[Paraview] animation: files, pgmable source

[Utkarsh Ayachit]

Oops. I meant to say -- "I am a little confused here" :).

On Fri, Dec 8, 2017 at 10:10 AM, Utkarsh Ayachit
<utkarsh.ayachit at kitware.com> wrote:
> Hmm, little confused here? Why not keep the timesteps in the reader
> unchanged and explcitly do the timestep of interest and save
> screenshot?
>
> On Thu, Dec 7, 2017 at 10:51 AM, Heiland, Randy <heiland at iu.edu> wrote:
>> 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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>>