Hi Andy,

Looks like passing the current time step into the UpdatePipeline calls made it 
work as expected. Sorry for the delay in reporting, it took a long time for the 
job to move through the queue!


Anyway, looks like it's working properly and I am getting the data as expected.


For future reference, should I always just pass the time in? Or are the 
possibly other, unintended side effects from that as well to watch out for?


Thanks again,


Tim


________________________________
From: Andy Bauer <andy.ba...@kitware.com>
Sent: Monday, February 13, 2017 11:30 AM
To: Gallagher, Timothy P
Cc: paraview@paraview.org
Subject: Re: [Paraview] Cataylst pipeline not updating

Hi Tim,

It's possible that there's something funky going on when the data set being 
passed through parts of the pipeline are empty. I'm hoping for the easy fix 
with passing in the time since I've know that has caused unexpected behavior 
before. If that doesn't solve your issue then I'll probably have to do 
something similar and run it locally to see what's going on.

Cheers,
Andy

On Mon, Feb 13, 2017 at 11:06 AM, Gallagher, Timothy P 
<tim.gallag...@gatech.edu<mailto:tim.gallag...@gatech.edu>> wrote:

The RequestDataDescription is the same as the default output from the script 
generator, so I didn't include it. The DoCoProcessing gets called every time 
step and the volumeIntegrals data is updated and written correctly every 
delta_t, so I'm confident in that part.


I will add the calls you suggested and re-run. It takes some time for it to 
evolve to the point something will happen -- I don't have it saving data 
frequently enough to run a quick test, I was expecting the pipeline to save it 
for me!


The other thing that occurred to me -- is there something about the Contour 
filter that turns it off/disables it when the pipeline is built and there is no 
surface at that contour level?


Thanks,


Tim


________________________________
From: Andy Bauer <andy.ba...@kitware.com<mailto:andy.ba...@kitware.com>>
Sent: Monday, February 13, 2017 10:56 AM
To: Gallagher, Timothy P
Cc: paraview@paraview.org<mailto:paraview@paraview.org>
Subject: Re: [Paraview] Cataylst pipeline not updating

Hi Tim,

Try adding in the current time to the UpdatePipeline() calls, e.g. 
*.UpdatePipeline(datadescription.GetCurrentTime())

It's tough to tell with RequestDataDescription() missing but I assume that 
DoCoProcessing() is getting called when you want, correct?

Let me know if that doesn't solve the problem.

Best,
Andy

On Mon, Feb 13, 2017 at 5:45 AM, Gallagher, Timothy P 
<tim.gallag...@gatech.edu<mailto:tim.gallag...@gatech.edu>> wrote:

Back with another question!


I have a pipeline that has 1 input and 4 outputs. The simplest is a 
IntegrateVariables filter hooked up to the input. Another branch of the 
pipeline goes through several PythonCalculator filters and a 
CellDataToPointData filter and then arrives at the three outputs:


1. The CD2PD filter is connected to a Contour filter with a single level, X. 
This is then connected to an IntegrateVariables filter (used to compute the 
area of the Contour) and a Writer.

2. The CD2PD filter is also connected to another Contour filter with a single 
level Y. This is connected to an IntegrateVariables and Writer just as in 1.

3. The CD2PD filter is sliced two times with each slice in a different render 
view to save images.


I have the coprocessor running every delta_t seconds. The initial 
IntegrateVariables filter is updated with UpdatePipeline and then the values 
are saved to disk. This works every step, no issues.


I then call UpdatePipeline on both of the Contour and both of the 
IntegrateVariables filters in 1 and 2. I check if the 'Area' field in the 
IntegrateVariables exceeds a threshold, and if it does, I save the Contour's to 
disk as a VTK file. This is not working correctly.


If I start the simulation from a point where the Contour's exist in the flow 
already, then everything works great and the Area field changes in time and it 
saves the Contour's.


However, if the simulation starts without the Contours already in the flow, the 
Area fields stay zero forever. It's as if the pipeline isn't updating or 
something. I have attached the DoCoProcessing function used. I don't see 
anything immediately obvious that would prevent it from updating or getting the 
correct values for the Area.


Am I missing something about how the pipeline or contour filters update?


Thanks,


Tim

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