[vtkusers] Polyhedron to regular cell type

[Armin Wehrfritz]

Hi Felipe,

I don't think there is an "easy way" in the sense of a ready made
implementation in a basic VTK class (though I think that would be a very
nice feature to have).

However, the OpenFOAM reader in VTK has an option to decompose
polyhedral cells into VTK_TETRA or VTK_PYRAMID. Maybe you have a look at
the implementation there:
https://gitlab.kitware.com/vtk/vtk/blob/master/IO/Geometry/vtkOpenFOAMReader.cxx#L6470
https://gitlab.kitware.com/vtk/vtk/blob/master/IO/Geometry/vtkOpenFOAMReader.cxx#L6184

Hope this helps!

Cheers,
Armin



On 11/30/2016 11:49 AM, Felipe Bordeu wrote:
> hi,
>  I'm working on a filter, and I use a Voronoi library (external) to
> generate polyhedron cells (VTK_POLYHEDRON). I will like to know if there
> is any easy way to identified and to convert some of my polyedron cells
> to a regular cells (hexaedron for example).  In most for my cases all
> the voronoi cells are "classic" cells ( tetras, hexas, wedge...).
>
> I dont care if the code is expensive, because I do it only in a limited
> number of elements (less than 50).
>
> Thanks
> Felipe
>
> using c++, (paraview 5.2)
>
>
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