public static Computations prepare_computations(Intersection intersection, Ray ray)
{
Computations comps = new Computations();
comps.t = intersection.t;
comps.obj = intersection.obj;
comps.point = position(ray, comps.t);
comps.eyev = -1 * ray.direction;
comps.normalv = normal_at(comps.obj, comps.point);
if (dot(comps.eyev, comps.normalv) < 0)
{
comps.inside = true;
comps.normalv *= -1;
}
else
{
comps.inside = false;
}
return(comps);
}
public static Color shade_hit(World world, Computations computations)
{
return(lighting(computations.obj.material, world.light, computations.point, computations.eyev, computations.normalv));
}