void HL_astar_free(struct HL_astar *s);
struct HL_astar *HL_astar_clear(struct HL_astar *s);
struct HL_astar *HL_astar_init(struct HL_astar *s);
+void HL_vertices(int cantor, double *vc);
+
+extern double HL_fand[16];
+extern float HL_fanf[16];
+extern double HL_hfand[16]; /* horizontal grids */
+extern float HL_hfanf[16]; /* horizontal grids */
+extern double HL_square;
#endif