[216] | 1 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 2 | /* |
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| 3 | * OPCODE - Optimized Collision Detection |
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| 4 | * Copyright (C) 2001 Pierre Terdiman |
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| 5 | * Homepage: http://www.codercorner.com/Opcode.htm |
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| 6 | */ |
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| 7 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 8 | |
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| 9 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 10 | /** |
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| 11 | * Contains code for a planes collider. |
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| 12 | * \file OPC_PlanesCollider.cpp |
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| 13 | * \author Pierre Terdiman |
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| 14 | * \date January, 1st, 2002 |
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| 15 | */ |
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| 16 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 17 | |
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| 18 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 19 | /** |
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| 20 | * Contains a Planes-vs-tree collider. |
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| 21 | * |
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| 22 | * \class PlanesCollider |
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| 23 | * \author Pierre Terdiman |
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| 24 | * \version 1.3 |
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| 25 | * \date January, 1st, 2002 |
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| 26 | */ |
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| 27 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 28 | |
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| 29 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 30 | // Precompiled Header |
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| 31 | #include "Stdafx.h" |
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| 32 | |
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| 33 | using namespace Opcode; |
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| 34 | |
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| 35 | #include "OPC_PlanesAABBOverlap.h" |
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| 36 | #include "OPC_PlanesTriOverlap.h" |
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| 37 | |
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| 38 | #define SET_CONTACT(prim_index, flag) \ |
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| 39 | /* Set contact status */ \ |
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| 40 | mFlags |= flag; \ |
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| 41 | mTouchedPrimitives->Add(udword(prim_index)); |
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| 42 | |
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| 43 | //! Planes-triangle test |
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| 44 | #define PLANES_PRIM(prim_index, flag) \ |
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| 45 | /* Request vertices from the app */ \ |
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| 46 | mIMesh->GetTriangle(mVP, prim_index); \ |
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| 47 | /* Perform triangle-box overlap test */ \ |
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| 48 | if(PlanesTriOverlap(clip_mask)) \ |
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| 49 | { \ |
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| 50 | SET_CONTACT(prim_index, flag) \ |
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| 51 | } |
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| 52 | |
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| 53 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 54 | /** |
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| 55 | * Constructor. |
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| 56 | */ |
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| 57 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 58 | PlanesCollider::PlanesCollider() : |
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| 59 | mPlanes (null), |
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| 60 | mNbPlanes (0) |
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| 61 | { |
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| 62 | } |
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| 63 | |
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| 64 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 65 | /** |
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| 66 | * Destructor. |
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| 67 | */ |
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| 68 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 69 | PlanesCollider::~PlanesCollider() |
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| 70 | { |
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| 71 | DELETEARRAY(mPlanes); |
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| 72 | } |
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| 73 | |
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| 74 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 75 | /** |
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| 76 | * Validates current settings. You should call this method after all the settings and callbacks have been defined. |
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| 77 | * \return null if everything is ok, else a string describing the problem |
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| 78 | */ |
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| 79 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 80 | const char* PlanesCollider::ValidateSettings() |
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| 81 | { |
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| 82 | if(TemporalCoherenceEnabled() && !FirstContactEnabled()) return "Temporal coherence only works with ""First contact"" mode!"; |
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| 83 | |
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| 84 | return VolumeCollider::ValidateSettings(); |
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| 85 | } |
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| 86 | |
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| 87 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 88 | /** |
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| 89 | * Generic collision query for generic OPCODE models. After the call, access the results: |
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| 90 | * - with GetContactStatus() |
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| 91 | * - with GetNbTouchedPrimitives() |
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| 92 | * - with GetTouchedPrimitives() |
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| 93 | * |
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| 94 | * \param cache [in/out] a planes cache |
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| 95 | * \param planes [in] list of planes in world space |
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| 96 | * \param nb_planes [in] number of planes |
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| 97 | * \param model [in] Opcode model to collide with |
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| 98 | * \param worldm [in] model's world matrix, or null |
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| 99 | * \return true if success |
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| 100 | * \warning SCALE NOT SUPPORTED. The matrices must contain rotation & translation parts only. |
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| 101 | */ |
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| 102 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 103 | bool PlanesCollider::Collide(PlanesCache& cache, const Plane* planes, udword nb_planes, const Model& model, const Matrix4x4* worldm) |
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| 104 | { |
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| 105 | // Checkings |
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| 106 | if(!Setup(&model)) return false; |
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| 107 | |
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| 108 | // Init collision query |
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| 109 | if(InitQuery(cache, planes, nb_planes, worldm)) return true; |
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| 110 | |
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| 111 | udword PlaneMask = (1<<nb_planes)-1; |
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| 112 | |
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| 113 | if(!model.HasLeafNodes()) |
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| 114 | { |
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| 115 | if(model.IsQuantized()) |
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| 116 | { |
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| 117 | const AABBQuantizedNoLeafTree* Tree = (const AABBQuantizedNoLeafTree*)model.GetTree(); |
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| 118 | |
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| 119 | // Setup dequantization coeffs |
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| 120 | mCenterCoeff = Tree->mCenterCoeff; |
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| 121 | mExtentsCoeff = Tree->mExtentsCoeff; |
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| 122 | |
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| 123 | // Perform collision query |
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| 124 | if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 125 | else _Collide(Tree->GetNodes(), PlaneMask); |
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| 126 | } |
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| 127 | else |
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| 128 | { |
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| 129 | const AABBNoLeafTree* Tree = (const AABBNoLeafTree*)model.GetTree(); |
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| 130 | |
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| 131 | // Perform collision query |
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| 132 | if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 133 | else _Collide(Tree->GetNodes(), PlaneMask); |
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| 134 | } |
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| 135 | } |
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| 136 | else |
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| 137 | { |
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| 138 | if(model.IsQuantized()) |
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| 139 | { |
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| 140 | const AABBQuantizedTree* Tree = (const AABBQuantizedTree*)model.GetTree(); |
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| 141 | |
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| 142 | // Setup dequantization coeffs |
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| 143 | mCenterCoeff = Tree->mCenterCoeff; |
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| 144 | mExtentsCoeff = Tree->mExtentsCoeff; |
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| 145 | |
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| 146 | // Perform collision query |
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| 147 | if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 148 | else _Collide(Tree->GetNodes(), PlaneMask); |
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| 149 | } |
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| 150 | else |
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| 151 | { |
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| 152 | const AABBCollisionTree* Tree = (const AABBCollisionTree*)model.GetTree(); |
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| 153 | |
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| 154 | // Perform collision query |
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| 155 | if(SkipPrimitiveTests()) _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 156 | else _Collide(Tree->GetNodes(), PlaneMask); |
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| 157 | } |
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| 158 | } |
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| 159 | return true; |
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| 160 | } |
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| 161 | |
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| 162 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 163 | /** |
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| 164 | * Initializes a collision query : |
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| 165 | * - reset stats & contact status |
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| 166 | * - compute planes in model space |
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| 167 | * - check temporal coherence |
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| 168 | * |
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| 169 | * \param cache [in/out] a planes cache |
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| 170 | * \param planes [in] list of planes |
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| 171 | * \param nb_planes [in] number of planes |
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| 172 | * \param worldm [in] model's world matrix, or null |
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| 173 | * \return TRUE if we can return immediately |
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| 174 | * \warning SCALE NOT SUPPORTED. The matrix must contain rotation & translation parts only. |
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| 175 | */ |
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| 176 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 177 | BOOL PlanesCollider::InitQuery(PlanesCache& cache, const Plane* planes, udword nb_planes, const Matrix4x4* worldm) |
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| 178 | { |
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| 179 | // 1) Call the base method |
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| 180 | VolumeCollider::InitQuery(); |
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| 181 | |
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| 182 | // 2) Compute planes in model space |
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| 183 | if(nb_planes>mNbPlanes) |
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| 184 | { |
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| 185 | DELETEARRAY(mPlanes); |
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| 186 | mPlanes = new Plane[nb_planes]; |
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| 187 | } |
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| 188 | mNbPlanes = nb_planes; |
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| 189 | |
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| 190 | if(worldm) |
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| 191 | { |
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| 192 | Matrix4x4 InvWorldM; |
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| 193 | InvertPRMatrix(InvWorldM, *worldm); |
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| 194 | |
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| 195 | // for(udword i=0;i<nb_planes;i++) mPlanes[i] = planes[i] * InvWorldM; |
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| 196 | for(udword i=0;i<nb_planes;i++) TransformPlane(mPlanes[i], planes[i], InvWorldM); |
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| 197 | } |
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| 198 | else CopyMemory(mPlanes, planes, nb_planes*sizeof(Plane)); |
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| 199 | |
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| 200 | // 3) Setup destination pointer |
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| 201 | mTouchedPrimitives = &cache.TouchedPrimitives; |
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| 202 | |
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| 203 | // 4) Special case: 1-triangle meshes [Opcode 1.3] |
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| 204 | if(mCurrentModel && mCurrentModel->HasSingleNode()) |
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| 205 | { |
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| 206 | if(!SkipPrimitiveTests()) |
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| 207 | { |
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| 208 | // We simply perform the BV-Prim overlap test each time. We assume single triangle has index 0. |
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| 209 | mTouchedPrimitives->Reset(); |
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| 210 | |
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| 211 | // Perform overlap test between the unique triangle and the planes (and set contact status if needed) |
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| 212 | udword clip_mask = (1<<mNbPlanes)-1; |
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| 213 | PLANES_PRIM(udword(0), OPC_CONTACT) |
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| 214 | |
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| 215 | // Return immediately regardless of status |
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| 216 | return TRUE; |
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| 217 | } |
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| 218 | } |
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| 219 | |
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| 220 | // 4) Check temporal coherence: |
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| 221 | if(TemporalCoherenceEnabled()) |
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| 222 | { |
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| 223 | // Here we use temporal coherence |
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| 224 | // => check results from previous frame before performing the collision query |
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| 225 | if(FirstContactEnabled()) |
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| 226 | { |
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| 227 | // We're only interested in the first contact found => test the unique previously touched face |
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| 228 | if(mTouchedPrimitives->GetNbEntries()) |
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| 229 | { |
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| 230 | // Get index of previously touched face = the first entry in the array |
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| 231 | udword PreviouslyTouchedFace = mTouchedPrimitives->GetEntry(0); |
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| 232 | |
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| 233 | // Then reset the array: |
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| 234 | // - if the overlap test below is successful, the index we'll get added back anyway |
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| 235 | // - if it isn't, then the array should be reset anyway for the normal query |
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| 236 | mTouchedPrimitives->Reset(); |
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| 237 | |
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| 238 | // Perform overlap test between the cached triangle and the planes (and set contact status if needed) |
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| 239 | udword clip_mask = (1<<mNbPlanes)-1; |
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| 240 | PLANES_PRIM(PreviouslyTouchedFace, OPC_TEMPORAL_CONTACT) |
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| 241 | |
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| 242 | // Return immediately if possible |
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| 243 | if(GetContactStatus()) return TRUE; |
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| 244 | } |
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| 245 | // else no face has been touched during previous query |
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| 246 | // => we'll have to perform a normal query |
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| 247 | } |
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| 248 | else mTouchedPrimitives->Reset(); |
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| 249 | } |
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| 250 | else |
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| 251 | { |
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| 252 | // Here we don't use temporal coherence => do a normal query |
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| 253 | mTouchedPrimitives->Reset(); |
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| 254 | } |
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| 255 | |
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| 256 | return FALSE; |
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| 257 | } |
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| 258 | |
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| 259 | #define TEST_CLIP_MASK \ |
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| 260 | /* If the box is completely included, so are its children. We don't need to do extra tests, we */ \ |
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| 261 | /* can immediately output a list of visible children. Those ones won't need to be clipped. */ \ |
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| 262 | if(!OutClipMask) \ |
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| 263 | { \ |
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| 264 | /* Set contact status */ \ |
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| 265 | mFlags |= OPC_CONTACT; \ |
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| 266 | _Dump(node); \ |
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| 267 | return; \ |
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| 268 | } |
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| 269 | |
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| 270 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 271 | /** |
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| 272 | * Recursive collision query for normal AABB trees. |
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| 273 | * \param node [in] current collision node |
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| 274 | */ |
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| 275 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 276 | void PlanesCollider::_Collide(const AABBCollisionNode* node, udword clip_mask) |
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| 277 | { |
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| 278 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 279 | udword OutClipMask; |
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| 280 | if(!PlanesAABBOverlap(node->mAABB.mCenter, node->mAABB.mExtents, OutClipMask, clip_mask)) return; |
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| 281 | |
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| 282 | TEST_CLIP_MASK |
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| 283 | |
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| 284 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 285 | if(node->IsLeaf()) |
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| 286 | { |
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| 287 | PLANES_PRIM(node->GetPrimitive(), OPC_CONTACT) |
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| 288 | } |
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| 289 | else |
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| 290 | { |
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| 291 | _Collide(node->GetPos(), OutClipMask); |
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| 292 | |
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| 293 | if(ContactFound()) return; |
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| 294 | |
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| 295 | _Collide(node->GetNeg(), OutClipMask); |
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| 296 | } |
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| 297 | } |
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| 298 | |
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| 299 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 300 | /** |
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| 301 | * Recursive collision query for normal AABB trees. |
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| 302 | * \param node [in] current collision node |
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| 303 | */ |
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| 304 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 305 | void PlanesCollider::_CollideNoPrimitiveTest(const AABBCollisionNode* node, udword clip_mask) |
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| 306 | { |
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| 307 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 308 | udword OutClipMask; |
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| 309 | if(!PlanesAABBOverlap(node->mAABB.mCenter, node->mAABB.mExtents, OutClipMask, clip_mask)) return; |
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| 310 | |
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| 311 | TEST_CLIP_MASK |
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| 312 | |
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| 313 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 314 | if(node->IsLeaf()) |
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| 315 | { |
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| 316 | SET_CONTACT(node->GetPrimitive(), OPC_CONTACT) |
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| 317 | } |
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| 318 | else |
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| 319 | { |
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| 320 | _CollideNoPrimitiveTest(node->GetPos(), OutClipMask); |
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| 321 | |
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| 322 | if(ContactFound()) return; |
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| 323 | |
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| 324 | _CollideNoPrimitiveTest(node->GetNeg(), OutClipMask); |
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| 325 | } |
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| 326 | } |
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| 327 | |
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| 328 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 329 | /** |
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| 330 | * Recursive collision query for quantized AABB trees. |
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| 331 | * \param node [in] current collision node |
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| 332 | */ |
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| 333 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 334 | void PlanesCollider::_Collide(const AABBQuantizedNode* node, udword clip_mask) |
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| 335 | { |
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| 336 | // Dequantize box |
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| 337 | const QuantizedAABB& Box = node->mAABB; |
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| 338 | const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z); |
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| 339 | const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z); |
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| 340 | |
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| 341 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 342 | udword OutClipMask; |
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| 343 | if(!PlanesAABBOverlap(Center, Extents, OutClipMask, clip_mask)) return; |
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| 344 | |
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| 345 | TEST_CLIP_MASK |
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| 346 | |
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| 347 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 348 | if(node->IsLeaf()) |
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| 349 | { |
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| 350 | PLANES_PRIM(node->GetPrimitive(), OPC_CONTACT) |
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| 351 | } |
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| 352 | else |
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| 353 | { |
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| 354 | _Collide(node->GetPos(), OutClipMask); |
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| 355 | |
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| 356 | if(ContactFound()) return; |
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| 357 | |
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| 358 | _Collide(node->GetNeg(), OutClipMask); |
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| 359 | } |
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| 360 | } |
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| 361 | |
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| 362 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 363 | /** |
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| 364 | * Recursive collision query for quantized AABB trees. |
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| 365 | * \param node [in] current collision node |
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| 366 | */ |
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| 367 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 368 | void PlanesCollider::_CollideNoPrimitiveTest(const AABBQuantizedNode* node, udword clip_mask) |
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| 369 | { |
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| 370 | // Dequantize box |
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| 371 | const QuantizedAABB& Box = node->mAABB; |
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| 372 | const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z); |
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| 373 | const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z); |
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| 374 | |
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| 375 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 376 | udword OutClipMask; |
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| 377 | if(!PlanesAABBOverlap(Center, Extents, OutClipMask, clip_mask)) return; |
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| 378 | |
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| 379 | TEST_CLIP_MASK |
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| 380 | |
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| 381 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 382 | if(node->IsLeaf()) |
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| 383 | { |
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| 384 | SET_CONTACT(node->GetPrimitive(), OPC_CONTACT) |
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| 385 | } |
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| 386 | else |
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| 387 | { |
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| 388 | _CollideNoPrimitiveTest(node->GetPos(), OutClipMask); |
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| 389 | |
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| 390 | if(ContactFound()) return; |
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| 391 | |
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| 392 | _CollideNoPrimitiveTest(node->GetNeg(), OutClipMask); |
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| 393 | } |
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| 394 | } |
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| 395 | |
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| 396 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 397 | /** |
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| 398 | * Recursive collision query for no-leaf AABB trees. |
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| 399 | * \param node [in] current collision node |
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| 400 | */ |
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| 401 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 402 | void PlanesCollider::_Collide(const AABBNoLeafNode* node, udword clip_mask) |
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| 403 | { |
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| 404 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 405 | udword OutClipMask; |
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| 406 | if(!PlanesAABBOverlap(node->mAABB.mCenter, node->mAABB.mExtents, OutClipMask, clip_mask)) return; |
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| 407 | |
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| 408 | TEST_CLIP_MASK |
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| 409 | |
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| 410 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 411 | if(node->HasPosLeaf()) { PLANES_PRIM(node->GetPosPrimitive(), OPC_CONTACT) } |
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| 412 | else _Collide(node->GetPos(), OutClipMask); |
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| 413 | |
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| 414 | if(ContactFound()) return; |
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| 415 | |
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| 416 | if(node->HasNegLeaf()) { PLANES_PRIM(node->GetNegPrimitive(), OPC_CONTACT) } |
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| 417 | else _Collide(node->GetNeg(), OutClipMask); |
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| 418 | } |
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| 419 | |
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| 420 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 421 | /** |
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| 422 | * Recursive collision query for no-leaf AABB trees. |
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| 423 | * \param node [in] current collision node |
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| 424 | */ |
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| 425 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 426 | void PlanesCollider::_CollideNoPrimitiveTest(const AABBNoLeafNode* node, udword clip_mask) |
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| 427 | { |
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| 428 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 429 | udword OutClipMask; |
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| 430 | if(!PlanesAABBOverlap(node->mAABB.mCenter, node->mAABB.mExtents, OutClipMask, clip_mask)) return; |
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| 431 | |
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| 432 | TEST_CLIP_MASK |
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| 433 | |
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| 434 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 435 | if(node->HasPosLeaf()) { SET_CONTACT(node->GetPosPrimitive(), OPC_CONTACT) } |
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| 436 | else _CollideNoPrimitiveTest(node->GetPos(), OutClipMask); |
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| 437 | |
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| 438 | if(ContactFound()) return; |
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| 439 | |
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| 440 | if(node->HasNegLeaf()) { SET_CONTACT(node->GetNegPrimitive(), OPC_CONTACT) } |
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| 441 | else _CollideNoPrimitiveTest(node->GetNeg(), OutClipMask); |
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| 442 | } |
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| 443 | |
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| 444 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 445 | /** |
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| 446 | * Recursive collision query for quantized no-leaf AABB trees. |
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| 447 | * \param node [in] current collision node |
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| 448 | */ |
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| 449 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 450 | void PlanesCollider::_Collide(const AABBQuantizedNoLeafNode* node, udword clip_mask) |
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| 451 | { |
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| 452 | // Dequantize box |
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| 453 | const QuantizedAABB& Box = node->mAABB; |
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| 454 | const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z); |
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| 455 | const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z); |
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| 456 | |
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| 457 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 458 | udword OutClipMask; |
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| 459 | if(!PlanesAABBOverlap(Center, Extents, OutClipMask, clip_mask)) return; |
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| 460 | |
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| 461 | TEST_CLIP_MASK |
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| 462 | |
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| 463 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 464 | if(node->HasPosLeaf()) { PLANES_PRIM(node->GetPosPrimitive(), OPC_CONTACT) } |
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| 465 | else _Collide(node->GetPos(), OutClipMask); |
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| 466 | |
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| 467 | if(ContactFound()) return; |
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| 468 | |
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| 469 | if(node->HasNegLeaf()) { PLANES_PRIM(node->GetNegPrimitive(), OPC_CONTACT) } |
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| 470 | else _Collide(node->GetNeg(), OutClipMask); |
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| 471 | } |
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| 472 | |
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| 473 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 474 | /** |
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| 475 | * Recursive collision query for quantized no-leaf AABB trees. |
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| 476 | * \param node [in] current collision node |
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| 477 | */ |
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| 478 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 479 | void PlanesCollider::_CollideNoPrimitiveTest(const AABBQuantizedNoLeafNode* node, udword clip_mask) |
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| 480 | { |
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| 481 | // Dequantize box |
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| 482 | const QuantizedAABB& Box = node->mAABB; |
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| 483 | const Point Center(float(Box.mCenter[0]) * mCenterCoeff.x, float(Box.mCenter[1]) * mCenterCoeff.y, float(Box.mCenter[2]) * mCenterCoeff.z); |
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| 484 | const Point Extents(float(Box.mExtents[0]) * mExtentsCoeff.x, float(Box.mExtents[1]) * mExtentsCoeff.y, float(Box.mExtents[2]) * mExtentsCoeff.z); |
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| 485 | |
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| 486 | // Test the box against the planes. If the box is completely culled, so are its children, hence we exit. |
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| 487 | udword OutClipMask; |
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| 488 | if(!PlanesAABBOverlap(Center, Extents, OutClipMask, clip_mask)) return; |
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| 489 | |
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| 490 | TEST_CLIP_MASK |
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| 491 | |
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| 492 | // Else the box straddles one or several planes, so we need to recurse down the tree. |
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| 493 | if(node->HasPosLeaf()) { SET_CONTACT(node->GetPosPrimitive(), OPC_CONTACT) } |
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| 494 | else _CollideNoPrimitiveTest(node->GetPos(), OutClipMask); |
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| 495 | |
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| 496 | if(ContactFound()) return; |
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| 497 | |
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| 498 | if(node->HasNegLeaf()) { SET_CONTACT(node->GetNegPrimitive(), OPC_CONTACT) } |
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| 499 | else _CollideNoPrimitiveTest(node->GetNeg(), OutClipMask); |
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| 500 | } |
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| 501 | |
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| 502 | |
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| 503 | |
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| 504 | |
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| 505 | |
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| 506 | |
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| 507 | |
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| 508 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 509 | /** |
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| 510 | * Constructor. |
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| 511 | */ |
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| 512 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 513 | HybridPlanesCollider::HybridPlanesCollider() |
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| 514 | { |
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| 515 | } |
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| 516 | |
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| 517 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 518 | /** |
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| 519 | * Destructor. |
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| 520 | */ |
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| 521 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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| 522 | HybridPlanesCollider::~HybridPlanesCollider() |
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| 523 | { |
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| 524 | } |
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| 525 | |
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| 526 | bool HybridPlanesCollider::Collide(PlanesCache& cache, const Plane* planes, udword nb_planes, const HybridModel& model, const Matrix4x4* worldm) |
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| 527 | { |
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| 528 | // We don't want primitive tests here! |
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| 529 | mFlags |= OPC_NO_PRIMITIVE_TESTS; |
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| 530 | |
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| 531 | // Checkings |
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| 532 | if(!Setup(&model)) return false; |
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| 533 | |
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| 534 | // Init collision query |
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| 535 | if(InitQuery(cache, planes, nb_planes, worldm)) return true; |
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| 536 | |
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| 537 | // Special case for 1-leaf trees |
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| 538 | if(mCurrentModel && mCurrentModel->HasSingleNode()) |
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| 539 | { |
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| 540 | // Here we're supposed to perform a normal query, except our tree has a single node, i.e. just a few triangles |
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| 541 | udword Nb = mIMesh->GetNbTriangles(); |
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| 542 | |
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| 543 | // Loop through all triangles |
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| 544 | udword clip_mask = (1<<mNbPlanes)-1; |
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| 545 | for(udword i=0;i<Nb;i++) |
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| 546 | { |
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| 547 | PLANES_PRIM(i, OPC_CONTACT) |
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| 548 | } |
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| 549 | return true; |
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| 550 | } |
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| 551 | |
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| 552 | // Override destination array since we're only going to get leaf boxes here |
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| 553 | mTouchedBoxes.Reset(); |
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| 554 | mTouchedPrimitives = &mTouchedBoxes; |
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| 555 | |
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| 556 | udword PlaneMask = (1<<nb_planes)-1; |
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| 557 | |
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| 558 | // Now, do the actual query against leaf boxes |
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| 559 | if(!model.HasLeafNodes()) |
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| 560 | { |
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| 561 | if(model.IsQuantized()) |
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| 562 | { |
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| 563 | const AABBQuantizedNoLeafTree* Tree = (const AABBQuantizedNoLeafTree*)model.GetTree(); |
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| 564 | |
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| 565 | // Setup dequantization coeffs |
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| 566 | mCenterCoeff = Tree->mCenterCoeff; |
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| 567 | mExtentsCoeff = Tree->mExtentsCoeff; |
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| 568 | |
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| 569 | // Perform collision query - we don't want primitive tests here! |
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| 570 | _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 571 | } |
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| 572 | else |
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| 573 | { |
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| 574 | const AABBNoLeafTree* Tree = (const AABBNoLeafTree*)model.GetTree(); |
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| 575 | |
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| 576 | // Perform collision query - we don't want primitive tests here! |
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| 577 | _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 578 | } |
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| 579 | } |
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| 580 | else |
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| 581 | { |
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| 582 | if(model.IsQuantized()) |
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| 583 | { |
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| 584 | const AABBQuantizedTree* Tree = (const AABBQuantizedTree*)model.GetTree(); |
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| 585 | |
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| 586 | // Setup dequantization coeffs |
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| 587 | mCenterCoeff = Tree->mCenterCoeff; |
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| 588 | mExtentsCoeff = Tree->mExtentsCoeff; |
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| 589 | |
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| 590 | // Perform collision query - we don't want primitive tests here! |
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| 591 | _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 592 | } |
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| 593 | else |
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| 594 | { |
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| 595 | const AABBCollisionTree* Tree = (const AABBCollisionTree*)model.GetTree(); |
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| 596 | |
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| 597 | // Perform collision query - we don't want primitive tests here! |
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| 598 | _CollideNoPrimitiveTest(Tree->GetNodes(), PlaneMask); |
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| 599 | } |
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| 600 | } |
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| 601 | |
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| 602 | // We only have a list of boxes so far |
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| 603 | if(GetContactStatus()) |
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| 604 | { |
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| 605 | // Reset contact status, since it currently only reflects collisions with leaf boxes |
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| 606 | Collider::InitQuery(); |
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| 607 | |
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| 608 | // Change dest container so that we can use built-in overlap tests and get collided primitives |
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| 609 | cache.TouchedPrimitives.Reset(); |
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| 610 | mTouchedPrimitives = &cache.TouchedPrimitives; |
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| 611 | |
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| 612 | // Read touched leaf boxes |
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| 613 | udword Nb = mTouchedBoxes.GetNbEntries(); |
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| 614 | const udword* Touched = mTouchedBoxes.GetEntries(); |
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| 615 | |
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| 616 | const LeafTriangles* LT = model.GetLeafTriangles(); |
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| 617 | const udword* Indices = model.GetIndices(); |
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| 618 | |
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| 619 | // Loop through touched leaves |
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| 620 | udword clip_mask = (1<<mNbPlanes)-1; |
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| 621 | while(Nb--) |
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| 622 | { |
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| 623 | const LeafTriangles& CurrentLeaf = LT[*Touched++]; |
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| 624 | |
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| 625 | // Each leaf box has a set of triangles |
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| 626 | udword NbTris = CurrentLeaf.GetNbTriangles(); |
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| 627 | if(Indices) |
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| 628 | { |
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| 629 | const udword* T = &Indices[CurrentLeaf.GetTriangleIndex()]; |
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| 630 | |
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| 631 | // Loop through triangles and test each of them |
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| 632 | while(NbTris--) |
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| 633 | { |
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| 634 | udword TriangleIndex = *T++; |
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| 635 | PLANES_PRIM(TriangleIndex, OPC_CONTACT) |
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| 636 | } |
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| 637 | } |
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| 638 | else |
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| 639 | { |
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| 640 | udword BaseIndex = CurrentLeaf.GetTriangleIndex(); |
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| 641 | |
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| 642 | // Loop through triangles and test each of them |
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| 643 | while(NbTris--) |
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| 644 | { |
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| 645 | udword TriangleIndex = BaseIndex++; |
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| 646 | PLANES_PRIM(TriangleIndex, OPC_CONTACT) |
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| 647 | } |
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| 648 | } |
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| 649 | } |
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| 650 | } |
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| 651 | |
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| 652 | return true; |
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| 653 | } |
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