Real absolute_closeness_measure_;
Real edge_slope_exponent_;
Real close_to_edge_length_;
Real head_slur_distance_max_ratio_;
Real head_slur_distance_factor_;
Real absolute_closeness_measure_;
Real edge_slope_exponent_;
Real close_to_edge_length_;
Real head_slur_distance_max_ratio_;
Real head_slur_distance_factor_;