332 lines
13 KiB
C++
332 lines
13 KiB
C++
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/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages 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 freely,
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subject to the following restrictions:
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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.
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2. Altered source versions must be plainly marked as such, and must not be 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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#include "btStridingMeshInterface.h"
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#include "LinearMath/btSerializer.h"
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btStridingMeshInterface::~btStridingMeshInterface()
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{
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}
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void btStridingMeshInterface::InternalProcessAllTriangles(btInternalTriangleIndexCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const
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{
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(void)aabbMin;
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(void)aabbMax;
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int numtotalphysicsverts = 0;
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int part,graphicssubparts = getNumSubParts();
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const unsigned char * vertexbase;
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const unsigned char * indexbase;
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int indexstride;
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PHY_ScalarType type;
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PHY_ScalarType gfxindextype;
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int stride,numverts,numtriangles;
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int gfxindex;
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btVector3 triangle[3];
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btVector3 meshScaling = getScaling();
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///if the number of parts is big, the performance might drop due to the innerloop switch on indextype
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for (part=0;part<graphicssubparts ;part++)
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{
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getLockedReadOnlyVertexIndexBase(&vertexbase,numverts,type,stride,&indexbase,indexstride,numtriangles,gfxindextype,part);
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numtotalphysicsverts+=numtriangles*3; //upper bound
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///unlike that developers want to pass in double-precision meshes in single-precision Bullet build
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///so disable this feature by default
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///see patch http://code.google.com/p/bullet/issues/detail?id=213
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switch (type)
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{
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case PHY_FLOAT:
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{
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float* graphicsbase;
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switch (gfxindextype)
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{
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case PHY_INTEGER:
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{
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for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
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{
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unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride);
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graphicsbase = (float*)(vertexbase+tri_indices[0]*stride);
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triangle[0].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (float*)(vertexbase+tri_indices[1]*stride);
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triangle[1].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (float*)(vertexbase+tri_indices[2]*stride);
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triangle[2].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ());
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callback->internalProcessTriangleIndex(triangle,part,gfxindex);
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}
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break;
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}
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case PHY_SHORT:
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{
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for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
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{
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unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride);
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graphicsbase = (float*)(vertexbase+tri_indices[0]*stride);
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triangle[0].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (float*)(vertexbase+tri_indices[1]*stride);
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triangle[1].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (float*)(vertexbase+tri_indices[2]*stride);
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triangle[2].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ());
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callback->internalProcessTriangleIndex(triangle,part,gfxindex);
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}
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break;
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}
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default:
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btAssert((gfxindextype == PHY_INTEGER) || (gfxindextype == PHY_SHORT));
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}
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break;
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}
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case PHY_DOUBLE:
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{
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double* graphicsbase;
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switch (gfxindextype)
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{
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case PHY_INTEGER:
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{
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for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
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{
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unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride);
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graphicsbase = (double*)(vertexbase+tri_indices[0]*stride);
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triangle[0].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(),(btScalar)graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (double*)(vertexbase+tri_indices[1]*stride);
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triangle[1].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (double*)(vertexbase+tri_indices[2]*stride);
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triangle[2].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ());
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callback->internalProcessTriangleIndex(triangle,part,gfxindex);
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}
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break;
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}
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case PHY_SHORT:
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{
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for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
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{
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unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride);
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graphicsbase = (double*)(vertexbase+tri_indices[0]*stride);
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triangle[0].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(),(btScalar)graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (double*)(vertexbase+tri_indices[1]*stride);
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triangle[1].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ());
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graphicsbase = (double*)(vertexbase+tri_indices[2]*stride);
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triangle[2].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ());
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callback->internalProcessTriangleIndex(triangle,part,gfxindex);
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}
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break;
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}
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default:
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btAssert((gfxindextype == PHY_INTEGER) || (gfxindextype == PHY_SHORT));
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}
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break;
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}
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default:
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btAssert((type == PHY_FLOAT) || (type == PHY_DOUBLE));
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}
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unLockReadOnlyVertexBase(part);
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}
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}
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void btStridingMeshInterface::calculateAabbBruteForce(btVector3& aabbMin,btVector3& aabbMax)
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{
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struct AabbCalculationCallback : public btInternalTriangleIndexCallback
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{
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btVector3 m_aabbMin;
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btVector3 m_aabbMax;
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AabbCalculationCallback()
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{
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m_aabbMin.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT));
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m_aabbMax.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT));
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}
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virtual void internalProcessTriangleIndex(btVector3* triangle,int partId,int triangleIndex)
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{
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(void)partId;
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(void)triangleIndex;
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m_aabbMin.setMin(triangle[0]);
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m_aabbMax.setMax(triangle[0]);
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m_aabbMin.setMin(triangle[1]);
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m_aabbMax.setMax(triangle[1]);
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m_aabbMin.setMin(triangle[2]);
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m_aabbMax.setMax(triangle[2]);
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}
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};
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//first calculate the total aabb for all triangles
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AabbCalculationCallback aabbCallback;
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aabbMin.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT));
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aabbMax.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT));
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InternalProcessAllTriangles(&aabbCallback,aabbMin,aabbMax);
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aabbMin = aabbCallback.m_aabbMin;
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aabbMax = aabbCallback.m_aabbMax;
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}
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///fills the dataBuffer and returns the struct name (and 0 on failure)
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const char* btStridingMeshInterface::serialize(void* dataBuffer, btSerializer* serializer) const
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{
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btStridingMeshInterfaceData* trimeshData = (btStridingMeshInterfaceData*) dataBuffer;
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trimeshData->m_numMeshParts = getNumSubParts();
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//void* uniquePtr = 0;
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trimeshData->m_meshPartsPtr = 0;
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if (trimeshData->m_numMeshParts)
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{
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btChunk* chunk = serializer->allocate(sizeof(btMeshPartData),trimeshData->m_numMeshParts);
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btMeshPartData* memPtr = (btMeshPartData*)chunk->m_oldPtr;
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trimeshData->m_meshPartsPtr = (btMeshPartData *)serializer->getUniquePointer(memPtr);
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// int numtotalphysicsverts = 0;
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int part,graphicssubparts = getNumSubParts();
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const unsigned char * vertexbase;
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const unsigned char * indexbase;
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int indexstride;
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PHY_ScalarType type;
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PHY_ScalarType gfxindextype;
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int stride,numverts,numtriangles;
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int gfxindex;
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// btVector3 triangle[3];
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btVector3 meshScaling = getScaling();
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///if the number of parts is big, the performance might drop due to the innerloop switch on indextype
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for (part=0;part<graphicssubparts ;part++,memPtr++)
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{
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getLockedReadOnlyVertexIndexBase(&vertexbase,numverts,type,stride,&indexbase,indexstride,numtriangles,gfxindextype,part);
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memPtr->m_numTriangles = numtriangles;//indices = 3*numtriangles
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memPtr->m_numVertices = numverts;
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memPtr->m_indices16 = 0;
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memPtr->m_indices32 = 0;
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memPtr->m_3indices16 = 0;
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memPtr->m_vertices3f = 0;
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memPtr->m_vertices3d = 0;
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switch (gfxindextype)
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{
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case PHY_INTEGER:
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{
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int numindices = numtriangles*3;
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if (numindices)
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{
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btChunk* chunk = serializer->allocate(sizeof(btIntIndexData),numindices);
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btIntIndexData* tmpIndices = (btIntIndexData*)chunk->m_oldPtr;
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memPtr->m_indices32 = (btIntIndexData*)serializer->getUniquePointer(tmpIndices);
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for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
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{
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unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride);
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tmpIndices[gfxindex*3].m_value = tri_indices[0];
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tmpIndices[gfxindex*3+1].m_value = tri_indices[1];
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tmpIndices[gfxindex*3+2].m_value = tri_indices[2];
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}
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serializer->finalizeChunk(chunk,"btIntIndexData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr);
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}
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break;
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}
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case PHY_SHORT:
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{
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if (numtriangles)
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{
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btChunk* chunk = serializer->allocate(sizeof(btShortIntIndexTripletData),numtriangles);
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btShortIntIndexTripletData* tmpIndices = (btShortIntIndexTripletData*)chunk->m_oldPtr;
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memPtr->m_3indices16 = (btShortIntIndexTripletData*) serializer->getUniquePointer(tmpIndices);
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for (gfxindex=0;gfxindex<numtriangles;gfxindex++)
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{
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unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride);
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tmpIndices[gfxindex].m_values[0] = tri_indices[0];
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tmpIndices[gfxindex].m_values[1] = tri_indices[1];
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tmpIndices[gfxindex].m_values[2] = tri_indices[2];
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}
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serializer->finalizeChunk(chunk,"btShortIntIndexTripletData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr);
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}
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break;
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}
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default:
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{
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btAssert(0);
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//unknown index type
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}
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}
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switch (type)
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{
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case PHY_FLOAT:
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{
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float* graphicsbase;
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if (numverts)
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{
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btChunk* chunk = serializer->allocate(sizeof(btVector3FloatData),numverts);
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btVector3FloatData* tmpVertices = (btVector3FloatData*) chunk->m_oldPtr;
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memPtr->m_vertices3f = (btVector3FloatData *)serializer->getUniquePointer(tmpVertices);
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for (int i=0;i<numverts;i++)
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{
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graphicsbase = (float*)(vertexbase+i*stride);
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tmpVertices[i].m_floats[0] = graphicsbase[0];
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tmpVertices[i].m_floats[1] = graphicsbase[1];
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tmpVertices[i].m_floats[2] = graphicsbase[2];
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}
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serializer->finalizeChunk(chunk,"btVector3FloatData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr);
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}
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break;
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}
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case PHY_DOUBLE:
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{
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if (numverts)
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{
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btChunk* chunk = serializer->allocate(sizeof(btVector3DoubleData),numverts);
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btVector3DoubleData* tmpVertices = (btVector3DoubleData*) chunk->m_oldPtr;
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memPtr->m_vertices3d = (btVector3DoubleData *) serializer->getUniquePointer(tmpVertices);
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for (int i=0;i<numverts;i++)
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{
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double* graphicsbase = (double*)(vertexbase+i*stride);//for now convert to float, might leave it at double
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tmpVertices[i].m_floats[0] = graphicsbase[0];
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tmpVertices[i].m_floats[1] = graphicsbase[1];
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tmpVertices[i].m_floats[2] = graphicsbase[2];
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}
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serializer->finalizeChunk(chunk,"btVector3DoubleData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr);
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}
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break;
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}
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default:
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btAssert((type == PHY_FLOAT) || (type == PHY_DOUBLE));
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}
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unLockReadOnlyVertexBase(part);
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}
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serializer->finalizeChunk(chunk,"btMeshPartData",BT_ARRAY_CODE,chunk->m_oldPtr);
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}
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m_scaling.serializeFloat(trimeshData->m_scaling);
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return "btStridingMeshInterfaceData";
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}
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