<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7653.38">
<TITLE>RE: [Chimera-users] DepthQ stereo projector</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/plain format -->
<P><FONT SIZE=2>I also took the theater emitter apart, looking for some kind of switch or jumper.<BR>
<BR>
I was surprised by the amount of electronics.<BR>
I expected the bank of power transistors to drive the ~30IR LED, the other stuff I did not expect.<BR>
<BR>
I need to contact the manufacturer, stereographics, about possible modifications.<BR>
<BR>
As for the frame delay sync problem between the projector and the CRT,<BR>
one solution would be a vga delay box, if it exists, where it inputs vga, buffers it and delays it by adjustment, and outputs vga. I will contact the crt manufacturer to see if they have some ideas.<BR>
<BR>
Right now we are experimenting with passive/polarized stereo, but that requires projectors.<BR>
So I am anticipating the continued need for active goggles for workstation situations.<BR>
<BR>
Another variable on the correct approach is the direction the entertainment/gaming/film industries.<BR>
<BR>
<BR>
<BR>
<BR>
Matthew Dougherty<BR>
713-433-3849<BR>
National Center for Macromolecular Imagingjavascript:EditRecip(1);<BR>
Baylor College of Medicine/Houston Texas USA<BR>
=========================================================================<BR>
=========================================================================<BR>
<BR>
<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: chimera-users-bounces@cgl.ucsf.edu on behalf of Tom Ferrin<BR>
Sent: Fri 8/15/2008 8:36 PM<BR>
To: Greg Couch<BR>
Cc: chimera-users@cgl.ucsf.edu<BR>
Subject: Re: [Chimera-users] DepthQ stereo projector<BR>
<BR>
One could also build a very simple circuit that just inverts<BR>
the stereo sync signal before it goes to the emitter. A single<BR>
transistor is all that's needed. The sync signal level is 0v-5v.<BR>
<BR>
--tom<BR>
<BR>
<BR>
> Just to follow up to the list. This is a generic problem for all OpenGL<BR>
> stereo applications due to the DepthQ projector delaying the images for a<BR>
> full frame. So what OpenGL thinks is the left eye comes out as the right<BR>
> eye and vice-versa.<BR>
><BR>
> The simpliest solution that fixes all stereo applications is to use a<BR>
> NuVision stereo emittor that lets you switch the left and right eyes.<BR>
> Otherwise, each stereo application needs an option to switch the eyes<BR>
> and currently, chimera lacks that option (to be fixed soon). In the mean<BR>
> time, only use the DepthQ projector with Microsoft Windows.<BR>
><BR>
> - Greg<BR>
><BR>
> On Thu, 14 Aug 2008, Greg Couch wrote:<BR>
><BR>
> > Chimera does not have an option to switch the eyes. Since it is a device<BR>
> > specific problem, we have expected it to be fixed by the device driver and<BR>
> > on other platforms, the device driver does have that option. Lightspeed,<BR>
> > who makes the DepthQ projector, is here at SIGGRAPH, so I'll stop by their<BR>
> > booth and learn more about the projector.<BR>
> ><BR>
> > - Greg<BR>
> ><BR>
> > On Thu, 14 Aug 2008, Matthew Dougherty wrote:<BR>
> ><BR>
> >> I have been using chimera/macAqua with sequential stereo with no<BR>
> >> problems on a CRT.<BR>
> >><BR>
> >> I am running into problems using the depth-q stereo projector because<BR>
> >> of the way their frame buffer works.<BR>
> >> Their left and right is inverted relative to the CRT.<BR>
> >><BR>
> >> On other packages I activate a left/right image swap to get around this.<BR>
> >><BR>
> >> Is there something I can do to achieve this on Chimera?<BR>
> >><BR>
> >> Matt<BR>
> >> National Center for Macromolecular Imaging<BR>
> >> _______________________________________________<BR>
> >> Chimera-users mailing list<BR>
> >> Chimera-users@cgl.ucsf.edu<BR>
> >> <A HREF="http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users">http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users</A><BR>
> >><BR>
> > _______________________________________________<BR>
> > Chimera-users mailing list<BR>
> > Chimera-users@cgl.ucsf.edu<BR>
> > <A HREF="http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users">http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users</A><BR>
> ><BR>
> _______________________________________________<BR>
> Chimera-users mailing list<BR>
> Chimera-users@cgl.ucsf.edu<BR>
> <A HREF="http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users">http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users</A><BR>
_______________________________________________<BR>
Chimera-users mailing list<BR>
Chimera-users@cgl.ucsf.edu<BR>
<A HREF="http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users">http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users</A><BR>
<BR>
</FONT>
</P>
</BODY>
</HTML>