[vtkusers] Please help to solve the problem on Picking a point on surface

[yfl at doc.ic.ac.uk]

I try to pick a point on the surface. In vtk4.2, the action of picking is 
invoked by SetEndPickMethod() of vtkRenderWindowInteractor. But now I have 
upgraded to vtk4.4. Instead of using SetEndPickMethod(, what function I should 
call to invoke the picking?

vtkRenderWindow *renWin = vtkRenderWindow::New();
vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
vtkPointPicker *mouse_picker = vtkPointPicker::New();

mouse_picker->SetTolerance(0.01);
iren->SetPicker(mouse_picker);
renWin->Render();
iren->SetEndPickMethod(pickPoint,(void *)iren);
iren->Start();


Thanks a lot.
Krista