You may not know it, but there’s an unseen world of invisible forces at work in your games, called vectors. They’re what make your objects move and detect collisions, and they help you create simulations of real-world physical objects. Vectors are like the atoms and molecules of the game universe—everything depends on them, but they’re very hard to see with the naked eye.
In this appendix, we’re going to peel away the veil of this mysterious realm to examine these smallest but most important components of the video game universe. With the help of a bit ...