forked from mirror/DotRecast
77 lines
3.5 KiB
C#
77 lines
3.5 KiB
C#
/*
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recast4j copyright (c) 2021 Piotr Piastucki piotr@jtilia.org
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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using System.Collections.Generic;
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using DotRecast.Core;
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using DotRecast.Recast.Geom;
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namespace DotRecast.Recast
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{
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public static class RecastVoxelization
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{
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public static RcHeightfield BuildSolidHeightfield(IInputGeomProvider geomProvider, RecastBuilderConfig builderCfg, RcTelemetry ctx)
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{
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RcConfig cfg = builderCfg.cfg;
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// Allocate voxel heightfield where we rasterize our input data to.
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RcHeightfield solid = new RcHeightfield(builderCfg.width, builderCfg.height, builderCfg.bmin, builderCfg.bmax, cfg.Cs, cfg.Ch, cfg.BorderSize);
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// Allocate array that can hold triangle area types.
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// If you have multiple meshes you need to process, allocate
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// and array which can hold the max number of triangles you need to
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// process.
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// Find triangles which are walkable based on their slope and rasterize
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// them.
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// If your input data is multiple meshes, you can transform them here,
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// calculate
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// the are type for each of the meshes and rasterize them.
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foreach (RcTriMesh geom in geomProvider.Meshes())
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{
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float[] verts = geom.GetVerts();
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if (cfg.UseTiles)
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{
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float[] tbmin = new float[2];
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float[] tbmax = new float[2];
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tbmin[0] = builderCfg.bmin.x;
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tbmin[1] = builderCfg.bmin.z;
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tbmax[0] = builderCfg.bmax.x;
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tbmax[1] = builderCfg.bmax.z;
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List<RcChunkyTriMeshNode> nodes = geom.GetChunksOverlappingRect(tbmin, tbmax);
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foreach (RcChunkyTriMeshNode node in nodes)
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{
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int[] tris = node.tris;
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int ntris = tris.Length / 3;
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int[] m_triareas = RcUtils.MarkWalkableTriangles(ctx, cfg.WalkableSlopeAngle, verts, tris, ntris, cfg.WalkableAreaMod);
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RecastRasterization.RasterizeTriangles(solid, verts, tris, m_triareas, ntris, cfg.WalkableClimb, ctx);
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}
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}
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else
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{
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int[] tris = geom.GetTris();
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int ntris = tris.Length / 3;
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int[] m_triareas = RcUtils.MarkWalkableTriangles(ctx, cfg.WalkableSlopeAngle, verts, tris, ntris, cfg.WalkableAreaMod);
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RecastRasterization.RasterizeTriangles(solid, verts, tris, m_triareas, ntris, cfg.WalkableClimb, ctx);
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}
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}
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return solid;
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}
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}
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}
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