[Paraview] Possible to view ExodusII HEX9 data?

[Weston Ortiz]

> Have you built ParaView yourself or do you install it from packages.

Usually just from the paraview tarballs, i can try adding the new change
code next week though.

> It would help to have a small example file for us to test against.

Attached is a small example file (lid driven cavity, ldc.exoII) and an
example output image of a slice with velocity vectors in ensight

Thanks,

Weston

On Fri, Feb 9, 2018 at 3:17 PM, David Thompson <david.thompson at kitware.com>
wrote:

> Hi Weston,
>
> > Is there any way I could render HEX9 exodusii data as as HEX8 data in
> paraview,  (ignoring the 9th node) or work with it directly?
>
> Not without modifying the source. Have you built ParaView yourself or do
> you install it from packages.
>
> >
> > HEX9 numbering: https://github.com/gsjaardema/seacas/blob/master/docs/
> topology/hex09.png
> >
> > It appears that Paraview reads the file as HEX8 but is reading the
> center node as part of one of the hexahedron's edges (see attached image)
>
> It would help to have a small example file for us to test against. If you
> want to experiment, you can edit VTK/IO/Exodus/vtkExodusIIReader.cxx
> around line 3237 (inside vtkExodusIIReaderPrivate::DetermineVtkCellType)
> and add
>
>   else if ((elemType.substr(0,3) == "HEX") &&      (binfo.BdsPerEntry[0]
> == 9))
>     { binfo.CellType=VTK_HEXAHEDRON;               binfo.PointsPerCell =
> 8; }
>
> You can see that is what we do for 21-node hexes currently.
>
>         David
>
>
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