11 lines
447 B
GLSL
11 lines
447 B
GLSL
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vec3 getSpecular(vec3 normal, vec3 eyedir, vec3 lightdir, vec3 color, float roughness)
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{
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// Half Light View direction
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vec3 H = normalize(eyedir + lightdir);
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float NdotH = max(0., dot(normal, H));
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float normalisationFactor = (roughness + 2.) / 8.;
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vec3 FresnelSchlick = color + (1.0f - color) * pow(1.0f - max(0., (dot(eyedir, H))), 5);
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return max(pow(NdotH, roughness) * FresnelSchlick * normalisationFactor, vec3(0.));
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}
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