[Chimera-users] pivot point
meng at cgl.ucsf.edu
Thu Apr 30 12:25:21 PDT 2009
On Apr 30, 2009, at 10:51 AM, Tatyana Fedotova wrote:
> Dear Mrs. Meng,
> I have a question about pivot point.
> Could you explain howfor example I can rotate part of a helix from a
> chosen pivot point.
> I fount how I can selet and move atoms. But that's not what I need.
I can think of two ways to move only part of a structure rather than a
(a) by rotating bonds, see Adjust Torsions, where the bonds define the
(b) with Movement Mouse Mode, which is probably what you were talking
Although method (b) does not include control over the center of
rotation (pivot point), you can set the center of rotation before
using that tool. You can set the center of rotation to an atom or
centroid of a set of atoms by selecting the atom(s) and using
"Actions... Set Pivot" in the menu. Or, you can use the "cofr"
command to do the same thing, or if you have a fairly recent version
of Chimera (1.4, so a daily build), specify particular X,Y,Z
coordinates as the center.
The center of rotation set as described above also applies when you
are rotating whole models. In newer versions of Chimera (1.4), the
rotation commands "roll" and "turn" also allow specifying the center
to use when executing that command.
Please send Chimera questions to chimera-users at cgl.ucsf.edu rather
than my personal address, unless you are describing private data.
Even though I answer a lot of those messages, I might be sick, or on
vacation, or not know the answer!
Elaine C. Meng, Ph.D. meng at cgl.ucsf.edu
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco
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