VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Fri Aug 06 2010 - 09:23:02 CDT

Nicolas,
  The glowlights script simply adds distance-attenuated lights to
the VMD scene at the user-specified locations. You could certainly
replace existing atoms with lights, though the typical use is just to
add some lights near regions of interest, as you suggest below. Since
the added lights can be attenuated rapidly with distance, their lighting
contribution is primarily local, or short-range, affecting only the parts
of the scene nearby. At present this is implemented as a script just for
Tachyon renderings, but I plan to add some kind of built-in glow light
support to VMD in a future version, when I get a chance to write the
corresponding OpenGL code.

Cheers,
  John

On Fri, Aug 06, 2010 at 03:41:47PM +0200, Nicolas Sapay wrote:
> Thanks,
>
> I should be able to easily modify your script for my own purpose. By the
> way, does the existence of "glowlights.tcl" means that Tachyon will be
> able to transform an atom (i.e. a van der Waals sphere) into a glowing
> sphere? That could be an interesting feature to highlight an
> interaction, for example.
>
> Nicolas
>
> John Stone a écrit :
> >Nicolas,
> > I haven't tested the script with POV-Ray, but if it isn't already
> >right-on, you can hack/modify the coordinate transformations in
> >my Tachyon script here to do the same for POV-Ray. See the glowlights
> >script I've attached to this email.
> >
> >Cheers,
> > John
> >
> >On Wed, Aug 04, 2010 at 11:01:20AM +0200, Nicolas Sapay wrote:
> >
> >>Hello,
> >>
> >>I wish to render a picture with a focal blur effect using POVRay. The
> >>focal point corresponds to the geometric center of an atom selection.
> >>How can I convert its PDB coordinates into POVRay coordinates?
> >>Actually, there is a second layer of complexity to my problem. I also
> >>wish to display periodic images of my system, which will put the focus
> >>point on the front periodic image, i.e. center + box length in PDB
> >>coordinates.
> >>
> >>Thanks,
> >>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