[vtkusers] vtkPointPicker

[alletto at dei.unipd.it]

Hi again,
I've got some problems with vtkPointPicker. I don't know how to go to the 
procedure for using PickEvent.
I've tried by defining a class vtkmyCallback...iren->AddObserver (vtkCommand: 
PickEvent,callback) but nothing happens.
Do you know how to use EndPickMethod ()?
Thanks a lot!!

Michele Alletto
Padua University
Italy

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