[Chimera-users] Showing inertia axes

[Thomas Goddard]

Hi Giuseppe,

   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.

	Tom



> 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
>
> Thanks
>
> giuseppe
>


> 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
>
> http://www.cgl.ucsf.edu/pipermail/chimera-users/2009-April/003762.html
>
> but you would use the axes that the measure inertia command reports in
> the reply log.
>
> Tom
>
>
>> 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.
>> Thanks
>> Regards
>> giuseppe
>
>