- added A_Explode compatibility options.

There are two options here - one only disables the vertical thrust and the other goes back fully to the original non-z-aware code.
Both options are settable through MAPINFO.
For the compatibility presets, the normal ones only disable the vertical thrust, the strict ones force use of the old code entirely.

src/d_main.cpp

@@ -563,22 +563,23 @@ CUSTOM_CVAR(Int, compatmode, 0, CVAR_ARCHIVE|CVAR_NOINITCALL)
 		break;
 
 	case 1:	// Doom2.exe compatible with a few relaxed settings
-		v = COMPATF_SHORTTEX|COMPATF_STAIRINDEX|COMPATF_USEBLOCKING|COMPATF_NODOORLIGHT|COMPATF_SPRITESORT|
+		v = COMPATF_SHORTTEX | COMPATF_STAIRINDEX | COMPATF_USEBLOCKING | COMPATF_NODOORLIGHT | COMPATF_SPRITESORT |
-			COMPATF_TRACE|COMPATF_MISSILECLIP|COMPATF_SOUNDTARGET|COMPATF_DEHHEALTH|COMPATF_CROSSDROPOFF|
+			COMPATF_TRACE | COMPATF_MISSILECLIP | COMPATF_SOUNDTARGET | COMPATF_DEHHEALTH | COMPATF_CROSSDROPOFF |
-			COMPATF_LIGHT|COMPATF_MASKEDMIDTEX;
+			COMPATF_LIGHT | COMPATF_MASKEDMIDTEX;
-		w= COMPATF2_FLOORMOVE;
+		w = COMPATF2_FLOORMOVE | COMPATF2_EXPLODE1;
 		break;
 
 	case 2:	// same as 1 but stricter (NO_PASSMOBJ and INVISIBILITY are also set)
-		v = COMPATF_SHORTTEX|COMPATF_STAIRINDEX|COMPATF_USEBLOCKING|COMPATF_NODOORLIGHT|COMPATF_SPRITESORT|
+		v = COMPATF_SHORTTEX | COMPATF_STAIRINDEX | COMPATF_USEBLOCKING | COMPATF_NODOORLIGHT | COMPATF_SPRITESORT |
-			COMPATF_TRACE|COMPATF_MISSILECLIP|COMPATF_SOUNDTARGET|COMPATF_NO_PASSMOBJ|COMPATF_LIMITPAIN|
+			COMPATF_TRACE | COMPATF_MISSILECLIP | COMPATF_SOUNDTARGET | COMPATF_NO_PASSMOBJ | COMPATF_LIMITPAIN |
-			COMPATF_DEHHEALTH|COMPATF_INVISIBILITY|COMPATF_CROSSDROPOFF|COMPATF_CORPSEGIBS|COMPATF_HITSCAN|
+			COMPATF_DEHHEALTH | COMPATF_INVISIBILITY | COMPATF_CROSSDROPOFF | COMPATF_CORPSEGIBS | COMPATF_HITSCAN |
-			COMPATF_WALLRUN|COMPATF_NOTOSSDROPS|COMPATF_LIGHT|COMPATF_MASKEDMIDTEX;
+			COMPATF_WALLRUN | COMPATF_NOTOSSDROPS | COMPATF_LIGHT | COMPATF_MASKEDMIDTEX;
-		w = COMPATF2_BADANGLES|COMPATF2_FLOORMOVE|COMPATF2_POINTONLINE;
+		w = COMPATF2_BADANGLES | COMPATF2_FLOORMOVE | COMPATF2_POINTONLINE | COMPATF2_EXPLODE2;
 		break;
 
 	case 3: // Boom compat mode
 		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MISSILECLIP|COMPATF_MASKEDMIDTEX;
+		w = COMPATF2_EXPLODE1;
 		break;
 
 	case 4: // Old ZDoom compat mode
@@ -587,14 +588,15 @@ CUSTOM_CVAR(Int, compatmode, 0, CVAR_ARCHIVE|CVAR_NOINITCALL)
 		break;
 
 	case 5: // MBF compat mode
-		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MISSILECLIP|COMPATF_MUSHROOM|
+		v = COMPATF_TRACE | COMPATF_SOUNDTARGET | COMPATF_BOOMSCROLL | COMPATF_MISSILECLIP | COMPATF_MUSHROOM |
-			COMPATF_MBFMONSTERMOVE|COMPATF_NOBLOCKFRIENDS|COMPATF_MASKEDMIDTEX;
+			COMPATF_MBFMONSTERMOVE | COMPATF_NOBLOCKFRIENDS | COMPATF_MASKEDMIDTEX;
+		w = COMPATF2_EXPLODE1;
 		break;
 
 	case 6:	// Boom with some added settings to reenable some 'broken' behavior
-		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MISSILECLIP|COMPATF_NO_PASSMOBJ|
+		v = COMPATF_TRACE | COMPATF_SOUNDTARGET | COMPATF_BOOMSCROLL | COMPATF_MISSILECLIP | COMPATF_NO_PASSMOBJ |
-			COMPATF_INVISIBILITY|COMPATF_CORPSEGIBS|COMPATF_HITSCAN|COMPATF_WALLRUN|COMPATF_NOTOSSDROPS|COMPATF_MASKEDMIDTEX;
+			COMPATF_INVISIBILITY | COMPATF_CORPSEGIBS | COMPATF_HITSCAN | COMPATF_WALLRUN | COMPATF_NOTOSSDROPS | COMPATF_MASKEDMIDTEX;
-		w = COMPATF2_POINTONLINE;
+		w = COMPATF2_POINTONLINE | COMPATF2_EXPLODE2;
 		break;
 
 	}
@@ -642,6 +644,8 @@ CVAR (Flag, compat_multiexit,			compatflags2, COMPATF2_MULTIEXIT);
 CVAR (Flag, compat_teleport,			compatflags2, COMPATF2_TELEPORT);
 CVAR (Flag, compat_pushwindow,			compatflags2, COMPATF2_PUSHWINDOW);
 CVAR (Flag, compat_checkswitchrange,	compatflags2, COMPATF2_CHECKSWITCHRANGE);
+CVAR (Flag, compat_explode1,			compatflags2, COMPATF2_EXPLODE1);
+CVAR (Flag, compat_explode2,			compatflags2, COMPATF2_EXPLODE2);
 
 CVAR(Bool, vid_activeinbackground, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 

src/doomdef.h

@@ -329,6 +329,8 @@ enum : unsigned int
 	COMPATF2_TELEPORT		= 1 << 5,	// Don't let indirect teleports trigger sector actions
 	COMPATF2_PUSHWINDOW		= 1 << 6,	// Disable the window check in CheckForPushSpecial()
 	COMPATF2_CHECKSWITCHRANGE = 1 << 7,	// Enable buggy CheckSwitchRange behavior
+	COMPATF2_EXPLODE1		= 1 << 8,	// No vertical explosion thrust
+	COMPATF2_EXPLODE2		= 1 << 9	// Use original explosion code throughout.
 };
 
 // Emulate old bugs for select maps. These are not exposed by a cvar

src/gamedata/g_mapinfo.cpp

@@ -1642,6 +1642,8 @@ MapFlagHandlers[] =
 	{ "compat_teleport",				MITYPE_COMPATFLAG, 0, COMPATF2_TELEPORT },
 	{ "compat_pushwindow",				MITYPE_COMPATFLAG, 0, COMPATF2_PUSHWINDOW },
 	{ "compat_checkswitchrange",		MITYPE_COMPATFLAG, 0, COMPATF2_CHECKSWITCHRANGE },
+	{ "compat_explode1",				MITYPE_COMPATFLAG, 0, COMPATF2_EXPLODE1 },
+	{ "compat_explode2",				MITYPE_COMPATFLAG, 0, COMPATF2_EXPLODE2 },
 	{ "cd_start_track",					MITYPE_EATNEXT,	0, 0 },
 	{ "cd_end1_track",					MITYPE_EATNEXT,	0, 0 },
 	{ "cd_end2_track",					MITYPE_EATNEXT,	0, 0 },

src/maploader/compatibility.cpp

@@ -165,6 +165,8 @@ static FCompatOption Options[] =
 	{ "teleport",				COMPATF2_TELEPORT, SLOT_COMPAT2 },
 	{ "disablepushwindowcheck",	COMPATF2_PUSHWINDOW, SLOT_COMPAT2 },
 	{ "checkswitchrange",		COMPATF2_CHECKSWITCHRANGE, SLOT_COMPAT2 },
+	{ "explode1",				COMPATF2_EXPLODE1, SLOT_COMPAT2 },
+	{ "explode2",				COMPATF2_EXPLODE2, SLOT_COMPAT2 },
 	{ NULL, 0, 0 }
 };
 

src/p_map.cpp

@@ -5889,7 +5889,8 @@ int P_RadiusAttack(AActor *bombspot, AActor *bombsource, int bombdamage, int bom
 		// them far too "active." BossBrains also use the old code
 		// because some user levels require they have a height of 16,
 		// which can make them near impossible to hit with the new code.
-		if (((flags & RADF_NODAMAGE) || !((bombspot->flags5 | thing->flags5) & MF5_OLDRADIUSDMG)) && !(flags & RADF_OLDRADIUSDAMAGE))
+		if ((flags & RADF_NODAMAGE) || (!((bombspot->flags5 | thing->flags5) & MF5_OLDRADIUSDMG) && 
+			!(flags & RADF_OLDRADIUSDAMAGE) && !(thing->Level->i_compatflags2 & COMPATF2_EXPLODE2)))
 		{
 			double points = GetRadiusDamage(false, bombspot, thing, bombdamage, bombdistance, fulldamagedistance, bombsource == thing);
 			double check = int(points) * bombdamage;
@@ -5939,6 +5940,8 @@ int P_RadiusAttack(AActor *bombspot, AActor *bombsource, int bombdamage, int bom
 								}
 								thing->Thrust(bombspot->AngleTo(thing), thrust);
 								if (!(flags & RADF_NODAMAGE) || (flags & RADF_THRUSTZ))
+								{
+									if (!(thing->Level->i_compatflags2 & COMPATF2_EXPLODE1) || (flags & RADF_THRUSTZ))
 										thing->Vel.Z += vz;	// this really doesn't work well
 								}
 							}
@@ -5946,6 +5949,7 @@ int P_RadiusAttack(AActor *bombspot, AActor *bombsource, int bombdamage, int bom
 					}
 				}
 			}
+		}
 		else
 		{
 			// [RH] Old code just for barrels

wadsrc/static/language.csv

@@ -1543,7 +1543,9 @@ appuyez sur une touche.",,"Non puoi caricare una partita durante una net quest!
 
 Premi un tasto.","impossivel carregar, porque 
 esta em partida online!
-aperte uma tecla.",,
+aperte uma tecla.","Невозможно загрузить сохранение в сетевой игре!
+
+Нажмите любую клавишу.",
 "Quicksave over your quest named
 
 '%s'?
@@ -1560,7 +1562,11 @@ Appuyez sur Y ou N.",,"Sovrascrivere il salvataggio
 
 '%s'?
 
-Premi Y oppure N.",,,
+Premi Y oppure N.",,"Перезаписать быстрое сохранение
+
+«%s»?
+
+Нажмите Y или N.",
 "You can't quickload during a netquest!
 
 Press a key.",QLOADNET,chex,,,"Du kannst während eines Netzwerkspiels nicht schnellladen.
@@ -1572,7 +1578,9 @@ vous êtes en ligne!
 
 appuyez sur une touche.",,"Non puoi fare un quickload durante una netquest!
 
-Premi un tasto.",,,
+Premi un tasto.",,"Невозможно загрузить быстрое сохранение в сетевой игре!
+
+Нажмите любую клавишу.",
 "Do you want to quickload the quest named
 
 '%s'?
@@ -1589,7 +1597,11 @@ Appuyez sur Y ou N.",,"Vuoi fare un quickload della quest
 
 '%s'?
 
-Premi Y oppure N.",,,
+Premi Y oppure N.",,"""Желите брзо учитавање за игру под именом
+
+„%s“?
+
+Притисните Y или N.""",
 "You can't start a new quest
 while in a network quest.
 
@@ -1606,7 +1618,10 @@ durante una network quest.
 Premi un tasto.","impossivel iniciar um novo jogo
 enquanto se esta online.
 
-aperte uma tecla.",,
+aperte uma tecla.","You can't start a new game
+while in a network game.
+
+Press a key.",
 "Careful, this will be tough.
 Do you wish to continue?
 
@@ -2752,3 +2767,5 @@ Warning: The Vulkan renderer is highly experimental!,VK_WARNING,,,,Achtung: Der
 These options will require a restart to take effect.,VK_RESTART,,,,Diese Option erfordert einen Neustart!,Estas opciones requieren reiniciar para tener efecto.,,Ces options nécessitent un redémarrage.,,Queste opzioni richiedono il riavvio per avere effetto.,,,
 Select Vulkan Device,VKMNU_DEVICESELECT,,This is not yet implemented - but it is planned,,Vulkan Gerät auswählen,Seleccionar Dispositivo Vulkan,,Sélectionner périphérique Vulkan,,Seleziona il Dispositivo Vulkan,,,
 Press any key or click anywhere in the window to quit.,TXT_QUITENDOOM,,,,Drücke eine Taste oder klicke mit der Maus ins Fenster zum Beenden.,Presiona una tecla o haz click en cualquier lugar de la ventana para salir.,Presiona una tecla o da click en cualquier lugar de la ventana para salir.,Appuyez sur une touche ou cliquez pour quitter.,,,,,
+No vertical thrust from explosions,CMPTMNU_EXPLODE1,,,,Keine vertikale Bewegung durch Explosionen,,,,,,,,
+Use original Doom explosion behavior,CMPTMNU_EXPLODE2,,,Use original Doom explosion behaviour,Benutze Original Doom Explosionsverhalten,,,,,,,,

wadsrc/static/menudef.txt

@@ -1659,6 +1659,8 @@ OptionMenu "CompatPhysicsMenu" protected
 	Option "$CMPTMNU_TRACE",						"compat_TRACE", "YesNo"
 	Option "$CMPTMNU_HITSCAN",						"compat_HITSCAN", "YesNo"
 	Option "$CMPTMNU_MISSILECLIP",					"compat_MISSILECLIP", "YesNo"
+	Option "$CMPTMNU_EXPLODE1",						"compat_explode1", "YesNo"
+	Option "$CMPTMNU_EXPLODE2",						"compat_explode2", "YesNo"
 	Class "CompatibilityMenu"
 }
 

wadsrc/static/zscript/actors/attacks.zs

@@ -596,6 +596,7 @@ extend class Actor
 		int pflags = 0;
 		if (flags & XF_HURTSOURCE)	pflags |= RADF_HURTSOURCE;
 		if (flags & XF_NOTMISSILE)	pflags |= RADF_SOURCEISSPOT;
+		if (flags & XF_THRUSTZ)	pflags |= RADF_THRUSTZ;
 
 		int count = RadiusAttack (target, damage, distance, damagetype, pflags, fulldamagedistance);
 		if (!(flags & XF_NOSPLASH)) CheckSplash(distance);

wadsrc/static/zscript/constants.zs

@@ -258,6 +258,8 @@ enum EExplodeFlags
 	XF_NOTMISSILE = 4,
 	XF_EXPLICITDAMAGETYPE = 8,
 	XF_NOSPLASH = 16,
+	XF_THRUSTZ = 32,
+
 };
 
 // Flags for A_RadiusThrust
@@ -1338,4 +1340,6 @@ enum ECompatFlags
 	COMPATF2_TELEPORT		= 1 << 5,	// Don't let indirect teleports trigger sector actions
 	COMPATF2_PUSHWINDOW		= 1 << 6,	// Disable the window check in CheckForPushSpecial()
 	COMPATF2_CHECKSWITCHRANGE = 1 << 7,	// Enable buggy CheckSwitchRange behavior
+	COMPATF2_EXPLODE1		= 1 << 8,	// No vertical explosion thrust
+	COMPATF2_EXPLODE2		= 1 << 9	// Use original explosion code throughout.
 };