[ODE] Contact joints simulating rough surfaces

[Michal Bacik]

> On Thu, 27 Feb 2003, Michal Bacik wrote:
> 
> > How do I set-up contact joint which simulates highly-rough surface, for
> > example as if object was moving through grass? If I had sphere, 
> I'd like it
> > to stop very soon when moving on the surface.
> > Now, a sphere just rolls forever, without stopping.
> 
> The forces you're looking for do not come from contact joints, and/or are
> not part of "rigid body" dynamics (e.g. grass).  But, you can fake it by
> applying those forces yourself.
> 
> The rolling sphere thing comes up here often, AFAIK the usual solution is
> to apply a force proprotional to its velocity.

Thanks. How can I apply the force?
- mb