Book Image

Box2D for Flash Games

Book Image

Box2D for Flash Games

Overview of this book

Physics games are getting more and more popular, and Box2D is the best choice if you are looking for a free, stable and robust library to handle physics. With Box2D you can create every kind of 2D physics game, only coding is not the fun part, but the game itself. "Box2D for Flash Games" will guide you through the process of making a Flash physics game starting from the bare bones and taking you by hand through complex features such as forces, joints and motors. As you are learning, your game will have more and more features, like the physics games you are used to playing. The book analyzes two of the most played physics games, and breaks them down to allow readers to build them from scratch in a step-by-step approach. By the end of the book, you will learn how to create basic primitive bodies as well as complex, compound bodies. Motors will give life to cars, catapults and siege machines firing bullets, while a complete collision management will make your game look even more realistic. If you want to make full Flash games with physics, then Box2D for Flash Games will guide you through the entire process of making a Flash physics game.
Table of Contents (15 chapters)
Box2D for Flash Games
About the Author
About the Reviewers

Chapter 3. Interacting with Bodies

Every Box2D based game has its own way to interact with bodies. Totem Destroyer and Red Remover allow the player to destroy bodies by clicking them with the mouse, while Angry Birds makes bodies (birds) fly by dragging them. You already know how to create primitive and complex bodies; it's time to see how Box2D allows us to interact with bodies in its world.

In this chapter you will learn various ways to interact with and get information from Box2D bodies, including:

  • Selecting bodies with the mouse

  • Destroying bodies

  • Setting custom properties to bodies

  • Looping through all bodies in the world

  • Getting body information

By the end of the chapter, you will have a completely playable Totem Destroyer level.

The simplest and most intuitive way by which we can interact with Box2D bodies is destroying them with a mouse click.