[vtkusers] vtkPolyDataNormals- access normal

[kývýlcým helhel]

   Hey, 

Once i have this vtkPolyData structure and use the vtkPolyDataNormals  
filter to compute the normals as follow: 

    vtkPolyDataNormals *MeshNormals = vtkPolyDataNormals::New(); 
    MeshNormals->SetComputePointNormals(1); 
    MeshNormals->SetInput(vtkMesh); 
    vtkPolyData * vtkMeshNormals = MeshNormals->GetOutput(); 

I would like to know how to have acces to the normal vector values  
themselves (X,Y,Z) and the index? 
Thanks for you help. 
Kiv 
       
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