So I’m really a doo-doo head for not bothering to demonstrate this sooner. . . but you can now use my Vector3D class as a library. Of course, this isn’t nearly as sophisticated as what you might, say, be able to do with traer.physics, but since this class is used in virtually all of my Nature of Code examples, it’s not such a nice thing to have to keep adding it to each project over and over and over and over again. . .