[Chimera-users] Positioning changing over time

Marvin Albert marvin.albert at gmail.com
Thu Jul 21 05:38:43 PDT 2016


Hi Tom,

thanks a lot for the advice.
It turned out that I was loading in the files and then rotated them. And the rotation each time was around a slightly different center of rotation. Fixing the center fixed the problem.
However your solution 2 simplifies a lot of things for me!

Thanks again!
Best,
Marvin 



> On 18 Jul 2016, at 19:17, Tom Goddard <goddard at sonic.net> wrote:
> 
> Hi Marvin,
> 
>  The problem is that when you open a model and there are no currently open models then Chimera automatically recenters and zooms the camera based on the bounds of the model.  So every frame your script is recentering a little bit because the bounding box center for each of your models is slightly different.  Unfortunately there isn’t an option to tell Chimera not to recenter.  But there are 3 other approaches: 1) open the next model, then close the first model (requires awkward script), 2) Use savepos/reset to save and restore the postion (“savepos current ; close all” and the “open <nextmodel> ; reset current”), or 3) Open a model at the beginning, hide it, and just leave it open (“open <somefile> ; ~modeldisplay #0”, and later “close #1” instead of “close all”).  I’d go with solution 2.
> 
> 	Tom
> 
> 
> 
> 
> 
>> On Jul 18, 2016, at 1:54 AM, Marvin Albert  wrote:
>> 
>> Dear chimera users,
>> 
>> I was wondering whether any of you could help me with this simple problem: The aim is to make a movie displaying the evolution of predefined meshes over time (see attached python script).
>> 
>> Overall the script works and produces a movie. However the mesh gets displaced slightly between the different time points. This results in an annoying random wiggling.
>> I checked the original .wrl files and the indicated coordinates do have consistent positions (meaning the displacements are produced by chimera).
>> 
>> How can I get a smooth movie?
>> 
>> Might there be something unexpected happening when I repeatedly call runCommand(“open <file1.wrl>”) and runCommand(“close all”)?
>> 
>> Thank you so much in advance!
>> With kind regards,
>> Marvin
>> 
>> 
>> <chimera_movie.py>_______________________________________________
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