[ODE] cylinder plane bug

gl gl at ntlworld.com
Wed Sep 20 08:18:52 MST 2006

> I tend to agree with Bram. A plane is an infinitely thin, infinitely wide 
> and
> long part of 3D space. As such, it has no volume, and therefore the only 
> way to
> collide with it is to touch it (i.e. a solid can't be "inside" a plane).

I disagree, a plane seperates space into 'inside' and 'outside'.  As such 
any penetration with the inside half-space should be considered as such. 
This is a desireable property for collision, particularly when you don't 
have swept volumes that would spot tunelling otherwise.

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