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Tweaked light attenuation formula some more.

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Keeping the ulightvec parameter for now - I want to revisit this later.
This commit is contained in:
Geenz 2016-05-22 21:02:28 -04:00
parent 9e9f95059f
commit 180f4ba4f5
1 changed files with 3 additions and 1 deletions
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4
libraries/model/src/model/Light.slh
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@ -106,9 +106,11 @@ float evalLightAttenuation(Light l, float d, vec3 ulightvec) {
float denom = d / radius + 1.0;
float attenuation = 1.0 / (denom * denom);
float cutoff = getLightCutoffRadius(l);
// "Fade" the edges of light sources to make things look a bit more attractive.
// Note: this tends to look a bit odd at lower exponents.
attenuation *= clamp(0, 1, mix(0, 1, getLightCutoffSquareRadius(l) - dot(ulightvec, ulightvec)));
attenuation *= min(1, max(0, -(d - cutoff)));
return attenuation;
}