public bool IsShadowed(ILight light, Tuple4 pointOverSurface)
{
var lightDir = light.GetLightDirection(pointOverSurface);
if (!lightDir.Equals(Tuple4.ZeroVector))
{
var lh = CalculateIntersection(Tuple4.Add(pointOverSurface, Tuple4.Scale(lightDir, Constants.Epsilon)), lightDir);
if (lh.IsHit)
{
var distance = light.GetLightDistance(pointOverSurface);
if (lh.Distance < distance)
{
return(true);
}
}
}
return(false);
}