[vtkusers] Problem with AddObserver

[soheilghafurian]

Hi

I'm new to vtk and I have this problem: I want to use vtkCellPicker and I
define it and add a callback to it so:

Picker = vtkCellPicker::New();
  Picker->AddObserver(vtkCommand::EndPickEvent,PickCom);


On the other hand, PickCom is an object of a class I have derived from
vtkCommand like this:

class CScapula::CPCom: public vtkCommand
{
	void Execute (vtkObject *caller, unsigned long, void*)
	{
	};
};

what happens is my code is build with no errors, but when I run it, the
program closes. Could anyone help me with this problem? I checked some
examples, and I didn't understand what whas wrong.

Thanks

Soheil

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