- added a hidden compatiblity option for maps that fell victim to the broken destination search code in some 2.0.9x versions

SVN r3008 (trunk)

src/compatibility.cpp

@@ -89,6 +89,7 @@ static FCompatOption Options[] =
 	{ "setslopeoverflow",		0, BCOMPATF_SETSLOPEOVERFLOW },
 	{ "resetplayerspeed",		0, BCOMPATF_RESETPLAYERSPEED },
 	{ "vileghosts",				0, BCOMPATF_VILEGHOSTS },
+	{ "ignoreteleporttags",		0, BCOMPATF_BADTELEPORTERS },
 
 	// list copied from g_mapinfo.cpp
 	{ "shorttex",				COMPATF_SHORTTEX, 0 },

src/doomdef.h

@@ -341,6 +341,7 @@ enum
 	BCOMPATF_SETSLOPEOVERFLOW	= 1 << 0,	// SetSlope things can overflow
 	BCOMPATF_RESETPLAYERSPEED	= 1 << 1,	// Set player speed to 1.0 when changing maps
 	BCOMPATF_VILEGHOSTS			= 1 << 2,	// Monsters' radius and height aren't restored properly when resurrected.
+	BCOMPATF_BADTELEPORTERS		= 1 << 3,	// Ignore tags on Teleport specials
 };
 
 // phares 3/20/98:

src/p_teleport.cpp

@@ -228,6 +228,9 @@ static AActor *SelectTeleDest (int tid, int tag)
 	// behavior is used instead (return the first teleport dest found in a tagged
 	// sector).
 
+	// Compatibility hack for some maps that fell victim to a bug in the teleport code in 2.0.9x
+	if (ib_compatflags & BCOMPATF_BADTELEPORTERS) tag = 0;
+
 	if (tid != 0)
 	{
 		NActorIterator iterator (NAME_TeleportDest, tid);

wadsrc/static/compatibility.txt

@@ -135,3 +135,7 @@ DCE862393CAAA6FF1294FB7056B53057 // UAC Ultra map07: Contains a scroller dependi
 	setlinespecial 391 Sector_CopyScroller 99 6 0 0 0
 }
 
+1D9E43988940CCD3555724E15DD8B1AB // Happy Time Circus map01 has bad teleporters
+{
+	ignoreteleporttags
+}