> -----Original Message-----
> From: Bill Hibbard [mailto:billh@xxxxxxxxxxxxx]
> Sent: Tuesday, December 16, 2003 7:38 AM
> To: Donna L Gresh
> Cc: visad@xxxxxxxxxxxxxxxx
> Subject: Re: center of rotation for three-d views?
>
>
> Hi Donna,
>
> > I have a three-dimensional view, and I am wondering, when I rotate
> > using the mouse (the default action), what is the "center of
> > rotation"? It doesn't seem to be the center of my object (which is
> > what I would like). Is there a way to change the center of rotation?
>
> The center of rotation for mouse rotations in a
> DisplayImplJ3D should be the origin of 3-D graphics
> coordinates. That is, (0.0, 0.0, 0.0) in (XAxis, YAxis,
> ZAxis). However center of your object may not be at this
> origin. It depends on the explicit or implict (auto-scaled)
> calles to setRange() for your ScalarMaps to XAxis, YAxis and ZAxis.
>
This center of rotation issue is one of interest to me. I think
navigation within 3D space using standard computer interfaces is a
problem that may be helped by the ability to dynamically change
the center of rotation. Is this possible in VisAD?
-Mike
--
Mike McCann (mccann at mbaridotorg)
Monterey Bay Aquarium Research Institute
7700 Sandholdt Road
Moss Landing, CA 95039-9644
Voice: (831) 775-1769 Fax: (831) 775-1646 http://www.mbari.org/rd/iag.htm
