forked from Mirrorlandia_minetest/irrlicht
9954667c45
The exact commands to make this commit were: git reset --hard origin/master find -type f | # list all regular files grep -E '\.(h|cpp|fsh|vsh|mm)|LICENSE$' | # filter for text files xargs -n 1 -P $(nproc) sed -i 's:\s*$::' # for each file, trim trailing whitespace including the CR git commit -a
68 lines
1.2 KiB
GLSL
68 lines
1.2 KiB
GLSL
precision mediump float;
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/* Uniforms */
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uniform float uAlphaRef;
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uniform int uTextureUsage0;
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uniform sampler2D uTextureUnit0;
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uniform int uFogEnable;
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uniform int uFogType;
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uniform vec4 uFogColor;
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uniform float uFogStart;
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uniform float uFogEnd;
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uniform float uFogDensity;
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/* Varyings */
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varying vec2 vTextureCoord0;
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varying vec4 vVertexColor;
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varying vec4 vSpecularColor;
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varying float vFogCoord;
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float computeFog()
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{
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const float LOG2 = 1.442695;
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float FogFactor = 0.0;
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if (uFogType == 0) // Exp
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{
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FogFactor = exp2(-uFogDensity * vFogCoord * LOG2);
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}
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else if (uFogType == 1) // Linear
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{
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float Scale = 1.0 / (uFogEnd - uFogStart);
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FogFactor = (uFogEnd - vFogCoord) * Scale;
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}
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else if (uFogType == 2) // Exp2
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{
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FogFactor = exp2(-uFogDensity * uFogDensity * vFogCoord * vFogCoord * LOG2);
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}
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FogFactor = clamp(FogFactor, 0.0, 1.0);
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return FogFactor;
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}
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void main()
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{
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vec4 Color = vVertexColor;
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if (bool(uTextureUsage0))
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Color *= texture2D(uTextureUnit0, vTextureCoord0);
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if (Color.a < uAlphaRef)
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discard;
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Color += vSpecularColor;
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if (bool(uFogEnable))
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{
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float FogFactor = computeFog();
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vec4 FogColor = uFogColor;
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FogColor.a = 1.0;
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Color = mix(FogColor, Color, FogFactor);
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}
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gl_FragColor = Color;
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}
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