I had a question about the nature of the underlying VTK data. In my work I am often visualizing particle data, which I currently have in XMDF files with Polyvertex topology. When I load the files into PV, the data ends up being represented by a vtkUnstructuredGrid. What is the difference between vtkUnstructuredGrid versus vtkPolyData? I know that both inherit from abstract vtkPointSet so they are generally fairly interchangeable as most filters appear to require only a vtkPointSet. Are there any filters that would take one but not the other?
Also: Some filters I am looking to use want a vtkPointSet input, but I have vtkImageData (via XMDF 3DCoRectMesh topology). What would be the best way to make the conversion in Paraview? Many thanks. Dan Lussier
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