56 lines
1.8 KiB
HLSL
56 lines
1.8 KiB
HLSL
//Stylized Water 2
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//Staggart Creations (http://staggart.xyz)
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//Copyright protected under Unity Asset Store EULA
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#ifndef WATER_FOAM_INCLUDED
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#define WATER_FOAM_INCLUDED
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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TEXTURE2D(_FoamTex);
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SAMPLER(sampler_FoamTex);
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#define FOAM_CHANNEL 0
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float SampleFoamTexture(TEXTURE2D_PARAM(tex, samplerName), float2 uv, float2 tiling, float subTiling, float2 time, float speed, float subSpeed, float slopeMask, float slopeSpeed, float slopeStretch, bool slopeFoamOn)
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{
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float4 uvs = PackedUV(uv, tiling, time, speed, subTiling, subSpeed);
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float f1 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.xy)[FOAM_CHANNEL];
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float f2 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.zw)[FOAM_CHANNEL];
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#if UNITY_COLORSPACE_GAMMA
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f1 = SRGBToLinear(f1);
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f2 = SRGBToLinear(f2);
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#endif
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float foam = saturate(f1 + f2);
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if(slopeFoamOn)
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{
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uvs = PackedUV(uv, tiling, time, speed * slopeSpeed, subTiling, subSpeed * slopeSpeed);
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//Stretch UV vertically on slope
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uvs.yw *= 1-slopeStretch;
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//Cannot reuse the same UV, slope foam needs to be resampled and blended in
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float f3 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.xy)[FOAM_CHANNEL];
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float f4 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.zw)[FOAM_CHANNEL];
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#if UNITY_COLORSPACE_GAMMA
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f3 = SRGBToLinear(f3);
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f4 = SRGBToLinear(f4);
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#endif
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const half slopeFoam = saturate(f3 + f4);
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foam = lerp(foam, slopeFoam, slopeMask);
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}
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return foam;
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}
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float SampleFoamTexture(float2 uv, float2 tiling, float subTiling, float2 time, float speed, float subSpeed, float slopeMask, float slopeSpeed, half slopeStretch, bool slopeFoamOn)
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{
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return SampleFoamTexture(TEXTURE2D_ARGS(_FoamTex, sampler_FoamTex), uv, tiling, subTiling, time, speed, subSpeed, slopeMask, slopeSpeed, slopeStretch, slopeFoamOn);
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}
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#endif |