I am making a small juggling game and had trouble with balls colliding using box2d. I started using chipmunk physics so that I could filter collisions. Chipmunk physics is awesome, but I don't understand the parameters very well. How do I apply force to the bottom of the ball so it pops up when tapped via touch? Any help with this juggling mechanic would greatly help.
I uploaded the capx file to http://bityummy.com/jugtap.capx
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Force is for continuous "pressure".
In your case you should apply impulse.
Tap is a gesture, it takes longer time to register, use "On touched object" event instead.
Also, the ball mass is too big.
Try this: