[vtkusers] Get Triangle Info from Delaunay3D

[Rainer Grimmer]

Hi All
 
I have a problem using Delaunay3D.
I have a coupe of datasets of point clouds which each give non convex polygons.
The directly usage of Delaunay3D is not possible since only convex polygons are triangulated correctly.
Yet I know how to separate the point cloud in groups which give convex polygons.
Taking one of these groups Delaunay3D works good and I can visualise it.
 
But for joining the part polygons to the whole polygon I would need access to the triangle information given by the Delaunay3D.
Yet Delaunay3D only gives as result a vtkDataSet and I would need a vtkPolyData (like the 2D version of the Delaunay triangulation gives).
 
Does anyboldy know how to convert a vtkDataSet to a vtkPolyData or how to get the triangle information out of a vtkDataSet?
 
Thanks for every hint or advice,
Rainer
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