[Chimera-users] obtaining rotation angles

Dougherty, Matthew T. matthewd at bcm.tmc.edu
Mon Oct 6 14:08:19 PDT 2008

Hi Jaap,

If you export as a vrml file, the global transformation (same as an open inventor transform) is near the top in human readable text, after the lighting and background descriptions. 

keep in mind the chimera camera only points in the z-axis.  When you change your point of view, the camera is static and the object is globally transformed.  If you have a multi-body scenario, such that the individual bodies have independent dynamic trajectories, this can get complicated.

Should you want to import all of this information into another viz/animation program, other things must be done, depending on the package.  

Matthew Dougherty
National Center for Macromolecular Imaging
Baylor College of Medicine/Houston Texas USA

-----Original Message-----
From: chimera-users-bounces at cgl.ucsf.edu on behalf of Jaap Brink
Sent: Mon 10/6/2008 1:17 PM
To: 'Eric Pettersen'
Cc: chimera-users at cgl.ucsf.edu
Subject: Re: [Chimera-users] obtaining rotation angles

Thanks for the lightning quick response. Much appreciated.






From: Eric Pettersen [mailto:pett at cgl.ucsf.edu] 
Sent: Monday, October 06, 2008 1:09 PM
To: jbrink at jeol.com
Cc: chimera-users at cgl.ucsf.edu BB
Subject: Re: [Chimera-users] obtaining rotation angles


Another possibility is to use the "turn" command to turn the object
around an axis by a number of degrees that you specify, and then
determine the correct number of degrees by trial and error.




                        Eric Pettersen

                        UCSF Computer Graphics Lab




On Oct 6, 2008, at 9:34 AM, Elaine Meng wrote:

Hi Jaap,
Maybe the "matrixget" command would meet your needs; it writes out a  
transformation matrix, 3x3 rotation matrix + translation vector, for  
each model:

You can write it to a file or just to the Reply Log.  If to a file,  
you can later apply the transformation(s) by reading the file with the  
"matrixset" command (same man page as above).

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

On Oct 6, 2008, at 7:28 AM, Jaap Brink wrote:



I'm trying to figure out how I can obtain angles from chimera. I  

have a 3D object that I have to rotate in order to see certain  

features. I'd like to know those angles. Is there is a way to get  

this info?


Thanks in advance,


Jaap Brink


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Chimera-users at cgl.ucsf.edu


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