1 | #include "ivmeshdata.h"
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2 | #include "IVReader.h"
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3 |
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4 |
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5 | IVMeshData::IVMeshData()
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6 | {
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7 | vertices = normals = texCoords = indices = normalIndices = texCoordIndices = NULL;
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8 | vcnt = ncnt = tcnt = icnt = nicnt = ticnt = 0;
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9 | roType = IV_ROT_INVALID;
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10 | boundingBox = NULL;
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11 | }
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12 |
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13 | IVMeshData::~IVMeshData()
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14 | {
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15 | }
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16 |
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17 | void IVMeshData::collapse()
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18 | {
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19 | if (indices != NULL) delete [] indices;
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20 | if (vertices != NULL) delete [] vertices;
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21 | if (normals != NULL) delete [] normals;
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22 | if (texCoords != NULL) delete [] texCoords;
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23 | if (normalIndices != NULL) delete [] normalIndices;
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24 | if (texCoordIndices != NULL) delete [] texCoordIndices;
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25 | if (boundingBox != NULL) delete boundingBox;
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26 | indices = vertices = normals = texCoords = normalIndices = texCoords = NULL;
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27 | boundingBox = NULL;
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28 | }
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29 |
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30 | int IVMeshData::getSeparatorCnt(Ogre::Real *data, int end)
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31 | {
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32 | int cnt = 0;
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33 | for (int i=0; i < end; i++) if (data[i] < 0.f) cnt++;
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34 | return cnt;
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35 | }
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36 |
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37 | Ogre::AxisAlignedBox *IVMeshData::calcBoundingBox()
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38 | {
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39 | if ((vertices == NULL) || (vcnt <=0)) return new Ogre::AxisAlignedBox(0, 0, 0, 0, 0, 0);
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40 | Ogre::Real x, y, z, minX, minY, minZ, maxX, maxY, maxZ;
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41 | minX = minY = minZ = 999999;
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42 | maxX = maxY = maxZ = -999999;
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43 | for (int i=0; i<vcnt/3; i++)
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44 | {
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45 | x = vertices[i*3];
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46 | if (minX > x) minX = x; if (maxX < x) maxX = x;
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47 | y = vertices[i*3+1];
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48 | if (minY > y) minY = y; if (maxY < y) maxY = y;
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49 | z = vertices[i*3+2];
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50 | if (minZ > z) minZ = z; if (maxZ < z) maxZ = z;
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51 | }
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52 | return new Ogre::AxisAlignedBox(minX, minY, minZ, maxX, maxY, maxZ);
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53 |
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54 | }
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55 |
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56 |
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57 | Ogre::Real *IVMeshData::expandTriangleStripIndices(Ogre::Real *indices, int icnt, int *icntOut)
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58 | {
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59 | if (indices[icnt-1] >= 0.0)
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60 | *icntOut = (icnt+1 - 3*(getSeparatorCnt(indices, icnt)+1))*3;
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61 | else
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62 | *icntOut = (icnt - 3*getSeparatorCnt(indices, icnt))*3;
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63 | if (*icntOut < 0)
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64 | int hoppla = 1;
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65 | Ogre::Real *indOut = new Ogre::Real[*icntOut];
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66 |
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67 | int triangleCnt = 0, tc = 0;
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68 | for (int i=2; i < icnt; i++)
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69 | {
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70 | if (indices[i] >= 0)
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71 | {
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72 | if (tc % 2 == 0)
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73 | {
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74 | indOut[triangleCnt*3] = indices[i-2];
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75 | indOut[triangleCnt*3+1] = indices[i-1];
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76 | indOut[triangleCnt*3+2] = indices[i];
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77 | }
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78 | else
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79 | {
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80 | indOut[triangleCnt*3] = indices[i];
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81 | indOut[triangleCnt*3+1] = indices[i-1];
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82 | indOut[triangleCnt*3+2] = indices[i-2];
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83 | }
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84 | triangleCnt++; tc++;
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85 | }
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86 | else
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87 | {
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88 | i += 2; tc = 0;
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89 | }
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90 | }
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91 | return indOut;
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92 | }
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93 |
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94 | int IVMeshData::getNextFaceSize(int start)
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95 | {
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96 | for (int i=start; i < icnt; i++)
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97 | {
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98 | if (indices[i] < 0.f) return i - start;
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99 | }
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100 | return icnt - start;
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101 | }
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102 |
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103 | Ogre::Real *IVMeshData::expandFaceSetIndices(Ogre::Real *indices, int icnt, int *icntOut)
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104 | {
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105 | if (indices[icnt-1] >= 0.0)
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106 | *icntOut = (icnt+1 - 3*(getSeparatorCnt(indices, icnt)+1))*3;
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107 | else
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108 | *icntOut = (icnt - 3*getSeparatorCnt(indices, icnt))*3;
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109 | Ogre::Real *indOut = new Ogre::Real[*icntOut];
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110 |
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111 | int index = 0, size = 0;
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112 | for (int i=0; i < icnt; i++)
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113 | {
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114 | if ((size = getNextFaceSize(i)) < 3) break;
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115 | for (int j=0; j < size-2; j++)
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116 | {
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117 | indOut[index] = indices[i]; index++;
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118 | indOut[index] = indices[i+1+j]; index++;
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119 | indOut[index] = indices[i+2+j]; index++;
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120 | }
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121 | i = i + size;
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122 | }
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123 | return indOut;
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124 | }
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125 |
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126 | IVMeshData *IVMeshData::expand()
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127 | {
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128 | using namespace Ogre;
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129 |
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130 | IVMeshData *mDataOut = new IVMeshData();
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131 |
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132 | mDataOut->boundingBox = calcBoundingBox();
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133 | if ((vertices == NULL) || (vcnt <= 0) || (indices == NULL) || (icnt <= 0))
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134 | {
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135 | if (IVReader::IVLog != NULL)
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136 | {
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137 | std::string message = "Expand-Error: ((vertices == NULL) || (vcnt <= 0) || (indices == NULL) || (icnt <= 0))";
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138 | IVReader::IVLog->logMessage(message);
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139 | }
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140 |
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141 | return mDataOut;
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142 | }
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143 | bool nOk, tOk, niOk, tiOk, nperv, tperv;
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144 | nOk = ((normals != NULL) && (ncnt > 0));
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145 | tOk = ((texCoords != NULL) && (tcnt > 0));
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146 | nperv = (ncnt == vcnt) && (nicnt != icnt);
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147 | tperv = (tcnt*3 == vcnt*2) && (ticnt != icnt);
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148 |
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149 | if ((nOk && !nperv) || (tOk && !tperv))
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150 | {
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151 | niOk = ((normalIndices != NULL) && (nicnt == icnt));
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152 | tiOk = ((texCoordIndices != NULL) && (ticnt == icnt));
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153 |
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154 | if (!nperv && nOk && !niOk) nOk = false;
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155 | if (!tperv && tOk && !tiOk) tOk = false;
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156 |
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157 | int sepcnt = getSeparatorCnt(indices, icnt);
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158 | mDataOut->icnt = icnt;
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159 | mDataOut->vcnt = (icnt - sepcnt)*3;
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160 | mDataOut->vertices = new Real[mDataOut->vcnt];
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161 |
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162 | if (nOk)
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163 | {
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164 | mDataOut->ncnt = mDataOut->vcnt;
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165 | mDataOut->normals = new Real[mDataOut->ncnt];
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166 | }
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167 | if (tOk)
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168 | {
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169 | mDataOut->tcnt = (icnt - sepcnt)*2;
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170 | mDataOut->texCoords = new Real[mDataOut->tcnt];
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171 | }
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172 | mDataOut->indices = new Real[mDataOut->icnt];
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173 |
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174 | int index = 0;
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175 | for (int i=0; i < icnt; i++)
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176 | {
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177 | if (indices[i] >= 0.f)
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178 | {
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179 | mDataOut->vertices[index*3] = vertices[(int)indices[i]*3];
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180 | mDataOut->vertices[index*3+1] = vertices[(int)indices[i]*3+1];
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181 | mDataOut->vertices[index*3+2] = vertices[(int)indices[i]*3+2];
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182 |
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183 | if (nOk)
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184 | {
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185 | if (nperv)
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186 | {
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187 | mDataOut->normals[index*3] = normals[(int)indices[i]*3];
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188 | mDataOut->normals[index*3+1] = normals[(int)indices[i]*3+1];
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189 | mDataOut->normals[index*3+2] = normals[(int)indices[i]*3+2];
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190 | }
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191 | else
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192 | {
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193 | mDataOut->normals[index*3] = normals[(int)normalIndices[i]*3];
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194 | mDataOut->normals[index*3+1] = normals[(int)normalIndices[i]*3+1];
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195 | mDataOut->normals[index*3+2] = normals[(int)normalIndices[i]*3+2];
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196 | }
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197 | }
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198 | if (tOk)
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199 | {
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200 | if (tperv)
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201 | {
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202 | mDataOut->texCoords[index*2] = texCoords[(int)indices[i]*2];
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203 | mDataOut->texCoords[index*2+1] = texCoords[(int)indices[i]*2+1];
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204 | }
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205 | else
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206 | {
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207 | mDataOut->texCoords[index*2] = texCoords[(int)texCoordIndices[i]*2];
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208 | mDataOut->texCoords[index*2+1] = texCoords[(int)texCoordIndices[i]*2+1];
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209 | }
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210 | }
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211 |
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212 | mDataOut->indices[i] = index;
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213 | index++;
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214 | }
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215 | else mDataOut->indices[i] = indices[i];
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216 | }
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217 | }
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218 | else
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219 | {
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220 | mDataOut->icnt = icnt;
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221 | mDataOut->indices = new Real[mDataOut->icnt];
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222 | memcpy(mDataOut->indices, indices, mDataOut->icnt*sizeof(Real));
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223 |
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224 | mDataOut->vcnt = vcnt;
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225 | mDataOut->vertices = new Real[mDataOut->vcnt];
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226 | memcpy(mDataOut->vertices, vertices, mDataOut->vcnt*sizeof(Real));
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227 |
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228 | if (nOk)
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229 | {
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230 | mDataOut->ncnt = ncnt;
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231 | mDataOut->normals = new Real[mDataOut->ncnt];
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232 | memcpy(mDataOut->normals, normals, mDataOut->ncnt*sizeof(Real));
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233 | }
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234 | if (tOk)
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235 | {
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236 | mDataOut->tcnt = tcnt;
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237 | mDataOut->texCoords = new Real[mDataOut->tcnt];
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238 | memcpy(mDataOut->texCoords, texCoords, mDataOut->tcnt*sizeof(Real));
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239 | }
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240 |
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241 | }
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242 |
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243 | int icntNew = 0;
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244 | Real *indicesNew = NULL;
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245 | mDataOut->roType = roType;
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246 | if (mDataOut->roType == IV_ROT_TRIANGLE_STRIP)
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247 | {
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248 | indicesNew = expandTriangleStripIndices(mDataOut->indices, mDataOut->icnt, &icntNew);
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249 | }
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250 | else if (mDataOut->roType == IV_ROT_FACE_SET)
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251 | {
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252 | indicesNew = expandFaceSetIndices(mDataOut->indices, mDataOut->icnt, &icntNew);
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253 | }
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254 | else
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255 | {
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256 | return mDataOut;
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257 | }
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258 | delete [] mDataOut->indices;
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259 | mDataOut->indices = indicesNew;
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260 | mDataOut->icnt = icntNew;
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261 |
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262 | return mDataOut;
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263 | }
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