Book Image

Game Development with Rust and WebAssembly

By : Eric Smith
Book Image

Game Development with Rust and WebAssembly

By: Eric Smith

Overview of this book

The Rust programming language has held the most-loved technology ranking on Stack Overflow for 6 years running, while JavaScript has been the most-used programming language for 9 years straight as it runs on every web browser. Now, thanks to WebAssembly (or Wasm), you can use the language you love on the platform that's everywhere. This book is an easy-to-follow reference to help you develop your own games, teaching you all about game development and how to create an endless runner from scratch. You'll begin by drawing simple graphics in the browser window, and then learn how to move the main character across the screen. You'll also create a game loop, a renderer, and more, all written entirely in Rust. After getting simple shapes onto the screen, you'll scale the challenge by adding sprites, sounds, and user input. As you advance, you'll discover how to implement a procedurally generated world. Finally, you'll learn how to keep your Rust code clean and organized so you can continue to implement new features and deploy your app on the web. By the end of this Rust programming book, you'll build a 2D game in Rust, deploy it to the web, and be confident enough to start building your own games.
Table of Contents (16 chapters)
1
Part 1: Getting Started with Rust, WebAssembly, and Game Development
4
Part 2: Writing Your Endless Runner
11
Part 3: Testing and Advanced Tricks

Chapter 2: Drawing Sprites

Now that we've got a working app and we're drawing to the screen, we can start making something that actually looks like a game. That means rendering sprites, which is just a fancy way of saying drawing pictures. So, in this chapter, we'll start by defining what those pictures are by doing a little bit of game design, and then we'll render a static sprite to the screen. Since a static picture is a pretty boring game, we'll even get the sprite animating too.

In this chapter, we'll do the following:

  • Design our game, Walk the Dog.
  • Render a sprite to the Canvas.
  • Use a sprite sheet to load many sprites at once.
  • Animate a character via the sprite sheet.

By the end of this chapter, you'll be drawing characters instead of static triangles, and you'll even have them running on the screen.