[Chimera-users] Stereo using X11 versions

Greg Couch gregc at cgl.ucsf.edu
Thu Mar 8 16:33:56 PST 2007

On Thu, 8 Mar 2007, Eduardo Sanz Garcia wrote:

> I have had problems using the stereo capabilites of chimera using stereo 
> glasses.
> I have two computers:
>   * Mac G5 Quadro PPC + Nvidia FX 4000 with the latest drivers +
>     Chimera X11 version 1.2304
>   * Fedora Enterprise 2 x Intel Xeon + Nvidia FX 3500 with the latest
>     drivers + Chimera Linux 32-bit version 1.2349
> The stereo hardware is correctly installed.
> I have other applications (X11 pymol) that display stereo nicely in both 
> systems.
> On the mac, I have been able to display things in stereo but it crashes or 
> displays weird stuff on the screen.
> On linux, I haven't been able to display things in stereo.
> Any suggestions?

Not sure what's different about chimera, the stereo code is generic 
quad-buffered stereo OpenGL code.  We don't have a stereo Mac (yet), so I 
can't test it directly, but the Linux version works fine, so I would 
expect the Mac version to be the same.  You might try running chimera with 
the --nomultisample option to see if that helps.  There were multisampling 
bugs on the Mac, but I thought they were fixed.

Please file separate bugs with chimera's Report a Bug dialog (in the help 
menu) and attach the output of the /usr/X11R6/bin/glxinfo command (on both 
Linux and the Mac) and, for Linux, the contents of /etc/X11/xorg.conf and 
any __GL* environment variables you have set, and, for the Mac, the output 
of "defaults read com.apple.x11".  And I will try to figure it out.

 	Greg Couch
 	UCSF Computer Graphics Lab

P.S.  Are you starting up chimera with the --stereo option or are you 
switching into "sequential stereo" with the Camera tool?  It shouldn't 
matter, but if only one works, it would be a clue.

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