diff options
Diffstat (limited to 'extern/bullet2/src/BulletCollision/CollisionShapes/btCollisionShape.cpp')
-rw-r--r-- | extern/bullet2/src/BulletCollision/CollisionShapes/btCollisionShape.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/extern/bullet2/src/BulletCollision/CollisionShapes/btCollisionShape.cpp b/extern/bullet2/src/BulletCollision/CollisionShapes/btCollisionShape.cpp new file mode 100644 index 00000000000..5474a201c37 --- /dev/null +++ b/extern/bullet2/src/BulletCollision/CollisionShapes/btCollisionShape.cpp @@ -0,0 +1,75 @@ +/* +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 "BulletCollision/CollisionShapes/btCollisionShape.h" + +void btCollisionShape::getBoundingSphere(btVector3& center,btScalar& radius) const +{ + btTransform tr; + tr.setIdentity(); + btVector3 aabbMin,aabbMax; + + getAabb(tr,aabbMin,aabbMax); + + radius = (aabbMax-aabbMin).length()*0.5f; + center = (aabbMin+aabbMax)*0.5f; +} + +float btCollisionShape::getAngularMotionDisc() const +{ + btVector3 center; + float disc; + getBoundingSphere(center,disc); + disc += (center).length(); + return disc; +} + +void btCollisionShape::calculateTemporalAabb(const btTransform& curTrans,const btVector3& linvel,const btVector3& angvel,btScalar timeStep, btVector3& temporalAabbMin,btVector3& temporalAabbMax) +{ + //start with static aabb + getAabb(curTrans,temporalAabbMin,temporalAabbMax); + + float temporalAabbMaxx = temporalAabbMax.getX(); + float temporalAabbMaxy = temporalAabbMax.getY(); + float temporalAabbMaxz = temporalAabbMax.getZ(); + float temporalAabbMinx = temporalAabbMin.getX(); + float temporalAabbMiny = temporalAabbMin.getY(); + float temporalAabbMinz = temporalAabbMin.getZ(); + + // add linear motion + btVector3 linMotion = linvel*timeStep; + //todo: simd would have a vector max/min operation, instead of per-element access + if (linMotion.x() > 0.f) + temporalAabbMaxx += linMotion.x(); + else + temporalAabbMinx += linMotion.x(); + if (linMotion.y() > 0.f) + temporalAabbMaxy += linMotion.y(); + else + temporalAabbMiny += linMotion.y(); + if (linMotion.z() > 0.f) + temporalAabbMaxz += linMotion.z(); + else + temporalAabbMinz += linMotion.z(); + + //add conservative angular motion + btScalar angularMotion = angvel.length() * getAngularMotionDisc() * timeStep; + btVector3 angularMotion3d(angularMotion,angularMotion,angularMotion); + temporalAabbMin = btVector3(temporalAabbMinx,temporalAabbMiny,temporalAabbMinz); + temporalAabbMax = btVector3(temporalAabbMaxx,temporalAabbMaxy,temporalAabbMaxz); + + temporalAabbMin -= angularMotion3d; + temporalAabbMax += angularMotion3d; +} |