Book Image

Building Games with Flutter

By : Paul Teale
Book Image

Building Games with Flutter

By: Paul Teale

Overview of this book

With its powerful tools and quick implementation capabilities, Flutter provides a new way to build scalable cross-platform apps. In this book, you'll learn how to build on your knowledge and use Flutter as the foundation for creating games. This game development book takes a hands-on approach to building a complete game from scratch. You'll see how to get started with the Flame library and build a simple animated example to test Flame. You'll then discover how to organize and load images and audio in your Flutter game. As you advance, you'll gain insights into the game loop and set it up for fast and efficient processing. The book also guides you in using Tiled to create maps, add sprites to the maps that the player can interact with, and see how to use tilemap collision to create paths for a player to walk on. Finally, you'll learn how to make enemies more intelligent with artificial intelligence (AI). By the end of the book, you'll have gained the confidence to build fun multiplatform games with Flutter.
Table of Contents (17 chapters)
1
Part 1: Game Basics
5
Part 2: Graphics and Sound
11
Part 3: Advanced Games Programming

Colliding with other sprites

Let's fix the issue with George wandering off the edge of the screen that we saw at the end of the last section and flip the direction if he hits the edge of the screen. To do this, follow these steps:

  1. In the onLoad function of main.dart, let's add the ScreenCollidable component to the bottom of the function so we can detect collisions between George and the screen edges:
    add(ScreenCollidable());
  2. In the george.dart file, change the class definition to add the HasHitBoxes and Collidable mixins:
    class George extends SpriteAnimationComponent with HasHitBoxes, Collidable {
  3. At the bottom of the onLoad function, add the HitboxRectangle shape for the collision detection:
    addHitbox(HitboxRectangle());
  4. Add the following import at the top of the file to resolve the reference to HitboxRectangle:
    import 'package:flame/geometry.dart';
  5. At the bottom of this class file, after the update function definition, add the following onCollision...