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Diffstat (limited to 'thirdparty/bullet/BulletCollision/CollisionDispatch/btGhostObject.h')
| -rw-r--r-- | thirdparty/bullet/BulletCollision/CollisionDispatch/btGhostObject.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/thirdparty/bullet/BulletCollision/CollisionDispatch/btGhostObject.h b/thirdparty/bullet/BulletCollision/CollisionDispatch/btGhostObject.h new file mode 100644 index 0000000000..8ec8613857 --- /dev/null +++ b/thirdparty/bullet/BulletCollision/CollisionDispatch/btGhostObject.h @@ -0,0 +1,175 @@ +/* +Bullet Continuous Collision Detection and Physics Library +Copyright (c) 2003-2008 Erwin Coumans http://bulletphysics.com + +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. +*/ + +#ifndef BT_GHOST_OBJECT_H +#define BT_GHOST_OBJECT_H + + +#include "btCollisionObject.h" +#include "BulletCollision/BroadphaseCollision/btOverlappingPairCallback.h" +#include "LinearMath/btAlignedAllocator.h" +#include "BulletCollision/BroadphaseCollision/btOverlappingPairCache.h" +#include "btCollisionWorld.h" + +class btConvexShape; + +class btDispatcher; + +///The btGhostObject can keep track of all objects that are overlapping +///By default, this overlap is based on the AABB +///This is useful for creating a character controller, collision sensors/triggers, explosions etc. +///We plan on adding rayTest and other queries for the btGhostObject +ATTRIBUTE_ALIGNED16(class) btGhostObject : public btCollisionObject +{ +protected: + + btAlignedObjectArray<btCollisionObject*> m_overlappingObjects; + +public: + + btGhostObject(); + + virtual ~btGhostObject(); + + void convexSweepTest(const class btConvexShape* castShape, const btTransform& convexFromWorld, const btTransform& convexToWorld, btCollisionWorld::ConvexResultCallback& resultCallback, btScalar allowedCcdPenetration = 0.f) const; + + void rayTest(const btVector3& rayFromWorld, const btVector3& rayToWorld, btCollisionWorld::RayResultCallback& resultCallback) const; + + ///this method is mainly for expert/internal use only. + virtual void addOverlappingObjectInternal(btBroadphaseProxy* otherProxy, btBroadphaseProxy* thisProxy=0); + ///this method is mainly for expert/internal use only. + virtual void removeOverlappingObjectInternal(btBroadphaseProxy* otherProxy,btDispatcher* dispatcher,btBroadphaseProxy* thisProxy=0); + + int getNumOverlappingObjects() const + { + return m_overlappingObjects.size(); + } + + btCollisionObject* getOverlappingObject(int index) + { + return m_overlappingObjects[index]; + } + + const btCollisionObject* getOverlappingObject(int index) const + { + return m_overlappingObjects[index]; + } + + btAlignedObjectArray<btCollisionObject*>& getOverlappingPairs() + { + return m_overlappingObjects; + } + + const btAlignedObjectArray<btCollisionObject*> getOverlappingPairs() const + { + return m_overlappingObjects; + } + + // + // internal cast + // + + static const btGhostObject* upcast(const btCollisionObject* colObj) + { + if (colObj->getInternalType()==CO_GHOST_OBJECT) + return (const btGhostObject*)colObj; + return 0; + } + static btGhostObject* upcast(btCollisionObject* colObj) + { + if (colObj->getInternalType()==CO_GHOST_OBJECT) + return (btGhostObject*)colObj; + return 0; + } + +}; + +class btPairCachingGhostObject : public btGhostObject +{ + btHashedOverlappingPairCache* m_hashPairCache; + +public: + + btPairCachingGhostObject(); + + virtual ~btPairCachingGhostObject(); + + ///this method is mainly for expert/internal use only. + virtual void addOverlappingObjectInternal(btBroadphaseProxy* otherProxy, btBroadphaseProxy* thisProxy=0); + + virtual void removeOverlappingObjectInternal(btBroadphaseProxy* otherProxy,btDispatcher* dispatcher,btBroadphaseProxy* thisProxy=0); + + btHashedOverlappingPairCache* getOverlappingPairCache() + { + return m_hashPairCache; + } + +}; + + + +///The btGhostPairCallback interfaces and forwards adding and removal of overlapping pairs from the btBroadphaseInterface to btGhostObject. +class btGhostPairCallback : public btOverlappingPairCallback +{ + +public: + btGhostPairCallback() + { + } + + virtual ~btGhostPairCallback() + { + + } + + virtual btBroadphasePair* addOverlappingPair(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1) + { + btCollisionObject* colObj0 = (btCollisionObject*) proxy0->m_clientObject; + btCollisionObject* colObj1 = (btCollisionObject*) proxy1->m_clientObject; + btGhostObject* ghost0 = btGhostObject::upcast(colObj0); + btGhostObject* ghost1 = btGhostObject::upcast(colObj1); + if (ghost0) + ghost0->addOverlappingObjectInternal(proxy1, proxy0); + if (ghost1) + ghost1->addOverlappingObjectInternal(proxy0, proxy1); + return 0; + } + + virtual void* removeOverlappingPair(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1,btDispatcher* dispatcher) + { + btCollisionObject* colObj0 = (btCollisionObject*) proxy0->m_clientObject; + btCollisionObject* colObj1 = (btCollisionObject*) proxy1->m_clientObject; + btGhostObject* ghost0 = btGhostObject::upcast(colObj0); + btGhostObject* ghost1 = btGhostObject::upcast(colObj1); + if (ghost0) + ghost0->removeOverlappingObjectInternal(proxy1,dispatcher,proxy0); + if (ghost1) + ghost1->removeOverlappingObjectInternal(proxy0,dispatcher,proxy1); + return 0; + } + + virtual void removeOverlappingPairsContainingProxy(btBroadphaseProxy* /*proxy0*/,btDispatcher* /*dispatcher*/) + { + btAssert(0); + //need to keep track of all ghost objects and call them here + //m_hashPairCache->removeOverlappingPairsContainingProxy(proxy0,dispatcher); + } + + + +}; + +#endif + |