 
-        public RcGizmo BoxCollider(Vector3 p, float walkableClimb)
+        public RcGizmo BoxCollider(RcVec3f p, float walkableClimb)
         {
-            Vector3 extent = new Vector3(
+            RcVec3f extent = new RcVec3f(
                 0.5f + (float)random.NextDouble() * 6f,
                 0.5f + (float)random.NextDouble() * 6f,
                 0.5f + (float)random.NextDouble() * 6f
             );
-            Vector3 forward = new Vector3((1f - 2 * (float)random.NextDouble()), 0, (1f - 2 * (float)random.NextDouble()));
-            Vector3 up = new Vector3((1f - 2 * (float)random.NextDouble()), 0.01f + (float)random.NextDouble(), (1f - 2 * (float)random.NextDouble()));
-            Vector3[] halfEdges = Detour.Dynamic.Colliders.DtBoxCollider.GetHalfEdges(up, forward, extent);
+            RcVec3f forward = new RcVec3f((1f - 2 * (float)random.NextDouble()), 0, (1f - 2 * (float)random.NextDouble()));
+            RcVec3f up = new RcVec3f((1f - 2 * (float)random.NextDouble()), 0.01f + (float)random.NextDouble(), (1f - 2 * (float)random.NextDouble()));
+            RcVec3f[] halfEdges = Detour.Dynamic.Colliders.DtBoxCollider.GetHalfEdges(up, forward, extent);
             var collider = new DtBoxCollider(p, halfEdges, SampleAreaModifications.SAMPLE_POLYAREA_TYPE_WATER, walkableClimb);
             var gizmo = RcGizmoFactory.Box(p, halfEdges);
             return new RcGizmo(collider, gizmo);
         }
 
-        public RcGizmo CylinderCollider(Vector3 p, float walkableClimb)
+        public RcGizmo CylinderCollider(RcVec3f p, float walkableClimb)
         {
             float radius = 0.7f + (float)random.NextDouble() * 4f;
-            Vector3 a = new Vector3(1f - 2 * (float)random.NextDouble(), 0.01f + (float)random.NextDouble(), 1f - 2 * (float)random.NextDouble());
-            a = Vector3.Normalize(a);
+            RcVec3f a = new RcVec3f(1f - 2 * (float)random.NextDouble(), 0.01f + (float)random.NextDouble(), 1f - 2 * (float)random.NextDouble());
+            a = RcVec3f.Normalize(a);
             float len = 2f + (float)random.NextDouble() * 20f;
             a.X *= len;
             a.Y *= len;
             a.Z *= len;
-            Vector3 start = new Vector3(p.X, p.Y, p.Z);
-            Vector3 end = new Vector3(p.X + a.X, p.Y + a.Y, p.Z + a.Z);
+            RcVec3f start = new RcVec3f(p.X, p.Y, p.Z);
+            RcVec3f end = new RcVec3f(p.X + a.X, p.Y + a.Y, p.Z + a.Z);
             var collider = new DtCylinderCollider(start, end, radius, SampleAreaModifications.SAMPLE_POLYAREA_TYPE_WATER, walkableClimb);
             var gizmo = RcGizmoFactory.Cylinder(start, end, radius);
 
             return new RcGizmo(collider, gizmo);
         }
 
-        public RcGizmo CompositeCollider(Vector3 p, float walkableClimb)
+        public RcGizmo CompositeCollider(RcVec3f p, float walkableClimb)
         {
-            Vector3 baseExtent = new Vector3(5, 3, 8);
-            Vector3 baseCenter = new Vector3(p.X, p.Y + 3, p.Z);
-            Vector3 baseUp = new Vector3(0, 1, 0);
-            Vector3 forward = new Vector3((1f - 2 * (float)random.NextDouble()), 0, (1f - 2 * (float)random.NextDouble()));
-            forward = Vector3.Normalize(forward);
+            RcVec3f baseExtent = new RcVec3f(5, 3, 8);
+            RcVec3f baseCenter = new RcVec3f(p.X, p.Y + 3, p.Z);
+            RcVec3f baseUp = new RcVec3f(0, 1, 0);
+            RcVec3f forward = new RcVec3f((1f - 2 * (float)random.NextDouble()), 0, (1f - 2 * (float)random.NextDouble()));
+            forward = RcVec3f.Normalize(forward);
             
-            Vector3 side = Vector3.Cross(forward, baseUp);
+            RcVec3f side = RcVec3f.Cross(forward, baseUp);
             DtBoxCollider @base = new DtBoxCollider(baseCenter, Detour.Dynamic.Colliders.DtBoxCollider.GetHalfEdges(baseUp, forward, baseExtent),
                 SampleAreaModifications.SAMPLE_POLYAREA_TYPE_ROAD, walkableClimb);
-            var roofUp = Vector3.Zero;
-            Vector3 roofExtent = new Vector3(4.5f, 4.5f, 8f);
+            var roofUp = RcVec3f.Zero;
+            RcVec3f roofExtent = new RcVec3f(4.5f, 4.5f, 8f);
             var rx = RcMatrix4x4f.CreateFromRotate(45, forward.X, forward.Y, forward.Z);
             roofUp = MulMatrixVector(ref roofUp, rx, baseUp);
-            Vector3 roofCenter = new Vector3(p.X, p.Y + 6, p.Z);
+            RcVec3f roofCenter = new RcVec3f(p.X, p.Y + 6, p.Z);
             DtBoxCollider roof = new DtBoxCollider(roofCenter, Detour.Dynamic.Colliders.DtBoxCollider.GetHalfEdges(roofUp, forward, roofExtent),
                 SampleAreaModifications.SAMPLE_POLYAREA_TYPE_ROAD, walkableClimb);
-            Vector3 trunkStart = new Vector3(
+            RcVec3f trunkStart = new RcVec3f(
                 baseCenter.X - forward.X * 15 + side.X * 6,
                 p.Y,
                 baseCenter.Z - forward.Z * 15 + side.Z * 6
             );
-            Vector3 trunkEnd = new Vector3(trunkStart.X, trunkStart.Y + 10, trunkStart.Z);
+            RcVec3f trunkEnd = new RcVec3f(trunkStart.X, trunkStart.Y + 10, trunkStart.Z);
             DtCapsuleCollider trunk = new DtCapsuleCollider(trunkStart, trunkEnd, 0.5f, SampleAreaModifications.SAMPLE_POLYAREA_TYPE_ROAD,
                 walkableClimb);
-            Vector3 crownCenter = new Vector3(
+            RcVec3f crownCenter = new RcVec3f(
                 baseCenter.X - forward.X * 15 + side.X * 6, p.Y + 10,
                 baseCenter.Z - forward.Z * 15 + side.Z * 6
             );
@@ -270,17 +269,17 @@ namespace DotRecast.Recast.Toolset.Tools
             return new RcGizmo(collider, gizmo);
         }
 
-        public RcGizmo TrimeshBridge(Vector3 p, float walkableClimb)
+        public RcGizmo TrimeshBridge(RcVec3f p, float walkableClimb)
         {
             return TrimeshCollider(p, bridgeGeom, walkableClimb);
         }
 
-        public RcGizmo TrimeshHouse(Vector3 p, float walkableClimb)
+        public RcGizmo TrimeshHouse(RcVec3f p, float walkableClimb)
         {
             return TrimeshCollider(p, houseGeom, walkableClimb);
         }
 
-        public RcGizmo ConvexTrimesh(Vector3 p, float walkableClimb)
+        public RcGizmo ConvexTrimesh(RcVec3f p, float walkableClimb)
         {
             float[] verts = TransformVertices(p, convexGeom, 360);
             var collider = new DtConvexTrimeshCollider(verts, convexGeom.faces,
@@ -289,7 +288,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return new RcGizmo(collider, gizmo);
         }
 
-        private RcGizmo TrimeshCollider(Vector3 p, DemoInputGeomProvider geom, float walkableClimb)
+        private RcGizmo TrimeshCollider(RcVec3f p, DemoInputGeomProvider geom, float walkableClimb)
         {
             float[] verts = TransformVertices(p, geom, 0);
             var collider = new DtTrimeshCollider(verts, geom.faces, SampleAreaModifications.SAMPLE_POLYAREA_TYPE_ROAD,
@@ -299,14 +298,14 @@ namespace DotRecast.Recast.Toolset.Tools
             return new RcGizmo(collider, gizmo);
         }
 
-        private float[] TransformVertices(Vector3 p, DemoInputGeomProvider geom, float ax)
+        private float[] TransformVertices(RcVec3f p, DemoInputGeomProvider geom, float ax)
         {
             var rx = RcMatrix4x4f.CreateFromRotate((float)random.NextDouble() * ax, 1, 0, 0);
             var ry = RcMatrix4x4f.CreateFromRotate((float)random.NextDouble() * 360, 0, 1, 0);
             var m = RcMatrix4x4f.Mul(ref rx, ref ry);
             float[] verts = new float[geom.vertices.Length];
-            Vector3 v = new Vector3();
-            Vector3 vr = new Vector3();
+            RcVec3f v = new RcVec3f();
+            RcVec3f vr = new RcVec3f();
             for (int i = 0; i < geom.vertices.Length; i += 3)
             {
                 v.X = geom.vertices[i];
@@ -332,7 +331,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return resultvector;
         }
 
-        private static Vector3 MulMatrixVector(ref Vector3 resultvector, RcMatrix4x4f matrix, Vector3 pvector)
+        private static RcVec3f MulMatrixVector(ref RcVec3f resultvector, RcMatrix4x4f matrix, RcVec3f pvector)
         {
             resultvector.X = matrix.M11 * pvector.X + matrix.M21 * pvector.Y + matrix.M31 * pvector.Z;
             resultvector.Y = matrix.M12 * pvector.X + matrix.M22 * pvector.Y + matrix.M32 * pvector.Z;
@@ -356,14 +355,14 @@ namespace DotRecast.Recast.Toolset.Tools
             return true;
         }
 
-        public bool Raycast(Vector3 spos, Vector3 epos, out float hitPos, out Vector3 raycastHitPos)
+        public bool Raycast(RcVec3f spos, RcVec3f epos, out float hitPos, out RcVec3f raycastHitPos)
         {
-            Vector3 sp = new Vector3(spos.X, spos.Y + 1.3f, spos.Z);
-            Vector3 ep = new Vector3(epos.X, epos.Y + 1.3f, epos.Z);
+            RcVec3f sp = new RcVec3f(spos.X, spos.Y + 1.3f, spos.Z);
+            RcVec3f ep = new RcVec3f(epos.X, epos.Y + 1.3f, epos.Z);
 
             bool hasHit = dynaMesh.VoxelQuery().Raycast(sp, ep, out hitPos);
             raycastHitPos = hasHit
-                ? new Vector3(sp.X + hitPos * (ep.X - sp.X), sp.Y + hitPos * (ep.Y - sp.Y), sp.Z + hitPos * (ep.Z - sp.Z))
+                ? new RcVec3f(sp.X + hitPos * (ep.X - sp.X), sp.Y + hitPos * (ep.Y - sp.Y), sp.Z + hitPos * (ep.Z - sp.Z))
                 : ep;
 
             return hasHit;

src/DotRecast.Recast.Toolset/Tools/RcJumpLinkBuilderTool.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Extras.Jumplink;
 using DotRecast.Recast.Geom;
 using DotRecast.Recast.Toolset.Builder;
@@ -112,11 +111,11 @@ namespace DotRecast.Recast.Toolset.Tools
         {
             int area = SampleAreaModifications.SAMPLE_POLYAREA_TYPE_JUMP_AUTO;
             int flags = SampleAreaModifications.SAMPLE_POLYFLAGS_JUMP;
-            Vector3 prev = new Vector3();
+            RcVec3f prev = new RcVec3f();
             for (int i = 0; i < link.startSamples.Length; i++)
             {
-                Vector3 p = link.startSamples[i].p;
-                Vector3 q = link.endSamples[i].p;
+                RcVec3f p = link.startSamples[i].p;
+                RcVec3f q = link.endSamples[i].p;
                 if (i == 0 || RcVecUtils.Dist2D(prev, p) > agentRadius)
                 {
                     geom.AddOffMeshConnection(p, q, agentRadius, false, area, flags);

src/DotRecast.Recast.Toolset/Tools/RcObstacleTool.cs

@@ -3,7 +3,6 @@ using System.Linq;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Detour.TileCache;
 using DotRecast.Detour.TileCache.Io.Compress;
@@ -97,7 +96,7 @@ namespace DotRecast.Recast.Toolset.Tools
             }
         }
 
-        public void RemoveTempObstacle(Vector3 sp, Vector3 sq)
+        public void RemoveTempObstacle(RcVec3f sp, RcVec3f sq)
         {
             if (null == _tc)
                 return;
@@ -106,7 +105,7 @@ namespace DotRecast.Recast.Toolset.Tools
             _tc.RemoveObstacle(refs);
         }
 
-        public long AddTempObstacle(Vector3 p)
+        public long AddTempObstacle(RcVec3f p)
         {
             if (null == _tc)
                 return 0;
@@ -149,7 +148,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return tc;
         }
 
-        public long HitTestObstacle(Vector3 sp, Vector3 sq)
+        public long HitTestObstacle(RcVec3f sp, RcVec3f sq)
         {
             float tmin = float.MaxValue;
             DtTileCacheObstacle obmin = null;
@@ -160,8 +159,8 @@ namespace DotRecast.Recast.Toolset.Tools
                 if (ob.state == DtObstacleState.DT_OBSTACLE_EMPTY)
                     continue;
 
-                Vector3 bmin = Vector3.Zero;
-                Vector3 bmax = Vector3.Zero;
+                RcVec3f bmin = RcVec3f.Zero;
+                RcVec3f bmax = RcVec3f.Zero;
                 _tc.GetObstacleBounds(ob, ref bmin, ref bmax);
 
                 if (RcIntersections.IsectSegAABB(sp, sq, bmin, bmax, out var t0, out var t1))

src/DotRecast.Recast.Toolset/Tools/RcOffMeshConnectionTool.cs

@@ -1,6 +1,5 @@
 using System;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 using DotRecast.Recast.Toolset.Builder;
 
@@ -17,7 +16,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return "Off-Mesh Links";
         }
 
-        public void Add(IInputGeomProvider geom, RcNavMeshBuildSettings settings, Vector3 start, Vector3 end, bool bidir)
+        public void Add(IInputGeomProvider geom, RcNavMeshBuildSettings settings, RcVec3f start, RcVec3f end, bool bidir)
         {
             if (null == geom)
                 return;
@@ -27,7 +26,7 @@ namespace DotRecast.Recast.Toolset.Tools
             geom.AddOffMeshConnection(start, end, settings.agentRadius, bidir, area, flags);
         }
 
-        public void Remove(IInputGeomProvider geom, RcNavMeshBuildSettings settings, Vector3 p)
+        public void Remove(IInputGeomProvider geom, RcNavMeshBuildSettings settings, RcVec3f p)
         {
             // Delete
             // Find nearest link end-point

src/DotRecast.Recast.Toolset/Tools/RcTestNavMeshTool.cs

@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 
 namespace DotRecast.Recast.Toolset.Tools
@@ -22,31 +21,31 @@ namespace DotRecast.Recast.Toolset.Tools
             return "Test Navmesh";
         }
 
-        public DtStatus FindFollowPath(DtNavMesh navMesh, DtNavMeshQuery navQuery, long startRef, long endRef, Vector3 startPt, Vector3 endPt, IDtQueryFilter filter, bool enableRaycast,
-            ref List<long> polys, ref List<Vector3> smoothPath)
+        public DtStatus FindFollowPath(DtNavMesh navMesh, DtNavMeshQuery navQuery, long startRef, long endRef, RcVec3f startPt, RcVec3f endPt, IDtQueryFilter filter, bool enableRaycast,
+            ref List<long> pathIterPolys, ref List<RcVec3f> smoothPath)
         {
             if (startRef == 0 || endRef == 0)
             {
-                polys?.Clear();
+                pathIterPolys?.Clear();
                 smoothPath?.Clear();
 
                 return DtStatus.DT_FAILURE;
             }
 
-            polys ??= new List<long>();
-            smoothPath ??= new List<Vector3>();
+            pathIterPolys ??= new List<long>();
+            smoothPath ??= new List<RcVec3f>();
 
-            polys.Clear();
+            pathIterPolys.Clear();
             smoothPath.Clear();
 
             var opt = new DtFindPathOption(enableRaycast ? DtFindPathOptions.DT_FINDPATH_ANY_ANGLE : 0, float.MaxValue);
-            navQuery.FindPath(startRef, endRef, startPt, endPt, filter, ref polys, opt);
-            if (0 >= polys.Count)
+            navQuery.FindPath(startRef, endRef, startPt, endPt, filter, ref pathIterPolys, opt);
+            if (0 >= pathIterPolys.Count)
                 return DtStatus.DT_FAILURE;
 
             // Iterate over the path to find smooth path on the detail mesh surface.
             navQuery.ClosestPointOnPoly(startRef, startPt, out var iterPos, out var _);
-            navQuery.ClosestPointOnPoly(polys[polys.Count - 1], endPt, out var targetPos, out var _);
+            navQuery.ClosestPointOnPoly(pathIterPolys[pathIterPolys.Count - 1], endPt, out var targetPos, out var _);
 
             float STEP_SIZE = 0.5f;
             float SLOP = 0.01f;
@@ -57,11 +56,11 @@ namespace DotRecast.Recast.Toolset.Tools
 
             // Move towards target a small advancement at a time until target reached or
             // when ran out of memory to store the path.
-            while (0 < polys.Count && smoothPath.Count < MAX_SMOOTH)
+            while (0 < pathIterPolys.Count && smoothPath.Count < MAX_SMOOTH)
             {
                 // Find location to steer towards.
                 if (!DtPathUtils.GetSteerTarget(navQuery, iterPos, targetPos, SLOP,
-                        polys, out var steerPos, out var steerPosFlag, out var steerPosRef))
+                        pathIterPolys, out var steerPos, out var steerPosFlag, out var steerPosRef))
                 {
                     break;
                 }
@@ -74,8 +73,8 @@ namespace DotRecast.Recast.Toolset.Tools
                     : false;
 
                 // Find movement delta.
-                Vector3 delta = Vector3.Subtract(steerPos, iterPos);
-                float len = MathF.Sqrt(Vector3.Dot(delta, delta));
+                RcVec3f delta = RcVec3f.Subtract(steerPos, iterPos);
+                float len = MathF.Sqrt(RcVec3f.Dot(delta, delta));
                 // If the steer target is end of path or off-mesh link, do not move past the location.
                 if ((endOfPath || offMeshConnection) && len < STEP_SIZE)
                 {
@@ -86,17 +85,17 @@ namespace DotRecast.Recast.Toolset.Tools
                     len = STEP_SIZE / len;
                 }
 
-                Vector3 moveTgt = RcVecUtils.Mad(iterPos, delta, len);
+                RcVec3f moveTgt = RcVecUtils.Mad(iterPos, delta, len);
 
                 // Move
-                navQuery.MoveAlongSurface(polys[0], iterPos, moveTgt, filter, out var result, ref visited);
+                navQuery.MoveAlongSurface(pathIterPolys[0], iterPos, moveTgt, filter, out var result, ref visited);
 
                 iterPos = result;
 
-                polys = DtPathUtils.MergeCorridorStartMoved(polys, visited);
-                polys = DtPathUtils.FixupShortcuts(polys, navQuery);
+                pathIterPolys = DtPathUtils.MergeCorridorStartMoved(pathIterPolys, pathIterPolys.Count, MAX_POLYS, visited);
+                pathIterPolys = DtPathUtils.FixupShortcuts(pathIterPolys, navQuery);
 
-                var status = navQuery.GetPolyHeight(polys[0], result, out var h);
+                var status = navQuery.GetPolyHeight(pathIterPolys[0], result, out var h);
                 if (status.Succeeded())
                 {
                     iterPos.Y = h;
@@ -117,21 +116,21 @@ namespace DotRecast.Recast.Toolset.Tools
                 else if (offMeshConnection && DtPathUtils.InRange(iterPos, steerPos, SLOP, 1.0f))
                 {
                     // Reached off-mesh connection.
-                    Vector3 startPos = Vector3.Zero;
-                    Vector3 endPos = Vector3.Zero;
+                    RcVec3f startPos = RcVec3f.Zero;
+                    RcVec3f endPos = RcVec3f.Zero;
 
                     // Advance the path up to and over the off-mesh connection.
                     long prevRef = 0;
-                    long polyRef = polys[0];
+                    long polyRef = pathIterPolys[0];
                     int npos = 0;
-                    while (npos < polys.Count && polyRef != steerPosRef)
+                    while (npos < pathIterPolys.Count && polyRef != steerPosRef)
                     {
                         prevRef = polyRef;
-                        polyRef = polys[npos];
+                        polyRef = pathIterPolys[npos];
                         npos++;
                     }
 
-                    polys = polys.GetRange(npos, polys.Count - npos);
+                    pathIterPolys = pathIterPolys.GetRange(npos, pathIterPolys.Count - npos);
 
                     // Handle the connection.
                     var status2 = navMesh.GetOffMeshConnectionPolyEndPoints(prevRef, polyRef, ref startPos, ref endPos);
@@ -149,7 +148,7 @@ namespace DotRecast.Recast.Toolset.Tools
 
                         // Move position at the other side of the off-mesh link.
                         iterPos = endPos;
-                        navQuery.GetPolyHeight(polys[0], iterPos, out var eh);
+                        navQuery.GetPolyHeight(pathIterPolys[0], iterPos, out var eh);
                         iterPos.Y = eh;
                     }
                 }
@@ -164,7 +163,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return DtStatus.DT_SUCCESS;
         }
 
-        public DtStatus FindStraightPath(DtNavMeshQuery navQuery, long startRef, long endRef, Vector3 startPt, Vector3 endPt, IDtQueryFilter filter, bool enableRaycast,
+        public DtStatus FindStraightPath(DtNavMeshQuery navQuery, long startRef, long endRef, RcVec3f startPt, RcVec3f endPt, IDtQueryFilter filter, bool enableRaycast,
             ref List<long> polys, ref List<DtStraightPath> straightPath, int straightPathOptions)
         {
             if (startRef == 0 || endRef == 0)
@@ -185,7 +184,7 @@ namespace DotRecast.Recast.Toolset.Tools
                 return DtStatus.DT_FAILURE;
 
             // In case of partial path, make sure the end point is clamped to the last polygon.
-            var epos = new Vector3(endPt.X, endPt.Y, endPt.Z);
+            var epos = new RcVec3f(endPt.X, endPt.Y, endPt.Z);
             if (polys[polys.Count - 1] != endRef)
             {
                 var result = navQuery.ClosestPointOnPoly(polys[polys.Count - 1], endPt, out var closest, out var _);
@@ -200,7 +199,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return DtStatus.DT_SUCCESS;
         }
 
-        public DtStatus InitSlicedFindPath(DtNavMeshQuery navQuery, long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter, bool enableRaycast)
+        public DtStatus InitSlicedFindPath(DtNavMeshQuery navQuery, long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter, bool enableRaycast)
         {
             if (startRef == 0 || endRef == 0)
             {
@@ -213,7 +212,7 @@ namespace DotRecast.Recast.Toolset.Tools
             );
         }
 
-        public DtStatus UpdateSlicedFindPath(DtNavMeshQuery navQuery, int maxIter, long endRef, Vector3 startPos, Vector3 endPos,
+        public DtStatus UpdateSlicedFindPath(DtNavMeshQuery navQuery, int maxIter, long endRef, RcVec3f startPos, RcVec3f endPos,
             ref List<long> path, ref List<DtStraightPath> straightPath)
         {
             var status = navQuery.UpdateSlicedFindPath(maxIter, out _);
@@ -229,7 +228,7 @@ namespace DotRecast.Recast.Toolset.Tools
             if (path != null)
             {
                 // In case of partial path, make sure the end point is clamped to the last polygon.
-                Vector3 epos = endPos;
+                RcVec3f epos = endPos;
                 if (path[path.Count - 1] != endRef)
                 {
                     var result = navQuery.ClosestPointOnPoly(path[path.Count - 1], endPos, out var closest, out var _);
@@ -247,8 +246,8 @@ namespace DotRecast.Recast.Toolset.Tools
         }
 
 
-        public DtStatus Raycast(DtNavMeshQuery navQuery, long startRef, long endRef, Vector3 startPos, Vector3 endPos, IDtQueryFilter filter,
-            ref List<long> polys, ref List<DtStraightPath> straightPath, ref Vector3 hitPos, ref Vector3 hitNormal, ref bool hitResult)
+        public DtStatus Raycast(DtNavMeshQuery navQuery, long startRef, long endRef, RcVec3f startPos, RcVec3f endPos, IDtQueryFilter filter,
+            ref List<long> polys, ref List<DtStraightPath> straightPath, ref RcVec3f hitPos, ref RcVec3f hitNormal, ref bool hitResult)
         {
             if (startRef == 0 || endRef == 0)
             {
@@ -258,16 +257,17 @@ namespace DotRecast.Recast.Toolset.Tools
                 return DtStatus.DT_FAILURE;
             }
 
-            var status = navQuery.Raycast(startRef, startPos, endPos, filter, 0, 0, out var rayHit);
+            var path = new List<long>();
+            var status = navQuery.Raycast(startRef, startPos, endPos, filter, out var t, out var hitNormal2, ref path);
             if (!status.Succeeded())
             {
                 return status;
             }
 
             // results ...
-            polys = rayHit.path;
+            polys = path;
 
-            if (rayHit.t > 1)
+            if (t > 1)
             {
                 // No hit
                 hitPos = endPos;
@@ -276,15 +276,15 @@ namespace DotRecast.Recast.Toolset.Tools
             else
             {
                 // Hit
-                hitPos = Vector3.Lerp(startPos, endPos, rayHit.t);
-                hitNormal = rayHit.hitNormal;
+                hitPos = RcVec3f.Lerp(startPos, endPos, t);
+                hitNormal = hitNormal2;
                 hitResult = true;
             }
 
             // Adjust height.
-            if (rayHit.path.Count > 0)
+            if (path.Count > 0)
             {
-                var result = navQuery.GetPolyHeight(rayHit.path[rayHit.path.Count - 1], hitPos, out var h);
+                var result = navQuery.GetPolyHeight(path[path.Count - 1], hitPos, out var h);
                 if (result.Succeeded())
                 {
                     hitPos.Y = h;
@@ -299,8 +299,8 @@ namespace DotRecast.Recast.Toolset.Tools
             return status;
         }
 
-        public DtStatus FindDistanceToWall(DtNavMeshQuery navQuery, long startRef, Vector3 spos, float maxRadius, IDtQueryFilter filter,
-            ref float hitDist, ref Vector3 hitPos, ref Vector3 hitNormal)
+        public DtStatus FindDistanceToWall(DtNavMeshQuery navQuery, long startRef, RcVec3f spos, float maxRadius, IDtQueryFilter filter,
+            ref float hitDist, ref RcVec3f hitPos, ref RcVec3f hitNormal)
         {
             if (0 == startRef)
             {
@@ -321,7 +321,7 @@ namespace DotRecast.Recast.Toolset.Tools
         }
 
 
-        public DtStatus FindPolysAroundCircle(DtNavMeshQuery navQuery, long startRef, long endRef, Vector3 spos, Vector3 epos, IDtQueryFilter filter, ref List<long> resultRef, ref List<long> resultParent)
+        public DtStatus FindPolysAroundCircle(DtNavMeshQuery navQuery, long startRef, long endRef, RcVec3f spos, RcVec3f epos, IDtQueryFilter filter, ref List<long> resultRef, ref List<long> resultParent)
         {
             if (startRef == 0 || endRef == 0)
             {
@@ -345,7 +345,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return status;
         }
 
-        public DtStatus FindLocalNeighbourhood(DtNavMeshQuery navQuery, long startRef, Vector3 spos, float radius, IDtQueryFilter filter,
+        public DtStatus FindLocalNeighbourhood(DtNavMeshQuery navQuery, long startRef, RcVec3f spos, float radius, IDtQueryFilter filter,
             ref List<long> resultRef, ref List<long> resultParent)
         {
             if (startRef == 0)
@@ -366,8 +366,8 @@ namespace DotRecast.Recast.Toolset.Tools
         }
 
 
-        public DtStatus FindPolysAroundShape(DtNavMeshQuery navQuery, float agentHeight, long startRef, long endRef, Vector3 spos, Vector3 epos, IDtQueryFilter filter,
-            ref List<long> resultRefs, ref List<long> resultParents, ref Vector3[] queryPoly)
+        public DtStatus FindPolysAroundShape(DtNavMeshQuery navQuery, float agentHeight, long startRef, long endRef, RcVec3f spos, RcVec3f epos, IDtQueryFilter filter,
+            ref List<long> resultRefs, ref List<long> resultParents, ref RcVec3f[] queryPoly)
         {
             if (startRef == 0 || endRef == 0)
             {
@@ -377,7 +377,7 @@ namespace DotRecast.Recast.Toolset.Tools
             float nx = (epos.Z - spos.Z) * 0.25f;
             float nz = -(epos.X - spos.X) * 0.25f;
 
-            var tempQueryPoly = new Vector3[4];
+            var tempQueryPoly = new RcVec3f[4];
             tempQueryPoly[0].X = spos.X + nx * 1.2f;
             tempQueryPoly[0].Y = spos.Y + agentHeight / 2;
             tempQueryPoly[0].Z = spos.Z + nz * 1.2f;
@@ -408,8 +408,8 @@ namespace DotRecast.Recast.Toolset.Tools
             return status;
         }
 
-        public DtStatus FindRandomPointAroundCircle(DtNavMeshQuery navQuery, long startRef, long endRef, Vector3 spos, Vector3 epos, IDtQueryFilter filter, bool constrainByCircle, int count,
-            ref List<Vector3> points)
+        public DtStatus FindRandomPointAroundCircle(DtNavMeshQuery navQuery, long startRef, long endRef, RcVec3f spos, RcVec3f epos, IDtQueryFilter filter, bool constrainByCircle, int count,
+            ref List<RcVec3f> points)
         {
             if (startRef == 0 || endRef == 0)
             {
@@ -427,7 +427,7 @@ namespace DotRecast.Recast.Toolset.Tools
             var frand = new RcRand();
             int prevCnt = points.Count;
 
-            points = new List<Vector3>();
+            points = new List<RcVec3f>();
             while (0 < count && points.Count < prevCnt + count)
             {
                 var status = navQuery.FindRandomPointAroundCircle(startRef, spos, dist, filter, frand, constraint,

src/DotRecast.Recast.Toolset/Tools/RcTileTool.cs

@@ -2,7 +2,6 @@
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour;
 using DotRecast.Recast.Geom;
 using DotRecast.Recast.Toolset.Builder;
@@ -75,8 +74,8 @@ namespace DotRecast.Recast.Toolset.Tools
                 return false;
             }
 
-            Vector3 bmin = geom.GetMeshBoundsMin();
-            Vector3 bmax = geom.GetMeshBoundsMax();
+            RcVec3f bmin = geom.GetMeshBoundsMin();
+            RcVec3f bmax = geom.GetMeshBoundsMax();
 
             RcConfig cfg = new RcConfig(
                 true, settings.tileSize, settings.tileSize,
@@ -113,7 +112,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return true;
         }
 
-        public bool BuildTile(IInputGeomProvider geom, RcNavMeshBuildSettings settings, DtNavMesh navMesh, Vector3 pos, out long tileBuildTicks, out int tileTriCount, out int tileMemUsage)
+        public bool BuildTile(IInputGeomProvider geom, RcNavMeshBuildSettings settings, DtNavMesh navMesh, RcVec3f pos, out long tileBuildTicks, out int tileTriCount, out int tileMemUsage)
         {
             tileBuildTicks = 0;
             tileTriCount = 0;
@@ -124,8 +123,8 @@ namespace DotRecast.Recast.Toolset.Tools
 
             float ts = settings.tileSize * settings.cellSize;
 
-            Vector3 bmin = geom.GetMeshBoundsMin();
-            Vector3 bmax = geom.GetMeshBoundsMax();
+            RcVec3f bmin = geom.GetMeshBoundsMin();
+            RcVec3f bmax = geom.GetMeshBoundsMax();
 
             int tx = (int)((pos.X - bmin.X) / ts);
             int ty = (int)((pos.Z - bmin.Z) / ts);
@@ -133,7 +132,7 @@ namespace DotRecast.Recast.Toolset.Tools
             return BuildTile(geom, settings, navMesh, tx, ty, out tileBuildTicks, out tileTriCount, out tileMemUsage);
         }
 
-        public bool RemoveTile(IInputGeomProvider geom, RcNavMeshBuildSettings settings, DtNavMesh navMesh, Vector3 pos)
+        public bool RemoveTile(IInputGeomProvider geom, RcNavMeshBuildSettings settings, DtNavMesh navMesh, RcVec3f pos)
         {
             if (null == settings || null == geom || navMesh == null)
                 return false;

src/DotRecast.Recast/DotRecast.Recast.csproj

@@ -5,11 +5,12 @@
     <PackageId>DotRecast.Recast</PackageId>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Authors>ikpil</Authors>
-    <Description>DotRecast - a port of Recast Detour, navigation mesh toolset for games, Unity3D, servers, C#</Description>
+    <Description>DotRecast - a port of Recast Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers</Description>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/ikpil/DotRecast</PackageProjectUrl>
     <RepositoryUrl>https://github.com/ikpil/DotRecast</RepositoryUrl>
     <PackageTags>game gamedev ai csharp server unity navigation game-development unity3d pathfinding pathfinder recast detour navmesh crowd-simulation recastnavigation</PackageTags>
+    <PackageReleaseNotes>https://github.com/ikpil/DotRecast/blob/main/CHANGELOG.md</PackageReleaseNotes>
   </PropertyGroup>
 
   <ItemGroup>

src/DotRecast.Recast/Geom/BoundsItem.cs

@@ -1,12 +1,11 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Geom
 {
     public class BoundsItem
     {
-        public Vector2 bmin;
-        public Vector2 bmax;
+        public RcVec2f bmin;
+        public RcVec2f bmax;
         public int i;
     }
 }

src/DotRecast.Recast/Geom/IInputGeomProvider.cs

@@ -21,16 +21,15 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Geom
 {
     public interface IInputGeomProvider
     {
         RcTriMesh GetMesh();
-        Vector3 GetMeshBoundsMin();
+        RcVec3f GetMeshBoundsMin();
 
-        Vector3 GetMeshBoundsMax();
+        RcVec3f GetMeshBoundsMax();
 
         IEnumerable<RcTriMesh> Meshes();
         
@@ -40,7 +39,7 @@ namespace DotRecast.Recast.Geom
 
         // off mesh connections
         public List<RcOffMeshConnection> GetOffMeshConnections();
-        public void AddOffMeshConnection(Vector3 start, Vector3 end, float radius, bool bidir, int area, int flags);
+        public void AddOffMeshConnection(RcVec3f start, RcVec3f end, float radius, bool bidir, int area, int flags);
         public void RemoveOffMeshConnections(Predicate<RcOffMeshConnection> filter);
 
     }

src/DotRecast.Recast/Geom/RcChunkyTriMesh.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Geom
 {
@@ -31,7 +30,7 @@ namespace DotRecast.Recast.Geom
         private int ntris;
         private int maxTrisPerChunk;
 
-        private void CalcExtends(BoundsItem[] items, int imin, int imax, ref Vector2 bmin, ref Vector2 bmax)
+        private void CalcExtends(BoundsItem[] items, int imin, int imax, ref RcVec2f bmin, ref RcVec2f bmax)
         {
             bmin.X = items[imin].bmin.X;
             bmin.Y = items[imin].bmin.Y;
@@ -186,7 +185,7 @@ namespace DotRecast.Recast.Geom
             }
         }
 
-        private bool CheckOverlapRect(float[] amin, float[] amax, Vector2 bmin, Vector2 bmax)
+        private bool CheckOverlapRect(float[] amin, float[] amax, RcVec2f bmin, RcVec2f bmax)
         {
             bool overlap = true;
             overlap = (amin[0] > bmax.X || amax[0] < bmin.X) ? false : overlap;
@@ -223,7 +222,7 @@ namespace DotRecast.Recast.Geom
             return ids;
         }
 
-        public List<RcChunkyTriMeshNode> GetChunksOverlappingSegment(Vector2 p, Vector2 q)
+        public List<RcChunkyTriMeshNode> GetChunksOverlappingSegment(RcVec2f p, RcVec2f q)
         {
             // Traverse tree
             List<RcChunkyTriMeshNode> ids = new List<RcChunkyTriMeshNode>();
@@ -252,13 +251,13 @@ namespace DotRecast.Recast.Geom
             return ids;
         }
 
-        private bool CheckOverlapSegment(Vector2 p, Vector2 q, Vector2 bmin, Vector2 bmax)
+        private bool CheckOverlapSegment(RcVec2f p, RcVec2f q, RcVec2f bmin, RcVec2f bmax)
         {
             const float EPSILON = 1e-6f;
 
             float tmin = 0;
             float tmax = 1;
-            var d = new Vector2();
+            var d = new RcVec2f();
             d.X = q.X - p.X;
             d.Y = q.Y - p.Y;
 

src/DotRecast.Recast/Geom/RcChunkyTriMeshNode.cs

@@ -1,12 +1,11 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Geom
 {
     public class RcChunkyTriMeshNode
     {
-        public Vector2 bmin;
-        public Vector2 bmax;
+        public RcVec2f bmin;
+        public RcVec2f bmax;
         public int i;
         public int[] tris;
     }

src/DotRecast.Recast/Geom/RcOffMeshConnection.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Geom
 {
@@ -34,7 +33,7 @@ namespace DotRecast.Recast.Geom
         public readonly int flags;
         public readonly int userId;
 
-        public RcOffMeshConnection(Vector3 start, Vector3 end, float radius, bool bidir, int area, int flags)
+        public RcOffMeshConnection(RcVec3f start, RcVec3f end, float radius, bool bidir, int area, int flags)
         {
             verts = new float[6];
             verts[0] = start.X;

src/DotRecast.Recast/Geom/SimpleInputGeomProvider.cs

@@ -23,7 +23,6 @@ using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast.Geom
 {
@@ -32,8 +31,8 @@ namespace DotRecast.Recast.Geom
         public readonly float[] vertices;
         public readonly int[] faces;
         public readonly float[] normals;
-        private Vector3 bmin;
-        private Vector3 bmax;
+        private RcVec3f bmin;
+        private RcVec3f bmax;
 
         private readonly List<RcConvexVolume> volumes = new List<RcConvexVolume>();
         private readonly RcTriMesh _mesh;
@@ -94,12 +93,12 @@ namespace DotRecast.Recast.Geom
             return _mesh;
         }
 
-        public Vector3 GetMeshBoundsMin()
+        public RcVec3f GetMeshBoundsMin()
         {
             return bmin;
         }
 
-        public Vector3 GetMeshBoundsMax()
+        public RcVec3f GetMeshBoundsMax()
         {
             return bmax;
         }
@@ -133,7 +132,7 @@ namespace DotRecast.Recast.Geom
             throw new NotImplementedException();
         }
 
-        public void AddOffMeshConnection(Vector3 start, Vector3 end, float radius, bool bidir, int area, int flags)
+        public void AddOffMeshConnection(RcVec3f start, RcVec3f end, float radius, bool bidir, int area, int flags)
         {
             throw new NotImplementedException();
         }
@@ -151,8 +150,8 @@ namespace DotRecast.Recast.Geom
                 int v1 = faces[i + 1] * 3;
                 int v2 = faces[i + 2] * 3;
 
-                var e0 = new Vector3();
-                var e1 = new Vector3();
+                var e0 = new RcVec3f();
+                var e1 = new RcVec3f();
                 e0.X = vertices[v1 + 0] - vertices[v0 + 0];
                 e0.Y = vertices[v1 + 1] - vertices[v0 + 1];
                 e0.Z = vertices[v1 + 2] - vertices[v0 + 2];

src/DotRecast.Recast/RcAreas.cs

@@ -22,7 +22,6 @@ using System;
 using DotRecast.Core;
 using DotRecast.Core.Collections;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -45,7 +44,7 @@ namespace DotRecast.Recast
         /// @param[in]		erosionRadius		The radius of erosion. [Limits: 0 < value < 255] [Units: vx]
         /// @param[in,out]	compactHeightfield	The populated compact heightfield to erode.
         /// @returns True if the operation completed successfully.
-        public static void ErodeWalkableArea(RcTelemetry context, int erosionRadius, RcCompactHeightfield compactHeightfield)
+        public static void ErodeWalkableArea(RcContext context, int erosionRadius, RcCompactHeightfield compactHeightfield)
         {
             int xSize = compactHeightfield.width;
             int zSize = compactHeightfield.height;
@@ -262,7 +261,7 @@ namespace DotRecast.Recast
         /// @param[in,out]	context		The build context to use during the operation.
         /// @param[in,out]	compactHeightfield		A populated compact heightfield.
         /// @returns True if the operation completed successfully.
-        public static bool MedianFilterWalkableArea(RcTelemetry context, RcCompactHeightfield compactHeightfield)
+        public static bool MedianFilterWalkableArea(RcContext context, RcCompactHeightfield compactHeightfield)
         {
             int xSize = compactHeightfield.width;
             int zSize = compactHeightfield.height;
@@ -345,7 +344,7 @@ namespace DotRecast.Recast
         /// @param[in]		boxMaxBounds		The maximum extents of the bounding box. [(x, y, z)] [Units: wu]
         /// @param[in]		areaId				The area id to apply. [Limit: <= #RC_WALKABLE_AREA]
         /// @param[in,out]	compactHeightfield	A populated compact heightfield.
-        public static void MarkBoxArea(RcTelemetry context, float[] boxMinBounds, float[] boxMaxBounds, RcAreaModification areaId, RcCompactHeightfield compactHeightfield)
+        public static void MarkBoxArea(RcContext context, float[] boxMinBounds, float[] boxMaxBounds, RcAreaModification areaId, RcCompactHeightfield compactHeightfield)
         {
             using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_MARK_BOX_AREA);
 
@@ -447,7 +446,7 @@ namespace DotRecast.Recast
         /// @param[in]		maxY				The height of the top of the polygon. [Units: wu]
         /// @param[in]		areaId				The area id to apply. [Limit: <= #RC_WALKABLE_AREA]
         /// @param[in,out]	compactHeightfield	A populated compact heightfield.
-        public static void MarkConvexPolyArea(RcTelemetry context, float[] verts,
+        public static void MarkConvexPolyArea(RcContext context, float[] verts,
             float minY, float maxY, RcAreaModification areaId,
             RcCompactHeightfield compactHeightfield)
         {
@@ -458,8 +457,8 @@ namespace DotRecast.Recast
             int zStride = xSize; // For readability
 
             // Compute the bounding box of the polygon
-            Vector3 bmin = RcVecUtils.Create(verts);
-            Vector3 bmax = RcVecUtils.Create(verts);
+            RcVec3f bmin = RcVecUtils.Create(verts);
+            RcVec3f bmax = RcVecUtils.Create(verts);
             for (int i = 3; i < verts.Length; i += 3)
             {
                 bmin = RcVecUtils.Min(bmin, verts, i);
@@ -540,7 +539,7 @@ namespace DotRecast.Recast
                             continue;
                         }
 
-                        Vector3 point = new Vector3(
+                        RcVec3f point = new RcVec3f(
                             compactHeightfield.bmin.X + (x + 0.5f) * compactHeightfield.cs,
                             0,
                             compactHeightfield.bmin.Z + (z + 0.5f) * compactHeightfield.cs
@@ -568,7 +567,7 @@ namespace DotRecast.Recast
         /// @param[in]		height				The height of the cylinder. [Units: wu] [Limit: > 0]
         /// @param[in]		areaId				The area id to apply. [Limit: <= #RC_WALKABLE_AREA]
         /// @param[in,out]	compactHeightfield	A populated compact heightfield.
-        public static void MarkCylinderArea(RcTelemetry context, float[] position, float radius, float height,
+        public static void MarkCylinderArea(RcContext context, float[] position, float radius, float height,
             RcAreaModification areaId, RcCompactHeightfield compactHeightfield)
         {
             using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_MARK_CYLINDER_AREA);
@@ -578,13 +577,13 @@ namespace DotRecast.Recast
             int zStride = xSize; // For readability
 
             // Compute the bounding box of the cylinder
-            Vector3 cylinderBBMin = new Vector3(
+            RcVec3f cylinderBBMin = new RcVec3f(
                 position[0] - radius,
                 position[1],
                 position[2] - radius
             );
 
-            Vector3 cylinderBBMax = new Vector3(
+            RcVec3f cylinderBBMax = new RcVec3f(
                 position[0] + radius,
                 position[1] + height,
                 position[2] + radius
@@ -680,7 +679,7 @@ namespace DotRecast.Recast
             }
         }
 
-        // public static bool PointInPoly(float[] verts, Vector3 p)
+        // public static bool PointInPoly(float[] verts, RcVec3f p)
         // {
         //     bool c = false;
         //     int i, j;
@@ -704,13 +703,13 @@ namespace DotRecast.Recast
         /// @param[in]	verts		The polygon vertices
         /// @param[in]	point		The point to check
         /// @returns true if the point lies within the polygon, false otherwise.
-        public static bool PointInPoly(float[] verts, Vector3 point)
+        public static bool PointInPoly(float[] verts, RcVec3f point)
         {
             bool inPoly = false;
             for (int i = 0, j = verts.Length / 3 - 1; i < verts.Length / 3; j = i++)
             {
-                Vector3 vi = new Vector3(verts[i * 3], verts[i * 3 + 1], verts[i * 3 + 2]);
-                Vector3 vj = new Vector3(verts[j * 3], verts[j * 3 + 1], verts[j * 3 + 2]);
+                RcVec3f vi = new RcVec3f(verts[i * 3], verts[i * 3 + 1], verts[i * 3 + 2]);
+                RcVec3f vj = new RcVec3f(verts[j * 3], verts[j * 3 + 1], verts[j * 3 + 2]);
                 if (vi.Z > point.Z == vj.Z > point.Z)
                 {
                     continue;
@@ -754,17 +753,17 @@ namespace DotRecast.Recast
                 int vertIndexB = vertIndex;
                 int vertIndexC = (vertIndex + 1) % numVerts;
 
-                Vector3 vertA = RcVecUtils.Create(verts, vertIndexA * 3);
-                Vector3 vertB = RcVecUtils.Create(verts, vertIndexB * 3);
-                Vector3 vertC = RcVecUtils.Create(verts, vertIndexC * 3);
+                RcVec3f vertA = RcVecUtils.Create(verts, vertIndexA * 3);
+                RcVec3f vertB = RcVecUtils.Create(verts, vertIndexB * 3);
+                RcVec3f vertC = RcVecUtils.Create(verts, vertIndexC * 3);
 
                 // From A to B on the x/z plane
-                Vector3 prevSegmentDir = Vector3.Subtract(vertB, vertA);
+                RcVec3f prevSegmentDir = RcVec3f.Subtract(vertB, vertA);
                 prevSegmentDir.Y = 0; // Squash onto x/z plane
                 prevSegmentDir = RcVecUtils.SafeNormalize(prevSegmentDir);
 
                 // From B to C on the x/z plane
-                Vector3 currSegmentDir = Vector3.Subtract(vertC, vertB);
+                RcVec3f currSegmentDir = RcVec3f.Subtract(vertC, vertB);
                 currSegmentDir.Y = 0; // Squash onto x/z plane
                 currSegmentDir = RcVecUtils.SafeNormalize(currSegmentDir);
 

src/DotRecast.Recast/RcAxis.cs

@@ -0,0 +1,9 @@
+namespace DotRecast.Recast
+{
+    public static class RcAxis
+    {
+        public const int RC_AXIS_X = 0;
+        public const int RC_AXIS_Y = 1;
+        public const int RC_AXIS_Z = 2;
+    };
+}

src/DotRecast.Recast/RcBuilder.cs

@@ -24,7 +24,6 @@ using System.Threading;
 using System.Threading.Tasks;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 
 namespace DotRecast.Recast
@@ -48,8 +47,8 @@ namespace DotRecast.Recast
 
         public List<RcBuilderResult> BuildTiles(IInputGeomProvider geom, RcConfig cfg, TaskFactory taskFactory)
         {
-            Vector3 bmin = geom.GetMeshBoundsMin();
-            Vector3 bmax = geom.GetMeshBoundsMax();
+            RcVec3f bmin = geom.GetMeshBoundsMin();
+            RcVec3f bmax = geom.GetMeshBoundsMax();
             CalcTileCount(bmin, bmax, cfg.Cs, cfg.TileSizeX, cfg.TileSizeZ, out var tw, out var th);
             List<RcBuilderResult> results = new List<RcBuilderResult>();
             if (null != taskFactory)
@@ -67,8 +66,8 @@ namespace DotRecast.Recast
 
         public Task BuildTilesAsync(IInputGeomProvider geom, RcConfig cfg, int threads, List<RcBuilderResult> results, TaskFactory taskFactory, CancellationToken cancellationToken)
         {
-            Vector3 bmin = geom.GetMeshBoundsMin();
-            Vector3 bmax = geom.GetMeshBoundsMax();
+            RcVec3f bmin = geom.GetMeshBoundsMin();
+            RcVec3f bmax = geom.GetMeshBoundsMax();
             CalcTileCount(bmin, bmax, cfg.Cs, cfg.TileSizeX, cfg.TileSizeZ, out var tw, out var th);
             Task task;
             if (1 < threads)
@@ -83,7 +82,7 @@ namespace DotRecast.Recast
             return task;
         }
 
-        private Task BuildSingleThreadAsync(IInputGeomProvider geom, RcConfig cfg, Vector3 bmin, Vector3 bmax,
+        private Task BuildSingleThreadAsync(IInputGeomProvider geom, RcConfig cfg, RcVec3f bmin, RcVec3f bmax,
             int tw, int th, List<RcBuilderResult> results)
         {
             RcAtomicInteger counter = new RcAtomicInteger(0);
@@ -98,7 +97,7 @@ namespace DotRecast.Recast
             return Task.CompletedTask;
         }
 
-        private Task BuildMultiThreadAsync(IInputGeomProvider geom, RcConfig cfg, Vector3 bmin, Vector3 bmax,
+        private Task BuildMultiThreadAsync(IInputGeomProvider geom, RcConfig cfg, RcVec3f bmin, RcVec3f bmax,
             int tw, int th, List<RcBuilderResult> results, TaskFactory taskFactory, CancellationToken cancellationToken)
         {
             RcAtomicInteger counter = new RcAtomicInteger(0);
@@ -148,7 +147,7 @@ namespace DotRecast.Recast
             return Task.WhenAll(tasks.ToArray());
         }
 
-        public RcBuilderResult BuildTile(IInputGeomProvider geom, RcConfig cfg, Vector3 bmin, Vector3 bmax, int tx,
+        public RcBuilderResult BuildTile(IInputGeomProvider geom, RcConfig cfg, RcVec3f bmin, RcVec3f bmax, int tx,
             int ty, RcAtomicInteger counter, int total)
         {
             RcBuilderResult result = Build(geom, new RcBuilderConfig(cfg, bmin, bmax, tx, ty));
@@ -163,62 +162,50 @@ namespace DotRecast.Recast
         public RcBuilderResult Build(IInputGeomProvider geom, RcBuilderConfig builderCfg)
         {
             RcConfig cfg = builderCfg.cfg;
-            RcTelemetry ctx = new RcTelemetry();
+            RcContext ctx = new RcContext();
             //
             // Step 1. Rasterize input polygon soup.
             //
-            RcHeightfield solid = RcVoxelizations.BuildSolidHeightfield(geom, builderCfg, ctx);
-            return Build(builderCfg.tileX, builderCfg.tileZ, geom, cfg, solid, ctx);
+            RcHeightfield solid = RcVoxelizations.BuildSolidHeightfield(ctx, geom, builderCfg);
+            return Build(ctx, builderCfg.tileX, builderCfg.tileZ, geom, cfg, solid);
         }
 
-        public RcBuilderResult Build(int tileX, int tileZ, IInputGeomProvider geom, RcConfig cfg, RcHeightfield solid, RcTelemetry ctx)
+        public RcBuilderResult Build(RcContext ctx, int tileX, int tileZ, IInputGeomProvider geom, RcConfig cfg, RcHeightfield solid)
         {
-            FilterHeightfield(solid, cfg, ctx);
-            RcCompactHeightfield chf = BuildCompactHeightfield(geom, cfg, ctx, solid);
+            FilterHeightfield(ctx, solid, cfg);
+            RcCompactHeightfield chf = BuildCompactHeightfield(ctx, geom, cfg, solid);
 
-            // Partition the heightfield so that we can use simple algorithm later
-            // to triangulate the walkable areas.
+            // Partition the heightfield so that we can use simple algorithm later to triangulate the walkable areas.
             // There are 3 partitioning methods, each with some pros and cons:
             // 1) Watershed partitioning
             //   - the classic Recast partitioning
             //   - creates the nicest tessellation
             //   - usually slowest
-            // - partitions the heightfield into nice regions without holes or
-            // overlaps
-            // - the are some corner cases where this method creates produces holes
-            // and overlaps
-            // - holes may appear when a small obstacles is close to large open area
-            // (triangulation can handle this)
-            // - overlaps may occur if you have narrow spiral corridors (i.e
-            // stairs), this make triangulation to fail
-            // * generally the best choice if you precompute the navmesh, use this
-            // if you have large open areas
-            // 2) Monotone partioning
+            //   - partitions the heightfield into nice regions without holes or overlaps
+            //   - the are some corner cases where this method creates produces holes and overlaps
+            //      - holes may appear when a small obstacles is close to large open area (triangulation can handle this)
+            //      - overlaps may occur if you have narrow spiral corridors (i.e stairs), this make triangulation to fail
+            //   * generally the best choice if you precompute the navmesh, use this if you have large open areas
+            // 2) Monotone partitioning
             //   - fastest
-            // - partitions the heightfield into regions without holes and overlaps
-            // (guaranteed)
-            // - creates long thin polygons, which sometimes causes paths with
-            // detours
+            //   - partitions the heightfield into regions without holes and overlaps (guaranteed)
+            //   - creates long thin polygons, which sometimes causes paths with detours
             //   * use this if you want fast navmesh generation
             // 3) Layer partitoining
             //   - quite fast
             //   - partitions the heighfield into non-overlapping regions
-            // - relies on the triangulation code to cope with holes (thus slower
-            // than monotone partitioning)
+            //   - relies on the triangulation code to cope with holes (thus slower than monotone partitioning)
             //   - produces better triangles than monotone partitioning
             //   - does not have the corner cases of watershed partitioning
-            // - can be slow and create a bit ugly tessellation (still better than
-            // monotone)
-            // if you have large open areas with small obstacles (not a problem if
-            // you use tiles)
-            // * good choice to use for tiled navmesh with medium and small sized
-            // tiles
+            //   - can be slow and create a bit ugly tessellation (still better than monotone)
+            //     if you have large open areas with small obstacles (not a problem if you use tiles)
+            //   * good choice to use for tiled navmesh with medium and small sized tiles
 
             if (cfg.Partition == RcPartitionType.WATERSHED.Value)
             {
-                // Prepare for region partitioning, by calculating distance field
-                // along the walkable surface.
+                // Prepare for region partitioning, by calculating distance field along the walkable surface.
                 RcRegions.BuildDistanceField(ctx, chf);
+                
                 // Partition the walkable surface into simple regions without holes.
                 RcRegions.BuildRegions(ctx, chf, cfg.MinRegionArea, cfg.MergeRegionArea);
             }
@@ -260,7 +247,7 @@ namespace DotRecast.Recast
         /*
          * Step 2. Filter walkable surfaces.
          */
-        private void FilterHeightfield(RcHeightfield solid, RcConfig cfg, RcTelemetry ctx)
+        private void FilterHeightfield(RcContext ctx, RcHeightfield solid, RcConfig cfg)
         {
             // Once all geometry is rasterized, we do initial pass of filtering to
             // remove unwanted overhangs caused by the conservative rasterization
@@ -284,7 +271,7 @@ namespace DotRecast.Recast
         /*
          * Step 3. Partition walkable surface to simple regions.
          */
-        private RcCompactHeightfield BuildCompactHeightfield(IInputGeomProvider geom, RcConfig cfg, RcTelemetry ctx, RcHeightfield solid)
+        private RcCompactHeightfield BuildCompactHeightfield(RcContext ctx, IInputGeomProvider geom, RcConfig cfg, RcHeightfield solid)
         {
             // Compact the heightfield so that it is faster to handle from now on.
             // This will result more cache coherent data as well as the neighbours
@@ -307,11 +294,13 @@ namespace DotRecast.Recast
 
         public RcHeightfieldLayerSet BuildLayers(IInputGeomProvider geom, RcBuilderConfig builderCfg)
         {
-            RcTelemetry ctx = new RcTelemetry();
-            RcHeightfield solid = RcVoxelizations.BuildSolidHeightfield(geom, builderCfg, ctx);
-            FilterHeightfield(solid, builderCfg.cfg, ctx);
-            RcCompactHeightfield chf = BuildCompactHeightfield(geom, builderCfg.cfg, ctx, solid);
-            return RcLayers.BuildHeightfieldLayers(ctx, chf, builderCfg.cfg.WalkableHeight);
+            RcContext ctx = new RcContext();
+            RcHeightfield solid = RcVoxelizations.BuildSolidHeightfield(ctx, geom, builderCfg);
+            FilterHeightfield(ctx, solid, builderCfg.cfg);
+            RcCompactHeightfield chf = BuildCompactHeightfield(ctx, geom, builderCfg.cfg, solid);
+            
+            RcLayers.BuildHeightfieldLayers(ctx, chf, builderCfg.cfg.BorderSize, builderCfg.cfg.WalkableHeight, out var lset);
+            return lset;
         }
     }
 }

src/DotRecast.Recast/RcBuilderConfig.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -37,16 +36,16 @@ namespace DotRecast.Recast
         public readonly int height;
 
         /** The minimum bounds of the field's AABB. [(x, y, z)] [Units: wu] **/
-        public readonly Vector3 bmin = new Vector3();
+        public readonly RcVec3f bmin = new RcVec3f();
 
         /** The maximum bounds of the field's AABB. [(x, y, z)] [Units: wu] **/
-        public readonly Vector3 bmax = new Vector3();
+        public readonly RcVec3f bmax = new RcVec3f();
 
-        public RcBuilderConfig(RcConfig cfg, Vector3 bmin, Vector3 bmax) : this(cfg, bmin, bmax, 0, 0)
+        public RcBuilderConfig(RcConfig cfg, RcVec3f bmin, RcVec3f bmax) : this(cfg, bmin, bmax, 0, 0)
         {
         }
 
-        public RcBuilderConfig(RcConfig cfg, Vector3 bmin, Vector3 bmax, int tileX, int tileZ)
+        public RcBuilderConfig(RcConfig cfg, RcVec3f bmin, RcVec3f bmax, int tileX, int tileZ)
         {
             this.tileX = tileX;
             this.tileZ = tileZ;

src/DotRecast.Recast/RcBuilderResult.cs

@@ -12,9 +12,9 @@ namespace DotRecast.Recast
         private readonly RcPolyMesh pmesh;
         private readonly RcPolyMeshDetail dmesh;
         private readonly RcHeightfield solid;
-        private readonly RcTelemetry telemetry;
+        private readonly RcContext _context;
 
-        public RcBuilderResult(int tileX, int tileZ, RcHeightfield solid, RcCompactHeightfield chf, RcContourSet cs, RcPolyMesh pmesh, RcPolyMeshDetail dmesh, RcTelemetry ctx)
+        public RcBuilderResult(int tileX, int tileZ, RcHeightfield solid, RcCompactHeightfield chf, RcContourSet cs, RcPolyMesh pmesh, RcPolyMeshDetail dmesh, RcContext ctx)
         {
             this.tileX = tileX;
             this.tileZ = tileZ;
@@ -23,7 +23,7 @@ namespace DotRecast.Recast
             this.cs = cs;
             this.pmesh = pmesh;
             this.dmesh = dmesh;
-            telemetry = ctx;
+            _context = ctx;
         }
 
         public RcPolyMesh GetMesh()
@@ -51,9 +51,9 @@ namespace DotRecast.Recast
             return solid;
         }
 
-        public RcTelemetry GetTelemetry()
+        public RcContext GetTelemetry()
         {
-            return telemetry;
+            return _context;
         }
     }
 }

src/DotRecast.Recast/RcCommons.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -99,14 +98,14 @@ namespace DotRecast.Recast
             // Calculate bounding box.
         }
 
-        public static void CalcGridSize(Vector3 bmin, Vector3 bmax, float cs, out int sizeX, out int sizeZ)
+        public static void CalcGridSize(RcVec3f bmin, RcVec3f bmax, float cs, out int sizeX, out int sizeZ)
         {
             sizeX = (int)((bmax.X - bmin.X) / cs + 0.5f);
             sizeZ = (int)((bmax.Z - bmin.Z) / cs + 0.5f);
         }
 
 
-        public static void CalcTileCount(Vector3 bmin, Vector3 bmax, float cs, int tileSizeX, int tileSizeZ, out int tw, out int td)
+        public static void CalcTileCount(RcVec3f bmin, RcVec3f bmax, float cs, int tileSizeX, int tileSizeZ, out int tw, out int td)
         {
             CalcGridSize(bmin, bmax, cs, out var gw, out var gd);
             tw = (gw + tileSizeX - 1) / tileSizeX;
@@ -120,11 +119,11 @@ namespace DotRecast.Recast
         /// See the #rcConfig documentation for more information on the configuration parameters.
         ///
         /// @see rcHeightfield, rcClearUnwalkableTriangles, rcRasterizeTriangles
-        public static int[] MarkWalkableTriangles(RcTelemetry ctx, float walkableSlopeAngle, float[] verts, int[] tris, int nt, RcAreaModification areaMod)
+        public static int[] MarkWalkableTriangles(RcContext ctx, float walkableSlopeAngle, float[] verts, int[] tris, int nt, RcAreaModification areaMod)
         {
             int[] areas = new int[nt];
             float walkableThr = MathF.Cos(walkableSlopeAngle / 180.0f * MathF.PI);
-            Vector3 norm = new Vector3();
+            RcVec3f norm = new RcVec3f();
             for (int i = 0; i < nt; ++i)
             {
                 int tri = i * 3;
@@ -137,12 +136,12 @@ namespace DotRecast.Recast
             return areas;
         }
 
-        public static void CalcTriNormal(float[] verts, int v0, int v1, int v2, ref Vector3 norm)
+        public static void CalcTriNormal(float[] verts, int v0, int v1, int v2, ref RcVec3f norm)
         {
             var e0 = RcVecUtils.Subtract(verts, v1 * 3, v0 * 3);
             var e1 = RcVecUtils.Subtract(verts, v2 * 3, v0 * 3);
-            norm = Vector3.Cross(e0, e1);
-            norm = Vector3.Normalize(norm);
+            norm = RcVec3f.Cross(e0, e1);
+            norm = RcVec3f.Normalize(norm);
         }
 
 
@@ -154,11 +153,11 @@ namespace DotRecast.Recast
         /// See the #rcConfig documentation for more information on the configuration parameters.
         ///
         /// @see rcHeightfield, rcClearUnwalkableTriangles, rcRasterizeTriangles
-        public static void ClearUnwalkableTriangles(RcTelemetry ctx, float walkableSlopeAngle, float[] verts, int nv, int[] tris, int nt, int[] areas)
+        public static void ClearUnwalkableTriangles(RcContext ctx, float walkableSlopeAngle, float[] verts, int nv, int[] tris, int nt, int[] areas)
         {
             float walkableThr = MathF.Cos(walkableSlopeAngle / 180.0f * MathF.PI);
 
-            Vector3 norm = new Vector3();
+            RcVec3f norm = new RcVec3f();
 
             for (int i = 0; i < nt; ++i)
             {

src/DotRecast.Recast/RcCompactHeightfield.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -51,10 +50,10 @@ namespace DotRecast.Recast
         public int maxRegions;
 
         /** The minimum bounds in world space. [(x, y, z)] */
-        public Vector3 bmin = new Vector3();
+        public RcVec3f bmin = new RcVec3f();
 
         /** The maximum bounds in world space. [(x, y, z)] */
-        public Vector3 bmax = new Vector3();
+        public RcVec3f bmax = new RcVec3f();
 
         /** The size of each cell. (On the xz-plane.) */
         public float cs;

src/DotRecast.Recast/RcCompacts.cs

@@ -30,10 +30,13 @@ namespace DotRecast.Recast
 
     public static class RcCompacts
     {
-        private const int MAX_LAYERS = RC_NOT_CONNECTED - 1;
-        private const int MAX_HEIGHT = RcConstants.SPAN_MAX_HEIGHT;
+        private const int MAX_HEIGHT = RcConstants.RC_SPAN_MAX_HEIGHT;
 
-        /// @par
+        /// @}
+        /// @name Compact Heightfield Functions
+        /// @see rcCompactHeightfield
+        /// @{
+        /// Builds a compact heightfield representing open space, from a heightfield representing solid space.
         ///
         /// This is just the beginning of the process of fully building a compact heightfield.
         /// Various filters may be applied, then the distance field and regions built.
@@ -42,31 +45,41 @@ namespace DotRecast.Recast
         /// See the #rcConfig documentation for more information on the configuration parameters.
         ///
         /// @see rcAllocCompactHeightfield, rcHeightfield, rcCompactHeightfield, rcConfig
-        public static RcCompactHeightfield BuildCompactHeightfield(RcTelemetry ctx, int walkableHeight, int walkableClimb, RcHeightfield hf)
+        /// @ingroup recast
+        /// 
+        /// @param[in,out]	context				The build context to use during the operation.
+        /// @param[in]		walkableHeight		Minimum floor to 'ceiling' height that will still allow the floor area 
+        /// 									to be considered walkable. [Limit: >= 3] [Units: vx]
+        /// @param[in]		walkableClimb		Maximum ledge height that is considered to still be traversable. 
+        /// 									[Limit: >=0] [Units: vx]
+        /// @param[in]		heightfield			The heightfield to be compacted.
+        /// @param[out]		compactHeightfield	The resulting compact heightfield. (Must be pre-allocated.)
+        /// @returns True if the operation completed successfully.
+        public static RcCompactHeightfield BuildCompactHeightfield(RcContext context, int walkableHeight, int walkableClimb, RcHeightfield heightfield)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_COMPACTHEIGHTFIELD);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_COMPACTHEIGHTFIELD);
 
-            RcCompactHeightfield chf = new RcCompactHeightfield();
-            int w = hf.width;
-            int h = hf.height;
-            int spanCount = GetHeightFieldSpanCount(hf);
+            int xSize = heightfield.width;
+            int zSize = heightfield.height;
+            int spanCount = GetHeightFieldSpanCount(context, heightfield);
 
             // Fill in header.
-            chf.width = w;
-            chf.height = h;
-            chf.borderSize = hf.borderSize;
-            chf.spanCount = spanCount;
-            chf.walkableHeight = walkableHeight;
-            chf.walkableClimb = walkableClimb;
-            chf.maxRegions = 0;
-            chf.bmin = hf.bmin;
-            chf.bmax = hf.bmax;
-            chf.bmax.Y += walkableHeight * hf.ch;
-            chf.cs = hf.cs;
-            chf.ch = hf.ch;
-            chf.cells = new RcCompactCell[w * h];
+            RcCompactHeightfield compactHeightfield = new RcCompactHeightfield();
+            compactHeightfield.width = xSize;
+            compactHeightfield.height = zSize;
+            compactHeightfield.borderSize = heightfield.borderSize;
+            compactHeightfield.spanCount = spanCount;
+            compactHeightfield.walkableHeight = walkableHeight;
+            compactHeightfield.walkableClimb = walkableClimb;
+            compactHeightfield.maxRegions = 0;
+            compactHeightfield.bmin = heightfield.bmin;
+            compactHeightfield.bmax = heightfield.bmax;
+            compactHeightfield.bmax.Y += walkableHeight * heightfield.ch;
+            compactHeightfield.cs = heightfield.cs;
+            compactHeightfield.ch = heightfield.ch;
+            compactHeightfield.cells = new RcCompactCell[xSize * zSize];
             //chf.spans = new RcCompactSpan[spanCount];
-            chf.areas = new int[spanCount];
+            compactHeightfield.areas = new int[spanCount];
 
             var tempSpans = Enumerable
                 .Range(0, spanCount)
@@ -74,80 +87,81 @@ namespace DotRecast.Recast
                 .ToArray();
 
             // Fill in cells and spans.
-            int idx = 0;
-            for (int y = 0; y < h; ++y)
+            int currentCellIndex = 0;
+            int numColumns = xSize * zSize;
+            for (int columnIndex = 0; columnIndex < numColumns; ++columnIndex)
             {
-                for (int x = 0; x < w; ++x)
-                {
-                    RcSpan s = hf.spans[x + y * w];
+                RcSpan span = heightfield.spans[columnIndex];
+
                 // If there are no spans at this cell, just leave the data to index=0, count=0.
-                    if (s == null)
+                if (span == null)
                     continue;
 
-                    int tmpIdx = idx;
+                int tmpIdx = currentCellIndex;
                 int tmpCount = 0;
-                    while (s != null)
+                for (; span != null; span = span.next)
                 {
-                        if (s.area != RC_NULL_AREA)
+                    if (span.area != RC_NULL_AREA)
                     {
-                            int bot = s.smax;
-                            int top = s.next != null ? (int)s.next.smin : MAX_HEIGHT;
-                            tempSpans[idx].y = Math.Clamp(bot, 0, MAX_HEIGHT);
-                            tempSpans[idx].h = Math.Clamp(top - bot, 0, MAX_HEIGHT);
-                            chf.areas[idx] = s.area;
-                            idx++;
+                        int bot = span.smax;
+                        int top = span.next != null ? (int)span.next.smin : MAX_HEIGHT;
+                        tempSpans[currentCellIndex].y = Math.Clamp(bot, 0, MAX_HEIGHT);
+                        tempSpans[currentCellIndex].h = Math.Clamp(top - bot, 0, MAX_HEIGHT);
+                        compactHeightfield.areas[currentCellIndex] = span.area;
+                        currentCellIndex++;
                         tmpCount++;
                     }
-
-                        s = s.next;
                 }
 
-                    chf.cells[x + y * w] = new RcCompactCell(tmpIdx, tmpCount);
-                }
+                compactHeightfield.cells[columnIndex] = new RcCompactCell(tmpIdx, tmpCount);
             }
 
             // Find neighbour connections.
-            int tooHighNeighbour = 0;
-            for (int y = 0; y < h; ++y)
+            const int MAX_LAYERS = RC_NOT_CONNECTED - 1;
+            int maxLayerIndex = 0;
+            int zStride = xSize; // for readability
+            for (int z = 0; z < zSize; ++z)
             {
-                for (int x = 0; x < w; ++x)
+                for (int x = 0; x < xSize; ++x)
                 {
-                    ref RcCompactCell c = ref chf.cells[x + y * w];
-                    for (int i = c.index, ni = c.index + c.count; i < ni; ++i)
+                    ref RcCompactCell cell = ref compactHeightfield.cells[x + z * zStride];
+                    for (int i = cell.index, ni = cell.index + cell.count; i < ni; ++i)
                     {
                         ref RcCompactSpanBuilder s = ref tempSpans[i];
 
                         for (int dir = 0; dir < 4; ++dir)
                         {
                             SetCon(s, dir, RC_NOT_CONNECTED);
-                            int nx = x + GetDirOffsetX(dir);
-                            int ny = y + GetDirOffsetY(dir);
+                            int neighborX = x + GetDirOffsetX(dir);
+                            int neighborZ = z + GetDirOffsetY(dir);
                             // First check that the neighbour cell is in bounds.
-                            if (nx < 0 || ny < 0 || nx >= w || ny >= h)
-                                continue;
-
-                            // Iterate over all neighbour spans and check if any of the is
-                            // accessible from current cell.
-                            ref RcCompactCell nc = ref chf.cells[nx + ny * w];
-                            for (int k = nc.index, nk = nc.index + nc.count; k < nk; ++k)
+                            if (neighborX < 0 || neighborZ < 0 || neighborX >= xSize || neighborZ >= zSize)
                             {
-                                ref RcCompactSpanBuilder ns = ref tempSpans[k];
-                                int bot = Math.Max(s.y, ns.y);
-                                int top = Math.Min(s.y + s.h, ns.y + ns.h);
-
-                                // Check that the gap between the spans is walkable,
-                                // and that the climb height between the gaps is not too high.
-                                if ((top - bot) >= walkableHeight && MathF.Abs(ns.y - s.y) <= walkableClimb)
-                                {
-                                    // Mark direction as walkable.
-                                    int lidx = k - nc.index;
-                                    if (lidx < 0 || lidx > MAX_LAYERS)
-                                    {
-                                        tooHighNeighbour = Math.Max(tooHighNeighbour, lidx);
                                 continue;
                             }
 
-                                    SetCon(s, dir, lidx);
+                            // Iterate over all neighbour spans and check if any of the is
+                            // accessible from current cell.
+                            ref RcCompactCell neighborCell = ref compactHeightfield.cells[neighborX + neighborZ * xSize];
+                            for (int k = neighborCell.index, nk = neighborCell.index + neighborCell.count; k < nk; ++k)
+                            {
+                                ref RcCompactSpanBuilder neighborSpan = ref tempSpans[k];
+                                int bot = Math.Max(s.y, neighborSpan.y);
+                                int top = Math.Min(s.y + s.h, neighborSpan.y + neighborSpan.h);
+
+                                // Check that the gap between the spans is walkable,
+                                // and that the climb height between the gaps is not too high.
+                                if ((top - bot) >= walkableHeight && MathF.Abs(neighborSpan.y - s.y) <= walkableClimb)
+                                {
+                                    // Mark direction as walkable.
+                                    int layerIndex = k - neighborCell.index;
+                                    if (layerIndex < 0 || layerIndex > MAX_LAYERS)
+                                    {
+                                        maxLayerIndex = Math.Max(maxLayerIndex, layerIndex);
+                                        continue;
+                                    }
+
+                                    SetCon(s, dir, layerIndex);
                                     break;
                                 }
                             }
@@ -156,29 +170,31 @@ namespace DotRecast.Recast
                 }
             }
 
-            if (tooHighNeighbour > MAX_LAYERS)
+            if (maxLayerIndex > MAX_LAYERS)
             {
-                throw new Exception("rcBuildCompactHeightfield: Heightfield has too many layers " + tooHighNeighbour
-                                                                                                  + " (max: " + MAX_LAYERS + ")");
+                throw new Exception($"rcBuildCompactHeightfield: Heightfield has too many layers {maxLayerIndex} (max: {MAX_LAYERS})");
             }
 
-            chf.spans = tempSpans.Select(x => x.Build()).ToArray();
+            compactHeightfield.spans = tempSpans.Select(x => x.Build()).ToArray();
 
-            return chf;
+            return compactHeightfield;
         }
 
-        private static int GetHeightFieldSpanCount(RcHeightfield hf)
+        /// Returns the number of spans contained in the specified heightfield.
+        ///  @ingroup recast
+        ///  @param[in,out]	context		The build context to use during the operation.
+        ///  @param[in]		heightfield	An initialized heightfield.
+        ///  @returns The number of spans in the heightfield.
+        private static int GetHeightFieldSpanCount(RcContext context, RcHeightfield heightfield)
         {
-            int w = hf.width;
-            int h = hf.height;
+            int numCols = heightfield.width * heightfield.height;
             int spanCount = 0;
-            for (int y = 0; y < h; ++y)
+            for (int columnIndex = 0; columnIndex < numCols; ++columnIndex)
             {
-                for (int x = 0; x < w; ++x)
+                for (RcSpan span = heightfield.spans[columnIndex]; span != null; span = span.next)
                 {
-                    for (RcSpan s = hf.spans[x + y * w]; s != null; s = s.next)
+                    if (span.area != RC_NULL_AREA)
                     {
-                        if (s.area != RC_NULL_AREA)
                         spanCount++;
                     }
                 }

src/DotRecast.Recast/RcConstants.cs

@@ -37,10 +37,14 @@ namespace DotRecast.Recast
         public const int RC_NOT_CONNECTED = 0x3f;
         
         /// Defines the number of bits allocated to rcSpan::smin and rcSpan::smax.
-        public const int SPAN_HEIGHT_BITS = 20;
+        public const int RC_SPAN_HEIGHT_BITS = 20;
 
         /// Defines the maximum value for rcSpan::smin and rcSpan::smax.
-        public const int SPAN_MAX_HEIGHT = (1 << SPAN_HEIGHT_BITS) - 1;
+        public const int RC_SPAN_MAX_HEIGHT = (1 << RC_SPAN_HEIGHT_BITS) - 1;
+
+        /// The number of spans allocated per span spool.
+        /// @see rcSpanPool
+        public const int RC_SPANS_PER_POOL = 2048;
         
         /// Heighfield border flag.
         /// If a heightfield region ID has this bit set, then the region is a border

src/DotRecast.Recast/RcContourSet.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -31,10 +30,10 @@ namespace DotRecast.Recast
         public List<RcContour> conts = new List<RcContour>();
 
         /** The minimum bounds in world space. [(x, y, z)] */
-        public Vector3 bmin = new Vector3();
+        public RcVec3f bmin = new RcVec3f();
 
         /** The maximum bounds in world space. [(x, y, z)] */
-        public Vector3 bmax = new Vector3();
+        public RcVec3f bmax = new RcVec3f();
 
         /** The size of each cell. (On the xz-plane.) */
         public float cs;

src/DotRecast.Recast/RcContours.cs

@@ -614,7 +614,7 @@ namespace DotRecast.Recast
             return new int[] { minx, minz, leftmost };
         }
 
-        private static void MergeRegionHoles(RcTelemetry ctx, RcContourRegion region)
+        private static void MergeRegionHoles(RcContext ctx, RcContourRegion region)
         {
             // Sort holes from left to right.
             for (int i = 0; i < region.nholes; i++)
@@ -715,7 +715,7 @@ namespace DotRecast.Recast
         /// See the #rcConfig documentation for more information on the configuration parameters.
         ///
         /// @see rcAllocContourSet, rcCompactHeightfield, rcContourSet, rcConfig
-        public static RcContourSet BuildContours(RcTelemetry ctx, RcCompactHeightfield chf, float maxError, int maxEdgeLen,
+        public static RcContourSet BuildContours(RcContext ctx, RcCompactHeightfield chf, float maxError, int maxEdgeLen,
             int buildFlags)
         {
             int w = chf.width;

src/DotRecast.Recast/RcDirtyEntry.cs

@@ -0,0 +1,17 @@
+namespace DotRecast.Recast
+{
+    // Struct to keep track of entries in the region table that have been changed.
+    public readonly struct RcDirtyEntry
+    {
+        public readonly int index;
+        public readonly int region;
+        public readonly int distance2;
+
+        public RcDirtyEntry(int tempIndex, int tempRegion, int tempDistance2)
+        {
+            index = tempIndex;
+            region = tempRegion;
+            distance2 = tempDistance2;
+        }
+    }
+}

src/DotRecast.Recast/RcFilledVolumeRasterization.cs

@@ -20,7 +20,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using static DotRecast.Recast.RcConstants;
 
 
@@ -31,7 +30,7 @@ namespace DotRecast.Recast
         private const float EPSILON = 0.00001f;
         private static readonly int[] BOX_EDGES = new[] { 0, 1, 0, 2, 0, 4, 1, 3, 1, 5, 2, 3, 2, 6, 3, 7, 4, 5, 4, 6, 5, 7, 6, 7 };
 
-        public static void RasterizeSphere(RcHeightfield hf, Vector3 center, float radius, int area, int flagMergeThr, RcTelemetry ctx)
+        public static void RasterizeSphere(RcHeightfield hf, RcVec3f center, float radius, int area, int flagMergeThr, RcContext ctx)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_SPHERE);
             float[] bounds =
@@ -43,7 +42,7 @@ namespace DotRecast.Recast
                 rectangle => IntersectSphere(rectangle, center, radius * radius));
         }
 
-        public static void RasterizeCapsule(RcHeightfield hf, Vector3 start, Vector3 end, float radius, int area, int flagMergeThr, RcTelemetry ctx)
+        public static void RasterizeCapsule(RcHeightfield hf, RcVec3f start, RcVec3f end, float radius, int area, int flagMergeThr, RcContext ctx)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_CAPSULE);
             float[] bounds =
@@ -52,12 +51,12 @@ namespace DotRecast.Recast
                 Math.Min(start.Z, end.Z) - radius, Math.Max(start.X, end.X) + radius, Math.Max(start.Y, end.Y) + radius,
                 Math.Max(start.Z, end.Z) + radius
             };
-            Vector3 axis = new Vector3(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
+            RcVec3f axis = new RcVec3f(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
             RasterizationFilledShape(hf, bounds, area, flagMergeThr,
                 rectangle => IntersectCapsule(rectangle, start, end, axis, radius * radius));
         }
 
-        public static void RasterizeCylinder(RcHeightfield hf, Vector3 start, Vector3 end, float radius, int area, int flagMergeThr, RcTelemetry ctx)
+        public static void RasterizeCylinder(RcHeightfield hf, RcVec3f start, RcVec3f end, float radius, int area, int flagMergeThr, RcContext ctx)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_CYLINDER);
             float[] bounds =
@@ -66,23 +65,23 @@ namespace DotRecast.Recast
                 Math.Min(start.Z, end.Z) - radius, Math.Max(start.X, end.X) + radius, Math.Max(start.Y, end.Y) + radius,
                 Math.Max(start.Z, end.Z) + radius
             };
-            Vector3 axis = new Vector3(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
+            RcVec3f axis = new RcVec3f(end.X - start.X, end.Y - start.Y, end.Z - start.Z);
             RasterizationFilledShape(hf, bounds, area, flagMergeThr,
                 rectangle => IntersectCylinder(rectangle, start, end, axis, radius * radius));
         }
 
-        public static void RasterizeBox(RcHeightfield hf, Vector3 center, Vector3[] halfEdges, int area, int flagMergeThr, RcTelemetry ctx)
+        public static void RasterizeBox(RcHeightfield hf, RcVec3f center, RcVec3f[] halfEdges, int area, int flagMergeThr, RcContext ctx)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_BOX);
-            Vector3[] normals =
+            RcVec3f[] normals =
             {
-                new Vector3(halfEdges[0].X, halfEdges[0].Y, halfEdges[0].Z),
-                new Vector3(halfEdges[1].X, halfEdges[1].Y, halfEdges[1].Z),
-                new Vector3(halfEdges[2].X, halfEdges[2].Y, halfEdges[2].Z),
+                new RcVec3f(halfEdges[0].X, halfEdges[0].Y, halfEdges[0].Z),
+                new RcVec3f(halfEdges[1].X, halfEdges[1].Y, halfEdges[1].Z),
+                new RcVec3f(halfEdges[2].X, halfEdges[2].Y, halfEdges[2].Z),
             };
-            normals[0] = Vector3.Normalize(normals[0]);
-            normals[1] = Vector3.Normalize(normals[1]);
-            normals[2] = Vector3.Normalize(normals[2]);
+            normals[0] = RcVec3f.Normalize(normals[0]);
+            normals[1] = RcVec3f.Normalize(normals[1]);
+            normals[2] = RcVec3f.Normalize(normals[2]);
 
             float[] vertices = new float[8 * 3];
             float[] bounds = new float[]
@@ -121,7 +120,7 @@ namespace DotRecast.Recast
             RasterizationFilledShape(hf, bounds, area, flagMergeThr, rectangle => IntersectBox(rectangle, vertices, planes));
         }
 
-        public static void RasterizeConvex(RcHeightfield hf, float[] vertices, int[] triangles, int area, int flagMergeThr, RcTelemetry ctx)
+        public static void RasterizeConvex(RcHeightfield hf, float[] vertices, int[] triangles, int area, int flagMergeThr, RcContext ctx)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_CONVEX);
             float[] bounds = new float[] { vertices[0], vertices[1], vertices[2], vertices[0], vertices[1], vertices[2] };
@@ -222,8 +221,8 @@ namespace DotRecast.Recast
                         int smax = (int)MathF.Ceiling((h[1] - hf.bmin.Y) * ich);
                         if (smin != smax)
                         {
-                            int ismin = Math.Clamp(smin, 0, SPAN_MAX_HEIGHT);
-                            int ismax = Math.Clamp(smax, ismin + 1, SPAN_MAX_HEIGHT);
+                            int ismin = Math.Clamp(smin, 0, RC_SPAN_MAX_HEIGHT);
+                            int ismax = Math.Clamp(smax, ismin + 1, RC_SPAN_MAX_HEIGHT);
                             RcRasterizations.AddSpan(hf, x, z, ismin, ismax, area, flagMergeThr);
                         }
                     }
@@ -231,7 +230,7 @@ namespace DotRecast.Recast
             }
         }
 
-        private static float[] IntersectSphere(float[] rectangle, Vector3 center, float radiusSqr)
+        private static float[] IntersectSphere(float[] rectangle, RcVec3f center, float radiusSqr)
         {
             float x = Math.Max(rectangle[0], Math.Min(center.X, rectangle[2]));
             float y = rectangle[4];
@@ -266,7 +265,7 @@ namespace DotRecast.Recast
             return new float[] { y + tmin, y + tmax };
         }
 
-        private static float[] IntersectCapsule(float[] rectangle, Vector3 start, Vector3 end, Vector3 axis, float radiusSqr)
+        private static float[] IntersectCapsule(float[] rectangle, RcVec3f start, RcVec3f end, RcVec3f axis, float radiusSqr)
         {
             float[] s = MergeIntersections(IntersectSphere(rectangle, start, radiusSqr), IntersectSphere(rectangle, end, radiusSqr));
             float axisLen2dSqr = axis.X * axis.X + axis.Z * axis.Z;
@@ -278,14 +277,14 @@ namespace DotRecast.Recast
             return s;
         }
 
-        private static float[] IntersectCylinder(float[] rectangle, Vector3 start, Vector3 end, Vector3 axis, float radiusSqr)
+        private static float[] IntersectCylinder(float[] rectangle, RcVec3f start, RcVec3f end, RcVec3f axis, float radiusSqr)
         {
             float[] s = MergeIntersections(
-                RayCylinderIntersection(new Vector3(
+                RayCylinderIntersection(new RcVec3f(
                     Math.Clamp(start.X, rectangle[0], rectangle[2]), rectangle[4],
                     Math.Clamp(start.Z, rectangle[1], rectangle[3])
                 ), start, axis, radiusSqr),
-                RayCylinderIntersection(new Vector3(
+                RayCylinderIntersection(new RcVec3f(
                     Math.Clamp(end.X, rectangle[0], rectangle[2]), rectangle[4],
                     Math.Clamp(end.Z, rectangle[1], rectangle[3])
                 ), start, axis, radiusSqr));
@@ -297,16 +296,16 @@ namespace DotRecast.Recast
 
             if (axis.Y * axis.Y > EPSILON)
             {
-                Vector3[] rectangleOnStartPlane = new Vector3[4];
-                Vector3[] rectangleOnEndPlane = new Vector3[4];
-                float ds = Vector3.Dot(axis, start);
-                float de = Vector3.Dot(axis, end);
+                RcVec3f[] rectangleOnStartPlane = new RcVec3f[4];
+                RcVec3f[] rectangleOnEndPlane = new RcVec3f[4];
+                float ds = RcVec3f.Dot(axis, start);
+                float de = RcVec3f.Dot(axis, end);
                 for (int i = 0; i < 4; i++)
                 {
                     float x = rectangle[(i + 1) & 2];
                     float z = rectangle[(i & 2) + 1];
-                    Vector3 a = new Vector3(x, rectangle[4], z);
-                    float dotAxisA = Vector3.Dot(axis, a);
+                    RcVec3f a = new RcVec3f(x, rectangle[4], z);
+                    float dotAxisA = RcVec3f.Dot(axis, a);
                     float t = (ds - dotAxisA) / axis.Y;
                     rectangleOnStartPlane[i].X = x;
                     rectangleOnStartPlane[i].Y = rectangle[4] + t;
@@ -327,23 +326,23 @@ namespace DotRecast.Recast
             return s;
         }
 
-        private static float[] CylinderCapIntersection(Vector3 start, float radiusSqr, float[] s, int i, Vector3[] rectangleOnPlane)
+        private static float[] CylinderCapIntersection(RcVec3f start, float radiusSqr, float[] s, int i, RcVec3f[] rectangleOnPlane)
         {
             int j = (i + 1) % 4;
             // Ray against sphere intersection
-            var m = new Vector3(
+            var m = new RcVec3f(
                 rectangleOnPlane[i].X - start.X,
                 rectangleOnPlane[i].Y - start.Y,
                 rectangleOnPlane[i].Z - start.Z
             );
-            var d = new Vector3(
+            var d = new RcVec3f(
                 rectangleOnPlane[j].X - rectangleOnPlane[i].X,
                 rectangleOnPlane[j].Y - rectangleOnPlane[i].Y,
                 rectangleOnPlane[j].Z - rectangleOnPlane[i].Z
             );
-            float dl = Vector3.Dot(d, d);
-            float b = Vector3.Dot(m, d) / dl;
-            float c = (Vector3.Dot(m, m) - radiusSqr) / dl;
+            float dl = RcVec3f.Dot(d, d);
+            float b = RcVec3f.Dot(m, d) / dl;
+            float c = (RcVec3f.Dot(m, m) - radiusSqr) / dl;
             float discr = b * b - c;
             if (discr > EPSILON)
             {
@@ -364,7 +363,7 @@ namespace DotRecast.Recast
             return s;
         }
 
-        private static float[] SlabsCylinderIntersection(float[] rectangle, Vector3 start, Vector3 end, Vector3 axis, float radiusSqr, float[] s)
+        private static float[] SlabsCylinderIntersection(float[] rectangle, RcVec3f start, RcVec3f end, RcVec3f axis, float radiusSqr, float[] s)
         {
             if (Math.Min(start.X, end.X) < rectangle[0])
             {
@@ -389,42 +388,42 @@ namespace DotRecast.Recast
             return s;
         }
 
-        private static float[] XSlabCylinderIntersection(float[] rectangle, Vector3 start, Vector3 axis, float radiusSqr, float x)
+        private static float[] XSlabCylinderIntersection(float[] rectangle, RcVec3f start, RcVec3f axis, float radiusSqr, float x)
         {
             return RayCylinderIntersection(XSlabRayIntersection(rectangle, start, axis, x), start, axis, radiusSqr);
         }
 
-        private static Vector3 XSlabRayIntersection(float[] rectangle, Vector3 start, Vector3 direction, float x)
+        private static RcVec3f XSlabRayIntersection(float[] rectangle, RcVec3f start, RcVec3f direction, float x)
         {
             // 2d intersection of plane and segment
             float t = (x - start.X) / direction.X;
             float z = Math.Clamp(start.Z + t * direction.Z, rectangle[1], rectangle[3]);
-            return new Vector3(x, rectangle[4], z);
+            return new RcVec3f(x, rectangle[4], z);
         }
 
-        private static float[] ZSlabCylinderIntersection(float[] rectangle, Vector3 start, Vector3 axis, float radiusSqr, float z)
+        private static float[] ZSlabCylinderIntersection(float[] rectangle, RcVec3f start, RcVec3f axis, float radiusSqr, float z)
         {
             return RayCylinderIntersection(ZSlabRayIntersection(rectangle, start, axis, z), start, axis, radiusSqr);
         }
 
-        private static Vector3 ZSlabRayIntersection(float[] rectangle, Vector3 start, Vector3 direction, float z)
+        private static RcVec3f ZSlabRayIntersection(float[] rectangle, RcVec3f start, RcVec3f direction, float z)
         {
             // 2d intersection of plane and segment
             float t = (z - start.Z) / direction.Z;
             float x = Math.Clamp(start.X + t * direction.X, rectangle[0], rectangle[2]);
-            return new Vector3(x, rectangle[4], z);
+            return new RcVec3f(x, rectangle[4], z);
         }
 
         // Based on Christer Ericsons's "Real-Time Collision Detection"
-        private static float[] RayCylinderIntersection(Vector3 point, Vector3 start, Vector3 axis, float radiusSqr)
+        private static float[] RayCylinderIntersection(RcVec3f point, RcVec3f start, RcVec3f axis, float radiusSqr)
         {
-            Vector3 d = axis;
-            Vector3 m = new Vector3(point.X - start.X, point.Y - start.Y, point.Z - start.Z);
+            RcVec3f d = axis;
+            RcVec3f m = new RcVec3f(point.X - start.X, point.Y - start.Y, point.Z - start.Z);
             // float[] n = { 0, 1, 0 };
-            float md = Vector3.Dot(m, d);
+            float md = RcVec3f.Dot(m, d);
             // float nd = Dot(n, d);
             float nd = axis.Y;
-            float dd = Vector3.Dot(d, d);
+            float dd = RcVec3f.Dot(d, d);
 
             // float nn = Dot(n, n);
             float nn = 1;
@@ -432,7 +431,7 @@ namespace DotRecast.Recast
             float mn = m.Y;
             // float a = dd * nn - nd * nd;
             float a = dd - nd * nd;
-            float k = Vector3.Dot(m, m) - radiusSqr;
+            float k = RcVec3f.Dot(m, m) - radiusSqr;
             float c = dd * k - md * md;
             if (MathF.Abs(a) < EPSILON)
             {
@@ -517,7 +516,7 @@ namespace DotRecast.Recast
             }
 
             // check intersection with rays starting in rectangle vertices
-            var point = new Vector3(0, rectangle[1], 0);
+            var point = new RcVec3f(0, rectangle[1], 0);
             for (int i = 0; i < 4; i++)
             {
                 point.X = ((i & 1) == 0) ? rectangle[0] : rectangle[2];
@@ -670,7 +669,7 @@ namespace DotRecast.Recast
                 }
 
                 // rectangle vertex
-                var point = new Vector3(0, rectangle[1], 0);
+                var point = new RcVec3f(0, rectangle[1], 0);
                 for (int i = 0; i < 4; i++)
                 {
                     point.X = ((i & 1) == 0) ? rectangle[0] : rectangle[2];
@@ -727,7 +726,7 @@ namespace DotRecast.Recast
             return false;
         }
 
-        private static bool RayTriangleIntersection(Vector3 point, int plane, float[][] planes, out float y)
+        private static bool RayTriangleIntersection(RcVec3f point, int plane, float[][] planes, out float y)
         {
             y = 0.0f;
             float t = (planes[plane][3] - RcVecUtils.Dot(planes[plane], point)) / planes[plane][1];
@@ -774,7 +773,7 @@ namespace DotRecast.Recast
             return dx * dx + dy * dy + dz * dz;
         }
 
-        private static bool OverlapBounds(Vector3 amin, Vector3 amax, float[] bounds)
+        private static bool OverlapBounds(RcVec3f amin, RcVec3f amax, float[] bounds)
         {
             bool overlap = true;
             overlap = (amin.X > bounds[3] || amax.X < bounds[0]) ? false : overlap;

src/DotRecast.Recast/RcFilters.cs

@@ -28,172 +28,218 @@ namespace DotRecast.Recast
 
     public static class RcFilters
     {
-        /// @par
+        /// Marks non-walkable spans as walkable if their maximum is within @p walkableClimb of the span below them.
         ///
-        /// Allows the formation of walkable regions that will flow over low lying
-        /// objects such as curbs, and up structures such as stairways.
+        /// This removes small obstacles that the agent would be able to walk over such as curbs, and also allows agents to move up structures such as stairs.
+        /// This removes small obstacles and rasterization artifacts that the agent would be able to walk over
+        /// such as curbs.  It also allows agents to move up terraced structures like stairs.
         /// 
-        /// Two neighboring spans are walkable if: <tt>RcAbs(currentSpan.smax - neighborSpan.smax) < walkableClimb</tt>
+        /// Obstacle spans are marked walkable if: <tt>obstacleSpan.smax - walkableSpan.smax < walkableClimb</tt>
         /// 
-        /// @warning Will override the effect of #rcFilterLedgeSpans. So if both filters are used, call
-        /// #rcFilterLedgeSpans after calling this filter.
+        /// @warning Will override the effect of #rcFilterLedgeSpans.  If both filters are used, call #rcFilterLedgeSpans only after applying this filter.
         ///
         /// @see rcHeightfield, rcConfig
-        public static void FilterLowHangingWalkableObstacles(RcTelemetry ctx, int walkableClimb, RcHeightfield solid)
+        /// 
+        /// @ingroup recast
+        /// @param[in,out]	context			The build context to use during the operation.
+        /// @param[in]		walkableClimb	Maximum ledge height that is considered to still be traversable. 
+        /// 								[Limit: >=0] [Units: vx]
+        /// @param[in,out]	heightfield		A fully built heightfield.  (All spans have been added.)
+        public static void FilterLowHangingWalkableObstacles(RcContext context, int walkableClimb, RcHeightfield heightfield)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_LOW_OBSTACLES);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_LOW_OBSTACLES);
 
-            int w = solid.width;
-            int h = solid.height;
+            int xSize = heightfield.width;
+            int zSize = heightfield.height;
 
-            for (int y = 0; y < h; ++y)
+            for (int z = 0; z < zSize; ++z)
             {
-                for (int x = 0; x < w; ++x)
+                for (int x = 0; x < xSize; ++x)
                 {
-                    RcSpan ps = null;
-                    bool previousWalkable = false;
-                    int previousArea = RC_NULL_AREA;
+                    RcSpan previousSpan = null;
+                    bool previousWasWalkable = false;
+                    int previousAreaID = RC_NULL_AREA;
 
-                    for (RcSpan s = solid.spans[x + y * w]; s != null; ps = s, s = s.next)
+                    // For each span in the column...
+                    for (RcSpan span = heightfield.spans[x + z * xSize]; span != null; previousSpan = span, span = span.next)
                     {
-                        bool walkable = s.area != RC_NULL_AREA;
-                        // If current span is not walkable, but there is walkable
-                        // span just below it, mark the span above it walkable too.
-                        if (!walkable && previousWalkable)
+                        bool walkable = span.area != RC_NULL_AREA;
+                        // If current span is not walkable, but there is walkable span just below it and the height difference
+                        // is small enough for the agent to walk over, mark the current span as walkable too.
+                        if (!walkable && previousWasWalkable && span.smax - previousSpan.smax <= walkableClimb)
                         {
-                            if (MathF.Abs(s.smax - ps.smax) <= walkableClimb)
-                                s.area = previousArea;
+                            span.area = previousAreaID;
                         }
 
-                        // Copy walkable flag so that it cannot propagate
-                        // past multiple non-walkable objects.
-                        previousWalkable = walkable;
-                        previousArea = s.area;
+                        // Copy the original walkable value regardless of whether we changed it.
+                        // This prevents multiple consecutive non-walkable spans from being erroneously marked as walkable.
+                        previousWasWalkable = walkable;
+                        previousAreaID = span.area;
                     }
                 }
             }
         }
 
-        /// @par
+        /// Marks spans that are ledges as not-walkable.
         ///
         /// A ledge is a span with one or more neighbors whose maximum is further away than @p walkableClimb
         /// from the current span's maximum.
         /// This method removes the impact of the overestimation of conservative voxelization 
         /// so the resulting mesh will not have regions hanging in the air over ledges.
         /// 
-        /// A span is a ledge if: <tt>RcAbs(currentSpan.smax - neighborSpan.smax) > walkableClimb</tt>
+        /// A span is a ledge if: <tt>rcAbs(currentSpan.smax - neighborSpan.smax) > walkableClimb</tt>
         /// 
         /// @see rcHeightfield, rcConfig
-        public static void FilterLedgeSpans(RcTelemetry ctx, int walkableHeight, int walkableClimb, RcHeightfield solid)
+        /// 
+        /// @ingroup recast
+        /// @param[in,out]	context				The build context to use during the operation.
+        /// @param[in]		walkableHeight	Minimum floor to 'ceiling' height that will still allow the floor area to 
+        /// 								be considered walkable. [Limit: >= 3] [Units: vx]
+        /// @param[in]		walkableClimb	Maximum ledge height that is considered to still be traversable. 
+        /// 								[Limit: >=0] [Units: vx]
+        /// @param[in,out]	heightfield			A fully built heightfield.  (All spans have been added.)
+        public static void FilterLedgeSpans(RcContext context, int walkableHeight, int walkableClimb, RcHeightfield heightfield)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_BORDER);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_BORDER);
 
-            int w = solid.width;
-            int h = solid.height;
+            int xSize = heightfield.width;
+            int zSize = heightfield.height;
 
-            // Mark border spans.
-            for (int y = 0; y < h; ++y)
+            // Mark spans that are adjacent to a ledge as unwalkable..
+            for (int z = 0; z < zSize; ++z)
             {
-                for (int x = 0; x < w; ++x)
+                for (int x = 0; x < xSize; ++x)
                 {
-                    for (RcSpan s = solid.spans[x + y * w]; s != null; s = s.next)
+                    for (RcSpan span = heightfield.spans[x + z * xSize]; span != null; span = span.next)
+                    {
+                        // Skip non-walkable spans.
+                        if (span.area == RC_NULL_AREA)
                         {
-                        // Skip non walkable spans.
-                        if (s.area == RC_NULL_AREA)
                             continue;
+                        }
 
-                        int bot = (s.smax);
-                        int top = s.next != null ? s.next.smin : SPAN_MAX_HEIGHT;
+                        int floor = (span.smax);
+                        int ceiling = span.next != null ? span.next.smin : RC_SPAN_MAX_HEIGHT;
 
-                        // Find neighbours minimum height.
-                        int minh = SPAN_MAX_HEIGHT;
+                        // The difference between this walkable area and the lowest neighbor walkable area.
+                        // This is the difference between the current span and all neighbor spans that have
+                        // enough space for an agent to move between, but not accounting at all for surface slope.
+                        int lowestNeighborFloorDifference = RC_SPAN_MAX_HEIGHT;
 
                         // Min and max height of accessible neighbours.
-                        int asmin = s.smax;
-                        int asmax = s.smax;
+                        int lowestTraversableNeighborFloor = span.smax;
+                        int highestTraversableNeighborFloor = span.smax;
 
-                        for (int dir = 0; dir < 4; ++dir)
+                        for (int direction = 0; direction < 4; ++direction)
                         {
-                            int dx = x + GetDirOffsetX(dir);
-                            int dy = y + GetDirOffsetY(dir);
+                            int neighborX = x + GetDirOffsetX(direction);
+                            int neighborZ = z + GetDirOffsetY(direction);
+
                             // Skip neighbours which are out of bounds.
-                            if (dx < 0 || dy < 0 || dx >= w || dy >= h)
+                            if (neighborX < 0 || neighborZ < 0 || neighborX >= xSize || neighborZ >= zSize)
                             {
-                                minh = Math.Min(minh, -walkableClimb - bot);
+                                lowestNeighborFloorDifference = (-walkableClimb - 1);
+                                break;
+                            }
+
+                            RcSpan neighborSpan = heightfield.spans[neighborX + neighborZ * xSize];
+
+                            // The most we can step down to the neighbor is the walkableClimb distance.
+                            // Start with the area under the neighbor span                            
+                            int neighborCeiling = neighborSpan != null ? neighborSpan.smin : RC_SPAN_MAX_HEIGHT;
+
+                            // Skip neightbour if the gap between the spans is too small.
+                            if (Math.Min(ceiling, neighborCeiling) - floor >= walkableHeight)
+                            {
+                                lowestNeighborFloorDifference = (-walkableClimb - 1);
+                                break;
+                            }
+
+                            // For each span in the neighboring column...
+                            for (; neighborSpan != null; neighborSpan = neighborSpan.next)
+                            {
+                                int neighborFloor = neighborSpan.smax;
+                                neighborCeiling = neighborSpan.next != null ? neighborSpan.next.smin : RC_SPAN_MAX_HEIGHT;
+
+                                // Only consider neighboring areas that have enough overlap to be potentially traversable.
+                                if (Math.Min(ceiling, neighborCeiling) - Math.Max(floor, neighborFloor) < walkableHeight)
+                                {
+                                    // No space to traverse between them.
                                     continue;
                                 }
 
-                            // From minus infinity to the first span.
-                            RcSpan ns = solid.spans[dx + dy * w];
-                            int nbot = -walkableClimb;
-                            int ntop = ns != null ? ns.smin : SPAN_MAX_HEIGHT;
-                            // Skip neightbour if the gap between the spans is too small.
-                            if (Math.Min(top, ntop) - Math.Max(bot, nbot) > walkableHeight)
-                                minh = Math.Min(minh, nbot - bot);
+                                int neighborFloorDifference = neighborFloor - floor;
+                                lowestNeighborFloorDifference = Math.Min(lowestNeighborFloorDifference, neighborFloorDifference);
 
-                            // Rest of the spans.
-                            for (ns = solid.spans[dx + dy * w]; ns != null; ns = ns.next)
+                                // Find min/max accessible neighbor height.
+                                // Only consider neighbors that are at most walkableClimb away.
+                                if (MathF.Abs(neighborFloorDifference) <= walkableClimb)
                                 {
-                                nbot = ns.smax;
-                                ntop = ns.next != null ? ns.next.smin : SPAN_MAX_HEIGHT;
-                                // Skip neightbour if the gap between the spans is too small.
-                                if (Math.Min(top, ntop) - Math.Max(bot, nbot) > walkableHeight)
+                                    // There is space to move to the neighbor cell and the slope isn't too much.
+                                    lowestTraversableNeighborFloor = Math.Min(lowestTraversableNeighborFloor, neighborFloor);
+                                    highestTraversableNeighborFloor = Math.Max(highestTraversableNeighborFloor, neighborFloor);
+                                }
+                                else if (neighborFloorDifference < -walkableClimb)
                                 {
-                                    minh = Math.Min(minh, nbot - bot);
+                                    // We already know this will be considered a ledge span so we can early-out
+                                    break;
+                                }
+                            }
+                        }
 
-                                    // Find min/max accessible neighbour height.
-                                    if (MathF.Abs(nbot - bot) <= walkableClimb)
+                        // The current span is close to a ledge if the magnitude of the drop to any neighbour span is greater than the walkableClimb distance.
+                        // That is, there is a gap that is large enough to let an agent move between them, but the drop (surface slope) is too large to allow it.
+                        // (If this is the case, then biggestNeighborStepDown will be negative, so compare against the negative walkableClimb as a means of checking
+                        // the magnitude of the delta)
+                        if (lowestNeighborFloorDifference < -walkableClimb)
                         {
-                                        if (nbot < asmin)
-                                            asmin = nbot;
-                                        if (nbot > asmax)
-                                            asmax = nbot;
+                            span.area = RC_NULL_AREA;
                         }
-                                }
-                            }
-                        }
-
-                        // The current span is close to a ledge if the drop to any
-                        // neighbour span is less than the walkableClimb.
-                        if (minh < -walkableClimb)
-                            s.area = RC_NULL_AREA;
-
-                        // If the difference between all neighbours is too large,
-                        // we are at steep slope, mark the span as ledge.
-                        if ((asmax - asmin) > walkableClimb)
+                        // If the difference between all neighbor floors is too large, this is a steep slope, so mark the span as an unwalkable ledge.
+                        else if ((highestTraversableNeighborFloor - lowestTraversableNeighborFloor) > walkableClimb)
                         {
-                            s.area = RC_NULL_AREA;
+                            span.area = RC_NULL_AREA;
                         }
                     }
                 }
             }
         }
 
-        /// @par
+        /// Marks walkable spans as not walkable if the clearance above the span is less than the specified walkableHeight.
         /// 
         /// For this filter, the clearance above the span is the distance from the span's 
-        /// maximum to the next higher span's minimum. (Same grid column.)
+        /// maximum to the minimum of the next higher span in the same column.
+        /// If there is no higher span in the column, the clearance is computed as the
+        /// distance from the top of the span to the maximum heightfield height.
         /// 
         /// @see rcHeightfield, rcConfig
-        public static void FilterWalkableLowHeightSpans(RcTelemetry ctx, int walkableHeight, RcHeightfield solid)
+        /// @ingroup recast
+        /// 
+        /// @param[in,out]	context			The build context to use during the operation.
+        /// @param[in]		walkableHeight	Minimum floor to 'ceiling' height that will still allow the floor area to 
+        /// 								be considered walkable. [Limit: >= 3] [Units: vx]
+        /// @param[in,out]	heightfield		A fully built heightfield.  (All spans have been added.)
+        public static void FilterWalkableLowHeightSpans(RcContext context, int walkableHeight, RcHeightfield heightfield)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_WALKABLE);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_WALKABLE);
 
-            int w = solid.width;
-            int h = solid.height;
+            int xSize = heightfield.width;
+            int zSize = heightfield.height;
 
             // Remove walkable flag from spans which do not have enough
             // space above them for the agent to stand there.
-            for (int y = 0; y < h; ++y)
+            for (int z = 0; z < zSize; ++z)
             {
-                for (int x = 0; x < w; ++x)
+                for (int x = 0; x < xSize; ++x)
                 {
-                    for (RcSpan s = solid.spans[x + y * w]; s != null; s = s.next)
+                    for (RcSpan span = heightfield.spans[x + z * xSize]; span != null; span = span.next)
                     {
-                        int bot = (s.smax);
-                        int top = s.next != null ? s.next.smin : SPAN_MAX_HEIGHT;
-                        if ((top - bot) < walkableHeight)
-                            s.area = RC_NULL_AREA;
+                        int floor = (span.smax);
+                        int ceiling = span.next != null ? span.next.smin : RC_SPAN_MAX_HEIGHT;
+                        if ((ceiling - floor) < walkableHeight)
+                        {
+                            span.area = RC_NULL_AREA;
+                        }
                     }
                 }
             }

src/DotRecast.Recast/RcHeightfield.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -33,10 +32,10 @@ namespace DotRecast.Recast
         public readonly int height;
 
         /** The minimum bounds in world space. [(x, y, z)] */
-        public readonly Vector3 bmin;
+        public readonly RcVec3f bmin;
 
         /** The maximum bounds in world space. [(x, y, z)] */
-        public Vector3 bmax;
+        public RcVec3f bmax;
 
         /** The size of each cell. (On the xz-plane.) */
         public readonly float cs;
@@ -50,7 +49,7 @@ namespace DotRecast.Recast
         /** Border size in cell units */
         public readonly int borderSize;
 
-        public RcHeightfield(int width, int height, Vector3 bmin, Vector3 bmax, float cs, float ch, int borderSize)
+        public RcHeightfield(int width, int height, RcVec3f bmin, RcVec3f bmax, float cs, float ch, int borderSize)
         {
             this.width = width;
             this.height = height;

src/DotRecast.Recast/RcHeightfieldLayer.cs

@@ -1,5 +1,4 @@
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -7,48 +6,20 @@ namespace DotRecast.Recast
     /// @see rcHeightfieldLayerSet
     public class RcHeightfieldLayer
     {
-        public Vector3 bmin = new Vector3();
-
-        /// < The minimum bounds in world space. [(x, y, z)]
-        public Vector3 bmax = new Vector3();
-
-        /// < The maximum bounds in world space. [(x, y, z)]
-        public float cs;
-
-        /// < The size of each cell. (On the xz-plane.)
-        public float ch;
-
-        /// < The height of each cell. (The minimum increment along the y-axis.)
-        public int width;
-
-        /// < The width of the heightfield. (Along the x-axis in cell units.)
-        public int height;
-
-        /// < The height of the heightfield. (Along the z-axis in cell units.)
-        public int minx;
-
-        /// < The minimum x-bounds of usable data.
-        public int maxx;
-
-        /// < The maximum x-bounds of usable data.
-        public int miny;
-
-        /// < The minimum y-bounds of usable data. (Along the z-axis.)
-        public int maxy;
-
-        /// < The maximum y-bounds of usable data. (Along the z-axis.)
-        public int hmin;
-
-        /// < The minimum height bounds of usable data. (Along the y-axis.)
-        public int hmax;
-
-        /// < The maximum height bounds of usable data. (Along the y-axis.)
-        public int[] heights;
-
-        /// < The heightfield. [Size: width * height]
-        public int[] areas;
-
-        /// < Area ids. [Size: Same as #heights]
-        public int[] cons; /// < Packed neighbor connection information. [Size: Same as #heights]
+        public RcVec3f bmin = new RcVec3f(); // < The minimum bounds in world space. [(x, y, z)]
+        public RcVec3f bmax = new RcVec3f(); // < The maximum bounds in world space. [(x, y, z)]
+        public float cs; // < The size of each cell. (On the xz-plane.)
+        public float ch; // < The height of each cell. (The minimum increment along the y-axis.)
+        public int width; // < The width of the heightfield. (Along the x-axis in cell units.)
+        public int height; // < The height of the heightfield. (Along the z-axis in cell units.)
+        public int minx; // < The minimum x-bounds of usable data.
+        public int maxx; // < The maximum x-bounds of usable data.
+        public int miny; // < The minimum y-bounds of usable data. (Along the z-axis.)
+        public int maxy; // < The maximum y-bounds of usable data. (Along the z-axis.)
+        public int hmin; // < The minimum height bounds of usable data. (Along the y-axis.)
+        public int hmax; // < The maximum height bounds of usable data. (Along the y-axis.)
+        public int[] heights; // < The heightfield. [Size: width * height]
+        public int[] areas; // < Area ids. [Size: Same as #heights]
+        public int[] cons; // < Packed neighbor connection information. [Size: Same as #heights]
     }
 }

src/DotRecast.Recast/RcHeightfieldLayerSet.cs

@@ -18,8 +18,6 @@ freely, subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {

src/DotRecast.Recast/RcLayerRegion.cs

@@ -5,11 +5,11 @@ namespace DotRecast.Recast
     public class RcLayerRegion
     {
         public int id;
-        public int layerId;
-        public bool @base;
+        public int layerId; // Layer ID
+        public bool @base; // Flag indicating if the region is the base of merged regions.
         public int ymin, ymax;
-        public List<int> layers;
-        public List<int> neis;
+        public List<int> layers; // Layer count
+        public List<int> neis; // Neighbour count
 
         public RcLayerRegion(int i)
         {

src/DotRecast.Recast/RcLayerSweepSpan.cs

@@ -1,6 +1,6 @@
-namespace DotRecast.Detour.TileCache
+namespace DotRecast.Recast
 {
-    public class DtLayerSweepSpan
+    public class RcLayerSweepSpan
     {
         public int ns; // number samples
         public int id; // region id

src/DotRecast.Recast/RcLayers.cs

@@ -22,7 +22,6 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -53,30 +52,53 @@ namespace DotRecast.Recast
             return (amin > bmax || amax < bmin) ? false : true;
         }
 
-        public static RcHeightfieldLayerSet BuildHeightfieldLayers(RcTelemetry ctx, RcCompactHeightfield chf, int walkableHeight)
+        /// @par
+        /// 
+        /// See the #rcConfig documentation for more information on the configuration parameters.
+        /// 
+        /// @see rcAllocHeightfieldLayerSet, rcCompactHeightfield, rcHeightfieldLayerSet, rcConfig
+        /// @}
+        /// @name Layer, Contour, Polymesh, and Detail Mesh Functions
+        /// @see rcHeightfieldLayer, rcContourSet, rcPolyMesh, rcPolyMeshDetail
+        /// @{
+
+        /// Builds a layer set from the specified compact heightfield.
+        /// @ingroup recast
+        /// @param[in,out]	ctx				The build context to use during the operation.
+        /// @param[in]		chf				A fully built compact heightfield.
+        /// @param[in]		borderSize		The size of the non-navigable border around the heightfield. [Limit: >=0] 
+        ///  								[Units: vx]
+        /// @param[in]		walkableHeight	Minimum floor to 'ceiling' height that will still allow the floor area 
+        ///  								to be considered walkable. [Limit: >= 3] [Units: vx]
+        /// @param[out]		lset			The resulting layer set. (Must be pre-allocated.)
+        /// @returns True if the operation completed successfully.
+        public static bool BuildHeightfieldLayers(RcContext ctx, RcCompactHeightfield chf, int borderSize, int walkableHeight, out RcHeightfieldLayerSet lset)
         {
+            lset = null;
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_LAYERS);
 
             int w = chf.width;
             int h = chf.height;
-            int borderSize = chf.borderSize;
+            
             int[] srcReg = new int[chf.spanCount];
             Array.Fill(srcReg, 0xFF);
+            
             int nsweeps = chf.width; // Math.Max(chf.width, chf.height);
-            RcSweepSpan[] sweeps = new RcSweepSpan[nsweeps];
+            RcLayerSweepSpan[] sweeps = new RcLayerSweepSpan[nsweeps];
             for (int i = 0; i < sweeps.Length; i++)
             {
-                sweeps[i] = new RcSweepSpan();
+                sweeps[i] = new RcLayerSweepSpan();
             }
 
             // Partition walkable area into monotone regions.
             int[] prevCount = new int[256];
             int regId = 0;
+            
             // Sweep one line at a time.
             for (int y = borderSize; y < h - borderSize; ++y)
             {
                 // Collect spans from this row.
-                Array.Fill(prevCount, 0, 0, (regId) - (0));
+                Array.Fill(prevCount, 0);
                 int sweepId = 0;
 
                 for (int x = borderSize; x < w - borderSize; ++x)
@@ -88,9 +110,10 @@ namespace DotRecast.Recast
                         ref RcCompactSpan s = ref chf.spans[i];
                         if (chf.areas[i] == RC_NULL_AREA)
                             continue;
-                        int sid = 0xFF;
-                        // -x
                         
+                        int sid = 0xFF;
+                        
+                        // -x
                         if (GetCon(ref s, 0) != RC_NOT_CONNECTED)
                         {
                             int ax = x + GetDirOffsetX(0);
@@ -116,8 +139,7 @@ namespace DotRecast.Recast
                             int nr = srcReg[ai];
                             if (nr != 0xff)
                             {
-                                // Set neighbour when first valid neighbour is
-                                // encoutered.
+                                // Set neighbour when first valid neighbour is encoutered.
                                 if (sweeps[sid].ns == 0)
                                     sweeps[sid].nei = nr;
 
@@ -129,8 +151,7 @@ namespace DotRecast.Recast
                                 }
                                 else
                                 {
-                                    // This is hit if there is nore than one
-                                    // neighbour.
+                                    // This is hit if there is nore than one neighbour.
                                     // Invalidate the neighbour.
                                     sweeps[sid].nei = 0xff;
                                 }
@@ -144,10 +165,8 @@ namespace DotRecast.Recast
                 // Create unique ID.
                 for (int i = 0; i < sweepId; ++i)
                 {
-                    // If the neighbour is set and there is only one continuous
-                    // connection to it,
-                    // the sweep will be merged with the previous one, else new
-                    // region is created.
+                    // If the neighbour is set and there is only one continuous connection to it,
+                    // the sweep will be merged with the previous one, else new region is created.
                     if (sweeps[i].nei != 0xff && prevCount[sweeps[i].nei] == sweeps[i].ns)
                     {
                         sweeps[i].id = sweeps[i].nei;
@@ -157,6 +176,7 @@ namespace DotRecast.Recast
                         if (regId == 255)
                         {
                             throw new Exception("rcBuildHeightfieldLayers: Region ID overflow.");
+                            return false;
                         }
 
                         sweeps[i].id = regId++;
@@ -175,6 +195,7 @@ namespace DotRecast.Recast
                 }
             }
 
+            // Allocate and init layer regions.
             int nregs = regId;
             RcLayerRegion[] regs = new RcLayerRegion[nregs];
 
@@ -217,10 +238,15 @@ namespace DotRecast.Recast
                                 int ai = chf.cells[ax + ay * w].index + GetCon(ref s, dir);
                                 int rai = srcReg[ai];
                                 if (rai != 0xff && rai != ri)
+                                {
+                                    // Don't check return value -- if we cannot add the neighbor
+                                    // it will just cause a few more regions to be created, which
+                                    // is fine.
                                     AddUnique(regs[ri].neis, rai);
                                 }
                             }
                         }
+                    }
 
                     // Update overlapping regions.
                     for (int i = 0; i < lregs.Count - 1; ++i)
@@ -288,7 +314,10 @@ namespace DotRecast.Recast
                         regn.layerId = layerId;
                         // Merge current layers to root.
                         foreach (int layer in regn.layers)
+                        {
                             AddUnique(root.layers, layer);
+                        }
+
                         root.ymin = Math.Min(root.ymin, regn.ymin);
                         root.ymax = Math.Max(root.ymax, regn.ymax);
                     }
@@ -329,11 +358,9 @@ namespace DotRecast.Recast
                         if ((ymax - ymin) >= 255)
                             continue;
 
-                        // Make sure that there is no overlap when merging 'ri' and
-                        // 'rj'.
+                        // Make sure that there is no overlap when merging 'ri' and 'rj'.
                         bool overlap = false;
-                        // Iterate over all regions which have the same layerId as
-                        // 'rj'
+                        // Iterate over all regions which have the same layerId as 'rj'
                         for (int k = 0; k < nregs; ++k)
                         {
                             if (regs[k].layerId != rj.layerId)
@@ -371,7 +398,10 @@ namespace DotRecast.Recast
                             rj.layerId = newId;
                             // Add overlaid layers from 'rj' to 'ri'.
                             foreach (int layer in rj.layers)
+                            {
                                 AddUnique(ri.layers, layer);
+                            }
+
                             // Update height bounds.
                             ri.ymin = Math.Min(ri.ymin, rj.ymin);
                             ri.ymax = Math.Max(ri.ymax, rj.ymax);
@@ -397,13 +427,14 @@ namespace DotRecast.Recast
 
             // Remap ids.
             for (int i = 0; i < nregs; ++i)
+            {
                 regs[i].layerId = remap[regs[i].layerId];
+            }
 
             // No layers, return empty.
             if (layerId == 0)
             {
-                // ctx.Stop(RC_TIMER_BUILD_LAYERS);
-                return null;
+                return true;
             }
 
             // Create layers.
@@ -413,14 +444,14 @@ namespace DotRecast.Recast
             int lh = h - borderSize * 2;
 
             // Build contracted bbox for layers.
-            Vector3 bmin = chf.bmin;
-            Vector3 bmax = chf.bmax;
+            RcVec3f bmin = chf.bmin;
+            RcVec3f bmax = chf.bmax;
             bmin.X += borderSize * chf.cs;
             bmin.Z += borderSize * chf.cs;
             bmax.X -= borderSize * chf.cs;
             bmax.Z -= borderSize * chf.cs;
             
-            RcHeightfieldLayerSet lset = new RcHeightfieldLayerSet();
+            lset = new RcHeightfieldLayerSet();
             lset.layers = new RcHeightfieldLayer[layerId];
             for (int i = 0; i < lset.layers.Length; i++)
             {
@@ -516,8 +547,7 @@ namespace DotRecast.Recast
                                     if (chf.areas[ai] != RC_NULL_AREA && lid != alid)
                                     {
                                         portal |= (char)(1 << dir);
-                                        // Update height so that it matches on both
-                                        // sides of the portal.
+                                        // Update height so that it matches on both sides of the portal.
                                         ref RcCompactSpan @as = ref chf.spans[ai];
                                         if (@as.y > hmin)
                                             layer.heights[idx] = Math.Max(layer.heights[idx], (char)(@as.y - hmin));
@@ -545,8 +575,7 @@ namespace DotRecast.Recast
                     layer.miny = layer.maxy = 0;
             }
 
-            // ctx->StopTimer(RC_TIMER_BUILD_LAYERS);
-            return lset;
+            return true;
         }
     }
 }

src/DotRecast.Recast/RcLevelStackEntry.cs

@@ -0,0 +1,16 @@
+namespace DotRecast.Recast
+{
+    public readonly struct RcLevelStackEntry
+    {
+        public readonly int x;
+        public readonly int y;
+        public readonly int index;
+
+        public RcLevelStackEntry(int tempX, int tempY, int tempIndex)
+        {
+            x = tempX;
+            y = tempY;
+            index = tempIndex;
+        }
+    }
+}

src/DotRecast.Recast/RcMeshDetails.cs

@@ -22,7 +22,6 @@ using System;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using static DotRecast.Recast.RcConstants;
 
 namespace DotRecast.Recast
@@ -36,7 +35,7 @@ namespace DotRecast.Recast
         public const int MAX_TRIS = 255; // Max tris for delaunay is 2n-2-k (n=num verts, k=num hull verts).
         public const int MAX_VERTS_PER_EDGE = 32;
 
-        public const int RC_UNSET_HEIGHT = RcConstants.SPAN_MAX_HEIGHT;
+        public const int RC_UNSET_HEIGHT = RcConstants.RC_SPAN_MAX_HEIGHT;
         public const int EV_UNDEF = -1;
         public const int EV_HULL = -2;
 
@@ -46,7 +45,7 @@ namespace DotRecast.Recast
             return a[0] * b[0] + a[2] * b[2];
         }
 
-        private static float Vdot2(Vector3 a, Vector3 b)
+        private static float Vdot2(RcVec3f a, RcVec3f b)
         {
             return a.X * b.X + a.Z * b.Z;
         }
@@ -71,7 +70,7 @@ namespace DotRecast.Recast
             return dx * dx + dy * dy;
         }
 
-        private static float VdistSq2(float[] p, Vector3 q)
+        private static float VdistSq2(float[] p, RcVec3f q)
         {
             float dx = q.X - p[0];
             float dy = q.Z - p[2];
@@ -79,7 +78,7 @@ namespace DotRecast.Recast
         }
 
 
-        private static float VdistSq2(Vector3 p, Vector3 q)
+        private static float VdistSq2(RcVec3f p, RcVec3f q)
         {
             float dx = q.X - p.X;
             float dy = q.Z - p.Z;
@@ -92,12 +91,12 @@ namespace DotRecast.Recast
             return MathF.Sqrt(VdistSq2(p, q));
         }
 
-        private static float Vdist2(Vector3 p, Vector3 q)
+        private static float Vdist2(RcVec3f p, RcVec3f q)
         {
             return MathF.Sqrt(VdistSq2(p, q));
         }
 
-        private static float Vdist2(float[] p, Vector3 q)
+        private static float Vdist2(float[] p, RcVec3f q)
         {
             return MathF.Sqrt(VdistSq2(p, q));
         }
@@ -110,7 +109,7 @@ namespace DotRecast.Recast
             return dx * dx + dy * dy;
         }
 
-        private static float VdistSq2(Vector3 p, float[] verts, int q)
+        private static float VdistSq2(RcVec3f p, float[] verts, int q)
         {
             float dx = verts[q + 0] - p.X;
             float dy = verts[q + 2] - p.Z;
@@ -123,7 +122,7 @@ namespace DotRecast.Recast
             return MathF.Sqrt(VdistSq2(p, verts, q));
         }
 
-        private static float Vdist2(Vector3 p, float[] verts, int q)
+        private static float Vdist2(RcVec3f p, float[] verts, int q)
         {
             return MathF.Sqrt(VdistSq2(p, verts, q));
         }
@@ -147,7 +146,7 @@ namespace DotRecast.Recast
             return u1 * v2 - v1 * u2;
         }
 
-        private static float Vcross2(Vector3 p1, Vector3 p2, Vector3 p3)
+        private static float Vcross2(RcVec3f p1, RcVec3f p2, RcVec3f p3)
         {
             float u1 = p2.X - p1.X;
             float v1 = p2.Z - p1.Z;
@@ -157,11 +156,11 @@ namespace DotRecast.Recast
         }
 
 
-        private static bool CircumCircle(float[] verts, int p1, int p2, int p3, ref Vector3 c, RcAtomicFloat r)
+        private static bool CircumCircle(float[] verts, int p1, int p2, int p3, ref RcVec3f c, RcAtomicFloat r)
         {
             const float EPS = 1e-6f;
             // Calculate the circle relative to p1, to avoid some precision issues.
-            var v1 = new Vector3();
+            var v1 = new RcVec3f();
             var v2 = RcVecUtils.Subtract(verts, p2, p1);
             var v3 = RcVecUtils.Subtract(verts, p3, p1);
 
@@ -184,7 +183,7 @@ namespace DotRecast.Recast
             return false;
         }
 
-        private static float DistPtTri(Vector3 p, float[] verts, int a, int b, int c)
+        private static float DistPtTri(RcVec3f p, float[] verts, int a, int b, int c)
         {
             var v0 = RcVecUtils.Subtract(verts, c, a);
             var v1 = RcVecUtils.Subtract(verts, b, a);
@@ -243,7 +242,7 @@ namespace DotRecast.Recast
             return dx * dx + dy * dy + dz * dz;
         }
 
-        private static float DistancePtSeg2d(Vector3 verts, float[] poly, int p, int q)
+        private static float DistancePtSeg2d(RcVec3f verts, float[] poly, int p, int q)
         {
             float pqx = poly[q + 0] - poly[p + 0];
             float pqz = poly[q + 2] - poly[p + 2];
@@ -299,7 +298,7 @@ namespace DotRecast.Recast
             return dx * dx + dz * dz;
         }
 
-        private static float DistToTriMesh(Vector3 p, float[] verts, int nverts, List<int> tris, int ntris)
+        private static float DistToTriMesh(RcVec3f p, float[] verts, int nverts, List<int> tris, int ntris)
         {
             float dmin = float.MaxValue;
             for (int i = 0; i < ntris; ++i)
@@ -322,7 +321,7 @@ namespace DotRecast.Recast
             return dmin;
         }
 
-        private static float DistToPoly(int nvert, float[] verts, Vector3 p)
+        private static float DistToPoly(int nvert, float[] verts, RcVec3f p)
         {
             float dmin = float.MaxValue;
             int i, j;
@@ -440,7 +439,7 @@ namespace DotRecast.Recast
             return EV_UNDEF;
         }
 
-        private static void AddEdge(RcTelemetry ctx, List<int> edges, int maxEdges, int s, int t, int l, int r)
+        private static void AddEdge(RcContext ctx, List<int> edges, int maxEdges, int s, int t, int l, int r)
         {
             if (edges.Count / 4 >= maxEdges)
             {
@@ -508,7 +507,7 @@ namespace DotRecast.Recast
             return false;
         }
 
-        static int CompleteFacet(RcTelemetry ctx, float[] pts, int npts, List<int> edges, int maxEdges, int nfaces, int e)
+        static int CompleteFacet(RcContext ctx, float[] pts, int npts, List<int> edges, int maxEdges, int nfaces, int e)
         {
             const float EPS = 1e-5f;
 
@@ -534,7 +533,7 @@ namespace DotRecast.Recast
 
             // Find best point on left of edge.
             int pt = npts;
-            Vector3 c = new Vector3();
+            RcVec3f c = new RcVec3f();
             RcAtomicFloat r = new RcAtomicFloat(-1f);
             for (int u = 0; u < npts; ++u)
             {
@@ -625,7 +624,7 @@ namespace DotRecast.Recast
             return nfaces;
         }
 
-        private static void DelaunayHull(RcTelemetry ctx, int npts, float[] pts, int nhull, int[] hull, List<int> tris)
+        private static void DelaunayHull(RcContext ctx, int npts, float[] pts, int nhull, int[] hull, List<int> tris)
         {
             int nfaces = 0;
             int maxEdges = npts * 10;
@@ -829,7 +828,7 @@ namespace DotRecast.Recast
             return (((i * 0xd8163841) & 0xffff) / 65535.0f * 2.0f) - 1.0f;
         }
 
-        static int BuildPolyDetail(RcTelemetry ctx, float[] @in, int nin, float sampleDist, float sampleMaxError,
+        static int BuildPolyDetail(RcContext ctx, float[] @in, int nin, float sampleDist, float sampleMaxError,
             int heightSearchRadius, RcCompactHeightfield chf, RcHeightPatch hp, float[] verts, List<int> tris)
         {
             List<int> samples = new List<int>(512);
@@ -870,9 +869,7 @@ namespace DotRecast.Recast
                     {
                         if (@in[vj + 2] > @in[vi + 2])
                         {
-                            int temp = vi;
-                            vi = vj;
-                            vj = temp;
+                            (vi, vj) = (vj, vi);
                             swapped = true;
                         }
                     }
@@ -880,9 +877,7 @@ namespace DotRecast.Recast
                     {
                         if (@in[vj + 0] > @in[vi + 0])
                         {
-                            int temp = vi;
-                            vi = vj;
-                            vj = temp;
+                            (vi, vj) = (vj, vi);
                             swapped = true;
                         }
                     }
@@ -1002,8 +997,8 @@ namespace DotRecast.Recast
             if (sampleDist > 0)
             {
                 // Create sample locations in a grid.
-                Vector3 bmin = RcVecUtils.Create(@in);
-                Vector3 bmax = RcVecUtils.Create(@in);
+                RcVec3f bmin = RcVecUtils.Create(@in);
+                RcVec3f bmax = RcVecUtils.Create(@in);
                 for (int i = 1; i < nin; ++i)
                 {
                     bmin = RcVecUtils.Min(bmin, @in, i * 3);
@@ -1019,7 +1014,7 @@ namespace DotRecast.Recast
                 {
                     for (int x = x0; x < x1; ++x)
                     {
-                        Vector3 pt = new Vector3();
+                        RcVec3f pt = new RcVec3f();
                         pt.X = x * sampleDist;
                         pt.Y = (bmax.Y + bmin.Y) * 0.5f;
                         pt.Z = z * sampleDist;
@@ -1048,7 +1043,7 @@ namespace DotRecast.Recast
                     }
 
                     // Find sample with most error.
-                    Vector3 bestpt = new Vector3();
+                    RcVec3f bestpt = new RcVec3f();
                     float bestd = 0;
                     int besti = -1;
                     for (int i = 0; i < nsamples; ++i)
@@ -1059,7 +1054,7 @@ namespace DotRecast.Recast
                             continue; // skip added.
                         }
 
-                        Vector3 pt = new Vector3();
+                        RcVec3f pt = new RcVec3f();
                         // The sample location is jittered to get rid of some bad triangulations
                         // which are cause by symmetrical data from the grid structure.
                         pt.X = samples[s + 0] * sampleDist + GetJitterX(i) * cs * 0.1f;
@@ -1145,7 +1140,7 @@ namespace DotRecast.Recast
         }
 
 
-        static void SeedArrayWithPolyCenter(RcTelemetry ctx, RcCompactHeightfield chf, int[] meshpoly, int poly, int npoly,
+        static void SeedArrayWithPolyCenter(RcContext ctx, RcCompactHeightfield chf, int[] meshpoly, int poly, int npoly,
             int[] verts, int bs, RcHeightPatch hp, List<int> array)
         {
             // Note: Reads to the compact heightfield are offset by border size (bs)
@@ -1303,7 +1298,7 @@ namespace DotRecast.Recast
             queue.Add(v3);
         }
 
-        static void GetHeightData(RcTelemetry ctx, RcCompactHeightfield chf, int[] meshpolys, int poly, int npoly, int[] verts,
+        static void GetHeightData(RcContext ctx, RcCompactHeightfield chf, int[] meshpolys, int poly, int npoly, int[] verts,
             int bs, RcHeightPatch hp, int region)
         {
             // Note: Reads to the compact heightfield are offset by border size (bs)
@@ -1429,7 +1424,7 @@ namespace DotRecast.Recast
         /// See the #rcConfig documentation for more information on the configuration parameters.
         ///
         /// @see rcAllocPolyMeshDetail, rcPolyMesh, rcCompactHeightfield, rcPolyMeshDetail, rcConfig
-        public static RcPolyMeshDetail BuildPolyMeshDetail(RcTelemetry ctx, RcPolyMesh mesh, RcCompactHeightfield chf,
+        public static RcPolyMeshDetail BuildPolyMeshDetail(RcContext ctx, RcPolyMesh mesh, RcCompactHeightfield chf,
             float sampleDist, float sampleMaxError)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_POLYMESHDETAIL);
@@ -1442,7 +1437,7 @@ namespace DotRecast.Recast
             int nvp = mesh.nvp;
             float cs = mesh.cs;
             float ch = mesh.ch;
-            Vector3 orig = mesh.bmin;
+            RcVec3f orig = mesh.bmin;
             int borderSize = mesh.borderSize;
             int heightSearchRadius = (int)Math.Max(1, MathF.Ceiling(mesh.maxEdgeError));
 
@@ -1619,7 +1614,7 @@ namespace DotRecast.Recast
         }
 
         /// @see rcAllocPolyMeshDetail, rcPolyMeshDetail
-        private static RcPolyMeshDetail MergePolyMeshDetails(RcTelemetry ctx, RcPolyMeshDetail[] meshes, int nmeshes)
+        private static RcPolyMeshDetail MergePolyMeshDetails(RcContext ctx, RcPolyMeshDetail[] meshes, int nmeshes)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MERGE_POLYMESHDETAIL);
 

src/DotRecast.Recast/RcMeshs.cs

@@ -21,7 +21,6 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
@@ -578,7 +577,7 @@ namespace DotRecast.Recast
             return an;
         }
 
-        private static bool CanRemoveVertex(RcTelemetry ctx, RcPolyMesh mesh, int rem)
+        private static bool CanRemoveVertex(RcContext ctx, RcPolyMesh mesh, int rem)
         {
             int nvp = mesh.nvp;
 
@@ -681,7 +680,7 @@ namespace DotRecast.Recast
             return true;
         }
 
-        private static void RemoveVertex(RcTelemetry ctx, RcPolyMesh mesh, int rem, int maxTris)
+        private static void RemoveVertex(RcContext ctx, RcPolyMesh mesh, int rem, int maxTris)
         {
             int nvp = mesh.nvp;
 
@@ -968,7 +967,7 @@ namespace DotRecast.Recast
         /// limit must be restricted to <= #DT_VERTS_PER_POLYGON.
         ///
         /// @see rcAllocPolyMesh, rcContourSet, rcPolyMesh, rcConfig
-        public static RcPolyMesh BuildPolyMesh(RcTelemetry ctx, RcContourSet cset, int nvp)
+        public static RcPolyMesh BuildPolyMesh(RcContext ctx, RcContourSet cset, int nvp)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_POLYMESH);
 
@@ -1213,7 +1212,7 @@ namespace DotRecast.Recast
         }
 
         /// @see rcAllocPolyMesh, rcPolyMesh
-        public static RcPolyMesh MergePolyMeshes(RcTelemetry ctx, RcPolyMesh[] meshes, int nmeshes)
+        public static RcPolyMesh MergePolyMeshes(RcContext ctx, RcPolyMesh[] meshes, int nmeshes)
         {
             if (nmeshes == 0 || meshes == null)
                 return null;
@@ -1232,8 +1231,8 @@ namespace DotRecast.Recast
             int maxVertsPerMesh = 0;
             for (int i = 0; i < nmeshes; ++i)
             {
-                mesh.bmin = Vector3.Min(mesh.bmin, meshes[i].bmin);
-                mesh.bmax = Vector3.Max(mesh.bmax, meshes[i].bmax);
+                mesh.bmin = RcVec3f.Min(mesh.bmin, meshes[i].bmin);
+                mesh.bmax = RcVec3f.Max(mesh.bmax, meshes[i].bmax);
                 maxVertsPerMesh = Math.Max(maxVertsPerMesh, meshes[i].nverts);
                 maxVerts += meshes[i].nverts;
                 maxPolys += meshes[i].npolys;
@@ -1341,7 +1340,7 @@ namespace DotRecast.Recast
             return mesh;
         }
 
-        public static RcPolyMesh CopyPolyMesh(RcTelemetry ctx, RcPolyMesh src)
+        public static RcPolyMesh CopyPolyMesh(RcContext ctx, RcPolyMesh src)
         {
             RcPolyMesh dst = new RcPolyMesh();
 

src/DotRecast.Recast/RcPolyMesh.cs

@@ -19,56 +19,29 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
-    /** Represents a polygon mesh suitable for use in building a navigation mesh. */
+    /// Represents a polygon mesh suitable for use in building a navigation mesh. 
+    /// @ingroup recast
     public class RcPolyMesh
     {
-        /** The mesh vertices. [Form: (x, y, z) coordinates * #nverts] */
-        public int[] verts;
+        public int[] verts; // The mesh vertices. [Form: (x, y, z) coordinates * #nverts]
+        public int[] polys; // Polygon and neighbor data. [Length: #maxpolys * 2 * #nvp]
+        public int[] regs; // The region id assigned to each polygon. [Length: #maxpolys]
+        public int[] areas; // The area id assigned to each polygon. [Length: #maxpolys]
+        public int nverts; // The number of vertices.
+        public int npolys; // The number of polygons.
+        public int nvp; // The maximum number of vertices per polygon.
+        public int maxpolys; // The number of allocated polygons.
+        public int[] flags; // The user defined flags for each polygon. [Length: #maxpolys]
+        public RcVec3f bmin = new RcVec3f(); // The minimum bounds in world space. [(x, y, z)]
+        public RcVec3f bmax = new RcVec3f(); // The maximum bounds in world space. [(x, y, z)]
 
-        /** Polygon and neighbor data. [Length: #maxpolys * 2 * #nvp] */
-        public int[] polys;
+        public float cs; // The size of each cell. (On the xz-plane.)
+        public float ch; // The height of each cell. (The minimum increment along the y-axis.)
 
-        /** The region id assigned to each polygon. [Length: #maxpolys] */
-        public int[] regs;
-
-        /** The area id assigned to each polygon. [Length: #maxpolys] */
-        public int[] areas;
-
-        /** The number of vertices. */
-        public int nverts;
-
-        /** The number of polygons. */
-        public int npolys;
-
-        /** The maximum number of vertices per polygon. */
-        public int nvp;
-
-        /** The number of allocated polygons. */
-        public int maxpolys;
-
-        /** The user defined flags for each polygon. [Length: #maxpolys] */
-        public int[] flags;
-
-        /** The minimum bounds in world space. [(x, y, z)] */
-        public Vector3 bmin = new Vector3();
-
-        /** The maximum bounds in world space. [(x, y, z)] */
-        public Vector3 bmax = new Vector3();
-
-        /** The size of each cell. (On the xz-plane.) */
-        public float cs;
-
-        /** The height of each cell. (The minimum increment along the y-axis.) */
-        public float ch;
-
-        /** The AABB border size used to generate the source data from which the mesh was derived. */
-        public int borderSize;
-
-        /** The max error of the polygon edges in the mesh. */
-        public float maxEdgeError;
+        public int borderSize; // The AABB border size used to generate the source data from which the mesh was derived.
+        public float maxEdgeError; // The max error of the polygon edges in the mesh.
     }
 }

src/DotRecast.Recast/RcPolyMeshDetail.cs

@@ -20,28 +20,16 @@ freely, subject to the following restrictions:
 
 namespace DotRecast.Recast
 {
-    /**
- * Contains triangle meshes that represent detailed height data associated with the polygons in its associated polygon
- * mesh object.
- */
+    /// Contains triangle meshes that represent detailed height data associated 
+    /// with the polygons in its associated polygon mesh object.
+    /// @ingroup recast
     public class RcPolyMeshDetail
     {
-        /** The sub-mesh data. [Size: 4*#nmeshes] */
-        public int[] meshes;
-
-        /** The mesh vertices. [Size: 3*#nverts] */
-        public float[] verts;
-
-        /** The mesh triangles. [Size: 4*#ntris] */
-        public int[] tris;
-
-        /** The number of sub-meshes defined by #meshes. */
-        public int nmeshes;
-
-        /** The number of vertices in #verts. */
-        public int nverts;
-
-        /** The number of triangles in #tris. */
-        public int ntris;
+        public int[] meshes; //< The sub-mesh data. [Size: 4*#nmeshes] 
+        public float[] verts; //< The mesh vertices. [Size: 3*#nverts] 
+        public int[] tris; //< The mesh triangles. [Size: 4*#ntris] 
+        public int nmeshes; //< The number of sub-meshes defined by #meshes.
+        public int nverts; //< The number of vertices in #verts.
+        public int ntris; //< The number of triangles in #tris.
     }
 }

src/DotRecast.Recast/RcPolyMeshRaycast.cs

@@ -20,13 +20,12 @@ freely, subject to the following restrictions:
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 namespace DotRecast.Recast
 {
     public static class RcPolyMeshRaycast
     {
-        public static bool Raycast(IList<RcBuilderResult> results, Vector3 src, Vector3 dst, out float hitTime)
+        public static bool Raycast(IList<RcBuilderResult> results, RcVec3f src, RcVec3f dst, out float hitTime)
         {
             hitTime = 0.0f;
             foreach (RcBuilderResult result in results)
@@ -43,7 +42,7 @@ namespace DotRecast.Recast
             return false;
         }
 
-        private static bool Raycast(RcPolyMesh poly, RcPolyMeshDetail meshDetail, Vector3 sp, Vector3 sq, out float hitTime)
+        private static bool Raycast(RcPolyMesh poly, RcPolyMeshDetail meshDetail, RcVec3f sp, RcVec3f sq, out float hitTime)
         {
             hitTime = 0;
             if (meshDetail != null)
@@ -58,7 +57,7 @@ namespace DotRecast.Recast
                     int tris = btris * 4;
                     for (int j = 0; j < ntris; ++j)
                     {
-                        Vector3[] vs = new Vector3[3];
+                        RcVec3f[] vs = new RcVec3f[3];
                         for (int k = 0; k < 3; ++k)
                         {
                             vs[k].X = meshDetail.verts[verts + meshDetail.tris[tris + j * 4 + k] * 3];

src/DotRecast.Recast/RcRasterizations.cs

@@ -21,42 +21,25 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using static DotRecast.Recast.RcConstants;
 
 namespace DotRecast.Recast
 {
     public static class RcRasterizations
     {
-        /**
-         * Check whether two bounding boxes overlap
-         *
-         * @param amin
-         *            Min axis extents of bounding box A
-         * @param amax
-         *            Max axis extents of bounding box A
-         * @param bmin
-         *            Min axis extents of bounding box B
-         * @param bmax
-         *            Max axis extents of bounding box B
-         * @returns true if the two bounding boxes overlap. False otherwise
-         */
-        private static bool OverlapBounds(float[] amin, float[] amax, float[] bmin, float[] bmax)
+        /// Check whether two bounding boxes overlap
+        ///
+        /// @param[in]	aMin	Min axis extents of bounding box A
+        /// @param[in]	aMax	Max axis extents of bounding box A
+        /// @param[in]	bMin	Min axis extents of bounding box B
+        /// @param[in]	bMax	Max axis extents of bounding box B
+        /// @returns true if the two bounding boxes overlap.  False otherwise.
+        private static bool OverlapBounds(RcVec3f aMin, RcVec3f aMax, RcVec3f bMin, RcVec3f bMax)
         {
-            bool overlap = true;
-            overlap = (amin[0] > bmax[0] || amax[0] < bmin[0]) ? false : overlap;
-            overlap = (amin[1] > bmax[1] || amax[1] < bmin[1]) ? false : overlap;
-            overlap = (amin[2] > bmax[2] || amax[2] < bmin[2]) ? false : overlap;
-            return overlap;
-        }
-
-        private static bool OverlapBounds(Vector3 amin, Vector3 amax, Vector3 bmin, Vector3 bmax)
-        {
-            bool overlap = true;
-            overlap = (amin.X > bmax.X || amax.X < bmin.X) ? false : overlap;
-            overlap = (amin.Y > bmax.Y || amax.Y < bmin.Y) ? false : overlap;
-            overlap = (amin.Z > bmax.Z || amax.Z < bmin.Z) ? false : overlap;
-            return overlap;
+            return
+                aMin.X <= bMax.X && aMax.X >= bMin.X &&
+                aMin.Y <= bMax.Y && aMax.Y >= bMin.Y &&
+                aMin.Z <= bMax.Z && aMax.Z >= bMin.Z;
         }
 
 
@@ -70,72 +53,89 @@ namespace DotRecast.Recast
         /// @param[in]	max					The new span's maximum cell index
         /// @param[in]	areaID				The new span's area type ID
         /// @param[in]	flagMergeThreshold	How close two spans maximum extents need to be to merge area type IDs
-        public static void AddSpan(RcHeightfield heightfield, int x, int y, int spanMin, int spanMax, int areaId, int flagMergeThreshold)
+        public static void AddSpan(RcHeightfield heightfield, int x, int z, int min, int max, int areaID, int flagMergeThreshold)
         {
-            int idx = x + y * heightfield.width;
+            // Create the new span.
+            RcSpan newSpan = new RcSpan();
+            newSpan.smin = min;
+            newSpan.smax = max;
+            newSpan.area = areaID;
+            newSpan.next = null;
 
-            RcSpan s = new RcSpan();
-            s.smin = spanMin;
-            s.smax = spanMax;
-            s.area = areaId;
-            s.next = null;
+            int columnIndex = x + z * heightfield.width;
 
             // Empty cell, add the first span.
-            if (heightfield.spans[idx] == null)
+            if (heightfield.spans[columnIndex] == null)
             {
-                heightfield.spans[idx] = s;
+                heightfield.spans[columnIndex] = newSpan;
                 return;
             }
 
-            RcSpan prev = null;
-            RcSpan cur = heightfield.spans[idx];
+            RcSpan previousSpan = null;
+            RcSpan currentSpan = heightfield.spans[columnIndex];
 
-            // Insert and merge spans.
-            while (cur != null)
+            // Insert the new span, possibly merging it with existing spans.
+            while (currentSpan != null)
             {
-                if (cur.smin > s.smax)
+                if (currentSpan.smin > newSpan.smax)
                 {
                     // Current span is further than the new span, break.
                     break;
                 }
-                else if (cur.smax < s.smin)
+
+                if (currentSpan.smax < newSpan.smin)
                 {
-                    // Current span is before the new span advance.
-                    prev = cur;
-                    cur = cur.next;
+                    // Current span is completely before the new span.  Keep going.
+                    previousSpan = currentSpan;
+                    currentSpan = currentSpan.next;
                 }
                 else
                 {
-                    // Merge spans.
-                    if (cur.smin < s.smin)
-                        s.smin = cur.smin;
-                    if (cur.smax > s.smax)
-                        s.smax = cur.smax;
+                    // The new span overlaps with an existing span.  Merge them.
+                    if (currentSpan.smin < newSpan.smin)
+                    {
+                        newSpan.smin = currentSpan.smin;
+                    }
+
+                    if (currentSpan.smax > newSpan.smax)
+                    {
+                        newSpan.smax = currentSpan.smax;
+                    }
 
                     // Merge flags.
-                    if (MathF.Abs(s.smax - cur.smax) <= flagMergeThreshold)
-                        s.area = Math.Max(s.area, cur.area);
-
-                    // Remove current span.
-                    RcSpan next = cur.next;
-                    if (prev != null)
-                        prev.next = next;
-                    else
-                        heightfield.spans[idx] = next;
-                    cur = next;
-                }
-            }
-
-            // Insert new span.
-            if (prev != null)
+                    if (MathF.Abs(newSpan.smax - currentSpan.smax) <= flagMergeThreshold)
                     {
-                s.next = prev.next;
-                prev.next = s;
+                        // Higher area ID numbers indicate higher resolution priority.
+                        newSpan.area = Math.Max(newSpan.area, currentSpan.area);
+                    }
+
+                    // Remove the current span since it's now merged with newSpan.
+                    // Keep going because there might be other overlapping spans that also need to be merged.
+                    RcSpan next = currentSpan.next;
+                    if (previousSpan != null)
+                    {
+                        previousSpan.next = next;
                     }
                     else
                     {
-                s.next = heightfield.spans[idx];
-                heightfield.spans[idx] = s;
+                        heightfield.spans[columnIndex] = next;
+                    }
+
+                    currentSpan = next;
+                }
+            }
+
+            // Insert new span after prev
+            if (previousSpan != null)
+            {
+                newSpan.next = previousSpan.next;
+                previousSpan.next = newSpan;
+            }
+            else
+            {
+                // This span should go before the others in the list
+                newSpan.next = heightfield.spans[columnIndex];
+                heightfield.spans[columnIndex] = newSpan;
             }
         }
 
@@ -155,55 +155,54 @@ namespace DotRecast.Recast
             int outVerts2, out int outVerts2Count,
             float axisOffset, int axis)
         {
-            float[] d = new float[12];
-
             // How far positive or negative away from the separating axis is each vertex.
+            float[] inVertAxisDelta = new float[12];
             for (int inVert = 0; inVert < inVertsCount; ++inVert)
             {
-                d[inVert] = axisOffset - inVerts[inVertsOffset + inVert * 3 + axis];
+                inVertAxisDelta[inVert] = axisOffset - inVerts[inVertsOffset + inVert * 3 + axis];
             }
 
             int poly1Vert = 0;
             int poly2Vert = 0;
             for (int inVertA = 0, inVertB = inVertsCount - 1; inVertA < inVertsCount; inVertB = inVertA, ++inVertA)
             {
-                bool ina = d[inVertB] >= 0;
-                bool inb = d[inVertA] >= 0;
-                if (ina != inb)
+                // If the two vertices are on the same side of the separating axis
+                bool sameSide = (inVertAxisDelta[inVertA] >= 0) == (inVertAxisDelta[inVertB] >= 0);
+                if (!sameSide)
                 {
-                    float s = d[inVertB] / (d[inVertB] - d[inVertA]);
-                    inVerts[outVerts1 + poly1Vert * 3 + 0] = inVerts[inVertsOffset + inVertB * 3 + 0] +
-                                                             (inVerts[inVertsOffset + inVertA * 3 + 0] - inVerts[inVertsOffset + inVertB * 3 + 0]) * s;
-                    inVerts[outVerts1 + poly1Vert * 3 + 1] = inVerts[inVertsOffset + inVertB * 3 + 1] +
-                                                             (inVerts[inVertsOffset + inVertA * 3 + 1] - inVerts[inVertsOffset + inVertB * 3 + 1]) * s;
-                    inVerts[outVerts1 + poly1Vert * 3 + 2] = inVerts[inVertsOffset + inVertB * 3 + 2] +
-                                                             (inVerts[inVertsOffset + inVertA * 3 + 2] - inVerts[inVertsOffset + inVertB * 3 + 2]) * s;
+                    float s = inVertAxisDelta[inVertB] / (inVertAxisDelta[inVertB] - inVertAxisDelta[inVertA]);
+                    inVerts[outVerts1 + poly1Vert * 3 + 0] = inVerts[inVertsOffset + inVertB * 3 + 0] + (inVerts[inVertsOffset + inVertA * 3 + 0] - inVerts[inVertsOffset + inVertB * 3 + 0]) * s;
+                    inVerts[outVerts1 + poly1Vert * 3 + 1] = inVerts[inVertsOffset + inVertB * 3 + 1] + (inVerts[inVertsOffset + inVertA * 3 + 1] - inVerts[inVertsOffset + inVertB * 3 + 1]) * s;
+                    inVerts[outVerts1 + poly1Vert * 3 + 2] = inVerts[inVertsOffset + inVertB * 3 + 2] + (inVerts[inVertsOffset + inVertA * 3 + 2] - inVerts[inVertsOffset + inVertB * 3 + 2]) * s;
                     RcVecUtils.Copy(inVerts, outVerts2 + poly2Vert * 3, inVerts, outVerts1 + poly1Vert * 3);
                     poly1Vert++;
                     poly2Vert++;
+
                     // add the i'th point to the right polygon. Do NOT add points that are on the dividing line
                     // since these were already added above
-                    if (d[inVertA] > 0)
+                    if (inVertAxisDelta[inVertA] > 0)
                     {
                         RcVecUtils.Copy(inVerts, outVerts1 + poly1Vert * 3, inVerts, inVertsOffset + inVertA * 3);
                         poly1Vert++;
                     }
-                    else if (d[inVertA] < 0)
+                    else if (inVertAxisDelta[inVertA] < 0)
                     {
                         RcVecUtils.Copy(inVerts, outVerts2 + poly2Vert * 3, inVerts, inVertsOffset + inVertA * 3);
                         poly2Vert++;
                     }
                 }
-                else // same side
+                else
                 {
                     // add the i'th point to the right polygon. Addition is done even for points on the dividing line
-                    if (d[inVertA] >= 0)
+                    if (inVertAxisDelta[inVertA] >= 0)
                     {
                         RcVecUtils.Copy(inVerts, outVerts1 + poly1Vert * 3, inVerts, inVertsOffset + inVertA * 3);
                         poly1Vert++;
-                        if (d[inVertA] != 0)
+                        if (inVertAxisDelta[inVertA] != 0)
+                        {
                             continue;
                         }
+                    }
 
                     RcVecUtils.Copy(inVerts, outVerts2 + poly2Vert * 3, inVerts, inVertsOffset + inVertA * 3);
                     poly2Vert++;
@@ -230,31 +229,35 @@ namespace DotRecast.Recast
         /// @param[in] 	inverseCellHeight	1 / cellHeight
         /// @param[in] 	flagMergeThreshold	The threshold in which area flags will be merged 
         /// @returns true if the operation completes successfully.  false if there was an error adding spans to the heightfield.
-        private static void RasterizeTri(float[] verts, int v0, int v1, int v2, int area, RcHeightfield heightfield,
-            Vector3 heightfieldBBMin, Vector3 heightfieldBBMax,
+        private static bool RasterizeTri(float[] verts, int v0, int v1, int v2,
+            int areaID, RcHeightfield heightfield,
+            RcVec3f heightfieldBBMin, RcVec3f heightfieldBBMax,
             float cellSize, float inverseCellSize, float inverseCellHeight,
             int flagMergeThreshold)
         {
-            float by = heightfieldBBMax.Y - heightfieldBBMin.Y;
-
             // Calculate the bounding box of the triangle.
-            Vector3 tmin = RcVecUtils.Create(verts, v0 * 3);
-            Vector3 tmax = RcVecUtils.Create(verts, v0 * 3);
-            tmin = RcVecUtils.Min(tmin, verts, v1 * 3);
-            tmin = RcVecUtils.Min(tmin, verts, v2 * 3);
-            tmax = RcVecUtils.Max(tmax, verts, v1 * 3);
-            tmax = RcVecUtils.Max(tmax, verts, v2 * 3);
+            RcVec3f triBBMin = RcVecUtils.Create(verts, v0 * 3);
+            triBBMin = RcVecUtils.Min(triBBMin, verts, v1 * 3);
+            triBBMin = RcVecUtils.Min(triBBMin, verts, v2 * 3);
 
-            // If the triangle does not touch the bbox of the heightfield, skip the triagle.
-            if (!OverlapBounds(heightfieldBBMin, heightfieldBBMax, tmin, tmax))
-                return;
+            RcVec3f triBBMax = RcVecUtils.Create(verts, v0 * 3);
+            triBBMax = RcVecUtils.Max(triBBMax, verts, v1 * 3);
+            triBBMax = RcVecUtils.Max(triBBMax, verts, v2 * 3);
 
-            // Calculate the footprint of the triangle on the grid's y-axis
-            int z0 = (int)((tmin.Z - heightfieldBBMin.Z) * inverseCellSize);
-            int z1 = (int)((tmax.Z - heightfieldBBMin.Z) * inverseCellSize);
+            // If the triangle does not touch the bounding box of the heightfield, skip the triangle.
+            if (!OverlapBounds(triBBMin, triBBMax, heightfieldBBMin, heightfieldBBMax))
+            {
+                return true;
+            }
 
             int w = heightfield.width;
             int h = heightfield.height;
+            float by = heightfieldBBMax.Y - heightfieldBBMin.Y;
+
+            // Calculate the footprint of the triangle on the grid's y-axis
+            int z0 = (int)((triBBMin.Z - heightfieldBBMin.Z) * inverseCellSize);
+            int z1 = (int)((triBBMax.Z - heightfieldBBMin.Z) * inverseCellSize);
+
             // use -1 rather than 0 to cut the polygon properly at the start of the tile
             z0 = Math.Clamp(z0, -1, h - 1);
             z1 = Math.Clamp(z1, 0, h - 1);
@@ -269,25 +272,29 @@ namespace DotRecast.Recast
             RcVecUtils.Copy(buf, 0, verts, v0 * 3);
             RcVecUtils.Copy(buf, 3, verts, v1 * 3);
             RcVecUtils.Copy(buf, 6, verts, v2 * 3);
-            int nvRow, nvIn = 3;
+            int nvRow;
+            int nvIn = 3;
 
             for (int z = z0; z <= z1; ++z)
             {
                 // Clip polygon to row. Store the remaining polygon as well
                 float cellZ = heightfieldBBMin.Z + z * cellSize;
-                DividePoly(buf, @in, nvIn, inRow, out nvRow, p1, out nvIn, cellZ + cellSize, 2);
+                DividePoly(buf, @in, nvIn, inRow, out nvRow, p1, out nvIn, cellZ + cellSize, RcAxis.RC_AXIS_Z);
                 (@in, p1) = (p1, @in);
 
                 if (nvRow < 3)
+                {
                     continue;
+                }
 
                 if (z < 0)
                 {
                     continue;
                 }
 
-                // find the horizontal bounds in the row
-                float minX = buf[inRow], maxX = buf[inRow];
+                // find X-axis bounds of the row
+                float minX = buf[inRow];
+                float maxX = buf[inRow];
                 for (int i = 1; i < nvRow; ++i)
                 {
                     float v = buf[inRow + i * 3];
@@ -305,16 +312,19 @@ namespace DotRecast.Recast
                 x0 = Math.Clamp(x0, -1, w - 1);
                 x1 = Math.Clamp(x1, 0, w - 1);
 
-                int nv, nv2 = nvRow;
+                int nv;
+                int nv2 = nvRow;
                 for (int x = x0; x <= x1; ++x)
                 {
                     // Clip polygon to column. store the remaining polygon as well
                     float cx = heightfieldBBMin.X + x * cellSize;
-                    DividePoly(buf, inRow, nv2, p1, out nv, p2, out nv2, cx + cellSize, 0);
+                    DividePoly(buf, inRow, nv2, p1, out nv, p2, out nv2, cx + cellSize, RcAxis.RC_AXIS_X);
                     (inRow, p2) = (p2, inRow);
 
                     if (nv < 3)
+                    {
                         continue;
+                    }
 
                     if (x < 0)
                     {
@@ -332,80 +342,89 @@ namespace DotRecast.Recast
 
                     spanMin -= heightfieldBBMin.Y;
                     spanMax -= heightfieldBBMin.Y;
+
                     // Skip the span if it is outside the heightfield bbox
                     if (spanMax < 0.0f)
+                    {
                         continue;
+                    }
+
                     if (spanMin > by)
+                    {
                         continue;
+                    }
+
                     // Clamp the span to the heightfield bbox.
                     if (spanMin < 0.0f)
+                    {
                         spanMin = 0;
+                    }
+
                     if (spanMax > by)
+                    {
                         spanMax = by;
+                    }
 
                     // Snap the span to the heightfield height grid.
-                    int spanMinCellIndex = Math.Clamp((int)MathF.Floor(spanMin * inverseCellHeight), 0, SPAN_MAX_HEIGHT);
-                    int spanMaxCellIndex = Math.Clamp((int)MathF.Ceiling(spanMax * inverseCellHeight), spanMinCellIndex + 1, SPAN_MAX_HEIGHT);
+                    int spanMinCellIndex = Math.Clamp((int)MathF.Floor(spanMin * inverseCellHeight), 0, RC_SPAN_MAX_HEIGHT);
+                    int spanMaxCellIndex = Math.Clamp((int)MathF.Ceiling(spanMax * inverseCellHeight), spanMinCellIndex + 1, RC_SPAN_MAX_HEIGHT);
 
-                    AddSpan(heightfield, x, z, spanMinCellIndex, spanMaxCellIndex, area, flagMergeThreshold);
-                }
+                    AddSpan(heightfield, x, z, spanMinCellIndex, spanMaxCellIndex, areaID, flagMergeThreshold);
                 }
             }
 
-        /**
-     * Rasterizes a single triangle into the specified heightfield. Calling this for each triangle in a mesh is less
-     * efficient than calling rasterizeTriangles. No spans will be added if the triangle does not overlap the
-     * heightfield grid.
-     *
-     * @param heightfield
-     *            An initialized heightfield.
-     * @param verts
-     *            An array with vertex coordinates [(x, y, z) * N]
-     * @param v0
-     *            Index of triangle vertex 0, will be multiplied by 3 to get vertex coordinates
-     * @param v1
-     *            Triangle vertex 1 index
-     * @param v2
-     *            Triangle vertex 2 index
-     * @param areaId
-     *            The area id of the triangle. [Limit: <= WALKABLE_AREA)
-     * @param flagMergeThreshold
-     *            The distance where the walkable flag is favored over the non-walkable flag. [Limit: >= 0] [Units: vx]
-     * @see Heightfield
-     */
-        public static void RasterizeTriangle(RcHeightfield heightfield, float[] verts, int v0, int v1, int v2, int area,
-            int flagMergeThreshold, RcTelemetry ctx)
+            return true;
+        }
+
+        /// Rasterizes a single triangle into the specified heightfield.
+        ///
+        /// Calling this for each triangle in a mesh is less efficient than calling rcRasterizeTriangles
+        ///
+        /// No spans will be added if the triangle does not overlap the heightfield grid.
+        ///
+        /// @see rcHeightfield
+        /// @ingroup recast
+        /// @param[in,out]	context				The build context to use during the operation.
+        /// @param[in]		v0					Triangle vertex 0 [(x, y, z)]
+        /// @param[in]		v1					Triangle vertex 1 [(x, y, z)]
+        /// @param[in]		v2					Triangle vertex 2 [(x, y, z)]
+        /// @param[in]		areaID				The area id of the triangle. [Limit: <= #RC_WALKABLE_AREA]
+        /// @param[in,out]	heightfield			An initialized heightfield.
+        /// @param[in]		flagMergeThreshold	The distance where the walkable flag is favored over the non-walkable flag.
+        /// 									[Limit: >= 0] [Units: vx]
+        /// @returns True if the operation completed successfully.
+        public static void RasterizeTriangle(RcContext context, float[] verts, int v0, int v1, int v2, int areaID,
+            RcHeightfield heightfield, int flagMergeThreshold)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
 
+            // Rasterize the single triangle.
             float inverseCellSize = 1.0f / heightfield.cs;
             float inverseCellHeight = 1.0f / heightfield.ch;
-            RasterizeTri(verts, v0, v1, v2, area, heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs, inverseCellSize,
+            RasterizeTri(verts, v0, v1, v2, areaID, heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs, inverseCellSize,
                 inverseCellHeight, flagMergeThreshold);
         }
 
-        /**
-     * Rasterizes an indexed triangle mesh into the specified heightfield. Spans will only be added for triangles that
-     * overlap the heightfield grid.
-     *
-     * @param heightfield
-     *            An initialized heightfield.
-     * @param verts
-     *            The vertices. [(x, y, z) * N]
-     * @param tris
-     *            The triangle indices. [(vertA, vertB, vertC) * nt]
-     * @param areaIds
-     *            The area id's of the triangles. [Limit: <= WALKABLE_AREA] [Size: numTris]
-     * @param numTris
-     *            The number of triangles.
-     * @param flagMergeThreshold
-     *            The distance where the walkable flag is favored over the non-walkable flag. [Limit: >= 0] [Units: vx]
-     * @see Heightfield
-     */
-        public static void RasterizeTriangles(RcHeightfield heightfield, float[] verts, int[] tris, int[] areaIds, int numTris,
-            int flagMergeThreshold, RcTelemetry ctx)
+        /// Rasterizes an indexed triangle mesh into the specified heightfield.
+        ///
+        /// Spans will only be added for triangles that overlap the heightfield grid.
+        /// 
+        /// @see rcHeightfield
+        /// @ingroup recast
+        /// @param[in,out]	context				The build context to use during the operation.
+        /// @param[in]		verts				The vertices. [(x, y, z) * @p nv]
+        /// @param[in]		numVerts			The number of vertices. (unused) TODO (graham): Remove in next major release
+        /// @param[in]		tris				The triangle indices. [(vertA, vertB, vertC) * @p nt]
+        /// @param[in]		triAreaIDs			The area id's of the triangles. [Limit: <= #RC_WALKABLE_AREA] [Size: @p nt]
+        /// @param[in]		numTris				The number of triangles.
+        /// @param[in,out]	heightfield			An initialized heightfield.
+        /// @param[in]		flagMergeThreshold	The distance where the walkable flag is favored over the non-walkable flag. 
+        ///										[Limit: >= 0] [Units: vx]
+        /// @returns True if the operation completed successfully.
+        public static void RasterizeTriangles(RcContext context, float[] verts, int[] tris, int[] triAreaIDs, int numTris,
+            RcHeightfield heightfield, int flagMergeThreshold)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
 
             float inverseCellSize = 1.0f / heightfield.cs;
             float inverseCellHeight = 1.0f / heightfield.ch;
@@ -414,33 +433,30 @@ namespace DotRecast.Recast
                 int v0 = tris[triIndex * 3 + 0];
                 int v1 = tris[triIndex * 3 + 1];
                 int v2 = tris[triIndex * 3 + 2];
-                RasterizeTri(verts, v0, v1, v2, areaIds[triIndex], heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs,
+                RasterizeTri(verts, v0, v1, v2, triAreaIDs[triIndex], heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs,
                     inverseCellSize, inverseCellHeight, flagMergeThreshold);
             }
         }
 
-        /**
-     * Rasterizes a triangle list into the specified heightfield. Expects each triangle to be specified as three
-     * sequential vertices of 3 floats. Spans will only be added for triangles that overlap the heightfield grid.
-     *
-     * @param heightfield
-     *            An initialized heightfield.
-     * @param verts
-     *            The vertices. [(x, y, z) * numVerts]
-     * @param areaIds
-     *            The area id's of the triangles. [Limit: <= WALKABLE_AREA] [Size: numTris]
-     * @param tris
-     *            The triangle indices. [(vertA, vertB, vertC) * nt]
-     * @param numTris
-     *            The number of triangles.
-     * @param flagMergeThreshold
-     *            The distance where the walkable flag is favored over the non-walkable flag. [Limit: >= 0] [Units: vx]
-     * @see Heightfield
-     */
-        public static void RasterizeTriangles(RcHeightfield heightfield, float[] verts, int[] areaIds, int numTris,
-            int flagMergeThreshold, RcTelemetry ctx)
+        /// Rasterizes a triangle list into the specified heightfield.
+        ///
+        /// Expects each triangle to be specified as three sequential vertices of 3 floats.
+        ///
+        /// Spans will only be added for triangles that overlap the heightfield grid.
+        /// 
+        /// @see rcHeightfield
+        /// @ingroup recast
+        /// @param[in,out]	context				The build context to use during the operation.
+        /// @param[in]		verts				The triangle vertices. [(ax, ay, az, bx, by, bz, cx, by, cx) * @p nt]
+        /// @param[in]		triAreaIDs			The area id's of the triangles. [Limit: <= #RC_WALKABLE_AREA] [Size: @p nt]
+        /// @param[in]		numTris				The number of triangles.
+        /// @param[in,out]	heightfield			An initialized heightfield.
+        /// @param[in]		flagMergeThreshold	The distance where the walkable flag is favored over the non-walkable flag. 
+        /// 									[Limit: >= 0] [Units: vx]
+        /// @returns True if the operation completed successfully.
+        public static void RasterizeTriangles(RcContext context, float[] verts, int[] triAreaIDs, int numTris, RcHeightfield heightfield, int flagMergeThreshold)
         {
-            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
+            using var timer = context.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
 
             float inverseCellSize = 1.0f / heightfield.cs;
             float inverseCellHeight = 1.0f / heightfield.ch;
@@ -449,7 +465,7 @@ namespace DotRecast.Recast
                 int v0 = (triIndex * 3 + 0);
                 int v1 = (triIndex * 3 + 1);
                 int v2 = (triIndex * 3 + 2);
-                RasterizeTri(verts, v0, v1, v2, areaIds[triIndex], heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs,
+                RasterizeTri(verts, v0, v1, v2, triAreaIDs[triIndex], heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs,
                     inverseCellSize, inverseCellHeight, flagMergeThreshold);
             }
         }

src/DotRecast.Recast/RcRegions.cs

@@ -274,8 +274,11 @@ namespace DotRecast.Recast
             return dst;
         }
 
-        private static bool FloodRegion(int x, int y, int i, int level, int r, RcCompactHeightfield chf, int[] srcReg,
-            int[] srcDist, List<int> stack)
+        private static bool FloodRegion(int x, int y, int i,
+            int level, int r,
+            RcCompactHeightfield chf,
+            int[] srcReg, int[] srcDist,
+            List<RcLevelStackEntry> stack)
         {
             int w = chf.width;
 
@@ -283,9 +286,7 @@ namespace DotRecast.Recast
 
             // Flood fill mark region.
             stack.Clear();
-            stack.Add(x);
-            stack.Add(y);
-            stack.Add(i);
+            stack.Add(new RcLevelStackEntry(x, y, i));
             srcReg[i] = r;
             srcDist[i] = 0;
 
@@ -294,13 +295,10 @@ namespace DotRecast.Recast
 
             while (stack.Count > 0)
             {
-                int ci = stack[^1];
-                stack.RemoveAt(stack.Count - 1);
-
-                int cy = stack[^1];
-                stack.RemoveAt(stack.Count - 1);
-
-                int cx = stack[^1];
+                RcLevelStackEntry back = stack[^1];
+                int cx = back.x;
+                int cy = back.y;
+                int ci = back.index;
                 stack.RemoveAt(stack.Count - 1);
 
 
@@ -381,9 +379,7 @@ namespace DotRecast.Recast
                         {
                             srcReg[ai] = r;
                             srcDist[ai] = 0;
-                            stack.Add(ax);
-                            stack.Add(ay);
-                            stack.Add(ai);
+                            stack.Add(new RcLevelStackEntry(ax, ay, ai));
                         }
                     }
                 }
@@ -392,8 +388,11 @@ namespace DotRecast.Recast
             return count > 0;
         }
 
-        private static int[] ExpandRegions(int maxIter, int level, RcCompactHeightfield chf, int[] srcReg, int[] srcDist,
-            List<int> stack, bool fillStack)
+        private static void ExpandRegions(int maxIter, int level,
+            RcCompactHeightfield chf,
+            int[] srcReg, int[] srcDist,
+            List<RcLevelStackEntry> stack,
+            bool fillStack)
         {
             int w = chf.width;
             int h = chf.height;
@@ -411,9 +410,7 @@ namespace DotRecast.Recast
                         {
                             if (chf.dist[i] >= level && srcReg[i] == 0 && chf.areas[i] != RC_NULL_AREA)
                             {
-                                stack.Add(x);
-                                stack.Add(y);
-                                stack.Add(i);
+                                stack.Add(new RcLevelStackEntry(x, y, i));
                             }
                         }
                     }
@@ -422,28 +419,28 @@ namespace DotRecast.Recast
             else // use cells in the input stack
             {
                 // mark all cells which already have a region
-                for (int j = 0; j < stack.Count; j += 3)
+                for (int j = 0; j < stack.Count; j++)
                 {
-                    int i = stack[j + 2];
+                    int i = stack[j].index;
                     if (srcReg[i] != 0)
                     {
-                        stack[j + 2] = -1;
+                        stack[j] = new RcLevelStackEntry(stack[j].x, stack[j].y, -1);
                     }
                 }
             }
 
-            List<int> dirtyEntries = new List<int>();
+            List<RcDirtyEntry> dirtyEntries = new List<RcDirtyEntry>();
             int iter = 0;
             while (stack.Count > 0)
             {
                 int failed = 0;
                 dirtyEntries.Clear();
 
-                for (int j = 0; j < stack.Count; j += 3)
+                for (int j = 0; j < stack.Count; j++)
                 {
-                    int x = stack[j + 0];
-                    int y = stack[j + 1];
-                    int i = stack[j + 2];
+                    int x = stack[j].x;
+                    int y = stack[j].y;
+                    int i = stack[j].index;
                     if (i < 0)
                     {
                         failed++;
@@ -481,10 +478,8 @@ namespace DotRecast.Recast
 
                     if (r != 0)
                     {
-                        stack[j + 2] = -1; // mark as used
-                        dirtyEntries.Add(i);
-                        dirtyEntries.Add(r);
-                        dirtyEntries.Add(d2);
+                        stack[j] = new RcLevelStackEntry(stack[j].x, stack[j].y, -1); // mark as used
+                        dirtyEntries.Add(new RcDirtyEntry(i, r, d2));
                     }
                     else
                     {
@@ -493,14 +488,14 @@ namespace DotRecast.Recast
                 }
 
                 // Copy entries that differ between src and dst to keep them in sync.
-                for (int i = 0; i < dirtyEntries.Count; i += 3)
+                for (int i = 0; i < dirtyEntries.Count; i++)
                 {
-                    int idx = dirtyEntries[i];
-                    srcReg[idx] = dirtyEntries[i + 1];
-                    srcDist[idx] = dirtyEntries[i + 2];
+                    int idx = dirtyEntries[i].index;
+                    srcReg[idx] = dirtyEntries[i].region;
+                    srcDist[idx] = dirtyEntries[i].distance2;
                 }
 
-                if (failed * 3 == stack.Count())
+                if (failed == stack.Count())
                 {
                     break;
                 }
@@ -514,12 +509,13 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            return srcReg;
         }
 
-        private static void SortCellsByLevel(int startLevel, RcCompactHeightfield chf, int[] srcReg, int nbStacks,
-            List<List<int>> stacks, int loglevelsPerStack) // the levels per stack (2 in our case) as a bit shift
+        private static void SortCellsByLevel(int startLevel,
+            RcCompactHeightfield chf,
+            int[] srcReg,
+            int nbStacks, List<List<RcLevelStackEntry>> stacks,
+            int loglevelsPerStack) // the levels per stack (2 in our case) as a bit shift
         {
             int w = chf.width;
             int h = chf.height;
@@ -555,27 +551,25 @@ namespace DotRecast.Recast
                             sId = 0;
                         }
 
-                        stacks[sId].Add(x);
-                        stacks[sId].Add(y);
-                        stacks[sId].Add(i);
+                        stacks[sId].Add(new RcLevelStackEntry(x, y, i));
                     }
                 }
             }
         }
 
-        private static void AppendStacks(List<int> srcStack, List<int> dstStack, int[] srcReg)
+        private static void AppendStacks(List<RcLevelStackEntry> srcStack,
+            List<RcLevelStackEntry> dstStack,
+            int[] srcReg)
         {
-            for (int j = 0; j < srcStack.Count; j += 3)
+            for (int j = 0; j < srcStack.Count; j++)
             {
-                int i = srcStack[j + 2];
+                int i = srcStack[j].index;
                 if ((i < 0) || (srcReg[i] != 0))
                 {
                     continue;
                 }
 
                 dstStack.Add(srcStack[j]);
-                dstStack.Add(srcStack[j + 1]);
-                dstStack.Add(srcStack[j + 2]);
             }
         }
 
@@ -847,7 +841,7 @@ namespace DotRecast.Recast
             }
         }
 
-        private static int MergeAndFilterRegions(RcTelemetry ctx, int minRegionArea, int mergeRegionSize, int maxRegionId,
+        private static int MergeAndFilterRegions(RcContext ctx, int minRegionArea, int mergeRegionSize, int maxRegionId,
             RcCompactHeightfield chf, int[] srcReg, List<int> overlaps)
         {
             int w = chf.width;
@@ -1169,7 +1163,7 @@ namespace DotRecast.Recast
             }
         }
 
-        private static int MergeAndFilterLayerRegions(RcTelemetry ctx, int minRegionArea, int maxRegionId, RcCompactHeightfield chf, int[] srcReg, List<int> overlaps)
+        private static bool MergeAndFilterLayerRegions(RcContext ctx, int minRegionArea, ref int maxRegionId, RcCompactHeightfield chf, int[] srcReg)
         {
             int w = chf.width;
             int h = chf.height;
@@ -1404,7 +1398,7 @@ namespace DotRecast.Recast
                 }
             }
 
-            return maxRegionId;
+            return true;
         }
 
         /// @par
@@ -1417,7 +1411,7 @@ namespace DotRecast.Recast
         /// and rcCompactHeightfield::dist fields.
         ///
         /// @see rcCompactHeightfield, rcBuildRegions, rcBuildRegionsMonotone
-        public static void BuildDistanceField(RcTelemetry ctx, RcCompactHeightfield chf)
+        public static void BuildDistanceField(RcContext ctx, RcCompactHeightfield chf)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_DISTANCEFIELD);
 
@@ -1478,7 +1472,7 @@ namespace DotRecast.Recast
         /// @warning The distance field must be created using #rcBuildDistanceField before attempting to build regions.
         ///
         /// @see rcCompactHeightfield, rcCompactSpan, rcBuildDistanceField, rcBuildRegionsMonotone, rcConfig
-        public static void BuildRegionsMonotone(RcTelemetry ctx, RcCompactHeightfield chf, int minRegionArea,
+        public static void BuildRegionsMonotone(RcContext ctx, RcCompactHeightfield chf, int minRegionArea,
             int mergeRegionArea)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS);
@@ -1660,7 +1654,7 @@ namespace DotRecast.Recast
         /// @warning The distance field must be created using #rcBuildDistanceField before attempting to build regions.
         ///
         /// @see rcCompactHeightfield, rcCompactSpan, rcBuildDistanceField, rcBuildRegionsMonotone, rcConfig
-        public static void BuildRegions(RcTelemetry ctx, RcCompactHeightfield chf, int minRegionArea,
+        public static void BuildRegions(RcContext ctx, RcCompactHeightfield chf, int minRegionArea,
             int mergeRegionArea)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS);
@@ -1673,13 +1667,13 @@ namespace DotRecast.Recast
 
             int LOG_NB_STACKS = 3;
             int NB_STACKS = 1 << LOG_NB_STACKS;
-            List<List<int>> lvlStacks = new List<List<int>>();
+            List<List<RcLevelStackEntry>> lvlStacks = new List<List<RcLevelStackEntry>>();
             for (int i = 0; i < NB_STACKS; ++i)
             {
-                lvlStacks.Add(new List<int>(1024));
+                lvlStacks.Add(new List<RcLevelStackEntry>(256));
             }
 
-            List<int> stack = new List<int>(1024);
+            List<RcLevelStackEntry> stack = new List<RcLevelStackEntry>(256);
 
             int[] srcReg = new int[chf.spanCount];
             int[] srcDist = new int[chf.spanCount];
@@ -1740,11 +1734,12 @@ namespace DotRecast.Recast
                 ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FLOOD);
 
                 // Mark new regions with IDs.
-                for (int j = 0; j < lvlStacks[sId].Count; j += 3)
+                for (int j = 0; j < lvlStacks[sId].Count; j++)
                 {
-                    int x = lvlStacks[sId][j];
-                    int y = lvlStacks[sId][j + 1];
-                    int i = lvlStacks[sId][j + 2];
+                    RcLevelStackEntry current = lvlStacks[sId][j];
+                    int x = current.x;
+                    int y = current.y;
+                    int i = current.index;
                     if (i >= 0 && srcReg[i] == 0)
                     {
                         if (FloodRegion(x, y, i, level, regionId, chf, srcReg, srcDist, stack))
@@ -1786,7 +1781,7 @@ namespace DotRecast.Recast
             }
         }
 
-        public static void BuildLayerRegions(RcTelemetry ctx, RcCompactHeightfield chf, int minRegionArea)
+        public static bool BuildLayerRegions(RcContext ctx, RcCompactHeightfield chf, int minRegionArea)
         {
             using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS);
 
@@ -1929,13 +1924,15 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
-
+            using (var timerFilter = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER))
+            {
                 // Merge monotone regions to layers and remove small regions.
-            List<int> overlaps = new List<int>();
-            chf.maxRegions = MergeAndFilterLayerRegions(ctx, minRegionArea, id, chf, srcReg, overlaps);
-
-            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
+                chf.maxRegions = id;
+                if (!MergeAndFilterLayerRegions(ctx, minRegionArea, ref chf.maxRegions, chf, srcReg))
+                {
+                    return false;
+                }
+            }
 
             // Store the result out.
             for (int i = 0; i < chf.spanCount; ++i)
@@ -1945,6 +1942,8 @@ namespace DotRecast.Recast
                     .WithReg(srcReg[i])
                     .Build();
             }
+
+            return true;
         }
     }
 }

src/DotRecast.Recast/RcVoxelizations.cs

@@ -25,7 +25,7 @@ namespace DotRecast.Recast
 {
     public static class RcVoxelizations
     {
-        public static RcHeightfield BuildSolidHeightfield(IInputGeomProvider geomProvider, RcBuilderConfig builderCfg, RcTelemetry ctx)
+        public static RcHeightfield BuildSolidHeightfield(RcContext ctx, IInputGeomProvider geomProvider, RcBuilderConfig builderCfg)
         {
             RcConfig cfg = builderCfg.cfg;
 
@@ -34,13 +34,10 @@ namespace DotRecast.Recast
 
             // Allocate array that can hold triangle area types.
             // If you have multiple meshes you need to process, allocate
-            // and array which can hold the max number of triangles you need to
-            // process.
+            // and array which can hold the max number of triangles you need to process.
 
-            // Find triangles which are walkable based on their slope and rasterize
-            // them.
-            // If your input data is multiple meshes, you can transform them here,
-            // calculate
+            // Find triangles which are walkable based on their slope and rasterize them.
+            // If your input data is multiple meshes, you can transform them here, calculate
             // the are type for each of the meshes and rasterize them.
             foreach (RcTriMesh geom in geomProvider.Meshes())
             {
@@ -59,7 +56,7 @@ namespace DotRecast.Recast
                         int[] tris = node.tris;
                         int ntris = tris.Length / 3;
                         int[] m_triareas = RcCommons.MarkWalkableTriangles(ctx, cfg.WalkableSlopeAngle, verts, tris, ntris, cfg.WalkableAreaMod);
-                        RcRasterizations.RasterizeTriangles(solid, verts, tris, m_triareas, ntris, cfg.WalkableClimb, ctx);
+                        RcRasterizations.RasterizeTriangles(ctx, verts, tris, m_triareas, ntris, solid, cfg.WalkableClimb);
                     }
                 }
                 else
@@ -67,7 +64,7 @@ namespace DotRecast.Recast
                     int[] tris = geom.GetTris();
                     int ntris = tris.Length / 3;
                     int[] m_triareas = RcCommons.MarkWalkableTriangles(ctx, cfg.WalkableSlopeAngle, verts, tris, ntris, cfg.WalkableAreaMod);
-                    RcRasterizations.RasterizeTriangles(solid, verts, tris, m_triareas, ntris, cfg.WalkableClimb, ctx);
+                    RcRasterizations.RasterizeTriangles(ctx, verts, tris, m_triareas, ntris, solid, cfg.WalkableClimb);
                 }
             }
 

test/DotRecast.Core.Test/DotRecast.Core.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Core.Test/RcArrayBenchmarkTests.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Buffers;
+using System.Collections.Generic;
+using DotRecast.Core.Buffers;
+using DotRecast.Core.Collections;
+using NUnit.Framework;
+
+namespace DotRecast.Core.Test;
+
+public class RcArrayBenchmarkTests
+{
+    private const int StepLength = 512;
+    private const int RandomLoop = 1000;
+    private readonly RcRand _rand = new RcRand();
+
+    private (string title, long ticks) Bench(string title, Action<int> source)
+    {
+        var begin = RcFrequency.Ticks;
+        for (int step = StepLength; step > 0; --step)
+        {
+            for (int i = 0; i < RandomLoop; ++i)
+            {
+                source.Invoke(step);
+            }
+        }
+
+        var end = RcFrequency.Ticks - begin;
+        return (title, end);
+    }
+
+
+    private void RoundForArray(int len)
+    {
+        var array = new int[len];
+        for (int ii = 0; ii < len; ++ii)
+        {
+            array[ii] = _rand.NextInt32();
+        }
+    }
+
+
+    private void RoundForPureRentArray(int len)
+    {
+        var array = ArrayPool<int>.Shared.Rent(len);
+        for (int ii = 0; ii < array.Length; ++ii)
+        {
+            array[ii] = _rand.NextInt32();
+        }
+
+        ArrayPool<int>.Shared.Return(array);
+    }
+
+
+    private void RoundForRcRentedArray(int len)
+    {
+        using var rentedArray = RcRentedArray.Rent<int>(len);
+        var array = rentedArray.AsArray();
+        for (int i = 0; i < rentedArray.Length; ++i)
+        {
+            array[i] = _rand.NextInt32();
+        }
+    }
+
+
+    private void RoundForRcStackArray(int len)
+    {
+        var array = new RcStackArray512<int>();
+        for (int ii = 0; ii < len; ++ii)
+        {
+            array[ii] = _rand.NextInt32();
+        }
+    }
+
+    private void RoundForStackalloc(int len)
+    {
+        Span<int> array = stackalloc int[len];
+        for (int ii = 0; ii < len; ++ii)
+        {
+            array[ii] = _rand.NextInt32();
+        }
+    }
+
+
+    [Test]
+    public void TestBenchmarkArrays()
+    {
+        var list = new List<(string title, long ticks)>();
+        list.Add(Bench("new int[len]", RoundForArray));
+        list.Add(Bench("ArrayPool<int>.Shared.Rent(len)", RoundForPureRentArray));
+        list.Add(Bench("RcRentedArray.Rent<int>(len)", RoundForRcRentedArray));
+        list.Add(Bench("new RcStackArray512<int>()", RoundForRcStackArray));
+        list.Add(Bench("stackalloc int[len]", RoundForStackalloc));
+
+        list.Sort((x, y) => x.ticks.CompareTo(y.ticks));
+
+        foreach (var t in list)
+        {
+            Console.WriteLine($"{t.title} {t.ticks / (double)TimeSpan.TicksPerMillisecond} ms");
+        }
+    }
+}

test/DotRecast.Core.Test/RcCyclicBufferTest.cs

@@ -0,0 +1,449 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using DotRecast.Core.Buffers;
+using DotRecast.Core.Collections;
+using NUnit.Framework;
+
+namespace DotRecast.Core.Test;
+
+// https://github.com/joaoportela/CircularBuffer-CSharp/blob/master/CircularBuffer.Tests/CircularBufferTests.cs
+public class RcCyclicBufferTests
+{
+    [Test]
+    public void RcCyclicBuffer_GetEnumeratorConstructorCapacity_ReturnsEmptyCollection()
+    {
+        var buffer = new RcCyclicBuffer<string>(5);
+        Assert.That(buffer.ToArray(), Is.Empty);
+    }
+
+    [Test]
+    public void RcCyclicBuffer_ConstructorSizeIndexAccess_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3 });
+
+        Assert.That(buffer.Capacity, Is.EqualTo(5));
+        Assert.That(buffer.Size, Is.EqualTo(4));
+        for (int i = 0; i < 4; i++)
+        {
+            Assert.That(buffer[i], Is.EqualTo(i));
+        }
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Constructor_ExceptionWhenSourceIsLargerThanCapacity()
+    {
+        Assert.Throws<ArgumentException>(() => new RcCyclicBuffer<int>(3, new[] { 0, 1, 2, 3 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_GetEnumeratorConstructorDefinedArray_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3 });
+
+        int x = 0;
+        foreach (var item in buffer)
+        {
+            Assert.That(item, Is.EqualTo(x));
+            x++;
+        }
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PushBack_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        for (int i = 0; i < 5; i++)
+        {
+            buffer.PushBack(i);
+        }
+
+        Assert.That(buffer.Front(), Is.EqualTo(0));
+        for (int i = 0; i < 5; i++)
+        {
+            Assert.That(buffer[i], Is.EqualTo(i));
+        }
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PushBackOverflowingBuffer_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        for (int i = 0; i < 10; i++)
+        {
+            buffer.PushBack(i);
+        }
+
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 5, 6, 7, 8, 9 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_GetEnumeratorOverflowedArray_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        for (int i = 0; i < 10; i++)
+        {
+            buffer.PushBack(i);
+        }
+
+        // buffer should have [5,6,7,8,9]
+        int x = 5;
+        buffer.ForEach(item =>
+        {
+            Assert.That(item, Is.EqualTo(x));
+            x++;
+        });
+    }
+
+    [Test]
+    public void RcCyclicBuffer_ToArrayConstructorDefinedArray_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3 });
+
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 0, 1, 2, 3 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_ToArrayOverflowedBuffer_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        for (int i = 0; i < 10; i++)
+        {
+            buffer.PushBack(i);
+        }
+
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 5, 6, 7, 8, 9 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PushFront_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        for (int i = 0; i < 5; i++)
+        {
+            buffer.PushFront(i);
+        }
+
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 4, 3, 2, 1, 0 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PushFrontAndOverflow_CorrectContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        for (int i = 0; i < 10; i++)
+        {
+            buffer.PushFront(i);
+        }
+
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 9, 8, 7, 6, 5 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Front_CorrectItem()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+
+        Assert.That(buffer.Front(), Is.EqualTo(0));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Back_CorrectItem()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+        Assert.That(buffer.Back(), Is.EqualTo(4));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_BackOfBufferOverflowByOne_CorrectItem()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+        buffer.PushBack(42);
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 1, 2, 3, 4, 42 }));
+        Assert.That(buffer.Back(), Is.EqualTo(42));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Front_EmptyBufferThrowsException()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+
+        Assert.Throws<InvalidOperationException>(() => buffer.Front());
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Back_EmptyBufferThrowsException()
+    {
+        var buffer = new RcCyclicBuffer<int>(5);
+        Assert.Throws<InvalidOperationException>(() => buffer.Back());
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PopBack_RemovesBackElement()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+
+        Assert.That(buffer.Size, Is.EqualTo(5));
+
+        buffer.PopBack();
+
+        Assert.That(buffer.Size, Is.EqualTo(4));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 0, 1, 2, 3 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PopBackInOverflowBuffer_RemovesBackElement()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+        buffer.PushBack(5);
+
+        Assert.That(buffer.Size, Is.EqualTo(5));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 1, 2, 3, 4, 5 }));
+
+        buffer.PopBack();
+
+        Assert.That(buffer.Size, Is.EqualTo(4));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 1, 2, 3, 4 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PopFront_RemovesBackElement()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+
+        Assert.That(buffer.Size, Is.EqualTo(5));
+
+        buffer.PopFront();
+
+        Assert.That(buffer.Size, Is.EqualTo(4));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 1, 2, 3, 4 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_PopFrontInOverflowBuffer_RemovesBackElement()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+        buffer.PushFront(5);
+
+        Assert.That(buffer.Size, Is.EqualTo(5));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 5, 0, 1, 2, 3 }));
+
+        buffer.PopFront();
+
+        Assert.That(buffer.Size, Is.EqualTo(4));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 0, 1, 2, 3 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_SetIndex_ReplacesElement()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+
+        buffer[1] = 10;
+        buffer[3] = 30;
+
+        Assert.That(buffer.ToArray(), Is.EqualTo(new[] { 0, 10, 2, 30, 4 }));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_WithDifferentSizeAndCapacity_BackReturnsLastArrayPosition()
+    {
+        // test to confirm this issue does not happen anymore:
+        // https://github.com/joaoportela/RcCyclicBuffer-CSharp/issues/2
+
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 0, 1, 2, 3, 4 });
+
+        buffer.PopFront(); // (make size and capacity different)
+
+        Assert.That(buffer.Back(), Is.EqualTo(4));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Clear_ClearsContent()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 4, 3, 2, 1, 0 });
+
+        buffer.Clear();
+
+        Assert.That(buffer.Size, Is.EqualTo(0));
+        Assert.That(buffer.Capacity, Is.EqualTo(5));
+        Assert.That(buffer.ToArray(), Is.EqualTo(new int[0]));
+    }
+
+    [Test]
+    public void RcCyclicBuffer_Clear_WorksNormallyAfterClear()
+    {
+        var buffer = new RcCyclicBuffer<int>(5, new[] { 4, 3, 2, 1, 0 });
+
+        buffer.Clear();
+        for (int i = 0; i < 5; i++)
+        {
+            buffer.PushBack(i);
+        }
+
+        Assert.That(buffer.Front(), Is.EqualTo(0));
+        for (int i = 0; i < 5; i++)
+        {
+            Assert.That(buffer[i], Is.EqualTo(i));
+        }
+    }
+
+    [Test]
+    public void RcCyclicBuffer_RegularForEachWorks()
+    {
+        var refValues = new[] { 4, 3, 2, 1, 0 };
+        var buffer = new RcCyclicBuffer<int>(5, refValues);
+
+        var index = 0;
+        foreach (var element in buffer)
+        {
+            Assert.That(element, Is.EqualTo(refValues[index++]));
+        }
+    }
+
+    [Test]
+    public void RcCyclicBuffer_EnumeratorWorks()
+    {
+        var refValues = new int[] { 4, 3, 2, 1, 0 };
+        var buffer = new RcCyclicBuffer<int>(5, refValues);
+
+
+        var index = 0;
+        using var enumerator = buffer.GetEnumerator();
+        enumerator.Reset();
+        while (enumerator.MoveNext())
+        {
+            Assert.That(enumerator.Current, Is.EqualTo(refValues[index++]));
+        }
+
+        // Ensure Reset works properly
+        index = 0;
+        enumerator.Reset();
+        while (enumerator.MoveNext())
+        {
+            Assert.That(enumerator.Current, Is.EqualTo(refValues[index++]));
+        }
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_Sum()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Sum(buffer), Is.EqualTo(refValues.Sum()));
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_Average()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Average(buffer), Is.EqualTo(refValues.Average()));
+    }
+
+    [Test]
+    public void RcCyclicBuffers_Min()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Min(buffer), Is.EqualTo(refValues.Min()));
+    }
+
+    [Test]
+    public void RcCyclicBuffers_Max()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Max(buffer), Is.EqualTo(refValues.Max()));
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_SumUnaligned()
+    {
+        var refValues = Enumerable.Range(-1, 3).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Sum(buffer), Is.EqualTo(refValues.Sum()));
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_AverageUnaligned()
+    {
+        var refValues = Enumerable.Range(-1, 3).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Average(buffer), Is.EqualTo(refValues.Average()));
+    }
+
+    [Test]
+    public void RcCyclicBuffers_MinUnaligned()
+    {
+        var refValues = Enumerable.Range(5, 3).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Min(buffer), Is.EqualTo(refValues.Min()));
+    }
+
+    [Test]
+    public void RcCyclicBuffers_MaxUnaligned()
+    {
+        var refValues = Enumerable.Range(-5, 3).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        Assert.That(RcCyclicBuffers.Max(buffer), Is.EqualTo(refValues.Max()));
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_SumDeleted()
+    {
+        var initialValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var refValues = initialValues.Skip(1).SkipLast(1).ToArray();
+        var buffer = new RcCyclicBuffer<long>(initialValues.Length, initialValues);
+        buffer.PopBack();
+        buffer.PopFront();
+        
+        Assert.That(RcCyclicBuffers.Sum(buffer), Is.EqualTo(refValues.Sum()));
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_SumSplit()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        buffer.PopFront();
+        buffer.PushBack(refValues[0]);
+        Assert.That(RcCyclicBuffers.Sum(buffer), Is.EqualTo(refValues.Sum()));
+    }
+    
+    [Test]
+    public void RcCyclicBuffers_AverageSplit()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        buffer.PopFront();
+        buffer.PushBack(refValues[0]);
+        Assert.That(RcCyclicBuffers.Average(buffer), Is.EqualTo(refValues.Average()));
+    }
+
+    [Test]
+    public void RcCyclicBuffers_MinSplit()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        buffer.PopFront();
+        buffer.PushBack(refValues[0]);
+        Assert.That(RcCyclicBuffers.Min(buffer), Is.EqualTo(refValues.Min()));
+    }
+
+    [Test]
+    public void RcCyclicBuffers_MaxSplit()
+    {
+        var refValues = Enumerable.Range(-100, 211).Select(x => (long)x).ToArray();
+        var buffer = new RcCyclicBuffer<long>(refValues.Length, refValues);
+        buffer.PopFront();
+        buffer.PushBack(refValues[0]);
+        Assert.That(RcCyclicBuffers.Max(buffer), Is.EqualTo(refValues.Max()));
+    }
+}

test/DotRecast.Core.Test/RcHashCodesTest.cs

@@ -0,0 +1,40 @@
+using NUnit.Framework;
+
+namespace DotRecast.Core.Test;
+
+public class RcHashCodesTest
+{
+    [Test]
+    public void TestCombineHashCodes()
+    {
+        Assert.That(RcHashCodes.CombineHashCodes(0, 0), Is.EqualTo(0));
+        Assert.That(RcHashCodes.CombineHashCodes(int.MaxValue, int.MaxValue), Is.EqualTo(32));
+        Assert.That(RcHashCodes.CombineHashCodes(int.MaxValue, int.MinValue), Is.EqualTo(-33));
+        Assert.That(RcHashCodes.CombineHashCodes(int.MinValue, int.MinValue), Is.EqualTo(0));
+        Assert.That(RcHashCodes.CombineHashCodes(int.MinValue, int.MaxValue), Is.EqualTo(-1));
+        Assert.That(RcHashCodes.CombineHashCodes(int.MaxValue / 2, int.MaxValue / 2), Is.EqualTo(32));
+    }
+
+    [Test]
+    public void TestIntHash()
+    {
+        Assert.That(RcHashCodes.WangHash(0), Is.EqualTo(4158654902));
+        Assert.That(RcHashCodes.WangHash(1), Is.EqualTo(357654460));
+        Assert.That(RcHashCodes.WangHash(2), Is.EqualTo(715307540));
+        Assert.That(RcHashCodes.WangHash(3), Is.EqualTo(1072960876));
+        
+        Assert.That(RcHashCodes.WangHash(4), Is.EqualTo(1430614333));
+        Assert.That(RcHashCodes.WangHash(5), Is.EqualTo(1788267159));
+        Assert.That(RcHashCodes.WangHash(6), Is.EqualTo(2145921005));
+        Assert.That(RcHashCodes.WangHash(7), Is.EqualTo(2503556531));
+        
+        Assert.That(RcHashCodes.WangHash(8), Is.EqualTo(2861226262));
+        Assert.That(RcHashCodes.WangHash(9), Is.EqualTo(3218863982));
+        Assert.That(RcHashCodes.WangHash(10), Is.EqualTo(3576533554));
+        Assert.That(RcHashCodes.WangHash(11), Is.EqualTo(3934169234));
+        
+        //
+        Assert.That(RcHashCodes.WangHash(int.MaxValue), Is.EqualTo(1755403298));
+        Assert.That(RcHashCodes.WangHash(uint.MaxValue), Is.EqualTo(3971045735));
+    }
+}

test/DotRecast.Core.Test/RcRentedArrayTest.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using DotRecast.Core.Buffers;
+using NUnit.Framework;
+
+namespace DotRecast.Core.Test;
+
+public class RcRentedArrayTest
+{
+    public List<int> RandomValues(int length)
+    {
+        var rand = new RcRand();
+
+        // excepted values
+        var list = new List<int>();
+        for (int i = 0; i < length; ++i)
+        {
+            list.Add(rand.NextInt32());
+        }
+
+        return list;
+    }
+
+    [Test]
+    public void TestRentedArray()
+    {
+        var rand = new RcRand();
+        for (int loop = 0; loop < 1024; ++loop)
+        {
+            RcRentedArray<int> rentedArray;
+            {
+                int length = Math.Max(2, (int)(rand.Next() * 2048));
+                var values = RandomValues(length);
+                using var array = RcRentedArray.Rent<int>(length);
+
+                for (int i = 0; i < array.Length; ++i)
+                {
+                    array[i] = values[i];
+                }
+
+                for (int i = 0; i < array.Length; ++i)
+                {
+                    Assert.That(array[i], Is.EqualTo(values[i]));
+                }
+
+                Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+                Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+                Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+                Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+                Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+
+                // danger
+                rentedArray = array;
+            }
+            Assert.Throws<NullReferenceException>(() => rentedArray[^1] = 0);
+        }
+    }
+}

test/DotRecast.Core.Test/RcSortedQueueTest.cs

@@ -0,0 +1,114 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using DotRecast.Core.Collections;
+using NUnit.Framework;
+
+namespace DotRecast.Core.Test;
+
+public class RcSortedQueueTest
+{
+    [Test]
+    public void TestEnqueueAndDequeue()
+    {
+        var sortedQueue = new RcSortedQueue<int>((a, b) => a.CompareTo(b));
+
+        var r = new RcRand();
+        var expectedList = new List<int>();
+        for (int i = 0; i < 999; ++i)
+        {
+            expectedList.Add(r.NextInt32() % 300); // allow duplication 
+        }
+
+        // ready
+        foreach (var expected in expectedList)
+        {
+            sortedQueue.Enqueue(expected);
+        }
+
+        expectedList.Sort();
+
+        // check count
+        Assert.That(sortedQueue.Count(), Is.EqualTo(expectedList.Count));
+        Assert.That(sortedQueue.IsEmpty(), Is.False);
+
+        Assert.That(sortedQueue.ToList(), Is.EqualTo(expectedList));
+
+        // check Peek and Dequeue
+        for (int i = 0; i < expectedList.Count; ++i)
+        {
+            Assert.That(sortedQueue.Peek(), Is.EqualTo(expectedList[i]));
+            Assert.That(sortedQueue.Count(), Is.EqualTo(expectedList.Count - i));
+
+            Assert.That(sortedQueue.Dequeue(), Is.EqualTo(expectedList[i]));
+            Assert.That(sortedQueue.Count(), Is.EqualTo(expectedList.Count - i - 1));
+        }
+
+        // check count
+        Assert.That(sortedQueue.Count(), Is.EqualTo(0));
+        Assert.That(sortedQueue.IsEmpty(), Is.True);
+    }
+
+    [Test]
+    public void TestRemoveForValueType()
+    {
+        var sortedQueue = new RcSortedQueue<int>((a, b) => a.CompareTo(b));
+
+        var r = new RcRand();
+        var expectedList = new List<int>();
+        for (int i = 0; i < 999; ++i)
+        {
+            expectedList.Add(r.NextInt32() % 300); // allow duplication 
+        }
+
+        // ready
+        foreach (var expected in expectedList)
+        {
+            sortedQueue.Enqueue(expected);
+        }
+
+        expectedList.Shuffle();
+
+        // check
+        Assert.That(sortedQueue.Count(), Is.EqualTo(expectedList.Count));
+
+        foreach (var expected in expectedList)
+        {
+            Assert.That(sortedQueue.Remove(expected), Is.True);
+        }
+
+        Assert.That(sortedQueue.IsEmpty(), Is.True);
+    }
+
+    [Test]
+    public void TestRemoveForReferenceType()
+    {
+        var sortedQueue = new RcSortedQueue<RcAtomicLong>((a, b) => a.Read().CompareTo(b.Read()));
+
+        var r = new RcRand();
+        var expectedList = new List<RcAtomicLong>();
+        for (int i = 0; i < 999; ++i)
+        {
+            expectedList.Add(new RcAtomicLong(r.NextInt32() % 300)); // allow duplication 
+        }
+
+        // ready
+        foreach (var expected in expectedList)
+        {
+            sortedQueue.Enqueue(expected);
+        }
+
+        expectedList.Shuffle();
+
+        // check
+        Assert.That(sortedQueue.Count(), Is.EqualTo(expectedList.Count));
+
+        foreach (var expected in expectedList)
+        {
+            Assert.That(sortedQueue.Remove(expected), Is.True);
+        }
+
+        Assert.That(sortedQueue.IsEmpty(), Is.True);
+    }
+
+}

test/DotRecast.Core.Test/RcStackArrayTest.cs

@@ -0,0 +1,272 @@
+using System;
+using System.Collections.Generic;
+using DotRecast.Core.Collections;
+using NUnit.Framework;
+
+namespace DotRecast.Core.Test;
+
+
+public class RcStackArrayTest
+{
+    public List<int> RandomValues(int size)
+    {
+        var rand = new RcRand();
+
+        // excepted values
+        var list = new List<int>();
+        for (int i = 0; i < size; ++i)
+        {
+            list.Add(rand.NextInt32());
+        }
+
+        return list;
+    }
+
+    [Test]
+    public void TestStackOverflow()
+    {
+        // normal
+        var array_128_512_1 = RcStackArray2<RcStackArray512<float>>.Empty; // 128 * 512 = 65536
+        
+        // warn
+        //var array_128_512_2 = RcStackArray128<RcStackArray512<float>>.Empty; // 128 * 512 = 65536
+
+        // danger
+        // var array_32_512_1 = RcStackArray32<RcStackArray512<float>>.Empty; // 32 * 512 = 16384
+        // var array_16_512_1 = RcStackArray16<RcStackArray512<float>>.Empty; // 16 * 512 = 8192
+        // var array_8_512_1 = RcStackArray8<RcStackArray512<float>>.Empty; // 8 * 512 = 4196
+        // var array_4_256_1 = RcStackArray4<RcStackArray256<float>>.Empty; // 4 * 256 = 1024
+        // var array_4_64_1 = RcStackArray4<RcStackArray64<float>>.Empty; // 4 * 64 = 256
+        // var array_2_8_1 = RcStackArray2<RcStackArray8<float>>.Empty; // 2 * 8 = 16
+        // var array_2_4_1 = RcStackArray2<RcStackArray2<float>>.Empty; // 2 * 2 = 4
+
+        float f1 = 0.0f; // 1
+        //float f2 = 0.0f; // my system stack overflow!
+        Assert.That(f1, Is.EqualTo(0.0f));
+    }
+
+    [Test]
+    public void TestRcStackArray2()
+    {
+        var array = RcStackArray2<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(2));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray4()
+    {
+        var array = RcStackArray4<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(4));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray8()
+    {
+        var array = RcStackArray8<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(8));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray16()
+    {
+        var array = RcStackArray16<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(16));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray32()
+    {
+        var array = RcStackArray32<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(32));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray64()
+    {
+        var array = RcStackArray64<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(64));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray128()
+    {
+        var array = RcStackArray128<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(128));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray256()
+    {
+        var array = RcStackArray256<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(256));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+
+    [Test]
+    public void TestRcStackArray512()
+    {
+        var array = RcStackArray512<int>.Empty;
+        Assert.That(array.Length, Is.EqualTo(512));
+
+        var values = RandomValues(array.Length);
+        for (int i = 0; i < array.Length; ++i)
+        {
+            array[i] = values[i];
+        }
+
+        for (int i = 0; i < array.Length; ++i)
+        {
+            Assert.That(array[i], Is.EqualTo(values[i]));
+        }
+
+        Assert.That(array[^1], Is.EqualTo(values[^1]));
+
+        Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
+    }
+}

test/DotRecast.Core.Test/Vector3Test.cs

@@ -1,19 +1,18 @@
 using System;
 using System.Numerics;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Core.Test;
 
-public class Vector3Tests
+public class Vector3Test
 {
     [Test]
     [Repeat(100000)]
     public void TestVectorLength()
     {
         var v1 = new Vector3(Random.Shared.NextSingle(), Random.Shared.NextSingle(), Random.Shared.NextSingle());
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
 
         Assert.That(v1.Length(), Is.EqualTo(v11.Length()));
         Assert.That(v1.LengthSquared(), Is.EqualTo(v11.LengthSquared()));
@@ -29,9 +28,9 @@ public class Vector3Tests
         var v4 = v1 - v2;
         Assert.That(v3, Is.EqualTo(v4));
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var v33 = Vector3.Subtract(v11, v22);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var v33 = RcVec3f.Subtract(v11, v22);
         var v44 = v11 - v22;
         Assert.That(v33, Is.EqualTo(v44));
 
@@ -51,9 +50,9 @@ public class Vector3Tests
         var v4 = v1 + v2;
         Assert.That(v3, Is.EqualTo(v4));
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var v33 = Vector3.Add(v11, v22);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var v33 = RcVec3f.Add(v11, v22);
         var v44 = v11 + v22;
         Assert.That(v33, Is.EqualTo(v44));
 
@@ -69,8 +68,8 @@ public class Vector3Tests
         var v1 = new Vector3(Random.Shared.NextSingle(), Random.Shared.NextSingle(), Random.Shared.NextSingle());
         var v2 = Vector3.Normalize(v1);
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = Vector3.Normalize(v11);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = RcVec3f.Normalize(v11);
 
         Assert.That(v2.X, Is.EqualTo(v22.X).Within(0.000001d));
         Assert.That(v2.Y, Is.EqualTo(v22.Y).Within(0.000001d));
@@ -85,9 +84,9 @@ public class Vector3Tests
         var v2 = new Vector3(Random.Shared.NextSingle(), Random.Shared.NextSingle(), Random.Shared.NextSingle());
         var v3 = Vector3.Cross(v1, v2);
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var v33 = Vector3.Cross(v11, v22);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var v33 = RcVec3f.Cross(v11, v22);
 
         Assert.That(v3.X, Is.EqualTo(v33.X));
         Assert.That(v3.Y, Is.EqualTo(v33.Y));
@@ -104,7 +103,7 @@ public class Vector3Tests
         v1.CopyTo(array1);
         v1.CopyTo(array2, 0);
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
         var array11 = new float[3];
         var array22 = new float[3];
         v11.CopyTo(array11);
@@ -122,9 +121,9 @@ public class Vector3Tests
         var v2 = new Vector3(Random.Shared.NextSingle(), Random.Shared.NextSingle(), Random.Shared.NextSingle());
         float d3 = Vector3.Dot(v1, v2);
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var d33 = Vector3.Dot(v11, v22);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var d33 = RcVec3f.Dot(v11, v22);
 
         Assert.That(d3, Is.EqualTo(d33));
     }
@@ -138,10 +137,10 @@ public class Vector3Tests
         var d3 = Vector3.Distance(v1, v2);
         var d4 = Vector3.DistanceSquared(v1, v2);
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var d33 = Vector3.Distance(v11, v22);
-        var d44 = Vector3.DistanceSquared(v11, v22);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var d33 = RcVec3f.Distance(v11, v22);
+        var d44 = RcVec3f.DistanceSquared(v11, v22);
 
         Assert.That(d3, Is.EqualTo(d33));
         Assert.That(d4, Is.EqualTo(d44));
@@ -156,10 +155,10 @@ public class Vector3Tests
         var v3 = Vector3.Min(v1, v2);
         var v4 = Vector3.Max(v1, v2);
 
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var v33 = Vector3.Min(v11, v22);
-        var v44 = Vector3.Max(v11, v22);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var v33 = RcVec3f.Min(v11, v22);
+        var v44 = RcVec3f.Max(v11, v22);
         
         Assert.That(v3.X, Is.EqualTo(v33.X));
         Assert.That(v3.Y, Is.EqualTo(v33.Y));
@@ -180,9 +179,9 @@ public class Vector3Tests
         var v2 = new Vector3(Random.Shared.NextSingle(), Random.Shared.NextSingle(), Random.Shared.NextSingle());
         var v3 = Vector3.Lerp(v1, v2, amt);
     
-        var v11 = new Vector3(v1.X, v1.Y, v1.Z);
-        var v22 = new Vector3(v2.X, v2.Y, v2.Z);
-        var v33 = Vector3.Lerp(v11, v22, amt);
+        var v11 = new RcVec3f(v1.X, v1.Y, v1.Z);
+        var v22 = new RcVec3f(v2.X, v2.Y, v2.Z);
+        var v33 = RcVec3f.Lerp(v11, v22, amt);
     
         Assert.That(v3.X, Is.EqualTo(v33.X));
         Assert.That(v3.Y, Is.EqualTo(v33.Y));

test/DotRecast.Detour.Crowd.Test/AbstractCrowdTest.cs

@@ -21,12 +21,11 @@ freely, subject to the following restrictions:
 using System;
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Crowd.Test;
 
-[Parallelizable]
+
 public class AbstractCrowdTest
 {
     protected readonly long[] startRefs =
@@ -37,22 +36,22 @@ public class AbstractCrowdTest
 
     protected readonly long[] endRefs = { 281474976710721L, 281474976710767L, 281474976710758L, 281474976710731L, 281474976710772L };
 
-    protected readonly Vector3[] startPoss =
+    protected readonly RcVec3f[] startPoss =
     {
-        new Vector3(22.60652f, 10.197294f, -45.918674f),
-        new Vector3(22.331268f, 10.197294f, -1.0401875f),
-        new Vector3(18.694363f, 15.803535f, -73.090416f),
-        new Vector3(0.7453353f, 10.197294f, -5.94005f),
-        new Vector3(-20.651257f, 5.904126f, -13.712508f),
+        new RcVec3f(22.60652f, 10.197294f, -45.918674f),
+        new RcVec3f(22.331268f, 10.197294f, -1.0401875f),
+        new RcVec3f(18.694363f, 15.803535f, -73.090416f),
+        new RcVec3f(0.7453353f, 10.197294f, -5.94005f),
+        new RcVec3f(-20.651257f, 5.904126f, -13.712508f),
     };
 
-    protected readonly Vector3[] endPoss =
+    protected readonly RcVec3f[] endPoss =
     {
-        new Vector3(6.4576626f, 10.197294f, -18.33406f),
-        new Vector3(-5.8023443f, 0.19729415f, 3.008419f),
-        new Vector3(38.423977f, 10.197294f, -0.116066754f),
-        new Vector3(0.8635526f, 10.197294f, -10.31032f),
-        new Vector3(18.784092f, 10.197294f, 3.0543678f),
+        new RcVec3f(6.4576626f, 10.197294f, -18.33406f),
+        new RcVec3f(-5.8023443f, 0.19729415f, 3.008419f),
+        new RcVec3f(38.423977f, 10.197294f, -0.116066754f),
+        new RcVec3f(0.8635526f, 10.197294f, -10.31032f),
+        new RcVec3f(18.784092f, 10.197294f, 3.0543678f),
     };
 
     protected DtMeshData nmd;
@@ -111,14 +110,14 @@ public class AbstractCrowdTest
         return ap;
     }
 
-    protected void AddAgentGrid(int size, float distance, int updateFlags, int obstacleAvoidanceType, Vector3 startPos)
+    protected void AddAgentGrid(int size, float distance, int updateFlags, int obstacleAvoidanceType, RcVec3f startPos)
     {
         DtCrowdAgentParams ap = GetAgentParams(updateFlags, obstacleAvoidanceType);
         for (int i = 0; i < size; i++)
         {
             for (int j = 0; j < size; j++)
             {
-                Vector3 pos = new Vector3();
+                RcVec3f pos = new RcVec3f();
                 pos.X = startPos.X + i * distance;
                 pos.Y = startPos.Y;
                 pos.Z = startPos.Z + j * distance;
@@ -127,15 +126,15 @@ public class AbstractCrowdTest
         }
     }
 
-    protected void SetMoveTarget(Vector3 pos, bool adjust)
+    protected void SetMoveTarget(RcVec3f pos, bool adjust)
     {
-        Vector3 ext = crowd.GetQueryExtents();
+        RcVec3f ext = crowd.GetQueryExtents();
         IDtQueryFilter filter = crowd.GetFilter(0);
         if (adjust)
         {
             foreach (DtCrowdAgent ag in crowd.GetActiveAgents())
             {
-                Vector3 vel = CalcVel(ag.npos, pos, ag.option.maxSpeed);
+                RcVec3f vel = CalcVel(ag.npos, pos, ag.option.maxSpeed);
                 crowd.RequestMoveVelocity(ag, vel);
             }
         }
@@ -149,11 +148,11 @@ public class AbstractCrowdTest
         }
     }
 
-    protected Vector3 CalcVel(Vector3 pos, Vector3 tgt, float speed)
+    protected RcVec3f CalcVel(RcVec3f pos, RcVec3f tgt, float speed)
     {
-        Vector3 vel = Vector3.Subtract(tgt, pos);
+        RcVec3f vel = RcVec3f.Subtract(tgt, pos);
         vel.Y = 0.0f;
-        vel = Vector3.Normalize(vel);
+        vel = RcVec3f.Normalize(vel);
         vel = vel.Scale(speed);
         return vel;
     }

test/DotRecast.Detour.Crowd.Test/Crowd1Test.cs

@@ -22,7 +22,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Crowd.Test;
 
-[Parallelizable]
+
 public class Crowd1Test : AbstractCrowdTest
 {
     static readonly float[][] EXPECTED_A1Q0TVTA =

test/DotRecast.Detour.Crowd.Test/Crowd4Test.cs

@@ -24,7 +24,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Crowd.Test;
 
-[Parallelizable]
+
 public class Crowd4Test : AbstractCrowdTest
 {
     static readonly float[][] EXPECTED_A1Q2TVTA =

test/DotRecast.Detour.Crowd.Test/Crowd4VelocityTest.cs

@@ -22,7 +22,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Crowd.Test;
 
-[Parallelizable]
+
 public class Crowd4VelocityTest : AbstractCrowdTest
 {
     static readonly float[][] EXPECTED_A1Q3TVTA =

test/DotRecast.Detour.Crowd.Test/DotRecast.Detour.Crowd.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Detour.Crowd.Test/PathCorridorTest.cs

@@ -19,14 +19,13 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 using Moq;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Crowd.Test;
 
-[Parallelizable]
+
 public class PathCorridorTest
 {
     private readonly DtPathCorridor corridor = new DtPathCorridor();
@@ -35,27 +34,28 @@ public class PathCorridorTest
     [SetUp]
     public void SetUp()
     {
-        corridor.Reset(0, new Vector3(10, 20, 30));
+        corridor.Init(256);
+        corridor.Reset(0, new RcVec3f(10, 20, 30));
     }
 
     [Test]
     public void ShouldKeepOriginalPathInFindCornersWhenNothingCanBePruned()
     {
         List<DtStraightPath> straightPath = new();
-        straightPath.Add(new DtStraightPath(new Vector3(11, 20, 30.00001f), 0, 0));
-        straightPath.Add(new DtStraightPath(new Vector3(12, 20, 30.00002f), 0, 0));
-        straightPath.Add(new DtStraightPath(new Vector3(11f, 21, 32f), 0, 0));
-        straightPath.Add(new DtStraightPath(new Vector3(11f, 21, 32f), 0, 0));
+        straightPath.Add(new DtStraightPath(new RcVec3f(11, 20, 30.00001f), 0, 0));
+        straightPath.Add(new DtStraightPath(new RcVec3f(12, 20, 30.00002f), 0, 0));
+        straightPath.Add(new DtStraightPath(new RcVec3f(11f, 21, 32f), 0, 0));
+        straightPath.Add(new DtStraightPath(new RcVec3f(11f, 21, 32f), 0, 0));
         var mockQuery = new Mock<DtNavMeshQuery>(It.IsAny<DtNavMesh>());
         mockQuery.Setup(q => q.FindStraightPath(
-                It.IsAny<Vector3>(),
-                It.IsAny<Vector3>(),
+                It.IsAny<RcVec3f>(),
+                It.IsAny<RcVec3f>(),
                 It.IsAny<List<long>>(),
                 ref It.Ref<List<DtStraightPath>>.IsAny,
                 It.IsAny<int>(),
                 It.IsAny<int>())
             )
-            .Callback((Vector3 startPos, Vector3 endPos, List<long> path,
+            .Callback((RcVec3f startPos, RcVec3f endPos, List<long> path,
                 ref List<DtStraightPath> refStraightPath, int maxStraightPath, int options) =>
             {
                 refStraightPath = straightPath;
@@ -72,21 +72,21 @@ public class PathCorridorTest
     public void ShouldPrunePathInFindCorners()
     {
         List<DtStraightPath> straightPath = new();
-        straightPath.Add(new DtStraightPath(new Vector3(10, 20, 30.00001f), 0, 0)); // too close
-        straightPath.Add(new DtStraightPath(new Vector3(10, 20, 30.00002f), 0, 0)); // too close
-        straightPath.Add(new DtStraightPath(new Vector3(11f, 21, 32f), 0, 0));
-        straightPath.Add(new DtStraightPath(new Vector3(12f, 22, 33f), DtStraightPathFlags.DT_STRAIGHTPATH_OFFMESH_CONNECTION, 0)); // offmesh
-        straightPath.Add(new DtStraightPath(new Vector3(11f, 21, 32f), DtStraightPathFlags.DT_STRAIGHTPATH_OFFMESH_CONNECTION, 0)); // offmesh
+        straightPath.Add(new DtStraightPath(new RcVec3f(10, 20, 30.00001f), 0, 0)); // too close
+        straightPath.Add(new DtStraightPath(new RcVec3f(10, 20, 30.00002f), 0, 0)); // too close
+        straightPath.Add(new DtStraightPath(new RcVec3f(11f, 21, 32f), 0, 0));
+        straightPath.Add(new DtStraightPath(new RcVec3f(12f, 22, 33f), DtStraightPathFlags.DT_STRAIGHTPATH_OFFMESH_CONNECTION, 0)); // offmesh
+        straightPath.Add(new DtStraightPath(new RcVec3f(11f, 21, 32f), DtStraightPathFlags.DT_STRAIGHTPATH_OFFMESH_CONNECTION, 0)); // offmesh
 
         var mockQuery = new Mock<DtNavMeshQuery>(It.IsAny<DtNavMesh>());
         mockQuery.Setup(q => q.FindStraightPath(
-                It.IsAny<Vector3>(),
-                It.IsAny<Vector3>(),
+                It.IsAny<RcVec3f>(),
+                It.IsAny<RcVec3f>(),
                 It.IsAny<List<long>>(),
                 ref It.Ref<List<DtStraightPath>>.IsAny,
                 It.IsAny<int>(),
                 It.IsAny<int>())
-            ).Callback((Vector3 startPos, Vector3 endPos, List<long> path,
+            ).Callback((RcVec3f startPos, RcVec3f endPos, List<long> path,
                 ref List<DtStraightPath> refStraightPath, int maxStraightPath, int options) =>
             {
                 refStraightPath = straightPath;

test/DotRecast.Detour.Crowd.Test/RecastTestMeshBuilder.cs

@@ -17,7 +17,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 using DotRecast.Recast.Geom;
 

test/DotRecast.Detour.Dynamic.Test/DotRecast.Detour.Dynamic.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Detour.Dynamic.Test/DynamicNavMeshTest.cs

@@ -3,7 +3,6 @@ using System.IO;
 using System.Threading.Tasks;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic.Colliders;
 using DotRecast.Detour.Dynamic.Io;
 using DotRecast.Detour.Dynamic.Test.Io;
@@ -11,13 +10,13 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Dynamic.Test;
 
-[Parallelizable]
+
 public class DynamicNavMeshTest
 {
-    private static readonly Vector3 START_POS = new Vector3(70.87453f, 0.0010070801f, 86.69021f);
-    private static readonly Vector3 END_POS = new Vector3(-50.22061f, 0.0010070801f, -70.761444f);
-    private static readonly Vector3 EXTENT = new Vector3(0.1f, 0.1f, 0.1f);
-    private static readonly Vector3 SPHERE_POS = new Vector3(45.381645f, 0.0010070801f, 52.68981f);
+    private static readonly RcVec3f START_POS = new RcVec3f(70.87453f, 0.0010070801f, 86.69021f);
+    private static readonly RcVec3f END_POS = new RcVec3f(-50.22061f, 0.0010070801f, -70.761444f);
+    private static readonly RcVec3f EXTENT = new RcVec3f(0.1f, 0.1f, 0.1f);
+    private static readonly RcVec3f SPHERE_POS = new RcVec3f(45.381645f, 0.0010070801f, 52.68981f);
 
 
     [Test]

test/DotRecast.Detour.Dynamic.Test/Io/VoxelFileReaderTest.cs

@@ -20,13 +20,12 @@ freely, subject to the following restrictions:
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic.Io;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Dynamic.Test.Io;
 
-[Parallelizable]
+
 public class VoxelFileReaderTest
 {
     [Test]
@@ -51,8 +50,8 @@ public class VoxelFileReaderTest
         Assert.That(f.tiles[0].cellHeight, Is.EqualTo(0.001f));
         Assert.That(f.tiles[0].width, Is.EqualTo(810));
         Assert.That(f.tiles[0].depth, Is.EqualTo(810));
-        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new Vector3(-101.25f, 0f, -101.25f)));
-        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new Vector3(101.25f, 5.0f, 101.25f)));
+        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new RcVec3f(-101.25f, 0f, -101.25f)));
+        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new RcVec3f(101.25f, 5.0f, 101.25f)));
     }
 
     [Test]
@@ -78,7 +77,7 @@ public class VoxelFileReaderTest
         Assert.That(f.tiles[0].cellHeight, Is.EqualTo(0.001f));
         Assert.That(f.tiles[0].width, Is.EqualTo(90));
         Assert.That(f.tiles[0].depth, Is.EqualTo(90));
-        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new Vector3(-101.25f, 0f, -101.25f)));
-        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new Vector3(-78.75f, 5.0f, -78.75f)));
+        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new RcVec3f(-101.25f, 0f, -101.25f)));
+        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new RcVec3f(-78.75f, 5.0f, -78.75f)));
     }
 }

test/DotRecast.Detour.Dynamic.Test/Io/VoxelFileReaderWriterTest.cs

@@ -20,13 +20,12 @@ freely, subject to the following restrictions:
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic.Io;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Dynamic.Test.Io;
 
-[Parallelizable]
+
 public class VoxelFileReaderWriterTest
 {
     [TestCase(false)]
@@ -53,8 +52,8 @@ public class VoxelFileReaderWriterTest
         Assert.That(f.tiles[0].width, Is.EqualTo(810));
         Assert.That(f.tiles[0].depth, Is.EqualTo(810));
         Assert.That(f.tiles[0].spanData.Length, Is.EqualTo(9021024));
-        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new Vector3(-101.25f, 0f, -101.25f)));
-        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new Vector3(101.25f, 5.0f, 101.25f)));
+        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new RcVec3f(-101.25f, 0f, -101.25f)));
+        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new RcVec3f(101.25f, 5.0f, 101.25f)));
     }
 
     [TestCase(false)]
@@ -84,8 +83,8 @@ public class VoxelFileReaderWriterTest
         Assert.That(f.tiles[0].spanData.Length, Is.EqualTo(104952));
         Assert.That(f.tiles[5].spanData.Length, Is.EqualTo(109080));
         Assert.That(f.tiles[18].spanData.Length, Is.EqualTo(113400));
-        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new Vector3(-101.25f, 0f, -101.25f)));
-        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new Vector3(-78.75f, 5.0f, -78.75f)));
+        Assert.That(f.tiles[0].boundsMin, Is.EqualTo(new RcVec3f(-101.25f, 0f, -101.25f)));
+        Assert.That(f.tiles[0].boundsMax, Is.EqualTo(new RcVec3f(-78.75f, 5.0f, -78.75f)));
     }
 
     private DtVoxelFile ReadWriteRead(BinaryReader bis, bool compression)

test/DotRecast.Detour.Dynamic.Test/VoxelQueryTest.cs

@@ -23,7 +23,6 @@ using System.Threading.Tasks;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Dynamic.Io;
 using DotRecast.Detour.Dynamic.Test.Io;
 using DotRecast.Recast;
@@ -32,12 +31,12 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Dynamic.Test;
 
-[Parallelizable]
+
 public class VoxelQueryTest
 {
     private const int TILE_WIDTH = 100;
     private const int TILE_DEPTH = 90;
-    private static readonly Vector3 ORIGIN = new Vector3(50, 10, 40);
+    private static readonly RcVec3f ORIGIN = new RcVec3f(50, 10, 40);
 
 
     [Test]
@@ -59,8 +58,8 @@ public class VoxelQueryTest
             });
 
         DtVoxelQuery query = new DtVoxelQuery(ORIGIN, TILE_WIDTH, TILE_DEPTH, hfProvider.Object);
-        Vector3 start = new Vector3(120, 10, 365);
-        Vector3 end = new Vector3(320, 10, 57);
+        RcVec3f start = new RcVec3f(120, 10, 365);
+        RcVec3f end = new RcVec3f(320, 10, 57);
 
         // When
         query.Raycast(start, end, out var hit);
@@ -75,8 +74,8 @@ public class VoxelQueryTest
     {
         DtDynamicNavMesh mesh = CreateDynaMesh();
         DtVoxelQuery query = mesh.VoxelQuery();
-        Vector3 start = new Vector3(7.4f, 0.5f, -64.8f);
-        Vector3 end = new Vector3(31.2f, 0.5f, -75.3f);
+        RcVec3f start = new RcVec3f(7.4f, 0.5f, -64.8f);
+        RcVec3f end = new RcVec3f(31.2f, 0.5f, -75.3f);
         bool isHit = query.Raycast(start, end, out var hit);
         Assert.That(isHit, Is.EqualTo(false));
     }
@@ -86,8 +85,8 @@ public class VoxelQueryTest
     {
         DtDynamicNavMesh mesh = CreateDynaMesh();
         DtVoxelQuery query = mesh.VoxelQuery();
-        Vector3 start = new Vector3(32.3f, 0.5f, 47.9f);
-        Vector3 end = new Vector3(-31.2f, 0.5f, -29.8f);
+        RcVec3f start = new RcVec3f(32.3f, 0.5f, 47.9f);
+        RcVec3f end = new RcVec3f(-31.2f, 0.5f, -29.8f);
         bool isHit = query.Raycast(start, end, out var hit);
         Assert.That(isHit, Is.EqualTo(true));
         Assert.That(hit, Is.EqualTo(0.5263836f).Within(1e-7f));

test/DotRecast.Detour.Extras.Test/DotRecast.Detour.Extras.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Detour.Extras.Test/Unity/Astar/UnityAStarPathfindingImporterTest.cs

@@ -20,22 +20,21 @@ using System.IO;
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Extras.Unity.Astar;
 using DotRecast.Detour.Io;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Extras.Test.Unity.Astar;
 
-[Parallelizable]
+
 public class UnityAStarPathfindingImporterTest
 {
     [Test]
     public void Test_v4_0_6()
     {
         DtNavMesh mesh = LoadNavMesh("graph.zip");
-        Vector3 startPos = new Vector3(8.200293f, 2.155071f, -26.176147f);
-        Vector3 endPos = new Vector3(11.971109f, 0.000000f, 8.663261f);
+        RcVec3f startPos = new RcVec3f(8.200293f, 2.155071f, -26.176147f);
+        RcVec3f endPos = new RcVec3f(11.971109f, 0.000000f, 8.663261f);
         var path = new List<long>();
         var status = FindPath(mesh, startPos, endPos, ref path);
         Assert.That(status, Is.EqualTo(DtStatus.DT_SUCCESS));
@@ -47,8 +46,8 @@ public class UnityAStarPathfindingImporterTest
     public void Test_v4_1_16()
     {
         DtNavMesh mesh = LoadNavMesh("graph_v4_1_16.zip");
-        Vector3 startPos = new Vector3(22.93f, -2.37f, -5.11f);
-        Vector3 endPos = new Vector3(16.81f, -2.37f, 25.52f);
+        RcVec3f startPos = new RcVec3f(22.93f, -2.37f, -5.11f);
+        RcVec3f endPos = new RcVec3f(16.81f, -2.37f, 25.52f);
         var path = new List<long>();
         var status = FindPath(mesh, startPos, endPos, ref path);
         Assert.That(status.Succeeded(), Is.True);
@@ -60,7 +59,7 @@ public class UnityAStarPathfindingImporterTest
     public void TestBoundsTree()
     {
         DtNavMesh mesh = LoadNavMesh("test_boundstree.zip");
-        Vector3 position = new Vector3(387.52988f, 19.997f, 368.86282f);
+        RcVec3f position = new RcVec3f(387.52988f, 19.997f, 368.86282f);
 
         mesh.CalcTileLoc(position, out var tileX, out var tileY);
         long tileRef = mesh.GetTileRefAt(tileX, tileY, 0);
@@ -91,7 +90,7 @@ public class UnityAStarPathfindingImporterTest
         return meshes[0];
     }
 
-    private DtStatus FindPath(DtNavMesh mesh, Vector3 startPos, Vector3 endPos, ref List<long> path)
+    private DtStatus FindPath(DtNavMesh mesh, RcVec3f startPos, RcVec3f endPos, ref List<long> path)
     {
         // Perform a simple pathfinding
         DtNavMeshQuery query = new DtNavMeshQuery(mesh);
@@ -101,19 +100,19 @@ public class UnityAStarPathfindingImporterTest
         return query.FindPath(polys[0].refs, polys[1].refs, startPos, endPos, filter, ref path, DtFindPathOption.NoOption);
     }
 
-    private DtPolyPoint[] GetNearestPolys(DtNavMesh mesh, params Vector3[] positions)
+    private DtPolyPoint[] GetNearestPolys(DtNavMesh mesh, params RcVec3f[] positions)
     {
         DtNavMeshQuery query = new DtNavMeshQuery(mesh);
         IDtQueryFilter filter = new DtQueryDefaultFilter();
-        Vector3 extents = new Vector3(0.1f, 0.1f, 0.1f);
+        RcVec3f extents = new RcVec3f(0.1f, 0.1f, 0.1f);
 
         var results = new DtPolyPoint[positions.Length];
         for (int i = 0; i < results.Length; i++)
         {
-            Vector3 position = positions[i];
+            RcVec3f position = positions[i];
             var status = query.FindNearestPoly(position, extents, filter, out var nearestRef, out var nearestPt, out var _);
             Assert.That(status.Succeeded(), Is.True);
-            Assert.That(nearestPt, Is.Not.EqualTo(Vector3.Zero), "Nearest start position is null!");
+            Assert.That(nearestPt, Is.Not.EqualTo(RcVec3f.Zero), "Nearest start position is null!");
 
             results[i] = new DtPolyPoint(nearestRef, nearestPt);
         }

test/DotRecast.Detour.Test/AbstractDetourTest.cs

@@ -17,12 +17,11 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public abstract class AbstractDetourTest
 {
     protected static readonly long[] startRefs =
@@ -35,22 +34,22 @@ public abstract class AbstractDetourTest
         281474976710721L, 281474976710767L, 281474976710758L, 281474976710731L, 281474976710772L
     };
 
-    protected static readonly Vector3[] startPoss =
+    protected static readonly RcVec3f[] startPoss =
     {
-        new Vector3(22.60652f, 10.197294f, -45.918674f),
-        new Vector3(22.331268f, 10.197294f, -1.0401875f),
-        new Vector3(18.694363f, 15.803535f, -73.090416f),
-        new Vector3(0.7453353f, 10.197294f, -5.94005f),
-        new Vector3(-20.651257f, 5.904126f, -13.712508f)
+        new RcVec3f(22.60652f, 10.197294f, -45.918674f),
+        new RcVec3f(22.331268f, 10.197294f, -1.0401875f),
+        new RcVec3f(18.694363f, 15.803535f, -73.090416f),
+        new RcVec3f(0.7453353f, 10.197294f, -5.94005f),
+        new RcVec3f(-20.651257f, 5.904126f, -13.712508f)
     };
 
-    protected static readonly Vector3[] endPoss =
+    protected static readonly RcVec3f[] endPoss =
     {
-        new Vector3(6.4576626f, 10.197294f, -18.33406f),
-        new Vector3(-5.8023443f, 0.19729415f, 3.008419f),
-        new Vector3(38.423977f, 10.197294f, -0.116066754f),
-        new Vector3(0.8635526f, 10.197294f, -10.31032f),
-        new Vector3(18.784092f, 10.197294f, 3.0543678f),
+        new RcVec3f(6.4576626f, 10.197294f, -18.33406f),
+        new RcVec3f(-5.8023443f, 0.19729415f, 3.008419f),
+        new RcVec3f(38.423977f, 10.197294f, -0.116066754f),
+        new RcVec3f(0.8635526f, 10.197294f, -10.31032f),
+        new RcVec3f(18.784092f, 10.197294f, 3.0543678f),
     };
 
     protected DtNavMeshQuery query;

test/DotRecast.Detour.Test/ConvexConvexIntersectionTest.cs

@@ -21,7 +21,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class ConvexConvexIntersectionTest
 {
     [Test]

test/DotRecast.Detour.Test/DotRecast.Detour.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Detour.Test/DtNodePoolTest.cs

@@ -0,0 +1,84 @@
+using System.Collections.Immutable;
+using System.Linq;
+using NUnit.Framework;
+
+namespace DotRecast.Detour.Test;
+
+public class DtNodePoolTest
+{
+    [Test]
+    public void TestGetNode()
+    {
+        var pool = new DtNodePool();
+
+        var node1St = pool.GetNode(0);
+        var node2St = pool.GetNode(0);
+        Assert.That(node1St, Is.SameAs(node2St));
+
+        node1St.state = 1;
+        var node3St = pool.GetNode(0);
+        Assert.That(node1St, Is.Not.SameAs(node3St));
+    }
+
+    [Test]
+    public void TestFindNode()
+    {
+        var pool = new DtNodePool();
+
+        var counts = ImmutableArray.Create(2, 3, 5);
+
+        // get and create
+        for (int i = 0; i < counts.Length; ++i)
+        {
+            var count = counts[i];
+            for (int ii = 0; ii < count; ++ii)
+            {
+                var node = pool.GetNode(i);
+                node.state = ii + 1;
+            }
+        }
+
+        int sum = counts.Sum();
+        Assert.That(sum, Is.EqualTo(10));
+
+        // check GetNodeIdx GetNodeAtIdx
+        for (int i = 0; i < sum; ++i)
+        {
+            var node = pool.GetNodeAtIdx(i);
+            var nodeIdx = pool.GetNodeIdx(node);
+            var nodeByIdx = pool.GetNodeAtIdx(nodeIdx);
+
+            Assert.That(node, Is.SameAs(nodeByIdx));
+            Assert.That(nodeIdx, Is.EqualTo(i));
+        }
+
+        // check count
+        for (int i = 0; i < counts.Length; ++i)
+        {
+            var count = counts[i];
+            var n = pool.FindNodes(i, out var nodes);
+            Assert.That(n, Is.EqualTo(count));
+            Assert.That(nodes, Has.Count.EqualTo(count));
+
+            var node = pool.FindNode(i);
+            Assert.That(nodes[0], Is.SameAs(node));
+
+            var node2 = pool.FindNode(i);
+            Assert.That(nodes[0], Is.SameAs(node2));
+        }
+
+        // check other count
+        {
+            var n = pool.FindNodes(4, out var nodes);
+            Assert.That(n, Is.EqualTo(0));
+            Assert.That(nodes, Is.Null);
+        }
+
+        var totalCount = pool.GetNodeCount();
+        Assert.That(totalCount, Is.EqualTo(sum));
+
+        pool.Clear();
+        totalCount = pool.GetNodeCount();
+        Assert.That(totalCount, Is.EqualTo(0));
+    }
+}

test/DotRecast.Detour.Test/DtNodeQueueTest.cs

@@ -0,0 +1,112 @@
+using System.Collections.Generic;
+using DotRecast.Core;
+using DotRecast.Core.Collections;
+using NUnit.Framework;
+
+namespace DotRecast.Detour.Test;
+
+public class DtNodeQueueTest
+{
+    private static List<DtNode> ShuffledNodes(int count)
+    {
+        var nodes = new List<DtNode>();
+        for (int i = 0; i < count; ++i)
+        {
+            var node = new DtNode(i);
+            node.total = i;
+            nodes.Add(node);
+        }
+
+        nodes.Shuffle();
+        return nodes;
+    }
+
+    [Test]
+    public void TestPushAndPop()
+    {
+        var queue = new DtNodeQueue();
+
+        // check count
+        Assert.That(queue.Count(), Is.EqualTo(0));
+        
+        // null push
+        queue.Push(null);
+        Assert.That(queue.Count(), Is.EqualTo(0));
+
+        // test push
+        const int count = 1000;
+        var expectedNodes = ShuffledNodes(count);
+        foreach (var node in expectedNodes)
+        {
+            queue.Push(node);
+        }
+
+        Assert.That(queue.Count(), Is.EqualTo(count));
+
+        // test pop
+        expectedNodes.Sort(DtNode.ComparisonNodeTotal);
+        foreach (var node in expectedNodes)
+        {
+            Assert.That(queue.Peek(), Is.SameAs(node));
+            Assert.That(queue.Pop(), Is.SameAs(node));
+        }
+
+        Assert.That(queue.Count(), Is.EqualTo(0));
+    }
+
+    [Test]
+    public void TestClear()
+    {
+        var queue = new DtNodeQueue();
+
+        const int count = 555;
+        var expectedNodes = ShuffledNodes(count);
+        foreach (var node in expectedNodes)
+        {
+            queue.Push(node);
+        }
+
+        Assert.That(queue.Count(), Is.EqualTo(count));
+
+        queue.Clear();
+        Assert.That(queue.Count(), Is.EqualTo(0));
+        Assert.That(queue.IsEmpty(), Is.True);
+    }
+    
+    [Test]
+    public void TestModify()
+    {
+        var queue = new DtNodeQueue();
+
+        const int count = 5000;
+        var expectedNodes = ShuffledNodes(count);
+        
+        foreach (var node in expectedNodes)
+        {
+            queue.Push(node);
+        }
+
+        // check modify
+        queue.Modify(null);
+
+        // change total
+        var r = new RcRand();
+        foreach (var node in expectedNodes)
+        {
+            node.total = r.NextInt32() % (count / 50); // duplication for test
+        }
+
+        // test modify
+        foreach (var node in expectedNodes)
+        {
+            queue.Modify(node);
+        }
+        
+        // check
+        expectedNodes.Sort(DtNode.ComparisonNodeTotal);
+        foreach (var node in expectedNodes)
+        {
+            Assert.That(queue.Pop(), Is.SameAs(node));
+        }
+    } 
+}

test/DotRecast.Detour.Test/FindDistanceToWallTest.cs

@@ -17,33 +17,32 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class FindDistanceToWallTest : AbstractDetourTest
 {
     private static readonly float[] DISTANCES_TO_WALL = { 0.597511f, 3.201085f, 0.603713f, 2.791475f, 2.815544f };
 
-    private static readonly Vector3[] HIT_POSITION =
+    private static readonly RcVec3f[] HIT_POSITION =
     {
-        new Vector3(23.177608f, 10.197294f, -45.742954f),
-        new Vector3(22.331268f, 10.197294f, -4.241272f),
-        new Vector3(18.108675f, 15.743596f, -73.236839f),
-        new Vector3(1.984785f, 10.197294f, -8.441269f),
-        new Vector3(-22.315216f, 4.997294f, -11.441269f),
+        new RcVec3f(23.177608f, 10.197294f, -45.742954f),
+        new RcVec3f(22.331268f, 10.197294f, -4.241272f),
+        new RcVec3f(18.108675f, 15.743596f, -73.236839f),
+        new RcVec3f(1.984785f, 10.197294f, -8.441269f),
+        new RcVec3f(-22.315216f, 4.997294f, -11.441269f),
     };
 
-    private static readonly Vector3[] HIT_NORMAL =
+    private static readonly RcVec3f[] HIT_NORMAL =
     {
-        new Vector3(-0.955779f, 0.0f, -0.29408592f),
-        new Vector3(0.0f, 0.0f, 1.0f),
-        new Vector3(0.97014254f, 0.0f, 0.24253564f),
-        new Vector3(-1.0f, 0.0f, 0.0f),
-        new Vector3(1.0f, 0.0f, 0.0f),
+        new RcVec3f(-0.955779f, 0.0f, -0.29408592f),
+        new RcVec3f(0.0f, 0.0f, 1.0f),
+        new RcVec3f(0.97014254f, 0.0f, 0.24253564f),
+        new RcVec3f(-1.0f, 0.0f, 0.0f),
+        new RcVec3f(1.0f, 0.0f, 0.0f),
     };
 
     [Test]
@@ -52,7 +51,7 @@ public class FindDistanceToWallTest : AbstractDetourTest
         IDtQueryFilter filter = new DtQueryDefaultFilter();
         for (int i = 0; i < startRefs.Length; i++)
         {
-            Vector3 startPos = startPoss[i];
+            RcVec3f startPos = startPoss[i];
             query.FindDistanceToWall(startRefs[i], startPos, 3.5f, filter,
                 out var hitDist, out var hitPos, out var hitNormal);
             Assert.That(hitDist, Is.EqualTo(DISTANCES_TO_WALL[i]).Within(0.001f));

test/DotRecast.Detour.Test/FindLocalNeighbourhoodTest.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class FindLocalNeighbourhoodTest : AbstractDetourTest
 {
     private static readonly long[][] REFS =
@@ -58,7 +57,7 @@ public class FindLocalNeighbourhoodTest : AbstractDetourTest
         IDtQueryFilter filter = new DtQueryDefaultFilter();
         for (int i = 0; i < startRefs.Length; i++)
         {
-            Vector3 startPos = startPoss[i];
+            RcVec3f startPos = startPoss[i];
             var refs = new List<long>();
             var parentRefs = new List<long>();
             var status = query.FindLocalNeighbourhood(startRefs[i], startPos, 3.5f, filter, ref refs, ref parentRefs);

test/DotRecast.Detour.Test/FindNearestPolyTest.cs

@@ -17,33 +17,32 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class FindNearestPolyTest : AbstractDetourTest
 {
     private static readonly long[] POLY_REFS = { 281474976710696L, 281474976710773L, 281474976710680L, 281474976710753L, 281474976710733L };
 
-    private static readonly Vector3[] POLY_POS =
+    private static readonly RcVec3f[] POLY_POS =
     {
-        new Vector3(22.606520f, 10.197294f, -45.918674f),
-        new Vector3(22.331268f, 10.197294f, -1.040187f),
-        new Vector3(18.694363f, 15.803535f, -73.090416f),
-        new Vector3(0.745335f, 10.197294f, -5.940050f),
-        new Vector3(-20.651257f, 5.904126f, -13.712508f)
+        new RcVec3f(22.606520f, 10.197294f, -45.918674f),
+        new RcVec3f(22.331268f, 10.197294f, -1.040187f),
+        new RcVec3f(18.694363f, 15.803535f, -73.090416f),
+        new RcVec3f(0.745335f, 10.197294f, -5.940050f),
+        new RcVec3f(-20.651257f, 5.904126f, -13.712508f)
     };
 
     [Test]
     public void TestFindNearestPoly()
     {
         IDtQueryFilter filter = new DtQueryDefaultFilter();
-        Vector3 extents = new Vector3(2, 4, 2);
+        RcVec3f extents = new RcVec3f(2, 4, 2);
         for (int i = 0; i < startRefs.Length; i++)
         {
-            Vector3 startPos = startPoss[i];
+            RcVec3f startPos = startPoss[i];
             var status = query.FindNearestPoly(startPos, extents, filter, out var nearestRef, out var nearestPt, out var _);
             Assert.That(status.Succeeded(), Is.True);
             Assert.That(nearestRef, Is.EqualTo(POLY_REFS[i]));
@@ -57,10 +56,10 @@ public class FindNearestPolyTest : AbstractDetourTest
     [Test]
     public void ShouldReturnStartPosWhenNoPolyIsValid()
     {
-        Vector3 extents = new Vector3(2, 4, 2);
+        RcVec3f extents = new RcVec3f(2, 4, 2);
         for (int i = 0; i < startRefs.Length; i++)
         {
-            Vector3 startPos = startPoss[i];
+            RcVec3f startPos = startPoss[i];
             var status = query.FindNearestPoly(startPos, extents, DtQueryEmptyFilter.Shared, out var nearestRef, out var nearestPt, out var _);
             Assert.That(status.Succeeded(), Is.True);
             Assert.That(nearestRef, Is.EqualTo(0L));

test/DotRecast.Detour.Test/FindPathTest.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class FindPathTest : AbstractDetourTest
 {
     private static readonly DtStatus[] STATUSES =
@@ -75,59 +74,59 @@ public class FindPathTest : AbstractDetourTest
     {
         new[]
         {
-            new DtStraightPath(new Vector3(22.606520f, 10.197294f, -45.918674f), 1, 281474976710696L),
-            new DtStraightPath(new Vector3(3.484785f, 10.197294f, -34.241272f), 0, 281474976710713L),
-            new DtStraightPath(new Vector3(1.984785f, 10.197294f, -31.241272f), 0, 281474976710712L),
-            new DtStraightPath(new Vector3(1.984785f, 10.197294f, -29.741272f), 0, 281474976710727L),
-            new DtStraightPath(new Vector3(2.584784f, 10.197294f, -27.941273f), 0, 281474976710730L),
-            new DtStraightPath(new Vector3(6.457663f, 10.197294f, -18.334061f), 2, 0L)
+            new DtStraightPath(new RcVec3f(22.606520f, 10.197294f, -45.918674f), 1, 281474976710696L),
+            new DtStraightPath(new RcVec3f(3.484785f, 10.197294f, -34.241272f), 0, 281474976710713L),
+            new DtStraightPath(new RcVec3f(1.984785f, 10.197294f, -31.241272f), 0, 281474976710712L),
+            new DtStraightPath(new RcVec3f(1.984785f, 10.197294f, -29.741272f), 0, 281474976710727L),
+            new DtStraightPath(new RcVec3f(2.584784f, 10.197294f, -27.941273f), 0, 281474976710730L),
+            new DtStraightPath(new RcVec3f(6.457663f, 10.197294f, -18.334061f), 2, 0L)
         },
 
         new[]
         {
-            new DtStraightPath(new Vector3(22.331268f, 10.197294f, -1.040187f), 1, 281474976710773L),
-            new DtStraightPath(new Vector3(9.784786f, 10.197294f, -2.141273f), 0, 281474976710755L),
-            new DtStraightPath(new Vector3(7.984783f, 10.197294f, -2.441269f), 0, 281474976710753L),
-            new DtStraightPath(new Vector3(1.984785f, 10.197294f, -8.441269f), 0, 281474976710752L),
-            new DtStraightPath(new Vector3(-4.315216f, 10.197294f, -15.341270f), 0, 281474976710724L),
-            new DtStraightPath(new Vector3(-8.215216f, 10.197294f, -17.441269f), 0, 281474976710728L),
-            new DtStraightPath(new Vector3(-10.015216f, 10.197294f, -17.741272f), 0, 281474976710738L),
-            new DtStraightPath(new Vector3(-11.815216f, 9.997294f, -17.441269f), 0, 281474976710736L),
-            new DtStraightPath(new Vector3(-17.815216f, 5.197294f, -11.441269f), 0, 281474976710735L),
-            new DtStraightPath(new Vector3(-17.815216f, 5.197294f, -8.441269f), 0, 281474976710746L),
-            new DtStraightPath(new Vector3(-11.815216f, 0.197294f, 3.008419f), 2, 0L)
+            new DtStraightPath(new RcVec3f(22.331268f, 10.197294f, -1.040187f), 1, 281474976710773L),
+            new DtStraightPath(new RcVec3f(9.784786f, 10.197294f, -2.141273f), 0, 281474976710755L),
+            new DtStraightPath(new RcVec3f(7.984783f, 10.197294f, -2.441269f), 0, 281474976710753L),
+            new DtStraightPath(new RcVec3f(1.984785f, 10.197294f, -8.441269f), 0, 281474976710752L),
+            new DtStraightPath(new RcVec3f(-4.315216f, 10.197294f, -15.341270f), 0, 281474976710724L),
+            new DtStraightPath(new RcVec3f(-8.215216f, 10.197294f, -17.441269f), 0, 281474976710728L),
+            new DtStraightPath(new RcVec3f(-10.015216f, 10.197294f, -17.741272f), 0, 281474976710738L),
+            new DtStraightPath(new RcVec3f(-11.815216f, 9.997294f, -17.441269f), 0, 281474976710736L),
+            new DtStraightPath(new RcVec3f(-17.815216f, 5.197294f, -11.441269f), 0, 281474976710735L),
+            new DtStraightPath(new RcVec3f(-17.815216f, 5.197294f, -8.441269f), 0, 281474976710746L),
+            new DtStraightPath(new RcVec3f(-11.815216f, 0.197294f, 3.008419f), 2, 0L)
         },
 
         new[]
         {
-            new DtStraightPath(new Vector3(18.694363f, 15.803535f, -73.090416f), 1, 281474976710680L),
-            new DtStraightPath(new Vector3(17.584785f, 10.197294f, -49.841274f), 0, 281474976710697L),
-            new DtStraightPath(new Vector3(17.284786f, 10.197294f, -48.041275f), 0, 281474976710695L),
-            new DtStraightPath(new Vector3(16.084785f, 10.197294f, -45.341274f), 0, 281474976710694L),
-            new DtStraightPath(new Vector3(3.484785f, 10.197294f, -34.241272f), 0, 281474976710713L),
-            new DtStraightPath(new Vector3(1.984785f, 10.197294f, -31.241272f), 0, 281474976710712L),
-            new DtStraightPath(new Vector3(1.984785f, 10.197294f, -8.441269f), 0, 281474976710753L),
-            new DtStraightPath(new Vector3(7.984783f, 10.197294f, -2.441269f), 0, 281474976710755L),
-            new DtStraightPath(new Vector3(9.784786f, 10.197294f, -2.141273f), 0, 281474976710768L),
-            new DtStraightPath(new Vector3(38.423977f, 10.197294f, -0.116067f), 2, 0L)
+            new DtStraightPath(new RcVec3f(18.694363f, 15.803535f, -73.090416f), 1, 281474976710680L),
+            new DtStraightPath(new RcVec3f(17.584785f, 10.197294f, -49.841274f), 0, 281474976710697L),
+            new DtStraightPath(new RcVec3f(17.284786f, 10.197294f, -48.041275f), 0, 281474976710695L),
+            new DtStraightPath(new RcVec3f(16.084785f, 10.197294f, -45.341274f), 0, 281474976710694L),
+            new DtStraightPath(new RcVec3f(3.484785f, 10.197294f, -34.241272f), 0, 281474976710713L),
+            new DtStraightPath(new RcVec3f(1.984785f, 10.197294f, -31.241272f), 0, 281474976710712L),
+            new DtStraightPath(new RcVec3f(1.984785f, 10.197294f, -8.441269f), 0, 281474976710753L),
+            new DtStraightPath(new RcVec3f(7.984783f, 10.197294f, -2.441269f), 0, 281474976710755L),
+            new DtStraightPath(new RcVec3f(9.784786f, 10.197294f, -2.141273f), 0, 281474976710768L),
+            new DtStraightPath(new RcVec3f(38.423977f, 10.197294f, -0.116067f), 2, 0L)
         },
 
         new[]
         {
-            new DtStraightPath(new Vector3(0.745335f, 10.197294f, -5.940050f), 1, 281474976710753L),
-            new DtStraightPath(new Vector3(0.863553f, 10.197294f, -10.310320f), 2, 0L)
+            new DtStraightPath(new RcVec3f(0.745335f, 10.197294f, -5.940050f), 1, 281474976710753L),
+            new DtStraightPath(new RcVec3f(0.863553f, 10.197294f, -10.310320f), 2, 0L)
         },
 
         new[]
         {
-            new DtStraightPath(new Vector3(-20.651257f, 5.904126f, -13.712508f), 1, 281474976710733L),
-            new DtStraightPath(new Vector3(-11.815216f, 9.997294f, -17.441269f), 0, 281474976710738L),
-            new DtStraightPath(new Vector3(-10.015216f, 10.197294f, -17.741272f), 0, 281474976710728L),
-            new DtStraightPath(new Vector3(-8.215216f, 10.197294f, -17.441269f), 0, 281474976710724L),
-            new DtStraightPath(new Vector3(-4.315216f, 10.197294f, -15.341270f), 0, 281474976710729L),
-            new DtStraightPath(new Vector3(1.984785f, 10.197294f, -8.441269f), 0, 281474976710753L),
-            new DtStraightPath(new Vector3(7.984783f, 10.197294f, -2.441269f), 0, 281474976710755L),
-            new DtStraightPath(new Vector3(18.784092f, 10.197294f, 3.054368f), 2, 0L)
+            new DtStraightPath(new RcVec3f(-20.651257f, 5.904126f, -13.712508f), 1, 281474976710733L),
+            new DtStraightPath(new RcVec3f(-11.815216f, 9.997294f, -17.441269f), 0, 281474976710738L),
+            new DtStraightPath(new RcVec3f(-10.015216f, 10.197294f, -17.741272f), 0, 281474976710728L),
+            new DtStraightPath(new RcVec3f(-8.215216f, 10.197294f, -17.441269f), 0, 281474976710724L),
+            new DtStraightPath(new RcVec3f(-4.315216f, 10.197294f, -15.341270f), 0, 281474976710729L),
+            new DtStraightPath(new RcVec3f(1.984785f, 10.197294f, -8.441269f), 0, 281474976710753L),
+            new DtStraightPath(new RcVec3f(7.984783f, 10.197294f, -2.441269f), 0, 281474976710755L),
+            new DtStraightPath(new RcVec3f(18.784092f, 10.197294f, 3.054368f), 2, 0L)
         }
     };
 
@@ -140,8 +139,8 @@ public class FindPathTest : AbstractDetourTest
         {
             long startRef = startRefs[i];
             long endRef = endRefs[i];
-            Vector3 startPos = startPoss[i];
-            Vector3 endPos = endPoss[i];
+            RcVec3f startPos = startPoss[i];
+            RcVec3f endPos = endPoss[i];
             var status = query.FindPath(startRef, endRef, startPos, endPos, filter, ref path, DtFindPathOption.NoOption);
             Assert.That(status, Is.EqualTo(STATUSES[i]));
             Assert.That(path.Count, Is.EqualTo(RESULTS[i].Length));

test/DotRecast.Detour.Test/FindPolysAroundCircleTest.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class FindPolysAroundCircleTest : AbstractDetourTest
 {
     private static readonly long[][] REFS =
@@ -109,7 +108,7 @@ public class FindPolysAroundCircleTest : AbstractDetourTest
         for (int i = 0; i < startRefs.Length; i++)
         {
             long startRef = startRefs[i];
-            Vector3 startPos = startPoss[i];
+            RcVec3f startPos = startPoss[i];
             var status = query.FindPolysAroundCircle(startRef, startPos, 7.5f, filter, ref refs, ref parentRefs, ref costs);
             Assert.That(status.Succeeded(), Is.True);
 

test/DotRecast.Detour.Test/FindPolysAroundShapeTest.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class FindPolysAroundShapeTest : AbstractDetourTest
 {
     private static readonly long[][] REFS =
@@ -137,7 +136,7 @@ public class FindPolysAroundShapeTest : AbstractDetourTest
         for (int i = 0; i < startRefs.Length; i++)
         {
             long startRef = startRefs[i];
-            Vector3 startPos = startPoss[i];
+            RcVec3f startPos = startPoss[i];
             query.FindPolysAroundShape(startRef, GetQueryPoly(startPos, endPoss[i]), filter, ref refs, ref parentRefs, ref costs);
 
             Assert.That(refs.Count, Is.EqualTo(REFS[i].Length));
@@ -159,13 +158,13 @@ public class FindPolysAroundShapeTest : AbstractDetourTest
         }
     }
 
-    private Vector3[] GetQueryPoly(Vector3 m_spos, Vector3 m_epos)
+    private RcVec3f[] GetQueryPoly(RcVec3f m_spos, RcVec3f m_epos)
     {
         float nx = (m_epos.Z - m_spos.Z) * 0.25f;
         float nz = -(m_epos.X - m_spos.X) * 0.25f;
         float agentHeight = 2.0f;
 
-        Vector3[] m_queryPoly = new Vector3[4];
+        RcVec3f[] m_queryPoly = new RcVec3f[4];
         m_queryPoly[0].X = m_spos.X + nx * 1.2f;
         m_queryPoly[0].Y = m_spos.Y + agentHeight / 2;
         m_queryPoly[0].Z = m_spos.Z + nz * 1.2f;

test/DotRecast.Detour.Test/GetPolyWallSegmentsTest.cs

@@ -22,7 +22,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class GetPolyWallSegmentsTest : AbstractDetourTest
 {
     private static readonly RcSegmentVert[][] VERTICES =

test/DotRecast.Detour.Test/Io/MeshDataReaderWriterTest.cs

@@ -23,7 +23,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Test.Io;
 
-[Parallelizable]
+
 public class MeshDataReaderWriterTest
 {
     private const int VERTS_PER_POLYGON = 6;

test/DotRecast.Detour.Test/Io/MeshSetReaderTest.cs

@@ -24,7 +24,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Test.Io;
 
-[Parallelizable]
+
 public class MeshSetReaderTest
 {
     private readonly DtMeshSetReader reader = new DtMeshSetReader();

test/DotRecast.Detour.Test/Io/MeshSetReaderWriterTest.cs

@@ -20,7 +20,6 @@ using System.Collections.Generic;
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.Io;
 using DotRecast.Recast;
 using DotRecast.Recast.Geom;
@@ -29,7 +28,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Test.Io;
 
-[Parallelizable]
+
 public class MeshSetReaderWriterTest
 {
     private readonly DtMeshSetWriter writer = new DtMeshSetWriter();
@@ -69,8 +68,8 @@ public class MeshSetReaderWriterTest
         header.numTiles = 0;
         DtNavMesh mesh = new DtNavMesh(header.option, 6);
 
-        Vector3 bmin = geom.GetMeshBoundsMin();
-        Vector3 bmax = geom.GetMeshBoundsMax();
+        RcVec3f bmin = geom.GetMeshBoundsMin();
+        RcVec3f bmax = geom.GetMeshBoundsMax();
         RcCommons.CalcTileCount(bmin, bmax, m_cellSize, m_tileSize, m_tileSize, out var tw, out var th);
         for (int y = 0; y < th; ++y)
         {

test/DotRecast.Detour.Test/MoveAlongSurfaceTest.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class MoveAlongSurfaceTest : AbstractDetourTest
 {
     private static readonly long[][] VISITED =
@@ -57,13 +56,13 @@ public class MoveAlongSurfaceTest : AbstractDetourTest
         }
     };
 
-    private static readonly Vector3[] POSITION =
+    private static readonly RcVec3f[] POSITION =
     {
-        new Vector3(6.457663f, 10.197294f, -18.334061f),
-        new Vector3(-1.433933f, 10.197294f, -1.359993f),
-        new Vector3(12.184784f, 9.997294f, -18.941269f),
-        new Vector3(0.863553f, 10.197294f, -10.310320f),
-        new Vector3(18.784092f, 10.197294f, 3.054368f),
+        new RcVec3f(6.457663f, 10.197294f, -18.334061f),
+        new RcVec3f(-1.433933f, 10.197294f, -1.359993f),
+        new RcVec3f(12.184784f, 9.997294f, -18.941269f),
+        new RcVec3f(0.863553f, 10.197294f, -10.310320f),
+        new RcVec3f(18.784092f, 10.197294f, 3.054368f),
     };
 
     [Test]
@@ -74,8 +73,8 @@ public class MoveAlongSurfaceTest : AbstractDetourTest
         for (int i = 0; i < startRefs.Length; i++)
         {
             long startRef = startRefs[i];
-            Vector3 startPos = startPoss[i];
-            Vector3 endPos = endPoss[i];
+            RcVec3f startPos = startPoss[i];
+            RcVec3f endPos = endPoss[i];
             var status = query.MoveAlongSurface(startRef, startPos, endPos, filter, out var result, ref visited);
             Assert.That(status.Succeeded(), Is.True);
 

test/DotRecast.Detour.Test/NavMeshBuilderTest.cs

@@ -21,7 +21,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class NavMeshBuilderTest
 {
     private DtMeshData nmd;

test/DotRecast.Detour.Test/PolygonByCircleConstraintTest.cs

@@ -18,12 +18,11 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class PolygonByCircleConstraintTest
 {
     private readonly IDtPolygonByCircleConstraint _constraint = DtStrictDtPolygonByCircleConstraint.Shared;
@@ -32,7 +31,7 @@ public class PolygonByCircleConstraintTest
     public void ShouldHandlePolygonFullyInsideCircle()
     {
         float[] polygon = { -2, 0, 2, 2, 0, 2, 2, 0, -2, -2, 0, -2 };
-        Vector3 center = new Vector3(1, 0, 1);
+        RcVec3f center = new RcVec3f(1, 0, 1);
         float[] constrained = _constraint.Apply(polygon, center, 6);
 
         Assert.That(constrained, Is.EqualTo(polygon));
@@ -43,7 +42,7 @@ public class PolygonByCircleConstraintTest
     {
         int expectedSize = 21;
         float[] polygon = { -2, 0, 2, 2, 0, 2, 2, 0, -2, -2, 0, -2 };
-        Vector3 center = new Vector3(2, 0, 0);
+        RcVec3f center = new RcVec3f(2, 0, 0);
 
         float[] constrained = _constraint.Apply(polygon, center, 3);
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
@@ -55,7 +54,7 @@ public class PolygonByCircleConstraintTest
     {
         int expectedSize = 12 * 3;
         float[] polygon = { -4, 0, 0, -3, 0, 3, 2, 0, 3, 3, 0, -3, -2, 0, -4 };
-        Vector3 center = new Vector3(-1, 0, -1);
+        RcVec3f center = new RcVec3f(-1, 0, -1);
         float[] constrained = _constraint.Apply(polygon, center, 2);
 
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
@@ -73,7 +72,7 @@ public class PolygonByCircleConstraintTest
     {
         int expectedSize = 9 * 3;
         float[] polygon = { -4, 0, 0, -3, 0, 3, 2, 0, 3, 3, 0, -3, -2, 0, -4 };
-        Vector3 center = new Vector3(-2, 0, -1);
+        RcVec3f center = new RcVec3f(-2, 0, -1);
         float[] constrained = _constraint.Apply(polygon, center, 3);
 
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
@@ -85,7 +84,7 @@ public class PolygonByCircleConstraintTest
     {
         int expectedSize = 7 * 3;
         float[] polygon = { -4, 0, 0, -3, 0, 3, 2, 0, 3, 3, 0, -3, -2, 0, -4 };
-        Vector3 center = new Vector3(4, 0, 0);
+        RcVec3f center = new RcVec3f(4, 0, 0);
         float[] constrained = _constraint.Apply(polygon, center, 4);
 
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));

test/DotRecast.Detour.Test/RandomPointTest.cs

@@ -19,14 +19,13 @@ freely, subject to the following restrictions:
 using System;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 using NUnit.Framework;
 
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class RandomPointTest : AbstractDetourTest
 {
     [Test]

test/DotRecast.Detour.Test/RecastTestMeshBuilder.cs

@@ -17,7 +17,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 using DotRecast.Recast.Geom;
 

test/DotRecast.Detour.Test/TestTiledNavMeshBuilder.cs

@@ -18,7 +18,6 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast;
 using DotRecast.Recast.Geom;
 

test/DotRecast.Detour.Test/TiledFindPathTest.cs

@@ -18,13 +18,12 @@ freely, subject to the following restrictions:
 
 using System.Collections.Generic;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 
 using NUnit.Framework;
 
 namespace DotRecast.Detour.Test;
 
-[Parallelizable]
+
 public class TiledFindPathTest
 {
     private static readonly DtStatus[] STATUSES = { DtStatus.DT_SUCCESS };
@@ -44,8 +43,8 @@ public class TiledFindPathTest
 
     protected static readonly long[] START_REFS = { 281475015507969L };
     protected static readonly long[] END_REFS = { 281474985099266L };
-    protected static readonly Vector3[] START_POS = { new Vector3(39.447338f, 9.998177f, -0.784811f) };
-    protected static readonly Vector3[] END_POS = { new Vector3(19.292645f, 11.611748f, -57.750366f) };
+    protected static readonly RcVec3f[] START_POS = { new RcVec3f(39.447338f, 9.998177f, -0.784811f) };
+    protected static readonly RcVec3f[] END_POS = { new RcVec3f(19.292645f, 11.611748f, -57.750366f) };
 
     protected DtNavMeshQuery query;
     protected DtNavMesh navmesh;
@@ -71,8 +70,8 @@ public class TiledFindPathTest
         {
             long startRef = START_REFS[i];
             long endRef = END_REFS[i];
-            Vector3 startPos = START_POS[i];
-            Vector3 endPos = END_POS[i];
+            RcVec3f startPos = START_POS[i];
+            RcVec3f endPos = END_POS[i];
             var status = query.FindPath(startRef, endRef, startPos, endPos, filter, ref path, DtFindPathOption.NoOption);
             Assert.That(status, Is.EqualTo(STATUSES[i]));
             Assert.That(path.Count, Is.EqualTo(RESULTS[i].Length));

test/DotRecast.Detour.TileCache.Test/AbstractTileCacheTest.cs

@@ -27,7 +27,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test;
 
-[Parallelizable]
+
 public class AbstractTileCacheTest
 {
     private const int EXPECTED_LAYERS_PER_TILE = 4;

test/DotRecast.Detour.TileCache.Test/DotRecast.Detour.TileCache.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Detour.TileCache.Test/Io/TileCacheReaderTest.cs

@@ -27,7 +27,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test.Io;
 
-[Parallelizable]
+
 public class TileCacheReaderTest
 {
     private readonly DtTileCacheReader reader = new DtTileCacheReader(DtTileCacheCompressorFactory.Shared);

test/DotRecast.Detour.TileCache.Test/Io/TileCacheReaderWriterTest.cs

@@ -28,7 +28,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test.Io;
 
-[Parallelizable]
+
 public class TileCacheReaderWriterTest : AbstractTileCacheTest
 {
     private readonly DtTileCacheReader reader = new DtTileCacheReader(DtTileCacheCompressorFactory.Shared);

test/DotRecast.Detour.TileCache.Test/TempObstaclesTest.cs

@@ -21,13 +21,12 @@ freely, subject to the following restrictions:
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test;
 
-[Parallelizable]
+
 public class TempObstaclesTest : AbstractTileCacheTest
 {
     [Test]
@@ -48,7 +47,7 @@ public class TempObstaclesTest : AbstractTileCacheTest
         DtMeshTile tile = tiles[0];
         Assert.That(tile.data.header.vertCount, Is.EqualTo(16));
         Assert.That(tile.data.header.polyCount, Is.EqualTo(6));
-        long o = tc.AddObstacle(new Vector3(-1.815208f, 9.998184f, -20.307983f), 1f, 2f);
+        long o = tc.AddObstacle(new RcVec3f(-1.815208f, 9.998184f, -20.307983f), 1f, 2f);
         bool upToDate = tc.Update();
         Assert.That(upToDate, Is.True);
         tiles = tc.GetNavMesh().GetTilesAt(1, 4);
@@ -83,8 +82,8 @@ public class TempObstaclesTest : AbstractTileCacheTest
         Assert.That(tile.data.header.vertCount, Is.EqualTo(16));
         Assert.That(tile.data.header.polyCount, Is.EqualTo(6));
         long o = tc.AddBoxObstacle(
-            new Vector3(-2.315208f, 9.998184f, -20.807983f),
-            new Vector3(-1.315208f, 11.998184f, -19.807983f)
+            new RcVec3f(-2.315208f, 9.998184f, -20.807983f),
+            new RcVec3f(-1.315208f, 11.998184f, -19.807983f)
         );
         bool upToDate = tc.Update();
         Assert.That(upToDate, Is.True);

test/DotRecast.Detour.TileCache.Test/TestTileLayerBuilder.cs

@@ -22,7 +22,6 @@ using System.Collections.Generic;
 using System.Linq;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.TileCache.Io.Compress;
 using DotRecast.Recast;
 using DotRecast.Recast.Geom;
@@ -72,8 +71,8 @@ public class TestTileLayerBuilder : DtTileCacheLayerBuilder
             true, true, true,
             SampleAreaModifications.SAMPLE_AREAMOD_GROUND, true);
 
-        Vector3 bmin = geom.GetMeshBoundsMin();
-        Vector3 bmax = geom.GetMeshBoundsMax();
+        RcVec3f bmin = geom.GetMeshBoundsMin();
+        RcVec3f bmax = geom.GetMeshBoundsMax();
         RcCommons.CalcTileCount(bmin, bmax, CellSize, m_tileSize, m_tileSize, out tw, out th);
     }
 

test/DotRecast.Detour.TileCache.Test/TileCacheFindPathTest.cs

@@ -22,7 +22,6 @@ using System.Collections.Generic;
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Detour.TileCache.Io;
 using DotRecast.Detour.TileCache.Io.Compress;
 using DotRecast.Detour.TileCache.Test.Io;
@@ -30,11 +29,11 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test;
 
-[Parallelizable]
+
 public class TileCacheFindPathTest : AbstractTileCacheTest
 {
-    private readonly Vector3 start = new Vector3(39.44734f, 9.998177f, -0.784811f);
-    private readonly Vector3 end = new Vector3(19.292645f, 11.611748f, -57.750366f);
+    private readonly RcVec3f start = new RcVec3f(39.44734f, 9.998177f, -0.784811f);
+    private readonly RcVec3f end = new RcVec3f(19.292645f, 11.611748f, -57.750366f);
     private readonly DtNavMesh navmesh;
     private readonly DtNavMeshQuery query;
 
@@ -51,7 +50,7 @@ public class TileCacheFindPathTest : AbstractTileCacheTest
     public void TestFindPath()
     {
         IDtQueryFilter filter = new DtQueryDefaultFilter();
-        Vector3 extents = new Vector3(2f, 4f, 2f);
+        RcVec3f extents = new RcVec3f(2f, 4f, 2f);
         query.FindNearestPoly(start, extents, filter, out var startRef, out var startPos, out var _);
         query.FindNearestPoly(end, extents, filter, out var endRef, out var endPos, out var _);
 

test/DotRecast.Detour.TileCache.Test/TileCacheNavigationTest.cs

@@ -21,19 +21,18 @@ freely, subject to the following restrictions:
 using System.Collections.Generic;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test;
 
-[Parallelizable]
+
 public class TileCacheNavigationTest : AbstractTileCacheTest
 {
     protected readonly long[] startRefs = { 281475006070787L };
     protected readonly long[] endRefs = { 281474986147841L };
-    protected readonly Vector3[] startPoss = { new Vector3(39.447338f, 9.998177f, -0.784811f) };
-    protected readonly Vector3[] endPoss = { new Vector3(19.292645f, 11.611748f, -57.750366f) };
+    protected readonly RcVec3f[] startPoss = { new RcVec3f(39.447338f, 9.998177f, -0.784811f) };
+    protected readonly RcVec3f[] endPoss = { new RcVec3f(19.292645f, 11.611748f, -57.750366f) };
     private readonly DtStatus[] statuses = { DtStatus.DT_SUCCESS };
 
     private readonly long[][] results =
@@ -89,8 +88,8 @@ public class TileCacheNavigationTest : AbstractTileCacheTest
         {
             long startRef = startRefs[i];
             long endRef = endRefs[i];
-            Vector3 startPos = startPoss[i];
-            Vector3 endPos = endPoss[i];
+            RcVec3f startPos = startPoss[i];
+            RcVec3f endPos = endPoss[i];
             var status = query.FindPath(startRef, endRef, startPos, endPos, filter, ref path, DtFindPathOption.NoOption);
             Assert.That(status, Is.EqualTo(statuses[i]));
             Assert.That(path.Count, Is.EqualTo(results[i].Length));
@@ -110,8 +109,8 @@ public class TileCacheNavigationTest : AbstractTileCacheTest
         {
             long startRef = startRefs[i];
             long endRef = endRefs[i];
-            Vector3 startPos = startPoss[i];
-            Vector3 endPos = endPoss[i];
+            RcVec3f startPos = startPoss[i];
+            RcVec3f endPos = endPoss[i];
             var status = query.FindPath(startRef, endRef, startPos, endPos, filter, ref path, DtFindPathOption.ZeroScale);
             Assert.That(status, Is.EqualTo(statuses[i]));
             Assert.That(path.Count, Is.EqualTo(results[i].Length));

test/DotRecast.Detour.TileCache.Test/TileCacheTest.cs

@@ -26,7 +26,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Detour.TileCache.Test;
 
-[Parallelizable]
+
 public class TileCacheTest : AbstractTileCacheTest
 {
     [Test]

test/DotRecast.Recast.Test/DotRecast.Recast.Test.csproj

@@ -7,15 +7,15 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="NUnit" Version="4.0.1" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
-        <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
+        <PackageReference Include="NUnit.Analyzers" Version="4.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="coverlet.collector" Version="6.0.0">
+        <PackageReference Include="coverlet.collector" Version="6.0.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

test/DotRecast.Recast.Test/RecastLayersTest.cs

@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 using System;
 using System.IO;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 using NUnit.Framework;
 
@@ -27,7 +26,7 @@ namespace DotRecast.Recast.Test;
 
 using static RcConstants;
 
-[Parallelizable]
+
 public class RecastLayersTest
 {
     private const float m_cellSize = 0.3f;

test/DotRecast.Recast.Test/RecastSoloMeshTest.cs

@@ -20,7 +20,6 @@ using System;
 using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
-using System.Numerics;
 using DotRecast.Recast.Geom;
 using NUnit.Framework;
 
@@ -29,7 +28,7 @@ namespace DotRecast.Recast.Test;
 using static RcConstants;
 using static RcAreas;
 
-[Parallelizable]
+
 public class RecastSoloMeshTest
 {
     private const float m_cellSize = 0.3f;
@@ -100,9 +99,9 @@ public class RecastSoloMeshTest
         m_partitionType = partitionType;
         IInputGeomProvider geomProvider = SimpleInputGeomProvider.LoadFile(filename);
         long time = RcFrequency.Ticks;
-        Vector3 bmin = geomProvider.GetMeshBoundsMin();
-        Vector3 bmax = geomProvider.GetMeshBoundsMax();
-        RcTelemetry m_ctx = new RcTelemetry();
+        RcVec3f bmin = geomProvider.GetMeshBoundsMin();
+        RcVec3f bmax = geomProvider.GetMeshBoundsMax();
+        RcContext m_ctx = new RcContext();
         //
         // Step 1. Initialize build config.
         //
@@ -141,7 +140,7 @@ public class RecastSoloMeshTest
             // If your input data is multiple meshes, you can transform them here, calculate
             // the are type for each of the meshes and rasterize them.
             int[] m_triareas = RcCommons.MarkWalkableTriangles(m_ctx, cfg.WalkableSlopeAngle, verts, tris, ntris, cfg.WalkableAreaMod);
-            RcRasterizations.RasterizeTriangles(m_solid, verts, tris, m_triareas, ntris, cfg.WalkableClimb, m_ctx);
+            RcRasterizations.RasterizeTriangles(m_ctx, verts, tris, m_triareas, ntris, m_solid, cfg.WalkableClimb);
         }
 
         //

test/DotRecast.Recast.Test/RecastTest.cs

@@ -23,7 +23,7 @@ namespace DotRecast.Recast.Test;
 
 using static RcConstants;
 
-[Parallelizable]
+
 public class RecastTest
 {
     [Test]
@@ -36,7 +36,7 @@ public class RecastTest
         int[] unwalkable_tri = { 0, 2, 1 };
         int nt = 1;
 
-        RcTelemetry ctx = new RcTelemetry();
+        RcContext ctx = new RcContext();
         {
             int[] areas = { 42 };
             RcCommons.ClearUnwalkableTriangles(ctx, walkableSlopeAngle, verts, nv, unwalkable_tri, nt, areas);

test/DotRecast.Recast.Test/RecastTileMeshTest.cs

@@ -27,7 +27,7 @@ using NUnit.Framework;
 
 namespace DotRecast.Recast.Test;
 
-[Parallelizable]
+
 public class RecastTileMeshTest
 {
     private const float m_cellSize = 0.3f;