VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Fri Mar 18 2011 - 13:09:41 CDT

Nicolas,
  Can you send me your VMD saved state file and matching structure file(s)
so I can reproduce the exact behavior you're seeing? The dashed lines won't
scale down to nothingness like the old ones did when zooming far away
from the molecule, but I hadn't come across a case where it created
a problem in a real scene previously. If you can send me your files I can
make changes to the dashed line rendering loops while still preventing
the kinds of "degenerate cylinder" problems that occured with POV-Ray
with the old implementation under the same "zoomed out" scenario.
I made the same changes to all of the renderer subclasses, so although
the changes were intended primarily to benefit POV-Ray, they all
behave the same way.

Cheers,
  John

On Fri, Mar 18, 2011 at 10:58:27AM +0100, Nicolas Sapay wrote:
> Hello,
>
> I experience some difficulties to crender Hbonds with POV-Ray and the
> latest version of VMD. The "dashes" of dashed lines are no more function
> of the distance between the donor and the acceptor, but of the same size
> of it. Consequently, donor-acceptor distance is filled by a first dash
> while a second dash emerges from the donor or the acceptor. This issue
> also occurs with (internal) Tachyon. I tried with my previous version of
> VMD (1.8.7) and everything is fine. Is there an easy way to fix this? I
> could draw the dashed lines myself using the graphics commands, but that
> would be extremely tidy as I have many pictures to render.
>
> Cheers,
> Nicolas 

-- 
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