[Chimera-users] Constrained movements

Elaine Meng meng at cgl.ucsf.edu
Wed Aug 7 10:34:45 PDT 2013

Hi Damien,
I think you can do it without Constrained Move. 

If you are doing the movements with the mouse, just make that cyan atom the center of rotation (for example, select it and use menu: Actions... Set Pivot), deactivate the white model if it isn't already, and proceed.

If you are doing the movements with turn/roll commands, those commands allow you to specify which models should move (regardless of activation status) and what center of rotation should be used.

I hope this helps,
Elaine C. Meng, Ph.D.                       
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Aug 7, 2013, at 9:14 AM, Damien Larivière wrote:

> Dear all,
> The image below shows 2 chains opened separately from 2 PDB files.
> I would like to move only the cyan chain. For that, I just have to deactivate the white chain. BUT I would also like to keep fixed a specific atom of the cyan chain, for instance the cyan atom in the red circle. This way this atom serves as a pivot point. 
> I know that I can use "Constrained Move". If I understand well, the "origin" is either 0,0,0 or the center of a model bounding box, not a selected atom.
> Is it possible to manage this?
> Many thanks for your help
> Damien

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