[vtkusers] Retrieving vertex/normals from vtkPolyData

[Bernard LERAT]

Hi all,

I want to use VTK exclusively for computations because I have my own 
renderer.

Can you help me to retrieve vertex and normal informations from vtkPolyData 
? I could not find clear explanations in the mailing list archives ( 
GetPointData(), GetNumberOfPoints() ... stay obscur to me ).

Best regards,
Bernard.