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I mean I don't how to programm that when one ellipse affect on the puck it should gather speed and if touch the wall it should bounce. Like in this game http://www.gry.jeja.pl/2668,mistrzostwa-swiata-w-cymbergaja.html
Answers
Check previous posts: https://forum.processing.org/two/search?Search=collision
Kf
See also these examples: a simple bounce, and a more complex multi-object bounce with swapping momentum (perfect for paddles and puck in air hockey).
Thanks a lot