Ok, maybe you should look at ultra wide band applications such as Ubisense.
They use an active RFID tag (as opposed to passive tags) to track objects.

sophia


On Mon, Mar 3, 2008 at 5:23 PM, Tom Longson (nym) <[EMAIL PROTECTED]> wrote:

> Thanks Sophia,
>
> I'm familiar with blocking, but I'm actually referring to doing the
> tracking of objects, not the planning. For example, what if you wanted to
> track an actor with a light automatically, or find out if an actor is
> waiting off stage for their entrance. Basically some kind of device like a
> wireless microphone that transmits, and is able to be rapidly located.
> Basically an Indoor Positioning System that is lightweight, precise, and has
> quick updates.
>
> Cheers,
> Tom Longson (nym)
>
>
> On Mon, Mar 3, 2008 at 1:30 PM, creta kano <[EMAIL PROTECTED]> wrote:
>
> > Tom,
> >
> > The process of positioning actors on a stage is called blocking:
> > http://en.wikipedia.org/wiki/Blocking_(stage)<http://en.wikipedia.org/wiki/Blocking_%28stage%29>.
> >   Is this what your friend is interested in?  Positioning of props is
> > typically derived after blocking.
> >
> > sophia
> >
> > On Mon, Mar 3, 2008 at 3:41 PM, Tom Longson (nym) <[EMAIL PROTECTED]>
> > wrote:
> >
> > > Hi,
> > >
> > > Has anyone here ever done or heard about object positioning? A friend
> > > asked me if I knew how to keep track of actors on a stage, and I'm not 
> > > sure
> > > if anything like this has been done so far. He also was interested in 
> > > doing
> > > it for props.
> > >
> > > Cheers,
> > > Tom Longson (nym)
> > >
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