VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Thu Dec 01 2005 - 15:06:44 CST

Hi,
  I've updated the docs as requested, they'll show up here when I do
the next website update for the VMD 1.8.4 info page:
  http://www.ks.uiuc.edu/Research/vmd/vmd-1.8.4/docs.html

  John Stone
  vmd_at_ks.uiuc.edu

On Wed, Nov 30, 2005 at 11:01:49AM +0100, Mario Valle wrote:
> Huge improvement! Thanks.
> Could the graphics page
> <http://www.ks.uiuc.edu/Research/vmd/current/ug/node114.html>
> be updated with delete all?
> Now the relevant code is
> # defer screen update
> display update off
>
> # delete an existing surface
> graphics $mol delete all
>
> # add triangles
> graphics $mol color $comp
> foreach line [split $data \n] {
> if {$line == ""} break
> eval graphics $mol trinorm $line
> }
>
> # update the display
> display update on
>
> Thanks again!
> mario
>
> Axel Kohlmeyer wrote:
> >On Tue, 29 Nov 2005, Mario Valle wrote:
> >
> >MV> In a small plugin I'm developing I need to create a different surface
> >for each animation step.
> >MV>
> >MV> The surfaces are create using a bunch of graphics $mol trinorm ...
> >calls.
> >MV> At each animation step I need to delete the surface created in the
> >previous step before MV> recreating the new one. Unfortunately this step
> >slows down considerably the animation.
> >MV>
> >MV> The only method I have found is:
> >MV> # delete an existing surface
> >MV> set glist [graphics $mol list]
> >MV> foreach gitem $glist {graphics $mol delete $gitem}
> >MV>
> >MV> Is there any more efficient method?
> >
> >at least for the deleting you can do
> > graphics $mol delete all
> >which should reduce the overhead.
> >
> >if you need to update only part of the graphics, you can save those
> >graphics ids while creating them, and then just use that list
> >of graphics ids to delete and recreate them. as in:
> >http://www.theochem.ruhr-uni-bochum.de/~axel.kohlmeyer/cpmd-vmd/part7.html#chap9_sect1
> >
> >MV> I create the graphics inside the Top molecule. Maybe it is faster to
> >create the graphics MV> inside a new molecule and then deleting it at each
> >animation step. Unfortunately using MV> this setup I have strange scaling
> >and translation of the resulting surface.
> >
> >hmmm, perhaps a suitable workaround would be to load each frame into
> >a different molecule and then use a script to hide/unhide them. as in:
> >http://www.theochem.ruhr-uni-bochum.de/~axel.kohlmeyer/cpmd-vmd/part7.html#chap9_sect5
> >
> >axel.
> >
> >MV>
> >MV> Thanks for your help!
> >MV> mario
> >MV>
> >MV>
> >
>
> --
> Ing. Mario Valle
> Visualization Group |
> http://www.cscs.ch/~mvalle
> Swiss National Supercomputing Centre (CSCS) | Tel: +41 (91) 610.82.60
> v. Cantonale Galleria 2, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82 

-- 
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