[vtkusers] Picking

[dolivier at unina.it]

Hi VTK users,
I'm creating an application with vtk and fltk. I have an actor and I nedd to 
know the distance between 2 points.
Could somebody help me and send me an example how can I do it?
I can use the picker that is ocntainde in vtkWindowRenderInteractor, or I have 
to use vtkWorldPicker?
Thanks to all of you
Dario

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