25 lines
838 B
HLSL
25 lines
838 B
HLSL
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#ifndef SKY_GRADIENT_INCLUDED
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#define SKY_GRADIENT_INCLUDED
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#include "JCommon.cginc"
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void CalculateSkyGradientColor(
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float4 localPos,
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fixed4 skyColor, fixed4 horizonColor, fixed4 groundColor,
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fixed horizonThickness, fixed horizonExponent, fixed horizonStep,
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out fixed4 skyBlendColor, out fixed4 horizonBlendColor)
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{
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skyBlendColor = lerp(groundColor, skyColor, localPos.y > 0);
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horizonThickness *= lerp(0.25, 1, localPos.y > 0);
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#if ALLOW_STEP_EFFECT
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localPos.y = StepValue(localPos.y, horizonStep);
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#endif
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fixed horizonBlendFactor = saturate(1 - InverseLerpUnclamped(0, horizonThickness, abs(localPos.y)));
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horizonBlendFactor = pow(horizonBlendFactor, horizonExponent);
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//horizon = lerp(color, horizonColor, horizonBlendFactor);
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horizonBlendColor = fixed4(horizonColor.xyz, horizonBlendFactor*horizonColor.a);
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}
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#endif
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