Integrating the Game class
By now we already know how the
Game class works, what a game loop is for, and how to take advantage of it. For this chapter, we take the previously used Game class, and plug into it our newcomer World class.
Because we obeyed a few principles, this integration is very easy and it's just a matter of having a World object inside the
Game class, and then letting it update and draw itself in the appropriate times.
The run() method
Our application's
main() function has a simple job. It allocates a Game object, and lets it run itself through the run() method. When the run() method exits, the program releases its resources and closes.
Therefore, it is within the run() method that the magic happens! It is responsible for managing the famous game loop, fetching input from the window system, updating the world, and ordering the rendering of the game.
In the next chapter, events and input will be covered in depth. For now, it is only important to understand how the drawing...
