[vtkusers] Find surface polydata of an unstructured grid

[madz]

In case my question wasn't clear enough,

<http://vtk.1045678.n5.nabble.com/file/n5725179/write_file.png> 

As the above image shows, There are two outer faces in the grid - face A and
B, I need to get the polydata of each face separately. Is there a way to
achieve this in VTK? 



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