[vtkusers] Find closest point

[nuno.jf]

Well, this is strange, my application crashes each time I run it since I
applied vtkWindowedSincPolyDataFilter.
I read my point cloud (vtkpolydata) and then I apply the filter to it. What
could be wrong?

vtkPolyDataReader * imp = vtkPolyDataReader::New();
imp -> SetFileName (argv[1]);
imp -> Update();

vtkWindowedSincPolyDataFilter *smoother = 
vtkWindowedSincPolyDataFilter::New();
  smoother->SetInput(imp -> GetOutput());
  smoother->SetNumberOfIterations(15);
  smoother->SetPassBand(.001);
  smoother->Update();

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