public override ColorChannel calcColor(Ray3 ray, Vector3 position, Vector3 normal)
{
float nl = normal.dot(Constant.light);
Vector3 h = (Constant.light.sub(ray.getDirection)).nor();
float nh = normal.dot(h);
ColorChannel tmpDiff = diffuse.mul(Math.Max(nl, 0));
ColorChannel tmpSpec = specular.mul(Math.Max(nh, 0));
return(Constant.lightChannel.mud(tmpDiff.add(tmpSpec)));
}