Preface
This is a book that is very much in the spirit of the Feynman quote on the dedication page, an undisciplined, irreverent, and original book on how to program the physics used in 2D video games. If you are looking at it for the first time, then your mind is probably abuzz with questions.1 Here are brief answers to some of the more obvious ones.
● Why 2D Game Physics?
2D game physics is a practical and useful thing to know. It is practical because it has been used in successful commercial 2D video games.2 It is useful because even if you are not interested in 2D game physics in its own right, you’ll find that moving from 2D to 3D game physics is relatively easy.3
● Why Box2D?
Box2D is a popular Open Source 2D game physics package that ...
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