binaries/data/mods/public/shaders/glsl/common/fog.h

   1 #ifndef INCLUDED_COMMON_FOG
   2 #define INCLUDED_COMMON_FOG
   3
   4 vec3 applyFog(vec3 color, vec3 fogColor, vec2 fogParams)
   5 {
   6 #if USE_FOG
   7         float density = fogParams.x;
   8         float maxFog = fogParams.y;
   9
  10         const float LOG2 = 1.442695;
  11         float z = gl_FragCoord.z / gl_FragCoord.w;
  12         float fogFactor = exp2(-density * density * z * z * LOG2);
  13
  14         fogFactor = fogFactor * (1.0 - maxFog) + maxFog;
  15
  16         fogFactor = clamp(fogFactor, 0.0, 1.0);
  17
  18         return mix(fogColor, color, fogFactor);
  19 #else
  20         return color;
  21 #endif
  22 }
  23
  24 #endif // INCLUDED_COMMON_FOG