1 | #ifndef _ViewCellsManager_H__
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2 | #define _ViewCellsManager_H__
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3 |
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4 | #include "Ray.h"
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5 | #include "VssRay.h"
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6 | #include "Containers.h"
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7 |
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8 | class ViewCell;
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9 | class Intersectable;
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10 | class RenderSimulator;
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11 | class Mesh;
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12 | struct Triangle3;
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13 | class SimulationStatistics;
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14 | class BspTree;
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15 | class KdTree;
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16 | class VspKdTree;
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17 | class VspBspTree;
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18 | class KdNode;
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19 | class KdLeaf;
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20 | class VspKdTree;
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21 | class AxisAlignedBox3;
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22 | class VspBspLeaf;
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23 |
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24 | /**
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25 | Manages different higher order operations on the view cells.
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26 | */
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27 | class ViewCellsManager
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28 | {
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29 |
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30 | public:
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31 |
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32 | /// view cell container types
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33 | enum {BSP, KD, VSP_KD, VSP_BSP};
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34 |
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35 | /** Constructor taking the maximal number of samples used for construction
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36 | */
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37 | ViewCellsManager(const int constructionSamples);
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38 |
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39 | ViewCellsManager();
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40 |
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41 | ~ViewCellsManager();
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42 |
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43 | /** Constructs view cell container with a given number of samples.
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44 | */
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45 | virtual int Construct(const ObjectContainer &objects,
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46 | const VssRayContainer &rays,
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47 | AxisAlignedBox3 *sceneBbox = NULL) = 0;
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48 |
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49 | /** Computes sample contributions of the rays to the view cells PVS.
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50 |
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51 | @param rays bundle of rays used to find intersections with view cells and
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52 | adding the contribution
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53 | @param castRays true if ray should be cast to gain the information, false if rays
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54 | already hold the view cells intersection information and need not be recast.
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55 | @param sampleContributions returns the number of sample contributions
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56 | @param contributingSamples returns the number of contributingSamples
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57 | */
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58 | void ComputeSampleContributions(const RayContainer &rays,
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59 | const bool castRays,
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60 | int &sampleContributions,
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61 | int &contributingSamples);
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62 |
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63 |
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64 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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65 | @param ray finds intersections with view cells and holds the contribution
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66 | @param castRay true if ray should be cast to gain the information, false if ray
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67 | is already holding the information and need not be recast.
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68 |
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69 | @returns number of sample contributions
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70 | */
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71 | virtual int ComputeSampleContributions(Ray &ray, const bool castRay = true) = 0;
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72 |
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73 | /** Post processes view cells givemŽa number of rays.
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74 | */
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75 | virtual int PostProcess(const ObjectContainer &objects,
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76 | const RayContainer &rays) = 0;
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77 |
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78 | /** Show visualization of the view cells.
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79 | */
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80 | virtual void Visualize(const ObjectContainer &objects,
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81 | const RayContainer &sampleRays) = 0;
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82 |
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83 | /** type of the view cell container.
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84 | */
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85 | virtual int GetType() const = 0;
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86 |
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87 | /** Simulates rendering with the given view cell partition.
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88 | @returns render time statistics
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89 | */
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90 | SimulationStatistics SimulateRendering() const;
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91 |
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92 | /** Load the input viewcells. The input viewcells should be given as a collection |
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93 | of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of |
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94 | the viewcell. The method then builds a BSP tree of these view cells. |
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95 | |
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96 | @param filename file to load |
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97 | @return true on success |
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98 | */ |
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99 | bool LoadViewCells(const string filename);
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100 |
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101 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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102 | @param the base triangle
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103 | @param the height of the newly created view cell
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104 | */
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105 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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106 |
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107 | /** Merges two view cells.
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108 | @note the piercing rays of the front and back will be ordered
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109 | @returns new view cell based on the merging.
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110 | */
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111 | ViewCell *MergeViewCells(ViewCell &front, ViewCell &back) const;
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112 |
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113 | /** Generates view cell of type specified by this manager
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114 | */
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115 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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116 |
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117 | /** Adds a new view cell to the list of predefined view cells.
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118 | */
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119 | void AddViewCell(ViewCell *viewCell);
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120 |
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121 | /** Derive view cells from objects.
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122 | */
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123 | void DeriveViewCells(const ObjectContainer &objects,
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124 | ViewCellContainer &viewCells,
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125 | const int maxViewCells) const;
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126 |
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127 | /** Sets maximal number of samples used for the
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128 | construction of the view cells.
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129 | */
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130 | void SetVisualizationSamples(const int visSamples);
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131 |
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132 | /** Sets maximal number of samples used for the visualization of the view cells.
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133 | */
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134 | void SetConstructionSamples(const int constructionSamples);
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135 |
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136 | /** Sets maximal number of samples used for the post processing of the view cells.
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137 | */
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138 | void SetPostProcessSamples(const int postProcessingSamples);
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139 |
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140 | /** See set.
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141 | */
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142 | int GetVisualizationSamples() const;
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143 |
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144 | /** See set.
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145 | */
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146 | int GetConstructionSamples() const;
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147 |
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148 | /** See set.
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149 | */
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150 | int GetPostProcessSamples() const;
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151 |
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152 | /** Returns true if view cells wer already constructed.
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153 | */
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154 | virtual bool ViewCellsConstructed() const = 0;
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155 |
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156 |
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157 | protected:
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158 |
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159 |
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160 |
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161 | /** Initialises the render time simulator.
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162 | */
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163 | void InitRenderSimulator();
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164 | /////////////////////
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165 |
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166 |
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167 | /// the view cell corresponding to unbounded space
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168 | ViewCell *mUnbounded;
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169 |
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170 | /// Simulates rendering
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171 | RenderSimulator *mRenderSimulator;
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172 |
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173 | /// Loaded view cells
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174 | ViewCellContainer mViewCells;
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175 |
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176 | /// maximum number of samples taken for construction of the view cells
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177 | int mConstructionSamples;
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178 | int mPostProcessSamples;
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179 | int mVisualizationSamples;
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180 |
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181 | //-- thresholds used for view cells merge |
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182 | int mMinPvsDif; |
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183 | int mMinPvs; |
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184 | int mMaxPvs;
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185 | };
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186 |
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187 |
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188 |
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189 | /**
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190 | Manages different higher order operations on the view cells.
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191 | */
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192 | class BspViewCellsManager: public ViewCellsManager
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193 | {
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194 |
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195 | public:
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196 |
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197 | BspViewCellsManager(BspTree *tree, int constructionSamples);
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198 |
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199 | int Construct(const ObjectContainer &objects,
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200 | const VssRayContainer &rays,
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201 | AxisAlignedBox3 *sceneBbox);
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202 |
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203 | int ComputeSampleContributions(Ray &ray, const bool castRay = false);
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204 |
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205 | int PostProcess(const ObjectContainer &objects,
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206 | const RayContainer &rays);
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207 |
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208 | void Visualize(const ObjectContainer &objects,
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209 | const RayContainer &sampleRays);
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210 |
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211 | int GetType() const;
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212 |
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213 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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214 |
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215 | bool ViewCellsConstructed() const;
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216 |
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217 | protected:
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218 |
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219 | /** Merges view cells front and back leaf view cell.
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220 | */
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221 | bool MergeBspLeafViewCells(BspLeaf *front, BspLeaf *back) const;
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222 |
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223 | /** Returns true if front and back leaf should be merged.
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224 | */
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225 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
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226 |
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227 | /// the BSP tree.
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228 | BspTree *mBspTree;
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229 |
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230 |
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231 | private:
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232 |
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233 |
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234 | /** Exports visualization of the BSP splits.
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235 | */
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236 | void ExportSplits(const ObjectContainer &objects, const RayContainer &sampleRays);
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237 |
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238 | /** Exports visualization of the BSP PVS.
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239 | */
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240 | void ExportBspPvs(const ObjectContainer &objects, const RayContainer &sampleRays);
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241 |
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242 | };
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243 |
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244 | /**
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245 | Manages different higher order operations on the KD type view cells.
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246 | */
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247 | class KdViewCellsManager: public ViewCellsManager
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248 | {
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249 |
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250 | public:
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251 |
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252 | KdViewCellsManager(KdTree *tree);
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253 |
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254 | int Construct(const ObjectContainer &objects,
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255 | const VssRayContainer &rays,
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256 | AxisAlignedBox3 *sceneBbox);
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257 |
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258 | int CastRay(const Ray &ray);
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259 |
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260 | int PostProcess(const ObjectContainer &objects,
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261 | const RayContainer &rays);
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262 |
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263 | void Visualize(const ObjectContainer &objects,
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264 | const RayContainer &sampleRays);
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265 |
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266 | int GetType() const;
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267 |
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268 | bool ViewCellsConstructed() const;
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269 |
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270 |
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271 | protected:
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272 |
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273 | KdNode *GetNodeForPvs(KdLeaf *leaf);
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274 |
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275 | int ComputeSampleContributions(Ray &ray, const bool castRay = true);
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276 |
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277 | /// the BSP tree.
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278 | KdTree *mKdTree;
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279 |
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280 | /// depth of the KD tree nodes with represent the view cells
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281 | int mKdPvsDepth;
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282 | };
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283 |
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284 | /**
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285 | Manages different higher order operations on the view cells
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286 | for vsp kd tree view cells.
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287 | */
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288 | class VspKdViewCellsManager: public ViewCellsManager
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289 | {
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290 |
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291 | public:
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292 |
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293 | VspKdViewCellsManager(VspKdTree *vspKdTree, int constructionSamples);
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294 |
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295 | int Construct(const ObjectContainer &objects,
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296 | const VssRayContainer &rays,
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297 | AxisAlignedBox3 *sceneBbox);
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298 |
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299 | int ComputeSampleContributions(Ray &ray, const bool castRay = true);
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300 |
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301 | int PostProcess(const ObjectContainer &objects,
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302 | const RayContainer &rays);
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303 |
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304 | void Visualize(const ObjectContainer &objects,
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305 | const RayContainer &sampleRays);
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306 |
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307 | int GetType() const;
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308 |
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309 | bool ViewCellsConstructed() const;
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310 |
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311 |
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312 | protected:
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313 |
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314 | /// the BSP tree.
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315 | VspKdTree *mVspKdTree;
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316 | };
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317 |
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318 |
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319 |
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320 | /**
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321 | Manages different higher order operations on the view cells.
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322 | */
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323 | class VspBspViewCellsManager: public ViewCellsManager
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324 | {
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325 |
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326 | public:
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327 |
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328 | VspBspViewCellsManager(VspBspTree *tree, int constructionSamples);
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329 |
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330 | int Construct(const ObjectContainer &objects,
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331 | const VssRayContainer &rays,
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332 | AxisAlignedBox3 *sceneBbox);
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333 |
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334 | int ComputeSampleContributions(Ray &ray, const bool castRay = false);
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335 |
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336 | int PostProcess(const ObjectContainer &objects,
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337 | const RayContainer &rays);
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338 |
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339 | void Visualize(const ObjectContainer &objects,
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340 | const RayContainer &sampleRays);
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341 |
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342 | int GetType() const;
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343 |
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344 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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345 |
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346 | bool ViewCellsConstructed() const;
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347 |
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348 | protected:
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349 |
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350 | /** Merges view cells front and back leaf view cell.
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351 | */
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352 | bool MergeVspBspLeafViewCells(VspBspLeaf *front, VspBspLeaf *back) const;
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353 |
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354 | /** Returns true if front and back leaf should be merged.
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355 | */
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356 | bool ShouldMerge(VspBspLeaf *front, VspBspLeaf *back) const;
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357 |
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358 | /// the view space partition BSP tree.
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359 | VspBspTree *mVspBspTree;
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360 |
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361 |
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362 | private:
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363 |
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364 |
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365 | /** Exports visualization of the BSP splits.
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366 | */
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367 | void ExportSplits(const ObjectContainer &objects, const RayContainer &sampleRays);
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368 |
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369 | /** Exports visualization of the BSP PVS.
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370 | */
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371 | void ExportBspPvs(const ObjectContainer &objects, const RayContainer &sampleRays);
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372 |
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373 | };
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374 |
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375 | #endif
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