[ODE] Box stacking and ODE

[Marc Rochel]

Hi !

I experienced the same problem, but switching to Step() only lets the stack
collide a bit later. Perhaps these "not yet implemented"-but-"already in
docu"-utility-functions of stepfast will help here? E.g. autodisabling of
the boxes might happen after a few iterations during which the stack doesn't
callapse.
I think as a first approach we could try to disable the stack-objects
manually at the beginning. So they won't collapse until some body touches
them. But in most cases the bodies should really collapse then. Didn't try
that, it just came to my mind thinking about autodisabling while writing
these lines.
But for some special situations where this stack is only touched slightly,
this will lead to collapsing without reason as before. Autodisabling would
prevent them from collapsing by redisabling them after a few steps.
Not sure about all that, perhaps autodisabling will be for something else.
Please tell me if I'm wrong.

ciao
    Marc

----- Original Message ----- 
From: "Megan Fox" <shalinor at circustent.us>
To: "W.J. van der Laan" <wj at goliath.darktech.org>; <ODE at q12.org>
Sent: Wednesday, April 14, 2004 12:50 AM
Subject: RE: [ODE] Box stacking and ODE


> At least one option is to use standard Step() instead of StepFast1() - at
> least for me, Step() results in no jittering of box stacks, though
> StepFast1() is of course much better for giant random piles of lots of
geoms
> (which'll make regular Step() quite unhappy).
>
> -Megan Fox
>
> > Hello,
> >
> > I keep having problems stacking boxes in ODE, stacks of boxes just
> > collapse after a while even if no force is applied to them, and the
> > surfaces have infinite friction (so there should be no "shifting". The
> > number of contact points doesn't seem to matter either.
> >
> > Even the crash demo (from CVS) currently experiences this. The boxes
keep
> > pushing each other, until the whole heap collapses.
> >
> > Can something be done against this?
> >
> > Wladimir
> > _______________________________________________
> > ODE mailing list
> > ODE at q12.org
> > http://q12.org/mailman/listinfo/ode
> >
> >
>
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