1 | #include <stack>
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2 | #include <time.h>
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3 | #include <iomanip>
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4 |
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5 | #include "BvHierarchy.h"
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6 | #include "ViewCell.h"
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7 | #include "Plane3.h"
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8 | #include "Mesh.h"
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9 | #include "common.h"
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10 | #include "Environment.h"
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11 | #include "Polygon3.h"
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12 | #include "Ray.h"
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13 | #include "AxisAlignedBox3.h"
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14 | #include "Exporter.h"
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15 | #include "Plane3.h"
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16 | #include "ViewCellsManager.h"
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17 | #include "Beam.h"
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18 | #include "VspTree.h"
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19 |
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20 |
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21 | namespace GtpVisibilityPreprocessor {
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22 |
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23 |
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24 | #define USE_FIXEDPOINT_T 0
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25 |
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26 | int BvhNode::sMailId = 10000; //2147483647;
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27 | int BvhNode::sReservedMailboxes = 1;
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28 |
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29 | BvHierarchy *BvHierarchy::BvhSubdivisionCandidate::sBvHierarchy = NULL;
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30 |
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31 |
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32 | /// sorting operator
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33 | inline static bool ilt(Intersectable *obj1, Intersectable *obj2)
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34 | {
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35 | return obj1->mId < obj2->mId;
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36 | }
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37 |
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38 |
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39 | /***************************************************************/
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40 | /* class BvhNode implementation */
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41 | /***************************************************************/
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42 |
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43 | BvhNode::BvhNode(): mParent(NULL), mMailbox(0)
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44 | {
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45 | }
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46 |
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47 | BvhNode::BvhNode(const AxisAlignedBox3 &bbox):
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48 | mParent(NULL), mBoundingBox(bbox), mMailbox(0)
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49 | {
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50 | }
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51 |
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52 |
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53 | BvhNode::BvhNode(const AxisAlignedBox3 &bbox, BvhInterior *parent):
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54 | mBoundingBox(bbox), mParent(parent), mMailbox(0)
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55 | {
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56 | }
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57 |
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58 |
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59 | bool BvhNode::IsRoot() const
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60 | {
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61 | return mParent == NULL;
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62 | }
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63 |
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64 |
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65 | BvhInterior *BvhNode::GetParent()
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66 | {
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67 | return mParent;
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68 | }
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69 |
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70 |
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71 | void BvhNode::SetParent(BvhInterior *parent)
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72 | {
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73 | mParent = parent;
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74 | }
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75 |
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76 |
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77 |
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78 | /******************************************************************/
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79 | /* class BvhInterior implementation */
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80 | /******************************************************************/
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81 |
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82 |
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83 | BvhLeaf::BvhLeaf(const AxisAlignedBox3 &bbox):
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84 | BvhNode(bbox), mSubdivisionCandidate(NULL)
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85 | {
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86 | }
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87 |
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88 |
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89 | BvhLeaf::BvhLeaf(const AxisAlignedBox3 &bbox, BvhInterior *parent):
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90 | BvhNode(bbox, parent)
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91 | {
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92 | }
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93 |
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94 |
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95 | BvhLeaf::BvhLeaf(const AxisAlignedBox3 &bbox,
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96 | BvhInterior *parent,
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97 | const int numObjects):
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98 | BvhNode(bbox, parent)
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99 | {
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100 | mObjects.reserve(numObjects);
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101 | }
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102 |
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103 |
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104 | bool BvhLeaf::IsLeaf() const
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105 | {
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106 | return true;
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107 | }
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108 |
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109 |
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110 | BvhLeaf::~BvhLeaf()
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111 | {
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112 | }
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113 |
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114 |
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115 | /******************************************************************/
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116 | /* class BvhInterior implementation */
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117 | /******************************************************************/
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118 |
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119 |
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120 | BvhInterior::BvhInterior(const AxisAlignedBox3 &bbox):
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121 | BvhNode(bbox), mFront(NULL), mBack(NULL)
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122 | {
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123 | }
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124 |
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125 |
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126 | BvhInterior::BvhInterior(const AxisAlignedBox3 &bbox, BvhInterior *parent):
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127 | BvhNode(bbox, parent), mFront(NULL), mBack(NULL)
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128 | {
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129 | }
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130 |
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131 |
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132 | void BvhInterior::ReplaceChildLink(BvhNode *oldChild, BvhNode *newChild)
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133 | {
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134 | if (mBack == oldChild)
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135 | mBack = newChild;
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136 | else
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137 | mFront = newChild;
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138 | }
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139 |
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140 |
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141 | bool BvhInterior::IsLeaf() const
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142 | {
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143 | return false;
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144 | }
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145 |
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146 |
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147 | BvhInterior::~BvhInterior()
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148 | {
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149 | DEL_PTR(mFront);
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150 | DEL_PTR(mBack);
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151 | }
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152 |
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153 |
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154 | void BvhInterior::SetupChildLinks(BvhNode *front, BvhNode *back)
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155 | {
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156 | mBack = back;
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157 | mFront = front;
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158 | }
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159 |
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160 |
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161 |
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162 | /*******************************************************************/
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163 | /* class BvHierarchy implementation */
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164 | /*******************************************************************/
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165 |
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166 |
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167 | BvHierarchy::BvHierarchy():
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168 | mRoot(NULL),
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169 | mTimeStamp(1)
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170 | {
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171 | ReadEnvironment();
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172 | mSubdivisionCandidates = new SortableEntryContainer;
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173 | }
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174 |
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175 |
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176 | BvHierarchy::~BvHierarchy()
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177 | {
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178 | // delete kd intersectables
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179 | BvhIntersectableMap::iterator it, it_end = mBvhIntersectables.end();
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180 |
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181 | for (it = mBvhIntersectables.begin(); it != mBvhIntersectables.end(); ++ it)
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182 | {
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183 | DEL_PTR((*it).second);
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184 | }
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185 |
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186 | DEL_PTR(mSubdivisionCandidates);
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187 |
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188 | mSubdivisionStats.close();
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189 | }
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190 |
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191 |
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192 | void BvHierarchy::ReadEnvironment()
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193 | {
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194 | bool randomize = false;
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195 | Environment::GetSingleton()->GetBoolValue("VspTree.Construction.randomize", randomize);
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196 | if (randomize)
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197 | Randomize(); // initialise random generator for heuristics
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198 |
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199 | //-- termination criteria for autopartition
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200 | Environment::GetSingleton()->GetIntValue("BvHierarchy.Termination.maxDepth", mTermMaxDepth);
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201 | Environment::GetSingleton()->GetIntValue("BvHierarchy.Termination.maxLeaves", mTermMaxLeaves);
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202 | Environment::GetSingleton()->GetIntValue("BvHierarchy.Termination.minObjects", mTermMinObjects);
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203 | Environment::GetSingleton()->GetFloatValue("BvHierarchy.Termination.minProbability", mTermMinProbability);
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204 |
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205 | Environment::GetSingleton()->GetIntValue("BvHierarchy.Termination.missTolerance", mTermMissTolerance);
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206 |
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207 | //-- max cost ratio for early tree termination
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208 | Environment::GetSingleton()->GetFloatValue("BvHierarchy.Termination.maxCostRatio", mTermMaxCostRatio);
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209 |
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210 | Environment::GetSingleton()->GetFloatValue("BvHierarchy.Termination.minGlobalCostRatio",
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211 | mTermMinGlobalCostRatio);
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212 | Environment::GetSingleton()->GetIntValue("BvHierarchy.Termination.globalCostMissTolerance",
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213 | mTermGlobalCostMissTolerance);
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214 |
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215 | //-- factors for bsp tree split plane heuristics
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216 |
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217 | // if only the driving axis is used for axis aligned split
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218 | Environment::GetSingleton()->GetBoolValue("BvHierarchy.splitUseOnlyDrivingAxis", mOnlyDrivingAxis);
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219 | Environment::GetSingleton()->GetFloatValue("BvHierarchy.maxStaticMemory", mMaxMemory);
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220 | Environment::GetSingleton()->GetBoolValue("BvHierarchy.useCostHeuristics", mUseCostHeuristics);
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221 |
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222 | char subdivisionStatsLog[100];
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223 | Environment::GetSingleton()->GetStringValue("BvHierarchy.subdivisionStats", subdivisionStatsLog);
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224 | mSubdivisionStats.open(subdivisionStatsLog);
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225 |
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226 | Environment::GetSingleton()->GetFloatValue(
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227 | "BvHierarchy.Construction.renderCostDecreaseWeight", mRenderCostDecreaseWeight);
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228 |
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229 | Environment::GetSingleton()->GetBoolValue("BvHierarchy.useGlobalSort", mUseGlobalSorting);
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230 |
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231 |
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232 | ///////////////////
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233 | //-- debug output
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234 | Debug << "******* Bvh hierarchy options ******** " << endl;
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235 | Debug << "max depth: " << mTermMaxDepth << endl;
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236 | Debug << "min probabiliy: " << mTermMinProbability<< endl;
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237 | Debug << "min objects: " << mTermMinObjects << endl;
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238 | Debug << "max cost ratio: " << mTermMaxCostRatio << endl;
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239 | Debug << "miss tolerance: " << mTermMissTolerance << endl;
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240 | Debug << "max leaves: " << mTermMaxLeaves << endl;
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241 | Debug << "randomize: " << randomize << endl;
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242 | Debug << "min global cost ratio: " << mTermMinGlobalCostRatio << endl;
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243 | Debug << "global cost miss tolerance: " << mTermGlobalCostMissTolerance << endl;
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244 | Debug << "only driving axis: " << mOnlyDrivingAxis << endl;
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245 | Debug << "max memory: " << mMaxMemory << endl;
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246 | Debug << "use cost heuristics: " << mUseCostHeuristics << endl;
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247 | Debug << "subdivision stats log: " << subdivisionStatsLog << endl;
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248 | Debug << "split borders: " << mSplitBorder << endl;
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249 | Debug << "render cost decrease weight: " << mRenderCostDecreaseWeight << endl;
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250 | Debug << "use global sort: " << mUseGlobalSorting << endl;
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251 | Debug << endl;
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252 | }
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253 |
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254 |
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255 | static void AssociateObjectsWithLeaf(BvhLeaf *leaf)
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256 | {
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257 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
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258 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
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259 | {
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260 | (*oit)->mBvhLeaf = leaf;
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261 | }
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262 | }
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263 |
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264 |
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265 | BvhInterior *BvHierarchy::SubdivideNode(const BvhSubdivisionCandidate &sc,
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266 | BvhTraversalData &frontData,
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267 | BvhTraversalData &backData)
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268 | {
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269 | const BvhTraversalData &tData = sc.mParentData;
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270 | BvhLeaf *leaf = tData.mNode;
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271 | mBvhStats.nodes += 2; // we have two new leaves
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272 |
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273 | // add the new nodes to the tree
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274 | BvhInterior *node = new BvhInterior(tData.mBoundingBox, leaf->GetParent());
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275 |
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276 |
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277 | ///////////////////////////////////////////////////////////////////
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278 | //-- fill front and back traversal data with the new values
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279 |
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280 | frontData.mDepth = backData.mDepth = tData.mDepth + 1;
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281 |
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282 | frontData.mBoundingBox = ComputeBoundingBox(sc.mFrontObjects, &tData.mBoundingBox);
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283 | backData.mBoundingBox = ComputeBoundingBox(sc.mBackObjects, &tData.mBoundingBox);
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284 |
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285 |
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286 | ////////////////////////////////
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287 | //-- create front and back leaf
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288 |
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289 | BvhLeaf *back =
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290 | new BvhLeaf(backData.mBoundingBox, node, (int)sc.mBackObjects.size());
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291 | BvhLeaf *front =
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292 | new BvhLeaf(frontData.mBoundingBox, node, (int)sc.mFrontObjects.size());
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293 |
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294 | BvhInterior *parent = leaf->GetParent();
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295 |
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296 | // replace a link from node's parent
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297 | if (parent)
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298 | {
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299 | parent->ReplaceChildLink(leaf, node);
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300 | node->SetParent(parent);
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301 | }
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302 | else // no parent => this node is the root
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303 | {
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304 | mRoot = node;
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305 | }
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306 |
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307 | // and setup child links
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308 | node->SetupChildLinks(front, back);
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309 |
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310 | ++ mBvhStats.splits;
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311 |
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312 | ////////////////////////////////////
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313 | //-- fill traversal data
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314 |
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315 | frontData.mNode = front;
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316 | backData.mNode = back;
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317 |
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318 | back->mObjects = sc.mBackObjects;
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319 | front->mObjects = sc.mFrontObjects;
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320 |
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321 | AssociateObjectsWithLeaf(back);
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322 | AssociateObjectsWithLeaf(front);
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323 |
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324 | // compute probability of this node being visible,
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325 | // i.e., volume of the view cells that can see this node
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326 | frontData.mProbability = EvalViewCellsVolume(sc.mFrontObjects);
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327 | backData.mProbability = EvalViewCellsVolume(sc.mBackObjects);
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328 |
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329 | // how often was max cost ratio missed in this branch?
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330 | frontData.mMaxCostMisses = sc.mMaxCostMisses;
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331 | backData.mMaxCostMisses = sc.mMaxCostMisses;
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332 |
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333 | // assign the objects in sorted order
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334 | if (mUseGlobalSorting)
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335 | {
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336 | AssignSortedObjects(sc, frontData, backData);
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337 | }
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338 |
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339 | // return the new interior node
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340 | return node;
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341 | }
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342 |
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343 |
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344 | BvhNode *BvHierarchy::Subdivide(SplitQueue &tQueue,
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345 | SubdivisionCandidate *splitCandidate,
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346 | const bool globalCriteriaMet)
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347 | {
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348 | BvhSubdivisionCandidate *sc =
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349 | dynamic_cast<BvhSubdivisionCandidate *>(splitCandidate);
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350 | BvhTraversalData &tData = sc->mParentData;
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351 |
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352 | BvhNode *currentNode = tData.mNode;
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353 |
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354 | if (!LocalTerminationCriteriaMet(tData) && !globalCriteriaMet)
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355 | {
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356 | //////////////////////////////////////////
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357 | //-- continue subdivision
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358 |
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359 | BvhTraversalData tFrontData;
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360 | BvhTraversalData tBackData;
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361 |
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362 | // create new interior node and two leaf node
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363 | currentNode = SubdivideNode(
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364 | *sc,
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365 | tFrontData,
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366 | tBackData);
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367 |
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368 | // decrease the weighted average cost of the subdivisoin
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369 | mTotalCost -= sc->GetRenderCostDecrease();
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370 |
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371 | // subdivision statistics
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372 | if (1) PrintSubdivisionStats(*sc);
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373 |
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374 |
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375 | /////////////////////////////////////////
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376 | //-- push the new split candidates on the queue
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377 |
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378 | BvhSubdivisionCandidate *frontCandidate =
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379 | new BvhSubdivisionCandidate(tFrontData);
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380 | BvhSubdivisionCandidate *backCandidate =
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381 | new BvhSubdivisionCandidate(tBackData);
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382 |
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383 | EvalSubdivisionCandidate(*frontCandidate);
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384 | EvalSubdivisionCandidate(*backCandidate);
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385 |
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386 | // cross reference
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387 | tFrontData.mNode->SetSubdivisionCandidate(frontCandidate);
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388 | tBackData.mNode->SetSubdivisionCandidate(backCandidate);
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389 |
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390 | Debug << "leaf: " << tFrontData.mNode << " setting f candidate: "
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391 | << tFrontData.mNode->GetSubdivisionCandidate() << " type: "
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392 | << tFrontData.mNode->GetSubdivisionCandidate()->Type() << endl;
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393 |
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394 | Debug << "leaf: " << tBackData.mNode << " setting b candidate: "
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395 | << tBackData.mNode->GetSubdivisionCandidate() << " type: "
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396 | << tBackData.mNode->GetSubdivisionCandidate()->Type() << endl;
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397 |
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398 | tQueue.Push(frontCandidate);
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399 | tQueue.Push(backCandidate);
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400 | }
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401 |
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402 | /////////////////////////////////
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403 | //-- node is a leaf => terminate traversal
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404 |
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405 | if (currentNode->IsLeaf())
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406 | {
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407 | //////////////////////////////////////
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408 | //-- store additional info
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409 | EvaluateLeafStats(tData);
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410 |
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411 | const bool mStoreRays = true;
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412 | if (mStoreRays)
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413 | {
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414 | BvhLeaf *leaf = dynamic_cast<BvhLeaf *>(currentNode);
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415 | CollectRays(leaf->mObjects, leaf->mVssRays);
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416 | }
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417 |
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418 | //////////////////////////////////////
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419 |
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420 | // this leaf is no candidate for splitting anymore
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421 | // => detach subdivision candidate
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422 | tData.mNode->SetSubdivisionCandidate(NULL);
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423 | // detach node so we don't delete it with the traversal data
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424 | tData.mNode = NULL;
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425 | }
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426 |
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427 | return currentNode;
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428 | }
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429 |
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430 |
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431 | void BvHierarchy::EvalSubdivisionCandidate(BvhSubdivisionCandidate &splitCandidate)
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432 | {
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433 | // compute best object partition
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434 | const float ratio = SelectObjectPartition(
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435 | splitCandidate.mParentData,
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436 | splitCandidate.mFrontObjects,
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437 | splitCandidate.mBackObjects);
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438 |
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439 | BvhLeaf *leaf = splitCandidate.mParentData.mNode;
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440 |
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441 | // cost ratio violated?
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442 | const bool maxCostRatioViolated = mTermMaxCostRatio < ratio;
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443 |
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444 | splitCandidate.mMaxCostMisses = maxCostRatioViolated ?
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445 | splitCandidate.mParentData.mMaxCostMisses + 1 :
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446 | splitCandidate.mParentData.mMaxCostMisses;
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447 |
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448 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
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449 | const float oldProp = EvalViewCellsVolume(leaf->mObjects);
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450 |
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451 | const float oldRenderCost = oldProp * (float)leaf->mObjects.size() / viewSpaceVol;
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452 |
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453 | // compute global decrease in render cost
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454 | float newRenderCost = EvalRenderCost(splitCandidate.mParentData,
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455 | splitCandidate.mFrontObjects,
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456 | splitCandidate.mBackObjects);
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457 |
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458 | newRenderCost /= viewSpaceVol;
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459 | const float renderCostDecr = oldRenderCost - newRenderCost;
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460 |
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461 | Debug << "\nbvh render cost decr: " << renderCostDecr << endl;
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462 | splitCandidate.SetRenderCostDecrease(renderCostDecr);
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463 |
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464 | #if 0
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465 | const float priority = (float)-splitCandidate.mParentData.mDepth;
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466 | #else
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467 | // take render cost of node into account
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468 | // otherwise danger of being stuck in a local minimum!!
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469 | const float factor = mRenderCostDecreaseWeight;
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470 | const float priority = factor * renderCostDecr + (1.0f - factor) * oldRenderCost;
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471 | #endif
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472 |
|
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473 | // compute global decrease in render cost
|
---|
474 | splitCandidate.SetPriority(priority);
|
---|
475 | }
|
---|
476 |
|
---|
477 |
|
---|
478 | inline bool BvHierarchy::LocalTerminationCriteriaMet(const BvhTraversalData &data) const
|
---|
479 | {
|
---|
480 | // matt: TODO
|
---|
481 | return ( 0
|
---|
482 | //|| ((int)data.mNode->mObjects.size() < mTermMinObjects)
|
---|
483 | //|| (data.mProbability <= mTermMinProbability)
|
---|
484 | //|| (data.mDepth >= mTermMaxDepth)
|
---|
485 | );
|
---|
486 | }
|
---|
487 |
|
---|
488 |
|
---|
489 | inline bool BvHierarchy::GlobalTerminationCriteriaMet(const BvhTraversalData &data) const
|
---|
490 | {
|
---|
491 | // matt: TODO
|
---|
492 | return (0
|
---|
493 | || (mBvhStats.Leaves() >= mTermMaxLeaves)
|
---|
494 | //|| (mGlobalCostMisses >= mTermGlobalCostMissTolerance)
|
---|
495 | //|| mOutOfMemory
|
---|
496 | );
|
---|
497 | }
|
---|
498 |
|
---|
499 |
|
---|
500 | void BvHierarchy::EvaluateLeafStats(const BvhTraversalData &data)
|
---|
501 | {
|
---|
502 | // the node became a leaf -> evaluate stats for leafs
|
---|
503 | BvhLeaf *leaf = data.mNode;
|
---|
504 |
|
---|
505 | ++ mCreatedLeaves;
|
---|
506 |
|
---|
507 | if (data.mDepth >= mTermMaxDepth)
|
---|
508 | {
|
---|
509 | ++ mBvhStats.maxDepthNodes;
|
---|
510 | //Debug << "new max depth: " << mVspStats.maxDepthNodes << endl;
|
---|
511 | }
|
---|
512 |
|
---|
513 | if (data.mDepth < mTermMaxDepth)
|
---|
514 | {
|
---|
515 | ++ mBvhStats.minDepthNodes;
|
---|
516 | }
|
---|
517 |
|
---|
518 | if (data.mProbability <= mTermMinProbability)
|
---|
519 | ++ mBvhStats.minProbabilityNodes;
|
---|
520 |
|
---|
521 | // accumulate depth to compute average depth
|
---|
522 | mBvhStats.accumDepth += data.mDepth;
|
---|
523 |
|
---|
524 | if ((int)(leaf->mObjects.size()) < mTermMinObjects)
|
---|
525 | ++ mBvhStats.minObjectsNodes;
|
---|
526 |
|
---|
527 | if ((int)(leaf->mObjects.size()) > mBvhStats.maxObjectRefs)
|
---|
528 | mBvhStats.maxObjectRefs = (int)leaf->mObjects.size();
|
---|
529 | }
|
---|
530 |
|
---|
531 |
|
---|
532 | #if 0
|
---|
533 | float BvHierarchy::EvalLocalObjectPartition(const BvhTraversalData &tData,
|
---|
534 | const int axis,
|
---|
535 | ObjectContainer &objectsFront,
|
---|
536 | ObjectContainer &objectsBack)
|
---|
537 | {
|
---|
538 | const float maxBox = tData.mBoundingBox.Max(axis);
|
---|
539 | const float minBox = tData.mBoundingBox.Min(axis);
|
---|
540 |
|
---|
541 | float midPoint = (maxBox + minBox) * 0.5f;
|
---|
542 |
|
---|
543 | ObjectContainer::const_iterator oit, oit_end = tData.mNode->mObjects.end();
|
---|
544 |
|
---|
545 | for (oit = tData.mNode->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
546 | {
|
---|
547 | Intersectable *obj = *oit;
|
---|
548 | const AxisAlignedBox3 box = obj->GetBox();
|
---|
549 |
|
---|
550 | const float objMid = (box.Max(axis) + box.Min(axis)) * 0.5f;
|
---|
551 |
|
---|
552 | // object mailed => belongs to back objects
|
---|
553 | if (objMid < midPoint)
|
---|
554 | objectsBack.push_back(obj);
|
---|
555 | else
|
---|
556 | objectsFront.push_back(obj);
|
---|
557 | }
|
---|
558 |
|
---|
559 | const float oldRenderCost = tData.mProbability * (float)tData.mNode->mObjects.size();
|
---|
560 | const float newRenderCost =
|
---|
561 | EvalRenderCost(tData, objectsFront, objectsBack);
|
---|
562 |
|
---|
563 | const float ratio = newRenderCost / oldRenderCost;
|
---|
564 | return ratio;
|
---|
565 | }
|
---|
566 |
|
---|
567 | #else
|
---|
568 |
|
---|
569 | float BvHierarchy::EvalLocalObjectPartition(const BvhTraversalData &tData,
|
---|
570 | const int axis,
|
---|
571 | ObjectContainer &objectsFront,
|
---|
572 | ObjectContainer &objectsBack)
|
---|
573 | {
|
---|
574 | PrepareLocalSubdivisionCandidates(tData, axis);
|
---|
575 |
|
---|
576 | SortableEntryContainer::const_iterator cit, cit_end = mSubdivisionCandidates->end();
|
---|
577 |
|
---|
578 | int i = 0;
|
---|
579 | const int border = (int)tData.mNode->mObjects.size() / 2;
|
---|
580 |
|
---|
581 | for (cit = mSubdivisionCandidates->begin(); cit != cit_end; ++ cit, ++ i)
|
---|
582 | {
|
---|
583 | Intersectable *obj = (*cit).mObject;
|
---|
584 |
|
---|
585 | // object mailed => belongs to back objects
|
---|
586 | if (i < border)
|
---|
587 | objectsBack.push_back(obj);
|
---|
588 | else
|
---|
589 | objectsFront.push_back(obj);
|
---|
590 | }
|
---|
591 |
|
---|
592 | const float oldProp = EvalViewCellsVolume(tData.mNode->mObjects);
|
---|
593 | //const float oldProp2 = tData.mProbability;
|
---|
594 |
|
---|
595 | const float oldRenderCost = oldProp * (float)tData.mNode->mObjects.size();
|
---|
596 | const float newRenderCost = EvalRenderCost(tData, objectsFront, objectsBack);
|
---|
597 |
|
---|
598 | const float ratio = newRenderCost / oldRenderCost;
|
---|
599 | return ratio;
|
---|
600 | }
|
---|
601 | #endif
|
---|
602 |
|
---|
603 |
|
---|
604 | float BvHierarchy::EvalSah(const BvhTraversalData &tData,
|
---|
605 | const int axis,
|
---|
606 | ObjectContainer &objectsFront,
|
---|
607 | ObjectContainer &objectsBack)
|
---|
608 | {
|
---|
609 | PrepareLocalSubdivisionCandidates(tData, axis);
|
---|
610 |
|
---|
611 | // go through the lists, count the number of objects left and right
|
---|
612 | // and evaluate the following cost funcion:
|
---|
613 | // C = ct_div_ci + (ol + or)/queries
|
---|
614 | int objectsLeft = 0, objectsRight = (int)tData.mNode->mObjects.size();
|
---|
615 |
|
---|
616 | AxisAlignedBox3 box = tData.mNode->GetBoundingBox();
|
---|
617 |
|
---|
618 | float minBox = box.Min(axis);
|
---|
619 | float maxBox = box.Max(axis);
|
---|
620 | float boxArea = box.SurfaceArea();
|
---|
621 |
|
---|
622 | float minSum = 1e20f;
|
---|
623 |
|
---|
624 | vector<float> bordersRight;
|
---|
625 | bordersRight.resize(mSubdivisionCandidates->size());
|
---|
626 |
|
---|
627 | float minBorder = maxBox;
|
---|
628 | float maxBorder = minBox;
|
---|
629 |
|
---|
630 | SortableEntryContainer::const_iterator currentPos =
|
---|
631 | mSubdivisionCandidates->begin();
|
---|
632 |
|
---|
633 | SortableEntryContainer::reverse_iterator rcit =
|
---|
634 | mSubdivisionCandidates->rbegin(), rcit_end = mSubdivisionCandidates->rend();
|
---|
635 |
|
---|
636 | vector<float>::reverse_iterator rbit = bordersRight.rbegin();
|
---|
637 |
|
---|
638 | for (; rcit != rcit_end; ++ rcit, ++ rbit)
|
---|
639 | {
|
---|
640 | Intersectable *obj = (*rcit).mObject;
|
---|
641 | const AxisAlignedBox3 box = obj->GetBox();
|
---|
642 |
|
---|
643 | if (box.Min() < minBorder)
|
---|
644 | minBorder = box.Min(axis);
|
---|
645 |
|
---|
646 | (*rbit) = minBorder;
|
---|
647 | }
|
---|
648 |
|
---|
649 | vector<float>::const_iterator bit = bordersRight.begin();
|
---|
650 |
|
---|
651 | SortableEntryContainer::const_iterator cit, cit_end = mSubdivisionCandidates->end();
|
---|
652 | for (cit = mSubdivisionCandidates->begin(); cit != cit_end; ++ cit, ++ bit)
|
---|
653 | {
|
---|
654 | Intersectable *obj = (*cit).mObject;
|
---|
655 |
|
---|
656 | ++ objectsLeft;
|
---|
657 | -- objectsRight;
|
---|
658 |
|
---|
659 | AxisAlignedBox3 lbox = box;
|
---|
660 | AxisAlignedBox3 rbox = box;
|
---|
661 |
|
---|
662 | const AxisAlignedBox3 obox = obj->GetBox();
|
---|
663 |
|
---|
664 | if (obox.Max(axis) > maxBorder)
|
---|
665 | maxBorder = obox.Max(axis);
|
---|
666 |
|
---|
667 | lbox.SetMax(axis, maxBorder);
|
---|
668 | rbox.SetMin(axis, *bit);
|
---|
669 |
|
---|
670 | const float sum = objectsLeft * lbox.SurfaceArea() + objectsRight * rbox.SurfaceArea();
|
---|
671 |
|
---|
672 | // cout<<"pos="<<(*ci).value<<"\t q=("<<ql<<","<<qr<<")\t r=("<<rl<<","<<rr<<")"<<endl;
|
---|
673 | // cout<<"cost= "<<sum<<endl;
|
---|
674 |
|
---|
675 | if (sum < minSum)
|
---|
676 | {
|
---|
677 | minSum = sum;
|
---|
678 | // objects belongs to left side now
|
---|
679 | for (; currentPos != (cit + 1); ++ currentPos);
|
---|
680 | }
|
---|
681 | }
|
---|
682 |
|
---|
683 | //-- assign object to front and back volume
|
---|
684 |
|
---|
685 | // belongs to back bv
|
---|
686 | for (cit = mSubdivisionCandidates->begin(); cit != currentPos; ++ cit)
|
---|
687 | objectsBack.push_back((*cit).mObject);
|
---|
688 |
|
---|
689 | // belongs to front bv
|
---|
690 | for (cit = currentPos; cit != cit_end; ++ cit)
|
---|
691 | objectsFront.push_back((*cit).mObject);
|
---|
692 |
|
---|
693 | float oldCost = (float)tData.mNode->mObjects.size();
|
---|
694 | float newCost = minSum / boxArea;
|
---|
695 | float ratio = newCost / oldCost;
|
---|
696 |
|
---|
697 | #if 0
|
---|
698 | cout<<"===================="<<endl;
|
---|
699 | cout<<"costRatio="<<ratio<<" pos="<<position<<" t="<<(position - minBox)/(maxBox - minBox)
|
---|
700 | <<"\t o=("<<objectsBack<<","<<objectsFront<<")"<<endl;
|
---|
701 | #endif
|
---|
702 | return ratio;
|
---|
703 | }
|
---|
704 |
|
---|
705 |
|
---|
706 | static bool PrepareOutput(const int axis,
|
---|
707 | const int leaves,
|
---|
708 | ofstream &sumStats,
|
---|
709 | ofstream &vollStats,
|
---|
710 | ofstream &volrStats)
|
---|
711 | {
|
---|
712 | if ((axis == 0) && (leaves > 0) && (leaves < 90))
|
---|
713 | {
|
---|
714 | char str[64];
|
---|
715 | sprintf(str, "tmp/bvh_heur_sum-%04d.log", leaves);
|
---|
716 | sumStats.open(str);
|
---|
717 | sprintf(str, "tmp/bvh_heur_voll-%04d.log", leaves);
|
---|
718 | vollStats.open(str);
|
---|
719 | sprintf(str, "tmp/bvh_heur_volr-%04d.log", leaves);
|
---|
720 | volrStats.open(str);
|
---|
721 | }
|
---|
722 |
|
---|
723 | return sumStats.is_open() && vollStats.is_open() && volrStats.is_open();
|
---|
724 | }
|
---|
725 |
|
---|
726 |
|
---|
727 | static void PrintHeuristics(const int objectsRight,
|
---|
728 | const float sum,
|
---|
729 | const float volLeft,
|
---|
730 | const float volRight,
|
---|
731 | const float viewSpaceVol,
|
---|
732 | ofstream &sumStats,
|
---|
733 | ofstream &vollStats,
|
---|
734 | ofstream &volrStats)
|
---|
735 | {
|
---|
736 | sumStats
|
---|
737 | << "#Position\n" << objectsRight << endl
|
---|
738 | << "#Sum\n" << sum / viewSpaceVol << endl
|
---|
739 | << "#Vol\n" << (volLeft + volRight) / viewSpaceVol << endl;
|
---|
740 |
|
---|
741 | vollStats
|
---|
742 | << "#Position\n" << objectsRight << endl
|
---|
743 | << "#Vol\n" << volLeft / viewSpaceVol << endl;
|
---|
744 |
|
---|
745 | volrStats
|
---|
746 | << "#Position\n" << objectsRight << endl
|
---|
747 | << "#Vol\n" << volRight / viewSpaceVol << endl;
|
---|
748 | }
|
---|
749 |
|
---|
750 |
|
---|
751 | float BvHierarchy::EvalLocalCostHeuristics(const BvhTraversalData &tData,
|
---|
752 | const int axis,
|
---|
753 | ObjectContainer &objectsFront,
|
---|
754 | ObjectContainer &objectsBack)
|
---|
755 | {
|
---|
756 | ////////////////////////////////////////////////////////////////
|
---|
757 | // go through the lists, count the number of objects left and right
|
---|
758 | // and evaluate the cost funcion
|
---|
759 |
|
---|
760 | // prepare the heuristics by setting mailboxes and counters.
|
---|
761 | const float totalVol = PrepareHeuristics(tData, axis);
|
---|
762 |
|
---|
763 | // local helper variables
|
---|
764 | float volLeft = 0;
|
---|
765 | float volRight = totalVol;
|
---|
766 | int nObjectsLeft = 0;
|
---|
767 | const int nTotalObjects = (int)tData.mNode->mObjects.size();
|
---|
768 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
769 |
|
---|
770 | SortableEntryContainer::const_iterator backObjectsStart = mSubdivisionCandidates->begin();
|
---|
771 |
|
---|
772 | /////////////////////////////////
|
---|
773 | //-- the parameters for the current optimum
|
---|
774 |
|
---|
775 | float volBack = volLeft;
|
---|
776 | float volFront = volRight;
|
---|
777 | float newRenderCost = nTotalObjects * totalVol;
|
---|
778 |
|
---|
779 | #ifdef _DEBUG
|
---|
780 | ofstream sumStats;
|
---|
781 | ofstream vollStats;
|
---|
782 | ofstream volrStats;
|
---|
783 |
|
---|
784 | const bool printStats =
|
---|
785 | PrepareOutput(axis, mBvhStats.Leaves(), sumStats, vollStats, volrStats);
|
---|
786 | #endif
|
---|
787 |
|
---|
788 | ///////////////////////////////////////////////////
|
---|
789 | //-- the sweep heuristics
|
---|
790 | //-- traverse through events and find best split plane
|
---|
791 |
|
---|
792 | SortableEntryContainer::const_iterator cit, cit_end = cit_end = mSubdivisionCandidates->end();
|
---|
793 |
|
---|
794 | for (cit = mSubdivisionCandidates->begin(); cit != cit_end; ++ cit)
|
---|
795 | {
|
---|
796 | Intersectable *object = (*cit).mObject;
|
---|
797 |
|
---|
798 | // evaluate change in l and r volume
|
---|
799 | // voll = view cells that see only left node (i.e., left pvs)
|
---|
800 | // volr = view cells that see only right node (i.e., right pvs)
|
---|
801 | EvalHeuristicsContribution(object, volLeft, volRight);
|
---|
802 |
|
---|
803 | ++ nObjectsLeft;
|
---|
804 | const int nObjectsRight = nTotalObjects - nObjectsLeft;
|
---|
805 |
|
---|
806 | // the heuristics
|
---|
807 | const float sum = volLeft * (float)nObjectsLeft +
|
---|
808 | volRight * (float)nObjectsRight;
|
---|
809 |
|
---|
810 | #ifdef _DEBUG
|
---|
811 | if (printStats)
|
---|
812 | {
|
---|
813 | PrintHeuristics(nObjectsRight, sum, volLeft, volRight, viewSpaceVol,
|
---|
814 | sumStats, vollStats, volrStats);
|
---|
815 | }
|
---|
816 | #endif
|
---|
817 |
|
---|
818 | if (sum < newRenderCost)
|
---|
819 | {
|
---|
820 | newRenderCost = sum;
|
---|
821 |
|
---|
822 | volBack = volLeft;
|
---|
823 | volFront = volRight;
|
---|
824 |
|
---|
825 | // objects belongs to left side now
|
---|
826 | for (; backObjectsStart != (cit + 1); ++ backObjectsStart);
|
---|
827 | }
|
---|
828 | }
|
---|
829 |
|
---|
830 | ////////////////////////////////////////////
|
---|
831 | //-- assign object to front and back volume
|
---|
832 |
|
---|
833 | // belongs to back bv
|
---|
834 | for (cit = mSubdivisionCandidates->begin(); cit != backObjectsStart; ++ cit)
|
---|
835 | {
|
---|
836 | objectsBack.push_back((*cit).mObject);
|
---|
837 | }
|
---|
838 | // belongs to front bv
|
---|
839 | for (cit = backObjectsStart; cit != cit_end; ++ cit)
|
---|
840 | {
|
---|
841 | objectsFront.push_back((*cit).mObject);
|
---|
842 | }
|
---|
843 |
|
---|
844 | // render cost of the old parent
|
---|
845 | const float oldRenderCost = (float)nTotalObjects * totalVol + Limits::Small;
|
---|
846 | // the relative cost ratio
|
---|
847 | const float ratio = newRenderCost / oldRenderCost;
|
---|
848 |
|
---|
849 | #ifdef _DEBUG
|
---|
850 | Debug << "\n§§§§ eval local cost §§§§" << endl
|
---|
851 | << "back pvs: " << (int)objectsBack.size() << " front pvs: " << (int)objectsFront.size() << " total pvs: " << nTotalObjects << endl
|
---|
852 | << "back p: " << volBack / viewSpaceVol << " front p " << volFront / viewSpaceVol << " p: " << totalVol / viewSpaceVol << endl
|
---|
853 | << "old rc: " << oldRenderCost / viewSpaceVol << " new rc: " << newRenderCost / viewSpaceVol << endl
|
---|
854 | << "render cost decrease: " << oldRenderCost / viewSpaceVol - newRenderCost / viewSpaceVol << endl;
|
---|
855 | #endif
|
---|
856 |
|
---|
857 | return ratio;
|
---|
858 | }
|
---|
859 |
|
---|
860 |
|
---|
861 | void BvHierarchy::PrepareLocalSubdivisionCandidates(const BvhTraversalData &tData,
|
---|
862 | const int axis)
|
---|
863 | {
|
---|
864 | //-- insert object queries
|
---|
865 | ObjectContainer *objects;
|
---|
866 |
|
---|
867 | if (!mUseGlobalSorting)
|
---|
868 | objects = &tData.mNode->mObjects;
|
---|
869 | else
|
---|
870 | objects = tData.mSortedObjects[axis];
|
---|
871 |
|
---|
872 | CreateLocalSubdivisionCandidates(*objects, &mSubdivisionCandidates, mUseGlobalSorting, axis);
|
---|
873 | }
|
---|
874 |
|
---|
875 |
|
---|
876 | void BvHierarchy::CreateLocalSubdivisionCandidates(const ObjectContainer &objects,
|
---|
877 | SortableEntryContainer **subdivisionCandidates,
|
---|
878 | const bool sort,
|
---|
879 | const int axis)
|
---|
880 | {
|
---|
881 | (*subdivisionCandidates)->clear();
|
---|
882 |
|
---|
883 | // compute requested size and look if subdivision candidate has to be recomputed
|
---|
884 | const int requestedSize = (int)objects.size() * 2;
|
---|
885 |
|
---|
886 | // creates a sorted split candidates array
|
---|
887 | if ((*subdivisionCandidates)->capacity() > 500000 &&
|
---|
888 | requestedSize < (int)((*subdivisionCandidates)->capacity() / 10) )
|
---|
889 | {
|
---|
890 | delete (*subdivisionCandidates);
|
---|
891 | (*subdivisionCandidates) = new SortableEntryContainer;
|
---|
892 | }
|
---|
893 |
|
---|
894 | (*subdivisionCandidates)->reserve(requestedSize);
|
---|
895 |
|
---|
896 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
897 |
|
---|
898 | for (oit = objects.begin(); oit < oit_end; ++ oit)
|
---|
899 | {
|
---|
900 | Intersectable *object = *oit;
|
---|
901 | const AxisAlignedBox3 &box = object->GetBox();
|
---|
902 | const float midPt = (box.Min(axis) + box.Max(axis)) * 0.5f;
|
---|
903 |
|
---|
904 | (*subdivisionCandidates)->push_back(SortableEntry(object, midPt));
|
---|
905 | }
|
---|
906 |
|
---|
907 | if (sort)
|
---|
908 | {
|
---|
909 | stable_sort((*subdivisionCandidates)->begin(), (*subdivisionCandidates)->end());
|
---|
910 | }
|
---|
911 | }
|
---|
912 |
|
---|
913 |
|
---|
914 | const BvhStatistics &BvHierarchy::GetStatistics() const
|
---|
915 | {
|
---|
916 | return mBvhStats;
|
---|
917 | }
|
---|
918 |
|
---|
919 |
|
---|
920 | float BvHierarchy::PrepareHeuristics(const BvhTraversalData &tData, const int axis)
|
---|
921 | {
|
---|
922 | BvhLeaf *leaf = tData.mNode;
|
---|
923 | float vol = 0;
|
---|
924 |
|
---|
925 | // sort so we can use a sweep from right to left
|
---|
926 | PrepareLocalSubdivisionCandidates(tData, axis);
|
---|
927 |
|
---|
928 | // collect and mark the view cells as belonging to front pvs
|
---|
929 | ViewCellContainer viewCells;
|
---|
930 | CollectViewCells(tData.mNode->mObjects, viewCells, true);
|
---|
931 |
|
---|
932 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
933 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
934 | {
|
---|
935 | vol += (*vit)->GetVolume();
|
---|
936 | }
|
---|
937 |
|
---|
938 | // mail the objects on the left side
|
---|
939 | Intersectable::NewMail();
|
---|
940 | // mail view cells on the left side
|
---|
941 | ViewCell::NewMail();
|
---|
942 |
|
---|
943 | return vol;
|
---|
944 | }
|
---|
945 | ///////////////////////////////////////////////////////////
|
---|
946 |
|
---|
947 |
|
---|
948 | void BvHierarchy::EvalHeuristicsContribution(Intersectable *obj,
|
---|
949 | float &volLeft,
|
---|
950 | float &volRight)
|
---|
951 | {
|
---|
952 | // collect all view cells associated with this objects
|
---|
953 | // (also multiple times, if they are pierced by several rays)
|
---|
954 | ViewCellContainer viewCells;
|
---|
955 | const bool useMailboxing = false;
|
---|
956 |
|
---|
957 | CollectViewCells(obj, viewCells, useMailboxing);
|
---|
958 |
|
---|
959 | // classify view cells and compute volume contri accordingly
|
---|
960 | // possible view cell classifications:
|
---|
961 | // view cell mailed => view cell can be seen from left child node
|
---|
962 | // view cell counter > 0 view cell can be seen from right child node
|
---|
963 | // combined: view cell volume belongs to both nodes
|
---|
964 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
965 |
|
---|
966 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
967 | {
|
---|
968 | // view cells can also be seen from left child node
|
---|
969 | ViewCell *viewCell = *vit;
|
---|
970 |
|
---|
971 | const float vol = viewCell->GetVolume();
|
---|
972 |
|
---|
973 | if (!viewCell->Mailed())
|
---|
974 | {
|
---|
975 | viewCell->Mail();
|
---|
976 | // we now see view cell from both nodes
|
---|
977 | // => add volume to left node
|
---|
978 | volLeft += vol;
|
---|
979 | }
|
---|
980 |
|
---|
981 | // last reference into the right node
|
---|
982 | if (-- viewCell->mCounter == 0)
|
---|
983 | {
|
---|
984 | // view cell was previously seen from both nodes =>
|
---|
985 | // remove volume from right node
|
---|
986 | volRight -= vol;
|
---|
987 | }
|
---|
988 | }
|
---|
989 | }
|
---|
990 |
|
---|
991 |
|
---|
992 | void BvHierarchy::SetViewCellsManager(ViewCellsManager *vcm)
|
---|
993 | {
|
---|
994 | mViewCellsManager = vcm;
|
---|
995 | }
|
---|
996 |
|
---|
997 |
|
---|
998 | AxisAlignedBox3 BvHierarchy::GetBoundingBox() const
|
---|
999 | {
|
---|
1000 | return mBoundingBox;
|
---|
1001 | }
|
---|
1002 |
|
---|
1003 |
|
---|
1004 | float BvHierarchy::SelectObjectPartition(const BvhTraversalData &tData,
|
---|
1005 | ObjectContainer &frontObjects,
|
---|
1006 | ObjectContainer &backObjects)
|
---|
1007 | {
|
---|
1008 | ObjectContainer nFrontObjects[3];
|
---|
1009 | ObjectContainer nBackObjects[3];
|
---|
1010 |
|
---|
1011 | float nCostRatio[3];
|
---|
1012 |
|
---|
1013 | // create bounding box of node geometry
|
---|
1014 | AxisAlignedBox3 box = tData.mBoundingBox;
|
---|
1015 |
|
---|
1016 | int sAxis = 0;
|
---|
1017 | int bestAxis = -1;
|
---|
1018 |
|
---|
1019 | if (mOnlyDrivingAxis)
|
---|
1020 | {
|
---|
1021 | sAxis = box.Size().DrivingAxis();
|
---|
1022 | }
|
---|
1023 |
|
---|
1024 | ////////////////////////////////////////////
|
---|
1025 | //-- evaluate split cost for all three axis
|
---|
1026 |
|
---|
1027 | for (int axis = 0; axis < 3; ++ axis)
|
---|
1028 | {
|
---|
1029 | if (!mOnlyDrivingAxis || (axis == sAxis))
|
---|
1030 | {
|
---|
1031 | if (mUseCostHeuristics)
|
---|
1032 | {
|
---|
1033 | //-- partition objects using heuristics
|
---|
1034 | nCostRatio[axis] =
|
---|
1035 | EvalLocalCostHeuristics(
|
---|
1036 | tData,
|
---|
1037 | axis,
|
---|
1038 | nFrontObjects[axis],
|
---|
1039 | nBackObjects[axis]);
|
---|
1040 | }
|
---|
1041 | else
|
---|
1042 | {
|
---|
1043 | nCostRatio[axis] =
|
---|
1044 | EvalLocalObjectPartition(
|
---|
1045 | tData,
|
---|
1046 | axis,
|
---|
1047 | nFrontObjects[axis],
|
---|
1048 | nBackObjects[axis]);
|
---|
1049 | }
|
---|
1050 |
|
---|
1051 | if (bestAxis == -1)
|
---|
1052 | {
|
---|
1053 | bestAxis = axis;
|
---|
1054 | }
|
---|
1055 | else if (nCostRatio[axis] < nCostRatio[bestAxis])
|
---|
1056 | {
|
---|
1057 | bestAxis = axis;
|
---|
1058 | }
|
---|
1059 | }
|
---|
1060 | }
|
---|
1061 |
|
---|
1062 | /////////////////////////////////////
|
---|
1063 | //-- assign values
|
---|
1064 |
|
---|
1065 | frontObjects = nFrontObjects[bestAxis];
|
---|
1066 | backObjects = nBackObjects[bestAxis];
|
---|
1067 |
|
---|
1068 | //Debug << "val: " << nCostRatio[bestAxis] << " axis: " << bestAxis << endl;
|
---|
1069 | return nCostRatio[bestAxis];
|
---|
1070 | }
|
---|
1071 |
|
---|
1072 |
|
---|
1073 | void BvHierarchy::AssociateObjectsWithRays(const VssRayContainer &rays)
|
---|
1074 | {
|
---|
1075 |
|
---|
1076 | VssRayContainer::const_iterator rit, rit_end = rays.end();
|
---|
1077 |
|
---|
1078 | for (rit = rays.begin(); rit != rays.end(); ++ rit)
|
---|
1079 | {
|
---|
1080 | VssRay *ray = (*rit);
|
---|
1081 |
|
---|
1082 | if (ray->mTerminationObject)
|
---|
1083 | {
|
---|
1084 | ray->mTerminationObject->mVssRays.push_back(ray);
|
---|
1085 | }
|
---|
1086 |
|
---|
1087 | if (0 && ray->mOriginObject)
|
---|
1088 | {
|
---|
1089 | ray->mOriginObject->mVssRays.push_back(ray);
|
---|
1090 | }
|
---|
1091 | }
|
---|
1092 | }
|
---|
1093 |
|
---|
1094 |
|
---|
1095 | void BvHierarchy::PrintSubdivisionStats(const SubdivisionCandidate &sc)
|
---|
1096 | {
|
---|
1097 | const float costDecr = sc.GetRenderCostDecrease();
|
---|
1098 |
|
---|
1099 | mSubdivisionStats
|
---|
1100 | << "#Leaves\n" << mBvhStats.Leaves()
|
---|
1101 | << "#RenderCostDecrease\n" << costDecr << endl
|
---|
1102 | << "#TotalRenderCost\n" << mTotalCost << endl;
|
---|
1103 | //<< "#AvgRenderCost\n" << avgRenderCost << endl;
|
---|
1104 | }
|
---|
1105 |
|
---|
1106 |
|
---|
1107 | void BvHierarchy::CollectRays(const ObjectContainer &objects,
|
---|
1108 | VssRayContainer &rays) const
|
---|
1109 | {
|
---|
1110 | VssRay::NewMail();
|
---|
1111 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
1112 |
|
---|
1113 | // evaluate reverse pvs and view cell volume on left and right cell
|
---|
1114 | // note: should I take all leaf objects or rather the objects hit by rays?
|
---|
1115 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
1116 | {
|
---|
1117 | Intersectable *obj = *oit;
|
---|
1118 | VssRayContainer::const_iterator rit, rit_end = obj->mVssRays.end();
|
---|
1119 |
|
---|
1120 | for (rit = obj->mVssRays.begin(); rit < rit_end; ++ rit)
|
---|
1121 | {
|
---|
1122 | VssRay *ray = (*rit);
|
---|
1123 |
|
---|
1124 | if (!ray->Mailed())
|
---|
1125 | {
|
---|
1126 | ray->Mail();
|
---|
1127 | rays.push_back(ray);
|
---|
1128 | }
|
---|
1129 | }
|
---|
1130 | }
|
---|
1131 | }
|
---|
1132 |
|
---|
1133 |
|
---|
1134 | float BvHierarchy::EvalRenderCost(const BvhTraversalData &tData,
|
---|
1135 | const ObjectContainer &objectsFront,
|
---|
1136 | const ObjectContainer &objectsBack) const
|
---|
1137 | {
|
---|
1138 | BvhLeaf *leaf = tData.mNode;
|
---|
1139 |
|
---|
1140 | // probability that view point lies in a view cell which sees this node
|
---|
1141 | const float pFront = EvalViewCellsVolume(objectsFront);
|
---|
1142 | const float pBack = EvalViewCellsVolume(objectsBack);
|
---|
1143 |
|
---|
1144 | const int totalObjects = (int)leaf->mObjects.size();
|
---|
1145 | const int nObjectsFront = (int)objectsFront.size();
|
---|
1146 | const int nObjectsBack = (int)objectsBack.size();
|
---|
1147 |
|
---|
1148 | //-- pvs rendering heuristics
|
---|
1149 | const float newRenderCost = nObjectsFront * pFront + nObjectsBack * pBack;
|
---|
1150 |
|
---|
1151 | #ifdef _DEBUG
|
---|
1152 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
1153 | Debug << "\nbvh render cost\n"
|
---|
1154 | << "back p: " << pBack / viewSpaceVol << " front p " << pFront / viewSpaceVol << endl
|
---|
1155 | << "new rc: " << newRenderCost / viewSpaceVol << endl;*/
|
---|
1156 | #endif
|
---|
1157 |
|
---|
1158 | return newRenderCost;
|
---|
1159 | }
|
---|
1160 |
|
---|
1161 |
|
---|
1162 | AxisAlignedBox3 BvHierarchy::ComputeBoundingBox(const ObjectContainer &objects,
|
---|
1163 | const AxisAlignedBox3 *parentBox)
|
---|
1164 | {
|
---|
1165 | if (parentBox && objects.empty())
|
---|
1166 | return *parentBox;
|
---|
1167 |
|
---|
1168 | AxisAlignedBox3 box;
|
---|
1169 | box.Initialize();
|
---|
1170 |
|
---|
1171 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
1172 |
|
---|
1173 | //-- compute bounding box
|
---|
1174 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
1175 | {
|
---|
1176 | Intersectable *obj = *oit;
|
---|
1177 |
|
---|
1178 | // compute bounding box of view space
|
---|
1179 | box.Include(obj->GetBox());
|
---|
1180 | }
|
---|
1181 |
|
---|
1182 | return box;
|
---|
1183 | }
|
---|
1184 |
|
---|
1185 |
|
---|
1186 | void BvHierarchy::CollectLeaves(vector<BvhLeaf *> &leaves) const
|
---|
1187 | {
|
---|
1188 | stack<BvhNode *> nodeStack;
|
---|
1189 | nodeStack.push(mRoot);
|
---|
1190 |
|
---|
1191 | while (!nodeStack.empty())
|
---|
1192 | {
|
---|
1193 | BvhNode *node = nodeStack.top();
|
---|
1194 | nodeStack.pop();
|
---|
1195 |
|
---|
1196 | if (node->IsLeaf())
|
---|
1197 | {
|
---|
1198 | BvhLeaf *leaf = (BvhLeaf *)node;
|
---|
1199 | leaves.push_back(leaf);
|
---|
1200 | }
|
---|
1201 | else
|
---|
1202 | {
|
---|
1203 | BvhInterior *interior = (BvhInterior *)node;
|
---|
1204 |
|
---|
1205 | nodeStack.push(interior->GetBack());
|
---|
1206 | nodeStack.push(interior->GetFront());
|
---|
1207 | }
|
---|
1208 | }
|
---|
1209 | }
|
---|
1210 |
|
---|
1211 |
|
---|
1212 | AxisAlignedBox3 BvHierarchy::GetBoundingBox(BvhNode *node) const
|
---|
1213 | {
|
---|
1214 | return node->GetBoundingBox();
|
---|
1215 | }
|
---|
1216 |
|
---|
1217 |
|
---|
1218 | void BvHierarchy::CollectViewCells(const ObjectContainer &objects,
|
---|
1219 | ViewCellContainer &viewCells,
|
---|
1220 | const bool setCounter) const
|
---|
1221 | {
|
---|
1222 | ViewCell::NewMail();
|
---|
1223 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
1224 |
|
---|
1225 | // loop through all object and collect view cell pvs of this node
|
---|
1226 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
1227 | {
|
---|
1228 | CollectViewCells(*oit, viewCells, true, setCounter);
|
---|
1229 | }
|
---|
1230 | }
|
---|
1231 |
|
---|
1232 |
|
---|
1233 | void BvHierarchy::CollectViewCells(Intersectable *obj,
|
---|
1234 | ViewCellContainer &viewCells,
|
---|
1235 | const bool useMailBoxing,
|
---|
1236 | const bool setCounter) const
|
---|
1237 | {
|
---|
1238 | VssRayContainer::const_iterator rit, rit_end = obj->mVssRays.end();
|
---|
1239 |
|
---|
1240 | for (rit = obj->mVssRays.begin(); rit < rit_end; ++ rit)
|
---|
1241 | {
|
---|
1242 | VssRay *ray = (*rit);
|
---|
1243 | ViewCellContainer tmpViewCells;
|
---|
1244 |
|
---|
1245 | mVspTree->GetViewCells(*ray, tmpViewCells);
|
---|
1246 |
|
---|
1247 | ViewCellContainer::const_iterator vit, vit_end = tmpViewCells.end();
|
---|
1248 |
|
---|
1249 | for (vit = tmpViewCells.begin(); vit != vit_end; ++ vit)
|
---|
1250 | {
|
---|
1251 | VspViewCell *vc = dynamic_cast<VspViewCell *>(*vit);
|
---|
1252 |
|
---|
1253 | // store view cells
|
---|
1254 | if (!useMailBoxing || !vc->Mailed())
|
---|
1255 | {
|
---|
1256 | if (useMailBoxing)
|
---|
1257 | {
|
---|
1258 | vc->Mail();
|
---|
1259 | if (setCounter)
|
---|
1260 | {
|
---|
1261 | vc->mCounter = 0;
|
---|
1262 | }
|
---|
1263 | }
|
---|
1264 | viewCells.push_back(vc);
|
---|
1265 | }
|
---|
1266 |
|
---|
1267 | if (setCounter)
|
---|
1268 | {
|
---|
1269 | ++ vc->mCounter;
|
---|
1270 | }
|
---|
1271 | }
|
---|
1272 | }
|
---|
1273 | }
|
---|
1274 |
|
---|
1275 |
|
---|
1276 | void BvHierarchy::CollectDirtyCandidates(BvhSubdivisionCandidate *sc,
|
---|
1277 | vector<SubdivisionCandidate *> &dirtyList)
|
---|
1278 | {
|
---|
1279 | BvhTraversalData &tData = sc->mParentData;
|
---|
1280 | BvhLeaf *node = tData.mNode;
|
---|
1281 |
|
---|
1282 | ViewCellContainer viewCells;
|
---|
1283 | CollectViewCells(node->mObjects, viewCells);
|
---|
1284 |
|
---|
1285 | // split candidates handling
|
---|
1286 | // these view cells are thrown into dirty list
|
---|
1287 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
1288 |
|
---|
1289 | Debug << "collecting " << (int)viewCells.size() << " dirty candidates" << endl;
|
---|
1290 |
|
---|
1291 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
1292 | {
|
---|
1293 | VspViewCell *vc = dynamic_cast<VspViewCell *>(*vit);
|
---|
1294 | VspLeaf *leaf = vc->mLeaf;
|
---|
1295 | SubdivisionCandidate *candidate = leaf->GetSubdivisionCandidate();
|
---|
1296 |
|
---|
1297 | if (candidate) // is this leaf still a split candidate?
|
---|
1298 | {
|
---|
1299 | dirtyList.push_back(candidate);
|
---|
1300 | }
|
---|
1301 | }
|
---|
1302 | }
|
---|
1303 |
|
---|
1304 |
|
---|
1305 | BvhNode *BvHierarchy::GetRoot() const
|
---|
1306 | {
|
---|
1307 | return mRoot;
|
---|
1308 | }
|
---|
1309 |
|
---|
1310 |
|
---|
1311 | bool BvHierarchy::IsObjectInLeaf(BvhLeaf *leaf, Intersectable *object) const
|
---|
1312 | {
|
---|
1313 | ObjectContainer::const_iterator oit =
|
---|
1314 | lower_bound(leaf->mObjects.begin(), leaf->mObjects.end(), object, ilt);
|
---|
1315 |
|
---|
1316 | // objects sorted by id
|
---|
1317 | if ((oit != leaf->mObjects.end()) && ((*oit)->GetId() == object->GetId()))
|
---|
1318 | {
|
---|
1319 | return true;
|
---|
1320 | }
|
---|
1321 | else
|
---|
1322 | {
|
---|
1323 | return false;
|
---|
1324 | }
|
---|
1325 | }
|
---|
1326 |
|
---|
1327 |
|
---|
1328 | BvhLeaf *BvHierarchy::GetLeaf(Intersectable *object, BvhNode *node) const
|
---|
1329 | {
|
---|
1330 | // rather use the simple version
|
---|
1331 | if (!object) return NULL;
|
---|
1332 | return object->mBvhLeaf;
|
---|
1333 |
|
---|
1334 | ///////////////////////////////////////
|
---|
1335 | // start from root of tree
|
---|
1336 |
|
---|
1337 | if (node == NULL)
|
---|
1338 | node = mRoot;
|
---|
1339 |
|
---|
1340 | vector<BvhLeaf *> leaves;
|
---|
1341 |
|
---|
1342 | stack<BvhNode *> nodeStack;
|
---|
1343 | nodeStack.push(node);
|
---|
1344 |
|
---|
1345 | BvhLeaf *leaf = NULL;
|
---|
1346 |
|
---|
1347 | while (!nodeStack.empty())
|
---|
1348 | {
|
---|
1349 | BvhNode *node = nodeStack.top();
|
---|
1350 | nodeStack.pop();
|
---|
1351 |
|
---|
1352 | if (node->IsLeaf())
|
---|
1353 | {
|
---|
1354 | leaf = dynamic_cast<BvhLeaf *>(node);
|
---|
1355 |
|
---|
1356 | if (IsObjectInLeaf(leaf, object))
|
---|
1357 | {
|
---|
1358 | return leaf;
|
---|
1359 | }
|
---|
1360 | }
|
---|
1361 | else
|
---|
1362 | {
|
---|
1363 | // find point
|
---|
1364 | BvhInterior *interior = dynamic_cast<BvhInterior *>(node);
|
---|
1365 |
|
---|
1366 | if (interior->GetBack()->GetBoundingBox().Includes(object->GetBox()))
|
---|
1367 | {
|
---|
1368 | nodeStack.push(interior->GetBack());
|
---|
1369 | }
|
---|
1370 |
|
---|
1371 | // search both sides as we are using bounding volumes
|
---|
1372 | if (interior->GetFront()->GetBoundingBox().Includes(object->GetBox()))
|
---|
1373 | {
|
---|
1374 | nodeStack.push(interior->GetFront());
|
---|
1375 | }
|
---|
1376 | }
|
---|
1377 | }
|
---|
1378 |
|
---|
1379 | return leaf;
|
---|
1380 | }
|
---|
1381 |
|
---|
1382 |
|
---|
1383 | BvhIntersectable *BvHierarchy::GetOrCreateBvhIntersectable(BvhNode *node)
|
---|
1384 | {
|
---|
1385 | // search nodes
|
---|
1386 | std::map<BvhNode *, BvhIntersectable *>::
|
---|
1387 | const_iterator it = mBvhIntersectables.find(node);
|
---|
1388 |
|
---|
1389 | if (it != mBvhIntersectables.end())
|
---|
1390 | {
|
---|
1391 | return (*it).second;
|
---|
1392 | }
|
---|
1393 |
|
---|
1394 | // not in map => create new entry
|
---|
1395 | BvhIntersectable *bvhObj = new BvhIntersectable(node);
|
---|
1396 | mBvhIntersectables[node] = bvhObj;
|
---|
1397 |
|
---|
1398 | return bvhObj;
|
---|
1399 | }
|
---|
1400 |
|
---|
1401 |
|
---|
1402 | bool BvHierarchy::Export(OUT_STREAM &stream)
|
---|
1403 | {
|
---|
1404 | ExportNode(mRoot, stream);
|
---|
1405 |
|
---|
1406 | return true;
|
---|
1407 | }
|
---|
1408 |
|
---|
1409 |
|
---|
1410 | void BvHierarchy::ExportObjects(BvhLeaf *leaf, OUT_STREAM &stream)
|
---|
1411 | {
|
---|
1412 | ObjectContainer::const_iterator oit, oit_end = leaf->mObjects.end();
|
---|
1413 | for (oit = leaf->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
1414 | {
|
---|
1415 | stream << (*oit)->GetId() << " ";
|
---|
1416 | }
|
---|
1417 | }
|
---|
1418 |
|
---|
1419 |
|
---|
1420 | void BvHierarchy::ExportNode(BvhNode *node, OUT_STREAM &stream)
|
---|
1421 | {
|
---|
1422 | if (node->IsLeaf())
|
---|
1423 | {
|
---|
1424 | BvhLeaf *leaf = dynamic_cast<BvhLeaf *>(node);
|
---|
1425 | const AxisAlignedBox3 box = leaf->GetBoundingBox();
|
---|
1426 | stream << "<Leaf"
|
---|
1427 | << " min=\"" << box.Min().x << " " << box.Min().y << " " << box.Min().z << "\""
|
---|
1428 | << " max=\"" << box.Max().x << " " << box.Max().y << " " << box.Max().z << "\""
|
---|
1429 | << " objects=\"";
|
---|
1430 |
|
---|
1431 | //-- export objects
|
---|
1432 | ExportObjects(leaf, stream);
|
---|
1433 |
|
---|
1434 | stream << "\" />" << endl;
|
---|
1435 | }
|
---|
1436 | else
|
---|
1437 | {
|
---|
1438 | BvhInterior *interior = dynamic_cast<BvhInterior *>(node);
|
---|
1439 | const AxisAlignedBox3 box = interior->GetBoundingBox();
|
---|
1440 |
|
---|
1441 | stream << "<Interior"
|
---|
1442 | << " min=\"" << box.Min().x << " " << box.Min().y << " " << box.Min().z << "\""
|
---|
1443 | << " max=\"" << box.Max().x << " " << box.Max().y << " " << box.Max().z
|
---|
1444 | << "\">" << endl;
|
---|
1445 |
|
---|
1446 | ExportNode(interior->GetBack(), stream);
|
---|
1447 | ExportNode(interior->GetFront(), stream);
|
---|
1448 |
|
---|
1449 | stream << "</Interior>" << endl;
|
---|
1450 | }
|
---|
1451 | }
|
---|
1452 |
|
---|
1453 |
|
---|
1454 | float BvHierarchy::EvalViewCellsVolume(const ObjectContainer &objects) const
|
---|
1455 | {
|
---|
1456 | float vol = 0;
|
---|
1457 |
|
---|
1458 | ViewCellContainer viewCells;
|
---|
1459 | CollectViewCells(objects, viewCells);
|
---|
1460 |
|
---|
1461 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
1462 |
|
---|
1463 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
1464 | {
|
---|
1465 | vol += (*vit)->GetVolume();
|
---|
1466 | }
|
---|
1467 |
|
---|
1468 | return vol;
|
---|
1469 | }
|
---|
1470 |
|
---|
1471 |
|
---|
1472 | void BvHierarchy::CreateRoot(const ObjectContainer &objects)
|
---|
1473 | {
|
---|
1474 | //-- create new root
|
---|
1475 | AxisAlignedBox3 box = ComputeBoundingBox(objects);
|
---|
1476 | BvhLeaf *bvhleaf = new BvhLeaf(box, NULL, (int)objects.size());
|
---|
1477 | bvhleaf->mObjects = objects;
|
---|
1478 | mRoot = bvhleaf;
|
---|
1479 |
|
---|
1480 | // associate root with current objects
|
---|
1481 | AssociateObjectsWithLeaf(bvhleaf);
|
---|
1482 | }
|
---|
1483 |
|
---|
1484 |
|
---|
1485 | SubdivisionCandidate *BvHierarchy::PrepareConstruction(const VssRayContainer &sampleRays,
|
---|
1486 | const ObjectContainer &objects)
|
---|
1487 | {
|
---|
1488 | ///////////////////////////////////////////////////////////////
|
---|
1489 | // note matt: we assume that we have objects sorted by their id
|
---|
1490 |
|
---|
1491 | mBvhStats.Reset();
|
---|
1492 | mBvhStats.Start();
|
---|
1493 | mBvhStats.nodes = 1;
|
---|
1494 |
|
---|
1495 | // store pointer to this tree
|
---|
1496 | BvhSubdivisionCandidate::sBvHierarchy = this;
|
---|
1497 | mBvhStats.nodes = 1;
|
---|
1498 |
|
---|
1499 | // compute bounding box from objects
|
---|
1500 | // note: we assume that root was already created
|
---|
1501 | mBoundingBox = mRoot->GetBoundingBox();
|
---|
1502 | BvhLeaf *bvhleaf = dynamic_cast<BvhLeaf *>(mRoot);
|
---|
1503 |
|
---|
1504 | mTermMinProbability *= mBoundingBox.GetVolume();
|
---|
1505 | mGlobalCostMisses = 0;
|
---|
1506 |
|
---|
1507 | // only rays intersecting objects in node are interesting
|
---|
1508 | AssociateObjectsWithRays(sampleRays);
|
---|
1509 |
|
---|
1510 | // probabilty is voume of all "seen" view cells
|
---|
1511 | #if 1
|
---|
1512 | const float prop = EvalViewCellsVolume(objects);
|
---|
1513 | #else
|
---|
1514 | const float prop = GetBoundingBox().GetVolume();
|
---|
1515 | #endif
|
---|
1516 |
|
---|
1517 | // create bvh traversal data
|
---|
1518 | BvhTraversalData oData(bvhleaf, 0, mBoundingBox, prop);
|
---|
1519 |
|
---|
1520 | // create sorted object lists for the first data
|
---|
1521 | if (mUseGlobalSorting)
|
---|
1522 | {
|
---|
1523 | CreateInitialSortedObjectList(oData);
|
---|
1524 | }
|
---|
1525 |
|
---|
1526 |
|
---|
1527 | ////////////////////////////////////////////////////
|
---|
1528 | //-- add first candidate for object space partition
|
---|
1529 |
|
---|
1530 | BvhSubdivisionCandidate *oSubdivisionCandidate =
|
---|
1531 | new BvhSubdivisionCandidate(oData);
|
---|
1532 |
|
---|
1533 | EvalSubdivisionCandidate(*oSubdivisionCandidate);
|
---|
1534 | bvhleaf->SetSubdivisionCandidate(oSubdivisionCandidate);
|
---|
1535 |
|
---|
1536 | const float viewSpaceVol = mVspTree->GetBoundingBox().GetVolume();
|
---|
1537 | mTotalCost = (float)objects.size() * prop / viewSpaceVol;
|
---|
1538 |
|
---|
1539 | PrintSubdivisionStats(*oSubdivisionCandidate);
|
---|
1540 |
|
---|
1541 | return oSubdivisionCandidate;
|
---|
1542 | }
|
---|
1543 |
|
---|
1544 |
|
---|
1545 | bool BvHierarchy::AddLeafToPvs(BvhLeaf *leaf,
|
---|
1546 | ViewCell *vc,
|
---|
1547 | const float pdf,
|
---|
1548 | float &contribution)
|
---|
1549 | {
|
---|
1550 | // add kd intersecable to pvs
|
---|
1551 | BvhIntersectable *bvhObj = GetOrCreateBvhIntersectable(leaf);
|
---|
1552 |
|
---|
1553 | return vc->AddPvsSample(bvhObj, pdf, contribution);
|
---|
1554 | }
|
---|
1555 |
|
---|
1556 |
|
---|
1557 | void BvHierarchy::CreateInitialSortedObjectList(BvhTraversalData &tData)
|
---|
1558 | {
|
---|
1559 | SortableEntryContainer *sortedObjects = new SortableEntryContainer();
|
---|
1560 |
|
---|
1561 | // we sort the objects as a preprocess so they don't have
|
---|
1562 | // to be sorted for each split
|
---|
1563 | for (int i = 0; i < 3; ++ i)
|
---|
1564 | {
|
---|
1565 | CreateLocalSubdivisionCandidates(tData.mNode->mObjects, &sortedObjects, true, i);
|
---|
1566 |
|
---|
1567 | tData.mSortedObjects[i] = new ObjectContainer();
|
---|
1568 | tData.mSortedObjects[i]->reserve((int)sortedObjects->size());
|
---|
1569 |
|
---|
1570 | SortableEntryContainer::const_iterator oit, oit_end = sortedObjects->end();
|
---|
1571 | for (oit = sortedObjects->begin(); oit != oit_end; ++ oit)
|
---|
1572 | {
|
---|
1573 | tData.mSortedObjects[i]->push_back((*oit).mObject);
|
---|
1574 | }
|
---|
1575 | }
|
---|
1576 |
|
---|
1577 | delete sortedObjects;
|
---|
1578 | }
|
---|
1579 |
|
---|
1580 |
|
---|
1581 | void BvHierarchy::AssignSortedObjects(const BvhSubdivisionCandidate &sc,
|
---|
1582 | BvhTraversalData &frontData,
|
---|
1583 | BvhTraversalData &backData)
|
---|
1584 | {
|
---|
1585 | Intersectable::NewMail();
|
---|
1586 |
|
---|
1587 | // we sorted the objects as a preprocess so they don't have
|
---|
1588 | // to be sorted for each split
|
---|
1589 | ObjectContainer::const_iterator fit, fit_end = sc.mFrontObjects.end();
|
---|
1590 |
|
---|
1591 | for (fit = sc.mFrontObjects.begin(); fit != fit_end; ++ fit)
|
---|
1592 | {
|
---|
1593 | (*fit)->Mail();
|
---|
1594 | }
|
---|
1595 |
|
---|
1596 | for (int i = 0; i < 3; ++ i)
|
---|
1597 | {
|
---|
1598 | frontData.mSortedObjects[i]->reserve((int)sc.mFrontObjects.size());
|
---|
1599 | backData.mSortedObjects[i]->reserve((int)sc.mFrontObjects.size());
|
---|
1600 |
|
---|
1601 | ObjectContainer::const_iterator oit, oit_end = sc.mParentData.mNode->mObjects.end();
|
---|
1602 |
|
---|
1603 | for (oit = sc.mParentData.mNode->mObjects.begin(); oit != oit_end; ++ oit)
|
---|
1604 | {
|
---|
1605 | if ((*oit)->Mailed())
|
---|
1606 | {
|
---|
1607 | frontData.mSortedObjects[i]->push_back(*oit);
|
---|
1608 | }
|
---|
1609 | else
|
---|
1610 | {
|
---|
1611 | backData.mSortedObjects[i]->push_back(*oit);
|
---|
1612 | }
|
---|
1613 | }
|
---|
1614 | }
|
---|
1615 | }
|
---|
1616 |
|
---|
1617 |
|
---|
1618 | void BvhStatistics::Print(ostream &app) const
|
---|
1619 | {
|
---|
1620 | app << "=========== BvHierarchy statistics ===============\n";
|
---|
1621 |
|
---|
1622 | app << setprecision(4);
|
---|
1623 |
|
---|
1624 | app << "#N_CTIME ( Construction time [s] )\n" << Time() << " \n";
|
---|
1625 |
|
---|
1626 | app << "#N_NODES ( Number of nodes )\n" << nodes << "\n";
|
---|
1627 |
|
---|
1628 | app << "#N_INTERIORS ( Number of interior nodes )\n" << Interior() << "\n";
|
---|
1629 |
|
---|
1630 | app << "#N_LEAVES ( Number of leaves )\n" << Leaves() << "\n";
|
---|
1631 |
|
---|
1632 | app << "#AXIS_ALIGNED_SPLITS (number of axis aligned splits)\n" << splits << endl;
|
---|
1633 |
|
---|
1634 | app << "#N_PMINDEPTHLEAVES ( Percentage of leaves at minimum depth )\n"
|
---|
1635 | << minDepthNodes * 100 / (double)Leaves() << endl;
|
---|
1636 |
|
---|
1637 | app << "#N_PMAXDEPTHLEAVES ( Percentage of leaves at maximum depth )\n"
|
---|
1638 | << maxDepthNodes * 100 / (double)Leaves() << endl;
|
---|
1639 |
|
---|
1640 | app << "#N_MAXCOSTNODES ( Percentage of leaves with terminated because of max cost ratio )\n"
|
---|
1641 | << maxCostNodes * 100 / (double)Leaves() << endl;
|
---|
1642 |
|
---|
1643 | app << "#N_PMINPROBABILITYLEAVES ( Percentage of leaves with mininum probability )\n"
|
---|
1644 | << minProbabilityNodes * 100 / (double)Leaves() << endl;
|
---|
1645 |
|
---|
1646 | app << "#N_PMINOBJECTSLEAVES ( Percentage of leaves with mininum objects )\n"
|
---|
1647 | << minObjectsNodes * 100 / (double)Leaves() << endl;
|
---|
1648 |
|
---|
1649 | app << "#N_PMAXDEPTH ( Maximal reached depth )\n" << maxDepth << endl;
|
---|
1650 |
|
---|
1651 | app << "#N_PMINDEPTH ( Minimal reached depth )\n" << minDepth << endl;
|
---|
1652 |
|
---|
1653 | app << "#AVGDEPTH ( average depth )\n" << AvgDepth() << endl;
|
---|
1654 |
|
---|
1655 | app << "#N_INVALIDLEAVES (number of invalid leaves )\n" << invalidLeaves << endl;
|
---|
1656 |
|
---|
1657 | app << "#N_MAXOBJECTREFS ( Max number of object refs / leaf )\n" << maxObjectRefs << "\n";
|
---|
1658 |
|
---|
1659 | //app << "#N_RAYS (number of rays / leaf)\n" << AvgRays() << endl;
|
---|
1660 |
|
---|
1661 | app << "========== END OF VspTree statistics ==========\n";
|
---|
1662 | }
|
---|
1663 |
|
---|
1664 |
|
---|
1665 | } |
---|