208 lines
9.5 KiB
C++
208 lines
9.5 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 "b3StridingMeshInterface.h"
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b3StridingMeshInterface::~b3StridingMeshInterface()
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{
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}
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void b3StridingMeshInterface::InternalProcessAllTriangles(b3InternalTriangleIndexCallback* callback, const b3Vector3& aabbMin, const b3Vector3& 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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b3Vector3 triangle[3];
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b3Vector3 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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b3Assert((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((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)graphicsbase[2] * meshScaling.getZ());
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graphicsbase = (double*)(vertexbase + tri_indices[1] * stride);
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triangle[1].setValue((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)graphicsbase[2] * meshScaling.getZ());
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graphicsbase = (double*)(vertexbase + tri_indices[2] * stride);
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triangle[2].setValue((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)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((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)graphicsbase[2] * meshScaling.getZ());
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graphicsbase = (double*)(vertexbase + tri_indices[1] * stride);
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triangle[1].setValue((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)graphicsbase[2] * meshScaling.getZ());
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graphicsbase = (double*)(vertexbase + tri_indices[2] * stride);
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triangle[2].setValue((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)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((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)graphicsbase[2] * meshScaling.getZ());
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graphicsbase = (double*)(vertexbase + tri_indices[1] * stride);
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triangle[1].setValue((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)graphicsbase[2] * meshScaling.getZ());
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graphicsbase = (double*)(vertexbase + tri_indices[2] * stride);
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triangle[2].setValue((b3Scalar)graphicsbase[0] * meshScaling.getX(), (b3Scalar)graphicsbase[1] * meshScaling.getY(), (b3Scalar)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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b3Assert((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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b3Assert((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 b3StridingMeshInterface::calculateAabbBruteForce(b3Vector3& aabbMin, b3Vector3& aabbMax)
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{
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struct AabbCalculationCallback : public b3InternalTriangleIndexCallback
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{
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b3Vector3 m_aabbMin;
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b3Vector3 m_aabbMax;
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AabbCalculationCallback()
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{
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m_aabbMin.setValue(b3Scalar(B3_LARGE_FLOAT), b3Scalar(B3_LARGE_FLOAT), b3Scalar(B3_LARGE_FLOAT));
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m_aabbMax.setValue(b3Scalar(-B3_LARGE_FLOAT), b3Scalar(-B3_LARGE_FLOAT), b3Scalar(-B3_LARGE_FLOAT));
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}
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virtual void internalProcessTriangleIndex(b3Vector3* 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(b3Scalar(-B3_LARGE_FLOAT), b3Scalar(-B3_LARGE_FLOAT), b3Scalar(-B3_LARGE_FLOAT));
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aabbMax.setValue(b3Scalar(B3_LARGE_FLOAT), b3Scalar(B3_LARGE_FLOAT), b3Scalar(B3_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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