RE: [PyMOL] Geowall Testing

[EPF \(E. P. Friis\) <EP...@no...>]

Ahaaaa...=20

That make things a bit clearer :-)  We do have a geowall, but the Linux =
driver supplied by Nvidia directly supports sending the left and right =
images of the quad-buffered stereo to the two separate video heads on =
the card, which are then connected to the two projectors. This =
eliminates the need for the very expensive active-to-passive stereo =
converter. This do require a Quadro-card, though. It is not supported by =
the cheaper GeForce cards.=20

I think the Linux driver also support the type of stereo you mention =
here: Making a kind of side-by-side stereo, which is then converted to =
"real" stereo by doubling the desktop width, and splitting desktop =
between the two heads. I haven't tried, but I guess that is also =
supported by the GeForce cards. If it is not too difficult, I'll give it =
a try!

I would argue that even though you can save a few hundred bucks =
(difference between a Quadro and a GeForce card), the Quadro card =
solution is easier. A Quadro FX 1300 card is around for about $300-400, =
which is still small compared to the Geowall system. But for Mac (and =
maybe Windows?) users, this driver option may not be available.=20


Cheers

Esben


-----Original Message-----
From: Warren DeLano [mailto:wa...@de...]
Sent: Mon 2005-10-17 22:43
To: EPF (Esben Peter Friis)
Subject: RE: [PyMOL] Geowall Testing
=20
Esben,

If that is the case, then you don't actually have a "Geowall" -- you
have a professional stereo device setup that converts the active-stereo
signal sent from the nVidia cards into a passive-stereo signal for the
two projectors.  That's equivalent to QBS stereo on a CRT with glasses,
but typically costs quite a bit more (as much as $50k USD)

Geowalls are a low-end alternative the geologists came up with a few
years back.  Instead of requiring a stereo-capable video card, they use
a normal (not necessarily stereo-capable) dual-headed video card to
drive two projecters straight from the PC.=20

That can bring the cost down to under $5k total, but it means that the
software needs to draw the complete image twice, including the GUI,
hence these changes.

Cheers,
Warren

--
Warren L. DeLano, Ph.D.                    =20
Principal Scientist

. DeLano Scientific LLC =20
. 400 Oyster Point Blvd., Suite 213          =20
. South San Francisco, CA 94080 USA  =20
. Biz:(650)-872-0942  Tech:(650)-872-0834    =20
. Fax:(650)-872-0273  Cell:(650)-346-1154
. mailto:wa...@de...     =20
=20

> -----Original Message-----
> From: pym...@li...=20
> [mailto:pym...@li...] On Behalf Of=20
> EPF (Esben Peter Friis)
> Sent: Monday, October 17, 2005 1:30 PM
> To: Warren DeLano
> Cc: pym...@li...
> Subject: RE: [PyMOL] Geowall Testing
>=20
>=20
> I'll try it when I get back to work tomorrow - but I'm a bit=20
> confused :-)  The features you mention, haven't they been=20
> part of PyMOL for some time already? We have active stereo=20
> glasses for our workstations, and use the same PyMOL version=20
> (0.99beta14) for those and the Geowall.
>=20
>=20
> Cheers,
>=20
> Esben
>=20
>=20
> -----Original Message-----
> From: Warren DeLano [mailto:wa...@de...]
> Sent: Mon 2005-10-17 22:06
> To: EPF (Esben Peter Friis)
> Subject: RE: [PyMOL] Geowall Testing
>=20
> Esben,
>=20
> Great!
>=20
> Added: support for the internal gui, pop-up menus, sequence=20
> viewer, and command line when using a passive stereo setup=20
> (versus active stereo setups that cost about 10X more).
>=20
> Can you try the build at http://delsci.com/beta?
>=20
> Cheers,
> Warren
>=20
>=20
>=20
> --
> Warren L. DeLano, Ph.D.                  =20
> Principal Scientist
>=20
> . DeLano Scientific LLC
> . 400 Oyster Point Blvd., Suite 213        =20
> . South San Francisco, CA 94080 USA=20
> . Biz:(650)-872-0942  Tech:(650)-872-0834  =20
> . Fax:(650)-872-0273  Cell:(650)-346-1154
> . mailto:wa...@de...   =20
>=20
>=20
>=20
>=20
>=20
> ________________________________
>=20
>         From: EPF (Esben Peter Friis) [mailto:EP...@no...]
>         Sent: Monday, October 17, 2005 12:58 PM
>         To: Warren DeLano
>         Subject: RE: [PyMOL] Geowall Testing
>       =20
>       =20
>=20
>=20
>         Yep - we have one, which we use mostly for PyMOL presentations
> :-)
>         Stereo already works great, so I'm curious what you=20
> have in mind. The computer connected to it is running Linux=20
> (Fedora Core 2) and uses an Nvidia Quadro 750GLX card.
>       =20
>       =20
>         Cheers,
>       =20
>         Esben
>       =20
>         -----Original Message-----
>         From: pym...@li... on=20
> behalf of Warren DeLano
>         Sent: Mon 2005-10-17 16:27
>         To: pym...@li...
>         Subject: [PyMOL] Geowall Testing
>       =20
>         PyMOL Users:
>       =20
>         Regarding "geowalls" [also known as dual-projector=20
> passive stereo setups
>         that use polarized lenses & glasses to deliver=20
> low-cost stereo 3D to
>         large audiences]...
>       =20
>         Does anyone have one set up right now who might be=20
> able to test a new
>         PyMOL build with improved geowall stereo support?
>       =20
>         Cheers,
>         Warren
>       =20
>         --
>         Warren L. DeLano, Ph.D.                  =20
>         Principal Scientist
>       =20
>         . DeLano Scientific LLC
>         . 400 Oyster Point Blvd., Suite 213        =20
>         . South San Francisco, CA 94080 USA=20
>         . Biz:(650)-872-0942  Tech:(650)-872-0834  =20
>         . Fax:(650)-872-0273  Cell:(650)-346-1154
>         . mailto:wa...@de...   =20
>       =20
>       =20
>       =20
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