[vtkusers] Converting Unstructured Grid to Polydata

[Jihang Wang]

Hi guys,

I am trying to convert the output of delaunay3D which belong to Unstructured
Grid to Polydata. Someone said we can use vtkGeometryFilter to do it. When I
try it, I get an error below.

cannot convert parameter 1 from 'vtkUnstructuredGrid *' to 'vtkDataObject *'

My coding is:
vtkGeometryFilter *extract = vtkGeometryFilter::New();
extract->SetInput(delaunay3D->GetOutput());

Thanks,

Jihang
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