Bullet Collision Detection & Physics Library: btPolyhedralConvexShape.cpp Source File

Bullet Collision Detection & Physics Library

btPolyhedralConvexShape.cpp
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1/*
2Bullet Continuous Collision Detection and Physics Library
3Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
4
5This software is provided 'as-is', without any express or implied warranty.
6In no event will the authors be held liable for any damages arising from the use of this software.
7Permission is granted to anyone to use this software for any purpose,
8including commercial applications, and to alter it and redistribute it freely,
9subject to the following restrictions:
10
111. 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.
122. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
133. This notice may not be removed or altered from any source distribution.
14*/
15#if defined(_WIN32) || defined(__i386__)
16#define BT_USE_SSE_IN_API
17#endif
18
19#include "BulletCollision/CollisionShapes/btPolyhedralConvexShape.h"
20#include "btConvexPolyhedron.h"
21#include "LinearMath/btConvexHullComputer.h"
22#include <new>
23#include "LinearMath/btGeometryUtil.h"
24#include "LinearMath/btGrahamScan2dConvexHull.h"
25
26btPolyhedralConvexShape::btPolyhedralConvexShape() : btConvexInternalShape(),
27 m_polyhedron(0)
28{
29}
30
31btPolyhedralConvexShape::~btPolyhedralConvexShape()
32{
33 if (m_polyhedron)
34 {
35 m_polyhedron->~btConvexPolyhedron();
36 btAlignedFree(m_polyhedron);
37 }
38}
39
40 void btPolyhedralConvexShape::setPolyhedralFeatures(btConvexPolyhedron& polyhedron)
41{
42 if (m_polyhedron)
43 {
44 *m_polyhedron = polyhedron;
45 }
46 else
47 {
48 void* mem = btAlignedAlloc(sizeof(btConvexPolyhedron), 16);
49 m_polyhedron = new (mem) btConvexPolyhedron(polyhedron);
50 }
51}
52
53 bool btPolyhedralConvexShape::initializePolyhedralFeatures(int shiftVerticesByMargin)
54{
55 if (m_polyhedron)
56 {
57 m_polyhedron->~btConvexPolyhedron();
58 btAlignedFree(m_polyhedron);
59 }
60
61 void* mem = btAlignedAlloc(sizeof(btConvexPolyhedron), 16);
62 m_polyhedron = new (mem) btConvexPolyhedron;
63
64 btAlignedObjectArray<btVector3> orgVertices;
65
66 for (int i = 0; i < getNumVertices(); i++)
67 {
68 btVector3& newVertex = orgVertices.expand();
69 getVertex(i, newVertex);
70 }
71
72 btConvexHullComputer conv;
73
74 if (shiftVerticesByMargin)
75 {
76 btAlignedObjectArray<btVector3> planeEquations;
77 btGeometryUtil::getPlaneEquationsFromVertices(orgVertices, planeEquations);
78
79 btAlignedObjectArray<btVector3> shiftedPlaneEquations;
80 for (int p = 0; p < planeEquations.size(); p++)
81 {
82 btVector3 plane = planeEquations[p];
83 // btScalar margin = getMargin();
84 plane[3] -= getMargin();
85 shiftedPlaneEquations.push_back(plane);
86 }
87
88 btAlignedObjectArray<btVector3> tmpVertices;
89
90 btGeometryUtil::getVerticesFromPlaneEquations(shiftedPlaneEquations, tmpVertices);
91
92 conv.compute(&tmpVertices[0].getX(), sizeof(btVector3), tmpVertices.size(), 0.f, 0.f);
93 }
94 else
95 {
96 conv.compute(&orgVertices[0].getX(), sizeof(btVector3), orgVertices.size(), 0.f, 0.f);
97 }
98
99#ifndef BT_RECONSTRUCT_FACES
100
101 int numVertices = conv.vertices.size();
102 m_polyhedron->m_vertices.resize(numVertices);
103 for (int p = 0; p < numVertices; p++)
104 {
105 m_polyhedron->m_vertices[p] = conv.vertices[p];
106 }
107
108 int v0, v1;
109 for (int j = 0; j < conv.faces.size(); j++)
110 {
111 btVector3 edges[3];
112 int numEdges = 0;
113 btFace combinedFace;
114 const btConvexHullComputer::Edge* edge = &conv.edges[conv.faces[j]];
115 v0 = edge->getSourceVertex();
116 int prevVertex = v0;
117 combinedFace.m_indices.push_back(v0);
118 v1 = edge->getTargetVertex();
119 while (v1 != v0)
120 {
121 btVector3 wa = conv.vertices[prevVertex];
122 btVector3 wb = conv.vertices[v1];
123 btVector3 newEdge = wb - wa;
124 newEdge.normalize();
125 if (numEdges < 2)
126 edges[numEdges++] = newEdge;
127
128 //face->addIndex(v1);
129 combinedFace.m_indices.push_back(v1);
130 edge = edge->getNextEdgeOfFace();
131 prevVertex = v1;
132 int v01 = edge->getSourceVertex();
133 v1 = edge->getTargetVertex();
134 }
135
136 btAssert(combinedFace.m_indices.size() > 2);
137
138 btVector3 faceNormal = edges[0].cross(edges[1]);
139 faceNormal.normalize();
140
141 btScalar planeEq = 1e30f;
142
143 for (int v = 0; v < combinedFace.m_indices.size(); v++)
144 {
145 btScalar eq = m_polyhedron->m_vertices[combinedFace.m_indices[v]].dot(faceNormal);
146 if (planeEq > eq)
147 {
148 planeEq = eq;
149 }
150 }
151 combinedFace.m_plane[0] = faceNormal.getX();
152 combinedFace.m_plane[1] = faceNormal.getY();
153 combinedFace.m_plane[2] = faceNormal.getZ();
154 combinedFace.m_plane[3] = -planeEq;
155
156 m_polyhedron->m_faces.push_back(combinedFace);
157 }
158
159#else //BT_RECONSTRUCT_FACES
160
161 btAlignedObjectArray<btVector3> faceNormals;
162 int numFaces = conv.faces.size();
163 faceNormals.resize(numFaces);
164 btConvexHullComputer* convexUtil = &conv;
165
166 btAlignedObjectArray<btFace> tmpFaces;
167 tmpFaces.resize(numFaces);
168
169 int numVertices = convexUtil->vertices.size();
170 m_polyhedron->m_vertices.resize(numVertices);
171 for (int p = 0; p < numVertices; p++)
172 {
173 m_polyhedron->m_vertices[p] = convexUtil->vertices[p];
174 }
175
176 for (int i = 0; i < numFaces; i++)
177 {
178 int face = convexUtil->faces[i];
179 //printf("face=%d\n",face);
180 const btConvexHullComputer::Edge* firstEdge = &convexUtil->edges[face];
181 const btConvexHullComputer::Edge* edge = firstEdge;
182
183 btVector3 edges[3];
184 int numEdges = 0;
185 //compute face normals
186
187 do
188 {
189 int src = edge->getSourceVertex();
190 tmpFaces[i].m_indices.push_back(src);
191 int targ = edge->getTargetVertex();
192 btVector3 wa = convexUtil->vertices[src];
193
194 btVector3 wb = convexUtil->vertices[targ];
195 btVector3 newEdge = wb - wa;
196 newEdge.normalize();
197 if (numEdges < 2)
198 edges[numEdges++] = newEdge;
199
200 edge = edge->getNextEdgeOfFace();
201 } while (edge != firstEdge);
202
203 btScalar planeEq = 1e30f;
204
205 if (numEdges == 2)
206 {
207 faceNormals[i] = edges[0].cross(edges[1]);
208 faceNormals[i].normalize();
209 tmpFaces[i].m_plane[0] = faceNormals[i].getX();
210 tmpFaces[i].m_plane[1] = faceNormals[i].getY();
211 tmpFaces[i].m_plane[2] = faceNormals[i].getZ();
212 tmpFaces[i].m_plane[3] = planeEq;
213 }
214 else
215 {
216 btAssert(0); //degenerate?
217 faceNormals[i].setZero();
218 }
219
220 for (int v = 0; v < tmpFaces[i].m_indices.size(); v++)
221 {
222 btScalar eq = m_polyhedron->m_vertices[tmpFaces[i].m_indices[v]].dot(faceNormals[i]);
223 if (planeEq > eq)
224 {
225 planeEq = eq;
226 }
227 }
228 tmpFaces[i].m_plane[3] = -planeEq;
229 }
230
231 //merge coplanar faces and copy them to m_polyhedron
232
233 btScalar faceWeldThreshold = 0.999f;
234 btAlignedObjectArray<int> todoFaces;
235 for (int i = 0; i < tmpFaces.size(); i++)
236 todoFaces.push_back(i);
237
238 while (todoFaces.size())
239 {
240 btAlignedObjectArray<int> coplanarFaceGroup;
241 int refFace = todoFaces[todoFaces.size() - 1];
242
243 coplanarFaceGroup.push_back(refFace);
244 btFace& faceA = tmpFaces[refFace];
245 todoFaces.pop_back();
246
247 btVector3 faceNormalA(faceA.m_plane[0], faceA.m_plane[1], faceA.m_plane[2]);
248 for (int j = todoFaces.size() - 1; j >= 0; j--)
249 {
250 int i = todoFaces[j];
251 btFace& faceB = tmpFaces[i];
252 btVector3 faceNormalB(faceB.m_plane[0], faceB.m_plane[1], faceB.m_plane[2]);
253 if (faceNormalA.dot(faceNormalB) > faceWeldThreshold)
254 {
255 coplanarFaceGroup.push_back(i);
256 todoFaces.remove(i);
257 }
258 }
259
260 bool did_merge = false;
261 if (coplanarFaceGroup.size() > 1)
262 {
263 //do the merge: use Graham Scan 2d convex hull
264
265 btAlignedObjectArray<GrahamVector3> orgpoints;
266 btVector3 averageFaceNormal(0, 0, 0);
267
268 for (int i = 0; i < coplanarFaceGroup.size(); i++)
269 {
270 // m_polyhedron->m_faces.push_back(tmpFaces[coplanarFaceGroup[i]]);
271
272 btFace& face = tmpFaces[coplanarFaceGroup[i]];
273 btVector3 faceNormal(face.m_plane[0], face.m_plane[1], face.m_plane[2]);
274 averageFaceNormal += faceNormal;
275 for (int f = 0; f < face.m_indices.size(); f++)
276 {
277 int orgIndex = face.m_indices[f];
278 btVector3 pt = m_polyhedron->m_vertices[orgIndex];
279
280 bool found = false;
281
282 for (int i = 0; i < orgpoints.size(); i++)
283 {
284 //if ((orgpoints[i].m_orgIndex == orgIndex) || ((rotatedPt-orgpoints[i]).length2()<0.0001))
285 if (orgpoints[i].m_orgIndex == orgIndex)
286 {
287 found = true;
288 break;
289 }
290 }
291 if (!found)
292 orgpoints.push_back(GrahamVector3(pt, orgIndex));
293 }
294 }
295
296 btFace combinedFace;
297 for (int i = 0; i < 4; i++)
298 combinedFace.m_plane[i] = tmpFaces[coplanarFaceGroup[0]].m_plane[i];
299
300 btAlignedObjectArray<GrahamVector3> hull;
301
302 averageFaceNormal.normalize();
303 GrahamScanConvexHull2D(orgpoints, hull, averageFaceNormal);
304
305 for (int i = 0; i < hull.size(); i++)
306 {
307 combinedFace.m_indices.push_back(hull[i].m_orgIndex);
308 for (int k = 0; k < orgpoints.size(); k++)
309 {
310 if (orgpoints[k].m_orgIndex == hull[i].m_orgIndex)
311 {
312 orgpoints[k].m_orgIndex = -1; // invalidate...
313 break;
314 }
315 }
316 }
317
318 // are there rejected vertices?
319 bool reject_merge = false;
320
321 for (int i = 0; i < orgpoints.size(); i++)
322 {
323 if (orgpoints[i].m_orgIndex == -1)
324 continue; // this is in the hull...
325 // this vertex is rejected -- is anybody else using this vertex?
326 for (int j = 0; j < tmpFaces.size(); j++)
327 {
328 btFace& face = tmpFaces[j];
329 // is this a face of the current coplanar group?
330 bool is_in_current_group = false;
331 for (int k = 0; k < coplanarFaceGroup.size(); k++)
332 {
333 if (coplanarFaceGroup[k] == j)
334 {
335 is_in_current_group = true;
336 break;
337 }
338 }
339 if (is_in_current_group) // ignore this face...
340 continue;
341 // does this face use this rejected vertex?
342 for (int v = 0; v < face.m_indices.size(); v++)
343 {
344 if (face.m_indices[v] == orgpoints[i].m_orgIndex)
345 {
346 // this rejected vertex is used in another face -- reject merge
347 reject_merge = true;
348 break;
349 }
350 }
351 if (reject_merge)
352 break;
353 }
354 if (reject_merge)
355 break;
356 }
357
358 if (!reject_merge)
359 {
360 // do this merge!
361 did_merge = true;
362 m_polyhedron->m_faces.push_back(combinedFace);
363 }
364 }
365 if (!did_merge)
366 {
367 for (int i = 0; i < coplanarFaceGroup.size(); i++)
368 {
369 btFace face = tmpFaces[coplanarFaceGroup[i]];
370 m_polyhedron->m_faces.push_back(face);
371 }
372 }
373 }
374
375#endif //BT_RECONSTRUCT_FACES
376
377 m_polyhedron->initialize();
378
379 return true;
380}
381
382#ifndef MIN
383#define MIN(_a, _b) ((_a) < (_b) ? (_a) : (_b))
384#endif
385
386 btVector3 btPolyhedralConvexShape::localGetSupportingVertexWithoutMargin(const btVector3& vec0) const
387{
388 btVector3 supVec(0, 0, 0);
389#ifndef __SPU__
390 int i;
391 btScalar maxDot(btScalar(-BT_LARGE_FLOAT));
392
393 btVector3 vec = vec0;
394 btScalar lenSqr = vec.length2();
395 if (lenSqr < btScalar(0.0001))
396 {
397 vec.setValue(1, 0, 0);
398 }
399 else
400 {
401 btScalar rlen = btScalar(1.) / btSqrt(lenSqr);
402 vec *= rlen;
403 }
404
405 btVector3 vtx;
406 btScalar newDot;
407
408 for (int k = 0; k < getNumVertices(); k += 128)
409 {
410 btVector3 temp[128];
411 int inner_count = MIN(getNumVertices() - k, 128);
412 for (i = 0; i < inner_count; i++)
413 getVertex(i, temp[i]);
414 i = (int)vec.maxDot(temp, inner_count, newDot);
415 if (newDot > maxDot)
416 {
417 maxDot = newDot;
418 supVec = temp[i];
419 }
420 }
421
422#endif //__SPU__
423 return supVec;
424}
425
426 void btPolyhedralConvexShape::batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors, btVector3* supportVerticesOut, int numVectors) const
427{
428#ifndef __SPU__
429 int i;
430
431 btVector3 vtx;
432 btScalar newDot;
433
434 for (i = 0; i < numVectors; i++)
435 {
436 supportVerticesOut[i][3] = btScalar(-BT_LARGE_FLOAT);
437 }
438
439 for (int j = 0; j < numVectors; j++)
440 {
441 const btVector3& vec = vectors[j];
442
443 for (int k = 0; k < getNumVertices(); k += 128)
444 {
445 btVector3 temp[128];
446 int inner_count = MIN(getNumVertices() - k, 128);
447 for (i = 0; i < inner_count; i++)
448 getVertex(i, temp[i]);
449 i = (int)vec.maxDot(temp, inner_count, newDot);
450 if (newDot > supportVerticesOut[j][3])
451 {
452 supportVerticesOut[j] = temp[i];
453 supportVerticesOut[j][3] = newDot;
454 }
455 }
456 }
457
458#endif //__SPU__
459}
460
461 void btPolyhedralConvexShape::calculateLocalInertia(btScalar mass, btVector3& inertia) const
462{
463#ifndef __SPU__
464 //not yet, return box inertia
465
466 btScalar margin = getMargin();
467
468 btTransform ident;
469 ident.setIdentity();
470 btVector3 aabbMin, aabbMax;
471 getAabb(ident, aabbMin, aabbMax);
472 btVector3 halfExtents = (aabbMax - aabbMin) * btScalar(0.5);
473
474 btScalar lx = btScalar(2.) * (halfExtents.x() + margin);
475 btScalar ly = btScalar(2.) * (halfExtents.y() + margin);
476 btScalar lz = btScalar(2.) * (halfExtents.z() + margin);
477 const btScalar x2 = lx * lx;
478 const btScalar y2 = ly * ly;
479 const btScalar z2 = lz * lz;
480 const btScalar scaledmass = mass * btScalar(0.08333333);
481
482 inertia = scaledmass * (btVector3(y2 + z2, x2 + z2, x2 + y2));
483#endif //__SPU__
484}
485
486 void btPolyhedralConvexAabbCachingShape::setLocalScaling(const btVector3& scaling)
487{
488 btConvexInternalShape::setLocalScaling(scaling);
489 recalcLocalAabb();
490}
491
492btPolyhedralConvexAabbCachingShape::btPolyhedralConvexAabbCachingShape()
493 : btPolyhedralConvexShape(),
494 m_localAabbMin(1, 1, 1),
495 m_localAabbMax(-1, -1, -1),
496 m_isLocalAabbValid(false)
497{
498}
499
500 void btPolyhedralConvexAabbCachingShape::getAabb(const btTransform& trans, btVector3& aabbMin, btVector3& aabbMax) const
501{
502 getNonvirtualAabb(trans, aabbMin, aabbMax, getMargin());
503}
504
505 void btPolyhedralConvexAabbCachingShape::recalcLocalAabb()
506{
507 m_isLocalAabbValid = true;
508
509#if 1
510 static const btVector3 _directions[] =
511 {
512 btVector3(1., 0., 0.),
513 btVector3(0., 1., 0.),
514 btVector3(0., 0., 1.),
515 btVector3(-1., 0., 0.),
516 btVector3(0., -1., 0.),
517 btVector3(0., 0., -1.)};
518
519 btVector3 _supporting[] =
520 {
521 btVector3(0., 0., 0.),
522 btVector3(0., 0., 0.),
523 btVector3(0., 0., 0.),
524 btVector3(0., 0., 0.),
525 btVector3(0., 0., 0.),
526 btVector3(0., 0., 0.)};
527
528 batchedUnitVectorGetSupportingVertexWithoutMargin(_directions, _supporting, 6);
529
530 for (int i = 0; i < 3; ++i)
531 {
532 m_localAabbMax[i] = _supporting[i][i] + m_collisionMargin;
533 m_localAabbMin[i] = _supporting[i + 3][i] - m_collisionMargin;
534 }
535
536#else
537
538 for (int i = 0; i < 3; i++)
539 {
540 btVector3 vec(btScalar(0.), btScalar(0.), btScalar(0.));
541 vec[i] = btScalar(1.);
542 btVector3 tmp = localGetSupportingVertex(vec);
543 m_localAabbMax[i] = tmp[i];
544 vec[i] = btScalar(-1.);
545 tmp = localGetSupportingVertex(vec);
546 m_localAabbMin[i] = tmp[i];
547 }
548#endif
549}
btAlignedFree
#define btAlignedFree(ptr)
Definition btAlignedAllocator.h:47
btAlignedAlloc
#define btAlignedAlloc(size, alignment)
Definition btAlignedAllocator.h:46
btConvexHullComputer.h
btConvexPolyhedron.h
btGeometryUtil.h
btGrahamScan2dConvexHull.h
GrahamScanConvexHull2D
void GrahamScanConvexHull2D(btAlignedObjectArray< GrahamVector3 > &originalPoints, btAlignedObjectArray< GrahamVector3 > &hull, const btVector3 &normalAxis)
Definition btGrahamScan2dConvexHull.h:58
MIN
#define MIN(_a, _b)
Definition btMultiSphereShape.cpp:43
btPolyhedralConvexShape.h
btScalar
float btScalar
The btScalar type abstracts floating point numbers, to easily switch between double and single floati...
Definition btScalar.h:314
BT_LARGE_FLOAT
#define BT_LARGE_FLOAT
Definition btScalar.h:316
btSqrt
btScalar btSqrt(btScalar y)
Definition btScalar.h:466
btAssert
#define btAssert(x)
Definition btScalar.h:153
btAlignedObjectArray
The btAlignedObjectArray template class uses a subset of the stl::vector interface for its methods It...
Definition btAlignedObjectArray.h:46
btAlignedObjectArray::size
int size() const
return the number of elements in the array
Definition btAlignedObjectArray.h:142
btAlignedObjectArray::resize
void resize(int newsize, const T &fillData=T())
Definition btAlignedObjectArray.h:203
btAlignedObjectArray::remove
void remove(const T &key)
Definition btAlignedObjectArray.h:480
btAlignedObjectArray::expand
T & expand(const T &fillValue=T())
Definition btAlignedObjectArray.h:242
btAlignedObjectArray::push_back
void push_back(const T &_Val)
Definition btAlignedObjectArray.h:257
btAlignedObjectArray::pop_back
void pop_back()
Definition btAlignedObjectArray.h:185
btConvexHullComputer::Edge
Definition btConvexHullComputer.h:31
btConvexHullComputer::Edge::getNextEdgeOfFace
const Edge * getNextEdgeOfFace() const
Definition btConvexHullComputer.h:55
btConvexHullComputer::Edge::getSourceVertex
int getSourceVertex() const
Definition btConvexHullComputer.h:40
btConvexHullComputer::Edge::getTargetVertex
int getTargetVertex() const
Definition btConvexHullComputer.h:45
btConvexHullComputer
Convex hull implementation based on Preparata and Hong See http://code.google.com/p/bullet/issues/det...
Definition btConvexHullComputer.h:25
btConvexHullComputer::compute
btScalar compute(const void *coords, bool doubleCoords, int stride, int count, btScalar shrink, btScalar shrinkClamp)
Definition btConvexHullComputer.cpp:2653
btConvexHullComputer::vertices
btAlignedObjectArray< btVector3 > vertices
Definition btConvexHullComputer.h:67
btConvexHullComputer::faces
btAlignedObjectArray< int > faces
Definition btConvexHullComputer.h:76
btConvexHullComputer::edges
btAlignedObjectArray< Edge > edges
Definition btConvexHullComputer.h:73
btConvexInternalShape::m_collisionMargin
btScalar m_collisionMargin
Definition btConvexInternalShape.h:37
btConvexInternalShape::localGetSupportingVertex
virtual btVector3 localGetSupportingVertex(const btVector3 &vec) const
Definition btConvexInternalShape.cpp:50
btConvexInternalShape::getAabb
void getAabb(const btTransform &t, btVector3 &aabbMin, btVector3 &aabbMax) const
getAabb's default implementation is brute force, expected derived classes to implement a fast dedicat...
Definition btConvexInternalShape.h:84
btConvexInternalShape::btConvexInternalShape
btConvexInternalShape()
Definition btConvexInternalShape.cpp:18
btConvexInternalShape::setLocalScaling
virtual void setLocalScaling(const btVector3 &scaling)
Definition btConvexInternalShape.cpp:24
btConvexInternalShape::getMargin
virtual btScalar getMargin() const
Definition btConvexInternalShape.h:106
btConvexPolyhedron
Definition btConvexPolyhedron.h:35
btGeometryUtil::getVerticesFromPlaneEquations
static void getVerticesFromPlaneEquations(const btAlignedObjectArray< btVector3 > &planeEquations, btAlignedObjectArray< btVector3 > &verticesOut)
Definition btGeometryUtil.cpp:119
btGeometryUtil::getPlaneEquationsFromVertices
static void getPlaneEquationsFromVertices(btAlignedObjectArray< btVector3 > &vertices, btAlignedObjectArray< btVector3 > &planeEquationsOut)
Definition btGeometryUtil.cpp:75
btPolyhedralConvexAabbCachingShape::recalcLocalAabb
void recalcLocalAabb()
Definition btPolyhedralConvexShape.cpp:505
btPolyhedralConvexAabbCachingShape::btPolyhedralConvexAabbCachingShape
btPolyhedralConvexAabbCachingShape()
Definition btPolyhedralConvexShape.cpp:492
btPolyhedralConvexAabbCachingShape::setLocalScaling
virtual void setLocalScaling(const btVector3 &scaling)
Definition btPolyhedralConvexShape.cpp:486
btPolyhedralConvexAabbCachingShape::getAabb
virtual void getAabb(const btTransform &t, btVector3 &aabbMin, btVector3 &aabbMax) const
getAabb's default implementation is brute force, expected derived classes to implement a fast dedicat...
Definition btPolyhedralConvexShape.cpp:500
btPolyhedralConvexAabbCachingShape::m_isLocalAabbValid
bool m_isLocalAabbValid
Definition btPolyhedralConvexShape.h:71
btPolyhedralConvexAabbCachingShape::m_localAabbMax
btVector3 m_localAabbMax
Definition btPolyhedralConvexShape.h:70
btPolyhedralConvexAabbCachingShape::m_localAabbMin
btVector3 m_localAabbMin
Definition btPolyhedralConvexShape.h:69
btPolyhedralConvexAabbCachingShape::getNonvirtualAabb
void getNonvirtualAabb(const btTransform &trans, btVector3 &aabbMin, btVector3 &aabbMax, btScalar margin) const
Definition btPolyhedralConvexShape.h:92
btPolyhedralConvexShape::btPolyhedralConvexShape
btPolyhedralConvexShape()
Definition btPolyhedralConvexShape.cpp:26
btPolyhedralConvexShape::localGetSupportingVertexWithoutMargin
virtual btVector3 localGetSupportingVertexWithoutMargin(const btVector3 &vec) const
Definition btPolyhedralConvexShape.cpp:386
btPolyhedralConvexShape::~btPolyhedralConvexShape
virtual ~btPolyhedralConvexShape()
Definition btPolyhedralConvexShape.cpp:31
btPolyhedralConvexShape::initializePolyhedralFeatures
virtual bool initializePolyhedralFeatures(int shiftVerticesByMargin=0)
optional method mainly used to generate multiple contact points by clipping polyhedral features (face...
Definition btPolyhedralConvexShape.cpp:53
btPolyhedralConvexShape::batchedUnitVectorGetSupportingVertexWithoutMargin
virtual void batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3 *vectors, btVector3 *supportVerticesOut, int numVectors) const
Definition btPolyhedralConvexShape.cpp:426
btPolyhedralConvexShape::getVertex
virtual void getVertex(int i, btVector3 &vtx) const =0
btPolyhedralConvexShape::setPolyhedralFeatures
virtual void setPolyhedralFeatures(btConvexPolyhedron &polyhedron)
Definition btPolyhedralConvexShape.cpp:40
btPolyhedralConvexShape::m_polyhedron
btConvexPolyhedron * m_polyhedron
Definition btPolyhedralConvexShape.h:28
btPolyhedralConvexShape::getNumVertices
virtual int getNumVertices() const =0
btPolyhedralConvexShape::calculateLocalInertia
virtual void calculateLocalInertia(btScalar mass, btVector3 &inertia) const
Definition btPolyhedralConvexShape.cpp:461
btTransform
The btTransform class supports rigid transforms with only translation and rotation and no scaling/she...
Definition btTransform.h:30
btTransform::setIdentity
void setIdentity()
Set this transformation to the identity.
Definition btTransform.h:167
btVector3
btVector3 can be used to represent 3D points and vectors.
Definition btVector3.h:82
btVector3::getZ
const btScalar & getZ() const
Return the z value.
Definition btVector3.h:565
btVector3::z
const btScalar & z() const
Return the z value.
Definition btVector3.h:579
btVector3::cross
btVector3 cross(const btVector3 &v) const
Return the cross product between this and another vector.
Definition btVector3.h:380
btVector3::dot
btScalar dot(const btVector3 &v) const
Return the dot product.
Definition btVector3.h:229
btVector3::setValue
void setValue(const btScalar &_x, const btScalar &_y, const btScalar &_z)
Definition btVector3.h:640
btVector3::maxDot
long maxDot(const btVector3 *array, long array_count, btScalar &dotOut) const
returns index of maximum dot product between this and vectors in array[]
Definition btVector3.h:998
btVector3::length2
btScalar length2() const
Return the length of the vector squared.
Definition btVector3.h:251
btVector3::getY
const btScalar & getY() const
Return the y value.
Definition btVector3.h:563
btVector3::x
const btScalar & x() const
Return the x value.
Definition btVector3.h:575
btVector3::normalize
btVector3 & normalize()
Normalize this vector x^2 + y^2 + z^2 = 1.
Definition btVector3.h:303
btVector3::getX
const btScalar & getX() const
Return the x value.
Definition btVector3.h:561
btVector3::y
const btScalar & y() const
Return the y value.
Definition btVector3.h:577
GrahamVector3
Definition btGrahamScan2dConvexHull.h:23
btFace
Definition btConvexPolyhedron.h:27
btFace::m_indices
btAlignedObjectArray< int > m_indices
Definition btConvexPolyhedron.h:28
btFace::m_plane
btScalar m_plane[4]
Definition btConvexPolyhedron.h:30