26 lines
767 B
GLSL
26 lines
767 B
GLSL
uniform sampler2D depth_tex;
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uniform sampler2D normal_tex;
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uniform sampler2D color_tex;
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uniform sampler2D spec_emis_tex;
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uniform vec4 fg_FogColor;
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uniform float fg_FogDensity;
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uniform vec3 fg_Planes;
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varying vec3 ray;
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vec3 position( vec3 viewDir, vec2 coords, sampler2D depth_tex );
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void main() {
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vec2 coords = gl_TexCoord[0].xy;
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float initialized = texture2D( spec_emis_tex, coords ).a;
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if ( initialized < 0.1 )
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discard;
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vec3 normal;
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vec3 pos = position( normalize(ray), coords, depth_tex );
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float fogFactor = 0.0;
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const float LOG2 = 1.442695;
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fogFactor = exp2(-fg_FogDensity * fg_FogDensity * pos.z * pos.z * LOG2);
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fogFactor = clamp(fogFactor, 0.0, 1.0);
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gl_FragColor = vec4(fg_FogColor.rgb, 1.0 - fogFactor);
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}
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