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 | #include "ViewCell.h"
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8 |
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9 | class ViewCell;
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10 | class Intersectable;
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11 | class RenderSimulator;
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12 | class Renderer;
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13 | class Mesh;
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14 | struct Triangle3;
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15 | class SimulationStatistics;
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16 | class BspTree;
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17 | class KdTree;
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18 | class VspKdTree;
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19 | class VspBspTree;
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20 | class KdNode;
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21 | class KdLeaf;
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22 | class VspKdTree;
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23 | class AxisAlignedBox3;
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24 | class BspLeaf;
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25 | class ViewCellsStatistics;
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26 | class Exporter;
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27 |
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28 | struct BspRay;
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29 |
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30 | /**
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31 | Manages different higher order operations on the view cells.
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32 | */
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33 | class ViewCellsManager
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34 | {
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35 |
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36 | public:
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37 | struct PvsStatistics {
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38 | int minPvs;
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39 | int maxPvs;
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40 | float avgPvs;
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41 | int viewcells;
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42 | };
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43 |
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44 | /// view cell container types
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45 | enum {BSP, KD, VSP_KD, VSP_BSP};
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46 |
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47 | /** Constructor taking the maximal number of samples used for construction
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48 | */
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49 | ViewCellsManager(const int constructionSamples);
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50 |
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51 | ViewCellsManager();
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52 |
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53 | virtual ~ViewCellsManager();
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54 |
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55 | /** Constructs view cell container with a given number of samples.
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56 | */
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57 | virtual int Construct(const ObjectContainer &objects,
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58 | const VssRayContainer &rays) = 0;
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59 |
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60 | /** Computes sample contributions of the rays to the view cells PVS.
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61 |
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62 | @param rays bundle of rays used to find intersections with view cells and
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63 | adding the contribution
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64 | @param castRays true if ray should be cast to gain the information, false if rays
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65 | already hold the view cells intersection information and need not be recast.
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66 | @param sampleContributions returns the number of sample contributions
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67 | @param contributingSamples returns the number of contributingSamples
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68 | */
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69 | void ComputeSampleContributions(const VssRayContainer &rays);
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70 |
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71 |
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72 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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73 | @param ray finds intersections with view cells and holds the contribution
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74 | @param castRay true if ray should be cast to gain the information, false if ray
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75 | is already holding the information and need not be recast.
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76 |
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77 | @returns number of sample contributions
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78 | */
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79 | virtual void ComputeSampleContributions(VssRay &ray);
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80 |
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81 | /** Prints out statistics of the view cells.
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82 | */
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83 | virtual void PrintStatistics(ostream &s) const;
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84 |
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85 | /** Post processes view cells givemŽa number of rays.
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86 | */
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87 | virtual int PostProcess(const ObjectContainer &objects,
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88 | const VssRayContainer &rays) = 0;
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89 |
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90 | /** Show visualization of the view cells.
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91 | */
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92 | virtual void Visualize(const ObjectContainer &objects,
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93 | const VssRayContainer &sampleRays) = 0;
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94 |
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95 | /** type of the view cell container.
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96 | */
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97 | virtual int GetType() const = 0;
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98 |
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99 | /** Load the input viewcells. The input viewcells should be given as a collection
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100 | of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of
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101 | the viewcell. The method then builds a BSP tree of these view cells.
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102 |
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103 | @param filename file to load
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104 | @return true on success
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105 | */
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106 | bool LoadViewCells(const string filename);
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107 |
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108 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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109 | @param the base triangle
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110 | @param the height of the newly created view cell
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111 | */
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112 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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113 |
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114 | /** Merges two view cells.
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115 | @note the piercing rays of the front and back will be ordered
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116 | @returns new view cell based on the merging.
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117 | */
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118 | ViewCell *MergeViewCells(ViewCell &front, ViewCell &back) const;
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119 |
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120 | /** Generates view cell of type specified by this manager
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121 | */
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122 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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123 |
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124 | /** Adds a new view cell to the list of predefined view cells.
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125 | */
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126 | void AddViewCell(ViewCell *viewCell);
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127 |
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128 | /** Derive view cells from objects.
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129 | */
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130 | void DeriveViewCells(const ObjectContainer &objects,
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131 | ViewCellContainer &viewCells,
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132 | const int maxViewCells) const;
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133 |
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134 | /** Sets maximal number of samples used for the
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135 | construction of the view cells.
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136 | */
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137 | void SetVisualizationSamples(const int visSamples);
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138 |
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139 | /** Sets maximal number of samples used for the visualization of the view cells.
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140 | */
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141 | void SetConstructionSamples(const int constructionSamples);
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142 |
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143 | /** Sets maximal number of samples used for the post processing of the view cells.
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144 | */
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145 | void SetPostProcessSamples(const int postProcessingSamples);
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146 |
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147 | /** See set.
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148 | */
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149 | int GetVisualizationSamples() const;
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150 |
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151 | /** See set.
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152 | */
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153 | int GetConstructionSamples() const;
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154 |
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155 | /** See set.
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156 | */
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157 | int GetPostProcessSamples() const;
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158 |
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159 | /** Returns true if view cells wer already constructed.
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160 | */
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161 | virtual bool ViewCellsConstructed() const = 0;
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162 |
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163 | /** cast line segment to get a list of unique viewcells which are intersected
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164 | by this line segment
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165 | */
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166 |
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167 | virtual int CastLineSegment(const Vector3 &origin,
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168 | const Vector3 &termination,
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169 | ViewCellContainer &viewcells
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170 | ) = 0;
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171 |
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172 | virtual void GetPvsStatistics(PvsStatistics &stat);
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173 |
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174 | /** Get a viewcell containing the specified point */
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175 | virtual ViewCell *GetViewCell(const Vector3 &point) = 0;
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176 |
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177 | virtual void PrintPvsStatistics(ostream &s);
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178 |
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179 | /** Returns probability that view point lies in one view cell.
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180 | */
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181 | virtual float GetProbability(ViewCell *viewCell) = 0;
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182 |
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183 | /** Returns render cost of a single view cell given the render cost of an object.
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184 | */
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185 | virtual float GetRendercost(ViewCell *viewCell, float objRendercost) const = 0;
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186 |
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187 | /** Returns vector of loaded / generated view cells.
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188 | */
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189 | ViewCellContainer &GetViewCells();
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190 |
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191 | /** Helper function used to split ray sets uniformly
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192 | into one that is currently used and the other that
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193 | is saved for later processing.
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194 | @param sourceRays the input ray set
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195 | @param maxSize the maximal number of rays that will be used
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196 | @param usedRays returns the used ray set
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197 | @param savedRays if not null, returns the saved ray set
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198 | */
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199 | void GetRaySets(const VssRayContainer &sourceRays,
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200 | const int maxSize,
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201 | VssRayContainer &usedRays,
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202 | VssRayContainer *savedRays = NULL) const;
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203 |
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204 | /** Returns accumulated area of all view cells.
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205 | */
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206 | float GetAccVcArea();
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207 |
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208 | /** Returns area of one view cell.
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209 | */
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210 | virtual float GetArea(ViewCell *viewCell) const;
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211 |
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212 | /** Returns volume of view cells.
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213 | */
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214 | virtual float GetVolume(ViewCell *viewCell) const;
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215 |
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216 | virtual AxisAlignedBox3 GetSceneBbox() const = 0;
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217 |
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218 | /** Sets the current renderer mainly for view cells statistics.
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219 | */
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220 | void SetRenderer(Renderer *renderer);
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221 |
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222 | /** Computes a (random) view point in the valid view space.
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223 | @returns true if valid view point was found
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224 | */
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225 | virtual bool GetViewPoint(Vector3 &viewPoint) const;
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226 |
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227 | /** Returns true if this view point is in the valid view space.
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228 | */
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229 | virtual bool ViewPointValid(const Vector3 &viewPoint) const;
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230 |
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231 | /** Sets a view space boundary.
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232 | */
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233 | void SetViewSpaceBox(const AxisAlignedBox3 &box);
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234 |
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235 | /** Creates mesh for this view cell.
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236 | */
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237 | virtual void CreateMesh(ViewCell *vc) = NULL;
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238 |
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239 | protected:
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240 |
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241 | void ParseEnvironment();
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242 |
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243 | /** Recollects view cells and resets statistics.
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244 | */
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245 | void ResetViewCells();
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246 |
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247 | /** Collects the view cells in the view cell container.
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248 | */
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249 | virtual void CollectViewCells() = 0;
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250 |
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251 | /** Evaluates view cells statistics and stores it in
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252 | mViewCellsStatistics.
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253 | */
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254 | void EvaluateViewCellsStats();
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255 |
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256 |
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257 | //-- helper functions for view cell visualization
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258 |
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259 | /** Exports the view cell partition.
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260 | */
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261 | void ExportViewCells(Exporter *exporter) const;
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262 |
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263 | /** Sets exporter color.
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264 | */
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265 | virtual void ExportColor(Exporter *exporter, ViewCell *vc) const = 0;
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266 |
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267 | /** Exports view cell geometry.
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268 | */
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269 | virtual void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const = 0;
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270 |
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271 | /** Creates meshes from the view cells.
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272 | */
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273 | void CreateViewCellsMeshes();
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274 |
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275 | /// the view cell corresponding to space ouside the valid view space
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276 | //ViewCell *mOutOfBoundsCell;
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277 |
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278 | /// Renders the view cells.
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279 | Renderer *mRenderer;
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280 |
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281 | /// Loaded view cells
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282 | ViewCellContainer mViewCells;
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283 |
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284 | /// maximum number of samples taken for construction of the view cells
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285 | int mConstructionSamples;
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286 | int mPostProcessSamples;
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287 | int mVisualizationSamples;
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288 |
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289 | //-- thresholds used for view cells merge
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290 | int mMinPvsDif;
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291 | int mMinPvs;
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292 | int mMaxPvs;
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293 |
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294 | float mTotalAreaValid;
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295 | float mTotalArea;
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296 |
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297 | ViewCellsStatistics mViewCellsStats;
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298 | /// the scene bounding box
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299 | AxisAlignedBox3 mSceneBox;
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300 |
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301 | MeshContainer mMeshContainer;
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302 |
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303 | //-- visualization options
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304 |
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305 | /// color code for view cells
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306 | int mColorCode;
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307 | bool mExportGeometry;
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308 | bool mExportRays;
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309 | };
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310 |
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311 |
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312 |
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313 | /**
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314 | Manages different higher order operations on the view cells.
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315 | */
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316 | class BspViewCellsManager: public ViewCellsManager
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317 | {
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318 |
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319 | public:
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320 | /** Constructor taking the bsp tree and the number of samples
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321 | used to construct the bsp tree.
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322 | */
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323 | BspViewCellsManager(BspTree *tree, int constructionSamples);
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324 |
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325 | ~BspViewCellsManager();
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326 |
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327 | int Construct(const ObjectContainer &objects,
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328 | const VssRayContainer &rays);
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329 |
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330 |
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331 | int PostProcess(const ObjectContainer &objects,
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332 | const VssRayContainer &rays);
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333 |
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334 | void Visualize(const ObjectContainer &objects,
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335 | const VssRayContainer &sampleRays);
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336 |
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337 | int GetType() const;
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338 |
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339 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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340 |
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341 | bool ViewCellsConstructed() const;
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342 |
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343 | //void PrintStatistics(ostream &s) const;
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344 |
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345 | int CastLineSegment(const Vector3 &origin,
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346 | const Vector3 &termination,
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347 | ViewCellContainer &viewcells);
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348 |
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349 | float GetProbability(ViewCell *viewCell);
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350 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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351 |
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352 | AxisAlignedBox3 GetSceneBbox() const;
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353 |
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354 | /** Get a viewcell containing the specified point */
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355 | ViewCell *GetViewCell(const Vector3 &point);
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356 |
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357 | void CreateMesh(ViewCell *vc);
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358 |
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359 | protected:
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360 |
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361 | void CollectViewCells();
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362 |
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363 | /** Merges view cells front and back leaf view cell.
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364 | */
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365 | bool MergeBspLeafViewCells(BspLeaf *front, BspLeaf *back) const;
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366 |
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367 | /** Returns true if front and back leaf should be merged.
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368 | */
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369 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
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370 |
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371 | void ConstructBspRays(const VssRayContainer &rays,
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372 | const int numSamples);
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373 |
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374 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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375 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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376 |
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377 | /// the BSP tree.
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378 | BspTree *mBspTree;
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379 |
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380 | vector<BspRay *> mBspRays;
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381 |
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382 | private:
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383 |
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384 | /** Exports visualization of the BSP splits.
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385 | */
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386 | void ExportSplits(const ObjectContainer &objects);
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387 |
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388 | /** Exports visualization of the BSP PVS.
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389 | */
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390 | void ExportBspPvs(const ObjectContainer &objects);
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391 |
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392 | };
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393 |
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394 | /**
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395 | Manages different higher order operations on the KD type view cells.
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396 | */
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397 | class KdViewCellsManager: public ViewCellsManager
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398 | {
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399 |
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400 | public:
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401 |
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402 | KdViewCellsManager(KdTree *tree);
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403 |
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404 | int Construct(const ObjectContainer &objects,
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405 | const VssRayContainer &rays);
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406 |
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407 | int CastLineSegment(const Vector3 &origin,
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408 | const Vector3 &termination,
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409 | ViewCellContainer &viewcells);
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410 |
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411 | int PostProcess(const ObjectContainer &objects,
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412 | const VssRayContainer &rays);
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413 |
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414 | void Visualize(const ObjectContainer &objects,
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415 | const VssRayContainer &sampleRays);
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416 |
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417 | int GetType() const;
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418 |
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419 | bool ViewCellsConstructed() const;
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420 |
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421 |
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422 | /** Prints out statistics of this approach.
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423 | */
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424 | // virtual void PrintStatistics(ostream &s) const;
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425 | ViewCell *GetViewCell(const Vector3 &point) { return NULL; }
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426 |
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427 | float GetProbability(ViewCell *viewCell);
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428 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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429 |
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430 | AxisAlignedBox3 GetSceneBbox() const;
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431 |
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432 | void CreateMesh(ViewCell *vc);
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433 |
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434 | protected:
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435 |
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436 | void CollectViewCells();
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437 | KdNode *GetNodeForPvs(KdLeaf *leaf);
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438 |
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439 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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440 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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441 |
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442 | /// the BSP tree.
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443 | KdTree *mKdTree;
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444 |
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445 | /// depth of the KD tree nodes with represent the view cells
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446 | int mKdPvsDepth;
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447 | };
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448 |
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449 | /**
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450 | Manages different higher order operations on the view cells
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451 | for vsp kd tree view cells.
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452 | */
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453 | class VspKdViewCellsManager: public ViewCellsManager
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454 | {
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455 |
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456 | public:
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457 |
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458 | VspKdViewCellsManager(VspKdTree *vspKdTree, int constructionSamples);
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459 |
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460 | int Construct(const ObjectContainer &objects,
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461 | const VssRayContainer &rays);
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462 |
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463 |
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464 | int PostProcess(const ObjectContainer &objects,
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465 | const VssRayContainer &rays);
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466 |
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467 | void Visualize(const ObjectContainer &objects,
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468 | const VssRayContainer &sampleRays);
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469 |
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470 | int GetType() const;
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471 |
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472 | bool ViewCellsConstructed() const;
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473 |
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474 | //virtual void PrintStatistics(ostream &s) const;
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475 |
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476 | ViewCell *GenerateViewCell(Mesh *mesh) const;
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477 |
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478 |
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479 | int CastLineSegment(const Vector3 &origin,
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480 | const Vector3 &termination,
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481 | ViewCellContainer &viewcells);
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482 |
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483 | ViewCell *GetViewCell(const Vector3 &point) { return NULL; }
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484 |
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485 | float GetProbability(ViewCell *viewCell);
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486 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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487 |
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488 | AxisAlignedBox3 GetSceneBbox() const;
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489 |
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490 | void CreateMesh(ViewCell *vc);
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491 |
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492 | protected:
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493 |
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494 | void ExportLeaves(const ObjectContainer &objects,
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495 | const VssRayContainer &sampleRays);
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496 |
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497 | void CollectViewCells();
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498 |
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499 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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500 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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501 |
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502 |
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503 | /// the BSP tree.
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504 | VspKdTree *mVspKdTree;
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505 | };
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506 |
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507 |
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508 |
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509 | /**
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510 | Manages different higher order operations on the view cells.
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511 | */
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512 | class VspBspViewCellsManager: public ViewCellsManager
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513 | {
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514 |
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515 | public:
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516 |
|
---|
517 | VspBspViewCellsManager(VspBspTree *tree, int constructionSamples);
|
---|
518 | ~VspBspViewCellsManager();
|
---|
519 |
|
---|
520 | int Construct(const ObjectContainer &objects,
|
---|
521 | const VssRayContainer &rays);
|
---|
522 |
|
---|
523 | int PostProcess(const ObjectContainer &objects,
|
---|
524 | const VssRayContainer &rays);
|
---|
525 |
|
---|
526 | void Visualize(const ObjectContainer &objects,
|
---|
527 | const VssRayContainer &sampleRays);
|
---|
528 |
|
---|
529 | int GetType() const;
|
---|
530 |
|
---|
531 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
|
---|
532 |
|
---|
533 | bool ViewCellsConstructed() const;
|
---|
534 |
|
---|
535 |
|
---|
536 | int CastLineSegment(const Vector3 &origin,
|
---|
537 | const Vector3 &termination,
|
---|
538 | ViewCellContainer &viewcells);
|
---|
539 |
|
---|
540 | float GetProbability(ViewCell *viewCell);
|
---|
541 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
|
---|
542 |
|
---|
543 | AxisAlignedBox3 GetSceneBbox() const;
|
---|
544 |
|
---|
545 | ViewCell *GetViewCell(const Vector3 &point);
|
---|
546 |
|
---|
547 | bool GetViewPoint(Vector3 &viewPoint) const;
|
---|
548 |
|
---|
549 | bool ViewPointValid(const Vector3 &viewPoint) const;
|
---|
550 |
|
---|
551 | void CreateMesh(ViewCell *vc);
|
---|
552 |
|
---|
553 | protected:
|
---|
554 |
|
---|
555 | /** Merges the view cells.
|
---|
556 | */
|
---|
557 | void MergeViewCells(const VssRayContainer &rays, const ObjectContainer &objects);
|
---|
558 |
|
---|
559 | void RefineViewCells(const VssRayContainer &rays);
|
---|
560 |
|
---|
561 | void CollectViewCells();
|
---|
562 |
|
---|
563 | /** Returns maximal depth difference of view cell
|
---|
564 | leaves in tree.
|
---|
565 | */
|
---|
566 | int GetMaxTreeDiff(ViewCell *vc) const;
|
---|
567 |
|
---|
568 |
|
---|
569 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
|
---|
570 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
|
---|
571 |
|
---|
572 |
|
---|
573 | /// the view space partition BSP tree.
|
---|
574 | VspBspTree *mVspBspTree;
|
---|
575 |
|
---|
576 | private:
|
---|
577 |
|
---|
578 | /** Exports visualization of the BSP splits.
|
---|
579 | */
|
---|
580 | void ExportSplits(const ObjectContainer &objects,
|
---|
581 | const VssRayContainer &rays);
|
---|
582 |
|
---|
583 | /** Exports visualization of the BSP PVS.
|
---|
584 | */
|
---|
585 | void ExportBspPvs(const ObjectContainer &objects,
|
---|
586 | const VssRayContainer &rays);
|
---|
587 |
|
---|
588 | };
|
---|
589 |
|
---|
590 | #endif
|
---|