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authordan miller2007-10-19 05:20:07 +0000
committerdan miller2007-10-19 05:20:07 +0000
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1///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2/*
3 * OPCODE - Optimized Collision Detection
4 * Copyright (C) 2001 Pierre Terdiman
5 * Homepage: http://www.codercorner.com/Opcode.htm
6 */
7///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
8
9///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
10/**
11 * Contains an implementation of the sweep-and-prune algorithm (moved from Z-Collide)
12 * \file OPC_SweepAndPrune.h
13 * \author Pierre Terdiman
14 * \date January, 29, 2000
15 */
16///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
17
18///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
19// Include Guard
20#ifndef __OPC_SWEEPANDPRUNE_H__
21#define __OPC_SWEEPANDPRUNE_H__
22
23 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
24 /**
25 * User-callback, called by OPCODE for each colliding pairs.
26 * \param id0 [in] id of colliding object
27 * \param id1 [in] id of colliding object
28 * \param user_data [in] user-defined data
29 * \return TRUE to continue enumeration
30 */
31 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
32 typedef BOOL (*PairCallback) (udword id0, udword id1, void* user_data);
33
34 class SAP_Element;
35 class SAP_EndPoint;
36 class SAP_Box;
37
38 class OPCODE_API SAP_PairData
39 {
40 public:
41 SAP_PairData();
42 ~SAP_PairData();
43
44 bool Init(udword nb_objects);
45
46 void AddPair(udword id1, udword id2);
47 void RemovePair(udword id1, udword id2);
48
49 void DumpPairs(Pairs& pairs) const;
50 void DumpPairs(PairCallback callback, void* user_data) const;
51 private:
52 udword mNbElements; //!< Total number of elements in the pool
53 udword mNbUsedElements; //!< Number of used elements
54 SAP_Element* mElementPool; //!< Array of mNbElements elements
55 SAP_Element* mFirstFree; //!< First free element in the pool
56
57 udword mNbObjects; //!< Max number of objects we can handle
58 SAP_Element** mArray; //!< Pointers to pool
59 // Internal methods
60 SAP_Element* GetFreeElem(udword id, SAP_Element* next, udword* remap=null);
61 inline_ void FreeElem(SAP_Element* elem);
62 void Release();
63 };
64
65 class OPCODE_API SweepAndPrune
66 {
67 public:
68 SweepAndPrune();
69 ~SweepAndPrune();
70
71 bool Init(udword nb_objects, const AABB** boxes);
72 bool UpdateObject(udword i, const AABB& box);
73
74 void GetPairs(Pairs& pairs) const;
75 void GetPairs(PairCallback callback, void* user_data) const;
76 private:
77 SAP_PairData mPairs;
78
79 udword mNbObjects;
80 SAP_Box* mBoxes;
81 SAP_EndPoint* mList[3];
82 // Internal methods
83 bool CheckListsIntegrity();
84 };
85
86#endif //__OPC_SWEEPANDPRUNE_H__