#define CP_HALF_DESTRUCTIVE 1
#define CP_FULL_DESTRUCTIVE 2
-/* values for special move patterns (bits 0-3: basic move directions) */
+/* values for custom move patterns (bits 0 - 3: basic move directions) */
#define MV_BIT_TOWARDS_PLAYER 4
#define MV_BIT_AWAY_FROM_PLAYER 5
#define MV_BIT_ALONG_LEFT_SIDE 6
#define MV_BIT_TURNING_LEFT_RIGHT 14
#define MV_BIT_TURNING_RIGHT_LEFT 15
#define MV_BIT_TURNING_RANDOM 16
-#define MV_BIT_PREVIOUS 17
-/* values for special move patterns for custom elements */
+/* values for custom move patterns */
#define MV_HORIZONTAL (MV_LEFT | MV_RIGHT)
#define MV_VERTICAL (MV_UP | MV_DOWN)
#define MV_ALL_DIRECTIONS (MV_HORIZONTAL | MV_VERTICAL)
#define MV_ANY_DIRECTION (MV_ALL_DIRECTIONS)
-#define MV_RANDOM (MV_ALL_DIRECTIONS)
-#define MV_AUTOMATIC (MV_NO_MOVING)
#define MV_TOWARDS_PLAYER (1 << MV_BIT_TOWARDS_PLAYER)
#define MV_AWAY_FROM_PLAYER (1 << MV_BIT_AWAY_FROM_PLAYER)
#define MV_ALONG_LEFT_SIDE (1 << MV_BIT_ALONG_LEFT_SIDE)
#define MV_TURNING_LEFT_RIGHT (1 << MV_BIT_TURNING_LEFT_RIGHT)
#define MV_TURNING_RIGHT_LEFT (1 << MV_BIT_TURNING_RIGHT_LEFT)
#define MV_TURNING_RANDOM (1 << MV_BIT_TURNING_RANDOM)
-#define MV_PREVIOUS (1 << MV_BIT_PREVIOUS)
+
+/* values for initial move direction (bits 0 - 3: basic move directions) */
+#define MV_START_BIT_PREVIOUS 4
+
+/* values for initial move direction */
+#define MV_START_AUTOMATIC (MV_NO_MOVING)
+#define MV_START_LEFT (MV_LEFT)
+#define MV_START_RIGHT (MV_RIGHT)
+#define MV_START_UP (MV_UP)
+#define MV_START_DOWN (MV_DOWN)
+#define MV_START_RANDOM (MV_ALL_DIRECTIONS)
+#define MV_START_PREVIOUS (1 << MV_START_BIT_PREVIOUS)
/* values for elements left behind by custom elements */
#define LEAVE_TYPE_UNLIMITED 0