shaderlib/ambientocclusion.glsl

   1 const int max_samples = 32;
   2
   3 uniform mat4 projection_matrix;
   4
   5 uniform sampler2D depth;
   6 uniform sampler2D occlusion;
   7 uniform sampler2D rotate;
   8 uniform AmbientOcclusionParams
   9 {
  10         mat4 inverse_projection;
  11         float darkness;
  12         vec3 sample_points[max_samples];
  13         int n_samples;
  14         float occlusion_radius;
  15         float edge_depth_threshold;
  16 };
  17
  18 #pragma MSP stage(fragment)
  19 vec3 project(vec3 position)
  20 {
  21         vec4 pp = projection_matrix*vec4(position, 1.0);
  22         return pp.xyz/pp.w;
  23 }
  24
  25 vec3 unproject(vec3 position)
  26 {
  27         vec4 upp = inverse_projection*vec4(position, 1.0);
  28         return upp.xyz/upp.w;
  29 }