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Owen Deery

SAT collision smoothing

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I'm trying to do some simple separating axis collision detection/response. I've followed the documentation on MetaNet's website and it's turned out mostly good. The main problem seems to be the response, I've got the objects being projected out of each other using the minimum overlap but the collision is extremely jumpy especially when interacting with a static object or when there are several dynamic objects piled on top of each other. Is there any way I can solidify this system through some sort of relaxation or iteration method? Or is this just one of the downsides to SAT collision detection? http://img2.imageshack.us/img2/5647/75745422.jpg

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it's the nature of the beast. Object stacking is always a problem, you need to resolve collisions in low to high order.

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For stacks, you could try doing multiple passes per frame, so that the objects can "push" each other; if you only do a single collision pass, earlier objects can push later objects, but not vice-versa.. which can cause problems.

[Edited by - raigan on August 15, 2009 7:17:49 PM]

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