X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fgame.c;h=d7fb2368f8536f59501a5dc05cbe86eb6309eda9;hb=f5356588a234e34e349c0b1eba02008655fdee87;hp=ce6ca3ab084668cdfcd63662c5408697270e0fce;hpb=d4665f01d15ba3679f378819710a84d6c2348a9c;p=rocksndiamonds.git

diff --git a/src/game.c b/src/game.c
index ce6ca3ab..d7fb2368 100644
--- a/src/game.c
+++ b/src/game.c
@@ -102,6 +102,7 @@
 
 /* forward declaration for internal use */
 static void CheckGravityMovement(struct PlayerInfo *);
+static void KillHeroUnlessForceField(struct PlayerInfo *);
 
 static void MapGameButtons();
 static void HandleGameButtons(struct GadgetInfo *);
@@ -179,6 +180,50 @@ void GetPlayerConfig()
   InitJoysticks();
 }
 
+static int getBeltNrFromElement(int element)
+{
+  return (element < EL_BELT2_LEFT ? 0 :
+	  element < EL_BELT3_LEFT ? 1 :
+	  element < EL_BELT4_LEFT ? 2 : 3);
+}
+
+static int getBeltNrFromSwitchElement(int element)
+{
+  return (element < EL_BELT2_SWITCH_LEFT ? 0 :
+	  element < EL_BELT3_SWITCH_LEFT ? 1 :
+	  element < EL_BELT4_SWITCH_LEFT ? 2 : 3);
+}
+
+static int getBeltDirNrFromSwitchElement(int element)
+{
+  static int belt_base_element[4] =
+  {
+    EL_BELT1_SWITCH_LEFT,
+    EL_BELT2_SWITCH_LEFT,
+    EL_BELT3_SWITCH_LEFT,
+    EL_BELT4_SWITCH_LEFT
+  };
+
+  int belt_nr = getBeltNrFromSwitchElement(element);
+  int belt_dir_nr = element - belt_base_element[belt_nr];
+
+  return (belt_dir_nr % 3);
+}
+
+static int getBeltDirFromSwitchElement(int element)
+{
+  static int belt_move_dir[3] =
+  {
+    MV_LEFT,
+    MV_NO_MOVING,
+    MV_RIGHT
+  };
+
+  int belt_dir_nr = getBeltDirNrFromSwitchElement(element);
+
+  return belt_move_dir[belt_dir_nr];
+}
+
 static void InitField(int x, int y, boolean init_game)
 {
   switch (Feld[x][y])
@@ -237,36 +282,41 @@ static void InitField(int x, int y, boolean init_game)
 	Feld[x][y] = EL_BADEWANNE5;
       break;
 
-    case EL_KAEFER_R:
-    case EL_KAEFER_O:
-    case EL_KAEFER_L:
-    case EL_KAEFER_U:
+    case EL_KAEFER_RIGHT:
+    case EL_KAEFER_UP:
+    case EL_KAEFER_LEFT:
+    case EL_KAEFER_DOWN:
     case EL_KAEFER:
-    case EL_FLIEGER_R:
-    case EL_FLIEGER_O:
-    case EL_FLIEGER_L:
-    case EL_FLIEGER_U:
+    case EL_FLIEGER_RIGHT:
+    case EL_FLIEGER_UP:
+    case EL_FLIEGER_LEFT:
+    case EL_FLIEGER_DOWN:
     case EL_FLIEGER:
-    case EL_BUTTERFLY_R:
-    case EL_BUTTERFLY_O:
-    case EL_BUTTERFLY_L:
-    case EL_BUTTERFLY_U:
+    case EL_BUTTERFLY_RIGHT:
+    case EL_BUTTERFLY_UP:
+    case EL_BUTTERFLY_LEFT:
+    case EL_BUTTERFLY_DOWN:
     case EL_BUTTERFLY:
-    case EL_FIREFLY_R:
-    case EL_FIREFLY_O:
-    case EL_FIREFLY_L:
-    case EL_FIREFLY_U:
+    case EL_FIREFLY_RIGHT:
+    case EL_FIREFLY_UP:
+    case EL_FIREFLY_LEFT:
+    case EL_FIREFLY_DOWN:
     case EL_FIREFLY:
-    case EL_PACMAN_R:
-    case EL_PACMAN_O:
-    case EL_PACMAN_L:
-    case EL_PACMAN_U:
+    case EL_PACMAN_RIGHT:
+    case EL_PACMAN_UP:
+    case EL_PACMAN_LEFT:
+    case EL_PACMAN_DOWN:
     case EL_MAMPFER:
     case EL_MAMPFER2:
     case EL_ROBOT:
     case EL_PACMAN:
     case EL_SP_SNIKSNAK:
     case EL_SP_ELECTRON:
+    case EL_MOLE_LEFT:
+    case EL_MOLE_RIGHT:
+    case EL_MOLE_UP:
+    case EL_MOLE_DOWN:
+    case EL_MOLE:
       InitMovDir(x, y);
       break;
 
@@ -295,7 +345,6 @@ static void InitField(int x, int y, boolean init_game)
       local_player->sokobanfields_still_needed++;
       break;
 
-    case EL_MAULWURF:
     case EL_PINGUIN:
       local_player->friends_still_needed++;
       break;
@@ -322,6 +371,46 @@ static void InitField(int x, int y, boolean init_game)
       Feld[x][y] = EL_EM_KEY_4;
       break;
 
+    case EL_BELT1_SWITCH_LEFT:
+    case EL_BELT1_SWITCH_MIDDLE:
+    case EL_BELT1_SWITCH_RIGHT:
+    case EL_BELT2_SWITCH_LEFT:
+    case EL_BELT2_SWITCH_MIDDLE:
+    case EL_BELT2_SWITCH_RIGHT:
+    case EL_BELT3_SWITCH_LEFT:
+    case EL_BELT3_SWITCH_MIDDLE:
+    case EL_BELT3_SWITCH_RIGHT:
+    case EL_BELT4_SWITCH_LEFT:
+    case EL_BELT4_SWITCH_MIDDLE:
+    case EL_BELT4_SWITCH_RIGHT:
+      if (init_game)
+      {
+	int belt_nr = getBeltNrFromSwitchElement(Feld[x][y]);
+	int belt_dir = getBeltDirFromSwitchElement(Feld[x][y]);
+	int belt_dir_nr = getBeltDirNrFromSwitchElement(Feld[x][y]);
+
+	if (game.belt_dir_nr[belt_nr] == 3)	/* initial value */
+	{
+	  game.belt_dir[belt_nr] = belt_dir;
+	  game.belt_dir_nr[belt_nr] = belt_dir_nr;
+	}
+	else	/* more than one switch -- set it like the first switch */
+	{
+	  Feld[x][y] = Feld[x][y] - belt_dir_nr + game.belt_dir_nr[belt_nr];
+	}
+      }
+      break;
+
+    case EL_SWITCHGATE_SWITCH_2:	/* always start with same switch pos */
+      if (init_game)
+	Feld[x][y] = EL_SWITCHGATE_SWITCH_1;
+      break;
+
+    case EL_LIGHT_SWITCH_ON:
+      if (init_game)
+	game.light_time_left = 10 * FRAMES_PER_SECOND;
+      break;
+
     default:
       break;
   }
@@ -391,6 +480,9 @@ void InitGame()
     player->last_jx = player->last_jy = 0;
     player->jx = player->jy = 0;
 
+    player->force_field_passive_time_left = 0;
+    player->force_field_active_time_left = 0;
+
     DigField(player, 0, 0, 0, 0, DF_NO_PUSH);
     SnapField(player, 0, 0);
 
@@ -423,8 +515,13 @@ void InitGame()
   AllPlayersGone = FALSE;
   game.magic_wall_active = FALSE;
   game.magic_wall_time_left = 0;
+  game.switchgate_pos = 0;
+  game.light_time_left = 0;
   for (i=0; i<4; i++)
+  {
     game.belt_dir[i] = MV_NO_MOVING;
+    game.belt_dir_nr[i] = 3;		/* not moving, next moving left */
+  }
 
   for (i=0; i<MAX_NUM_AMOEBA; i++)
     AmoebaCnt[i] = AmoebaCnt2[i] = 0;
@@ -458,6 +555,11 @@ void InitGame()
     }
   }
 
+  /* correct non-moving belts to start moving left */
+  for (i=0; i<4; i++)
+    if (game.belt_dir[i] == MV_NO_MOVING)
+      game.belt_dir_nr[i] = 3;		/* not moving, next moving left */
+
   /* check if any connected player was not found in playfield */
   for (i=0; i<MAX_PLAYERS; i++)
   {
@@ -662,52 +764,53 @@ void InitMovDir(int x, int y)
     {  0, -1 },
     { -1,  0 }
   };
-  static int direction[2][4] =
+  static int direction[3][4] =
   {
     { MV_RIGHT, MV_UP,   MV_LEFT,  MV_DOWN },
-    { MV_LEFT,  MV_DOWN, MV_RIGHT, MV_UP }
+    { MV_LEFT,  MV_DOWN, MV_RIGHT, MV_UP },
+    { MV_LEFT,  MV_RIGHT, MV_UP, MV_DOWN }
   };
 
   switch(element)
   {
-    case EL_KAEFER_R:
-    case EL_KAEFER_O:
-    case EL_KAEFER_L:
-    case EL_KAEFER_U:
+    case EL_KAEFER_RIGHT:
+    case EL_KAEFER_UP:
+    case EL_KAEFER_LEFT:
+    case EL_KAEFER_DOWN:
       Feld[x][y] = EL_KAEFER;
-      MovDir[x][y] = direction[0][element - EL_KAEFER_R];
+      MovDir[x][y] = direction[0][element - EL_KAEFER_RIGHT];
       break;
 
-    case EL_FLIEGER_R:
-    case EL_FLIEGER_O:
-    case EL_FLIEGER_L:
-    case EL_FLIEGER_U:
+    case EL_FLIEGER_RIGHT:
+    case EL_FLIEGER_UP:
+    case EL_FLIEGER_LEFT:
+    case EL_FLIEGER_DOWN:
       Feld[x][y] = EL_FLIEGER;
-      MovDir[x][y] = direction[0][element - EL_FLIEGER_R];
+      MovDir[x][y] = direction[0][element - EL_FLIEGER_RIGHT];
       break;
 
-    case EL_BUTTERFLY_R:
-    case EL_BUTTERFLY_O:
-    case EL_BUTTERFLY_L:
-    case EL_BUTTERFLY_U:
+    case EL_BUTTERFLY_RIGHT:
+    case EL_BUTTERFLY_UP:
+    case EL_BUTTERFLY_LEFT:
+    case EL_BUTTERFLY_DOWN:
       Feld[x][y] = EL_BUTTERFLY;
-      MovDir[x][y] = direction[0][element - EL_BUTTERFLY_R];
+      MovDir[x][y] = direction[0][element - EL_BUTTERFLY_RIGHT];
       break;
 
-    case EL_FIREFLY_R:
-    case EL_FIREFLY_O:
-    case EL_FIREFLY_L:
-    case EL_FIREFLY_U:
+    case EL_FIREFLY_RIGHT:
+    case EL_FIREFLY_UP:
+    case EL_FIREFLY_LEFT:
+    case EL_FIREFLY_DOWN:
       Feld[x][y] = EL_FIREFLY;
-      MovDir[x][y] = direction[0][element - EL_FIREFLY_R];
+      MovDir[x][y] = direction[0][element - EL_FIREFLY_RIGHT];
       break;
 
-    case EL_PACMAN_R:
-    case EL_PACMAN_O:
-    case EL_PACMAN_L:
-    case EL_PACMAN_U:
+    case EL_PACMAN_RIGHT:
+    case EL_PACMAN_UP:
+    case EL_PACMAN_LEFT:
+    case EL_PACMAN_DOWN:
       Feld[x][y] = EL_PACMAN;
-      MovDir[x][y] = direction[0][element - EL_PACMAN_R];
+      MovDir[x][y] = direction[0][element - EL_PACMAN_RIGHT];
       break;
 
     case EL_SP_SNIKSNAK:
@@ -718,6 +821,14 @@ void InitMovDir(int x, int y)
       MovDir[x][y] = MV_LEFT;
       break;
 
+    case EL_MOLE_LEFT:
+    case EL_MOLE_RIGHT:
+    case EL_MOLE_UP:
+    case EL_MOLE_DOWN:
+      Feld[x][y] = EL_MOLE;
+      MovDir[x][y] = direction[2][element - EL_MOLE_LEFT];
+      break;
+
     default:
       MovDir[x][y] = 1 << RND(4);
       if (element != EL_KAEFER &&
@@ -1146,10 +1257,22 @@ void Explode(int ex, int ey, int phase, int mode)
       if (IS_MASSIVE(element) || element == EL_BURNING)
 	continue;
 
+      if (IS_PLAYER(x, y) && FORCE_FIELD_ON(PLAYERINFO(x, y)))
+      {
+	if (IS_ACTIVE_BOMB(element))
+	{
+	  /* re-activate things under the bomb like gate or penguin */
+	  Feld[x][y] = (Store[x][y] ? Store[x][y] : EL_LEERRAUM);
+	  Store[x][y] = 0;
+	}
+
+	continue;
+      }
+
       if (element == EL_EXPLODING)
 	element = Store2[x][y];
 
-      if (IS_PLAYER(ex, ey))
+      if (IS_PLAYER(ex, ey) && !FORCE_FIELD_ON(PLAYERINFO(ex, ey)))
       {
 	switch(StorePlayer[ex][ey])
 	{
@@ -1171,7 +1294,7 @@ void Explode(int ex, int ey, int phase, int mode)
 	if (game.emulation == EMU_SUPAPLEX)
 	  Store[x][y] = EL_LEERRAUM;
       }
-      else if (center_element == EL_MAULWURF)
+      else if (center_element == EL_MOLE)
 	Store[x][y] = EL_EDELSTEIN_ROT;
       else if (center_element == EL_PINGUIN)
 	Store[x][y] = EL_EDELSTEIN_LILA;
@@ -1250,7 +1373,7 @@ void Explode(int ex, int ey, int phase, int mode)
     int element = Store2[x][y];
 
     if (IS_PLAYER(x, y))
-      KillHero(PLAYERINFO(x, y));
+      KillHeroUnlessForceField(PLAYERINFO(x, y));
     else if (IS_EXPLOSIVE(element))
     {
       Feld[x][y] = Store2[x][y];
@@ -1350,8 +1473,10 @@ void Bang(int x, int y)
   else
     PlaySoundLevel(x, y, SND_ROAAAR);
 
+#if 0
   if (IS_PLAYER(x, y))	/* remove objects that might cause smaller explosion */
     element = EL_LEERRAUM;
+#endif
 
   switch(element)
   {
@@ -1363,6 +1488,7 @@ void Bang(int x, int y)
     case EL_MAMPFER2:
     case EL_ROBOT:
     case EL_PACMAN:
+    case EL_MOLE:
       RaiseScoreElement(element);
       Explode(x, y, EX_PHASE_START, EX_NORMAL);
       break;
@@ -1375,11 +1501,13 @@ void Bang(int x, int y)
     case EL_DYNABOMB_XL:
       DynaExplode(x, y);
       break;
-    case EL_MAULWURF:
     case EL_PINGUIN:
     case EL_BIRNE_AUS:
     case EL_BIRNE_EIN:
-      Explode(x, y, EX_PHASE_START, EX_CENTER);
+      if (IS_PLAYER(x, y))
+	Explode(x, y, EX_PHASE_START, EX_NORMAL);
+      else
+	Explode(x, y, EX_PHASE_START, EX_CENTER);
       break;
     default:
       Explode(x, y, EX_PHASE_START, EX_NORMAL);
@@ -1429,6 +1557,134 @@ void Blurb(int x, int y)
   }
 }
 
+static void ToggleBeltSwitch(int x, int y)
+{
+  static int belt_base_element[4] =
+  {
+    EL_BELT1_SWITCH_LEFT,
+    EL_BELT2_SWITCH_LEFT,
+    EL_BELT3_SWITCH_LEFT,
+    EL_BELT4_SWITCH_LEFT
+  };
+  static int belt_move_dir[4] =
+  {
+    MV_LEFT,
+    MV_NO_MOVING,
+    MV_RIGHT,
+    MV_NO_MOVING,
+  };
+
+  int element = Feld[x][y];
+  int belt_nr = getBeltNrFromSwitchElement(element);
+  int belt_dir_nr = (game.belt_dir_nr[belt_nr] + 1) % 4;
+  int belt_dir = belt_move_dir[belt_dir_nr];
+  int xx, yy;
+
+  if (!IS_BELT_SWITCH(element))
+    return;
+
+  game.belt_dir_nr[belt_nr] = belt_dir_nr;
+  game.belt_dir[belt_nr] = belt_dir;
+
+  if (belt_dir_nr == 3)
+    belt_dir_nr = 1;
+
+  for (yy=0; yy<lev_fieldy; yy++)
+  {
+    for (xx=0; xx<lev_fieldx; xx++)
+    {
+      int element = Feld[xx][yy];
+
+      if (IS_BELT_SWITCH(element))
+      {
+	int e_belt_nr = getBeltNrFromSwitchElement(element);
+
+	if (e_belt_nr == belt_nr)
+	{
+	  Feld[xx][yy] = belt_base_element[belt_nr] + belt_dir_nr;
+	  DrawLevelField(xx, yy);
+	}
+      }
+      else if (belt_dir == MV_NO_MOVING && IS_BELT(element))
+      {
+	int e_belt_nr = getBeltNrFromElement(element);
+
+	if (e_belt_nr == belt_nr)
+	  DrawLevelField(xx, yy);    /* set belt to parking position */
+      }
+    }
+  }
+}
+
+static void ToggleSwitchgateSwitch(int x, int y)
+{
+  int xx, yy;
+
+  game.switchgate_pos = !game.switchgate_pos;
+
+  for (yy=0; yy<lev_fieldy; yy++)
+  {
+    for (xx=0; xx<lev_fieldx; xx++)
+    {
+      int element = Feld[xx][yy];
+
+      if (element == EL_SWITCHGATE_SWITCH_1 ||
+	  element == EL_SWITCHGATE_SWITCH_2)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_SWITCH_1 + game.switchgate_pos;
+	DrawLevelField(xx, yy);
+      }
+      else if (element == EL_SWITCHGATE_OPEN ||
+	       element == EL_SWITCHGATE_OPENING)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_CLOSING;
+	PlaySoundLevel(xx, yy, SND_OEFFNEN);
+      }
+      else if (element == EL_SWITCHGATE_CLOSED ||
+	       element == EL_SWITCHGATE_CLOSING)
+      {
+	Feld[xx][yy] = EL_SWITCHGATE_OPENING;
+	PlaySoundLevel(xx, yy, SND_OEFFNEN);
+      }
+    }
+  }
+}
+
+static void ToggleLightSwitch(int x, int y)
+{
+  int element = Feld[x][y];
+  int xx, yy;
+
+  game.light_time_left =
+    (element == EL_LIGHT_SWITCH_OFF ? 10 * FRAMES_PER_SECOND : 0);
+
+  for (yy=0; yy<lev_fieldy; yy++)
+  {
+    for (xx=0; xx<lev_fieldx; xx++)
+    {
+      int element = Feld[xx][yy];
+
+      if (element == EL_LIGHT_SWITCH_OFF &&
+	  game.light_time_left > 0)
+      {
+	Feld[xx][yy] = EL_LIGHT_SWITCH_ON;
+	DrawLevelField(xx, yy);
+      }
+      else if (element == EL_LIGHT_SWITCH_ON &&
+	       game.light_time_left == 0)
+      {
+	Feld[xx][yy] = EL_LIGHT_SWITCH_OFF;
+	DrawLevelField(xx, yy);
+      }
+
+      if (element == EL_INVISIBLE_STEEL ||
+	  element == EL_UNSICHTBAR ||
+	  element == EL_SAND_INVISIBLE)
+	DrawLevelField(xx, yy);
+    }
+  }
+}
+
 void Impact(int x, int y)
 {
   boolean lastline = (y == lev_fieldy-1);
@@ -1464,8 +1720,8 @@ void Impact(int x, int y)
   if (element == EL_TROPFEN && (lastline || object_hit))	/* acid drop */
   {
     if (object_hit && IS_PLAYER(x, y+1))
-      KillHero(PLAYERINFO(x, y+1));
-    else if (object_hit && (smashed == EL_MAULWURF || smashed == EL_PINGUIN))
+      KillHeroUnlessForceField(PLAYERINFO(x, y+1));
+    else if (object_hit && smashed == EL_PINGUIN)
       Bang(x, y+1);
     else
     {
@@ -1497,10 +1753,10 @@ void Impact(int x, int y)
 
     if (IS_PLAYER(x, y+1))
     {
-      KillHero(PLAYERINFO(x, y+1));
+      KillHeroUnlessForceField(PLAYERINFO(x, y+1));
       return;
     }
-    else if (smashed == EL_MAULWURF || smashed == EL_PINGUIN)
+    else if (smashed == EL_PINGUIN)
     {
       Bang(x, y+1);
       return;
@@ -1517,7 +1773,8 @@ void Impact(int x, int y)
     {
       if (IS_ENEMY(smashed) ||
 	  smashed == EL_BOMBE || smashed == EL_SP_DISK_ORANGE ||
-	  smashed == EL_SONDE || smashed == EL_SCHWEIN || smashed == EL_DRACHE)
+	  smashed == EL_SONDE || smashed == EL_SCHWEIN ||
+	  smashed == EL_DRACHE || smashed == EL_MOLE)
       {
 	Bang(x, y+1);
 	return;
@@ -1542,6 +1799,20 @@ void Impact(int x, int y)
 	  PlaySoundLevel(x, y, SND_QUIRK);
 	  return;
 	}
+	else if (IS_BELT_SWITCH(smashed))
+	{
+	  ToggleBeltSwitch(x, y+1);
+	}
+	else if (smashed == EL_SWITCHGATE_SWITCH_1 ||
+		 smashed == EL_SWITCHGATE_SWITCH_2)
+	{
+	  ToggleSwitchgateSwitch(x, y+1);
+	}
+	else if (smashed == EL_LIGHT_SWITCH_OFF ||
+		 smashed == EL_LIGHT_SWITCH_ON)
+	{
+	  ToggleLightSwitch(x, y+1);
+	}
       }
     }
   }
@@ -1599,7 +1870,7 @@ void Impact(int x, int y)
         break;
     }
 
-    if (sound>=0)
+    if (sound >= 0)
       PlaySoundLevel(x, y, sound);
   }
 }
@@ -1653,10 +1924,10 @@ void TurnRound(int x, int y)
     TestIfBadThingHitsOtherBadThing(x, y);
 
     if (IN_LEV_FIELD(right_x, right_y) &&
-	IS_FREE_OR_PLAYER(right_x, right_y))
+	IS_FREE(right_x, right_y))
       MovDir[x][y] = right_dir;
     else if (!IN_LEV_FIELD(move_x, move_y) ||
-	     !IS_FREE_OR_PLAYER(move_x, move_y))
+	     !IS_FREE(move_x, move_y))
       MovDir[x][y] = left_dir;
 
     if (element == EL_KAEFER && MovDir[x][y] != old_move_dir)
@@ -1670,10 +1941,10 @@ void TurnRound(int x, int y)
     TestIfBadThingHitsOtherBadThing(x, y);
 
     if (IN_LEV_FIELD(left_x, left_y) &&
-	IS_FREE_OR_PLAYER(left_x, left_y))
+	IS_FREE(left_x, left_y))
       MovDir[x][y] = left_dir;
     else if (!IN_LEV_FIELD(move_x, move_y) ||
-	     !IS_FREE_OR_PLAYER(move_x, move_y))
+	     !IS_FREE(move_x, move_y))
       MovDir[x][y] = right_dir;
 
     if ((element == EL_FLIEGER ||
@@ -1856,8 +2127,36 @@ void TurnRound(int x, int y)
 
     MovDelay[x][y] = 0;
   }
-  else if (element == EL_ROBOT || element == EL_SONDE ||
-	   element == EL_MAULWURF || element == EL_PINGUIN)
+  else if (element == EL_MOLE)
+  {
+    boolean can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
+
+    if (IN_LEV_FIELD(move_x, move_y) &&
+	(IS_FREE(move_x, move_y) || IS_AMOEBOID(Feld[move_x][move_y]) ||
+	 Feld[move_x][move_y] == EL_DEAMOEBING))
+      can_move_on = TRUE;
+
+    if (!can_move_on)
+    {
+      if (IN_LEV_FIELD(left_x, left_y) &&
+	  (IS_FREE(left_x, left_y) || IS_AMOEBOID(Feld[left_x][left_y])))
+	can_turn_left = TRUE;
+      if (IN_LEV_FIELD(right_x, right_y) &&
+	  (IS_FREE(right_x, right_y) || IS_AMOEBOID(Feld[right_x][right_y])))
+	can_turn_right = TRUE;
+
+      if (can_turn_left && can_turn_right)
+	MovDir[x][y] = (RND(2) ? left_dir : right_dir);
+      else if (can_turn_left)
+	MovDir[x][y] = left_dir;
+      else
+	MovDir[x][y] = right_dir;
+    }
+
+    if (MovDir[x][y] != old_move_dir)
+      MovDelay[x][y] = 9;
+  }
+  else if (element == EL_ROBOT || element == EL_SONDE || element == EL_PINGUIN)
   {
     int attr_x = -1, attr_y = -1;
 
@@ -1892,7 +2191,7 @@ void TurnRound(int x, int y)
       attr_y = ZY;
     }
 
-    if (element == EL_MAULWURF || element == EL_PINGUIN)
+    if (element == EL_PINGUIN)
     {
       int i;
       static int xy[4][2] =
@@ -1958,7 +2257,7 @@ void TurnRound(int x, int y)
 	if (IN_LEV_FIELD(newx, newy) &&
 	    (IS_FREE(newx, newy) ||
 	     Feld[newx][newy] == EL_SALZSAEURE ||
-	     ((element == EL_MAULWURF || element == EL_PINGUIN) &&
+	     (element == EL_PINGUIN &&
 	      (Feld[newx][newy] == EL_AUSGANG_AUF ||
 	       IS_MAMPF3(Feld[newx][newy])))))
 	  return;
@@ -1970,7 +2269,7 @@ void TurnRound(int x, int y)
 	if (IN_LEV_FIELD(newx, newy) &&
 	    (IS_FREE(newx, newy) ||
 	     Feld[newx][newy] == EL_SALZSAEURE ||
-	     ((element == EL_MAULWURF || element == EL_PINGUIN) &&
+	     (element == EL_PINGUIN &&
 	      (Feld[newx][newy] == EL_AUSGANG_AUF ||
 	       IS_MAMPF3(Feld[newx][newy])))))
 	  return;
@@ -2145,6 +2444,17 @@ void StartMoving(int x, int y)
 	InitMovingField(x, y, left ? MV_LEFT : MV_RIGHT);
       }
     }
+    else if (IS_BELT(Feld[x][y+1]))
+    {
+      boolean left_is_free  = (x>0 && IS_FREE(x-1, y));
+      boolean right_is_free = (x<lev_fieldx-1 && IS_FREE(x+1, y));
+      int belt_nr = getBeltNrFromElement(Feld[x][y+1]);
+      int belt_dir = game.belt_dir[belt_nr];
+
+      if ((belt_dir == MV_LEFT  && left_is_free) ||
+	  (belt_dir == MV_RIGHT && right_is_free))
+	InitMovingField(x, y, belt_dir);
+    }
   }
   else if (CAN_MOVE(element))
   {
@@ -2161,9 +2471,11 @@ void StartMoving(int x, int y)
       if (element!=EL_MAMPFER && element!=EL_MAMPFER2 && element!=EL_PACMAN)
       {
 	TurnRound(x, y);
-	if (MovDelay[x][y] && (element == EL_KAEFER || element == EL_FLIEGER ||
+	if (MovDelay[x][y] && (element == EL_KAEFER ||
+			       element == EL_FLIEGER ||
 			       element == EL_SP_SNIKSNAK ||
-			       element == EL_SP_ELECTRON))
+			       element == EL_SP_ELECTRON ||
+			       element == EL_MOLE))
 	  DrawLevelField(x, y);
       }
     }
@@ -2249,14 +2561,22 @@ void StartMoving(int x, int y)
 
     Moving2Blocked(x, y, &newx, &newy);	/* get next screen position */
 
-    if (IS_ENEMY(element) && IS_PLAYER(newx, newy))
+    if (IS_ENEMY(element) && IS_PLAYER(newx, newy) &&
+	!FORCE_FIELD_ON(PLAYERINFO(newx, newy)))
     {
+
+#if 1
+      TestIfBadThingHitsHero(x, y);
+      return;
+#else
       /* enemy got the player */
       MovDir[x][y] = 0;
       KillHero(PLAYERINFO(newx, newy));
       return;
+#endif
+
     }
-    else if ((element == EL_MAULWURF || element == EL_PINGUIN ||
+    else if ((element == EL_PINGUIN ||
 	      element == EL_ROBOT || element == EL_SONDE) &&
 	     IN_LEV_FIELD(newx, newy) &&
 	     MovDir[x][y] == MV_DOWN && Feld[newx][newy] == EL_SALZSAEURE)
@@ -2264,8 +2584,7 @@ void StartMoving(int x, int y)
       Blurb(x, y);
       Store[x][y] = EL_SALZSAEURE;
     }
-    else if ((element == EL_MAULWURF || element == EL_PINGUIN) &&
-	     IN_LEV_FIELD(newx, newy))
+    else if (element == EL_PINGUIN && IN_LEV_FIELD(newx, newy))
     {
       if (Feld[newx][newy] == EL_AUSGANG_AUF)
       {
@@ -2390,8 +2709,8 @@ void StartMoving(int x, int y)
 	DrawLevelField(newx, newy);
       }
     }
-    else if (element == EL_PACMAN && IN_LEV_FIELD(newx, newy) &&
-	     IS_AMOEBOID(Feld[newx][newy]))
+    else if ((element == EL_PACMAN || element == EL_MOLE)
+	     && IN_LEV_FIELD(newx, newy) && IS_AMOEBOID(Feld[newx][newy]))
     {
       if (AmoebaNr[newx][newy])
       {
@@ -2401,8 +2720,24 @@ void StartMoving(int x, int y)
 	  AmoebaCnt[AmoebaNr[newx][newy]]--;
       }
 
-      Feld[newx][newy] = EL_LEERRAUM;
-      DrawLevelField(newx, newy);
+      if (element == EL_MOLE)
+      {
+	Feld[newx][newy] = EL_DEAMOEBING;
+	MovDelay[newx][newy] = 0;	/* start amoeba shrinking delay */
+	return;				/* wait for shrinking amoeba */
+      }
+      else	/* element == EL_PACMAN */
+      {
+	Feld[newx][newy] = EL_LEERRAUM;
+	DrawLevelField(newx, newy);
+      }
+    }
+    else if (element == EL_MOLE && IN_LEV_FIELD(newx, newy) &&
+	     (Feld[newx][newy] == EL_DEAMOEBING ||
+	      (Feld[newx][newy] == EL_LEERRAUM && Stop[newx][newy])))
+    {
+      /* wait for shrinking amoeba to completely disappear */
+      return;
     }
     else if (!IN_LEV_FIELD(newx, newy) || !IS_FREE(newx, newy))
     {
@@ -2411,7 +2746,7 @@ void StartMoving(int x, int y)
       TurnRound(x, y);
 
       if (element == EL_KAEFER || element == EL_FLIEGER ||
-	  element == EL_SP_SNIKSNAK)
+	  element == EL_SP_SNIKSNAK || element == EL_MOLE)
 	DrawLevelField(x, y);
       else if (element == EL_BUTTERFLY || element == EL_FIREFLY)
 	DrawGraphicAnimation(x, y, el2gfx(element), 2, 4, ANIM_NORMAL);
@@ -2441,12 +2776,16 @@ void ContinueMoving(int x, int y)
   int dy = (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
   int horiz_move = (dx!=0);
   int newx = x + dx, newy = y + dy;
-  int step = (horiz_move ? dx : dy) * TILEX/8;
+  int step = (horiz_move ? dx : dy) * TILEX / 8;
 
   if (element == EL_TROPFEN)
-    step/=2;
+    step /= 2;
   else if (Store[x][y] == EL_MORAST_VOLL || Store[x][y] == EL_MORAST_LEER)
-    step/=4;
+    step /= 4;
+  else if (CAN_FALL(element) && horiz_move &&
+	   y < lev_fieldy-1 && IS_BELT(Feld[x][y+1]))
+    step /= 2;
+
 #if OLD_GAME_BEHAVIOUR
   else if (CAN_FALL(element) && horiz_move && !IS_SP_ELEMENT(element))
     step*=2;
@@ -2459,6 +2798,32 @@ void ContinueMoving(int x, int y)
     Feld[x][y] = EL_LEERRAUM;
     Feld[newx][newy] = element;
 
+    if (element == EL_MOLE)
+    {
+      int i;
+      static int xy[4][2] =
+      {
+	{ 0, -1 },
+	{ -1, 0 },
+	{ +1, 0 },
+	{ 0, +1 }
+      };
+
+      Feld[x][y] = EL_ERDREICH;
+      DrawLevelField(x, y);
+
+      for(i=0; i<4; i++)
+      {
+	int xx, yy;
+
+	xx = x + xy[i][0];
+	yy = y + xy[i][1];
+
+	if (IN_LEV_FIELD(xx, yy) && Feld[xx][yy] == EL_ERDREICH)
+	  DrawLevelField(xx, yy);	/* for "ErdreichAnbroeckeln()" */
+      }
+    }
+
     if (Store[x][y] == EL_MORAST_VOLL)
     {
       Store[x][y] = 0;
@@ -2734,6 +3099,40 @@ void AmoebeWaechst(int x, int y)
   }
 }
 
+void AmoebeSchrumpft(int x, int y)
+{
+  static unsigned long sound_delay = 0;
+  static unsigned long sound_delay_value = 0;
+
+  if (!MovDelay[x][y])		/* start new shrinking cycle */
+  {
+    MovDelay[x][y] = 7;
+
+    if (DelayReached(&sound_delay, sound_delay_value))
+    {
+      PlaySoundLevel(x, y, SND_BLURB);
+      sound_delay_value = 30;
+    }
+  }
+
+  if (MovDelay[x][y])		/* wait some time before shrinking */
+  {
+    MovDelay[x][y]--;
+    if (MovDelay[x][y]/2 && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_AMOEBING + MovDelay[x][y]/2);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_LEERRAUM;
+      DrawLevelField(x, y);
+
+      /* don't let mole enter this field in this cycle;
+	 (give priority to objects falling to this field from above) */
+      Stop[x][y] = TRUE;
+    }
+  }
+}
+
 void AmoebeAbleger(int ax, int ay)
 {
   int i;
@@ -3074,6 +3473,54 @@ void AusgangstuerBlinken(int x, int y)
   DrawGraphicAnimation(x, y, GFX_AUSGANG_AUF, 4, 4, ANIM_OSCILLATE);
 }
 
+void OpenSwitchgate(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 5 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    int phase;
+
+    MovDelay[x][y]--;
+    phase = MovDelay[x][y] / delay;
+    if (!(MovDelay[x][y] % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_SWITCHGATE_OPEN - phase);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_SWITCHGATE_OPEN;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
+void CloseSwitchgate(int x, int y)
+{
+  int delay = 6;
+
+  if (!MovDelay[x][y])		/* next animation frame */
+    MovDelay[x][y] = 5 * delay;
+
+  if (MovDelay[x][y])		/* wait some time before next frame */
+  {
+    int phase;
+
+    MovDelay[x][y]--;
+    phase = MovDelay[x][y] / delay;
+    if (!(MovDelay[x][y] % delay) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+      DrawGraphic(SCREENX(x), SCREENY(y), GFX_SWITCHGATE_CLOSED + phase);
+
+    if (!MovDelay[x][y])
+    {
+      Feld[x][y] = EL_SWITCHGATE_CLOSED;
+      DrawLevelField(x, y);
+    }
+  }
+}
+
 void EdelsteinFunkeln(int x, int y)
 {
   if (!IN_SCR_FIELD(SCREENX(x), SCREENY(y)) || IS_MOVING(x, y))
@@ -3369,6 +3816,21 @@ static void CheckBuggyBase(int x, int y)
   }
 }
 
+static void DrawBeltAnimation(int x, int y, int element)
+{
+  int belt_nr = getBeltNrFromElement(element);
+  int belt_dir = game.belt_dir[belt_nr];
+
+  if (belt_dir != MV_NO_MOVING)
+  {
+    int delay = 2;
+    int mode = (belt_dir == MV_LEFT ? ANIM_NORMAL : ANIM_REVERSE);
+    int graphic = el2gfx(element) + (belt_dir == MV_LEFT ? 0 : 7);
+
+    DrawGraphicAnimation(x, y, graphic, 8, delay, mode);
+  }
+}
+
 static void PlayerActions(struct PlayerInfo *player, byte player_action)
 {
   static byte stored_player_action[MAX_PLAYERS];
@@ -3622,6 +4084,8 @@ void GameActions()
       Explode(x, y, Frame[x][y], EX_NORMAL);
     else if (element == EL_AMOEBING)
       AmoebeWaechst(x, y);
+    else if (element == EL_DEAMOEBING)
+      AmoebeSchrumpft(x, y);
     else if (IS_AMOEBALIVE(element))
       AmoebeAbleger(x, y);
     else if (element == EL_LIFE || element == EL_LIFE_ASYNC)
@@ -3655,6 +4119,18 @@ void GameActions()
       DrawGraphicAnimation(x, y, GFX2_SP_TERMINAL, 7, 12, ANIM_NORMAL);
     else if (element == EL_SP_TERMINAL_ACTIVE)
       DrawGraphicAnimation(x, y, GFX2_SP_TERMINAL_ACTIVE, 7, 4, ANIM_NORMAL);
+    else if (IS_BELT(element))
+      DrawBeltAnimation(x, y, element);
+    else if (element == EL_SWITCHGATE_OPENING)
+      OpenSwitchgate(x, y);
+    else if (element == EL_SWITCHGATE_CLOSING)
+      CloseSwitchgate(x, y);
+    else if (element == EL_EXTRA_TIME)
+      DrawGraphicAnimation(x, y, GFX_EXTRA_TIME, 6, 4, ANIM_NORMAL);
+    else if (element == EL_FORCE_FIELD_PASSIVE)
+      DrawGraphicAnimation(x, y, GFX_FORCE_FIELD_PASSIVE, 6, 4, ANIM_NORMAL);
+    else if (element == EL_FORCE_FIELD_ACTIVE)
+      DrawGraphicAnimation(x, y, GFX_FORCE_FIELD_ACTIVE, 6, 4, ANIM_NORMAL);
 
     if (game.magic_wall_active)
     {
@@ -3696,6 +4172,7 @@ void GameActions()
 	for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
 	{
 	  element = Feld[x][y];
+
 	  if (element == EL_SIEB_LEER || element == EL_SIEB_VOLL)
 	  {
 	    Feld[x][y] = EL_SIEB_TOT;
@@ -3713,11 +4190,45 @@ void GameActions()
     }
   }
 
-  if (TimeFrames >= (1000 / GameFrameDelay) && !tape.pausing)
+  if (game.light_time_left > 0)
+  {
+    game.light_time_left--;
+
+    if (game.light_time_left == 0)
+    {
+      for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
+      {
+	element = Feld[x][y];
+
+	if (element == EL_LIGHT_SWITCH_ON)
+	{
+	  Feld[x][y] = EL_LIGHT_SWITCH_OFF;
+	  DrawLevelField(x, y);
+	}
+	else if (element == EL_INVISIBLE_STEEL ||
+		 element == EL_UNSICHTBAR ||
+		 element == EL_SAND_INVISIBLE)
+	  DrawLevelField(x, y);
+      }
+    }
+  }
+
+  if (TimeFrames >= (1000 / GameFrameDelay))
   {
     TimeFrames = 0;
     TimePlayed++;
 
+    for (i=0; i<MAX_PLAYERS; i++)
+    {
+      if (FORCE_FIELD_ON(&stored_player[i]))
+      {
+	stored_player[i].force_field_passive_time_left--;
+
+	if (stored_player[i].force_field_active_time_left > 0)
+	  stored_player[i].force_field_active_time_left--;
+      }
+    }
+
     if (tape.recording || tape.playing)
       DrawVideoDisplay(VIDEO_STATE_TIME_ON, TimePlayed);
 
@@ -3875,7 +4386,14 @@ boolean MoveFigureOneStep(struct PlayerInfo *player,
       BuryHero(player);
     }
     else
-      KillHero(player);
+    {
+#if 1
+      TestIfBadThingHitsHero(new_jx, new_jy);
+#else
+      if (player->force_field_time_left == 0)
+	KillHero(player);
+#endif
+    }
 
     return MF_MOVING;
   }
@@ -4189,7 +4707,14 @@ void TestIfGoodThingHitsBadThing(int goodx, int goody)
   if (killx != goodx || killy != goody)
   {
     if (IS_PLAYER(goodx, goody))
-      KillHero(PLAYERINFO(goodx, goody));
+    {
+      struct PlayerInfo *player = PLAYERINFO(goodx, goody);
+
+      if (player->force_field_active_time_left > 0)
+	Bang(killx, killy);
+      else if (player->force_field_passive_time_left == 0)
+	KillHero(player);
+    }
     else
       Bang(goodx, goody);
   }
@@ -4244,7 +4769,14 @@ void TestIfBadThingHitsGoodThing(int badx, int bady)
   if (killx != badx || killy != bady)
   {
     if (IS_PLAYER(killx, killy))
-      KillHero(PLAYERINFO(killx, killy));
+    {
+      struct PlayerInfo *player = PLAYERINFO(killx, killy);
+
+      if (player->force_field_active_time_left > 0)
+	Bang(badx, bady);
+      else if (player->force_field_passive_time_left == 0)
+	KillHero(player);
+    }
     else
       Bang(killx, killy);
   }
@@ -4314,10 +4846,20 @@ void KillHero(struct PlayerInfo *player)
   if (IS_PFORTE(Feld[jx][jy]))
     Feld[jx][jy] = EL_LEERRAUM;
 
+  /* deactivate force field (else Bang()/Explode() would not work right) */
+  player->force_field_passive_time_left = 0;
+  player->force_field_active_time_left = 0;
+
   Bang(jx, jy);
   BuryHero(player);
 }
 
+static void KillHeroUnlessForceField(struct PlayerInfo *player)
+{
+  if (!FORCE_FIELD_ON(player))
+    KillHero(player);
+}
+
 void BuryHero(struct PlayerInfo *player)
 {
   int jx = player->jx, jy = player->jy;
@@ -4386,6 +4928,7 @@ int DigField(struct PlayerInfo *player,
       break;
 
     case EL_ERDREICH:
+    case EL_SAND_INVISIBLE:
       Feld[x][y] = EL_LEERRAUM;
       PlaySoundLevel(x, y, SND_SCHLURF);
       break;
@@ -4423,6 +4966,34 @@ int DigField(struct PlayerInfo *player,
       PlaySoundLevel(x, y, SND_PONG);
       break;
 
+    case EL_ENVELOPE:
+      Feld[x][y] = EL_LEERRAUM;
+      PlaySoundLevel(x, y, SND_PONG);
+      break;
+
+    case EL_EXTRA_TIME:
+      RemoveField(x, y);
+      if (level.time > 0)
+      {
+	TimeLeft += 10;
+	DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FS_SMALL, FC_YELLOW);
+      }
+      PlaySoundStereo(SND_GONG, PSND_MAX_RIGHT);
+      break;
+
+    case EL_FORCE_FIELD_PASSIVE:
+      RemoveField(x, y);
+      player->force_field_passive_time_left += 10;
+      PlaySoundLevel(x, y, SND_PONG);
+      break;
+
+    case EL_FORCE_FIELD_ACTIVE:
+      RemoveField(x, y);
+      player->force_field_passive_time_left += 10;
+      player->force_field_active_time_left += 10;
+      PlaySoundLevel(x, y, SND_PONG);
+      break;
+
     case EL_DYNAMITE_INACTIVE:
     case EL_SP_DISK_RED:
       RemoveField(x, y);
@@ -4526,70 +5097,44 @@ int DigField(struct PlayerInfo *player,
       }
       break;
 
-    case EL_BELT1_SWITCH_L:
-    case EL_BELT1_SWITCH_M:
-    case EL_BELT1_SWITCH_R:
-    case EL_BELT2_SWITCH_L:
-    case EL_BELT2_SWITCH_M:
-    case EL_BELT2_SWITCH_R:
-    case EL_BELT3_SWITCH_L:
-    case EL_BELT3_SWITCH_M:
-    case EL_BELT3_SWITCH_R:
-    case EL_BELT4_SWITCH_L:
-    case EL_BELT4_SWITCH_M:
-    case EL_BELT4_SWITCH_R:
+    case EL_BELT1_SWITCH_LEFT:
+    case EL_BELT1_SWITCH_MIDDLE:
+    case EL_BELT1_SWITCH_RIGHT:
+    case EL_BELT2_SWITCH_LEFT:
+    case EL_BELT2_SWITCH_MIDDLE:
+    case EL_BELT2_SWITCH_RIGHT:
+    case EL_BELT3_SWITCH_LEFT:
+    case EL_BELT3_SWITCH_MIDDLE:
+    case EL_BELT3_SWITCH_RIGHT:
+    case EL_BELT4_SWITCH_LEFT:
+    case EL_BELT4_SWITCH_MIDDLE:
+    case EL_BELT4_SWITCH_RIGHT:
+      if (!player->Switching)
       {
-	static int belt_base_element[4] =
-	{
-	  EL_BELT1_SWITCH_L,
-	  EL_BELT2_SWITCH_L,
-	  EL_BELT3_SWITCH_L,
-	  EL_BELT4_SWITCH_L
-	};
-	static int belt_move_dir[3] =
-	{
-	  MV_LEFT,
-	  MV_NO_MOVING,
-	  MV_RIGHT
-	};
-
-	int belt_nr = (element < EL_BELT2_SWITCH_L ? 0 :
-		       element < EL_BELT3_SWITCH_L ? 1 :
-		       element < EL_BELT4_SWITCH_L ? 2 : 3);
-	int belt_dir_nr = element - belt_base_element[belt_nr];
-	int belt_dir_nr_next = (belt_dir_nr + 1) % 3;
-	int belt_dir_next = belt_move_dir[belt_dir_nr_next];
-	int xx, yy;
-
-	if (player->Switching)
-	  return MF_ACTION;
-
-	game.belt_dir[belt_nr] = belt_dir_next;
-
-	for (yy=0; yy<lev_fieldy; yy++)
-	{
-	  for (xx=0; xx<lev_fieldx; xx++)
-	  {
-	    if (IS_BELT_SWITCH(Feld[xx][yy]))
-	    {
-	      int e = Feld[xx][yy];
-	      int e_belt_nr = (e < EL_BELT2_SWITCH_L ? 0 :
-			       e < EL_BELT3_SWITCH_L ? 1 :
-			       e < EL_BELT4_SWITCH_L ? 2 : 3);
-
-	      if (e_belt_nr == belt_nr)
-	      {
-		Feld[xx][yy] = belt_base_element[belt_nr] + belt_dir_nr_next;
-		DrawLevelField(xx, yy);
-	      }
-	    }
-	  }
-	}
+	player->Switching = TRUE;
+	ToggleBeltSwitch(x, y);
+      }
+      return MF_ACTION;
+      break;
 
+    case EL_SWITCHGATE_SWITCH_1:
+    case EL_SWITCHGATE_SWITCH_2:
+      if (!player->Switching)
+      {
 	player->Switching = TRUE;
+	ToggleSwitchgateSwitch(x, y);
+      }
+      return MF_ACTION;
+      break;
 
-	return MF_ACTION;
+    case EL_LIGHT_SWITCH_OFF:
+    case EL_LIGHT_SWITCH_ON:
+      if (!player->Switching)
+      {
+	player->Switching = TRUE;
+	ToggleLightSwitch(x, y);
       }
+      return MF_ACTION;
       break;
 
     case EL_SP_EXIT:
@@ -4692,6 +5237,18 @@ int DigField(struct PlayerInfo *player,
 
       break;
 
+    case EL_SWITCHGATE_OPEN:
+      if (!IN_LEV_FIELD(x + dx, y + dy) || !IS_FREE(x + dx, y + dy))
+	return MF_NO_ACTION;
+
+      /* automatically move to the next field with double speed */
+      player->programmed_action = move_direction;
+      DOUBLE_PLAYER_SPEED(player);
+
+      PlaySoundLevel(x, y, SND_GATE);
+
+      break;
+
     case EL_SP_PORT1_LEFT:
     case EL_SP_PORT2_LEFT:
     case EL_SP_PORT1_RIGHT:
@@ -4843,7 +5400,6 @@ int DigField(struct PlayerInfo *player,
 
       break;
 
-    case EL_MAULWURF:
     case EL_PINGUIN:
     case EL_SCHWEIN:
     case EL_DRACHE: