right_point = max (right_point, heads.back ()->extent (common, X_AXIS)[RIGHT]);
Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
right_point = max (right_point, heads.back ()->extent (common, X_AXIS)[RIGHT]);
Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);