X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fgame.c;h=7c6b4cff32b706903613c8f86259be98d5aef095;hb=8ace29ddd779d0de44b982dfca8acc1240cb8941;hp=4f3b21efbe945297eb8dda2778220deadcc5e6cc;hpb=efbd589db2977f140135f247cd4aacfe6c546410;p=rocksndiamonds.git

diff --git a/src/game.c b/src/game.c
index 4f3b21ef..7c6b4cff 100644
--- a/src/game.c
+++ b/src/game.c
@@ -41,6 +41,9 @@
 #define USE_STOP_CHANGED_ELEMENTS	(USE_NEW_STUFF		* 1)
 #define USE_ELEMENT_TOUCHING_BUGFIX	(USE_NEW_STUFF		* 1)
 #define USE_NEW_CONTINUOUS_SNAPPING	(USE_NEW_STUFF		* 1)
+#define USE_GFX_RESET_GFX_ANIMATION	(USE_NEW_STUFF		* 1)
+#define USE_BOTH_SWITCHGATE_SWITCHES	(USE_NEW_STUFF		* 1)
+#define USE_PLAYER_GRAVITY		(USE_NEW_STUFF		* 1)
 
 #define USE_QUICKSAND_IMPACT_BUGFIX	(USE_NEW_STUFF		* 0)
 
@@ -363,6 +366,8 @@ void RemovePlayer(struct PlayerInfo *);
 boolean SnapField(struct PlayerInfo *, int, int);
 boolean DropElement(struct PlayerInfo *);
 
+static int getInvisibleActiveFromInvisibleElement(int);
+static int getInvisibleFromInvisibleActiveElement(int);
 
 static struct GadgetInfo *game_gadget[NUM_GAME_BUTTONS];
 
@@ -775,6 +780,7 @@ static int get_move_delay_from_stepsize(int move_stepsize)
 static void SetPlayerMoveSpeed(struct PlayerInfo *player, int move_stepsize,
 			       boolean init_game)
 {
+  int player_nr = player->index_nr;
   int move_delay = get_move_delay_from_stepsize(move_stepsize);
   boolean cannot_move = (move_stepsize == STEPSIZE_NOT_MOVING ? TRUE : FALSE);
 
@@ -786,8 +792,8 @@ static void SetPlayerMoveSpeed(struct PlayerInfo *player, int move_stepsize,
 
   if (init_game)
   {
-    player->move_delay       = game.initial_move_delay;
-    player->move_delay_value = game.initial_move_delay_value;
+    player->move_delay       = game.initial_move_delay[player_nr];
+    player->move_delay_value = game.initial_move_delay_value[player_nr];
 
     player->move_delay_value_next = -1;
 
@@ -1116,16 +1122,26 @@ static void InitField(int x, int y, boolean init_game)
       }
       break;
 
+#if !USE_BOTH_SWITCHGATE_SWITCHES
     case EL_SWITCHGATE_SWITCH_DOWN:	/* always start with same switch pos */
       if (init_game)
 	Feld[x][y] = EL_SWITCHGATE_SWITCH_UP;
       break;
+#endif
 
     case EL_LIGHT_SWITCH_ACTIVE:
       if (init_game)
 	game.light_time_left = level.time_light * FRAMES_PER_SECOND;
       break;
 
+    case EL_INVISIBLE_STEELWALL:
+    case EL_INVISIBLE_WALL:
+    case EL_INVISIBLE_SAND:
+      if (game.light_time_left > 0 ||
+	  game.lenses_time_left > 0)
+        Feld[x][y] = getInvisibleActiveFromInvisibleElement(element);
+      break;
+
     case EL_EMC_MAGIC_BALL:
       if (game.ball_state)
 	Feld[x][y] = EL_EMC_MAGIC_BALL_ACTIVE;
@@ -1236,12 +1252,16 @@ static inline void InitField_WithBug2(int x, int y, boolean init_game)
 
 inline void DrawGameValue_Emeralds(int value)
 {
-  DrawText(DX_EMERALDS, DY_EMERALDS, int2str(value, 3), FONT_TEXT_2);
+  int xpos = (3 * 14 - 3 * getFontWidth(FONT_TEXT_2)) / 2;
+
+  DrawText(DX_EMERALDS + xpos, DY_EMERALDS, int2str(value, 3), FONT_TEXT_2);
 }
 
 inline void DrawGameValue_Dynamite(int value)
 {
-  DrawText(DX_DYNAMITE, DY_DYNAMITE, int2str(value, 3), FONT_TEXT_2);
+  int xpos = (3 * 14 - 3 * getFontWidth(FONT_TEXT_2)) / 2;
+
+  DrawText(DX_DYNAMITE + xpos, DY_DYNAMITE, int2str(value, 3), FONT_TEXT_2);
 }
 
 inline void DrawGameValue_Keys(int key[MAX_NUM_KEYS])
@@ -1267,15 +1287,24 @@ inline void DrawGameValue_Keys(int key[MAX_NUM_KEYS])
 
 inline void DrawGameValue_Score(int value)
 {
-  DrawText(DX_SCORE, DY_SCORE, int2str(value, 5), FONT_TEXT_2);
+  int xpos = (5 * 14 - 5 * getFontWidth(FONT_TEXT_2)) / 2;
+
+  DrawText(DX_SCORE + xpos, DY_SCORE, int2str(value, 5), FONT_TEXT_2);
 }
 
 inline void DrawGameValue_Time(int value)
 {
+  int xpos3 = (3 * 14 - 3 * getFontWidth(FONT_TEXT_2)) / 2;
+  int xpos4 = (4 * 10 - 4 * getFontWidth(FONT_LEVEL_NUMBER)) / 2;
+
+  /* clear background if value just changed its size */
+  if (value == 999 || value == 1000)
+    ClearRectangle(drawto, DX_TIME1, DY_TIME, 14 * 3, 14);
+
   if (value < 1000)
-    DrawText(DX_TIME1, DY_TIME, int2str(value, 3), FONT_TEXT_2);
+    DrawText(DX_TIME1 + xpos3, DY_TIME, int2str(value, 3), FONT_TEXT_2);
   else
-    DrawText(DX_TIME2, DY_TIME, int2str(value, 4), FONT_LEVEL_NUMBER);
+    DrawText(DX_TIME2 + xpos4, DY_TIME, int2str(value, 4), FONT_LEVEL_NUMBER);
 }
 
 inline void DrawGameValue_Level(int value)
@@ -1566,8 +1595,9 @@ static void InitGameEngine()
 
 #if 1
   /* dynamically adjust player properties according to level information */
-  game.initial_move_delay_value =
-    get_move_delay_from_stepsize(level.initial_player_stepsize);
+  for (i = 0; i < MAX_PLAYERS; i++)
+    game.initial_move_delay_value[i] =
+      get_move_delay_from_stepsize(level.initial_player_stepsize[i]);
 #else
   /* dynamically adjust player properties according to level information */
   game.initial_move_delay_value =
@@ -1575,8 +1605,10 @@ static void InitGameEngine()
 #endif
 
   /* 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);
+  for (i = 0; i < MAX_PLAYERS; i++)
+    game.initial_move_delay[i] =
+      (game.engine_version <= VERSION_IDENT(2,0,1,0) ?
+       game.initial_move_delay_value[i] : 0);
 
   /* ---------- initialize player's initial push delay --------------------- */
 
@@ -1937,6 +1969,8 @@ void InitGame()
     player->block_last_field = FALSE;	/* initialized in InitPlayerField() */
     player->block_delay_adjustment = 0;	/* initialized in InitPlayerField() */
 
+    player->gravity = level.initial_player_gravity[i];
+
     player->can_fall_into_acid = CAN_MOVE_INTO_ACID(player->element_nr);
 
     player->actual_frame_counter = 0;
@@ -1992,7 +2026,7 @@ void InitGame()
     player->show_envelope = 0;
 
 #if 1
-    SetPlayerMoveSpeed(player, level.initial_player_stepsize, TRUE);
+    SetPlayerMoveSpeed(player, level.initial_player_stepsize[i], TRUE);
 #else
     player->move_delay       = game.initial_move_delay;
     player->move_delay_value = game.initial_move_delay_value;
@@ -2058,8 +2092,15 @@ void InitGame()
   game.timegate_time_left = 0;
   game.switchgate_pos = 0;
   game.wind_direction = level.wind_direction_initial;
+
+#if !USE_PLAYER_GRAVITY
+#if 1
+  game.gravity = FALSE;
+#else
   game.gravity = level.initial_gravity;
+#endif
   game.explosions_delayed = TRUE;
+#endif
 
   game.lenses_time_left = 0;
   game.magnify_time_left = 0;
@@ -2898,7 +2939,7 @@ int NewHiScore()
 
   LoadScore(level_nr);
 
-  if (strcmp(setup.player_name, EMPTY_PLAYER_NAME) == 0 ||
+  if (strEqual(setup.player_name, EMPTY_PLAYER_NAME) ||
       local_player->score < highscore[MAX_SCORE_ENTRIES - 1].Score) 
     return -1;
 
@@ -2914,7 +2955,7 @@ int NewHiScore()
 
 #ifdef ONE_PER_NAME
 	for (l = k; l < MAX_SCORE_ENTRIES; l++)
-	  if (!strcmp(setup.player_name, highscore[l].Name))
+	  if (strEqual(setup.player_name, highscore[l].Name))
 	    m = l;
 	if (m == k)	/* player's new highscore overwrites his old one */
 	  goto put_into_list;
@@ -2998,10 +3039,26 @@ void InitPlayerGfxAnimation(struct PlayerInfo *player, int action, int dir)
   }
 }
 
-static void ResetRandomAnimationValue(int x, int y)
+#if USE_GFX_RESET_GFX_ANIMATION
+static void ResetGfxFrame(int x, int y, boolean redraw)
 {
-  GfxRandom[x][y] = INIT_GFX_RANDOM();
+  int element = Feld[x][y];
+  int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
+  int last_gfx_frame = GfxFrame[x][y];
+
+  if (graphic_info[graphic].anim_global_sync)
+    GfxFrame[x][y] = FrameCounter;
+  else if (ANIM_MODE(graphic) == ANIM_CE_VALUE)
+    GfxFrame[x][y] = CustomValue[x][y];
+  else if (ANIM_MODE(graphic) == ANIM_CE_SCORE)
+    GfxFrame[x][y] = element_info[element].collect_score;
+  else if (ANIM_MODE(graphic) == ANIM_CE_DELAY)
+    GfxFrame[x][y] = ChangeDelay[x][y];
+
+  if (redraw && GfxFrame[x][y] != last_gfx_frame)
+    DrawLevelGraphicAnimation(x, y, graphic);
 }
+#endif
 
 static void ResetGfxAnimation(int x, int y)
 {
@@ -3009,9 +3066,9 @@ static void ResetGfxAnimation(int x, int y)
   int element, graphic;
 #endif
 
-  GfxFrame[x][y] = 0;
   GfxAction[x][y] = ACTION_DEFAULT;
   GfxDir[x][y] = MovDir[x][y];
+  GfxFrame[x][y] = 0;
 
 #if 0
   element = Feld[x][y];
@@ -3023,9 +3080,20 @@ static void ResetGfxAnimation(int x, int y)
     GfxFrame[x][y] = CustomValue[x][y];
   else if (ANIM_MODE(graphic) == ANIM_CE_SCORE)
     GfxFrame[x][y] = element_info[element].collect_score;
+  else if (ANIM_MODE(graphic) == ANIM_CE_DELAY)
+    GfxFrame[x][y] = ChangeDelay[x][y];
+#endif
+
+#if USE_GFX_RESET_GFX_ANIMATION
+  ResetGfxFrame(x, y, FALSE);
 #endif
 }
 
+static void ResetRandomAnimationValue(int x, int y)
+{
+  GfxRandom[x][y] = INIT_GFX_RANDOM();
+}
+
 void InitMovingField(int x, int y, int direction)
 {
   int element = Feld[x][y];
@@ -3054,6 +3122,8 @@ void InitMovingField(int x, int y, int direction)
     GfxFrame[x][y] = CustomValue[x][y];
   else if (ANIM_MODE(graphic) == ANIM_CE_SCORE)
     GfxFrame[x][y] = element_info[element].collect_score;
+  else if (ANIM_MODE(graphic) == ANIM_CE_DELAY)
+    GfxFrame[x][y] = ChangeDelay[x][y];
 #endif
 
   /* this is needed for CEs with property "can move" / "not moving" */
@@ -4372,12 +4442,25 @@ static void ToggleSwitchgateSwitch(int x, int y)
   {
     int element = Feld[xx][yy];
 
+#if !USE_BOTH_SWITCHGATE_SWITCHES
     if (element == EL_SWITCHGATE_SWITCH_UP ||
 	element == EL_SWITCHGATE_SWITCH_DOWN)
     {
       Feld[xx][yy] = EL_SWITCHGATE_SWITCH_UP + game.switchgate_pos;
       DrawLevelField(xx, yy);
     }
+#else
+    if (element == EL_SWITCHGATE_SWITCH_UP)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_SWITCH_DOWN;
+      DrawLevelField(xx, yy);
+    }
+    else if (element == EL_SWITCHGATE_SWITCH_DOWN)
+    {
+      Feld[xx][yy] = EL_SWITCHGATE_SWITCH_UP;
+      DrawLevelField(xx, yy);
+    }
+#endif
     else if (element == EL_SWITCHGATE_OPEN ||
 	     element == EL_SWITCHGATE_OPENING)
     {
@@ -5683,7 +5766,7 @@ inline static void TurnRoundExt(int x, int y)
 static void TurnRound(int x, int y)
 {
   int direction = MovDir[x][y];
-#if 1
+#if 0
   int element, graphic;
 #endif
 
@@ -5698,6 +5781,8 @@ static void TurnRound(int x, int y)
     GfxAction[x][y] = ACTION_TURNING_FROM_LEFT + MV_DIR_TO_BIT(direction);
 
 #if 1
+  ResetGfxFrame(x, y, FALSE);
+#else
   element = Feld[x][y];
   graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
 
@@ -5707,6 +5792,8 @@ static void TurnRound(int x, int y)
     GfxFrame[x][y] = CustomValue[x][y];
   else if (ANIM_MODE(graphic) == ANIM_CE_SCORE)
     GfxFrame[x][y] = element_info[element].collect_score;
+  else if (ANIM_MODE(graphic) == ANIM_CE_DELAY)
+    GfxFrame[x][y] = ChangeDelay[x][y];
 #endif
 }
 
@@ -7926,7 +8013,7 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
      CA_ARG_MAX);
 
   int action_arg_number_reset =
-    (action_type == CA_SET_PLAYER_SPEED ? level.initial_player_stepsize :
+    (action_type == CA_SET_PLAYER_SPEED ? level.initial_player_stepsize[0] :
      action_type == CA_SET_LEVEL_GEMS ? level.gems_needed :
      action_type == CA_SET_LEVEL_TIME ? level.time :
      action_type == CA_SET_LEVEL_SCORE ? 0 :
@@ -8052,6 +8139,7 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
       break;
     }
 
+#if !USE_PLAYER_GRAVITY
     case CA_SET_LEVEL_GRAVITY:
     {
       game.gravity = (action_arg == CA_ARG_GRAVITY_OFF    ? FALSE         :
@@ -8060,6 +8148,7 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
 		      game.gravity);
       break;
     }
+#endif
 
     case CA_SET_LEVEL_WIND:
     {
@@ -8146,6 +8235,10 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
 	    action_mode = (action_arg == CA_ARG_SPEED_SLOWER ? CA_MODE_DIVIDE :
 			   CA_MODE_MULTIPLY);
 	  }
+	  else if (action_arg == CA_ARG_NUMBER_RESET)
+	  {
+	    action_arg_number = level.initial_player_stepsize[i];
+	  }
 
 	  move_stepsize =
 	    getModifiedActionNumber(move_stepsize,
@@ -8198,6 +8291,25 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
       break;
     }
 
+#if USE_PLAYER_GRAVITY
+    case CA_SET_PLAYER_GRAVITY:
+    {
+      for (i = 0; i < MAX_PLAYERS; i++)
+      {
+	if (trigger_player_bits & (1 << i))
+	{
+	  stored_player[i].gravity =
+	    (action_arg == CA_ARG_GRAVITY_OFF    ? FALSE                     :
+	     action_arg == CA_ARG_GRAVITY_ON     ? TRUE                      :
+	     action_arg == CA_ARG_GRAVITY_TOGGLE ? !stored_player[i].gravity :
+	     stored_player[i].gravity);
+	}
+      }
+
+      break;
+    }
+#endif
+
     case CA_SET_PLAYER_ARTWORK:
     {
       for (i = 0; i < MAX_PLAYERS; i++)
@@ -8233,27 +8345,34 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
     case CA_SET_CE_VALUE:
     {
 #if USE_NEW_CUSTOM_VALUE
-      int last_custom_value = CustomValue[x][y];
+      int last_ce_value = CustomValue[x][y];
 
       CustomValue[x][y] = action_arg_number_new;
 
 #if 0
-      printf("::: Count == %d\n", CustomValue[x][y]);
+      printf("::: CE value == %d\n", CustomValue[x][y]);
 #endif
 
-      if (CustomValue[x][y] == 0 && last_custom_value > 0)
+      if (CustomValue[x][y] != last_ce_value)
       {
+	CheckElementChange(x, y, element, EL_UNDEFINED, CE_VALUE_CHANGES);
+	CheckTriggeredElementChange(x, y, element, CE_VALUE_CHANGES_OF_X);
+
+	if (CustomValue[x][y] == 0)
+	{
 #if 0
-	printf("::: CE_VALUE_GETS_ZERO\n");
+	  printf("::: CE_VALUE_GETS_ZERO\n");
 #endif
 
-	CheckElementChange(x, y, element, EL_UNDEFINED, CE_VALUE_GETS_ZERO);
-	CheckTriggeredElementChange(x, y, element, CE_VALUE_GETS_ZERO_OF_X);
+	  CheckElementChange(x, y, element, EL_UNDEFINED, CE_VALUE_GETS_ZERO);
+	  CheckTriggeredElementChange(x, y, element, CE_VALUE_GETS_ZERO_OF_X);
 
 #if 0
-	printf("::: RESULT: %d, %d\n", Feld[x][y], ChangePage[x][y]);
+	  printf("::: RESULT: %d, %d\n", Feld[x][y], ChangePage[x][y]);
 #endif
+	}
       }
+
 #endif
 
       break;
@@ -8261,8 +8380,37 @@ static void ExecuteCustomElementAction(int x, int y, int element, int page)
 
     case CA_SET_CE_SCORE:
     {
+#if USE_NEW_CUSTOM_VALUE
+      int last_ce_score = ei->collect_score;
+
       ei->collect_score = action_arg_number_new;
 
+#if 0
+      printf("::: CE score == %d\n", ei->collect_score);
+#endif
+
+      if (ei->collect_score != last_ce_score)
+      {
+	CheckElementChange(x, y, element, EL_UNDEFINED, CE_SCORE_CHANGES);
+	CheckTriggeredElementChange(x, y, element, CE_SCORE_CHANGES_OF_X);
+
+	if (ei->collect_score == 0)
+	{
+#if 0
+	  printf("::: CE_SCORE_GETS_ZERO\n");
+#endif
+
+	  CheckElementChange(x, y, element, EL_UNDEFINED, CE_SCORE_GETS_ZERO);
+	  CheckTriggeredElementChange(x, y, element, CE_SCORE_GETS_ZERO_OF_X);
+
+#if 0
+	  printf("::: RESULT: %d, %d\n", Feld[x][y], ChangePage[x][y]);
+#endif
+	}
+      }
+
+#endif
+
       break;
     }
 
@@ -8292,7 +8440,7 @@ static void CreateFieldExt(int x, int y, int element, boolean is_change)
 			IS_WALKABLE(old_element));
 
 #if 0
-  /* check if element under player changes from accessible to unaccessible
+  /* check if element under the player changes from accessible to unaccessible
      (needed for special case of dropping element which then changes) */
   if (IS_PLAYER(x, y) && !PLAYER_EXPLOSION_PROTECTED(x, y) &&
       IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
@@ -8312,8 +8460,10 @@ static void CreateFieldExt(int x, int y, int element, boolean is_change)
 
     Feld[x][y] = new_element;
 
+#if !USE_GFX_RESET_GFX_ANIMATION
     ResetGfxAnimation(x, y);
     ResetRandomAnimationValue(x, y);
+#endif
 
     if (element_info[new_element].move_direction_initial == MV_START_PREVIOUS)
       MovDir[x][y] = previous_move_direction;
@@ -8327,6 +8477,11 @@ static void CreateFieldExt(int x, int y, int element, boolean is_change)
 
     new_element = Feld[x][y];	/* element may have changed */
 
+#if USE_GFX_RESET_GFX_ANIMATION
+    ResetGfxAnimation(x, y);
+    ResetRandomAnimationValue(x, y);
+#endif
+
     DrawLevelField(x, y);
 
     if (GFX_CRUMBLED(new_element))
@@ -8334,8 +8489,9 @@ static void CreateFieldExt(int x, int y, int element, boolean is_change)
   }
 
 #if 1
-  /* check if element under player changes from accessible to unaccessible
+  /* check if element under the player changes from accessible to unaccessible
      (needed for special case of dropping element which then changes) */
+  /* (must be checked after creating new element for walkable group elements) */
   if (IS_PLAYER(x, y) && !PLAYER_EXPLOSION_PROTECTED(x, y) &&
       IS_ACCESSIBLE(old_element) && !IS_ACCESSIBLE(new_element))
   {
@@ -9699,6 +9855,9 @@ void GameActions_RND()
       printf("::: Yo man! Rocks can fall!\n");
 #endif
 
+#if 1
+    ResetGfxFrame(x, y, TRUE);
+#else
     if (graphic_info[graphic].anim_global_sync)
       GfxFrame[x][y] = FrameCounter;
     else if (ANIM_MODE(graphic) == ANIM_CE_VALUE)
@@ -9723,6 +9882,18 @@ void GameActions_RND()
 #endif
 	DrawLevelGraphicAnimation(x, y, graphic);
     }
+    else if (ANIM_MODE(graphic) == ANIM_CE_DELAY)
+    {
+      int old_gfx_frame = GfxFrame[x][y];
+
+      GfxFrame[x][y] = ChangeDelay[x][y];
+
+#if 1
+      if (GfxFrame[x][y] != old_gfx_frame)
+#endif
+	DrawLevelGraphicAnimation(x, y, graphic);
+    }
+#endif
 
     if (ANIM_MODE(graphic) == ANIM_RANDOM &&
 	IS_NEXT_FRAME(GfxFrame[x][y], graphic))
@@ -10169,7 +10340,11 @@ static boolean canMoveToValidFieldWithGravity(int x, int y, int move_dir)
 
 static void CheckGravityMovement(struct PlayerInfo *player)
 {
+#if USE_PLAYER_GRAVITY
+  if (player->gravity && !player->programmed_action)
+#else
   if (game.gravity && !player->programmed_action)
+#endif
   {
     int move_dir_horizontal = player->effective_action & MV_HORIZONTAL;
     int move_dir_vertical   = player->effective_action & MV_VERTICAL;
@@ -10191,7 +10366,11 @@ static void CheckGravityMovementWhenNotMoving(struct PlayerInfo *player)
 {
   return CheckGravityMovement(player);
 
+#if USE_PLAYER_GRAVITY
+  if (player->gravity && !player->programmed_action)
+#else
   if (game.gravity && !player->programmed_action)
+#endif
   {
     int jx = player->jx, jy = player->jy;
     boolean field_under_player_is_free =
@@ -10574,8 +10753,13 @@ void ScrollPlayer(struct PlayerInfo *player, int mode)
 	last_field_block_delay += player->move_delay_value;
 
 	/* when blocking enabled, prevent moving up despite gravity */
+#if USE_PLAYER_GRAVITY
+	if (player->gravity && player->MovDir == MV_UP)
+	  block_delay_adjustment = -1;
+#else
 	if (game.gravity && player->MovDir == MV_UP)
 	  block_delay_adjustment = -1;
+#endif
       }
 
       /* add block delay adjustment (also possible when not blocking) */
@@ -11603,10 +11787,17 @@ int DigField(struct PlayerInfo *player,
     return MP_NO_ACTION;
   }
 
+#if USE_PLAYER_GRAVITY
+  if (player->gravity && is_player && !player->is_auto_moving &&
+      canFallDown(player) && move_direction != MV_DOWN &&
+      !canMoveToValidFieldWithGravity(jx, jy, move_direction))
+    return MP_NO_ACTION;	/* player cannot walk here due to gravity */
+#else
   if (game.gravity && is_player && !player->is_auto_moving &&
       canFallDown(player) && move_direction != MV_DOWN &&
       !canMoveToValidFieldWithGravity(jx, jy, move_direction))
     return MP_NO_ACTION;	/* player cannot walk here due to gravity */
+#endif
 
   if (player_can_move &&
       IS_WALKABLE(element) && ACCESS_FROM(element, opposite_direction))
@@ -11670,23 +11861,50 @@ int DigField(struct PlayerInfo *player,
       if (!player->key[EM_GATE_GRAY_ACTIVE_NR(element)])
 	return MP_NO_ACTION;
     }
+    else if (IS_EMC_GATE(element))
+    {
+      if (!player->key[EMC_GATE_NR(element)])
+	return MP_NO_ACTION;
+    }
+    else if (IS_EMC_GATE_GRAY(element))
+    {
+      if (!player->key[EMC_GATE_GRAY_NR(element)])
+	return MP_NO_ACTION;
+    }
+    else if (IS_EMC_GATE_GRAY_ACTIVE(element))
+    {
+      if (!player->key[EMC_GATE_GRAY_ACTIVE_NR(element)])
+	return MP_NO_ACTION;
+    }
     else if (IS_SP_PORT(element))
     {
       if (element == EL_SP_GRAVITY_PORT_LEFT ||
 	  element == EL_SP_GRAVITY_PORT_RIGHT ||
 	  element == EL_SP_GRAVITY_PORT_UP ||
 	  element == EL_SP_GRAVITY_PORT_DOWN)
+#if USE_PLAYER_GRAVITY
+	player->gravity = !player->gravity;
+#else
 	game.gravity = !game.gravity;
+#endif
       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)
+#if USE_PLAYER_GRAVITY
+	player->gravity = TRUE;
+#else
 	game.gravity = TRUE;
+#endif
       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)
+#if USE_PLAYER_GRAVITY
+	player->gravity = FALSE;
+#else
 	game.gravity = FALSE;
+#endif
     }
 
     /* automatically move to the next field with double speed */