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_STRIDING_MESHINTERFACE_H
17 #define BT_STRIDING_MESHINTERFACE_H
19 #include "LinearMath/btVector3.h"
20 #include "btTriangleCallback.h"
21 #include "btConcaveShape.h"
27 /// The btStridingMeshInterface is the interface class for high performance generic access to triangle meshes, used in combination with btBvhTriangleMeshShape and some other collision shapes.
28 /// Using index striding of 3*sizeof(integer) it can use triangle arrays, using index striding of 1*sizeof(integer) it can handle triangle strips.
29 /// It allows for sharing graphics and collision meshes. Also it provides locking/unlocking of graphics meshes that are in gpu memory.
30 ATTRIBUTE_ALIGNED16(class ) btStridingMeshInterface
37 BT_DECLARE_ALIGNED_ALLOCATOR();
39 btStridingMeshInterface() :m_scaling(btScalar(1.),btScalar(1.),btScalar(1.))
44 virtual ~btStridingMeshInterface();
48 virtual void InternalProcessAllTriangles(btInternalTriangleIndexCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const;
50 ///brute force method to calculate aabb
51 void calculateAabbBruteForce(btVector3& aabbMin,btVector3& aabbMax);
53 /// get read and write access to a subpart of a triangle mesh
54 /// this subpart has a continuous array of vertices and indices
55 /// in this way the mesh can be handled as chunks of memory with striding
56 /// very similar to OpenGL vertexarray support
57 /// make a call to unLockVertexBase when the read and write access is finished
58 virtual void getLockedVertexIndexBase(unsigned char **vertexbase, int& numverts,PHY_ScalarType& type, int& stride,unsigned char **indexbase,int & indexstride,int& numfaces,PHY_ScalarType& indicestype,int subpart=0)=0;
60 virtual void getLockedReadOnlyVertexIndexBase(const unsigned char **vertexbase, int& numverts,PHY_ScalarType& type, int& stride,const unsigned char **indexbase,int & indexstride,int& numfaces,PHY_ScalarType& indicestype,int subpart=0) const=0;
62 /// unLockVertexBase finishes the access to a subpart of the triangle mesh
63 /// make a call to unLockVertexBase when the read and write access (using getLockedVertexIndexBase) is finished
64 virtual void unLockVertexBase(int subpart)=0;
66 virtual void unLockReadOnlyVertexBase(int subpart) const=0;
69 /// getNumSubParts returns the number of seperate subparts
70 /// each subpart has a continuous array of vertices and indices
71 virtual int getNumSubParts() const=0;
73 virtual void preallocateVertices(int numverts)=0;
74 virtual void preallocateIndices(int numindices)=0;
76 virtual bool hasPremadeAabb() const { return false; }
77 virtual void setPremadeAabb(const btVector3& aabbMin, const btVector3& aabbMax ) const
82 virtual void getPremadeAabb(btVector3* aabbMin, btVector3* aabbMax ) const
88 const btVector3& getScaling() const {
91 void setScaling(const btVector3& scaling)
96 virtual int calculateSerializeBufferSize() const;
98 ///fills the dataBuffer and returns the struct name (and 0 on failure)
99 virtual const char* serialize(void* dataBuffer, btSerializer* serializer) const;
104 struct btIntIndexData
109 struct btShortIntIndexData
115 struct btShortIntIndexTripletData
121 struct btCharIndexTripletData
123 unsigned char m_values[3];
128 ///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
129 struct btMeshPartData
131 btVector3FloatData *m_vertices3f;
132 btVector3DoubleData *m_vertices3d;
134 btIntIndexData *m_indices32;
135 btShortIntIndexTripletData *m_3indices16;
136 btCharIndexTripletData *m_3indices8;
138 btShortIntIndexData *m_indices16;//backwards compatibility
140 int m_numTriangles;//length of m_indices = m_numTriangles
145 ///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
146 struct btStridingMeshInterfaceData
148 btMeshPartData *m_meshPartsPtr;
149 btVector3FloatData m_scaling;
157 SIMD_FORCE_INLINE int btStridingMeshInterface::calculateSerializeBufferSize() const
159 return sizeof(btStridingMeshInterfaceData);
164 #endif //BT_STRIDING_MESHINTERFACE_H