[Paraview] Integrate Variables filter generates negative volume for UnstructuredGrid

[Andy Bauer]

Hi Mark,

It looks like some of your cells are inverted in their canonical ordering.
You can use the Mesh Quality filter to see the tets that have negative
volumes.

Probably the easiest way to fix the cells canonical ordering would be using
Programmable Filter.

Regards,
Andy

On Thu, May 14, 2015 at 5:30 PM, Mark Cartwright <
mcartwright at microseismic.com> wrote:

>  Hello,
>
>
>
>   I have an unstructured grid that oddly produces a negative volume – I’ve
> looked for degenerate cells, etc.  But cannot find anything obvious.
>
>
>
>   The file is attached, it’s a very small grid of approx.. 1500 cells,
> I’ve removed the data arrays – they integrated negative too – but this did
> not resolve the issue with the volume being < 0.
>
>
>
>    I am look at vtkIntegrateAttributes now and will post if I find
> anything.
>
>
>
>   Happy bug hunting,
>
>
>
> Mark
>
>
>
>
>
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