[ODE] contact joints / attaching them

[Steve Baker]

Flavien Brebion wrote:
> I don't see why. The collision detection functions are completely
> independant of the timestep. Notice that the time step parameter
> isn't even involved in collisions

It isn't?   How can the system tell whether a ball thrown at a
wall - which is on one side of the wall at the start of the timestep
  - and on the other side at the end of the timestep?

If the ball is in one 'world' and the wall is MOVING and in another
world - then having variable timesteps becomes a nightmare.

Also, the force of the ball hitting the wall affects both the
ball AND the wall - so if they are in different timestep worlds,
life would probably get VERY complicated.

---------------------------- Steve Baker -------------------------
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