Uses http://code.google.com/p/box2dweb/
http://code.google.com/p/box2dweb/ http://blog.allanbishop.com/box2d-2-1a-tutorial-%E2%80%93-part-3-custom-textures-and-shapes/ http://www.raywenderlich.com/457/intro-to-box2d-with-cocos2d-tutorial-bouncing-balls%22 https://github.com/oberhamsi/planetary-gamejs