1 | #include <time.h>
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2 | #include <iomanip>
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3 | #include <stack>
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4 |
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5 |
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6 | #include "ViewCell.h"
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7 | #include "Mesh.h"
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8 | #include "Intersectable.h"
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9 | #include "KdTree.h"
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10 | #include "Triangle3.h"
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11 | #include "common.h"
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12 | #include "Environment.h"
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13 | #include "ViewCellsManager.h"
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14 | #include "Exporter.h"
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15 | #include "BvHierarchy.h"
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16 |
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17 |
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18 |
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19 | namespace GtpVisibilityPreprocessor {
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20 |
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21 |
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22 |
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23 | template <typename T> class myless
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24 | {
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25 | public:
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26 | bool operator() (T v1, T v2) const
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27 | {
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28 | return (v1->GetMergeCost() < v2->GetMergeCost());
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29 | }
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30 | };
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31 |
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32 |
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33 | typedef priority_queue<ViewCell *, vector<ViewCell *>,
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34 | myless<vector<ViewCell *>::value_type> > TraversalQueue;
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35 |
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36 | int ViewCell::sMailId = 10000;//2147483647;
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37 | int ViewCell::sReservedMailboxes = 1;
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38 |
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39 |
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40 | float MergeCandidate::sRenderCostWeight = 0;
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41 |
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42 |
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43 | // pvs penalty can be different from pvs size
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44 | inline static float EvalPvsPenalty(const float pvs,
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45 | const float lower,
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46 | const float upper)
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47 | {
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48 | // clamp to minmax values
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49 | if (pvs < lower)
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50 | return (float)lower;
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51 | if (pvs > upper)
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52 | return (float)upper;
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53 |
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54 | return (float)pvs;
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55 | }
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56 |
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57 | /** Counts contribution of the view cell to the pvs.
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58 | */
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59 | inline int CountPvsContribution(ViewCell *vc)
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60 | {
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61 | int count = 0;
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62 |
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63 | ObjectPvsIterator pit = vc->GetPvs().GetIterator();
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64 |
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65 | while (pit.HasMoreEntries())
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66 | {
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67 | ObjectPvsEntry entry = pit.Next();
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68 |
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69 | if (!entry.mObject->Mailed())
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70 | {
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71 | entry.mObject->Mail();
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72 | ++ count;
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73 | }
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74 | }
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75 |
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76 | return count;
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77 | }
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78 |
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79 |
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80 | /// Fast computation of merged pvs size
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81 | static float ComputeMergedPvsCost(const ObjectPvs &pvs1,
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82 | const ObjectPvs &pvs2)
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83 | {
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84 | // add first pvs
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85 | float pvs = (float)pvs1.GetSize();
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86 |
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87 | Intersectable::NewMail();
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88 |
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89 | // mail all objects in first pvs
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90 | ObjectPvsIterator pit = pvs1.GetIterator();
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91 |
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92 | while (pit.HasMoreEntries())
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93 | {
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94 | ObjectPvsEntry entry = pit.Next();
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95 | entry.mObject->Mail();
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96 | }
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97 |
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98 | pit = pvs2.GetIterator();
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99 |
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100 | while (pit.HasMoreEntries())
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101 | {
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102 | ObjectPvsEntry entry = pit.Next();
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103 |
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104 | Intersectable *obj = entry.mObject;
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105 | if (!obj->Mailed())
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106 | ++ pvs;
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107 | }
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108 |
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109 | return pvs;
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110 | }
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111 |
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112 |
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113 | ViewCell::ViewCell():
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114 | MeshInstance(NULL),
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115 | mArea(-1),
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116 | mVolume(-1),
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117 | mValid(true),
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118 | mParent(NULL),
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119 | mMergeCost(0),
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120 | mPvsCost(0),
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121 | mEntriesInPvs(0),
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122 | mPvsSizeValid(false),
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123 | mFilteredPvsSize(0)
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124 | {
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125 | mId = -100;
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126 | }
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127 |
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128 | ViewCell::ViewCell(Mesh *mesh):
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129 | MeshInstance(mesh),
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130 | mArea(-1),
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131 | mVolume(-1),
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132 | mValid(true),
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133 | mParent(NULL),
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134 | mMergeCost(0),
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135 | mPvsCost(0),
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136 | mPvsSizeValid(false),
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137 | mFilteredPvsSize(0)
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138 | //mMailbox(0)
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139 | {
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140 | mId = -100;
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141 | }
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142 |
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143 |
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144 | ViewCell::~ViewCell()
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145 | {
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146 | }
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147 |
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148 |
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149 | const ObjectPvs &ViewCell::GetPvs() const
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150 | {
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151 | return mPvs;
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152 | }
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153 |
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154 |
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155 | ObjectPvs &ViewCell::GetPvs()
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156 | {
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157 | return mPvs;
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158 | }
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159 |
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160 |
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161 | void ViewCell::SetPvs(const ObjectPvs &pvs)
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162 | {
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163 | mPvs = pvs;
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164 | }
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165 |
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166 |
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167 | int ViewCell::Type() const
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168 | {
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169 | return VIEW_CELL;
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170 | }
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171 |
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172 |
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173 | float ViewCell::GetVolume() const
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174 | {
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175 | return mVolume;
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176 | }
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177 |
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178 |
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179 | void ViewCell::SetVolume(float volume)
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180 | {
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181 | mVolume = volume;
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182 | }
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183 |
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184 |
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185 | void ViewCell::SetMesh(Mesh *mesh)
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186 | {
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187 | mMesh = mesh;
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188 | }
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189 |
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190 |
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191 | float ViewCell::GetArea() const
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192 | {
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193 | return mArea;
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194 | }
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195 |
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196 |
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197 | void ViewCell::SetArea(float area)
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198 | {
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199 | mArea = area;
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200 | }
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201 |
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202 |
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203 | void ViewCell::SetColor(const RgbColor &color)
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204 | {
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205 | mColor = color;
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206 | }
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207 |
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208 |
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209 | RgbColor ViewCell::GetColor() const
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210 | {
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211 | return mColor;
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212 | }
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213 |
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214 |
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215 | void ViewCell::SetValid(const bool valid)
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216 | {
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217 | mValid = valid;
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218 | }
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219 |
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220 |
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221 | bool ViewCell::GetValid() const
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222 | {
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223 | return mValid;
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224 | }
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225 |
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226 |
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227 | void ViewCell::SetParent(ViewCellInterior *parent)
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228 | {
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229 | mParent = parent;
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230 | }
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231 |
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232 |
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233 | bool ViewCell::IsRoot() const
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234 | {
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235 | return !mParent;
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236 | }
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237 |
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238 |
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239 | ViewCellInterior *ViewCell::GetParent() const
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240 | {
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241 | return mParent;
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242 | }
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243 |
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244 |
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245 | void ViewCell::SetMergeCost(const float mergeCost)
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246 | {
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247 | mMergeCost = mergeCost;
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248 | }
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249 |
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250 |
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251 | float ViewCell::GetRenderCost() const
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252 | {
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253 | return mPvsCost * GetVolume();
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254 | }
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255 |
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256 |
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257 | float ViewCell::GetMergeCost() const
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258 | {
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259 | return mMergeCost;
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260 | }
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261 |
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262 |
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263 | bool ViewCell::AddPvsSample(Intersectable *sample,
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264 | const float pdf,
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265 | float &contribution)
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266 | {
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267 | const bool result = mPvs.AddSample(sample, pdf);//, contribution);
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268 | // have to recompute pvs size
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269 | mPvsSizeValid = false;
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270 |
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271 | return result;
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272 | }
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273 |
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274 |
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275 |
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276 | /************************************************************************/
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277 | /* class ViewCellInterior implementation */
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278 | /************************************************************************/
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279 |
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280 |
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281 | ViewCellInterior::ViewCellInterior()
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282 | {
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283 | }
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284 |
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285 |
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286 | ViewCellInterior::~ViewCellInterior()
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287 | {
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288 | ViewCellContainer::const_iterator it, it_end = mChildren.end();
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289 |
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290 | for (it = mChildren.begin(); it != it_end; ++ it)
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291 | {
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292 | delete (*it);
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293 | }
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294 | }
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295 |
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296 |
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297 | ViewCellInterior::ViewCellInterior(Mesh *mesh):
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298 | ViewCell(mesh)
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299 | {
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300 | }
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301 |
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302 |
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303 | bool ViewCellInterior::IsLeaf() const
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304 | {
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305 | return false;
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306 | }
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307 |
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308 |
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309 | void ViewCellInterior::SetupChildLink(ViewCell *vc)
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310 | {
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311 | mChildren.push_back(vc);
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312 | vc->SetParent(this);
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313 | }
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314 |
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315 |
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316 | void ViewCellInterior::RemoveChildLink(ViewCell *l)
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317 | {
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318 | // erase leaf from old view cell
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319 | ViewCellContainer::iterator it = mChildren.begin();
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320 |
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321 | for (; (*it) != l; ++ it);
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322 | if (it == mChildren.end())
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323 | Debug << "error" << endl;
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324 | else
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325 | mChildren.erase(it);
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326 | }
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327 |
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328 |
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329 | void ViewCellInterior::ReplaceChildLink(ViewCell *prev, ViewCell *cur)
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330 | {
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331 | // erase leaf from old view cell
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332 | ViewCellContainer::iterator it = mChildren.begin();
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333 |
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334 | for (; (*it) != prev; ++ it);
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335 | if (it == mChildren.end())
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336 | {
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337 | Debug << "error: child link not found" << endl;
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338 | }
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339 | else
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340 | {
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341 | (*it) = cur;
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342 | }
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343 | }
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344 |
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345 |
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346 |
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347 | /************************************************************************/
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348 | /* class ViewCellsStatistics implementation */
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349 | /************************************************************************/
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350 |
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351 |
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352 | void ViewCellsStatistics::Print(ostream &app) const
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353 | {
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354 | app << "=========== View Cells Statistics ===============\n";
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355 |
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356 | app << setprecision(4);
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357 |
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358 | //app << "#N_CTIME ( Construction time [s] )\n" << Time() << " \n";
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359 |
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360 | app << "#N_OVERALLPVS ( cost of the PVS )\n" << pvsCost << endl;
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361 |
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362 | //app << "#N_PVSENTRIES ( entries in the PVS)\n" << pvsEntries << endl;
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363 |
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364 | app << "#N_PMAXPVS ( largest PVS )\n" << maxPvs << endl;
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365 |
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366 | app << "#N_PMINPVS ( smallest PVS )\n" << minPvs << endl;
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367 |
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368 | app << "#N_PAVGPVS ( average PVS )\n" << AvgPvs() << endl;
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369 |
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370 | app << "#N_PEMPTYPVS ( view cells with empty PVS )\n" << emptyPvs << endl;
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371 |
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372 | app << "#N_VIEWCELLS ( number of view cells)\n" << viewCells << endl;
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373 |
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374 | app << "#N_AVGLEAVES (average number of leaves per view cell )\n" << AvgLeaves() << endl;
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375 |
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376 | app << "#N_MAXLEAVES ( maximal number of leaves per view cell )\n" << maxLeaves << endl;
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377 |
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378 | app << "#N_INVALID ( number of invalid view cells )\n" << invalid << endl;
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379 |
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380 | app << "========== End of View Cells Statistics ==========\n";
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381 | }
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382 |
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383 |
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384 | /*************************************************************************/
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385 | /* class ViewCellsTree implementation */
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386 | /*************************************************************************/
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387 |
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388 |
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389 | ViewCellsTree::ViewCellsTree(ViewCellsManager *vcm):
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390 | mRoot(NULL),
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391 | mUseAreaForPvs(false),
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392 | mViewCellsManager(vcm),
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393 | #if 0
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394 | mViewCellsStorage(PVS_IN_INTERIORS)
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395 | #else
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396 | mViewCellsStorage(PVS_IN_LEAVES)
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397 | #endif
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398 | {
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399 | ReadEnvironment();
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400 | MergeCandidate::sRenderCostWeight = mRenderCostWeight;
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401 | }
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402 |
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403 |
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404 | ViewCellsTree::ViewCellsTree():
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405 | mRoot(NULL),
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406 | mUseAreaForPvs(false),
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407 | mViewCellsManager(NULL),
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408 | #if 0
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409 | mViewCellsStorage(PVS_IN_INTERIORS)
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410 | #else
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411 | mViewCellsStorage(PVS_IN_LEAVES)
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412 | #endif
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413 | {
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414 | ReadEnvironment();
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415 | MergeCandidate::sRenderCostWeight = mRenderCostWeight;
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416 | }
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417 |
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418 |
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419 | void ViewCellsTree::ReadEnvironment()
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420 | {
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421 | Environment::GetSingleton()->GetBoolValue("ViewCells.Visualization.exportMergedViewCells", mExportMergedViewCells);
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422 | Environment::GetSingleton()->GetFloatValue("ViewCells.maxStaticMemory", mMaxMemory);
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423 |
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424 | //-- merge options
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425 | Environment::GetSingleton()->GetFloatValue("ViewCells.PostProcess.renderCostWeight", mRenderCostWeight);
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426 | Environment::GetSingleton()->GetIntValue("ViewCells.PostProcess.minViewCells", mMergeMinViewCells);
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427 | Environment::GetSingleton()->GetFloatValue("ViewCells.PostProcess.maxCostRatio", mMergeMaxCostRatio);
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428 | Environment::GetSingleton()->GetBoolValue("ViewCells.PostProcess.refine", mRefineViewCells);
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429 |
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430 | Environment::GetSingleton()->GetIntValue("ViewCells.PostProcess.maxMergesPerPass", mMaxMergesPerPass);
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431 | Environment::GetSingleton()->GetFloatValue("ViewCells.PostProcess.avgCostMaxDeviation", mAvgCostMaxDeviation);
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432 |
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433 | Debug << "============= view cell tree options ================\n";
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434 | Debug << "minimum view cells: " << mMergeMinViewCells << endl;
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435 | Debug << "max cost ratio: " << mMergeMaxCostRatio << endl;
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436 | Debug << "max memory: " << mMaxMemory << endl;
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437 | Debug << "refining view cells: " << mRefineViewCells << endl;
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438 | Debug << "=========== end view cell tree options ===============\n";
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439 | }
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440 |
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441 |
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442 | // return memory usage in MB
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443 | float ViewCellsTree::GetMemUsage() const
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444 | {
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445 | // TODO
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446 | return 0;
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447 | /*(sizeof(ViewCellsTree) +
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448 | mBspStats.Leaves() * sizeof(BspLeaf) +
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449 | mBspStats.Interior() * sizeof(BspInterior) +
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450 | mBspStats.accumRays * sizeof(RayInfo)) / (1024.0f * 1024.0f);*/
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451 | }
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452 |
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453 |
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454 | int ViewCellsTree::GetNumInitialViewCells(ViewCell *vc) const
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455 | {
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456 | int vcSize = 0;
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457 |
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458 | stack<ViewCell *> tstack;
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459 |
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460 | tstack.push(vc);
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461 |
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462 | while (!tstack.empty())
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463 | {
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464 | ViewCell *vc = tstack.top();
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465 | tstack.pop();
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466 |
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467 | if (vc->IsLeaf())
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468 | {
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469 | ++ vcSize;
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470 | }
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471 | else
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472 | {
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473 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
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474 |
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475 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
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476 |
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477 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
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478 | {
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479 | tstack.push(*it);
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480 | }
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481 |
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482 | }
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483 | }
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484 |
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485 | return vcSize;
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486 | }
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487 |
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488 |
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489 | void ViewCellsTree::CollectLeaves(ViewCell *vc, ViewCellContainer &leaves) const
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490 | {
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491 | stack<ViewCell *> tstack;
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492 |
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493 | tstack.push(vc);
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494 |
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495 | while (!tstack.empty())
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496 | {
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497 | ViewCell *vc = tstack.top();
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498 | tstack.pop();
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499 |
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500 | if (vc->IsLeaf())
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501 | {
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502 | leaves.push_back(vc);
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503 | }
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504 | else
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505 | {
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506 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
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507 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
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508 |
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509 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
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510 | {
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511 | tstack.push(*it);
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512 | }
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513 | }
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514 | }
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515 | }
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516 |
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517 |
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518 | ViewCellsTree::~ViewCellsTree()
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519 | {
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520 | DEL_PTR(mRoot);
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521 | }
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522 |
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523 |
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524 | int ViewCellsTree::ConstructMergeTree(const VssRayContainer &rays,
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525 | const ObjectContainer &objects)
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526 | {
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527 | mNumActiveViewCells = (int)mViewCellsManager->GetViewCells().size();
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528 |
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529 | float variance = 0;
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530 | float totalPvs = 0;
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531 | float totalRenderCost = 0;
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532 |
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533 | //////////////////
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534 | //-- compute statistics values of initial view cells
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535 |
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536 | mViewCellsManager->EvaluateRenderStatistics(totalRenderCost,
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537 | mExpectedCost,
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538 | mDeviation,
|
---|
539 | variance,
|
---|
540 | totalPvs,
|
---|
541 | mAvgRenderCost);
|
---|
542 |
|
---|
543 | /////////////
|
---|
544 | //-- fill merge queue
|
---|
545 | vector<MergeCandidate> candidates;
|
---|
546 |
|
---|
547 | mViewCellsManager->CollectMergeCandidates(rays, candidates);
|
---|
548 |
|
---|
549 | while(!candidates.empty())
|
---|
550 | {
|
---|
551 | MergeCandidate mc = candidates.back();
|
---|
552 | candidates.pop_back();
|
---|
553 | EvalMergeCost(mc);
|
---|
554 | mMergeQueue.push(mc);
|
---|
555 | }
|
---|
556 |
|
---|
557 | Debug << "************************* merge ***********************************" << endl;
|
---|
558 | Debug << "deviation: " << mDeviation << endl;
|
---|
559 | Debug << "avg render cost: " << mAvgRenderCost << endl;
|
---|
560 | Debug << "expected cost: " << mExpectedCost << endl;
|
---|
561 |
|
---|
562 |
|
---|
563 | ViewCellsManager::PvsStatistics pvsStats;
|
---|
564 | mViewCellsManager->GetPvsStatistics(pvsStats);
|
---|
565 |
|
---|
566 | //static float expectedValue = pvsStats.avgPvs;
|
---|
567 |
|
---|
568 | //-- the current view cells are kept in this container
|
---|
569 | //-- we start with the current view cells from the view cell manager.
|
---|
570 | //-- The active view cells will change with subsequent merges
|
---|
571 |
|
---|
572 | // todo: should rather take initial view cells
|
---|
573 | ViewCellContainer &activeViewCells = mViewCellsManager->GetViewCells();
|
---|
574 |
|
---|
575 |
|
---|
576 | ViewCell::NewMail();
|
---|
577 |
|
---|
578 | MergeStatistics mergeStats;
|
---|
579 | mergeStats.Start();
|
---|
580 |
|
---|
581 | long startTime = GetTime();
|
---|
582 |
|
---|
583 | mergeStats.collectTime = TimeDiff(startTime, GetTime());
|
---|
584 | mergeStats.candidates = (int)mMergeQueue.size();
|
---|
585 | startTime = GetTime();
|
---|
586 |
|
---|
587 | // frequency stats are updated
|
---|
588 | const int statsOut = 500;
|
---|
589 |
|
---|
590 | // passes are needed for statistics, because we don't want to record
|
---|
591 | // every merge
|
---|
592 | int pass = 0;
|
---|
593 | int mergedPerPass = 0;
|
---|
594 | float realExpectedCost = mExpectedCost;
|
---|
595 | float realAvgRenderCost = mAvgRenderCost;
|
---|
596 | int realNumActiveViewCells = mNumActiveViewCells;
|
---|
597 |
|
---|
598 | // maximal ratio of old expected render cost to expected render
|
---|
599 | // when the the render queue has to be reset.
|
---|
600 | int numMergedViewCells = 0;
|
---|
601 |
|
---|
602 |
|
---|
603 | cout << "actual merge starts now ... " << endl;
|
---|
604 |
|
---|
605 | //-- use priority queue to merge leaf pairs
|
---|
606 |
|
---|
607 | while (!mMergeQueue.empty())
|
---|
608 | {
|
---|
609 | //-- reset merge queue if the ratio of current expected cost / real expected cost
|
---|
610 | // too small or after a given number of merges
|
---|
611 | if ((mergedPerPass > mMaxMergesPerPass) ||
|
---|
612 | (mAvgCostMaxDeviation > mAvgRenderCost / realAvgRenderCost))
|
---|
613 | {
|
---|
614 | Debug << "************ reset queue *****************\n"
|
---|
615 | << "ratios: " << mAvgCostMaxDeviation
|
---|
616 | << " real avg render cost " << realAvgRenderCost << " average render cost " << mAvgRenderCost
|
---|
617 | << " merged per pass : " << mergedPerPass << " of maximal " << mMaxMergesPerPass << endl;
|
---|
618 |
|
---|
619 | Debug << "Values before reset: "
|
---|
620 | << " erc: " << mExpectedCost
|
---|
621 | << " avgrc: " << mAvgRenderCost
|
---|
622 | << " dev: " << mDeviation << endl;
|
---|
623 |
|
---|
624 | // adjust render cost
|
---|
625 | ++ pass;
|
---|
626 |
|
---|
627 | mergedPerPass = 0;
|
---|
628 | mExpectedCost = realExpectedCost;
|
---|
629 | mAvgRenderCost = realAvgRenderCost;
|
---|
630 | mNumActiveViewCells = realNumActiveViewCells;
|
---|
631 |
|
---|
632 | const int numMergedViewCells = UpdateActiveViewCells(activeViewCells);
|
---|
633 |
|
---|
634 | /////////////////
|
---|
635 | //-- reset / refine the view cells
|
---|
636 | //-- priorities are recomputed
|
---|
637 | //-- the candidates are put back into merge queue
|
---|
638 |
|
---|
639 | if (mRefineViewCells)
|
---|
640 | RefineViewCells(rays, objects);
|
---|
641 | else
|
---|
642 | ResetMergeQueue();
|
---|
643 |
|
---|
644 | Debug << "Values after reset: "
|
---|
645 | << " erc: " << mExpectedCost
|
---|
646 | << " avg: " << mAvgRenderCost
|
---|
647 | << " dev: " << mDeviation << endl;
|
---|
648 |
|
---|
649 | if (mExportMergedViewCells)
|
---|
650 | {
|
---|
651 | ExportMergedViewCells(activeViewCells, objects, numMergedViewCells);
|
---|
652 | }
|
---|
653 | }
|
---|
654 |
|
---|
655 |
|
---|
656 | MergeCandidate mc = mMergeQueue.top();
|
---|
657 | mMergeQueue.pop();
|
---|
658 |
|
---|
659 | // both view cells equal because of previous merges
|
---|
660 | // NOTE: do I really still need this? probably cannot happen!!
|
---|
661 | if (mc.mLeftViewCell == mc.mRightViewCell)
|
---|
662 | continue;
|
---|
663 |
|
---|
664 | if (mc.IsValid())
|
---|
665 | {
|
---|
666 | ViewCell::NewMail();
|
---|
667 |
|
---|
668 | //-- update statistical values
|
---|
669 | -- realNumActiveViewCells;
|
---|
670 | ++ mergeStats.merged;
|
---|
671 | ++ mergedPerPass;
|
---|
672 |
|
---|
673 | const float renderCostIncr = mc.GetRenderCost();
|
---|
674 | const float mergeCostIncr = mc.GetMergeCost();
|
---|
675 |
|
---|
676 | totalRenderCost += renderCostIncr;
|
---|
677 | mDeviation += mc.GetDeviationIncr();
|
---|
678 |
|
---|
679 |
|
---|
680 | //-- merge the view cells of leaf1 and leaf2
|
---|
681 | float pvsDiff;
|
---|
682 | ViewCellInterior *mergedVc =
|
---|
683 | MergeViewCells(mc.mLeftViewCell, mc.mRightViewCell, pvsDiff);
|
---|
684 |
|
---|
685 | // total render cost and deviation has changed
|
---|
686 | // real expected cost will be larger than expected cost used for the
|
---|
687 | // cost heuristics, but cannot recompute costs on each increase of the
|
---|
688 | // expected cost
|
---|
689 | totalPvs += pvsDiff;
|
---|
690 | realExpectedCost = totalRenderCost / (float)realNumActiveViewCells;
|
---|
691 | realAvgRenderCost = (float)totalPvs / (float)realNumActiveViewCells;
|
---|
692 |
|
---|
693 | // set merge cost to this node for priority traversal
|
---|
694 | mergedVc->SetMergeCost(totalRenderCost);
|
---|
695 |
|
---|
696 | // check if "siblings (back and front node of the same parent)
|
---|
697 | if (0) ++ mergeStats.siblings;
|
---|
698 |
|
---|
699 | // set the cost for rendering a view cell
|
---|
700 | mergedVc->SetCost(realExpectedCost);
|
---|
701 |
|
---|
702 | if ((mergeStats.merged % statsOut) == 0)
|
---|
703 | cout << "merged " << mergeStats.merged << " view cells" << endl;
|
---|
704 |
|
---|
705 | }
|
---|
706 | else
|
---|
707 | {
|
---|
708 | // merge candidate not valid, because one of the leaves was already
|
---|
709 | // merged with another one => validate and reinsert into queue
|
---|
710 | if (ValidateMergeCandidate(mc))
|
---|
711 | {
|
---|
712 | EvalMergeCost(mc);
|
---|
713 | mMergeQueue.push(mc);
|
---|
714 | }
|
---|
715 | }
|
---|
716 |
|
---|
717 | }
|
---|
718 |
|
---|
719 | // adjust stats and reset queue one final time
|
---|
720 | mExpectedCost = realExpectedCost;
|
---|
721 | mAvgRenderCost = realAvgRenderCost;
|
---|
722 | mNumActiveViewCells = realNumActiveViewCells;
|
---|
723 |
|
---|
724 | UpdateActiveViewCells(activeViewCells);
|
---|
725 |
|
---|
726 | // refine view cells and reset costs
|
---|
727 | if (mRefineViewCells)
|
---|
728 | RefineViewCells(rays, objects);
|
---|
729 | else
|
---|
730 | ResetMergeQueue();
|
---|
731 |
|
---|
732 |
|
---|
733 | // create a root node if the merge was not done till root level,
|
---|
734 | // else take the single node as new root
|
---|
735 | if ((int)activeViewCells.size() > 1)
|
---|
736 | {
|
---|
737 | Debug << "creating root of view cell hierarchy for "
|
---|
738 | << (int)activeViewCells.size() << " view cells" << endl;
|
---|
739 |
|
---|
740 | ViewCellInterior *root = mViewCellsManager->MergeViewCells(activeViewCells);
|
---|
741 |
|
---|
742 | ViewCellContainer::const_iterator it, it_end = root->mChildren.end();
|
---|
743 |
|
---|
744 | for (it = root->mChildren.begin(); it != it_end; ++ it)
|
---|
745 | (*it)->SetParent(root);
|
---|
746 |
|
---|
747 | root->SetMergeCost(totalRenderCost);
|
---|
748 | // $$JB keep this 0 temporarilly
|
---|
749 | root->SetCost(0.0f);
|
---|
750 |
|
---|
751 | mRoot = root;
|
---|
752 | }
|
---|
753 | // normal case
|
---|
754 | else if (!activeViewCells.empty())
|
---|
755 | {
|
---|
756 | Debug << "setting root of the merge history" << endl;
|
---|
757 | mRoot = activeViewCells[0];
|
---|
758 | }
|
---|
759 | else
|
---|
760 | {
|
---|
761 | Debug << "big error, root is NULL" << endl;
|
---|
762 | }
|
---|
763 |
|
---|
764 | //-- empty merge queue just in case
|
---|
765 | while (!mMergeQueue.empty())
|
---|
766 | {
|
---|
767 | mMergeQueue.pop();
|
---|
768 | }
|
---|
769 |
|
---|
770 | // test if computed volumes are correct
|
---|
771 | Debug << "volume of the root view cell: " << mRoot->GetVolume()
|
---|
772 | << " " << mViewCellsManager->GetViewSpaceBox().GetVolume() << endl;
|
---|
773 |
|
---|
774 | // TODO: delete because makes no sense here
|
---|
775 | mergeStats.expectedRenderCost = realExpectedCost;
|
---|
776 | mergeStats.deviation = mDeviation;
|
---|
777 |
|
---|
778 | // we want to optimize this heuristics
|
---|
779 | mergeStats.heuristics =
|
---|
780 | mDeviation * (1.0f - mRenderCostWeight) +
|
---|
781 | mExpectedCost * mRenderCostWeight;
|
---|
782 |
|
---|
783 | mergeStats.mergeTime = TimeDiff(startTime, GetTime());
|
---|
784 | mergeStats.Stop();
|
---|
785 | Debug << mergeStats << endl << endl;
|
---|
786 |
|
---|
787 | // assign colors for the view cells so that at least one is always consistent
|
---|
788 | AssignRandomColors();
|
---|
789 |
|
---|
790 | //TODO: should return sample contributions?
|
---|
791 | return mergeStats.merged;
|
---|
792 | }
|
---|
793 |
|
---|
794 |
|
---|
795 | ViewCell *ViewCellsTree::GetRoot() const
|
---|
796 | {
|
---|
797 | return mRoot;
|
---|
798 | }
|
---|
799 |
|
---|
800 |
|
---|
801 | void ViewCellsTree::ResetMergeQueue()
|
---|
802 | {
|
---|
803 | cout << "reset merge queue ... ";
|
---|
804 |
|
---|
805 | vector<MergeCandidate> buf;
|
---|
806 | buf.reserve(mMergeQueue.size());
|
---|
807 |
|
---|
808 |
|
---|
809 | // store merge candidates in intermediate buffer
|
---|
810 | while (!mMergeQueue.empty())
|
---|
811 | {
|
---|
812 | MergeCandidate mc = mMergeQueue.top();
|
---|
813 | mMergeQueue.pop();
|
---|
814 |
|
---|
815 | // recalculate cost
|
---|
816 | if (ValidateMergeCandidate(mc))
|
---|
817 | {
|
---|
818 | EvalMergeCost(mc);
|
---|
819 | buf.push_back(mc);
|
---|
820 | }
|
---|
821 | }
|
---|
822 |
|
---|
823 | vector<MergeCandidate>::const_iterator bit, bit_end = buf.end();
|
---|
824 |
|
---|
825 | // reinsert back into queue
|
---|
826 | for (bit = buf.begin(); bit != bit_end; ++ bit)
|
---|
827 | {
|
---|
828 | mMergeQueue.push(*bit);
|
---|
829 | }
|
---|
830 |
|
---|
831 | cout << "finished" << endl;
|
---|
832 | }
|
---|
833 |
|
---|
834 |
|
---|
835 | float ViewCellsTree::ComputeMergedPvsCost(const ObjectPvs &pvs1,
|
---|
836 | const ObjectPvs &pvs2) const
|
---|
837 | {
|
---|
838 | // computes render cost of merge
|
---|
839 | float renderCost = 0;
|
---|
840 |
|
---|
841 | // compute new pvs size
|
---|
842 | Intersectable::NewMail();
|
---|
843 |
|
---|
844 | ObjectPvsIterator pit = pvs1.GetIterator();
|
---|
845 |
|
---|
846 | // first mail all objects in first pvs
|
---|
847 | while (pit.HasMoreEntries())
|
---|
848 | {
|
---|
849 | ObjectPvsEntry entry = pit.Next();
|
---|
850 |
|
---|
851 | Intersectable *obj = entry.mObject;
|
---|
852 |
|
---|
853 | obj->Mail();
|
---|
854 | renderCost += mViewCellsManager->EvalRenderCost(obj);
|
---|
855 | }
|
---|
856 |
|
---|
857 | ObjectPvsIterator pit2 = pvs2.GetIterator();
|
---|
858 |
|
---|
859 | while (pit2.HasMoreEntries())
|
---|
860 | {
|
---|
861 | ObjectPvsEntry entry = pit2.Next();
|
---|
862 | Intersectable *obj = entry.mObject;
|
---|
863 |
|
---|
864 | // test if object already considered
|
---|
865 | if (!obj->Mailed())
|
---|
866 | {
|
---|
867 | renderCost += mViewCellsManager->EvalRenderCost(obj);
|
---|
868 | }
|
---|
869 | }
|
---|
870 |
|
---|
871 | return renderCost;
|
---|
872 | }
|
---|
873 |
|
---|
874 |
|
---|
875 | int ViewCellsTree::UpdateActiveViewCells(ViewCellContainer &viewCells)
|
---|
876 | {
|
---|
877 | int numMergedViewCells = 0;
|
---|
878 |
|
---|
879 | Debug << "updating active vc: " << (int)viewCells.size() << endl;
|
---|
880 |
|
---|
881 | // find all already merged view cells and remove them from the
|
---|
882 | // container view cells
|
---|
883 |
|
---|
884 | // sort out all view cells which are not active anymore, i.e., they
|
---|
885 | // were already part of a merge
|
---|
886 | int i = 0;
|
---|
887 |
|
---|
888 | ViewCell::NewMail();
|
---|
889 |
|
---|
890 | while (1)
|
---|
891 | {
|
---|
892 | // remove all merged view cells from end of the vector
|
---|
893 | while (!viewCells.empty() && (viewCells.back()->GetParent()))
|
---|
894 | {
|
---|
895 | viewCells.pop_back();
|
---|
896 | }
|
---|
897 |
|
---|
898 | // all merged view cells have been found
|
---|
899 | if (i >= (int)viewCells.size())
|
---|
900 | break;
|
---|
901 |
|
---|
902 | // already merged this view cell, put it to end of vector
|
---|
903 | if (viewCells[i]->GetParent())
|
---|
904 | swap(viewCells[i], viewCells.back());
|
---|
905 |
|
---|
906 | // mail view cell that it has not been merged
|
---|
907 | viewCells[i]->Mail();
|
---|
908 |
|
---|
909 | // increase loop counter
|
---|
910 | ++ i;
|
---|
911 | }
|
---|
912 |
|
---|
913 |
|
---|
914 | // add new view cells to container only if they don't have been
|
---|
915 | // merged in the mean time
|
---|
916 | ViewCellContainer::const_iterator ait, ait_end = mMergedViewCells.end();
|
---|
917 |
|
---|
918 | for (ait = mMergedViewCells.begin(); ait != ait_end; ++ ait)
|
---|
919 | {
|
---|
920 | ViewCell *vc = mMergedViewCells.back();
|
---|
921 | if (!vc->GetParent() && !vc->Mailed())
|
---|
922 | {
|
---|
923 | vc->Mail();
|
---|
924 | viewCells.push_back(vc);
|
---|
925 | ++ numMergedViewCells;
|
---|
926 | }
|
---|
927 | }
|
---|
928 |
|
---|
929 | // dispose old merged view cells
|
---|
930 | mMergedViewCells.clear();
|
---|
931 |
|
---|
932 | // update standard deviation
|
---|
933 | ViewCellContainer::const_iterator vit, vit_end = viewCells.end();
|
---|
934 |
|
---|
935 | mDeviation = 0;
|
---|
936 |
|
---|
937 | for (vit = viewCells.begin(); vit != vit_end; ++ vit)
|
---|
938 | {
|
---|
939 | const float lower = (float)mViewCellsManager->GetMinPvsSize();
|
---|
940 | const float upper = (float)mViewCellsManager->GetMaxPvsSize();
|
---|
941 |
|
---|
942 | const float penalty = EvalPvsPenalty((*vit)->GetPvs().EvalPvsCost(), lower, upper);
|
---|
943 |
|
---|
944 | mDeviation += fabs(mAvgRenderCost - penalty);
|
---|
945 | }
|
---|
946 |
|
---|
947 | mDeviation /= (float)viewCells.size();
|
---|
948 |
|
---|
949 | return numMergedViewCells;
|
---|
950 | }
|
---|
951 |
|
---|
952 |
|
---|
953 | void ViewCellsTree::ExportMergedViewCells(ViewCellContainer &viewCells,
|
---|
954 | const ObjectContainer &objects,
|
---|
955 | const int numMergedViewCells)
|
---|
956 | {
|
---|
957 |
|
---|
958 |
|
---|
959 | char s[64];
|
---|
960 |
|
---|
961 | sprintf(s, "merged_viewcells%07d.x3d", (int)viewCells.size());
|
---|
962 | Exporter *exporter = Exporter::GetExporter(s);
|
---|
963 |
|
---|
964 | if (exporter)
|
---|
965 | {
|
---|
966 | cout << "exporting " << (int)viewCells.size() << " merged view cells ... ";
|
---|
967 | exporter->ExportGeometry(objects);
|
---|
968 | //Debug << "vc size " << (int)viewCells.size() << " merge queue size: " << (int)mMergeQueue.size() << endl;
|
---|
969 | ViewCellContainer::const_iterator it, it_end = viewCells.end();
|
---|
970 |
|
---|
971 | int i = 0;
|
---|
972 | for (it = viewCells.begin(); it != it_end; ++ it)
|
---|
973 | {
|
---|
974 | Material m;
|
---|
975 | // assign special material to new view cells
|
---|
976 | // new view cells are on the back of container
|
---|
977 | if (i ++ >= (viewCells.size() - numMergedViewCells))
|
---|
978 | {
|
---|
979 | //m = RandomMaterial();
|
---|
980 | m.mDiffuseColor.r = RandomValue(0.5f, 1.0f);
|
---|
981 | m.mDiffuseColor.g = RandomValue(0.5f, 1.0f);
|
---|
982 | m.mDiffuseColor.b = RandomValue(0.5f, 1.0f);
|
---|
983 | }
|
---|
984 | else
|
---|
985 | {
|
---|
986 | float col = RandomValue(0.1f, 0.4f);
|
---|
987 | m.mDiffuseColor.r = col;
|
---|
988 | m.mDiffuseColor.g = col;
|
---|
989 | m.mDiffuseColor.b = col;
|
---|
990 | }
|
---|
991 |
|
---|
992 | exporter->SetForcedMaterial(m);
|
---|
993 | mViewCellsManager->ExportViewCellGeometry(exporter, *it, NULL, NULL);
|
---|
994 | }
|
---|
995 |
|
---|
996 | delete exporter;
|
---|
997 | cout << "finished" << endl;
|
---|
998 | }
|
---|
999 | }
|
---|
1000 |
|
---|
1001 |
|
---|
1002 | // TODO: should be done in view cells manager
|
---|
1003 | ViewCellInterior *ViewCellsTree::MergeViewCells(ViewCell *left,
|
---|
1004 | ViewCell *right,
|
---|
1005 | float &pvsDiff) //const
|
---|
1006 | {
|
---|
1007 | // create merged view cell
|
---|
1008 | ViewCellInterior *vc =
|
---|
1009 | mViewCellsManager->MergeViewCells(left, right);
|
---|
1010 |
|
---|
1011 | // if merge was unsuccessful
|
---|
1012 | if (!vc) return NULL;
|
---|
1013 |
|
---|
1014 | // set to the new parent view cell
|
---|
1015 | left->SetParent(vc);
|
---|
1016 | right->SetParent(vc);
|
---|
1017 |
|
---|
1018 |
|
---|
1019 | if (mUseAreaForPvs)
|
---|
1020 | {
|
---|
1021 | // set new area of view cell
|
---|
1022 | // not not correct, but costly to compute real area!!
|
---|
1023 | vc->SetArea(left->GetArea() + right->GetArea());
|
---|
1024 | }
|
---|
1025 | else
|
---|
1026 | { // set new volume of view cell
|
---|
1027 | vc->SetVolume(left->GetVolume() + right->GetVolume());
|
---|
1028 | }
|
---|
1029 |
|
---|
1030 |
|
---|
1031 | // important so other merge candidates sharing this view cell
|
---|
1032 | // are notified that the merge cost must be updated!!
|
---|
1033 | vc->Mail();
|
---|
1034 |
|
---|
1035 | const float pvs1 = left->GetPvs().EvalPvsCost();
|
---|
1036 | const float pvs2 = right->GetPvs().EvalPvsCost();
|
---|
1037 |
|
---|
1038 |
|
---|
1039 | // the new view cells are stored in this container
|
---|
1040 | mMergedViewCells.push_back(vc);
|
---|
1041 |
|
---|
1042 | pvsDiff = vc->GetPvs().EvalPvsCost() - pvs1 - pvs2;
|
---|
1043 |
|
---|
1044 |
|
---|
1045 | // don't store pvs in interior cells, just a scalar
|
---|
1046 | if (mViewCellsStorage == PVS_IN_LEAVES)
|
---|
1047 | {
|
---|
1048 | // set scalars
|
---|
1049 | mViewCellsManager->UpdateScalarPvsSize(left,
|
---|
1050 | left->GetPvs().EvalPvsCost(),
|
---|
1051 | left->GetPvs().GetSize());
|
---|
1052 |
|
---|
1053 | // remove pvs, we don't store interior pvss
|
---|
1054 | if (!left->IsLeaf())
|
---|
1055 | {
|
---|
1056 | left->GetPvs().Clear();
|
---|
1057 | }
|
---|
1058 |
|
---|
1059 | // set scalars
|
---|
1060 | mViewCellsManager->UpdateScalarPvsSize(right,
|
---|
1061 | right->GetPvs().EvalPvsCost(),
|
---|
1062 | right->GetPvs().GetSize());
|
---|
1063 |
|
---|
1064 | right->mPvsSizeValid = true;
|
---|
1065 |
|
---|
1066 | // remove pvs, we don't store interior pvss
|
---|
1067 | if (!right->IsLeaf())
|
---|
1068 | {
|
---|
1069 | right->GetPvs().Clear();
|
---|
1070 | }
|
---|
1071 | }
|
---|
1072 |
|
---|
1073 | return vc;
|
---|
1074 | }
|
---|
1075 |
|
---|
1076 |
|
---|
1077 | int ViewCellsTree::RefineViewCells(const VssRayContainer &rays,
|
---|
1078 | const ObjectContainer &objects)
|
---|
1079 | {
|
---|
1080 | Debug << "refining " << (int)mMergeQueue.size() << " candidates " << endl;
|
---|
1081 |
|
---|
1082 | // intermediate buffer for shuffled view cells
|
---|
1083 | vector<MergeCandidate> buf;
|
---|
1084 | buf.reserve(mMergeQueue.size());
|
---|
1085 |
|
---|
1086 | // Use priority queue of remaining leaf pairs
|
---|
1087 | // The candidates either share the same view cells or
|
---|
1088 | // are border leaves which share a boundary.
|
---|
1089 | // We test if they can be shuffled, i.e.,
|
---|
1090 | // either one leaf is made part of one view cell or the other
|
---|
1091 | // leaf is made part of the other view cell. It is tested if the
|
---|
1092 | // remaining view cells are "better" than the old ones.
|
---|
1093 |
|
---|
1094 | const int numPasses = 3;
|
---|
1095 | int pass = 0;
|
---|
1096 | int passShuffled = 0;
|
---|
1097 | int shuffled = 0;
|
---|
1098 | int shuffledViewCells = 0;
|
---|
1099 |
|
---|
1100 | ViewCell::NewMail();
|
---|
1101 |
|
---|
1102 | while (!mMergeQueue.empty())
|
---|
1103 | {
|
---|
1104 | MergeCandidate mc = mMergeQueue.top();
|
---|
1105 | mMergeQueue.pop();
|
---|
1106 |
|
---|
1107 | // both view cells equal or already shuffled
|
---|
1108 | if ((mc.GetLeftViewCell() == mc.GetRightViewCell()) ||
|
---|
1109 | mc.GetLeftViewCell()->IsLeaf() || mc.GetRightViewCell()->IsLeaf())
|
---|
1110 | {
|
---|
1111 | continue;
|
---|
1112 | }
|
---|
1113 |
|
---|
1114 | // candidate for shuffling
|
---|
1115 | const bool wasShuffled = ShuffleLeaves(mc);
|
---|
1116 |
|
---|
1117 | // shuffled or put into other queue for further refine
|
---|
1118 | if (wasShuffled)
|
---|
1119 | {
|
---|
1120 | ++ passShuffled;
|
---|
1121 |
|
---|
1122 | if (!mc.GetLeftViewCell()->Mailed())
|
---|
1123 | {
|
---|
1124 | mc.GetLeftViewCell()->Mail();
|
---|
1125 | ++ shuffledViewCells;
|
---|
1126 | }
|
---|
1127 | if (!mc.GetRightViewCell()->Mailed())
|
---|
1128 | {
|
---|
1129 | mc.GetRightViewCell()->Mail();
|
---|
1130 | ++ shuffledViewCells;
|
---|
1131 | }
|
---|
1132 | }
|
---|
1133 |
|
---|
1134 | // put back into intermediate vector
|
---|
1135 | buf.push_back(mc);
|
---|
1136 | }
|
---|
1137 |
|
---|
1138 |
|
---|
1139 | //-- in the end, the candidates must be in the mergequeue again
|
---|
1140 | // with the correct cost
|
---|
1141 |
|
---|
1142 | cout << "reset merge queue ... ";
|
---|
1143 |
|
---|
1144 |
|
---|
1145 | vector<MergeCandidate>::const_iterator bit, bit_end = buf.end();
|
---|
1146 |
|
---|
1147 | for (bit = buf.begin(); bit != bit_end; ++ bit)
|
---|
1148 | {
|
---|
1149 | MergeCandidate mc = *bit;
|
---|
1150 | // recalculate cost
|
---|
1151 | if (ValidateMergeCandidate(mc))
|
---|
1152 | {
|
---|
1153 | EvalMergeCost(mc);
|
---|
1154 | mMergeQueue.push(mc);
|
---|
1155 | }
|
---|
1156 | }
|
---|
1157 |
|
---|
1158 | cout << "finished" << endl;
|
---|
1159 |
|
---|
1160 | return shuffledViewCells;
|
---|
1161 | }
|
---|
1162 |
|
---|
1163 |
|
---|
1164 | inline int AddedPvsSize(ObjectPvs pvs1, const ObjectPvs &pvs2)
|
---|
1165 | {
|
---|
1166 | ObjectPvs interPvs;
|
---|
1167 | ObjectPvs::Merge(interPvs, pvs1, pvs2);
|
---|
1168 |
|
---|
1169 | return (int)interPvs.GetSize();
|
---|
1170 | }
|
---|
1171 |
|
---|
1172 |
|
---|
1173 | // recomputes pvs size minus pvs of leaf l
|
---|
1174 | #if 0
|
---|
1175 | inline int SubtractedPvsSize(BspViewCell *vc, BspLeaf *l, const ObjectPvs &pvs2)
|
---|
1176 | {
|
---|
1177 | ObjectPvs pvs;
|
---|
1178 | vector<BspLeaf *>::const_iterator it, it_end = vc->mLeaves.end();
|
---|
1179 | for (it = vc->mLeaves.begin(); it != vc->mLeaves.end(); ++ it)
|
---|
1180 | if (*it != l)
|
---|
1181 | pvs.AddPvs(*(*it)->mPvs);
|
---|
1182 | return pvs.GetSize();
|
---|
1183 | }
|
---|
1184 | #endif
|
---|
1185 |
|
---|
1186 |
|
---|
1187 | // computes pvs1 minus pvs2
|
---|
1188 | inline int SubtractedPvsSize(ObjectPvs pvs1, const ObjectPvs &pvs2)
|
---|
1189 | {
|
---|
1190 | return pvs1.SubtractPvs(pvs2);
|
---|
1191 | }
|
---|
1192 |
|
---|
1193 |
|
---|
1194 | float ViewCellsTree::EvalShuffleCost(ViewCell *leaf,
|
---|
1195 | ViewCellInterior *vc1,
|
---|
1196 | ViewCellInterior *vc2) const
|
---|
1197 | {
|
---|
1198 | //const int pvs1 = SubtractedPvsSize(vc1, leaf, *leaf->mPvs);
|
---|
1199 | const float pvs1 = (float)SubtractedPvsSize(vc1->GetPvs(), leaf->GetPvs());
|
---|
1200 | const float pvs2 = (float)AddedPvsSize(vc2->GetPvs(), leaf->GetPvs());
|
---|
1201 |
|
---|
1202 | const float lowerPvsLimit = (float)mViewCellsManager->GetMinPvsSize();
|
---|
1203 | const float upperPvsLimit = (float)mViewCellsManager->GetMaxPvsSize();
|
---|
1204 |
|
---|
1205 | const float pvsPenalty1 =
|
---|
1206 | EvalPvsPenalty(pvs1, lowerPvsLimit, upperPvsLimit);
|
---|
1207 |
|
---|
1208 | const float pvsPenalty2 =
|
---|
1209 | EvalPvsPenalty(pvs2, lowerPvsLimit, upperPvsLimit);
|
---|
1210 |
|
---|
1211 |
|
---|
1212 | // don't shuffle leaves with pvs > max
|
---|
1213 | if (0 && (pvs1 + pvs2 > mViewCellsManager->GetMaxPvsSize()))
|
---|
1214 | {
|
---|
1215 | return 1e20f;
|
---|
1216 | }
|
---|
1217 |
|
---|
1218 | float p1, p2;
|
---|
1219 |
|
---|
1220 | if (mUseAreaForPvs)
|
---|
1221 | {
|
---|
1222 | p1 = vc1->GetArea() - leaf->GetArea();
|
---|
1223 | p2 = vc2->GetArea() + leaf->GetArea();
|
---|
1224 | }
|
---|
1225 | else
|
---|
1226 | {
|
---|
1227 | p1 = vc1->GetVolume() - leaf->GetVolume();
|
---|
1228 | p2 = vc2->GetVolume() + leaf->GetVolume();
|
---|
1229 | }
|
---|
1230 |
|
---|
1231 | const float renderCost1 = pvsPenalty1 * p1;
|
---|
1232 | const float renderCost2 = pvsPenalty2 * p2;
|
---|
1233 |
|
---|
1234 | float dev1, dev2;
|
---|
1235 |
|
---|
1236 | if (1)
|
---|
1237 | {
|
---|
1238 | dev1 = fabs(mAvgRenderCost - pvsPenalty1);
|
---|
1239 | dev2 = fabs(mAvgRenderCost - pvsPenalty2);
|
---|
1240 | }
|
---|
1241 | else
|
---|
1242 | {
|
---|
1243 | dev1 = fabs(mExpectedCost - renderCost1);
|
---|
1244 | dev2 = fabs(mExpectedCost - renderCost2);
|
---|
1245 | }
|
---|
1246 |
|
---|
1247 | return mRenderCostWeight * (renderCost1 + renderCost2) +
|
---|
1248 | (1.0f - mRenderCostWeight) * (dev1 + dev2) / (float)mNumActiveViewCells;
|
---|
1249 | }
|
---|
1250 |
|
---|
1251 |
|
---|
1252 | void ViewCellsTree::ShuffleLeaf(ViewCell *leaf,
|
---|
1253 | ViewCellInterior *vc1,
|
---|
1254 | ViewCellInterior *vc2) const
|
---|
1255 | {
|
---|
1256 | // compute new pvs and area
|
---|
1257 | // TODO change
|
---|
1258 | vc1->GetPvs().SubtractPvs(leaf->GetPvs());
|
---|
1259 |
|
---|
1260 | ObjectPvs interPvs;
|
---|
1261 | ObjectPvs::Merge(interPvs, vc2->GetPvs(), leaf->GetPvs());
|
---|
1262 | vc2->SetPvs(interPvs);
|
---|
1263 |
|
---|
1264 | if (mUseAreaForPvs)
|
---|
1265 | {
|
---|
1266 | vc1->SetArea(vc1->GetArea() - leaf->GetArea());
|
---|
1267 | vc2->SetArea(vc2->GetArea() + leaf->GetArea());
|
---|
1268 | }
|
---|
1269 | else
|
---|
1270 | {
|
---|
1271 | vc1->SetVolume(vc1->GetVolume() - leaf->GetVolume());
|
---|
1272 | vc2->SetVolume(vc2->GetVolume() + leaf->GetVolume());
|
---|
1273 | }
|
---|
1274 |
|
---|
1275 |
|
---|
1276 | ViewCellInterior *p = dynamic_cast<ViewCellInterior *>(leaf->GetParent());
|
---|
1277 |
|
---|
1278 | p->RemoveChildLink(leaf);
|
---|
1279 | vc2->SetupChildLink(leaf);
|
---|
1280 | }
|
---|
1281 |
|
---|
1282 |
|
---|
1283 | bool ViewCellsTree::ShuffleLeaves(MergeCandidate &mc) const
|
---|
1284 | {
|
---|
1285 | float cost1, cost2;
|
---|
1286 |
|
---|
1287 | ViewCellInterior *vc1 = dynamic_cast<ViewCellInterior *>(mc.GetLeftViewCell());
|
---|
1288 | ViewCellInterior *vc2 = dynamic_cast<ViewCellInterior *>(mc.GetRightViewCell());
|
---|
1289 |
|
---|
1290 | ViewCell *leaf1 = mc.GetInitialLeftViewCell();
|
---|
1291 | ViewCell *leaf2 = mc.GetInitialRightViewCell();
|
---|
1292 |
|
---|
1293 | //-- first test if shuffling would decrease cost
|
---|
1294 | cost1 = GetCostHeuristics(vc1);
|
---|
1295 | cost2 = GetCostHeuristics(vc2);
|
---|
1296 |
|
---|
1297 | const float oldCost = cost1 + cost2;
|
---|
1298 |
|
---|
1299 | float shuffledCost1 = Limits::Infinity;
|
---|
1300 | float shuffledCost2 = Limits::Infinity;
|
---|
1301 |
|
---|
1302 | if (leaf1)
|
---|
1303 | shuffledCost1 = EvalShuffleCost(leaf1, vc1, vc2);
|
---|
1304 | if (leaf2)
|
---|
1305 | shuffledCost2 = EvalShuffleCost(leaf2, vc2, vc1);
|
---|
1306 |
|
---|
1307 | // if cost of shuffle is less than old cost => shuffle
|
---|
1308 | if ((oldCost <= shuffledCost1) && (oldCost <= shuffledCost2))
|
---|
1309 | return false;
|
---|
1310 |
|
---|
1311 | if (shuffledCost1 < shuffledCost2)
|
---|
1312 | {
|
---|
1313 | if (leaf1)
|
---|
1314 | ShuffleLeaf(leaf1, vc1, vc2);
|
---|
1315 | mc.mInitialLeftViewCell = NULL;
|
---|
1316 | }
|
---|
1317 | else
|
---|
1318 | {
|
---|
1319 | if (leaf2)
|
---|
1320 | ShuffleLeaf(leaf2, vc2, vc1);
|
---|
1321 | mc.mInitialRightViewCell = NULL;
|
---|
1322 | }
|
---|
1323 |
|
---|
1324 | return true;
|
---|
1325 | }
|
---|
1326 |
|
---|
1327 |
|
---|
1328 | float ViewCellsTree::GetVariance(ViewCell *vc) const
|
---|
1329 | {
|
---|
1330 | const float upper = (float)mViewCellsManager->GetMaxPvsSize();
|
---|
1331 | const float lower = (float)mViewCellsManager->GetMinPvsSize();
|
---|
1332 |
|
---|
1333 | if (1)
|
---|
1334 | {
|
---|
1335 | const float penalty =
|
---|
1336 | EvalPvsPenalty(GetPvsCost(vc), lower, upper);
|
---|
1337 |
|
---|
1338 | return (mAvgRenderCost - penalty) * (mAvgRenderCost - penalty) /
|
---|
1339 | (float)mNumActiveViewCells;
|
---|
1340 | }
|
---|
1341 |
|
---|
1342 | const float leafCost = GetRenderCost(vc);
|
---|
1343 | return (mExpectedCost - leafCost) * (mExpectedCost - leafCost);
|
---|
1344 | }
|
---|
1345 |
|
---|
1346 |
|
---|
1347 | float ViewCellsTree::GetDeviation(ViewCell *vc) const
|
---|
1348 | {
|
---|
1349 | const float upper = (float)mViewCellsManager->GetMaxPvsSize();
|
---|
1350 | const float lower = (float)mViewCellsManager->GetMinPvsSize();
|
---|
1351 |
|
---|
1352 | if (1)
|
---|
1353 | {
|
---|
1354 | const float penalty = EvalPvsPenalty(GetPvsCost(vc), lower, upper);
|
---|
1355 | return fabs(mAvgRenderCost - penalty) / (float)mNumActiveViewCells;
|
---|
1356 | }
|
---|
1357 |
|
---|
1358 | const float renderCost = GetRenderCost(vc);
|
---|
1359 | return fabs(mExpectedCost - renderCost);
|
---|
1360 | }
|
---|
1361 |
|
---|
1362 |
|
---|
1363 | float ViewCellsTree::GetRenderCost(ViewCell *vc) const
|
---|
1364 | {
|
---|
1365 | if (mUseAreaForPvs)
|
---|
1366 | {
|
---|
1367 | return vc->GetPvs().EvalPvsCost() * vc->GetArea();
|
---|
1368 | }
|
---|
1369 |
|
---|
1370 | return vc->GetPvs().EvalPvsCost() * vc->GetVolume();
|
---|
1371 | }
|
---|
1372 |
|
---|
1373 |
|
---|
1374 | float ViewCellsTree::GetCostHeuristics(ViewCell *vc) const
|
---|
1375 | {
|
---|
1376 | return GetRenderCost(vc) * mRenderCostWeight +
|
---|
1377 | GetDeviation(vc) * (1.0f - mRenderCostWeight);
|
---|
1378 | }
|
---|
1379 |
|
---|
1380 |
|
---|
1381 | bool ViewCellsTree::ValidateMergeCandidate(MergeCandidate &mc) const
|
---|
1382 | {
|
---|
1383 | // propagate up so we have only the active view cells
|
---|
1384 | while (mc.mLeftViewCell->mParent)
|
---|
1385 | {
|
---|
1386 | mc.mLeftViewCell = mc.mLeftViewCell->mParent;
|
---|
1387 | }
|
---|
1388 |
|
---|
1389 | while (mc.mRightViewCell->mParent)
|
---|
1390 | {
|
---|
1391 | mc.mRightViewCell = mc.mRightViewCell->mParent;
|
---|
1392 | }
|
---|
1393 |
|
---|
1394 | // this view cell was already merged
|
---|
1395 | //return mc.mLeftViewCell && (mc.mLeftViewCell != mc.mRightViewCell);
|
---|
1396 | return mc.mLeftViewCell != mc.mRightViewCell;
|
---|
1397 | }
|
---|
1398 |
|
---|
1399 |
|
---|
1400 | void ViewCellsTree::EvalMergeCost(MergeCandidate &mc) const
|
---|
1401 | {
|
---|
1402 | ///////////////////
|
---|
1403 | //-- compute pvs difference
|
---|
1404 |
|
---|
1405 | float newPvs;
|
---|
1406 |
|
---|
1407 | // not valid if not using const cost per object!!
|
---|
1408 | newPvs = ComputeMergedPvsCost(mc.mLeftViewCell->GetPvs(), mc.mRightViewCell->GetPvs());
|
---|
1409 |
|
---|
1410 |
|
---|
1411 | const float newPenalty = EvalPvsPenalty(newPvs,
|
---|
1412 | (float)mViewCellsManager->GetMinPvsSize(),
|
---|
1413 | (float)mViewCellsManager->GetMaxPvsSize());
|
---|
1414 |
|
---|
1415 | ViewCell *vc1 = mc.mLeftViewCell;
|
---|
1416 | ViewCell *vc2 = mc.mRightViewCell;
|
---|
1417 |
|
---|
1418 | //-- compute ratio of old cost
|
---|
1419 | //-- (i.e., added size of left and right view cell times pvs size)
|
---|
1420 | //-- to new rendering cost (i.e, size of merged view cell times pvs size)
|
---|
1421 | const float oldCost = GetRenderCost(vc1) + GetRenderCost(vc2);
|
---|
1422 |
|
---|
1423 | const float newCost = mUseAreaForPvs ?
|
---|
1424 | (float)newPenalty * (vc1->GetArea() + vc2->GetArea()) :
|
---|
1425 | (float)newPenalty * (vc1->GetVolume() + vc2->GetVolume());
|
---|
1426 |
|
---|
1427 |
|
---|
1428 | // strong penalty if pvs size too large
|
---|
1429 | if (0 && (newPvs > mViewCellsManager->GetMaxPvsSize()))
|
---|
1430 | {
|
---|
1431 | mc.mRenderCost = 1e20f;
|
---|
1432 | }
|
---|
1433 | else
|
---|
1434 | {
|
---|
1435 | mc.mRenderCost = (newCost - oldCost) /
|
---|
1436 | mViewCellsManager->GetViewSpaceBox().GetVolume();
|
---|
1437 | }
|
---|
1438 |
|
---|
1439 | ///////////////////////////
|
---|
1440 | //-- merge cost also takes deviation into account
|
---|
1441 |
|
---|
1442 | float newDev, oldDev;
|
---|
1443 |
|
---|
1444 | if (1)
|
---|
1445 | newDev = fabs(mAvgRenderCost - newPenalty) / (float)mNumActiveViewCells;
|
---|
1446 | else
|
---|
1447 | newDev = fabs(mExpectedCost - newCost) / (float)mNumActiveViewCells;
|
---|
1448 |
|
---|
1449 | oldDev = GetDeviation(vc1) + GetDeviation(vc2);
|
---|
1450 |
|
---|
1451 | // compute deviation increase
|
---|
1452 | mc.mDeviationIncr = newDev - oldDev;
|
---|
1453 |
|
---|
1454 | //Debug << "render cost: " << mc.mRenderCost * mRenderCostWeight << endl;
|
---|
1455 | //Debug << "standard deviation: " << mc.mDeviationIncr * mRenderCostWeight << endl;
|
---|
1456 | }
|
---|
1457 |
|
---|
1458 |
|
---|
1459 | void ViewCellsTree::SetViewCellsStorage(int stype)
|
---|
1460 | {
|
---|
1461 | if (mViewCellsStorage == stype)
|
---|
1462 | return;
|
---|
1463 |
|
---|
1464 | // TODO
|
---|
1465 | switch (stype)
|
---|
1466 | {
|
---|
1467 | case COMPRESSED:
|
---|
1468 | CompressViewCellsPvs(mRoot);
|
---|
1469 | break;
|
---|
1470 | default:
|
---|
1471 | break;
|
---|
1472 | }
|
---|
1473 |
|
---|
1474 | mViewCellsStorage = stype;
|
---|
1475 | }
|
---|
1476 |
|
---|
1477 |
|
---|
1478 | void ViewCellsTree::CompressViewCellsPvs(ViewCell *root)
|
---|
1479 | {
|
---|
1480 | if (!root->IsLeaf())
|
---|
1481 | {
|
---|
1482 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(root);
|
---|
1483 |
|
---|
1484 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
1485 |
|
---|
1486 | // compress child sets first
|
---|
1487 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1488 | {
|
---|
1489 | CompressViewCellsPvs(*it);
|
---|
1490 | }
|
---|
1491 |
|
---|
1492 | /*cout << "***************\nbefore pulling up:\n";
|
---|
1493 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1494 | {
|
---|
1495 | cout << "vc:\n" << (*it)->GetPvs() << endl;
|
---|
1496 | }*/
|
---|
1497 |
|
---|
1498 | // compress root node
|
---|
1499 | PullUpVisibility(interior);
|
---|
1500 |
|
---|
1501 | /*cout << "after pulling up:\n";
|
---|
1502 | cout << "interior:\n" << interior->GetPvs() << endl;
|
---|
1503 |
|
---|
1504 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1505 | {
|
---|
1506 | cout << "vc:\n" << (*it)->GetPvs() << endl;
|
---|
1507 | }*/
|
---|
1508 | }
|
---|
1509 | }
|
---|
1510 |
|
---|
1511 |
|
---|
1512 | void ViewCellsTree::UpdateStats(ofstream &stats,
|
---|
1513 | const ViewCellsTreeStats &vcStats)
|
---|
1514 | {
|
---|
1515 | stats << "#Pass\n" << vcStats.mPass << endl
|
---|
1516 | << "#Splits\n" << vcStats.mNumViewCells << endl
|
---|
1517 | << "#RenderCostDecrease\n" << vcStats.mRenderCostDecrease << endl // TODO
|
---|
1518 | << "#TotalRenderCost\n" << vcStats.mTotalRenderCost << endl
|
---|
1519 | << "#CurrentPvs\n" << vcStats.mCurrentPvsCost << endl
|
---|
1520 | << "#ExpectedCost\n" << vcStats.mExpectedCost << endl
|
---|
1521 | << "#AvgRenderCost\n" << vcStats.mAvgRenderCost << endl
|
---|
1522 | << "#Deviation\n" << vcStats.mDeviation << endl
|
---|
1523 | << "#TotalPvs\n" << vcStats.mTotalPvsCost << endl
|
---|
1524 | << "#TotalEntriesInPvs\n" << vcStats.mEntriesInPvs << endl
|
---|
1525 | << "#Memory\n" << vcStats.mMemoryCost << endl
|
---|
1526 | << "#PvsSizeDecrease\n" << vcStats.mPvsSizeDecr << endl
|
---|
1527 | << "#Volume\n" << vcStats.mVolume << endl
|
---|
1528 | << endl;
|
---|
1529 | }
|
---|
1530 |
|
---|
1531 |
|
---|
1532 | void ViewCellsTree::ExportStats(const string &mergeStats)
|
---|
1533 | {
|
---|
1534 | TraversalQueue tqueue;
|
---|
1535 | tqueue.push(mRoot);
|
---|
1536 |
|
---|
1537 | ViewCellsTreeStats vcStats;
|
---|
1538 | vcStats.Reset();
|
---|
1539 |
|
---|
1540 | //cout << "exporting stats ... " << endl;
|
---|
1541 | vcStats.mNumViewCells = 1;
|
---|
1542 |
|
---|
1543 | const AxisAlignedBox3 box = mViewCellsManager->GetViewSpaceBox();
|
---|
1544 | const float vol = box.GetVolume();
|
---|
1545 |
|
---|
1546 | const float rootPvs = GetPvsCost(mRoot);
|
---|
1547 | const int rootEntries = GetPvsEntries(mRoot);
|
---|
1548 |
|
---|
1549 | vcStats.mTotalPvsCost = rootPvs;
|
---|
1550 | vcStats.mTotalRenderCost = rootPvs;
|
---|
1551 | vcStats.mAvgRenderCost = rootPvs;
|
---|
1552 | vcStats.mExpectedCost = rootPvs;
|
---|
1553 |
|
---|
1554 | vcStats.mEntriesInPvs = rootEntries;
|
---|
1555 |
|
---|
1556 | ofstream stats;
|
---|
1557 | stats.open(mergeStats.c_str());
|
---|
1558 |
|
---|
1559 | vcStats.mMemoryCost = (float)vcStats.mEntriesInPvs * ObjectPvs::GetEntrySize();
|
---|
1560 |
|
---|
1561 | /////////////
|
---|
1562 | //-- first view cell
|
---|
1563 |
|
---|
1564 | UpdateStats(stats, vcStats);
|
---|
1565 |
|
---|
1566 |
|
---|
1567 | //-- go through tree in the order of render cost decrease
|
---|
1568 | //-- which is the same order as the view cells were merged
|
---|
1569 | //-- or the reverse order of subdivision for subdivision-only
|
---|
1570 | //-- view cell hierarchies.
|
---|
1571 |
|
---|
1572 | while (!tqueue.empty())
|
---|
1573 | {
|
---|
1574 | ViewCell *vc = tqueue.top();
|
---|
1575 | tqueue.pop();
|
---|
1576 |
|
---|
1577 | if (!vc->IsLeaf())
|
---|
1578 | {
|
---|
1579 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
1580 |
|
---|
1581 | const float parentCost = GetPvsCost(interior);
|
---|
1582 | const int parentPvsEntries = GetPvsEntries(interior);
|
---|
1583 | const float parentExpCost = (float)parentCost * interior->GetVolume();
|
---|
1584 |
|
---|
1585 | float childExpCost = 0;
|
---|
1586 | float childCost = 0;
|
---|
1587 | int childPvsEntries = 0;
|
---|
1588 |
|
---|
1589 | -- vcStats.mNumViewCells;
|
---|
1590 |
|
---|
1591 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
1592 |
|
---|
1593 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1594 | {
|
---|
1595 | ViewCell *vc = *it;
|
---|
1596 |
|
---|
1597 | const float pvsCost = GetPvsCost(vc);
|
---|
1598 | const int pvsEntries = GetPvsEntries(vc);
|
---|
1599 |
|
---|
1600 | childExpCost += childCost * vc->GetVolume();
|
---|
1601 | childCost += pvsCost;
|
---|
1602 | childPvsEntries += pvsEntries;
|
---|
1603 |
|
---|
1604 | tqueue.push(vc);
|
---|
1605 | ++ vcStats.mNumViewCells;
|
---|
1606 | }
|
---|
1607 |
|
---|
1608 | // update stats for this view cell
|
---|
1609 | const float costDecr = (parentExpCost - childExpCost) / vol;
|
---|
1610 |
|
---|
1611 | vcStats.mTotalRenderCost -= costDecr;
|
---|
1612 | vcStats.mTotalPvsCost += childCost - parentCost;
|
---|
1613 | vcStats.mEntriesInPvs += childPvsEntries - parentPvsEntries;
|
---|
1614 |
|
---|
1615 | vcStats.mExpectedCost = vcStats.mTotalRenderCost / (float)vcStats.mNumViewCells;
|
---|
1616 | vcStats.mAvgRenderCost = vcStats.mTotalPvsCost / (float)vcStats.mNumViewCells;
|
---|
1617 |
|
---|
1618 | vcStats.mMemoryCost = vcStats.mEntriesInPvs * ObjectPvs::GetEntrySize();
|
---|
1619 |
|
---|
1620 | UpdateStats(stats, vcStats);
|
---|
1621 | }
|
---|
1622 | }
|
---|
1623 |
|
---|
1624 | stats.close();
|
---|
1625 | }
|
---|
1626 |
|
---|
1627 |
|
---|
1628 | void ViewCellsTree::SetRoot(ViewCell *root)
|
---|
1629 | {
|
---|
1630 | mRoot = root;
|
---|
1631 | }
|
---|
1632 |
|
---|
1633 |
|
---|
1634 | void ViewCellsTree::CollectBestViewCellSet(ViewCellContainer &viewCells,
|
---|
1635 | const int numViewCells)
|
---|
1636 | {
|
---|
1637 | TraversalQueue tqueue;
|
---|
1638 | tqueue.push(mRoot);
|
---|
1639 |
|
---|
1640 | while (!tqueue.empty())
|
---|
1641 | {
|
---|
1642 | ViewCell *vc = tqueue.top();
|
---|
1643 | tqueue.pop();
|
---|
1644 |
|
---|
1645 | // save the view cells if it is a leaf or if enough view cells have already been traversed
|
---|
1646 | // because of the priority queue, this will be the optimal set of v
|
---|
1647 | if (vc->IsLeaf() || ((viewCells.size() + tqueue.size() + 1) >= numViewCells))
|
---|
1648 | {
|
---|
1649 | viewCells.push_back(vc);
|
---|
1650 | }
|
---|
1651 | else
|
---|
1652 | {
|
---|
1653 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
1654 |
|
---|
1655 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
1656 |
|
---|
1657 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1658 | {
|
---|
1659 | tqueue.push(*it);
|
---|
1660 | }
|
---|
1661 | }
|
---|
1662 | }
|
---|
1663 | }
|
---|
1664 |
|
---|
1665 |
|
---|
1666 | void ViewCellsTree::PullUpVisibility(ViewCellInterior *interior)
|
---|
1667 | {
|
---|
1668 | const int mail = (int)interior->mChildren.size();
|
---|
1669 | Intersectable::NewMail(mail);
|
---|
1670 |
|
---|
1671 | ViewCellContainer::const_iterator cit, cit_end = interior->mChildren.end();
|
---|
1672 |
|
---|
1673 | // mail all objects in the leaf sets
|
---|
1674 | // we are interested in the objects which are present in all leaves
|
---|
1675 | // => count how often an object is part of a child set
|
---|
1676 | for (cit = interior->mChildren.begin(); cit != cit_end; ++ cit)
|
---|
1677 | {
|
---|
1678 | ViewCell *vc = *cit;
|
---|
1679 | ObjectPvsIterator pit = vc->GetPvs().GetIterator();
|
---|
1680 |
|
---|
1681 | while (pit.HasMoreEntries())
|
---|
1682 | {
|
---|
1683 | const ObjectPvsEntry &entry = pit.Next();
|
---|
1684 | Intersectable *obj = entry.mObject;
|
---|
1685 | obj->Mail();
|
---|
1686 | }
|
---|
1687 | }
|
---|
1688 |
|
---|
1689 | for (cit = interior->mChildren.begin(); cit != cit_end; ++ cit)
|
---|
1690 | {
|
---|
1691 | ViewCell *vc = *cit;
|
---|
1692 |
|
---|
1693 | ObjectPvsIterator pit = vc->GetPvs().GetIterator();
|
---|
1694 |
|
---|
1695 | while (pit.HasMoreEntries())
|
---|
1696 | {
|
---|
1697 | const ObjectPvsEntry &entry = pit.Next();
|
---|
1698 | Intersectable *obj = entry.mObject;
|
---|
1699 |
|
---|
1700 | obj->IncMail();
|
---|
1701 | }
|
---|
1702 | }
|
---|
1703 |
|
---|
1704 | // reset pvs
|
---|
1705 | interior->GetPvs().Clear(false);
|
---|
1706 |
|
---|
1707 | // only the objects which are present in all leaf pvs
|
---|
1708 | // should remain in the parent pvs
|
---|
1709 | // these are the objects which have been mailed in all children
|
---|
1710 | for (cit = interior->mChildren.begin(); cit != cit_end; ++ cit)
|
---|
1711 | {
|
---|
1712 | ViewCell *vc = *cit;
|
---|
1713 |
|
---|
1714 | ObjectPvsIterator pit = vc->GetPvs().GetIterator();
|
---|
1715 |
|
---|
1716 | while (pit.HasMoreEntries())
|
---|
1717 | {
|
---|
1718 | ObjectPvsEntry entry = pit.Next();
|
---|
1719 |
|
---|
1720 | if (entry.mObject->Mailed(mail))
|
---|
1721 | {
|
---|
1722 | interior->GetPvs().AddSample(entry.mObject, entry.mData.mSumPdf);
|
---|
1723 | }
|
---|
1724 | }
|
---|
1725 | }
|
---|
1726 |
|
---|
1727 | // delete entries which are pulled up
|
---|
1728 | // note: could be inefficent, rather gather unmailed pvs and reassign
|
---|
1729 | for (cit = interior->mChildren.begin(); cit != cit_end; ++ cit)
|
---|
1730 | {
|
---|
1731 | ViewCell *vc = *cit;
|
---|
1732 | ObjectPvsIterator pit = vc->GetPvs().GetIterator();
|
---|
1733 |
|
---|
1734 | ObjectPvs newPvs;
|
---|
1735 |
|
---|
1736 | while (pit.HasMoreEntries())
|
---|
1737 | {
|
---|
1738 | const ObjectPvsEntry &entry = pit.Next();
|
---|
1739 | Intersectable *obj = entry.mObject;
|
---|
1740 |
|
---|
1741 | /*if (obj->Mailed(mail))
|
---|
1742 | {
|
---|
1743 | vc->GetPvs().RemoveSample(entry.mObject, Limits::Infinity))
|
---|
1744 | }*/
|
---|
1745 | if (!obj->Mailed(mail))
|
---|
1746 | {
|
---|
1747 | newPvs.AddSampleDirty(obj, entry.mData.mSumPdf);
|
---|
1748 | }
|
---|
1749 | }
|
---|
1750 |
|
---|
1751 | vc->SetPvs(newPvs);
|
---|
1752 | }
|
---|
1753 | }
|
---|
1754 |
|
---|
1755 |
|
---|
1756 | // TODO matt: implement this function for different storing methods
|
---|
1757 | void ViewCellsTree::GetPvs(ViewCell *vc, ObjectPvs &pvs) const
|
---|
1758 | {
|
---|
1759 | // pvs is stored in each cell => just return pvs
|
---|
1760 | if (mViewCellsStorage == PVS_IN_INTERIORS)
|
---|
1761 | {
|
---|
1762 | pvs = vc->GetPvs();
|
---|
1763 | return;
|
---|
1764 | }
|
---|
1765 |
|
---|
1766 | ////////////////
|
---|
1767 | //-- pvs is not stored with the interiors => reconstruct
|
---|
1768 | ViewCell *root = vc;
|
---|
1769 |
|
---|
1770 | // add pvs from this view cell to root
|
---|
1771 | while (root->GetParent())
|
---|
1772 | {
|
---|
1773 | root = root->GetParent();
|
---|
1774 | pvs.MergeInPlace(root->GetPvs());
|
---|
1775 | }
|
---|
1776 |
|
---|
1777 | // add pvs from leaves
|
---|
1778 | stack<ViewCell *> tstack;
|
---|
1779 | tstack.push(vc);
|
---|
1780 |
|
---|
1781 | while (!tstack.empty())
|
---|
1782 | {
|
---|
1783 | vc = tstack.top();
|
---|
1784 | tstack.pop();
|
---|
1785 |
|
---|
1786 | // add newly found pvs to merged pvs
|
---|
1787 | pvs.MergeInPlace(vc->GetPvs());
|
---|
1788 |
|
---|
1789 | if (!vc->IsLeaf()) // interior cells: go down to leaf level
|
---|
1790 | {
|
---|
1791 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
1792 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
1793 |
|
---|
1794 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1795 | {
|
---|
1796 | tstack.push(*it);
|
---|
1797 | }
|
---|
1798 | }
|
---|
1799 | }
|
---|
1800 | }
|
---|
1801 |
|
---|
1802 |
|
---|
1803 | float ViewCellsTree::GetPvsCostForLeafStorage(ViewCell *vc) const
|
---|
1804 | {
|
---|
1805 | // pvs is always stored directly in leaves
|
---|
1806 | if (vc->IsLeaf())
|
---|
1807 | {
|
---|
1808 | return vc->GetPvs().EvalPvsCost();
|
---|
1809 | }
|
---|
1810 |
|
---|
1811 | // interior nodes: pvs is either stored as a
|
---|
1812 | // scalar or has to be reconstructed from the leaves
|
---|
1813 | // the stored pvs size is the valid pvs size => just return scalar
|
---|
1814 | if (vc->mPvsSizeValid)
|
---|
1815 | {
|
---|
1816 | return vc->mPvsCost;
|
---|
1817 | }
|
---|
1818 |
|
---|
1819 | // if no valid pvs size stored as a scalar =>
|
---|
1820 | // compute current pvs size of interior from it's leaf nodes
|
---|
1821 | ViewCellContainer leaves;
|
---|
1822 | CollectLeaves(vc, leaves);
|
---|
1823 |
|
---|
1824 | ViewCellContainer::const_iterator it, it_end = leaves.end();
|
---|
1825 |
|
---|
1826 | ObjectPvs newPvs;
|
---|
1827 |
|
---|
1828 | // sum up uniquely found intersectables
|
---|
1829 | for (it = leaves.begin(); it != it_end; ++ it)
|
---|
1830 | {
|
---|
1831 | newPvs.MergeInPlace((*it)->GetPvs());
|
---|
1832 | }
|
---|
1833 |
|
---|
1834 | return newPvs.EvalPvsCost();
|
---|
1835 | }
|
---|
1836 |
|
---|
1837 |
|
---|
1838 | int ViewCellsTree::GetEntriesInPvsForLeafStorage(ViewCell *vc) const
|
---|
1839 | {
|
---|
1840 | // pvs is always stored directly in leaves
|
---|
1841 | if (vc->IsLeaf())
|
---|
1842 | {
|
---|
1843 | return vc->GetPvs().GetSize();
|
---|
1844 | }
|
---|
1845 |
|
---|
1846 | // interior node
|
---|
1847 |
|
---|
1848 | // interior nodes: pvs is either stored as a scalar or
|
---|
1849 | // has to be reconstructed from the leaves
|
---|
1850 |
|
---|
1851 | // the stored pvs size is the valid pvs size => just return scalar
|
---|
1852 | if (vc->mPvsSizeValid)
|
---|
1853 | {
|
---|
1854 | return vc->mEntriesInPvs;
|
---|
1855 | }
|
---|
1856 |
|
---|
1857 | int pvsSize = 0;
|
---|
1858 |
|
---|
1859 | // if no valid pvs size stored as a scalar =>
|
---|
1860 | // compute current pvs size of interior from it's leaf nodes
|
---|
1861 | ViewCellContainer leaves;
|
---|
1862 | CollectLeaves(vc, leaves);
|
---|
1863 |
|
---|
1864 | ViewCellContainer::const_iterator it, it_end = leaves.end();
|
---|
1865 | Intersectable::NewMail();
|
---|
1866 |
|
---|
1867 | // sum different intersectables
|
---|
1868 | for (it = leaves.begin(); it != it_end; ++ it)
|
---|
1869 | {
|
---|
1870 | ObjectPvsIterator oit = (*it)->GetPvs().GetIterator();
|
---|
1871 |
|
---|
1872 | while (oit.HasMoreEntries())
|
---|
1873 | {
|
---|
1874 | ObjectPvsEntry entry = oit.Next();
|
---|
1875 | Intersectable *intersect = entry.mObject;
|
---|
1876 |
|
---|
1877 | if (!intersect->Mailed())
|
---|
1878 | {
|
---|
1879 | intersect->Mail();
|
---|
1880 | ++ pvsSize;
|
---|
1881 | }
|
---|
1882 | }
|
---|
1883 | }
|
---|
1884 |
|
---|
1885 | return pvsSize;
|
---|
1886 | }
|
---|
1887 |
|
---|
1888 |
|
---|
1889 | float ViewCellsTree::GetPvsCostForCompressedStorage(ViewCell *vc) const
|
---|
1890 | {
|
---|
1891 | float pvsCost = 0;
|
---|
1892 |
|
---|
1893 | /////////////
|
---|
1894 | //-- compressed pvs
|
---|
1895 |
|
---|
1896 | // the stored pvs size is the valid pvs size => just return scalar
|
---|
1897 | if (vc->mPvsSizeValid)
|
---|
1898 | {
|
---|
1899 | pvsCost = vc->mPvsCost;
|
---|
1900 | }
|
---|
1901 |
|
---|
1902 | // if no pvs size stored, compute new one
|
---|
1903 | ViewCell *root = vc;
|
---|
1904 |
|
---|
1905 | // also add pvs from this view cell to root
|
---|
1906 | while (root->GetParent())
|
---|
1907 | {
|
---|
1908 | root = root->GetParent();
|
---|
1909 |
|
---|
1910 | // matt: bug! must evaluate kd pvss also
|
---|
1911 | pvsCost += CountPvsContribution(root);
|
---|
1912 | }
|
---|
1913 |
|
---|
1914 | stack<ViewCell *> tstack;
|
---|
1915 | tstack.push(vc);
|
---|
1916 |
|
---|
1917 | while (!tstack.empty())
|
---|
1918 | {
|
---|
1919 | vc = tstack.top();
|
---|
1920 | tstack.pop();
|
---|
1921 |
|
---|
1922 | // matt: bug! must evaluate kd pvss also
|
---|
1923 | pvsCost += CountPvsContribution(vc);
|
---|
1924 |
|
---|
1925 | if (!vc->IsLeaf())
|
---|
1926 | {
|
---|
1927 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
1928 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
1929 |
|
---|
1930 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1931 | {
|
---|
1932 | tstack.push(*it);
|
---|
1933 | }
|
---|
1934 | }
|
---|
1935 | }
|
---|
1936 |
|
---|
1937 | return pvsCost;
|
---|
1938 | }
|
---|
1939 |
|
---|
1940 |
|
---|
1941 | int ViewCellsTree::GetEntriesInPvsForCompressedStorage(ViewCell *vc) const
|
---|
1942 | {
|
---|
1943 | int pvsSize = 0;
|
---|
1944 |
|
---|
1945 | /////////////////
|
---|
1946 | //-- compressed pvs
|
---|
1947 |
|
---|
1948 | // the stored pvs size is the valid pvs size => just return scalar
|
---|
1949 | if (vc->mPvsSizeValid)
|
---|
1950 | {
|
---|
1951 | pvsSize = vc->mEntriesInPvs;
|
---|
1952 | }
|
---|
1953 |
|
---|
1954 | // if no pvs size stored, compute new one
|
---|
1955 | ViewCell *root = vc;
|
---|
1956 |
|
---|
1957 | // also add pvs from this view cell to root
|
---|
1958 | while (root->GetParent())
|
---|
1959 | {
|
---|
1960 | root = root->GetParent();
|
---|
1961 | // count the pvs entries different from the already found ones
|
---|
1962 | pvsSize += CountPvsContribution(root);
|
---|
1963 | }
|
---|
1964 |
|
---|
1965 | stack<ViewCell *> tstack;
|
---|
1966 | tstack.push(vc);
|
---|
1967 |
|
---|
1968 | while (!tstack.empty())
|
---|
1969 | {
|
---|
1970 | vc = tstack.top();
|
---|
1971 | tstack.pop();
|
---|
1972 |
|
---|
1973 | // count the pvs entries different from the already found ones
|
---|
1974 | pvsSize += CountPvsContribution(vc);
|
---|
1975 |
|
---|
1976 | if (!vc->IsLeaf())
|
---|
1977 | {
|
---|
1978 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
1979 |
|
---|
1980 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
1981 |
|
---|
1982 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
1983 | {
|
---|
1984 | tstack.push(*it);
|
---|
1985 | }
|
---|
1986 | }
|
---|
1987 | }
|
---|
1988 |
|
---|
1989 | return pvsSize;
|
---|
1990 | }
|
---|
1991 |
|
---|
1992 |
|
---|
1993 | float ViewCellsTree::GetPvsCost(ViewCell *vc) const
|
---|
1994 | {
|
---|
1995 | float pvsCost = 0;
|
---|
1996 | Intersectable::NewMail();
|
---|
1997 |
|
---|
1998 | ////////////////////////////////////////////////
|
---|
1999 | // for interiors, pvs can be stored using different methods
|
---|
2000 | //
|
---|
2001 |
|
---|
2002 | switch (mViewCellsStorage)
|
---|
2003 | {
|
---|
2004 | case PVS_IN_LEAVES:
|
---|
2005 | // pvs is stored only in leaves
|
---|
2006 | pvsCost = GetPvsCostForLeafStorage(vc);
|
---|
2007 | break;
|
---|
2008 | case COMPRESSED:
|
---|
2009 | pvsCost = GetPvsCostForCompressedStorage(vc);
|
---|
2010 | break;
|
---|
2011 | case PVS_IN_INTERIORS:
|
---|
2012 | default:
|
---|
2013 | // pvs is stored consistently in the tree up
|
---|
2014 | //to the root just return pvs size
|
---|
2015 | pvsCost = vc->GetPvs().EvalPvsCost();
|
---|
2016 | break;
|
---|
2017 | }
|
---|
2018 |
|
---|
2019 | return pvsCost;
|
---|
2020 | }
|
---|
2021 |
|
---|
2022 |
|
---|
2023 | int ViewCellsTree::GetPvsEntries(ViewCell *vc) const
|
---|
2024 | {
|
---|
2025 | int pvsSize = 0;
|
---|
2026 |
|
---|
2027 | Intersectable::NewMail();
|
---|
2028 |
|
---|
2029 | ////////////////////////////////////////////////
|
---|
2030 | // for interiors, pvs can be stored using different methods
|
---|
2031 |
|
---|
2032 | switch (mViewCellsStorage)
|
---|
2033 | {
|
---|
2034 | case PVS_IN_LEAVES:
|
---|
2035 | {
|
---|
2036 | //-- store pvs only in leaves
|
---|
2037 | pvsSize = GetEntriesInPvsForLeafStorage(vc);
|
---|
2038 | break;
|
---|
2039 | }
|
---|
2040 | case COMPRESSED:
|
---|
2041 | {
|
---|
2042 | pvsSize = GetEntriesInPvsForCompressedStorage(vc);
|
---|
2043 | break;
|
---|
2044 | }
|
---|
2045 | case PVS_IN_INTERIORS:
|
---|
2046 | default:
|
---|
2047 | // pvs is stored consistently in the tree up to the root
|
---|
2048 | // just return pvs size
|
---|
2049 | pvsSize = vc->GetPvs().GetSize();
|
---|
2050 | break;
|
---|
2051 | }
|
---|
2052 |
|
---|
2053 | return pvsSize;
|
---|
2054 | }
|
---|
2055 |
|
---|
2056 |
|
---|
2057 | float ViewCellsTree::GetMemoryCost(ViewCell *vc) const
|
---|
2058 | {
|
---|
2059 | return (float)CountStoredPvsEntries(vc) * ObjectPvs::GetEntrySize();
|
---|
2060 | }
|
---|
2061 |
|
---|
2062 | //#if HAS_TO_BE_REDONE
|
---|
2063 | int ViewCellsTree::CountStoredPvsEntries(ViewCell *root) const
|
---|
2064 | {
|
---|
2065 | int pvsSize = root->GetPvs().GetSize();
|
---|
2066 |
|
---|
2067 | // recursivly count leaves
|
---|
2068 | if (!root->IsLeaf())
|
---|
2069 | {
|
---|
2070 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(root);
|
---|
2071 |
|
---|
2072 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2073 |
|
---|
2074 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2075 | {
|
---|
2076 | pvsSize += CountStoredPvsEntries(*it);
|
---|
2077 | }
|
---|
2078 | }
|
---|
2079 |
|
---|
2080 | return pvsSize;
|
---|
2081 | }
|
---|
2082 | //#endif
|
---|
2083 |
|
---|
2084 | int ViewCellsTree::ViewCellsStorage() const
|
---|
2085 | {
|
---|
2086 | return mViewCellsStorage;
|
---|
2087 | }
|
---|
2088 |
|
---|
2089 |
|
---|
2090 | ViewCell *ViewCellsTree::GetActiveViewCell(ViewCellLeaf *vc) const
|
---|
2091 | {
|
---|
2092 | return vc->GetActiveViewCell();
|
---|
2093 | }
|
---|
2094 |
|
---|
2095 |
|
---|
2096 | void ViewCellsTree::PropagatePvs(ViewCell *root)
|
---|
2097 | {
|
---|
2098 | ViewCell *viewCell = root;
|
---|
2099 |
|
---|
2100 | // propagate pvs up
|
---|
2101 | while (viewCell->GetParent())
|
---|
2102 | {
|
---|
2103 | ObjectPvs mergedPvs;
|
---|
2104 | viewCell->GetParent()->GetPvs().MergeInPlace(root->GetPvs());
|
---|
2105 |
|
---|
2106 | viewCell = viewCell->GetParent();
|
---|
2107 | }
|
---|
2108 |
|
---|
2109 | if (root->IsLeaf())
|
---|
2110 | return;
|
---|
2111 |
|
---|
2112 | // propagate pvs to the leaves
|
---|
2113 | stack<ViewCell *> tstack;
|
---|
2114 | tstack.push(root);
|
---|
2115 |
|
---|
2116 | while (!tstack.empty())
|
---|
2117 | {
|
---|
2118 | ViewCell *viewCell = tstack.top();
|
---|
2119 | tstack.pop();
|
---|
2120 |
|
---|
2121 | if (viewCell != root)
|
---|
2122 | {
|
---|
2123 | viewCell->GetPvs().MergeInPlace(root->GetPvs());
|
---|
2124 | }
|
---|
2125 |
|
---|
2126 | if (!viewCell->IsLeaf())
|
---|
2127 | {
|
---|
2128 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(viewCell);
|
---|
2129 |
|
---|
2130 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2131 |
|
---|
2132 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2133 | {
|
---|
2134 | tstack.push(*it);
|
---|
2135 | }
|
---|
2136 | }
|
---|
2137 | }
|
---|
2138 | }
|
---|
2139 |
|
---|
2140 |
|
---|
2141 | void ViewCellsTree::AssignRandomColors()
|
---|
2142 | {
|
---|
2143 | TraversalQueue tqueue;
|
---|
2144 | tqueue.push(mRoot);
|
---|
2145 |
|
---|
2146 | mRoot->SetColor(RandomColor(0.3f, 1.0f));
|
---|
2147 |
|
---|
2148 | while (!tqueue.empty())
|
---|
2149 | {
|
---|
2150 | ViewCell *vc = tqueue.top();
|
---|
2151 | tqueue.pop();
|
---|
2152 |
|
---|
2153 | // save the view cells if it is a leaf or if enough view cells
|
---|
2154 | // have already been traversed because of the priority queue,
|
---|
2155 | // this will be the optimal set of v
|
---|
2156 | if (!vc->IsLeaf())
|
---|
2157 | {
|
---|
2158 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
2159 |
|
---|
2160 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2161 |
|
---|
2162 | float maxProbability = -1.0f;
|
---|
2163 |
|
---|
2164 | ViewCell *maxViewCell = NULL;
|
---|
2165 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2166 | {
|
---|
2167 | ViewCell *v = *it;
|
---|
2168 |
|
---|
2169 | // set random color
|
---|
2170 | v->SetColor(RandomColor(0.3f, 1.0f));
|
---|
2171 |
|
---|
2172 | if (v->GetVolume() > maxProbability)
|
---|
2173 | {
|
---|
2174 | maxProbability = v->GetVolume();
|
---|
2175 | maxViewCell = v;
|
---|
2176 | }
|
---|
2177 |
|
---|
2178 | if (maxViewCell)
|
---|
2179 | {
|
---|
2180 | maxViewCell->SetColor(vc->GetColor());
|
---|
2181 | }
|
---|
2182 |
|
---|
2183 | tqueue.push(v);
|
---|
2184 | }
|
---|
2185 | }
|
---|
2186 | }
|
---|
2187 | }
|
---|
2188 |
|
---|
2189 |
|
---|
2190 | /** Get costs resulting from each merge step.
|
---|
2191 | */
|
---|
2192 | void ViewCellsTree::GetCostFunction(vector<float> &costFunction)
|
---|
2193 | {
|
---|
2194 | TraversalQueue tqueue;
|
---|
2195 | tqueue.push(mRoot);
|
---|
2196 |
|
---|
2197 | int numViewCells = 1;
|
---|
2198 |
|
---|
2199 | const float vol = mViewCellsManager->GetViewSpaceBox().GetVolume();
|
---|
2200 | const float rootPvs = GetPvsCost(mRoot);
|
---|
2201 |
|
---|
2202 | float totalRenderCost;
|
---|
2203 |
|
---|
2204 | float totalPvsCost = rootPvs;
|
---|
2205 | totalRenderCost = (float)rootPvs;
|
---|
2206 |
|
---|
2207 | costFunction.push_back(totalRenderCost);
|
---|
2208 |
|
---|
2209 | //-- go through tree in the order of render cost decrease
|
---|
2210 | //-- which is the same order as the view cells were merged
|
---|
2211 | //-- or the reverse order of subdivision for subdivision-only
|
---|
2212 | //-- view cell hierarchies.
|
---|
2213 |
|
---|
2214 | while (!tqueue.empty())
|
---|
2215 | {
|
---|
2216 | ViewCell *vc = tqueue.top();
|
---|
2217 | tqueue.pop();
|
---|
2218 |
|
---|
2219 | if (!vc->IsLeaf())
|
---|
2220 | {
|
---|
2221 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
2222 |
|
---|
2223 | const float parentCost = GetPvsCost(interior);
|
---|
2224 | const float parentExpCost = parentCost * interior->GetVolume();
|
---|
2225 |
|
---|
2226 | -- numViewCells;
|
---|
2227 |
|
---|
2228 | float childExpCost = 0;
|
---|
2229 | float childCost = 0;
|
---|
2230 |
|
---|
2231 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2232 |
|
---|
2233 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2234 | {
|
---|
2235 | ViewCell *vc = *it;
|
---|
2236 |
|
---|
2237 | const float pvsCost = GetPvsCost(vc);
|
---|
2238 |
|
---|
2239 | childExpCost += (float) pvsCost * vc->GetVolume();
|
---|
2240 | childCost += pvsCost;
|
---|
2241 |
|
---|
2242 | tqueue.push(vc);
|
---|
2243 | ++ numViewCells;
|
---|
2244 | }
|
---|
2245 |
|
---|
2246 | // update stats for this view cell
|
---|
2247 | const float costDecr = (parentExpCost - childExpCost) / vol;
|
---|
2248 | totalRenderCost -= costDecr;
|
---|
2249 |
|
---|
2250 | costFunction.push_back(totalRenderCost);
|
---|
2251 | }
|
---|
2252 | }
|
---|
2253 | }
|
---|
2254 |
|
---|
2255 |
|
---|
2256 | /** Get storage costs resulting from each merge step.
|
---|
2257 | */
|
---|
2258 | void ViewCellsTree::GetStorageFunction(vector<int> &storageFunction)
|
---|
2259 | {
|
---|
2260 | TraversalQueue tqueue;
|
---|
2261 | tqueue.push(mRoot);
|
---|
2262 |
|
---|
2263 | int numViewCells = 1;
|
---|
2264 |
|
---|
2265 | const float vol = mViewCellsManager->GetViewSpaceBox().GetVolume();
|
---|
2266 | const int rootEntries = GetPvsEntries(mRoot);
|
---|
2267 |
|
---|
2268 | int entriesInPvs = rootEntries;
|
---|
2269 | const int entryStorage = sizeof(PvsData) + sizeof(int); // one entry into the pvs
|
---|
2270 |
|
---|
2271 | storageFunction.push_back(rootEntries);
|
---|
2272 |
|
---|
2273 | ////////////
|
---|
2274 | //-- go through tree in the order of render cost decrease
|
---|
2275 | //-- which is the same order as the view cells were merged
|
---|
2276 | //-- or the reverse order of subdivision for subdivision-only
|
---|
2277 | //-- view cell hierarchies.
|
---|
2278 |
|
---|
2279 | while (!tqueue.empty())
|
---|
2280 | {
|
---|
2281 | ViewCell *vc = tqueue.top();
|
---|
2282 | tqueue.pop();
|
---|
2283 |
|
---|
2284 | if (!vc->IsLeaf())
|
---|
2285 | {
|
---|
2286 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
2287 |
|
---|
2288 | const float parentPvsCost = GetPvsCost(interior);
|
---|
2289 | const int parentPvsEntries = GetPvsEntries(interior);
|
---|
2290 | const float parentExpCost = (float)parentPvsCost * interior->GetVolume();
|
---|
2291 |
|
---|
2292 | float childExpCost = 0;
|
---|
2293 | int childPvs = 0;
|
---|
2294 | int childPvsEntries = 0;
|
---|
2295 |
|
---|
2296 | -- numViewCells;
|
---|
2297 |
|
---|
2298 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2299 |
|
---|
2300 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2301 | {
|
---|
2302 | ViewCell *vc = *it;
|
---|
2303 |
|
---|
2304 | const int pvsEntries = GetPvsEntries(vc);
|
---|
2305 | childPvsEntries += pvsEntries;
|
---|
2306 |
|
---|
2307 | tqueue.push(vc);
|
---|
2308 | ++ numViewCells;
|
---|
2309 | }
|
---|
2310 |
|
---|
2311 | // update stats for this view cell
|
---|
2312 | const float costDecr = (parentExpCost - childExpCost) / vol;
|
---|
2313 |
|
---|
2314 | entriesInPvs += childPvsEntries - parentPvsEntries;
|
---|
2315 |
|
---|
2316 | const int storageCost = entriesInPvs * entryStorage;
|
---|
2317 | storageFunction.push_back(storageCost);
|
---|
2318 | }
|
---|
2319 | }
|
---|
2320 | }
|
---|
2321 |
|
---|
2322 |
|
---|
2323 |
|
---|
2324 | void ViewCellsTree::UpdateViewCellsStats(ViewCell *vc,
|
---|
2325 | ViewCellsStatistics &vcStat)
|
---|
2326 | {
|
---|
2327 | ++ vcStat.viewCells;
|
---|
2328 |
|
---|
2329 | const float pvsCost = GetPvsCost(vc);
|
---|
2330 |
|
---|
2331 | vcStat.pvsCost += pvsCost;
|
---|
2332 |
|
---|
2333 | if (pvsCost < Limits::Small)
|
---|
2334 | ++ vcStat.emptyPvs;
|
---|
2335 |
|
---|
2336 | if (pvsCost > vcStat.maxPvs)
|
---|
2337 | vcStat.maxPvs = pvsCost;
|
---|
2338 |
|
---|
2339 | if (pvsCost < vcStat.minPvs)
|
---|
2340 | vcStat.minPvs = pvsCost;
|
---|
2341 |
|
---|
2342 | if (!vc->GetValid())
|
---|
2343 | ++ vcStat.invalid;
|
---|
2344 | }
|
---|
2345 |
|
---|
2346 |
|
---|
2347 | bool ViewCellsTree::Export(OUT_STREAM &stream, const bool exportPvs)
|
---|
2348 | {
|
---|
2349 | // export recursivly all view cells from the root
|
---|
2350 | ExportViewCell(mRoot, stream, exportPvs);
|
---|
2351 |
|
---|
2352 | return true;
|
---|
2353 | }
|
---|
2354 |
|
---|
2355 |
|
---|
2356 | void ViewCellsTree::CreateUniqueViewCellsIds()
|
---|
2357 | {
|
---|
2358 | stack<ViewCell *> tstack;
|
---|
2359 |
|
---|
2360 | int currentId = 0;
|
---|
2361 |
|
---|
2362 | tstack.push(mRoot);
|
---|
2363 |
|
---|
2364 | while (!tstack.empty())
|
---|
2365 | {
|
---|
2366 | ViewCell *vc = tstack.top();
|
---|
2367 | tstack.pop();
|
---|
2368 |
|
---|
2369 | if (vc->GetId() != -1) // out of bounds
|
---|
2370 | vc->SetId(currentId ++);
|
---|
2371 |
|
---|
2372 | if (!vc->IsLeaf())
|
---|
2373 | {
|
---|
2374 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
2375 |
|
---|
2376 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2377 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2378 | {
|
---|
2379 | tstack.push(*it);
|
---|
2380 | }
|
---|
2381 | }
|
---|
2382 | }
|
---|
2383 | }
|
---|
2384 |
|
---|
2385 |
|
---|
2386 | void ViewCellsTree::ExportPvs(ViewCell *viewCell, OUT_STREAM &stream)
|
---|
2387 | {
|
---|
2388 | ObjectPvsIterator it = viewCell->GetPvs().GetIterator();
|
---|
2389 |
|
---|
2390 | while (it.HasMoreEntries())
|
---|
2391 | {
|
---|
2392 | ObjectPvsEntry entry = it.Next();
|
---|
2393 | Intersectable *obj = entry.mObject;
|
---|
2394 |
|
---|
2395 | // hack: just output full pvs
|
---|
2396 | if (0 && (obj->Type() == Intersectable::BVH_INTERSECTABLE))
|
---|
2397 | {
|
---|
2398 | ObjectContainer objects;
|
---|
2399 | BvhNode *node = dynamic_cast<BvhNode *>(obj);
|
---|
2400 | node->CollectObjects(objects);
|
---|
2401 |
|
---|
2402 | ObjectContainer::const_iterator oit, oit_end = objects.end();
|
---|
2403 | for (oit = objects.begin(); oit != oit_end; ++ oit)
|
---|
2404 | {
|
---|
2405 | stream << (*oit)->GetId() << " ";
|
---|
2406 | }
|
---|
2407 | }
|
---|
2408 | else
|
---|
2409 | {
|
---|
2410 | stream << entry.mObject->GetId() << " ";
|
---|
2411 | }
|
---|
2412 | }
|
---|
2413 | }
|
---|
2414 |
|
---|
2415 |
|
---|
2416 | void ViewCellsTree::ExportViewCell(ViewCell *viewCell,
|
---|
2417 | OUT_STREAM &stream,
|
---|
2418 | const bool exportPvs)
|
---|
2419 | {
|
---|
2420 | if (viewCell->IsLeaf())
|
---|
2421 | {
|
---|
2422 | stream << "<Leaf ";
|
---|
2423 | stream << "id=\"" << viewCell->GetId() << "\" ";
|
---|
2424 | stream << "active=\"" << dynamic_cast<ViewCellLeaf *>(viewCell)->GetActiveViewCell()->GetId() << "\" ";
|
---|
2425 | stream << "mergecost=\"" << viewCell->GetMergeCost() << "\" ";
|
---|
2426 | stream << "pvs=\"";
|
---|
2427 |
|
---|
2428 | //-- export pvs, i.e., the ids of the objects in the pvs
|
---|
2429 | if (exportPvs)
|
---|
2430 | {
|
---|
2431 | ExportPvs(viewCell, stream);
|
---|
2432 | }
|
---|
2433 | stream << "\" />" << endl;
|
---|
2434 | }
|
---|
2435 | else
|
---|
2436 | {
|
---|
2437 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(viewCell);
|
---|
2438 |
|
---|
2439 | stream << "<Interior ";
|
---|
2440 | stream << "id=\"" << viewCell->GetId() << "\" ";
|
---|
2441 | stream << "mergecost=\"" << viewCell->GetMergeCost() << "\" ";
|
---|
2442 | stream << "pvs=\"";
|
---|
2443 |
|
---|
2444 | // NOTE: do not export pvss for interior view cells because
|
---|
2445 | // they can be completely reconstructed from the leaf pvss
|
---|
2446 | // on the other hand: we could store a tag with the compression scheme,
|
---|
2447 | // then some scheme were pvs is in the interiors could be used
|
---|
2448 | if (exportPvs)
|
---|
2449 | {
|
---|
2450 | ExportPvs(viewCell, stream);
|
---|
2451 | }
|
---|
2452 |
|
---|
2453 | stream << "\" >" << endl;
|
---|
2454 |
|
---|
2455 | //-- recursivly export child view cells
|
---|
2456 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2457 |
|
---|
2458 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2459 | {
|
---|
2460 | ExportViewCell(*it, stream, exportPvs);
|
---|
2461 | }
|
---|
2462 |
|
---|
2463 | stream << "</Interior>" << endl;
|
---|
2464 | }
|
---|
2465 | }
|
---|
2466 |
|
---|
2467 |
|
---|
2468 | void ViewCellsTree::ResetPvs()
|
---|
2469 | {
|
---|
2470 | stack<ViewCell *> tstack;
|
---|
2471 |
|
---|
2472 | tstack.push(mRoot);
|
---|
2473 |
|
---|
2474 | while (!tstack.empty())
|
---|
2475 | {
|
---|
2476 | ViewCell *vc = tstack.top();
|
---|
2477 | tstack.pop();
|
---|
2478 |
|
---|
2479 | vc->GetPvs().Clear();
|
---|
2480 |
|
---|
2481 | if (!vc->IsLeaf())
|
---|
2482 | {
|
---|
2483 | ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
|
---|
2484 | ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
|
---|
2485 |
|
---|
2486 | for (it = interior->mChildren.begin(); it != it_end; ++ it)
|
---|
2487 | {
|
---|
2488 | tstack.push(*it);
|
---|
2489 | }
|
---|
2490 | }
|
---|
2491 | }
|
---|
2492 | }
|
---|
2493 |
|
---|
2494 |
|
---|
2495 | void ViewCellsTree::SetViewCellsManager(ViewCellsManager *vcm)
|
---|
2496 | {
|
---|
2497 | mViewCellsManager = vcm;
|
---|
2498 | }
|
---|
2499 |
|
---|
2500 |
|
---|
2501 | void ViewCellsTree::SetActiveSetToLeaves()
|
---|
2502 | {
|
---|
2503 | // todo
|
---|
2504 | }
|
---|
2505 |
|
---|
2506 |
|
---|
2507 |
|
---|
2508 | /**************************************************************************/
|
---|
2509 | /* MergeCandidate implementation */
|
---|
2510 | /**************************************************************************/
|
---|
2511 |
|
---|
2512 |
|
---|
2513 | MergeCandidate::MergeCandidate(ViewCell *l, ViewCell *r):
|
---|
2514 | mRenderCost(0),
|
---|
2515 | mDeviationIncr(0),
|
---|
2516 | mLeftViewCell(l),
|
---|
2517 | mRightViewCell(r),
|
---|
2518 | mInitialLeftViewCell(l),
|
---|
2519 | mInitialRightViewCell(r)
|
---|
2520 | {
|
---|
2521 | //EvalMergeCost();
|
---|
2522 | }
|
---|
2523 |
|
---|
2524 |
|
---|
2525 | void MergeCandidate::SetRightViewCell(ViewCell *v)
|
---|
2526 | {
|
---|
2527 | mRightViewCell = v;
|
---|
2528 | }
|
---|
2529 |
|
---|
2530 |
|
---|
2531 | void MergeCandidate::SetLeftViewCell(ViewCell *v)
|
---|
2532 | {
|
---|
2533 | mLeftViewCell = v;
|
---|
2534 | }
|
---|
2535 |
|
---|
2536 |
|
---|
2537 | ViewCell *MergeCandidate::GetRightViewCell() const
|
---|
2538 | {
|
---|
2539 | return mRightViewCell;
|
---|
2540 | }
|
---|
2541 |
|
---|
2542 |
|
---|
2543 | ViewCell *MergeCandidate::GetLeftViewCell() const
|
---|
2544 | {
|
---|
2545 | return mLeftViewCell;
|
---|
2546 | }
|
---|
2547 |
|
---|
2548 |
|
---|
2549 | ViewCell *MergeCandidate::GetInitialRightViewCell() const
|
---|
2550 | {
|
---|
2551 | return mInitialRightViewCell;
|
---|
2552 | }
|
---|
2553 |
|
---|
2554 |
|
---|
2555 | ViewCell *MergeCandidate::GetInitialLeftViewCell() const
|
---|
2556 | {
|
---|
2557 | return mInitialLeftViewCell;
|
---|
2558 | }
|
---|
2559 |
|
---|
2560 |
|
---|
2561 | bool MergeCandidate::IsValid() const
|
---|
2562 | {
|
---|
2563 | // if one has a parent, it was already merged
|
---|
2564 | return !(mLeftViewCell->GetParent() || mRightViewCell->GetParent());
|
---|
2565 | }
|
---|
2566 |
|
---|
2567 |
|
---|
2568 | float MergeCandidate::GetRenderCost() const
|
---|
2569 | {
|
---|
2570 | return mRenderCost;
|
---|
2571 | }
|
---|
2572 |
|
---|
2573 |
|
---|
2574 | float MergeCandidate::GetDeviationIncr() const
|
---|
2575 | {
|
---|
2576 | return mDeviationIncr;
|
---|
2577 | }
|
---|
2578 |
|
---|
2579 |
|
---|
2580 | float MergeCandidate::GetMergeCost() const
|
---|
2581 | {
|
---|
2582 | return mRenderCost * sRenderCostWeight +
|
---|
2583 | mDeviationIncr * (1.0f - sRenderCostWeight);
|
---|
2584 | }
|
---|
2585 |
|
---|
2586 |
|
---|
2587 |
|
---|
2588 | /************************************************************************/
|
---|
2589 | /* MergeStatistics implementation */
|
---|
2590 | /************************************************************************/
|
---|
2591 |
|
---|
2592 |
|
---|
2593 | void MergeStatistics::Print(ostream &app) const
|
---|
2594 | {
|
---|
2595 | app << "===== Merge statistics ===============\n";
|
---|
2596 |
|
---|
2597 | app << setprecision(4);
|
---|
2598 |
|
---|
2599 | app << "#N_CTIME ( Overall time [s] )\n" << Time() << " \n";
|
---|
2600 |
|
---|
2601 | app << "#N_CCTIME ( Collect candidates time [s] )\n" << collectTime * 1e-3f << " \n";
|
---|
2602 |
|
---|
2603 | app << "#N_MTIME ( Merge time [s] )\n" << mergeTime * 1e-3f << " \n";
|
---|
2604 |
|
---|
2605 | app << "#N_NODES ( Number of nodes before merge )\n" << nodes << "\n";
|
---|
2606 |
|
---|
2607 | app << "#N_CANDIDATES ( Number of merge candidates )\n" << candidates << "\n";
|
---|
2608 |
|
---|
2609 | app << "#N_MERGEDSIBLINGS ( Number of merged siblings )\n" << siblings << "\n";
|
---|
2610 |
|
---|
2611 | app << "#OVERALLCOST ( overall merge cost )\n" << overallCost << "\n";
|
---|
2612 |
|
---|
2613 | app << "#N_MERGEDNODES ( Number of merged nodes )\n" << merged << "\n";
|
---|
2614 |
|
---|
2615 | app << "#MAX_TREEDIST ( Maximal distance in tree of merged leaves )\n" << maxTreeDist << "\n";
|
---|
2616 |
|
---|
2617 | app << "#AVG_TREEDIST ( Average distance in tree of merged leaves )\n" << AvgTreeDist() << "\n";
|
---|
2618 |
|
---|
2619 | app << "#EXPECTEDCOST ( expected render cost )\n" << expectedRenderCost << "\n";
|
---|
2620 |
|
---|
2621 | app << "#DEVIATION ( deviation )\n" << deviation << "\n";
|
---|
2622 |
|
---|
2623 | app << "#HEURISTICS ( heuristics )\n" << heuristics << "\n";
|
---|
2624 |
|
---|
2625 |
|
---|
2626 | app << "===== END OF BspTree statistics ==========\n";
|
---|
2627 | }
|
---|
2628 |
|
---|
2629 |
|
---|
2630 | }
|
---|