the cheat approach with stage is to set obstacle_return to 0 for your robot models.

Toby

2009/7/25 Ruben Gerlach <ruben-gerlach@web.de>
Thanks for your quick response. As I do not need an absolutely realistic simulation, maybe there is some sort of cheat to just disable robot-robot collision with stage? That would be sufficient in my case.

Ruben


> -----Ursprüngliche Nachricht-----
> Von: "Richard Vaughan" <rtvaughan@gmail.com>
> Gesendet: 25.07.09 00:09:03
> An: playerstage-users@lists.sourceforge.net
> Betreff: Re: [Playerstage-users] Multiple robots sometimes getting stuck using wavefront


> On Fri, Jul 24, 2009 at 2:54 PM, Ruben Gerlach<ruben-gerlach@web.de> wrote:
> > Hello,
> >
> > I use several robots, all navigating with wavefront and vfh. On several occasions it happened that the robots got too close to each other and got stuck so that no robot could move until I moved them apart with the mouse.
>
> In general you can not guarantee to avoid stuck robots with these
> methods, or any method that does not consider robot-robot interactions
> somehow. Deadlocks are always possible unless you use some form of
> communication, explicit or implicit, to coordinate your robots'
> behaviour. This is quite an important idea to understand when working
> with any distributed system.
>
> > Can I somehow avoid this?
>
> Yes, with centralized planning or reliable broadcast communication.
> Obviously you pay a heavy price for either.
>
> The fun part in my opinion is working out how to make stuck robots
> quite *unlikely*, without resorting to global coordination. There are
> some neat ideas about how to do this, which this margin is too small
> to contain.
>
> Richard/
>
>
>
>
> > Thanks in advance,
> > Ruben
> > ______________________________________________________
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>
> --
> Richard Vaughan
> Autonomy Lab / Computing Science / Simon Fraser University
>
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