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 | #include "ViewCellBsp.h"
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9 |
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10 | namespace GtpVisibilityPreprocessor {
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11 |
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12 | class ViewCell;
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13 | class Intersectable;
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14 | class RenderSimulator;
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15 | class Renderer;
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16 | class Mesh;
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17 | struct Triangle3;
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18 | class SimulationStatistics;
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19 | class BspTree;
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20 | class KdTree;
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21 | class VspOspTree;
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22 | class VspBspTree;
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23 | class KdNode;
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24 | class KdLeaf;
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25 | class AxisAlignedBox3;
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26 | class BspLeaf;
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27 | class ViewCellsStatistics;
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28 | class Exporter;
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29 | class Beam;
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30 | class Preprocessor;
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31 | class ViewCellsTree;
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32 | class MergeCandidate;
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33 | class BoundingBoxConverter;
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34 | class VspTree;
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35 | class OspTree;
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36 | class VspNode;
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37 | class HierarchyManager;
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38 | class BvHierarchy;
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39 | class ViewCellsTree;
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40 |
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41 | struct AxisAlignedPlane;
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42 | struct BspRay;
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43 |
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44 |
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45 | /** Probably Visible Set
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46 | */
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47 | class PrVs
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48 | {
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49 | public:
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50 | /// root of view cells tree
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51 | ViewCell *mViewCell;
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52 |
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53 | // input parameter is the render budget for the PrVs
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54 | float mRenderBudget;
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55 |
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56 | // some characteristic values could be stored as well
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57 | };
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58 |
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59 | /** Manages different higher order operations on the view cells.
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60 | */
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61 | class ViewCellsManager
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62 | {
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63 | public:
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64 | struct PvsStatistics
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65 | {
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66 | int minPvs;
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67 | int maxPvs;
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68 | float avgPvs;
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69 | int viewcells;
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70 | };
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71 |
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72 | /// view cell container types
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73 | enum {BSP, KD, VSP_KD, VSP_BSP, VSP_OSP};
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74 |
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75 | /// render cost evaluation type
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76 | enum {PER_OBJECT, PER_TRIANGLE};
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77 |
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78 | friend class X3dViewCellsParseHandlers;
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79 | /** Default constructor.
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80 | */
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81 | ViewCellsManager(ViewCellsTree *viewCellsTree);
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82 |
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83 | virtual ~ViewCellsManager();
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84 |
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85 | /** Constructs view cells container taking a preprocessor
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86 | @returns the output rays (if not null)
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87 | */
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88 | int Construct(Preprocessor *preprocessor, VssRayContainer *outRays = NULL);
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89 |
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90 | /** Constructs view cell container with a given number of samples.
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91 | */
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92 | virtual int ConstructSubdivision(
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93 | const ObjectContainer &objects,
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94 | const VssRayContainer &rays) = 0;
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95 |
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96 | /** Computes sample contributions of the rays to the view cells PVS.
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97 |
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98 | @param rays bundle of rays used to find intersections with view cells and
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99 | adding the contribution
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100 | @param addRays true if rays should be added to the PVSs of the viewcells they
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101 | intersect
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102 | @param storeViewCells true if view cells should be stored in the ray
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103 | */
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104 | float ComputeSampleContributions(const VssRayContainer &rays,
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105 | const bool addContributions,
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106 | const bool storeViewCells);
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107 |
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108 | /** Add sample contributions to the viewcells they intersect
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109 | */
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110 | void AddSampleContributions(const VssRayContainer &rays);
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111 |
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112 |
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113 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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114 | @param ray finds intersections with view cells and holds the contribution
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115 | @param addSample if sample should be added to the pvs
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116 |
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117 | @returns number of sample contributions
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118 | */
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119 | virtual float ComputeSampleContribution(VssRay &ray,
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120 | const bool addRays,
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121 | const bool storeViewCells);
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122 |
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123 | virtual void AddSampleContributions(VssRay &ray);
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124 |
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125 | /** Prints out statistics of the view cells.
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126 | */
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127 | virtual void PrintStatistics(ostream &s) const;
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128 |
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129 | /** Post processes view cells givemŽa number of rays.
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130 | */
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131 | virtual int PostProcess(const ObjectContainer &objects,
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132 | const VssRayContainer &rays) = 0;
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133 |
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134 | /** Show visualization of the view cells.
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135 | */
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136 | virtual void Visualize(const ObjectContainer &objects,
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137 | const VssRayContainer &sampleRays) = 0;
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138 |
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139 | /** type of the view cell container.
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140 | */
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141 | virtual int GetType() const = 0;
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142 |
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143 | /** Load the input viewcells. The input viewcells should be given as a collection
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144 | of meshes. Each mesh is assume to form a bounded polyhedron
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145 | defining the interior of the viewcell. The view cells manager
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146 | is responsible for building a hierarchy over these view cells.
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147 |
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148 | @param filename file to load
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149 | @return true on success
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150 | */
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151 | virtual bool LoadViewCellsGeometry(const string filename, const bool extrudeBaseTriangle);
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152 |
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153 | /** Merges two view cells.
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154 | @note the piercing rays of the front and back will be ordered
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155 | @returns new view cell based on the merging.
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156 | */
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157 | ViewCellInterior *MergeViewCells(ViewCell *front, ViewCell *back) const;
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158 |
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159 | /** Merges a container of view cells.
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160 | @returns new view cell based on the merging.
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161 | */
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162 | ViewCellInterior *MergeViewCells(ViewCellContainer &children) const;
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163 |
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164 | /** Generates view cell of the type specified by this manager
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165 | */
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166 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const = 0;
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167 |
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168 | /** Constructs view cell from base triangle.
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169 | The view cell is extruded along the normal vector.
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170 | @param the base triangle
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171 | @param the height of the newly created view cell
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172 | */
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173 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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174 |
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175 | /** Sets maximal number of samples used for the
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176 | construction of the view cells.
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177 | */
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178 | void SetVisualizationSamples(const int visSamples);
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179 |
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180 | /** Sets maximal number of samples used for the construction of the view cells.
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181 | */
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182 | void SetConstructionSamples(const int constructionSamples);
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183 |
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184 | /** Sets maximal number of samples used for the visualization of the view cells.
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185 | */
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186 | void SetInitialSamples(const int initialSamples);
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187 |
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188 | /** Sets maximal number of samples used for the post processing of the view cells.
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189 | */
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190 | void SetPostProcessSamples(const int postProcessingSamples);
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191 |
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192 | /** See set.
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193 | */
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194 | int GetVisualizationSamples() const;
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195 |
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196 | /** See set.
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197 | */
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198 | int GetConstructionSamples() const;
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199 |
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200 | /** See set.
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201 | */
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202 | int GetPostProcessSamples() const;
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203 |
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204 | /** Returns true if view cells are already constructed.
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205 | */
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206 | virtual bool ViewCellsConstructed() const = 0;
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207 |
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208 | /** cast line segment to get a list of unique viewcells which are intersected
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209 | by this line segment
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210 | */
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211 |
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212 | virtual int CastLineSegment(const Vector3 &origin,
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213 | const Vector3 &termination,
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214 | ViewCellContainer &viewcells
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215 | ) = 0;
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216 |
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217 | /** Returns a stats about the global pvs.
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218 | */
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219 | virtual void GetPvsStatistics(PvsStatistics &stat);
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220 |
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221 | virtual void GetPrVS(const Vector3 &viewPoint, PrVs &prvs, const float filterWidth);
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222 |
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223 | /** Get a viewcell containing the specified point
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224 | @param active if the active or elementary view cell should be returned.
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225 | */
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226 | virtual ViewCell *GetViewCell(const Vector3 &point, const bool active = false) const = 0;
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227 |
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228 | virtual void PrintPvsStatistics(ostream &s);
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229 |
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230 | /** Updates pvs of the view cell hierarchy if necessary.
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231 | */
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232 | void UpdatePvs();
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233 |
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234 | /** Returns probability that view point lies in one view cell.
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235 | */
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236 | virtual float GetProbability(ViewCell *viewCell) = 0;
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237 |
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238 | /** Returns render cost of a single view cell given the render cost of an object.
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239 | */
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240 | float GetRendercost(ViewCell *viewCell) const;
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241 |
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242 | /** Returns reference to container of loaded / generated view cells.
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243 | */
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244 | ViewCellContainer &GetViewCells();
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245 |
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246 | /** Helper function used to split ray sets uniformly
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247 | into one that is currently used and the other that
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248 | is saved for later processing.
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249 | @param sourceRays the input ray set
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250 | @param maxSize the maximal number of rays that will be used
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251 | @param usedRays returns the used ray set
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252 | @param savedRays if not null, returns the saved ray set
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253 | */
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254 | void GetRaySets(const VssRayContainer &sourceRays,
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255 | const int maxSize,
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256 | VssRayContainer &usedRays,
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257 | VssRayContainer *savedRays = NULL) const;
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258 |
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259 | /** Returns accumulated area of all view cells.
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260 | */
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261 | float GetAccVcArea();
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262 |
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263 | /** Returns area of one view cell.
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264 | */
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265 | virtual float GetArea(ViewCell *viewCell) const;
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266 |
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267 | /** Returns volume of view cell.
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268 | */
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269 | virtual float GetVolume(ViewCell *viewCell) const;
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270 |
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271 | /** Sets the current renderer mainly for view cells statistics.
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272 | */
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273 | void SetRenderer(Renderer *renderer);
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274 |
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275 | /** Computes a (random) view point in the valid view space.
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276 | @returns true if valid view point was found
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277 | */
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278 | virtual bool GetViewPoint(Vector3 &viewPoint) const;
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279 |
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280 | /** Returns true if this view point is in the valid view space.
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281 | */
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282 | virtual bool ViewPointValid(const Vector3 &viewPoint) const;
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283 |
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284 | /** Sets a view space boundary.
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285 | */
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286 | void SetViewSpaceBox(const AxisAlignedBox3 &box);
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287 |
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288 | AxisAlignedBox3 GetViewSpaceBox() const;
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289 |
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290 | /** Creates mesh for this view cell.
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291 | */
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292 | virtual void CreateMesh(ViewCell *vc) = NULL;
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293 |
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294 | /** Writes view cells to disc.
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295 | */
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296 | virtual bool ExportViewCells(const string filename,
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297 | const bool exportPvs,
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298 | const ObjectContainer &objects);
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299 |
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300 | /** Casts beam to collect view cells.
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301 | */
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302 | virtual int CastBeam(Beam &beam);
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303 |
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304 | /** Checks if view cell is considered as valid.
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305 | */
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306 | virtual bool CheckValidity(ViewCell *vc,
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307 | int minPvsSize,
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308 | int maxPvsSize) const;
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309 |
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310 |
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311 | /** Sets validity of view cell
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312 | */
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313 | virtual void SetValidity(ViewCell *vc,
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314 | int minPvsSize,
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315 | int maxPvsSize) const;
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316 |
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317 | /** sets validy of all viewcells
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318 | */
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319 | virtual void SetValidity(int minPvsSize,
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320 | int maxPvsSize) const;
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321 |
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322 |
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323 | /** set valid viewcells in the range of pvs. sorts the viewcells
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324 | according to the pvs and then pickups those in the ranges
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325 | */
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326 | void SetValidityPercentage(const float minValid, const float maxValid);
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327 |
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328 | /** Returns number of valid view cells.
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329 | */
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330 | int CountValidViewcells() const;
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331 |
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332 | /** Returns maximal allowed pvs size.
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333 | */
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334 | int GetMaxPvsSize() const;
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335 |
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336 | /** Returns maximal allowed pvs size.
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337 | */
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338 | int GetMinPvsSize() const;
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339 | /** Returns maximal ratio. i.e., currentPVs / maxPvs,
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340 | where pvs is still considered valid.
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341 | */
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342 | float GetMaxPvsRatio() const;
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343 | /** Exports view cell geometry.
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344 | */
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345 | virtual void ExportViewCellGeometry(
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346 | Exporter *exporter,
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347 | ViewCell *vc,
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348 | const AxisAlignedBox3 *box,
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349 | const AxisAlignedPlane *clipPlane = NULL
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350 | ) const = 0;
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351 |
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352 | /** Brings the view cells into their final state, computes meshes and volume.
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353 | */
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354 | virtual void FinalizeViewCells(const bool createMesh);
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355 |
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356 | /** Evaluates statistics values on view cells.
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357 | */
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358 | void EvaluateRenderStatistics(float &totalRenderCost,
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359 | float &expectedRenderCost,
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360 | float &deviation,
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361 | float &variance,
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362 | int &totalPvs,
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363 | float &avgRenderCost);
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364 |
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365 |
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366 | /** Returns hierarchy of the view cells.
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367 | */
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368 | ViewCellsTree *GetViewCellsTree();
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369 |
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370 | /** Collect candidates for the view cell merge.
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371 | */
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372 | virtual void CollectMergeCandidates(const VssRayContainer &rays,
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373 | vector<MergeCandidate> &candidates);
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374 |
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375 | /** Collects n view cells and stores it as the active view cells.
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376 | */
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377 | void CollectViewCells(const int n);
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378 |
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379 | /** Sets current view cells set to active, i.e., the sampling is done in this view cell set.
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380 | */
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381 | void SetViewCellsActive();
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382 |
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383 | /** Evaluates render cost statistics of current view cell hierarchy.
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384 | */
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385 | virtual void EvalViewCellPartition();
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386 |
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387 | /** Sets maximal size of a view cell filter.
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388 | */
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389 | void SetMaxFilterSize(const int size);
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390 |
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391 | /** Returns maximal filter size.
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392 | */
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393 | int GetMaxFilterSize() const;
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394 |
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395 | /** Deletes interior nodes from the tree which have negative merge cost set (local merge).
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396 | */
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397 | void DeleteLocalMergeTree(ViewCell *vc) const;
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398 |
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399 | /** Evaluautes histogram for a given number of view cells.
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400 | */
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401 | void EvalViewCellHistogram(const string filename, const int nViewCells);
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402 |
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403 | /** Evaluautes histogram for a given number of view cells.
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404 | */
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405 | void EvalViewCellHistogramForPvsSize(const string filename, const int nViewCells);
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406 |
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407 | /** Evaluates the render cost of a view cell.
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408 | */
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409 | float EvalRenderCost(Intersectable *obj) const;
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410 |
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411 | /** Sets pvs size of view cell as a scalar. Used when storing pvs only in the leaves
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412 | of the hierarchy.
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413 | */
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414 | void UpdateScalarPvsSize(ViewCell *vc, const int pvsSize, const int entriesInPvs) const;
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415 |
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416 | /** Returns bounding box of a view cell.
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417 | */
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418 | AxisAlignedBox3 GetViewCellBox(ViewCell *vc);
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419 |
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420 | /** Exports bounding boxes of objects to file.
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421 | */
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422 | bool ExportBoundingBoxes(const string filename, const ObjectContainer &objects) const;
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423 |
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424 | /** Load the bounding boxes into the container.
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425 | */
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426 | bool LoadBoundingBoxes(const string filename, IndexedBoundingBoxContainer &boxes) const;
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427 |
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428 | /** Returns true if pvs should be exported together with the view cells.
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429 | */
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430 | bool GetExportPvs() const;
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431 |
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432 | /////////////////////////////
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433 | // static members
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434 |
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435 | /** Loads view cells from file. The view cells manager is created with
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436 | respect to the loaded view cells.
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437 |
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438 | @param filename the filename of the view cells
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439 | @param objects the scene objects
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440 | @param finalizeViewCells if the view cells should be post processed, i.e.
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441 | a mesh is created representing the geometry
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442 | @param bconverter a conversion routine working with the similarities of bounding
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443 | boxes: if there is a certain similarity of overlap between bounding boxes, two tested
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444 | candidate objects are considered to be the same objects
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445 | @returns the view cells manager if loading was successful, false otherwise
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446 | */
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447 | static ViewCellsManager *LoadViewCells(const string &filename,
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448 | ObjectContainer *objects,
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449 | const bool finalizeViewCells,
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450 | BoundingBoxConverter *bconverter = NULL);
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451 |
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452 |
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453 | ////////////////////////////////////////////////////////7
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454 | // visiblity filter options
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455 |
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456 | // TODO: write own visibiltiy filter class
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457 | void ApplyFilter(KdTree *kdTree,
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458 | const float viewSpaceFilterSize,
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459 | const float spatialFilterSize);
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460 |
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461 | void ApplySpatialFilter(KdTree *kdTree,
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462 | const float spatialFilterSize,
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463 | ObjectPvs &pvs);
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464 |
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465 | void ApplyFilter(ViewCell *viewCell,
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466 | KdTree *kdTree,
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467 | const float viewSpaceFilterSize,
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468 | const float spatialFilterSize,
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469 | ObjectPvs &pvs);
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470 |
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471 | float GetFilterWidth();
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472 |
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473 | float GetAbsFilterWidth();
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474 |
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475 | /** Returns the bounding box of filter width.
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476 | */
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477 | AxisAlignedBox3 GetFilterBBox(const Vector3 &viewPoint, const float width) const;
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478 |
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479 | //////////////////////////////////////////////////////////////////
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480 |
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481 |
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482 | /** Returns true if the view cell is equivalent to a
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483 | node of the spatial hierarchy. This function can be used for merged
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484 | view cell.
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485 | e.g. to see if the spatial tree can be reduced on this location
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486 | note: not implemented
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487 | */
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488 | virtual bool EqualToSpatialNode(ViewCell *viewCell) const;
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489 |
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490 | /** If true, the kd nodes are stored instead of the object pvs.
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491 | */
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492 | void SetStoreKdPvs(const bool storeKdPvs);
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493 |
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494 | /** Returns true if the kd nodes are stored instead of the object pvs.
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495 | **/
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496 | bool GetStoreKdPVs() const;
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497 |
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498 | /** Adds a sample to the pvs of the specified view cell.
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499 | @param obj the hit object
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500 | @param hitPoint the point where the object is hit.
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---|
501 | @param vc the sanpled view cell
|
---|
502 | @param pdf probability of the ray
|
---|
503 | @param contribution the relative pvs contribution
|
---|
504 | @returns true if the sample gives a contribution to the pvs.
|
---|
505 | */
|
---|
506 | virtual bool AddSampleToPvs(
|
---|
507 | Intersectable *obj,
|
---|
508 | const Vector3 &hitPoint,
|
---|
509 | ViewCell *vc,
|
---|
510 | const float pdf,
|
---|
511 | float &contribution) const;
|
---|
512 |
|
---|
513 | /** Exports single view cells for visualization.
|
---|
514 | @param objects the scene objects
|
---|
515 | @param limit the maximal number of output view cells
|
---|
516 | @param sortViewCells if the view cells should be sorted by pvs size
|
---|
517 | @param exportPvs if the pvs should also be exported
|
---|
518 | @param exportRays if sample rays should be exported as well
|
---|
519 | @param maxRays maximum number of rays to export
|
---|
520 | @param prefix the prefix for the output file
|
---|
521 | @param visRays additional rays
|
---|
522 | */
|
---|
523 | virtual
|
---|
524 | void ExportSingleViewCells(
|
---|
525 | const ObjectContainer &objects,
|
---|
526 | const int maxViewCells,
|
---|
527 | const bool sortViewCells,
|
---|
528 | const bool exportPvs,
|
---|
529 | const bool exportRays,
|
---|
530 | const int maxRays,
|
---|
531 | const string prefix,
|
---|
532 | VssRayContainer *visRays = NULL) = NULL;
|
---|
533 |
|
---|
534 |
|
---|
535 | void ViewCellsManager::ResetPvs();
|
---|
536 |
|
---|
537 | Preprocessor *GetPreprocessor() const {
|
---|
538 | return mPreprocessor;
|
---|
539 | }
|
---|
540 |
|
---|
541 | void SetPreprocessor(Preprocessor *p) {
|
---|
542 | mPreprocessor = p;
|
---|
543 | }
|
---|
544 |
|
---|
545 | protected:
|
---|
546 |
|
---|
547 | /** Intersects box with the tree and returns the number of intersected boxes.
|
---|
548 | @returns number of view cells found
|
---|
549 | */
|
---|
550 | virtual int ComputeBoxIntersections(const AxisAlignedBox3 &box,
|
---|
551 | ViewCellContainer &viewCells) const;
|
---|
552 |
|
---|
553 | /** Tests the visibility filter functionality.
|
---|
554 | */
|
---|
555 | virtual void TestFilter(const ObjectContainer &objects) {};
|
---|
556 |
|
---|
557 | /** If the view cells tree was already constructed or not.
|
---|
558 | */
|
---|
559 | bool ViewCellsTreeConstructed() const;
|
---|
560 |
|
---|
561 | /** Requests preprocessor to cast samplesPerPass samples of a specific type.
|
---|
562 | */
|
---|
563 | int CastPassSamples(const int samplesPerPass,
|
---|
564 | const int sampleType,
|
---|
565 | VssRayContainer &vssRays) const;
|
---|
566 |
|
---|
567 | /** Parse the options from the environment file.
|
---|
568 | */
|
---|
569 | void ParseEnvironment();
|
---|
570 |
|
---|
571 | /** Creates unique view cell ids.
|
---|
572 | */
|
---|
573 | void CreateUniqueViewCellIds();
|
---|
574 |
|
---|
575 | /** Finalizes, i.e., creates mesh, volume, area etc. for the view cell.
|
---|
576 | */
|
---|
577 | virtual void Finalize(ViewCell *viewCell, const bool createMesh);
|
---|
578 |
|
---|
579 | /** Recollects view cells and resets statistics.
|
---|
580 | */
|
---|
581 | void ResetViewCells();
|
---|
582 |
|
---|
583 | /** Collects the view cells in the view cell container.
|
---|
584 | */
|
---|
585 | virtual void CollectViewCells() = 0;
|
---|
586 |
|
---|
587 | /** Evaluates view cells statistics and stores it in
|
---|
588 | mViewCellsStatistics.
|
---|
589 | */
|
---|
590 | void EvaluateViewCellsStats();
|
---|
591 |
|
---|
592 |
|
---|
593 | ///////////////////////
|
---|
594 | //-- helper functions for view cell visualization
|
---|
595 |
|
---|
596 | /** Exports the view cell partition.
|
---|
597 | */
|
---|
598 | void ExportViewCellsForViz(
|
---|
599 | Exporter *exporter,
|
---|
600 | const AxisAlignedBox3 *box,
|
---|
601 | const AxisAlignedPlane *clipPlane = NULL,
|
---|
602 | const bool colorCode = 0) const;
|
---|
603 |
|
---|
604 | /** Sets exporter color.
|
---|
605 | */
|
---|
606 | virtual void ExportColor(Exporter *exporter, ViewCell *vc, const bool colorCode) const;
|
---|
607 |
|
---|
608 | /** Creates meshes from the view cells.
|
---|
609 | */
|
---|
610 | void CreateViewCellMeshes();
|
---|
611 |
|
---|
612 | /** Creates clip plane for visualization.
|
---|
613 | */
|
---|
614 | void CreateClipPlane();
|
---|
615 |
|
---|
616 | AxisAlignedPlane *GetClipPlane();
|
---|
617 |
|
---|
618 | void ExportMergedViewCells(const ObjectContainer &objects);
|
---|
619 |
|
---|
620 | ///////////////////////
|
---|
621 |
|
---|
622 | /** Returns volume of the view space.
|
---|
623 | */
|
---|
624 | virtual float GetViewSpaceVolume();
|
---|
625 | /** Prepares the view cells for sampling after loading them from disc.
|
---|
626 | */
|
---|
627 | virtual void PrepareLoadedViewCells() {};
|
---|
628 | /** Constructs local view cell merge hierarchy.
|
---|
629 | */
|
---|
630 | ViewCell *ConstructLocalMergeTree(ViewCell *currentViewCell,
|
---|
631 | const ViewCellContainer &viewCells);
|
---|
632 |
|
---|
633 | /** Constructs local view cell merge hierarchy based solely on similarity with the
|
---|
634 | current viewcell
|
---|
635 | */
|
---|
636 | ViewCell *ConstructLocalMergeTree2(ViewCell *currentViewCell,
|
---|
637 | const ViewCellContainer &viewCells);
|
---|
638 |
|
---|
639 | /** Updates pvs of all view cells for statistical evaluation after some more sampling
|
---|
640 | */
|
---|
641 | void UpdatePvsForEvaluation(ViewCell *root, ObjectPvs &pvs);
|
---|
642 |
|
---|
643 |
|
---|
644 |
|
---|
645 | ////////////////////////////////////////////////
|
---|
646 |
|
---|
647 | Preprocessor *mPreprocessor;
|
---|
648 | /// if bounding boxes should be exported together with the view cells
|
---|
649 | bool mExportBboxesForPvs;
|
---|
650 | /// the clip plane for visualization
|
---|
651 | AxisAlignedPlane mClipPlaneForViz;
|
---|
652 | /// if the visualization is using the clip plane
|
---|
653 | bool mUseClipPlaneForViz;
|
---|
654 | /// Renders the view cells.
|
---|
655 | Renderer *mRenderer;
|
---|
656 | /// Loaded view cells
|
---|
657 | ViewCellContainer mViewCells;
|
---|
658 | /// the view cell hierarchy (i.e., the logical description of view cells)
|
---|
659 | ViewCellsTree *mViewCellsTree;
|
---|
660 |
|
---|
661 | /** if the values in the view cell leaves and the interiors are up to date
|
---|
662 | this is meant for lazy storing of the pvs, where only a scalar indicating
|
---|
663 | pvs size is stored in interiors and not the pvs itself.
|
---|
664 | */
|
---|
665 | bool mViewCellPvsIsUpdated;
|
---|
666 |
|
---|
667 | /// maximum number of samples for the view cell construction
|
---|
668 | int mConstructionSamples;
|
---|
669 | int mSamplesPerPass;
|
---|
670 | int mInitialSamples;
|
---|
671 | int mPostProcessSamples;
|
---|
672 | int mVisualizationSamples;
|
---|
673 |
|
---|
674 | float mTotalAreaValid;
|
---|
675 | float mTotalArea;
|
---|
676 |
|
---|
677 | int mMaxPvsSize;
|
---|
678 | int mMinPvsSize;
|
---|
679 | float mMaxPvsRatio;
|
---|
680 |
|
---|
681 | int mSamplingType;
|
---|
682 | int mEvaluationSamplingType;
|
---|
683 | int mNumActiveViewCells;
|
---|
684 | bool mCompressViewCells;
|
---|
685 |
|
---|
686 | /// holds the current view cell statistics
|
---|
687 | ViewCellsStatistics mCurrentViewCellsStats;
|
---|
688 | /// the scene bounding box
|
---|
689 | AxisAlignedBox3 mViewSpaceBox;
|
---|
690 |
|
---|
691 | /// if view cells should be exported
|
---|
692 | bool mExportViewCells;
|
---|
693 |
|
---|
694 | // if only valid view cells should be considered for processing
|
---|
695 | bool mOnlyValidViewCells;
|
---|
696 |
|
---|
697 | /// if rays should be used to collect merge candidates
|
---|
698 | bool mUseRaysForMerge;
|
---|
699 |
|
---|
700 | /// if there should be an additional merge step after the subdivision
|
---|
701 | bool mMergeViewCells;
|
---|
702 |
|
---|
703 | /// the width of the box filter
|
---|
704 | float mFilterWidth;
|
---|
705 | /// Maximal size of the filter in terms of contributing view cells
|
---|
706 | int mMaxFilterSize;
|
---|
707 |
|
---|
708 | // only for debugging
|
---|
709 | VssRayContainer storedRays;
|
---|
710 | //////////////////
|
---|
711 | //-- visualization options
|
---|
712 |
|
---|
713 | /// color code for view cells visualization
|
---|
714 | bool mShowVisualization;
|
---|
715 | int mColorCode;
|
---|
716 | bool mExportGeometry;
|
---|
717 | bool mExportRays;
|
---|
718 | bool mViewCellsFinished;
|
---|
719 | bool mEvaluateViewCells;
|
---|
720 | int mRenderCostEvaluationType;
|
---|
721 |
|
---|
722 | /// if pvs should be exported with view cells
|
---|
723 | bool mExportPvs;
|
---|
724 |
|
---|
725 | bool mUsePredefinedViewCells;
|
---|
726 | };
|
---|
727 |
|
---|
728 |
|
---|
729 | /** Manages different higher order operations on the view cells.
|
---|
730 | */
|
---|
731 | class BspViewCellsManager: public ViewCellsManager
|
---|
732 | {
|
---|
733 |
|
---|
734 | public:
|
---|
735 | /** Constructor taking the bsp tree and the number of samples
|
---|
736 | used to construct the bsp tree.
|
---|
737 | */
|
---|
738 | BspViewCellsManager(ViewCellsTree *viewCellsTree, BspTree *tree);
|
---|
739 |
|
---|
740 | ~BspViewCellsManager();
|
---|
741 |
|
---|
742 | int ConstructSubdivision(const ObjectContainer &objects,
|
---|
743 | const VssRayContainer &rays);
|
---|
744 |
|
---|
745 | int PostProcess(const ObjectContainer &objects,
|
---|
746 | const VssRayContainer &rays);
|
---|
747 |
|
---|
748 | void Visualize(const ObjectContainer &objects,
|
---|
749 | const VssRayContainer &sampleRays);
|
---|
750 |
|
---|
751 | int GetType() const;
|
---|
752 |
|
---|
753 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
|
---|
754 |
|
---|
755 | bool ViewCellsConstructed() const;
|
---|
756 |
|
---|
757 | //void PrintStatistics(ostream &s) const;
|
---|
758 |
|
---|
759 | int CastLineSegment(const Vector3 &origin,
|
---|
760 | const Vector3 &termination,
|
---|
761 | ViewCellContainer &viewcells);
|
---|
762 |
|
---|
763 | /** Returns the probability that the view point lies
|
---|
764 | in this view cells.
|
---|
765 | */
|
---|
766 | float GetProbability(ViewCell *viewCell);
|
---|
767 |
|
---|
768 | /** Get a viewcell containing the specified point.
|
---|
769 | */
|
---|
770 | ViewCell *GetViewCell(const Vector3 &point, const bool active = false) const;
|
---|
771 |
|
---|
772 | /** Creates mesh for this view cell.
|
---|
773 | */
|
---|
774 | void CreateMesh(ViewCell *vc);
|
---|
775 |
|
---|
776 | void ExportViewCellGeometry(Exporter *exporter,
|
---|
777 | ViewCell *vc,
|
---|
778 | const AxisAlignedBox3 *box,
|
---|
779 | const AxisAlignedPlane *clipPlane = NULL
|
---|
780 | ) const;
|
---|
781 |
|
---|
782 | void CollectMergeCandidates(const VssRayContainer &rays,
|
---|
783 | vector<MergeCandidate> &candidates);
|
---|
784 |
|
---|
785 | void Finalize(ViewCell *viewCell, const bool createMesh);
|
---|
786 |
|
---|
787 | bool ExportViewCells(const string filename,
|
---|
788 | const bool exportPvs,
|
---|
789 | const ObjectContainer &objects);
|
---|
790 |
|
---|
791 | /** Constructs merge hierarchy which corresponds to the spatial hierarchy.
|
---|
792 | */
|
---|
793 | ViewCell *ConstructSpatialMergeTree(BspNode *root);
|
---|
794 |
|
---|
795 | void ExportSingleViewCells(
|
---|
796 | const ObjectContainer &objects,
|
---|
797 | const int maxViewCells,
|
---|
798 | const bool sortViewCells,
|
---|
799 | const bool exportPvs,
|
---|
800 | const bool exportRays,
|
---|
801 | const int maxRays,
|
---|
802 | const string prefix,
|
---|
803 | VssRayContainer *visRays = NULL);
|
---|
804 |
|
---|
805 | protected:
|
---|
806 |
|
---|
807 | void CollectViewCells();
|
---|
808 |
|
---|
809 | /// the BSP tree.
|
---|
810 | BspTree *mBspTree;
|
---|
811 | vector<BspRay *> mBspRays;
|
---|
812 |
|
---|
813 | private:
|
---|
814 |
|
---|
815 | /** Constructs a spatial merge tree only 2 levels deep.
|
---|
816 | */
|
---|
817 | ViewCell *ConstructDummyMergeTree(BspNode *root);
|
---|
818 |
|
---|
819 | /** Exports visualization of the BSP splits.
|
---|
820 | */
|
---|
821 | void ExportSplits(const ObjectContainer &objects);
|
---|
822 |
|
---|
823 | /** test if subdivision is valid in terms of volume / area.
|
---|
824 | */
|
---|
825 | void TestSubdivision();
|
---|
826 | };
|
---|
827 |
|
---|
828 |
|
---|
829 | /**
|
---|
830 | Manages different higher order operations on the KD type view cells.
|
---|
831 | */
|
---|
832 | class KdViewCellsManager: public ViewCellsManager
|
---|
833 | {
|
---|
834 |
|
---|
835 | public:
|
---|
836 |
|
---|
837 | KdViewCellsManager(ViewCellsTree *viewCellsTree, KdTree *tree);
|
---|
838 |
|
---|
839 | int ConstructSubdivision(const ObjectContainer &objects,
|
---|
840 | const VssRayContainer &rays);
|
---|
841 |
|
---|
842 | int CastLineSegment(const Vector3 &origin,
|
---|
843 | const Vector3 &termination,
|
---|
844 | ViewCellContainer &viewcells);
|
---|
845 |
|
---|
846 | int PostProcess(const ObjectContainer &objects,
|
---|
847 | const VssRayContainer &rays);
|
---|
848 |
|
---|
849 | void Visualize(const ObjectContainer &objects,
|
---|
850 | const VssRayContainer &sampleRays);
|
---|
851 |
|
---|
852 | int GetType() const;
|
---|
853 |
|
---|
854 | bool ViewCellsConstructed() const;
|
---|
855 |
|
---|
856 | ViewCell *GenerateViewCell(Mesh *mesh) const;
|
---|
857 |
|
---|
858 | /** Prints out statistics of this approach.
|
---|
859 | */
|
---|
860 | // virtual void PrintStatistics(ostream &s) const;
|
---|
861 | ViewCell *GetViewCell(const Vector3 &point, const bool active = false) const
|
---|
862 | { return NULL; }
|
---|
863 |
|
---|
864 | float GetProbability(ViewCell *viewCell);
|
---|
865 |
|
---|
866 | void CreateMesh(ViewCell *vc);
|
---|
867 |
|
---|
868 | void ExportViewCellGeometry(
|
---|
869 | Exporter *exporter,
|
---|
870 | ViewCell *vc,
|
---|
871 | const AxisAlignedBox3 *box,
|
---|
872 | const AxisAlignedPlane *clipPlane = NULL
|
---|
873 | ) const;
|
---|
874 |
|
---|
875 |
|
---|
876 | void CollectMergeCandidates(const VssRayContainer &rays,
|
---|
877 | vector<MergeCandidate> &candidates);
|
---|
878 |
|
---|
879 | void ExportSingleViewCells(
|
---|
880 | const ObjectContainer &objects,
|
---|
881 | const int maxViewCells,
|
---|
882 | const bool sortViewCells,
|
---|
883 | const bool exportPvs,
|
---|
884 | const bool exportRays,
|
---|
885 | const int maxRays,
|
---|
886 | const string prefix,
|
---|
887 | VssRayContainer *visRays = NULL);
|
---|
888 |
|
---|
889 | protected:
|
---|
890 |
|
---|
891 | /** Collects view cells from a hierarchy.
|
---|
892 | */
|
---|
893 | void CollectViewCells();
|
---|
894 |
|
---|
895 | KdNode *GetNodeForPvs(KdLeaf *leaf);
|
---|
896 |
|
---|
897 | ////////////////////////////////////////
|
---|
898 |
|
---|
899 | /// the BSP tree.
|
---|
900 | KdTree *mKdTree;
|
---|
901 |
|
---|
902 | /// depth of the KD tree nodes with represent the view cells
|
---|
903 | int mKdPvsDepth;
|
---|
904 |
|
---|
905 |
|
---|
906 | };
|
---|
907 |
|
---|
908 |
|
---|
909 | /** Manages different higher order operations on the view cells.
|
---|
910 | */
|
---|
911 | class VspBspViewCellsManager: public ViewCellsManager
|
---|
912 | {
|
---|
913 |
|
---|
914 | public:
|
---|
915 |
|
---|
916 | VspBspViewCellsManager(ViewCellsTree *viewCellsTree, VspBspTree *tree);
|
---|
917 | ~VspBspViewCellsManager();
|
---|
918 |
|
---|
919 | int ConstructSubdivision(const ObjectContainer &objects,
|
---|
920 | const VssRayContainer &rays);
|
---|
921 |
|
---|
922 | int PostProcess(const ObjectContainer &objects,
|
---|
923 | const VssRayContainer &rays);
|
---|
924 |
|
---|
925 | void Visualize(const ObjectContainer &objects,
|
---|
926 | const VssRayContainer &sampleRays);
|
---|
927 |
|
---|
928 | int GetType() const;
|
---|
929 |
|
---|
930 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
|
---|
931 |
|
---|
932 | bool ViewCellsConstructed() const;
|
---|
933 |
|
---|
934 |
|
---|
935 | int CastLineSegment(const Vector3 &origin,
|
---|
936 | const Vector3 &termination,
|
---|
937 | ViewCellContainer &viewcells);
|
---|
938 |
|
---|
939 | float GetProbability(ViewCell *viewCell);
|
---|
940 |
|
---|
941 | ViewCell *GetViewCell(const Vector3 &point, const bool active = false) const;
|
---|
942 |
|
---|
943 | bool GetViewPoint(Vector3 &viewPoint) const;
|
---|
944 |
|
---|
945 | bool ViewPointValid(const Vector3 &viewPoint) const;
|
---|
946 |
|
---|
947 | void CreateMesh(ViewCell *vc);
|
---|
948 |
|
---|
949 | bool ExportViewCells(
|
---|
950 | const string filename,
|
---|
951 | const bool exportPvs,
|
---|
952 | const ObjectContainer &objects);
|
---|
953 |
|
---|
954 | int CastBeam(Beam &beam);
|
---|
955 |
|
---|
956 | void ExportViewCellGeometry(
|
---|
957 | Exporter *exporter,
|
---|
958 | ViewCell *vc,
|
---|
959 | const AxisAlignedBox3 *box,
|
---|
960 | const AxisAlignedPlane *clipPlane = NULL
|
---|
961 | ) const;
|
---|
962 |
|
---|
963 |
|
---|
964 | void Finalize(ViewCell *viewCell, const bool createMesh);
|
---|
965 |
|
---|
966 | void CollectMergeCandidates(const VssRayContainer &rays, vector<MergeCandidate> &candidates);
|
---|
967 |
|
---|
968 | /** Returns true if this view cell is equivavalent to a spatial node.
|
---|
969 | */
|
---|
970 | bool EqualToSpatialNode(ViewCell *viewCell) const;
|
---|
971 |
|
---|
972 |
|
---|
973 | void ExportSingleViewCells(
|
---|
974 | const ObjectContainer &objects,
|
---|
975 | const int maxViewCells,
|
---|
976 | const bool sortViewCells,
|
---|
977 | const bool exportPvs,
|
---|
978 | const bool exportRays,
|
---|
979 | const int maxRays,
|
---|
980 | const string prefix,
|
---|
981 | VssRayContainer *visRays = NULL);
|
---|
982 |
|
---|
983 |
|
---|
984 | protected:
|
---|
985 |
|
---|
986 | int ComputeBoxIntersections(const AxisAlignedBox3 &box, ViewCellContainer &viewCells) const;
|
---|
987 |
|
---|
988 | /** Returns node of the spatial hierarchy corresponding to the view cell
|
---|
989 | if such a node exists.
|
---|
990 | */
|
---|
991 | BspNode *GetSpatialNode(ViewCell *viewCell) const;
|
---|
992 |
|
---|
993 | /** Merges view cells according to some criteria
|
---|
994 | */
|
---|
995 | void MergeViewCells(const VssRayContainer &rays,
|
---|
996 | const ObjectContainer &objects);
|
---|
997 |
|
---|
998 | void RefineViewCells(const VssRayContainer &rays, const ObjectContainer &objects);
|
---|
999 |
|
---|
1000 | void CollectViewCells();
|
---|
1001 |
|
---|
1002 | /** Returns maximal depth difference of view cell
|
---|
1003 | leaves in tree.
|
---|
1004 | */
|
---|
1005 | int GetMaxTreeDiff(ViewCell *vc) const;
|
---|
1006 |
|
---|
1007 | /** Prepare view cells for use after loading them from disc.
|
---|
1008 | */
|
---|
1009 | void PrepareLoadedViewCells();
|
---|
1010 |
|
---|
1011 | /** Constructs merge hierarchy which corresponds to the spatial hierarchy.
|
---|
1012 | */
|
---|
1013 | ViewCell *ConstructSpatialMergeTree(BspNode *root);
|
---|
1014 |
|
---|
1015 | /// HACK for testing visibility filter functionality
|
---|
1016 | void TestFilter(const ObjectContainer &objects);
|
---|
1017 |
|
---|
1018 | /** Visualization of the pvs difference to exact visubility using
|
---|
1019 | from point queries.
|
---|
1020 | */
|
---|
1021 | void VisualizeWithFromPointQueries();
|
---|
1022 |
|
---|
1023 | /** Evaluate from point queries for the current scene.
|
---|
1024 | */
|
---|
1025 | void EvalFromPointQueries();
|
---|
1026 |
|
---|
1027 | /** Exports visualization of the BSP splits.
|
---|
1028 | */
|
---|
1029 | void ExportSplits(const ObjectContainer &objects,
|
---|
1030 | const VssRayContainer &rays);
|
---|
1031 |
|
---|
1032 | /// the view space partition BSP tree.
|
---|
1033 | VspBspTree *mVspBspTree;
|
---|
1034 |
|
---|
1035 |
|
---|
1036 | private:
|
---|
1037 |
|
---|
1038 | /** test if subdivision is valid in terms of volume / area.
|
---|
1039 | */
|
---|
1040 | void TestSubdivision();
|
---|
1041 | };
|
---|
1042 |
|
---|
1043 | #define TEST_EVALUATION 1
|
---|
1044 |
|
---|
1045 | /**
|
---|
1046 | Manages different higher order operations on the view cells.
|
---|
1047 | */
|
---|
1048 | class VspOspViewCellsManager: public ViewCellsManager
|
---|
1049 | {
|
---|
1050 |
|
---|
1051 | public:
|
---|
1052 |
|
---|
1053 | VspOspViewCellsManager(ViewCellsTree *vcTree, HierarchyManager *hm);
|
---|
1054 |
|
---|
1055 | ~VspOspViewCellsManager();
|
---|
1056 |
|
---|
1057 | int ConstructSubdivision(const ObjectContainer &objects,
|
---|
1058 | const VssRayContainer &rays);
|
---|
1059 |
|
---|
1060 | int PostProcess(const ObjectContainer &objects,
|
---|
1061 | const VssRayContainer &rays);
|
---|
1062 |
|
---|
1063 | void Visualize(const ObjectContainer &objects,
|
---|
1064 | const VssRayContainer &sampleRays);
|
---|
1065 |
|
---|
1066 | int GetType() const;
|
---|
1067 |
|
---|
1068 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
|
---|
1069 |
|
---|
1070 | bool ViewCellsConstructed() const;
|
---|
1071 |
|
---|
1072 |
|
---|
1073 | int CastLineSegment(const Vector3 &origin,
|
---|
1074 | const Vector3 &termination,
|
---|
1075 | ViewCellContainer &viewcells);
|
---|
1076 |
|
---|
1077 | float GetProbability(ViewCell *viewCell);
|
---|
1078 |
|
---|
1079 | ViewCell *GetViewCell(const Vector3 &point, const bool active = false) const;
|
---|
1080 |
|
---|
1081 | bool GetViewPoint(Vector3 &viewPoint) const;
|
---|
1082 |
|
---|
1083 | bool ViewPointValid(const Vector3 &viewPoint) const;
|
---|
1084 |
|
---|
1085 | void CreateMesh(ViewCell *vc);
|
---|
1086 |
|
---|
1087 | bool ExportViewCells(const string filename,
|
---|
1088 | const bool exportPvs,
|
---|
1089 | const ObjectContainer &objects);
|
---|
1090 |
|
---|
1091 | int CastBeam(Beam &beam);
|
---|
1092 |
|
---|
1093 | void Finalize(ViewCell *viewCell, const bool createMesh);
|
---|
1094 |
|
---|
1095 | /** Stores sample contribution for kd cells or objects.
|
---|
1096 | */
|
---|
1097 | virtual float ComputeSampleContribution(VssRay &ray,
|
---|
1098 | const bool addRays,
|
---|
1099 | const bool storeViewCells);
|
---|
1100 |
|
---|
1101 | ViewCellsManager *LoadViewCells(const string &filename,
|
---|
1102 | ObjectContainer *objects,
|
---|
1103 | const bool finalizeViewCells,
|
---|
1104 | BoundingBoxConverter *bconverter);
|
---|
1105 |
|
---|
1106 | bool AddSampleToPvs(
|
---|
1107 | Intersectable *obj,
|
---|
1108 | const Vector3 &hitPoint,
|
---|
1109 | ViewCell *vc,
|
---|
1110 | const float pdf,
|
---|
1111 | float &contribution) const;
|
---|
1112 |
|
---|
1113 | void ExportSingleViewCells(
|
---|
1114 | const ObjectContainer &objects,
|
---|
1115 | const int maxViewCells,
|
---|
1116 | const bool sortViewCells,
|
---|
1117 | const bool exportPvs,
|
---|
1118 | const bool exportRays,
|
---|
1119 | const int maxRays,
|
---|
1120 | const string prefix,
|
---|
1121 | VssRayContainer *visRays = NULL);
|
---|
1122 |
|
---|
1123 | protected:
|
---|
1124 |
|
---|
1125 | #if TEST_EVALUATION
|
---|
1126 | virtual void EvalViewCellPartition();
|
---|
1127 | #endif
|
---|
1128 |
|
---|
1129 | /** Exports view cell geometry.
|
---|
1130 | */
|
---|
1131 | void ExportViewCellGeometry(
|
---|
1132 | Exporter *exporter,
|
---|
1133 | ViewCell *vc,
|
---|
1134 | const AxisAlignedBox3 *box,
|
---|
1135 | const AxisAlignedPlane *clipPlane = NULL
|
---|
1136 | ) const;
|
---|
1137 |
|
---|
1138 | int ComputeBoxIntersections(
|
---|
1139 | const AxisAlignedBox3 &box,
|
---|
1140 | ViewCellContainer &viewCells) const;
|
---|
1141 |
|
---|
1142 | void CollectViewCells();
|
---|
1143 |
|
---|
1144 | /** Prepare view cells for use after loading them from disc.
|
---|
1145 | */
|
---|
1146 | void PrepareLoadedViewCells();
|
---|
1147 |
|
---|
1148 | /** Constructs merge hierarchy which corresponds to the spatial hierarchy.
|
---|
1149 | */
|
---|
1150 | ViewCell *ConstructSpatialMergeTree(VspNode *root);
|
---|
1151 |
|
---|
1152 | /** Exports visualization of the PVS.
|
---|
1153 | */
|
---|
1154 | void ExportPvs(
|
---|
1155 | const ObjectContainer &objects,
|
---|
1156 | const VssRayContainer &rays);
|
---|
1157 |
|
---|
1158 |
|
---|
1159 | /////////////////////////////////////////
|
---|
1160 |
|
---|
1161 | HierarchyManager *mHierarchyManager;
|
---|
1162 | };
|
---|
1163 |
|
---|
1164 |
|
---|
1165 | }
|
---|
1166 |
|
---|
1167 | #endif
|
---|