In the previous recipe, we implemented a basic form of firing that will work for many cases. The exit velocity for a bullet is usually around 300 m/s (or close to 1000 feet/s) and might seem near-instant at close range. For ranges over 30 m (approximately 90 feet), the delay starts to get noticeable though, and more realistic games might need another model. In this recipe, we'll look into a type of bullet that travels in the game world. It's still an invisible bullet, but it can easily be visualized if required.
This recipe can be seen as a more advanced version of the previous recipe and won't require many changes to what we did there but will mainly contain additions. Almost all of the functionalities will be implemented in a new class, called Bullet (not to be confused with the physics engine with the same name that we use in a Chapter 8, Physics with Bullet).