From: Axel Kohlmeyer (
Date: Tue Feb 10 2009 - 16:53:19 CST

On Tue, 10 Feb 2009, Roland Schulz wrote:

RS> Hi,
RS> says it is possible to
RS> produce Flow Fields with the Field Lines Representation. How do I generate
RS> the volume data with the velocities? I would like to visualize flow fields
RS> of water around a macromolecule.


all you need is the data on a regular grid in one of the
supported formats, e.g. .cube, .dx (note: the 1.8.6 version
requires a special formatting). or generate the grid in
tcl (or python?) and then set it directly from within vmd.
in tcl you can use the "mol volume" command, see the readcube
script in the vmd script library.


RS> Thanks
RS> Roland

Axel Kohlmeyer
   Center for Molecular Modeling   --   University of Pennsylvania
Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323
tel: 1-215-898-1582,  fax: 1-215-573-6233,  office-tel: 1-215-898-5425
If you make something idiot-proof, the universe creates a better idiot.