23 lines
520 B
HLSL
23 lines
520 B
HLSL
#ifndef WMARK_H
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#define WMARK_H
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#include "common.hlsli"
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#define NORMAL_SHIFT 0.007f
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#define MIN_SHIFT 0.003f
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#define MAX_SHIFT 0.011f
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#define RANGE 100.f
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float4 wmark_shift(float3 pos, float3 norm)
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{
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float3 P = pos;
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float3 N = norm;
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float3 sd = eye_position - P;
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float d = length(sd);
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float w = min(d / RANGE, 1.f);
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float s = lerp(MIN_SHIFT, MAX_SHIFT, d);
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P += N.xyz * NORMAL_SHIFT;
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P -= normalize(eye_direction + normalize(P - eye_position)) * s;
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return float4(P, 1.f);
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}
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#endif
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