rnd-20040612-2-src
[rocksndiamonds.git] / src / game.c
index 467603a896db9d65bcd5dd2e4875e11c0f8ccf79..a8389022119adf4edf8b101a8d74d59844df3d6b 100644 (file)
 /* EXPERIMENTAL STUFF */
 #define USE_NEW_AMOEBA_CODE    FALSE
 
+/* EXPERIMENTAL STUFF */
+#define USE_NEW_MOVE_STYLE     TRUE    *0
+#define USE_NEW_MOVE_DELAY     TRUE    *1
+#define USE_NEW_PUSH_DELAY     TRUE    *1
+#define USE_NEW_BLOCK_STYLE    TRUE    *1
+
 /* for DigField() */
 #define DF_NO_PUSH             0
 #define DF_DIG                 1
        ((e) == EL_TRIGGER_ELEMENT ? (ch)->actual_trigger_element :     \
         (e) == EL_TRIGGER_PLAYER  ? (ch)->actual_trigger_player : (e))
 
+#define GET_VALID_PLAYER_ELEMENT(e)                                    \
+       ((e) >= EL_PLAYER_1 && (e) <= EL_PLAYER_4 ? (e) : EL_PLAYER_1)
+
 #define CAN_GROW_INTO(e)                                               \
-       (e == EL_SAND || (IS_DIGGABLE(e) && level.grow_into_diggable))
+       ((e) == EL_SAND || (IS_DIGGABLE(e) && level.grow_into_diggable))
 
 #define ELEMENT_CAN_ENTER_FIELD_BASE_X(x, y, condition)                        \
                (IN_LEV_FIELD(x, y) && (IS_FREE(x, y) ||                \
 
 /* forward declaration for internal use */
 
+static void AdvanceFrameAndPlayerCounters(int);
+
 static boolean MovePlayerOneStep(struct PlayerInfo *, int, int, int, int);
 static boolean MovePlayer(struct PlayerInfo *, int, int);
 static void ScrollPlayer(struct PlayerInfo *, int);
@@ -381,6 +392,18 @@ struct ChangingElementInfo
 
 static struct ChangingElementInfo change_delay_list[] =
 {
+#if USE_NEW_BLOCK_STYLE
+#if 0
+  {
+    EL_PLAYER_IS_LEAVING,
+    EL_EMPTY,
+    -1,                /* delay for blocking field left by player set at runtime */
+    NULL,
+    NULL,
+    NULL
+  },
+#endif
+#endif
   {
     EL_NUT_BREAKING,
     EL_EMERALD,
@@ -609,31 +632,39 @@ struct
 }
 access_direction_list[] =
 {
-  { EL_TUBE_ANY,               MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
-  { EL_TUBE_VERTICAL,                               MV_UP | MV_DOWN },
-  { EL_TUBE_HORIZONTAL,                MV_LEFT | MV_RIGHT                   },
-  { EL_TUBE_VERTICAL_LEFT,     MV_LEFT |            MV_UP | MV_DOWN },
-  { EL_TUBE_VERTICAL_RIGHT,              MV_RIGHT | MV_UP | MV_DOWN },
-  { EL_TUBE_HORIZONTAL_UP,     MV_LEFT | MV_RIGHT | MV_UP           },
-  { EL_TUBE_HORIZONTAL_DOWN,   MV_LEFT | MV_RIGHT |         MV_DOWN },
-  { EL_TUBE_LEFT_UP,           MV_LEFT |            MV_UP           },
-  { EL_TUBE_LEFT_DOWN,         MV_LEFT |                    MV_DOWN },
-  { EL_TUBE_RIGHT_UP,                    MV_RIGHT | MV_UP           },
-  { EL_TUBE_RIGHT_DOWN,                          MV_RIGHT |         MV_DOWN },
-
-  { EL_SP_PORT_LEFT,                     MV_RIGHT                   },
-  { EL_SP_PORT_RIGHT,          MV_LEFT                              },
-  { EL_SP_PORT_UP,                                          MV_DOWN },
-  { EL_SP_PORT_DOWN,                                MV_UP           },
-  { EL_SP_PORT_HORIZONTAL,     MV_LEFT | MV_RIGHT                   },
-  { EL_SP_PORT_VERTICAL,                            MV_UP | MV_DOWN },
-  { EL_SP_PORT_ANY,            MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
-  { EL_SP_GRAVITY_PORT_LEFT,             MV_RIGHT                   },
-  { EL_SP_GRAVITY_PORT_RIGHT,  MV_LEFT                              },
-  { EL_SP_GRAVITY_PORT_UP,                                  MV_DOWN },
-  { EL_SP_GRAVITY_PORT_DOWN,                        MV_UP           },
-
-  { EL_UNDEFINED,              MV_NO_MOVING                         }
+  { EL_TUBE_ANY,                       MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
+  { EL_TUBE_VERTICAL,                                       MV_UP | MV_DOWN },
+  { EL_TUBE_HORIZONTAL,                        MV_LEFT | MV_RIGHT                   },
+  { EL_TUBE_VERTICAL_LEFT,             MV_LEFT |            MV_UP | MV_DOWN },
+  { EL_TUBE_VERTICAL_RIGHT,                      MV_RIGHT | MV_UP | MV_DOWN },
+  { EL_TUBE_HORIZONTAL_UP,             MV_LEFT | MV_RIGHT | MV_UP           },
+  { EL_TUBE_HORIZONTAL_DOWN,           MV_LEFT | MV_RIGHT |         MV_DOWN },
+  { EL_TUBE_LEFT_UP,                   MV_LEFT |            MV_UP           },
+  { EL_TUBE_LEFT_DOWN,                 MV_LEFT |                    MV_DOWN },
+  { EL_TUBE_RIGHT_UP,                            MV_RIGHT | MV_UP           },
+  { EL_TUBE_RIGHT_DOWN,                                  MV_RIGHT |         MV_DOWN },
+
+  { EL_SP_PORT_LEFT,                             MV_RIGHT                   },
+  { EL_SP_PORT_RIGHT,                  MV_LEFT                              },
+  { EL_SP_PORT_UP,                                                  MV_DOWN },
+  { EL_SP_PORT_DOWN,                                        MV_UP           },
+  { EL_SP_PORT_HORIZONTAL,             MV_LEFT | MV_RIGHT                   },
+  { EL_SP_PORT_VERTICAL,                                    MV_UP | MV_DOWN },
+  { EL_SP_PORT_ANY,                    MV_LEFT | MV_RIGHT | MV_UP | MV_DOWN },
+  { EL_SP_GRAVITY_PORT_LEFT,                     MV_RIGHT                   },
+  { EL_SP_GRAVITY_PORT_RIGHT,          MV_LEFT                              },
+  { EL_SP_GRAVITY_PORT_UP,                                          MV_DOWN },
+  { EL_SP_GRAVITY_PORT_DOWN,                                MV_UP           },
+  { EL_SP_GRAVITY_ON_PORT_LEFT,                          MV_RIGHT                   },
+  { EL_SP_GRAVITY_ON_PORT_RIGHT,       MV_LEFT                              },
+  { EL_SP_GRAVITY_ON_PORT_UP,                                       MV_DOWN },
+  { EL_SP_GRAVITY_ON_PORT_DOWN,                                     MV_UP           },
+  { EL_SP_GRAVITY_OFF_PORT_LEFT,                 MV_RIGHT                   },
+  { EL_SP_GRAVITY_OFF_PORT_RIGHT,      MV_LEFT                              },
+  { EL_SP_GRAVITY_OFF_PORT_UP,                                      MV_DOWN },
+  { EL_SP_GRAVITY_OFF_PORT_DOWN,                            MV_UP           },
+
+  { EL_UNDEFINED,                      MV_NO_MOVING                         }
 };
 
 static unsigned long trigger_events[MAX_NUM_ELEMENTS];
@@ -743,6 +774,10 @@ static void InitPlayerField(int x, int y, int element, boolean init_game)
   {
     struct PlayerInfo *player = &stored_player[Feld[x][y] - EL_PLAYER_1];
     int jx = player->jx, jy = player->jy;
+    int sp_block_delay = 7;
+    int em_block_delay = 7;
+    int sp_no_block_delay = 1;
+    int em_no_block_delay = 1;
 
     player->present = TRUE;
 
@@ -750,6 +785,11 @@ static void InitPlayerField(int x, int y, int element, boolean init_game)
                                level.sp_block_last_field :
                                level.block_last_field);
 
+    player->block_delay_value =
+      (element == EL_SP_MURPHY ?
+       (player->block_last_field ? sp_block_delay : sp_no_block_delay) :
+       (player->block_last_field ? em_block_delay : em_no_block_delay));
+
     if (!options.network || player->connected)
     {
       player->active = TRUE;
@@ -1139,7 +1179,7 @@ static void resolve_group_element(int group_element, int recursion_depth)
 
 /*
   =============================================================================
 InitGameEngine()
+ InitGameEngine()
   -----------------------------------------------------------------------------
   initialize game engine due to level / tape version number
   =============================================================================
@@ -1175,6 +1215,15 @@ static void InitGameEngine()
 
   /* ---------- initialize player's initial move delay --------------------- */
 
+#if USE_NEW_MOVE_DELAY
+  /* dynamically adjust player properties according to level information */
+  game.initial_move_delay_value =
+    (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
+
+  /* dynamically adjust player properties according to game engine version */
+  game.initial_move_delay = (game.engine_version <= VERSION_IDENT(2,0,1,0) ?
+                            game.initial_move_delay_value : 0);
+#else
   /* dynamically adjust player properties according to game engine version */
   game.initial_move_delay =
     (game.engine_version <= VERSION_IDENT(2,0,1,0) ? INITIAL_MOVE_DELAY_ON :
@@ -1183,6 +1232,7 @@ static void InitGameEngine()
   /* dynamically adjust player properties according to level information */
   game.initial_move_delay_value =
     (level.double_speed ? MOVE_DELAY_HIGH_SPEED : MOVE_DELAY_NORMAL_SPEED);
+#endif
 
   /* ---------- initialize player's initial push delay --------------------- */
 
@@ -1357,8 +1407,13 @@ static void InitGameEngine()
     {
       if (IS_SP_ELEMENT(i))
       {
+#if USE_NEW_MOVE_STYLE
+       element_info[i].push_delay_fixed  = 7;  /* just enough to escape ... */
+       element_info[i].push_delay_random = 0;  /* ... from falling zonk     */
+#else
        element_info[i].push_delay_fixed  = 6;  /* just enough to escape ... */
        element_info[i].push_delay_random = 0;  /* ... from falling zonk     */
+#endif
       }
     }
   }
@@ -1483,7 +1538,10 @@ void InitGame()
 
     player->use_murphy_graphic = FALSE;
 
-    player->block_last_field = FALSE;
+    player->block_last_field = FALSE;  /* initialized in InitPlayerField() */
+    player->block_delay = 0;
+    player->block_delay_value = -1;    /* initialized in InitPlayerField() */
+
     player->can_fall_into_acid = CAN_MOVE_INTO_ACID(player->element_nr);
 
     player->actual_frame_counter = 0;
@@ -1559,8 +1617,13 @@ void InitGame()
 
     player->move_delay_reset_counter = 0;
 
-    player->push_delay = 0;
+#if USE_NEW_PUSH_DELAY
+    player->push_delay       = -1;     /* initialized when pushing starts */
     player->push_delay_value = game.initial_push_delay_value;
+#else
+    player->push_delay       = 0;
+    player->push_delay_value = game.initial_push_delay_value;
+#endif
 
     player->drop_delay = 0;
 
@@ -2109,7 +2172,7 @@ void InitMovDir(int x, int y)
        {
 #if 1
          /* use random direction as default start direction */
-         if (game.engine_version >= VERSION_IDENT(3,1,0,2))
+         if (game.engine_version >= VERSION_IDENT(3,1,0,0))
            MovDir[x][y] = 1 << RND(4);
 #endif
 
@@ -2818,7 +2881,11 @@ void DrawRelocatePlayer(struct PlayerInfo *player)
 
 void RelocatePlayer(int jx, int jy, int el_player_raw)
 {
+#if 1
+  int el_player = GET_VALID_PLAYER_ELEMENT(el_player_raw);
+#else
   int el_player = (el_player_raw == EL_SP_MURPHY ? EL_PLAYER_1 :el_player_raw);
+#endif
   struct PlayerInfo *player = &stored_player[el_player - EL_PLAYER_1];
   boolean ffwd_delay = (tape.playing && tape.fast_forward);
   boolean no_delay = (tape.warp_forward);
@@ -2872,7 +2939,12 @@ void RelocatePlayer(int jx, int jy, int el_player_raw)
     {
       ScrollPlayer(player, SCROLL_GO_ON);
       ScrollScreen(NULL, SCROLL_GO_ON);
+
+#if USE_NEW_MOVE_DELAY
+      AdvanceFrameAndPlayerCounters(player->index_nr);
+#else
       FrameCounter++;
+#endif
 
       DrawPlayer(player);
 
@@ -2916,10 +2988,20 @@ void RelocatePlayer(int jx, int jy, int el_player_raw)
   TestIfPlayerTouchesCustomElement(jx, jy);
 #endif
 
-#if 1
+#if 0
+  printf("::: %d,%d: %d\n", jx, jy-1, Changed[jx][jy-1]);
+#endif
+
+#if 0
+#if 0
+  /* needed to allow change of walkable custom element by entering player */
+  if (!(Changed[jx][jy] & CH_EVENT_BIT(CE_ENTERED_BY_PLAYER)))
+    Changed[jx][jy] = 0;       /* allow another change (but prevent loop) */
+#else
   /* needed to allow change of walkable custom element by entering player */
   Changed[jx][jy] = 0;         /* allow another change */
 #endif
+#endif
 
 #if 0
   printf("::: player entering %d, %d from %s ...\n", jx, jy,
@@ -3052,10 +3134,17 @@ void Explode(int ex, int ey, int phase, int mode)
        continue;
 #else
       /* indestructible elements can only explode in center (but not flames) */
+#if 1
+      if ((IS_EXPLOSION_PROOF(element) && (x != ex || y != ey ||
+                                          mode == EX_TYPE_BORDER)) ||
+         element == EL_FLAMES)
+       continue;
+#else
       if ((IS_EXPLOSION_PROOF(element) && (x != ex || y != ey)) ||
          element == EL_FLAMES)
        continue;
 #endif
+#endif
 
 #else
       if ((IS_INDESTRUCTIBLE(element) &&
@@ -3068,7 +3157,7 @@ void Explode(int ex, int ey, int phase, int mode)
 #if 1
       if (IS_PLAYER(x, y) && SHIELD_ON(PLAYERINFO(x, y)) &&
          (game.engine_version < VERSION_IDENT(3,1,0,0) ||
-          (x == ex && y == ey)))
+          (x == ex && y == ey && mode != EX_TYPE_BORDER)))
 #else
       if (IS_PLAYER(x, y) && SHIELD_ON(PLAYERINFO(x, y)))
 #endif
@@ -3083,6 +3172,12 @@ void Explode(int ex, int ey, int phase, int mode)
          Feld[x][y] = (Store[x][y] ? Store[x][y] : EL_EMPTY);
          Store[x][y] = 0;
 #endif
+
+#if 0
+       printf("::: %d,%d: %d %s [%d, %d]\n", x, y, Feld[x][y],
+              element_info[Feld[x][y]].token_name,
+              Store[x][y], Store2[x][y]);
+#endif
        }
 
        continue;
@@ -3094,9 +3189,15 @@ void Explode(int ex, int ey, int phase, int mode)
        Back[x][y] = element;
 #else
 #if 1
+#if 1
+      if (IS_WALKABLE(element) && IS_INDESTRUCTIBLE(element) &&
+         (x != ex || y != ey || mode == EX_TYPE_BORDER))
+       Back[x][y] = element;
+#else
       if (IS_WALKABLE(element) && IS_INDESTRUCTIBLE(element) &&
          (x != ex || y != ey))
        Back[x][y] = element;
+#endif
 #else
       if (IS_WALKABLE(element) && IS_INDESTRUCTIBLE(element))
        Back[x][y] = element;
@@ -3185,10 +3286,15 @@ void Explode(int ex, int ey, int phase, int mode)
       else
        Store[x][y] = EL_EMPTY;
 
-      if (x != ex || y != ey ||
-         center_element == EL_AMOEBA_TO_DIAMOND || mode == EX_TYPE_BORDER)
+      if (x != ex || y != ey || mode == EX_TYPE_BORDER ||
+         center_element == EL_AMOEBA_TO_DIAMOND)
        Store2[x][y] = element;
 
+#if 0
+      printf("::: %d,%d: %d %s\n", x, y, Store2[x][y],
+            element_info[Store2[x][y]].token_name);
+#endif
+
 #if 0
       if (AmoebaNr[x][y] &&
          (element == EL_AMOEBA_FULL ||
@@ -3235,6 +3341,11 @@ void Explode(int ex, int ey, int phase, int mode)
       game.yamyam_content_nr =
        (game.yamyam_content_nr + 1) % level.num_yamyam_contents;
 
+#if 0
+  printf("::: %d,%d: %d %s [%d]\n", ex + 1, ey, Feld[ex + 1][ey],
+        element_info[Feld[ex + 1][ey]].token_name, Store2[ex + 1][ey]);
+#endif
+
     return;
   }
 
@@ -3288,6 +3399,11 @@ void Explode(int ex, int ey, int phase, int mode)
     border_element = StorePlayer[x][y];
 #endif
 
+#if 0
+  printf("::: %d,%d: %d %s [%d]\n", x, y, border_element,
+        element_info[border_element].token_name, Store2[x][y]);
+#endif
+
 #if 0
   printf("::: phase == %d\n", phase);
 #endif
@@ -3318,6 +3434,11 @@ void Explode(int ex, int ey, int phase, int mode)
     }
     else if (CAN_EXPLODE_BY_EXPLOSION(border_element))
     {
+#if 0
+      printf("::: %d,%d: %d %s\n", x, y, border_element,
+            element_info[border_element].token_name);
+#endif
+
       Feld[x][y] = Store2[x][y];
       Store2[x][y] = 0;
       Bang(x, y);
@@ -5229,6 +5350,11 @@ void StartMoving(int x, int y)
 
       CheckCollision[x][y] = 0;
 
+#if 0
+      if (IS_PLAYER(x, y + 1))
+       printf("::: we ARE now killing the player [%d]\n", FrameCounter);
+#endif
+
       Impact(x, y);
     }
     else if (IS_FREE(x, y + 1) && element == EL_SPRING && level.use_spring_bug)
@@ -5380,7 +5506,7 @@ void StartMoving(int x, int y)
 
 #if 1
     if (game.engine_version >= VERSION_IDENT(3,1,0,0) &&
-       CheckCollision[x][y] && IN_LEV_FIELD_AND_NOT_FREE(newx, newy))
+       CheckCollision[x][y] && !IN_LEV_FIELD_AND_IS_FREE(newx, newy))
 #else
     if (game.engine_version >= VERSION_IDENT(3,1,0,0) &&
        WasJustMoving[x][y] && IN_LEV_FIELD(newx, newy) &&
@@ -6304,9 +6430,24 @@ void ContinueMoving(int x, int y)
   else if (element == EL_PENGUIN)
     TestIfFriendTouchesBadThing(newx, newy);
 
+#if USE_NEW_MOVE_STYLE
+#if 0
+  if (CAN_FALL(element) && direction == MV_DOWN &&
+      (newy == lev_fieldy - 1 || !IS_FREE(x, newy + 1)) &&
+      IS_PLAYER(x, newy + 1))
+    printf("::: we would now kill the player [%d]\n", FrameCounter);
+#endif
+
+  /* give the player one last chance (one more frame) to move away */
+  if (CAN_FALL(element) && direction == MV_DOWN &&
+      (newy == lev_fieldy - 1 || !IS_FREE(x, newy + 1)) &&
+      !IS_PLAYER(x, newy + 1))
+    Impact(x, newy);
+#else
   if (CAN_FALL(element) && direction == MV_DOWN &&
       (newy == lev_fieldy - 1 || !IS_FREE(x, newy + 1)))
     Impact(x, newy);
+#endif
 
 #if 1
   if (pushed_by_player)
@@ -7377,6 +7518,11 @@ static void ChangeElementNowExt(int x, int y, int target_element)
   if (IS_PLAYER(x, y) && !PLAYER_EXPLOSION_PROTECTED(x, y) &&
       IS_ACCESSIBLE(Feld[x][y]) && !IS_ACCESSIBLE(target_element))
   {
+#if 0
+    printf("::: BOOOM! [%d, '%s']\n", target_element,
+          element_info[target_element].token_name);
+#endif
+
     Bang(x, y);
     return;
   }
@@ -7417,7 +7563,9 @@ static void ChangeElementNowExt(int x, int y, int target_element)
       DrawLevelFieldCrumbledSandNeighbours(x, y);
   }
 
+#if 0
   Changed[x][y] |= ChangeEvent[x][y];  /* ignore same changes in this frame */
+#endif
 
 #if 0
   TestIfBadThingTouchesHero(x, y);
@@ -7425,9 +7573,14 @@ static void ChangeElementNowExt(int x, int y, int target_element)
   TestIfElementTouchesCustomElement(x, y);
 #endif
 
+  /* "Changed[][]" not set yet to allow "entered by player" change one time */
   if (ELEM_IS_PLAYER(target_element))
     RelocatePlayer(x, y, target_element);
 
+#if 1
+  Changed[x][y] |= ChangeEvent[x][y];  /* ignore same changes in this frame */
+#endif
+
 #if 1
   TestIfBadThingTouchesHero(x, y);
   TestIfPlayerTouchesCustomElement(x, y);
@@ -7514,6 +7667,16 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
        continue;
       }
 
+#if 0
+      if (Changed[ex][ey])     /* do not change already changed elements */
+      {
+       can_replace[xx][yy] = FALSE;
+       complete_replace = FALSE;
+
+       continue;
+      }
+#endif
+
       e = Feld[ex][ey];
 
       if (IS_MOVING(ex, ey) || IS_BLOCKED(ex, ey))
@@ -7537,6 +7700,7 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
 #endif
 
 #endif
+
       is_walkable     = (is_empty || IS_WALKABLE(e));
       is_diggable     = (is_empty || IS_DIGGABLE(e));
       is_collectible  = (is_empty || IS_COLLECTIBLE(e));
@@ -7544,12 +7708,13 @@ static boolean ChangeElementNow(int x, int y, int element, int page)
       is_removable    = (is_diggable || is_collectible);
 
       can_replace[xx][yy] =
-       ((change->replace_when == CP_WHEN_EMPTY        && is_empty) ||
-        (change->replace_when == CP_WHEN_WALKABLE     && is_walkable) ||
-        (change->replace_when == CP_WHEN_DIGGABLE     && is_diggable) ||
-        (change->replace_when == CP_WHEN_COLLECTIBLE  && is_collectible) ||
-        (change->replace_when == CP_WHEN_REMOVABLE    && is_removable) ||
-        (change->replace_when == CP_WHEN_DESTRUCTIBLE && is_destructible));
+       (((change->replace_when == CP_WHEN_EMPTY        && is_empty) ||
+         (change->replace_when == CP_WHEN_WALKABLE     && is_walkable) ||
+         (change->replace_when == CP_WHEN_DIGGABLE     && is_diggable) ||
+         (change->replace_when == CP_WHEN_COLLECTIBLE  && is_collectible) ||
+         (change->replace_when == CP_WHEN_REMOVABLE    && is_removable) ||
+         (change->replace_when == CP_WHEN_DESTRUCTIBLE && is_destructible)) &&
+        !(IS_PLAYER(ex, ey) && ELEM_IS_PLAYER(content_element)));
 
       if (!can_replace[xx][yy])
        complete_replace = FALSE;
@@ -8212,6 +8377,45 @@ static void PlayerActions(struct PlayerInfo *player, byte player_action)
 }
 #endif
 
+void AdvanceFrameAndPlayerCounters(int player_nr)
+{
+  int i;
+
+  /* advance frame counters (global frame counter and time frame counter) */
+  FrameCounter++;
+  TimeFrames++;
+
+  /* advance player counters (counters for move delay, move animation etc.) */
+  for (i = 0; i < MAX_PLAYERS; i++)
+  {
+    boolean advance_player_counters = (player_nr == -1 || player_nr == i);
+    int move_frames =
+      MOVE_DELAY_NORMAL_SPEED /  stored_player[i].move_delay_value;
+
+    if (!advance_player_counters)      /* not all players may be affected */
+      continue;
+
+    stored_player[i].Frame += move_frames;
+
+    if (stored_player[i].MovPos != 0)
+      stored_player[i].StepFrame += move_frames;
+
+#if USE_NEW_MOVE_DELAY
+    if (stored_player[i].move_delay > 0)
+      stored_player[i].move_delay--;
+#endif
+
+#if USE_NEW_PUSH_DELAY
+    /* due to bugs in previous versions, counter must count up, not down */
+    if (stored_player[i].push_delay != -1)
+      stored_player[i].push_delay++;
+#endif
+
+    if (stored_player[i].drop_delay > 0)
+      stored_player[i].drop_delay--;
+  }
+}
+
 void GameActions()
 {
   static unsigned long action_delay = 0;
@@ -8453,6 +8657,14 @@ void GameActions()
     Changed[x][y] = CE_BITMASK_DEFAULT;
     ChangeEvent[x][y] = CE_BITMASK_DEFAULT;
 
+    /* this must be handled before main playfield loop */
+    if (Feld[x][y] == EL_PLAYER_IS_LEAVING)
+    {
+      MovDelay[x][y]--;
+      if (MovDelay[x][y] <= 0)
+       RemoveField(x, y);
+    }
+
 #if DEBUG
     if (ChangePage[x][y] != -1 && ChangeDelay[x][y] != 1)
     {
@@ -8903,7 +9115,9 @@ void GameActions()
           stored_player[0].StepFrame);
 #endif
 
-#if 1
+#if USE_NEW_MOVE_DELAY
+  AdvanceFrameAndPlayerCounters(-1);   /* advance counters for all players */
+#else
   FrameCounter++;
   TimeFrames++;
 
@@ -8917,6 +9131,11 @@ void GameActions()
     if (stored_player[i].MovPos != 0)
       stored_player[i].StepFrame += move_frames;
 
+#if USE_NEW_MOVE_DELAY
+    if (stored_player[i].move_delay > 0)
+      stored_player[i].move_delay--;
+#endif
+
     if (stored_player[i].drop_delay > 0)
       stored_player[i].drop_delay--;
   }
@@ -9077,7 +9296,9 @@ static boolean canMoveToValidFieldWithGravity(int x, int y, int move_dir)
 #if 1
   return (IN_LEV_FIELD(newx, newy) && !IS_FREE_OR_PLAYER(newx, newy) &&
          IS_GRAVITY_REACHABLE(Feld[newx][newy]) &&
+#if 0
          (!IS_SP_PORT(Feld[newx][newy]) || move_dir == MV_UP) &&
+#endif
          (IS_DIGGABLE(Feld[newx][newy]) ||
           IS_WALKABLE_FROM(Feld[newx][newy], opposite_dir) ||
           canPassField(newx, newy, move_dir)));
@@ -9394,14 +9615,38 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
 #else
 
 #if 1
+
+#if 0
+  printf("::: %d <= %d < %d ?\n", player->move_delay, FrameCounter,
+        player->move_delay + player->move_delay_value);
+#endif
+
+#if USE_NEW_MOVE_DELAY
+  if (player->move_delay > 0)
+#else
   if (!FrameReached(&player->move_delay, player->move_delay_value))
+#endif
+  {
+#if 0
+    printf("::: can NOT move\n");
+#endif
+
     return FALSE;
+  }
 #else
   if (!FrameReached(&player->move_delay, player->move_delay_value) &&
       !(tape.playing && tape.file_version < FILE_VERSION_2_0))
     return FALSE;
 #endif
 
+#endif
+
+#if 0
+  printf("::: COULD move now\n");
+#endif
+
+#if USE_NEW_MOVE_DELAY
+  player->move_delay = -1;             /* set to "uninitialized" value */
 #endif
 
   /* store if player is automatically moved to next field */
@@ -9429,7 +9674,13 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
     {
       ScrollPlayer(player, SCROLL_GO_ON);
       ScrollScreen(NULL, SCROLL_GO_ON);
+
+#if USE_NEW_MOVE_DELAY
+      AdvanceFrameAndPlayerCounters(player->index_nr);
+#else
       FrameCounter++;
+#endif
+
       DrawAllPlayers();
       BackToFront();
     }
@@ -9533,6 +9784,10 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
 
   if (moved & MF_MOVING)
   {
+#if 0
+    printf("::: REALLY moves now\n");
+#endif
+
     if (old_jx != jx && old_jy == jy)
       player->MovDir = (old_jx < jx ? MV_RIGHT : MV_LEFT);
     else if (old_jx == jx && old_jy != jy)
@@ -9612,8 +9867,22 @@ boolean MovePlayer(struct PlayerInfo *player, int dx, int dy)
     player->last_move_dir = MV_NO_MOVING;
     */
     player->is_moving = FALSE;
+
+#if USE_NEW_MOVE_STYLE
+    /* player is ALLOWED to move, but CANNOT move (something blocks his way) */
+    /* ensure that the player is also allowed to move in the next frame */
+    /* (currently, the player is forced to wait eight frames before he can try
+       again!!!) */
+
+    player->move_delay = 0;    /* allow direct movement in the next frame */
+#endif
   }
 
+#if USE_NEW_MOVE_DELAY
+  if (player->move_delay == -1)                /* not yet initialized by DigField() */
+    player->move_delay = player->move_delay_value;
+#endif
+
   if (game.engine_version < VERSION_IDENT(3,0,7,0))
   {
     TestIfHeroTouchesBadThing(jx, jy);
@@ -9640,8 +9909,27 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
     player->actual_frame_counter = FrameCounter;
     player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
+#if USE_NEW_BLOCK_STYLE
+    if (player->block_delay_value > 0 &&
+       Feld[last_jx][last_jy] == EL_EMPTY)
+    {
+      Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
+#if 1
+      MovDelay[last_jx][last_jy] = player->block_delay_value + 1;
+#else
+      ChangeDelay[last_jx][last_jy] = player->block_last_field_delay;
+#endif
+    }
+#else
+#if USE_NEW_MOVE_STYLE
+    if (player->block_last_field &&
+       Feld[last_jx][last_jy] == EL_EMPTY)
+      Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
+#else
     if (Feld[last_jx][last_jy] == EL_EMPTY)
       Feld[last_jx][last_jy] = EL_PLAYER_IS_LEAVING;
+#endif
+#endif
 
 #if 0
     DrawPlayer(player);
@@ -9655,9 +9943,16 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
   player->MovPos += (player->MovPos > 0 ? -1 : 1) * move_stepsize;
   player->GfxPos = move_stepsize * (player->MovPos / move_stepsize);
 
+#if USE_NEW_BLOCK_STYLE
+#else
   if (!player->block_last_field &&
       Feld[last_jx][last_jy] == EL_PLAYER_IS_LEAVING)
+#if 1
+    RemoveField(last_jx, last_jy);
+#else
     Feld[last_jx][last_jy] = EL_EMPTY;
+#endif
+#endif
 
   /* before DrawPlayer() to draw correct player graphic for this case */
   if (player->MovPos == 0)
@@ -9694,9 +9989,16 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
     }
 #endif
 
+#if USE_NEW_BLOCK_STYLE
+#else
     if (player->block_last_field &&
        Feld[last_jx][last_jy] == EL_PLAYER_IS_LEAVING)
+#if 1
+      RemoveField(last_jx, last_jy);
+#else
       Feld[last_jx][last_jy] = EL_EMPTY;
+#endif
+#endif
 
     player->last_jx = jx;
     player->last_jy = jy;
@@ -9769,7 +10071,12 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
       TestIfHeroTouchesBadThing(jx, jy);
       TestIfPlayerTouchesCustomElement(jx, jy);
 #if 1
-      TestIfElementTouchesCustomElement(jx, jy);       /* for empty space */
+#if 1
+      /* needed because pushed element has not yet reached its destination,
+        so it would trigger a change event at its previous field location */
+      if (!player->is_pushing)
+#endif
+       TestIfElementTouchesCustomElement(jx, jy);      /* for empty space */
 #endif
 
       if (!player->active)
@@ -9956,7 +10263,7 @@ void TestIfElementTouchesCustomElement(int x, int y)
   boolean change_center_element = FALSE;
   int center_element_change_page = 0;
   int center_element = Feld[x][y];     /* should always be non-moving! */
-  int border_trigger_element;
+  int border_trigger_element = EL_UNDEFINED;
   int i, j;
 
   for (i = 0; i < NUM_DIRECTIONS; i++)
@@ -10657,7 +10964,11 @@ int DigField(struct PlayerInfo *player,
     if (mode == DF_NO_PUSH)    /* player just stopped pushing */
     {
       player->is_switching = FALSE;
+#if USE_NEW_PUSH_DELAY
+      player->push_delay = -1;
+#else
       player->push_delay = 0;
+#endif
 
       return MF_NO_ACTION;
     }
@@ -10965,6 +11276,16 @@ int DigField(struct PlayerInfo *player,
              element == EL_SP_GRAVITY_PORT_UP ||
              element == EL_SP_GRAVITY_PORT_DOWN)
            game.gravity = !game.gravity;
+         else if (element == EL_SP_GRAVITY_ON_PORT_LEFT ||
+                  element == EL_SP_GRAVITY_ON_PORT_RIGHT ||
+                  element == EL_SP_GRAVITY_ON_PORT_UP ||
+                  element == EL_SP_GRAVITY_ON_PORT_DOWN)
+           game.gravity = TRUE;
+         else if (element == EL_SP_GRAVITY_OFF_PORT_LEFT ||
+                  element == EL_SP_GRAVITY_OFF_PORT_RIGHT ||
+                  element == EL_SP_GRAVITY_OFF_PORT_UP ||
+                  element == EL_SP_GRAVITY_OFF_PORT_DOWN)
+           game.gravity = FALSE;
        }
 
        /* automatically move to the next field with double speed */
@@ -11210,16 +11531,56 @@ int DigField(struct PlayerInfo *player,
        if (!checkDiagonalPushing(player, x, y, real_dx, real_dy))
          return MF_NO_ACTION;
 
+#if USE_NEW_PUSH_DELAY
+
+#if 0
+       if ( (player->push_delay == -1) != (player->push_delay2 == 0) )
+         printf("::: ALERT: %d, %d [%d / %d]\n",
+                player->push_delay, player->push_delay2,
+                FrameCounter, FrameCounter / 50);
+#endif
+
+       if (player->push_delay == -1)   /* new pushing; restart delay */
+         player->push_delay = 0;
+#else
        if (player->push_delay == 0)    /* new pushing; restart delay */
          player->push_delay = FrameCounter;
+#endif
+
+#if USE_NEW_PUSH_DELAY
+#if 0
+       if ( (player->push_delay > 0) != (!xxx_fr) )
+         printf("::: PUSH BUG! %d, (%d -> %d) %d [%d / %d]\n",
+                player->push_delay,
+                xxx_pdv2, player->push_delay2, player->push_delay_value,
+                FrameCounter, FrameCounter / 50);
+#endif
 
+#if 0
+       if (player->push_delay > 0 &&
+           !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
+           element != EL_SPRING && element != EL_BALLOON)
+#else
+       /* !!! */
+       if (player->push_delay < player->push_delay_value &&
+           !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
+           element != EL_SPRING && element != EL_BALLOON)
+#endif
+
+#else
        if (!FrameReached(&player->push_delay, player->push_delay_value) &&
            !(tape.playing && tape.file_version < FILE_VERSION_2_0) &&
            element != EL_SPRING && element != EL_BALLOON)
+#endif
        {
          /* make sure that there is no move delay before next try to push */
+#if USE_NEW_MOVE_DELAY
+         if (game.engine_version >= VERSION_IDENT(3,0,7,1))
+           player->move_delay = 0;
+#else
          if (game.engine_version >= VERSION_IDENT(3,0,7,1))
            player->move_delay = INITIAL_MOVE_DELAY_OFF;
+#endif
 
          return MF_NO_ACTION;
        }
@@ -11445,7 +11806,11 @@ int DigField(struct PlayerInfo *player,
       return MF_NO_ACTION;
   }
 
+#if USE_NEW_PUSH_DELAY
+  player->push_delay = -1;
+#else
   player->push_delay = 0;
+#endif
 
   if (Feld[x][y] != element)           /* really digged/collected something */
     player->is_collecting = !player->is_digging;
@@ -11709,11 +12074,11 @@ boolean DropElement(struct PlayerInfo *player)
     nexty = dropy + GET_DY_FROM_DIR(move_direction);
 
 #if 1
-      Changed[dropx][dropy] = 0;       /* allow another change */
-      CheckCollision[dropx][dropy] = 2;
+    Changed[dropx][dropy] = 0;         /* allow another change */
+    CheckCollision[dropx][dropy] = 2;
 #else
 
-    if (IN_LEV_FIELD(nextx, nexty) && IS_FREE(nextx, nexty))
+    if (IN_LEV_FIELD_AND_IS_FREE(nextx, nexty))
     {
 #if 0
       WasJustMoving[dropx][dropy] = 3;
@@ -11724,7 +12089,8 @@ boolean DropElement(struct PlayerInfo *player)
 #endif
 #endif
     }
-#if 1
+#if 0
+    /* !!! commented out from 3.1.0-4 to 3.1.0-5 !!! */
     else
     {
       Changed[dropx][dropy] = 0;       /* allow another change */