[ODE] rolling contact force

[Shamyl Zakariya]

Very true -- it's likely to create a lot of work. My best guess at this 
time has been to have the sphere emit a ray in the direction of contact 
when it contacts something, and then subsequently measure along that 
ray to determine if it's "close enough". But there's plenty of problems 
with that approach, as well.

I'll probably just have the spheres de-couple from ODE when they attach 
to something and subsequently be managed as non-physical objects from 
that point on.

Shamyl Zakariya
   "this is, after all, one of those movies where people spend a great
   deal of time looking at things and pointing."
	From a review of _Fantastic Voyage_

On Oct 9, 2004, at 7:07 PM, Dimitris Papavasiliou wrote:

> On Saturday 09 October 2004 05:25, you wrote:
>> I was expecting to use some sort of threshold, e.g., as long as it's
>> less than some distance it would stick.
>
> Well if the sphere doesn't actually touch the wall then you'll have to 
> compute
> the distance to all buildings etc. (that is do collision detection all 
> over
> yourself) in order to compare it to the threshold. If on the other 
> hand you
> make sure that the sphere sticks to the wall once it hits it (bounce = 
> 0)
> then all you have to do is add the force if there is a contact.
>
> Jon Watte also made a couple of interesting observations.
>
> Dimitris
>
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