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Collision Study

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There's a circle collision example on Processing's main site (http://processing.org/learning/topics/circlecollision.html) which was written by Ira Greenberg (and based off code by Keith Peter). But every time I went through it, I got confused by the way it was implemented. So this was just a test to see if I could get collisions working using dot products. I played fast and loose with the physics. I didn't care if it was right; I only cared that it LOOKED right. :) Click the display to restart the sketch...
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