1 | /*==========================================================================
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2 | * (C) 2005 Universidad Jaime I de Castellón
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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.h
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10 | *==========================================================================*/
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11 |
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12 | #ifndef _GEOLODSTRIPSLIBRARY
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13 | #define _GEOLODSTRIPSLIBRARY
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14 |
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15 | #include "GeoMesh.h"
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16 | #include <vector>
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17 | #include <time.h>
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18 |
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19 | namespace Geometry
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20 | {
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21 | //typedef unsigned long int SmallInt;
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22 | typedef unsigned long SmallInt;
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23 | typedef unsigned long ULong;
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24 | typedef long Long;
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25 |
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26 | typedef struct
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27 | {
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28 | SmallInt strip;
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29 | SmallInt position;
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30 | SmallInt rep; //For the vertex repetition
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31 | } PositionType;
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32 |
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33 | typedef struct
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34 | {
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35 | unsigned long strip;
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36 | char position;
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37 | char vertexRepetition;
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38 | char edgeRepetition;
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39 | } LODRegisterType;
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40 |
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41 | typedef struct
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42 | {
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43 | float Vertex[3];
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44 | SmallInt Next;
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45 | } VertexType;
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46 |
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47 | typedef std::vector <SmallInt> SmallIntVector;
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48 | typedef std::vector <LODRegisterType> LODRegisterVector;
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49 | typedef std::vector <Long> LongVector;
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50 |
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51 | /// LodStripsLibrary interface class.
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52 | /** This module contains functions that handle the levels of detail
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53 | * of the input multiresolution objects made of polygonal meshes.
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54 | * For any given resolution and object, this module returns a set
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55 | * of triangle strips representing the object at that resolution,
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56 | * that is, at the level of detail requested. These models use
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57 | * triangle strips to reduce storage usage and to speed up realistic
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58 | * rendering.
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59 | \n\n
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60 |
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61 | Inputs:\n
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62 | - The module receives a file describing a multiresolution object.
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63 | .
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64 |
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65 | Outputs:\n
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66 | - The module returns a strip set that represents the level of
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67 | detail requested.
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68 | .
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69 |
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70 | */
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71 | class LodStripsLibrary
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72 | {
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73 | private:
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74 |
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75 | // The name of the object.
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76 | String mName;
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77 |
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78 | // Structures with the data read from the file
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79 | // We won't work with these structures
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80 | SmallIntVector mFileVertices;
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81 | std::vector <LODRegisterType> mFileChangesLOD;
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82 | std::vector <SmallIntVector> mFileStrips;
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83 | LongVector mData;
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84 |
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85 | // Structures with the data to work with
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86 |
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87 | // Total strips of the multiresolution object.
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88 | SmallInt mTotalStrips;
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89 |
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90 | // Total vertices of the multiresolution object.
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91 | SmallInt mTotalVertices;
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92 |
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93 | // Number of vertices of the max LOD.
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94 | SmallInt mMaxVerticesLOD;
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95 |
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96 | // Total changes of the multiresolution object.
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97 | SmallInt mTotalChanges;
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98 |
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99 | SmallInt mLods; // Available Lods.
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100 | SmallInt mMaxLod; // Max level of detail.
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101 | SmallInt mMinLod; // Min level of detail.
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102 | SmallInt mCurrentLod; // Current Lod.
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103 |
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104 | // For the efficient version.
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105 | SmallInt mTotalFaces;
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106 | SmallInt *mCurrentData;
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107 | SmallInt *mStripsChanges;
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108 | LODRegisterType *mCurrentRegLOD;
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109 | SmallInt *mVertex;
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110 |
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111 | // Changes of Strips in LOD file (p).
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112 | SmallInt *mPChanges;
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113 |
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114 | ///Total of vertices shown at the moment.
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115 | long int mTotal;
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116 |
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117 | // Global mesh object.
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118 | Mesh *mGeoMesh;
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119 |
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120 | // Copa STL vectors to C arrays.
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121 | void CopyVectors2Arrays();
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122 |
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123 | // Loads Mesh.
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124 | void LoadStripMesh(char *name, Mesh *geomesh);
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125 |
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126 | public:
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127 |
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128 | // Strips vector.
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129 | SmallIntVector *mStrips;
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130 |
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131 | /** Constructor, receives as a parameter the name of the file
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132 | * including the multiresolution object.
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133 | */
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134 | LodStripsLibrary(std::string, Mesh *geomesh);
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135 |
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136 | /// Destructor.
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137 | ~LodStripsLibrary(void);
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138 |
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139 | /// Copy constructor
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140 | //LodStripsLibrary(const LodStripsLibrary&);
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141 |
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142 | /// Assignment operator
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143 | //LodStripsLibrary& operator =(const LodStripsLibrary&);
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144 |
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145 | /// Returns the highest LOD.
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146 | uint32 MaxLod();
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147 |
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148 | /// Returns the lowest LOD.
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149 | uint32 MinLod();
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150 |
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151 | /// Returns de current LOD and changes to the specified LOD.
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152 | uint32 GoToLod(uint32);
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153 |
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154 | /// Establishes the new LOD range.
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155 | /// Only the LODs in that range are stored and used.
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156 | void TrimByLod(uint32, uint32);
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157 |
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158 | /// Returns the number of triangles of the highest LOD.
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159 | uint32 MaxFaces();
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160 |
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161 | /// Returns the number of triangles of the lowest LOD.
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162 | uint32 MinFaces();
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163 |
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164 | /// Returns the number of vertices of the highest LOD.
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165 | uint32 MaxVertices();
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166 |
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167 | /// Returns the number of vertices of the lowest LOD.
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168 | uint32 MinVertices();
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169 |
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170 | // (New) Get the number of strips.
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171 | uint32 GetStripCount() const;
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172 | uint32 GetIndexCountByStrip(uint32) const;
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173 | };
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174 | }
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175 |
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176 | #endif
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177 |
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