public RgbColor Evaluate(float cosI)
{
var diel = new RgbColor(FresnelDielectric.Evaluate(cosI, 1, IndexOfRefraction));
var schlick = FresnelSchlick.Evaluate(ReflectanceAtNormal, cosI);
return(RgbColor.Lerp(Metallic, diel, schlick));
}
public static RgbColor Evaluate(RgbColor R0, float cosTheta)
{
return(RgbColor.Lerp(SchlickWeight(cosTheta), R0, RgbColor.White));
}
