shaderlib/ambientocclusion_combine.glsl

   1 import postprocess;
   2 import ambientocclusion;
   3
   4 ////// fragment
   5 void main()
   6 {
   7         float sample = depth_ratio.x/(texture(depth, texcoord).r-depth_ratio.y);
   8         float sum = 1.0;
   9         float count = 1.0;
  10         for(int i=0; i<=3; ++i)
  11                 for(int j=0; j<=3; ++j)
  12                 {
  13                         vec2 offs = vec2(float(i)-1.5, float(j)-1.5)/screen_size;
  14                         float dxy = length(offs)*-sample;
  15                         float dz = depth_ratio.x/(texture(depth, texcoord+offs).r-depth_ratio.y)-sample;
  16                         if(abs(dz)<3.0*dxy)
  17                         {
  18                                 sum += texture(occlusion, texcoord+offs).r;
  19                                 count += 1.0;
  20                         }
  21                 }
  22         frag_color = texture(source, texcoord)*sum/count;
  23 }