95 lines
4.0 KiB
C
95 lines
4.0 KiB
C
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/*
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* OPCODE - Optimized Collision Detection
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* http://www.codercorner.com/Opcode.htm
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*
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* Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
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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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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Contains an implementation of the sweep-and-prune algorithm (moved from Z-Collide)
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* \file OPC_SweepAndPrune.h
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* \author Pierre Terdiman
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* \date January, 29, 2000
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Include Guard
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#ifndef __OPC_SWEEPANDPRUNE_H__
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#define __OPC_SWEEPANDPRUNE_H__
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* User-callback, called by OPCODE for each colliding pairs.
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* \param id0 [in] id of colliding object
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* \param id1 [in] id of colliding object
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* \param user_data [in] user-defined data
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* \return TRUE to continue enumeration
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*/
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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typedef BOOL (*PairCallback) (udword id0, udword id1, void* user_data);
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class SAP_Element;
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class SAP_EndPoint;
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class SAP_Box;
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class OPCODE_API SAP_PairData
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{
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public:
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SAP_PairData();
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~SAP_PairData();
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bool Init(udword nb_objects);
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void AddPair(udword id1, udword id2);
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void RemovePair(udword id1, udword id2);
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void DumpPairs(Pairs& pairs) const;
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void DumpPairs(PairCallback callback, void* user_data) const;
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private:
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udword mNbElements; //!< Total number of elements in the pool
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udword mNbUsedElements; //!< Number of used elements
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SAP_Element* mElementPool; //!< Array of mNbElements elements
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SAP_Element* mFirstFree; //!< First free element in the pool
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udword mNbObjects; //!< Max number of objects we can handle
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SAP_Element** mArray; //!< Pointers to pool
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// Internal methods
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SAP_Element* GetFreeElem(udword id, SAP_Element* next, udword* remap=null);
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inline_ void FreeElem(SAP_Element* elem);
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void Release();
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};
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class OPCODE_API SweepAndPrune
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{
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public:
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SweepAndPrune();
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~SweepAndPrune();
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bool Init(udword nb_objects, const AABB** boxes);
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bool UpdateObject(udword i, const AABB& box);
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void GetPairs(Pairs& pairs) const;
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void GetPairs(PairCallback callback, void* user_data) const;
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private:
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SAP_PairData mPairs;
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udword mNbObjects;
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SAP_Box* mBoxes;
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SAP_EndPoint* mList[3];
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// Internal methods
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bool CheckListsIntegrity();
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};
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#endif //__OPC_SWEEPANDPRUNE_H__
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