extern double vertex_areas[N], vertex_mean_edge_lengths[N], edge_lengths[N][V6];
+extern const double edge_angle_cost_circcircrat;
+
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 rim_proximity_cost(const Vertices vertices, int section);
+double edge_angle_cost(const Vertices vertices, int section);
+double small_triangles_cost(const Vertices vertices, int section);
extern const char *input_file, *best_file;
extern char *best_file_tmp;