public bool IsShadowed(Light l, Tuple p)
{
Tuple v = l.Position - p;
float distance = v.Magnitude();
Tuple direction = v.Normalize();
Ray r = new Ray(p, direction);
List <Intersection> intersections = Intersection(r);
RayTracer.Intersection h = RayTracer.Intersection.Hit(intersections);
return((h != null) && (h.T < distance));
}
private Tuple NormalToWorld(Tuple normal)
{
normal = Transform.Inverse().Transpose() * normal;
normal.W = 0;
normal = normal.Normalize();
if (Parent != null)
{
normal = Parent.NormalToWorld(normal);
}
return(normal);
}
