From: Jason Bryan (jbryan++at++osc.edu)
Date: 07/19/2001 06:19:17
we had a similar problem with our Virtual Research V8. after extensive
communication with SGI, it turns out the lowest resolution supported by
the Octane2 hardware is 1024x768. therefore, no video format does or
will exist. to circumvent this problem, we had to use a device from
Folsom Research.
(http://www.folsom.com/Product_page/video/ScreenPro/body_screenpro.html)
we had to create 2 connections from the Octane2 to the ScreenPro (DVI to
VGA to BNC), and then set up the ScreenPro to take 2 arbitrary 640x480
portions of the 1024x768 feeds and send them to the HMD. it worked, but
the solution is needlessly complex (and expensive). there are other
similar ways to do active clipping/scaling of 2 video signals/formats for
VGA compatability, but this was the cheapest solution we could find. the
Octane2 is a nice little box, but it would be even nicer if it supported
VGA. oh well. i guess we'll just have to wait for the Octane3 ;-)
On Wed, 18 Jul 2001, Michael Logan wrote:
> Sorry for the non-performer-like question, but I could use some
> advice on how to use my HMD on the Octane2.
>
> I want to drive a N-vision VGA HMD and there aren't any VGA
> formats to choose from. The lowest res is 1024x768.
>
> Does anyone have an Octane2/V12/Dual-channel video format
> for 640x480?
>
> Will the VPro*.def files in the /usr/gfx/vfc/rules directory and
> VFC-1.2 allow me to do what I want?
>
> Cabling is another issue, but I'll keep searching the net on that
> topic...8)
>
> thanks,
>
> Mike Logan
>
> Human Factors Research Laboratory
> NASA Ames Research Center
> Moffett Field, CA
>
> -----------------------------------------------------------------------
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>
+--
|
| Jason Bryan
| Director of Software Development
| Interface Lab - Ohio Supercomputer Center
| 1224 Kinnear Rd
| Columbus, Ohio 43212
| (614) 292-1051
| www.osc.edu/Biomed
|
+--
|
| Discovery is seeing what everyone else has seen
| and thinking what no one else has thought.
| - Albert Szent-Gyorgi
|
| Anyone who has never made a mistake has never tried
| anything new.
| - Albert Einstein.
|
+--
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