From: Axel Kohlmeyer (
Date: Fri Nov 17 2006 - 11:02:42 CST

On Fri, 17 Nov 2006, L. Michel Espinoza-Fonseca wrote:

MEF> Hi guys,
MEF> I'm trying to display a vector as an arrow, but my best approximation
MEF> right now has been a cone. I'm using the following to visualize such
MEF> vector:

please have a closer look at the manual. the best way to draw
an arrow is to combine a cone and a cylinder.

i suggest, however, you try the version in

as it tries to follow the style of vmd as close as possible.
this script takes advantage of the extensability of the vmd
draw command (which falls back to using graphics on the top molecule).

MEF> graphics top cone {-18.631001 2.933000 0.252000} {-18.088463 -0.328044
MEF> -20.981705} radius 0.400000 resolution 20
MEF> I would like to know if any of you know how to change such
MEF> visualization for an arrow. All comments will be greatly appreciated.

if you stop the graphics ids as returned from the graphics
command (or aforementioned draw commmands), you can replace
or delete those objects any way you want.


MEF> Thanks!
MEF> Michel

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.