logreg at free.fr
Sat Mar 17 07:48:49 MST 2007
huhu, i understand what appends ... the force i compute is along the normal of
the contact point ...
Then, for the sphere, force pass throught the sphere center !
Selon "Jon Watte (ODE)" <hplus-ode at mindcontrol.org>:
> There is no difference between a box body and a sphere body except for
> the mass distribution.
> What is the mass (or, rather, inertia tensor) of the sphere when "it
> doesn't work" ?
> Also, adding a force that points straight towards/away from the center
> of gravity will add no torque.
> / h+
> LR wrote:
> > Hi,
> > I've a question about dBodyAddForceAtPos:
> > using dBodyAddForceAtPos on a box (box is centered to its body, body is
> > on its joint axis), makes the box rotates around its joint axis. It seems
> > absolute force is decomposed to produce force AND torque ... (OK)
> > Doing the same thing on a sphere does not produce any torque ...
> > Is it notmal or i'm missing something ?
> > Thank you for your help.
> > LR
> > (if my explains are not enaught, i can produce video )
> > --
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