[vtkusers] GetCellNeighbors in for loop

[pjozog]

Ah I get it now.  GetCellNeighbors () alters the interal traversal location
of the vtkCellArray of polys.

You have to store the current traversal location before calling
GetCellNeighbors, then set it back once it returns.

That being said, if someone knows a vtk routine that gets all polygons in a
vtkPolyData object that don't have a neighbor on at least one of their
edges, please let me know.



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