[Chimera-users] xforms, cpk scale

Elaine Meng meng at cgl.ucsf.edu
Thu Feb 8 13:06:44 PST 2007

Hi Randy,
(1) The CPK representation uses the VDW radii.  Several ways to  
change the VDW radii are listed here:

and of these, the command way is to use "vdwdefine":

(2) If you remain within the same session ("later" means you haven't  
quit Chimera in between, or if you have, you saved and then restarted  
a session), "savepos" and "reset" can be used to save collectively  
the model transformations (and scale, and clipping plane positions),  
and restore them:


If you want to quit Chimera in between and not save a session, see  
"matrixget" and "matrixset":


The matrices would just specify model rotation/translation and not  
the clipping plane positions or scale.
I hope this helps,
Elaine C. Meng, Ph.D.                          meng at cgl.ucsf.edu
UCSF Computer Graphics Lab and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Feb 8, 2007, at 12:52 PM, Randy Heiland wrote:

> Is there a command to scale sphere of a CPK rep?
> Is there a command to save the current viewing transformation to a  
> file and
> then read it back/apply it at a later time?
> Thanks, Randy
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> Chimera-users at cgl.ucsf.edu
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