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KumoKairo/Skybox_Frag_03.cg

Created August 11, 2017 15:21
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Skybox_Frag_03.cg
#define HARDNESS_EXPONENT_BASE 0.125
half calcSunSpot(half3 sunDirPos, half3 skyDirPos)
{
half3 delta = sunDirPos - skyDirPos;
half dist = length(delta);
half spot = 1.0 - smoothstep(0.0, _SunSize, dist);
return 1.0 - pow(HARDNESS_EXPONENT_BASE, spot * _SunHardness);
}
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