[Chimera-users] Row interleaved stereo and Zalman monitors under Linux

[Greg Couch]

On Fri, 12 Feb 2010, David Bhella wrote:

> Hello again!
>
> I have just installed a Zalman M220W monitor on one of our workstations 
> under OpenSuse 11.1, after a small amount of fiddling to get it working 
> with dual head mode it seems to be behaving. In Amira it gives beautiful 
> 3D, although the assignment of left and right eye views seems fairly 
> random, as Amira has the option to reverse left and right eye views this 
> is not a problem.  In Chimera however with row interleaved stereo I seem 
> to always get the views the wrong way around. It took me a while to work 
> out why it didnt seem to be giving good depth and it was quite 
> disconcerting to look at while viewing cryoEM 3D reconstructions, 
> however with a pdb file it was quite obvious that my right eye was 
> getting the left eye view. There only seems to be the option of 
> reversing the views for sequential stereo however....
>
> I would be grateful if anyone could advise me on how I can fix this.
>
> Many thanks,
> Dave

(This is another excellent candiate for a chimera bug report.)

Looking into this, I see that the Zalman uses the opposite convention than 
other row interleaved displays, it's right eye is on the odd scanlines, 
while others have it on the even ones.  So chimera should always get it 
wrong.  Not sure why other people have reported this as working.  I will 
add another stereo mode to compensate and I'll notify you when the bug is 
fixed.

BTW, the "simple" fix is to flip the glasses upside down :-).

 	- Greg