[Chimera-users] Turning models on/off on a perframe basis

Elaine Meng meng at cgl.ucsf.edu
Wed Jan 24 12:42:36 PST 2018

Hi Lothar,
The perframe command does have an “interval” option to do something only at every Nth frame (N >1), but then how to interleave modeldisplay and ~modeldisplay?

Here’s a possibly crazy idea, and I really don’t know if it would work: make an alias that hides the model, waits N frames (e.g. 6 frames), and then shows it again.  Then use perframe to execute this alias every 2N frames (e.g. 12).  I guess it’s worth a try…
I hope this helps,
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Jan 24, 2018, at 8:58 AM, Esser, Lothar (NIH/NCI) [E] <esserlo at mail.nih.gov> wrote:
> Hi, 
>    in a short animation I would like to turn on/off a second model that is overlapping with the main model. The idea is to show differences by showing/hiding side chains of the second model. 
> I know I can turn off models with ~modeldisp #1  but I don't know how to do that properly in a perframe statement
> turn y 2 180
> perframe  "modeldisp #1 "  range 0,1 frames 180  # pseudo code 
> wait
> clearly range does not quite work and $1 is presumably not setup to be ~ or nothing.
> I want to turn #1 on/off say every 6 degrees. How can this be done ? 
> Thanks, 
>   Lothar 

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