[Chimera-users] hardware stereo switching between distal and proximal when rotating

Sabuj Pattanayek sabujp at gmail.com
Mon Aug 29 12:11:21 PDT 2011


By switching between distal and proximal views do you mean that the
left and right eye images are switching from front to back and back
again in sequential stereo when the model is rotated? Are you using a
Quadro 1400, 3400/3450, or 4000 and stereo on CRT? If so you might be
having the same problem I had :


One solution that worked for us was to downgrade the nvidia driver to
the very old version 100.14.23. This was basically the last driver
that nvidia released before making a large version jump to 169.xx . We
tried much newer versions of the driver as well as nvidia's legacy
driver but all exhibited the same issue except for the 100.xx series
which still seem to work with CENTOS5/RHEL5 kernels which was good. We
also could not duplicate this issue with other apps like MOE or Pymol.

I haven't tried Greg's command yet.

Sabuj  Pattanayek

On Mon, Aug 29, 2011 at 1:52 PM, Greg Couch <gregc at cgl.ucsf.edu> wrote:
> My guess is that the problem you are having is that the focal plane,
> basically where the molecule intersects the screen, is too far back, so
> when parts of the molecule are far out of the screen, your eyes are
> having problems converging, and you're getting an inversion.  To test
> this hypothesis, bring up the SideView tool, and switch to the "top"
> side view from the "right" side view.  You will then see a dashed line
> that represents the focal plane.  Drag the focal plane all the way to
> the near plane (the solid vertical line closest to the eye), and then
> try your rotating experiment again.  And please let me know if that is
> really the problem you're having.
> Automatically managing the focal plane in stereo is something chimera
> needs to do, and there is experimental support for that if you run the
> following Python code (either in the IDLE window, or place it in a .py
> file and open the python file within chimera):
>     chimera.viewer.camera.autoFocus = True
> But not all parts of chimera respect that setting, so it is still
> possible for the focal plane to get out of whack and you'll need to
> adjust it by hand.
>     HTH,
>     Greg
> On 08/29/2011 10:50 AM, frederick lee wrote:
>> dear chimera community,
>> i have experienced this issue for some time now. i don't think
>> this is happening with other software like pymol, dsvisualizer,
>> MOE, etc given the same computer and hardware setup.
>> somehow when viewing in hardware stereo mode (sequential
>> stereo), the model will switch back and forth between proximal
>> and distal views during rotations. is there a particular chimera setting
>> that will prevent such from happening. thanks much.
>> fred
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