[vtk-developers] How to get "raw" data from vtkPolyData ?

[houssen]

How to get "raw" data from vtkPolyData ?

My understanding is that vtkPolyData stands for "pure visualization" 
data (triangulation). For instance, if my raw data is a hexahedron 
(vtkUnstructuredGrid), then the associated vtkPolyData will "only" be a 
set of 8 points and 6 faces which are mandatory to render the 
hexahedron.

 From the vtkPolyData, how to get the hexahedron (as a 
vtkUnstrucutredGrid) ?

Franck