return Lookup::blank (Box (Interval (0, 0), Interval (0, 0)));
}
Interval x_extent = Interval (0, join_thickness);
Interval y_extent = (delta_pitch > 0)
return Lookup::blank (Box (Interval (0, 0), Interval (0, 0)));
}
Interval x_extent = Interval (0, join_thickness);
Interval y_extent = (delta_pitch > 0)