1 | /*==========================================================================
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2 | * (C) 2005 Universitat Jaume I
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3 | *==========================================================================
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4 | * PROYECT: GAME TOOLS
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5 | *==========================================================================
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6 | * CONTENT:
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7 | *
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8 | *
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9 | * @file GeoLodStripsLibrary.cpp
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10 | *===========================================================================*/
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11 |
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12 | #include "GeoLodStripsLibrary.h"
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13 |
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14 | using namespace Geometry;
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15 |
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16 | //-----------------------------------------------------------------------------
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17 | // Constructors.
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18 | //-----------------------------------------------------------------------------
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19 | LodStripsLibrary::LodStripsLibrary(const LodStripsLibraryData *lodstripsdata, Mesh *geomesh, CREATEINDEXDATAFUNC idfun)
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20 | :create_index_data_func(idfun?idfun:DefaultIndexDataCreator)
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21 | {
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22 | // const char *name_of_file;
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23 |
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24 | // Sets the current lod.
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25 | mCurrentLod = 0;
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26 |
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27 | // Converts a String to const char *.
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28 | // name_of_file = name.data();
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29 |
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30 | // Sets the global mesh.
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31 | mGeoMesh = geomesh;
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32 |
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33 | dataRetrievalInterface=NULL;
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34 | indices_x_submesh = NULL;
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35 | offsets_x_submesh = NULL;
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36 | mStripsSubmesh = NULL;
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37 |
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38 | // Loads the Level Of Detail file.
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39 | LodStripsLibrary::LoadStripMesh(lodstripsdata,mGeoMesh);
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40 |
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41 | GoToLod(0.0f);
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42 | minFaces = 0;
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43 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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44 | minFaces += int(mStrips[strip].size() - 2);
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45 |
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46 | GoToLod(1.0f);
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47 | maxFaces = 0;
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48 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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49 | maxFaces += int(mStrips[strip].size() - 2);
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50 | }
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51 |
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52 | //-----------------------------------------------------------------------------
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53 | // Destroyer.
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54 | //-----------------------------------------------------------------------------
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55 | LodStripsLibrary::~LodStripsLibrary()
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56 | {
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57 | delete [] mStrips;
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58 | if (dataRetrievalInterface)
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59 | delete dataRetrievalInterface;
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60 | if (indices_x_submesh)
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61 | delete[] indices_x_submesh;
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62 | if (offsets_x_submesh)
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63 | delete[] offsets_x_submesh;
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64 | if (mStripsSubmesh)
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65 | delete[] mStripsSubmesh;
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66 | }
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67 |
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68 | //-----------------------------------------------------------------------------
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69 | // Public.
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70 | //-----------------------------------------------------------------------------
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71 |
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72 | //-----------------------------------------------------------------------------
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73 | // Go to the level of detail.
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74 | //-----------------------------------------------------------------------------
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75 | void LodStripsLibrary::GoToLod(float lodfactor)
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76 | {
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77 | register int j;
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78 | register int offset;
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79 | long int i;
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80 | long int k;
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81 | long int b_change_ok = 1;
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82 | unsigned long int lod;
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83 | long int t;
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84 | long int r;
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85 | long int next;
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86 | long int el1;
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87 | long int el2;
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88 | long int total_changes;
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89 | long int totalR;
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90 | SmallIntVector *strip;
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91 | SmallIntVector::iterator start;
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92 | uint32 return_value;
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93 |
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94 | uint32 newLOD = (uint32)((1.0f - lodfactor) * mLods);
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95 |
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96 | // Initialize the return value to the current LOD.
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97 | return_value = mCurrentLod;
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98 |
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99 | if (newLOD != mCurrentLod)
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100 | {
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101 | if (newLOD > mCurrentLod)
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102 | {
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103 | // Forwards.
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104 | // Increments LOD.
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105 | for (lod = mCurrentLod; lod < newLOD; lod++)
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106 | {
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107 | next = mVertex[lod];
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108 | total_changes = mPChanges[lod];
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109 |
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110 | for (i = 0; i < total_changes; i++)
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111 | {
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112 | // Strip change.
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113 | t = mCurrentRegLOD->strip;
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114 | strip = &(mStrips[t]);
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115 | start = strip->begin();
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116 |
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117 | // Position.
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118 | totalR = mCurrentRegLOD->position;
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119 |
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120 | for (j = totalR - 1; j >= 0; j--)
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121 | {
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122 | start[*mCurrentData] = next;
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123 |
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124 | ++mCurrentData;
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125 | }
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126 |
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127 | // L1.
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128 | totalR = mCurrentRegLOD->vertexRepetition;
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129 |
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130 | for (j = totalR - 1; j >= 0; j--)
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131 | {
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132 | offset = *mCurrentData + 1;
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133 |
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134 | strip->erase( start + offset,
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135 | start
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136 | +
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137 | offset
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138 | +
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139 | (*(mCurrentData + 1)));
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140 |
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141 | ++mCurrentData;
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142 | ++mCurrentData;
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143 | }
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144 |
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145 | // L2
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146 | totalR = mCurrentRegLOD->edgeRepetition;
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147 |
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148 | for (j = totalR - 1; j >= 0; j--)
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149 | {
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150 | offset = *mCurrentData + 2;
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151 | strip->erase( start + offset,
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152 | start
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153 | +
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154 | offset
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155 | +
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156 | 2*(*(mCurrentData + 1)));
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157 |
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158 | mCurrentData++;
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159 | mCurrentData++;
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160 | }
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161 |
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162 | mCurrentRegLOD++;
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163 |
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164 | mStripsChanges[t] = 1;
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165 |
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166 | }
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167 |
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168 | mCurrentLod = lod + 1;
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169 | }
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170 |
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171 | }
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172 | // If LOD is less than actual.
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173 | else
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174 | {
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175 | mCurrentRegLOD--;
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176 | mCurrentData--;
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177 |
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178 | // Decrements LOD.
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179 | for (lod = mCurrentLod; lod > newLOD; lod--)
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180 | {
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181 | total_changes = mPChanges[lod - 1];
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182 |
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183 | for (i = 0; i < total_changes; i++)
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184 | {
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185 | t = mCurrentRegLOD->strip;
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186 | strip = &(mStrips[t]);
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187 | start = mStrips[t].begin();
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188 |
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189 | // L2.
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190 | totalR = mCurrentRegLOD->edgeRepetition;
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191 |
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192 | for (j = 0; j < totalR; j++)
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193 | {
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194 | el1 = (*strip)[*(mCurrentData - 1)];
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195 | el2 = (*strip)[*(mCurrentData - 1) + 1];
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196 | r = *(mCurrentData);
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197 |
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198 | for (k = 0; k < r; k++)
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199 | {
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200 | (*strip).insert(start+*(mCurrentData - 1),el2);
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201 | (*strip).insert(start+*(mCurrentData - 1),el1);
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202 | }
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203 |
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204 | mCurrentData--;
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205 | mCurrentData--;
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206 | }
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207 |
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208 | // Vertex Repetition.
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209 | totalR = mCurrentRegLOD->vertexRepetition;
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210 |
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211 | for (j = 0; j < totalR; j++)
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212 | {
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213 | el1 = (*strip)[*(mCurrentData-1)];
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214 | r = *(mCurrentData);
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215 |
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216 | for (k = 0; k < r; k++)
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217 | {
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218 | (*strip).insert(start+*(mCurrentData-1),el1);
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219 | }
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220 |
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221 | mCurrentData--;
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222 | mCurrentData--;
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223 | }
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224 |
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225 | // POS.
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226 | totalR = mCurrentRegLOD->position;
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227 |
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228 | for (j = 0; j < totalR; j++)
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229 | {
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230 | (*strip)[*mCurrentData] = lod - 1;
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231 | mCurrentData--;
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232 | }
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233 |
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234 | mCurrentRegLOD--;
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235 | mStripsChanges[t] = 1;
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236 | }
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237 |
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238 | // Update LOD.
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239 | mCurrentLod = lod - 1;
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240 | }
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241 |
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242 | mCurrentData++;
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243 | mCurrentRegLOD++;
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244 | }
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245 | }
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246 |
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247 | UpdateDataRetrievalInterface();
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248 | // return return_value;
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249 | }
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250 |
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251 | //-----------------------------------------------------------------------------
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252 | // Returns the number of vertices of the highest LOD.
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253 | //-----------------------------------------------------------------------------
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254 | uint32 LodStripsLibrary::MaxVertices()
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255 | {
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256 | return mMaxVerticesLOD;
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257 | }
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258 |
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259 | //-----------------------------------------------------------------------------
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260 | // Returns the number of vertices of the lowest LOD.
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261 | //-----------------------------------------------------------------------------
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262 | uint32 LodStripsLibrary::MinVertices()
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263 | {
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264 | uint32 number_of_vertices;
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265 |
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266 | // Total vertices of minimum lod.
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267 | number_of_vertices = mMaxVerticesLOD - (mMinLod + 1);
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268 |
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269 | return number_of_vertices;
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270 | }
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271 |
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272 | //-----------------------------------------------------------------------------
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273 | // Returns the number of triangles of the highest LOD.
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274 | //-----------------------------------------------------------------------------
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275 | uint32 LodStripsLibrary::MaxFaces()
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276 | {
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277 | /* uint32 number_of_faces;
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278 |
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279 | uint32 current_lod;
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280 |
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281 | current_lod = GoToLod(MaxLod());
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282 |
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283 | // Initialize number of faces count.
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284 | number_of_faces = 0;
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285 |
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286 | // For each strip.
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287 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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288 | {
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289 | number_of_faces += int(mStrips[strip].size() - 2);
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290 | }
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291 |
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292 | GoToLod(current_lod);
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293 |
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294 | return number_of_faces;*/
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295 |
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296 | return maxFaces;
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297 | }
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298 |
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299 | //-----------------------------------------------------------------------------
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300 | // Returns the number of triangles of the lowest LOD.
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301 | //-----------------------------------------------------------------------------
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302 | uint32 LodStripsLibrary::MinFaces()
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303 | {
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304 | /* uint32 current_lod;
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305 | uint32 number_of_faces;
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306 |
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307 | current_lod = GoToLod(MinLod());
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308 |
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309 | // Initialize number of faces count.
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310 | number_of_faces = 0;
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311 |
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312 | // For each strip.
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313 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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314 | {
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315 | number_of_faces += int(mStrips[strip].size() - 2);
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316 | }
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317 |
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318 | GoToLod(current_lod);
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319 |
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320 | return number_of_faces;*/
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321 |
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322 | return minFaces;
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323 | }
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324 |
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325 | //-----------------------------------------------------------------------------
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326 | // Establishes the new LOD range.
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327 | // Only the LODs in that range are stored and used.
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328 | //-----------------------------------------------------------------------------
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329 | void LodStripsLibrary::TrimByLod(uint32 minLod, uint32 maxLod)
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330 | {
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331 | // Refresh number of vercies of the max lod.
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332 | mMaxVerticesLOD += mMaxLod - maxLod;
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333 |
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334 | mMinLod = minLod;
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335 | mMaxLod = maxLod;
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336 | }
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337 | /*
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338 | //-----------------------------------------------------------------------------
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339 | // Get strip count.
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340 | //-----------------------------------------------------------------------------
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341 | uint32 LodStripsLibrary::GetStripCount() const
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342 | {
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343 | return (uint32) mTotalStrips;
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344 | }
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345 |
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346 | //-----------------------------------------------------------------------------
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347 | // Get Index by strip.
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348 | //-----------------------------------------------------------------------------
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349 | uint32 LodStripsLibrary::GetIndexCountByStrip(uint32 istrip) const
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350 | {
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351 | return (uint32) mStrips[istrip].size();
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352 | }
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353 | */
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354 | //-----------------------------------------------------------------------------
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355 | // Private.
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356 | //-----------------------------------------------------------------------------
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357 |
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358 | //-----------------------------------------------------------------------------
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359 | // Copy a STL vector to a C array.
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360 | //-----------------------------------------------------------------------------
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361 | void LodStripsLibrary::CopyVectors2Arrays()
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362 | {
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363 | SmallInt max;
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364 | SmallInt t;
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365 | SmallInt *data_array;
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366 | SmallIntVector tira;
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367 | LODRegisterType *changes_array;
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368 | LODRegisterVector list_changes;
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369 |
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370 | mTotalStrips = int(mFileStrips.size());
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371 | mVertex = new SmallInt[mTotalVertices];
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372 | mStripsChanges = new SmallInt[mTotalChanges];
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373 | mStrips = new SmallIntVector[mTotalStrips];
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374 | data_array = new SmallInt[mData.size()];
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375 |
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376 | max = 0;
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377 | mTotalFaces = 0;
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378 |
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379 | // unsigned int * strip_sizes = new unsigned int[mFileStrips.size()];
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380 | unsigned int total_strip_size = 0;
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381 |
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382 | for (unsigned int i = 0; i < mFileStrips.size(); i++)
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383 | {
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384 | total_strip_size += t = int(mFileStrips[i].size());
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385 | if (t>max)
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386 | max = t;
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387 | mTotalFaces += t - 2;
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388 | }
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389 |
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390 | changes_array = new LODRegisterType[mFileChangesLOD.size()];
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391 |
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392 | // Fill up changes array.
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393 | for (unsigned int i = 0; i < mFileChangesLOD.size(); ++i)
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394 | {
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395 | changes_array[i] = mFileChangesLOD[i];
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396 | }
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397 |
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398 | mCurrentRegLOD = changes_array;
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399 |
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400 | // Copy strips.
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401 | unsigned int numDegenerated = 2*mTotalStrips - 2;
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402 | dataRetrievalInterface=create_index_data_func(total_strip_size+numDegenerated); // temporal!
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403 | dataRetrievalInterface->Begin();
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404 |
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405 | unsigned int ii = 0;
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406 |
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407 | for (unsigned int i = 0; i < mFileStrips.size(); i++)
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408 | {
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409 | for (unsigned int j = 0; j < mFileStrips[i].size(); j++,ii++)
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410 | {
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411 | mStrips[i].push_back(mFileStrips[i][j]);
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412 | dataRetrievalInterface->SetIndex(ii,mFileStrips[i][j]);
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413 | }
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414 |
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415 | // Reset flags of strips changed.
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416 | mStripsChanges[i] = 0;
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417 | }
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418 | dataRetrievalInterface->End();
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419 |
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420 | for (unsigned int i = 0; i < mData.size(); i++)
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421 | {
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422 | data_array[i] = mData[i];
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423 | }
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424 |
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425 | mCurrentData = data_array;
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426 |
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427 | // Fill up mVertex.
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428 | for(unsigned int i = 0; i < mFileVertices.size(); i++)
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429 | {
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430 | mVertex[i] = mFileVertices[i];
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431 | }
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432 |
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433 | // delete[] strip_sizes;
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434 | }
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435 |
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436 | //-----------------------------------------------------------------------------
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437 | // LoadStripMesh
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438 | //-----------------------------------------------------------------------------
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439 | void LodStripsLibrary::LoadStripMesh(const LodStripsLibraryData *lodstripsdata, Mesh *geomesh)
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440 | {
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441 | //FILE *fp;
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442 | SmallIntVector strip_aux;
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443 | //LODRegisterType lod_register;
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444 | std::vector <LODRegisterType> list_pos;
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445 | std::vector <unsigned int> p_changes;
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446 | //int value;
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447 | int v = 0;
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448 | int t = -1;
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449 | int s = 0;
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450 | int next = 0;
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451 | int c = -1;
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452 | //char buff[80];
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453 | Index *index;
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454 | Index *indexBegin;
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455 | Index *indexEnd;
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456 | SubMesh *geoSubMesh;
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457 |
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458 | // For each one of the submeshes.
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459 | indices_x_submesh = new int[geomesh->mSubMeshCount];
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460 | offsets_x_submesh = new int[geomesh->mSubMeshCount];
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461 | for (unsigned int submesh = 0; submesh < geomesh->mSubMeshCount; submesh++)
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462 | {
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463 | geoSubMesh = &geomesh->mSubMesh[submesh];
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464 |
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465 | // For each one of the strips.
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466 | for (unsigned int strip = 0; strip < geoSubMesh->mStripCount; strip++)
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467 | {
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468 | // Insert an empty strip.
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469 | t++;
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470 | strip_aux.clear();
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471 | mFileStrips.push_back(strip_aux);
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472 |
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473 | // First index of the strip.
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474 | indexBegin = geoSubMesh->mStrip[strip];
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475 |
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476 | // If the strips is not the first.
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477 | /*
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478 | if (strip != 0)
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479 | {
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480 | indexBegin++;
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481 | }
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482 | */
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483 |
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484 | // If is the final strip
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485 | if (strip == (geoSubMesh->mStripCount - 1))
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486 | {
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487 | // The end of the index array.
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488 | indexEnd = &geoSubMesh->mIndex[geoSubMesh->mIndexCount];
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489 | }
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490 | else
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491 | {
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492 | // The beginning of the next strip.
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493 | indexEnd = geoSubMesh->mStrip[strip + 1];
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494 |
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495 | // Remove degenerated
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496 | //indexEnd--;
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497 | }
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498 |
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499 | int i;
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500 | i = 0;
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501 | indices_x_submesh[submesh] = 0;
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502 | if (submesh==0)
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503 | offsets_x_submesh[submesh] = 0;
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504 | else
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505 | offsets_x_submesh[submesh] = indices_x_submesh[submesh-1];
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506 |
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507 | // For each index of the strip.
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508 | for (index = indexBegin; index < indexEnd; index++)
|
---|
509 | {
|
---|
510 | mFileStrips[t].push_back(indexBegin[i]);
|
---|
511 | indices_x_submesh[submesh]++;
|
---|
512 | i++;
|
---|
513 | }
|
---|
514 | }
|
---|
515 | }
|
---|
516 |
|
---|
517 | // TODO: LOD file loaded in load file mesh process.
|
---|
518 | // Open the LOD file.
|
---|
519 | /* if ((fp = fopen (name, "r")) == NULL)
|
---|
520 | {
|
---|
521 | // Error in open.
|
---|
522 | }
|
---|
523 | else
|
---|
524 | {
|
---|
525 | mTotalChanges = 0;
|
---|
526 |
|
---|
527 | while (!feof (fp))
|
---|
528 | {
|
---|
529 | fgets (buff, 80, fp);
|
---|
530 |
|
---|
531 | if (*buff == 'v')
|
---|
532 | {
|
---|
533 | sscanf (buff+2,"%d",&value);
|
---|
534 |
|
---|
535 | mFileVertices.push_back(value);
|
---|
536 | v++;
|
---|
537 | }
|
---|
538 | else if ( (*buff == 'c') || (*buff == 'd'))
|
---|
539 | {
|
---|
540 | if (*buff == 'c')
|
---|
541 | {
|
---|
542 | c++;
|
---|
543 | }
|
---|
544 | else
|
---|
545 | {
|
---|
546 | unsigned int a;
|
---|
547 | unsigned int b;
|
---|
548 | unsigned int c;
|
---|
549 | unsigned int d;
|
---|
550 |
|
---|
551 | sscanf (buff+2,"%u %u %u %u\n",&a,&b,&c,&d);
|
---|
552 | lod_register.strip = a;
|
---|
553 | lod_register.position = b;
|
---|
554 | lod_register.vertexRepetition = c;
|
---|
555 | lod_register.edgeRepetition = d;
|
---|
556 |
|
---|
557 | mFileChangesLOD.push_back(lod_register);
|
---|
558 | }
|
---|
559 | }
|
---|
560 | else if (*buff=='b')
|
---|
561 | {
|
---|
562 | sscanf(buff+2,"%u",&value);
|
---|
563 | mData.push_back(value);
|
---|
564 | }
|
---|
565 | else if (*buff=='p')
|
---|
566 | {
|
---|
567 | sscanf (buff+2,"%u",&value);
|
---|
568 | p_changes.push_back(value);
|
---|
569 | }
|
---|
570 | }
|
---|
571 |
|
---|
572 | fclose(fp);*/
|
---|
573 |
|
---|
574 | mFileVertices = lodstripsdata->mFileVertices;
|
---|
575 | mFileChangesLOD = lodstripsdata->mFileChangesLOD;
|
---|
576 | mData = lodstripsdata->mData;
|
---|
577 | p_changes = lodstripsdata->p_changes;
|
---|
578 |
|
---|
579 | mStripsSubmesh = new int [geomesh->mSubMeshCount];
|
---|
580 | for (size_t submesh = 0; submesh < geomesh->mSubMeshCount; submesh++)
|
---|
581 | {
|
---|
582 | mStripsSubmesh[submesh]=0;
|
---|
583 | }
|
---|
584 |
|
---|
585 |
|
---|
586 | // Max / Min values for LOD.
|
---|
587 | mLods = int(p_changes.size());
|
---|
588 | mMaxLod = 0;
|
---|
589 | mMinLod = mLods;
|
---|
590 |
|
---|
591 | mPChanges = new SmallInt[mLods];
|
---|
592 |
|
---|
593 | for (unsigned int i = 0; i < mLods; i++)
|
---|
594 | {
|
---|
595 | mPChanges[i] = p_changes[i];
|
---|
596 | }
|
---|
597 |
|
---|
598 | mTotalVertices = int(mFileVertices.size());
|
---|
599 | mMaxVerticesLOD = mTotalVertices;
|
---|
600 | mTotalStrips = int(mFileStrips.size());
|
---|
601 | mTotalChanges = int(mFileChangesLOD.size());
|
---|
602 |
|
---|
603 | //Copy the data to the structure we will use
|
---|
604 | CopyVectors2Arrays();
|
---|
605 | // }
|
---|
606 | }
|
---|
607 |
|
---|
608 | void LodStripsLibrary::UpdateDataRetrievalInterface(void)
|
---|
609 | {
|
---|
610 | unsigned int ii = 0;
|
---|
611 |
|
---|
612 | dataRetrievalInterface->Begin();
|
---|
613 |
|
---|
614 | int counter = 0;
|
---|
615 | int target_submesh = 0;
|
---|
616 | size_t strip_count = 0;
|
---|
617 |
|
---|
618 | for (unsigned int i = 0; i < mTotalStrips; i++, strip_count++)
|
---|
619 | {
|
---|
620 | if (strip_count >= mGeoMesh->mSubMesh[target_submesh].mStripCount)
|
---|
621 | {
|
---|
622 | indices_x_submesh[target_submesh] = counter;
|
---|
623 |
|
---|
624 | if (target_submesh==0)
|
---|
625 | {
|
---|
626 | offsets_x_submesh[target_submesh] = 0;
|
---|
627 | }
|
---|
628 | else
|
---|
629 | {
|
---|
630 | offsets_x_submesh[target_submesh] = indices_x_submesh[target_submesh-1] + offsets_x_submesh[target_submesh-1];
|
---|
631 | }
|
---|
632 |
|
---|
633 | counter = 0;
|
---|
634 | mStripsSubmesh[target_submesh] = (int)strip_count;
|
---|
635 | strip_count = 0;
|
---|
636 |
|
---|
637 | target_submesh++;
|
---|
638 | }
|
---|
639 |
|
---|
640 | int lastindex = -1;
|
---|
641 | for (SmallIntVector::iterator it=mStrips[i].begin(); it!=mStrips[i].end(); it++, ii++)
|
---|
642 | {
|
---|
643 | // repeat the first index of the strip: degenerate
|
---|
644 | if (lastindex==-1)
|
---|
645 | {
|
---|
646 | lastindex=*it;
|
---|
647 | dataRetrievalInterface->SetIndex(ii,*it);
|
---|
648 | counter++;
|
---|
649 | ii++;
|
---|
650 | }
|
---|
651 | lastindex=*it;
|
---|
652 | dataRetrievalInterface->SetIndex(ii,*it);
|
---|
653 | counter++;
|
---|
654 | }
|
---|
655 |
|
---|
656 | // last repeat last vertex of the strip: degenerate
|
---|
657 | dataRetrievalInterface->SetIndex(ii,lastindex);
|
---|
658 | counter++;
|
---|
659 | ii++;
|
---|
660 |
|
---|
661 | dataRetrievalInterface->SetNumValidIndices(ii);
|
---|
662 | }
|
---|
663 |
|
---|
664 | if (strip_count >= mGeoMesh->mSubMesh[target_submesh].mStripCount)
|
---|
665 | {
|
---|
666 | indices_x_submesh[target_submesh] = counter;
|
---|
667 | if (target_submesh==0)
|
---|
668 | offsets_x_submesh[target_submesh] = 0;
|
---|
669 | else
|
---|
670 | offsets_x_submesh[target_submesh] = indices_x_submesh[target_submesh-1] + offsets_x_submesh[target_submesh-1];
|
---|
671 |
|
---|
672 | counter = 0;
|
---|
673 | mStripsSubmesh[target_submesh] = (int)strip_count;
|
---|
674 | strip_count = 0;
|
---|
675 | target_submesh++;
|
---|
676 | }
|
---|
677 |
|
---|
678 | dataRetrievalInterface->End();
|
---|
679 | }
|
---|