[1963] | 1 | /* |
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| 2 | Bullet Continuous Collision Detection and Physics Library |
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[7983] | 3 | Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org |
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[1963] | 4 | |
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| 5 | This software is provided 'as-is', without any express or implied warranty. |
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| 6 | In no event will the authors be held liable for any damages arising from the use of this software. |
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| 7 | Permission is granted to anyone to use this software for any purpose, |
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| 8 | including commercial applications, and to alter it and redistribute it freely, |
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| 9 | subject to the following restrictions: |
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| 10 | |
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| 11 | 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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| 12 | 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. |
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| 13 | 3. This notice may not be removed or altered from any source distribution. |
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| 14 | */ |
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| 15 | |
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[7983] | 16 | |
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[1963] | 17 | #include "btOptimizedBvh.h" |
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| 18 | #include "btStridingMeshInterface.h" |
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| 19 | #include "LinearMath/btAabbUtil2.h" |
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| 20 | #include "LinearMath/btIDebugDraw.h" |
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| 21 | |
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| 22 | |
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| 23 | btOptimizedBvh::btOptimizedBvh() |
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| 24 | { |
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| 25 | } |
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| 26 | |
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| 27 | btOptimizedBvh::~btOptimizedBvh() |
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| 28 | { |
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| 29 | } |
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| 30 | |
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| 31 | |
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| 32 | void btOptimizedBvh::build(btStridingMeshInterface* triangles, bool useQuantizedAabbCompression, const btVector3& bvhAabbMin, const btVector3& bvhAabbMax) |
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| 33 | { |
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| 34 | m_useQuantization = useQuantizedAabbCompression; |
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| 35 | |
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| 36 | |
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| 37 | // NodeArray triangleNodes; |
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| 38 | |
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| 39 | struct NodeTriangleCallback : public btInternalTriangleIndexCallback |
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| 40 | { |
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| 41 | |
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| 42 | NodeArray& m_triangleNodes; |
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| 43 | |
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| 44 | NodeTriangleCallback& operator=(NodeTriangleCallback& other) |
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| 45 | { |
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| 46 | m_triangleNodes = other.m_triangleNodes; |
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| 47 | return *this; |
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| 48 | } |
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| 49 | |
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| 50 | NodeTriangleCallback(NodeArray& triangleNodes) |
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| 51 | :m_triangleNodes(triangleNodes) |
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| 52 | { |
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| 53 | } |
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| 54 | |
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| 55 | virtual void internalProcessTriangleIndex(btVector3* triangle,int partId,int triangleIndex) |
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| 56 | { |
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| 57 | btOptimizedBvhNode node; |
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| 58 | btVector3 aabbMin,aabbMax; |
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[7983] | 59 | aabbMin.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); |
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| 60 | aabbMax.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); |
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[1963] | 61 | aabbMin.setMin(triangle[0]); |
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| 62 | aabbMax.setMax(triangle[0]); |
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| 63 | aabbMin.setMin(triangle[1]); |
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| 64 | aabbMax.setMax(triangle[1]); |
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| 65 | aabbMin.setMin(triangle[2]); |
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| 66 | aabbMax.setMax(triangle[2]); |
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| 67 | |
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| 68 | //with quantization? |
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| 69 | node.m_aabbMinOrg = aabbMin; |
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| 70 | node.m_aabbMaxOrg = aabbMax; |
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| 71 | |
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| 72 | node.m_escapeIndex = -1; |
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| 73 | |
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| 74 | //for child nodes |
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| 75 | node.m_subPart = partId; |
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| 76 | node.m_triangleIndex = triangleIndex; |
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| 77 | m_triangleNodes.push_back(node); |
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| 78 | } |
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| 79 | }; |
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| 80 | struct QuantizedNodeTriangleCallback : public btInternalTriangleIndexCallback |
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| 81 | { |
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| 82 | QuantizedNodeArray& m_triangleNodes; |
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| 83 | const btQuantizedBvh* m_optimizedTree; // for quantization |
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| 84 | |
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| 85 | QuantizedNodeTriangleCallback& operator=(QuantizedNodeTriangleCallback& other) |
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| 86 | { |
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| 87 | m_triangleNodes = other.m_triangleNodes; |
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| 88 | m_optimizedTree = other.m_optimizedTree; |
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| 89 | return *this; |
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| 90 | } |
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| 91 | |
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| 92 | QuantizedNodeTriangleCallback(QuantizedNodeArray& triangleNodes,const btQuantizedBvh* tree) |
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| 93 | :m_triangleNodes(triangleNodes),m_optimizedTree(tree) |
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| 94 | { |
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| 95 | } |
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| 96 | |
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| 97 | virtual void internalProcessTriangleIndex(btVector3* triangle,int partId,int triangleIndex) |
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| 98 | { |
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| 99 | // The partId and triangle index must fit in the same (positive) integer |
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| 100 | btAssert(partId < (1<<MAX_NUM_PARTS_IN_BITS)); |
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| 101 | btAssert(triangleIndex < (1<<(31-MAX_NUM_PARTS_IN_BITS))); |
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| 102 | //negative indices are reserved for escapeIndex |
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| 103 | btAssert(triangleIndex>=0); |
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| 104 | |
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| 105 | btQuantizedBvhNode node; |
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| 106 | btVector3 aabbMin,aabbMax; |
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[7983] | 107 | aabbMin.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); |
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| 108 | aabbMax.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); |
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[1963] | 109 | aabbMin.setMin(triangle[0]); |
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| 110 | aabbMax.setMax(triangle[0]); |
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| 111 | aabbMin.setMin(triangle[1]); |
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| 112 | aabbMax.setMax(triangle[1]); |
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| 113 | aabbMin.setMin(triangle[2]); |
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| 114 | aabbMax.setMax(triangle[2]); |
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| 115 | |
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| 116 | //PCK: add these checks for zero dimensions of aabb |
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| 117 | const btScalar MIN_AABB_DIMENSION = btScalar(0.002); |
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| 118 | const btScalar MIN_AABB_HALF_DIMENSION = btScalar(0.001); |
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| 119 | if (aabbMax.x() - aabbMin.x() < MIN_AABB_DIMENSION) |
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| 120 | { |
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| 121 | aabbMax.setX(aabbMax.x() + MIN_AABB_HALF_DIMENSION); |
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| 122 | aabbMin.setX(aabbMin.x() - MIN_AABB_HALF_DIMENSION); |
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| 123 | } |
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| 124 | if (aabbMax.y() - aabbMin.y() < MIN_AABB_DIMENSION) |
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| 125 | { |
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| 126 | aabbMax.setY(aabbMax.y() + MIN_AABB_HALF_DIMENSION); |
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| 127 | aabbMin.setY(aabbMin.y() - MIN_AABB_HALF_DIMENSION); |
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| 128 | } |
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| 129 | if (aabbMax.z() - aabbMin.z() < MIN_AABB_DIMENSION) |
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| 130 | { |
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| 131 | aabbMax.setZ(aabbMax.z() + MIN_AABB_HALF_DIMENSION); |
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| 132 | aabbMin.setZ(aabbMin.z() - MIN_AABB_HALF_DIMENSION); |
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| 133 | } |
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| 134 | |
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| 135 | m_optimizedTree->quantize(&node.m_quantizedAabbMin[0],aabbMin,0); |
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| 136 | m_optimizedTree->quantize(&node.m_quantizedAabbMax[0],aabbMax,1); |
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| 137 | |
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| 138 | node.m_escapeIndexOrTriangleIndex = (partId<<(31-MAX_NUM_PARTS_IN_BITS)) | triangleIndex; |
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| 139 | |
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| 140 | m_triangleNodes.push_back(node); |
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| 141 | } |
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| 142 | }; |
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| 143 | |
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| 144 | |
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| 145 | |
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| 146 | int numLeafNodes = 0; |
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| 147 | |
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| 148 | |
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| 149 | if (m_useQuantization) |
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| 150 | { |
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| 151 | |
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| 152 | //initialize quantization values |
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| 153 | setQuantizationValues(bvhAabbMin,bvhAabbMax); |
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| 154 | |
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| 155 | QuantizedNodeTriangleCallback callback(m_quantizedLeafNodes,this); |
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| 156 | |
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| 157 | |
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| 158 | triangles->InternalProcessAllTriangles(&callback,m_bvhAabbMin,m_bvhAabbMax); |
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| 159 | |
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| 160 | //now we have an array of leafnodes in m_leafNodes |
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| 161 | numLeafNodes = m_quantizedLeafNodes.size(); |
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| 162 | |
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| 163 | |
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| 164 | m_quantizedContiguousNodes.resize(2*numLeafNodes); |
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| 165 | |
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| 166 | |
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| 167 | } else |
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| 168 | { |
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| 169 | NodeTriangleCallback callback(m_leafNodes); |
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| 170 | |
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[7983] | 171 | btVector3 aabbMin(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); |
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| 172 | btVector3 aabbMax(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); |
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[1963] | 173 | |
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| 174 | triangles->InternalProcessAllTriangles(&callback,aabbMin,aabbMax); |
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| 175 | |
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| 176 | //now we have an array of leafnodes in m_leafNodes |
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| 177 | numLeafNodes = m_leafNodes.size(); |
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| 178 | |
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| 179 | m_contiguousNodes.resize(2*numLeafNodes); |
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| 180 | } |
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| 181 | |
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| 182 | m_curNodeIndex = 0; |
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| 183 | |
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| 184 | buildTree(0,numLeafNodes); |
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| 185 | |
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| 186 | ///if the entire tree is small then subtree size, we need to create a header info for the tree |
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| 187 | if(m_useQuantization && !m_SubtreeHeaders.size()) |
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| 188 | { |
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| 189 | btBvhSubtreeInfo& subtree = m_SubtreeHeaders.expand(); |
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| 190 | subtree.setAabbFromQuantizeNode(m_quantizedContiguousNodes[0]); |
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| 191 | subtree.m_rootNodeIndex = 0; |
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| 192 | subtree.m_subtreeSize = m_quantizedContiguousNodes[0].isLeafNode() ? 1 : m_quantizedContiguousNodes[0].getEscapeIndex(); |
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| 193 | } |
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| 194 | |
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| 195 | //PCK: update the copy of the size |
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| 196 | m_subtreeHeaderCount = m_SubtreeHeaders.size(); |
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| 197 | |
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| 198 | //PCK: clear m_quantizedLeafNodes and m_leafNodes, they are temporary |
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| 199 | m_quantizedLeafNodes.clear(); |
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| 200 | m_leafNodes.clear(); |
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| 201 | } |
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| 202 | |
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| 203 | |
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| 204 | |
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| 205 | |
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| 206 | void btOptimizedBvh::refit(btStridingMeshInterface* meshInterface,const btVector3& aabbMin,const btVector3& aabbMax) |
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| 207 | { |
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| 208 | if (m_useQuantization) |
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| 209 | { |
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| 210 | |
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| 211 | setQuantizationValues(aabbMin,aabbMax); |
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| 212 | |
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| 213 | updateBvhNodes(meshInterface,0,m_curNodeIndex,0); |
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| 214 | |
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| 215 | ///now update all subtree headers |
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| 216 | |
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| 217 | int i; |
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| 218 | for (i=0;i<m_SubtreeHeaders.size();i++) |
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| 219 | { |
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| 220 | btBvhSubtreeInfo& subtree = m_SubtreeHeaders[i]; |
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| 221 | subtree.setAabbFromQuantizeNode(m_quantizedContiguousNodes[subtree.m_rootNodeIndex]); |
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| 222 | } |
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| 223 | |
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| 224 | } else |
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| 225 | { |
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| 226 | |
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| 227 | } |
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| 228 | } |
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| 229 | |
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| 230 | |
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| 231 | |
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| 232 | |
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| 233 | void btOptimizedBvh::refitPartial(btStridingMeshInterface* meshInterface,const btVector3& aabbMin,const btVector3& aabbMax) |
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| 234 | { |
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| 235 | //incrementally initialize quantization values |
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| 236 | btAssert(m_useQuantization); |
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| 237 | |
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| 238 | btAssert(aabbMin.getX() > m_bvhAabbMin.getX()); |
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| 239 | btAssert(aabbMin.getY() > m_bvhAabbMin.getY()); |
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| 240 | btAssert(aabbMin.getZ() > m_bvhAabbMin.getZ()); |
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| 241 | |
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| 242 | btAssert(aabbMax.getX() < m_bvhAabbMax.getX()); |
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| 243 | btAssert(aabbMax.getY() < m_bvhAabbMax.getY()); |
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| 244 | btAssert(aabbMax.getZ() < m_bvhAabbMax.getZ()); |
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| 245 | |
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| 246 | ///we should update all quantization values, using updateBvhNodes(meshInterface); |
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| 247 | ///but we only update chunks that overlap the given aabb |
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| 248 | |
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| 249 | unsigned short quantizedQueryAabbMin[3]; |
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| 250 | unsigned short quantizedQueryAabbMax[3]; |
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| 251 | |
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| 252 | quantize(&quantizedQueryAabbMin[0],aabbMin,0); |
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| 253 | quantize(&quantizedQueryAabbMax[0],aabbMax,1); |
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| 254 | |
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| 255 | int i; |
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| 256 | for (i=0;i<this->m_SubtreeHeaders.size();i++) |
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| 257 | { |
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| 258 | btBvhSubtreeInfo& subtree = m_SubtreeHeaders[i]; |
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| 259 | |
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| 260 | //PCK: unsigned instead of bool |
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| 261 | unsigned overlap = testQuantizedAabbAgainstQuantizedAabb(quantizedQueryAabbMin,quantizedQueryAabbMax,subtree.m_quantizedAabbMin,subtree.m_quantizedAabbMax); |
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| 262 | if (overlap != 0) |
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| 263 | { |
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| 264 | updateBvhNodes(meshInterface,subtree.m_rootNodeIndex,subtree.m_rootNodeIndex+subtree.m_subtreeSize,i); |
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| 265 | |
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| 266 | subtree.setAabbFromQuantizeNode(m_quantizedContiguousNodes[subtree.m_rootNodeIndex]); |
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| 267 | } |
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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 | void btOptimizedBvh::updateBvhNodes(btStridingMeshInterface* meshInterface,int firstNode,int endNode,int index) |
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| 273 | { |
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| 274 | (void)index; |
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| 275 | |
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| 276 | btAssert(m_useQuantization); |
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| 277 | |
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| 278 | int curNodeSubPart=-1; |
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| 279 | |
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| 280 | //get access info to trianglemesh data |
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| 281 | const unsigned char *vertexbase = 0; |
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| 282 | int numverts = 0; |
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| 283 | PHY_ScalarType type = PHY_INTEGER; |
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| 284 | int stride = 0; |
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| 285 | const unsigned char *indexbase = 0; |
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| 286 | int indexstride = 0; |
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| 287 | int numfaces = 0; |
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| 288 | PHY_ScalarType indicestype = PHY_INTEGER; |
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| 289 | |
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| 290 | btVector3 triangleVerts[3]; |
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| 291 | btVector3 aabbMin,aabbMax; |
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| 292 | const btVector3& meshScaling = meshInterface->getScaling(); |
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| 293 | |
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| 294 | int i; |
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| 295 | for (i=endNode-1;i>=firstNode;i--) |
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| 296 | { |
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| 297 | |
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| 298 | |
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| 299 | btQuantizedBvhNode& curNode = m_quantizedContiguousNodes[i]; |
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| 300 | if (curNode.isLeafNode()) |
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| 301 | { |
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| 302 | //recalc aabb from triangle data |
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| 303 | int nodeSubPart = curNode.getPartId(); |
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| 304 | int nodeTriangleIndex = curNode.getTriangleIndex(); |
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| 305 | if (nodeSubPart != curNodeSubPart) |
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| 306 | { |
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| 307 | if (curNodeSubPart >= 0) |
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| 308 | meshInterface->unLockReadOnlyVertexBase(curNodeSubPart); |
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| 309 | meshInterface->getLockedReadOnlyVertexIndexBase(&vertexbase,numverts, type,stride,&indexbase,indexstride,numfaces,indicestype,nodeSubPart); |
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| 310 | |
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| 311 | curNodeSubPart = nodeSubPart; |
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| 312 | btAssert(indicestype==PHY_INTEGER||indicestype==PHY_SHORT); |
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| 313 | } |
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| 314 | //triangles->getLockedReadOnlyVertexIndexBase(vertexBase,numVerts, |
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| 315 | |
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| 316 | unsigned int* gfxbase = (unsigned int*)(indexbase+nodeTriangleIndex*indexstride); |
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| 317 | |
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| 318 | |
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| 319 | for (int j=2;j>=0;j--) |
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| 320 | { |
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| 321 | |
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| 322 | int graphicsindex = indicestype==PHY_SHORT?((unsigned short*)gfxbase)[j]:gfxbase[j]; |
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[2430] | 323 | if (type == PHY_FLOAT) |
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| 324 | { |
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| 325 | float* graphicsbase = (float*)(vertexbase+graphicsindex*stride); |
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| 326 | triangleVerts[j] = btVector3( |
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| 327 | graphicsbase[0]*meshScaling.getX(), |
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| 328 | graphicsbase[1]*meshScaling.getY(), |
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| 329 | graphicsbase[2]*meshScaling.getZ()); |
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| 330 | } |
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| 331 | else |
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| 332 | { |
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| 333 | double* graphicsbase = (double*)(vertexbase+graphicsindex*stride); |
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| 334 | triangleVerts[j] = btVector3( btScalar(graphicsbase[0]*meshScaling.getX()), btScalar(graphicsbase[1]*meshScaling.getY()), btScalar(graphicsbase[2]*meshScaling.getZ())); |
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| 335 | } |
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[1963] | 336 | } |
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| 337 | |
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| 338 | |
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| 339 | |
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[7983] | 340 | aabbMin.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); |
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| 341 | aabbMax.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); |
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[1963] | 342 | aabbMin.setMin(triangleVerts[0]); |
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| 343 | aabbMax.setMax(triangleVerts[0]); |
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| 344 | aabbMin.setMin(triangleVerts[1]); |
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| 345 | aabbMax.setMax(triangleVerts[1]); |
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| 346 | aabbMin.setMin(triangleVerts[2]); |
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| 347 | aabbMax.setMax(triangleVerts[2]); |
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| 348 | |
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| 349 | quantize(&curNode.m_quantizedAabbMin[0],aabbMin,0); |
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| 350 | quantize(&curNode.m_quantizedAabbMax[0],aabbMax,1); |
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| 351 | |
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| 352 | } else |
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| 353 | { |
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| 354 | //combine aabb from both children |
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| 355 | |
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| 356 | btQuantizedBvhNode* leftChildNode = &m_quantizedContiguousNodes[i+1]; |
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| 357 | |
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| 358 | btQuantizedBvhNode* rightChildNode = leftChildNode->isLeafNode() ? &m_quantizedContiguousNodes[i+2] : |
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| 359 | &m_quantizedContiguousNodes[i+1+leftChildNode->getEscapeIndex()]; |
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| 360 | |
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| 361 | |
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| 362 | { |
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| 363 | for (int i=0;i<3;i++) |
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| 364 | { |
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| 365 | curNode.m_quantizedAabbMin[i] = leftChildNode->m_quantizedAabbMin[i]; |
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| 366 | if (curNode.m_quantizedAabbMin[i]>rightChildNode->m_quantizedAabbMin[i]) |
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| 367 | curNode.m_quantizedAabbMin[i]=rightChildNode->m_quantizedAabbMin[i]; |
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| 368 | |
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| 369 | curNode.m_quantizedAabbMax[i] = leftChildNode->m_quantizedAabbMax[i]; |
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| 370 | if (curNode.m_quantizedAabbMax[i] < rightChildNode->m_quantizedAabbMax[i]) |
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| 371 | curNode.m_quantizedAabbMax[i] = rightChildNode->m_quantizedAabbMax[i]; |
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| 372 | } |
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| 373 | } |
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| 374 | } |
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| 375 | |
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| 376 | } |
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| 377 | |
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| 378 | if (curNodeSubPart >= 0) |
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| 379 | meshInterface->unLockReadOnlyVertexBase(curNodeSubPart); |
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| 380 | |
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| 381 | |
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| 382 | } |
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| 383 | |
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| 384 | ///deSerializeInPlace loads and initializes a BVH from a buffer in memory 'in place' |
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| 385 | btOptimizedBvh* btOptimizedBvh::deSerializeInPlace(void *i_alignedDataBuffer, unsigned int i_dataBufferSize, bool i_swapEndian) |
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| 386 | { |
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| 387 | btQuantizedBvh* bvh = btQuantizedBvh::deSerializeInPlace(i_alignedDataBuffer,i_dataBufferSize,i_swapEndian); |
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| 388 | |
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| 389 | //we don't add additional data so just do a static upcast |
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| 390 | return static_cast<btOptimizedBvh*>(bvh); |
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| 391 | } |
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