[ODE] RE: Wheel rotation problem

[Peter]

> Peter wrote:
> 
> >Nick, did any of these experiments work? (i.e. get rid of the
> >wheel-bending problem)?
> 
> No I have not yet been able to rid myself of the wheel-bending problem
as
> you turn corners at high speed (I noticed the buggy_demo has the same
> 'subtle feature').
> 
> I tried (each sim step)...
> - dBodySetFiniteRotationMode()
> - dBodySetFiniteRotationAxis()
> 
> It reduced the problem but did not remove it completely.
> 
> I tried different combinations of contact values ERP, CFM & slip, also
> gravity, I have not yet try different wheel/body mass & geoms.  All my
> changes either increased or reduced bendy wheels but did not remove
it.
> 
> The problem is that bendy wheels make my 'car' impossible to control
...
> it looks like someone attached the wheels with a rubber band ...
hilarious
> fun if thats the sort of game I was trying to write ! :)

That was pretty much exactly the results I got - this problem has
completely killed my ODE project. 


> (russ/ode_users?) Why is it not possible to totally stop the hinge2
> 'axles' becoming 'bent' ?

The question has been asked a lot of times, but it seems the only people
who ever discuss it are people (like me) who want to use ODE, but don't
know enough physics to fix it (sheesh! I find comprehending ODE hard
enough for my little brain!)

But it *would* be nice if Russ or someone else equally en-clued could
chime in?


Cheers,

Peter.