[Chimera-users] Stereo projection

[Steven Ludtke]

Yes, we have done this before, though I don't remember with absolute  
certainty if we
did it with chimera. You don't use 2 video cards normally, but rather  
1 card with 2
outputs. Also, you will need one of the 'professional' cards where the  
driver supports
stereo in a window ie- NVidia Quadro (we didn't try ATI). The NVidea  
stereo drivers then
have a mode for this type of stereo, or at least that's my memory, it  
was a year or two
ago when we demonstrated this. You need:

2 identical projectors which permit geometry correction so their  
corners can be exactly aligned
2 polarizer plates. we got (http://www.3dstereo.com/viewmaster/pj-pfilt-3x3.html 
) for $20 a pair
linear polarizing glasses (from the same site)
Quadro or similar GFX card

Note that with this type of stereo, you could technically make this  
work with any old dual
output 3-D card, but you would have to write the visualization  
software so it would open
2 display windows with slightly different orientations that you could  
then manually (or
automatically) position on each of the 2 projectors.

We did this just as an initial proof of concept, and haven't managed  
to get back to it again,
though we keep meaning to, as it is MUCH cheaper than the commercial  
solutions. Oh, one warning,
the polarizer plates mentioned above are plastic, and the light energy  
put out by your typical
projector is quite substantial. We actually melted one of the  
polarizers on our first attempt,
despite using much of it's 3x3 inch surface area. ie - use a low power  
projector, or put the
polarizer between thick glass plates or somesuch...

> From: Magali Cottevieille <mc3077 at columbia.edu>
> Date: May 21, 2008 3:06:07 PM CDT
> To: chimera-users at cgl.ucsf.edu
> Subject: [Chimera-users] Stereo projection
>
> Hi,
>
> Is there any way, with two projectors piloted by two graphic cards, to
> send from Chimera the stereo left eye view onto one, and the stereo
> right eye view onto the other one ? These two projectors are meant  
> to be
> used with filters and special glasses to create a 3D view.
> Thanks for your help!
>
> -- 
> Magali Cottevieille, Ph.D.
> Howard Hughes Medical Institute,
> Department of Biochemistry and Molecular Biophysics,
> 630 W 168th St, P&S Black Building 2-221
> New York, NY 10032
>
> Ph:  (+1) 212-305-9521
> Fax: (+1) 212-305-9500
>
> Email: mc3077 at columbia.edu
>       magali.cottevieille at gmail.com
>
> _______________________________________________
> Chimera-users mailing list
> Chimera-users at cgl.ucsf.edu
> http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users
>
----------------------------------------------------------------------------
Steven Ludtke, PhD              |        Baylor College of Medicine
sludtke at bcm.tmc.edu             |     Associate Professor & Co-Director
stevel at alumni.caltech.edu       | National Center For Macromolecular  
Imaging
V: (713)798-9020                |    Dept of Biochemistry and Mol. Biol.
F: (713)798-1625                |
                                 |             Those who Do, Are
http://ncmi.bcm.edu/~stevel     |         The converse also applies