forked from mirror/DotRecast
79 lines
3.2 KiB
C#
79 lines
3.2 KiB
C#
/*
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Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
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recast4j copyright (c) 2015-2019 Piotr Piastucki piotr@jtilia.org
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DotRecast Copyright (c) 2023 Choi Ikpil ikpil@naver.com
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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;
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namespace DotRecast.Recast
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{
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public static class RecastCommon
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{
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/// Gets neighbor connection data for the specified direction.
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/// @param[in] s The span to check.
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/// @param[in] dir The direction to check. [Limits: 0 <= value < 4]
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/// @return The neighbor connection data for the specified direction,
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/// or #RC_NOT_CONNECTED if there is no connection.
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public static int GetCon(CompactSpan s, int dir)
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{
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int shift = dir * 6;
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return (s.con >> shift) & 0x3f;
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}
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/// Gets the standard width (x-axis) offset for the specified direction.
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/// @param[in] dir The direction. [Limits: 0 <= value < 4]
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/// @return The width offset to apply to the current cell position to move
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/// in the direction.
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public static int GetDirOffsetX(int dir)
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{
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int[] offset = { -1, 0, 1, 0, };
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return offset[dir & 0x03];
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}
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/// Gets the standard height (z-axis) offset for the specified direction.
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/// @param[in] dir The direction. [Limits: 0 <= value < 4]
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/// @return The height offset to apply to the current cell position to move
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/// in the direction.
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public static int GetDirOffsetY(int dir)
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{
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int[] offset = { 0, 1, 0, -1 };
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return offset[dir & 0x03];
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}
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/// Gets the direction for the specified offset. One of x and y should be 0.
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/// @param[in] x The x offset. [Limits: -1 <= value <= 1]
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/// @param[in] y The y offset. [Limits: -1 <= value <= 1]
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/// @return The direction that represents the offset.
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public static int RcGetDirForOffset(int x, int y)
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{
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int[] dirs = { 3, 0, -1, 2, 1 };
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return dirs[((y + 1) << 1) + x];
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}
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/// Sets the neighbor connection data for the specified direction.
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/// @param[in] s The span to update.
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/// @param[in] dir The direction to set. [Limits: 0 <= value < 4]
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/// @param[in] i The index of the neighbor span.
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public static void SetCon(CompactSpan s, int dir, int i)
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{
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int shift = dir * 6;
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int con = s.con;
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s.con = (con & ~(0x3f << shift)) | ((i & 0x3f) << shift);
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}
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}
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} |