From: Sourav Ray (
Date: Wed Nov 04 2015 - 04:33:58 CST


I tried using geom_center to do that, but running the tcl or even proc
directly with the selection of atoms (as input) is not working. " invalid
command name 'geom_center'.

Also tried to shift the geometric center using the code below, but move
command is displaying error as "invalid command name <current geometric

set sel [atomselect top all]
set gec [measure center $sel]
$gec moveto {0 0 0}
$sel moveby [vecscale -1.0 $gec]
$sel moveby $gec

Thanks and regards
Sourav Ray