1 | // ================================================================
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2 | // $Id$
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3 | // ****************************************************************
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4 | //
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5 | // Initial coding by
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6 | /**
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7 | @author Jiri Bittner
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8 | */
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9 |
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10 | #ifndef __RSSTREE_H__
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11 | #define __RSSTREE_H__
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12 |
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13 | // Standard headers
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14 | #include <iomanip>
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15 | #include <vector>
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16 | #include <functional>
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17 | #include <stack>
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18 |
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19 |
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20 | // User headers
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21 | #include "VssRay.h"
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22 | #include "AxisAlignedBox3.h"
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23 | #include "Halton.h"
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24 | #include "Beam.h"
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25 | #include "Statistics.h"
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26 | #include "Ray.h"
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27 |
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28 | #include "Containers.h"
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29 | #include "SamplingStrategy.h"
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30 |
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31 | namespace GtpVisibilityPreprocessor {
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32 |
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33 | #define USE_KDNODE_VECTORS 1
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34 | #define _RSS_STATISTICS
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35 | #define _RSS_TRAVERSAL_STATISTICS
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36 |
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37 |
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38 | // --------------------------------------------------------------
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39 | // Static statistics for kd-tree search
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40 | // --------------------------------------------------------------
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41 | class RssStatistics :
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42 | public StatisticsBase
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43 | {
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44 | public:
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45 | // total number of nodes
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46 | int nodes;
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47 | // number of leaves
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48 | int leaves;
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49 | // number of splits along each of the axes
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50 | int splits[7];
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51 | // totals number of rays
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52 | int rays;
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53 | // initial size of the pvs
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54 | int initialPvsSize;
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55 | // total number of query domains
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56 | int queryDomains;
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57 | // total number of ray references
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58 | int rayRefs;
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59 |
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60 | // max depth nodes
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61 | int maxDepthNodes;
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62 | // max depth nodes
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63 | int minPvsNodes;
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64 | int minRaysNodes;
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65 | // max ray contribution nodes
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66 | int maxRayContribNodes;
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67 | // max depth nodes
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68 | int minSizeNodes;
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69 | int maxCostRatioNodes;
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70 |
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71 | // max number of rays per node
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72 | int maxRayRefs;
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73 | // number of dynamically added ray refs
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74 | int addedRayRefs;
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75 | // number of dynamically removed ray refs
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76 | int removedRayRefs;
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77 |
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78 |
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79 |
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80 | // dynamically updated values
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81 | float avgPvsSize;
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82 | float avgRays;
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83 | float avgRayContribution;
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84 | float avgPvsEntropy;
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85 | float avgRayLengthEntropy;
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86 | float avgImportance;
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87 |
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88 | float avgWeightedRayContribution;
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89 |
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90 | // Constructor
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91 | RssStatistics() {
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92 | Reset();
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93 | }
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94 |
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95 | int Nodes() const {return nodes;}
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96 | int Interior() const { return nodes/2; }
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97 | int Leaves() const { return Nodes() - Interior(); }
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98 |
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99 | void Reset() {
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100 | nodes = 0;
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101 | for (int i=0; i<7; i++)
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102 | splits[i] = 0;
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103 | rays = queryDomains = 0;
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104 | rayRefs = 0;
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105 | maxDepthNodes = 0;
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106 | minPvsNodes = 0;
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107 | minRaysNodes = 0;
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108 | maxRayRefs = 0;
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109 | addedRayRefs = removedRayRefs = 0;
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110 | initialPvsSize = 0;
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111 | maxRayContribNodes = 0;
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112 | minSizeNodes = 0;
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113 | maxCostRatioNodes = 0;
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114 | }
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115 |
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116 |
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117 | void
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118 | Print(std::ostream &app) const;
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119 |
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120 | friend std::ostream &operator<<(std::ostream &s, const RssStatistics &stat) {
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121 | stat.Print(s);
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122 | return s;
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123 | }
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124 |
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125 | };
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126 |
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127 |
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128 |
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129 |
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130 | class RssTreeInterior;
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131 |
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132 |
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133 | // --------------------------------------------------------------
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134 | // KD-tree node - abstract class
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135 | // --------------------------------------------------------------
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136 | class RssTreeNode
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137 | {
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138 | public:
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139 |
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140 |
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141 | struct RayInfo
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142 | {
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143 | // pointer to the actual ray
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144 | VssRay *mRay;
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145 |
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146 | RayInfo():mRay(NULL) {}
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147 |
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148 | RayInfo(VssRay *r):mRay(r)
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149 | {}
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150 |
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151 | enum {
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152 | SOURCE_RAY = 0,
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153 | TERMINATION_RAY,
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154 | PASSING_RAY,
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155 | CONTAINED_RAY
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156 | };
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157 |
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158 | int GetRayClass() const {
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159 | return SOURCE_RAY;
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160 | }
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161 |
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162 | friend bool operator<(const RayInfo &a, const RayInfo &b) {
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163 | return a.mRay < b.mRay;
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164 | }
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165 |
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166 |
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167 | #define USE_ORIGIN 1
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168 |
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169 | Vector3 GetOrigin() const {
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170 | #if USE_ORIGIN
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171 | return mRay->GetOrigin();
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172 | #else
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173 | return mRay->GetTermination();
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174 | #endif
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175 | }
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176 |
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177 | Vector3 GetTermination() const {
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178 | #if USE_ORIGIN
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179 | return mRay->GetTermination();
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180 | #else
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181 | return mRay->GetOrigin();
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182 | #endif
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183 | }
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184 |
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185 | float GetOrigin(const int axis) const {
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186 | #if USE_ORIGIN
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187 | return mRay->GetOrigin(axis);
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188 | #else
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189 | return mRay->GetTermination(axis);
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190 | #endif
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191 | }
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192 |
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193 | Vector3 GetDir() const {
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194 | #if USE_ORIGIN
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195 | return mRay->GetDir();
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196 | #else
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197 | return -mRay->GetDir();
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198 | #endif
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199 | }
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200 |
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201 | float GetDirParametrization(const int axis) const {
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202 | #if USE_ORIGIN
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203 | return mRay->GetDirParametrization(axis);
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204 | #else
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205 | return mRay->GetOpositeDirParametrization(axis);
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206 | #endif
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207 | }
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208 |
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209 |
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210 | // Vector3 GetTermination() const {
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211 | // return mRay->GetOrigin();
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212 | // }
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213 |
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214 | // float GetTermination(const int axis) const {
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215 | // return mRay->GetTermination(axis);
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216 | // }
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217 |
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218 | Intersectable *GetObject() const {
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219 | #if USE_ORIGIN
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220 | return mRay->mTerminationObject;
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221 | #else
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222 | return mRay->mOriginObject;
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223 | #endif
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224 | }
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225 |
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226 | Intersectable *GetSourceObject() const {
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227 | #if USE_ORIGIN
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228 | return mRay->mOriginObject;
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229 | #else
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230 | return mRay->mTerminationObject;
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231 | #endif
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232 | }
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233 |
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234 | // Vector3 Extrap(const float t) const {
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235 | // return mRay->Extrap(t);
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236 | // }
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237 |
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238 | int
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239 | ComputeRaySide(const int axis,
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240 | const float position
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241 | ) const {
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242 |
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243 | // only compare the side of the origin
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244 | float rpos = (axis < 3) ? GetOrigin(axis) : GetDirParametrization(axis - 3);
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245 | return (rpos <= position) ? -1 : 1;
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246 | }
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247 |
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248 | static bool GreaterWeightedPvsContribution(const RayInfo &a,
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249 | const RayInfo &b) {
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250 | return a.mRay->mWeightedPvsContribution > b.mRay->mWeightedPvsContribution;
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251 | }
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252 |
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253 | static float Distance(const RayInfo &a,
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254 | const RayInfo &b)
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255 | {
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256 | if (a.mRay->mTerminationObject == b.mRay->mTerminationObject)
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257 | return MAX_FLOAT;
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258 |
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259 | return Min(a.mRay->SqrDistance(b.GetTermination()),
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260 | b.mRay->SqrDistance(a.GetTermination()));
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261 | }
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262 |
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263 |
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264 | static float SqrDistance5D(const RayInfo &a,
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265 | const RayInfo &b,
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266 | const Vector3 &spatialDerivative,
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267 | const Vector3 &directionalDerivative
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268 | )
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269 | {
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270 | Vector3 spatialDiff = b.GetOrigin() - a.GetOrigin();
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271 | Vector3 directionalDiff = b.GetDir() - a.GetDir();
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272 |
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273 | return DotProd(spatialDiff, spatialDerivative) +
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274 | DotProd(directionalDiff, directionalDerivative);
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275 | }
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276 |
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277 |
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278 | };
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279 |
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280 | struct SilhouetteRays {
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281 | RayInfo *a;
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282 | RayInfo *b;
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283 | SilhouetteRays() {}
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284 | SilhouetteRays(RayInfo *_a, RayInfo *_b):a(_a), b(_b) {
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285 | }
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286 | };
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287 |
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288 | typedef vector<RayInfo> RayInfoContainer;
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289 |
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290 | enum { EInterior, ELeaf };
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291 |
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292 | /////////////////////////////////
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293 | // The actual data goes here
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294 |
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295 | // link to the parent
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296 | RssTreeInterior *parent;
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297 |
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298 | enum {SPLIT_X=0, SPLIT_Y, SPLIT_Z, SPLIT_DIRX, SPLIT_DIRY, SPLIT_DIRZ};
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299 |
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300 | // splitting axis
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301 | char axis;
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302 |
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303 | // depth
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304 | unsigned char depth;
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305 |
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306 | // short depth;
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307 | //
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308 | /////////////////////////////////
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309 |
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310 |
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311 | // the bbox of the node
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312 | AxisAlignedBox3 bbox;
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313 |
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314 | // the bbox of the node
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315 | AxisAlignedBox3 dirBBox;
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316 |
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317 | // evaluated importance of this node
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318 | float mImportance;
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319 |
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320 | // importance requires update
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321 | //bool mRequiresUpdate;
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322 |
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323 | inline RssTreeNode(RssTreeInterior *p);
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324 |
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325 |
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326 | virtual ~RssTreeNode() {};
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327 | virtual int Type() const = 0;
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328 |
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329 |
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330 | bool IsLeaf() const { return axis == -1; }
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331 |
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332 | virtual void Print(std::ostream &s) const = 0;
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333 |
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334 | virtual int GetAccessTime() {
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335 | return 0x7FFFFFF;
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336 | }
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337 |
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338 | float GetImportance() const;
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339 |
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340 |
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341 | };
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342 |
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343 | // --------------------------------------------------------------
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344 | // KD-tree node - interior node
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345 | // --------------------------------------------------------------
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346 | class RssTreeInterior :
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347 | public RssTreeNode
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348 | {
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349 | public:
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350 | // plane in world coordinates
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351 | float position;
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352 |
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353 | // pointers to children
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354 | RssTreeNode *back, *front;
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355 |
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356 |
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357 | // data for caching
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358 | long accesses;
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359 | long lastAccessTime;
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360 |
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361 | RssTreeInterior(RssTreeInterior *p):RssTreeNode(p),
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362 | back(NULL),
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363 | front(NULL),
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364 | accesses(0),
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365 | lastAccessTime(-1)
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366 | { }
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367 |
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368 | virtual int GetAccessTime() {
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369 | return lastAccessTime;
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370 | }
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371 |
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372 | float GetRelativePosition() const {
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373 | if (axis < 3)
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374 | return (position - bbox.Min(axis))/bbox.Size(axis);
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375 | else
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376 | return (position - dirBBox.Min(axis-3))/dirBBox.Size(axis-3);
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377 | }
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378 |
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379 | void SetupChildLinks(RssTreeNode *b, RssTreeNode *f) {
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380 | back = b;
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381 | front = f;
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382 | b->parent = f->parent = this;
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383 | }
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384 |
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385 | void ReplaceChildLink(RssTreeNode *oldChild, RssTreeNode *newChild) {
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386 | if (back == oldChild)
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387 | back = newChild;
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388 | else
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389 | front = newChild;
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390 | }
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391 |
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392 | virtual int Type() const { return EInterior; }
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393 |
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394 | virtual ~RssTreeInterior() {
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395 | if (back)
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396 | delete back;
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397 | if (front)
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398 | delete front;
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399 | }
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400 |
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401 | virtual void Print(std::ostream &s) const {
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402 | if (axis == 0)
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403 | s<<"x ";
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404 | else
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405 | if (axis == 1)
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406 | s<<"y ";
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407 | else
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408 | s<<"z ";
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409 | s<<position<<" ";
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410 | back->Print(s);
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411 | front->Print(s);
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412 | }
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413 |
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414 |
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415 |
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416 | int ComputeRaySide(const
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417 | RayInfo &rayData
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418 | ) {
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419 | return rayData.ComputeRaySide(axis, position);
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420 | }
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421 |
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422 | };
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423 |
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424 |
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425 | // --------------------------------------------------------------
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426 | // KD-tree node - leaf node
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427 | // --------------------------------------------------------------
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428 | class RssTreeLeaf :
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429 | public RssTreeNode
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430 | {
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431 | private:
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432 | int mPvsSize;
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433 | public:
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434 | static int mailID;
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435 | int mailbox;
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436 |
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437 | RayInfoContainer rays;
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438 | int mTotalRays;
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439 | float mTotalContribution;
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440 |
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441 | bool mValidPvs;
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442 |
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443 | Beam mBeam;
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444 |
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445 | RssTreeLeaf(RssTreeInterior *p,
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446 | const int nRays
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447 | ):RssTreeNode(p), rays(), mPvsSize(0), mTotalRays(0),
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448 | mTotalContribution(0.0f), mValidPvs(false) {
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449 | rays.reserve(nRays);
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450 | }
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451 |
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452 | virtual ~RssTreeLeaf() { }
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453 |
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454 | virtual int Type() const { return ELeaf; }
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455 |
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456 | virtual void Print(std::ostream &s) const {
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457 | s<<
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458 | "L: rays="<<(int)rays.size()<<
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459 | " pvs="<<mPvsSize<<" importance="<<mImportance<<std::endl;
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460 | };
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461 |
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462 | void AddRay(const RayInfo &data) {
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463 | mValidPvs = false;
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464 | rays.push_back(data);
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465 | mTotalRays++;
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466 | mTotalContribution +=
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467 | ABS_CONTRIBUTION_WEIGHT*data.mRay->mPvsContribution +
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468 | (1.0f - ABS_CONTRIBUTION_WEIGHT)*data.mRay->mRelativePvsContribution;
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469 | data.mRay->Ref();
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470 | }
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471 |
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472 | int GetPvsSize() const {
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473 | return mPvsSize;
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474 | }
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475 |
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476 | void SetPvsSize(const int s) {
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477 | mPvsSize = s;
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478 | mValidPvs = true;
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479 | }
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480 |
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481 |
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482 | float
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483 | ComputePvsEntropy() const;
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484 |
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485 | float
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486 | ComputeRayLengthEntropy() const;
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487 |
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488 | float
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489 | ComputeRayTerminationEntropy() const;
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490 |
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491 |
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492 | float
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493 | ComputeEntropyImportance() const;
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494 |
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495 | float
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496 | ComputeRayContributionImportance() const;
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497 |
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498 | void Mail() { mailbox = mailID; }
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499 | static void NewMail() { mailID++; }
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500 | bool Mailed() const { return mailbox == mailID; }
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501 |
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502 | bool Mailed(const int mail) {
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503 | return mailbox >= mailID + mail;
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504 | }
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505 |
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506 | float GetAvgRayContribution() const {
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507 | return GetPvsSize()/((float)rays.size() + Limits::Small);
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508 | }
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509 |
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510 |
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511 | float GetSqrRayContribution() const {
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512 | return sqr(GetPvsSize()/((float)rays.size() + Limits::Small));
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513 | }
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514 |
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515 | // comparator for the
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516 | struct less_contribution : public
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517 | std::binary_function<const RssTreeLeaf *, const RssTreeLeaf *, bool> {
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518 |
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519 | bool operator()(const RssTreeLeaf * a, const RssTreeLeaf *b) {
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520 | return a->GetAvgRayContribution() < b->GetAvgRayContribution();
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521 | }
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522 | };
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523 |
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524 | struct greater_contribution : public
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525 | std::binary_function<const RssTreeLeaf *, const RssTreeLeaf *, bool> {
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526 |
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527 | bool operator()(const RssTreeLeaf * a, const RssTreeLeaf *b) {
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528 | return a->GetAvgRayContribution() > b->GetAvgRayContribution();
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529 | }
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530 | };
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531 |
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532 | friend bool GreaterContribution(const RssTreeLeaf * a, const RssTreeLeaf *b) {
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533 | return a->GetAvgRayContribution() > b->GetAvgRayContribution();
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534 | }
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535 |
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536 |
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537 | };
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538 |
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539 | // Inline functions
|
---|
540 | inline
|
---|
541 | RssTreeNode::RssTreeNode(RssTreeInterior *p):
|
---|
542 | parent(p), axis(-1), depth(p ? p->depth + 1 : 0) {}
|
---|
543 |
|
---|
544 |
|
---|
545 |
|
---|
546 | // ---------------------------------------------------------------
|
---|
547 | // Main LSDS search class
|
---|
548 | // ---------------------------------------------------------------
|
---|
549 | class RssTree
|
---|
550 | {
|
---|
551 | struct TraversalData
|
---|
552 | {
|
---|
553 | RssTreeNode *node;
|
---|
554 | AxisAlignedBox3 bbox;
|
---|
555 | int depth;
|
---|
556 | float priority;
|
---|
557 |
|
---|
558 | TraversalData() {}
|
---|
559 |
|
---|
560 | TraversalData(RssTreeNode *n, const float p):
|
---|
561 | node(n), priority(p)
|
---|
562 | {}
|
---|
563 |
|
---|
564 | TraversalData(RssTreeNode *n,
|
---|
565 | const AxisAlignedBox3 &b,
|
---|
566 | const int d):
|
---|
567 | node(n), bbox(b), depth(d) {}
|
---|
568 |
|
---|
569 |
|
---|
570 | // comparator for the
|
---|
571 | struct less_priority : public
|
---|
572 | std::binary_function<const TraversalData, const TraversalData, bool> {
|
---|
573 |
|
---|
574 | bool operator()(const TraversalData a, const TraversalData b) {
|
---|
575 | return a.priority < b.priority;
|
---|
576 | }
|
---|
577 |
|
---|
578 | };
|
---|
579 |
|
---|
580 | // ~TraversalData() {}
|
---|
581 | // TraversalData(const TraversalData &s):node(s.node), bbox(s.bbox), depth(s.depth) {}
|
---|
582 |
|
---|
583 | friend bool operator<(const TraversalData &a,
|
---|
584 | const TraversalData &b) {
|
---|
585 | // return a.node->queries.size() < b.node->queries.size();
|
---|
586 | RssTreeLeaf *leafa = (RssTreeLeaf *) a.node;
|
---|
587 | RssTreeLeaf *leafb = (RssTreeLeaf *) b.node;
|
---|
588 | #if 0
|
---|
589 | return
|
---|
590 | leafa->rays.size()*a.bbox.GetVolume()
|
---|
591 | <
|
---|
592 | leafb->rays.size()*b.bbox.GetVolume();
|
---|
593 | #endif
|
---|
594 | #if 0
|
---|
595 | return
|
---|
596 | leafa->GetPvsSize()*a.bbox.GetVolume()
|
---|
597 | <
|
---|
598 | leafb->GetPvsSize()*b.bbox.GetVolume();
|
---|
599 | #endif
|
---|
600 | #if 0
|
---|
601 | return
|
---|
602 | leafa->GetPvsSize()
|
---|
603 | <
|
---|
604 | leafb->GetPvsSize();
|
---|
605 | #endif
|
---|
606 | #if 0
|
---|
607 | return
|
---|
608 | leafa->GetPvsSize()/(leafa->rays.size()+1)
|
---|
609 | >
|
---|
610 | leafb->GetPvsSize()/(leafb->rays.size()+1);
|
---|
611 | #endif
|
---|
612 | #if 1
|
---|
613 | return
|
---|
614 | leafa->GetPvsSize()*leafa->rays.size()
|
---|
615 | <
|
---|
616 | leafb->GetPvsSize()*leafb->rays.size();
|
---|
617 | #endif
|
---|
618 | }
|
---|
619 | };
|
---|
620 |
|
---|
621 | // simplified data for ray traversal only...
|
---|
622 |
|
---|
623 | struct RayTraversalData {
|
---|
624 |
|
---|
625 | RssTreeNode::RayInfo rayData;
|
---|
626 | RssTreeNode *node;
|
---|
627 |
|
---|
628 | RayTraversalData() {}
|
---|
629 | RayTraversalData(RssTreeNode *n,
|
---|
630 | const RssTreeNode::RayInfo &data):
|
---|
631 | rayData(data), node(n) {}
|
---|
632 | };
|
---|
633 |
|
---|
634 | public:
|
---|
635 | /////////////////////////////
|
---|
636 | // The core pointer
|
---|
637 | vector<RssTreeNode *> mRoots;
|
---|
638 |
|
---|
639 |
|
---|
640 | HaltonSequence mHalton;
|
---|
641 |
|
---|
642 |
|
---|
643 | /////////////////////////////
|
---|
644 | // Basic properties
|
---|
645 |
|
---|
646 | // total number of nodes of the tree
|
---|
647 | int nodes;
|
---|
648 |
|
---|
649 | // axis aligned bounding box of the scene
|
---|
650 | AxisAlignedBox3 bbox;
|
---|
651 |
|
---|
652 | // axis aligned bounding box of directions
|
---|
653 | AxisAlignedBox3 dirBBox;
|
---|
654 |
|
---|
655 | // forced bounding box for from viewcell visibility
|
---|
656 | // AxisAlignedBox3 *mForcedBoundingBox;
|
---|
657 |
|
---|
658 | /////////////////////////////
|
---|
659 | // Construction parameters
|
---|
660 |
|
---|
661 | // epsilon used for the construction
|
---|
662 | float epsilon;
|
---|
663 |
|
---|
664 | // ratio between traversal and intersection costs
|
---|
665 | float ct_div_ci;
|
---|
666 | // max depth of the tree
|
---|
667 | int termMaxDepth;
|
---|
668 | // minimal ratio of the volume of the cell and the query volume
|
---|
669 | float termMinSize;
|
---|
670 |
|
---|
671 | // minimal pvs per node to still get subdivided
|
---|
672 | int termMinPvs;
|
---|
673 |
|
---|
674 | // minimal ray number per node to still get subdivided
|
---|
675 | int termMinRays;
|
---|
676 |
|
---|
677 | // maximal cost ration to subdivide a node
|
---|
678 | float termMaxCostRatio;
|
---|
679 |
|
---|
680 | // maximal contribution per ray to subdivide the node
|
---|
681 | float termMaxRayContribution;
|
---|
682 |
|
---|
683 | // randomized construction
|
---|
684 | bool randomize;
|
---|
685 |
|
---|
686 | // use a root per object in the tree
|
---|
687 | bool mPerObjectTree;
|
---|
688 |
|
---|
689 | // type of the splitting to use fo rthe tree construction
|
---|
690 | enum {ESplitRegular, ESplitHeuristic, ESplitHybrid };
|
---|
691 | int splitType;
|
---|
692 |
|
---|
693 | bool mSplitUseOnlyDrivingAxis;
|
---|
694 |
|
---|
695 |
|
---|
696 | // interleave directional and spatial splits based on their costs
|
---|
697 | // if false directional splits are only performed after spatial splits
|
---|
698 | bool mInterleaveDirSplits;
|
---|
699 |
|
---|
700 | // depth at which directional splits are performed if mInterleaveDirSplits is false
|
---|
701 | int mDirSplitDepth;
|
---|
702 |
|
---|
703 | // depth till which the regular splits are applied for hybrid split type
|
---|
704 | int mHybridDepth;
|
---|
705 |
|
---|
706 | // maximal number of rays maintained in the rss tree
|
---|
707 | int mMaxRays;
|
---|
708 |
|
---|
709 | // maximal size of the box on which the refdir splitting can be performed
|
---|
710 | // (relative to the scene bbox
|
---|
711 | float refDirBoxMaxSize;
|
---|
712 |
|
---|
713 | // maximum alovable memory in MB
|
---|
714 | float maxTotalMemory;
|
---|
715 |
|
---|
716 | // maximum alovable memory for static kd tree in MB
|
---|
717 | float maxStaticMemory;
|
---|
718 |
|
---|
719 | // this is used during the construction depending
|
---|
720 | // on the type of the tree and queries...
|
---|
721 | float maxMemory;
|
---|
722 |
|
---|
723 |
|
---|
724 | // minimal acess time for collapse
|
---|
725 | int accessTimeThreshold;
|
---|
726 |
|
---|
727 | // minimal depth at which to perform collapse
|
---|
728 | int minCollapseDepth;
|
---|
729 |
|
---|
730 | bool mImportanceBasedCost;
|
---|
731 |
|
---|
732 | // sampling pass
|
---|
733 | int mCurrentPass;
|
---|
734 |
|
---|
735 | // reusable array of split candidates
|
---|
736 | vector<SortableEntry> *splitCandidates;
|
---|
737 | /////////////////////////////
|
---|
738 |
|
---|
739 | RssStatistics stat;
|
---|
740 |
|
---|
741 |
|
---|
742 | RssTree();
|
---|
743 | virtual ~RssTree();
|
---|
744 |
|
---|
745 | virtual void
|
---|
746 | Construct(
|
---|
747 | ObjectContainer &objects,
|
---|
748 | VssRayContainer &rays
|
---|
749 | // AxisAlignedBox3 *forcedBoundingBox = NULL
|
---|
750 | );
|
---|
751 |
|
---|
752 | // incemental construction
|
---|
753 | virtual void UpdateRays(VssRayContainer &remove,
|
---|
754 | VssRayContainer &add
|
---|
755 | );
|
---|
756 |
|
---|
757 | virtual void AddRays(
|
---|
758 | VssRayContainer &add
|
---|
759 | )
|
---|
760 | {
|
---|
761 | VssRayContainer remove;
|
---|
762 | UpdateRays(remove, add);
|
---|
763 | }
|
---|
764 |
|
---|
765 |
|
---|
766 |
|
---|
767 | RssTreeNode *
|
---|
768 | Locate(const Vector3 &v);
|
---|
769 |
|
---|
770 | RssTreeNode *
|
---|
771 | SubdivideNode(RssTreeLeaf *leaf,
|
---|
772 | const AxisAlignedBox3 &box,
|
---|
773 | AxisAlignedBox3 &backBox,
|
---|
774 | AxisAlignedBox3 &frontBox
|
---|
775 | );
|
---|
776 |
|
---|
777 | RssTreeNode *
|
---|
778 | Subdivide(const TraversalData &tdata);
|
---|
779 |
|
---|
780 |
|
---|
781 | void
|
---|
782 | SortSubdivisionCandidates(
|
---|
783 | RssTreeLeaf *node,
|
---|
784 | const int axis
|
---|
785 | );
|
---|
786 |
|
---|
787 |
|
---|
788 | // return memory usage in MB
|
---|
789 | float GetMemUsage() const {
|
---|
790 | return
|
---|
791 | (sizeof(RssTree) +
|
---|
792 | stat.Leaves()*sizeof(RssTreeLeaf) +
|
---|
793 | stat.Interior()*sizeof(RssTreeInterior) +
|
---|
794 | stat.rayRefs*sizeof(RssTreeNode::RayInfo))/(1024.0f*1024.0f);
|
---|
795 | }
|
---|
796 |
|
---|
797 | float GetRayMemUsage() const {
|
---|
798 | return
|
---|
799 | stat.rays*(sizeof(VssRay))/(1024.0f*1024.0f);
|
---|
800 | }
|
---|
801 |
|
---|
802 | struct SplitInfo {
|
---|
803 |
|
---|
804 | int axis;
|
---|
805 | float position;
|
---|
806 | float costRatio;
|
---|
807 |
|
---|
808 | int rays;
|
---|
809 | int raysBack;
|
---|
810 | int raysFront;
|
---|
811 |
|
---|
812 | int pvs;
|
---|
813 | int pvsBack;
|
---|
814 | int pvsFront;
|
---|
815 |
|
---|
816 | float contribution;
|
---|
817 | float contributionBack;
|
---|
818 | float contributionFront;
|
---|
819 |
|
---|
820 | int viewCells;
|
---|
821 | int viewCellsBack;
|
---|
822 | int viewCellsFront;
|
---|
823 |
|
---|
824 | float volume;
|
---|
825 | float volumeBack;
|
---|
826 | float volumeFront;
|
---|
827 |
|
---|
828 | };
|
---|
829 |
|
---|
830 | void
|
---|
831 | BestCostRatio(
|
---|
832 | RssTreeLeaf *node,
|
---|
833 | SplitInfo &info
|
---|
834 | // int &axis,
|
---|
835 | // float &position,
|
---|
836 | // int &raysBack,
|
---|
837 | // int &raysFront,
|
---|
838 | // int &pvsBack,
|
---|
839 | // int &pvsFront
|
---|
840 | );
|
---|
841 |
|
---|
842 |
|
---|
843 | void
|
---|
844 | EvalCostRatio(
|
---|
845 | RssTreeLeaf *node,
|
---|
846 | SplitInfo &info
|
---|
847 | // const int axis,
|
---|
848 | // const float position,
|
---|
849 | // int &raysBack,
|
---|
850 | // int &raysFront,
|
---|
851 | // int &pvsBack,
|
---|
852 | // int &pvsFront
|
---|
853 | );
|
---|
854 |
|
---|
855 | void
|
---|
856 | EvalCostRatioHeuristic(
|
---|
857 | RssTreeLeaf *node,
|
---|
858 | SplitInfo &info
|
---|
859 | // const int axis,
|
---|
860 | // float &position,
|
---|
861 | // int &raysBack,
|
---|
862 | // int &raysFront,
|
---|
863 | // int &pvsBack,
|
---|
864 | // int &pvsFront
|
---|
865 | );
|
---|
866 |
|
---|
867 | int
|
---|
868 | SelectPlane(RssTreeLeaf *leaf,
|
---|
869 | const AxisAlignedBox3 &box,
|
---|
870 | SplitInfo &info
|
---|
871 | );
|
---|
872 |
|
---|
873 | void
|
---|
874 | GetCostRatio(
|
---|
875 | RssTreeLeaf *leaf,
|
---|
876 | SplitInfo &info
|
---|
877 | // const int axis,
|
---|
878 | // const float position,
|
---|
879 | // const int raysBack,
|
---|
880 | // const int raysFront,
|
---|
881 | // const int pvsBack,
|
---|
882 | // const int pvsFront
|
---|
883 | );
|
---|
884 |
|
---|
885 | AxisAlignedBox3 GetBBox(const RssTreeNode *node) const {
|
---|
886 | return node->bbox;
|
---|
887 |
|
---|
888 | // if (node->parent == NULL)
|
---|
889 | // return bbox;
|
---|
890 |
|
---|
891 | // if (!node->IsLeaf())
|
---|
892 | // return ((RssTreeInterior *)node)->bbox;
|
---|
893 |
|
---|
894 | // if (node->parent->axis >= 3)
|
---|
895 | // return node->parent->bbox;
|
---|
896 |
|
---|
897 | // AxisAlignedBox3 box(node->parent->bbox);
|
---|
898 | // if (node->parent->front == node)
|
---|
899 | // box.SetMin(node->parent->axis, node->parent->position);
|
---|
900 | // else
|
---|
901 | // box.SetMax(node->parent->axis, node->parent->position);
|
---|
902 | // return box;
|
---|
903 | }
|
---|
904 |
|
---|
905 | AxisAlignedBox3 GetShrankedBBox(const RssTreeNode *node) const;
|
---|
906 |
|
---|
907 | AxisAlignedBox3 GetDirBBox(const RssTreeNode *node) const {
|
---|
908 | return node->dirBBox;
|
---|
909 | // if (node->parent == NULL)
|
---|
910 | // return dirBBox;
|
---|
911 |
|
---|
912 | // if (!node->IsLeaf() )
|
---|
913 | // return ((RssTreeInterior *)node)->dirBBox;
|
---|
914 |
|
---|
915 | // if (node->parent->axis < 3)
|
---|
916 | // return node->parent->dirBBox;
|
---|
917 |
|
---|
918 | // AxisAlignedBox3 dBBox(node->parent->dirBBox);
|
---|
919 |
|
---|
920 | // if (node->parent->front == node)
|
---|
921 | // dBBox.SetMin(node->parent->axis - 3, node->parent->position);
|
---|
922 | // else
|
---|
923 | // dBBox.SetMax(node->parent->axis - 3, node->parent->position);
|
---|
924 | // return dBBox;
|
---|
925 | }
|
---|
926 |
|
---|
927 | int
|
---|
928 | ReleaseMemory(const int time);
|
---|
929 |
|
---|
930 | int
|
---|
931 | CollapseSubtree(RssTreeNode *node, const int time);
|
---|
932 |
|
---|
933 | void
|
---|
934 | CountAccess(RssTreeInterior *node, const long time) {
|
---|
935 | node->accesses++;
|
---|
936 | node->lastAccessTime = time;
|
---|
937 | }
|
---|
938 |
|
---|
939 | RssTreeNode *
|
---|
940 | SubdivideLeaf(
|
---|
941 | RssTreeLeaf *leaf
|
---|
942 | );
|
---|
943 |
|
---|
944 | void
|
---|
945 | RemoveRay(VssRay *ray,
|
---|
946 | vector<RssTreeLeaf *> *affectedLeaves,
|
---|
947 | const bool removeAllScheduledRays
|
---|
948 | );
|
---|
949 |
|
---|
950 | // void
|
---|
951 | // AddRay(VssRay *ray);
|
---|
952 | void
|
---|
953 | AddRay(RssTreeNode::RayInfo &info);
|
---|
954 |
|
---|
955 | void
|
---|
956 | TraverseInternalNode(
|
---|
957 | RayTraversalData &data,
|
---|
958 | std::stack<RayTraversalData> &tstack);
|
---|
959 |
|
---|
960 | void
|
---|
961 | EvaluateLeafStats(const TraversalData &data);
|
---|
962 |
|
---|
963 |
|
---|
964 | int
|
---|
965 | GetRootPvsSize() const {
|
---|
966 | return GetPvsSize(bbox);
|
---|
967 | }
|
---|
968 |
|
---|
969 | int
|
---|
970 | GetPvsSize(const AxisAlignedBox3 &box) const;
|
---|
971 |
|
---|
972 | int
|
---|
973 | CollectPvs(const AxisAlignedBox3 &box,
|
---|
974 | ObjectContainer &pvs
|
---|
975 | ) const;
|
---|
976 |
|
---|
977 | int
|
---|
978 | CollectRootPvs(
|
---|
979 | ObjectContainer &pvs
|
---|
980 | ) const
|
---|
981 | {
|
---|
982 | return CollectPvs(bbox, pvs);
|
---|
983 | }
|
---|
984 |
|
---|
985 |
|
---|
986 | void
|
---|
987 | UpdateTreeStatistics();
|
---|
988 |
|
---|
989 |
|
---|
990 | int
|
---|
991 | GenerateRays(const float ratioPerLeaf,
|
---|
992 | SimpleRayContainer &rays);
|
---|
993 |
|
---|
994 | int
|
---|
995 | GenerateRays(const int numberOfRays,
|
---|
996 | const int numberOfLeaves,
|
---|
997 | SimpleRayContainer &rays);
|
---|
998 |
|
---|
999 | float
|
---|
1000 | GetAvgPvsSize();
|
---|
1001 |
|
---|
1002 | int
|
---|
1003 | UpdateSubdivision();
|
---|
1004 |
|
---|
1005 | bool
|
---|
1006 | TerminationCriteriaSatisfied(RssTreeLeaf *leaf);
|
---|
1007 |
|
---|
1008 | void
|
---|
1009 | CollectLeaves(vector<RssTreeLeaf *> &leaves);
|
---|
1010 |
|
---|
1011 | bool
|
---|
1012 | ClipRay(
|
---|
1013 | RssTreeNode::RayInfo &rayInfo,
|
---|
1014 | const AxisAlignedBox3 &box
|
---|
1015 | );
|
---|
1016 |
|
---|
1017 | RssTreeNode *GetRoot(Intersectable *object = NULL) const;
|
---|
1018 |
|
---|
1019 | bool
|
---|
1020 | ValidLeaf(RssTreeLeaf *leaf) const;
|
---|
1021 |
|
---|
1022 | void
|
---|
1023 | GenerateLeafRays(RssTreeLeaf *leaf,
|
---|
1024 | const int numberOfRays,
|
---|
1025 | SimpleRayContainer &rays);
|
---|
1026 |
|
---|
1027 | void
|
---|
1028 | GenerateLeafRaysSimple(RssTreeLeaf *leaf,
|
---|
1029 | const int numberOfRays,
|
---|
1030 | SimpleRayContainer &rays);
|
---|
1031 |
|
---|
1032 |
|
---|
1033 | void
|
---|
1034 | PickEdgeRays(RssTreeLeaf *leaf,
|
---|
1035 | int &r1,
|
---|
1036 | int &r2
|
---|
1037 | );
|
---|
1038 |
|
---|
1039 | int
|
---|
1040 | CollectRays(VssRayContainer &rays,
|
---|
1041 | const int number);
|
---|
1042 |
|
---|
1043 | int
|
---|
1044 | CollectRays(VssRayContainer &rays
|
---|
1045 | );
|
---|
1046 |
|
---|
1047 | void
|
---|
1048 | UpdatePvsSize(RssTreeLeaf *leaf);
|
---|
1049 |
|
---|
1050 | void
|
---|
1051 | ComputeImportance(RssTreeLeaf *leaf);
|
---|
1052 |
|
---|
1053 | void
|
---|
1054 | SetPass(const int p) {
|
---|
1055 | mCurrentPass = p;
|
---|
1056 | }
|
---|
1057 |
|
---|
1058 | void GetRayContribution(const RssTreeNode::RayInfo &info,
|
---|
1059 | float &weight,
|
---|
1060 | float &contribution);
|
---|
1061 |
|
---|
1062 | float
|
---|
1063 | GetSampleWeight(const int pass);
|
---|
1064 |
|
---|
1065 | int
|
---|
1066 | RemoveInteriorRays(
|
---|
1067 | RssTreeLeaf *leaf
|
---|
1068 | );
|
---|
1069 |
|
---|
1070 | bool
|
---|
1071 | IsRayConvexCombination(const RssTreeNode::RayInfo &ray,
|
---|
1072 | const RssTreeNode::RayInfo &r1,
|
---|
1073 | const RssTreeNode::RayInfo &r2,
|
---|
1074 | const RssTreeNode::RayInfo &r3);
|
---|
1075 |
|
---|
1076 | int
|
---|
1077 | PruneRaysRandom(RssTreeLeaf *leaf,
|
---|
1078 | const float ratio);
|
---|
1079 |
|
---|
1080 | int
|
---|
1081 | PruneRaysContribution(RssTreeLeaf *leaf,
|
---|
1082 | const float ratio);
|
---|
1083 |
|
---|
1084 | int
|
---|
1085 | PruneRays(
|
---|
1086 | const int desired
|
---|
1087 | );
|
---|
1088 |
|
---|
1089 |
|
---|
1090 | void
|
---|
1091 | FindSilhouetteRays(RssTreeLeaf *leaf,
|
---|
1092 | vector<RssTreeLeaf::SilhouetteRays> &rays
|
---|
1093 | );
|
---|
1094 |
|
---|
1095 | void
|
---|
1096 | PushRoots(std::priority_queue<TraversalData> &stack) const;
|
---|
1097 |
|
---|
1098 | void
|
---|
1099 | PushRoots(std::stack<RssTreeNode *> &st) const;
|
---|
1100 |
|
---|
1101 | void
|
---|
1102 | PushRoots(std::stack<RayTraversalData> &st, RssTreeNode::RayInfo &info) const;
|
---|
1103 |
|
---|
1104 | void
|
---|
1105 | UpdateImportance(
|
---|
1106 | RssTreeNode *node);
|
---|
1107 |
|
---|
1108 | void
|
---|
1109 | GenerateRay(float *params, SimpleRayContainer &rays);
|
---|
1110 |
|
---|
1111 | void
|
---|
1112 | GenerateLeafRay(
|
---|
1113 | float *params,
|
---|
1114 | SimpleRayContainer &rays,
|
---|
1115 | const AxisAlignedBox3 &box,
|
---|
1116 | const AxisAlignedBox3 &dirBBox
|
---|
1117 | );
|
---|
1118 |
|
---|
1119 | };
|
---|
1120 |
|
---|
1121 |
|
---|
1122 | class RssBasedDistribution: public SamplingStrategy
|
---|
1123 | {
|
---|
1124 | public:
|
---|
1125 | HaltonSequence mHalton;
|
---|
1126 | RssTree *mRssTree;
|
---|
1127 | // id of sampling pass (a pass is defined by two consecutive updates)
|
---|
1128 | int mPass;
|
---|
1129 |
|
---|
1130 | RssBasedDistribution(Preprocessor &preprocessor):
|
---|
1131 | SamplingStrategy(preprocessor){
|
---|
1132 | mType = RSS_BASED_DISTRIBUTION;
|
---|
1133 | mRssTree = NULL;
|
---|
1134 | mPass = 0;
|
---|
1135 | }
|
---|
1136 |
|
---|
1137 | virtual void Update(VssRayContainer &vssRays);
|
---|
1138 | virtual bool RequiresRays() { return true; }
|
---|
1139 |
|
---|
1140 | private:
|
---|
1141 |
|
---|
1142 | virtual bool GenerateSample(SimpleRay &ray);
|
---|
1143 |
|
---|
1144 | };
|
---|
1145 |
|
---|
1146 |
|
---|
1147 | };
|
---|
1148 |
|
---|
1149 | #endif // __RSSTREE_H__
|
---|
1150 |
|
---|