move_result = mv_yx_in_dir_legal(chr(dir), t["T_POSY"], t["T_POSX"])
if 1 == move_result[0]:
pos = (move_result[1] * world_db["MAP_LENGTH"]) + move_result[2]
+ if ord("~") == world_db["MAP"][pos]:
+ log("You can't SWIM.")
+ return
if chr(world_db["MAP"][pos]) in symbols_passable:
world_db["Things"][0]["T_ARGUMENT"] = dir
set_command("move")