1 | #include "DeferredRenderer.h"
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2 | #include "FrameBufferObject.h"
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3 | #include "RenderState.h"
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4 | #include "SampleGenerator.h"
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5 | #include "Vector3.h"
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6 | #include "Camera.h"
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7 | #include "shaderenv.h"
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8 | #include "Halton.h"
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9 | #include "ShadowMapping.h"
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10 | #include "Light.h"
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11 |
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12 |
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13 | using namespace std;
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14 |
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15 |
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16 | namespace CHCDemoEngine
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17 | {
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18 |
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19 | static CGprogram sCgSsaoProgram = NULL;
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20 | static CGprogram sCgGiProgram = NULL;
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21 |
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22 | static CGprogram sCgDeferredProgram = NULL;
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23 | static CGprogram sCgAntiAliasingProgram = NULL;
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24 | static CGprogram sCgDeferredShadowProgram = NULL;
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25 |
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26 | static CGparameter sColorsTexCombineParam;
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27 | static CGparameter sSsaoTexCombineParam;
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28 |
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29 | static CGparameter sColorsTexDeferredParam;
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30 | static CGparameter sPositionsTexDeferredParam;
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31 | static CGparameter sNormalsTexDeferredParam;
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32 |
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33 | static CGprogram sCgCombinedSsaoProgram = NULL;
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34 | static CGprogram sCgCombinedIllumProgram = NULL;
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35 |
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36 | static CGparameter sColorsTexLogLumParam;
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37 |
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38 |
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39 |
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40 | static CGprogram sCgInitialIntensityProgram;
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41 | static CGprogram sCgDownSampleProgram;
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42 | static CGprogram sCgToneProgram;
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43 | static CGprogram sCgLogLumProgram;
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44 |
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45 |
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46 |
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47 | ///////////////////////////////////////
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48 |
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49 |
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50 | static CGparameter sColorsTexParam;
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51 | static CGparameter sPositionsTexParam;
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52 | static CGparameter sNormalsTexParam;
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53 |
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54 | static CGparameter sOldModelViewProjMatrixParam;
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55 | static CGparameter sModelViewProjMatrixParam;
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56 | static CGparameter sMaxDepthParam;
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57 | static CGparameter sEyePosParam;
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58 | static CGparameter sSamplesParam;
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59 | static CGparameter sOldTexParam;
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60 | static CGparameter sNoiseTexParam;
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61 | static CGparameter sTemporalCoherenceParam;
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62 |
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63 |
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64 | ///////////////////////////////////////
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65 |
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66 |
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67 | static CGparameter sColorsTexGiParam;
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68 | static CGparameter sPositionsTexGiParam;
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69 | static CGparameter sNormalsTexGiParam;
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70 |
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71 |
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72 | static CGparameter sOldModelViewProjMatrixGiParam;
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73 | static CGparameter sMaxDepthGiParam;
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74 | static CGparameter sSamplesGiParam;
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75 | static CGparameter sOldSsaoTexGiParam;
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76 | static CGparameter sOldIllumTexGiParam;
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77 | static CGparameter sNoiseTexGiParam;
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78 | static CGparameter sTemporalCoherenceGiParam;
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79 |
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80 |
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81 | static CGparameter sColorsTexCombinedIllumParam;
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82 | static CGparameter sSsaoTexCombinedIllumParam;
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83 | static CGparameter sIllumTexCombinedIllumParam;
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84 |
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85 | static CGparameter sColorsTexCombinedSsaoParam;
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86 | static CGparameter sSsaoTexCombinedSsaoParam;
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87 | static CGparameter sPositionsTexCombinedSsaoParam;
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88 |
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89 | static CGparameter sTLParam;
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90 | static CGparameter sTRParam;
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91 | static CGparameter sBRParam;
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92 | static CGparameter sBLParam;
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93 |
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94 |
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95 | static CGparameter sTLGiParam;
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96 | static CGparameter sTRGiParam;
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97 | static CGparameter sBRGiParam;
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98 | static CGparameter sBLGiParam;
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99 |
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100 | static CGparameter sEyePosGiParam;
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101 |
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102 |
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103 |
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104 | ////////////
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105 |
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106 | static CGparameter sColorsTexAntiAliasingParam;
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107 | static CGparameter sNormalsTexAntiAliasingParam;
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108 |
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109 |
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110 | static CGparameter sShadowMapParam;
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111 | static CGparameter sPositionsTexShadowParam;
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112 | static CGparameter sColorsTexShadowParam;
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113 | static CGparameter sNormalsTexShadowParam;
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114 |
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115 | static CGparameter sShadowMatrixParam;
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116 | static CGparameter sMaxDepthShadowParam;
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117 | static CGparameter sSampleWidthParam;
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118 |
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119 | static CGparameter sNoiseTexShadowParam;
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120 | static CGparameter sSamplesShadowParam;
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121 |
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122 | static CGparameter sLightDirParam;
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123 | static CGparameter sLightDirShadowParam;
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124 | static CGparameter sImageKeyParam;
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125 | static CGparameter sMiddleGreyParam;
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126 | static CGparameter sWhiteLumParam;
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127 |
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128 |
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129 | static CGparameter sColorsTexInitialParam;
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130 | static CGparameter sColorsTexToneParam;
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131 | static CGparameter sIntensityTexDownSampleParam;
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132 |
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133 | //#define USE_3D_SSAO
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134 |
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135 |
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136 | static GLuint noiseTex = 0;
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137 |
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138 | // ssao random spherical samples
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139 | #ifdef USE_3D_SSAO
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140 | static Sample2 samples3[NUM_SAMPLES];
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141 | #else
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142 | static Sample2 samples2[NUM_SAMPLES];
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143 | #endif
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144 |
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145 | // number of pcf tabs
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146 | Sample2 pcfSamples[NUM_PCF_TABS];
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147 |
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148 | int DeferredRenderer::colorBufferIdx = 0;
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149 |
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150 |
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151 | static void PrintGLerror(char *msg)
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152 | {
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153 | GLenum errCode;
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154 | const GLubyte *errStr;
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155 |
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156 | if ((errCode = glGetError()) != GL_NO_ERROR)
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157 | {
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158 | errStr = gluErrorString(errCode);
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159 | fprintf(stderr,"OpenGL ERROR: %s: %s\n", errStr, msg);
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160 | }
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161 | }
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162 |
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163 |
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164 |
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165 | /** Generate poisson disc distributed sample points on the unit disc
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166 | */
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167 | static void GenerateSamples(int sampling)
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168 | {
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169 | #ifdef USE_3D_SSAO
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170 |
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171 | SphericalSampleGenerator sph(NUM_SAMPLES, 1.0f);
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172 | sph.Generate((float *)samples3);
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173 |
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174 | #else
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175 | switch (sampling)
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176 | {
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177 | case DeferredRenderer::SAMPLING_POISSON:
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178 | {
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179 | PoissonDiscSampleGenerator2 poisson(NUM_SAMPLES, 1.0f);
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180 | poisson.Generate((float *)samples2);
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181 | }
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182 | break;
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183 | case DeferredRenderer::SAMPLING_QUADRATIC:
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184 | {
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185 | QuadraticDiscSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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186 | g.Generate((float *)samples2);
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187 | }
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188 | break;
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189 | default: // SAMPLING_DEFAULT
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190 |
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191 | RandomSampleGenerator2 g(NUM_SAMPLES, 1.0f);
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192 | g.Generate((float *)samples2);
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193 | }
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194 | #endif
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195 | }
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196 |
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197 |
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198 | static void CreateNoiseTex2D(int w, int h)
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199 | {
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200 | //GLubyte *randomNormals = new GLubyte[mWidth * mHeight * 3];
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201 | float *randomNormals = new float[w * h * 3];
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202 |
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203 | static HaltonSequence halton;
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204 | float r[2];
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205 |
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206 | for (int i = 0; i < w * h * 3; i += 3)
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207 | {
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208 |
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209 | #ifdef USE_3D_SSAO
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210 | //halton.GetNext(2, r);
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211 | r[0] = RandomValue(0, 1);
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212 | r[1] = RandomValue(0, 1);
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213 |
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214 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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215 | const float phi = 2.0f * M_PI * r[1];
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216 |
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217 | randomNormals[i + 0] = sin(theta) * cos(phi);
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218 | randomNormals[i + 1] = sin(theta) * sin(phi);
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219 | randomNormals[i + 2] = cos(theta);
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220 | #else
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221 | // create random samples on a circle
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222 | r[0] = RandomValue(0, 1);
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223 | //halton.GetNext(1, r);
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224 |
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225 | const float theta = 2.0f * acos(sqrt(1.0f - r[0]));
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226 |
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227 | randomNormals[i + 0] = cos(theta);
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228 | randomNormals[i + 1] = sin(theta);
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229 | randomNormals[i + 2] = 0;
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230 | #endif
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231 | }
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232 |
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233 | glEnable(GL_TEXTURE_2D);
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234 | glGenTextures(1, &noiseTex);
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235 | glBindTexture(GL_TEXTURE_2D, noiseTex);
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236 |
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237 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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238 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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239 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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240 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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241 |
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242 | //glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, randomNormals);
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243 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGB, GL_FLOAT, randomNormals);
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244 |
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245 | glBindTexture(GL_TEXTURE_2D, 0);
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246 | glDisable(GL_TEXTURE_2D);
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247 |
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248 | delete [] randomNormals;
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249 |
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250 | cout << "created noise texture" << endl;
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251 |
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252 | PrintGLerror("noisetexture");
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253 | }
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254 |
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255 |
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256 | DeferredRenderer::DeferredRenderer(int w, int h, Camera *cam, float scaleFactor):
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257 | mWidth(w), mHeight(h),
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258 | mCamera(cam),
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259 | mScaleFactor(scaleFactor),
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260 | mUseTemporalCoherence(true),
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261 | mRegenerateSamples(true),
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262 | mSamplingMethod(SAMPLING_POISSON),
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263 | mShadingMethod(DEFAULT),
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264 | mFboIndex(0)
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265 | {
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266 | // create noise texture for ssao
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267 | CreateNoiseTex2D(w, h);
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268 |
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269 |
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270 | ///////////
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271 | //-- the flip-flop fbos
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272 |
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273 | mFbo = new FrameBufferObject(w, h, FrameBufferObject::DEPTH_NONE);
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274 |
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275 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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276 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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277 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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278 | mFbo->AddColorBuffer(ColorBufferObject::BUFFER_FLOAT_32, ColorBufferObject::WRAP_CLAMP_TO_EDGE, ColorBufferObject::FILTER_LINEAR);
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279 | }
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280 |
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281 |
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282 | DeferredRenderer::~DeferredRenderer()
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283 | {
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284 | if (sCgSsaoProgram) cgDestroyProgram(sCgSsaoProgram);
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285 | if (sCgDeferredProgram) cgDestroyProgram(sCgDeferredProgram);
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286 | if (sCgSsaoProgram) cgDestroyProgram(sCgSsaoProgram);
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287 | if (sCgGiProgram) cgDestroyProgram(sCgGiProgram);
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288 | if (sCgAntiAliasingProgram) cgDestroyProgram(sCgAntiAliasingProgram);
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289 |
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290 | DEL_PTR(mFbo);
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291 |
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292 | glDeleteTextures(1, &noiseTex);
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293 | }
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294 |
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295 |
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296 | void DeferredRenderer::SetUseTemporalCoherence(bool temporal)
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297 | {
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298 | mUseTemporalCoherence = temporal;
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299 | }
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300 |
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301 |
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302 | void DeferredRenderer::Init(CGcontext context)
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303 | {
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304 | sCgDeferredProgram =
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305 | cgCreateProgramFromFile(context,
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306 | CG_SOURCE,
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307 | "src/shaders/deferred.cg",
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308 | RenderState::sCgFragmentProfile,
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309 | "main",
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310 | NULL);
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311 |
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312 | if (sCgDeferredProgram != NULL)
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313 | {
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314 | cgGLLoadProgram(sCgDeferredProgram);
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315 |
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316 | // we need size of texture for scaling
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317 | sPositionsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "positions");
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318 | sColorsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "colors");
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319 | sNormalsTexDeferredParam = cgGetNamedParameter(sCgDeferredProgram, "normals");
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320 |
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321 | sLightDirParam = cgGetNamedParameter(sCgDeferredProgram, "lightDir");
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322 | }
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323 | else
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324 | cerr << "deferred program failed to load" << endl;
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325 |
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326 |
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327 | ///////////////
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328 |
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329 | sCgSsaoProgram =
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330 | cgCreateProgramFromFile(context,
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331 | CG_SOURCE,
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332 | #ifdef USE_3D_SSAO
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333 | "src/shaders/ssao3d.cg",
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334 | #else
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335 | "src/shaders/ssao.cg",
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336 | #endif
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337 | RenderState::sCgFragmentProfile,
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338 | "main",
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339 | NULL);
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340 |
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341 | if (sCgSsaoProgram != NULL)
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342 | {
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343 | cgGLLoadProgram(sCgSsaoProgram);
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344 |
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345 | sPositionsTexParam = cgGetNamedParameter(sCgSsaoProgram, "positions");
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346 | sColorsTexParam = cgGetNamedParameter(sCgSsaoProgram, "colors");
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347 | sEyePosParam = cgGetNamedParameter(sCgSsaoProgram, "eyePos");
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348 | sNormalsTexParam = cgGetNamedParameter(sCgSsaoProgram, "normals");
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349 | sNoiseTexParam = cgGetNamedParameter(sCgSsaoProgram, "noiseTexture");
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350 |
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351 | sOldModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "oldModelViewProj");
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352 | sModelViewProjMatrixParam = cgGetNamedParameter(sCgSsaoProgram, "mymodelViewProj");
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353 | sMaxDepthParam = cgGetNamedParameter(sCgSsaoProgram, "maxDepth");
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354 | sTemporalCoherenceParam = cgGetNamedParameter(sCgSsaoProgram, "temporalCoherence");
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355 |
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356 | sOldTexParam = cgGetNamedParameter(sCgSsaoProgram, "oldTex");
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357 | sSamplesParam = cgGetNamedParameter(sCgSsaoProgram, "samples");
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358 |
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359 | sTLParam = cgGetNamedParameter(sCgSsaoProgram, "tl");
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360 | sTRParam = cgGetNamedParameter(sCgSsaoProgram, "tr");
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361 | sBRParam = cgGetNamedParameter(sCgSsaoProgram, "br");
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362 | sBLParam = cgGetNamedParameter(sCgSsaoProgram, "bl");
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363 | }
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364 | else
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365 | cerr << "ssao program failed to load" << endl;
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366 |
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367 | sCgGiProgram =
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368 | cgCreateProgramFromFile(context,
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369 | CG_SOURCE,
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370 | "src/shaders/globillum.cg",
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371 | RenderState::sCgFragmentProfile,
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372 | "main",
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373 | NULL);
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374 |
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375 | if (sCgGiProgram != NULL)
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376 | {
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377 | cgGLLoadProgram(sCgGiProgram);
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378 |
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379 | // we need size of texture for scaling
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380 | sPositionsTexGiParam = cgGetNamedParameter(sCgGiProgram, "positions");
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381 | sColorsTexGiParam = cgGetNamedParameter(sCgGiProgram, "colors");
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382 | sNormalsTexGiParam = cgGetNamedParameter(sCgGiProgram, "normals");
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383 |
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384 | sOldModelViewProjMatrixGiParam = cgGetNamedParameter(sCgGiProgram, "oldModelViewProj");
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385 | sMaxDepthGiParam = cgGetNamedParameter(sCgGiProgram, "maxDepth");
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386 | sTemporalCoherenceGiParam = cgGetNamedParameter(sCgGiProgram, "temporalCoherence");
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387 |
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388 | sNoiseTexGiParam = cgGetNamedParameter(sCgGiProgram, "noiseTexture");
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389 | sSamplesGiParam = cgGetNamedParameter(sCgGiProgram, "samples");
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390 |
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391 | sOldSsaoTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldSsaoTex");
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392 | sOldIllumTexGiParam = cgGetNamedParameter(sCgGiProgram, "oldIllumTex");
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393 |
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394 | sTLGiParam = cgGetNamedParameter(sCgGiProgram, "tl");
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395 | sTRGiParam = cgGetNamedParameter(sCgGiProgram, "tr");
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396 | sBRGiParam = cgGetNamedParameter(sCgGiProgram, "br");
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397 | sBLGiParam = cgGetNamedParameter(sCgGiProgram, "bl");
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398 |
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399 | sEyePosGiParam = cgGetNamedParameter(sCgGiProgram, "eyePos");
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400 | }
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401 | else
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402 | cerr << "globillum program failed to load" << endl;
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403 |
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404 | sCgCombinedIllumProgram =
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405 | cgCreateProgramFromFile(context,
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406 | CG_SOURCE,
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407 | "src/shaders/globillum.cg",
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408 | RenderState::sCgFragmentProfile,
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409 | "combine",
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410 | NULL);
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411 |
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412 | if (sCgCombinedIllumProgram != NULL)
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413 | {
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414 | cgGLLoadProgram(sCgCombinedIllumProgram);
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415 |
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416 | sColorsTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "colors");
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417 | sSsaoTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "ssaoTex");
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418 | sIllumTexCombinedIllumParam = cgGetNamedParameter(sCgCombinedIllumProgram, "illumTex");
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419 | }
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420 | else
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421 | cerr << "combined illum program failed to load" << endl;
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422 |
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423 |
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424 | sCgCombinedSsaoProgram =
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425 | cgCreateProgramFromFile(context,
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426 | CG_SOURCE,
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427 | "src/shaders/ssao.cg",
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428 | RenderState::sCgFragmentProfile,
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429 | "combine",
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430 | NULL);
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431 |
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432 | if (sCgCombinedSsaoProgram != NULL)
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433 | {
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434 | cgGLLoadProgram(sCgCombinedSsaoProgram);
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435 |
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436 | sColorsTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "colors");
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437 | sSsaoTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "ssaoTex");
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438 | sPositionsTexCombinedSsaoParam = cgGetNamedParameter(sCgCombinedSsaoProgram, "positions");
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439 | }
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440 | else
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441 | cerr << "combied illum program failed to load" << endl;
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442 |
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---|
443 |
|
---|
444 | sCgAntiAliasingProgram =
|
---|
445 | cgCreateProgramFromFile(context,
|
---|
446 | CG_SOURCE,
|
---|
447 | "src/shaders/antialiasing.cg",
|
---|
448 | RenderState::sCgFragmentProfile,
|
---|
449 | "main",
|
---|
450 | NULL);
|
---|
451 |
|
---|
452 | if (sCgAntiAliasingProgram != NULL)
|
---|
453 | {
|
---|
454 | cgGLLoadProgram(sCgAntiAliasingProgram);
|
---|
455 |
|
---|
456 | sColorsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "colors");
|
---|
457 | sNormalsTexAntiAliasingParam = cgGetNamedParameter(sCgAntiAliasingProgram, "normals");
|
---|
458 | }
|
---|
459 | else
|
---|
460 | cerr << "antialiasing program failed to load" << endl;
|
---|
461 |
|
---|
462 | sCgDeferredShadowProgram =
|
---|
463 | cgCreateProgramFromFile(context,
|
---|
464 | CG_SOURCE,
|
---|
465 | "src/shaders/deferred.cg",
|
---|
466 | RenderState::sCgFragmentProfile,
|
---|
467 | "main_shadow",
|
---|
468 | NULL);
|
---|
469 |
|
---|
470 | if (sCgDeferredShadowProgram != NULL)
|
---|
471 | {
|
---|
472 | cgGLLoadProgram(sCgDeferredShadowProgram);
|
---|
473 |
|
---|
474 | // we need size of texture for scaling
|
---|
475 | sPositionsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "positions");
|
---|
476 | sColorsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "colors");
|
---|
477 | sNormalsTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "normals");
|
---|
478 |
|
---|
479 | sShadowMapParam = cgGetNamedParameter(sCgDeferredShadowProgram, "shadowMap");
|
---|
480 | sMaxDepthShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "maxDepth");
|
---|
481 | sSampleWidthParam = cgGetNamedParameter(sCgDeferredShadowProgram, "sampleWidth");
|
---|
482 | sShadowMatrixParam = cgGetNamedParameter(sCgDeferredShadowProgram, "shadowMatrix");
|
---|
483 |
|
---|
484 | sNoiseTexShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "noiseTexture");
|
---|
485 | sSamplesShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "samples");
|
---|
486 | sLightDirShadowParam = cgGetNamedParameter(sCgDeferredShadowProgram, "lightDir");
|
---|
487 |
|
---|
488 | PoissonDiscSampleGenerator2 poisson(NUM_PCF_TABS, 1.0f);
|
---|
489 | poisson.Generate((float *)pcfSamples);
|
---|
490 |
|
---|
491 | cgGLSetParameterArray2f(sSamplesShadowParam, 0, NUM_PCF_TABS, (const float *)pcfSamples);
|
---|
492 | }
|
---|
493 | else
|
---|
494 | cerr << "deferred program failed to load" << endl;
|
---|
495 |
|
---|
496 | sCgLogLumProgram =
|
---|
497 | cgCreateProgramFromFile(context,
|
---|
498 | CG_SOURCE,
|
---|
499 | "src/shaders/tonemap.cg",
|
---|
500 | RenderState::sCgFragmentProfile,
|
---|
501 | "CalcAvgLogLum",
|
---|
502 | NULL);
|
---|
503 |
|
---|
504 | if (sCgLogLumProgram != NULL)
|
---|
505 | {
|
---|
506 | cgGLLoadProgram(sCgLogLumProgram);
|
---|
507 | sColorsTexLogLumParam = cgGetNamedParameter(sCgLogLumProgram, "colors");
|
---|
508 | }
|
---|
509 | else
|
---|
510 | cerr << "avg loglum program failed to load" << endl;
|
---|
511 |
|
---|
512 |
|
---|
513 | sCgToneProgram =
|
---|
514 | cgCreateProgramFromFile(context,
|
---|
515 | CG_SOURCE,
|
---|
516 | "src/shaders/tonemap.cg",
|
---|
517 | RenderState::sCgFragmentProfile,
|
---|
518 | "ToneMap",
|
---|
519 | NULL);
|
---|
520 |
|
---|
521 | if (sCgToneProgram != NULL)
|
---|
522 | {
|
---|
523 | cgGLLoadProgram(sCgToneProgram);
|
---|
524 |
|
---|
525 | sImageKeyParam = cgGetNamedParameter(sCgToneProgram, "imageKey");
|
---|
526 | sMiddleGreyParam = cgGetNamedParameter(sCgToneProgram, "middleGrey");
|
---|
527 | sWhiteLumParam = cgGetNamedParameter(sCgToneProgram, "whiteLum");
|
---|
528 |
|
---|
529 | sColorsTexToneParam = cgGetNamedParameter(sCgToneProgram, "colors");
|
---|
530 | }
|
---|
531 | else
|
---|
532 | cerr << "tone program failed to load" << endl;
|
---|
533 |
|
---|
534 | /*
|
---|
535 | sCgInitialIntensityProgram =
|
---|
536 | cgCreateProgramFromFile(context,
|
---|
537 | CG_SOURCE,
|
---|
538 | "src/shaders/tonemap.cg",
|
---|
539 | RenderState::sCgFragmentProfile,
|
---|
540 | "GreyScaleDownSample",
|
---|
541 | NULL);
|
---|
542 |
|
---|
543 | if (sCgInitialIntensityProgram != NULL)
|
---|
544 | {
|
---|
545 | cgGLLoadProgram(sCgInitialIntensityProgram);
|
---|
546 |
|
---|
547 | // we need size of texture for scaling
|
---|
548 | sColorsTexInitialParam = cgGetNamedParameter(sCgInitialIntensityProgram, "colors");
|
---|
549 | }
|
---|
550 | else
|
---|
551 | cerr << "intensity program failed to load" << endl;
|
---|
552 |
|
---|
553 | */
|
---|
554 |
|
---|
555 | PrintGLerror("init");
|
---|
556 | }
|
---|
557 |
|
---|
558 |
|
---|
559 | void DeferredRenderer::Render(FrameBufferObject *fbo,
|
---|
560 | const Matrix4x4 &oldProjViewMatrix,
|
---|
561 | const Matrix4x4 &projViewMatrix,
|
---|
562 | float tempCohFactor,
|
---|
563 | DirectionalLight *light,
|
---|
564 | bool useToneMapping,
|
---|
565 | ShadowMap *shadowMap
|
---|
566 | )
|
---|
567 | {
|
---|
568 | // switch roles of old and new fbo
|
---|
569 | // the algorihm uses two input fbos, where the one
|
---|
570 | // contais the color buffer from the last frame,
|
---|
571 | // the other one will be written
|
---|
572 |
|
---|
573 | mFboIndex = 2 - mFboIndex;
|
---|
574 |
|
---|
575 | FrameBufferObject::Release();
|
---|
576 |
|
---|
577 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
578 |
|
---|
579 | glDisable(GL_ALPHA_TEST);
|
---|
580 | glDisable(GL_TEXTURE_2D);
|
---|
581 | glDisable(GL_LIGHTING);
|
---|
582 |
|
---|
583 | glPushAttrib(GL_VIEWPORT_BIT);
|
---|
584 | glViewport(0, 0, mWidth, mHeight);
|
---|
585 |
|
---|
586 | glMatrixMode(GL_PROJECTION);
|
---|
587 | glPushMatrix();
|
---|
588 | glLoadIdentity();
|
---|
589 |
|
---|
590 | const float offs = 0.5f;
|
---|
591 | glOrtho(-offs, offs, -offs, offs, 0, 1);
|
---|
592 |
|
---|
593 | glMatrixMode(GL_MODELVIEW);
|
---|
594 | glPushMatrix();
|
---|
595 | glLoadIdentity();
|
---|
596 |
|
---|
597 | if (shadowMap)
|
---|
598 | FirstPassShadow(fbo, light, shadowMap);
|
---|
599 | else
|
---|
600 | FirstPass(fbo, light);
|
---|
601 |
|
---|
602 | switch (mShadingMethod)
|
---|
603 | {
|
---|
604 | case SSAO:
|
---|
605 | ComputeSsao(fbo, tempCohFactor, oldProjViewMatrix, projViewMatrix);
|
---|
606 | CombineSsao(fbo);
|
---|
607 | break;
|
---|
608 | case GI:
|
---|
609 | ComputeGlobIllum(fbo, tempCohFactor, oldProjViewMatrix);
|
---|
610 | CombineIllum(fbo);
|
---|
611 | break;
|
---|
612 | default: // DEFAULT
|
---|
613 | // do nothing: standard deferred shading
|
---|
614 | break;
|
---|
615 | }
|
---|
616 |
|
---|
617 | if (useToneMapping)
|
---|
618 | {
|
---|
619 | float imageKey, whiteLum, middleGrey;
|
---|
620 |
|
---|
621 | ComputeToneParameters(fbo, light, imageKey, whiteLum, middleGrey);
|
---|
622 | ToneMap(fbo, light, imageKey, whiteLum, middleGrey);
|
---|
623 | }
|
---|
624 |
|
---|
625 | AntiAliasing(fbo, light);
|
---|
626 |
|
---|
627 | glEnable(GL_LIGHTING);
|
---|
628 | glDisable(GL_TEXTURE_2D);
|
---|
629 |
|
---|
630 | glMatrixMode(GL_PROJECTION);
|
---|
631 | glPopMatrix();
|
---|
632 |
|
---|
633 | glMatrixMode(GL_MODELVIEW);
|
---|
634 | glPopMatrix();
|
---|
635 |
|
---|
636 | glPopAttrib();
|
---|
637 |
|
---|
638 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
639 | }
|
---|
640 |
|
---|
641 |
|
---|
642 | void DeferredRenderer::ComputeSsao(FrameBufferObject *fbo,
|
---|
643 | float tempCohFactor,
|
---|
644 | const Matrix4x4 &oldProjViewMatrix,
|
---|
645 | const Matrix4x4 &projViewMatrix
|
---|
646 | )
|
---|
647 | {
|
---|
648 | #ifdef USE_3D_SSAO
|
---|
649 | // bias from [-1, 1] to [0, 1]
|
---|
650 | static Matrix4x4 biasMatrix(0.5f, 0.0f, 0.0f, 0.5f,
|
---|
651 | 0.0f, 0.5f, 0.0f, 0.5f,
|
---|
652 | 0.0f, 0.0f, 0.5f, 0.5f,
|
---|
653 | 0.0f, 0.0f, 0.0f, 1.0f);
|
---|
654 |
|
---|
655 | Matrix4x4 m = projViewMatrix * biasMatrix;
|
---|
656 |
|
---|
657 | cgGLSetMatrixParameterfc(sModelViewProjMatrixParam, (const float *)m.x);
|
---|
658 | #endif
|
---|
659 |
|
---|
660 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixParam, (const float *)oldProjViewMatrix.x);
|
---|
661 |
|
---|
662 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
663 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
664 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
665 |
|
---|
666 | // generate mip map levels of position in order to improve texture lookup performance
|
---|
667 | //glBindTexture(GL_TEXTURE_2D, positionsTex); glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
668 | //glBindTexture(GL_TEXTURE_2D, colorsTex); glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
669 |
|
---|
670 | // read the second buffer, write to the first buffer
|
---|
671 | mFbo->Bind();
|
---|
672 | glDrawBuffers(1, mrt + mFboIndex);
|
---|
673 |
|
---|
674 | GLuint oldTex = mFbo->GetColorBuffer(2 - mFboIndex)->GetTexture();
|
---|
675 |
|
---|
676 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
677 |
|
---|
678 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
679 | cgGLBindProgram(sCgSsaoProgram);
|
---|
680 |
|
---|
681 | cgGLSetTextureParameter(sPositionsTexParam, positionsTex);
|
---|
682 | cgGLEnableTextureParameter(sPositionsTexParam);
|
---|
683 |
|
---|
684 | cgGLSetTextureParameter(sColorsTexParam, colorsTex);
|
---|
685 | cgGLEnableTextureParameter(sColorsTexParam);
|
---|
686 |
|
---|
687 | cgGLSetTextureParameter(sNormalsTexParam, normalsTex);
|
---|
688 | cgGLEnableTextureParameter(sNormalsTexParam);
|
---|
689 |
|
---|
690 | cgGLSetTextureParameter(sNoiseTexParam, noiseTex);
|
---|
691 | cgGLEnableTextureParameter(sNoiseTexParam);
|
---|
692 |
|
---|
693 | cgGLSetTextureParameter(sOldTexParam, oldTex);
|
---|
694 | cgGLEnableTextureParameter(sOldTexParam);
|
---|
695 |
|
---|
696 | cgGLSetParameter1f(sMaxDepthParam, mScaleFactor);
|
---|
697 |
|
---|
698 | Vector3 pos = mCamera->GetPosition() / mScaleFactor;
|
---|
699 | cgGLSetParameter3f(sEyePosParam, pos.x, pos.y, pos.z);
|
---|
700 |
|
---|
701 | cgGLSetParameter1f(sTemporalCoherenceParam, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
702 |
|
---|
703 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
704 | {
|
---|
705 | mRegenerateSamples = false;
|
---|
706 |
|
---|
707 | // q: should we generate new samples or only rotate the old ones?
|
---|
708 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
709 | // needs longer to converge
|
---|
710 | GenerateSamples(mSamplingMethod);
|
---|
711 |
|
---|
712 | #ifdef USE_3D_SSAO
|
---|
713 | cgGLSetParameterArray3f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples3);
|
---|
714 | #else
|
---|
715 | cgGLSetParameterArray2f(sSamplesParam, 0, NUM_SAMPLES, (const float *)samples2);
|
---|
716 | #endif
|
---|
717 | }
|
---|
718 |
|
---|
719 | Vector3 tl, tr, bl, br;
|
---|
720 | ComputeViewVectors(tl, tr, bl, br);
|
---|
721 |
|
---|
722 | cgGLSetParameter3f(sBLParam, bl.x, bl.y, bl.z);
|
---|
723 | cgGLSetParameter3f(sBRParam, br.x, br.y, br.z);
|
---|
724 | cgGLSetParameter3f(sTLParam, tl.x, tl.y, tl.z);
|
---|
725 | cgGLSetParameter3f(sTRParam, tr.x, tr.y, tr.z);
|
---|
726 |
|
---|
727 |
|
---|
728 | glBegin(GL_QUADS);
|
---|
729 |
|
---|
730 | // note: slightly larger texture could hide ambient occlusion error on border but costs resolution
|
---|
731 | const float offs = 0.5f;
|
---|
732 |
|
---|
733 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-offs, -offs, -0.5f);
|
---|
734 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( offs, -offs, -0.5f);
|
---|
735 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( offs, offs, -0.5f);
|
---|
736 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-offs, offs, -0.5f);
|
---|
737 |
|
---|
738 | glEnd();
|
---|
739 |
|
---|
740 | cgGLDisableTextureParameter(sColorsTexParam);
|
---|
741 | cgGLDisableTextureParameter(sPositionsTexParam);
|
---|
742 | cgGLDisableTextureParameter(sNormalsTexParam);
|
---|
743 | cgGLDisableTextureParameter(sNoiseTexParam);
|
---|
744 | cgGLDisableTextureParameter(sOldTexParam);
|
---|
745 |
|
---|
746 |
|
---|
747 | FrameBufferObject::Release();
|
---|
748 |
|
---|
749 | PrintGLerror("ssao first pass");
|
---|
750 | }
|
---|
751 |
|
---|
752 |
|
---|
753 | void DeferredRenderer::ComputeViewVectors(Vector3 &tl, Vector3 &tr, Vector3 &bl, Vector3 &br)
|
---|
754 | {
|
---|
755 | Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
|
---|
756 |
|
---|
757 | mCamera->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
|
---|
758 |
|
---|
759 | bl = Normalize(nbl - fbl);
|
---|
760 | br = Normalize(nbr - fbr);
|
---|
761 | tl = Normalize(ntl - ftl);
|
---|
762 | tr = Normalize(ntr - ftr);
|
---|
763 | }
|
---|
764 |
|
---|
765 |
|
---|
766 | static void SetVertex(float x, float y, float x_offs, float y_offs)
|
---|
767 | {
|
---|
768 | glMultiTexCoord2fARB(GL_TEXTURE0_ARB, x, y); // center
|
---|
769 | glMultiTexCoord2fARB(GL_TEXTURE1_ARB, x - x_offs, y + y_offs); // left top
|
---|
770 | glMultiTexCoord2fARB(GL_TEXTURE2_ARB, x + x_offs, y - y_offs); // right bottom
|
---|
771 | glMultiTexCoord2fARB(GL_TEXTURE3_ARB, x + x_offs, y + y_offs); // right top
|
---|
772 | glMultiTexCoord2fARB(GL_TEXTURE4_ARB, x - x_offs, y - y_offs); // left bottom
|
---|
773 |
|
---|
774 | glMultiTexCoord4fARB(GL_TEXTURE5_ARB, x - x_offs, y, x + x_offs, y); // left right
|
---|
775 | glMultiTexCoord4fARB(GL_TEXTURE6_ARB, x, y + y_offs, x, y - y_offs); // top bottom
|
---|
776 |
|
---|
777 | glVertex3f(x - 0.5f, y - 0.5f, -0.5f);
|
---|
778 | }
|
---|
779 |
|
---|
780 |
|
---|
781 | void DeferredRenderer::AntiAliasing(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
782 | {
|
---|
783 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
784 |
|
---|
785 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
786 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
787 |
|
---|
788 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
789 |
|
---|
790 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
791 | cgGLBindProgram(sCgAntiAliasingProgram);
|
---|
792 |
|
---|
793 | cgGLSetTextureParameter(sColorsTexAntiAliasingParam, colorsTex);
|
---|
794 | cgGLEnableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
795 |
|
---|
796 | cgGLSetTextureParameter(sNormalsTexAntiAliasingParam, normalsTex);
|
---|
797 | cgGLEnableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
798 |
|
---|
799 |
|
---|
800 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
801 |
|
---|
802 | glBegin(GL_QUADS);
|
---|
803 |
|
---|
804 | // the neighbouring texels
|
---|
805 | float x_offs = 1.0f / mWidth;
|
---|
806 | float y_offs = 1.0f / mHeight;
|
---|
807 |
|
---|
808 | SetVertex(0, 0, x_offs, y_offs);
|
---|
809 | SetVertex(1, 0, x_offs, y_offs);
|
---|
810 | SetVertex(1, 1, x_offs, y_offs);
|
---|
811 | SetVertex(0, 1, x_offs, y_offs);
|
---|
812 |
|
---|
813 | glEnd();
|
---|
814 |
|
---|
815 | cgGLDisableTextureParameter(sColorsTexAntiAliasingParam);
|
---|
816 | cgGLDisableTextureParameter(sNormalsTexAntiAliasingParam);
|
---|
817 |
|
---|
818 | PrintGLerror("antialiasing");
|
---|
819 | }
|
---|
820 |
|
---|
821 |
|
---|
822 | void DeferredRenderer::FirstPass(FrameBufferObject *fbo, DirectionalLight *light)
|
---|
823 | {
|
---|
824 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
825 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
826 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
827 |
|
---|
828 | fbo->Bind();
|
---|
829 |
|
---|
830 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
831 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
832 |
|
---|
833 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
834 |
|
---|
835 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
836 |
|
---|
837 | cgGLBindProgram(sCgDeferredProgram);
|
---|
838 |
|
---|
839 | cgGLSetTextureParameter(sColorsTexDeferredParam, colorsTex);
|
---|
840 | cgGLEnableTextureParameter(sColorsTexDeferredParam);
|
---|
841 |
|
---|
842 | cgGLSetTextureParameter(sPositionsTexDeferredParam, positionsTex);
|
---|
843 | cgGLEnableTextureParameter(sPositionsTexDeferredParam);
|
---|
844 |
|
---|
845 | cgGLSetTextureParameter(sNormalsTexDeferredParam, normalsTex);
|
---|
846 | cgGLEnableTextureParameter(sNormalsTexDeferredParam);
|
---|
847 |
|
---|
848 | Vector3 lightDir = -light->GetDirection();
|
---|
849 | cgGLSetParameter3f(sLightDirParam, lightDir.x, lightDir.y, lightDir.z);
|
---|
850 |
|
---|
851 |
|
---|
852 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
853 |
|
---|
854 | const float offs = 0.5f;
|
---|
855 |
|
---|
856 | glBegin(GL_QUADS);
|
---|
857 |
|
---|
858 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
859 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
860 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
861 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
862 |
|
---|
863 | glEnd();
|
---|
864 |
|
---|
865 | cgGLDisableTextureParameter(sColorsTexDeferredParam);
|
---|
866 | cgGLDisableTextureParameter(sPositionsTexDeferredParam);
|
---|
867 | cgGLDisableTextureParameter(sNormalsTexDeferredParam);
|
---|
868 |
|
---|
869 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
870 |
|
---|
871 | FrameBufferObject::Release();
|
---|
872 |
|
---|
873 | PrintGLerror("deferred shading");
|
---|
874 | }
|
---|
875 |
|
---|
876 |
|
---|
877 |
|
---|
878 | void DeferredRenderer::ComputeGlobIllum(FrameBufferObject *fbo,
|
---|
879 | float tempCohFactor,
|
---|
880 | const Matrix4x4 &oldProjViewMatrix)
|
---|
881 | {
|
---|
882 | cgGLSetMatrixParameterfc(sOldModelViewProjMatrixGiParam, (const float *)oldProjViewMatrix.x);
|
---|
883 |
|
---|
884 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
885 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
886 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
887 |
|
---|
888 | // generate mip map levels for position texture
|
---|
889 | //glBindTexture(GL_TEXTURE_2D, positionsTex); glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
890 |
|
---|
891 | // read the second buffer, write to the first buffer
|
---|
892 | mFbo->Bind();
|
---|
893 |
|
---|
894 | glDrawBuffers(2, mrt + mFboIndex);
|
---|
895 |
|
---|
896 | GLuint oldSsaoTex = mFbo->GetColorBuffer(2 - mFboIndex)->GetTexture();
|
---|
897 | GLuint oldIllumTex = mFbo->GetColorBuffer(2 - mFboIndex + 1)->GetTexture();
|
---|
898 |
|
---|
899 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
900 |
|
---|
901 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
902 | cgGLBindProgram(sCgGiProgram);
|
---|
903 |
|
---|
904 | cgGLSetTextureParameter(sPositionsTexGiParam, positionsTex);
|
---|
905 | cgGLEnableTextureParameter(sPositionsTexGiParam);
|
---|
906 |
|
---|
907 | cgGLSetTextureParameter(sColorsTexGiParam, colorsTex);
|
---|
908 | cgGLEnableTextureParameter(sColorsTexGiParam);
|
---|
909 |
|
---|
910 | cgGLSetTextureParameter(sNormalsTexGiParam, normalsTex);
|
---|
911 | cgGLEnableTextureParameter(sNormalsTexGiParam);
|
---|
912 |
|
---|
913 | cgGLSetTextureParameter(sNoiseTexGiParam, noiseTex);
|
---|
914 | cgGLEnableTextureParameter(sNoiseTexGiParam);
|
---|
915 |
|
---|
916 | cgGLSetTextureParameter(sOldSsaoTexGiParam, oldSsaoTex);
|
---|
917 | cgGLEnableTextureParameter(sOldSsaoTexGiParam);
|
---|
918 |
|
---|
919 | cgGLSetTextureParameter(sOldIllumTexGiParam, oldIllumTex);
|
---|
920 | cgGLEnableTextureParameter(sOldIllumTexGiParam);
|
---|
921 |
|
---|
922 | cgGLSetParameter1f(sMaxDepthGiParam, mScaleFactor);
|
---|
923 |
|
---|
924 |
|
---|
925 | cgGLSetParameter1f(sTemporalCoherenceGiParam, (mUseTemporalCoherence && !mRegenerateSamples) ? tempCohFactor : 0);
|
---|
926 |
|
---|
927 |
|
---|
928 | if (mUseTemporalCoherence || mRegenerateSamples)
|
---|
929 | {
|
---|
930 | mRegenerateSamples = false;
|
---|
931 |
|
---|
932 | // q: should we generate new samples or only rotate the old ones?
|
---|
933 | // in the first case, the sample patterns look nicer, but the kernel
|
---|
934 | // needs longer to converge
|
---|
935 | GenerateSamples(mSamplingMethod);
|
---|
936 |
|
---|
937 | #ifdef USE_3D_SSAO
|
---|
938 | cgGLSetParameterArray3f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples3);
|
---|
939 | #else
|
---|
940 | cgGLSetParameterArray2f(sSamplesGiParam, 0, NUM_SAMPLES, (const float *)samples2);
|
---|
941 | #endif
|
---|
942 | }
|
---|
943 |
|
---|
944 |
|
---|
945 | Vector3 tl, tr, bl, br;
|
---|
946 | ComputeViewVectors(tl, tr, bl, br);
|
---|
947 |
|
---|
948 | const Vector3 pos = mCamera->GetPosition() / mScaleFactor;
|
---|
949 | cgGLSetParameter3f(sEyePosGiParam, pos.x, pos.y, pos.z);
|
---|
950 |
|
---|
951 | cgGLSetParameter3f(sBLGiParam, bl.x, bl.y, bl.z);
|
---|
952 | cgGLSetParameter3f(sBRGiParam, br.x, br.y, br.z);
|
---|
953 | cgGLSetParameter3f(sTLGiParam, tl.x, tl.y, tl.z);
|
---|
954 | cgGLSetParameter3f(sTRGiParam, tr.x, tr.y, tr.z);
|
---|
955 |
|
---|
956 |
|
---|
957 | glBegin(GL_QUADS);
|
---|
958 |
|
---|
959 | // note: slightly larger texture hides ambient occlusion error on border but costs resolution
|
---|
960 | //const float new_offs = 0.55f;
|
---|
961 | const float new_offs = 0.5f;
|
---|
962 |
|
---|
963 | glTexCoord2f(0, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, bl.x, bl.y, bl.z); glVertex3f(-new_offs, -new_offs, -0.5f);
|
---|
964 | glTexCoord2f(1, 0); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, br.x, br.y, br.z); glVertex3f( new_offs, -new_offs, -0.5f);
|
---|
965 | glTexCoord2f(1, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tr.x, tr.y, tr.z); glVertex3f( new_offs, new_offs, -0.5f);
|
---|
966 | glTexCoord2f(0, 1); glMultiTexCoord3fARB(GL_TEXTURE1_ARB, tl.x, tl.y, tl.z); glVertex3f(-new_offs, new_offs, -0.5f);
|
---|
967 |
|
---|
968 | glEnd();
|
---|
969 |
|
---|
970 | cgGLDisableTextureParameter(sColorsTexGiParam);
|
---|
971 | cgGLDisableTextureParameter(sPositionsTexGiParam);
|
---|
972 | cgGLDisableTextureParameter(sNormalsTexGiParam);
|
---|
973 | cgGLDisableTextureParameter(sNoiseTexGiParam);
|
---|
974 | cgGLDisableTextureParameter(sOldSsaoTexGiParam);
|
---|
975 | cgGLDisableTextureParameter(sOldIllumTexGiParam);
|
---|
976 |
|
---|
977 | FrameBufferObject::Release();
|
---|
978 |
|
---|
979 | PrintGLerror("globillum first pass");
|
---|
980 | }
|
---|
981 |
|
---|
982 |
|
---|
983 | void DeferredRenderer::CombineIllum(FrameBufferObject *fbo)
|
---|
984 | {
|
---|
985 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
986 |
|
---|
987 | GLuint ssaoTex = mFbo->GetColorBuffer(mFboIndex)->GetTexture();
|
---|
988 | GLuint illumTex = mFbo->GetColorBuffer(mFboIndex + 1)->GetTexture();
|
---|
989 |
|
---|
990 |
|
---|
991 | fbo->Bind();
|
---|
992 |
|
---|
993 | // overwrite old color texture
|
---|
994 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
995 |
|
---|
996 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
997 |
|
---|
998 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
999 |
|
---|
1000 | cgGLBindProgram(sCgCombinedIllumProgram);
|
---|
1001 |
|
---|
1002 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
1003 |
|
---|
1004 |
|
---|
1005 | cgGLSetTextureParameter(sColorsTexCombinedIllumParam, colorsTex);
|
---|
1006 | cgGLEnableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
1007 |
|
---|
1008 | cgGLSetTextureParameter(sSsaoTexCombinedIllumParam, ssaoTex);
|
---|
1009 | cgGLEnableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
1010 |
|
---|
1011 | cgGLSetTextureParameter(sIllumTexCombinedIllumParam, illumTex);
|
---|
1012 | cgGLEnableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
1013 |
|
---|
1014 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1015 |
|
---|
1016 | const float offs = 0.5f;
|
---|
1017 |
|
---|
1018 | glBegin(GL_QUADS);
|
---|
1019 |
|
---|
1020 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1021 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1022 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1023 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1024 |
|
---|
1025 | glEnd();
|
---|
1026 |
|
---|
1027 | cgGLDisableTextureParameter(sColorsTexCombinedIllumParam);
|
---|
1028 | cgGLDisableTextureParameter(sSsaoTexCombinedIllumParam);
|
---|
1029 | cgGLDisableTextureParameter(sIllumTexCombinedIllumParam);
|
---|
1030 |
|
---|
1031 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
1032 |
|
---|
1033 | FrameBufferObject::Release();
|
---|
1034 |
|
---|
1035 | PrintGLerror("combine");
|
---|
1036 | }
|
---|
1037 |
|
---|
1038 |
|
---|
1039 | void DeferredRenderer::CombineSsao(FrameBufferObject *fbo)
|
---|
1040 | {
|
---|
1041 | fbo->Bind();
|
---|
1042 |
|
---|
1043 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
1044 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
1045 | GLuint ssaoTex = mFbo->GetColorBuffer(mFboIndex)->GetTexture();
|
---|
1046 |
|
---|
1047 | // overwrite old color texture
|
---|
1048 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1049 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1050 |
|
---|
1051 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
1052 |
|
---|
1053 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
1054 |
|
---|
1055 | cgGLBindProgram(sCgCombinedSsaoProgram);
|
---|
1056 |
|
---|
1057 | cgGLSetTextureParameter(sColorsTexCombinedSsaoParam, colorsTex);
|
---|
1058 | cgGLEnableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
1059 |
|
---|
1060 | cgGLSetTextureParameter(sSsaoTexCombinedSsaoParam, ssaoTex);
|
---|
1061 | cgGLEnableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
1062 |
|
---|
1063 | cgGLSetTextureParameter(sPositionsTexCombinedSsaoParam, positionsTex);
|
---|
1064 | cgGLEnableTextureParameter(sPositionsTexCombinedSsaoParam);
|
---|
1065 |
|
---|
1066 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1067 |
|
---|
1068 | const float offs = 0.5f;
|
---|
1069 |
|
---|
1070 | glBegin(GL_QUADS);
|
---|
1071 |
|
---|
1072 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1073 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1074 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1075 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1076 |
|
---|
1077 | glEnd();
|
---|
1078 |
|
---|
1079 | cgGLDisableTextureParameter(sColorsTexCombinedSsaoParam);
|
---|
1080 | cgGLDisableTextureParameter(sSsaoTexCombinedSsaoParam);
|
---|
1081 | cgGLDisableTextureParameter(sPositionsTexCombinedSsaoParam);
|
---|
1082 |
|
---|
1083 | cgGLDisableProfile(RenderState::sCgFragmentProfile);
|
---|
1084 |
|
---|
1085 | FrameBufferObject::Release();
|
---|
1086 |
|
---|
1087 | PrintGLerror("combine ssao");
|
---|
1088 | }
|
---|
1089 |
|
---|
1090 |
|
---|
1091 | void DeferredRenderer::FirstPassShadow(FrameBufferObject *fbo,
|
---|
1092 | DirectionalLight *light,
|
---|
1093 | ShadowMap *shadowMap)
|
---|
1094 | {
|
---|
1095 | fbo->Bind();
|
---|
1096 |
|
---|
1097 | GLuint colorsTex = fbo->GetColorBuffer(colorBufferIdx)->GetTexture();
|
---|
1098 |
|
---|
1099 | GLuint positionsTex = fbo->GetColorBuffer(1)->GetTexture();
|
---|
1100 | GLuint normalsTex = fbo->GetColorBuffer(2)->GetTexture();
|
---|
1101 | GLuint shadowTex = shadowMap->GetDepthTexture();
|
---|
1102 |
|
---|
1103 | Matrix4x4 shadowMatrix;
|
---|
1104 | shadowMap->GetTextureMatrix(shadowMatrix);
|
---|
1105 |
|
---|
1106 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1107 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1108 |
|
---|
1109 |
|
---|
1110 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
1111 |
|
---|
1112 | cgGLBindProgram(sCgDeferredShadowProgram);
|
---|
1113 |
|
---|
1114 | cgGLSetTextureParameter(sColorsTexShadowParam, colorsTex);
|
---|
1115 | cgGLEnableTextureParameter(sColorsTexShadowParam);
|
---|
1116 |
|
---|
1117 | cgGLSetTextureParameter(sPositionsTexShadowParam, positionsTex);
|
---|
1118 | cgGLEnableTextureParameter(sPositionsTexShadowParam);
|
---|
1119 |
|
---|
1120 | cgGLSetTextureParameter(sNormalsTexShadowParam, normalsTex);
|
---|
1121 | cgGLEnableTextureParameter(sNormalsTexShadowParam);
|
---|
1122 |
|
---|
1123 | cgGLSetTextureParameter(sShadowMapParam, shadowTex);
|
---|
1124 | cgGLEnableTextureParameter(sShadowMapParam);
|
---|
1125 |
|
---|
1126 | cgGLSetParameter1f(sMaxDepthShadowParam, mScaleFactor);
|
---|
1127 |
|
---|
1128 | cgGLSetParameter1f(sSampleWidthParam, 2.0f / shadowMap->GetSize());
|
---|
1129 |
|
---|
1130 |
|
---|
1131 | cgGLSetMatrixParameterfc(sShadowMatrixParam, (const float *)shadowMatrix.x);
|
---|
1132 |
|
---|
1133 | cgGLSetTextureParameter(sNoiseTexShadowParam, noiseTex);
|
---|
1134 | cgGLEnableTextureParameter(sNoiseTexShadowParam);
|
---|
1135 |
|
---|
1136 | Vector3 lightDir = -light->GetDirection();
|
---|
1137 | cgGLSetParameter3f(sLightDirShadowParam, lightDir.x, lightDir.y, lightDir.z);
|
---|
1138 |
|
---|
1139 |
|
---|
1140 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1141 |
|
---|
1142 | glBegin(GL_QUADS);
|
---|
1143 |
|
---|
1144 | float offs2 = 0.5f;
|
---|
1145 |
|
---|
1146 | glTexCoord2f(0, 0); glVertex3f(-offs2, -offs2, -0.5f);
|
---|
1147 | glTexCoord2f(1, 0); glVertex3f( offs2, -offs2, -0.5f);
|
---|
1148 | glTexCoord2f(1, 1); glVertex3f( offs2, offs2, -0.5f);
|
---|
1149 | glTexCoord2f(0, 1); glVertex3f(-offs2, offs2, -0.5f);
|
---|
1150 |
|
---|
1151 | glEnd();
|
---|
1152 |
|
---|
1153 | cgGLDisableTextureParameter(sColorsTexShadowParam);
|
---|
1154 | cgGLDisableTextureParameter(sPositionsTexShadowParam);
|
---|
1155 | cgGLDisableTextureParameter(sNormalsTexShadowParam);
|
---|
1156 | cgGLDisableTextureParameter(sShadowMapParam);
|
---|
1157 | cgGLDisableTextureParameter(sNoiseTexShadowParam);
|
---|
1158 |
|
---|
1159 | FrameBufferObject::Release();
|
---|
1160 |
|
---|
1161 | PrintGLerror("deferred shading + shadows");
|
---|
1162 | }
|
---|
1163 |
|
---|
1164 |
|
---|
1165 | void DeferredRenderer::SetSamplingMethod(SAMPLING_METHOD s)
|
---|
1166 | {
|
---|
1167 | if (s != mSamplingMethod)
|
---|
1168 | {
|
---|
1169 | mSamplingMethod = s;
|
---|
1170 | mRegenerateSamples = true;
|
---|
1171 | }
|
---|
1172 | }
|
---|
1173 |
|
---|
1174 |
|
---|
1175 | void DeferredRenderer::SetShadingMethod(SHADING_METHOD s)
|
---|
1176 | {
|
---|
1177 | if (s != mShadingMethod)
|
---|
1178 | {
|
---|
1179 | mShadingMethod = s;
|
---|
1180 | mRegenerateSamples = true;
|
---|
1181 | }
|
---|
1182 | }
|
---|
1183 |
|
---|
1184 |
|
---|
1185 | void DeferredRenderer::ComputeToneParameters(FrameBufferObject *fbo,
|
---|
1186 | DirectionalLight *light,
|
---|
1187 | float &imageKey,
|
---|
1188 | float &whiteLum,
|
---|
1189 | float &middleGrey)
|
---|
1190 | {
|
---|
1191 | // hack: estimate value where sky burns out
|
---|
1192 | whiteLum = log(1e4f);
|
---|
1193 |
|
---|
1194 | ////////////////////
|
---|
1195 | //-- linear interpolate brightness key depending on the current sun position
|
---|
1196 |
|
---|
1197 | const float minKey = 0.09f;
|
---|
1198 | const float maxKey = 0.5f;
|
---|
1199 |
|
---|
1200 | const float lightIntensity = DotProd(-light->GetDirection(), Vector3::UNIT_Z());
|
---|
1201 | middleGrey = lightIntensity * maxKey + (1.0f - lightIntensity) * minKey;
|
---|
1202 |
|
---|
1203 |
|
---|
1204 | #if 1
|
---|
1205 |
|
---|
1206 | //////////
|
---|
1207 | //-- compute avg loglum
|
---|
1208 |
|
---|
1209 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
1210 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
1211 |
|
---|
1212 | fbo->Bind();
|
---|
1213 |
|
---|
1214 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1215 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1216 |
|
---|
1217 |
|
---|
1218 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
1219 |
|
---|
1220 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
1221 | cgGLBindProgram(sCgLogLumProgram);
|
---|
1222 |
|
---|
1223 | cgGLSetTextureParameter(sColorsTexLogLumParam, colorsTex);
|
---|
1224 | cgGLEnableTextureParameter(sColorsTexLogLumParam);
|
---|
1225 |
|
---|
1226 | const float offs = 0.5f;
|
---|
1227 |
|
---|
1228 | glBegin(GL_QUADS);
|
---|
1229 |
|
---|
1230 | glTexCoord2f(0, 0); glVertex3f(-offs, -offs, -0.5f);
|
---|
1231 | glTexCoord2f(1, 0); glVertex3f( offs, -offs, -0.5f);
|
---|
1232 | glTexCoord2f(1, 1); glVertex3f( offs, offs, -0.5f);
|
---|
1233 | glTexCoord2f(0, 1); glVertex3f(-offs, offs, -0.5f);
|
---|
1234 |
|
---|
1235 | glEnd();
|
---|
1236 |
|
---|
1237 | cgGLDisableTextureParameter(sColorsTexLogLumParam);
|
---|
1238 |
|
---|
1239 | FrameBufferObject::Release();
|
---|
1240 |
|
---|
1241 | PrintGLerror("ToneMapParams");
|
---|
1242 |
|
---|
1243 | #endif
|
---|
1244 |
|
---|
1245 | ///////////////////
|
---|
1246 | //-- compute avg loglum in scene using mipmapping
|
---|
1247 |
|
---|
1248 | glBindTexture(GL_TEXTURE_2D, fbo->GetColorBuffer(colorBufferIdx)->GetTexture());
|
---|
1249 | glGenerateMipmapEXT(GL_TEXTURE_2D);
|
---|
1250 | }
|
---|
1251 |
|
---|
1252 |
|
---|
1253 | void DeferredRenderer::DownSample(FrameBufferObject *fbo)
|
---|
1254 | {
|
---|
1255 | GLuint intensityTex=0;
|
---|
1256 |
|
---|
1257 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
1258 | cgGLBindProgram(sCgDownSampleProgram);
|
---|
1259 |
|
---|
1260 | cgGLSetTextureParameter(sIntensityTexDownSampleParam, intensityTex);
|
---|
1261 | cgGLEnableTextureParameter(sIntensityTexDownSampleParam);
|
---|
1262 | }
|
---|
1263 |
|
---|
1264 |
|
---|
1265 | void DeferredRenderer::ToneMap(FrameBufferObject *fbo,
|
---|
1266 | DirectionalLight *light,
|
---|
1267 | float imageKey,
|
---|
1268 | float whiteLum,
|
---|
1269 | float middleGrey)
|
---|
1270 | {
|
---|
1271 | ColorBufferObject *colorBuffer = fbo->GetColorBuffer(colorBufferIdx);
|
---|
1272 |
|
---|
1273 | fbo->Bind();
|
---|
1274 |
|
---|
1275 | colorBufferIdx = 3 - colorBufferIdx;
|
---|
1276 | glDrawBuffers(1, mrt + colorBufferIdx);
|
---|
1277 |
|
---|
1278 |
|
---|
1279 | GLuint colorsTex = colorBuffer->GetTexture();
|
---|
1280 |
|
---|
1281 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
---|
1282 |
|
---|
1283 | cgGLEnableProfile(RenderState::sCgFragmentProfile);
|
---|
1284 | cgGLBindProgram(sCgToneProgram);
|
---|
1285 |
|
---|
1286 | cgGLSetTextureParameter(sColorsTexToneParam, colorsTex);
|
---|
1287 | cgGLEnableTextureParameter(sColorsTexToneParam);
|
---|
1288 |
|
---|
1289 | cgGLSetParameter1f(sImageKeyParam, imageKey);
|
---|
1290 | cgGLSetParameter1f(sWhiteLumParam, whiteLum);
|
---|
1291 | cgGLSetParameter1f(sMiddleGreyParam, middleGrey);
|
---|
1292 |
|
---|
1293 | glColor3f(1.0f, 1.0f, 1.0f);
|
---|
1294 |
|
---|
1295 | glBegin(GL_QUADS);
|
---|
1296 |
|
---|
1297 | // the neighbouring texels
|
---|
1298 | const float x_offs = 1.0f / mWidth;
|
---|
1299 | const float y_offs = 1.0f / mHeight;
|
---|
1300 |
|
---|
1301 | SetVertex(0, 0, x_offs, y_offs);
|
---|
1302 | SetVertex(1, 0, x_offs, y_offs);
|
---|
1303 | SetVertex(1, 1, x_offs, y_offs);
|
---|
1304 | SetVertex(0, 1, x_offs, y_offs);
|
---|
1305 |
|
---|
1306 | glEnd();
|
---|
1307 |
|
---|
1308 | cgGLDisableTextureParameter(sColorsTexToneParam);
|
---|
1309 | FrameBufferObject::Release();
|
---|
1310 |
|
---|
1311 | PrintGLerror("ToneMap");
|
---|
1312 | }
|
---|
1313 |
|
---|
1314 |
|
---|
1315 |
|
---|
1316 |
|
---|
1317 | } // namespace
|
---|