[Chimera-users] Normal Modes, arrows and more...

Elaine Meng meng at cgl.ucsf.edu
Mon May 14 09:01:18 PDT 2007

Hi JD,
You can create a text file in the BILD format containing descriptions  
of arrows. Simply reading it into Chimera creates the objects. The  
BILD format is quite simple, see:


For example, the following four lines describe two arrows (I also  
attach this as a separate file for your convenience):
.color red
.arrow 2 1 2 5 0 0
.color cornflower blue
.arrow 0 0 0 1.234 3.066 -8.143 0.5 2.5 0.6

I imagine one could also create the objects directly using a python  
script, but at least to me, this seems easier.  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 May 14, 2007, at 8:30 AM, Jean-Didier Marechal wrote:
> I am trying to use chimera to draw arrows of the Normal Modes  
> vectors I
> previously calculated with charmm. I see different possibilities to
> provide chimera with the vectors, but how can I draw the arrows?

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