[ODE] cylinder plane bug

Jean-Sebastien Guay jean-sebastien.guay at polymtl.ca
Wed Sep 20 08:57:09 MST 2006


> 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.

A plane does separate space. Into what, the library can't know.

I might want to make objects fall onto both sides of a plane. Or what if I have
lots of planes all over the place and just want to make objects bounce between
them? Then, the inside of one plane might interfere with the outside of

There are other uses to planes than "ground planes". A library should not make
an assumption as to how you will use what it provides. It should provide it,
and you use it as you wish.

Anyways, I don't consider that a bug, and checking if an object is below a plane
is pretty easy to do application-side. If the ODE developers implement that
check in ODE, that's fine.

Jean-Sebastien Guay     jean-sebastien.guay at polymtl.ca

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