Subject:
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Re: Spybot studies: seek a world object
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Newsgroups:
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lugnet.robotics.spybotics
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Date:
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Tue, 18 Oct 2005 14:53:33 GMT
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Viewed:
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11073 times
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In lugnet.robotics.spybotics, Steve Hassenplug wrote:
> On Tue, October 18, 2005 5:05 am, Allen Benter wrote:
> > perhaps you can help me with the directional capabilities. I have attached a
> > copy of my code below.
> >
> > I am reading the direction to another spybot/beacon and putting it through a
> > simple least squares adjustment. I find over short distance (HERE and maybe
> > THERE) I can get very good directions with as little as 5 consecutive sensor
> > readings. But when I extend this beyond the there zone (about 1m/3ft) I find
> > the spybot always reports direction as CENTER.
>
> I can't find it right now, but I thought I read somewhere that if the direction is
> "anywhere", it will not have a direction. I believe that's consistant with what
> you're seeing.
>
> Steve
Steve,
I think your right. A quick look into the ROM documentation shows "Sub Index 83
(p.139) TurnAway_Bead - Tries to turn the Spybot away from the target. If there
is no target, or if the target is in the Anywahere zone, the bead exits
immediately." This is similar for bead 84 - Advance_Bead.
The PointTo_Bead (#82) just spins left if the target is in the anywhere zone,
most likely just waiting for the target to get closer into the there/here zone.
And yet there are examples of people apparently getting directional readings at
2 metres? http://www.brickshelf.com/cgi-bin/gallery.cgi?i=574934
Anyway, until somethig more concrete comes up, I'll just have to limit the focus
down to the there/here zones.
Thanks again for your reply Steve. If you find the reference, I'd still be
pleased to read it.
Cheers,
Allen
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