36 lines
755 B
HLSL
36 lines
755 B
HLSL
#ifndef PWETLENS_COMMON_INCLUDED
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#define PWETLENS_COMMON_INCLUDED
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PDECLARE_TEXTURE2D(_MainTex);
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PDECLARE_TEXTURE2D(_WetLensTex);
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float _Strength;
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float2 DistorUV(float2 uv)
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{
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float3 n = PSAMPLE_TEXTURE2D(_WetLensTex, uv).xyz;
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n = lerp(float3(0.5, 0.5, 0), n, _Strength);
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n = n * 2 - 1;
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n = normalize(n) * 0.1;
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//fade function y=1-x^8, x[-1,1]
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float2 uvRemap = uv * 2 - 1; //remap to [-1, 1]
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float x = uvRemap.x;
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float fadeX = 1 - x * x * x * x * x * x * x * x;
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float y = uvRemap.y;
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float fadeY = 1 - y * y * y * y * y * y * y * y;
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float fade = fadeX * fadeY;
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n *= fade;
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uv += float2(-n.x, -n.y);
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return uv;
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}
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float4 ApplyWetLens(float2 uv)
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{
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uv = DistorUV(uv);
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float4 color = PSAMPLE_TEXTURE2D(_MainTex, uv);
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return color;
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}
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#endif
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