32 lines
1.1 KiB
HLSL
32 lines
1.1 KiB
HLSL
#ifndef VOLUMETRIC_FOG_2_FOG_DISTANCE
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#define VOLUMETRIC_FOG_2_FOG_DISTANCE
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TEXTURE2D(_DepthGradientTex);
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SAMPLER(_depthGradient_linear_clamp_sampler);
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TEXTURE2D(_HeightGradientTex);
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SAMPLER(_heightGradient_linear_clamp_sampler);
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inline half ApplyFogDistance(float3 rayStart, float3 wpos) {
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float3 vd = rayStart - wpos;
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float voidDistance = dot(vd, vd) * _DistanceData.w;
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half alpha = saturate(_DistanceData.y - voidDistance);
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return alpha;
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}
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inline half4 ApplyDepthGradient(float3 rayStart, float3 wpos) {
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float2 vd = rayStart.xz - wpos.xz;
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float depthGradientCoord = dot(vd, vd) * _DistanceData.z;
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half4 depthColor = SAMPLE_TEXTURE2D_LOD(_DepthGradientTex, _depthGradient_linear_clamp_sampler, float2(depthGradientCoord, 0), 0);
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return depthColor;
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}
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inline half4 ApplyHeightGradient(float3 wpos) {
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float heightGradientCoord = saturate( (wpos.y - BOUNDS_BOTTOM) / BOUNDS_SIZE_Y );
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half4 heightColor = SAMPLE_TEXTURE2D_LOD(_HeightGradientTex, _heightGradient_linear_clamp_sampler, float2(heightGradientCoord, 0), 0);
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return heightColor;
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}
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#endif |