(x) == MV_RIGHT ? MV_BIT_RIGHT : \
(x) == MV_UP ? MV_BIT_UP : MV_BIT_DOWN)
+#define MV_DIR_OPPOSITE(x) ((x) == MV_LEFT ? MV_RIGHT : \
+ (x) == MV_RIGHT ? MV_LEFT : \
+ (x) == MV_UP ? MV_DOWN : \
+ (x) == MV_DOWN ? MV_UP : MV_NO_MOVING)
+
/* values for animation mode (frame order and direction) */
#define ANIM_NONE 0