130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
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/*
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Bullet Continuous Collision Detection and Physics Library
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Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it freely,
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subject to the following restrictions:
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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.
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2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef OVERLAPPING_PAIR_CACHE_H
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#define OVERLAPPING_PAIR_CACHE_H
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#include "btBroadphaseInterface.h"
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#include "btBroadphaseProxy.h"
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#include "LinearMath/btPoint3.h"
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#include "LinearMath/btAlignedObjectArray.h"
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struct btOverlapCallback
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{
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virtual ~btOverlapCallback()
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{}
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//return true for deletion of the pair
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virtual bool processOverlap(btBroadphasePair& pair) = 0;
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};
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struct btOverlapFilterCallback
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{
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virtual ~btOverlapFilterCallback()
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{}
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// return true when pairs need collision
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virtual bool needBroadphaseCollision(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1) const = 0;
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};
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typedef btAlignedObjectArray<btBroadphasePair> btBroadphasePairArray;
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///btOverlappingPairCache maintains the objects with overlapping AABB
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///Typically managed by the Broadphase, Axis3Sweep or btSimpleBroadphase
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class btOverlappingPairCache
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{
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protected:
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//avoid brute-force finding all the time
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btBroadphasePairArray m_overlappingPairArray;
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//during the dispatch, check that user doesn't destroy/create proxy
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bool m_blockedForChanges;
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//if set, use the callback instead of the built in filter in needBroadphaseCollision
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btOverlapFilterCallback* m_overlapFilterCallback;
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public:
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btOverlappingPairCache();
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virtual ~btOverlappingPairCache();
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virtual void processAllOverlappingPairs(btOverlapCallback*);
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void removeOverlappingPair(btBroadphasePair& pair);
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void cleanOverlappingPair(btBroadphasePair& pair);
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void addOverlappingPair(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1);
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btBroadphasePair* findPair(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1);
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void cleanProxyFromPairs(btBroadphaseProxy* proxy);
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void removeOverlappingPairsContainingProxy(btBroadphaseProxy* proxy);
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inline bool needsBroadphaseCollision(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1) const
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{
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if (m_overlapFilterCallback)
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return m_overlapFilterCallback->needBroadphaseCollision(proxy0,proxy1);
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bool collides = (proxy0->m_collisionFilterGroup & proxy1->m_collisionFilterMask) != 0;
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collides = collides && (proxy1->m_collisionFilterGroup & proxy0->m_collisionFilterMask);
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return collides;
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}
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btBroadphasePairArray& getOverlappingPairArray()
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{
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return m_overlappingPairArray;
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}
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const btBroadphasePairArray& getOverlappingPairArray() const
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{
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return m_overlappingPairArray;
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}
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btBroadphasePair* getOverlappingPairArrayPtr()
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{
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return &m_overlappingPairArray[0];
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}
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const btBroadphasePair* getOverlappingPairArrayPtr() const
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{
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return &m_overlappingPairArray[0];
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}
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int getNumOverlappingPairs() const
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{
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return m_overlappingPairArray.size();
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}
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btOverlapFilterCallback* getOverlapFilterCallback()
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{
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return m_overlapFilterCallback;
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}
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void setOverlapFilterCallback(btOverlapFilterCallback* callback)
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{
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m_overlapFilterCallback = callback;
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}
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};
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#endif //OVERLAPPING_PAIR_CACHE_H
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