Cocoa Touch - How to check if a non-rectangular object in a UIImageView intersects another object?

I think if you have limited set of possible shapes then it is better to perform the check for each possible pair of object shapes rather then some generic algorithm. For example two circles intersect if the distance between their centers is less then the sum of their radiuses etc.

Wow, simplicity at its best. Thanks so much, I didn't even think of that! It's going to work since I will most likely only work with round objects for now.

– hwaxxer Jan 26 '10 at 14:33.

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