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Diffstat (limited to 'thirdparty/bullet/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp')
-rw-r--r-- | thirdparty/bullet/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp | 500 |
1 files changed, 0 insertions, 500 deletions
diff --git a/thirdparty/bullet/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp b/thirdparty/bullet/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp deleted file mode 100644 index 4854f370f7..0000000000 --- a/thirdparty/bullet/src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.cpp +++ /dev/null @@ -1,500 +0,0 @@ -/* -Bullet Continuous Collision Detection and Physics Library -Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org - -This software is provided 'as-is', without any express or implied warranty. -In no event will the authors be held liable for any damages arising from the use of this software. -Permission is granted to anyone to use this software for any purpose, -including commercial applications, and to alter it and redistribute it freely, -subject to the following restrictions: - -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. -2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. -3. This notice may not be removed or altered from any source distribution. -*/ -#if defined (_WIN32) || defined (__i386__) -#define BT_USE_SSE_IN_API -#endif - -#include "BulletCollision/CollisionShapes/btPolyhedralConvexShape.h" -#include "btConvexPolyhedron.h" -#include "LinearMath/btConvexHullComputer.h" -#include <new> -#include "LinearMath/btGeometryUtil.h" -#include "LinearMath/btGrahamScan2dConvexHull.h" - - -btPolyhedralConvexShape::btPolyhedralConvexShape() :btConvexInternalShape(), -m_polyhedron(0) -{ - -} - -btPolyhedralConvexShape::~btPolyhedralConvexShape() -{ - if (m_polyhedron) - { - m_polyhedron->~btConvexPolyhedron(); - btAlignedFree(m_polyhedron); - } -} - - -bool btPolyhedralConvexShape::initializePolyhedralFeatures(int shiftVerticesByMargin) -{ - - if (m_polyhedron) - { - m_polyhedron->~btConvexPolyhedron(); - btAlignedFree(m_polyhedron); - } - - void* mem = btAlignedAlloc(sizeof(btConvexPolyhedron),16); - m_polyhedron = new (mem) btConvexPolyhedron; - - btAlignedObjectArray<btVector3> orgVertices; - - for (int i=0;i<getNumVertices();i++) - { - btVector3& newVertex = orgVertices.expand(); - getVertex(i,newVertex); - } - - btConvexHullComputer conv; - - if (shiftVerticesByMargin) - { - btAlignedObjectArray<btVector3> planeEquations; - btGeometryUtil::getPlaneEquationsFromVertices(orgVertices,planeEquations); - - btAlignedObjectArray<btVector3> shiftedPlaneEquations; - for (int p=0;p<planeEquations.size();p++) - { - btVector3 plane = planeEquations[p]; - // btScalar margin = getMargin(); - plane[3] -= getMargin(); - shiftedPlaneEquations.push_back(plane); - } - - btAlignedObjectArray<btVector3> tmpVertices; - - btGeometryUtil::getVerticesFromPlaneEquations(shiftedPlaneEquations,tmpVertices); - - conv.compute(&tmpVertices[0].getX(), sizeof(btVector3),tmpVertices.size(),0.f,0.f); - } else - { - - conv.compute(&orgVertices[0].getX(), sizeof(btVector3),orgVertices.size(),0.f,0.f); - } - - - - btAlignedObjectArray<btVector3> faceNormals; - int numFaces = conv.faces.size(); - faceNormals.resize(numFaces); - btConvexHullComputer* convexUtil = &conv; - - - btAlignedObjectArray<btFace> tmpFaces; - tmpFaces.resize(numFaces); - - int numVertices = convexUtil->vertices.size(); - m_polyhedron->m_vertices.resize(numVertices); - for (int p=0;p<numVertices;p++) - { - m_polyhedron->m_vertices[p] = convexUtil->vertices[p]; - } - - - for (int i=0;i<numFaces;i++) - { - int face = convexUtil->faces[i]; - //printf("face=%d\n",face); - const btConvexHullComputer::Edge* firstEdge = &convexUtil->edges[face]; - const btConvexHullComputer::Edge* edge = firstEdge; - - btVector3 edges[3]; - int numEdges = 0; - //compute face normals - - do - { - - int src = edge->getSourceVertex(); - tmpFaces[i].m_indices.push_back(src); - int targ = edge->getTargetVertex(); - btVector3 wa = convexUtil->vertices[src]; - - btVector3 wb = convexUtil->vertices[targ]; - btVector3 newEdge = wb-wa; - newEdge.normalize(); - if (numEdges<2) - edges[numEdges++] = newEdge; - - edge = edge->getNextEdgeOfFace(); - } while (edge!=firstEdge); - - btScalar planeEq = 1e30f; - - - if (numEdges==2) - { - faceNormals[i] = edges[0].cross(edges[1]); - faceNormals[i].normalize(); - tmpFaces[i].m_plane[0] = faceNormals[i].getX(); - tmpFaces[i].m_plane[1] = faceNormals[i].getY(); - tmpFaces[i].m_plane[2] = faceNormals[i].getZ(); - tmpFaces[i].m_plane[3] = planeEq; - - } - else - { - btAssert(0);//degenerate? - faceNormals[i].setZero(); - } - - for (int v=0;v<tmpFaces[i].m_indices.size();v++) - { - btScalar eq = m_polyhedron->m_vertices[tmpFaces[i].m_indices[v]].dot(faceNormals[i]); - if (planeEq>eq) - { - planeEq=eq; - } - } - tmpFaces[i].m_plane[3] = -planeEq; - } - - //merge coplanar faces and copy them to m_polyhedron - - btScalar faceWeldThreshold= 0.999f; - btAlignedObjectArray<int> todoFaces; - for (int i=0;i<tmpFaces.size();i++) - todoFaces.push_back(i); - - while (todoFaces.size()) - { - btAlignedObjectArray<int> coplanarFaceGroup; - int refFace = todoFaces[todoFaces.size()-1]; - - coplanarFaceGroup.push_back(refFace); - btFace& faceA = tmpFaces[refFace]; - todoFaces.pop_back(); - - btVector3 faceNormalA(faceA.m_plane[0],faceA.m_plane[1],faceA.m_plane[2]); - for (int j=todoFaces.size()-1;j>=0;j--) - { - int i = todoFaces[j]; - btFace& faceB = tmpFaces[i]; - btVector3 faceNormalB(faceB.m_plane[0],faceB.m_plane[1],faceB.m_plane[2]); - if (faceNormalA.dot(faceNormalB)>faceWeldThreshold) - { - coplanarFaceGroup.push_back(i); - todoFaces.remove(i); - } - } - - - bool did_merge = false; - if (coplanarFaceGroup.size()>1) - { - //do the merge: use Graham Scan 2d convex hull - - btAlignedObjectArray<GrahamVector3> orgpoints; - btVector3 averageFaceNormal(0,0,0); - - for (int i=0;i<coplanarFaceGroup.size();i++) - { -// m_polyhedron->m_faces.push_back(tmpFaces[coplanarFaceGroup[i]]); - - btFace& face = tmpFaces[coplanarFaceGroup[i]]; - btVector3 faceNormal(face.m_plane[0],face.m_plane[1],face.m_plane[2]); - averageFaceNormal+=faceNormal; - for (int f=0;f<face.m_indices.size();f++) - { - int orgIndex = face.m_indices[f]; - btVector3 pt = m_polyhedron->m_vertices[orgIndex]; - - bool found = false; - - for (int i=0;i<orgpoints.size();i++) - { - //if ((orgpoints[i].m_orgIndex == orgIndex) || ((rotatedPt-orgpoints[i]).length2()<0.0001)) - if (orgpoints[i].m_orgIndex == orgIndex) - { - found=true; - break; - } - } - if (!found) - orgpoints.push_back(GrahamVector3(pt,orgIndex)); - } - } - - - - btFace combinedFace; - for (int i=0;i<4;i++) - combinedFace.m_plane[i] = tmpFaces[coplanarFaceGroup[0]].m_plane[i]; - - btAlignedObjectArray<GrahamVector3> hull; - - averageFaceNormal.normalize(); - GrahamScanConvexHull2D(orgpoints,hull,averageFaceNormal); - - for (int i=0;i<hull.size();i++) - { - combinedFace.m_indices.push_back(hull[i].m_orgIndex); - for(int k = 0; k < orgpoints.size(); k++) - { - if(orgpoints[k].m_orgIndex == hull[i].m_orgIndex) - { - orgpoints[k].m_orgIndex = -1; // invalidate... - break; - } - } - } - - // are there rejected vertices? - bool reject_merge = false; - - - - for(int i = 0; i < orgpoints.size(); i++) { - if(orgpoints[i].m_orgIndex == -1) - continue; // this is in the hull... - // this vertex is rejected -- is anybody else using this vertex? - for(int j = 0; j < tmpFaces.size(); j++) { - - btFace& face = tmpFaces[j]; - // is this a face of the current coplanar group? - bool is_in_current_group = false; - for(int k = 0; k < coplanarFaceGroup.size(); k++) { - if(coplanarFaceGroup[k] == j) { - is_in_current_group = true; - break; - } - } - if(is_in_current_group) // ignore this face... - continue; - // does this face use this rejected vertex? - for(int v = 0; v < face.m_indices.size(); v++) { - if(face.m_indices[v] == orgpoints[i].m_orgIndex) { - // this rejected vertex is used in another face -- reject merge - reject_merge = true; - break; - } - } - if(reject_merge) - break; - } - if(reject_merge) - break; - } - - if (!reject_merge) - { - // do this merge! - did_merge = true; - m_polyhedron->m_faces.push_back(combinedFace); - } - } - if(!did_merge) - { - for (int i=0;i<coplanarFaceGroup.size();i++) - { - btFace face = tmpFaces[coplanarFaceGroup[i]]; - m_polyhedron->m_faces.push_back(face); - } - - } - - - - } - - m_polyhedron->initialize(); - - return true; -} - -#ifndef MIN - #define MIN(_a, _b) ((_a) < (_b) ? (_a) : (_b)) -#endif - -btVector3 btPolyhedralConvexShape::localGetSupportingVertexWithoutMargin(const btVector3& vec0)const -{ - - - btVector3 supVec(0,0,0); -#ifndef __SPU__ - int i; - btScalar maxDot(btScalar(-BT_LARGE_FLOAT)); - - btVector3 vec = vec0; - btScalar lenSqr = vec.length2(); - if (lenSqr < btScalar(0.0001)) - { - vec.setValue(1,0,0); - } else - { - btScalar rlen = btScalar(1.) / btSqrt(lenSqr ); - vec *= rlen; - } - - btVector3 vtx; - btScalar newDot; - - for( int k = 0; k < getNumVertices(); k += 128 ) - { - btVector3 temp[128]; - int inner_count = MIN(getNumVertices() - k, 128); - for( i = 0; i < inner_count; i++ ) - getVertex(i,temp[i]); - i = (int) vec.maxDot( temp, inner_count, newDot); - if (newDot > maxDot) - { - maxDot = newDot; - supVec = temp[i]; - } - } - -#endif //__SPU__ - return supVec; -} - - - -void btPolyhedralConvexShape::batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const -{ -#ifndef __SPU__ - int i; - - btVector3 vtx; - btScalar newDot; - - for (i=0;i<numVectors;i++) - { - supportVerticesOut[i][3] = btScalar(-BT_LARGE_FLOAT); - } - - for (int j=0;j<numVectors;j++) - { - const btVector3& vec = vectors[j]; - - for( int k = 0; k < getNumVertices(); k += 128 ) - { - btVector3 temp[128]; - int inner_count = MIN(getNumVertices() - k, 128); - for( i = 0; i < inner_count; i++ ) - getVertex(i,temp[i]); - i = (int) vec.maxDot( temp, inner_count, newDot); - if (newDot > supportVerticesOut[j][3]) - { - supportVerticesOut[j] = temp[i]; - supportVerticesOut[j][3] = newDot; - } - } - } - -#endif //__SPU__ -} - - - -void btPolyhedralConvexShape::calculateLocalInertia(btScalar mass,btVector3& inertia) const -{ -#ifndef __SPU__ - //not yet, return box inertia - - btScalar margin = getMargin(); - - btTransform ident; - ident.setIdentity(); - btVector3 aabbMin,aabbMax; - getAabb(ident,aabbMin,aabbMax); - btVector3 halfExtents = (aabbMax-aabbMin)*btScalar(0.5); - - btScalar lx=btScalar(2.)*(halfExtents.x()+margin); - btScalar ly=btScalar(2.)*(halfExtents.y()+margin); - btScalar lz=btScalar(2.)*(halfExtents.z()+margin); - const btScalar x2 = lx*lx; - const btScalar y2 = ly*ly; - const btScalar z2 = lz*lz; - const btScalar scaledmass = mass * btScalar(0.08333333); - - inertia = scaledmass * (btVector3(y2+z2,x2+z2,x2+y2)); -#endif //__SPU__ -} - - - -void btPolyhedralConvexAabbCachingShape::setLocalScaling(const btVector3& scaling) -{ - btConvexInternalShape::setLocalScaling(scaling); - recalcLocalAabb(); -} - -btPolyhedralConvexAabbCachingShape::btPolyhedralConvexAabbCachingShape() -:btPolyhedralConvexShape(), -m_localAabbMin(1,1,1), -m_localAabbMax(-1,-1,-1), -m_isLocalAabbValid(false) -{ -} - -void btPolyhedralConvexAabbCachingShape::getAabb(const btTransform& trans,btVector3& aabbMin,btVector3& aabbMax) const -{ - getNonvirtualAabb(trans,aabbMin,aabbMax,getMargin()); -} - -void btPolyhedralConvexAabbCachingShape::recalcLocalAabb() -{ - m_isLocalAabbValid = true; - - #if 1 - static const btVector3 _directions[] = - { - btVector3( 1., 0., 0.), - btVector3( 0., 1., 0.), - btVector3( 0., 0., 1.), - btVector3( -1., 0., 0.), - btVector3( 0., -1., 0.), - btVector3( 0., 0., -1.) - }; - - btVector3 _supporting[] = - { - btVector3( 0., 0., 0.), - btVector3( 0., 0., 0.), - btVector3( 0., 0., 0.), - btVector3( 0., 0., 0.), - btVector3( 0., 0., 0.), - btVector3( 0., 0., 0.) - }; - - batchedUnitVectorGetSupportingVertexWithoutMargin(_directions, _supporting, 6); - - for ( int i = 0; i < 3; ++i ) - { - m_localAabbMax[i] = _supporting[i][i] + m_collisionMargin; - m_localAabbMin[i] = _supporting[i + 3][i] - m_collisionMargin; - } - - #else - - for (int i=0;i<3;i++) - { - btVector3 vec(btScalar(0.),btScalar(0.),btScalar(0.)); - vec[i] = btScalar(1.); - btVector3 tmp = localGetSupportingVertex(vec); - m_localAabbMax[i] = tmp[i]; - vec[i] = btScalar(-1.); - tmp = localGetSupportingVertex(vec); - m_localAabbMin[i] = tmp[i]; - } - #endif -} - - - - |