Firstborn/Assets/Daz3D/Shaders/UnofficialDTU/GetLightDirectionURP.hlsl

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//////////////////////////////
//
// Code based on tutorial by Daniel Ilett
// https://danielilett.com/2020-03-21-tut5-urp-cel-shading/
//
//////////////////////////////
void MainLight_half(float3 WorldPos, out half3 Direction)
{
#if SHADERGRAPH_PREVIEW
Direction = half3(0.5, 0.5, 0);
#else
#if SHADOWS_SCREEN
half4 clipPos = TransformWorldToHClip(WorldPos);
half4 shadowCoord = ComputeScreenPos(clipPos);
#else
half4 shadowCoord = TransformWorldToShadowCoord(WorldPos);
#endif
Light mainLight = GetMainLight(shadowCoord);
Direction = mainLight.direction;
#endif
}