VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Thu May 04 2006 - 17:09:17 CDT

Hi,
  I don't have time to dig into this in detail just now, but my recollection
is that the only place you're going to find all of the pickables'
pick point coordinates in one place is in the display list, and even then
you're going to have to scan the display list for the various
DPICKPOINT and DPICKPOINT_I tokens which give the coordinates.
There may be a much better way, but you'll have to look for yourself
as I'm swamped with other activities until about May 20.

  John Stone
  vmd_at_ks.uiuc.edu

On Thu, May 04, 2006 at 03:12:16PM -0400, Chang Hu wrote:
> John,
>
> Is there any way I can get all the Pickables' 3D coordinate in the
> source code?
>
> Thanks,
>
> Chang
>
> John Stone wrote:
>
> >Chang,
> > I included some general information about the control flow of the
> >main VMD loop in the VMD Programmer's Guide, which you'll want to
> >become familiar with:
> > http://www.ks.uiuc.edu/Research/vmd/doxygen/execution.html#execution
> >
> >Once you've read that, see the VMDupdate() method docs:
> > http://www.ks.uiuc.edu/Research/vmd/doxygen/classVMDApp.html#a213
> >
> >...and the sources in VMDApp.[Ch]
> > // redraw the screen and update all things that need updating
> > int VMDApp::VMDupdate(int check_for_events) {
> > }
> >
> >
> >Without knowing more about what you're doing, I'm not sure which code
> >to point you at next, but I suspect that a relatively simple example that
> >relates well to what you're doing is the FPS indicator:
> > http://www.ks.uiuc.edu/Research/vmd/doxygen/classFPS.html
> >
> >Enjoy,
> > John Stone
> > vmd_at_ks.uiuc.edu
> >
> >On Thu, May 04, 2006 at 12:58:12PM -0400, Chang Hu wrote:
> >
> >
> >>Hi,
> >>
> >>I am trying to hack into the source code to render a ball and mouse
> >>cursor position in the OpenGL window. However I didn't find a way to
> >>refresh the screen or delete previous I drew. I remember there's some
> >>Tcl scripts like "graphics delete ...". Is there a way to do it in the
> >>source code?
> >>
> >>Thanks,
> >>Chang
> >>
> >>
> >
> >
> > 

-- 
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