[vtkusers] Confused about the number of cells after vtkClipPolyData with implicit function

[David E DeMarle]

Sure sounds like a bug, can you file a bug report with the url to the
example that demonstrates?

thanks

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Thu, Jun 20, 2013 at 4:07 PM, David Doria <daviddoria at gmail.com> wrote:

> On Thu, Jun 20, 2013 at 3:44 PM, David E DeMarle
> <dave.demarle at kitware.com> wrote:
> > Not me, but if you make a vtkDataSetWriter and dump the output as text,
> you
> > can either look at the file and see what is unaccounted for, or open it
> up
> > in ParaView and use the spreadsheet view to see it more effectively.
>
> The cells seem to be well formed, but there are tons of NAN points
> that I guess the cells are referencing. At line 250ish in
> vtkClipPolyData.cxx:
>
>     // evaluate implicit cutting function
>     for ( i=0; i < numberOfPoints; i++ )
>       {
>       s = clipScalars->GetComponent(cellIds->GetId(i),0);
>       cellScalars->InsertTuple(i, &s);
>       }
>
> 's' is getting set to -inf for many of the cells, which is my best
> quick guess at what is causing the NANs. Kind of looks like a bug to
> me, unless I'm setting up something incorrectly in the example.
>
> David
>
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