Real position = 2 * (my_off + o - staff_off) / ss;
Real rounded = directed_round (position, dir);
Grob *head = me->get_parent (X_AXIS);
Real position = 2 * (my_off + o - staff_off) / ss;
Real rounded = directed_round (position, dir);
Grob *head = me->get_parent (X_AXIS);