[Paraview] Programmable filter - input data and output data

[Cory Quammen]

Pierre,

First thing first. The code inside the Programmable Filter script runs in a
context in which it is aware of VTK only and not ParaView, so you cannot
use paraview.simple module functions such as Clip. Instead, you would need
to use a VTK-equivalent. In this case, you would use vtkClipDataSet:

import vtk

plane = vtk.vtkPlane()
plane.SetOrigin(-4.0, 0.0, 0.0)
plane.SetNormal(1.0, 1.0, 1.0)

clip = vtk.vtkClipDataSet()
clip.SetClipFunction(plane)
clip.SetInputData(input)
clip.Update()

Next, to use the output of the clip filter as the output of the
Programmable Filter, do the following.

self.GetOutput().ShallowCopy(clip.GetOutput())

Make sure you change the Output Data Set Type to vtkUnstructuredGrid if you
go this way.

Hope that helps,
Cory

On Wed, Jan 11, 2017 at 8:49 AM, Crepier, Pierre <P.Crepier at marin.nl> wrote:

> Hi everyone,
>
>
>
> I am trying to use the programmable filter to combine multiple filters.
> Sort of like the custom filter but I want to have control over some of the
> properties using user input.
>
>
>
> If I understood correctly, I can get the input data with:
>
> input = self.GetInputDataObject(0, 0)
>
>
>
> then I can use this input in a filter:
>
> xMin = Clip(Input=input)
>
> xMin.ClipType = 'Plane'
>
> xMin.Crinkleclip = 1
>
> xMin.ClipType.Origin = [-4.0, 0.0, 0.0]
>
> xMin.ClipType.Normal = [1.0, 0.0, 0.0]
>
>
>
> Now, how can I use the output of this filter as output of my programmable
> filter ?
>
>
>
> Thanks in advance,
>
> Pierre
>
> ir. Pierre Crepier | Project Manager Ships | CFD
> MARIN | T +31 317 49 34 75 <+31%20317%20493%20475> | P.Crepier at marin.nl |
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-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.
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