added emulation of Final Doom's teleporter z glitch and activate it f…

…or Saturnia MAP10

src/d_main.cpp

@@ -712,6 +712,8 @@ CVAR (Flag, compat_railing,				compatflags2, COMPATF2_RAILING);
 CVAR (Flag, compat_avoidhazard,			compatflags2, COMPATF2_AVOID_HAZARDS);
 CVAR (Flag, compat_stayonlift,			compatflags2, COMPATF2_STAYONLIFT);
 CVAR (Flag, compat_nombf21,				compatflags2, COMPATF2_NOMBF21);
+CVAR (Flag, compat_voodoozombies,		compatflags2, COMPATF2_VOODOO_ZOMBIES);
+CVAR (Flag, compat_fdteleport,			compatflags2, COMPATF2_FDTELEPORT);
 
 CVAR(Bool, vid_activeinbackground, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 

src/doomdef.h

@@ -241,6 +241,7 @@ enum : unsigned int
 	COMPATF2_STAYONLIFT		= 1 << 13,	// yet another MBF thing.
 	COMPATF2_NOMBF21		= 1 << 14,	// disable MBF21 features that may clash with certain maps
 	COMPATF2_VOODOO_ZOMBIES = 1 << 15,	// [RL0] allow playerinfo, playerpawn, and voodoo health to all be different, and skip killing the player's mobj if a voodoo doll dies to allow voodoo zombies
+	COMPATF2_FDTELEPORT		= 1 << 16,	// Emulate Final Doom's teleporter z glitch.
 
 };
 

src/maploader/compatibility.cpp

@@ -173,6 +173,7 @@ static FCompatOption Options[] =
 	{ "scriptwait",				COMPATF2_SCRIPTWAIT, SLOT_COMPAT2 },
 	{ "nombf21",				COMPATF2_NOMBF21, SLOT_COMPAT2 },
 	{ "voodoozombies",			COMPATF2_VOODOO_ZOMBIES, SLOT_COMPAT2 },
+	{ "fdteleport",				COMPATF2_FDTELEPORT, SLOT_COMPAT2 },
 	{ NULL, 0, 0 }
 };
 

src/playsim/p_lnspec.cpp

@@ -1120,7 +1120,7 @@ FUNC(LS_Teleport_NewMap)
 FUNC(LS_Teleport)
 // Teleport (tid, sectortag, bNoSourceFog)
 {
-	int flags = TELF_DESTFOG;
+	int flags = TELF_DESTFOG | TELF_FDCOMPAT;
 	if (!arg2)
 	{
 		flags |= TELF_SOURCEFOG;

src/playsim/p_spec.h

@@ -141,6 +141,7 @@ enum
 	TELF_KEEPHEIGHT			= 16,
 	TELF_ROTATEBOOM			= 32,
 	TELF_ROTATEBOOMINVERSE	= 64,
+	TELF_FDCOMPAT			= 128,
 };
 
 //Spawns teleport fog. Pass the actor to pluck TeleFogFromType and TeleFogToType. 'from' determines if this is the fog to spawn at the old position (true) or new (false).

src/playsim/p_teleport.cpp

@@ -128,7 +128,15 @@ bool P_Teleport (AActor *thing, DVector3 pos, DAngle angle, int flags)
 			}
 			else
 			{
-				pos.Z = floorheight;
+				if (!(thing->Level->i_compatflags2 & COMPATF2_FDTELEPORT) || !(flags & TELF_FDCOMPAT) || floorheight > thing->Z())
+				{
+					pos.Z = floorheight;
+				}
+				else
+				{
+					pos.Z = thing->Z();
+				}
+
 				if (!(flags & TELF_KEEPORIENTATION))
 				{
 					resetpitch = false;
@@ -145,7 +153,16 @@ bool P_Teleport (AActor *thing, DVector3 pos, DAngle angle, int flags)
 		}
 		else
 		{
-			pos.Z = floorheight;
+			// emulation of Final Doom's teleport glitch.
+			// For walking monsters we still have to force them to the ground because the handling of off-ground monsters is different from vanilla.
+			if (!(thing->Level->i_compatflags2 & COMPATF2_FDTELEPORT) || !(flags & TELF_FDCOMPAT) || !(thing->flags & MF_NOGRAVITY) || floorheight > pos.Z)
+			{
+				pos.Z = floorheight;
+			}
+			else
+			{
+				pos.Z = thing->Z();
+			}
 		}
 	}
 	// [MK] notify thing of incoming teleport, check for an early cancel
@@ -245,7 +262,7 @@ DEFINE_ACTION_FUNCTION(AActor, Teleport)
 	PARAM_FLOAT(z);
 	PARAM_ANGLE(an);
 	PARAM_INT(flags);
-	ACTION_RETURN_BOOL(P_Teleport(self, DVector3(x, y, z), an, flags));
+	ACTION_RETURN_BOOL(P_Teleport(self, DVector3(x, y, z), an, flags & ~TELF_FDCOMPAT));
 }
 
 //-----------------------------------------------------------------------------

wadsrc/static/compatibility.txt

@@ -332,3 +332,8 @@ F1EB6927F53047F219A54997DAD9DC81 // mm2.wad map20
 	rebuildnodes
 	trace
 }
+
+BA2247ED1465C8107192AC4215B2A5F3 // saturnia.wad map10
+{
+	fdteleport
+}

wadsrc/static/menudef.txt

@@ -1758,6 +1758,7 @@ OptionMenu "CompatActorMenu" protected
 	Option "$CMPTMNU_INVISIBILITY",					"compat_INVISIBILITY", "YesNo"
 	Option "$CMPTMNU_MINOTAUR",						"compat_MINOTAUR", "YesNo"
 	Option "$CMPTMNU_NOTOSSDROPS",					"compat_NOTOSSDROPS", "YesNo"
+	Option "$CMPTMNU_VOODOOZOMBIES",				"compat_voodoozombies", "YesNo"
 	Class "CompatibilityMenu"
 }
 
@@ -1784,6 +1785,7 @@ OptionMenu "CompatMapMenu" protected
 	Option "$CMPTMNU_POINTONLINE",					"compat_pointonline", "YesNo"
 	Option "$CMPTMNU_MULTIEXIT",					"compat_multiexit", "YesNo"
 	Option "$CMPTMNU_TELEPORT",						"compat_teleport", "YesNo"
+	Option "$CMPTMNU_FDTELEPORT",					"compat_fdteleport", "YesNo"
 	Option "$CMPTMNU_PUSHWINDOW",					"compat_pushwindow", "YesNo"
 	Option "$CMPTMNU_CHECKSWITCHRANGE",				"compat_checkswitchrange", "YesNo"
 	Option "$CMPTMNU_RAILINGHACK",					"compat_railing", "YesNo"