#define GFX_CRUMBLED(e) HAS_PROPERTY(GFX_ELEMENT(e), EP_GFX_CRUMBLED)
// macros for pre-defined properties
-#define ELEM_IS_PLAYER(e) HAS_PROPERTY(e, EP_PLAYER)
+#define IS_PLAYER_ELEMENT(e) HAS_PROPERTY(e, EP_PLAYER)
#define CAN_PASS_MAGIC_WALL(e) HAS_PROPERTY(e, EP_CAN_PASS_MAGIC_WALL)
#define CAN_PASS_DC_MAGIC_WALL(e) HAS_PROPERTY(e, EP_CAN_PASS_DC_MAGIC_WALL)
#define IS_SWITCHABLE(e) HAS_PROPERTY(e, EP_SWITCHABLE)
(ge == EL_ANY_ELEMENT ? TRUE : \
IS_GROUP_ELEMENT(ge) ? IS_IN_GROUP(e, GROUP_NR(ge)) : (e) == (ge))
-#define IS_PLAYER(x, y) (ELEM_IS_PLAYER(StorePlayer[x][y]))
+#define IS_PLAYER(x, y) (IS_PLAYER_ELEMENT(StorePlayer[x][y]))
#define IS_FREE(x, y) (Tile[x][y] == EL_EMPTY && !IS_PLAYER(x, y))
#define IS_FREE_OR_PLAYER(x, y) (Tile[x][y] == EL_EMPTY)
// values for game_emulation
#define EMU_NONE 0
#define EMU_BOULDERDASH 1
-#define EMU_SOKOBAN 2
+#define EMU_UNUSED_2 2
#define EMU_SUPAPLEX 3
// values for level file type identifier