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 };
  16
  17 #pragma MSP stage(fragment)
  18 vec3 project(vec3 position)
  19 {
  20         vec4 pp = projection_matrix*vec4(position, 1.0);
  21         return pp.xyz/pp.w;
  22 }
  23
  24 vec3 unproject(vec3 position)
  25 {
  26         vec4 upp = inverse_projection*vec4(position, 1.0);
  27         return upp.xyz/upp.w;
  28 }