[Chimera-users] Showing inertia axes
goddard at cgl.ucsf.edu
Wed Feb 17 10:57:06 PST 2010
I've made the Chimera "measure inertia" command report the center of
the ellipsoid in the Reply Log. The output looks like:
Inertia axes for 3BQW.pdb
v1 = -0.363 -0.271 -0.892 a = 39.714 r1 = 14.386
v2 = 0.853 -0.482 -0.200 b = 26.633 r2 = 19.507
v3 = 0.375 0.833 -0.406 c = 18.039 r3 = 21.385
center = 34.324 8.2127 2.4621
This will be in tomorrow's daily builds.
> Hi Tom,
> thanks for the answer and sorry for the delay in the reply.
> I tried to use the approach you suggested, but my main problems to
> identify the point where to put the vectors origin.
> I hope you can help me
> Hi Guiseppe,
> I guess you are using the Chimera "measure inertia" command to show an
> inertia ellipsoid for specific atoms. There is not an option to show the
> principal axes as arrows. I'll add that to our feature request list. But
> you can do it now by hand if it is worth going to that trouble. You
> would use Chimera BILD format to draw the axes as in the following
> mailing list message
> but you would use the axes that the measure inertia command reports in
> the reply log.
>> Dear Chimera team,
>> I am using Chimera to create ellipsoids from specific sets of atoms.
>> The ellipsoids are shown in the graphic window as a surface model and
>> information about each ellipsoid are given in the reply log. In it the
>> ellipsoid vectors are reported among others info. I wonder if you have
>> a command to show vectors defining the ellipsoid instead of the
>> surface model in the graphic window.
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