[Paraview] slicing a large VTK_POLYHEDRON

[Mathieu Westphal]

Hi

Indeed, incorrect copy paste. thanks for pointing it out.

Mathieu Westphal

On Tue, Jan 3, 2017 at 4:46 PM, T.J. Corona <tj.corona at kitware.com> wrote:

> Hi Mathieu and Pierre,
>
> Perhaps you meant to point to this “work in progress” branch?
>
> https://gitlab.kitware.com/vtk/vtk/merge_requests/2088
>
> Sincerely,
> T.J.
>
> Thomas J. Corona, Ph.D.
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4443 <(518)%20881-4443>
>
> On Jan 3, 2017, at 10:18 AM, Mathieu Westphal <
> mathieu.westphal at kitware.com> wrote:
>
> Hello
>
> for your information there is a bug in the slicing of vtkPolyHedron that
> can cause a segfault.
> It looks very much like your error. It has yet to be corrected.
> https://gitlab.kitware.com/vtk/vtk/issues/16877
>
> You can already test this "work in progress" branch to see if this fixes
> your issue  :
> https://gitlab.kitware.com/vtk/vtk/merge_requests/2304
>
> You could of course modify your data to tetrahedron with tetrahedralize
> filter.
>
> Regards,
>
> Mathieu Westphal
>
> On Tue, Jan 3, 2017 at 4:10 PM, Pierre Van Hauwaert <
> pierre at rtech-engineering.nl> wrote:
>
>> Hi,
>>
>> I am using paraview to visualise my data. I generate my data using a
>> combination of the 2 following types (
>> <http://www.vtk.org/doc/nightly/html/vtkCellType_8h_source.html>
>> http://www.vtk.org/doc/nightly/html/vtkCellType_8h_source.html)
>> VTK_VOXEL
>> <http://www.vtk.org/doc/nightly/html/vtkCellType_8h.html#ab1d6fd1f3177b8a2a32bb018807151f8a06a70888292dc4309e42404af594fbb4>
>> = 11
>> VTK_POLYHEDRON = 42 I can visualize that data with parview without a
>> problem. But, because I ended up having a segfault without any error
>> message when slicing (Z=0) the data. I decomposed my data in separate files
>> for each VTK_POLYHEDRON in order to investigate the problem.
>>
>> I found out that only the polyhedrons with the largest size were having
>> the problem. The limit is somewhere between the 2 files:
>> - poly-F1000-2395.vtu : working: 466 points, 928 faces
>> - poly-F1000-2987.vtu : segfault when slicing: 546 points, 1088 faces
>>
>> So my guess is that there is a limit for the number of points or the
>> number of faces that can have the polyhedron (1024 ?) if I want to be able
>> to use the slice function.
>>
>> My questions are :
>> 1) Is there actually a limitation in Paraview (VTK?) regarding the number
>> of faces or the number of the point that the slice function can handle for
>> a polyhedron ?
>> 2) If there is this limitation, is there an option to remove it in
>> Paraview ? (specific version, compilation option, etc)
>> 3) If there is this limitation, is there any work around that exist so I
>> am able to slice my data ? For example a different format ?
>>
>>
>> I attached the data to be able to back up my statement:
>>
>> poly-F1000-*.vtu : files describing a polyhedron each:
>> poly-F1000.pvd : load all those files
>>
>> Biggest file for which the slicing works (size, name):
>> 34K poly-F1000-2395.vtu
>>
>> The 8 biggest files triggering the crash when doing a slice: (size, name)
>> 38K poly-F1000-2987.vtu
>> 39K poly-F1000-2983.vtu
>> 39K poly-F1000-2935.vtu
>> 39K poly-F1000-2988.vtu
>> 39K poly-F1000-2931.vtu
>> 40K poly-F1000-2937.vtu
>> 40K poly-F1000-2981.vtu
>> 40K poly-F1000-2930.vtu
>> fail.pvd: load those 8 files
>>
>> the other files can be sliced without any issues
>>
>>
>> Thanks,
>>
>> Pierre
>>
>> --
>> R.Tech Engineering B.V.
>> Eekholt 42 - 1112 XH Diemen - the Netherlands
>> Tel: +31 (0) 2 04 95 02 22
>>
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