1 | #ifndef _SamplingStategy_H__
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2 | #define _SamplingStategy_H__
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3 |
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4 |
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5 | namespace GtpVisibilityPreprocessor {
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6 |
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7 |
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8 | class Preprocessor;
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9 | struct SimpleRay;
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10 | class SimpleRayContainer;
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11 |
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12 | /** This class generates a specific sampling strategy.
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13 | */
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14 | class SamplingStrategy
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15 | {
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16 | public:
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17 |
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18 | /** Sample rays of particular type
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19 | */
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20 | enum
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21 | {
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22 | OBJECT_BASED_DISTRIBUTION,
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23 | DIRECTION_BASED_DISTRIBUTION,
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24 | DIRECTION_BOX_BASED_DISTRIBUTION,
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25 | SPATIAL_BOX_BASED_DISTRIBUTION,
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26 | RSS_BASED_DISTRIBUTION,
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27 | RSS_SILHOUETTE_BASED_DISTRIBUTION,
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28 | VSS_BASED_DISTRIBUTION,
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29 | OBJECT_DIRECTION_BASED_DISTRIBUTION,
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30 | OBJECTS_INTERIOR_DISTRIBUTION,
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31 | REVERSE_OBJECT_BASED_DISTRIBUTION,
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32 | VIEWCELL_BORDER_BASED_DISTRIBUTION,
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33 | VIEWSPACE_BORDER_BASED_DISTRIBUTION,
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34 | REVERSE_VIEWSPACE_BORDER_BASED_DISTRIBUTION,
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35 | GLOBAL_LINES_DISTRIBUTION
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36 | };
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37 |
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38 | /** Default constructor
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39 | */
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40 | SamplingStrategy(const Preprocessor &preprocessor);
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41 |
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42 | virtual ~SamplingStrategy();
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43 |
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44 | /** Each strategy has to implement this function.
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45 | @returns true if generated valid sample.
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46 | */
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47 |
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48 | virtual int GenerateSamples(const int number, SimpleRayContainer &rays) const;
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49 |
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50 | private:
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51 |
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52 | virtual bool GenerateSample(SimpleRay &ray) const = 0;
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53 |
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54 | public:
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55 | /// variables usefull for mixed distribution sampling
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56 | int mType;
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57 | int mRays;
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58 | float mContribution;
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59 | float mTime;
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60 | float mRatio;
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61 |
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62 | protected:
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63 |
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64 | const Preprocessor &mPreprocessor;
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65 |
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66 | };
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67 |
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68 |
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69 | class ObjectBasedDistribution: public SamplingStrategy
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70 | {
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71 | public:
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72 |
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73 | ObjectBasedDistribution(const Preprocessor &preprocessor):
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74 | SamplingStrategy(preprocessor) {
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75 | mType = OBJECT_BASED_DISTRIBUTION;
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76 | }
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77 |
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78 | private:
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79 | virtual bool GenerateSample(SimpleRay &ray) const;
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80 | };
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81 |
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82 |
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83 | class ReverseObjectBasedDistribution: public SamplingStrategy
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84 | {
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85 | public:
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86 |
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87 | ReverseObjectBasedDistribution(const Preprocessor &preprocessor):
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88 | SamplingStrategy(preprocessor) {
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89 | mType = REVERSE_OBJECT_BASED_DISTRIBUTION;
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90 | }
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91 |
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92 | private:
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93 | virtual bool GenerateSample(SimpleRay &ray) const;
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94 | };
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95 |
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96 |
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97 | class ObjectDirectionBasedDistribution: public SamplingStrategy
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98 | {
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99 | public:
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100 | ObjectDirectionBasedDistribution(const Preprocessor &preprocessor):
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101 | SamplingStrategy(preprocessor) {
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102 | mType = OBJECT_DIRECTION_BASED_DISTRIBUTION;
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103 | }
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104 | private:
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105 | virtual bool GenerateSample(SimpleRay &ray) const;
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106 | };
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107 |
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108 |
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109 | class DirectionBasedDistribution: public SamplingStrategy
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110 | {
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111 | public:
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112 | DirectionBasedDistribution(const Preprocessor &preprocessor):
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113 | SamplingStrategy(preprocessor){
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114 | mType = DIRECTION_BASED_DISTRIBUTION;
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115 | }
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116 | private:
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117 | virtual bool GenerateSample(SimpleRay &ray) const;
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118 | };
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119 |
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120 |
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121 | class DirectionBoxBasedDistribution: public SamplingStrategy
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122 | {
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123 | public:
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124 | DirectionBoxBasedDistribution(const Preprocessor &preprocessor):
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125 | SamplingStrategy(preprocessor){
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126 | mType = DIRECTION_BOX_BASED_DISTRIBUTION;
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127 | }
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128 |
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129 | private:
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130 | virtual bool GenerateSample(SimpleRay &ray) const;
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131 | };
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132 |
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133 |
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134 | class SpatialBoxBasedDistribution: public SamplingStrategy
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135 | {
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136 | public:
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137 | SpatialBoxBasedDistribution(const Preprocessor &preprocessor):
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138 | SamplingStrategy(preprocessor){
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139 | mType = DIRECTION_BOX_BASED_DISTRIBUTION;
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140 | }
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141 |
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142 | private:
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143 | virtual bool GenerateSample(SimpleRay &ray) const;
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144 | };
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145 |
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146 |
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147 | class ViewSpaceBorderBasedDistribution: public SamplingStrategy
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148 | {
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149 | public:
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150 | ViewSpaceBorderBasedDistribution(const Preprocessor &preprocessor):
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151 | SamplingStrategy(preprocessor){
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152 | mType = SPATIAL_BOX_BASED_DISTRIBUTION;
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153 | }
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154 |
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155 | private:
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156 | virtual bool GenerateSample(SimpleRay &ray) const;
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157 | };
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158 |
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159 |
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160 | class ReverseViewSpaceBorderBasedDistribution: public SamplingStrategy
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161 | {
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162 | public:
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163 | ReverseViewSpaceBorderBasedDistribution(const Preprocessor &preprocessor):
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164 | SamplingStrategy(preprocessor){
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165 | mType = SPATIAL_BOX_BASED_DISTRIBUTION;
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166 | }
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167 |
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168 | private:
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169 | virtual bool GenerateSample(SimpleRay &ray) const;
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170 | };
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171 |
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172 |
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173 | class RssBasedDistribution: public SamplingStrategy
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174 | {
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175 | public:
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176 | RssBasedDistribution(const Preprocessor &preprocessor):
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177 | SamplingStrategy(preprocessor){
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178 | mType = RSS_BASED_DISTRIBUTION;
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179 | }
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180 |
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181 |
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182 | virtual int GenerateSamples(const int number, SimpleRayContainer &ray) const {
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183 | // TBD!!!
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184 | return 0;
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185 | }
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186 |
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187 | private:
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188 | virtual bool GenerateSample(SimpleRay &ray) const;
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189 |
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190 | };
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191 |
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192 |
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193 | class ViewCellBorderBasedDistribution: public SamplingStrategy
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194 | {
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195 | public:
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196 | ViewCellBorderBasedDistribution(const Preprocessor &preprocessor):
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197 | SamplingStrategy(preprocessor) {}
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198 |
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199 | virtual bool GenerateSample(SimpleRay &ray) const;
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200 | };
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201 |
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202 | class GlobalLinesDistribution: public SamplingStrategy
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203 | {
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204 | public:
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205 | GlobalLinesDistribution(const Preprocessor &preprocessor):
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206 | SamplingStrategy(preprocessor) {
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207 | mType = GLOBAL_LINES_DISTRIBUTION;
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208 | }
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209 |
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210 | virtual bool GenerateSample(SimpleRay &ray) const;
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211 | };
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212 |
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213 |
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214 | /** This strategy generates samples inside of the objects, e.g.,
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215 | for sampling the inside of a colon.
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216 | */
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217 | /*class ObjectsInteriorDistribution: public SamplingStrategy
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218 | {
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219 | public:
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220 | ObjectsInteriorDistribution(const Preprocessor &preprocessor):
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221 | SamplingStrategy(preprocessor) {}
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222 |
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223 | virtual bool GenerateSample(SimpleRay &ray) const;
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224 | };
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225 | */
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226 | };
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227 |
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228 | #endif
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