VMD-L Mailing List

From: Filip Persson (filip.persson_at_gmail.com)
Date: Wed Sep 07 2011 - 08:30:33 CDT

Hello,
Is it possible to draw the intersection volume (i.e the "overlap volume")
between two spheres in VMD? Could one use Boolean expressions to do this,
something like "draw sphere {x1 y1 z1} AND sphere {x2 y2 z2}"?

I also want the spheres to be centered on specific atoms in my trajectory -
how do I update the center position of a sphere in every frame? I tried
using

*set atomX [atomselect top "index X"] *
*set pos [$atomX get {x y z}]*
*draw sphere $pos radius 3 resolution 10*

for every new frame, but I get the error "need three numbers for a vector".

I really appreciate your help!

Best,
FIlip