[vtkusers] How to smooth a vtkPolyData Object?

[Ming Chao]

Hi,

I am kinda new to VTK. Could anybody give me a hint how to smooth a
vtkPolyData object (3D). I searched around and found that
vtkSmoothPolyDataFilter might be able to do the trick. But I am not sure how
to use it. What I am having is a vtkPolyData object which is too spiky and I
want to smooth it. It could be very simple to do it but I do need help.  I
have the following code:

 vtkSmoothPolyDataFilter* smooth = vtkSmoothPolyDataFilter::New();
 smooth->SetInput(  ?????  ->GetOutput());  // what to replace with ?????
is it my vtkPolyData object?
 smooth->SetNumberOfIterations(10);
 smooth->SetRelaxationFactor(0.5);
 smooth->Update();

 vtkPolyData* smoothedPoly = smooth->GetOutput();
 ......

TIA,
Ming
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