+static struct GamePanelControlInfo game_panel_controls[] =
+{
+ {
+ GAME_PANEL_LEVEL_NUMBER,
+ &game.panel.level_number,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_GEMS,
+ &game.panel.gems,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_INVENTORY_COUNT,
+ &game.panel.inventory_count,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_1,
+ &game.panel.inventory_first[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_2,
+ &game.panel.inventory_first[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_3,
+ &game.panel.inventory_first[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_4,
+ &game.panel.inventory_first[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_5,
+ &game.panel.inventory_first[4],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_6,
+ &game.panel.inventory_first[5],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_7,
+ &game.panel.inventory_first[6],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_FIRST_8,
+ &game.panel.inventory_first[7],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_1,
+ &game.panel.inventory_last[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_2,
+ &game.panel.inventory_last[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_3,
+ &game.panel.inventory_last[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_4,
+ &game.panel.inventory_last[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_5,
+ &game.panel.inventory_last[4],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_6,
+ &game.panel.inventory_last[5],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_7,
+ &game.panel.inventory_last[6],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_INVENTORY_LAST_8,
+ &game.panel.inventory_last[7],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_1,
+ &game.panel.key[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_2,
+ &game.panel.key[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_3,
+ &game.panel.key[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_4,
+ &game.panel.key[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_5,
+ &game.panel.key[4],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_6,
+ &game.panel.key[5],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_7,
+ &game.panel.key[6],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_8,
+ &game.panel.key[7],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_WHITE,
+ &game.panel.key_white,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_KEY_WHITE_COUNT,
+ &game.panel.key_white_count,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_SCORE,
+ &game.panel.score,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_HIGHSCORE,
+ &game.panel.highscore,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_TIME,
+ &game.panel.time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_TIME_HH,
+ &game.panel.time_hh,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_TIME_MM,
+ &game.panel.time_mm,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_TIME_SS,
+ &game.panel.time_ss,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_FRAME,
+ &game.panel.frame,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_SHIELD_NORMAL,
+ &game.panel.shield_normal,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_SHIELD_NORMAL_TIME,
+ &game.panel.shield_normal_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_SHIELD_DEADLY,
+ &game.panel.shield_deadly,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_SHIELD_DEADLY_TIME,
+ &game.panel.shield_deadly_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_EXIT,
+ &game.panel.exit,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_EMC_MAGIC_BALL,
+ &game.panel.emc_magic_ball,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_EMC_MAGIC_BALL_SWITCH,
+ &game.panel.emc_magic_ball_switch,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_LIGHT_SWITCH,
+ &game.panel.light_switch,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_LIGHT_SWITCH_TIME,
+ &game.panel.light_switch_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_TIMEGATE_SWITCH,
+ &game.panel.timegate_switch,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_TIMEGATE_SWITCH_TIME,
+ &game.panel.timegate_switch_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_SWITCHGATE_SWITCH,
+ &game.panel.switchgate_switch,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_EMC_LENSES,
+ &game.panel.emc_lenses,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_EMC_LENSES_TIME,
+ &game.panel.emc_lenses_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_EMC_MAGNIFIER,
+ &game.panel.emc_magnifier,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_EMC_MAGNIFIER_TIME,
+ &game.panel.emc_magnifier_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_BALLOON_SWITCH,
+ &game.panel.balloon_switch,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_DYNABOMB_NUMBER,
+ &game.panel.dynabomb_number,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_DYNABOMB_SIZE,
+ &game.panel.dynabomb_size,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_DYNABOMB_POWER,
+ &game.panel.dynabomb_power,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_PENGUINS,
+ &game.panel.penguins,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_SOKOBAN_OBJECTS,
+ &game.panel.sokoban_objects,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_SOKOBAN_FIELDS,
+ &game.panel.sokoban_fields,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ROBOT_WHEEL,
+ &game.panel.robot_wheel,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_1,
+ &game.panel.conveyor_belt[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_2,
+ &game.panel.conveyor_belt[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_3,
+ &game.panel.conveyor_belt[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_4,
+ &game.panel.conveyor_belt[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_1_SWITCH,
+ &game.panel.conveyor_belt_switch[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_2_SWITCH,
+ &game.panel.conveyor_belt_switch[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_3_SWITCH,
+ &game.panel.conveyor_belt_switch[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CONVEYOR_BELT_4_SWITCH,
+ &game.panel.conveyor_belt_switch[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_MAGIC_WALL,
+ &game.panel.magic_wall,
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_MAGIC_WALL_TIME,
+ &game.panel.magic_wall_time,
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_GRAVITY_STATE,
+ &game.panel.gravity_state,
+ TYPE_STRING,
+ },
+ {
+ GAME_PANEL_GRAPHIC_1,
+ &game.panel.graphic[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_2,
+ &game.panel.graphic[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_3,
+ &game.panel.graphic[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_4,
+ &game.panel.graphic[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_5,
+ &game.panel.graphic[4],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_6,
+ &game.panel.graphic[5],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_7,
+ &game.panel.graphic[6],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_GRAPHIC_8,
+ &game.panel.graphic[7],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_1,
+ &game.panel.element[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_2,
+ &game.panel.element[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_3,
+ &game.panel.element[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_4,
+ &game.panel.element[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_5,
+ &game.panel.element[4],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_6,
+ &game.panel.element[5],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_7,
+ &game.panel.element[6],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_8,
+ &game.panel.element[7],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_1,
+ &game.panel.element_count[0],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_2,
+ &game.panel.element_count[1],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_3,
+ &game.panel.element_count[2],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_4,
+ &game.panel.element_count[3],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_5,
+ &game.panel.element_count[4],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_6,
+ &game.panel.element_count[5],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_7,
+ &game.panel.element_count[6],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_ELEMENT_COUNT_8,
+ &game.panel.element_count[7],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_1,
+ &game.panel.ce_score[0],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_2,
+ &game.panel.ce_score[1],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_3,
+ &game.panel.ce_score[2],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_4,
+ &game.panel.ce_score[3],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_5,
+ &game.panel.ce_score[4],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_6,
+ &game.panel.ce_score[5],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_7,
+ &game.panel.ce_score[6],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_8,
+ &game.panel.ce_score[7],
+ TYPE_INTEGER,
+ },
+ {
+ GAME_PANEL_CE_SCORE_1_ELEMENT,
+ &game.panel.ce_score_element[0],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_2_ELEMENT,
+ &game.panel.ce_score_element[1],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_3_ELEMENT,
+ &game.panel.ce_score_element[2],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_4_ELEMENT,
+ &game.panel.ce_score_element[3],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_5_ELEMENT,
+ &game.panel.ce_score_element[4],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_6_ELEMENT,
+ &game.panel.ce_score_element[5],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_7_ELEMENT,
+ &game.panel.ce_score_element[6],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_CE_SCORE_8_ELEMENT,
+ &game.panel.ce_score_element[7],
+ TYPE_ELEMENT,
+ },
+ {
+ GAME_PANEL_PLAYER_NAME,
+ &game.panel.player_name,
+ TYPE_STRING,
+ },
+ {
+ GAME_PANEL_LEVEL_NAME,
+ &game.panel.level_name,
+ TYPE_STRING,
+ },
+ {
+ GAME_PANEL_LEVEL_AUTHOR,
+ &game.panel.level_author,
+ TYPE_STRING,
+ },
+
+ {
+ -1,
+ NULL,
+ -1,
+ }
+};
+
+/* values for delayed check of falling and moving elements and for collision */
+#define CHECK_DELAY_MOVING 3
+#define CHECK_DELAY_FALLING CHECK_DELAY_MOVING
+#define CHECK_DELAY_COLLISION 2
+#define CHECK_DELAY_IMPACT CHECK_DELAY_COLLISION
+
+/* values for initial player move delay (initial delay counter value) */
+#define INITIAL_MOVE_DELAY_OFF -1
+#define INITIAL_MOVE_DELAY_ON 0
+
+/* values for player movement speed (which is in fact a delay value) */
+#define MOVE_DELAY_MIN_SPEED 32
+#define MOVE_DELAY_NORMAL_SPEED 8
+#define MOVE_DELAY_HIGH_SPEED 4
+#define MOVE_DELAY_MAX_SPEED 1
+
+#define DOUBLE_MOVE_DELAY(x) (x = (x < MOVE_DELAY_MIN_SPEED ? x * 2 : x))
+#define HALVE_MOVE_DELAY(x) (x = (x > MOVE_DELAY_MAX_SPEED ? x / 2 : x))
+
+#define DOUBLE_PLAYER_SPEED(p) (HALVE_MOVE_DELAY( (p)->move_delay_value))
+#define HALVE_PLAYER_SPEED(p) (DOUBLE_MOVE_DELAY((p)->move_delay_value))
+
+/* values for other actions */
+#define MOVE_STEPSIZE_NORMAL (TILEX / MOVE_DELAY_NORMAL_SPEED)
+#define MOVE_STEPSIZE_MIN (1)
+#define MOVE_STEPSIZE_MAX (TILEX)
+
+#define GET_DX_FROM_DIR(d) ((d) == MV_LEFT ? -1 : (d) == MV_RIGHT ? 1 : 0)
+#define GET_DY_FROM_DIR(d) ((d) == MV_UP ? -1 : (d) == MV_DOWN ? 1 : 0)
+
+#define INIT_GFX_RANDOM() (GetSimpleRandom(1000000))
+
+#define GET_NEW_PUSH_DELAY(e) ( (element_info[e].push_delay_fixed) + \
+ RND(element_info[e].push_delay_random))
+#define GET_NEW_DROP_DELAY(e) ( (element_info[e].drop_delay_fixed) + \
+ RND(element_info[e].drop_delay_random))
+#define GET_NEW_MOVE_DELAY(e) ( (element_info[e].move_delay_fixed) + \
+ RND(element_info[e].move_delay_random))
+#define GET_MAX_MOVE_DELAY(e) ( (element_info[e].move_delay_fixed) + \
+ (element_info[e].move_delay_random))
+#define GET_NEW_CE_VALUE(e) ( (element_info[e].ce_value_fixed_initial) +\
+ RND(element_info[e].ce_value_random_initial))
+#define GET_CE_SCORE(e) ( (element_info[e].collect_score))
+#define GET_CHANGE_DELAY(c) ( ((c)->delay_fixed * (c)->delay_frames) + \
+ RND((c)->delay_random * (c)->delay_frames))
+#define GET_CE_DELAY_VALUE(c) ( ((c)->delay_fixed) + \
+ RND((c)->delay_random))
+
+
+#define GET_VALID_RUNTIME_ELEMENT(e) \
+ ((e) >= NUM_RUNTIME_ELEMENTS ? EL_UNKNOWN : (e))
+
+#define RESOLVED_REFERENCE_ELEMENT(be, e) \
+ ((be) + (e) - EL_SELF < EL_CUSTOM_START ? EL_CUSTOM_START : \
+ (be) + (e) - EL_SELF > EL_CUSTOM_END ? EL_CUSTOM_END : \
+ (be) + (e) - EL_SELF)
+
+#define GET_PLAYER_FROM_BITS(p) \
+ (EL_PLAYER_1 + ((p) != PLAYER_BITS_ANY ? log_2(p) : 0))
+
+#define GET_TARGET_ELEMENT(be, e, ch, cv, cs) \
+ ((e) == EL_TRIGGER_PLAYER ? (ch)->actual_trigger_player : \
+ (e) == EL_TRIGGER_ELEMENT ? (ch)->actual_trigger_element : \
+ (e) == EL_TRIGGER_CE_VALUE ? (ch)->actual_trigger_ce_value : \
+ (e) == EL_TRIGGER_CE_SCORE ? (ch)->actual_trigger_ce_score : \
+ (e) == EL_CURRENT_CE_VALUE ? (cv) : \
+ (e) == EL_CURRENT_CE_SCORE ? (cs) : \
+ (e) >= EL_PREV_CE_8 && (e) <= EL_NEXT_CE_8 ? \
+ RESOLVED_REFERENCE_ELEMENT(be, e) : \
+ (e))
+
+#define CAN_GROW_INTO(e) \
+ ((e) == EL_SAND || (IS_DIGGABLE(e) && level.grow_into_diggable))
+
+#define ELEMENT_CAN_ENTER_FIELD_BASE_X(x, y, condition) \
+ (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) || \
+ (condition)))
+
+#define ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, condition) \
+ (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) || \
+ (CAN_MOVE_INTO_ACID(e) && \
+ Feld[x][y] == EL_ACID) || \
+ (condition)))
+
+#define ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x, y, condition) \
+ (IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) || \
+ (CAN_MOVE_INTO_ACID(e) && \
+ Feld[x][y] == EL_ACID) || \
+ (condition)))
+
+#define ELEMENT_CAN_ENTER_FIELD_BASE_4(e, x, y, condition) \
+ (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) || \
+ (condition) || \
+ (CAN_MOVE_INTO_ACID(e) && \
+ Feld[x][y] == EL_ACID) || \
+ (DONT_COLLIDE_WITH(e) && \
+ IS_PLAYER(x, y) && \
+ !PLAYER_ENEMY_PROTECTED(x, y))))
+
+#define ELEMENT_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_4(e, x, y, 0)
+
+#define SATELLITE_CAN_ENTER_FIELD(x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(EL_SATELLITE, x, y, 0)
+
+#define ANDROID_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, Feld[x][y] == EL_EMC_PLANT)
+
+#define ANDROID_CAN_CLONE_FIELD(x, y) \
+ (IN_LEV_FIELD(x, y) && (CAN_BE_CLONED_BY_ANDROID(Feld[x][y]) || \
+ CAN_BE_CLONED_BY_ANDROID(EL_TRIGGER_ELEMENT)))
+
+#define ENEMY_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, 0)
+
+#define YAMYAM_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x, y, Feld[x][y] == EL_DIAMOND)
+
+#define DARK_YAMYAM_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x,y, IS_FOOD_DARK_YAMYAM(Feld[x][y]))
+
+#define PACMAN_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x, y, IS_AMOEBOID(Feld[x][y]))
+
+#define PIG_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, IS_FOOD_PIG(Feld[x][y]))
+
+#define PENGUIN_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, (Feld[x][y] == EL_EXIT_OPEN || \
+ Feld[x][y] == EL_EM_EXIT_OPEN || \
+ Feld[x][y] == EL_STEEL_EXIT_OPEN || \
+ Feld[x][y] == EL_EM_STEEL_EXIT_OPEN || \
+ IS_FOOD_PENGUIN(Feld[x][y])))
+#define DRAGON_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, 0)
+
+#define MOLE_CAN_ENTER_FIELD(e, x, y, condition) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, (condition))
+
+#define SPRING_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_2(e, x, y, 0)
+
+#define SPRING_CAN_BUMP_FROM_FIELD(x, y) \
+ (IN_LEV_FIELD(x, y) && (Feld[x][y] == EL_EMC_SPRING_BUMPER || \
+ Feld[x][y] == EL_EMC_SPRING_BUMPER_ACTIVE))
+
+#define MOVE_ENTER_EL(e) (element_info[e].move_enter_element)
+
+#define CE_ENTER_FIELD_COND(e, x, y) \
+ (!IS_PLAYER(x, y) && \
+ IS_EQUAL_OR_IN_GROUP(Feld[x][y], MOVE_ENTER_EL(e)))
+
+#define CUSTOM_ELEMENT_CAN_ENTER_FIELD(e, x, y) \
+ ELEMENT_CAN_ENTER_FIELD_BASE_4(e, x, y, CE_ENTER_FIELD_COND(e, x, y))
+
+#define IN_LEV_FIELD_AND_IS_FREE(x, y) (IN_LEV_FIELD(x, y) && IS_FREE(x, y))
+#define IN_LEV_FIELD_AND_NOT_FREE(x, y) (IN_LEV_FIELD(x, y) && !IS_FREE(x, y))
+
+#define ACCESS_FROM(e, d) (element_info[e].access_direction &(d))
+#define IS_WALKABLE_FROM(e, d) (IS_WALKABLE(e) && ACCESS_FROM(e, d))
+#define IS_PASSABLE_FROM(e, d) (IS_PASSABLE(e) && ACCESS_FROM(e, d))
+#define IS_ACCESSIBLE_FROM(e, d) (IS_ACCESSIBLE(e) && ACCESS_FROM(e, d))
+
+/* game button identifiers */
+#define GAME_CTRL_ID_STOP 0
+#define GAME_CTRL_ID_PAUSE 1
+#define GAME_CTRL_ID_PLAY 2
+#define SOUND_CTRL_ID_MUSIC 3
+#define SOUND_CTRL_ID_LOOPS 4
+#define SOUND_CTRL_ID_SIMPLE 5
+#define GAME_CTRL_ID_SAVE 6
+#define GAME_CTRL_ID_LOAD 7
+
+#define NUM_GAME_BUTTONS 8
+
+
+/* forward declaration for internal use */
+
+static void CreateField(int, int, int);
+
+static void ResetGfxAnimation(int, int);
+
+static void SetPlayerWaiting(struct PlayerInfo *, boolean);
+static void AdvanceFrameAndPlayerCounters(int);
+
+static boolean MovePlayerOneStep(struct PlayerInfo *, int, int, int, int);
+static boolean MovePlayer(struct PlayerInfo *, int, int);
+static void ScrollPlayer(struct PlayerInfo *, int);
+static void ScrollScreen(struct PlayerInfo *, int);
+
+static int DigField(struct PlayerInfo *, int, int, int, int, int, int, int);
+static boolean DigFieldByCE(int, int, int);
+static boolean SnapField(struct PlayerInfo *, int, int);
+static boolean DropElement(struct PlayerInfo *);
+
+static void InitBeltMovement(void);
+static void CloseAllOpenTimegates(void);
+static void CheckGravityMovement(struct PlayerInfo *);
+static void CheckGravityMovementWhenNotMoving(struct PlayerInfo *);
+static void KillPlayerUnlessEnemyProtected(int, int);
+static void KillPlayerUnlessExplosionProtected(int, int);
+
+static void TestIfPlayerTouchesCustomElement(int, int);
+static void TestIfElementTouchesCustomElement(int, int);
+static void TestIfElementHitsCustomElement(int, int, int);
+#if 0
+static void TestIfElementSmashesCustomElement(int, int, int);
+#endif
+
+static void HandleElementChange(int, int, int);
+static void ExecuteCustomElementAction(int, int, int, int);
+static boolean ChangeElement(int, int, int, int);
+
+static boolean CheckTriggeredElementChangeExt(int, int, int, int, int,int,int);
+#define CheckTriggeredElementChange(x, y, e, ev) \
+ CheckTriggeredElementChangeExt(x,y,e,ev, CH_PLAYER_ANY,CH_SIDE_ANY, -1)
+#define CheckTriggeredElementChangeByPlayer(x, y, e, ev, p, s) \
+ CheckTriggeredElementChangeExt(x, y, e, ev, p, s, -1)
+#define CheckTriggeredElementChangeBySide(x, y, e, ev, s) \
+ CheckTriggeredElementChangeExt(x, y, e, ev, CH_PLAYER_ANY, s, -1)
+#define CheckTriggeredElementChangeByPage(x, y, e, ev, p) \
+ CheckTriggeredElementChangeExt(x,y,e,ev, CH_PLAYER_ANY, CH_SIDE_ANY, p)
+
+static boolean CheckElementChangeExt(int, int, int, int, int, int, int);
+#define CheckElementChange(x, y, e, te, ev) \
+ CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, CH_SIDE_ANY)
+#define CheckElementChangeByPlayer(x, y, e, ev, p, s) \
+ CheckElementChangeExt(x, y, e, EL_EMPTY, ev, p, s)
+#define CheckElementChangeBySide(x, y, e, te, ev, s) \
+ CheckElementChangeExt(x, y, e, te, ev, CH_PLAYER_ANY, s)
+
+static void PlayLevelSound(int, int, int);
+static void PlayLevelSoundNearest(int, int, int);
+static void PlayLevelSoundAction(int, int, int);
+static void PlayLevelSoundElementAction(int, int, int, int);
+static void PlayLevelSoundElementActionIfLoop(int, int, int, int);
+static void PlayLevelSoundActionIfLoop(int, int, int);
+static void StopLevelSoundActionIfLoop(int, int, int);
+static void PlayLevelMusic();
+
+static void HandleGameButtons(struct GadgetInfo *);
+
+int AmoebeNachbarNr(int, int);
+void AmoebeUmwandeln(int, int);
+void ContinueMoving(int, int);
+void Bang(int, int);
+void InitMovDir(int, int);
+void InitAmoebaNr(int, int);
+int NewHiScore(void);
+
+void TestIfGoodThingHitsBadThing(int, int, int);
+void TestIfBadThingHitsGoodThing(int, int, int);
+void TestIfPlayerTouchesBadThing(int, int);
+void TestIfPlayerRunsIntoBadThing(int, int, int);
+void TestIfBadThingTouchesPlayer(int, int);
+void TestIfBadThingRunsIntoPlayer(int, int, int);
+void TestIfFriendTouchesBadThing(int, int);
+void TestIfBadThingTouchesFriend(int, int);
+void TestIfBadThingTouchesOtherBadThing(int, int);
+void TestIfGoodThingGetsHitByBadThing(int, int, int);