[Paraview] Merging Coincident Faces

[Dominik Szczerba]

It's very easy to customize the existing vtkCleanUnstructuredGrid to
also merge coincident faces, I did it.

Dominik

On Wed, Jun 29, 2011 at 4:50 PM, Randall Hand <randall.hand at gmail.com> wrote:
> I'm working with an Xdmf dataset in ParaView 3.10.1 that has multiple
> unstructured-grid blocks with overlap regions, however doens't seem to
> actually have "ghost" cells.  This means when I extract an isosurface, I
> wind up with perfectly overlapping faces.
>
> I can use the Clean filter to eliminate coincident points, but but
> coincident faces.  As an example, if I use the "Select Cells Through"
> option to select 2 triangles on an overlapping border, I get 4 points
> (normal for 2 triangles) but 5 cells, with perfect overlap.  The results
> from an ASCII VTK File saved to disk:
>
> vtk output
> ASCII
> DATASET POLYDATA
> POINTS 4 float
> 1.37916 0.965356 0.21928
> 1.37129 0.964077 0.218481
> 1.37613 0.958331 0.219823
> 1.36947 0.958944 0.21948
> POLYGONS 5 20
> 3 0 1 2
> 3 2 1 3
> 3 0 1 2
> 3 2 1 3
> 3 2 1 3
>
> Is there any filter in ParaView capable of fixing this? Or does it have
> to be an arduously slow Python script to run in a Programmable Filter?
>
> --
> Randall Hand
> http://www.vizworld.com
>
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