[vtkusers] Is there a relationship between polygon faces and cells?

[Louis le Grange]

Dear Users

By using vtkGeometryFilter one can extract polygon faces from an
unstructured grid.

Is there a way that one can find the cell id on which a particular polygon
face lies?

Ultimately one would like to pick a cell face (polygon face) and then be
able to get the cell id on which the face lies.

Thanks in advance, Louis