Chapter 1. Hello Box2D World
If you want to create 2D physics-driven games and applications, Box2D is the best choice available. Box2D is a 2D rigid body simulation library used in some of the most successful games, such as Angry Birds and Tiny Wings on iPhone or Totem Destroyer and Red Remover on Flash. Google them, and you'll see a lot of enthusiastic reviews.
Before we dive into the Box2D World, let me explain what is a rigid body . It's a piece of matter that is so strong that it can't be bent in any way. There is no way to modify its shape, no matter how hard you hit it or throw it. In the real world, you can think about something as hard as a diamond, or even more. Matter coming from outer space that can't be deformed.
Box2D only manages ...
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