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a guest Dec 18th, 2014 148 Never
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  1. // obtain position from texcoord and depth
  2. vec3 getpos (in vec3 p)
  3. {
  4.         vec4 pos = inverse (projmat) * vec4 (p * 2 - 1, 1);
  5.         pos /= pos.w;
  6.         pos = inverse (viewmat) * pos;
  7.         return pos.xyz / pos.w;
  8. }
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