+static uint8_t seeing_thing(struct Thing * t_eye, char filter);
+
+/* Return slot ID of strongest consumable in "t_owner"'s inventory, else -1. */
+static int16_t get_inventory_slot_to_consume(struct Thing * t_owner);
+
+/* Return 1 if "t_standing" is standing on a consumable, else 0. */
+static uint8_t standing_on_consumable(struct Thing * t_standing);
+
+
+
+static void get_neighbor_scores(uint16_t * score_map, uint16_t pos_i,
+ uint16_t max_score, uint16_t * neighbors)
+{
+ uint32_t map_size = world.map.length * world.map.length;
+ uint8_t i_dir;
+ for (i_dir = 0; i_dir < N_DIRS; neighbors[i_dir] = max_score, i_dir++);
+ uint8_t open_north = pos_i >= world.map.length;
+ uint8_t open_east = pos_i + 1 % world.map.length;
+ uint8_t open_south = pos_i + world.map.length < map_size;
+ uint8_t open_west = pos_i % world.map.length;
+ uint8_t is_indented = (pos_i / world.map.length) % 2;
+ uint8_t open_diag_west = is_indented || open_west;
+ uint8_t open_diag_east = !is_indented || open_east;
+ if (open_north && open_diag_east)
+ {
+ neighbors[0] = score_map[pos_i - world.map.length + is_indented];
+ }
+ if (open_east)
+ {
+ neighbors[1] = score_map[pos_i + 1];
+ }
+ if (open_south && open_diag_east)
+ {
+ neighbors[2] = score_map[pos_i + world.map.length + is_indented];
+ }
+ if (open_south && open_diag_west)
+ {
+ neighbors[3] = score_map[pos_i + world.map.length - !is_indented];
+ }
+ if (open_west)
+ {
+ neighbors[4] = score_map[pos_i - 1];
+ }
+ if (open_north && open_diag_west)
+ {
+ neighbors[5] = score_map[pos_i - world.map.length - !is_indented];
+ }
+}