[Chimera-users] matrixget/set, keyframes, and interpolation

[Eric Pettersen]

Just a little addendum:  savepos positions are remembered in  
sessions, so you can develop your animation over several days if needed.

--Eric

On Jun 16, 2006, at 10:40 AM, Elaine Meng wrote:

> I previously replied just to Jonathan, but it was suggested other
> chimera-users might find the information useful:
>
> There are some undocumented extra features of the "reset" command in
> recent versions of Chimera (2006) that may have the desired effect.
>
> The standard behavior is that you can save the positions of models and
> give each set of positions a name (with the "savepos" command) and
> later return to any saved position with "reset."
>
> The undocumented (newer and less well-tested) behavior is that you can
> use "reset" to gradually interpolate from one saved position to  
> another
> over a specified number of frames.  The usage is:
>
>          reset position-name [#-frames [interp-method]]
>
> where the only interp-method currently available is "linear"
> This newer usage of the reset command may be changed, improved, and
> further developed in future versions of Chimera.
> Elaine
>
> "savepos" man page:
> http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/savepos.html
>
>
> On Jun 15, 2006, at 7:55 PM, Jonathan Hilmer wrote:
>
>> Does anyone have experience making movies in Chimera used more
>> advanced motions, besides the standard roll, rock, etc?
>>
>> My general idea is to use matrixget to output a series of matrices,
>> interpolate them in my standard Python environment (which is related
>> to the question from Vol 38, Issue 10), and create as output a  
>> Chimera
>> script composed of hundreds of 'matrixset' matrices.
>>
>> The Python Computer Graphics Kit (http://cgkit.sourceforge.net) will
>> give me the functions for quaternions, as would ScientificPython or
>> pythonOpenGL, but a quick review of their documentation suggests that
>> in any package it will be necessary to interpolate the rotation
>> separately from the translation: obviously it would be more  
>> convenient
>> if there is a package that can transparently interpolate the matrices
>> as provided by Chimera.
>>
>> Has anyone gone through this issue before, hopefully with some tips
>> for me?
>>
>> Thanks,
>> Jonathan
>> _______________________________________________
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>> Chimera-users at cgl.ucsf.edu
>> http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users
>>
> -----
> 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
>                       http://www.cgl.ucsf.edu/home/meng/index.html
>
>
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