20 lines
No EOL
538 B
HLSL
20 lines
No EOL
538 B
HLSL
#include "../../math/const.hlsl"
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/*
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contributors: Shadi El Hajj
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description: Light Falloff equation, based on the model in Brian Karis' paper "Real Shading in Unreal Engine 4"
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use: float falloff(float dist, float lightRadius)
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license: MIT License (MIT) Copyright (c) 2024 Shadi EL Hajj
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*/
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#ifndef FNC_LIGHT_FALLOFF
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#define FNC_LIGHT_FALLOFF
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float falloff(float dist, float lightRadius) {
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float dr = dist/lightRadius;
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float att = saturate(1.0 - dr*dr*dr*dr);
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att *= att;
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return att / (dist * dist + EPSILON);
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}
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#endif |