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In my game, I am using Cocos2D for the Game part. I am now trying to implement gravity but I am hearing that I have to use Box2D or Chipmunk. I could use those but is there any way to do this in Cocos2D, can anyone share any ideas/code just so I can add some simple gravity using Cocos2D if possible?
Thanks!
Its very easy using Box 2d and Chipmunk. Its inbuilt in cocos2d framework. Just when you start with the cocos2d application template(for iOS) select the Box2D/Chipmunk template. Its very easy.
Inorder to start with some gravity you have to create a world and add gravity vectors to it. You have a very simple and detailed tutorial in
http://www.raywenderlich.com/457/intro-to-box2d-with-cocos2d-tutorial-bouncing-balls
Its a tutorial that teaches you to create a bouncing ball app in Cocos2d Box2d Framework.