Chapter 18: Rendering a Parallax Background

In this chapter, we'll go through the implementation of a parallax background, which is a technique used in 2D games to give a sense of depth.

The ParallaxLayer struct represents a single layer in our parallax background. Each layer has its own texture and speed, creating a sense of depth by moving slower the further it is from the viewer. The ParallaxBackground struct manages multiple layers, rendering and updating each layer.

The render method of a ParallaxLayer handles drawing the layer's texture to the screen, taking into account the layer's offset and the position of the camera. The update method adjusts the layer's offset based on its speed and the elapsed time.

The ParallaxBackground's render and update methods simply call the corresponding methods on each of its layers.