From: Ivo Hofacker (ivo.hofacker_at_tbi.univie.ac.at)
Date: Mon Oct 06 1997 - 21:25:08 CDT

Hi Christoph,

You can't specify an arbitrary vector to rock around. Only the x y and z axis
are possible and the second argument to rock should be the single character x y
or z to sepcify the axis.
E.g:
rock x by 2 20
rock y by 2 20
rock z by 2 20
The way it's implemented, anything other than x,y,z is mapped to 'y'.

Cheers,
Ivo