[vtkusers] vtkCompositeDataGeometryFilter and vtkPolyhedron

[Gerrick Bivins]

Update here.
After some trial and error I was able to use vtkDataSetSurfaceFilter to render the data correctly.
I was unable to get vtkGeometryFilter to work for unstructured grids with vtkPolyhedron cells.
(Is this a bug?)
>From the docs, it's not clear what the difference is other than "faster" and it doesn't appear to
be a direct replacement. Also, I'm not sure I can use it on composite data.
Can someone explain the difference? Will the vtkDataSetSurfaceFilter pass through the 0d,1d,2d cells as well?

Gerrick



From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf Of Gerrick Bivins
Sent: Wednesday, April 03, 2013 4:47 PM
To: 'vtkusers at vtk.org'
Subject: [vtkusers] vtkCompositeDataGeometryFilter and vtkPolyhedron

Hello,
I have a strange issue and I'm not sure if it is my data or a limitation I wasn't aware of.
I have an application that worked previously with composite data, specifically multiblocks of unstructured grids.
I've been attempting to use an unstructured grid in my composite data source and it is read in correctly but
as soon as I pass it to a vtkCompositeDataGeometryFilter, the output doesn't contain any cells, as if the filter doesn' t recognize
polyhedron cells. The strange thing is, the file reads in as expected in paraview....
Is there some limitation where vtkCompositeDataGeometryFilter (ie vtkGeometryFilter) doesn't work with polyhedron cells?
Gerrick
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