69 lines
1.3 KiB
HLSL
69 lines
1.3 KiB
HLSL
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#ifndef WATER_TOOLBOX
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#define WATER_TOOLBOX
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#include "UnityCG.cginc"
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inline half3 PerPixelNormal(sampler2D bumpMap, half4 coords, half3 vertexNormal, half bumpStrength)
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{
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half3 bump = (UnpackNormal(tex2D(bumpMap, coords.xy)) + UnpackNormal(tex2D(bumpMap, coords.zw))) * 0.5;
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half3 worldNormal = vertexNormal + bump.xxy * bumpStrength * half3(1,0,1);
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return normalize(worldNormal);
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}
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inline half Fresnel(half3 viewVector, half3 worldNormal, half bias, half power)
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{
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half facing = clamp(1.0-max(dot(-viewVector, worldNormal), 0.0), 0.0,1.0);
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half refl2Refr = saturate(bias+(1.0-bias) * pow(facing,power));
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return refl2Refr;
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}
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inline void ComputeScreenAndGrabPassPos (float4 pos, out float4 screenPos, out float4 grabPassPos)
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{
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#if UNITY_UV_STARTS_AT_TOP
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float scale = -1.0;
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#else
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float scale = 1.0f;
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#endif
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screenPos = ComputeScreenPos(pos);
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grabPassPos.xy = ( float2( pos.x, pos.y*scale ) + pos.w ) * 0.5;
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grabPassPos.zw = pos.zw;
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}
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inline float waterHeight(float _WaveLengthInverse, float _Intensity, float _Periode, half2 p)
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{
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p *= _WaveLengthInverse;
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float v = (cos(_Time.y * _Periode + p.x) + sin(_Time.y * _Periode + p.y)) * _Intensity * 0.25;
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return v;
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}
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inline float4 WaterHeightAt(float4 pos)
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{
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pos.y = 5;
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return pos;
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}
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#endif
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