2 Bullet Continuous Collision Detection and Physics Library
3 Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
5 This software is provided 'as-is', without any express or implied warranty.
6 In no event will the authors be held liable for any damages arising from the use of this software.
7 Permission is granted to anyone to use this software for any purpose,
8 including commercial applications, and to alter it and redistribute it freely,
9 subject to the following restrictions:
11 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
13 3. This notice may not be removed or altered from any source distribution.
16 #ifndef BT_BVH_TRIANGLE_MESH_SHAPE_H
17 #define BT_BVH_TRIANGLE_MESH_SHAPE_H
19 #include "btTriangleMeshShape.h"
20 #include "btOptimizedBvh.h"
21 #include "LinearMath/btAlignedAllocator.h"
22 #include "btTriangleInfoMap.h"
24 ///The btBvhTriangleMeshShape is a static-triangle mesh shape with several optimizations, such as bounding volume hierarchy and cache friendly traversal for PlayStation 3 Cell SPU. It is recommended to enable useQuantizedAabbCompression for better memory usage.
25 ///It takes a triangle mesh as input, for example a btTriangleMesh or btTriangleIndexVertexArray. The btBvhTriangleMeshShape class allows for triangle mesh deformations by a refit or partialRefit method.
26 ///Instead of building the bounding volume hierarchy acceleration structure, it is also possible to serialize (save) and deserialize (load) the structure from disk.
27 ///See Demos\ConcaveDemo\ConcavePhysicsDemo.cpp for an example.
28 ATTRIBUTE_ALIGNED16(class) btBvhTriangleMeshShape : public btTriangleMeshShape
31 btOptimizedBvh* m_bvh;
32 btTriangleInfoMap* m_triangleInfoMap;
34 bool m_useQuantizedAabbCompression;
36 bool m_pad[11];////need padding due to alignment
40 BT_DECLARE_ALIGNED_ALLOCATOR();
43 btBvhTriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression, bool buildBvh = true);
45 ///optionally pass in a larger bvh aabb, used for quantization. This allows for deformations within this aabb
46 btBvhTriangleMeshShape(btStridingMeshInterface* meshInterface, bool useQuantizedAabbCompression,const btVector3& bvhAabbMin,const btVector3& bvhAabbMax, bool buildBvh = true);
48 virtual ~btBvhTriangleMeshShape();
50 bool getOwnsBvh () const
57 void performRaycast (btTriangleCallback* callback, const btVector3& raySource, const btVector3& rayTarget);
58 void performConvexcast (btTriangleCallback* callback, const btVector3& boxSource, const btVector3& boxTarget, const btVector3& boxMin, const btVector3& boxMax);
60 virtual void processAllTriangles(btTriangleCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const;
62 void refitTree(const btVector3& aabbMin,const btVector3& aabbMax);
64 ///for a fast incremental refit of parts of the tree. Note: the entire AABB of the tree will become more conservative, it never shrinks
65 void partialRefitTree(const btVector3& aabbMin,const btVector3& aabbMax);
68 virtual const char* getName()const {return "BVHTRIANGLEMESH";}
71 virtual void setLocalScaling(const btVector3& scaling);
73 btOptimizedBvh* getOptimizedBvh()
78 void setOptimizedBvh(btOptimizedBvh* bvh, const btVector3& localScaling=btVector3(1,1,1));
80 void buildOptimizedBvh();
82 bool usesQuantizedAabbCompression() const
84 return m_useQuantizedAabbCompression;
87 void setTriangleInfoMap(btTriangleInfoMap* triangleInfoMap)
89 m_triangleInfoMap = triangleInfoMap;
92 const btTriangleInfoMap* getTriangleInfoMap() const
94 return m_triangleInfoMap;
97 btTriangleInfoMap* getTriangleInfoMap()
99 return m_triangleInfoMap;
102 virtual int calculateSerializeBufferSize() const;
104 ///fills the dataBuffer and returns the struct name (and 0 on failure)
105 virtual const char* serialize(void* dataBuffer, btSerializer* serializer) const;
107 virtual void serializeSingleBvh(btSerializer* serializer) const;
109 virtual void serializeSingleTriangleInfoMap(btSerializer* serializer) const;
113 ///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
114 struct btTriangleMeshShapeData
116 btCollisionShapeData m_collisionShapeData;
118 btStridingMeshInterfaceData m_meshInterface;
120 btQuantizedBvhFloatData *m_quantizedFloatBvh;
121 btQuantizedBvhDoubleData *m_quantizedDoubleBvh;
123 btTriangleInfoMapData *m_triangleInfoMap;
125 float m_collisionMargin;
132 SIMD_FORCE_INLINE int btBvhTriangleMeshShape::calculateSerializeBufferSize() const
134 return sizeof(btTriangleMeshShapeData);
139 #endif //BT_BVH_TRIANGLE_MESH_SHAPE_H