Differential D3340 Diff 15220 binaries/data/mods/public/shaders/glsl/common/fog.h

Changeset View

Standalone View

				#ifndef INCLUDED_FOG
				#define INCLUDED_FOG

				#if USE_FOG
				uniform vec3 fogColor;
				uniform vec2 fogParams;
				#endif

				vec3 applyFog(vec3 color)
				{
				#if USE_FOG
				float density = fogParams.x;
				float maxFog = fogParams.y;

				const float LOG2 = 1.442695;
				float z = gl_FragCoord.z / gl_FragCoord.w;
				float fogFactor = exp2(-density * density * z * z * LOG2);

				fogFactor = fogFactor * (1.0 - maxFog) + maxFog;

				fogFactor = clamp(fogFactor, 0.0, 1.0);

				return mix(fogColor, color, fogFactor);
				#else
				return color;
				#endif
				}

				#endif // INCLUDED_FOG