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 | class Beam;
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28 | class Preprocessor;
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29 |
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30 | struct BspRay;
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31 |
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32 | /**
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33 | Manages different higher order operations on the view cells.
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34 | */
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35 | class ViewCellsManager
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36 | {
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37 |
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38 | public:
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39 | struct PvsStatistics {
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40 | int minPvs;
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41 | int maxPvs;
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42 | float avgPvs;
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43 | int viewcells;
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44 | };
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45 |
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46 | /// view cell container types
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47 | enum {BSP, KD, VSP_KD, VSP_BSP};
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48 |
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49 | /** Constructor taking the maximal number of samples used for construction
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50 | */
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51 | ViewCellsManager(const int constructionSamples);
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52 |
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53 | ViewCellsManager();
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54 |
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55 | virtual ~ViewCellsManager();
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56 |
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57 | /** Constructs view cells container taking a preprocessor
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58 | @returns the output rays (if not null)
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59 | */
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60 | int Construct(Preprocessor *preprocessor, VssRayContainer *outRays = NULL);
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61 |
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62 | /** Constructs view cell container with a given number of samples.
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63 | */
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64 | virtual int Construct(const ObjectContainer &objects,
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65 | const VssRayContainer &rays) = 0;
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66 |
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67 | /** Computes sample contributions of the rays to the view cells PVS.
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68 |
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69 | @param rays bundle of rays used to find intersections with view cells and
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70 | adding the contribution
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71 | @param addRays true if rays should be added to the PVSs of the viewcells they
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72 | intersect */
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73 | float ComputeSampleContributions(const VssRayContainer &rays,
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74 | const bool addContributions = true);
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75 |
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76 | /** Add sample contributions to the viewcells they intersect */
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77 | void AddSampleContributions(const VssRayContainer &rays);
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78 |
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79 |
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80 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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81 | @param ray finds intersections with view cells and holds the contribution
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82 | @param castRay true if ray should be cast to gain the information, false if ray
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83 | is already holding the information and need not be recast.
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84 |
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85 | @returns number of sample contributions
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86 | */
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87 | virtual float ComputeSampleContributions(VssRay &ray, const bool addRays = true);
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88 |
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89 | virtual void AddSampleContributions(VssRay &ray);
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90 |
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91 | /** Prints out statistics of the view cells.
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92 | */
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93 | virtual void PrintStatistics(ostream &s) const;
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94 |
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95 | /** Post processes view cells givemŽa number of rays.
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96 | */
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97 | virtual int PostProcess(const ObjectContainer &objects,
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98 | const VssRayContainer &rays) = 0;
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99 |
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100 | /** Show visualization of the view cells.
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101 | */
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102 | virtual void Visualize(const ObjectContainer &objects,
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103 | const VssRayContainer &sampleRays) = 0;
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104 |
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105 | /** type of the view cell container.
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106 | */
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107 | virtual int GetType() const = 0;
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108 |
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109 | /** Load the input viewcells. The input viewcells should be given as a collection
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110 | of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of
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111 | the viewcell. The method then builds a BSP tree of these view cells.
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112 |
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113 | @param filename file to load
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114 | @return true on success
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115 | */
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116 | virtual bool LoadViewCells(const string filename, ObjectContainer *objects);
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117 |
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118 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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119 | @param the base triangle
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120 | @param the height of the newly created view cell
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121 | */
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122 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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123 |
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124 | /** Merges two view cells.
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125 | @note the piercing rays of the front and back will be ordered
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126 | @returns new view cell based on the merging.
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127 | */
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128 | ViewCell *MergeViewCells(ViewCell &front, ViewCell &back) const;
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129 |
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130 | /** Generates view cell of type specified by this manager
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131 | */
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132 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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133 |
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134 | /** Adds a new view cell to the list of predefined view cells.
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135 | */
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136 | void AddViewCell(ViewCell *viewCell);
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137 |
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138 | /** Derive view cells from objects.
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139 | */
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140 | void DeriveViewCells(const ObjectContainer &objects,
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141 | ViewCellContainer &viewCells,
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142 | const int maxViewCells) const;
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143 |
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144 | /** Sets maximal number of samples used for the
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145 | construction of the view cells.
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146 | */
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147 | void SetVisualizationSamples(const int visSamples);
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148 |
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149 | /** Sets maximal number of samples used for the visualization of the view cells.
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150 | */
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151 | void SetConstructionSamples(const int constructionSamples);
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152 |
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153 | /** Sets maximal number of samples used for the post processing of the view cells.
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154 | */
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155 | void SetPostProcessSamples(const int postProcessingSamples);
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156 |
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157 | /** See set.
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158 | */
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159 | int GetVisualizationSamples() const;
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160 |
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161 | /** See set.
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162 | */
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163 | int GetConstructionSamples() const;
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164 |
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165 | /** See set.
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166 | */
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167 | int GetPostProcessSamples() const;
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168 |
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169 | /** Returns true if view cells wer already constructed.
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170 | */
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171 | virtual bool ViewCellsConstructed() const = 0;
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172 |
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173 | /** cast line segment to get a list of unique viewcells which are intersected
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174 | by this line segment
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175 | */
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176 |
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177 | virtual int CastLineSegment(const Vector3 &origin,
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178 | const Vector3 &termination,
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179 | ViewCellContainer &viewcells
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180 | ) = 0;
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181 |
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182 | virtual void GetPvsStatistics(PvsStatistics &stat);
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183 |
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184 | /** Get a viewcell containing the specified point */
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185 | virtual ViewCell *GetViewCell(const Vector3 &point) const = 0;
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186 |
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187 | virtual void PrintPvsStatistics(ostream &s);
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188 |
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189 | /** Returns probability that view point lies in one view cell.
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190 | */
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191 | virtual float GetProbability(ViewCell *viewCell) = 0;
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192 |
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193 | /** Returns render cost of a single view cell given the render cost of an object.
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194 | */
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195 | virtual float GetRendercost(ViewCell *viewCell, float objRendercost) const = 0;
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196 |
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197 | /** Returns vector of loaded / generated view cells.
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198 | */
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199 | ViewCellContainer &GetViewCells();
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200 |
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201 | /** Helper function used to split ray sets uniformly
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202 | into one that is currently used and the other that
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203 | is saved for later processing.
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204 | @param sourceRays the input ray set
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205 | @param maxSize the maximal number of rays that will be used
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206 | @param usedRays returns the used ray set
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207 | @param savedRays if not null, returns the saved ray set
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208 | */
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209 | void GetRaySets(const VssRayContainer &sourceRays,
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210 | const int maxSize,
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211 | VssRayContainer &usedRays,
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212 | VssRayContainer *savedRays = NULL) const;
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213 |
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214 | /** Returns accumulated area of all view cells.
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215 | */
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216 | float GetAccVcArea();
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217 |
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218 | /** Returns area of one view cell.
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219 | */
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220 | virtual float GetArea(ViewCell *viewCell) const;
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221 |
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222 | /** Returns volume of view cell.
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223 | */
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224 | virtual float GetVolume(ViewCell *viewCell) const;
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225 |
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226 | /** Sets the current renderer mainly for view cells statistics.
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227 | */
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228 | void SetRenderer(Renderer *renderer);
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229 |
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230 | /** Computes a (random) view point in the valid view space.
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231 | @returns true if valid view point was found
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232 | */
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233 | virtual bool GetViewPoint(Vector3 &viewPoint) const;
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234 |
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235 | /** Returns true if this view point is in the valid view space.
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236 | */
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237 | virtual bool ViewPointValid(const Vector3 &viewPoint) const;
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238 |
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239 | /** Sets a view space boundary.
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240 | */
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241 | void SetViewSpaceBox(const AxisAlignedBox3 &box);
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242 |
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243 | AxisAlignedBox3 GetViewSpaceBox() const;
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244 |
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245 | /** Creates mesh for this view cell.
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246 | */
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247 | virtual void CreateMesh(ViewCell *vc) = NULL;
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248 |
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249 | /** Writes view cells to disc.
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250 | */
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251 | virtual bool ExportViewCells(const string filename);
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252 |
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253 | /** Casts beam to collect view cells.
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254 | */
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255 | virtual int CastBeam(Beam &beam);
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256 |
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257 | /** Checks if view cell is considered as valid.
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258 | */
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259 | virtual bool CheckValidity(ViewCell *vc,
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260 | int minPvsSize,
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261 | int maxPvsSize) const;
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262 |
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263 |
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264 | /** Sets validity of view cell
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265 | */
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266 | virtual void SetValidity(ViewCell *vc,
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267 | int minPvsSize,
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268 | int maxPvsSize) const;
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269 |
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270 | /** sets validy of all viewcells */
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271 | virtual void SetValidity(
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272 | int minPvsSize,
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273 | int maxPvsSize) const;
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274 |
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275 | /** set valid viewcells in the range of pvs. sorts the viewcells
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276 | according to the pvs and then pickups those in the ranges */
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277 |
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278 | void
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279 | SetValidityPercentage(
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280 | const float minValid,
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281 | const float maxValid
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282 | );
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283 |
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284 | int
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285 | CountValidViewcells() const;
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286 |
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287 | /** Returns maximal allowed pvs size.
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288 | */
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289 | int GetMaxPvsSize() const;
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290 |
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291 | /** Returns maximal allowed pvs size.
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292 | */
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293 | int GetMinPvsSize() const;
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294 |
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295 | /** Returns maximal ratio. i.e., currentPVs / maxPvs,
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296 | where pvs is still considered valid.
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297 | */
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298 | float GetMaxPvsRatio() const;
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299 |
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300 | /** Exports view cell geometry.
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301 | */
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302 | virtual void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const = 0;
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303 |
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304 | virtual void FinalizeViewCells(const bool createMesh);
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305 |
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306 | protected:
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307 |
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308 | void ParseEnvironment();
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309 |
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310 | /** Creates unique view cell ids.
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311 | */
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312 | void CreateUniqueViewCellIds();
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313 |
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314 | /** Finalizes, i.e., creates mesh, volume, area etc. for the view cell.
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315 | */
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316 | virtual void Finalize(ViewCell *viewCell, const bool createMesh);
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317 |
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318 | /** Recollects view cells and resets statistics.
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319 | */
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320 | void ResetViewCells();
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321 |
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322 | /** Collects the view cells in the view cell container.
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323 | */
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324 | virtual void CollectViewCells() = 0;
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325 |
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326 | /** Evaluates view cells statistics and stores it in
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327 | mViewCellsStatistics.
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328 | */
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329 | void EvaluateViewCellsStats();
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330 |
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331 | //-- helper functions for view cell visualization
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332 |
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333 | /** Exports the view cell partition.
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334 | */
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335 | void ExportViewCellsForViz(Exporter *exporter) const;
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336 |
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337 | /** Sets exporter color.
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338 | */
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339 | virtual void ExportColor(Exporter *exporter, ViewCell *vc) const = 0;
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340 |
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341 |
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342 | virtual float GetViewSpaceVolume();
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343 |
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344 | /** Creates meshes from the view cells.
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345 | */
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346 | void CreateViewCellMeshes();
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347 |
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348 | /**
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349 | Exports single view cell.
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350 | NOTE: should be in exporter!!
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351 | */
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352 | void ExportViewCell(ViewCell *viewCell, ofstream &stream);
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353 |
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354 | /// the view cell corresponding to space ouside the valid view space
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355 | //ViewCell *mOutOfBoundsCell;
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356 |
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357 | /// Renders the view cells.
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358 | Renderer *mRenderer;
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359 |
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360 | /// Loaded view cells
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361 | ViewCellContainer mViewCells;
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362 |
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363 | /// maximum number of samples taken for construction of the view cells
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364 | int mConstructionSamples;
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365 | int mPostProcessSamples;
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366 | int mVisualizationSamples;
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367 |
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368 | float mTotalAreaValid;
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369 | float mTotalArea;
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370 |
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371 | int mMaxPvsSize;
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372 | int mMinPvsSize;
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373 | float mMaxPvsRatio;
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374 |
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375 | ViewCellsStatistics mViewCellsStats;
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376 | /// the scene bounding box
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377 | AxisAlignedBox3 mViewSpaceBox;
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378 | /// holds the view cell meshes
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379 | MeshContainer mMeshContainer;
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380 | /// if view cells should be exported
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381 | bool mExportViewCells;
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382 |
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383 | bool mOnlyValidViewCells;
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384 |
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385 | //-- visualization options
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386 |
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387 | /// color code for view cells
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388 | int mColorCode;
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389 | bool mExportGeometry;
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390 | bool mExportRays;
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391 |
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392 | bool mViewCellsFinished;
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393 | };
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394 |
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395 |
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396 |
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397 | /**
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398 | Manages different higher order operations on the view cells.
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399 | */
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400 | class BspViewCellsManager: public ViewCellsManager
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401 | {
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402 |
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403 | public:
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404 | /** Constructor taking the bsp tree and the number of samples
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405 | used to construct the bsp tree.
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406 | */
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407 | BspViewCellsManager(BspTree *tree, int constructionSamples);
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408 |
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409 | ~BspViewCellsManager();
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410 |
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411 | int Construct(const ObjectContainer &objects,
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412 | const VssRayContainer &rays);
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413 |
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414 | int PostProcess(const ObjectContainer &objects,
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415 | const VssRayContainer &rays);
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416 |
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417 | void Visualize(const ObjectContainer &objects,
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418 | const VssRayContainer &sampleRays);
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419 |
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420 | int GetType() const;
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421 |
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422 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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423 |
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424 | bool ViewCellsConstructed() const;
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425 |
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426 | //void PrintStatistics(ostream &s) const;
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427 |
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428 | int CastLineSegment(const Vector3 &origin,
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429 | const Vector3 &termination,
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430 | ViewCellContainer &viewcells);
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431 |
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432 | float GetProbability(ViewCell *viewCell);
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433 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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434 |
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435 | /** Get a viewcell containing the specified point */
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436 | ViewCell *GetViewCell(const Vector3 &point) const;
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437 |
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438 | void CreateMesh(ViewCell *vc);
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439 |
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440 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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441 |
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442 | protected:
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443 |
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444 | void CollectViewCells();
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445 |
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446 | void ConstructBspRays(const VssRayContainer &rays,
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447 | const int numSamples);
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448 |
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449 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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450 |
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451 |
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452 |
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453 | /// the BSP tree.
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454 | BspTree *mBspTree;
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455 |
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456 | vector<BspRay *> mBspRays;
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457 |
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458 | private:
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459 |
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460 | /** Exports visualization of the BSP splits.
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461 | */
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462 | void ExportSplits(const ObjectContainer &objects);
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463 |
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464 | /** Exports visualization of the BSP PVS.
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465 | */
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466 | void ExportBspPvs(const ObjectContainer &objects);
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467 |
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468 | };
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469 |
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470 | /**
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471 | Manages different higher order operations on the KD type view cells.
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472 | */
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473 | class KdViewCellsManager: public ViewCellsManager
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474 | {
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475 |
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476 | public:
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477 |
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478 | KdViewCellsManager(KdTree *tree);
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479 |
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480 | int Construct(const ObjectContainer &objects,
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481 | const VssRayContainer &rays);
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482 |
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483 | int CastLineSegment(const Vector3 &origin,
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484 | const Vector3 &termination,
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485 | ViewCellContainer &viewcells);
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486 |
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487 | int PostProcess(const ObjectContainer &objects,
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488 | const VssRayContainer &rays);
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489 |
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490 | void Visualize(const ObjectContainer &objects,
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491 | const VssRayContainer &sampleRays);
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492 |
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493 | int GetType() const;
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494 |
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495 | bool ViewCellsConstructed() const;
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496 |
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497 |
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498 | /** Prints out statistics of this approach.
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499 | */
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500 | // virtual void PrintStatistics(ostream &s) const;
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501 | ViewCell *GetViewCell(const Vector3 &point) const { return NULL; }
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502 |
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503 | float GetProbability(ViewCell *viewCell);
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504 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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505 |
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506 | void CreateMesh(ViewCell *vc);
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507 |
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508 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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509 |
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510 | protected:
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511 |
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512 | void CollectViewCells();
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513 | KdNode *GetNodeForPvs(KdLeaf *leaf);
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514 |
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515 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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516 |
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517 |
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518 | /// the BSP tree.
|
---|
519 | KdTree *mKdTree;
|
---|
520 |
|
---|
521 | /// depth of the KD tree nodes with represent the view cells
|
---|
522 | int mKdPvsDepth;
|
---|
523 | };
|
---|
524 |
|
---|
525 | /**
|
---|
526 | Manages different higher order operations on the view cells
|
---|
527 | for vsp kd tree view cells.
|
---|
528 | */
|
---|
529 | class VspKdViewCellsManager: public ViewCellsManager
|
---|
530 | {
|
---|
531 |
|
---|
532 | public:
|
---|
533 |
|
---|
534 | VspKdViewCellsManager(VspKdTree *vspKdTree, int constructionSamples);
|
---|
535 |
|
---|
536 | int Construct(const ObjectContainer &objects,
|
---|
537 | const VssRayContainer &rays);
|
---|
538 |
|
---|
539 |
|
---|
540 | int PostProcess(const ObjectContainer &objects,
|
---|
541 | const VssRayContainer &rays);
|
---|
542 |
|
---|
543 | void Visualize(const ObjectContainer &objects,
|
---|
544 | const VssRayContainer &sampleRays);
|
---|
545 |
|
---|
546 | int GetType() const;
|
---|
547 |
|
---|
548 | bool ViewCellsConstructed() const;
|
---|
549 |
|
---|
550 | //virtual void PrintStatistics(ostream &s) const;
|
---|
551 |
|
---|
552 | ViewCell *GenerateViewCell(Mesh *mesh) const;
|
---|
553 |
|
---|
554 |
|
---|
555 | int CastLineSegment(const Vector3 &origin,
|
---|
556 | const Vector3 &termination,
|
---|
557 | ViewCellContainer &viewcells);
|
---|
558 |
|
---|
559 | ViewCell *GetViewCell(const Vector3 &point) const { return NULL; }
|
---|
560 |
|
---|
561 | float GetProbability(ViewCell *viewCell);
|
---|
562 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
|
---|
563 |
|
---|
564 | void CreateMesh(ViewCell *vc);
|
---|
565 |
|
---|
566 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
|
---|
567 |
|
---|
568 | protected:
|
---|
569 |
|
---|
570 | void ExportLeaves(const ObjectContainer &objects,
|
---|
571 | const VssRayContainer &sampleRays);
|
---|
572 |
|
---|
573 | void CollectViewCells();
|
---|
574 |
|
---|
575 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
|
---|
576 |
|
---|
577 |
|
---|
578 |
|
---|
579 | /// the BSP tree.
|
---|
580 | VspKdTree *mVspKdTree;
|
---|
581 | };
|
---|
582 |
|
---|
583 |
|
---|
584 |
|
---|
585 | /**
|
---|
586 | Manages different higher order operations on the view cells.
|
---|
587 | */
|
---|
588 | class VspBspViewCellsManager: public ViewCellsManager
|
---|
589 | {
|
---|
590 |
|
---|
591 | public:
|
---|
592 |
|
---|
593 | VspBspViewCellsManager(VspBspTree *tree, int constructionSamples);
|
---|
594 | ~VspBspViewCellsManager();
|
---|
595 |
|
---|
596 | int Construct(const ObjectContainer &objects,
|
---|
597 | const VssRayContainer &rays);
|
---|
598 |
|
---|
599 | int PostProcess(const ObjectContainer &objects,
|
---|
600 | const VssRayContainer &rays);
|
---|
601 |
|
---|
602 | void Visualize(const ObjectContainer &objects,
|
---|
603 | const VssRayContainer &sampleRays);
|
---|
604 |
|
---|
605 | int GetType() const;
|
---|
606 |
|
---|
607 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
|
---|
608 |
|
---|
609 | bool ViewCellsConstructed() const;
|
---|
610 |
|
---|
611 |
|
---|
612 | int CastLineSegment(const Vector3 &origin,
|
---|
613 | const Vector3 &termination,
|
---|
614 | ViewCellContainer &viewcells);
|
---|
615 |
|
---|
616 | float GetProbability(ViewCell *viewCell);
|
---|
617 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
|
---|
618 |
|
---|
619 | ViewCell *GetViewCell(const Vector3 &point) const;
|
---|
620 |
|
---|
621 | bool GetViewPoint(Vector3 &viewPoint) const;
|
---|
622 |
|
---|
623 | bool ViewPointValid(const Vector3 &viewPoint) const;
|
---|
624 |
|
---|
625 | void CreateMesh(ViewCell *vc);
|
---|
626 |
|
---|
627 | bool LoadViewCells(const string filename, ObjectContainer *objects);
|
---|
628 | bool ExportViewCells(const string filename);
|
---|
629 |
|
---|
630 | int CastBeam(Beam &beam);
|
---|
631 |
|
---|
632 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
|
---|
633 |
|
---|
634 | //float GetVolume(ViewCell *viewCell) const;
|
---|
635 |
|
---|
636 | void Finalize(ViewCell *viewCell, const bool createMesh);
|
---|
637 |
|
---|
638 | protected:
|
---|
639 |
|
---|
640 | /** Merges the view cells.
|
---|
641 | */
|
---|
642 | void MergeViewCells(const VssRayContainer &rays,
|
---|
643 | const ObjectContainer &objects);
|
---|
644 |
|
---|
645 | void RefineViewCells(const VssRayContainer &rays, const ObjectContainer &objects);
|
---|
646 |
|
---|
647 | void CollectViewCells();
|
---|
648 |
|
---|
649 | /** Returns maximal depth difference of view cell
|
---|
650 | leaves in tree.
|
---|
651 | */
|
---|
652 | int GetMaxTreeDiff(ViewCell *vc) const;
|
---|
653 |
|
---|
654 |
|
---|
655 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
|
---|
656 |
|
---|
657 | /// the view space partition BSP tree.
|
---|
658 | VspBspTree *mVspBspTree;
|
---|
659 |
|
---|
660 | private:
|
---|
661 |
|
---|
662 | /** Exports visualization of the BSP splits.
|
---|
663 | */
|
---|
664 | void ExportSplits(const ObjectContainer &objects,
|
---|
665 | const VssRayContainer &rays);
|
---|
666 |
|
---|
667 | /** Exports visualization of the BSP PVS.
|
---|
668 | */
|
---|
669 | void ExportBspPvs(const ObjectContainer &objects,
|
---|
670 | const VssRayContainer &rays);
|
---|
671 |
|
---|
672 | };
|
---|
673 |
|
---|
674 | #endif
|
---|