VMD-L Mailing List

From: Luis M. Sánchez (lmsp_at_uniovi.es)
Date: Sat Apr 21 2012 - 16:56:32 CDT

Hi,
Anaglyph stereo is a poor thing. However, it is the main option in
commodity hardware, which has replaced most workstations. For example, I
would like to provide out-of-budget stereoscopic vision gadgets for a
dozen computers that will be used in some short structural biology
courses. I am planning to test a pair of prism glasses for cross-eyed
stereo. Maybe they will work better than anaglyph glasses. However, I
suspect that they will be too distracting. So... perhaps I should casually
mention that magenta-cyan anaglyph looks doable. It requires adding the
blue channel to the frame that already has the red channel. Magenta-green
should be doable too, but it seems a worse option.

I apologize in advance, in case Dr. Stone or someone else eventually
decides to try one of these anaglyph variants, and the results aren't
better than conventional anaglyph.

There is a method for seeing 3D in a normal LCD screen, using cellophane (
http://individual.utoronto.ca/iizuka/research/cellophane.htm ). I tried it
and was disappointed. However, I have a different laptop now, so I will
try again. Did anyone else try it?

Thanks again

Luis M. Sánchez

On Sat, 21 Apr 2012 20:36:01 +0200, flavio seixas <oivalf_nix_at_yahoo.com>
wrote:
> Hi.
> What abou Zalman Stereo? It would be possible to implement it in future
> versions of vmd?
>
> This kind of stereo is much more friendly to user eyes and is being used
> in different kinds of visualization software like Coot and CCP4mg.
> Regards,
>
> Flavio
>
> --- On Fri, 4/20/12, John Stone <johns_at_ks.uiuc.edu> wrote:
>
>> From: John Stone <johns_at_ks.uiuc.edu>
>> Subject: Re: vmd-l: Anaglyph stereo with other colors
>> To: "Luis M. Sánchez" <lmsp_at_uniovi.es>
>> Cc: "VMD-L" <vmd-l_at_ks.uiuc.edu>
>> Date: Friday, April 20, 2012, 11:27 PM
>>
>> Hi,
>> It is certainly possible to implement anaglyph for
>> many other
>> other color combinations. The only issue is that once
>> you get
>> away from the classic red/cyan glasses, the number of
>> possible
>> color combinations gets pretty large. The only other
>> issue is that
>> VMD currently uses the OpenGL color channel mask feature to
>> implement
>> the anaglyph color scheme, and to do color combinations that
>> are not
>> composed of combinations of 0% or 100% contributions from
>> each of
>> red, green, and blue will require a different rendering
>> approach, which
>> means that it will incur much more development time than you
>> might expect.
>>
>> In the end, I think anaglyph is best thought of as the
>> stereo option
>> of last resort when nothing else is
>> available/feasible. I would rather
>> invest time improving the non-anaglyph stereo modes in VMD
>> than to put
>> a bunch of time and energy into improving the lowest quality
>> option.
>> That said, if enough people tell me they want improved
>> anaglyph stereo,
>> I would be happy to work on it.
>>
>> Cheers,
>> John Stone
>> vmd_at_ks.uiuc.edu
>>
>> On Fri, Apr 20, 2012 at 03:09:19PM +0200, Luis M. Sánchez
>> wrote:
>> > Hi,
>> > Red-cyan and red-blue anaglyphs are affected by the
>> chromatic aberration> of our eyes. If I use VMD's anaglyph stereo and
>> close
>> one of my eyes, the> red image is blurrier than the other one. Also,
>> most of
>> the red color is> lost.
>> >
>> > Nowadays there are better color combinations for
>> anaglyphs:> http://en.wikipedia.org/wiki/Anaglyph_3D
>> . Suitable glasses are also> available from Amazon and other companies.
>> >
>> > Is there an option to change the colors used by VMD's
>> anaglyp stereo? If> not, maybe we could have a magenta-cyan anaglyph
>> option
>> in the future?
>> >
>> > Thanks for a great program and best regards
>> >
>> > --
>> > Luis M. Sánchez
>> > IUOPA
>> > Edificio Severo Ochoa
>> > Campus del Cristo
>> > 33006 Oviedo
>> > Teléfono: 985 10 9620
>>
>> --
>> NIH Resource for Macromolecular Modeling and Bioinformatics
>> Beckman Institute for Advanced Science and Technology
>> University of Illinois, 405 N. Mathews Ave, Urbana, IL
>> 61801
>> http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
>> http://www.ks.uiuc.edu/Research/vmd/ Fax: 217-244-6078