[vtkusers] boundary points

[Tasnim]

Hi all,
I'm trying to find the Mesh's boundary points. I tried with the
BoundaryEdges example :
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/BoundaryEdges
<http://www.vtk.org/Wiki/VTK/Examples/Cxx/Meshes/BoundaryEdges>  . But this
example gives me the boundaryCells, so i got points which are on ne boundary
and other points which aren't in the mesh's boundary. Is there any
suggestion about how to retrieve just points that are in the boundary, and
not cells!!!
thanks



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