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DavidWyand-GG 2012-09-19 11:15:01 -04:00
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Engine/lib/opcode/OPC_SweepAndPrune.h Normal file
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/*
* OPCODE - Optimized Collision Detection
* Copyright (C) 2001 Pierre Terdiman
* Homepage: http://www.codercorner.com/Opcode.htm
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Contains an implementation of the sweep-and-prune algorithm (moved from Z-Collide)
* \file OPC_SweepAndPrune.h
* \author Pierre Terdiman
* \date January, 29, 2000
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Include Guard
#ifndef __OPC_SWEEPANDPRUNE_H__
#define __OPC_SWEEPANDPRUNE_H__
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* User-callback, called by OPCODE for each colliding pairs.
* \param id0 [in] id of colliding object
* \param id1 [in] id of colliding object
* \param user_data [in] user-defined data
* \return TRUE to continue enumeration
*/
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
typedef BOOL (*PairCallback) (udword id0, udword id1, void* user_data);
class SAP_Element;
class SAP_EndPoint;
class SAP_Box;
class OPCODE_API SAP_PairData
{
public:
SAP_PairData();
~SAP_PairData();
bool Init(udword nb_objects);
void AddPair(udword id1, udword id2);
void RemovePair(udword id1, udword id2);
void DumpPairs(Pairs& pairs) const;
void DumpPairs(PairCallback callback, void* user_data) const;
private:
udword mNbElements; //!< Total number of elements in the pool
udword mNbUsedElements; //!< Number of used elements
SAP_Element* mElementPool; //!< Array of mNbElements elements
SAP_Element* mFirstFree; //!< First free element in the pool
udword mNbObjects; //!< Max number of objects we can handle
SAP_Element** mArray; //!< Pointers to pool
// Internal methods
SAP_Element* GetFreeElem(udword id, SAP_Element* next, udword* remap=null);
inline_ void FreeElem(SAP_Element* elem);
void Release();
};
class OPCODE_API SweepAndPrune
{
public:
SweepAndPrune();
~SweepAndPrune();
bool Init(udword nb_objects, const AABB** boxes);
bool UpdateObject(udword i, const AABB& box);
void GetPairs(Pairs& pairs) const;
void GetPairs(PairCallback callback, void* user_data) const;
private:
SAP_PairData mPairs;
udword mNbObjects;
SAP_Box* mBoxes;
SAP_EndPoint* mList[3];
// Internal methods
bool CheckListsIntegrity();
};
#endif //__OPC_SWEEPANDPRUNE_H__