extern const double edge_angle_cost_circcircrat;
+double vertex_displacement_cost(const Vertices vertices, int section);
+double vertex_edgewise_displ_cost(const Vertices vertices, int section);
double line_bending_cost(const Vertices vertices, int section);
double noncircular_rim_cost(const Vertices vertices, int section);
double edge_length_variation_cost(const Vertices vertices, int section);
double prop_edge_length_variation_cost(const Vertices vertices, int section);
double rim_proximity_cost(const Vertices vertices, int section);
+double rim_twist_cost(const Vertices vertices, int section);
double edge_angle_cost(const Vertices vertices, int section);
double small_triangles_cost(const Vertices vertices, int section);
+double nonequilateral_triangles_cost(const Vertices vertices, int section);
extern const char *input_file, *best_file;
extern char *best_file_tmp;