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Merge branch 'optimise-groundcover-lighting' into 'master'

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Optimise groundcover lighting

See merge request OpenMW/openmw!600
This commit is contained in:
psi29a 2021-02-11 20:49:45 +00:00
commit 5566f2b06b
1 changed files with 5 additions and 14 deletions
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19
files/shaders/lighting.glsl
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@ -13,22 +13,13 @@ void perLight(out vec3 ambientOut, out vec3 diffuseOut, int lightIndex, vec3 vie
#ifndef GROUNDCOVER
lambert = max(lambert, 0.0);
#else
float eyeCosine = dot(normalize(viewPos), viewNormal.xyz);
if (lambert < 0.0)
{
float cosine = dot(normalize(viewPos), normalize(viewNormal.xyz));
if (lambert >= 0.0)
cosine = -cosine;
float mult = 1.0;
float divisor = 8.0;
if (cosine < 0.0 && cosine >= -1.0/divisor)
mult = mix(1.0, 0.3, -cosine*divisor);
else if (cosine < -1.0/divisor)
mult = 0.3;
lambert *= mult;
lambert = abs(lambert);
lambert = -lambert;
eyeCosine = -eyeCosine;
}
lambert *= clamp(-8.0 * (1.0 - 0.3) * eyeCosine + 1.0, 0.3, 1.0);
#endif
diffuseOut = gl_LightSource[lightIndex].diffuse.xyz * lambert;
}