- Interval ext = robust_relative_extent (b, common, X_AXIS);
- span_points[d] = ext [broken[d] ? RIGHT : LEFT];
+ span_points[d]
+ = Axis_group_interface::generic_bound_extent (b, common, X_AXIS)[RIGHT];
+ }
+ else
+ span_points[d] = b->relative_coordinate (common, X_AXIS);