[Paraview] Generate IDs

[Moreland, Kenneth]

Daniel,

As you have discovered, trying to “connect” data sets in this way after the clip filter is applied is problematic because it changes the locations of points and the structure of cells. It makes the grids no longer isomorphic or sub-isomorphic.

I would suggest one of two approaches. The first approach would be to combine all the data arrays into one data set before doing any of the extractions, thresholds, or clips. If all your arrays are on data sets with the exact same grid structure, then you can use the append attributes filter to combine the arrays of all these data sets into a single data set. Then the arrays will simply be available from the output of the clip.

If that approach will not work for some reason, a second approach is to use the resample with dataset filter. You can use this to sample the other data sets onto the clipped data set, which I think in the end gives you the effect you are looking for.

-Ken


From: ParaView <paraview-bounces at paraview.org> on behalf of Daniel Frisch <daniel.frisch.kit at gmail.com>
Date: Tuesday, January 31, 2017 at 1:20 AM
To: "paraview at paraview.org" <paraview at paraview.org>
Subject: [EXTERNAL] [Paraview] Generate IDs

Hello, I want to

- open an unstructured grid,
- view a sub-volume using the Threshold filter that selects a certain material
- apply some Clip filters to remove unwanted parts
- select everything I am seeing now
- and create an "Extract Selection" filter that can be used for other vtk files containing the same unstructured grid but other data arrays.

But the "GenerateIDs" filter removes the material array from the dataset so I can't apply the Threshold filter anymore. I see the "Extract Selection" works only with the current IDs anyway that are different from the original cell IDs due to the Clip filters.

How can I have a filter that extracts a certain set of cells that I define and apply it to other .vtk files?

Thank you very much in advance,
Daniel
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