- struct Map map;
- struct MapObjDef * map_obj_defs; /* Map object definitions. */
- struct MapObjAct * map_obj_acts; /* Map object action definitions. */
- struct MapObj * map_objs; /* Map objects. */
+ FILE * file_in; /* Input stream on file at .path_in. */
+ FILE * file_out; /* Output stream on file at .path_out. */
+ struct Map map; /* Game map. */
+ struct ThingType * thing_types; /* Thing type definitions. */
+ struct ThingAction * thing_actions; /* Thing action definitions. */
+ struct Thing * things; /* All physical things of the game world. */