[Paraview] animation: files, pgmable source

[Heiland, Randy]

Utkarsh,

Thanks very much for that!  Yes, after some fiddling, I got it to work, i.e., I can save .png files for an animation! So now that I’m using the Programmable Source(RequestInfo) script to accomplish the animation, how do I, during a PV session, *easily* switch back to render a single file?

For example, I can do:
frames = range(0,801,100)   #  render every 100th frame, including 800
setOutputTimesteps (self, frames)

or, I can explicitly list specific frames:
frames = [100,101]

so, I thought this would do a single file, but it doesn’t (my previous frames are still there):
frames = [600,]

-Randy



> On Dec 6, 2017, at 10:44 PM, Utkarsh Ayachit <utkarsh.ayachit at kitware.com> wrote:
> 
> Randy,
> 
> You attempting to mix the Python scripting for data processing and
> Python scripting for batch scripting. The two environments are
> separate. Here's how I'd tackle it.
> 
> 1. Make your "Programmable Source" become a temporal source i.e.
> report to ParaView that it can produce timesteps matching the files
> your file series. See [i]. If you get this right, you shuold be able
> to render through all the files by hitting "Play" in the VCR control
> in the UI.
> 2. Now you can write a batch script that either loads the predefined
> pvsm state file or builds up the pipeline in Python itself and the
> either uses `SaveScreenshot` or `SaveAnimation` to save out the
> animation.
> 
> You can then mix in camera animations too. You can always use the
> Python tracing in UI to figure out how to save images and/or animation
> in the batch scripting environment.
> 
> Hope that helps.
> Utkarsh
> 
> [i] https://blog.kitware.com/defining-time-varying-sources-with-paraviews-programmable-source/
> 
> On Wed, Dec 6, 2017 at 11:15 AM, Heiland, Randy <heiland at iu.edu> wrote:
>> I’m probably missing a basic concept and hoping someone can enlighten me. I
>> have a pipeline with a Programmable Source that reads in a (non-VTK
>> formatted) file, I process it and then I have filters in my pipeline that
>> act on that data. I want to be able to feed multiple files to the pipeline,
>> save images and/or create animations. I naively created a Python function in
>> the Pgmable Source, then save the PV State to a Python script, thinking I
>> could call the function from the end of that script. Doesn’t seem to be
>> possible. And I confess I’ve not given this deep thought - it’s easier to
>> ask the experts :-)  Bottom line, we want to make this as dead simple for
>> our own users.
>> 
>> Fwiw, I’ve zipped up 2 files - a .pvsm and a sample data file here:
>> http://pages.iu.edu/~heiland/physicell/pv_pcell.zip . You’d need to edit the
>> “dir” path in the Pgmable Source.
>> 
>> Initially, I just want to save images/animation (over multiple files) with a
>> fixed camera view; later, it’d be nice to have simultaneous camera movement.
>> 
>> thanks, Randy
>> 
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