How to do reflective collisions with particles hitting background tiles?

Posted by Shawn LeBlanc on Game Development See other posts from Game Development or by Shawn LeBlanc
Published on 2012-03-29T02:13:02Z Indexed on 2012/03/29 5:42 UTC
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Filed under:

collision-detection

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platform-games

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Platformer

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pixel

In my 2d pixel old-school platformer, I'm looking for methods for bouncing particles off of background tiles. Particles aren't affected by gravity and collisions are "reflective". By that I mean a particle hitting the side of a square tile at 45 degrees should bounce off at 45 degrees as well.

We can assume that tiles will always be perfectly square. No slopes or anything.

What are efficient methods and algorithms to do this? I'd be implementing this on a Sega Genesis.

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