VMD-L Mailing List

From: Olaf Lenz (olenz_at_icp.uni-stuttgart.de)
Date: Mon Apr 22 2013 - 01:44:15 CDT

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Hi Farrokh!

On 04/21/2013 05:33 PM, farrokh yousefi wrote:
> Can VMD displays ellipsoidal particles?

As Axel already wrote, VMD cannot do so directly. instead, you would
have to combine other graphical objects to display an ellipsoid.

If you are mostly interested in displaying the director of the
ellipsoid, I have started a VMD plugin "moregraphics" that contains
routines to create more complex graphics from graphical primitives, like
for example arrows, double cones or two spheres with different colors
that overlap each other:

  https://github.com/olenz/moregraphics

If you need more than that, you need to think about how to triangulate
the surface of an ellipsoid and use triangle primitives to create it. It
might be, however, that computing the surface points might become pretty
slow when doing it in Tcl.

If you do so, I would be happy if you could add that function to the
"moregraphics" plugin!

Olaf

- --
Dr. rer. nat. Olaf Lenz
Institut für Computerphysik, Allmandring 3, D-70569 Stuttgart
Phone: +49-711-685-63607
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