[vtkusers] How to Recover vtkPolyData from vtkThreshold

[John Platt]

Hi Users,

 

I would like to render selective cells from vtkPolyData. I tried

 

            vtkPolyData > vtkThreshold > vtkPolyDataMapper

 

but this does not compile because the output of vtkThreshold is of type
vtkUnstructuredGrid. 

 

Is there anyway of recovering the output of vtkThreshold as vtkPolyData
or an alternative filter?

 

Thanks for your help.

 

John. 

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