Sphere / Box collision generates multiple contact points

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Mathieu Colleaux
Posts: 9
Joined: Thu Mar 26, 2009 6:09 pm
Location: France

Sphere / Box collision generates multiple contact points

Post by Mathieu Colleaux »

Hello,

I am experiencing some troubles with the collision detection in Bullet. During a collision between a sphere and a box there are more than one contact point generated, which is not physically possible. I would like to know if anybody have already experienced that and how to solve it.

Thanks in advance,

M. Colleaux
slithEToves
Posts: 24
Joined: Mon Mar 12, 2007 9:55 pm

Re: Sphere / Box collision generates multiple contact points

Post by slithEToves »

Bullet allows some penetration, and because of this, you can have multiple contact points. Bullet keeps up to 4 points, 3 to specify a contact triangle, and 1 that represents the deepest point of penetration. In your case, if you only want to consider 1 point, you can most likely just use the point with deepest penetration.
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