[ODE] geoms having the same position

[Piotr Obrzut]

Hi,

MF> I haven't tested it, but it also seems as if it might end up being
MF> faster if you were to use the collision groups to set it up such that
MF> the world collided with everything but itself (since I think that
MF> rejection would happen earlier in the code than the dCollide function,
MF> right?) - but even this simple little mod will help a lot.

we already are making it this way for bodies and colliders, but still
in mentioned situation it didn't change performance much (although
for my smaller needs it was working nice)

-- 
greetings,
 Piotr Obrzut