1 | #ifndef __PVS_H
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2 | #define __PVS_H
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3 |
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4 | #include <map>
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5 | #include <vector>
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6 | #include "common.h"
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7 | #include <math.h>
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8 | using namespace std;
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9 |
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10 | namespace GtpVisibilityPreprocessor {
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11 |
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12 | class KdNode;
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13 | class BspNode;
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14 | class Ray;
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15 | class Intersectable;
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16 | class ViewCell;
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17 |
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18 |
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19 | /** Information stored with a PVS entry. Consists of the number
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20 | the object was seen from the view cell.
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21 | */
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22 | template<typename T, typename S>
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23 | struct PvsEntry
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24 | {
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25 | public:
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26 |
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27 | PvsEntry() {}
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28 |
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29 | PvsEntry(T sample, const S &data): mObject(sample), mData(data) {}
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30 |
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31 | T mObject;
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32 | S mData;
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33 |
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34 | template<typename T, typename S>
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35 | friend int operator< (const PvsEntry<T, S> &a, const PvsEntry<T, S> &b);
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36 | template<typename T, typename S>
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37 | friend int operator== (const PvsEntry<T, S> &a, const PvsEntry<T, S> &b);
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38 | };
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39 |
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40 |
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41 | template<typename T, typename S>
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42 | int operator< (const PvsEntry<T, S> &a, const PvsEntry<T, S> &b)
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43 | {
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44 | return a.mObject < b.mObject;
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45 | }
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46 |
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47 | template<typename T, typename S>
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48 | int operator== (const PvsEntry<T, S> &a, const PvsEntry<T, S> &b)
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49 | {
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50 | return a.mObject == b.mObject;
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51 | }
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52 |
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53 |
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54 | template<typename T, typename S>
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55 | struct LtSample
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56 | {
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57 | bool operator()(const PvsEntry<T, S> &a, const PvsEntry<T, S> &b) const
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58 | {
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59 | return a.mObject < b.mObject;
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60 | }
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61 | };
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62 |
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63 | template<typename T, typename S>
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64 | int equalSample (const PvsEntry<T, S> &a, const PvsEntry<T, S> &b)
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65 | {
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66 | return a.mObject == b.mObject;
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67 | }
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68 |
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69 | /** Information stored with a PVS entry. Consists of the number
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70 | the object was seen from the view cell.
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71 | */
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72 | struct PvsData {
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73 | public:
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74 | PvsData() {}
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75 | PvsData(const float sumPdf):
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76 | mSumPdf(sumPdf) {}
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77 |
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78 | // $$JB in order to return meaningfull values
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79 | // it assumes that the sum pdf has been normalized somehow!!!
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80 | inline float GetVisibility()
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81 | {
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82 | return mSumPdf;
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83 | }
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84 |
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85 | /// sum of probability density of visible sample rays
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86 | float mSumPdf;
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87 | };
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88 |
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89 |
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90 | class MailablePvsData
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91 | {
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92 | public:
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93 | // sum of probability density of visible sample rays
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94 | float mSumPdf;
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95 | int mCounter;
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96 |
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97 | MailablePvsData() {}
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98 | MailablePvsData(const float sumPdf):
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99 | mSumPdf(sumPdf) {}
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100 |
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101 | // $$JB in order to return meaningfull values
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102 | // it assumes that the sum pdf has been normalized somehow!!!
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103 | float GetVisibility()
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104 | {
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105 | return mSumPdf;
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106 | }
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107 |
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108 | ///////////////
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109 | // Mailing stuff
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110 |
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111 | // last mail id -> warning not thread safe!
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112 | // both mailId and mailbox should be unique for each thread!!!
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113 | static int sMailId;
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114 | static int sReservedMailboxes;
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115 |
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116 | static void NewMail(const int reserve = 1) {
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117 | sMailId += sReservedMailboxes;
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118 | sReservedMailboxes = reserve;
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119 | }
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120 |
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121 | void Mail() { mMailbox = sMailId; }
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122 | bool Mailed() const { return mMailbox == sMailId; }
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123 |
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124 | void Mail(const int mailbox) { mMailbox = sMailId + mailbox; }
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125 | bool Mailed(const int mailbox) const { return mMailbox == sMailId + mailbox; }
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126 |
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127 | int IncMail() { return ++ mMailbox - sMailId; }
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128 |
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129 | //////////////////////////////////////////
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130 |
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131 | protected:
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132 |
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133 | int mMailbox;
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134 |
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135 | };
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136 |
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137 |
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138 | template<typename T, typename S>
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139 | class PvsIterator
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140 | {
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141 | public:
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142 |
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143 | PvsIterator<T, S>() {}
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144 |
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145 | PvsIterator<T, S>(const typename vector<PvsEntry<T, S> >::const_iterator &itCurrent,
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146 | const typename vector<PvsEntry<T, S> >::const_iterator &itEnd):
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147 | mItCurrent(itCurrent), mItEnd(itEnd)
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148 | {
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149 | }
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150 |
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151 | bool HasMoreEntries() const
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152 | {
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153 | return (mItCurrent != mItEnd);
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154 | }
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155 |
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156 | const PvsEntry<T, S> &Next()
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157 | {
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158 | return *(mItCurrent ++);
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159 | }
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160 |
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161 | private:
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162 | typename vector<PvsEntry<T, S> >::const_iterator mItCurrent;
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163 | typename vector<PvsEntry<T, S> >::const_iterator mItEnd;
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164 | };
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165 |
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166 |
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167 | /** Template class representing the Potentially Visible Set (PVS)
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168 | mainly from a view cell, but also e.g., from objects.
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169 | */
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170 | template<typename T, typename S>
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171 | class Pvs
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172 | {
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173 | template<typename T, typename S>
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174 | friend class PvsIterator;
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175 |
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176 | public:
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177 |
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178 | Pvs(): mSamples(0), mEntries(), mLastSorted(0), mQueriesSinceSort(0) {}
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179 |
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180 | /** creates pvs and initializes it with the given entries.
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181 | Assumes that entries are sorted-
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182 | */
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183 | Pvs(const vector<PvsEntry<T, S> > &samples);
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184 | virtual ~Pvs() {};
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185 |
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186 | /** Compresses PVS lossless or lossy.
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187 | */
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188 | int Compress()
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189 | {
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190 | return 0;
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191 | }
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192 |
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193 | int GetSize() const
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194 | {
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195 | return (int)mEntries.size();
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196 | }
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197 |
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198 | bool Empty() const
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199 | {
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200 | return mEntries.empty();
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201 | }
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202 |
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203 | void Reserve(const int n)
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204 | {
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205 | mEntries.reserve(n);
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206 | }
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207 |
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208 | /** Normalize the visibility of entries in order to get
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209 | comparable results.
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210 | */
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211 | void NormalizeMaximum();
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212 |
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213 | /** Merges pvs of a into this pvs.
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214 | Warning: very slow!
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215 | */
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216 | void MergeInPlace(const Pvs<T, S> &a);
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217 |
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218 | /** Difference of pvs to pvs b.
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219 | @returns number of different entries.
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220 | */
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221 | int Diff(const Pvs<T, S> &b);
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222 |
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223 | /** Finds sample in PVS.
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224 | @param checkDirty if dirty part of the pvs should be checked for entry
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225 | (warning: linear runtime in dirty part)
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226 | @returns iterator on the sample if found, else the place where
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227 | it would be added in the sorted vector.
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228 | */
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229 | bool Find(T sample,
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230 | typename vector<PvsEntry<T, S> >::iterator &it,
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231 | const bool checkDirty = true);
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232 |
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233 | bool GetSampleContribution(T sample, const float pdf, float &contribution);
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234 |
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235 | /** Adds sample to PVS.
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236 | @returns contribution of sample (0 or 1)
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237 | */
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238 | float AddSample(T sample, const float pdf);
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239 |
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240 | /** Adds sample to PVS without checking for presence of the sample
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241 | warning: pvs remains unsorted!
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242 | */
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243 | void AddSampleDirty(T sample, const float pdf);
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244 |
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245 | /** Adds sample dirty (on the end of the vector) but
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246 | first checks if sample is already in clean part of the pvs.
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247 | */
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248 | bool AddSampleDirtyCheck(T sample, const float pdf);//, float &contribution);
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249 |
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250 | /** Sort pvs entries - this should always be called after a
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251 | sequence of AddSampleDirty calls
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252 | */
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253 | void Sort();
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254 |
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255 | /** Sort pvs entries assume that the pvs contains unique entries
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256 | */
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257 | void SimpleSort();
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258 |
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259 | /** Adds sample to PVS.
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260 | @returns PvsData
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261 | */
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262 | typename std::vector<PvsEntry<T, S> >::iterator AddSample2(T sample, const float pdf);
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263 |
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264 | /** Subtracts one pvs from another one.
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265 | WARNING: could contains bugs
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266 | @returns new pvs size
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267 | */
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268 | int SubtractPvs(const Pvs<T, S> &pvs);
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269 |
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270 | /** Returns PVS data, i.e., how often it was seen from the view cell,
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271 | and the object itsef.
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272 | */
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273 | void GetData(const int index, T &entry, S &data);
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274 |
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275 | /** Collects the PVS entries and returns them in the vector.
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276 | */
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277 | void CollectEntries(std::vector<T> &entries);
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278 |
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279 | /** Removes sample from PVS if reference count is zero.
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280 | @param visibleSamples number of references to be removed
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281 | */
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282 | bool RemoveSample(T sample, const float pdf);
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283 |
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284 | /** Compute continuous PVS difference
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285 | */
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286 | void ComputeContinuousPvsDifference(Pvs<T, S> &pvs,
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287 | float &pvsReduction,
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288 | float &pvsEnlargement);
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289 |
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290 | /** Clears the pvs.
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291 | */
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292 | void Clear(const bool trim = true);
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293 |
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294 | void Trim();
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295 |
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296 | static int GetEntrySizeByte();
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297 | static float GetEntrySize();
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298 |
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299 | /** Compute continuous PVS difference
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300 | */
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301 | float GetPvsHomogenity(Pvs<T, S> &pvs);
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302 |
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303 | static void Merge(Pvs<T, S> &mergedPvs, const Pvs<T, S> &a, const Pvs<T, S> &b);
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304 |
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305 | int GetSamples() const
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306 | {
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307 | return mSamples;
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308 | }
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309 |
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310 | bool IsDirty() const
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311 | {
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312 | return mLastSorted < mEntries.size();
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313 | }
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314 |
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315 | bool RequiresResort() const
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316 | {
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317 | // the last part should not be more than log of the sorted part. this
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318 | // way we can achieve logarithmic behaviour for insertion and find
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319 | const int n = mEntries.size();
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320 | const int dirtySize = n - mLastSorted;
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321 |
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322 | #define LOG2E 1.442695040f
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323 |
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324 | const float logN = log((float)max(1, n))/LOG2E;
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325 | const float logS = log((float)max(1, mLastSorted))/LOG2E;
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326 | const float logD = log((float)max(1, dirtySize))/LOG2E;
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327 |
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328 | if (8*(n + 2*dirtySize*logD) <
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329 | mQueriesSinceSort*((mLastSorted*logS + dirtySize*dirtySize/2)/n - logN))
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330 | {
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331 | // cout<<"Q="<<mQueriesSinceSort<<" N="<<n<<" D="<<dirtySize<<endl;
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332 | return true;
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333 | }
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334 |
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335 | return false;
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336 | }
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337 |
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338 | bool RequiresResortLog() const
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339 | {
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340 | // the last part should not be more than log of the sorted part. this
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341 | // way we can achieve logarithmic behaviour for insertion and find
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342 | const int dirtySize = (int)mEntries.size() - mLastSorted;
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343 | return dirtySize > 4 * (int)(log((double)mEntries.size()) / log(2.0));
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344 | }
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345 |
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346 |
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347 | int GetLastSorted() const
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348 | {
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349 | return mLastSorted;
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350 | }
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351 |
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352 | typename PvsIterator<T, S> GetIterator() const;
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353 |
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354 | protected:
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355 |
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356 | static void Merge(Pvs<T, S> &mergedPvs,
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357 | const typename std::vector<PvsEntry<T, S> >::const_iterator &aBegin,
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358 | const typename std::vector<PvsEntry<T, S> >::const_iterator &aEnd,
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359 | const typename std::vector<PvsEntry<T, S> >::const_iterator &bBegin,
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360 | const typename std::vector<PvsEntry<T, S> >::const_iterator &bEnd,
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361 | const int aSamples,
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362 | const int bSamples);
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363 |
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364 | /// vector of PVS entries
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365 | vector<PvsEntry<T, S> > mEntries;
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366 |
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367 | /// Number of samples used to create the PVS
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368 | int mSamples;
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369 |
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370 | /// Last sorted entry in the pvs (important for find and merge)
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371 | int mLastSorted;
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372 |
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373 | int mQueriesSinceSort;
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374 | };
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375 |
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376 |
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377 | template <typename T, typename S>
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378 | Pvs<T, S>::Pvs(const vector<PvsEntry<T, S> > &samples)
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379 | {
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380 | mEntries.reserve(samples.size());
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381 | mEntries = samples;
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382 | mLastSorted = 0;
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383 | mSamples = samples.size();
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384 | }
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385 |
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386 |
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387 | template <typename T, typename S>
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388 | void Pvs<T, S>::Sort()
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389 | {
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390 | std::vector<PvsEntry<T, S> >::iterator it = mEntries.begin() + mLastSorted;
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391 | std::vector<PvsEntry<T, S> >::iterator it_end = mEntries.end();
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392 |
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393 | // throw out double entries
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394 | std::vector<PvsEntry<T, S> >::iterator newEnd = unique(it, it_end);
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395 | sort(it, newEnd);
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396 |
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397 | // now merge sorted ranges
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398 | ObjectPvs newPvs;
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399 | Merge(newPvs,
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400 | mEntries.begin(),
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401 | it,
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402 | it,
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403 | newEnd,
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404 | mSamples,
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405 | 0);
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406 |
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407 | mEntries = newPvs.mEntries;
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408 | mLastSorted = (int)mEntries.size();
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409 | mQueriesSinceSort = 0;
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410 | }
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411 |
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412 | template <typename T, typename S>
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413 | void Pvs<T, S>::SimpleSort()
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414 | {
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415 | // sort(mEntries.begin(), mEntries.end());
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416 | std::vector<PvsEntry<T, S> >::iterator it = mEntries.begin() + mLastSorted;
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417 |
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418 | sort(it, mEntries.end());
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419 | inplace_merge(mEntries.begin(), it, mEntries.end());
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420 |
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421 | mLastSorted = (int)mEntries.size();
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422 | mQueriesSinceSort = 0;
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423 | }
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424 |
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425 |
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426 | /**
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427 | Compute continuous PVS difference of 'b' with respect to the base PVS (*this).
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428 | Provides separatelly PVS reduction from PVS enlargement.
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429 |
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430 | */
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431 | template <typename T, typename S>
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432 | void
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433 | Pvs<T, S>::ComputeContinuousPvsDifference(Pvs<T, S> &b,
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434 | float &pvsReduction,
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435 | float &pvsEnlargement)
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436 | {
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437 | pvsReduction = 0.0f;
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438 | pvsEnlargement = 0.0f;
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439 |
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440 | // Uses sum of log differences, which corresponds to entropy
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441 | std::vector<PvsEntry<T, S> >::iterator it;
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442 |
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443 | for (it = b.mEntries.begin(); it != b.mEntries.end(); ++ it)
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444 | {
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445 | float bSumPdf = (*it).mData.mSumPdf;
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446 | float aSumPdf = 0.0f;
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447 |
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448 | vector<PvsEntry<T, S> >::iterator oit;
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449 | const bool entryFound = Find((*it).mObject, oit);
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450 |
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451 | if (entryFound)
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452 | {
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453 | aSumPdf = (*it).mData.mSumPdf;
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454 |
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455 | // mark this entry as processed to avoid double counting
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456 | (*it).mData.mSumPdf = -aSumPdf;
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457 | }
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458 |
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459 | #if 0
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460 | const float diff = bSumPdf - aSumPdf;
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461 |
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462 | if (diff > 0.0f)
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463 | {
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464 | pvsEnlargement += diff;
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465 | }
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466 | else
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467 | {
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468 | pvsReduction += -diff;
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469 | }
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470 | #else
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471 | if (!entryFound)
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472 | {
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473 | pvsEnlargement += 1.0f;
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474 | }
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475 | #endif
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476 | }
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477 |
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478 | for (it = mEntries.begin(); it != mEntries.end(); ++ it)
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479 | {
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480 | float aSumPdf = (*it).mData.mSumPdf;
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481 | float bSumPdf = 0.0f;
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482 | if (aSumPdf < 0.0f)
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483 | {
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484 | // this entry was already accounted for!
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485 | // just revert it back
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486 | (*it).mData.mSumPdf = -aSumPdf;
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487 | }
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488 | else
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489 | {
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490 | vector<PvsEntry<T, S> >::iterator oit;
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491 |
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492 | const bool entryFound = b.Find((*it).mObject, oit);
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493 |
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494 | if (entryFound) {
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495 | bSumPdf = (*oit).mData.mSumPdf;
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496 | }
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497 | #if 0
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498 | const float diff = bSumPdf - aSumPdf;
|
---|
499 |
|
---|
500 | if (diff > 0.0f) {
|
---|
501 | pvsEnlargement += diff;
|
---|
502 | } else {
|
---|
503 | pvsReduction += -diff;
|
---|
504 | }
|
---|
505 |
|
---|
506 | #else
|
---|
507 | if (!entryFound)
|
---|
508 | pvsReduction += 1.0f;
|
---|
509 | #endif
|
---|
510 | }
|
---|
511 | }
|
---|
512 | }
|
---|
513 |
|
---|
514 |
|
---|
515 | template <typename T, typename S>
|
---|
516 | int Pvs<T, S>::Diff(const Pvs<T, S> &b)
|
---|
517 | {
|
---|
518 | int dif = 0;
|
---|
519 |
|
---|
520 | std::vector<PvsEntry<T, S> >::const_iterator it;
|
---|
521 |
|
---|
522 | for (it = b.mEntries.begin(); it != b.mEntries.end(); ++ it)
|
---|
523 | {
|
---|
524 | vector<PvsEntry<T, S> >::iterator bit;
|
---|
525 | const bool entryFound = Find((*it).first, bit);
|
---|
526 |
|
---|
527 | if (!entryFound) ++ dif;
|
---|
528 | }
|
---|
529 |
|
---|
530 | return dif;
|
---|
531 | }
|
---|
532 |
|
---|
533 |
|
---|
534 | template <typename T, typename S>
|
---|
535 | void Pvs<T, S>::MergeInPlace(const Pvs<T, S> &a)
|
---|
536 | {
|
---|
537 | // early exit
|
---|
538 | if (a.Empty())
|
---|
539 | {
|
---|
540 | return;
|
---|
541 | }
|
---|
542 | else if (Empty())
|
---|
543 | {
|
---|
544 | mEntries.reserve(a.GetSize());
|
---|
545 | mEntries = a.mEntries;
|
---|
546 | mSamples = a.mSamples;
|
---|
547 | return;
|
---|
548 | }
|
---|
549 |
|
---|
550 | ObjectPvs interPvs;
|
---|
551 |
|
---|
552 | Merge(interPvs, *this, a);
|
---|
553 |
|
---|
554 | mEntries.reserve(interPvs.GetSize());
|
---|
555 | mEntries = interPvs.mEntries;
|
---|
556 | mSamples = interPvs.mSamples;
|
---|
557 | }
|
---|
558 |
|
---|
559 |
|
---|
560 | template <typename T, typename S>
|
---|
561 | void Pvs<T, S>::Merge(Pvs<T, S> &mergedPvs, const Pvs<T, S> &a, const Pvs<T, S> &b)
|
---|
562 | {
|
---|
563 | std::vector<PvsEntry<T, S> >::const_iterator ait = a.mEntries.begin(), ait_end = a.mEntries.end();
|
---|
564 | std::vector<PvsEntry<T, S> >::const_iterator bit = b.mEntries.begin(), bit_end = b.mEntries.end();
|
---|
565 |
|
---|
566 | Merge(mergedPvs,
|
---|
567 | ait, ait_end,
|
---|
568 | bit, bit_end,
|
---|
569 | a.mSamples,
|
---|
570 | b.mSamples);
|
---|
571 | }
|
---|
572 |
|
---|
573 |
|
---|
574 | template <typename T, typename S>
|
---|
575 | void Pvs<T, S>::Merge(Pvs<T, S> &mergedPvs,
|
---|
576 | const typename std::vector<PvsEntry<T, S> >::const_iterator &aBegin,
|
---|
577 | const typename std::vector<PvsEntry<T, S> >::const_iterator &aEnd,
|
---|
578 | const typename std::vector<PvsEntry<T, S> >::const_iterator &bBegin,
|
---|
579 | const typename std::vector<PvsEntry<T, S> >::const_iterator &bEnd,
|
---|
580 | const int aSamples,
|
---|
581 | const int bSamples)
|
---|
582 | {
|
---|
583 | std::vector<PvsEntry<T, S> >::const_iterator ait = aBegin;
|
---|
584 | std::vector<PvsEntry<T, S> >::const_iterator bit = bBegin;
|
---|
585 |
|
---|
586 | for (; (ait != aEnd); ++ ait)
|
---|
587 | {
|
---|
588 | Intersectable *aObj = (*ait).mObject;
|
---|
589 | Intersectable *bObj = NULL;
|
---|
590 | //Intersectable *bObjOld = NULL;
|
---|
591 |
|
---|
592 | const PvsEntry<T, S> &aEntry = (*ait);
|
---|
593 |
|
---|
594 | for (; (bit != bEnd) && ((*bit).mObject <= (*ait).mObject); ++ bit)
|
---|
595 | {
|
---|
596 | bObj = (*bit).mObject;
|
---|
597 |
|
---|
598 | // object found => add up probabilities
|
---|
599 | if (bObj == aEntry.mObject)
|
---|
600 | {
|
---|
601 | PvsData newData(aEntry.mData.mSumPdf + (*bit).mData.mSumPdf);
|
---|
602 | PvsEntry<T, S> entry(bObj, newData);
|
---|
603 | mergedPvs.mEntries.push_back(entry);
|
---|
604 | }
|
---|
605 | else
|
---|
606 | {
|
---|
607 | mergedPvs.mEntries.push_back(*bit);
|
---|
608 | }
|
---|
609 | }
|
---|
610 |
|
---|
611 | // only push back if objects different
|
---|
612 | // (equal case is handled by second loop)
|
---|
613 | if (aObj != bObj)
|
---|
614 | {
|
---|
615 | mergedPvs.mEntries.push_back(*ait);
|
---|
616 | }
|
---|
617 | }
|
---|
618 |
|
---|
619 | // add the rest
|
---|
620 | for (; (bit != bEnd); ++ bit)
|
---|
621 | {
|
---|
622 | mergedPvs.mEntries.push_back(*bit);
|
---|
623 | }
|
---|
624 |
|
---|
625 | mergedPvs.mSamples = aSamples + bSamples;
|
---|
626 | }
|
---|
627 |
|
---|
628 |
|
---|
629 | template <typename T, typename S> void Pvs<T, S>::Clear(const bool trim = true)
|
---|
630 | {
|
---|
631 | mEntries.clear();
|
---|
632 | mSamples = 0;
|
---|
633 | mLastSorted = 0;
|
---|
634 |
|
---|
635 | if (trim)
|
---|
636 | {
|
---|
637 | vector<PvsEntry<T,S> >().swap(mEntries);
|
---|
638 | }
|
---|
639 | }
|
---|
640 |
|
---|
641 |
|
---|
642 | template <typename T, typename S> void Pvs<T, S>::Trim()
|
---|
643 | {
|
---|
644 | vector<PvsEntry<T,S> >(mEntries).swap(mEntries);
|
---|
645 | }
|
---|
646 |
|
---|
647 |
|
---|
648 | template <typename T, typename S>
|
---|
649 | bool Pvs<T, S>::Find(T sample,
|
---|
650 | typename vector<PvsEntry<T, S> >::iterator &it,
|
---|
651 | const bool checkDirty)
|
---|
652 | {
|
---|
653 | bool found = false;
|
---|
654 |
|
---|
655 | PvsEntry<T, S> dummy(sample, PvsData());
|
---|
656 |
|
---|
657 | // only check clean part
|
---|
658 | vector<PvsEntry<T, S> >::iterator sorted_end = mEntries.begin() + mLastSorted;
|
---|
659 | mQueriesSinceSort++;
|
---|
660 |
|
---|
661 | // binary search
|
---|
662 | it = lower_bound(mEntries.begin(), sorted_end, dummy);
|
---|
663 |
|
---|
664 | if ((it != mEntries.end()) && ((*it).mObject == sample))
|
---|
665 | found = true;
|
---|
666 |
|
---|
667 | // sample not found yet => search further in the unsorted part
|
---|
668 | if (!found && checkDirty)
|
---|
669 | {
|
---|
670 | vector<PvsEntry<T, S> >::iterator dit, dit_end = mEntries.end();
|
---|
671 |
|
---|
672 | for (dit = sorted_end; (dit != dit_end) && ((*dit).mObject != sample); ++ dit);
|
---|
673 |
|
---|
674 | if (dit != dit_end)
|
---|
675 | {
|
---|
676 | found = true;
|
---|
677 | it = dit;
|
---|
678 | }
|
---|
679 | }
|
---|
680 |
|
---|
681 | return found;
|
---|
682 | }
|
---|
683 |
|
---|
684 |
|
---|
685 | template <typename T, typename S>
|
---|
686 | void Pvs<T, S>::GetData(const int index, T &entry, S &data)
|
---|
687 | {
|
---|
688 | std::vector<PvsEntry<T, S> >::iterator i = mEntries.begin();
|
---|
689 | for (int k = 0; k != index && i != mEntries.end(); ++ i, ++ k);
|
---|
690 |
|
---|
691 | entry = (*i).first;
|
---|
692 | data = (*i).second;
|
---|
693 | }
|
---|
694 |
|
---|
695 |
|
---|
696 | template <typename T, typename S>
|
---|
697 | float Pvs<T, S>::AddSample(T sample, const float pdf)
|
---|
698 | {
|
---|
699 | ++ mSamples;
|
---|
700 |
|
---|
701 | vector<PvsEntry<T, S> >::iterator it;
|
---|
702 | const bool entryFound = Find(sample, it);
|
---|
703 |
|
---|
704 | if (entryFound)
|
---|
705 | {
|
---|
706 | S &data = (*it).mData;
|
---|
707 | data.mSumPdf += pdf;
|
---|
708 | return data.mSumPdf;
|
---|
709 | }
|
---|
710 | else
|
---|
711 | {
|
---|
712 | PvsEntry<T, S> entry(sample, pdf);
|
---|
713 | mEntries.insert(it, entry);
|
---|
714 | ++ mLastSorted;
|
---|
715 | return pdf;
|
---|
716 | }
|
---|
717 | }
|
---|
718 |
|
---|
719 |
|
---|
720 | template <typename T, typename S>
|
---|
721 | void Pvs<T, S>::AddSampleDirty(T sample, const float pdf)
|
---|
722 | {
|
---|
723 | ++ mSamples;
|
---|
724 | mEntries.push_back(PvsEntry<T, S>(sample, pdf));
|
---|
725 | }
|
---|
726 |
|
---|
727 |
|
---|
728 | template <typename T, typename S>
|
---|
729 | typename vector< PvsEntry<T, S> >::iterator Pvs<T, S>::AddSample2(T sample,
|
---|
730 | const float pdf)
|
---|
731 | {
|
---|
732 | ++ mSamples;
|
---|
733 |
|
---|
734 | vector<PvsEntry<T, S> >::iterator it;
|
---|
735 | const bool entryFound = Find(sample, it);
|
---|
736 |
|
---|
737 | if (entryFound)
|
---|
738 | {
|
---|
739 | S &data = (*it).second;
|
---|
740 | data->mSumPdf += pdf;
|
---|
741 | }
|
---|
742 | else
|
---|
743 | {
|
---|
744 | PvsEntry<T, S> entry(sample, pdf);
|
---|
745 | mEntries.insert(it, entry);
|
---|
746 | ++ mLastSorted;
|
---|
747 | }
|
---|
748 |
|
---|
749 | return it;
|
---|
750 | }
|
---|
751 |
|
---|
752 |
|
---|
753 | /** Adds sample dirty (on the end of the vector) but
|
---|
754 | first checks if sample is already in clean part of the pvs.
|
---|
755 | */
|
---|
756 | template <typename T, typename S>
|
---|
757 | bool Pvs<T, S>::AddSampleDirtyCheck(T sample,
|
---|
758 | const float pdf)
|
---|
759 | //,float &contribution)
|
---|
760 | {
|
---|
761 | ++ mSamples;
|
---|
762 |
|
---|
763 | vector<PvsEntry<T, S> >::iterator it;
|
---|
764 | const bool entryFound = Find(sample, it);
|
---|
765 |
|
---|
766 | if (entryFound)
|
---|
767 | {
|
---|
768 | S &data = (*it).mData;
|
---|
769 |
|
---|
770 | data.mSumPdf += pdf;
|
---|
771 | //contribution = pdf / data.mSumPdf;
|
---|
772 |
|
---|
773 | return false;
|
---|
774 | }
|
---|
775 | else
|
---|
776 | {
|
---|
777 | AddSampleDirty(sample, pdf);
|
---|
778 | //contribution = 1.0f;
|
---|
779 |
|
---|
780 | return true;
|
---|
781 | }
|
---|
782 | }
|
---|
783 |
|
---|
784 |
|
---|
785 | template <typename T, typename S>
|
---|
786 | bool Pvs<T, S>::GetSampleContribution(T sample,
|
---|
787 | const float pdf,
|
---|
788 | float &contribution)
|
---|
789 | {
|
---|
790 | vector<PvsEntry<T, S> >::iterator it;
|
---|
791 | const bool entryFound = Find(sample, it);
|
---|
792 |
|
---|
793 | if (entryFound)
|
---|
794 | {
|
---|
795 | S &data = (*it).mData;
|
---|
796 | contribution = pdf / (data.mSumPdf + pdf);
|
---|
797 | return false;
|
---|
798 | }
|
---|
799 | else
|
---|
800 | {
|
---|
801 | contribution = 1.0f;
|
---|
802 | return true;
|
---|
803 | }
|
---|
804 | }
|
---|
805 |
|
---|
806 |
|
---|
807 | template <typename T, typename S>
|
---|
808 | bool Pvs<T, S>::RemoveSample(T sample, const float pdf)
|
---|
809 | {
|
---|
810 | -- mSamples;
|
---|
811 |
|
---|
812 | vector<PvsEntry<T, S> >::iterator it;
|
---|
813 | const bool entryFound = Find(sample, it);
|
---|
814 |
|
---|
815 | if (!entryFound)
|
---|
816 | return false;
|
---|
817 |
|
---|
818 | S &data = (*it).mData;
|
---|
819 |
|
---|
820 | data.mSumPdf -= pdf;
|
---|
821 |
|
---|
822 | if (data.mSumPdf <= 0.0f)
|
---|
823 | {
|
---|
824 | mEntries.erase(it);
|
---|
825 | -- mLastSorted; // wrong if sample was in tail!!
|
---|
826 | }
|
---|
827 |
|
---|
828 | return true;
|
---|
829 | }
|
---|
830 |
|
---|
831 |
|
---|
832 | template <typename T, typename S>
|
---|
833 | int Pvs<T, S>::SubtractPvs(const Pvs<T, S> &pvs)
|
---|
834 | {
|
---|
835 | const int samples = mSamples - pvs.mSamples;
|
---|
836 |
|
---|
837 | std::vector<PvsEntry<T, S> >::
|
---|
838 | const_iterator it, it_end = pvs.mEntries.end();
|
---|
839 |
|
---|
840 | // output PVS of view cell
|
---|
841 | for (it = pvs.mEntries.begin(); it != it_end; ++ it)
|
---|
842 | RemoveSample((*it).mObject, (*it).mData.mSumPdf);
|
---|
843 |
|
---|
844 | mSamples = samples;
|
---|
845 |
|
---|
846 | return GetSize();
|
---|
847 | }
|
---|
848 |
|
---|
849 |
|
---|
850 | template <typename T, typename S>
|
---|
851 | void Pvs<T, S>::CollectEntries(std::vector<T> &entries)
|
---|
852 | {
|
---|
853 | std::vector<PvsEntry<T, S> >::
|
---|
854 | const_iterator it, it_end = mEntries.end();
|
---|
855 |
|
---|
856 | // output PVS of view cell
|
---|
857 | for (it = mEntries.begin(); it != it_end; ++ it)
|
---|
858 | entries.push_back((*it)->first);
|
---|
859 | }
|
---|
860 |
|
---|
861 |
|
---|
862 | template <typename T, typename S>
|
---|
863 | void Pvs<T, S>::NormalizeMaximum()
|
---|
864 | {
|
---|
865 | std::vector<PvsEntry<T, S> >::
|
---|
866 | const_iterator it, it_end = mEntries.end();
|
---|
867 |
|
---|
868 | float maxPdfSum = -1.0f;
|
---|
869 |
|
---|
870 | // output PVS of view cell
|
---|
871 | for (it = mEntries.begin(); it != it_end; ++ it) {
|
---|
872 | float sum = (*it)->second.sumPdf;
|
---|
873 | if (sum > maxSum)
|
---|
874 | maxSum = sum;
|
---|
875 | }
|
---|
876 |
|
---|
877 | maxSum = 1.0f / maxSum;
|
---|
878 |
|
---|
879 | for (it = mEntries.begin(); it != it_end; ++ it) {
|
---|
880 | (*it)->second.sumPdf *= maxSum;
|
---|
881 | }
|
---|
882 |
|
---|
883 | }
|
---|
884 |
|
---|
885 |
|
---|
886 | template <typename T, typename S>
|
---|
887 | float Pvs<T, S>::GetEntrySize()
|
---|
888 | {
|
---|
889 | return (float)(sizeof(T) + sizeof(S)) / float(1024 * 1024);
|
---|
890 | }
|
---|
891 |
|
---|
892 |
|
---|
893 | template <typename T, typename S>
|
---|
894 | int Pvs<T, S>::GetEntrySizeByte()
|
---|
895 | {
|
---|
896 | return sizeof(T) + sizeof(S);
|
---|
897 | }
|
---|
898 |
|
---|
899 |
|
---|
900 | template <typename T, typename S>
|
---|
901 | float Pvs<T, S>::GetPvsHomogenity(Pvs<T, S> &pvs)
|
---|
902 | {
|
---|
903 | float pvsReduction, pvsEnlargement;
|
---|
904 |
|
---|
905 | ComputeContinuousPvsDifference(pvs, pvsReduction, pvsEnlargement);
|
---|
906 |
|
---|
907 | return pvsReduction + pvsEnlargement;
|
---|
908 | }
|
---|
909 |
|
---|
910 |
|
---|
911 | template <typename T, typename S>
|
---|
912 | typename PvsIterator<T, S> Pvs<T, S>::GetIterator() const
|
---|
913 | {
|
---|
914 | PvsIterator<T, S> pit(mEntries.begin(), mEntries.end());
|
---|
915 |
|
---|
916 | return pit;
|
---|
917 | }
|
---|
918 |
|
---|
919 |
|
---|
920 | ///////////////////////////////////////
|
---|
921 |
|
---|
922 | /** Class instantiating the Pvs template for kd tree nodes.
|
---|
923 | */
|
---|
924 | class KdPvs: public Pvs<KdNode *, PvsData>
|
---|
925 | {
|
---|
926 | public:
|
---|
927 | int Compress();
|
---|
928 | };
|
---|
929 |
|
---|
930 |
|
---|
931 | ////////////
|
---|
932 | //-- typedefs
|
---|
933 |
|
---|
934 | typedef PvsEntry<Intersectable *, PvsData> ObjectPvsEntry;
|
---|
935 | typedef std::vector<ObjectPvsEntry> ObjectPvsEntries;
|
---|
936 | typedef Pvs<ViewCell *, MailablePvsData> ViewCellPvs;
|
---|
937 | typedef PvsIterator<Intersectable *, PvsData> ObjectPvsIterator;
|
---|
938 |
|
---|
939 |
|
---|
940 | class ObjectPvs: public Pvs<Intersectable *, PvsData>
|
---|
941 | {
|
---|
942 | public:
|
---|
943 | /** Counts object int the pvs. Different to method "GetSize", not
|
---|
944 | only the raw container size is returned,
|
---|
945 | but the individual contributions of the entries are summed up.
|
---|
946 | */
|
---|
947 | float EvalPvsCost() const;
|
---|
948 |
|
---|
949 | friend ostream &operator<<(ostream &s, const ObjectPvs &p)
|
---|
950 | {
|
---|
951 | ObjectPvsIterator pit = p.GetIterator();
|
---|
952 |
|
---|
953 | while (pit.HasMoreEntries())
|
---|
954 | {
|
---|
955 | const ObjectPvsEntry &entry = pit.Next();
|
---|
956 | Intersectable *obj = entry.mObject;
|
---|
957 |
|
---|
958 | cout << obj << " ";
|
---|
959 | }
|
---|
960 |
|
---|
961 | return s;
|
---|
962 | }
|
---|
963 | };
|
---|
964 |
|
---|
965 |
|
---|
966 |
|
---|
967 | }
|
---|
968 |
|
---|
969 | #endif
|
---|
970 |
|
---|