[vtkusers] unstructuredgrid to polydata?

[david michell]

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Hi Everyone,
I have got this problem.

vtkDelaunay3D *del=vtkDelaunay3D::New();
del->SetInput(ptrUnstGrid);

vtkButterflySubdivisionFilter *butr=vtkButterflySubdivisionFilter::New();
/***************** Doesnt accept UG
butr->SetInput(del->GetOutput()) ;
******************/


Iam trying to add more triangles to the output of the Delaunay3D.
Delaunay3D gives UnstruturedGrid as output but ButterflySubdivisionFilter takes PolyData as input.

How to convert from UnstruturedGrid to PolyData?

Thanks for the help.
David Michell