[vtk-developers] VTK 7.0 segfault in vtkContourFilter with UseScalarTree

[Will Schroeder]

Thanks Leif, I suspect that I am the culprit. I'm traveling on and off but
I'll make a fix as soon as I can.
Best,
W

On Sat, Feb 6, 2016 at 2:14 PM, Leif Delgass <ldelgass at gmail.com> wrote:

> In VTK 7.0, I am getting a segfault in vtkContourFilter when setting
> UseScalarTreeOn(), but not supplying a ScalarTree pointer.  This worked in
> VTK 6.3, since the filter would create a default vtkSimpleScalarTree if a
> ScalarTree wasn't supplied.  However, it seems that in the following
> commit, the code was changed so that now a default ScalarTree (a
> vtkSpanSpace) is only supplied if the input is an unstructured grid.
>
>
> https://gitlab.kitware.com/vtk/vtk/commit/8ae05d907d5b047be79574cf8cc0c3c9a816e51c#4ec6be05bae9bbde34d3583e844cc26dfc4e91ea_574_589
>
> Restoring the deleted block from vtkContourFilter.cxx:574:589 in the above
> commit fixes the problem for me.
>
> I haven't made a test/repro case, but this should be fairly simple to
> reproduce, just:
>
> 1. Attach a data set that isn't an unstructured grid (e.g. a
> vtkStructuredGrid), to a vtkContourFilter.
> 2. Generate a couple of isovalues in the filter.
> 3. Set UseScalarTreeOn() in the filter and update/run the filter.
>
> -Leif
>
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-- 
William J. Schroeder, PhD
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