381 lines
16 KiB
C++
381 lines
16 KiB
C++
/*
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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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case PHY_UCHAR:
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{
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for (gfxindex = 0; gfxindex < numtriangles; gfxindex++)
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{
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unsigned char* tri_indices = (unsigned char*)(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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case PHY_UCHAR:
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{
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for (gfxindex = 0; gfxindex < numtriangles; gfxindex++)
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{
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unsigned char* tri_indices = (unsigned char*)(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_3indices8 = 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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// Fill padding with zeros to appease msan.
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tmpIndices[gfxindex].m_pad[0] = 0;
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tmpIndices[gfxindex].m_pad[1] = 0;
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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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case PHY_UCHAR:
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{
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if (numtriangles)
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{
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btChunk* chunk = serializer->allocate(sizeof(btCharIndexTripletData), numtriangles);
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btCharIndexTripletData* tmpIndices = (btCharIndexTripletData*)chunk->m_oldPtr;
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memPtr->m_3indices8 = (btCharIndexTripletData*)serializer->getUniquePointer(tmpIndices);
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for (gfxindex = 0; gfxindex < numtriangles; gfxindex++)
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{
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unsigned char* tri_indices = (unsigned char*)(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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// Fill padding with zeros to appease msan.
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tmpIndices[gfxindex].m_pad = 0;
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}
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serializer->finalizeChunk(chunk, "btCharIndexTripletData", 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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// Fill padding with zeros to appease msan.
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memset(trimeshData->m_padding, 0, sizeof(trimeshData->m_padding));
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m_scaling.serializeFloat(trimeshData->m_scaling);
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return "btStridingMeshInterfaceData";
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}
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