X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fgame.c;h=abf350ce93311d668bc344cc1301affb90fa0a1e;hp=3985ce1b47564ae57618bd167260cb80bc41a71b;hb=HEAD;hpb=1d00f4f75136458f4ac891dd89dceed9b50c57a8

diff --git a/src/game.c b/src/game.c
index 3985ce1b..fd943b99 100644
--- a/src/game.c
+++ b/src/game.c
@@ -962,7 +962,7 @@ static struct GamePanelControlInfo game_panel_controls[] =
 	ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x, y, Tile[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(Tile[x][y]))
+	ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x, y, IS_FOOD_DARK_YAMYAM(Tile[x][y]))
 
 #define PACMAN_CAN_ENTER_FIELD(e, x, y)					\
 	ELEMENT_CAN_ENTER_FIELD_BASE_3(e, x, y, IS_AMOEBOID(Tile[x][y]))
@@ -1017,19 +1017,22 @@ static struct GamePanelControlInfo game_panel_controls[] =
 #define GAME_CTRL_ID_SAVE		5
 #define GAME_CTRL_ID_PAUSE2		6
 #define GAME_CTRL_ID_LOAD		7
-#define GAME_CTRL_ID_PANEL_STOP		8
-#define GAME_CTRL_ID_PANEL_PAUSE	9
-#define GAME_CTRL_ID_PANEL_PLAY		10
-#define GAME_CTRL_ID_TOUCH_STOP		11
-#define GAME_CTRL_ID_TOUCH_PAUSE	12
-#define SOUND_CTRL_ID_MUSIC		13
-#define SOUND_CTRL_ID_LOOPS		14
-#define SOUND_CTRL_ID_SIMPLE		15
-#define SOUND_CTRL_ID_PANEL_MUSIC	16
-#define SOUND_CTRL_ID_PANEL_LOOPS	17
-#define SOUND_CTRL_ID_PANEL_SIMPLE	18
-
-#define NUM_GAME_BUTTONS		19
+#define GAME_CTRL_ID_RESTART		8
+#define GAME_CTRL_ID_PANEL_STOP		9
+#define GAME_CTRL_ID_PANEL_PAUSE	10
+#define GAME_CTRL_ID_PANEL_PLAY		11
+#define GAME_CTRL_ID_PANEL_RESTART	12
+#define GAME_CTRL_ID_TOUCH_STOP		13
+#define GAME_CTRL_ID_TOUCH_PAUSE	14
+#define GAME_CTRL_ID_TOUCH_RESTART	15
+#define SOUND_CTRL_ID_MUSIC		16
+#define SOUND_CTRL_ID_LOOPS		17
+#define SOUND_CTRL_ID_SIMPLE		18
+#define SOUND_CTRL_ID_PANEL_MUSIC	19
+#define SOUND_CTRL_ID_PANEL_LOOPS	20
+#define SOUND_CTRL_ID_PANEL_SIMPLE	21
+
+#define NUM_GAME_BUTTONS		22
 
 
 // forward declaration for internal use
@@ -1069,9 +1072,9 @@ 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);
+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)
+	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)		\
@@ -1554,6 +1557,14 @@ access_direction_list[] =
   { EL_UNDEFINED,			MV_NONE				     }
 };
 
+static struct XY xy_topdown[] =
+{
+  {  0, -1 },
+  { -1,  0 },
+  { +1,  0 },
+  {  0, +1 }
+};
+
 static boolean trigger_events[MAX_NUM_ELEMENTS][NUM_CHANGE_EVENTS];
 
 #define IS_AUTO_CHANGING(e)	(element_info[e].has_change_event[CE_DELAY])
@@ -1776,7 +1787,7 @@ static void InitPlayerField(int x, int y, int element, boolean init_game)
       player->active = TRUE;
 
       // remove potentially duplicate players
-      if (StorePlayer[jx][jy] == Tile[x][y])
+      if (IN_LEV_FIELD(jx, jy) && StorePlayer[jx][jy] == Tile[x][y])
 	StorePlayer[jx][jy] = 0;
 
       StorePlayer[x][y] = Tile[x][y];
@@ -2239,7 +2250,7 @@ static void UpdateGameControlValues(void)
 	      game_sp.time_played :
 	      level.game_engine_type == GAME_ENGINE_TYPE_MM ?
 	      game_mm.energy_left :
-	      game.no_time_limit ? TimePlayed : TimeLeft);
+	      game.no_level_time_limit ? TimePlayed : TimeLeft);
   int score = (game.LevelSolved ?
 	       game.LevelSolved_CountingScore :
 	       level.game_engine_type == GAME_ENGINE_TYPE_EM ?
@@ -2558,7 +2569,9 @@ static void UpdateGameControlValues(void)
 	int element = gpc->value;
 	int graphic = el2panelimg(element);
 	int init_gfx_random = (graphic_info[graphic].anim_global_sync ?
-			       sync_random_frame : INIT_GFX_RANDOM());
+			       sync_random_frame :
+			       graphic_info[graphic].anim_global_anim_sync ?
+			       getGlobalAnimSyncFrame() : INIT_GFX_RANDOM());
 
 	if (gpc->value != gpc->last_value)
 	{
@@ -2593,7 +2606,9 @@ static void UpdateGameControlValues(void)
 	int last_anim_random_frame = gfx.anim_random_frame;
 	int graphic = gpc->graphic;
 	int init_gfx_random = (graphic_info[graphic].anim_global_sync ?
-			       sync_random_frame : INIT_GFX_RANDOM());
+			       sync_random_frame :
+			       graphic_info[graphic].anim_global_anim_sync ?
+			       getGlobalAnimSyncFrame() : INIT_GFX_RANDOM());
 
 	if (gpc->value != gpc->last_value)
 	{
@@ -3083,6 +3098,9 @@ static void InitGameEngine(void)
   game_em.use_single_button =
     (game.engine_version > VERSION_IDENT(4,0,0,2));
 
+  game_em.use_push_delay =
+    (game.engine_version > VERSION_IDENT(4,3,7,1));
+
   game_em.use_snap_key_bug =
     (game.engine_version < VERSION_IDENT(4,0,1,0));
 
@@ -3183,6 +3201,17 @@ static void InitGameEngine(void)
     SET_PROPERTY(ch_delay->element, EP_CAN_CHANGE_OR_HAS_ACTION, TRUE);
   }
 
+  // ---------- initialize if element can trigger global animations -----------
+
+  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
+  {
+    struct ElementInfo *ei = &element_info[i];
+
+    ei->has_anim_event = FALSE;
+  }
+
+  InitGlobalAnimEventsForCustomElements();
+
   // ---------- initialize internal run-time variables ------------------------
 
   for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
@@ -3248,12 +3277,16 @@ static void InitGameEngine(void)
 
     for (j = 0; j < ei->num_change_pages; j++)
     {
-      ei->change_page[j].actual_trigger_element = EL_EMPTY;
-      ei->change_page[j].actual_trigger_player = EL_EMPTY;
-      ei->change_page[j].actual_trigger_player_bits = CH_PLAYER_NONE;
-      ei->change_page[j].actual_trigger_side = CH_SIDE_NONE;
-      ei->change_page[j].actual_trigger_ce_value = 0;
-      ei->change_page[j].actual_trigger_ce_score = 0;
+      struct ElementChangeInfo *change = &ei->change_page[j];
+
+      change->actual_trigger_element = EL_EMPTY;
+      change->actual_trigger_player = EL_EMPTY;
+      change->actual_trigger_player_bits = CH_PLAYER_NONE;
+      change->actual_trigger_side = CH_SIDE_NONE;
+      change->actual_trigger_ce_value = 0;
+      change->actual_trigger_ce_score = 0;
+      change->actual_trigger_x = -1;
+      change->actual_trigger_y = -1;
     }
   }
 
@@ -3271,16 +3304,18 @@ static void InitGameEngine(void)
 
     for (j = 0; j < ei->num_change_pages; j++)
     {
-      if (!ei->change_page[j].can_change_or_has_action)
+      struct ElementChangeInfo *change = &ei->change_page[j];
+
+      if (!change->can_change_or_has_action)
 	continue;
 
-      if (ei->change_page[j].has_event[CE_BY_OTHER_ACTION])
+      if (change->has_event[CE_BY_OTHER_ACTION])
       {
-	int trigger_element = ei->change_page[j].trigger_element;
+	int trigger_element = change->trigger_element;
 
 	for (k = 0; k < NUM_CHANGE_EVENTS; k++)
 	{
-	  if (ei->change_page[j].has_event[k])
+	  if (change->has_event[k])
 	  {
 	    if (IS_GROUP_ELEMENT(trigger_element))
 	    {
@@ -3447,8 +3482,9 @@ static void InitGameEngine(void)
      level.game_engine_type == GAME_ENGINE_TYPE_EM &&
      !setup.forced_scroll_delay           ? 0 :
      setup.scroll_delay                   ? setup.scroll_delay_value       : 0);
-  game.scroll_delay_value =
-    MIN(MAX(MIN_SCROLL_DELAY, game.scroll_delay_value), MAX_SCROLL_DELAY);
+  if (game.forced_scroll_delay_value == -1)
+    game.scroll_delay_value =
+      MIN(MAX(MIN_SCROLL_DELAY, game.scroll_delay_value), MAX_SCROLL_DELAY);
 
   // ---------- initialize game engine snapshots ------------------------------
   for (i = 0; i < MAX_PLAYERS; i++)
@@ -3489,10 +3525,10 @@ static void InitGameEngine(void)
     {
       int element = EL_CUSTOM_START + i;
 
-      if (HAS_CHANGE_EVENT(element, CE_CLICKED_BY_MOUSE) ||
-	  HAS_CHANGE_EVENT(element, CE_PRESSED_BY_MOUSE) ||
-	  HAS_CHANGE_EVENT(element, CE_MOUSE_CLICKED_ON_X) ||
-	  HAS_CHANGE_EVENT(element, CE_MOUSE_PRESSED_ON_X))
+      if (HAS_ANY_CHANGE_EVENT(element, CE_CLICKED_BY_MOUSE) ||
+	  HAS_ANY_CHANGE_EVENT(element, CE_PRESSED_BY_MOUSE) ||
+	  HAS_ANY_CHANGE_EVENT(element, CE_MOUSE_CLICKED_ON_X) ||
+	  HAS_ANY_CHANGE_EVENT(element, CE_MOUSE_PRESSED_ON_X))
 	game.use_mouse_actions = TRUE;
     }
   }
@@ -3561,7 +3597,7 @@ void InitGame(void)
   int full_lev_fieldx = lev_fieldx + (BorderElement != EL_EMPTY ? 2 : 0);
   int full_lev_fieldy = lev_fieldy + (BorderElement != EL_EMPTY ? 2 : 0);
   int fade_mask = REDRAW_FIELD;
-
+  boolean restarting = (game_status == GAME_MODE_PLAYING);
   boolean emulate_bd = TRUE;	// unless non-BOULDERDASH elements found
   boolean emulate_sp = TRUE;	// unless non-SUPAPLEX    elements found
   int initial_move_dir = MV_DOWN;
@@ -3573,7 +3609,15 @@ void InitGame(void)
   if (!game.restart_level)
     CloseDoor(DOOR_CLOSE_1);
 
-  SetGameStatus(GAME_MODE_PLAYING);
+  if (restarting)
+  {
+    // force fading out global animations displayed during game play
+    SetGameStatus(GAME_MODE_PSEUDO_RESTARTING);
+  }
+  else
+  {
+    SetGameStatus(GAME_MODE_PLAYING);
+  }
 
   if (level_editor_test_game)
     FadeSkipNextFadeOut();
@@ -3589,6 +3633,18 @@ void InitGame(void)
 
   FadeOut(fade_mask);
 
+  if (restarting)
+  {
+    // force restarting global animations displayed during game play
+    RestartGlobalAnimsByStatus(GAME_MODE_PSEUDO_RESTARTING);
+
+    // this is required for "transforming" fade modes like cross-fading
+    // (else global animations will be stopped, but not restarted here)
+    SetAnimStatusBeforeFading(GAME_MODE_PSEUDO_RESTARTING);
+
+    SetGameStatus(GAME_MODE_PLAYING);
+  }
+
   if (level_editor_test_game)
     FadeSkipNextFadeIn();
 
@@ -3680,7 +3736,8 @@ void InitGame(void)
 
     player->can_fall_into_acid = CAN_MOVE_INTO_ACID(player->element_nr);
 
-    player->actual_frame_counter = 0;
+    player->actual_frame_counter.count = 0;
+    player->actual_frame_counter.value = 1;
 
     player->step_counter = 0;
 
@@ -3816,9 +3873,12 @@ void InitGame(void)
   game.LevelSolved_CountingScore = 0;
   game.LevelSolved_CountingHealth = 0;
 
+  game.RestartGameRequested = FALSE;
+
   game.panel.active = TRUE;
 
-  game.no_time_limit = (level.time == 0);
+  game.no_level_time_limit = (level.time == 0);
+  game.time_limit = (leveldir_current->time_limit && setup.time_limit);
 
   game.yamyam_content_nr = 0;
   game.robot_wheel_active = FALSE;
@@ -3921,6 +3981,10 @@ void InitGame(void)
 
   InitBeltMovement();
 
+  // required if level does not contain any "empty space" element
+  if (element_info[EL_EMPTY].use_gfx_element)
+    game.use_masked_elements = TRUE;
+
   for (i = 0; i < MAX_PLAYERS; i++)
   {
     struct PlayerInfo *player = &stored_player[i];
@@ -4395,6 +4459,11 @@ void InitGame(void)
     scroll_y = SCROLL_POSITION_Y(local_player->jy);
   }
 
+  if (game.forced_scroll_x != ARG_UNDEFINED_VALUE)
+    scroll_x = game.forced_scroll_x;
+  if (game.forced_scroll_y != ARG_UNDEFINED_VALUE)
+    scroll_y = game.forced_scroll_y;
+
   // !!! FIX THIS (START) !!!
   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
   {
@@ -4485,10 +4554,7 @@ void InitGame(void)
   }
 
   game.restart_level = FALSE;
-  game.restart_game_message = NULL;
-
   game.request_active = FALSE;
-  game.request_active_or_moving = FALSE;
 
   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
     InitGameActions_MM();
@@ -4726,7 +4792,7 @@ void InitAmoebaNr(int x, int y)
 
 static void LevelSolved_SetFinalGameValues(void)
 {
-  game.time_final = (game.no_time_limit ? TimePlayed : TimeLeft);
+  game.time_final = (game.no_level_time_limit ? TimePlayed : TimeLeft);
   game.score_time_final = (level.use_step_counter ? TimePlayed :
 			   TimePlayed * FRAMES_PER_SECOND + TimeFrames);
 
@@ -4767,6 +4833,8 @@ static void LevelSolved(void)
   game.LevelSolved = TRUE;
   game.GameOver = TRUE;
 
+  tape.solved = TRUE;
+
   // needed here to display correct panel values while player walks into exit
   LevelSolved_SetFinalGameValues();
 }
@@ -4835,7 +4903,7 @@ void GameWon(void)
 	time_final = 0;
 	time_frames = time_frames_left;
       }
-      else if (game.no_time_limit && TimePlayed < time_final_max)
+      else if (game.no_level_time_limit && TimePlayed < time_final_max)
       {
 	time_final = time_final_max;
 	time_frames = time_frames_final_max - time_frames_played;
@@ -5106,10 +5174,11 @@ static int addScoreEntry(struct ScoreInfo *list, struct ScoreEntry *new_entry,
     if (strEqual(new_entry->tape_basename, entry->tape_basename) &&
 	!strEqual(new_entry->tape_basename, UNDEFINED_FILENAME))
     {
-      // special case: use server score instead of local score value if higher
-      // (historic scores might have been truncated to 16-bit values locally)
-      if (score_is_better)
-	entry->score = new_entry->score;
+      // add fields from server score entry not stored in local score entry
+      // (currently, this means setting platform, version and country fields;
+      // in rare cases, this may also correct an invalid score value, as
+      // historic scores might have been truncated to 16-bit values locally)
+      *entry = *new_entry;
 
       return -1;
     }
@@ -5292,6 +5361,8 @@ static void ResetGfxFrame(int x, int y)
 
   if (graphic_info[graphic].anim_global_sync)
     GfxFrame[x][y] = FrameCounter;
+  else if (graphic_info[graphic].anim_global_anim_sync)
+    GfxFrame[x][y] = getGlobalAnimSyncFrame();
   else if (ANIM_MODE(graphic) == ANIM_CE_VALUE)
     GfxFrame[x][y] = CustomValue[x][y];
   else if (ANIM_MODE(graphic) == ANIM_CE_SCORE)
@@ -5371,17 +5442,9 @@ void Moving2Blocked(int x, int y, int *goes_to_x, int *goes_to_y)
 
 void Blocked2Moving(int x, int y, int *comes_from_x, int *comes_from_y)
 {
-  int oldx = x, oldy = y;
   int direction = MovDir[x][y];
-
-  if (direction == MV_LEFT)
-    oldx++;
-  else if (direction == MV_RIGHT)
-    oldx--;
-  else if (direction == MV_UP)
-    oldy++;
-  else if (direction == MV_DOWN)
-    oldy--;
+  int oldx = x + (direction & MV_LEFT ? +1 : direction & MV_RIGHT ? -1 : 0);
+  int oldy = y + (direction & MV_UP   ? +1 : direction & MV_DOWN  ? -1 : 0);
 
   *comes_from_x = oldx;
   *comes_from_y = oldy;
@@ -5396,16 +5459,17 @@ static int MovingOrBlocked2Element(int x, int y)
     int oldx, oldy;
 
     Blocked2Moving(x, y, &oldx, &oldy);
+
     return Tile[oldx][oldy];
   }
-  else
-    return element;
+
+  return element;
 }
 
 static int MovingOrBlocked2ElementIfNotLeaving(int x, int y)
 {
   // like MovingOrBlocked2Element(), but if element is moving
-  // and (x,y) is the field the moving element is just leaving,
+  // and (x, y) is the field the moving element is just leaving,
   // return EL_BLOCKED instead of the element value
   int element = Tile[x][y];
 
@@ -5598,7 +5662,7 @@ static void setScreenCenteredToAllPlayers(int *sx, int *sy)
   *sy = (sy1 + sy2) / 2;
 }
 
-static void DrawRelocateScreen(int old_x, int old_y, int x, int y, int move_dir,
+static void DrawRelocateScreen(int old_x, int old_y, int x, int y,
 			       boolean center_screen, boolean quick_relocation)
 {
   unsigned int frame_delay_value_old = GetVideoFrameDelay();
@@ -5628,14 +5692,47 @@ static void DrawRelocateScreen(int old_x, int old_y, int x, int y, int move_dir,
   {
     // relocation _without_ centering of screen
 
-    int center_scroll_x = SCROLL_POSITION_X(old_x);
-    int center_scroll_y = SCROLL_POSITION_Y(old_y);
-    int offset_x = x + (scroll_x - center_scroll_x);
-    int offset_y = y + (scroll_y - center_scroll_y);
+    // apply distance between old and new player position to scroll position
+    int shifted_scroll_x = scroll_x + (x - old_x);
+    int shifted_scroll_y = scroll_y + (y - old_y);
+
+    // make sure that shifted scroll position does not scroll beyond screen
+    new_scroll_x = SCROLL_POSITION_X(shifted_scroll_x + MIDPOSX);
+    new_scroll_y = SCROLL_POSITION_Y(shifted_scroll_y + MIDPOSY);
 
-    // for new screen position, apply previous offset to center position
-    new_scroll_x = SCROLL_POSITION_X(offset_x);
-    new_scroll_y = SCROLL_POSITION_Y(offset_y);
+    // special case for teleporting from one end of the playfield to the other
+    // (this kludge prevents the destination area to be shifted by half a tile
+    // against the source destination for even screen width or screen height;
+    // probably most useful when used with high "game.forced_scroll_delay_value"
+    // in combination with "game.forced_scroll_x" and "game.forced_scroll_y")
+    if (quick_relocation)
+    {
+      if (EVEN(SCR_FIELDX))
+      {
+	// relocate (teleport) between left and right border (half or full)
+	if (scroll_x == SBX_Left && new_scroll_x == SBX_Right - 1)
+	  new_scroll_x = SBX_Right;
+	else if (scroll_x == SBX_Left + 1 && new_scroll_x == SBX_Right)
+	  new_scroll_x = SBX_Right - 1;
+	else if (scroll_x == SBX_Right && new_scroll_x == SBX_Left + 1)
+	  new_scroll_x = SBX_Left;
+	else if (scroll_x == SBX_Right - 1 && new_scroll_x == SBX_Left)
+	  new_scroll_x = SBX_Left + 1;
+      }
+
+      if (EVEN(SCR_FIELDY))
+      {
+	// relocate (teleport) between top and bottom border (half or full)
+	if (scroll_y == SBY_Upper && new_scroll_y == SBY_Lower - 1)
+	  new_scroll_y = SBY_Lower;
+	else if (scroll_y == SBY_Upper + 1 && new_scroll_y == SBY_Lower)
+	  new_scroll_y = SBY_Lower - 1;
+	else if (scroll_y == SBY_Lower && new_scroll_y == SBY_Upper + 1)
+	  new_scroll_y = SBY_Upper;
+	else if (scroll_y == SBY_Lower - 1 && new_scroll_y == SBY_Upper)
+	  new_scroll_y = SBY_Upper + 1;
+      }
+    }
   }
 
   if (quick_relocation)
@@ -5769,7 +5866,7 @@ static void RelocatePlayer(int jx, int jy, int el_player_raw)
   }
 
   // only visually relocate centered player
-  DrawRelocateScreen(old_jx, old_jy, player->jx, player->jy, player->MovDir,
+  DrawRelocateScreen(old_jx, old_jy, player->jx, player->jy,
 		     FALSE, level.instant_relocation);
 
   TestIfPlayerTouchesBadThing(jx, jy);
@@ -5802,9 +5899,6 @@ static void Explode(int ex, int ey, int phase, int mode)
   int last_phase;
   int border_element;
 
-  // !!! eliminate this variable !!!
-  int delay = (game.emulation == EMU_SUPAPLEX ? 3 : 2);
-
   if (game.explosions_delayed)
   {
     ExplodeField[ex][ey] = mode;
@@ -5814,6 +5908,8 @@ static void Explode(int ex, int ey, int phase, int mode)
   if (phase == EX_PHASE_START)		// initialize 'Store[][]' field
   {
     int center_element = Tile[ex][ey];
+    int ce_value = CustomValue[ex][ey];
+    int ce_score = element_info[center_element].collect_score;
     int artwork_element, explosion_element;	// set these values later
 
     // remove things displayed in background while burning dynamite
@@ -5952,6 +6048,14 @@ static void Explode(int ex, int ey, int phase, int mode)
       else
 	Store[x][y] = EL_EMPTY;
 
+      if (IS_CUSTOM_ELEMENT(center_element))
+	Store[x][y] = (Store[x][y] == EL_CURRENT_CE_VALUE ? ce_value :
+		       Store[x][y] == EL_CURRENT_CE_SCORE ? ce_score :
+		       Store[x][y] >= EL_PREV_CE_8 &&
+		       Store[x][y] <= EL_NEXT_CE_8 ?
+		       RESOLVED_REFERENCE_ELEMENT(center_element, Store[x][y]) :
+		       Store[x][y]);
+
       if (x != ex || y != ey || mode == EX_TYPE_BORDER ||
 	  center_element == EL_AMOEBA_TO_DIAMOND)
 	Store2[x][y] = element;
@@ -6085,7 +6189,7 @@ static void Explode(int ex, int ey, int phase, int mode)
     int graphic = el_act2img(GfxElement[x][y], ACTION_EXPLODING);
     int frame = getGraphicAnimationFrameXY(graphic, x, y);
 
-    if (phase == delay)
+    if (phase == 1)
       TEST_DrawLevelFieldCrumbled(x, y);
 
     if (IS_WALKABLE_OVER(Back[x][y]) && Back[x][y] != EL_EMPTY)
@@ -6110,13 +6214,7 @@ static void DynaExplode(int ex, int ey)
   int dynabomb_size = 1;
   boolean dynabomb_xl = FALSE;
   struct PlayerInfo *player;
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   if (IS_ACTIVE_BOMB(dynabomb_element))
   {
@@ -6132,8 +6230,8 @@ static void DynaExplode(int ex, int ey)
   {
     for (j = 1; j <= dynabomb_size; j++)
     {
-      int x = ex + j * xy[i][0];
-      int y = ey + j * xy[i][1];
+      int x = ex + j * xy[i].x;
+      int y = ey + j * xy[i].y;
       int element;
 
       if (!IN_LEV_FIELD(x, y) || IS_INDESTRUCTIBLE(Tile[x][y]))
@@ -6414,7 +6512,7 @@ static void ToggleBeltSwitch(int x, int y)
   }
 }
 
-static void ToggleSwitchgateSwitch(int x, int y)
+static void ToggleSwitchgateSwitch(void)
 {
   int xx, yy;
 
@@ -6894,7 +6992,7 @@ static void Impact(int x, int y)
 		 smashed == EL_DC_SWITCHGATE_SWITCH_UP ||
 		 smashed == EL_DC_SWITCHGATE_SWITCH_DOWN)
 	{
-	  ToggleSwitchgateSwitch(x, y + 1);
+	  ToggleSwitchgateSwitch();
 	}
 	else if (smashed == EL_LIGHT_SWITCH ||
 		 smashed == EL_LIGHT_SWITCH_ACTIVE)
@@ -7268,18 +7366,12 @@ static void TurnRoundExt(int x, int y)
     if (element == EL_PENGUIN)
     {
       int i;
-      static int xy[4][2] =
-      {
-	{ 0, -1 },
-	{ -1, 0 },
-	{ +1, 0 },
-	{ 0, +1 }
-      };
+      struct XY *xy = xy_topdown;
 
       for (i = 0; i < NUM_DIRECTIONS; i++)
       {
-    	int ex = x + xy[i][0];
-    	int ey = y + xy[i][1];
+	int ex = x + xy[i].x;
+	int ey = y + xy[i].y;
 
     	if (IN_LEV_FIELD(ex, ey) && (Tile[ex][ey] == EL_EXIT_OPEN ||
 				     Tile[ex][ey] == EL_EM_EXIT_OPEN ||
@@ -7523,7 +7615,7 @@ static void TurnRoundExt(int x, int y)
     boolean can_turn_left =
       CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, left_x, left_y);
     boolean can_turn_right =
-      CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, right_x,right_y);
+      CUSTOM_ELEMENT_CAN_ENTER_FIELD(element, right_x, right_y);
 
     if (element_info[element].move_stepsize == 0)	// "not moving"
       return;
@@ -7678,25 +7770,13 @@ static void TurnRoundExt(int x, int y)
   }
   else if (move_pattern & MV_MAZE_RUNNER_STYLE)
   {
-    static int test_xy[7][2] =
-    {
-      { 0, -1 },
-      { -1, 0 },
-      { +1, 0 },
-      { 0, +1 },
-      { 0, -1 },
-      { -1, 0 },
-      { +1, 0 },
-    };
-    static int test_dir[7] =
+    struct XY *test_xy = xy_topdown;
+    static int test_dir[4] =
     {
       MV_UP,
       MV_LEFT,
       MV_RIGHT,
-      MV_DOWN,
-      MV_UP,
-      MV_LEFT,
-      MV_RIGHT,
+      MV_DOWN
     };
     boolean hunter_mode = (move_pattern == MV_MAZE_HUNTER);
     int move_preference = -1000000;	// start with very low preference
@@ -7706,11 +7786,12 @@ static void TurnRoundExt(int x, int y)
 
     for (i = 0; i < NUM_DIRECTIONS; i++)
     {
-      int move_dir = test_dir[start_test + i];
+      int j = (start_test + i) % 4;
+      int move_dir = test_dir[j];
       int move_dir_preference;
 
-      xx = x + test_xy[start_test + i][0];
-      yy = y + test_xy[start_test + i][1];
+      xx = x + test_xy[j].x;
+      yy = y + test_xy[j].y;
 
       if (hunter_mode && IN_LEV_FIELD(xx, yy) &&
 	  (IS_PLAYER(xx, yy) || Tile[xx][yy] == EL_PLAYER_IS_LEAVING))
@@ -8364,7 +8445,7 @@ static void StartMoving(int x, int y)
 
 	PlayLevelSound(newx, newy, SND_PENGUIN_PASSING);
 	if (IN_SCR_FIELD(SCREENX(newx), SCREENY(newy)))
-	  DrawGraphicThruMask(SCREENX(newx),SCREENY(newy), el2img(element), 0);
+	  DrawGraphicThruMask(SCREENX(newx), SCREENY(newy), el2img(element), 0);
 
 	game.friends_still_needed--;
 	if (!game.friends_still_needed &&
@@ -8376,7 +8457,7 @@ static void StartMoving(int x, int y)
       }
       else if (IS_FOOD_PENGUIN(Tile[newx][newy]))
       {
-	if (DigField(local_player, x, y, newx, newy, 0,0, DF_DIG) == MP_MOVING)
+	if (DigField(local_player, x, y, newx, newy, 0, 0, DF_DIG) == MP_MOVING)
 	  TEST_DrawLevelField(newx, newy);
 	else
 	  GfxDir[x][y] = MovDir[x][y] = MV_NONE;
@@ -8681,7 +8762,7 @@ void ContinueMoving(int x, int y)
 
   if (pushed_by_player)		// special case: moving object pushed by player
   {
-    MovPos[x][y] = SIGN(MovPos[x][y]) * (TILEX - ABS(PLAYERINFO(x,y)->MovPos));
+    MovPos[x][y] = SIGN(MovPos[x][y]) * (TILEX - ABS(PLAYERINFO(x, y)->MovPos));
   }
   else if (use_step_delay)	// special case: moving object has step delay
   {
@@ -8943,7 +9024,7 @@ void ContinueMoving(int x, int y)
 
     CheckElementChangeByPlayer(newx, newy, element, CE_PUSHED_BY_PLAYER,
 			       player->index_bit, push_side);
-    CheckTriggeredElementChangeByPlayer(newx,newy, element, CE_PLAYER_PUSHES_X,
+    CheckTriggeredElementChangeByPlayer(newx, newy, element, CE_PLAYER_PUSHES_X,
 					player->index_bit, push_side);
   }
 
@@ -8968,18 +9049,12 @@ int AmoebaNeighbourNr(int ax, int ay)
   int i;
   int element = Tile[ax][ay];
   int group_nr = 0;
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int x = ax + xy[i][0];
-    int y = ay + xy[i][1];
+    int x = ax + xy[i].x;
+    int y = ay + xy[i].y;
 
     if (!IN_LEV_FIELD(x, y))
       continue;
@@ -8995,21 +9070,15 @@ static void AmoebaMerge(int ax, int ay)
 {
   int i, x, y, xx, yy;
   int new_group_nr = AmoebaNr[ax][ay];
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   if (new_group_nr == 0)
     return;
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    x = ax + xy[i][0];
-    y = ay + xy[i][1];
+    x = ax + xy[i].x;
+    y = ay + xy[i].y;
 
     if (!IN_LEV_FIELD(x, y))
       continue;
@@ -9072,18 +9141,12 @@ void AmoebaToDiamond(int ax, int ay)
   }
   else
   {
-    static int xy[4][2] =
-    {
-      { 0, -1 },
-      { -1, 0 },
-      { +1, 0 },
-      { 0, +1 }
-    };
+    struct XY *xy = xy_topdown;
 
     for (i = 0; i < NUM_DIRECTIONS; i++)
     {
-      x = ax + xy[i][0];
-      y = ay + xy[i][1];
+      x = ax + xy[i].x;
+      y = ay + xy[i].y;
 
       if (!IN_LEV_FIELD(x, y))
 	continue;
@@ -9138,17 +9201,16 @@ static void AmoebaToDiamondBD(int ax, int ay, int new_element)
 
 static void AmoebaGrowing(int x, int y)
 {
-  static unsigned int sound_delay = 0;
-  static unsigned int sound_delay_value = 0;
+  static DelayCounter sound_delay = { 0 };
 
   if (!MovDelay[x][y])		// start new growing cycle
   {
     MovDelay[x][y] = 7;
 
-    if (DelayReached(&sound_delay, sound_delay_value))
+    if (DelayReached(&sound_delay))
     {
       PlayLevelSoundElementAction(x, y, Store[x][y], ACTION_GROWING);
-      sound_delay_value = 30;
+      sound_delay.value = 30;
     }
   }
 
@@ -9174,15 +9236,14 @@ static void AmoebaGrowing(int x, int y)
 
 static void AmoebaShrinking(int x, int y)
 {
-  static unsigned int sound_delay = 0;
-  static unsigned int sound_delay_value = 0;
+  static DelayCounter sound_delay = { 0 };
 
   if (!MovDelay[x][y])		// start new shrinking cycle
   {
     MovDelay[x][y] = 7;
 
-    if (DelayReached(&sound_delay, sound_delay_value))
-      sound_delay_value = 30;
+    if (DelayReached(&sound_delay))
+      sound_delay.value = 30;
   }
 
   if (MovDelay[x][y])		// wait some time before shrinking
@@ -9215,13 +9276,7 @@ static void AmoebaReproduce(int ax, int ay)
   int graphic = el2img(element);
   int newax = ax, neway = ay;
   boolean can_drop = (element == EL_AMOEBA_WET || element == EL_EMC_DRIPPER);
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   if (!level.amoeba_speed && element != EL_EMC_DRIPPER)
   {
@@ -9246,8 +9301,8 @@ static void AmoebaReproduce(int ax, int ay)
   if (can_drop)			// EL_AMOEBA_WET or EL_EMC_DRIPPER
   {
     int start = RND(4);
-    int x = ax + xy[start][0];
-    int y = ay + xy[start][1];
+    int x = ax + xy[start].x;
+    int y = ay + xy[start].y;
 
     if (!IN_LEV_FIELD(x, y))
       return;
@@ -9272,8 +9327,8 @@ static void AmoebaReproduce(int ax, int ay)
     for (i = 0; i < NUM_DIRECTIONS; i++)
     {
       int j = (start + i) % 4;
-      int x = ax + xy[j][0];
-      int y = ay + xy[j][1];
+      int x = ax + xy[j].x;
+      int y = ay + xy[j].y;
 
       if (!IN_LEV_FIELD(x, y))
 	continue;
@@ -9695,7 +9750,7 @@ static void DrawTwinkleOnField(int x, int y)
   }
 }
 
-static void MauerWaechst(int x, int y)
+static void WallGrowing(int x, int y)
 {
   int delay = 6;
 
@@ -9745,15 +9800,59 @@ static void MauerWaechst(int x, int y)
   }
 }
 
-static void MauerAbleger(int ax, int ay)
+static void CheckWallGrowing(int ax, int ay)
 {
   int element = Tile[ax][ay];
   int graphic = el2img(element);
-  boolean oben_frei = FALSE, unten_frei = FALSE;
-  boolean links_frei = FALSE, rechts_frei = FALSE;
-  boolean oben_massiv = FALSE, unten_massiv = FALSE;
-  boolean links_massiv = FALSE, rechts_massiv = FALSE;
-  boolean new_wall = FALSE;
+  boolean free_top    = FALSE;
+  boolean free_bottom = FALSE;
+  boolean free_left   = FALSE;
+  boolean free_right  = FALSE;
+  boolean stop_top    = FALSE;
+  boolean stop_bottom = FALSE;
+  boolean stop_left   = FALSE;
+  boolean stop_right  = FALSE;
+  boolean new_wall    = FALSE;
+
+  boolean is_steelwall  = (element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
+			   element == EL_EXPANDABLE_STEELWALL_VERTICAL ||
+			   element == EL_EXPANDABLE_STEELWALL_ANY);
+
+  boolean grow_vertical   = (element == EL_EXPANDABLE_WALL_VERTICAL ||
+			     element == EL_EXPANDABLE_WALL_ANY ||
+			     element == EL_EXPANDABLE_STEELWALL_VERTICAL ||
+			     element == EL_EXPANDABLE_STEELWALL_ANY);
+
+  boolean grow_horizontal = (element == EL_EXPANDABLE_WALL_HORIZONTAL ||
+			     element == EL_EXPANDABLE_WALL_ANY ||
+			     element == EL_EXPANDABLE_WALL ||
+			     element == EL_BD_EXPANDABLE_WALL ||
+			     element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
+			     element == EL_EXPANDABLE_STEELWALL_ANY);
+
+  boolean stop_vertical   = (element == EL_EXPANDABLE_WALL_VERTICAL ||
+			     element == EL_EXPANDABLE_STEELWALL_VERTICAL);
+
+  boolean stop_horizontal = (element == EL_EXPANDABLE_WALL_HORIZONTAL ||
+			     element == EL_EXPANDABLE_WALL ||
+			     element == EL_EXPANDABLE_STEELWALL_HORIZONTAL);
+
+  int wall_growing = (is_steelwall ?
+		      EL_EXPANDABLE_STEELWALL_GROWING :
+		      EL_EXPANDABLE_WALL_GROWING);
+
+  int gfx_wall_growing_up    = (is_steelwall ?
+				IMG_EXPANDABLE_STEELWALL_GROWING_UP :
+				IMG_EXPANDABLE_WALL_GROWING_UP);
+  int gfx_wall_growing_down  = (is_steelwall ?
+				IMG_EXPANDABLE_STEELWALL_GROWING_DOWN :
+				IMG_EXPANDABLE_WALL_GROWING_DOWN);
+  int gfx_wall_growing_left  = (is_steelwall ?
+				IMG_EXPANDABLE_STEELWALL_GROWING_LEFT :
+				IMG_EXPANDABLE_WALL_GROWING_LEFT);
+  int gfx_wall_growing_right = (is_steelwall ?
+				IMG_EXPANDABLE_STEELWALL_GROWING_RIGHT :
+				IMG_EXPANDABLE_WALL_GROWING_RIGHT);
 
   if (IS_ANIMATED(graphic))
     DrawLevelGraphicAnimationIfNeeded(ax, ay, graphic);
@@ -9769,179 +9868,83 @@ static void MauerAbleger(int ax, int ay)
   }
 
   if (IN_LEV_FIELD(ax, ay - 1) && IS_FREE(ax, ay - 1))
-    oben_frei = TRUE;
+    free_top = TRUE;
   if (IN_LEV_FIELD(ax, ay + 1) && IS_FREE(ax, ay + 1))
-    unten_frei = TRUE;
+    free_bottom = TRUE;
   if (IN_LEV_FIELD(ax - 1, ay) && IS_FREE(ax - 1, ay))
-    links_frei = TRUE;
+    free_left = TRUE;
   if (IN_LEV_FIELD(ax + 1, ay) && IS_FREE(ax + 1, ay))
-    rechts_frei = TRUE;
+    free_right = TRUE;
 
-  if (element == EL_EXPANDABLE_WALL_VERTICAL ||
-      element == EL_EXPANDABLE_WALL_ANY)
+  if (grow_vertical)
   {
-    if (oben_frei)
+    if (free_top)
     {
-      Tile[ax][ay - 1] = EL_EXPANDABLE_WALL_GROWING;
+      Tile[ax][ay - 1] = wall_growing;
       Store[ax][ay - 1] = element;
       GfxDir[ax][ay - 1] = MovDir[ax][ay - 1] = MV_UP;
-      if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay - 1)))
-	DrawLevelGraphic(ax, ay - 1, IMG_EXPANDABLE_WALL_GROWING_UP, 0);
-      new_wall = TRUE;
-    }
-    if (unten_frei)
-    {
-      Tile[ax][ay + 1] = EL_EXPANDABLE_WALL_GROWING;
-      Store[ax][ay + 1] = element;
-      GfxDir[ax][ay + 1] = MovDir[ax][ay + 1] = MV_DOWN;
-      if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay + 1)))
-	DrawLevelGraphic(ax, ay + 1, IMG_EXPANDABLE_WALL_GROWING_DOWN, 0);
-      new_wall = TRUE;
-    }
-  }
 
-  if (element == EL_EXPANDABLE_WALL_HORIZONTAL ||
-      element == EL_EXPANDABLE_WALL_ANY ||
-      element == EL_EXPANDABLE_WALL ||
-      element == EL_BD_EXPANDABLE_WALL)
-  {
-    if (links_frei)
-    {
-      Tile[ax - 1][ay] = EL_EXPANDABLE_WALL_GROWING;
-      Store[ax - 1][ay] = element;
-      GfxDir[ax - 1][ay] = MovDir[ax - 1][ay] = MV_LEFT;
-      if (IN_SCR_FIELD(SCREENX(ax - 1), SCREENY(ay)))
-	DrawLevelGraphic(ax - 1, ay, IMG_EXPANDABLE_WALL_GROWING_LEFT, 0);
-      new_wall = TRUE;
-    }
+      if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay - 1)))
+	DrawLevelGraphic(ax, ay - 1, gfx_wall_growing_up, 0);
 
-    if (rechts_frei)
-    {
-      Tile[ax + 1][ay] = EL_EXPANDABLE_WALL_GROWING;
-      Store[ax + 1][ay] = element;
-      GfxDir[ax + 1][ay] = MovDir[ax + 1][ay] = MV_RIGHT;
-      if (IN_SCR_FIELD(SCREENX(ax + 1), SCREENY(ay)))
-	DrawLevelGraphic(ax + 1, ay, IMG_EXPANDABLE_WALL_GROWING_RIGHT, 0);
       new_wall = TRUE;
     }
-  }
-
-  if (element == EL_EXPANDABLE_WALL && (links_frei || rechts_frei))
-    TEST_DrawLevelField(ax, ay);
-
-  if (!IN_LEV_FIELD(ax, ay - 1) || IS_WALL(Tile[ax][ay - 1]))
-    oben_massiv = TRUE;
-  if (!IN_LEV_FIELD(ax, ay + 1) || IS_WALL(Tile[ax][ay + 1]))
-    unten_massiv = TRUE;
-  if (!IN_LEV_FIELD(ax - 1, ay) || IS_WALL(Tile[ax - 1][ay]))
-    links_massiv = TRUE;
-  if (!IN_LEV_FIELD(ax + 1, ay) || IS_WALL(Tile[ax + 1][ay]))
-    rechts_massiv = TRUE;
-
-  if (((oben_massiv && unten_massiv) ||
-       element == EL_EXPANDABLE_WALL_HORIZONTAL ||
-       element == EL_EXPANDABLE_WALL) &&
-      ((links_massiv && rechts_massiv) ||
-       element == EL_EXPANDABLE_WALL_VERTICAL))
-    Tile[ax][ay] = EL_WALL;
-
-  if (new_wall)
-    PlayLevelSoundAction(ax, ay, ACTION_GROWING);
-}
-
-static void MauerAblegerStahl(int ax, int ay)
-{
-  int element = Tile[ax][ay];
-  int graphic = el2img(element);
-  boolean oben_frei = FALSE, unten_frei = FALSE;
-  boolean links_frei = FALSE, rechts_frei = FALSE;
-  boolean oben_massiv = FALSE, unten_massiv = FALSE;
-  boolean links_massiv = FALSE, rechts_massiv = FALSE;
-  boolean new_wall = FALSE;
-
-  if (IS_ANIMATED(graphic))
-    DrawLevelGraphicAnimationIfNeeded(ax, ay, graphic);
-
-  if (!MovDelay[ax][ay])	// start building new wall
-    MovDelay[ax][ay] = 6;
-
-  if (MovDelay[ax][ay])		// wait some time before building new wall
-  {
-    MovDelay[ax][ay]--;
-    if (MovDelay[ax][ay])
-      return;
-  }
 
-  if (IN_LEV_FIELD(ax, ay - 1) && IS_FREE(ax, ay - 1))
-    oben_frei = TRUE;
-  if (IN_LEV_FIELD(ax, ay + 1) && IS_FREE(ax, ay + 1))
-    unten_frei = TRUE;
-  if (IN_LEV_FIELD(ax - 1, ay) && IS_FREE(ax - 1, ay))
-    links_frei = TRUE;
-  if (IN_LEV_FIELD(ax + 1, ay) && IS_FREE(ax + 1, ay))
-    rechts_frei = TRUE;
-
-  if (element == EL_EXPANDABLE_STEELWALL_VERTICAL ||
-      element == EL_EXPANDABLE_STEELWALL_ANY)
-  {
-    if (oben_frei)
+    if (free_bottom)
     {
-      Tile[ax][ay - 1] = EL_EXPANDABLE_STEELWALL_GROWING;
-      Store[ax][ay - 1] = element;
-      GfxDir[ax][ay - 1] = MovDir[ax][ay - 1] = MV_UP;
-      if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay - 1)))
-	DrawLevelGraphic(ax, ay - 1, IMG_EXPANDABLE_STEELWALL_GROWING_UP, 0);
-      new_wall = TRUE;
-    }
-    if (unten_frei)
-    {
-      Tile[ax][ay + 1] = EL_EXPANDABLE_STEELWALL_GROWING;
+      Tile[ax][ay + 1] = wall_growing;
       Store[ax][ay + 1] = element;
       GfxDir[ax][ay + 1] = MovDir[ax][ay + 1] = MV_DOWN;
+
       if (IN_SCR_FIELD(SCREENX(ax), SCREENY(ay + 1)))
-	DrawLevelGraphic(ax, ay + 1, IMG_EXPANDABLE_STEELWALL_GROWING_DOWN, 0);
+	DrawLevelGraphic(ax, ay + 1, gfx_wall_growing_down, 0);
+
       new_wall = TRUE;
     }
   }
 
-  if (element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
-      element == EL_EXPANDABLE_STEELWALL_ANY)
+  if (grow_horizontal)
   {
-    if (links_frei)
+    if (free_left)
     {
-      Tile[ax - 1][ay] = EL_EXPANDABLE_STEELWALL_GROWING;
+      Tile[ax - 1][ay] = wall_growing;
       Store[ax - 1][ay] = element;
       GfxDir[ax - 1][ay] = MovDir[ax - 1][ay] = MV_LEFT;
+
       if (IN_SCR_FIELD(SCREENX(ax - 1), SCREENY(ay)))
-	DrawLevelGraphic(ax - 1, ay, IMG_EXPANDABLE_STEELWALL_GROWING_LEFT, 0);
+	DrawLevelGraphic(ax - 1, ay, gfx_wall_growing_left, 0);
+
       new_wall = TRUE;
     }
 
-    if (rechts_frei)
+    if (free_right)
     {
-      Tile[ax + 1][ay] = EL_EXPANDABLE_STEELWALL_GROWING;
+      Tile[ax + 1][ay] = wall_growing;
       Store[ax + 1][ay] = element;
       GfxDir[ax + 1][ay] = MovDir[ax + 1][ay] = MV_RIGHT;
+
       if (IN_SCR_FIELD(SCREENX(ax + 1), SCREENY(ay)))
-	DrawLevelGraphic(ax + 1, ay, IMG_EXPANDABLE_STEELWALL_GROWING_RIGHT, 0);
+	DrawLevelGraphic(ax + 1, ay, gfx_wall_growing_right, 0);
+
       new_wall = TRUE;
     }
   }
 
+  if (element == EL_EXPANDABLE_WALL && (free_left || free_right))
+    TEST_DrawLevelField(ax, ay);
+
   if (!IN_LEV_FIELD(ax, ay - 1) || IS_WALL(Tile[ax][ay - 1]))
-    oben_massiv = TRUE;
+    stop_top = TRUE;
   if (!IN_LEV_FIELD(ax, ay + 1) || IS_WALL(Tile[ax][ay + 1]))
-    unten_massiv = TRUE;
+    stop_bottom = TRUE;
   if (!IN_LEV_FIELD(ax - 1, ay) || IS_WALL(Tile[ax - 1][ay]))
-    links_massiv = TRUE;
+    stop_left = TRUE;
   if (!IN_LEV_FIELD(ax + 1, ay) || IS_WALL(Tile[ax + 1][ay]))
-    rechts_massiv = TRUE;
+    stop_right = TRUE;
 
-  if (((oben_massiv && unten_massiv) ||
-       element == EL_EXPANDABLE_STEELWALL_HORIZONTAL) &&
-      ((links_massiv && rechts_massiv) ||
-       element == EL_EXPANDABLE_STEELWALL_VERTICAL))
-    Tile[ax][ay] = EL_STEELWALL;
+  if (((stop_top && stop_bottom) || stop_horizontal) &&
+      ((stop_left && stop_right) || stop_vertical))
+    Tile[ax][ay] = (is_steelwall ? EL_STEELWALL : EL_WALL);
 
   if (new_wall)
     PlayLevelSoundAction(ax, ay, ACTION_GROWING);
@@ -9951,19 +9954,14 @@ static void CheckForDragon(int x, int y)
 {
   int i, j;
   boolean dragon_found = FALSE;
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
     for (j = 0; j < 4; j++)
     {
-      int xx = x + j * xy[i][0], yy = y + j * xy[i][1];
+      int xx = x + j * xy[i].x;
+      int yy = y + j * xy[i].y;
 
       if (IN_LEV_FIELD(xx, yy) &&
 	  (Tile[xx][yy] == EL_FLAMES || Tile[xx][yy] == EL_DRAGON))
@@ -9982,8 +9980,9 @@ static void CheckForDragon(int x, int y)
     {
       for (j = 0; j < 3; j++)
       {
-  	int xx = x + j * xy[i][0], yy = y + j * xy[i][1];
-  
+	int xx = x + j * xy[i].x;
+	int yy = y + j * xy[i].y;
+
   	if (IN_LEV_FIELD(xx, yy) && Tile[xx][yy] == EL_FLAMES)
   	{
 	  Tile[xx][yy] = EL_EMPTY;
@@ -10013,18 +10012,12 @@ static void InitBuggyBase(int x, int y)
 static void WarnBuggyBase(int x, int y)
 {
   int i;
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
 
     if (IN_LEV_FIELD(xx, yy) && IS_PLAYER(xx, yy))
     {
@@ -10227,7 +10220,7 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
 
 	DisplayGameControlValues();
 
-	if (!TimeLeft && setup.time_limit)
+	if (!TimeLeft && game.time_limit)
 	  for (i = 0; i < MAX_PLAYERS; i++)
 	    KillPlayer(&stored_player[i]);
       }
@@ -10699,17 +10692,26 @@ static void CreateFieldExt(int x, int y, int element, boolean is_change)
 
     if (GFX_CRUMBLED(new_element))
       TEST_DrawLevelFieldCrumbledNeighbours(x, y);
-  }
 
-  // check if element under the player changes from accessible to unaccessible
-  // (needed for special case of dropping element which then changes)
-  // (must be checked after creating new element for walkable group elements)
-  if (IS_PLAYER(x, y) && !player_explosion_protected &&
-      IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
-  {
-    Bang(x, y);
+    if (old_element == EL_EXPLOSION)
+    {
+      Store[x][y] = Store2[x][y] = 0;
 
-    return;
+      // check if new element replaces an exploding player, requiring cleanup
+      if (IS_PLAYER(x, y) && !PLAYERINFO(x, y)->present)
+	StorePlayer[x][y] = 0;
+    }
+
+    // check if element under the player changes from accessible to unaccessible
+    // (needed for special case of dropping element which then changes)
+    // (must be checked after creating new element for walkable group elements)
+    if (IS_PLAYER(x, y) && !player_explosion_protected &&
+	IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
+    {
+      KillPlayer(PLAYERINFO(x, y));
+
+      return;
+    }
   }
 
   // "ChangeCount" not set yet to allow "entered by player" change one time
@@ -10769,6 +10771,8 @@ static boolean ChangeElement(int x, int y, int element, int page)
     change->actual_trigger_side = CH_SIDE_NONE;
     change->actual_trigger_ce_value = 0;
     change->actual_trigger_ce_score = 0;
+    change->actual_trigger_x = -1;
+    change->actual_trigger_y = -1;
   }
 
   // do not change elements more than a specified maximum number of changes
@@ -10777,6 +10781,11 @@ static boolean ChangeElement(int x, int y, int element, int page)
 
   ChangeCount[x][y]++;		// count number of changes in the same frame
 
+  if (ei->has_anim_event)
+    HandleGlobalAnimEventByElementChange(element, page, x, y,
+					 change->actual_trigger_x,
+					 change->actual_trigger_y);
+
   if (change->explode)
   {
     Bang(x, y);
@@ -11011,13 +11020,14 @@ static void HandleElementChange(int x, int y, int page)
 
   if (ChangeDelay[x][y] != 0)		// continue element change
   {
-    if (change->can_change)
-    {
-      int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+    int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
 
-      if (IS_ANIMATED(graphic))
-	DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
+    // also needed if CE can not change, but has CE delay with CE action
+    if (IS_ANIMATED(graphic))
+      DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
 
+    if (change->can_change)
+    {
       if (change->change_function)
 	change->change_function(x, y);
     }
@@ -11104,6 +11114,8 @@ static boolean CheckTriggeredElementChangeExt(int trigger_x, int trigger_y,
 	change->actual_trigger_side = trigger_side;
 	change->actual_trigger_ce_value = CustomValue[trigger_x][trigger_y];
 	change->actual_trigger_ce_score = GET_CE_SCORE(trigger_element);
+	change->actual_trigger_x = trigger_x;
+	change->actual_trigger_y = trigger_y;
 
 	if ((change->can_change && !change_done) || change->has_action)
 	{
@@ -11218,6 +11230,8 @@ static boolean CheckElementChangeExt(int x, int y,
       change->actual_trigger_side = trigger_side;
       change->actual_trigger_ce_value = CustomValue[x][y];
       change->actual_trigger_ce_score = GET_CE_SCORE(trigger_element);
+      change->actual_trigger_x = x;
+      change->actual_trigger_y = y;
 
       // special case: trigger element not at (x,y) position for some events
       if (check_trigger_element)
@@ -11241,6 +11255,8 @@ static boolean CheckElementChangeExt(int x, int y,
 
 	change->actual_trigger_ce_value = CustomValue[xx][yy];
 	change->actual_trigger_ce_score = GET_CE_SCORE(trigger_element);
+	change->actual_trigger_x = xx;
+	change->actual_trigger_y = yy;
       }
 
       if (change->can_change && !change_done)
@@ -11637,18 +11653,18 @@ static void CheckLevelTime_StepCounter(void)
   {
     TimeLeft--;
 
-    if (TimeLeft <= 10 && setup.time_limit && !game.LevelSolved)
+    if (TimeLeft <= 10 && game.time_limit && !game.LevelSolved)
       PlaySound(SND_GAME_RUNNING_OUT_OF_TIME);
 
     game_panel_controls[GAME_PANEL_TIME].value = TimeLeft;
 
     DisplayGameControlValues();
 
-    if (!TimeLeft && setup.time_limit && !game.LevelSolved)
+    if (!TimeLeft && game.time_limit && !game.LevelSolved)
       for (i = 0; i < MAX_PLAYERS; i++)
 	KillPlayer(&stored_player[i]);
   }
-  else if (game.no_time_limit && !game.all_players_gone)
+  else if (game.no_level_time_limit && !game.all_players_gone)
   {
     game_panel_controls[GAME_PANEL_TIME].value = TimePlayed;
 
@@ -11686,7 +11702,7 @@ static void CheckLevelTime(void)
       {
 	TimeLeft--;
 
-	if (TimeLeft <= 10 && setup.time_limit)
+	if (TimeLeft <= 10 && game.time_limit)
 	  PlaySound(SND_GAME_RUNNING_OUT_OF_TIME);
 
 	/* this does not make sense: game_panel_controls[GAME_PANEL_TIME].value
@@ -11694,7 +11710,7 @@ static void CheckLevelTime(void)
 
 	game_panel_controls[GAME_PANEL_TIME].value = TimeLeft;
 
-	if (!TimeLeft && setup.time_limit)
+	if (!TimeLeft && game.time_limit)
 	{
 	  if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 	    game_em.lev->killed_out_of_time = TRUE;
@@ -11703,12 +11719,12 @@ static void CheckLevelTime(void)
 	      KillPlayer(&stored_player[i]);
 	}
       }
-      else if (game.no_time_limit && !game.all_players_gone)
+      else if (game.no_level_time_limit && !game.all_players_gone)
       {
 	game_panel_controls[GAME_PANEL_TIME].value = TimePlayed;
       }
 
-      game_em.lev->time = (game.no_time_limit ? TimePlayed : TimeLeft);
+      game_em.lev->time = (game.no_level_time_limit ? TimePlayed : TimeLeft);
     }
 
     if (tape.recording || tape.playing)
@@ -11770,6 +11786,64 @@ void AdvanceFrameAndPlayerCounters(int player_nr)
   }
 }
 
+void AdvanceFrameCounter(void)
+{
+  FrameCounter++;
+}
+
+void AdvanceGfxFrame(void)
+{
+  int x, y;
+
+  SCAN_PLAYFIELD(x, y)
+  {
+    GfxFrame[x][y]++;
+  }
+}
+
+static void HandleMouseAction(struct MouseActionInfo *mouse_action,
+			      struct MouseActionInfo *mouse_action_last)
+{
+  if (mouse_action->button)
+  {
+    int new_button = (mouse_action->button && mouse_action_last->button == 0);
+    int ch_button = CH_SIDE_FROM_BUTTON(mouse_action->button);
+    int x = mouse_action->lx;
+    int y = mouse_action->ly;
+    int element = Tile[x][y];
+
+    if (new_button)
+    {
+      CheckElementChangeByMouse(x, y, element, CE_CLICKED_BY_MOUSE, ch_button);
+      CheckTriggeredElementChangeByMouse(x, y, element, CE_MOUSE_CLICKED_ON_X,
+					 ch_button);
+    }
+
+    CheckElementChangeByMouse(x, y, element, CE_PRESSED_BY_MOUSE, ch_button);
+    CheckTriggeredElementChangeByMouse(x, y, element, CE_MOUSE_PRESSED_ON_X,
+				       ch_button);
+
+    if (level.use_step_counter)
+    {
+      boolean counted_click = FALSE;
+
+      // element clicked that can change when clicked/pressed
+      if (CAN_CHANGE_OR_HAS_ACTION(element) &&
+	  (HAS_ANY_CHANGE_EVENT(element, CE_CLICKED_BY_MOUSE) ||
+	   HAS_ANY_CHANGE_EVENT(element, CE_PRESSED_BY_MOUSE)))
+	counted_click = TRUE;
+
+      // element clicked that can trigger change when clicked/pressed
+      if (trigger_events[element][CE_MOUSE_CLICKED_ON_X] ||
+	  trigger_events[element][CE_MOUSE_PRESSED_ON_X])
+	counted_click = TRUE;
+
+      if (new_button && counted_click)
+	CheckLevelTime_StepCounter();
+    }
+  }
+}
+
 void StartGameActions(boolean init_network_game, boolean record_tape,
 		      int random_seed)
 {
@@ -11965,7 +12039,7 @@ static void GameActionsExt(void)
     TapeRecordAction(tape_action);
 
   // remember if game was played (especially after tape stopped playing)
-  if (!tape.playing && summarized_player_action)
+  if (!tape.playing && summarized_player_action && !checkGameFailed())
     game.GamePlayed = TRUE;
 
 #if USE_NEW_PLAYER_ASSIGNMENTS
@@ -12088,25 +12162,23 @@ void GameActions(void)
 void GameActions_EM_Main(void)
 {
   byte effective_action[MAX_PLAYERS];
-  boolean warp_mode = (tape.playing && tape.warp_forward && !tape.pausing);
   int i;
 
   for (i = 0; i < MAX_PLAYERS; i++)
     effective_action[i] = stored_player[i].effective_action;
 
-  GameActions_EM(effective_action, warp_mode);
+  GameActions_EM(effective_action);
 }
 
 void GameActions_SP_Main(void)
 {
   byte effective_action[MAX_PLAYERS];
-  boolean warp_mode = (tape.playing && tape.warp_forward && !tape.pausing);
   int i;
 
   for (i = 0; i < MAX_PLAYERS; i++)
     effective_action[i] = stored_player[i].effective_action;
 
-  GameActions_SP(effective_action, warp_mode);
+  GameActions_SP(effective_action);
 
   for (i = 0; i < MAX_PLAYERS; i++)
   {
@@ -12119,9 +12191,9 @@ void GameActions_SP_Main(void)
 
 void GameActions_MM_Main(void)
 {
-  boolean warp_mode = (tape.playing && tape.warp_forward && !tape.pausing);
+  AdvanceGfxFrame();
 
-  GameActions_MM(local_player->effective_mouse_action, warp_mode);
+  GameActions_MM(local_player->effective_mouse_action);
 }
 
 void GameActions_RND_Main(void)
@@ -12185,7 +12257,7 @@ void GameActions_RND(void)
     game.centered_player_nr = game.centered_player_nr_next;
     game.set_centered_player = FALSE;
 
-    DrawRelocateScreen(0, 0, sx, sy, MV_NONE, TRUE, setup.quick_switch);
+    DrawRelocateScreen(0, 0, sx, sy, TRUE, setup.quick_switch);
     DrawGameDoorValues();
   }
 
@@ -12338,45 +12410,7 @@ void GameActions_RND(void)
 #endif
   }
 
-  if (mouse_action.button)
-  {
-    int new_button = (mouse_action.button && mouse_action_last.button == 0);
-    int ch_button = CH_SIDE_FROM_BUTTON(mouse_action.button);
-
-    x = mouse_action.lx;
-    y = mouse_action.ly;
-    element = Tile[x][y];
-
-    if (new_button)
-    {
-      CheckElementChangeByMouse(x, y, element, CE_CLICKED_BY_MOUSE, ch_button);
-      CheckTriggeredElementChangeByMouse(x, y, element, CE_MOUSE_CLICKED_ON_X,
-					 ch_button);
-    }
-
-    CheckElementChangeByMouse(x, y, element, CE_PRESSED_BY_MOUSE, ch_button);
-    CheckTriggeredElementChangeByMouse(x, y, element, CE_MOUSE_PRESSED_ON_X,
-				       ch_button);
-
-    if (level.use_step_counter)
-    {
-      boolean counted_click = FALSE;
-
-      // element clicked that can change when clicked/pressed
-      if (CAN_CHANGE_OR_HAS_ACTION(element) &&
-	  (HAS_ANY_CHANGE_EVENT(element, CE_CLICKED_BY_MOUSE) ||
-	   HAS_ANY_CHANGE_EVENT(element, CE_PRESSED_BY_MOUSE)))
-	counted_click = TRUE;
-
-      // element clicked that can trigger change when clicked/pressed
-      if (trigger_events[element][CE_MOUSE_CLICKED_ON_X] ||
-	  trigger_events[element][CE_MOUSE_PRESSED_ON_X])
-	counted_click = TRUE;
-
-      if (new_button && counted_click)
-	CheckLevelTime_StepCounter();
-    }
-  }
+  HandleMouseAction(&mouse_action, &mouse_action_last);
 
   SCAN_PLAYFIELD(x, y)
   {
@@ -12482,17 +12516,16 @@ void GameActions_RND(void)
       CheckExitSP(x, y);
     else if (element == EL_EXPANDABLE_WALL_GROWING ||
 	     element == EL_EXPANDABLE_STEELWALL_GROWING)
-      MauerWaechst(x, y);
+      WallGrowing(x, y);
     else if (element == EL_EXPANDABLE_WALL ||
 	     element == EL_EXPANDABLE_WALL_HORIZONTAL ||
 	     element == EL_EXPANDABLE_WALL_VERTICAL ||
 	     element == EL_EXPANDABLE_WALL_ANY ||
-	     element == EL_BD_EXPANDABLE_WALL)
-      MauerAbleger(x, y);
-    else if (element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
+	     element == EL_BD_EXPANDABLE_WALL ||
+	     element == EL_EXPANDABLE_STEELWALL_HORIZONTAL ||
 	     element == EL_EXPANDABLE_STEELWALL_VERTICAL ||
 	     element == EL_EXPANDABLE_STEELWALL_ANY)
-      MauerAblegerStahl(x, y);
+      CheckWallGrowing(x, y);
     else if (element == EL_FLAMES)
       CheckForDragon(x, y);
     else if (element == EL_EXPLOSION)
@@ -12501,7 +12534,7 @@ void GameActions_RND(void)
 	     element == EL_DIAGONAL_SHRINKING ||
 	     element == EL_DIAGONAL_GROWING)
     {
-      graphic = el_act_dir2img(GfxElement[x][y], GfxAction[x][y],GfxDir[x][y]);
+      graphic = el_act_dir2img(GfxElement[x][y], GfxAction[x][y], GfxDir[x][y]);
 
       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
     }
@@ -12546,7 +12579,7 @@ void GameActions_RND(void)
       y = RND(lev_fieldy);
       element = Tile[x][y];
 
-      if (!IS_PLAYER(x,y) &&
+      if (!IS_PLAYER(x, y) &&
 	  (element == EL_EMPTY ||
 	   CAN_GROW_INTO(element) ||
 	   element == EL_QUICKSAND_EMPTY ||
@@ -12922,7 +12955,7 @@ boolean MovePlayerOneStep(struct PlayerInfo *player,
       !AllPlayersInSight(player, new_jx, new_jy))
     return MP_NO_ACTION;
 
-  can_move = DigField(player, jx, jy, new_jx, new_jy, real_dx,real_dy, DF_DIG);
+  can_move = DigField(player, jx, jy, new_jx, new_jy, real_dx, real_dy, DF_DIG);
   if (can_move != MP_MOVING)
     return can_move;
 
@@ -13195,7 +13228,7 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
 
   if (mode == SCROLL_INIT)
   {
-    player->actual_frame_counter = FrameCounter;
+    player->actual_frame_counter.count = FrameCounter;
     player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
     if ((player->block_last_field || player->block_delay_adjustment > 0) &&
@@ -13224,7 +13257,7 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
     if (player->MovPos != 0)	// player has not yet reached destination
       return;
   }
-  else if (!FrameReached(&player->actual_frame_counter, 1))
+  else if (!FrameReached(&player->actual_frame_counter))
     return;
 
   if (player->MovPos != 0)
@@ -13292,13 +13325,18 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
 					  CE_PLAYER_LEAVES_X,
 					  player->index_bit, leave_side);
 
-      if (IS_CUSTOM_ELEMENT(new_element))
-	CheckElementChangeByPlayer(jx, jy, new_element, CE_ENTERED_BY_PLAYER,
-				   player->index_bit, enter_side);
+      // needed because pushed element has not yet reached its destination,
+      // so it would trigger a change event at its previous field location
+      if (!player->is_pushing)
+      {
+	if (IS_CUSTOM_ELEMENT(new_element))
+	  CheckElementChangeByPlayer(jx, jy, new_element, CE_ENTERED_BY_PLAYER,
+				     player->index_bit, enter_side);
 
-      CheckTriggeredElementChangeByPlayer(jx, jy, new_element,
-					  CE_PLAYER_ENTERS_X,
-					  player->index_bit, enter_side);
+	CheckTriggeredElementChangeByPlayer(jx, jy, new_element,
+					    CE_PLAYER_ENTERS_X,
+					    player->index_bit, enter_side);
+      }
 
       CheckTriggeredElementChangeBySide(jx, jy, player->initial_element,
 					CE_MOVE_OF_X, move_direction);
@@ -13309,8 +13347,8 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
       TestIfPlayerTouchesBadThing(jx, jy);
       TestIfPlayerTouchesCustomElement(jx, jy);
 
-      /* needed because pushed element has not yet reached its destination,
-	 so it would trigger a change event at its previous field location */
+      // needed because pushed element has not yet reached its destination,
+      // so it would trigger a change event at its previous field location
       if (!player->is_pushing)
 	TestIfElementTouchesCustomElement(jx, jy);	// for empty space
 
@@ -13347,20 +13385,22 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
 
 void ScrollScreen(struct PlayerInfo *player, int mode)
 {
-  static unsigned int screen_frame_counter = 0;
+  static DelayCounter screen_frame_counter = { 0 };
 
   if (mode == SCROLL_INIT)
   {
     // set scrolling step size according to actual player's moving speed
     ScrollStepSize = TILEX / player->move_delay_value;
 
-    screen_frame_counter = FrameCounter;
+    screen_frame_counter.count = FrameCounter;
+    screen_frame_counter.value = 1;
+
     ScreenMovDir = player->MovDir;
     ScreenMovPos = player->MovPos;
     ScreenGfxPos = ScrollStepSize * (ScreenMovPos / ScrollStepSize);
     return;
   }
-  else if (!FrameReached(&screen_frame_counter, 1))
+  else if (!FrameReached(&screen_frame_counter))
     return;
 
   if (ScreenMovPos)
@@ -13387,13 +13427,7 @@ void CheckNextToConditions(int x, int y)
 
 void TestIfPlayerNextToCustomElement(int x, int y)
 {
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
   static int trigger_sides[4][2] =
   {
     // center side       border side
@@ -13414,8 +13448,8 @@ void TestIfPlayerNextToCustomElement(int x, int y)
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
     int border_side = trigger_sides[i][1];
     int border_element;
 
@@ -13445,13 +13479,7 @@ void TestIfPlayerNextToCustomElement(int x, int y)
 
 void TestIfPlayerTouchesCustomElement(int x, int y)
 {
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
   static int trigger_sides[4][2] =
   {
     // center side       border side
@@ -13472,8 +13500,8 @@ void TestIfPlayerTouchesCustomElement(int x, int y)
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
     int center_side = trigger_sides[i][0];
     int border_side = trigger_sides[i][1];
     int border_element;
@@ -13507,8 +13535,9 @@ void TestIfPlayerTouchesCustomElement(int x, int y)
 	   incorrectly give EL_PLAYER_1 for "player->element_nr") */
 	int player_element = PLAYERINFO(x, y)->initial_element;
 
+	// as element "X" is the player here, check opposite (center) side
 	CheckElementChangeBySide(xx, yy, border_element, player_element,
-				 CE_TOUCHING_X, border_side);
+				 CE_TOUCHING_X, center_side);
       }
     }
     else if (IS_PLAYER(xx, yy))		// player found at border element
@@ -13534,8 +13563,9 @@ void TestIfPlayerTouchesCustomElement(int x, int y)
 	   incorrectly give EL_PLAYER_1 for "player->element_nr") */
 	int player_element = PLAYERINFO(xx, yy)->initial_element;
 
+	// as element "X" is the player here, check opposite (border) side
 	CheckElementChangeBySide(x, y, center_element, player_element,
-				 CE_TOUCHING_X, center_side);
+				 CE_TOUCHING_X, border_side);
       }
 
       break;
@@ -13545,13 +13575,7 @@ void TestIfPlayerTouchesCustomElement(int x, int y)
 
 void TestIfElementNextToCustomElement(int x, int y)
 {
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
   static int trigger_sides[4][2] =
   {
     // center side	border side
@@ -13568,8 +13592,8 @@ void TestIfElementNextToCustomElement(int x, int y)
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
     int border_side = trigger_sides[i][1];
     int border_element;
 
@@ -13590,13 +13614,7 @@ void TestIfElementNextToCustomElement(int x, int y)
 
 void TestIfElementTouchesCustomElement(int x, int y)
 {
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
   static int trigger_sides[4][2] =
   {
     // center side	border side
@@ -13619,8 +13637,8 @@ void TestIfElementTouchesCustomElement(int x, int y)
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
     int border_element;
 
     border_element_old[i] = -1;
@@ -13642,8 +13660,8 @@ void TestIfElementTouchesCustomElement(int x, int y)
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
     int center_side = trigger_sides[i][0];
     int border_element = border_element_old[i];
 
@@ -13654,13 +13672,13 @@ void TestIfElementTouchesCustomElement(int x, int y)
     CheckElementChangeBySide(xx, yy, border_element, center_element,
 			     CE_TOUCHING_X, center_side);
 
-    // (center element cannot be player, so we dont have to check this here)
+    // (center element cannot be player, so we don't have to check this here)
   }
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
-    int xx = x + xy[i][0];
-    int yy = y + xy[i][1];
+    int xx = x + xy[i].x;
+    int yy = y + xy[i].y;
     int border_side = trigger_sides[i][1];
     int border_element = border_element_old[i];
 
@@ -13681,6 +13699,7 @@ void TestIfElementTouchesCustomElement(int x, int y)
 	 incorrectly give EL_PLAYER_1 for "player->element_nr") */
       int player_element = PLAYERINFO(xx, yy)->initial_element;
 
+      // as element "X" is the player here, check opposite (border) side
       CheckElementChangeBySide(x, y, center_element, player_element,
 			       CE_TOUCHING_X, border_side);
     }
@@ -13747,13 +13766,7 @@ void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
   int i, kill_x = -1, kill_y = -1;
 
   int bad_element = -1;
-  static int test_xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *test_xy = xy_topdown;
   static int test_dir[4] =
   {
     MV_UP,
@@ -13766,8 +13779,8 @@ void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
   {
     int test_x, test_y, test_move_dir, test_element;
 
-    test_x = good_x + test_xy[i][0];
-    test_y = good_y + test_xy[i][1];
+    test_x = good_x + test_xy[i].x;
+    test_y = good_y + test_xy[i].y;
 
     if (!IN_LEV_FIELD(test_x, test_y))
       continue;
@@ -13812,13 +13825,7 @@ void TestIfBadThingHitsGoodThing(int bad_x, int bad_y, int bad_move_dir)
 {
   int i, kill_x = -1, kill_y = -1;
   int bad_element = Tile[bad_x][bad_y];
-  static int test_xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *test_xy = xy_topdown;
   static int touch_dir[4] =
   {
     MV_LEFT | MV_RIGHT,
@@ -13841,8 +13848,8 @@ void TestIfBadThingHitsGoodThing(int bad_x, int bad_y, int bad_move_dir)
   {
     int test_x, test_y, test_move_dir, test_element;
 
-    test_x = bad_x + test_xy[i][0];
-    test_y = bad_y + test_xy[i][1];
+    test_x = bad_x + test_xy[i].x;
+    test_y = bad_y + test_xy[i].y;
 
     if (!IN_LEV_FIELD(test_x, test_y))
       continue;
@@ -13994,20 +14001,14 @@ void TestIfBadThingTouchesFriend(int x, int y)
 void TestIfBadThingTouchesOtherBadThing(int bad_x, int bad_y)
 {
   int i, kill_x = bad_x, kill_y = bad_y;
-  static int xy[4][2] =
-  {
-    { 0, -1 },
-    { -1, 0 },
-    { +1, 0 },
-    { 0, +1 }
-  };
+  struct XY *xy = xy_topdown;
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
   {
     int x, y, element;
 
-    x = bad_x + xy[i][0];
-    y = bad_y + xy[i][1];
+    x = bad_x + xy[i].x;
+    y = bad_y + xy[i].y;
     if (!IN_LEV_FIELD(x, y))
       continue;
 
@@ -14056,7 +14057,7 @@ void KillPlayer(struct PlayerInfo *player)
   player->killed = TRUE;
 
   // remove accessible field at the player's position
-  Tile[jx][jy] = EL_EMPTY;
+  RemoveField(jx, jy);
 
   // deactivate shield (else Bang()/Explode() would not work right)
   player->shield_normal_time_left = 0;
@@ -14102,7 +14103,6 @@ void BuryPlayer(struct PlayerInfo *player)
     return;
 
   PlayLevelSoundElementAction(jx, jy, player->artwork_element, ACTION_DYING);
-  PlayLevelSound(jx, jy, SND_GAME_LOSING);
 
   RemovePlayer(player);
 
@@ -14281,7 +14281,7 @@ static int DigField(struct PlayerInfo *player,
   if (IS_WALKABLE(old_element) && !ACCESS_FROM(old_element, move_direction))
     return MP_NO_ACTION;	// field has no opening in this direction
 
-  if (IS_PASSABLE(old_element) && !ACCESS_FROM(old_element,opposite_direction))
+  if (IS_PASSABLE(old_element) && !ACCESS_FROM(old_element, opposite_direction))
     return MP_NO_ACTION;	// field has no opening in this direction
 
   if (player_can_move && element == EL_ACID && move_direction == MV_DOWN)
@@ -14519,9 +14519,13 @@ static int DigField(struct PlayerInfo *player,
     }
     else if (element == EL_SHIELD_NORMAL || element == EL_SHIELD_DEADLY)
     {
-      player->shield_normal_time_left += level.shield_normal_time;
+      int shield_time = (element == EL_SHIELD_DEADLY ?
+			 level.shield_deadly_time :
+			 level.shield_normal_time);
+
+      player->shield_normal_time_left += shield_time;
       if (element == EL_SHIELD_DEADLY)
-	player->shield_deadly_time_left += level.shield_deadly_time;
+	player->shield_deadly_time_left += shield_time;
     }
     else if (element == EL_DYNAMITE ||
 	     element == EL_EM_DYNAMITE ||
@@ -14756,7 +14760,7 @@ static int DigField(struct PlayerInfo *player,
 
 	LevelSolved();
 
-	PlayLevelSound(x, y, SND_GAME_SOKOBAN_SOLVING);
+	PlaySound(SND_GAME_SOKOBAN_SOLVING);
       }
     }
     else
@@ -14841,7 +14845,7 @@ static int DigField(struct PlayerInfo *player,
 	     element == EL_DC_SWITCHGATE_SWITCH_UP ||
 	     element == EL_DC_SWITCHGATE_SWITCH_DOWN)
     {
-      ToggleSwitchgateSwitch(x, y);
+      ToggleSwitchgateSwitch();
     }
     else if (element == EL_LIGHT_SWITCH ||
 	     element == EL_LIGHT_SWITCH_ACTIVE)
@@ -14882,7 +14886,7 @@ static int DigField(struct PlayerInfo *player,
       if (level.time > 0 || level.use_time_orb_bug)
       {
 	TimeLeft += level.time_orb_time;
-	game.no_time_limit = FALSE;
+	game.no_level_time_limit = FALSE;
 
 	game_panel_controls[GAME_PANEL_TIME].value = TimeLeft;
 
@@ -15343,10 +15347,12 @@ static void StopLevelSoundActionIfLoop(int x, int y, int action)
 
 static int getLevelMusicNr(void)
 {
+  int level_pos = level_nr - leveldir_current->first_level;
+
   if (levelset.music[level_nr] != MUS_UNDEFINED)
     return levelset.music[level_nr];		// from config file
   else
-    return MAP_NOCONF_MUSIC(level_nr);		// from music dir
+    return MAP_NOCONF_MUSIC(level_pos);		// from music dir
 }
 
 static void FadeLevelSounds(void)
@@ -15734,21 +15740,43 @@ void RequestQuitGame(boolean escape_key_pressed)
 		     "Do you really want to quit the game?");
 }
 
-void RequestRestartGame(char *message)
+static char *getRestartGameMessage(void)
 {
-  game.restart_game_message = NULL;
+  boolean play_again = hasStartedNetworkGame();
+  static char message[MAX_OUTPUT_LINESIZE];
+  char *game_over_text = "Game over!";
+  char *play_again_text = " Play it again?";
 
+  if (level.game_engine_type == GAME_ENGINE_TYPE_MM &&
+      game_mm.game_over_message != NULL)
+    game_over_text = game_mm.game_over_message;
+
+  snprintf(message, MAX_OUTPUT_LINESIZE, "%s%s", game_over_text,
+	   (play_again ? play_again_text : ""));
+
+  return message;
+}
+
+static void RequestRestartGame(void)
+{
+  char *message = getRestartGameMessage();
   boolean has_started_game = hasStartedNetworkGame();
   int request_mode = (has_started_game ? REQ_ASK : REQ_CONFIRM);
+  int door_state = DOOR_CLOSE_1;
 
-  if (Request(message, request_mode | REQ_STAY_CLOSED) && has_started_game)
+  if (Request(message, request_mode | REQ_STAY_OPEN) && has_started_game)
   {
+    CloseDoor(door_state);
+
     StartGameActions(network.enabled, setup.autorecord, level.random_seed);
   }
   else
   {
-    // needed in case of envelope request to close game panel
-    CloseDoor(DOOR_CLOSE_1);
+    // if game was invoked from level editor, also close tape recorder door
+    if (level_editor_test_game)
+      door_state = DOOR_CLOSE_ALL;
+
+    CloseDoor(door_state);
 
     SetGameStatus(GAME_MODE_MAIN);
 
@@ -15756,42 +15784,50 @@ void RequestRestartGame(char *message)
   }
 }
 
-void CheckGameOver(void)
+boolean CheckRestartGame(void)
 {
-  static boolean last_game_over = FALSE;
   static int game_over_delay = 0;
   int game_over_delay_value = 50;
   boolean game_over = checkGameFailed();
 
-  // do not handle game over if request dialog is already active
-  if (game.request_active)
-    return;
-
-  // do not ask to play again if game was never actually played
-  if (!game.GamePlayed)
-    return;
-
   if (!game_over)
   {
-    last_game_over = FALSE;
     game_over_delay = game_over_delay_value;
 
-    return;
+    return FALSE;
   }
 
   if (game_over_delay > 0)
   {
+    if (game_over_delay == game_over_delay_value / 2)
+      PlaySound(SND_GAME_LOSING);
+
     game_over_delay--;
 
-    return;
+    return FALSE;
   }
 
-  if (last_game_over != game_over)
-    game.restart_game_message = (hasStartedNetworkGame() ?
-				 "Game over! Play it again?" :
-				 "Game over!");
+  // do not ask to play again if request dialog is already active
+  if (game.request_active)
+    return FALSE;
+
+  // do not ask to play again if request dialog already handled
+  if (game.RestartGameRequested)
+    return FALSE;
 
-  last_game_over = game_over;
+  // do not ask to play again if game was never actually played
+  if (!game.GamePlayed)
+    return FALSE;
+
+  // do not ask to play again if this was disabled in setup menu
+  if (!setup.ask_on_game_over)
+    return FALSE;
+
+  game.RestartGameRequested = TRUE;
+
+  RequestRestartGame();
+
+  return TRUE;
 }
 
 boolean checkGameSolved(void)
@@ -15975,7 +16011,7 @@ static ListNode *SaveEngineSnapshotBuffers(void)
   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
     SaveEngineSnapshotValues_SP(&buffers);
   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
-    SaveEngineSnapshotValues_MM(&buffers);
+    SaveEngineSnapshotValues_MM();
 
   // save values stored in special snapshot structure
 
@@ -16213,6 +16249,11 @@ static struct
     GAME_CTRL_ID_LOAD,				NULL,
     TRUE, FALSE,				"load game"
   },
+  {
+    IMG_GFX_GAME_BUTTON_RESTART,		&game.button.restart,
+    GAME_CTRL_ID_RESTART,			NULL,
+    TRUE, FALSE,				"restart game"
+  },
   {
     IMG_GFX_GAME_BUTTON_PANEL_STOP,		&game.button.panel_stop,
     GAME_CTRL_ID_PANEL_STOP,			NULL,
@@ -16228,6 +16269,11 @@ static struct
     GAME_CTRL_ID_PANEL_PLAY,			NULL,
     FALSE, FALSE,				"play game"
   },
+  {
+    IMG_GFX_GAME_BUTTON_PANEL_RESTART,		&game.button.panel_restart,
+    GAME_CTRL_ID_PANEL_RESTART,			NULL,
+    FALSE, FALSE,				"restart game"
+  },
   {
     IMG_GFX_GAME_BUTTON_TOUCH_STOP,		&game.button.touch_stop,
     GAME_CTRL_ID_TOUCH_STOP,			NULL,
@@ -16238,6 +16284,11 @@ static struct
     GAME_CTRL_ID_TOUCH_PAUSE,			NULL,
     FALSE, TRUE,				"pause game"
   },
+  {
+    IMG_GFX_GAME_BUTTON_TOUCH_RESTART,		&game.button.touch_restart,
+    GAME_CTRL_ID_TOUCH_RESTART,			NULL,
+    FALSE, TRUE,				"restart game"
+  },
   {
     IMG_GFX_GAME_BUTTON_SOUND_MUSIC,		&game.button.sound_music,
     SOUND_CTRL_ID_MUSIC,			&setup.sound_music,
@@ -16300,6 +16351,10 @@ void CreateGameButtons(void)
     int y = (is_touch_button ? pos->y : GDI_ACTIVE_POS(pos->y));
     int id = i;
 
+    // do not use touch buttons if overlay touch buttons are disabled
+    if (is_touch_button && !setup.touch.overlay_buttons)
+      continue;
+
     if (gfx->bitmap == NULL)
     {
       game_gadget[id] = NULL;
@@ -16313,7 +16368,10 @@ void CreateGameButtons(void)
 	id == GAME_CTRL_ID_PLAY ||
 	id == GAME_CTRL_ID_PANEL_PLAY ||
 	id == GAME_CTRL_ID_SAVE ||
-	id == GAME_CTRL_ID_LOAD)
+	id == GAME_CTRL_ID_LOAD ||
+	id == GAME_CTRL_ID_RESTART ||
+	id == GAME_CTRL_ID_PANEL_RESTART ||
+	id == GAME_CTRL_ID_TOUCH_RESTART)
     {
       button_type = GD_TYPE_NORMAL_BUTTON;
       checked = FALSE;
@@ -16436,6 +16494,10 @@ void ModifyPauseButtons(void)
   };
   int i;
 
+  // do not redraw pause button on closed door (may happen when restarting game)
+  if (!(GetDoorState() & DOOR_OPEN_1))
+    return;
+
   for (i = 0; ids[i] > -1; i++)
     ModifyGadget(game_gadget[ids[i]], GDI_CHECKED, tape.pausing, GDI_END);
 }
@@ -16657,6 +16719,13 @@ static void HandleGameButtonsExt(int id, int button)
       TapeQuickLoad();
       break;
 
+    case GAME_CTRL_ID_RESTART:
+    case GAME_CTRL_ID_PANEL_RESTART:
+    case GAME_CTRL_ID_TOUCH_RESTART:
+      TapeRestartGame();
+
+      break;
+
     case SOUND_CTRL_ID_MUSIC:
     case SOUND_CTRL_ID_PANEL_MUSIC:
       if (setup.sound_music)