[vtkusers] mousepicking

[verena kinder]

Hello!
I try to make my render window reacts on mouse picking! 
I thougt it would run that way, but it doesn't work:

class vtkPicking: public vtkCommand
{
public:
  static vtkPicking *New(){ return new vtkPicking; };
  virtual void Execute(vtkObject * caller, unsigned long, void*){
	//Just for testing
  	cout<<"You are Picking"<<endl;}
  };

int main (int argc, char **argv)
{
	vtkRenderer *aRenderer = vtkRenderer::New();
	vtkRenderWindow *renWin = vtkRenderWindow::New();
	vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();

	aRenderer->SetBackground(1.0,0.0,0.0);
	renWin->AddRenderer(aRenderer);
	iren->SetRenderWindow(renWin);

	renWin->Render();

	....

	vtkCellPicker *picker=vtkCellPicker:: New();
	vtkPicking *b=vtkPicking ::New();
	iren->SetPicker(picker);
	iren->AddObserver(vtkCommand::EndPickEvent,b);
	iren->Initialize();
	iren->Start();
.............

}

Anbody an idea?

Thanks
verena

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