mirror of https://github.com/axmolengine/axmol.git
137 lines
4.4 KiB
C
137 lines
4.4 KiB
C
/****************************************************************************
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Copyright (c) 2015-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __CCNAV_MESH_TOOL_H__
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#define __CCNAV_MESH_TOOL_H__
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#include "base/ccConfig.h"
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#if CC_USE_NAVMESH
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#include "platform/CCPlatformMacros.h"
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#include "math/CCMath.h"
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#include "recast/DetourCommon.h"
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#include "recast/DetourNavMesh.h"
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#include "recast/DetourNavMeshQuery.h"
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#include "recast/DetourTileCache.h"
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#include "recast/DetourTileCacheBuilder.h"
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NS_CC_BEGIN
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/**
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* @addtogroup 3d
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* @{
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*/
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struct LinearAllocator : public dtTileCacheAlloc
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{
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unsigned char* buffer;
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int capacity;
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int top;
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int high;
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LinearAllocator(const int cap);
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~LinearAllocator();
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void resize(const int cap);
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virtual void reset();
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virtual void* alloc(const int size);
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virtual void free(void* /*ptr*/);
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};
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struct LZ4Compressor : public dtTileCacheCompressor
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{
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virtual int maxCompressedSize(const int bufferSize);
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virtual dtStatus compress(const unsigned char* buffer, const int bufferSize,
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unsigned char* compressed, const int /*maxCompressedSize*/, int* compressedSize);
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virtual dtStatus decompress(const unsigned char* compressed, const int compressedSize,
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unsigned char* buffer, const int maxBufferSize, int* bufferSize);
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};
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struct GeomData
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{
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static const int MAX_OFFMESH_CONNECTIONS = 256;
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float offMeshConVerts[MAX_OFFMESH_CONNECTIONS * 3 * 2];
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float offMeshConRads[MAX_OFFMESH_CONNECTIONS];
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unsigned char offMeshConDirs[MAX_OFFMESH_CONNECTIONS];
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unsigned char offMeshConAreas[MAX_OFFMESH_CONNECTIONS];
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unsigned short offMeshConFlags[MAX_OFFMESH_CONNECTIONS];
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unsigned int offMeshConId[MAX_OFFMESH_CONNECTIONS];
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int offMeshConCount;
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};
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struct MeshProcess : public dtTileCacheMeshProcess
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{
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const GeomData *data;
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MeshProcess(const GeomData *geom);
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virtual ~MeshProcess();
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//void init(InputGeom* geom)
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//{
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// m_geom = geom;
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//}
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virtual void process(struct dtNavMeshCreateParams* params,
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unsigned char* polyAreas, unsigned short* polyFlags) override;
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};
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bool inRange(const float* v1, const float* v2, const float r, const float h);
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int fixupCorridor(dtPolyRef* path, const int npath, const int maxPath,
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const dtPolyRef* visited, const int nvisited);
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// This function checks if the path has a small U-turn, that is,
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// a polygon further in the path is adjacent to the first polygon
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// in the path. If that happens, a shortcut is taken.
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// This can happen if the target (T) location is at tile boundary,
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// and we're (S) approaching it parallel to the tile edge.
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// The choice at the vertex can be arbitrary,
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// +---+---+
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// |:::|:::|
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// +-S-+-T-+
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// |:::| | <-- the step can end up in here, resulting U-turn path.
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// +---+---+
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int fixupShortcuts(dtPolyRef* path, int npath, dtNavMeshQuery* navQuery);
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bool getSteerTarget(dtNavMeshQuery* navQuery, const float* startPos, const float* endPos,
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const float minTargetDist,
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const dtPolyRef* path, const int pathSize,
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float* steerPos, unsigned char& steerPosFlag, dtPolyRef& steerPosRef,
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float* outPoints = nullptr, int* outPointCount = nullptr);
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/** @} */
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NS_CC_END
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#endif //CC_USE_NAVMESH
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#endif // __CCNAV_MESH_H__
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