diff options
Diffstat (limited to 'extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h')
| -rw-r--r-- | extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h | 870 |
1 files changed, 823 insertions, 47 deletions
diff --git a/extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h b/extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h index 57bbb368672..d0ad09a385a 100644 --- a/extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h +++ b/extern/bullet2/src/BulletCollision/BroadphaseCollision/btAxisSweep3.h @@ -19,34 +19,26 @@ #ifndef AXIS_SWEEP_3_H #define AXIS_SWEEP_3_H -#include "../../LinearMath/btPoint3.h" -#include "../../LinearMath/btVector3.h" +#include "LinearMath/btPoint3.h" +#include "LinearMath/btVector3.h" #include "btOverlappingPairCache.h" +#include "btBroadphaseInterface.h" #include "btBroadphaseProxy.h" - - -//Enable BP_USE_FIXEDPOINT_INT_32 if you need more then 32767 objects -//#define BP_USE_FIXEDPOINT_INT_32 1 - -#ifdef BP_USE_FIXEDPOINT_INT_32 - #define BP_FP_INT_TYPE unsigned int - #define BP_MAX_HANDLES 1500000 //arbitrary maximum number of handles - #define BP_HANDLE_SENTINEL 0x7fffffff - #define BP_HANDLE_MASK 0xfffffffe -#else - #define BP_FP_INT_TYPE unsigned short int - #define BP_MAX_HANDLES 32767 - #define BP_HANDLE_SENTINEL 0xffff - #define BP_HANDLE_MASK 0xfffe -#endif //BP_USE_FIXEDPOINT_INT_32 +#include "btOverlappingPairCallback.h" //#define DEBUG_BROADPHASE 1 +#define USE_OVERLAP_TEST_ON_REMOVES 1 -/// btAxisSweep3 is an efficient implementation of the 3d axis sweep and prune broadphase. -/// It uses arrays rather then lists for storage of the 3 axis. Also it operates using integer coordinates instead of floats. -/// The testOverlap check is optimized to check the array index, rather then the actual AABB coordinates/pos -class btAxisSweep3 : public btOverlappingPairCache +/// The internal templace class btAxisSweep3Internal implements the sweep and prune broadphase. +/// It uses quantized integers to represent the begin and end points for each of the 3 axis. +/// Dont use this class directly, use btAxisSweep3 or bt32BitAxisSweep3 instead. +template <typename BP_FP_INT_TYPE> +class btAxisSweep3Internal : public btBroadphaseInterface { +protected: + + BP_FP_INT_TYPE m_bpHandleMask; + BP_FP_INT_TYPE m_handleSentinel; public: @@ -57,47 +49,57 @@ public: BP_FP_INT_TYPE m_pos; // low bit is min/max BP_FP_INT_TYPE m_handle; - BP_FP_INT_TYPE IsMax() const {return m_pos & 1;} + BP_FP_INT_TYPE IsMax() const {return static_cast<BP_FP_INT_TYPE>(m_pos & 1);} }; public: - class Handle : public btBroadphaseProxy + class Handle : public btBroadphaseProxy { public: - + BT_DECLARE_ALIGNED_ALLOCATOR(); + // indexes into the edge arrays BP_FP_INT_TYPE m_minEdges[3], m_maxEdges[3]; // 6 * 2 = 12 - BP_FP_INT_TYPE m_handleId; +// BP_FP_INT_TYPE m_uniqueId; BP_FP_INT_TYPE m_pad; //void* m_pOwner; this is now in btBroadphaseProxy.m_clientObject - inline void SetNextFree(BP_FP_INT_TYPE next) {m_minEdges[0] = next;} - inline BP_FP_INT_TYPE GetNextFree() const {return m_minEdges[0];} + SIMD_FORCE_INLINE void SetNextFree(BP_FP_INT_TYPE next) {m_minEdges[0] = next;} + SIMD_FORCE_INLINE BP_FP_INT_TYPE GetNextFree() const {return m_minEdges[0];} }; // 24 bytes + 24 for Edge structures = 44 bytes total per entry -private: +protected: btPoint3 m_worldAabbMin; // overall system bounds btPoint3 m_worldAabbMax; // overall system bounds btVector3 m_quantize; // scaling factor for quantization BP_FP_INT_TYPE m_numHandles; // number of active handles - int m_maxHandles; // max number of handles + BP_FP_INT_TYPE m_maxHandles; // max number of handles Handle* m_pHandles; // handles pool + BP_FP_INT_TYPE m_firstFreeHandle; // free handles list Edge* m_pEdges[3]; // edge arrays for the 3 axes (each array has m_maxHandles * 2 + 2 sentinel entries) + void* m_pEdgesRawPtr[3]; + + btOverlappingPairCache* m_pairCache; + + ///btOverlappingPairCallback is an additional optional user callback for adding/removing overlapping pairs, similar interface to btOverlappingPairCache. + btOverlappingPairCallback* m_userPairCallback; + + bool m_ownsPairCache; - int m_invalidPair; + int m_invalidPair; // allocation/deallocation BP_FP_INT_TYPE allocHandle(); void freeHandle(BP_FP_INT_TYPE handle); - bool testOverlap(int ignoreAxis,const Handle* pHandleA, const Handle* pHandleB); + bool testOverlap2D(const Handle* pHandleA, const Handle* pHandleB,int axis0,int axis1); #ifdef DEBUG_BROADPHASE void debugPrintAxis(int axis,bool checkCardinality=true); @@ -108,29 +110,803 @@ private: void quantize(BP_FP_INT_TYPE* out, const btPoint3& point, int isMax) const; - void sortMinDown(int axis, BP_FP_INT_TYPE edge, bool updateOverlaps = true); - void sortMinUp(int axis, BP_FP_INT_TYPE edge, bool updateOverlaps = true); - void sortMaxDown(int axis, BP_FP_INT_TYPE edge, bool updateOverlaps = true); - void sortMaxUp(int axis, BP_FP_INT_TYPE edge, bool updateOverlaps = true); + void sortMinDown(int axis, BP_FP_INT_TYPE edge, btDispatcher* dispatcher, bool updateOverlaps ); + void sortMinUp(int axis, BP_FP_INT_TYPE edge, btDispatcher* dispatcher, bool updateOverlaps ); + void sortMaxDown(int axis, BP_FP_INT_TYPE edge, btDispatcher* dispatcher, bool updateOverlaps ); + void sortMaxUp(int axis, BP_FP_INT_TYPE edge, btDispatcher* dispatcher, bool updateOverlaps ); public: - btAxisSweep3(const btPoint3& worldAabbMin,const btPoint3& worldAabbMax, int maxHandles = 16384); - virtual ~btAxisSweep3(); - virtual void refreshOverlappingPairs(); + btAxisSweep3Internal(const btPoint3& worldAabbMin,const btPoint3& worldAabbMax, BP_FP_INT_TYPE handleMask, BP_FP_INT_TYPE handleSentinel, BP_FP_INT_TYPE maxHandles = 16384, btOverlappingPairCache* pairCache=0); + + virtual ~btAxisSweep3Internal(); + + BP_FP_INT_TYPE getNumHandles() const + { + return m_numHandles; + } + + virtual void calculateOverlappingPairs(btDispatcher* dispatcher); - BP_FP_INT_TYPE addHandle(const btPoint3& aabbMin,const btPoint3& aabbMax, void* pOwner,short int collisionFilterGroup,short int collisionFilterMask); - void removeHandle(BP_FP_INT_TYPE handle); - void updateHandle(BP_FP_INT_TYPE handle, const btPoint3& aabbMin,const btPoint3& aabbMax); - inline Handle* getHandle(BP_FP_INT_TYPE index) const {return m_pHandles + index;} + BP_FP_INT_TYPE addHandle(const btPoint3& aabbMin,const btPoint3& aabbMax, void* pOwner,short int collisionFilterGroup,short int collisionFilterMask,btDispatcher* dispatcher,void* multiSapProxy); + void removeHandle(BP_FP_INT_TYPE handle,btDispatcher* dispatcher); + void updateHandle(BP_FP_INT_TYPE handle, const btPoint3& aabbMin,const btPoint3& aabbMax,btDispatcher* dispatcher); + SIMD_FORCE_INLINE Handle* getHandle(BP_FP_INT_TYPE index) const {return m_pHandles + index;} void processAllOverlappingPairs(btOverlapCallback* callback); //Broadphase Interface - virtual btBroadphaseProxy* createProxy( const btVector3& min, const btVector3& max,int shapeType,void* userPtr ,short int collisionFilterGroup,short int collisionFilterMask); - virtual void destroyProxy(btBroadphaseProxy* proxy); - virtual void setAabb(btBroadphaseProxy* proxy,const btVector3& aabbMin,const btVector3& aabbMax); - bool testOverlap(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1); + virtual btBroadphaseProxy* createProxy( const btVector3& aabbMin, const btVector3& aabbMax,int shapeType,void* userPtr ,short int collisionFilterGroup,short int collisionFilterMask,btDispatcher* dispatcher,void* multiSapProxy); + virtual void destroyProxy(btBroadphaseProxy* proxy,btDispatcher* dispatcher); + virtual void setAabb(btBroadphaseProxy* proxy,const btVector3& aabbMin,const btVector3& aabbMax,btDispatcher* dispatcher); + + bool testAabbOverlap(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1); + + btOverlappingPairCache* getOverlappingPairCache() + { + return m_pairCache; + } + const btOverlappingPairCache* getOverlappingPairCache() const + { + return m_pairCache; + } + + void setOverlappingPairUserCallback(btOverlappingPairCallback* pairCallback) + { + m_userPairCallback = pairCallback; + } + const btOverlappingPairCallback* getOverlappingPairUserCallback() const + { + return m_userPairCallback; + } + + ///getAabb returns the axis aligned bounding box in the 'global' coordinate frame + ///will add some transform later + virtual void getBroadphaseAabb(btVector3& aabbMin,btVector3& aabbMax) const + { + aabbMin = m_worldAabbMin; + aabbMax = m_worldAabbMax; + } + + virtual void printStats() + { +/* printf("btAxisSweep3.h\n"); + printf("numHandles = %d, maxHandles = %d\n",m_numHandles,m_maxHandles); + printf("aabbMin=%f,%f,%f,aabbMax=%f,%f,%f\n",m_worldAabbMin.getX(),m_worldAabbMin.getY(),m_worldAabbMin.getZ(), + m_worldAabbMax.getX(),m_worldAabbMax.getY(),m_worldAabbMax.getZ()); + */ + + } + +}; + +//////////////////////////////////////////////////////////////////// + + + + +#ifdef DEBUG_BROADPHASE +#include <stdio.h> + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3<BP_FP_INT_TYPE>::debugPrintAxis(int axis, bool checkCardinality) +{ + int numEdges = m_pHandles[0].m_maxEdges[axis]; + printf("SAP Axis %d, numEdges=%d\n",axis,numEdges); + + int i; + for (i=0;i<numEdges+1;i++) + { + Edge* pEdge = m_pEdges[axis] + i; + Handle* pHandlePrev = getHandle(pEdge->m_handle); + int handleIndex = pEdge->IsMax()? pHandlePrev->m_maxEdges[axis] : pHandlePrev->m_minEdges[axis]; + char beginOrEnd; + beginOrEnd=pEdge->IsMax()?'E':'B'; + printf(" [%c,h=%d,p=%x,i=%d]\n",beginOrEnd,pEdge->m_handle,pEdge->m_pos,handleIndex); + } + + if (checkCardinality) + assert(numEdges == m_numHandles*2+1); +} +#endif //DEBUG_BROADPHASE + +template <typename BP_FP_INT_TYPE> +btBroadphaseProxy* btAxisSweep3Internal<BP_FP_INT_TYPE>::createProxy( const btVector3& aabbMin, const btVector3& aabbMax,int shapeType,void* userPtr,short int collisionFilterGroup,short int collisionFilterMask,btDispatcher* dispatcher,void* multiSapProxy) +{ + (void)shapeType; + BP_FP_INT_TYPE handleId = addHandle(aabbMin,aabbMax, userPtr,collisionFilterGroup,collisionFilterMask,dispatcher,multiSapProxy); + + Handle* handle = getHandle(handleId); + + return handle; +} + + + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::destroyProxy(btBroadphaseProxy* proxy,btDispatcher* dispatcher) +{ + Handle* handle = static_cast<Handle*>(proxy); + removeHandle(static_cast<BP_FP_INT_TYPE>(handle->m_uniqueId), dispatcher); +} + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::setAabb(btBroadphaseProxy* proxy,const btVector3& aabbMin,const btVector3& aabbMax,btDispatcher* dispatcher) +{ + Handle* handle = static_cast<Handle*>(proxy); + updateHandle(static_cast<BP_FP_INT_TYPE>(handle->m_uniqueId), aabbMin, aabbMax,dispatcher); + +} + + + + + +template <typename BP_FP_INT_TYPE> +btAxisSweep3Internal<BP_FP_INT_TYPE>::btAxisSweep3Internal(const btPoint3& worldAabbMin,const btPoint3& worldAabbMax, BP_FP_INT_TYPE handleMask, BP_FP_INT_TYPE handleSentinel,BP_FP_INT_TYPE userMaxHandles, btOverlappingPairCache* pairCache ) +:m_bpHandleMask(handleMask), +m_handleSentinel(handleSentinel), +m_pairCache(pairCache), +m_userPairCallback(0), +m_ownsPairCache(false), +m_invalidPair(0) +{ + BP_FP_INT_TYPE maxHandles = static_cast<BP_FP_INT_TYPE>(userMaxHandles+1);//need to add one sentinel handle + + if (!m_pairCache) + { + void* ptr = btAlignedAlloc(sizeof(btHashedOverlappingPairCache),16); + m_pairCache = new(ptr) btHashedOverlappingPairCache(); + m_ownsPairCache = true; + } + + //assert(bounds.HasVolume()); + + // init bounds + m_worldAabbMin = worldAabbMin; + m_worldAabbMax = worldAabbMax; + + btVector3 aabbSize = m_worldAabbMax - m_worldAabbMin; + + BP_FP_INT_TYPE maxInt = m_handleSentinel; + + m_quantize = btVector3(btScalar(maxInt),btScalar(maxInt),btScalar(maxInt)) / aabbSize; + + // allocate handles buffer, using btAlignedAlloc, and put all handles on free list + m_pHandles = new Handle[maxHandles]; + + m_maxHandles = maxHandles; + m_numHandles = 0; + + // handle 0 is reserved as the null index, and is also used as the sentinel + m_firstFreeHandle = 1; + { + for (BP_FP_INT_TYPE i = m_firstFreeHandle; i < maxHandles; i++) + m_pHandles[i].SetNextFree(static_cast<BP_FP_INT_TYPE>(i + 1)); + m_pHandles[maxHandles - 1].SetNextFree(0); + } + + { + // allocate edge buffers + for (int i = 0; i < 3; i++) + { + m_pEdgesRawPtr[i] = btAlignedAlloc(sizeof(Edge)*maxHandles*2,16); + m_pEdges[i] = new(m_pEdgesRawPtr[i]) Edge[maxHandles * 2]; + } + } + //removed overlap management + + // make boundary sentinels + + m_pHandles[0].m_clientObject = 0; + + for (int axis = 0; axis < 3; axis++) + { + m_pHandles[0].m_minEdges[axis] = 0; + m_pHandles[0].m_maxEdges[axis] = 1; + + m_pEdges[axis][0].m_pos = 0; + m_pEdges[axis][0].m_handle = 0; + m_pEdges[axis][1].m_pos = m_handleSentinel; + m_pEdges[axis][1].m_handle = 0; +#ifdef DEBUG_BROADPHASE + debugPrintAxis(axis); +#endif //DEBUG_BROADPHASE + + } + +} + +template <typename BP_FP_INT_TYPE> +btAxisSweep3Internal<BP_FP_INT_TYPE>::~btAxisSweep3Internal() +{ + + for (int i = 2; i >= 0; i--) + { + btAlignedFree(m_pEdgesRawPtr[i]); + } + delete [] m_pHandles; + + if (m_ownsPairCache) + { + m_pairCache->~btOverlappingPairCache(); + btAlignedFree(m_pairCache); + } +} + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::quantize(BP_FP_INT_TYPE* out, const btPoint3& point, int isMax) const +{ + btPoint3 clampedPoint(point); + + + + clampedPoint.setMax(m_worldAabbMin); + clampedPoint.setMin(m_worldAabbMax); + + btVector3 v = (clampedPoint - m_worldAabbMin) * m_quantize; + out[0] = (BP_FP_INT_TYPE)(((BP_FP_INT_TYPE)v.getX() & m_bpHandleMask) | isMax); + out[1] = (BP_FP_INT_TYPE)(((BP_FP_INT_TYPE)v.getY() & m_bpHandleMask) | isMax); + out[2] = (BP_FP_INT_TYPE)(((BP_FP_INT_TYPE)v.getZ() & m_bpHandleMask) | isMax); + +} + + +template <typename BP_FP_INT_TYPE> +BP_FP_INT_TYPE btAxisSweep3Internal<BP_FP_INT_TYPE>::allocHandle() +{ + assert(m_firstFreeHandle); + + BP_FP_INT_TYPE handle = m_firstFreeHandle; + m_firstFreeHandle = getHandle(handle)->GetNextFree(); + m_numHandles++; + + return handle; +} + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::freeHandle(BP_FP_INT_TYPE handle) +{ + assert(handle > 0 && handle < m_maxHandles); + + getHandle(handle)->SetNextFree(m_firstFreeHandle); + m_firstFreeHandle = handle; + + m_numHandles--; +} + + +template <typename BP_FP_INT_TYPE> +BP_FP_INT_TYPE btAxisSweep3Internal<BP_FP_INT_TYPE>::addHandle(const btPoint3& aabbMin,const btPoint3& aabbMax, void* pOwner,short int collisionFilterGroup,short int collisionFilterMask,btDispatcher* dispatcher,void* multiSapProxy) +{ + // quantize the bounds + BP_FP_INT_TYPE min[3], max[3]; + quantize(min, aabbMin, 0); + quantize(max, aabbMax, 1); + + // allocate a handle + BP_FP_INT_TYPE handle = allocHandle(); + + + Handle* pHandle = getHandle(handle); + + pHandle->m_uniqueId = static_cast<int>(handle); + //pHandle->m_pOverlaps = 0; + pHandle->m_clientObject = pOwner; + pHandle->m_collisionFilterGroup = collisionFilterGroup; + pHandle->m_collisionFilterMask = collisionFilterMask; + pHandle->m_multiSapParentProxy = multiSapProxy; + + // compute current limit of edge arrays + BP_FP_INT_TYPE limit = static_cast<BP_FP_INT_TYPE>(m_numHandles * 2); + + + // insert new edges just inside the max boundary edge + for (BP_FP_INT_TYPE axis = 0; axis < 3; axis++) + { + + m_pHandles[0].m_maxEdges[axis] += 2; + + m_pEdges[axis][limit + 1] = m_pEdges[axis][limit - 1]; + + m_pEdges[axis][limit - 1].m_pos = min[axis]; + m_pEdges[axis][limit - 1].m_handle = handle; + + m_pEdges[axis][limit].m_pos = max[axis]; + m_pEdges[axis][limit].m_handle = handle; + + pHandle->m_minEdges[axis] = static_cast<BP_FP_INT_TYPE>(limit - 1); + pHandle->m_maxEdges[axis] = limit; + } + + // now sort the new edges to their correct position + sortMinDown(0, pHandle->m_minEdges[0], dispatcher,false); + sortMaxDown(0, pHandle->m_maxEdges[0], dispatcher,false); + sortMinDown(1, pHandle->m_minEdges[1], dispatcher,false); + sortMaxDown(1, pHandle->m_maxEdges[1], dispatcher,false); + sortMinDown(2, pHandle->m_minEdges[2], dispatcher,true); + sortMaxDown(2, pHandle->m_maxEdges[2], dispatcher,true); + + + return handle; +} + + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::removeHandle(BP_FP_INT_TYPE handle,btDispatcher* dispatcher) +{ + + Handle* pHandle = getHandle(handle); + + //explicitly remove the pairs containing the proxy + //we could do it also in the sortMinUp (passing true) + //todo: compare performance + if (!m_pairCache->hasDeferredRemoval()) + { + m_pairCache->removeOverlappingPairsContainingProxy(pHandle,dispatcher); + } + + // compute current limit of edge arrays + int limit = static_cast<int>(m_numHandles * 2); + + int axis; + + for (axis = 0;axis<3;axis++) + { + m_pHandles[0].m_maxEdges[axis] -= 2; + } + + // remove the edges by sorting them up to the end of the list + for ( axis = 0; axis < 3; axis++) + { + Edge* pEdges = m_pEdges[axis]; + BP_FP_INT_TYPE max = pHandle->m_maxEdges[axis]; + pEdges[max].m_pos = m_handleSentinel; + + sortMaxUp(axis,max,dispatcher,false); + + + BP_FP_INT_TYPE i = pHandle->m_minEdges[axis]; + pEdges[i].m_pos = m_handleSentinel; + + + sortMinUp(axis,i,dispatcher,false); + + pEdges[limit-1].m_handle = 0; + pEdges[limit-1].m_pos = m_handleSentinel; + +#ifdef DEBUG_BROADPHASE + debugPrintAxis(axis,false); +#endif //DEBUG_BROADPHASE + + + } + + + // free the handle + freeHandle(handle); + + +} + +extern int gOverlappingPairs; +//#include <stdio.h> + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::calculateOverlappingPairs(btDispatcher* dispatcher) +{ + + if (m_pairCache->hasDeferredRemoval()) + { + + btBroadphasePairArray& overlappingPairArray = m_pairCache->getOverlappingPairArray(); + + //perform a sort, to find duplicates and to sort 'invalid' pairs to the end + overlappingPairArray.quickSort(btBroadphasePairSortPredicate()); + + overlappingPairArray.resize(overlappingPairArray.size() - m_invalidPair); + m_invalidPair = 0; + + + int i; + + btBroadphasePair previousPair; + previousPair.m_pProxy0 = 0; + previousPair.m_pProxy1 = 0; + previousPair.m_algorithm = 0; + + + for (i=0;i<overlappingPairArray.size();i++) + { + + btBroadphasePair& pair = overlappingPairArray[i]; + + bool isDuplicate = (pair == previousPair); + + previousPair = pair; + + bool needsRemoval = false; + + if (!isDuplicate) + { + bool hasOverlap = testAabbOverlap(pair.m_pProxy0,pair.m_pProxy1); + + if (hasOverlap) + { + needsRemoval = false;//callback->processOverlap(pair); + } else + { + needsRemoval = true; + } + } else + { + //remove duplicate + needsRemoval = true; + //should have no algorithm + btAssert(!pair.m_algorithm); + } + + if (needsRemoval) + { + m_pairCache->cleanOverlappingPair(pair,dispatcher); + + // m_overlappingPairArray.swap(i,m_overlappingPairArray.size()-1); + // m_overlappingPairArray.pop_back(); + pair.m_pProxy0 = 0; + pair.m_pProxy1 = 0; + m_invalidPair++; + gOverlappingPairs--; + } + + } + + ///if you don't like to skip the invalid pairs in the array, execute following code: + #define CLEAN_INVALID_PAIRS 1 + #ifdef CLEAN_INVALID_PAIRS + + //perform a sort, to sort 'invalid' pairs to the end + overlappingPairArray.quickSort(btBroadphasePairSortPredicate()); + + overlappingPairArray.resize(overlappingPairArray.size() - m_invalidPair); + m_invalidPair = 0; + #endif//CLEAN_INVALID_PAIRS + + //printf("overlappingPairArray.size()=%d\n",overlappingPairArray.size()); + } + + + + + +} + + +template <typename BP_FP_INT_TYPE> +bool btAxisSweep3Internal<BP_FP_INT_TYPE>::testAabbOverlap(btBroadphaseProxy* proxy0,btBroadphaseProxy* proxy1) +{ + const Handle* pHandleA = static_cast<Handle*>(proxy0); + const Handle* pHandleB = static_cast<Handle*>(proxy1); + + //optimization 1: check the array index (memory address), instead of the m_pos + + for (int axis = 0; axis < 3; axis++) + { + if (pHandleA->m_maxEdges[axis] < pHandleB->m_minEdges[axis] || + pHandleB->m_maxEdges[axis] < pHandleA->m_minEdges[axis]) + { + return false; + } + } + return true; +} + +template <typename BP_FP_INT_TYPE> +bool btAxisSweep3Internal<BP_FP_INT_TYPE>::testOverlap2D(const Handle* pHandleA, const Handle* pHandleB,int axis0,int axis1) +{ + //optimization 1: check the array index (memory address), instead of the m_pos + + if (pHandleA->m_maxEdges[axis0] < pHandleB->m_minEdges[axis0] || + pHandleB->m_maxEdges[axis0] < pHandleA->m_minEdges[axis0] || + pHandleA->m_maxEdges[axis1] < pHandleB->m_minEdges[axis1] || + pHandleB->m_maxEdges[axis1] < pHandleA->m_minEdges[axis1]) + { + return false; + } + return true; +} + +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::updateHandle(BP_FP_INT_TYPE handle, const btPoint3& aabbMin,const btPoint3& aabbMax,btDispatcher* dispatcher) +{ +// assert(bounds.IsFinite()); + //assert(bounds.HasVolume()); + + Handle* pHandle = getHandle(handle); + + // quantize the new bounds + BP_FP_INT_TYPE min[3], max[3]; + quantize(min, aabbMin, 0); + quantize(max, aabbMax, 1); + + // update changed edges + for (int axis = 0; axis < 3; axis++) + { + BP_FP_INT_TYPE emin = pHandle->m_minEdges[axis]; + BP_FP_INT_TYPE emax = pHandle->m_maxEdges[axis]; + + int dmin = (int)min[axis] - (int)m_pEdges[axis][emin].m_pos; + int dmax = (int)max[axis] - (int)m_pEdges[axis][emax].m_pos; + + m_pEdges[axis][emin].m_pos = min[axis]; + m_pEdges[axis][emax].m_pos = max[axis]; + + // expand (only adds overlaps) + if (dmin < 0) + sortMinDown(axis, emin,dispatcher,true); + + if (dmax > 0) + sortMaxUp(axis, emax,dispatcher,true); + + // shrink (only removes overlaps) + if (dmin > 0) + sortMinUp(axis, emin,dispatcher,true); + + if (dmax < 0) + sortMaxDown(axis, emax,dispatcher,true); + +#ifdef DEBUG_BROADPHASE + debugPrintAxis(axis); +#endif //DEBUG_BROADPHASE + } + + +} + + + + +// sorting a min edge downwards can only ever *add* overlaps +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::sortMinDown(int axis, BP_FP_INT_TYPE edge, btDispatcher* /* dispatcher */, bool updateOverlaps) +{ + + Edge* pEdge = m_pEdges[axis] + edge; + Edge* pPrev = pEdge - 1; + Handle* pHandleEdge = getHandle(pEdge->m_handle); + + while (pEdge->m_pos < pPrev->m_pos) + { + Handle* pHandlePrev = getHandle(pPrev->m_handle); + + if (pPrev->IsMax()) + { + // if previous edge is a maximum check the bounds and add an overlap if necessary + const int axis1 = (1 << axis) & 3; + const int axis2 = (1 << axis1) & 3; + if (updateOverlaps && testOverlap2D(pHandleEdge, pHandlePrev,axis1,axis2)) + { + m_pairCache->addOverlappingPair(pHandleEdge,pHandlePrev); + if (m_userPairCallback) + m_userPairCallback->addOverlappingPair(pHandleEdge,pHandlePrev); + + //AddOverlap(pEdge->m_handle, pPrev->m_handle); + + } + + // update edge reference in other handle + pHandlePrev->m_maxEdges[axis]++; + } + else + pHandlePrev->m_minEdges[axis]++; + + pHandleEdge->m_minEdges[axis]--; + + // swap the edges + Edge swap = *pEdge; + *pEdge = *pPrev; + *pPrev = swap; + + // decrement + pEdge--; + pPrev--; + } + +#ifdef DEBUG_BROADPHASE + debugPrintAxis(axis); +#endif //DEBUG_BROADPHASE + +} + +// sorting a min edge upwards can only ever *remove* overlaps +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::sortMinUp(int axis, BP_FP_INT_TYPE edge, btDispatcher* dispatcher, bool updateOverlaps) +{ + Edge* pEdge = m_pEdges[axis] + edge; + Edge* pNext = pEdge + 1; + Handle* pHandleEdge = getHandle(pEdge->m_handle); + + while (pNext->m_handle && (pEdge->m_pos >= pNext->m_pos)) + { + Handle* pHandleNext = getHandle(pNext->m_handle); + + if (pNext->IsMax()) + { + Handle* handle0 = getHandle(pEdge->m_handle); + Handle* handle1 = getHandle(pNext->m_handle); + const int axis1 = (1 << axis) & 3; + const int axis2 = (1 << axis1) & 3; + + // if next edge is maximum remove any overlap between the two handles + if (updateOverlaps +#ifdef USE_OVERLAP_TEST_ON_REMOVES + && testOverlap2D(handle0,handle1,axis1,axis2) +#endif //USE_OVERLAP_TEST_ON_REMOVES + ) + { + + + m_pairCache->removeOverlappingPair(handle0,handle1,dispatcher); + if (m_userPairCallback) + m_userPairCallback->removeOverlappingPair(handle0,handle1,dispatcher); + + } + + + // update edge reference in other handle + pHandleNext->m_maxEdges[axis]--; + } + else + pHandleNext->m_minEdges[axis]--; + + pHandleEdge->m_minEdges[axis]++; + + // swap the edges + Edge swap = *pEdge; + *pEdge = *pNext; + *pNext = swap; + + // increment + pEdge++; + pNext++; + } + + +} + +// sorting a max edge downwards can only ever *remove* overlaps +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::sortMaxDown(int axis, BP_FP_INT_TYPE edge, btDispatcher* dispatcher, bool updateOverlaps) +{ + + Edge* pEdge = m_pEdges[axis] + edge; + Edge* pPrev = pEdge - 1; + Handle* pHandleEdge = getHandle(pEdge->m_handle); + + while (pEdge->m_pos < pPrev->m_pos) + { + Handle* pHandlePrev = getHandle(pPrev->m_handle); + + if (!pPrev->IsMax()) + { + // if previous edge was a minimum remove any overlap between the two handles + Handle* handle0 = getHandle(pEdge->m_handle); + Handle* handle1 = getHandle(pPrev->m_handle); + const int axis1 = (1 << axis) & 3; + const int axis2 = (1 << axis1) & 3; + + if (updateOverlaps +#ifdef USE_OVERLAP_TEST_ON_REMOVES + && testOverlap2D(handle0,handle1,axis1,axis2) +#endif //USE_OVERLAP_TEST_ON_REMOVES + ) + { + //this is done during the overlappingpairarray iteration/narrowphase collision + + + m_pairCache->removeOverlappingPair(handle0,handle1,dispatcher); + if (m_userPairCallback) + m_userPairCallback->removeOverlappingPair(handle0,handle1,dispatcher); + + + + } + + // update edge reference in other handle + pHandlePrev->m_minEdges[axis]++;; + } + else + pHandlePrev->m_maxEdges[axis]++; + + pHandleEdge->m_maxEdges[axis]--; + + // swap the edges + Edge swap = *pEdge; + *pEdge = *pPrev; + *pPrev = swap; + + // decrement + pEdge--; + pPrev--; + } + + +#ifdef DEBUG_BROADPHASE + debugPrintAxis(axis); +#endif //DEBUG_BROADPHASE + +} + +// sorting a max edge upwards can only ever *add* overlaps +template <typename BP_FP_INT_TYPE> +void btAxisSweep3Internal<BP_FP_INT_TYPE>::sortMaxUp(int axis, BP_FP_INT_TYPE edge, btDispatcher* /* dispatcher */, bool updateOverlaps) +{ + Edge* pEdge = m_pEdges[axis] + edge; + Edge* pNext = pEdge + 1; + Handle* pHandleEdge = getHandle(pEdge->m_handle); + + while (pNext->m_handle && (pEdge->m_pos >= pNext->m_pos)) + { + Handle* pHandleNext = getHandle(pNext->m_handle); + + const int axis1 = (1 << axis) & 3; + const int axis2 = (1 << axis1) & 3; + + if (!pNext->IsMax()) + { + // if next edge is a minimum check the bounds and add an overlap if necessary + if (updateOverlaps && testOverlap2D(pHandleEdge, pHandleNext,axis1,axis2)) + { + Handle* handle0 = getHandle(pEdge->m_handle); + Handle* handle1 = getHandle(pNext->m_handle); + m_pairCache->addOverlappingPair(handle0,handle1); + if (m_userPairCallback) + m_userPairCallback->addOverlappingPair(handle0,handle1); + } + + // update edge reference in other handle + pHandleNext->m_minEdges[axis]--; + } + else + pHandleNext->m_maxEdges[axis]--; + + pHandleEdge->m_maxEdges[axis]++; + + // swap the edges + Edge swap = *pEdge; + *pEdge = *pNext; + *pNext = swap; + + // increment + pEdge++; + pNext++; + } + +} + + + +//////////////////////////////////////////////////////////////////// + + +/// The btAxisSweep3 is an efficient implementation of the 3d axis sweep and prune broadphase. +/// It uses arrays rather then lists for storage of the 3 axis. Also it operates using 16 bit integer coordinates instead of floats. +/// For large worlds and many objects, use bt32BitAxisSweep3 or btDbvtBroadphase instead. bt32BitAxisSweep3 has higher precision and allows more then 16384 objects at the cost of more memory and bit of performance. +class btAxisSweep3 : public btAxisSweep3Internal<unsigned short int> +{ +public: + + btAxisSweep3(const btPoint3& worldAabbMin,const btPoint3& worldAabbMax, unsigned short int maxHandles = 16384, btOverlappingPairCache* pairCache = 0); + +}; + +/// The bt32BitAxisSweep3 allows higher precision quantization and more objects compared to the btAxisSweep3 sweep and prune. +/// This comes at the cost of more memory per handle, and a bit slower performance. +/// It uses arrays rather then lists for storage of the 3 axis. +class bt32BitAxisSweep3 : public btAxisSweep3Internal<unsigned int> +{ +public: + + bt32BitAxisSweep3(const btPoint3& worldAabbMin,const btPoint3& worldAabbMax, unsigned int maxHandles = 1500000, btOverlappingPairCache* pairCache = 0); }; |