- restore old portal checks for Action Doom 2 (as a hidden compatibility option.)

SVN r3018 (trunk)

src/compatibility.cpp

@@ -90,6 +90,7 @@ static FCompatOption Options[] =
 	{ "resetplayerspeed",		0, BCOMPATF_RESETPLAYERSPEED },
 	{ "vileghosts",				0, BCOMPATF_VILEGHOSTS },
 	{ "ignoreteleporttags",		0, BCOMPATF_BADTELEPORTERS },
+	{ "oldportals",				0, BCOMPATF_BADPORTALS },
 
 	// list copied from g_mapinfo.cpp
 	{ "shorttex",				COMPATF_SHORTTEX, 0 },
@@ -280,7 +281,12 @@ void CheckCompatibility(MapData *map)
 		ib_compatflags = 0;
 		ii_compatparams = -1;
 	}
-
+	else if (Wads.GetLumpFile(map->lumpnum) == 1 && (gameinfo.flags & GI_COMPATPORTAL))
+	{
+		ii_compatflags = 0;
+		ib_compatflags = BCOMPATF_BADPORTALS;
+		ii_compatparams = -1;
+	}
 	else
 	{
 		map->GetChecksum(md5.Bytes);

src/d_iwad.cpp

@@ -174,6 +174,7 @@ void FIWadManager::ParseIWadInfo(const char *fn, const char *data, int datasize)
 						else if(sc.Compare("Extended")) iwad->flags |= GI_MENUHACK_EXTENDED;
 						else if(sc.Compare("Shorttex")) iwad->flags |= GI_COMPATSHORTTEX;
 						else if(sc.Compare("Stairs")) iwad->flags |= GI_COMPATSTAIRS;
+						else if(sc.Compare("Portals")) iwad->flags |= GI_BADPORTALS;
 						else sc.ScriptError(NULL);
 					}
 					while (sc.CheckString(","));

src/doomdef.h

@@ -342,6 +342,7 @@ enum
 	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
+	BCOMPATF_BADPORTALS			= 1 << 4,	// Restores the old unstable portal behavior
 };
 
 // phares 3/20/98:

src/p_spec.cpp

@@ -975,6 +975,9 @@ void P_SetupPortals()
 		points.Push(pt);
 	}
 
+	// Maps using undefined portal hacks may not benefit from portal optimizations.
+	if (ib_compatflags & BCOMPATF_BADPORTALS) return;
+
 	for(unsigned i=0;i<points.Size(); i++)
 	{
 		if (points[i]->special1 == 0 && points[i]->Mate != NULL)

src/r_plane.cpp

@@ -582,6 +582,10 @@ visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightl
 						check->viewx == stacked_viewx &&
 						check->viewy == stacked_viewy &&
 						check->viewz == stacked_viewz &&
+						(
+							// headache inducing logic... :(
+							(ib_compatflags & BCOMPATF_BADPORTALS) ||
+							(
 								check->alpha == alpha &&
 								(alpha == 0 ||	// if alpha is > 0 everything needs to be checked
 									(plane == check->height &&
@@ -595,7 +599,10 @@ visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightl
 									 angle == check->angle
 									)
 								) &&
-						check->viewangle == stacked_angle)
+								check->viewangle == stacked_angle
+							)
+						)
+					   )
 					{
 						return check;
 					}

wadsrc/static/iwadinfo.txt

@@ -26,6 +26,7 @@ IWad
 	Game = "Doom"
 	Config = "UrbanBrawl"
 	Mapinfo = "mapinfo/urbanbrawl.txt"
+	Compatibility = "Portals"
 	MustContain = "MAP01", "AD2LIB"
 	BannerColors = "a8 a8 00", "a8 00 00"
 }