rnd-20030703-1-src
[rocksndiamonds.git] / src / game.c
index 2f6eb82fa5fca0e17ac4bcc28076501e3fb8a99c..1b6251b62491bf23a2f579e6764e536e0e7ec38e 100644 (file)
@@ -89,6 +89,9 @@
 #define DOUBLE_PLAYER_SPEED(p) (HALVE_MOVE_DELAY((p)->move_delay_value))
 #define HALVE_PLAYER_SPEED(p)  (DOUBLE_MOVE_DELAY((p)->move_delay_value))
 
+/* values for other actions */
+#define MOVE_STEPSIZE_NORMAL   (TILEX / MOVE_DELAY_NORMAL_SPEED)
+
 #define        INIT_GFX_RANDOM()       (SimpleRND(1000000))
 
 #define GET_NEW_PUSH_DELAY(e)  (   (element_info[e].push_delay_fixed) + \
 #define GET_NEW_MOVE_DELAY(e)  (   (element_info[e].move_delay_fixed) + \
                                 RND(element_info[e].move_delay_random))
 
+#define ELEMENT_CAN_ENTER_FIELD_GENERIC(e, x, y, condition)            \
+               (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||                \
+                                       (condition) ||                  \
+                                       (DONT_COLLIDE_WITH(e) &&        \
+                                        IS_FREE_OR_PLAYER(x, y))))
+
+#define ELEMENT_CAN_ENTER_FIELD_GENERIC_2(x, y, condition)             \
+               (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||                \
+                                       (condition)))
+
+#define ELEMENT_CAN_ENTER_FIELD(e, x, y)                               \
+       ELEMENT_CAN_ENTER_FIELD_GENERIC(e, x, y, 0)
+
+#define ELEMENT_CAN_ENTER_FIELD_OR_ACID(e, x, y)                       \
+       ELEMENT_CAN_ENTER_FIELD_GENERIC(e, x, y, (Feld[x][y] == EL_ACID))
+
+#define ELEMENT_CAN_ENTER_FIELD_OR_ACID_2(x, y)                                \
+       ELEMENT_CAN_ENTER_FIELD_GENERIC_2(x, y, (Feld[x][y] == EL_ACID))
+
+#define ENEMY_CAN_ENTER_FIELD(x, y) (IN_LEV_FIELD(x, y) && IS_FREE(x, y))
+
+#define YAMYAM_CAN_ENTER_FIELD(x, y)                                   \
+               (IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) ||      \
+                                       Feld[x][y] == EL_DIAMOND))
+
+#define DARK_YAMYAM_CAN_ENTER_FIELD(x, y)                              \
+               (IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) ||      \
+                                       IS_FOOD_DARK_YAMYAM(Feld[x][y])))
+
+#define PACMAN_CAN_ENTER_FIELD(x, y)                                   \
+               (IN_LEV_FIELD(x, y) && (IS_FREE_OR_PLAYER(x, y) ||      \
+                                       IS_AMOEBOID(Feld[x][y])))
+
+#define PIG_CAN_ENTER_FIELD(x, y)                                      \
+               (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||                \
+                                       IS_FOOD_PIG(Feld[x][y])))
+
+#define PENGUIN_CAN_ENTER_FIELD(x, y)                                  \
+               (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||                \
+                                       IS_FOOD_PENGUIN(Feld[x][y]) ||  \
+                                       Feld[x][y] == EL_EXIT_OPEN ||   \
+                                       Feld[x][y] == EL_ACID))
+
+#define MOLE_CAN_ENTER_FIELD(x, y, condition)                          \
+               (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) || (condition)))
+
+#define IN_LEV_FIELD_AND_IS_FREE(x, y)  (IN_LEV_FIELD(x, y) &&  IS_FREE(x, y))
+#define IN_LEV_FIELD_AND_NOT_FREE(x, y) (IN_LEV_FIELD(x, y) && !IS_FREE(x, y))
+
 /* game button identifiers */
 #define GAME_CTRL_ID_STOP              0
 #define GAME_CTRL_ID_PAUSE             1
@@ -114,7 +166,12 @@ static void CloseAllOpenTimegates(void);
 static void CheckGravityMovement(struct PlayerInfo *);
 static void KillHeroUnlessProtected(int, int);
 
-static void ChangeElementDoIt(int, int, int);
+static void TestIfPlayerTouchesCustomElement(int, int);
+static void TestIfElementTouchesCustomElement(int, int);
+
+static boolean CheckTriggeredElementChange(int, int);
+static boolean CheckElementChange(int, int, int, int);
+static void ChangeElementNow(int, int, int);
 
 static void PlaySoundLevel(int, int, int);
 static void PlaySoundLevelNearest(int, int, int);
@@ -151,8 +208,8 @@ static void RunTimegateWheel(int x, int y);
 
 struct ChangingElementInfo
 {
-  int base_element;
-  int next_element;
+  int element;
+  int target_element;
   int change_delay;
   void (*pre_change_function)(int x, int y);
   void (*change_function)(int x, int y);
@@ -301,9 +358,70 @@ static struct ChangingElementInfo changing_element_list[] =
   }
 };
 
-static struct ChangingElementInfo changing_element[MAX_NUM_ELEMENTS];
+struct
+{
+  int element;
+  int push_delay_fixed, push_delay_random;
+}
+push_delay_list[] =
+{
+  { EL_SPRING,                 0, 0 },
+  { EL_BALLOON,                        0, 0 },
+
+  { EL_SOKOBAN_OBJECT,         2, 0 },
+  { EL_SOKOBAN_FIELD_FULL,     2, 0 },
+  { EL_SATELLITE,              2, 0 },
+  { EL_SP_DISK_YELLOW,         2, 0 },
+
+  { EL_UNDEFINED,              0, 0 },
+};
+
+struct
+{
+  int element;
+  int move_stepsize;
+}
+move_stepsize_list[] =
+{
+  { EL_AMOEBA_DROP,            2 },
+  { EL_AMOEBA_DROPPING,                2 },
+  { EL_QUICKSAND_FILLING,      1 },
+  { EL_QUICKSAND_EMPTYING,     1 },
+  { EL_MAGIC_WALL_FILLING,     2 },
+  { EL_BD_MAGIC_WALL_FILLING,  2 },
+  { EL_MAGIC_WALL_EMPTYING,    2 },
+  { EL_BD_MAGIC_WALL_EMPTYING, 2 },
+
+  { EL_UNDEFINED,              0 },
+};
+
+struct
+{
+  int element;
+  int gem_count;
+}
+gem_count_list[] =
+{
+  { EL_EMERALD,                        1 },
+  { EL_BD_DIAMOND,             1 },
+  { EL_EMERALD_YELLOW,         1 },
+  { EL_EMERALD_RED,            1 },
+  { EL_EMERALD_PURPLE,         1 },
+  { EL_DIAMOND,                        3 },
+  { EL_SP_INFOTRON,            1 },
+  { EL_PEARL,                  5 },
+  { EL_CRYSTAL,                        8 },
+
+  { EL_UNDEFINED,              0 },
+};
+
+static boolean changing_element[MAX_NUM_ELEMENTS];
+static unsigned long trigger_events[MAX_NUM_ELEMENTS];
 
-#define IS_AUTO_CHANGING(e)  (changing_element[e].base_element != EL_UNDEFINED)
+#define IS_AUTO_CHANGING(e)    (changing_element[e])
+#define IS_JUST_CHANGING(x, y) (ChangeDelay[x][y] != 0)
+#define IS_CHANGING(x, y)      (IS_AUTO_CHANGING(Feld[x][y]) || \
+                                IS_JUST_CHANGING(x, y))
 
 
 void GetPlayerConfig()
@@ -632,6 +750,8 @@ static void InitGameEngine()
     printf("       => game.engine_version == %06d\n", game.engine_version);
 #endif
 
+  /* ---------- initialize player's initial move delay --------------------- */
+
   /* dynamically adjust player properties according to game engine version */
   game.initial_move_delay =
     (game.engine_version <= VERSION_IDENT(2,0,1) ? INITIAL_MOVE_DELAY_ON :
@@ -641,49 +761,141 @@ static void InitGameEngine()
   game.initial_move_delay_value =
     (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
 
+  /* ---------- initialize changing elements ------------------------------- */
+
   /* initialize changing elements information */
   for (i=0; i<MAX_NUM_ELEMENTS; i++)
   {
+#if 1
+    element_info[i].change.pre_change_function = NULL;
+    element_info[i].change.change_function = NULL;
+    element_info[i].change.post_change_function = NULL;
+
+    if (!IS_CUSTOM_ELEMENT(i))
+    {
+      element_info[i].change.target_element = EL_EMPTY_SPACE;
+      element_info[i].change.delay_fixed = 0;
+      element_info[i].change.delay_random = 0;
+      element_info[i].change.delay_frames = 1;
+    }
+
+    changing_element[i] = FALSE;
+#else
     changing_element[i].base_element = EL_UNDEFINED;
     changing_element[i].next_element = EL_UNDEFINED;
     changing_element[i].change_delay = -1;
     changing_element[i].pre_change_function = NULL;
     changing_element[i].change_function = NULL;
     changing_element[i].post_change_function = NULL;
+#endif
   }
 
   /* add changing elements from pre-defined list */
-  i = 0;
-  while (changing_element_list[i].base_element != EL_UNDEFINED)
+  for (i=0; changing_element_list[i].element != EL_UNDEFINED; i++)
   {
+    int element = changing_element_list[i].element;
     struct ChangingElementInfo *ce = &changing_element_list[i];
-    int element = ce->base_element;
+    struct ElementChangeInfo *change = &element_info[element].change;
+
+#if 1
+    change->target_element       = ce->target_element;
+    change->delay_fixed          = ce->change_delay;
+    change->pre_change_function  = ce->pre_change_function;
+    change->change_function      = ce->change_function;
+    change->post_change_function = ce->post_change_function;
 
+    changing_element[element] = TRUE;
+#else
     changing_element[element].base_element         = ce->base_element;
     changing_element[element].next_element         = ce->next_element;
     changing_element[element].change_delay         = ce->change_delay;
     changing_element[element].pre_change_function  = ce->pre_change_function;
     changing_element[element].change_function      = ce->change_function;
     changing_element[element].post_change_function = ce->post_change_function;
-
-    i++;
+#endif
   }
 
   /* add changing elements from custom element configuration */
   for (i=0; i < NUM_CUSTOM_ELEMENTS; i++)
   {
     int element = EL_CUSTOM_START + i;
+#if 0
     struct ElementChangeInfo *change = &element_info[element].change;
+#endif
 
     /* only add custom elements that change after fixed/random frame delay */
     if (!CAN_CHANGE(element) || !HAS_CHANGE_EVENT(element, CE_DELAY))
       continue;
 
+#if 1
+    changing_element[element] = TRUE;
+#else
     changing_element[element].base_element = element;
-    changing_element[element].next_element = change->successor;
+    changing_element[element].next_element = change->target_element;
     changing_element[element].change_delay = (change->delay_fixed *
                                              change->delay_frames);
+#endif
+  }
+
+  /* ---------- initialize trigger events ---------------------------------- */
+
+  /* initialize trigger events information */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    trigger_events[i] = EP_BITMASK_DEFAULT;
+
+  /* add trigger events from element change event properties */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    if (HAS_CHANGE_EVENT(i, CE_BY_OTHER))
+      trigger_events[element_info[i].change.trigger_element] |=
+       element_info[i].change.events;
+
+  /* ---------- initialize push delay -------------------------------------- */
+
+  /* initialize push delay values to default */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+  {
+    if (!IS_CUSTOM_ELEMENT(i))
+    {
+      element_info[i].push_delay_fixed = 2;
+      element_info[i].push_delay_random = 8;
+    }
+  }
+
+  /* set push delay value for certain elements from pre-defined list */
+  for (i=0; push_delay_list[i].element != EL_UNDEFINED; i++)
+  {
+    int e = push_delay_list[i].element;
+
+    element_info[e].push_delay_fixed  = push_delay_list[i].push_delay_fixed;
+    element_info[e].push_delay_random = push_delay_list[i].push_delay_random;
   }
+
+  /* ---------- initialize move stepsize ----------------------------------- */
+
+  /* initialize move stepsize values to default */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    if (!IS_CUSTOM_ELEMENT(i))
+      element_info[i].move_stepsize = MOVE_STEPSIZE_NORMAL;
+
+  /* set move stepsize value for certain elements from pre-defined list */
+  for (i=0; move_stepsize_list[i].element != EL_UNDEFINED; i++)
+  {
+    int e = move_stepsize_list[i].element;
+
+    element_info[e].move_stepsize = move_stepsize_list[i].move_stepsize;
+  }
+
+  /* ---------- initialize gem count --------------------------------------- */
+
+  /* initialize gem count values for each element */
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+    if (!IS_CUSTOM_ELEMENT(i))
+      element_info[i].gem_count = 0;
+
+  /* add gem count values for all elements from pre-defined list */
+  for (i=0; gem_count_list[i].element != EL_UNDEFINED; i++)
+    element_info[gem_count_list[i].element].gem_count =
+      gem_count_list[i].gem_count;
 }
 
 
@@ -762,7 +974,6 @@ void InitGame()
     player->actual_frame_counter = 0;
 
     player->last_move_dir = MV_NO_MOVING;
-    player->is_moving = FALSE;
 
     player->is_moving = FALSE;
     player->is_waiting = FALSE;
@@ -842,6 +1053,7 @@ void InitGame()
       AmoebaNr[x][y] = 0;
       JustStopped[x][y] = 0;
       Stop[x][y] = FALSE;
+      Pushed[x][y] = FALSE;
       ExplodePhase[x][y] = 0;
       ExplodeField[x][y] = EX_NO_EXPLOSION;
 
@@ -1146,7 +1358,9 @@ void InitMovDir(int x, int y)
       {
        if (element_info[element].move_direction_initial != MV_NO_MOVING)
          MovDir[x][y] = element_info[element].move_direction_initial;
-       else if (element_info[element].move_pattern == MV_ALL_DIRECTIONS)
+       else if (element_info[element].move_pattern == MV_ALL_DIRECTIONS ||
+                element_info[element].move_pattern == MV_TURNING_LEFT ||
+                element_info[element].move_pattern == MV_TURNING_RIGHT)
          MovDir[x][y] = 1 << RND(4);
        else if (element_info[element].move_pattern == MV_HORIZONTAL)
          MovDir[x][y] = (RND(2) ? MV_LEFT : MV_RIGHT);
@@ -1439,8 +1653,10 @@ static void ResetGfxAnimation(int x, int y)
 void InitMovingField(int x, int y, int direction)
 {
   int element = Feld[x][y];
-  int newx = x + (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
-  int newy = y + (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
+  int dx = (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
+  int dy = (direction == MV_UP   ? -1 : direction == MV_DOWN  ? +1 : 0);
+  int newx = x + dx;
+  int newy = y + dy;
 
   if (!JustStopped[x][y] || direction != MovDir[x][y])
     ResetGfxAnimation(x, y);
@@ -1529,18 +1745,26 @@ static int MovingOrBlocked2ElementIfNotLeaving(int x, int y)
 static void RemoveField(int x, int y)
 {
   Feld[x][y] = EL_EMPTY;
-  GfxElement[x][y] = EL_UNDEFINED;
+
   MovPos[x][y] = 0;
   MovDir[x][y] = 0;
   MovDelay[x][y] = 0;
+
+  AmoebaNr[x][y] = 0;
   ChangeDelay[x][y] = 0;
+  Pushed[x][y] = FALSE;
+
+  GfxElement[x][y] = EL_UNDEFINED;
+  GfxAction[x][y] = ACTION_DEFAULT;
 }
 
 void RemoveMovingField(int x, int y)
 {
   int oldx = x, oldy = y, newx = x, newy = y;
+  int element = Feld[x][y];
+  int next_element = EL_UNDEFINED;
 
-  if (Feld[x][y] != EL_BLOCKED && !IS_MOVING(x, y))
+  if (element != EL_BLOCKED && !IS_MOVING(x, y))
     return;
 
   if (IS_MOVING(x, y))
@@ -1549,29 +1773,27 @@ void RemoveMovingField(int x, int y)
     if (Feld[newx][newy] != EL_BLOCKED)
       return;
   }
-  else if (Feld[x][y] == EL_BLOCKED)
+  else if (element == EL_BLOCKED)
   {
     Blocked2Moving(x, y, &oldx, &oldy);
     if (!IS_MOVING(oldx, oldy))
       return;
   }
 
-  if (Feld[x][y] == EL_BLOCKED &&
+  if (element == EL_BLOCKED &&
       (Feld[oldx][oldy] == EL_QUICKSAND_EMPTYING ||
        Feld[oldx][oldy] == EL_MAGIC_WALL_EMPTYING ||
        Feld[oldx][oldy] == EL_BD_MAGIC_WALL_EMPTYING ||
        Feld[oldx][oldy] == EL_AMOEBA_DROPPING))
-    Feld[oldx][oldy] = get_next_element(Feld[oldx][oldy]);
-  else
-    Feld[oldx][oldy] = EL_EMPTY;
+    next_element = get_next_element(Feld[oldx][oldy]);
+
+  RemoveField(oldx, oldy);
+  RemoveField(newx, newy);
 
   Store[oldx][oldy] = Store2[oldx][oldy] = 0;
 
-  Feld[newx][newy] = EL_EMPTY;
-  MovPos[oldx][oldy] = MovDir[oldx][oldy] = MovDelay[oldx][oldy] = 0;
-  MovPos[newx][newy] = MovDir[newx][newy] = MovDelay[newx][newy] = 0;
-  ChangeDelay[oldx][oldy] = ChangeDelay[newx][newy] = 0;
-  GfxAction[oldx][oldy] = GfxAction[newx][newy] = ACTION_DEFAULT;
+  if (next_element != EL_UNDEFINED)
+    Feld[oldx][oldy] = next_element;
 
   DrawLevelField(oldx, oldy);
   DrawLevelField(newx, newy);
@@ -1718,6 +1940,19 @@ void Explode(int ex, int ey, int phase, int mode)
       if (element == EL_EXPLOSION)
        element = Store2[x][y];
 
+#if 1
+      if (AmoebaNr[x][y] &&
+         (element == EL_AMOEBA_FULL ||
+          element == EL_BD_AMOEBA ||
+          element == EL_AMOEBA_GROWING))
+      {
+       AmoebaCnt[AmoebaNr[x][y]]--;
+       AmoebaCnt2[AmoebaNr[x][y]]--;
+      }
+
+      RemoveField(x, y);
+#endif
+
       if (IS_PLAYER(ex, ey) && !PLAYER_PROTECTED(ex, ey))
       {
        switch(StorePlayer[ex][ey])
@@ -1781,6 +2016,7 @@ void Explode(int ex, int ey, int phase, int mode)
          center_element == EL_AMOEBA_TO_DIAMOND || mode == EX_BORDER)
        Store2[x][y] = element;
 
+#if 0
       if (AmoebaNr[x][y] &&
          (element == EL_AMOEBA_FULL ||
           element == EL_BD_AMOEBA ||
@@ -1790,10 +2026,21 @@ void Explode(int ex, int ey, int phase, int mode)
        AmoebaCnt2[AmoebaNr[x][y]]--;
       }
 
-      Feld[x][y] = EL_EXPLOSION;
-      GfxElement[x][y] = EL_UNDEFINED;
+#if 1
+      RemoveField(x, y);
+#else
       MovDir[x][y] = MovPos[x][y] = 0;
       AmoebaNr[x][y] = 0;
+#endif
+#endif
+
+      Feld[x][y] = EL_EXPLOSION;
+#if 1
+      GfxElement[x][y] = center_element;
+#else
+      GfxElement[x][y] = EL_UNDEFINED;
+#endif
+
       ExplodePhase[x][y] = 1;
       Stop[x][y] = TRUE;
     }
@@ -1846,6 +2093,7 @@ void Explode(int ex, int ey, int phase, int mode)
 
     element = Feld[x][y] = Store[x][y];
     Store[x][y] = Store2[x][y] = 0;
+    GfxElement[x][y] = EL_UNDEFINED;
 
     if (Back[x][y] && IS_INDESTRUCTIBLE(Back[x][y]))
       element = Feld[x][y] = Back[x][y];
@@ -1862,10 +2110,14 @@ void Explode(int ex, int ey, int phase, int mode)
   }
   else if (phase >= delay && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
   {
+#if 1
+    int graphic = el_act2img(GfxElement[x][y], ACTION_EXPLODING);
+#else
     int stored = Store[x][y];
     int graphic = (game.emulation != EMU_SUPAPLEX ? IMG_EXPLOSION :
                   stored == EL_SP_INFOTRON ? IMG_SP_EXPLOSION_INFOTRON :
                   IMG_SP_EXPLOSION);
+#endif
     int frame = getGraphicAnimationFrame(graphic, phase - delay);
 
     if (phase == delay)
@@ -1940,12 +2192,28 @@ void DynaExplode(int ex, int ey)
 
 void Bang(int x, int y)
 {
+#if 1
+  int element = MovingOrBlocked2Element(x, y);
+#else
   int element = Feld[x][y];
+#endif
+
+  if (IS_PLAYER(x, y))
+  {
+    struct PlayerInfo *player = PLAYERINFO(x, y);
+
+    element = Feld[x][y] = (player->use_murphy_graphic ? EL_SP_MURPHY :
+                           player->element_nr);
+  }
 
+#if 1
+  PlaySoundLevelAction(x, y, ACTION_EXPLODING);
+#else
   if (game.emulation == EMU_SUPAPLEX)
     PlaySoundLevel(x, y, SND_SP_ELEMENT_EXPLODING);
   else
     PlaySoundLevel(x, y, SND_ELEMENT_EXPLODING);
+#endif
 
 #if 0
   if (IS_PLAYER(x, y)) /* remove objects that might cause smaller explosion */
@@ -1987,6 +2255,8 @@ void Bang(int x, int y)
       Explode(x, y, EX_PHASE_START, EX_NORMAL);
       break;
   }
+
+  CheckTriggeredElementChange(element, CE_OTHER_IS_EXPLODING);
 }
 
 void SplashAcid(int x, int y)
@@ -2351,14 +2621,7 @@ void Impact(int x, int y)
     DrawLevelField(x, y);
   }
 
-#if 1
   if (impact && CAN_EXPLODE_IMPACT(element))
-#else
-  if ((element == EL_BOMB ||
-       element == EL_SP_DISK_ORANGE ||
-       element == EL_DX_SUPABOMB) &&
-      (lastline || object_hit))                /* element is bomb */
-#endif
   {
     Bang(x, y);
     return;
@@ -2369,15 +2632,24 @@ void Impact(int x, int y)
     PlaySoundLevel(x, y, SND_PEARL_BREAKING);
     return;
   }
+#if 1
+  else if (impact && CheckElementChange(x, y, element, ACTION_IMPACT))
+  {
+    PlaySoundLevelElementAction(x, y, element, ACTION_IMPACT);
+
+    return;
+  }
+#else
   else if (impact && CAN_CHANGE(element) &&
           HAS_CHANGE_EVENT(element, CE_IMPACT))
   {
     PlaySoundLevelElementAction(x, y, element, ACTION_IMPACT);
 
-    ChangeElementDoIt(x, y, element_info[element].change.successor);
+    ChangeElementNow(x, y, element);
 
     return;
   }
+#endif
 
   if (impact && element == EL_AMOEBA_DROP)
   {
@@ -2395,11 +2667,7 @@ void Impact(int x, int y)
     return;
   }
 
-#if 1
   if (object_hit)              /* check which object was hit */
-#else
-  if (!lastline && object_hit)         /* check which object was hit */
-#endif
   {
     if (CAN_PASS_MAGIC_WALL(element) && 
        (smashed == EL_MAGIC_WALL ||
@@ -2457,35 +2725,15 @@ void Impact(int x, int y)
       Bang(x, y + 1);
       return;
     }
-#if 1
     else if (CAN_SMASH_EVERYTHING(element))
-#else
-    else if (element == EL_ROCK ||
-            element == EL_SP_ZONK ||
-            element == EL_BD_ROCK)
-#endif
     {
       if (IS_CLASSIC_ENEMY(smashed) ||
-#if 1
          CAN_EXPLODE_SMASHED(smashed))
-#else
-         smashed == EL_BOMB ||
-         smashed == EL_SP_DISK_ORANGE ||
-         smashed == EL_DX_SUPABOMB ||
-         smashed == EL_SATELLITE ||
-         smashed == EL_PIG ||
-         smashed == EL_DRAGON ||
-         smashed == EL_MOLE)
-#endif
       {
        Bang(x, y + 1);
        return;
       }
-#if 1
       else if (!IS_MOVING(x, y + 1) && !IS_BLOCKED(x, y + 1))
-#else
-      else if (!IS_MOVING(x, y + 1))
-#endif
       {
        if (smashed == EL_LAMP ||
            smashed == EL_LAMP_ACTIVE)
@@ -2508,11 +2756,7 @@ void Impact(int x, int y)
        }
        else if (smashed == EL_DIAMOND)
        {
-#if 1
          Feld[x][y + 1] = EL_DIAMOND_BREAKING;
-#else
-         Feld[x][y + 1] = EL_EMPTY;
-#endif
          PlaySoundLevel(x, y, SND_DIAMOND_BREAKING);
          return;
        }
@@ -2530,11 +2774,21 @@ void Impact(int x, int y)
        {
          ToggleLightSwitch(x, y + 1);
        }
-       else if (CAN_CHANGE(smashed) &&
-                HAS_CHANGE_EVENT(smashed, CE_SMASHED))
+#if 1
+       else
+       {
+         CheckElementChange(x, y + 1, smashed, CE_SMASHED);
+       }
+#else
+       else if (CAN_CHANGE(smashed) && HAS_CHANGE_EVENT(smashed, CE_SMASHED))
        {
-         ChangeElementDoIt(x, y + 1, element_info[smashed].change.successor);
+         ChangeElementNow(x, y + 1, smashed);
        }
+#endif
+      }
+      else
+      {
+       CheckElementChange(x, y + 1, smashed, CE_SMASHED);
       }
     }
   }
@@ -2582,7 +2836,9 @@ void TurnRound(int x, int y)
     { MV_UP,   MV_DOWN,        MV_LEFT  },
     { 0,       0,              0        },
     { MV_LEFT, MV_RIGHT,       MV_DOWN  },
-    { 0,0,0 }, { 0,0,0 },      { 0,0,0  },
+    { 0,       0,              0        },
+    { 0,       0,              0        },
+    { 0,       0,              0        },
     { MV_RIGHT,        MV_LEFT,        MV_UP    }
   };
 
@@ -2601,15 +2857,15 @@ void TurnRound(int x, int y)
   int right_x = x + right_dx, right_y = y + right_dy;
   int move_x  = x + move_dx,  move_y  = y + move_dy;
 
+  int xx, yy;
+
   if (element == EL_BUG || element == EL_BD_BUTTERFLY)
   {
     TestIfBadThingTouchesOtherBadThing(x, y);
 
-    if (IN_LEV_FIELD(right_x, right_y) &&
-       IS_FREE(right_x, right_y))
+    if (ENEMY_CAN_ENTER_FIELD(right_x, right_y))
       MovDir[x][y] = right_dir;
-    else if (!IN_LEV_FIELD(move_x, move_y) ||
-            !IS_FREE(move_x, move_y))
+    else if (!ENEMY_CAN_ENTER_FIELD(move_x, move_y))
       MovDir[x][y] = left_dir;
 
     if (element == EL_BUG && MovDir[x][y] != old_move_dir)
@@ -2622,15 +2878,14 @@ void TurnRound(int x, int y)
   {
     TestIfBadThingTouchesOtherBadThing(x, y);
 
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       IS_FREE(left_x, left_y))
+    if (ENEMY_CAN_ENTER_FIELD(left_x, left_y))
       MovDir[x][y] = left_dir;
-    else if (!IN_LEV_FIELD(move_x, move_y) ||
-            !IS_FREE(move_x, move_y))
+    else if (!ENEMY_CAN_ENTER_FIELD(move_x, move_y))
       MovDir[x][y] = right_dir;
 
     if ((element == EL_SPACESHIP ||
-        element == EL_SP_SNIKSNAK || element == EL_SP_ELECTRON)
+        element == EL_SP_SNIKSNAK ||
+        element == EL_SP_ELECTRON)
        && MovDir[x][y] != old_move_dir)
       MovDelay[x][y] = 9;
     else if (element == EL_BD_FIREFLY)     /* && MovDir[x][y] == right_dir) */
@@ -2638,16 +2893,8 @@ void TurnRound(int x, int y)
   }
   else if (element == EL_YAMYAM)
   {
-    boolean can_turn_left = FALSE, can_turn_right = FALSE;
-
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       (IS_FREE_OR_PLAYER(left_x, left_y) ||
-        Feld[left_x][left_y] == EL_DIAMOND))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x, right_y) &&
-       (IS_FREE_OR_PLAYER(right_x, right_y) ||
-        Feld[right_x][right_y] == EL_DIAMOND))
-      can_turn_right = TRUE;
+    boolean can_turn_left  = YAMYAM_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = YAMYAM_CAN_ENTER_FIELD(right_x, right_y);
 
     if (can_turn_left && can_turn_right)
       MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
@@ -2658,20 +2905,12 @@ void TurnRound(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    MovDelay[x][y] = 16+16*RND(3);
+    MovDelay[x][y] = 16 + 16 * RND(3);
   }
   else if (element == EL_DARK_YAMYAM)
   {
-    boolean can_turn_left = FALSE, can_turn_right = FALSE;
-
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       (IS_FREE_OR_PLAYER(left_x, left_y) ||
-        IS_FOOD_DARK_YAMYAM(Feld[left_x][left_y])))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x, right_y) &&
-       (IS_FREE_OR_PLAYER(right_x, right_y) ||
-        IS_FOOD_DARK_YAMYAM(Feld[right_x][right_y])))
-      can_turn_right = TRUE;
+    boolean can_turn_left  = DARK_YAMYAM_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = DARK_YAMYAM_CAN_ENTER_FIELD(right_x, right_y);
 
     if (can_turn_left && can_turn_right)
       MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
@@ -2682,20 +2921,12 @@ void TurnRound(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    MovDelay[x][y] = 16+16*RND(3);
+    MovDelay[x][y] = 16 + 16 * RND(3);
   }
   else if (element == EL_PACMAN)
   {
-    boolean can_turn_left = FALSE, can_turn_right = FALSE;
-
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       (IS_FREE_OR_PLAYER(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_OR_PLAYER(right_x, right_y) ||
-        IS_AMOEBOID(Feld[right_x][right_y])))
-      can_turn_right = TRUE;
+    boolean can_turn_left  = PACMAN_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = PACMAN_CAN_ENTER_FIELD(right_x, right_y);
 
     if (can_turn_left && can_turn_right)
       MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
@@ -2706,56 +2937,45 @@ void TurnRound(int x, int y)
     else
       MovDir[x][y] = back_dir;
 
-    MovDelay[x][y] = 6+RND(40);
+    MovDelay[x][y] = 6 + RND(40);
   }
   else if (element == EL_PIG)
   {
-    boolean can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
-    boolean should_turn_left = FALSE, should_turn_right = FALSE;
-    boolean should_move_on = FALSE;
+    boolean can_turn_left  = PIG_CAN_ENTER_FIELD(left_x, left_y);
+    boolean can_turn_right = PIG_CAN_ENTER_FIELD(right_x, right_y);
+    boolean can_move_on    = PIG_CAN_ENTER_FIELD(move_x, move_y);
+    boolean should_turn_left, should_turn_right, should_move_on;
     int rnd_value = 24;
     int rnd = RND(rnd_value);
 
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       (IS_FREE(left_x, left_y) || IS_FOOD_PIG(Feld[left_x][left_y])))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x, right_y) &&
-       (IS_FREE(right_x, right_y) || IS_FOOD_PIG(Feld[right_x][right_y])))
-      can_turn_right = TRUE;
-    if (IN_LEV_FIELD(move_x, move_y) &&
-       (IS_FREE(move_x, move_y) || IS_FOOD_PIG(Feld[move_x][move_y])))
-      can_move_on = TRUE;
-
-    if (can_turn_left &&
-       (!can_move_on ||
-        (IN_LEV_FIELD(x+back_dx+left_dx, y+back_dy+left_dy) &&
-         !IS_FREE(x+back_dx+left_dx, y+back_dy+left_dy))))
-      should_turn_left = TRUE;
-    if (can_turn_right &&
-       (!can_move_on ||
-        (IN_LEV_FIELD(x+back_dx+right_dx, y+back_dy+right_dy) &&
-         !IS_FREE(x+back_dx+right_dx, y+back_dy+right_dy))))
-      should_turn_right = TRUE;
-    if (can_move_on &&
-       (!can_turn_left || !can_turn_right ||
-        (IN_LEV_FIELD(x+move_dx+left_dx, y+move_dy+left_dy) &&
-         !IS_FREE(x+move_dx+left_dx, y+move_dy+left_dy)) ||
-        (IN_LEV_FIELD(x+move_dx+right_dx, y+move_dy+right_dy) &&
-         !IS_FREE(x+move_dx+right_dx, y+move_dy+right_dy))))
-      should_move_on = TRUE;
+    should_turn_left = (can_turn_left &&
+                       (!can_move_on ||
+                        IN_LEV_FIELD_AND_NOT_FREE(x + back_dx + left_dx,
+                                                  y + back_dy + left_dy)));
+    should_turn_right = (can_turn_right &&
+                        (!can_move_on ||
+                         IN_LEV_FIELD_AND_NOT_FREE(x + back_dx + right_dx,
+                                                   y + back_dy + right_dy)));
+    should_move_on = (can_move_on &&
+                     (!can_turn_left ||
+                      !can_turn_right ||
+                      IN_LEV_FIELD_AND_NOT_FREE(x + move_dx + left_dx,
+                                                y + move_dy + left_dy) ||
+                      IN_LEV_FIELD_AND_NOT_FREE(x + move_dx + right_dx,
+                                                y + move_dy + right_dy)));
 
     if (should_turn_left || should_turn_right || should_move_on)
     {
       if (should_turn_left && should_turn_right && should_move_on)
-       MovDir[x][y] = (rnd < rnd_value/3 ? left_dir :
-                       rnd < 2*rnd_value/3 ? right_dir :
+       MovDir[x][y] = (rnd < rnd_value / 3     ? left_dir :
+                       rnd < 2 * rnd_value / 3 ? right_dir :
                        old_move_dir);
       else if (should_turn_left && should_turn_right)
-       MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : right_dir);
+       MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : right_dir);
       else if (should_turn_left && should_move_on)
-       MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : old_move_dir);
+       MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : old_move_dir);
       else if (should_turn_right && should_move_on)
-       MovDir[x][y] = (rnd < rnd_value/2 ? right_dir : old_move_dir);
+       MovDir[x][y] = (rnd < rnd_value / 2 ? right_dir : old_move_dir);
       else if (should_turn_left)
        MovDir[x][y] = left_dir;
       else if (should_turn_right)
@@ -2763,69 +2983,67 @@ void TurnRound(int x, int y)
       else if (should_move_on)
        MovDir[x][y] = old_move_dir;
     }
-    else if (can_move_on && rnd > rnd_value/8)
+    else if (can_move_on && rnd > rnd_value / 8)
       MovDir[x][y] = old_move_dir;
     else if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : right_dir);
-    else if (can_turn_left && rnd > rnd_value/8)
+      MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : right_dir);
+    else if (can_turn_left && rnd > rnd_value / 8)
       MovDir[x][y] = left_dir;
     else if (can_turn_right && rnd > rnd_value/8)
       MovDir[x][y] = right_dir;
     else
       MovDir[x][y] = back_dir;
 
-    if (!IS_FREE(x+move_xy[MovDir[x][y]].x, y+move_xy[MovDir[x][y]].y) &&
-       !IS_FOOD_PIG(Feld[x+move_xy[MovDir[x][y]].x][y+move_xy[MovDir[x][y]].y]))
+    xx = x + move_xy[MovDir[x][y]].x;
+    yy = y + move_xy[MovDir[x][y]].y;
+
+    if (!IS_FREE(xx, yy) && !IS_FOOD_PIG(Feld[xx][yy]))
       MovDir[x][y] = old_move_dir;
 
     MovDelay[x][y] = 0;
   }
   else if (element == EL_DRAGON)
   {
-    boolean can_turn_left = FALSE, can_turn_right = FALSE, can_move_on = FALSE;
+    boolean can_turn_left  = IN_LEV_FIELD_AND_IS_FREE(left_x, left_y);
+    boolean can_turn_right = IN_LEV_FIELD_AND_IS_FREE(right_x, right_y);
+    boolean can_move_on    = IN_LEV_FIELD_AND_IS_FREE(move_x, move_y);
     int rnd_value = 24;
     int rnd = RND(rnd_value);
 
-    if (IN_LEV_FIELD(left_x, left_y) && IS_FREE(left_x, left_y))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x, right_y) && IS_FREE(right_x, right_y))
-      can_turn_right = TRUE;
-    if (IN_LEV_FIELD(move_x, move_y) && IS_FREE(move_x, move_y))
-      can_move_on = TRUE;
-
-    if (can_move_on && rnd > rnd_value/8)
+    if (can_move_on && rnd > rnd_value / 8)
       MovDir[x][y] = old_move_dir;
     else if (can_turn_left && can_turn_right)
-      MovDir[x][y] = (rnd < rnd_value/2 ? left_dir : right_dir);
-    else if (can_turn_left && rnd > rnd_value/8)
+      MovDir[x][y] = (rnd < rnd_value / 2 ? left_dir : right_dir);
+    else if (can_turn_left && rnd > rnd_value / 8)
       MovDir[x][y] = left_dir;
-    else if (can_turn_right && rnd > rnd_value/8)
+    else if (can_turn_right && rnd > rnd_value / 8)
       MovDir[x][y] = right_dir;
     else
       MovDir[x][y] = back_dir;
 
-    if (!IS_FREE(x+move_xy[MovDir[x][y]].x, y+move_xy[MovDir[x][y]].y))
+    xx = x + move_xy[MovDir[x][y]].x;
+    yy = y + move_xy[MovDir[x][y]].y;
+
+    if (!IS_FREE(xx, yy))
       MovDir[x][y] = old_move_dir;
 
     MovDelay[x][y] = 0;
   }
   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_AMOEBA_SHRINKING))
-      can_move_on = TRUE;
-
+    boolean can_move_on =
+      (MOLE_CAN_ENTER_FIELD(move_x, move_y,
+                           IS_AMOEBOID(Feld[move_x][move_y]) ||
+                           Feld[move_x][move_y] == EL_AMOEBA_SHRINKING));
     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;
+      boolean can_turn_left =
+       (MOLE_CAN_ENTER_FIELD(left_x, left_y,
+                             IS_AMOEBOID(Feld[left_x][left_y])));
+
+      boolean can_turn_right =
+       (MOLE_CAN_ENTER_FIELD(right_x, right_y,
+                             IS_AMOEBOID(Feld[right_x][right_y])));
 
       if (can_turn_left && can_turn_right)
        MovDir[x][y] = (RND(2) ? left_dir : right_dir);
@@ -2845,9 +3063,9 @@ void TurnRound(int x, int y)
   }
   else if (element == EL_SPRING)
   {
-    if ((MovDir[x][y] == MV_LEFT || MovDir[x][y] == MV_RIGHT) &&
-       (!IN_LEV_FIELD(move_x, move_y) || !IS_FREE(move_x, move_y) ||
-        (IN_LEV_FIELD(x, y + 1) && IS_FREE(x, y + 1))))
+    if (MovDir[x][y] & MV_HORIZONTAL &&
+       (!IN_LEV_FIELD_AND_IS_FREE(move_x, move_y) ||
+        IN_LEV_FIELD_AND_IS_FREE(x, y + 1)))
       MovDir[x][y] = MV_NO_MOVING;
 
     MovDelay[x][y] = 0;
@@ -2875,7 +3093,8 @@ void TurnRound(int x, int y)
        if (!player->active)
          continue;
 
-       if (attr_x == -1 || ABS(jx-x)+ABS(jy-y) < ABS(attr_x-x)+ABS(attr_y-y))
+       if (attr_x == -1 ||
+           ABS(jx - x) + ABS(jy - y) < ABS(attr_x - x) + ABS(attr_y - y))
        {
          attr_x = jx;
          attr_y = jy;
@@ -2933,11 +3152,40 @@ void TurnRound(int x, int y)
       Moving2Blocked(x, y, &newx, &newy);
 
       if (IN_LEV_FIELD(newx, newy) && IS_FREE_OR_PLAYER(newx, newy))
-       MovDelay[x][y] = 8+8*!RND(3);
+       MovDelay[x][y] = 8 + 8 * !RND(3);
       else
        MovDelay[x][y] = 16;
     }
-    else
+    else if (element == EL_PENGUIN)
+    {
+      int newx, newy;
+
+      MovDelay[x][y] = 1;
+
+      if (MovDir[x][y] & MV_HORIZONTAL && MovDir[x][y] & MV_VERTICAL)
+      {
+       boolean first_horiz = RND(2);
+       int new_move_dir = MovDir[x][y];
+
+       MovDir[x][y] =
+         new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+       Moving2Blocked(x, y, &newx, &newy);
+
+       if (PENGUIN_CAN_ENTER_FIELD(newx, newy))
+         return;
+
+       MovDir[x][y] =
+         new_move_dir & (!first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
+       Moving2Blocked(x, y, &newx, &newy);
+
+       if (PENGUIN_CAN_ENTER_FIELD(newx, newy))
+         return;
+
+       MovDir[x][y] = old_move_dir;
+       return;
+      }
+    }
+    else       /* (element == EL_SATELLITE) */
     {
       int newx, newy;
 
@@ -2952,24 +3200,14 @@ void TurnRound(int x, int y)
          new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
        Moving2Blocked(x, y, &newx, &newy);
 
-       if (IN_LEV_FIELD(newx, newy) &&
-           (IS_FREE(newx, newy) ||
-            Feld[newx][newy] == EL_ACID ||
-            (element == EL_PENGUIN &&
-             (Feld[newx][newy] == EL_EXIT_OPEN ||
-              IS_FOOD_PENGUIN(Feld[newx][newy])))))
+       if (ELEMENT_CAN_ENTER_FIELD_OR_ACID_2(newx, newy))
          return;
 
        MovDir[x][y] =
          new_move_dir & (!first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
        Moving2Blocked(x, y, &newx, &newy);
 
-       if (IN_LEV_FIELD(newx, newy) &&
-           (IS_FREE(newx, newy) ||
-            Feld[newx][newy] == EL_ACID ||
-            (element == EL_PENGUIN &&
-             (Feld[newx][newy] == EL_EXIT_OPEN ||
-              IS_FOOD_PENGUIN(Feld[newx][newy])))))
+       if (ELEMENT_CAN_ENTER_FIELD_OR_ACID_2(newx, newy))
          return;
 
        MovDir[x][y] = old_move_dir;
@@ -2977,20 +3215,18 @@ void TurnRound(int x, int y)
       }
     }
   }
-  else if (element_info[element].move_pattern == MV_ALL_DIRECTIONS)
+  else if (element_info[element].move_pattern == MV_ALL_DIRECTIONS ||
+          element_info[element].move_pattern == MV_TURNING_LEFT ||
+          element_info[element].move_pattern == MV_TURNING_RIGHT)
   {
-    boolean can_turn_left = FALSE, can_turn_right = FALSE;
-
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       (IS_FREE(left_x, left_y) ||
-        (DONT_COLLIDE_WITH(element) && IS_FREE_OR_PLAYER(left_x, left_y))))
-      can_turn_left = TRUE;
-    if (IN_LEV_FIELD(right_x, right_y) &&
-       (IS_FREE(right_x, right_y) ||
-        (DONT_COLLIDE_WITH(element) && IS_FREE_OR_PLAYER(right_x, right_y))))
-      can_turn_right = TRUE;
+    boolean can_turn_left  = ELEMENT_CAN_ENTER_FIELD(element, left_x, left_y);
+    boolean can_turn_right = ELEMENT_CAN_ENTER_FIELD(element, right_x,right_y);
 
-    if (can_turn_left && can_turn_right)
+    if (element_info[element].move_pattern == MV_TURNING_LEFT)
+      MovDir[x][y] = left_dir;
+    else if (element_info[element].move_pattern == MV_TURNING_RIGHT)
+      MovDir[x][y] = right_dir;
+    else if (can_turn_left && can_turn_right)
       MovDir[x][y] = (RND(3) ? (RND(2) ? left_dir : right_dir) : back_dir);
     else if (can_turn_left)
       MovDir[x][y] = (RND(2) ? left_dir : back_dir);
@@ -3020,13 +3256,9 @@ void TurnRound(int x, int y)
   }
   else if (element_info[element].move_pattern == MV_ALONG_LEFT_SIDE)
   {
-    if (IN_LEV_FIELD(left_x, left_y) &&
-       (IS_FREE(left_x, left_y) ||
-        (DONT_COLLIDE_WITH(element) && IS_FREE_OR_PLAYER(left_x, left_y))))
+    if (ELEMENT_CAN_ENTER_FIELD(element, left_x, left_y))
       MovDir[x][y] = left_dir;
-    else if (!IN_LEV_FIELD(move_x, move_y) ||
-            (!IS_FREE(move_x, move_y) &&
-             (!DONT_COLLIDE_WITH(element) || !IS_FREE_OR_PLAYER(move_x, move_y))))
+    else if (!ELEMENT_CAN_ENTER_FIELD(element, move_x, move_y))
       MovDir[x][y] = right_dir;
 
     if (MovDir[x][y] != old_move_dir)
@@ -3034,13 +3266,9 @@ void TurnRound(int x, int y)
   }
   else if (element_info[element].move_pattern == MV_ALONG_RIGHT_SIDE)
   {
-    if (IN_LEV_FIELD(right_x, right_y) &&
-       (IS_FREE(right_x, right_y) ||
-        (DONT_COLLIDE_WITH(element) && IS_FREE_OR_PLAYER(right_x, right_y))))
+    if (ELEMENT_CAN_ENTER_FIELD(element, right_x, right_y))
       MovDir[x][y] = right_dir;
-    else if (!IN_LEV_FIELD(move_x, move_y) ||
-            (!IS_FREE(move_x, move_y) &&
-             (!DONT_COLLIDE_WITH(element) || !IS_FREE_OR_PLAYER(move_x, move_y))))
+    else if (!ELEMENT_CAN_ENTER_FIELD(element, move_x, move_y))
       MovDir[x][y] = left_dir;
 
     if (MovDir[x][y] != old_move_dir)
@@ -3071,7 +3299,8 @@ void TurnRound(int x, int y)
        if (!player->active)
          continue;
 
-       if (attr_x == -1 || ABS(jx-x)+ABS(jy-y) < ABS(attr_x-x)+ABS(attr_y-y))
+       if (attr_x == -1 ||
+           ABS(jx - x) + ABS(jy - y) < ABS(attr_x - x) + ABS(attr_y - y))
        {
          attr_x = jx;
          attr_y = jy;
@@ -3100,20 +3329,14 @@ void TurnRound(int x, int y)
        new_move_dir & (first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
       Moving2Blocked(x, y, &newx, &newy);
 
-      if (IN_LEV_FIELD(newx, newy) && (IS_FREE(newx, newy) ||
-                                      (DONT_COLLIDE_WITH(element) &&
-                                       IS_FREE_OR_PLAYER(newx, newy)) ||
-                                      Feld[newx][newy] == EL_ACID))
+      if (ELEMENT_CAN_ENTER_FIELD_OR_ACID(element, newx, newy))
        return;
 
       MovDir[x][y] =
        new_move_dir & (!first_horiz ? MV_HORIZONTAL : MV_VERTICAL);
       Moving2Blocked(x, y, &newx, &newy);
 
-      if (IN_LEV_FIELD(newx, newy) && (IS_FREE(newx, newy) ||
-                                      (DONT_COLLIDE_WITH(element) &&
-                                       IS_FREE_OR_PLAYER(newx, newy)) ||
-                                      Feld[newx][newy] == EL_ACID))
+      if (ELEMENT_CAN_ENTER_FIELD_OR_ACID(element, newx, newy))
        return;
 
       MovDir[x][y] = old_move_dir;
@@ -3296,11 +3519,26 @@ void StartMoving(int x, int y)
       GfxAction[x][y + 1] = ACTION_ACTIVE;
 #endif
     }
+#if 1
+#if 1
+    else if (game.engine_version < RELEASE_IDENT(2,2,0,7) &&
+            CAN_SMASH(element) && Feld[x][y + 1] == EL_BLOCKED &&
+            JustStopped[x][y] && !Pushed[x][y + 1])
+#else
     else if (CAN_SMASH(element) && Feld[x][y + 1] == EL_BLOCKED &&
             JustStopped[x][y])
+#endif
     {
+      /* calling "Impact()" here is not only completely unneccessary
+        (because it already gets called from "ContinueMoving()" in
+        all relevant situations), but also completely bullshit, because
+        "JustStopped" also indicates a finished *horizontal* movement;
+        we must keep this trash for backwards compatibility with older
+        tapes */
+
       Impact(x, y);
     }
+#endif
     else if (IS_FREE(x, y + 1) && element == EL_SPRING && use_spring_bug)
     {
       if (MovDir[x][y] == MV_NO_MOVING)
@@ -3334,7 +3572,7 @@ void StartMoving(int x, int y)
             element != EL_DX_SUPABOMB)
 #endif
 #else
-    else if ((IS_SLIPPERY(Feld[x][y + 1]) ||
+    else if (((IS_SLIPPERY(Feld[x][y + 1]) && !IS_PLAYER(x, y + 1)) ||
              (IS_EM_SLIPPERY_WALL(Feld[x][y + 1]) && IS_GEM(element))) &&
             !IS_FALLING(x, y + 1) && !JustStopped[x][y + 1] &&
             element != EL_DX_SUPABOMB && element != EL_SP_DISK_ORANGE)
@@ -3354,6 +3592,11 @@ void StartMoving(int x, int y)
 
        InitMovingField(x, y, left ? MV_LEFT : MV_RIGHT);
        started_moving = TRUE;
+
+#if 0
+       if (element == EL_BOMB)
+         printf("::: SLIP DOWN [%d]\n", FrameCounter);
+#endif
       }
     }
     else if (IS_BELT_ACTIVE(Feld[x][y + 1]))
@@ -3374,7 +3617,7 @@ void StartMoving(int x, int y)
     }
   }
 
-  /* not "else if" because of EL_SPRING */
+  /* not "else if" because of elements that can fall and move (EL_SPRING) */
   if (CAN_MOVE(element) && !started_moving)
   {
     int newx, newy;
@@ -3407,7 +3650,9 @@ void StartMoving(int x, int y)
       if (element != EL_YAMYAM &&
          element != EL_DARK_YAMYAM &&
          element != EL_PACMAN &&
-         !(element_info[element].move_pattern & MV_ANY_DIRECTION))
+         !(element_info[element].move_pattern & MV_ANY_DIRECTION) &&
+         element_info[element].move_pattern != MV_TURNING_LEFT &&
+         element_info[element].move_pattern != MV_TURNING_RIGHT)
       {
        TurnRound(x, y);
 
@@ -3760,8 +4005,22 @@ 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 / MOVE_DELAY_NORMAL_SPEED;
+  int nextx = newx + dx, nexty = newy + dy;
+#if 1
+  int sign = (horiz_move ? dx : dy);
+  int step = sign * element_info[element].move_stepsize;
+#else
+  int step = (horiz_move ? dx : dy) * MOVE_STEPSIZE_NORMAL;
+#endif
+  boolean pushed = Pushed[x][y];
 
+#if 1
+  if (CAN_FALL(element) && horiz_move &&
+      y < lev_fieldy - 1 && IS_BELT_ACTIVE(Feld[x][y + 1]))
+    step = sign * MOVE_STEPSIZE_NORMAL / 2;
+  else if (element == EL_SPRING && horiz_move)
+    step = sign * MOVE_STEPSIZE_NORMAL * 2;
+#else
   if (element == EL_AMOEBA_DROP || element == EL_AMOEBA_DROPPING)
     step /= 2;
   else if (element == EL_QUICKSAND_FILLING ||
@@ -3783,10 +4042,14 @@ void ContinueMoving(int x, int y)
 #if OLD_GAME_BEHAVIOUR
   else if (CAN_FALL(element) && horiz_move && !IS_SP_ELEMENT(element))
     step*=2;
+#endif
 #endif
 
   MovPos[x][y] += step;
 
+  if (pushed)          /* special case: moving object pushed by player */
+    MovPos[x][y] = SIGN(MovPos[x][y]) * (TILEX - ABS(PLAYERINFO(x,y)->MovPos));
+
   if (ABS(MovPos[x][y]) >= TILEX)      /* object reached its destination */
   {
     Feld[x][y] = EL_EMPTY;
@@ -3862,6 +4125,16 @@ void ContinueMoving(int x, int y)
       Feld[x][y] = get_next_element(element);
       element = Feld[newx][newy] = Store[x][y];
     }
+    else if (element == EL_SOKOBAN_OBJECT)
+    {
+      if (Back[x][y])
+       Feld[x][y] = Back[x][y];
+
+      if (Back[newx][newy])
+       Feld[newx][newy] = EL_SOKOBAN_FIELD_FULL;
+
+      Back[x][y] = Back[newx][newy] = 0;
+    }
     else if (Store[x][y] == EL_ACID)
     {
       element = Feld[newx][newy] = EL_ACID;
@@ -3879,20 +4152,29 @@ void ContinueMoving(int x, int y)
     GfxAction[newx][newy] = GfxAction[x][y];   /* keep action one frame */
     GfxRandom[newx][newy] = GfxRandom[x][y];   /* keep same random value */
 
+    Pushed[x][y] = Pushed[newx][newy] = FALSE;
+
     ResetGfxAnimation(x, y);   /* reset animation values for old field */
 
-#if 1
 #if 0
+    /* 2.1.1 (does not work correctly for spring) */
     if (!CAN_MOVE(element))
       MovDir[newx][newy] = 0;
 #else
-    /*
+
+#if 0
+    /* (does not work for falling objects that slide horizontally) */
     if (CAN_FALL(element) && MovDir[newx][newy] == MV_DOWN)
       MovDir[newx][newy] = 0;
+#else
+    /*
+    if (!CAN_MOVE(element) ||
+       (element == EL_SPRING && MovDir[newx][newy] == MV_DOWN))
+      MovDir[newx][newy] = 0;
     */
 
     if (!CAN_MOVE(element) ||
-       (element == EL_SPRING && MovDir[newx][newy] == MV_DOWN))
+       (CAN_FALL(element) && MovDir[newx][newy] == MV_DOWN))
       MovDir[newx][newy] = 0;
 #endif
 #endif
@@ -3900,8 +4182,10 @@ void ContinueMoving(int x, int y)
     DrawLevelField(x, y);
     DrawLevelField(newx, newy);
 
-    Stop[newx][newy] = TRUE;
-    JustStopped[newx][newy] = 3;
+    Stop[newx][newy] = TRUE;   /* ignore this element until the next frame */
+
+    if (!pushed)       /* special case: moving object pushed by player */
+      JustStopped[newx][newy] = 3;
 
     if (DONT_TOUCH(element))   /* object may be nasty to player or others */
     {
@@ -3912,15 +4196,15 @@ void ContinueMoving(int x, int y)
     else if (element == EL_PENGUIN)
       TestIfFriendTouchesBadThing(newx, newy);
 
-#if 1
     if (CAN_FALL(element) && direction == MV_DOWN &&
        (newy == lev_fieldy - 1 || !IS_FREE(x, newy + 1)))
       Impact(x, newy);
-#else
-    if (CAN_SMASH(element) && direction == MV_DOWN &&
-       (newy == lev_fieldy - 1 || !IS_FREE(x, newy + 1)))
-      Impact(x, newy);
-#endif
+
+    if (!IN_LEV_FIELD(nextx, nexty) || !IS_FREE(nextx, nexty))
+      CheckElementChange(newx, newy, element, CE_COLLISION);
+
+    TestIfPlayerTouchesCustomElement(newx, newy);
+    TestIfElementTouchesCustomElement(newx, newy);
   }
   else                         /* still moving on */
   {
@@ -4812,10 +5096,16 @@ static void ChangeActiveTrap(int x, int y)
     DrawLevelFieldCrumbledSand(x, y);
 }
 
-static void ChangeElementDoIt(int x, int y, int element)
+static void ChangeElementNowExt(int x, int y, int target_element)
 {
+  if (IS_PLAYER(x, y) && !IS_ACCESSIBLE(target_element))
+  {
+    Bang(x, y);
+    return;
+  }
+
   RemoveField(x, y);
-  Feld[x][y] = element;
+  Feld[x][y] = target_element;
 
   ResetGfxAnimation(x, y);
   ResetRandomAnimationValue(x, y);
@@ -4856,12 +5146,108 @@ static void ChangeElementDoIt(int x, int y, int element)
   }
 }
 
+static void ChangeElementNow(int x, int y, int element)
+{
+  struct ElementChangeInfo *change = &element_info[element].change;
+
+  CheckTriggeredElementChange(Feld[x][y], CE_OTHER_IS_CHANGING);
+
+  if (change->explode)
+  {
+    Bang(x, y);
+    return;
+  }
+
+  if (change->use_content)
+  {
+    boolean complete_change = TRUE;
+    boolean can_change[3][3];
+    int xx, yy;
+
+    for (yy = 0; yy < 3; yy++) for(xx = 0; xx < 3 ; xx++)
+    {
+      boolean half_destructible;
+      int ex = x + xx - 1;
+      int ey = y + yy - 1;
+      int e;
+
+      can_change[xx][yy] = TRUE;
+
+      if (ex == x && ey == y)  /* do not check changing element itself */
+       continue;
+
+      if (change->content[xx][yy] == EL_EMPTY_SPACE)
+      {
+       can_change[xx][yy] = FALSE;     /* do not change empty borders */
+
+       continue;
+      }
+
+      if (!IN_LEV_FIELD(ex, ey))
+      {
+       can_change[xx][yy] = FALSE;
+       complete_change = FALSE;
+
+       continue;
+      }
+
+      e = Feld[ex][ey];
+
+      half_destructible = (IS_FREE(ex, ey) || IS_DIGGABLE(e));
+
+      if ((change->power <= CP_NON_DESTRUCTIVE  && !IS_FREE(ex, ey)) ||
+         (change->power <= CP_HALF_DESTRUCTIVE && !half_destructible) ||
+         (change->power <= CP_FULL_DESTRUCTIVE && IS_INDESTRUCTIBLE(e)))
+      {
+       can_change[xx][yy] = FALSE;
+       complete_change = FALSE;
+      }
+    }
+
+    if (!change->only_complete || complete_change)
+    {
+      if (change->only_complete && change->use_random_change &&
+         RND(change->random) != 0)
+       return;
+
+      for (yy = 0; yy < 3; yy++) for(xx = 0; xx < 3 ; xx++)
+      {
+       int ex = x + xx - 1;
+       int ey = y + yy - 1;
+
+       if (can_change[xx][yy] && (!change->use_random_change ||
+                                  RND(change->random) == 0))
+       {
+         ChangeElementNowExt(ex, ey, change->content[xx][yy]);
+
+         /* for symmetry reasons, stop newly created border elements */
+         if (ex != x || ey != y)
+           Stop[ex][ey] = TRUE;
+       }
+      }
+
+      return;
+    }
+  }
+
+  ChangeElementNowExt(x, y, change->target_element);
+}
+
 static void ChangeElement(int x, int y)
 {
+#if 1
+  int element = MovingOrBlocked2Element(x, y);
+#else
   int element = Feld[x][y];
+#endif
+  struct ElementChangeInfo *change = &element_info[element].change;
 
   if (ChangeDelay[x][y] == 0)          /* initialize element change */
   {
+#if 1
+    ChangeDelay[x][y] = (    change->delay_fixed  * change->delay_frames +
+                        RND(change->delay_random * change->delay_frames)) + 1;
+#else
     ChangeDelay[x][y] = changing_element[element].change_delay + 1;
 
     if (IS_CUSTOM_ELEMENT(element) && HAS_CHANGE_EVENT(element, CE_DELAY))
@@ -4871,12 +5257,18 @@ static void ChangeElement(int x, int y)
 
       ChangeDelay[x][y] += RND(max_random_delay * delay_frames);
     }
+#endif
 
     ResetGfxAnimation(x, y);
     ResetRandomAnimationValue(x, y);
 
+#if 1
+    if (change->pre_change_function)
+      change->pre_change_function(x, y);
+#else
     if (changing_element[element].pre_change_function)
       changing_element[element].pre_change_function(x, y);
+#endif
   }
 
   ChangeDelay[x][y]--;
@@ -4888,11 +5280,20 @@ static void ChangeElement(int x, int y)
     if (IS_ANIMATED(graphic))
       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
 
+#if 1
+    if (change->change_function)
+      change->change_function(x, y);
+#else
     if (changing_element[element].change_function)
       changing_element[element].change_function(x, y);
+#endif
   }
   else                                 /* finish element change */
   {
+#if 0
+    int next_element = changing_element[element].next_element;
+#endif
+
     if (IS_MOVING(x, y))               /* never change a running system ;-) */
     {
       ChangeDelay[x][y] = 1;           /* try change after next move step */
@@ -4901,53 +5302,61 @@ static void ChangeElement(int x, int y)
     }
 
 #if 1
-    ChangeElementDoIt(x, y, changing_element[element].next_element);
+    ChangeElementNow(x, y, element);
+
+    if (change->post_change_function)
+      change->post_change_function(x, y);
 #else
-    RemoveField(x, y);
-    Feld[x][y] = changing_element[element].next_element;
+    if (next_element != EL_UNDEFINED)
+      ChangeElementNow(x, y, next_element);
+    else
+      ChangeElementNow(x, y, element_info[element].change.target_element);
 
-    ResetGfxAnimation(x, y);
-    ResetRandomAnimationValue(x, y);
+    if (changing_element[element].post_change_function)
+      changing_element[element].post_change_function(x, y);
+#endif
+  }
+}
 
-    InitField(x, y, FALSE);
-    if (CAN_MOVE(Feld[x][y]))
-      InitMovDir(x, y);
+static boolean CheckTriggeredElementChange(int trigger_element,
+                                          int trigger_event)
+{
+  int i, x, y;
 
-    DrawLevelField(x, y);
+  if (!(trigger_events[trigger_element] & CH_EVENT_BIT(trigger_event)))
+    return FALSE;
 
-    if (CAN_BE_CRUMBLED(Feld[x][y]))
-    {
-      int sx = SCREENX(x), sy = SCREENY(y);
-      static int xy[4][2] =
-      {
-       { 0, -1 },
-       { -1, 0 },
-       { +1, 0 },
-       { 0, +1 }
-      };
-      int i;
+  for (i=0; i<MAX_NUM_ELEMENTS; i++)
+  {
+    if (!CAN_CHANGE(i) || !HAS_CHANGE_EVENT(i, trigger_event) ||
+       element_info[i].change.trigger_element != trigger_element)
+      continue;
 
-      for(i=0; i<4; i++)
+    for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
+    {
+      if (Feld[x][y] == i)
       {
-       int xx = x + xy[i][0];
-       int yy = y + xy[i][1];
-       int sxx = sx + xy[i][0];
-       int syy = sy + xy[i][1];
-
-       if (!IN_LEV_FIELD(xx, yy) ||
-           !IN_SCR_FIELD(sxx, syy) ||
-           !CAN_BE_CRUMBLED(Feld[xx][yy]) ||
-           IS_MOVING(xx, yy))
-         continue;
-
-       DrawLevelField(xx, yy);
+       ChangeDelay[x][y] = 1;
+       ChangeElement(x, y);
       }
     }
-#endif
-
-    if (changing_element[element].post_change_function)
-      changing_element[element].post_change_function(x, y);
   }
+
+  return TRUE;
+}
+
+static boolean CheckElementChange(int x, int y, int element, int trigger_event)
+{
+  if (!CAN_CHANGE(element) || !HAS_CHANGE_EVENT(element, trigger_event))
+    return FALSE;
+
+  if (Feld[x][y] == EL_BLOCKED)
+    Blocked2Moving(x, y, &x, &y);
+
+  ChangeDelay[x][y] = 1;
+  ChangeElement(x, y);
+
+  return TRUE;
 }
 
 static void PlayerActions(struct PlayerInfo *player, byte player_action)
@@ -5116,6 +5525,30 @@ void GameActions()
     stored_player[i].Frame++;
 #endif
 
+#if 1
+  if (game.engine_version < RELEASE_IDENT(2,2,0,7))
+  {
+    for (i=0; i<MAX_PLAYERS; i++)
+    {
+      struct PlayerInfo *player = &stored_player[i];
+      int x = player->jx;
+      int y = player->jy;
+
+      if (player->active && player->Pushing && player->is_moving &&
+         IS_MOVING(x, y))
+      {
+       ContinueMoving(x, y);
+
+       /* continue moving after pushing (this is actually a bug) */
+       if (!IS_MOVING(x, y))
+       {
+         Stop[x][y] = FALSE;
+       }
+      }
+    }
+  }
+#endif
+
   for (y=0; y<lev_fieldy; y++) for (x=0; x<lev_fieldx; x++)
   {
     Stop[x][y] = FALSE;
@@ -5182,7 +5615,7 @@ void GameActions()
 
 #if 1
     /* this may take place after moving, so 'element' may have changed */
-    if (IS_AUTO_CHANGING(element))
+    if (IS_CHANGING(x, y))
     {
       ChangeElement(x, y);
       element = Feld[x][y];
@@ -5272,7 +5705,7 @@ void GameActions()
 #endif
     else if (element == EL_EXPLOSION)
       ;        /* drawing of correct explosion animation is handled separately */
-    else if (IS_ANIMATED(graphic) && !IS_AUTO_CHANGING(element))
+    else if (IS_ANIMATED(graphic) && !IS_CHANGING(x, y))
       DrawLevelGraphicAnimationIfNeeded(x, y, graphic);
 
 #if 0
@@ -5854,6 +6287,7 @@ boolean MoveFigure(struct PlayerInfo *player, int dx, int dy)
   }
 
   TestIfHeroTouchesBadThing(jx, jy);
+  TestIfPlayerTouchesCustomElement(jx, jy);
 
   if (!player->active)
     RemoveHero(player);
@@ -5954,6 +6388,75 @@ void ScrollScreen(struct PlayerInfo *player, int mode)
     ScreenMovDir = MV_NO_MOVING;
 }
 
+void TestIfPlayerTouchesCustomElement(int x, int y)
+{
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  boolean center_is_player = (IS_PLAYER(x, y));
+  int i;
+
+  for (i=0; i<4; i++)
+  {
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
+
+    if (!IN_LEV_FIELD(xx, yy))
+      continue;
+
+    if (center_is_player)
+    {
+      CheckTriggeredElementChange(Feld[xx][yy], CE_OTHER_GETS_TOUCHED);
+      CheckElementChange(xx, yy, Feld[xx][yy], CE_TOUCHED_BY_PLAYER);
+    }
+    else if (IS_PLAYER(xx, yy))
+    {
+      CheckTriggeredElementChange(Feld[x][y], CE_OTHER_GETS_TOUCHED);
+      CheckElementChange(x, y, Feld[x][y], CE_TOUCHED_BY_PLAYER);
+
+      break;
+    }
+  }
+}
+
+void TestIfElementTouchesCustomElement(int x, int y)
+{
+  static int xy[4][2] =
+  {
+    { 0, -1 },
+    { -1, 0 },
+    { +1, 0 },
+    { 0, +1 }
+  };
+  boolean center_is_custom = (IS_CUSTOM_ELEMENT(Feld[x][y]));
+  int i;
+
+  for (i=0; i<4; i++)
+  {
+    int xx = x + xy[i][0];
+    int yy = y + xy[i][1];
+
+    if (!IN_LEV_FIELD(xx, yy))
+      continue;
+
+    if (center_is_custom &&
+       Feld[xx][yy] == element_info[Feld[x][y]].change.trigger_element)
+    {
+      CheckElementChange(x, y, Feld[x][y], CE_OTHER_IS_TOUCHING);
+    }
+
+    if (IS_CUSTOM_ELEMENT(Feld[xx][yy]) &&
+       Feld[x][y] == element_info[Feld[xx][yy]].change.trigger_element)
+    {
+      CheckElementChange(xx, yy, Feld[xx][yy], CE_OTHER_IS_TOUCHING);
+    }
+  }
+}
+
 void TestIfGoodThingHitsBadThing(int good_x, int good_y, int good_move_dir)
 {
   int i, kill_x = -1, kill_y = -1;
@@ -6210,7 +6713,11 @@ void BuryHero(struct PlayerInfo *player)
   if (!player->active)
     return;
 
+#if 1
+  PlaySoundLevelElementAction(jx, jy, player->element_nr, ACTION_DYING);
+#else
   PlaySoundLevel(jx, jy, SND_CLASS_PLAYER_DYING);
+#endif
   PlaySoundLevel(jx, jy, SND_GAME_LOSING);
 
   player->GameOver = TRUE;
@@ -6240,10 +6747,12 @@ void RemoveHero(struct PlayerInfo *player)
 }
 
 /*
+  =============================================================================
   checkDiagonalPushing()
   -----------------------------------------------------------------------------
   check if diagonal input device direction results in pushing of object
   (by checking if the alternative direction is walkable, diggable, ...)
+  =============================================================================
 */
 
 static boolean checkDiagonalPushing(struct PlayerInfo *player,
@@ -6266,17 +6775,21 @@ static boolean checkDiagonalPushing(struct PlayerInfo *player,
 }
 
 /*
+  =============================================================================
   DigField()
   -----------------------------------------------------------------------------
   x, y:                        field next to player (non-diagonal) to try to dig to
   real_dx, real_dy:    direction as read from input device (can be diagonal)
+  =============================================================================
 */
 
 int DigField(struct PlayerInfo *player,
             int x, int y, int real_dx, int real_dy, int mode)
 {
+  boolean use_spring_bug = (game.engine_version < VERSION_IDENT(2,2,0));
   int jx = player->jx, jy = player->jy;
   int dx = x - jx, dy = y - jy;
+  int nextx = x + dx, nexty = y + dy;
   int move_direction = (dx == -1 ? MV_LEFT :
                        dx == +1 ? MV_RIGHT :
                        dy == -1 ? MV_UP :
@@ -6341,166 +6854,12 @@ int DigField(struct PlayerInfo *player,
 
   element = Feld[x][y];
 
-#if 1
   if (mode == DF_SNAP && !IS_SNAPPABLE(element) &&
       game.engine_version >= VERSION_IDENT(2,2,0))
     return MF_NO_ACTION;
-#endif
 
   switch (element)
   {
-    case EL_EMPTY:
-    case EL_SAND:
-    case EL_INVISIBLE_SAND:
-    case EL_INVISIBLE_SAND_ACTIVE:
-    case EL_TRAP:
-    case EL_SP_BASE:
-    case EL_SP_BUGGY_BASE:
-    case EL_SP_BUGGY_BASE_ACTIVATING:
-      RemoveField(x, y);
-#if 1
-      if (mode != DF_SNAP && element != EL_EMPTY)
-      {
-       GfxElement[x][y] = (CAN_BE_CRUMBLED(element) ? EL_SAND : element);
-       player->is_digging = TRUE;
-      }
-#endif
-      PlaySoundLevelElementAction(x, y, element, ACTION_DIGGING);
-      break;
-
-    case EL_EMERALD:
-    case EL_BD_DIAMOND:
-    case EL_EMERALD_YELLOW:
-    case EL_EMERALD_RED:
-    case EL_EMERALD_PURPLE:
-    case EL_DIAMOND:
-    case EL_SP_INFOTRON:
-    case EL_PEARL:
-    case EL_CRYSTAL:
-      RemoveField(x, y);
-#if 1
-      if (mode != DF_SNAP)
-      {
-       GfxElement[x][y] = element;
-       player->is_collecting = TRUE;
-      }
-#endif
-      local_player->gems_still_needed -= (element == EL_DIAMOND ? 3 :
-                                         element == EL_PEARL ? 5 :
-                                         element == EL_CRYSTAL ? 8 : 1);
-      if (local_player->gems_still_needed < 0)
-       local_player->gems_still_needed = 0;
-      RaiseScoreElement(element);
-      DrawText(DX_EMERALDS, DY_EMERALDS,
-              int2str(local_player->gems_still_needed, 3), FONT_TEXT_2);
-      PlaySoundLevelElementAction(x, y, element, ACTION_COLLECTING);
-      break;
-
-    case EL_SPEED_PILL:
-      RemoveField(x, y);
-      player->move_delay_value = MOVE_DELAY_HIGH_SPEED;
-      PlaySoundLevel(x, y, SND_SPEED_PILL_COLLECTING);
-      break;
-
-    case EL_ENVELOPE:
-      Feld[x][y] = EL_EMPTY;
-      PlaySoundLevel(x, y, SND_ENVELOPE_COLLECTING);
-      break;
-
-    case EL_EXTRA_TIME:
-      RemoveField(x, y);
-      if (level.time > 0)
-      {
-       TimeLeft += 10;
-       DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
-      }
-      PlaySoundStereo(SND_EXTRA_TIME_COLLECTING, SOUND_MIDDLE);
-      break;
-
-    case EL_SHIELD_NORMAL:
-      RemoveField(x, y);
-      player->shield_normal_time_left += 10;
-      PlaySoundLevel(x, y, SND_SHIELD_NORMAL_COLLECTING);
-      break;
-
-    case EL_SHIELD_DEADLY:
-      RemoveField(x, y);
-      player->shield_normal_time_left += 10;
-      player->shield_deadly_time_left += 10;
-      PlaySoundLevel(x, y, SND_SHIELD_DEADLY_COLLECTING);
-      break;
-
-    case EL_DYNAMITE:
-    case EL_SP_DISK_RED:
-      RemoveField(x, y);
-      player->dynamite++;
-      player->use_disk_red_graphic = (element == EL_SP_DISK_RED);
-      RaiseScoreElement(EL_DYNAMITE);
-      DrawText(DX_DYNAMITE, DY_DYNAMITE, int2str(local_player->dynamite, 3),
-              FONT_TEXT_2);
-      PlaySoundLevelElementAction(x, y, element, ACTION_COLLECTING);
-      break;
-
-    case EL_DYNABOMB_INCREASE_NUMBER:
-      RemoveField(x, y);
-      player->dynabomb_count++;
-      player->dynabombs_left++;
-      RaiseScoreElement(EL_DYNAMITE);
-      PlaySoundLevel(x, y, SND_DYNABOMB_INCREASE_NUMBER_COLLECTING);
-      break;
-
-    case EL_DYNABOMB_INCREASE_SIZE:
-      RemoveField(x, y);
-      player->dynabomb_size++;
-      RaiseScoreElement(EL_DYNAMITE);
-      PlaySoundLevel(x, y, SND_DYNABOMB_INCREASE_SIZE_COLLECTING);
-      break;
-
-    case EL_DYNABOMB_INCREASE_POWER:
-      RemoveField(x, y);
-      player->dynabomb_xl = TRUE;
-      RaiseScoreElement(EL_DYNAMITE);
-      PlaySoundLevel(x, y, SND_DYNABOMB_INCREASE_POWER_COLLECTING);
-      break;
-
-    case EL_KEY_1:
-    case EL_KEY_2:
-    case EL_KEY_3:
-    case EL_KEY_4:
-    {
-      int key_nr = element - EL_KEY_1;
-      int graphic = el2edimg(element);
-
-      RemoveField(x, y);
-      player->key[key_nr] = TRUE;
-      RaiseScoreElement(element);
-      DrawMiniGraphicExt(drawto, DX_KEYS + key_nr * MINI_TILEX, DY_KEYS,
-                        graphic);
-      DrawMiniGraphicExt(window, DX_KEYS + key_nr * MINI_TILEX, DY_KEYS,
-                        graphic);
-      PlaySoundLevel(x, y, SND_CLASS_KEY_COLLECTING);
-      break;
-    }
-
-    case EL_EM_KEY_1:
-    case EL_EM_KEY_2:
-    case EL_EM_KEY_3:
-    case EL_EM_KEY_4:
-    {
-      int key_nr = element - EL_EM_KEY_1;
-      int graphic = el2edimg(EL_KEY_1 + key_nr);
-
-      RemoveField(x, y);
-      player->key[key_nr] = TRUE;
-      RaiseScoreElement(element);
-      DrawMiniGraphicExt(drawto, DX_KEYS + key_nr * MINI_TILEX, DY_KEYS,
-                        graphic);
-      DrawMiniGraphicExt(window, DX_KEYS + key_nr * MINI_TILEX, DY_KEYS,
-                        graphic);
-      PlaySoundLevel(x, y, SND_CLASS_KEY_COLLECTING);
-      break;
-    }
-
     case EL_ROBOT_WHEEL:
       Feld[x][y] = EL_ROBOT_WHEEL_ACTIVE;
       ZX = x;
@@ -6601,140 +6960,6 @@ int DigField(struct PlayerInfo *player,
       return MF_ACTION;
       break;
 
-      /* the following elements cannot be pushed by "snapping" */
-    case EL_ROCK:
-    case EL_BOMB:
-    case EL_DX_SUPABOMB:
-    case EL_NUT:
-    case EL_TIME_ORB_EMPTY:
-    case EL_SP_ZONK:
-    case EL_SP_DISK_ORANGE:
-    case EL_SPRING:
-      if (mode == DF_SNAP)
-       return MF_NO_ACTION;
-
-      /* no "break" -- fall through to next case */
-
-      /* the following elements can be pushed by "snapping" */
-    case EL_BD_ROCK:
-      if (dy)
-       return MF_NO_ACTION;
-
-      player->Pushing = TRUE;
-
-#if 0
-      if (element == EL_ROCK)
-       printf("::: wanna push [%d] [%d]\n",
-              FrameCounter, player->push_delay_value);
-#endif
-
-      if (!IN_LEV_FIELD(x+dx, y+dy) || !IS_FREE(x+dx, y+dy))
-       return MF_NO_ACTION;
-
-      if (!checkDiagonalPushing(player, x, y, real_dx, real_dy))
-       return MF_NO_ACTION;
-
-      if (player->push_delay == 0)
-       player->push_delay = FrameCounter;
-#if 0
-      if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-         !tape.playing &&
-         element != EL_SPRING)
-       return MF_NO_ACTION;
-#else
-      if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-         !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
-         element != EL_SPRING)
-       return MF_NO_ACTION;
-#endif
-
-      if (mode == DF_SNAP)
-      {
-       InitMovingField(x, y, move_direction);
-       ContinueMoving(x, y);
-      }
-      else
-      {
-       RemoveField(x, y);
-       Feld[x + dx][y + dy] = element;
-      }
-
-      if (element == EL_SPRING)
-      {
-       Feld[x + dx][y + dy] = EL_SPRING;
-       MovDir[x + dx][y + dy] = move_direction;
-      }
-
-      player->push_delay_value = (element == EL_SPRING ? 0 : 2 + RND(8));
-
-      DrawLevelField(x + dx, y + dy);
-      PlaySoundLevelElementAction(x, y, element, ACTION_PUSHING);
-      break;
-
-    case EL_GATE_1:
-    case EL_GATE_2:
-    case EL_GATE_3:
-    case EL_GATE_4:
-      if (!player->key[element - EL_GATE_1])
-       return MF_NO_ACTION;
-      break;
-
-    case EL_GATE_1_GRAY:
-    case EL_GATE_2_GRAY:
-    case EL_GATE_3_GRAY:
-    case EL_GATE_4_GRAY:
-      if (!player->key[element - EL_GATE_1_GRAY])
-       return MF_NO_ACTION;
-      break;
-
-    case EL_EM_GATE_1:
-    case EL_EM_GATE_2:
-    case EL_EM_GATE_3:
-    case EL_EM_GATE_4:
-      if (!player->key[element - EL_EM_GATE_1])
-       return MF_NO_ACTION;
-      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_CLASS_GATE_PASSING);
-      break;
-
-    case EL_EM_GATE_1_GRAY:
-    case EL_EM_GATE_2_GRAY:
-    case EL_EM_GATE_3_GRAY:
-    case EL_EM_GATE_4_GRAY:
-      if (!player->key[element - EL_EM_GATE_1_GRAY])
-       return MF_NO_ACTION;
-      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);
-
-#if 1
-      PlaySoundLevelAction(x, y, ACTION_PASSING);
-#else
-      PlaySoundLevel(x, y, SND_GATE_PASSING);
-#endif
-      break;
-
-    case EL_SWITCHGATE_OPEN:
-    case EL_TIMEGATE_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);
-
-      PlaySoundLevelElementAction(x, y, element, ACTION_PASSING);
-      break;
-
     case EL_SP_PORT_LEFT:
     case EL_SP_PORT_RIGHT:
     case EL_SP_PORT_UP:
@@ -6766,8 +6991,8 @@ int DigField(struct PlayerInfo *player,
           element != EL_SP_GRAVITY_PORT_DOWN &&
           element != EL_SP_PORT_VERTICAL &&
           element != EL_SP_PORT_ANY) ||
-         !IN_LEV_FIELD(x + dx, y + dy) ||
-         !IS_FREE(x + dx, y + dy))
+         !IN_LEV_FIELD(nextx, nexty) ||
+         !IS_FREE(nextx, nexty))
        return MF_NO_ACTION;
 
       /* automatically move to the next field with double speed */
@@ -6816,28 +7041,10 @@ int DigField(struct PlayerInfo *player,
        if (!(tube_enter_directions[i][1] & move_direction))
          return MF_NO_ACTION;  /* tube has no opening in this direction */
 
-       PlaySoundLevel(x, y, SND_CLASS_TUBE_PASSING);
+       PlaySoundLevel(x, y, SND_CLASS_TUBE_WALKING);
       }
       break;
 
-    case EL_EXIT_CLOSED:
-    case EL_SP_EXIT_CLOSED:
-    case EL_EXIT_OPENING:
-      return MF_NO_ACTION;
-      break;
-
-    case EL_EXIT_OPEN:
-    case EL_SP_EXIT_OPEN:
-      if (mode == DF_SNAP)
-       return MF_NO_ACTION;
-
-      if (element == EL_EXIT_OPEN)
-       PlaySoundLevel(x, y, SND_CLASS_EXIT_PASSING);
-      else
-       PlaySoundLevel(x, y, SND_CLASS_SP_EXIT_PASSING);
-
-      break;
-
     case EL_LAMP:
       Feld[x][y] = EL_LAMP_ACTIVE;
       local_player->lights_still_needed--;
@@ -6855,129 +7062,74 @@ int DigField(struct PlayerInfo *player,
       return MF_ACTION;
       break;
 
-    case EL_SOKOBAN_FIELD_EMPTY:
-      break;
-
-    case EL_SOKOBAN_OBJECT:
-    case EL_SOKOBAN_FIELD_FULL:
-    case EL_SATELLITE:
-    case EL_SP_DISK_YELLOW:
-    case EL_BALLOON:
-      if (mode == DF_SNAP)
-       return MF_NO_ACTION;
-
-      player->Pushing = TRUE;
-
-      if (!IN_LEV_FIELD(x+dx, y+dy)
-         || (!IS_FREE(x+dx, y+dy)
-             && (Feld[x+dx][y+dy] != EL_SOKOBAN_FIELD_EMPTY
-                 || !IS_SB_ELEMENT(element))))
-       return MF_NO_ACTION;
-
-      if (!checkDiagonalPushing(player, x, y, real_dx, real_dy))
-       return MF_NO_ACTION;
-
-      if (player->push_delay == 0)
-       player->push_delay = FrameCounter;
-#if 0
-      if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-         !tape.playing && element != EL_BALLOON)
-       return MF_NO_ACTION;
-#else
-      if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-         !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
-         element != EL_BALLOON)
-       return MF_NO_ACTION;
-#endif
+    default:
 
-      if (IS_SB_ELEMENT(element))
+      if (IS_WALKABLE(element))
       {
-       if (element == EL_SOKOBAN_FIELD_FULL)
+       int sound_action = ACTION_WALKING;
+
+       if (element >= EL_GATE_1 && element <= EL_GATE_4)
        {
-         Feld[x][y] = EL_SOKOBAN_FIELD_EMPTY;
-         local_player->sokobanfields_still_needed++;
+         if (!player->key[element - EL_GATE_1])
+           return MF_NO_ACTION;
        }
-       else
-         RemoveField(x, y);
-
-       if (Feld[x+dx][y+dy] == EL_SOKOBAN_FIELD_EMPTY)
+       else if (element >= EL_GATE_1_GRAY && element <= EL_GATE_4_GRAY)
        {
-         Feld[x+dx][y+dy] = EL_SOKOBAN_FIELD_FULL;
-         local_player->sokobanfields_still_needed--;
-         if (element == EL_SOKOBAN_OBJECT)
-#if 1
-           PlaySoundLevelAction(x+dx, y+dy, ACTION_FILLING);
-#else
-           PlaySoundLevel(x, y, SND_CLASS_SOKOBAN_FIELD_FILLING);
-#endif
-         else
-#if 1
-           PlaySoundLevelAction(x+dx, y+dy, ACTION_PUSHING);
-#else
-           PlaySoundLevel(x, y, SND_SOKOBAN_OBJECT_PUSHING);
-#endif
+         if (!player->key[element - EL_GATE_1_GRAY])
+           return MF_NO_ACTION;
        }
-       else
+       else if (element == EL_EXIT_OPEN || element == EL_SP_EXIT_OPEN)
        {
-         Feld[x+dx][y+dy] = EL_SOKOBAN_OBJECT;
-         if (element == EL_SOKOBAN_FIELD_FULL)
-#if 1
-           PlaySoundLevelAction(x+dx, y+dy, ACTION_EMPTYING);
-#else
-           PlaySoundLevel(x, y, SND_SOKOBAN_FIELD_EMPTYING);
-#endif
-         else
-#if 1
-           PlaySoundLevelAction(x+dx, y+dy, ACTION_PUSHING);
-#else
-           PlaySoundLevel(x, y, SND_SOKOBAN_OBJECT_PUSHING);
-#endif
+         sound_action = ACTION_PASSING;        /* player is passing exit */
+       }
+       else if (element == EL_EMPTY)
+       {
+         sound_action = ACTION_MOVING;         /* nothing to walk on */
        }
-      }
-      else
-      {
-       RemoveField(x, y);
-       Feld[x+dx][y+dy] = element;
-       PlaySoundLevelElementAction(x, y, element, ACTION_PUSHING);
-      }
-
-      player->push_delay_value = (element == EL_BALLOON ? 0 : 2);
 
-      DrawLevelField(x, y);
-      DrawLevelField(x + dx, y + dy);
+       /* play sound from background or player, whatever is available */
+       if (element_info[element].sound[sound_action] != SND_UNDEFINED)
+         PlaySoundLevelElementAction(x, y, element, sound_action);
+       else
+         PlaySoundLevelElementAction(x, y, player->element_nr, sound_action);
 
-      if (IS_SB_ELEMENT(element) &&
-         local_player->sokobanfields_still_needed == 0 &&
-         game.emulation == EMU_SOKOBAN)
-      {
-       player->LevelSolved = player->GameOver = TRUE;
-       PlaySoundLevel(x, y, SND_GAME_SOKOBAN_SOLVING);
+       break;
       }
+      else if (IS_PASSABLE(element))
+      {
+       if (!IN_LEV_FIELD(nextx, nexty) || !IS_FREE(nextx, nexty))
+         return MF_NO_ACTION;
 
-      break;
+       if (element >= EL_EM_GATE_1 && element <= EL_EM_GATE_4)
+       {
+         if (!player->key[element - EL_EM_GATE_1])
+           return MF_NO_ACTION;
+       }
+       else if (element >= EL_EM_GATE_1_GRAY && element <= EL_EM_GATE_4_GRAY)
+       {
+         if (!player->key[element - EL_EM_GATE_1_GRAY])
+           return MF_NO_ACTION;
+       }
 
-    case EL_PENGUIN:
-    case EL_PIG:
-    case EL_DRAGON:
-      break;
+       /* automatically move to the next field with double speed */
+       player->programmed_action = move_direction;
+       DOUBLE_PLAYER_SPEED(player);
 
-    default:
+       PlaySoundLevelAction(x, y, ACTION_PASSING);
 
-      if (IS_WALKABLE(element))
-      {
        break;
       }
       else if (IS_DIGGABLE(element))
       {
        RemoveField(x, y);
-#if 1
+
        if (mode != DF_SNAP)
        {
          GfxElement[x][y] =
            (CAN_BE_CRUMBLED(element) ? EL_SAND : GFX_ELEMENT(element));
          player->is_digging = TRUE;
        }
-#endif
+
        PlaySoundLevelElementAction(x, y, element, ACTION_DIGGING);
 
        break;
@@ -6985,32 +7137,102 @@ int DigField(struct PlayerInfo *player,
       else if (IS_COLLECTIBLE(element))
       {
        RemoveField(x, y);
-#if 1
+
        if (mode != DF_SNAP)
        {
          GfxElement[x][y] = element;
          player->is_collecting = TRUE;
        }
-#endif
+
+       if (element == EL_SPEED_PILL)
+         player->move_delay_value = MOVE_DELAY_HIGH_SPEED;
+       else if (element == EL_EXTRA_TIME && level.time > 0)
+       {
+         TimeLeft += 10;
+         DrawText(DX_TIME, DY_TIME, int2str(TimeLeft, 3), FONT_TEXT_2);
+       }
+       else if (element == EL_SHIELD_NORMAL || element == EL_SHIELD_DEADLY)
+       {
+         player->shield_normal_time_left += 10;
+         if (element == EL_SHIELD_DEADLY)
+           player->shield_deadly_time_left += 10;
+       }
+       else if (element == EL_DYNAMITE || element == EL_SP_DISK_RED)
+       {
+         player->dynamite++;
+         player->use_disk_red_graphic = (element == EL_SP_DISK_RED);
+
+         DrawText(DX_DYNAMITE, DY_DYNAMITE,
+                  int2str(local_player->dynamite, 3), FONT_TEXT_2);
+       }
+       else if (element == EL_DYNABOMB_INCREASE_NUMBER)
+       {
+         player->dynabomb_count++;
+         player->dynabombs_left++;
+       }
+       else if (element == EL_DYNABOMB_INCREASE_SIZE)
+       {
+         player->dynabomb_size++;
+       }
+       else if (element == EL_DYNABOMB_INCREASE_POWER)
+       {
+         player->dynabomb_xl = TRUE;
+       }
+       else if ((element >= EL_KEY_1 && element <= EL_KEY_4) ||
+                (element >= EL_EM_KEY_1 && element <= EL_EM_KEY_4))
+       {
+         int key_nr = (element >= EL_KEY_1 && element <= EL_KEY_4 ?
+                       element - EL_KEY_1 : element - EL_EM_KEY_1);
+
+         player->key[key_nr] = TRUE;
+
+         DrawMiniGraphicExt(drawto, DX_KEYS + key_nr * MINI_TILEX, DY_KEYS,
+                            el2edimg(EL_KEY_1 + key_nr));
+         redraw_mask |= REDRAW_DOOR_1;
+       }
+       else if (element_info[element].gem_count > 0)
+       {
+         local_player->gems_still_needed -=
+           element_info[element].gem_count;
+         if (local_player->gems_still_needed < 0)
+           local_player->gems_still_needed = 0;
+
+         DrawText(DX_EMERALDS, DY_EMERALDS,
+                  int2str(local_player->gems_still_needed, 3), FONT_TEXT_2);
+       }
+
+       RaiseScoreElement(element);
        PlaySoundLevelElementAction(x, y, element, ACTION_COLLECTING);
 
+       CheckTriggeredElementChange(element, CE_OTHER_GETS_COLLECTED);
+
        break;
       }
       else if (IS_PUSHABLE(element))
       {
-       if (mode == DF_SNAP)
+       if (mode == DF_SNAP && element != EL_BD_ROCK)
          return MF_NO_ACTION;
 
        if (CAN_FALL(element) && dy)
          return MF_NO_ACTION;
 
+       if (CAN_FALL(element) && IN_LEV_FIELD(x, y + 1) && IS_FREE(x, y + 1) &&
+           !(element == EL_SPRING && use_spring_bug))
+         return MF_NO_ACTION;
+
+       if (element == EL_SPRING && MovDir[x][y] != MV_NO_MOVING)
+         return MF_NO_ACTION;
+
        if (!player->Pushing &&
            game.engine_version >= RELEASE_IDENT(2,2,0,7))
          player->push_delay_value = GET_NEW_PUSH_DELAY(element);
 
        player->Pushing = TRUE;
 
-       if (!IN_LEV_FIELD(x + dx, y + dy) || !IS_FREE(x + dx, y + dy))
+       if (!(IN_LEV_FIELD(nextx, nexty) &&
+             (IS_FREE(nextx, nexty) ||
+              (Feld[nextx][nexty] == EL_SOKOBAN_FIELD_EMPTY &&
+               IS_SB_ELEMENT(element)))))
          return MF_NO_ACTION;
 
        if (!checkDiagonalPushing(player, x, y, real_dx, real_dy))
@@ -7020,24 +7242,68 @@ int DigField(struct PlayerInfo *player,
          player->push_delay = FrameCounter;
 
        if (!FrameReached(&player->push_delay, player->push_delay_value) &&
-           !(tape.playing && tape.file_version < FILE_VERSION_2_0))
+           !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
+           element != EL_SPRING && element != EL_BALLOON)
          return MF_NO_ACTION;
 
-       RemoveField(x, y);
-       Feld[x + dx][y + dy] = element;
+       if (IS_SB_ELEMENT(element))
+       {
+         if (element == EL_SOKOBAN_FIELD_FULL)
+         {
+           Back[x][y] = EL_SOKOBAN_FIELD_EMPTY;
+           local_player->sokobanfields_still_needed++;
+         }
+
+         if (Feld[nextx][nexty] == EL_SOKOBAN_FIELD_EMPTY)
+         {
+           Back[nextx][nexty] = EL_SOKOBAN_FIELD_EMPTY;
+           local_player->sokobanfields_still_needed--;
+         }
+
+         Feld[x][y] = EL_SOKOBAN_OBJECT;
+
+         if (Back[x][y] == Back[nextx][nexty])
+           PlaySoundLevelAction(x, y, ACTION_PUSHING);
+         else if (Back[x][y] != 0)
+           PlaySoundLevelElementAction(x, y, EL_SOKOBAN_FIELD_FULL,
+                                       ACTION_EMPTYING);
+         else
+           PlaySoundLevelElementAction(nextx, nexty, EL_SOKOBAN_FIELD_EMPTY,
+                                       ACTION_FILLING);
+
+         if (local_player->sokobanfields_still_needed == 0 &&
+             game.emulation == EMU_SOKOBAN)
+         {
+           player->LevelSolved = player->GameOver = TRUE;
+           PlaySoundLevel(x, y, SND_GAME_SOKOBAN_SOLVING);
+         }
+       }
+       else
+         PlaySoundLevelElementAction(x, y, element, ACTION_PUSHING);
+
+       InitMovingField(x, y, move_direction);
+
+       if (mode == DF_SNAP)
+         ContinueMoving(x, y);
+       else
+         MovPos[x][y] = (dx != 0 ? dx : dy);
+
+       Pushed[x][y] = TRUE;
+       Pushed[nextx][nexty] = TRUE;
 
-#if 1
        if (game.engine_version < RELEASE_IDENT(2,2,0,7))
          player->push_delay_value = GET_NEW_PUSH_DELAY(element);
-#else
-       player->push_delay_value = 2 + RND(8);
-#endif
 
-       DrawLevelField(x + dx, y + dy);
-       PlaySoundLevelElementAction(x, y, element, ACTION_PUSHING);
+       CheckTriggeredElementChange(element, CE_OTHER_GETS_PUSHED);
+       CheckElementChange(x, y, element, CE_PUSHED_BY_PLAYER);
 
        break;
       }
+      else
+      {
+       CheckTriggeredElementChange(element, CE_OTHER_GETS_PRESSED);
+       CheckElementChange(x, y, element, CE_PRESSED_BY_PLAYER);
+      }
 
       return MF_NO_ACTION;
   }
@@ -7054,6 +7320,10 @@ boolean SnapField(struct PlayerInfo *player, int dx, int dy)
 {
   int jx = player->jx, jy = player->jy;
   int x = jx + dx, y = jy + dy;
+  int snap_direction = (dx == -1 ? MV_LEFT :
+                       dx == +1 ? MV_RIGHT :
+                       dy == -1 ? MV_UP :
+                       dy == +1 ? MV_DOWN : MV_NO_MOVING);
 
   if (player->MovPos && game.engine_version >= VERSION_IDENT(2,2,0))
     return FALSE;
@@ -7083,10 +7353,7 @@ boolean SnapField(struct PlayerInfo *player, int dx, int dy)
   if (player->snapped)
     return FALSE;
 
-  player->MovDir = (dx < 0 ? MV_LEFT :
-                   dx > 0 ? MV_RIGHT :
-                   dy < 0 ? MV_UP :
-                   dy > 0 ? MV_DOWN :  MV_NO_MOVING);
+  player->MovDir = snap_direction;
 
   if (DigField(player, x, y, 0, 0, DF_SNAP) == MF_NO_ACTION)
     return FALSE;
@@ -7326,6 +7593,7 @@ void RaiseScoreElement(int element)
       RaiseScore(level.score[SC_NUT]);
       break;
     case EL_DYNAMITE:
+    case EL_SP_DISK_RED:
     case EL_DYNABOMB_INCREASE_NUMBER:
     case EL_DYNABOMB_INCREASE_SIZE:
     case EL_DYNABOMB_INCREASE_POWER:
@@ -7345,6 +7613,7 @@ void RaiseScoreElement(int element)
       RaiseScore(level.score[SC_KEY]);
       break;
     default:
+      RaiseScore(element_info[element].score);
       break;
   }
 }