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34 lines
1.2 KiB
HLSL
34 lines
1.2 KiB
HLSL
#ifndef DECALS_LIGHTING_INCLUDED
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#define DECALS_LIGHTING_INCLUDED
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// modifed version of the KSP BlinnPhong because it does some weird things
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inline fixed4 LightingBlinnPhongDecal(SurfaceOutput s, fixed3 lightDir, half3 viewDir, fixed atten)
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{
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s.Normal = normalize(s.Normal);
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half3 h = normalize(lightDir + viewDir);
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fixed diff = max(0, dot(s.Normal, lightDir));
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float nh = max(0, dot(s.Normal, h));
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float spec = pow(nh, s.Specular*128.0) * s.Gloss;
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fixed4 c = 0;
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c.rgb = (s.Albedo * _LightColor0.rgb * diff + _LightColor0.rgb * _SpecColor.rgb * spec) * (atten);
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return c;
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}
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// KSP underwater fog function
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float4 UnderwaterFog(float3 worldPos, float3 color)
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{
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float3 toPixel = worldPos - _LocalCameraPos.xyz;
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float toPixelLength = length(toPixel);
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float underwaterDetection = _UnderwaterFogFactor * _LocalCameraDir.w;
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float albedoLerpValue = underwaterDetection * (_UnderwaterMaxAlbedoFog * saturate(toPixelLength * _UnderwaterAlbedoDistanceScalar));
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float alphaFactor = 1 - underwaterDetection * (_UnderwaterMaxAlphaFog * saturate((toPixelLength - _UnderwaterMinAlphaFogDistance) * _UnderwaterAlphaDistanceScalar));
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return float4(lerp(color, _UnderwaterFogColor.rgb, albedoLerpValue), alphaFactor);
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}
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#endif
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