>>>>> "VN" == Vidhya Narayanan <gtg066j at mail.gatech.edu> writes:
    VN>     I want to select a point on an iso surface generated by
    VN> the MC algorithm and dispay the normal of that point.Can
    VN> anyone suggest a simple way to do this.
Use one of vtkPicker's subclasses (vtkPointPicker, vtkCellPicker
etc.).
cheers,
prabhu