We will learn a lot, as well as get plenty done to the game in this chapter. We will first learn about the fundamental C++ topic of pointers. Pointers are variables that hold memory addresses. Typically, a pointer will hold the memory address of another variable. This sounds a bit like a reference but we will see how they are much more powerful. We will also use a pointer to handle an ever-expanding horde of zombies.

We will also learn about the Standard Template Library (STL) which is a collection of classes that allow us to quickly and easily implement common data management techniques.

Once we understand the basics of the STL, we will be able to use that new knowledge to manage all the textures from the game, because if we have 1000 zombies, we don't really want to load a copy of a zombie graphic into the GPU for each and every one.

We will also dig a little deeper into OOP and use a static function which is a function...