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Re: [SCIRUN-USERS] scirun apps in stereo?


Chronological Thread 
  • From: Jack Gundrum <jsg3@psu.edu>
  • To: Martin Cole <mjc@sci.utah.edu>
  • Cc: Chems Touati <chems@sci.utah.edu>, scirun-users@sci.utah.edu
  • Subject: Re: [SCIRUN-USERS] scirun apps in stereo?
  • Date: Thu, 06 Sep 2007 10:05:50 -0400
Martin,
Thanks for responding with more information. I have some experience with stereo since our group
has created 5 stereo capable labs here at Penn State. We have found that the Nvidia cards have a nice
option 4 called twinview clonemode stereo which takes a quad buffered active stereo signal (frame sequential stereo)
and splits the left and right eye between the 2 heads which when then feed to the projectors. We would like to get
SciRun running in stereo on our large screen to demo for interested faculty.

Let me first try to create stereo with option 3, even though this wont work in our lab it will give us a common starting place.


Cole wrote:
Ok so this really requires more information. Our stereo is set up for
shutter glasses. This means you need to have a display device that can
refresh quickly enough. (~120Hz) It sounds like you have this... This
gives us left and right eye at 60Hz each... I know we have made this
work at a lower refresh rate for a larger display. If I remember
correctly Option "Stereo" "3" is correct for shutter glasses.

When I first got this working on linux, I had to have a Quadro card to
get stereo enabled in the driver, I'm not sure if this is still true.
We attempt to get a context that supports stereo when you start up, if
you can get such a context the stereo button will not be greyed out.

I haven't done this myself for a number of years, but if you need
additional help I am happy to do so.

--mc


On Wed, 2007-09-05 at 13:25 -0600, Martin Cole wrote:
You want Option "Stereo" "3"

--mc

On Wed, 2007-09-05 at 14:07 -0400, Jack Gundrum wrote:
Hi Chems,
The Stereo option shows up in VMD for example but I did have to edit the code for ParaView and change the default stereo option from
red-green to "crystal eyes stereo" to get the frame sequential stereo to work.
What is the default stereo mode for SciRun??? My graphics driver is configured for stereo and it is working - see config file below

-------------------------------------------------------------------------------------------------------------------

nvidia-xconfig: version 1.0 (buildmeister@builder26) Mon Feb 26 23:37:58 PST 2007
  The NVIDIA X Configuration Tool.

This program is used to manipulate X configuration files, specifically to enable
  NVIDIA X driver functionality.

  Copyright (C) 2005 NVIDIA Corporation.

[root@vislab1 ~]# nvidia-xconfig -t

Using X configuration file: "/etc/X11/xorg.conf".

    ServerLayout "Default Layout"
        |
        |--> Screen "Screen0"
        |       |
        |       |--> Monitor "Monitor0"
        |       |       |
        |       |       |--> VendorName "Unknown"
        |       |       |--> ModelName "Unknown"
| | |--> HorizSync | | |--> VertRefresh | | |--> Option "DPMS"
        |       |
        |       |--> Device "Videocard0"
        |       |       |--> Driver "nvidia"
        |       |       |--> VendorName "Videocard Vendor"
| | |--> BoardName "nVidia Corporation G70GL [Quadro FX4500]"
        |       |
        |       |--> Option "TwinView" "true"
        |       |--> Option "TwinViewOrientation" "Clone"
| |--> Option "MetaModes" "1400x1050,1400x1050; 1280x1024,1280x1024"
        |       |--> Option "ConnectedMonitor" "dfp,dfp"
        |       |--> Option "Stereo" "4"
        |       |--> DefaultColorDepth 24
        |       |--> Modes "1400x1050; 1280x1024"
        |
        |--> InputDevice "Mouse0"
        |       |
        |       |--> Driver "mouse"
        |       |--> Option "Protocol" "auto"
        |       |--> Option "Device" "/dev/input/mice"
        |       |--> Option "Emulate3Buttons" "no"
        |       |--> Option "ZAxisMapping" "4 5"
        |       |--> Option "CorePointer"
        |
        |--> InputDevice "Keyboard0"
        |       |
        |       |--> Driver "kbd"
        |       |--> Option "XkbModel" "pc105"
        |       |--> Option "XkbLayout" "us"
        |       |--> Option "CoreKeyboard"
        |


    Extensions
        |
        |--> Option "Composite" "Disable"







 Touati wrote:
HI Jack,

I've been trying to understand this better myself. I've had some success with stereo video in SCIRun using an xorg.conf file that was provided to me by a vendor. Once the settings are configured correctly for your hardware, the stereo check box should be available in Viewer Options.

I think the important parts are the Modeline settings:

Modeline "1400x1050_96_GTF" 205.45 1400 1512 1664 1928 1050 1051 1054 1110 -HSync +Vsync

and the Monitor definition:

Section "Monitor"
        Identifier   "Monitor[0]"
        VendorName   "Monitor Vendor"
        ModelName    "DP8000"
        HorizSync    25.0 - 108.0
        VertRefresh  50.0 - 256.0

here is a link to the complete file:

http://solar.sci.utah.edu/software/SCIRun/stereo/xorg.conf.txt

I wish I could be more help. Hope this helps you get started towards a solution.



Regards,

//cheMs
-----------------------------------------------------------------------
Chems Touati
Producer and Motion Graphics Designer
Visual Supercomputing Center
chems@sci.utah.edu <mailto:chems@sci.utah.edu>
801.581.4772

SCI Institute, University of Utah
http://www.sci.utah.edu





On Sep 4, 2007, at 12:25 PM, Jack Gundrum wrote:

Hi,

I am trying to use SciRun in stereo but the radio button under Viewer Options to turn on stereo it is grayed out.
I use frame sequential stereo for other apps on my machine and would like to know how to run SciRun in stereo?

I am running Redhat EL 5 and my graphics card is an FX 4500 which I have set to run in twinview clonemode stereo. -any ideas would be helpfull
-thanks.

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