On Apr 20, 2011, at 10:49 AM, Tom Goddard wrote:

1) To rotate 3 volumes each about its own center you can use the 
"independent" center of rotation method, command "cofr independent".  
That won't allow you to easily initiate rotation of each model at a 
different time.  To do that it is simpler to just use the "turn" command 
to start each model rotating.  For example,

turn y 3 120 center #0 model #0
wait 60
turn y 3 120 center #1 model #1

will rotate model #0 about its own center in 3 degree steps for 120 
steps (360 degrees total) about the vertical screen axis.  60 steps 
after that has started (wait 60) model #1 will start rotating in the 
same way.

An alternative way to get the models to start rotating at different times is to use "cofr independent" like in the above but initially inactivate the models you don't want to rotate, something like:

cofr independent 
~sel 0 1 2
roll y
sel 0
wait 60
sel 1
wait 60
sel 2
wait 60
freeze

--Eric