diff options
author | Erwin Coumans <blender@erwincoumans.com> | 2007-06-23 09:28:07 +0400 |
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committer | Erwin Coumans <blender@erwincoumans.com> | 2007-06-23 09:28:07 +0400 |
commit | ca26aeb7b23e37e65f49d907ea53fcaeee77ad4e (patch) | |
tree | b6530195a8ef5d874b9fc2bbb9574f1484781be5 /extern/bullet2/src/BulletCollision/CollisionShapes/btCapsuleShape.cpp | |
parent | 14ad8c9941ac1e6f5252a843c6ad17653cbbd689 (diff) |
upgrade to latest Bullet 2.53. cross the fingers it doesn't break one of the exotic or less exotic platforms
Diffstat (limited to 'extern/bullet2/src/BulletCollision/CollisionShapes/btCapsuleShape.cpp')
-rw-r--r-- | extern/bullet2/src/BulletCollision/CollisionShapes/btCapsuleShape.cpp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/extern/bullet2/src/BulletCollision/CollisionShapes/btCapsuleShape.cpp b/extern/bullet2/src/BulletCollision/CollisionShapes/btCapsuleShape.cpp new file mode 100644 index 00000000000..b7e15172da2 --- /dev/null +++ b/extern/bullet2/src/BulletCollision/CollisionShapes/btCapsuleShape.cpp @@ -0,0 +1,146 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/ + +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. +*/ + + +#include "btCapsuleShape.h" + +#include "BulletCollision/CollisionShapes/btCollisionMargin.h" +#include "LinearMath/btQuaternion.h" + +btCapsuleShape::btCapsuleShape(btScalar radius, btScalar height) +{ + m_implicitShapeDimensions.setValue(radius,0.5f*height,radius); +} + + + btVector3 btCapsuleShape::localGetSupportingVertexWithoutMargin(const btVector3& vec0)const +{ + + btVector3 supVec(0,0,0); + + btScalar maxDot(btScalar(-1e30)); + + 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; + + btScalar radius = getRadius(); + + + { + btVector3 pos(0,getHalfHeight(),0); + vtx = pos +vec*m_localScaling*(radius) - vec * getMargin(); + newDot = vec.dot(vtx); + if (newDot > maxDot) + { + maxDot = newDot; + supVec = vtx; + } + } + { + btVector3 pos(0,-getHalfHeight(),0); + vtx = pos +vec*m_localScaling*(radius) - vec * getMargin(); + newDot = vec.dot(vtx); + if (newDot > maxDot) + { + maxDot = newDot; + supVec = vtx; + } + } + + return supVec; + +} + + void btCapsuleShape::batchedUnitVectorGetSupportingVertexWithoutMargin(const btVector3* vectors,btVector3* supportVerticesOut,int numVectors) const +{ + + + btScalar radius = getRadius(); + + for (int j=0;j<numVectors;j++) + { + btScalar maxDot(btScalar(-1e30)); + const btVector3& vec = vectors[j]; + + btVector3 vtx; + btScalar newDot; + { + btVector3 pos(0,getHalfHeight(),0); + vtx = pos +vec*m_localScaling*(radius) - vec * getMargin(); + newDot = vec.dot(vtx); + if (newDot > maxDot) + { + maxDot = newDot; + supportVerticesOut[j] = vtx; + } + } + { + btVector3 pos(0,-getHalfHeight(),0); + vtx = pos +vec*m_localScaling*(radius) - vec * getMargin(); + newDot = vec.dot(vtx); + if (newDot > maxDot) + { + maxDot = newDot; + supportVerticesOut[j] = vtx; + } + } + + } +} + + +void btCapsuleShape::calculateLocalInertia(btScalar mass,btVector3& inertia) +{ + //as an approximation, take the inertia of the box that bounds the spheres + + btTransform ident; + ident.setIdentity(); + + + btScalar radius = getRadius(); + + btVector3 halfExtents(radius,radius+getHalfHeight(),radius); + + btScalar margin = CONVEX_DISTANCE_MARGIN; + + btScalar lx=btScalar(2.)*(halfExtents[0]+margin); + btScalar ly=btScalar(2.)*(halfExtents[1]+margin); + btScalar lz=btScalar(2.)*(halfExtents[2]+margin); + const btScalar x2 = lx*lx; + const btScalar y2 = ly*ly; + const btScalar z2 = lz*lz; + const btScalar scaledmass = mass * btScalar(.08333333); + + inertia[0] = scaledmass * (y2+z2); + inertia[1] = scaledmass * (x2+z2); + inertia[2] = scaledmass * (x2+y2); + +} + + + + + |