X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fgame.c;h=e22a7367d4e296ffc6a0975c2723db1eed6dbdcc;hb=5d264f3e98c7e526922ea961b85d558246fa14f4;hp=504e2d89cf341a2075fb0ed7181bc28c3a87a9e8;hpb=543cccf0bf7339f16c7d40276ce87114a4b99f39;p=rocksndiamonds.git

diff --git a/src/game.c b/src/game.c
index 504e2d89..e22a7367 100644
--- a/src/game.c
+++ b/src/game.c
@@ -2844,6 +2844,67 @@ static void InitGameEngine(void)
   // set flags for bugs and changes according to active game engine version
   // --------------------------------------------------------------------------
 
+  /*
+    Summary of bugfix:
+    Fixed property "can fall" for run-time element "EL_AMOEBA_DROPPING"
+
+    Bug was introduced in version:
+    2.0.1
+
+    Bug was fixed in version:
+    4.1.4.2
+
+    Description:
+    In version 2.0.1, a new run-time element "EL_AMOEBA_DROPPING" was added,
+    but the property "can fall" was missing, which caused some levels to be
+    unsolvable. This was fixed in version 4.1.4.2.
+
+    Affected levels/tapes:
+    An example for a tape that was fixed by this bugfix is tape 029 from the
+    level set "rnd_sam_bateman".
+    The wrong behaviour will still be used for all levels or tapes that were
+    created/recorded with it. An example for this is tape 023 from the level
+    set "rnd_gerhard_haeusler", which was recorded with a buggy game engine.
+  */
+
+  boolean use_amoeba_dropping_cannot_fall_bug =
+    ((game.engine_version >= VERSION_IDENT(2,0,1,0) &&
+      game.engine_version <= VERSION_IDENT(4,1,4,1)) ||
+     (tape.playing &&
+      tape.game_version >= VERSION_IDENT(2,0,1,0) &&
+      tape.game_version <= VERSION_IDENT(4,1,4,1)));
+
+  /*
+    Summary of bugfix/change:
+    Fixed move speed of elements entering or leaving magic wall.
+
+    Fixed/changed in version:
+    2.0.1
+
+    Description:
+    Before 2.0.1, move speed of elements entering or leaving magic wall was
+    twice as fast as it is now.
+    Since 2.0.1, this is set to a lower value by using move_stepsize_list[].
+
+    Affected levels/tapes:
+    The first condition is generally needed for all levels/tapes before version
+    2.0.1, which might use the old behaviour before it was changed; known tapes
+    that are affected: Tape 014 from the level set "rnd_conor_mancone".
+    The second condition is an exception from the above case and is needed for
+    the special case of tapes recorded with game (not engine!) version 2.0.1 or
+    above, but before it was known that this change would break tapes like the
+    above and was fixed in 4.1.4.2, so that the changed behaviour was active
+    although the engine version while recording maybe was before 2.0.1. There
+    are a lot of tapes that are affected by this exception, like tape 006 from
+    the level set "rnd_conor_mancone".
+  */
+
+  boolean use_old_move_stepsize_for_magic_wall =
+    (game.engine_version < VERSION_IDENT(2,0,1,0) &&
+     !(tape.playing &&
+       tape.game_version >= VERSION_IDENT(2,0,1,0) &&
+       tape.game_version <  VERSION_IDENT(4,1,4,2)));
+
   /*
     Summary of bugfix/change:
     Fixed handling for custom elements that change when pushed by the player.
@@ -2928,6 +2989,12 @@ static void InitGameEngine(void)
   // dynamically adjust element properties according to game engine version
   InitElementPropertiesEngine(game.engine_version);
 
+  // ---------- initialize special element properties -------------------------
+
+  // "EL_AMOEBA_DROPPING" missed property "can fall" between 2.0.1 and 4.1.4.1
+  if (use_amoeba_dropping_cannot_fall_bug)
+    SET_PROPERTY(EL_AMOEBA_DROPPING, EP_CAN_FALL, FALSE);
+
 #if 0
   printf("level %d: level version == %06d\n", level_nr, level.game_version);
   printf("          tape version == %06d [%s] [file: %06d]\n",
@@ -3181,6 +3248,16 @@ static void InitGameEngine(void)
     int e = move_stepsize_list[i].element;
 
     element_info[e].move_stepsize = move_stepsize_list[i].move_stepsize;
+
+    // set move stepsize value for certain elements for older engine versions
+    if (use_old_move_stepsize_for_magic_wall)
+    {
+      if (e == EL_MAGIC_WALL_FILLING ||
+	  e == EL_MAGIC_WALL_EMPTYING ||
+	  e == EL_BD_MAGIC_WALL_FILLING ||
+	  e == EL_BD_MAGIC_WALL_EMPTYING)
+	element_info[e].move_stepsize *= 2;
+    }
   }
 
   // ---------- initialize collect score --------------------------------------