public Ray(Vec pnt, Vec dir) {
P = new Vec(pnt.x, pnt.y, pnt.z);
D = new Vec(dir.x, dir.y, dir.z);
D.normalize();
}
public static void main(String[] args) {
Vec vec = new Vec(10000f, 1f);
vec.normalize();
System.out.println(vec);
}