1 | /* |
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2 | Bullet Continuous Collision Detection and Physics Library |
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3 | Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org |
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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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16 | #include "btStridingMeshInterface.h" |
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17 | #include "LinearMath/btSerializer.h" |
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18 | |
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19 | btStridingMeshInterface::~btStridingMeshInterface() |
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20 | { |
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21 | |
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22 | } |
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23 | |
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24 | |
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25 | void btStridingMeshInterface::InternalProcessAllTriangles(btInternalTriangleIndexCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const |
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26 | { |
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27 | (void)aabbMin; |
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28 | (void)aabbMax; |
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29 | int numtotalphysicsverts = 0; |
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30 | int part,graphicssubparts = getNumSubParts(); |
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31 | const unsigned char * vertexbase; |
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32 | const unsigned char * indexbase; |
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33 | int indexstride; |
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34 | PHY_ScalarType type; |
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35 | PHY_ScalarType gfxindextype; |
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36 | int stride,numverts,numtriangles; |
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37 | int gfxindex; |
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38 | btVector3 triangle[3]; |
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39 | |
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40 | btVector3 meshScaling = getScaling(); |
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41 | |
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42 | ///if the number of parts is big, the performance might drop due to the innerloop switch on indextype |
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43 | for (part=0;part<graphicssubparts ;part++) |
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44 | { |
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45 | getLockedReadOnlyVertexIndexBase(&vertexbase,numverts,type,stride,&indexbase,indexstride,numtriangles,gfxindextype,part); |
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46 | numtotalphysicsverts+=numtriangles*3; //upper bound |
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47 | |
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48 | ///unlike that developers want to pass in double-precision meshes in single-precision Bullet build |
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49 | ///so disable this feature by default |
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50 | ///see patch http://code.google.com/p/bullet/issues/detail?id=213 |
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51 | |
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52 | switch (type) |
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53 | { |
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54 | case PHY_FLOAT: |
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55 | { |
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56 | |
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57 | float* graphicsbase; |
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58 | |
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59 | switch (gfxindextype) |
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60 | { |
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61 | case PHY_INTEGER: |
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62 | { |
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63 | for (gfxindex=0;gfxindex<numtriangles;gfxindex++) |
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64 | { |
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65 | unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride); |
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66 | graphicsbase = (float*)(vertexbase+tri_indices[0]*stride); |
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67 | triangle[0].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),graphicsbase[2]*meshScaling.getZ()); |
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68 | graphicsbase = (float*)(vertexbase+tri_indices[1]*stride); |
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69 | triangle[1].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ()); |
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70 | graphicsbase = (float*)(vertexbase+tri_indices[2]*stride); |
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71 | triangle[2].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ()); |
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72 | callback->internalProcessTriangleIndex(triangle,part,gfxindex); |
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73 | } |
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74 | break; |
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75 | } |
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76 | case PHY_SHORT: |
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77 | { |
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78 | for (gfxindex=0;gfxindex<numtriangles;gfxindex++) |
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79 | { |
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80 | unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride); |
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81 | graphicsbase = (float*)(vertexbase+tri_indices[0]*stride); |
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82 | triangle[0].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(),graphicsbase[2]*meshScaling.getZ()); |
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83 | graphicsbase = (float*)(vertexbase+tri_indices[1]*stride); |
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84 | triangle[1].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ()); |
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85 | graphicsbase = (float*)(vertexbase+tri_indices[2]*stride); |
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86 | triangle[2].setValue(graphicsbase[0]*meshScaling.getX(),graphicsbase[1]*meshScaling.getY(), graphicsbase[2]*meshScaling.getZ()); |
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87 | callback->internalProcessTriangleIndex(triangle,part,gfxindex); |
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88 | } |
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89 | break; |
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90 | } |
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91 | default: |
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92 | btAssert((gfxindextype == PHY_INTEGER) || (gfxindextype == PHY_SHORT)); |
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93 | } |
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94 | break; |
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95 | } |
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96 | |
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97 | case PHY_DOUBLE: |
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98 | { |
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99 | double* graphicsbase; |
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100 | |
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101 | switch (gfxindextype) |
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102 | { |
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103 | case PHY_INTEGER: |
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104 | { |
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105 | for (gfxindex=0;gfxindex<numtriangles;gfxindex++) |
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106 | { |
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107 | unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride); |
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108 | graphicsbase = (double*)(vertexbase+tri_indices[0]*stride); |
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109 | triangle[0].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(),(btScalar)graphicsbase[2]*meshScaling.getZ()); |
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110 | graphicsbase = (double*)(vertexbase+tri_indices[1]*stride); |
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111 | triangle[1].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ()); |
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112 | graphicsbase = (double*)(vertexbase+tri_indices[2]*stride); |
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113 | triangle[2].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ()); |
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114 | callback->internalProcessTriangleIndex(triangle,part,gfxindex); |
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115 | } |
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116 | break; |
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117 | } |
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118 | case PHY_SHORT: |
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119 | { |
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120 | for (gfxindex=0;gfxindex<numtriangles;gfxindex++) |
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121 | { |
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122 | unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride); |
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123 | graphicsbase = (double*)(vertexbase+tri_indices[0]*stride); |
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124 | triangle[0].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(),(btScalar)graphicsbase[2]*meshScaling.getZ()); |
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125 | graphicsbase = (double*)(vertexbase+tri_indices[1]*stride); |
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126 | triangle[1].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ()); |
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127 | graphicsbase = (double*)(vertexbase+tri_indices[2]*stride); |
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128 | triangle[2].setValue((btScalar)graphicsbase[0]*meshScaling.getX(),(btScalar)graphicsbase[1]*meshScaling.getY(), (btScalar)graphicsbase[2]*meshScaling.getZ()); |
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129 | callback->internalProcessTriangleIndex(triangle,part,gfxindex); |
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130 | } |
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131 | break; |
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132 | } |
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133 | default: |
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134 | btAssert((gfxindextype == PHY_INTEGER) || (gfxindextype == PHY_SHORT)); |
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135 | } |
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136 | break; |
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137 | } |
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138 | default: |
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139 | btAssert((type == PHY_FLOAT) || (type == PHY_DOUBLE)); |
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140 | } |
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141 | |
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142 | unLockReadOnlyVertexBase(part); |
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143 | } |
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144 | } |
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145 | |
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146 | void btStridingMeshInterface::calculateAabbBruteForce(btVector3& aabbMin,btVector3& aabbMax) |
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147 | { |
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148 | |
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149 | struct AabbCalculationCallback : public btInternalTriangleIndexCallback |
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150 | { |
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151 | btVector3 m_aabbMin; |
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152 | btVector3 m_aabbMax; |
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153 | |
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154 | AabbCalculationCallback() |
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155 | { |
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156 | m_aabbMin.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); |
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157 | m_aabbMax.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); |
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158 | } |
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159 | |
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160 | virtual void internalProcessTriangleIndex(btVector3* triangle,int partId,int triangleIndex) |
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161 | { |
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162 | (void)partId; |
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163 | (void)triangleIndex; |
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164 | |
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165 | m_aabbMin.setMin(triangle[0]); |
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166 | m_aabbMax.setMax(triangle[0]); |
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167 | m_aabbMin.setMin(triangle[1]); |
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168 | m_aabbMax.setMax(triangle[1]); |
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169 | m_aabbMin.setMin(triangle[2]); |
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170 | m_aabbMax.setMax(triangle[2]); |
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171 | } |
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172 | }; |
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173 | |
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174 | //first calculate the total aabb for all triangles |
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175 | AabbCalculationCallback aabbCallback; |
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176 | aabbMin.setValue(btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT),btScalar(-BT_LARGE_FLOAT)); |
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177 | aabbMax.setValue(btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT),btScalar(BT_LARGE_FLOAT)); |
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178 | InternalProcessAllTriangles(&aabbCallback,aabbMin,aabbMax); |
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179 | |
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180 | aabbMin = aabbCallback.m_aabbMin; |
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181 | aabbMax = aabbCallback.m_aabbMax; |
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182 | } |
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183 | |
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184 | |
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185 | |
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186 | ///fills the dataBuffer and returns the struct name (and 0 on failure) |
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187 | const char* btStridingMeshInterface::serialize(void* dataBuffer, btSerializer* serializer) const |
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188 | { |
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189 | btStridingMeshInterfaceData* trimeshData = (btStridingMeshInterfaceData*) dataBuffer; |
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190 | |
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191 | trimeshData->m_numMeshParts = getNumSubParts(); |
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192 | |
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193 | //void* uniquePtr = 0; |
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194 | |
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195 | trimeshData->m_meshPartsPtr = 0; |
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196 | |
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197 | if (trimeshData->m_numMeshParts) |
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198 | { |
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199 | btChunk* chunk = serializer->allocate(sizeof(btMeshPartData),trimeshData->m_numMeshParts); |
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200 | btMeshPartData* memPtr = (btMeshPartData*)chunk->m_oldPtr; |
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201 | trimeshData->m_meshPartsPtr = (btMeshPartData *)serializer->getUniquePointer(memPtr); |
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202 | |
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203 | |
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204 | // int numtotalphysicsverts = 0; |
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205 | int part,graphicssubparts = getNumSubParts(); |
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206 | const unsigned char * vertexbase; |
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207 | const unsigned char * indexbase; |
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208 | int indexstride; |
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209 | PHY_ScalarType type; |
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210 | PHY_ScalarType gfxindextype; |
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211 | int stride,numverts,numtriangles; |
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212 | int gfxindex; |
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213 | // btVector3 triangle[3]; |
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214 | |
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215 | btVector3 meshScaling = getScaling(); |
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216 | |
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217 | ///if the number of parts is big, the performance might drop due to the innerloop switch on indextype |
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218 | for (part=0;part<graphicssubparts ;part++,memPtr++) |
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219 | { |
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220 | getLockedReadOnlyVertexIndexBase(&vertexbase,numverts,type,stride,&indexbase,indexstride,numtriangles,gfxindextype,part); |
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221 | memPtr->m_numTriangles = numtriangles;//indices = 3*numtriangles |
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222 | memPtr->m_numVertices = numverts; |
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223 | memPtr->m_indices16 = 0; |
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224 | memPtr->m_indices32 = 0; |
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225 | memPtr->m_3indices16 = 0; |
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226 | memPtr->m_vertices3f = 0; |
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227 | memPtr->m_vertices3d = 0; |
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228 | |
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229 | switch (gfxindextype) |
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230 | { |
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231 | case PHY_INTEGER: |
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232 | { |
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233 | int numindices = numtriangles*3; |
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234 | |
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235 | if (numindices) |
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236 | { |
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237 | btChunk* chunk = serializer->allocate(sizeof(btIntIndexData),numindices); |
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238 | btIntIndexData* tmpIndices = (btIntIndexData*)chunk->m_oldPtr; |
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239 | memPtr->m_indices32 = (btIntIndexData*)serializer->getUniquePointer(tmpIndices); |
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240 | for (gfxindex=0;gfxindex<numtriangles;gfxindex++) |
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241 | { |
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242 | unsigned int* tri_indices= (unsigned int*)(indexbase+gfxindex*indexstride); |
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243 | tmpIndices[gfxindex*3].m_value = tri_indices[0]; |
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244 | tmpIndices[gfxindex*3+1].m_value = tri_indices[1]; |
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245 | tmpIndices[gfxindex*3+2].m_value = tri_indices[2]; |
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246 | } |
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247 | serializer->finalizeChunk(chunk,"btIntIndexData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr); |
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248 | } |
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249 | break; |
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250 | } |
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251 | case PHY_SHORT: |
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252 | { |
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253 | if (numtriangles) |
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254 | { |
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255 | btChunk* chunk = serializer->allocate(sizeof(btShortIntIndexTripletData),numtriangles); |
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256 | btShortIntIndexTripletData* tmpIndices = (btShortIntIndexTripletData*)chunk->m_oldPtr; |
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257 | memPtr->m_3indices16 = (btShortIntIndexTripletData*) serializer->getUniquePointer(tmpIndices); |
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258 | for (gfxindex=0;gfxindex<numtriangles;gfxindex++) |
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259 | { |
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260 | unsigned short int* tri_indices= (unsigned short int*)(indexbase+gfxindex*indexstride); |
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261 | tmpIndices[gfxindex].m_values[0] = tri_indices[0]; |
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262 | tmpIndices[gfxindex].m_values[1] = tri_indices[1]; |
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263 | tmpIndices[gfxindex].m_values[2] = tri_indices[2]; |
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264 | } |
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265 | serializer->finalizeChunk(chunk,"btShortIntIndexTripletData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr); |
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266 | } |
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267 | break; |
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268 | } |
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269 | default: |
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270 | { |
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271 | btAssert(0); |
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272 | //unknown index type |
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273 | } |
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274 | } |
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275 | |
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276 | switch (type) |
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277 | { |
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278 | case PHY_FLOAT: |
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279 | { |
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280 | float* graphicsbase; |
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281 | |
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282 | if (numverts) |
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283 | { |
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284 | btChunk* chunk = serializer->allocate(sizeof(btVector3FloatData),numverts); |
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285 | btVector3FloatData* tmpVertices = (btVector3FloatData*) chunk->m_oldPtr; |
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286 | memPtr->m_vertices3f = (btVector3FloatData *)serializer->getUniquePointer(tmpVertices); |
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287 | for (int i=0;i<numverts;i++) |
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288 | { |
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289 | graphicsbase = (float*)(vertexbase+i*stride); |
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290 | tmpVertices[i].m_floats[0] = graphicsbase[0]; |
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291 | tmpVertices[i].m_floats[1] = graphicsbase[1]; |
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292 | tmpVertices[i].m_floats[2] = graphicsbase[2]; |
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293 | } |
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294 | serializer->finalizeChunk(chunk,"btVector3FloatData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr); |
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295 | } |
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296 | break; |
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297 | } |
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298 | |
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299 | case PHY_DOUBLE: |
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300 | { |
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301 | if (numverts) |
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302 | { |
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303 | btChunk* chunk = serializer->allocate(sizeof(btVector3DoubleData),numverts); |
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304 | btVector3DoubleData* tmpVertices = (btVector3DoubleData*) chunk->m_oldPtr; |
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305 | memPtr->m_vertices3d = (btVector3DoubleData *) serializer->getUniquePointer(tmpVertices); |
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306 | for (int i=0;i<numverts;i++) |
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307 | { |
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308 | double* graphicsbase = (double*)(vertexbase+i*stride);//for now convert to float, might leave it at double |
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309 | tmpVertices[i].m_floats[0] = graphicsbase[0]; |
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310 | tmpVertices[i].m_floats[1] = graphicsbase[1]; |
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311 | tmpVertices[i].m_floats[2] = graphicsbase[2]; |
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312 | } |
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313 | serializer->finalizeChunk(chunk,"btVector3DoubleData",BT_ARRAY_CODE,(void*)chunk->m_oldPtr); |
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314 | } |
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315 | break; |
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316 | } |
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317 | |
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318 | default: |
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319 | btAssert((type == PHY_FLOAT) || (type == PHY_DOUBLE)); |
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320 | } |
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321 | |
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322 | unLockReadOnlyVertexBase(part); |
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323 | } |
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324 | |
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325 | serializer->finalizeChunk(chunk,"btMeshPartData",BT_ARRAY_CODE,chunk->m_oldPtr); |
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326 | } |
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327 | |
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328 | |
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329 | m_scaling.serializeFloat(trimeshData->m_scaling); |
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330 | return "btStridingMeshInterfaceData"; |
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331 | } |
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