Creating a real scene

At the moment, RHB can move anywhere he wants, in an empty void, such as the one in The Matrix. It's progress; all that animation was real work, but it's not a game. It's time we put RHB in a setting – a background, platforms, maybe something to jump over. Let's start with a background.

Adding the background

Right now, our game can only render images from a sprite sheet, which we can use for a background, but that's overkill for one image. Instead, we'll add a new struct that draws a simple image from a .png file. Then, we'll add that to the draw and initialize functions in WalkTheDog:

1. Create an Image struct.

We can work bottom-up for these changes, adding code to the engine and then integrating it into the game. Our Image struct will use a lot of the same code that we wrote in Chapter 2, Drawing Sprites, but with a simpler setup because we won't be using a sheet. All of this code should go into...