[vtkusers] How to get normals??

[renlishen]

Thank you, Bill~

After I use 
vtkPolyDataNormals *normals = vtkPolyDataNormals::New() ;
normals->SetInput( MyPolyData->GetOutput() ) ;
normals->ComputePointNormalsOn() ;
normals->Updata() ;
and how can I get the points' normal?
I always get the only one normal...

Does anyone help me to solve this question?
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