[Paraview] slicing a large VTK_POLYHEDRON

Tue Jan 3 10:46:29 EST 2017

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

> 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 <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 <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 <mailto: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 <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 
> 
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