[7983] | 1 | /* |
---|
| 2 | Bullet Continuous Collision Detection and Physics Library |
---|
| 3 | Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ |
---|
| 4 | |
---|
| 5 | This software is provided 'as-is', without any express or implied warranty. |
---|
| 6 | In no event will the authors be held liable for any damages arising from the use of this software. |
---|
| 7 | Permission is granted to anyone to use this software for any purpose, |
---|
| 8 | including commercial applications, and to alter it and redistribute it freely, |
---|
| 9 | subject to the following restrictions: |
---|
| 10 | |
---|
| 11 | 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. |
---|
| 12 | 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. |
---|
| 13 | 3. This notice may not be removed or altered from any source distribution. |
---|
| 14 | */ |
---|
| 15 | |
---|
| 16 | #ifndef OBB_BOX_2D_SHAPE_H |
---|
| 17 | #define OBB_BOX_2D_SHAPE_H |
---|
| 18 | |
---|
| 19 | #include "BulletCollision/CollisionShapes/btPolyhedralConvexShape.h" |
---|
| 20 | #include "BulletCollision/CollisionShapes/btCollisionMargin.h" |
---|
| 21 | #include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" |
---|
| 22 | #include "LinearMath/btVector3.h" |
---|
| 23 | #include "LinearMath/btMinMax.h" |
---|
| 24 | |
---|
| 25 | ///The btBox2dShape is a box primitive around the origin, its sides axis aligned with length specified by half extents, in local shape coordinates. When used as part of a btCollisionObject or btRigidBody it will be an oriented box in world space. |
---|
| 26 | class btBox2dShape: public btPolyhedralConvexShape |
---|
| 27 | { |
---|
| 28 | |
---|
| 29 | //btVector3 m_boxHalfExtents1; //use m_implicitShapeDimensions instead |
---|
| 30 | |
---|
| 31 | btVector3 m_centroid; |
---|
| 32 | btVector3 m_vertices[4]; |
---|
| 33 | btVector3 m_normals[4]; |
---|
| 34 | |
---|
| 35 | public: |
---|
| 36 | |
---|
| 37 | btVector3 getHalfExtentsWithMargin() const |
---|
| 38 | { |
---|
| 39 | btVector3 halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 40 | btVector3 margin(getMargin(),getMargin(),getMargin()); |
---|
| 41 | halfExtents += margin; |
---|
| 42 | return halfExtents; |
---|
| 43 | } |
---|
| 44 | |
---|
| 45 | const btVector3& getHalfExtentsWithoutMargin() const |
---|
| 46 | { |
---|
| 47 | return m_implicitShapeDimensions;//changed in Bullet 2.63: assume the scaling and margin are included |
---|
| 48 | } |
---|
| 49 | |
---|
| 50 | |
---|
| 51 | virtual btVector3 localGetSupportingVertex(const btVector3& vec) const |
---|
| 52 | { |
---|
| 53 | btVector3 halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 54 | btVector3 margin(getMargin(),getMargin(),getMargin()); |
---|
| 55 | halfExtents += margin; |
---|
| 56 | |
---|
| 57 | return btVector3(btFsels(vec.x(), halfExtents.x(), -halfExtents.x()), |
---|
| 58 | btFsels(vec.y(), halfExtents.y(), -halfExtents.y()), |
---|
| 59 | btFsels(vec.z(), halfExtents.z(), -halfExtents.z())); |
---|
| 60 | } |
---|
| 61 | |
---|
| 62 | SIMD_FORCE_INLINE btVector3 localGetSupportingVertexWithoutMargin(const btVector3& vec)const |
---|
| 63 | { |
---|
| 64 | const btVector3& halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 65 | |
---|
| 66 | return btVector3(btFsels(vec.x(), halfExtents.x(), -halfExtents.x()), |
---|
| 67 | btFsels(vec.y(), halfExtents.y(), -halfExtents.y()), |
---|
| 68 | btFsels(vec.z(), halfExtents.z(), -halfExtents.z())); |
---|
| 69 | } |
---|
| 70 | |
---|
| 71 | virtual void batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const |
---|
| 72 | { |
---|
| 73 | const btVector3& halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 74 | |
---|
| 75 | for (int i=0;i<numVectors;i++) |
---|
| 76 | { |
---|
| 77 | const btVector3& vec = vectors[i]; |
---|
| 78 | supportVerticesOut[i].setValue(btFsels(vec.x(), halfExtents.x(), -halfExtents.x()), |
---|
| 79 | btFsels(vec.y(), halfExtents.y(), -halfExtents.y()), |
---|
| 80 | btFsels(vec.z(), halfExtents.z(), -halfExtents.z())); |
---|
| 81 | } |
---|
| 82 | |
---|
| 83 | } |
---|
| 84 | |
---|
| 85 | |
---|
| 86 | btBox2dShape( const btVector3& boxHalfExtents) |
---|
| 87 | : btPolyhedralConvexShape(), |
---|
| 88 | m_centroid(0,0,0) |
---|
| 89 | { |
---|
| 90 | m_vertices[0].setValue(-boxHalfExtents.getX(),-boxHalfExtents.getY(),0); |
---|
| 91 | m_vertices[1].setValue(boxHalfExtents.getX(),-boxHalfExtents.getY(),0); |
---|
| 92 | m_vertices[2].setValue(boxHalfExtents.getX(),boxHalfExtents.getY(),0); |
---|
| 93 | m_vertices[3].setValue(-boxHalfExtents.getX(),boxHalfExtents.getY(),0); |
---|
| 94 | |
---|
| 95 | m_normals[0].setValue(0,-1,0); |
---|
| 96 | m_normals[1].setValue(1,0,0); |
---|
| 97 | m_normals[2].setValue(0,1,0); |
---|
| 98 | m_normals[3].setValue(-1,0,0); |
---|
| 99 | |
---|
| 100 | m_shapeType = BOX_2D_SHAPE_PROXYTYPE; |
---|
| 101 | btVector3 margin(getMargin(),getMargin(),getMargin()); |
---|
| 102 | m_implicitShapeDimensions = (boxHalfExtents * m_localScaling) - margin; |
---|
| 103 | }; |
---|
| 104 | |
---|
| 105 | virtual void setMargin(btScalar collisionMargin) |
---|
| 106 | { |
---|
| 107 | //correct the m_implicitShapeDimensions for the margin |
---|
| 108 | btVector3 oldMargin(getMargin(),getMargin(),getMargin()); |
---|
| 109 | btVector3 implicitShapeDimensionsWithMargin = m_implicitShapeDimensions+oldMargin; |
---|
| 110 | |
---|
| 111 | btConvexInternalShape::setMargin(collisionMargin); |
---|
| 112 | btVector3 newMargin(getMargin(),getMargin(),getMargin()); |
---|
| 113 | m_implicitShapeDimensions = implicitShapeDimensionsWithMargin - newMargin; |
---|
| 114 | |
---|
| 115 | } |
---|
| 116 | virtual void setLocalScaling(const btVector3& scaling) |
---|
| 117 | { |
---|
| 118 | btVector3 oldMargin(getMargin(),getMargin(),getMargin()); |
---|
| 119 | btVector3 implicitShapeDimensionsWithMargin = m_implicitShapeDimensions+oldMargin; |
---|
| 120 | btVector3 unScaledImplicitShapeDimensionsWithMargin = implicitShapeDimensionsWithMargin / m_localScaling; |
---|
| 121 | |
---|
| 122 | btConvexInternalShape::setLocalScaling(scaling); |
---|
| 123 | |
---|
| 124 | m_implicitShapeDimensions = (unScaledImplicitShapeDimensionsWithMargin * m_localScaling) - oldMargin; |
---|
| 125 | |
---|
| 126 | } |
---|
| 127 | |
---|
| 128 | virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const; |
---|
| 129 | |
---|
| 130 | |
---|
| 131 | |
---|
| 132 | virtual void calculateLocalInertia(btScalar mass,btVector3& inertia) const; |
---|
| 133 | |
---|
| 134 | |
---|
| 135 | |
---|
| 136 | |
---|
| 137 | |
---|
| 138 | int getVertexCount() const |
---|
| 139 | { |
---|
| 140 | return 4; |
---|
| 141 | } |
---|
| 142 | |
---|
| 143 | virtual int getNumVertices()const |
---|
| 144 | { |
---|
| 145 | return 4; |
---|
| 146 | } |
---|
| 147 | |
---|
| 148 | const btVector3* getVertices() const |
---|
| 149 | { |
---|
| 150 | return &m_vertices[0]; |
---|
| 151 | } |
---|
| 152 | |
---|
| 153 | const btVector3* getNormals() const |
---|
| 154 | { |
---|
| 155 | return &m_normals[0]; |
---|
| 156 | } |
---|
| 157 | |
---|
| 158 | |
---|
| 159 | |
---|
| 160 | |
---|
| 161 | |
---|
| 162 | |
---|
| 163 | |
---|
| 164 | virtual void getPlane(btVector3& planeNormal,btVector3& planeSupport,int i ) const |
---|
| 165 | { |
---|
| 166 | //this plane might not be aligned... |
---|
| 167 | btVector4 plane ; |
---|
| 168 | getPlaneEquation(plane,i); |
---|
| 169 | planeNormal = btVector3(plane.getX(),plane.getY(),plane.getZ()); |
---|
| 170 | planeSupport = localGetSupportingVertex(-planeNormal); |
---|
| 171 | } |
---|
| 172 | |
---|
| 173 | |
---|
| 174 | const btVector3& getCentroid() const |
---|
| 175 | { |
---|
| 176 | return m_centroid; |
---|
| 177 | } |
---|
| 178 | |
---|
| 179 | virtual int getNumPlanes() const |
---|
| 180 | { |
---|
| 181 | return 6; |
---|
| 182 | } |
---|
| 183 | |
---|
| 184 | |
---|
| 185 | |
---|
| 186 | virtual int getNumEdges() const |
---|
| 187 | { |
---|
| 188 | return 12; |
---|
| 189 | } |
---|
| 190 | |
---|
| 191 | |
---|
| 192 | virtual void getVertex(int i,btVector3& vtx) const |
---|
| 193 | { |
---|
| 194 | btVector3 halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 195 | |
---|
| 196 | vtx = btVector3( |
---|
| 197 | halfExtents.x() * (1-(i&1)) - halfExtents.x() * (i&1), |
---|
| 198 | halfExtents.y() * (1-((i&2)>>1)) - halfExtents.y() * ((i&2)>>1), |
---|
| 199 | halfExtents.z() * (1-((i&4)>>2)) - halfExtents.z() * ((i&4)>>2)); |
---|
| 200 | } |
---|
| 201 | |
---|
| 202 | |
---|
| 203 | virtual void getPlaneEquation(btVector4& plane,int i) const |
---|
| 204 | { |
---|
| 205 | btVector3 halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 206 | |
---|
| 207 | switch (i) |
---|
| 208 | { |
---|
| 209 | case 0: |
---|
| 210 | plane.setValue(btScalar(1.),btScalar(0.),btScalar(0.),-halfExtents.x()); |
---|
| 211 | break; |
---|
| 212 | case 1: |
---|
| 213 | plane.setValue(btScalar(-1.),btScalar(0.),btScalar(0.),-halfExtents.x()); |
---|
| 214 | break; |
---|
| 215 | case 2: |
---|
| 216 | plane.setValue(btScalar(0.),btScalar(1.),btScalar(0.),-halfExtents.y()); |
---|
| 217 | break; |
---|
| 218 | case 3: |
---|
| 219 | plane.setValue(btScalar(0.),btScalar(-1.),btScalar(0.),-halfExtents.y()); |
---|
| 220 | break; |
---|
| 221 | case 4: |
---|
| 222 | plane.setValue(btScalar(0.),btScalar(0.),btScalar(1.),-halfExtents.z()); |
---|
| 223 | break; |
---|
| 224 | case 5: |
---|
| 225 | plane.setValue(btScalar(0.),btScalar(0.),btScalar(-1.),-halfExtents.z()); |
---|
| 226 | break; |
---|
| 227 | default: |
---|
| 228 | btAssert(0); |
---|
| 229 | } |
---|
| 230 | } |
---|
| 231 | |
---|
| 232 | |
---|
| 233 | virtual void getEdge(int i,btVector3& pa,btVector3& pb) const |
---|
| 234 | //virtual void getEdge(int i,Edge& edge) const |
---|
| 235 | { |
---|
| 236 | int edgeVert0 = 0; |
---|
| 237 | int edgeVert1 = 0; |
---|
| 238 | |
---|
| 239 | switch (i) |
---|
| 240 | { |
---|
| 241 | case 0: |
---|
| 242 | edgeVert0 = 0; |
---|
| 243 | edgeVert1 = 1; |
---|
| 244 | break; |
---|
| 245 | case 1: |
---|
| 246 | edgeVert0 = 0; |
---|
| 247 | edgeVert1 = 2; |
---|
| 248 | break; |
---|
| 249 | case 2: |
---|
| 250 | edgeVert0 = 1; |
---|
| 251 | edgeVert1 = 3; |
---|
| 252 | |
---|
| 253 | break; |
---|
| 254 | case 3: |
---|
| 255 | edgeVert0 = 2; |
---|
| 256 | edgeVert1 = 3; |
---|
| 257 | break; |
---|
| 258 | case 4: |
---|
| 259 | edgeVert0 = 0; |
---|
| 260 | edgeVert1 = 4; |
---|
| 261 | break; |
---|
| 262 | case 5: |
---|
| 263 | edgeVert0 = 1; |
---|
| 264 | edgeVert1 = 5; |
---|
| 265 | |
---|
| 266 | break; |
---|
| 267 | case 6: |
---|
| 268 | edgeVert0 = 2; |
---|
| 269 | edgeVert1 = 6; |
---|
| 270 | break; |
---|
| 271 | case 7: |
---|
| 272 | edgeVert0 = 3; |
---|
| 273 | edgeVert1 = 7; |
---|
| 274 | break; |
---|
| 275 | case 8: |
---|
| 276 | edgeVert0 = 4; |
---|
| 277 | edgeVert1 = 5; |
---|
| 278 | break; |
---|
| 279 | case 9: |
---|
| 280 | edgeVert0 = 4; |
---|
| 281 | edgeVert1 = 6; |
---|
| 282 | break; |
---|
| 283 | case 10: |
---|
| 284 | edgeVert0 = 5; |
---|
| 285 | edgeVert1 = 7; |
---|
| 286 | break; |
---|
| 287 | case 11: |
---|
| 288 | edgeVert0 = 6; |
---|
| 289 | edgeVert1 = 7; |
---|
| 290 | break; |
---|
| 291 | default: |
---|
| 292 | btAssert(0); |
---|
| 293 | |
---|
| 294 | } |
---|
| 295 | |
---|
| 296 | getVertex(edgeVert0,pa ); |
---|
| 297 | getVertex(edgeVert1,pb ); |
---|
| 298 | } |
---|
| 299 | |
---|
| 300 | |
---|
| 301 | |
---|
| 302 | |
---|
| 303 | |
---|
| 304 | virtual bool isInside(const btVector3& pt,btScalar tolerance) const |
---|
| 305 | { |
---|
| 306 | btVector3 halfExtents = getHalfExtentsWithoutMargin(); |
---|
| 307 | |
---|
| 308 | //btScalar minDist = 2*tolerance; |
---|
| 309 | |
---|
| 310 | bool result = (pt.x() <= (halfExtents.x()+tolerance)) && |
---|
| 311 | (pt.x() >= (-halfExtents.x()-tolerance)) && |
---|
| 312 | (pt.y() <= (halfExtents.y()+tolerance)) && |
---|
| 313 | (pt.y() >= (-halfExtents.y()-tolerance)) && |
---|
| 314 | (pt.z() <= (halfExtents.z()+tolerance)) && |
---|
| 315 | (pt.z() >= (-halfExtents.z()-tolerance)); |
---|
| 316 | |
---|
| 317 | return result; |
---|
| 318 | } |
---|
| 319 | |
---|
| 320 | |
---|
| 321 | //debugging |
---|
| 322 | virtual const char* getName()const |
---|
| 323 | { |
---|
| 324 | return "Box2d"; |
---|
| 325 | } |
---|
| 326 | |
---|
| 327 | virtual int getNumPreferredPenetrationDirections() const |
---|
| 328 | { |
---|
| 329 | return 6; |
---|
| 330 | } |
---|
| 331 | |
---|
| 332 | virtual void getPreferredPenetrationDirection(int index, btVector3& penetrationVector) const |
---|
| 333 | { |
---|
| 334 | switch (index) |
---|
| 335 | { |
---|
| 336 | case 0: |
---|
| 337 | penetrationVector.setValue(btScalar(1.),btScalar(0.),btScalar(0.)); |
---|
| 338 | break; |
---|
| 339 | case 1: |
---|
| 340 | penetrationVector.setValue(btScalar(-1.),btScalar(0.),btScalar(0.)); |
---|
| 341 | break; |
---|
| 342 | case 2: |
---|
| 343 | penetrationVector.setValue(btScalar(0.),btScalar(1.),btScalar(0.)); |
---|
| 344 | break; |
---|
| 345 | case 3: |
---|
| 346 | penetrationVector.setValue(btScalar(0.),btScalar(-1.),btScalar(0.)); |
---|
| 347 | break; |
---|
| 348 | case 4: |
---|
| 349 | penetrationVector.setValue(btScalar(0.),btScalar(0.),btScalar(1.)); |
---|
| 350 | break; |
---|
| 351 | case 5: |
---|
| 352 | penetrationVector.setValue(btScalar(0.),btScalar(0.),btScalar(-1.)); |
---|
| 353 | break; |
---|
| 354 | default: |
---|
| 355 | btAssert(0); |
---|
| 356 | } |
---|
| 357 | } |
---|
| 358 | |
---|
| 359 | }; |
---|
| 360 | |
---|
| 361 | #endif //OBB_BOX_2D_SHAPE_H |
---|
| 362 | |
---|
| 363 | |
---|