VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Sat Jan 31 2004 - 16:47:43 CST

Charles,
  I've fixed the source of the coloring problem for Tachyon renderings,
I still need to do the same for other renderers, but it shouldn't
take long for me to finish those over the next week. I'm also hoping
to add the per-vertex-colored triangle feature into Tachyon so MSMS
renderings look as nice as they do in VMD itself. I'll email when a
test version with all the fixes is posted.

Thanks,
  John Stone
  vmd_at_ks.uiuc.edu

On Thu, Jan 29, 2004 at 06:40:15PM -0500, Charles_at_Schwieters.org wrote:
>
> Hi--
>
> I have noticed the following behavior in versions 1.8.1 and 1.8.2:
>
> there's an unfortunate feature of the new ribbons drawing method:
> while its shape is more visually appealing than the old ribbons
> method, it does not use as many colors in the ray tracing output, so
> that the discrete coloring is uglier.
>
> To see this:
> load a structure, and color by index, and use the ribbons and new
> ribbons drawing method - then render it using a ray tracer (I get the
> same results with povray and tachyon).
>
> % grep color trace.pov | sort | uniq | wc
> 58 344 2923
> % grep color newRibbons.pov | sort | uniq | wc
> 9 50 424
> % grep Color trace.dat | sort | uniq | wc
> 58 634 4305
> % grep Color newRibbons.dat | sort | uniq | wc
> 9 95 679
>
> One can see that the new ribbons versions contains fewer colors (9
> vs. 58). Would it be possible to change the newRibbons output code to
> use the larger number of colors?
>
> thanks--
> Charles
>
> --
> Charles Schwieters email: Charles.Schwieters_at_nih.gov
> www: http://schwieters.org/cds
> phone: (301) 402-4914 PGP key: http://schwieters.org/cds/pgp.txt 

-- 
NIH Resource for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
Email: johns_at_ks.uiuc.edu                 Phone: 217-244-3349              
  WWW: http://www.ks.uiuc.edu/~johns/      Fax: 217-244-6078