Re: [ccp4bb] Pymol movie ration along any axis

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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Pymol movie ration along any axis
From: Jerry McCully for-crystallizaiton {- at -} HOTMAIL {- dot -} COM
Date: 2008-08-02

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Subject: Re: Pymol movie ration along any axis
From: Juergen Bosch jbosch {- at -} U {- dot -} WASHINGTON {- dot -} EDU
Date: 2008-08-02

Subject: Re: Pymol movie ration along any axis
From: James Stroud jstroud {- at -} MBI {- dot -} UCLA {- dot -} EDU
Date: 2008-08-02

Jerry said:
> Does anyone have this experience of rotating molecules along any
> other specified axis and keeping the same view point as usual?

I have, but its complicated. (Interpolated) rotation about an
arbitrary axis is not a straightforward operation, especially if said
axis does not pass through the origin. You are well advised to
describe your rotation as a quaternion transformation, calculate the
interpolations in quaternion space, convert them to the pymol
"transformation matrices" (which are not conventional transformation
matrices) and apply those, saving frames as you go. But you can have a
lot of fun figuring out how to do it if you can spare the time.

It may be a simpler process these days though. That was a couple of
years ago.

James

On Aug 1, 2008, at 2:06 PM, Jerry McCully wrote:
> Hi , all:
>
> Sorry for this off-topic question.
>
> When you make movies, Pymol usually allows you rotate molecules
> along x, y, or z axis.
>
> The view point is always from Z axis.
>
> Does anyone have this experience of rotating molecules along any
> other specified axis and keeping the same view point as usual?
>
> Thanks a lot.
>
> Jerry

--
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
611 Charles E. Young Dr. S.
Los Angeles, CA 90095

http://www.jamesstroud.com

CCP4bb navigation

CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Pymol movie ration along any axis
From: Jerry McCully for-crystallizaiton {- at -} HOTMAIL {- dot -} COM
Date: 2008-08-02

Next message:
Subject: Re: Pymol movie ration along any axis
From: Juergen Bosch jbosch {- at -} U {- dot -} WASHINGTON {- dot -} EDU
Date: 2008-08-02