[Chimera-users] Crossfade and disp

[Elaine Meng]

Hi Daniel,
The general command-file description mentions the implicit “wait" at end-of-line, and combining commands with semicolons:

<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/indexcommand.html#cmdfile>

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

On Dec 20, 2016, at 5:22 PM, Daniel Asarnow <dasarnow at gmail.com> wrote:

> Thanks, Tom!
> 
> Now, I understand why wait and crossfade work the way they do as well. I'll take a deeper dive into the docs and try and find it.
> 
> Best,
> -da
> 
> On Tue, Dec 20, 2016 at 1:59 PM, Tom Goddard <goddard at sonic.net> wrote:
> Hi Daniel,
> 
>   Yes there is a frame drawn between each command that is on a separate line in the Chimera command file.  So the crossfade you want should use commands
> 
> disp #2
> movie crossfade 25
> ~disp #2 ; disp #3
> 
> where the display of model #3 is done on the same line, separated by a colon, after the crossfade command.  You can put as many commands on a line as you want separated by semicolons.  These behaviors are documented although there is so much Chimera documentation it may be hard to find.
> 
> 	Tom
> 
>> On Dec 20, 2016, at 1:52 PM, Daniel Asarnow <dasarnow at gmail.com> wrote:
>> 
>> Hello Chimera experts,
>> Here is another movie making question. I noticed that disp and ~disp trigger frames to be recorded, without a call to wait.
>> 
>> For example:
>> 
>> disp #2
>> movie crossfade 25
>> ~disp #2
>> disp #3
>> 
>> This would produce a movie that crossfades from model #2 to blank, with #3 suddenly appearing.
>> 
>> To get crossfades between two ligands, I had to use:
>> 
>> disp #2 
>> movie crossfade 25
>> perframe "~disp #2" frames 1
>> disp #3
>> movie crossfade 25
>> 
>> Based on the documentation I wasn't sure if this was intended behavior or a bug. Did I miss a more elegant way to crossfade between two models?
>> 
>> Thanks,
>> -da