public float GeoTerms(ref ShadeRec sr)
{
float NDotD = (float)-SampleNormal.DotProduct(Wi);
float d2 = (float)Math.Pow((SamplePoint - sr.HitPoint).Length, 2);
return(NDotD / d2);
}
public Vector3D L(ref ShadeRec sr)
{
float NDotD = (float)-SampleNormal.DotProduct(Wi);
if (NDotD > 0.0f)
{
return(GeoObj.Material.Le(ref sr));
}
else
{
return(PreDefColor.BlackColor);
}
}
