How to detect two moving shapes overlapped?

Posted by user1389813 on Programmers See other posts from Programmers or by user1389813
Published on 2012-10-27T04:49:04Z Indexed on 2012/10/27 5:16 UTC
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java

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algorithms

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geometry

Given a list of circles with its coordinates (x and y) that are moving every second in different direction (South-East, South-West, North-East and North-West), and the circle will change direction if it hits the wall sort of like bouncing, so how do we detect if any of them collide or overlap with each other ? I am not sure if we can use some data structures like a Binary Search Tree because since all the coordinates vary every seconds, so the tree will have to re-build accordingly. Or can we use Vertical Sweep Line Algorithm each time ? Any ideas on how to do this in a efficient way ?

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