[Paraview] Calling the calculator filter repeatedly inside a for-loop

[pat marion]

Hi George,

To execute a filter from python you can call UpdatePipeline().  This is just
like clicking the Apply button.  So for your code it would be
CalculatorX.UpdatePipeline().  But your loop isn't going to do what you
want.  Filters operate on their input data and output new data, they do not
modify their input data in place.  If you call the calculator filter 10
times, it's going to produce the same output each time unless its input has
changed.

Pat

On Sun, Nov 28, 2010 at 2:33 PM, George <george.gerber at gmail.com> wrote:

> Hi paraviewers,
>
> I am trying to write a python script where I call the Calculator filter
> repeatedly inside a for-loop.
> However, I am not quite sure how to write this for paraview. At the moment
> my code looks like this:
> ~~~~~~~~~~~~
> try: paraview.simple
> except: from paraview.simple import *
> paraview.simple._DisableFirstRenderCameraReset()
>
> # Data Processing
> Coarse = OpenFOAMReader( FileName='C:\\Users\\Public\\Mesh.OpenFOAM' )
> Coarse.CellArrays = ['U', 'U_0', 'p']
> Coarse.MeshRegions = ['internalMesh']
> SetActiveSource(Coarse)
> CalculatorX = Calculator()
> CalculatorX.AttributeMode = 'point_data'
> CalculatorX.Function = 'p'
> CalculatorX.ResultArrayName = 'Result'
>
> # A hypothetical for-loop where I repeatedly add the array 'p' to the array
> 'Result'
> for i in range(10):
>    CalculatorX.Function = 'Result+p'    #( Result = Result + p)
> ~~~~~~~~~~~~
> The above script will not work in paraview as is.
> Can anyone tell me the proper way of writing this in Python?
>
> Thank you very much,
> George
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