Merge https://github.com/coelckers/gzdoom

src/am_map.cpp

@@ -2781,14 +2781,13 @@ void AM_drawKeys ()
 void AM_drawThings ()
 {
 	AMColor color;
-	int		 i;
 	AActor*	 t;
 	mpoint_t p;
 	DAngle	 angle;
 
-	for (i=0;i<numsectors;i++)
+	for (auto &sec : level.sectors)
 	{
-		t = sectors[i].thinglist;
+		t = sec.thinglist;
 		while (t)
 		{
 			if (am_cheat > 0 || !(t->flags6 & MF6_NOTONAUTOMAP))

src/c_cmds.cpp

@@ -1189,12 +1189,12 @@ static void PrintSecretString(const char *string, bool thislevel)
 		{
 			if (string[1] == 'S' || string[1] == 's')
 			{
-				long secnum = strtol(string+2, (char**)&string, 10);
+				auto secnum = strtoul(string+2, (char**)&string, 10);
 				if (*string == ';') string++;
-				if (thislevel && secnum >= 0 && secnum < numsectors)
+				if (thislevel && secnum < level.sectors.Size())
 				{
-					if (sectors[secnum].isSecret()) colstr = TEXTCOLOR_RED;
+					if (level.sectors[secnum].isSecret()) colstr = TEXTCOLOR_RED;
-					else if (sectors[secnum].wasSecret()) colstr = TEXTCOLOR_GREEN;
+					else if (level.sectors[secnum].wasSecret()) colstr = TEXTCOLOR_GREEN;
 					else colstr = TEXTCOLOR_ORANGE;
 				}
 			}

src/compatibility.cpp

@@ -530,9 +530,9 @@ void SetCompatibilityParams()
 				}
 				case CP_SECTORFLOOROFFSET:
 				{
-					if (CompatParams[i+1] < numsectors)
+					if ((unsigned)CompatParams[i+1] < level.sectors.Size())
 					{
-						sector_t *sec = &sectors[CompatParams[i+1]];
+						sector_t *sec = &level.sectors[CompatParams[i+1]];
 						const double delta = CompatParams[i + 2] / 65536.0;
 						sec->floorplane.ChangeHeight(delta);
 						sec->ChangePlaneTexZ(sector_t::floor, delta);
@@ -542,10 +542,10 @@ void SetCompatibilityParams()
 				}
 				case CP_SETSECTORSPECIAL:
 				{
-					const int index = CompatParams[i + 1];
+					const unsigned index = CompatParams[i + 1];
-					if (index < numsectors)
+					if (index < level.sectors.Size())
 					{
-						sectors[index].special = CompatParams[i + 2];
+						level.sectors[index].special = CompatParams[i + 2];
 					}
 					i += 3;
 					break;
@@ -575,7 +575,7 @@ void SetCompatibilityParams()
 				}	
 				case CP_SETTAG:
 				{
-					if ((unsigned)CompatParams[i + 1] < (unsigned)numsectors)
+					if ((unsigned)CompatParams[i + 1] < level.sectors.Size())
 					{
 						// this assumes that the sector does not have any tags yet!
 						if (CompatParams[i + 2] == 0)

src/dobject.cpp

@@ -479,12 +479,10 @@ size_t DObject::StaticPointerSubstitution (DObject *old, DObject *notOld, bool s
 	}
 
 	// Go through sectors.
-	if (sectors != NULL)
+	for (auto &sec : level.sectors)
-	{
-		for (i = 0; i < numsectors; ++i)
 	{
 #define SECTOR_CHECK(f,t) \
-	if (sectors[i].f.p == static_cast<t *>(old)) { sectors[i].f = static_cast<t *>(notOld); changed++; }
+if (sec.f.p == static_cast<t *>(old)) { sec.f = static_cast<t *>(notOld); changed++; }
 		SECTOR_CHECK( SoundTarget, AActor );
 		SECTOR_CHECK( SecActTarget, ASectorAction );
 		SECTOR_CHECK( floordata, DSectorEffect );
@@ -492,7 +490,6 @@ size_t DObject::StaticPointerSubstitution (DObject *old, DObject *notOld, bool s
 		SECTOR_CHECK( lightingdata, DSectorEffect );
 #undef SECTOR_CHECK
 	}
-	}
 
 	// Go through bot stuff.
 	if (bglobal.firstthing.p == (AActor *)old)		bglobal.firstthing = (AActor *)notOld, ++changed;

src/dobjgc.cpp

@@ -346,13 +346,13 @@ static void MarkRoot()
 	// Mark sound sequences.
 	DSeqNode::StaticMarkHead();
 	// Mark sectors.
-	if (SectorMarker == NULL && sectors != NULL)
+	if (SectorMarker == nullptr && level.sectors.Size() > 0)
 	{
 		SectorMarker = new DSectorMarker;
 	}
-	else if (sectors == NULL)
+	else if (level.sectors.Size() == 0)
 	{
-		SectorMarker = NULL;
+		SectorMarker = nullptr;
 	}
 	else
 	{
@@ -677,12 +677,11 @@ size_t DSectorMarker::PropagateMark()
 	int i;
 	int marked = 0;
 	bool moretodo = false;
+	int numsectors = level.sectors.Size();
 
-	if (sectors != NULL)
-	{
 	for (i = 0; i < SECTORSTEPSIZE && SecNum + i < numsectors; ++i)
 	{
-			sector_t *sec = &sectors[SecNum + i];
+		sector_t *sec = &level.sectors[SecNum + i];
 		GC::Mark(sec->SoundTarget);
 		GC::Mark(sec->SecActTarget);
 		GC::Mark(sec->floordata);
@@ -696,7 +695,7 @@ size_t DSectorMarker::PropagateMark()
 		SecNum += i;
 		moretodo = true;
 	}
-	}
+
 	if (!moretodo && polyobjs != NULL)
 	{
 		for (i = 0; i < POLYSTEPSIZE && PolyNum + i < po_NumPolyobjs; ++i)

src/edata.cpp

@@ -753,27 +753,26 @@ void ProcessEDSector(sector_t *sec, int recordnum)
 
 void ProcessEDSectors()
 {
-	int i;
-
 	InitED();
 	if (EDSectors.CountUsed() == 0) return;	// don't waste time if there's no records.
 
 	// collect all Extradata sector records up front so we do not need to search the complete line array for each sector separately.
+	auto numsectors = level.sectors.Size();
 	int *sectorrecord = new int[numsectors];
 	memset(sectorrecord, -1, numsectors * sizeof(int));
-	for (i = 0; i < numlines; i++)
+	for (int i = 0; i < numlines; i++)
 	{
 		if (lines[i].special == Static_Init && lines[i].args[1] == Init_EDSector)
 		{
-			sectorrecord[lines[i].frontsector - sectors] = lines[i].args[0];
+			sectorrecord[lines[i].frontsector->Index()] = lines[i].args[0];
 			lines[i].special = 0;
 		}
 	}
-	for (i = 0; i < numsectors; i++)
+	for (unsigned i = 0; i < numsectors; i++)
 	{
 		if (sectorrecord[i] >= 0)
 		{
-			ProcessEDSector(&sectors[i], sectorrecord[i]);
+			ProcessEDSector(&level.sectors[i], sectorrecord[i]);
 		}
 	}
 	delete[] sectorrecord;

src/fragglescript/t_func.cpp

@@ -321,7 +321,7 @@ public:
 		if (tag < 0)
 		{
 			searchtag = INT_MIN;
-			start = tag == -32768? 0 : -tag < numsectors? -tag : -1;
+			start = tag == -32768? 0 : -tag < (int)level.sectors.Size()? -tag : -1;
 		}
 	}
 };
@@ -1531,7 +1531,7 @@ void FParser::SF_StartSectorSound(void)
 		FSSectorTagIterator itr(tagnum);
 		while ((i = itr.Next()) >= 0)
 		{
-			sector = &sectors[i];
+			sector = &level.sectors[i];
 			S_Sound(sector, CHAN_BODY, T_FindSound(stringvalue(t_argv[1])), 1.0f, ATTN_NORM);
 		}
 	}
@@ -1568,13 +1568,14 @@ void FParser::SF_FloorHeight(void)
 			FSSectorTagIterator itr(tagnum);
 			while ((i = itr.Next()) >= 0)
 			{
-				if (sectors[i].floordata) continue;	// don't move floors that are active!
+				auto &sec = level.sectors[i];
+				if (sec.floordata) continue;	// don't move floors that are active!
 
-				if (sectors[i].MoveFloor(
+				if (sec.MoveFloor(
-					fabs(dest - sectors[i].CenterFloor()), 
+					fabs(dest - sec.CenterFloor()),
-					sectors[i].floorplane.PointToDist (sectors[i].centerspot, dest),
+					sec.floorplane.PointToDist (sec.centerspot, dest),
 					crush? 10:-1, 
-					(dest > sectors[i].CenterFloor()) ? 1 : -1,
+					(dest > sec.CenterFloor()) ? 1 : -1,
 					false) == EMoveResult::crushed)
 				{
 					returnval = 0;
@@ -1589,7 +1590,7 @@ void FParser::SF_FloorHeight(void)
 				script_error("sector not found with tagnum %i\n", tagnum); 
 				return;
 			}
-			returnval = sectors[secnum].CenterFloor();
+			returnval = level.sectors[secnum].CenterFloor();
 		}
 		
 		// return floor height
@@ -1622,7 +1623,7 @@ void FParser::SF_MoveFloor(void)
 		FSSectorTagIterator itr(tagnum);
 		while ((secnum = itr.Next()) >= 0)
 		{
-			P_CreateFloor(&sectors[secnum], DFloor::floorMoveToValue, NULL, platspeed, destheight, crush, 0, false, false);
+			P_CreateFloor(&level.sectors[secnum], DFloor::floorMoveToValue, NULL, platspeed, destheight, crush, 0, false, false);
 		}
 	}
 }
@@ -1657,13 +1658,14 @@ void FParser::SF_CeilingHeight(void)
 			FSSectorTagIterator itr(tagnum);
 			while ((i = itr.Next()) >= 0)
 			{
-				if (sectors[i].ceilingdata) continue;	// don't move ceilings that are active!
+				auto &sec = level.sectors[i];
+				if (sec.ceilingdata) continue;	// don't move ceilings that are active!
 
-				if (sectors[i].MoveCeiling(
+				if (sec.MoveCeiling(
-					fabs(dest - sectors[i].CenterCeiling()), 
+					fabs(dest - sec.CenterCeiling()), 
-					sectors[i].ceilingplane.PointToDist (sectors[i].centerspot, dest), 
+					sec.ceilingplane.PointToDist (sec.centerspot, dest), 
 					crush? 10:-1,
-					(dest > sectors[i].CenterCeiling()) ? 1 : -1,
+					(dest > sec.CenterCeiling()) ? 1 : -1,
 					false) == EMoveResult::crushed)
 				{
 					returnval = 0;
@@ -1678,7 +1680,7 @@ void FParser::SF_CeilingHeight(void)
 				script_error("sector not found with tagnum %i\n", tagnum); 
 				return;
 			}
-			returnval = sectors[secnum].CenterCeiling();
+			returnval = level.sectors[secnum].CenterCeiling();
 		}
 		
 		// return ceiling height
@@ -1713,7 +1715,7 @@ void FParser::SF_MoveCeiling(void)
 		FSSectorTagIterator itr(tagnum);
 		while ((secnum = itr.Next()) >= 0)
 		{
-			P_CreateCeiling(&sectors[secnum], DCeiling::ceilMoveToValue, NULL, tagnum, platspeed, platspeed, destheight, crush, silent | 4, 0, DCeiling::ECrushMode::crushDoom);
+			P_CreateCeiling(&level.sectors[secnum], DCeiling::ceilMoveToValue, NULL, tagnum, platspeed, platspeed, destheight, crush, silent | 4, 0, DCeiling::ECrushMode::crushDoom);
 		}
 	}
 }
@@ -1742,7 +1744,7 @@ void FParser::SF_LightLevel(void)
 			return;
 		}
 		
-		sector = &sectors[secnum];
+		sector = &level.sectors[secnum];
 		
 		if(t_argc > 1)          // > 1: set light level
 		{
@@ -1752,7 +1754,7 @@ void FParser::SF_LightLevel(void)
 			FSSectorTagIterator itr(tagnum);
 			while ((i = itr.Next()) >= 0)
 			{
-				sectors[i].SetLightLevel(intvalue(t_argv[1]));
+				level.sectors[i].SetLightLevel(intvalue(t_argv[1]));
 			}
 		}
 		
@@ -1870,7 +1872,7 @@ void FParser::SF_FadeLight(void)
 		FSectorTagIterator it(sectag);
 		while ((i = it.Next()) >= 0)
 		{
-			if (!sectors[i].lightingdata) new DLightLevel(&sectors[i],destlevel,speed);
+			if (!level.sectors[i].lightingdata) new DLightLevel(&level.sectors[i],destlevel,speed);
 		}
 	}
 }
@@ -1895,7 +1897,7 @@ void FParser::SF_FloorTexture(void)
 		if(secnum < 0)
 		{ script_error("sector not found with tagnum %i\n", tagnum); return;}
 		
-		sector = &sectors[secnum];
+		sector = &level.sectors[secnum];
 		
 		if(t_argc > 1)
 		{
@@ -1906,7 +1908,7 @@ void FParser::SF_FloorTexture(void)
 			FSSectorTagIterator itr(tagnum);
 			while ((i = itr.Next()) >= 0)
 			{
-				sectors[i].SetTexture(sector_t::floor, picnum);
+				level.sectors[i].SetTexture(sector_t::floor, picnum);
 			}
 		}
 		
@@ -1947,7 +1949,7 @@ void FParser::SF_SectorColormap(void)
 	if(secnum < 0)
 	{ script_error("sector not found with tagnum %i\n", tagnum); return;}
 	
-	sector = &sectors[secnum];
+	sector = &level.sectors[secnum];
 
 	if (t_argv[1].type==svt_string)
 	{
@@ -1957,7 +1959,7 @@ void FParser::SF_SectorColormap(void)
 		while ((i = itr.Next()) >= 0)
 		{
 			sectors[i].midmap=cm;
-			sectors[i].heightsec=&sectors[i];
+			sectors[i].heightsec=&level.sectors[i];
 		}
 	}
 	*/	
@@ -1985,7 +1987,7 @@ void FParser::SF_CeilingTexture(void)
 		if(secnum < 0)
 		{ script_error("sector not found with tagnum %i\n", tagnum); return;}
 		
-		sector = &sectors[secnum];
+		sector = &level.sectors[secnum];
 		
 		if(t_argc > 1)
 		{
@@ -1996,7 +1998,7 @@ void FParser::SF_CeilingTexture(void)
 			FSSectorTagIterator itr(tagnum);
 			while ((i = itr.Next()) >= 0)
 			{
-				sectors[i].SetTexture(sector_t::ceiling, picnum);
+				level.sectors[i].SetTexture(sector_t::ceiling, picnum);
 			}
 		}
 		
@@ -3888,7 +3890,7 @@ void FParser::SF_SetColor(void)
 		FSSectorTagIterator itr(tagnum);
 		while ((i = itr.Next()) >= 0)
 		{
-			sectors[i].ColorMap = GetSpecialLights (color, sectors[i].ColorMap->Fade, 0);
+			level.sectors[i].ColorMap = GetSpecialLights (color, level.sectors[i].ColorMap->Fade, 0);
 		}
 	}
 }

src/fragglescript/t_script.cpp

@@ -489,7 +489,7 @@ bool DFraggleThinker::wait_finished(DRunningScript *script)
 			FSectorTagIterator itr(script->wait_data);
 			while ((secnum = itr.Next()) >= 0)
 			{
-				sector_t *sec = &sectors[secnum];
+				sector_t *sec = &level.sectors[secnum];
 				if(sec->floordata || sec->ceilingdata || sec->lightingdata)
 					return false;        // not finished
 			}

src/g_game.cpp

@@ -2241,7 +2241,7 @@ void G_DoSaveGame (bool okForQuicksave, FString filename, const char *descriptio
 
 	// Do not even try, if we're not in a level. (Can happen after
 	// a demo finishes playback.)
-	if (lines == NULL || sectors == NULL || gamestate != GS_LEVEL)
+	if (lines == NULL || level.sectors.Size() == 0 || gamestate != GS_LEVEL)
 	{
 		return;
 	}
@@ -2801,7 +2801,7 @@ void G_DoPlayDemo (void)
 		{
 			G_InitNew (mapname, false);
 		}
-		else if (numsectors == 0)
+		else if (level.sectors.Size() == 0)
 		{
 			I_Error("Cannot play demo without its savegame\n");
 		}

src/g_level.cpp

@@ -1842,8 +1842,8 @@ void FLevelLocals::AddScroller (int secnum)
 	}
 	if (Scrolls.Size() == 0)
 	{
-		Scrolls.Resize(numsectors);
+		Scrolls.Resize(sectors.Size());
-		memset (&Scrolls[0], 0, sizeof(Scrolls[0])*numsectors);
+		memset(&Scrolls[0], 0, sizeof(Scrolls[0])*Scrolls.Size());
 	}
 }
 

src/g_level.h

@@ -400,6 +400,8 @@ struct FLevelLocals
 	FString		NextSecretMap;		// map to go to when used secret exit
 	EMapType	maptype;
 
+	TStaticArray<sector_t> sectors;
+
 	DWORD		flags;
 	DWORD		flags2;
 	DWORD		flags3;
@@ -446,7 +448,6 @@ struct FLevelLocals
 	bool		IsFreelookAllowed() const;
 };
 
-
 struct cluster_info_t
 {
 	int			cluster;

src/g_shared/a_lightning.cpp

@@ -22,8 +22,8 @@ DLightningThinker::DLightningThinker ()
 	LightningFlashCount = 0;
 	NextLightningFlash = ((pr_lightning()&15)+5)*35; // don't flash at level start
 
-	LightningLightLevels.Resize(numsectors);
+	LightningLightLevels.Resize(level.sectors.Size());
-	fillshort(&LightningLightLevels[0], numsectors, SHRT_MAX);
+	fillshort(&LightningLightLevels[0], LightningLightLevels.Size(), SHRT_MAX);
 }
 
 DLightningThinker::~DLightningThinker ()
@@ -63,8 +63,8 @@ void DLightningThinker::LightningFlash ()
 		LightningFlashCount--;
 		if (LightningFlashCount)
 		{ // reduce the brightness of the flash
-			tempSec = sectors;
+			tempSec = &level.sectors[0];
-			for (i = numsectors, j = 0; i > 0; ++j, --i, ++tempSec)
+			for (i = level.sectors.Size(), j = 0; i > 0; ++j, --i, ++tempSec)
 			{
 				// [RH] Checking this sector's applicability to lightning now
 				// is not enough to know if we should lower its light level,
@@ -79,15 +79,15 @@ void DLightningThinker::LightningFlash ()
 		}					
 		else
 		{ // remove the alternate lightning flash special
-			tempSec = sectors;
+			tempSec = &level.sectors[0];
-			for (i = numsectors, j = 0; i > 0; ++j, --i, ++tempSec)
+			for (i = level.sectors.Size(), j = 0; i > 0; ++j, --i, ++tempSec)
 			{
 				if (LightningLightLevels[j] != SHRT_MAX)
 				{
 					tempSec->SetLightLevel(LightningLightLevels[j]);
 				}
 			}
-			fillshort(&LightningLightLevels[0], numsectors, SHRT_MAX);
+			fillshort(&LightningLightLevels[0], level.sectors.Size(), SHRT_MAX);
 			level.flags &= ~LEVEL_SWAPSKIES;
 		}
 		return;
@@ -95,8 +95,8 @@ void DLightningThinker::LightningFlash ()
 
 	LightningFlashCount = (pr_lightning()&7)+8;
 	flashLight = 200+(pr_lightning()&31);
-	tempSec = sectors;
+	tempSec = &level.sectors[0];
-	for (i = numsectors, j = 0; i > 0; --i, ++j, ++tempSec)
+	for (i = level.sectors.Size(), j = 0; i > 0; ++j, --i, ++tempSec)
 	{
 		// allow combination of the lightning sector specials with bit masks
 		int special = tempSec->special;

src/g_shared/a_skies.cpp

@@ -117,7 +117,7 @@ void ASkyPicker::PostBeginPlay ()
 
 	if (box == NULL && args[0] != 0)
 	{
-		Printf ("Can't find SkyViewpoint %d for sector %td\n", args[0], Sector - sectors);
+		Printf ("Can't find SkyViewpoint %d for sector %d\n", args[0], Sector->sectornum);
 	}
 	else
 	{

src/gl/data/gl_data.cpp

@@ -154,9 +154,9 @@ int LS_Sector_SetPlaneReflection (line_t *ln, AActor *it, bool backSide,
 
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sector_t * s = &sectors[secnum];
+		sector_t * s = &level.sectors[secnum];
 		if (!s->floorplane.isSlope()) s->reflect[sector_t::floor] = arg1/255.f;
-		if (!s->ceilingplane.isSlope()) sectors[secnum].reflect[sector_t::ceiling] = arg2/255.f;
+		if (!s->ceilingplane.isSlope()) level.sectors[secnum].reflect[sector_t::ceiling] = arg2/255.f;
 	}
 
 	return true;
@@ -532,14 +532,12 @@ void gl_InitData()
 
 CCMD(dumpgeometry)
 {
-	for(int i=0;i<numsectors;i++)
+	for(auto &sector : level.sectors)
 	{
-		sector_t * sector = &sectors[i];
+		Printf(PRINT_LOG, "Sector %d\n", sector.sectornum);
-
+		for(int j=0;j<sector.subsectorcount;j++)
-		Printf(PRINT_LOG, "Sector %d\n",i);
-		for(int j=0;j<sector->subsectorcount;j++)
 		{
-			subsector_t * sub = sector->subsectors[j];
+			subsector_t * sub = sector.subsectors[j];
 
 			Printf(PRINT_LOG, "    Subsector %d - real sector = %d - %s\n", int(sub-subsectors), sub->sector->sectornum, sub->hacked&1? "hacked":"");
 			for(DWORD k=0;k<sub->numlines;k++)

src/gl/data/gl_portaldata.cpp

@@ -337,18 +337,17 @@ void gl_BuildPortalCoverage(FPortalCoverage *coverage, subsector_t *subsector, c
 
 static void CollectPortalSectors(FPortalMap &collection)
 {
-	for (int i=0;i<numsectors;i++)
+	for (auto &sec : level.sectors)
 	{
-		sector_t *sec = &sectors[i];
 		for (int j = 0; j < 2; j++)
 		{
-			int ptype = sec->GetPortalType(j);
+			int ptype = sec.GetPortalType(j);
 			if (ptype== PORTS_STACKEDSECTORTHING || ptype == PORTS_PORTAL || ptype == PORTS_LINKEDPORTAL)	// only offset-displacing portal types
 			{
-				FPortalID id = { sec->GetPortalDisplacement(j) };
+				FPortalID id = { sec.GetPortalDisplacement(j) };
 
 				FPortalSectors &sss = collection[id];
-				FPortalSector ss = { sec, j };
+				FPortalSector ss = { &sec, j };
 				sss.Push(ss);
 			}
 		}

src/gl/data/gl_setup.cpp

@@ -257,11 +257,11 @@ static void PrepareSectorData()
 		ss->render_sector->subsectorcount++;
 	}
 
-	for (i=0; i<numsectors; i++) 
+	for (auto &sec : level.sectors) 
 	{
-		sectors[i].subsectors = subsectorbuffer;
+		sec.subsectors = subsectorbuffer;
-		subsectorbuffer += sectors[i].subsectorcount;
+		subsectorbuffer += sec.subsectorcount;
-		sectors[i].subsectorcount = 0;
+		sec.subsectorcount = 0;
 	}
 	
 	for(i=0, ss = subsectors; i<numsubsectors; i++, ss++)
@@ -307,13 +307,6 @@ static void PrepareTransparentDoors(sector_t * sector)
 	unsigned int selfref=0;
 	sector_t * nextsec=NULL;
 
-#ifdef _DEBUG
-	if (sector-sectors==34)
-	{
-		int a = 0;
-	}
-#endif
-
 	P_Recalculate3DFloors(sector);
 	if (sector->subsectorcount==0) return;
 
@@ -388,7 +381,7 @@ static void PrepareTransparentDoors(sector_t * sector)
 
 static void AddToVertex(const sector_t * sec, TArray<int> & list)
 {
-	int secno = int(sec-sectors);
+	int secno = sec->Index();
 
 	for(unsigned i=0;i<list.Size();i++)
 	{
@@ -448,7 +441,7 @@ static void InitVertexData()
 			vertexes[i].heightlist = new float[cnt*2];
 			for(int j=0;j<cnt;j++)
 			{
-				vertexes[i].sectors[j] = &sectors[vt_sectorlists[i][j]];
+				vertexes[i].sectors[j] = &level.sectors[vt_sectorlists[i][j]];
 			}
 		}
 		else
@@ -590,20 +583,18 @@ extern int restart;
 
 void gl_PreprocessLevel()
 {
-	int i;
-
 	PrepareSegs();
 	PrepareSectorData();
 	InitVertexData();
 	int *checkmap = new int[numvertexes];
 	memset(checkmap, -1, sizeof(int)*numvertexes);
-	for(i=0;i<numsectors;i++) 
+	for(auto &sec : level.sectors) 
 	{
-		sectors[i].sectornum = i;
+		int i = sec.sectornum;
-		PrepareTransparentDoors(&sectors[i]);
+		PrepareTransparentDoors(&sec);
 
 		// This ignores vertices only used for seg splitting because those aren't needed here
-		for(auto l : sectors[i].Lines)
+		for(auto l : sec.Lines)
 		{
 			if (l->sidedef[0]->Flags & WALLF_POLYOBJ) continue;	// don't bother with polyobjects
 
@@ -613,14 +604,14 @@ void gl_PreprocessLevel()
 			if (checkmap[vtnum1] < i)
 			{
 				checkmap[vtnum1] = i;
-				sectors[i].e->vertices.Push(&vertexes[vtnum1]);
+				sec.e->vertices.Push(&vertexes[vtnum1]);
 				vertexes[vtnum1].dirty = true;
 			}
 
 			if (checkmap[vtnum2] < i)
 			{
 				checkmap[vtnum2] = i;
-				sectors[i].e->vertices.Push(&vertexes[vtnum2]);
+				sec.e->vertices.Push(&vertexes[vtnum2]);
 				vertexes[vtnum2].dirty = true;
 			}
 		}
@@ -683,10 +674,10 @@ void gl_CleanLevelData()
 		delete [] sides[0].segs;
 		sides[0].segs = NULL;
 	}
-	if (sectors && sectors[0].subsectors) 
+	if (level.sectors.Size() > 0 && level.sectors[0].subsectors) 
 	{
-		delete [] sectors[0].subsectors;
+		delete [] level.sectors[0].subsectors;
-		sectors[0].subsectors = NULL;
+		level.sectors[0].subsectors = nullptr;
 	}
 	for (int i=0;i<numsubsectors;i++)
 	{

src/gl/data/gl_vertexbuffer.cpp

@@ -394,27 +394,25 @@ void FFlatVertexBuffer::CreateFlatVBO()
 {
 	for (int h = sector_t::floor; h <= sector_t::ceiling; h++)
 	{
-		for(int i=0; i<numsectors;i++)
+		for(auto &sec : level.sectors)
 		{
-			CreateVertices(h, &sectors[i], sectors[i].GetSecPlane(h), h == sector_t::floor);
+			CreateVertices(h, &sec, sec.GetSecPlane(h), h == sector_t::floor);
 		}
 	}
 
 	// We need to do a final check for Vavoom water and FF_FIX sectors.
 	// No new vertices are needed here. The planes come from the actual sector
-	for(int i=0; i<numsectors;i++)
+	for (auto &sec : level.sectors)
 	{
-		for(unsigned j=0;j<sectors[i].e->XFloor.ffloors.Size(); j++)
+		for(auto ff : sec.e->XFloor.ffloors)
 		{
-			F3DFloor *ff = sectors[i].e->XFloor.ffloors[j];
+			if (ff->top.model == &sec)
-
-			if (ff->top.model == &sectors[i])
 			{
-				ff->top.vindex = sectors[i].vboindex[ff->top.isceiling];
+				ff->top.vindex = sec.vboindex[ff->top.isceiling];
 			}
-			if (ff->bottom.model == &sectors[i])
+			if (ff->bottom.model == &sec)
 			{
-				ff->bottom.vindex = sectors[i].vboindex[ff->top.isceiling];
+				ff->bottom.vindex = sec.vboindex[ff->top.isceiling];
 			}
 		}
 	}

src/gl/scene/gl_bsp.cpp

@@ -420,7 +420,7 @@ static void DoSubsector(subsector_t * sub)
 	sector_t fake;
 	
 #ifdef _DEBUG
-	if (sub->sector-sectors==931)
+	if (sub->sector->sectornum==931)
 	{
 		int a = 0;
 	}

src/gl/scene/gl_drawinfo.cpp

@@ -1043,11 +1043,11 @@ void FDrawInfo::StartScene()
 {
 	ClearBuffers();
 
-	sectorrenderflags.Resize(numsectors);
+	sectorrenderflags.Resize(level.sectors.Size());
 	ss_renderflags.Resize(numsubsectors);
 	no_renderflags.Resize(numsubsectors);
 
-	memset(&sectorrenderflags[0], 0, numsectors * sizeof(sectorrenderflags[0]));
+	memset(&sectorrenderflags[0], 0, level.sectors.Size() * sizeof(sectorrenderflags[0]));
 	memset(&ss_renderflags[0], 0, numsubsectors * sizeof(ss_renderflags[0]));
 	memset(&no_renderflags[0], 0, numnodes * sizeof(no_renderflags[0]));
 

src/gl/scene/gl_fakeflat.cpp

@@ -210,7 +210,7 @@ sector_t * gl_FakeFlat(sector_t * sec, sector_t * dest, area_t in_area, bool bac
 	}
 
 #ifdef _DEBUG
-	if (sec-sectors==560)
+	if (sec->sectornum==560)
 	{
 		int a = 0;
 	}

src/gl/scene/gl_flats.cpp

@@ -582,7 +582,7 @@ void GLFlat::ProcessSector(sector_t * frontsector)
 #endif
 
 	// Get the real sector for this one.
-	sector = &sectors[frontsector->sectornum];
+	sector = &level.sectors[frontsector->sectornum];
 	extsector_t::xfloor &x = sector->e->XFloor;
 	dynlightindex = -1;
 

src/gl/scene/gl_sprite.cpp

@@ -895,7 +895,7 @@ void GLSprite::Process(AActor* thing, sector_t * sector, int thruportal)
 		Colormap=rendersector->ColorMap;
 		if (fullbright)
 		{
-			if (rendersector == &sectors[rendersector->sectornum] || in_area != area_below)	
+			if (rendersector == &level.sectors[rendersector->sectornum] || in_area != area_below)	
 				// under water areas keep their color for fullbright objects
 			{
 				// Only make the light white but keep everything else (fog, desaturation and Boom colormap.)

src/gl/scene/gl_walls.cpp

@@ -1435,8 +1435,8 @@ void GLWall::Process(seg_t *seg, sector_t * frontsector, sector_t * backsector)
 	else
 	{
 		// Need these for aligning the textures
-		realfront = &sectors[frontsector->sectornum];
+		realfront = &level.sectors[frontsector->sectornum];
-		realback = backsector ? &sectors[backsector->sectornum] : NULL;
+		realback = backsector ? &level.sectors[backsector->sectornum] : NULL;
 		segfront = frontsector;
 		segback = backsector;
 	}

src/nodebuild.cpp

@@ -1053,7 +1053,7 @@ void FNodeBuilder::PrintSet (int l, DWORD set)
 	Printf (PRINT_LOG, "set %d:\n", l);
 	for (; set != DWORD_MAX; set = Segs[set].next)
 	{
-		Printf (PRINT_LOG, "\t%u(%td)%c%d(%d,%d)-%d(%d,%d)\n", set, Segs[set].frontsector-sectors,
+		Printf (PRINT_LOG, "\t%u(%td)%c%d(%d,%d)-%d(%d,%d)\n", set, Segs[set].frontsector->sectornum,
 			Segs[set].linedef == -1 ? '+' : ':',
 			Segs[set].v1,
 			Vertices[Segs[set].v1].x>>16, Vertices[Segs[set].v1].y>>16,

src/p_3dfloors.cpp

@@ -224,7 +224,7 @@ static int P_Set3DFloor(line_t * line, int param, int param2, int alpha)
 	FSectorTagIterator itr(tag);
 	while ((s = itr.Next()) >= 0)
 	{
-		ss = &sectors[s];
+		ss = &level.sectors[s];
 
 		if (param == 0)
 		{
@@ -888,9 +888,9 @@ void P_Spawn3DFloors (void)
 		line->args[0] = line->args[1] = line->args[2] = line->args[3] = line->args[4] = 0;
 	}
 	// kg3D - do it in software
-	for (i = 0; i < numsectors; i++)
+	for (auto &sec : level.sectors)
 	{
-		P_Recalculate3DFloors(&sectors[i]);
+		P_Recalculate3DFloors(&sec);
 	}
 }
 
@@ -984,7 +984,7 @@ CCMD (dump3df)
 	if (argv.argc() > 1) 
 	{
 		int sec = strtol(argv[1], NULL, 10);
-		sector_t *sector = &sectors[sec];
+		sector_t *sector = &level.sectors[sec];
 		TArray<F3DFloor*> & ffloors=sector->e->XFloor.ffloors;
 
 		for (unsigned int i = 0; i < ffloors.Size(); i++)

src/p_3dmidtex.cpp

@@ -122,10 +122,10 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 
 	// Bit arrays that mark whether a line or sector is to be attached.
 	BYTE *found_lines = new BYTE[(numlines+7)/8];
-	BYTE *found_sectors = new BYTE[(numsectors+7)/8];
+	BYTE *found_sectors = new BYTE[(level.sectors.Size()+7)/8];
 
 	memset(found_lines, 0, sizeof (BYTE) * ((numlines+7)/8));
-	memset(found_sectors, 0, sizeof (BYTE) * ((numsectors+7)/8));
+	memset(found_sectors, 0, sizeof (BYTE) * ((level.sectors.Size()+7)/8));
 
 	// mark all lines and sectors that are already attached to this one
 	// and clear the arrays. The old data will be re-added automatically
@@ -138,7 +138,7 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 
 	for (unsigned i=0; i < scrollplane.AttachedSectors.Size(); i++)
 	{
-		int sec = int(scrollplane.AttachedSectors[i] - sectors);
+		int sec = scrollplane.AttachedSectors[i]->sectornum;
 		found_sectors[sec>>3] |= 1 << (sec&7);
 	}
 
@@ -167,7 +167,7 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 		int sec;
 		while ((sec = it.Next()) >= 0)
 		{
-			for (auto ln : sectors[sec].Lines)
+			for (auto ln : level.sectors[sec].Lines)
 			{
 				if (lineid != 0 && !tagManager.LineHasID(ln, lineid)) continue;
 
@@ -189,21 +189,21 @@ void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool c
 		{
 			scrollplane.AttachedLines.Push(&lines[i]);
 
-			v = int(lines[i].frontsector - sectors);
+			v = lines[i].frontsector->sectornum;
-			assert(v < numsectors);
+			assert(v < (int)level.sectors.Size());
 			found_sectors[v>>3] |= 1 << (v&7);
 
-			v = int(lines[i].backsector - sectors);
+			v = lines[i].backsector->sectornum;
-			assert(v < numsectors);
+			assert(v < (int)level.sectors.Size());
 			found_sectors[v>>3] |= 1 << (v&7);
 		}
 	}
 
-	for (int i=0; i < numsectors; i++)
+	for (unsigned i=0; i < level.sectors.Size(); i++)
 	{
 		if (found_sectors[i>>3] & (1 << (i&7)))
 		{
-			scrollplane.AttachedSectors.Push(&sectors[i]);
+			scrollplane.AttachedSectors.Push(&level.sectors[i]);
 		}
 	}
 

src/p_acs.cpp

@@ -1423,7 +1423,7 @@ DPlaneWatcher::DPlaneWatcher (AActor *it, line_t *line, int lineSide, bool ceili
 	{
 		secplane_t plane;
 
-		Sector = &sectors[secnum];
+		Sector = &level.sectors[secnum];
 		if (bCeiling)
 		{
 			plane = Sector->ceilingplane;
@@ -3263,7 +3263,7 @@ void DLevelScript::ChangeFlat (int tag, int name, bool floorOrCeiling)
 	while ((secnum = it.Next()) >= 0)
 	{
 		int pos = floorOrCeiling? sector_t::ceiling : sector_t::floor;
-		sectors[secnum].SetTexture(pos, flat);
+		level.sectors[secnum].SetTexture(pos, flat);
 	}
 }
 
@@ -3351,14 +3351,12 @@ void DLevelScript::ReplaceTextures (int fromnamei, int tonamei, int flags)
 		picnum1 = TexMan.GetTexture (fromname, FTexture::TEX_Flat, FTextureManager::TEXMAN_Overridable);
 		picnum2 = TexMan.GetTexture (toname, FTexture::TEX_Flat, FTextureManager::TEXMAN_Overridable);
 
-		for (int i = 0; i < numsectors; ++i)
+		for (auto &sec : level.sectors)
 		{
-			sector_t *sec = &sectors[i];
+			if (!(flags & NOT_FLOOR) && sec.GetTexture(sector_t::floor) == picnum1) 
-
+				sec.SetTexture(sector_t::floor, picnum2);
-			if (!(flags & NOT_FLOOR) && sec->GetTexture(sector_t::floor) == picnum1) 
+			if (!(flags & NOT_CEILING) && sec.GetTexture(sector_t::ceiling) == picnum1)	
-				sec->SetTexture(sector_t::floor, picnum2);
+				sec.SetTexture(sector_t::ceiling, picnum2);
-			if (!(flags & NOT_CEILING) && sec->GetTexture(sector_t::ceiling) == picnum1)	
-				sec->SetTexture(sector_t::ceiling, picnum2);
 		}
 	}
 }
@@ -5150,7 +5148,7 @@ int DLevelScript::CallFunction(int argCount, int funcIndex, SDWORD *args)
 					int s;
 					while ((s = it.Next()) >= 0)
 					{
-						SN_StartSequence(&sectors[s], args[2], seqname, 0);
+						SN_StartSequence(&level.sectors[s], args[2], seqname, 0);
 					}
 				}
 			}
@@ -5922,7 +5920,7 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 				int s;
 				while ((s = it.Next()) >= 0)
 				{
-					sector_t *sec = &sectors[s];
+					sector_t *sec = &level.sectors[s];
 
 					sec->damageamount = args[1];
 					sec->damagetype = argCount >= 3 ? FName(FBehavior::StaticLookupString(args[2])) : FName(NAME_None);
@@ -5942,7 +5940,7 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 					int s;
 					while ((s = it.Next()) >= 0)
 					{
-						sectors[s].terrainnum[args[1]] = terrain;
+						level.sectors[s].terrainnum[args[1]] = terrain;
 					}
 				}
 			}
@@ -6083,8 +6081,8 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 			int s;
 			while ((s = it.Next()) >= 0)
 			{
-				sectors[s].planes[which].GlowColor = color;
+				level.sectors[s].planes[which].GlowColor = color;
-				sectors[s].planes[which].GlowHeight = height;
+				level.sectors[s].planes[which].GlowHeight = height;
 			}
 			break;
 		}
@@ -6096,8 +6094,9 @@ doplaysound:			if (funcIndex == ACSF_PlayActorSound)
 			int d = clamp(args[1]/2, 0, 255);
 			while ((s = it.Next()) >= 0)
 			{
-				auto f = sectors[s].ColorMap->Fade;
+				auto &sec = level.sectors[s];
-				sectors[s].ColorMap = GetSpecialLights(sectors[s].ColorMap->Color, PalEntry(d, f.r, f.g, f.b), sectors[s].ColorMap->Desaturate);
+				auto f = sec.ColorMap->Fade;
+				sec.ColorMap = GetSpecialLights(sec.ColorMap->Color, PalEntry(d, f.r, f.g, f.b), sec.ColorMap->Desaturate);
 			}
 			break;
 		}
@@ -6227,7 +6226,7 @@ int DLevelScript::RunScript ()
 		FSectorTagIterator it(statedata);
 		while ((secnum = it.Next()) >= 0)
 		{
-			if (sectors[secnum].floordata || sectors[secnum].ceilingdata)
+			if (level.sectors[secnum].floordata || level.sectors[secnum].ceilingdata)
 				return resultValue;
 		}
 
@@ -8838,17 +8837,17 @@ scriptwait:
 				if (tag != 0)
 					secnum = P_FindFirstSectorFromTag (tag);
 				else
-					secnum = int(P_PointInSector (x, y) - sectors);
+					secnum = P_PointInSector (x, y)->sectornum;
 
 				if (secnum >= 0)
 				{
 					if (pcd == PCD_GETSECTORFLOORZ)
 					{
-						z = sectors[secnum].floorplane.ZatPoint (x, y);
+						z = level.sectors[secnum].floorplane.ZatPoint (x, y);
 					}
 					else
 					{
-						z = sectors[secnum].ceilingplane.ZatPoint (x, y);
+						z = level.sectors[secnum].ceilingplane.ZatPoint (x, y);
 					}
 				}
 				sp -= 2;
@@ -8863,7 +8862,7 @@ scriptwait:
 
 				if (secnum >= 0)
 				{
-					z = sectors[secnum].lightlevel;
+					z = level.sectors[secnum].lightlevel;
 				}
 				STACK(1) = z;
 			}

src/p_buildmap.cpp

@@ -142,7 +142,7 @@ void P_AdjustLine (line_t *line);
 // PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
 
 static bool P_LoadBloodMap (BYTE *data, size_t len, FMapThing **sprites, int *numsprites);
-static void LoadSectors (sectortype *bsectors);
+static void LoadSectors (sectortype *bsectors, int count);
 static void LoadWalls (walltype *walls, int numwalls, sectortype *bsectors);
 static int LoadSprites (spritetype *sprites, Xsprite *xsprites, int numsprites, sectortype *bsectors, FMapThing *mapthings);
 static vertex_t *FindVertex (SDWORD x, SDWORD y);
@@ -225,15 +225,14 @@ bool P_LoadBuildMap (BYTE *data, size_t len, FMapThing **sprites, int *numspr)
 		return false;
 	}
 
-	numsectors = numsec;
+	LoadSectors ((sectortype *)(data + 22), numsec);
-	LoadSectors ((sectortype *)(data + 22));
+	LoadWalls ((walltype *)(data + 24 + numsec*sizeof(sectortype)), numwalls,
-	LoadWalls ((walltype *)(data + 24 + numsectors*sizeof(sectortype)), numwalls,
 		(sectortype *)(data + 22));
 
-	numsprites = *(WORD *)(data + 24 + numsectors*sizeof(sectortype) + numwalls*sizeof(walltype));
+	numsprites = *(WORD *)(data + 24 + numsec*sizeof(sectortype) + numwalls*sizeof(walltype));
 	*sprites = new FMapThing[numsprites + 1];
 	CreateStartSpot ((SDWORD *)(data + 4), *sprites);
-	*numspr = 1 + LoadSprites ((spritetype *)(data + 26 + numsectors*sizeof(sectortype) + numwalls*sizeof(walltype)),
+	*numspr = 1 + LoadSprites ((spritetype *)(data + 26 + numsec*sizeof(sectortype) + numwalls*sizeof(walltype)),
 		NULL, numsprites, (sectortype *)(data + 22), *sprites + 1);
 
 	return true;
@@ -274,7 +273,7 @@ static bool P_LoadBloodMap (BYTE *data, size_t len, FMapThing **mapthings, int *
 	visibility = LittleLong(*(DWORD *)(infoBlock + 18));
 	parallaxType = infoBlock[26];
 	numRevisions = LittleLong(*(DWORD *)(infoBlock + 27));
-	numsectors = LittleShort(*(WORD *)(infoBlock + 31));
+	int numsectors = LittleShort(*(WORD *)(infoBlock + 31));
 	numWalls = LittleShort(*(WORD *)(infoBlock + 33));
 	numsprites = LittleShort(*(WORD *)(infoBlock + 35));
 	Printf("Visibility: %d\n", visibility);
@@ -364,7 +363,7 @@ static bool P_LoadBloodMap (BYTE *data, size_t len, FMapThing **mapthings, int *
 
 	// Now convert to Doom format, since we've extracted all the standard
 	// BUILD info from the map we need. (Sprites are ignored.)
-	LoadSectors (bsec);
+	LoadSectors (bsec, numsectors);
 	LoadWalls (bwal, numWalls, bsec);
 	*mapthings = new FMapThing[numsprites];
 	*numspr = LoadSprites (bspr, xspr, numsprites, bsec, *mapthings);
@@ -383,25 +382,26 @@ static bool P_LoadBloodMap (BYTE *data, size_t len, FMapThing **mapthings, int *
 //
 //==========================================================================
 
-static void LoadSectors (sectortype *bsec)
+static void LoadSectors (sectortype *bsec, int count)
 {
 	FDynamicColormap *map = GetSpecialLights (PalEntry (255,255,255), level.fadeto, 0);
 	sector_t *sec;
 	char tnam[9];
 
-	sec = sectors = new sector_t[numsectors];
+	level.sectors.Alloc(count);
-	memset (sectors, 0, sizeof(sector_t)*numsectors);
+	sec = &level.sectors[0];
+	memset (sec, 0, sizeof(sector_t)*count);
 
-	sectors[0].e = new extsector_t[numsectors];
+	sec->e = new extsector_t[count];
 
-	for (int i = 0; i < numsectors; ++i, ++bsec, ++sec)
+	for (int i = 0; i < count; ++i, ++bsec, ++sec)
 	{
 		bsec->wallptr = WORD(bsec->wallptr);
 		bsec->wallnum = WORD(bsec->wallnum);
 		bsec->ceilingstat = WORD(bsec->ceilingstat);
 		bsec->floorstat = WORD(bsec->floorstat);
 
-		sec->e = &sectors[0].e[i];
+		sec->e = &sec->e[i];
 		double floorheight = -LittleLong(bsec->floorZ) / 256.;
 		sec->SetPlaneTexZ(sector_t::floor, floorheight);
 		sec->floorplane.SetAtHeight(floorheight, sector_t::floor);
@@ -496,13 +496,13 @@ static void LoadWalls (walltype *walls, int numwalls, sectortype *bsec)
 	numvertexes = 0;
 
 	// First mark each sidedef with the sector it belongs to
-	for (i = 0; i < numsectors; ++i)
+	for (unsigned i = 0; i < level.sectors.Size(); i++)
 	{
 		if (bsec[i].wallptr >= 0)
 		{
 			for (j = 0; j < bsec[i].wallnum; ++j)
 			{
-				sides[j + bsec[i].wallptr].sector = sectors + i;
+				sides[j + bsec[i].wallptr].sector = &level.sectors[i];
 			}
 		}
 	}
@@ -581,7 +581,7 @@ static void LoadWalls (walltype *walls, int numwalls, sectortype *bsec)
 		lines[j].flags |= ML_WRAP_MIDTEX;
 		if (walls[i].nextsector >= 0)
 		{
-			lines[j].backsector = sectors + walls[i].nextsector;
+			lines[j].backsector = &level.sectors[walls[i].nextsector];
 			lines[j].flags |= ML_TWOSIDED;
 		}
 		else
@@ -629,7 +629,7 @@ static void LoadWalls (walltype *walls, int numwalls, sectortype *bsec)
 	}
 
 	// Finish setting sector properties that depend on walls
-	for (i = 0; i < numsectors; ++i, ++bsec)
+	for (auto &sec : level.sectors)
 	{
 		SlopeWork slope;
 
@@ -646,13 +646,13 @@ static void LoadWalls (walltype *walls, int numwalls, sectortype *bsec)
 		{ // floor is sloped
 			slope.heinum = -LittleShort(bsec->floorheinum);
 			slope.z[0] = slope.z[1] = slope.z[2] = -bsec->floorZ;
-			CalcPlane (slope, sectors[i].floorplane);
+			CalcPlane (slope, sec.floorplane);
 		}
 		if ((bsec->ceilingstat & 2) && (bsec->ceilingheinum != 0))
 		{ // ceiling is sloped
 			slope.heinum = -LittleShort(bsec->ceilingheinum);
 			slope.z[0] = slope.z[1] = slope.z[2] = -bsec->ceilingZ;
-			CalcPlane (slope, sectors[i].ceilingplane);
+			CalcPlane (slope, sec.ceilingplane);
 		}
 		int linenum = int(intptr_t(sides[bsec->wallptr].linedef));
 		int sidenum = int(intptr_t(lines[linenum].sidedef[1]));

src/p_ceiling.cpp

@@ -498,7 +498,7 @@ bool EV_DoCeiling (DCeiling::ECeiling type, line_t *line,
 	{
 		if (!line || !(sec = line->backsector))
 			return rtn;
-		secnum = (int)(sec-sectors);
+		secnum = sec->sectornum;
 		// [RH] Hack to let manual crushers be retriggerable, too
 		tag ^= secnum | 0x1000000;
 		P_ActivateInStasisCeiling (tag);
@@ -516,7 +516,7 @@ bool EV_DoCeiling (DCeiling::ECeiling type, line_t *line,
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		rtn |= P_CreateCeiling(&sectors[secnum], type, line, tag, speed, speed2, height, crush, silent, change, hexencrush);
+		rtn |= P_CreateCeiling(&level.sectors[secnum], type, line, tag, speed, speed2, height, crush, silent, change, hexencrush);
 	}
 	return rtn;
 }

src/p_doors.cpp

@@ -441,7 +441,7 @@ bool EV_DoDoor (DDoor::EVlDoor type, line_t *line, AActor *thing,
 
 		// get the sector on the second side of activating linedef
 		sec = line->sidedef[1]->sector;
-		secnum = int(sec-sectors);
+		secnum = sec->sectornum;
 
 		// if door already has a thinker, use it
 		if (sec->PlaneMoving(sector_t::ceiling))
@@ -493,7 +493,7 @@ bool EV_DoDoor (DDoor::EVlDoor type, line_t *line, AActor *thing,
 		FSectorTagIterator it(tag);
 		while ((secnum = it.Next()) >= 0)
 		{
-			sec = &sectors[secnum];
+			sec = &level.sectors[secnum];
 			// if the ceiling is already moving, don't start the door action
 			if (sec->PlaneMoving(sector_t::ceiling))
 				continue;
@@ -782,7 +782,7 @@ bool EV_SlidingDoor (line_t *line, AActor *actor, int tag, int speed, int delay)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sec = &sectors[secnum];
+		sec = &level.sectors[secnum];
 		if (sec->ceilingdata != NULL)
 		{
 			continue;

src/p_effect.cpp

@@ -350,7 +350,7 @@ void P_RunEffects ()
 {
 	if (players[consoleplayer].camera == NULL) return;
 
-	int	pnum = int(players[consoleplayer].camera->Sector - sectors) * numsectors;
+	int	pnum = players[consoleplayer].camera->Sector->Index() * level.sectors.Size();
 
 	AActor *actor;
 	TThinkerIterator<AActor> iterator;
@@ -360,7 +360,7 @@ void P_RunEffects ()
 		if (actor->effects)
 		{
 			// Only run the effect if the actor is potentially visible
-			int rnum = pnum + int(actor->Sector - sectors);
+			int rnum = pnum + actor->Sector->Index();
 			if (rejectmatrix == NULL || !(rejectmatrix[rnum>>3] & (1 << (rnum & 7))))
 				P_RunEffect (actor, actor->effects);
 		}

src/p_floor.cpp

@@ -185,19 +185,19 @@ void DFloor::Tick ()
 				sector_t *sec = m_Sector;
 				sec->stairlock = -1;				// thinker done, promote lock to -1
 
-				while (sec->prevsec != -1 && sectors[sec->prevsec].stairlock != -2)
+				while (sec->prevsec != -1 && level.sectors[sec->prevsec].stairlock != -2)
-					sec = &sectors[sec->prevsec];	// search for a non-done thinker
+					sec = &level.sectors[sec->prevsec];	// search for a non-done thinker
 				if (sec->prevsec == -1)				// if all thinkers previous are done
 				{
 					sec = m_Sector;			// search forward
-					while (sec->nextsec != -1 && sectors[sec->nextsec].stairlock != -2) 
+					while (sec->nextsec != -1 && level.sectors[sec->nextsec].stairlock != -2)
-						sec = &sectors[sec->nextsec];
+						sec = &level.sectors[sec->nextsec];
 					if (sec->nextsec == -1)			// if all thinkers ahead are done too
 					{
 						while (sec->prevsec != -1)	// clear all locks
 						{
 							sec->stairlock = 0;
-							sec = &sectors[sec->prevsec];
+							sec = &level.sectors[sec->prevsec];
 						}
 						sec->stairlock = 0;
 					}
@@ -528,7 +528,7 @@ bool EV_DoFloor (DFloor::EFloor floortype, line_t *line, int tag,
 	FSectorTagIterator it(tag, line);
 	while ((secnum = it.Next()) >= 0)
 	{
-		rtn |= P_CreateFloor(&sectors[secnum], floortype, line, speed, height, crush, change, hexencrush, hereticlower);
+		rtn |= P_CreateFloor(&level.sectors[secnum], floortype, line, speed, height, crush, change, hexencrush, hereticlower);
 	}
 	return rtn;
 }
@@ -547,7 +547,7 @@ bool EV_FloorCrushStop (int tag)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sec = sectors + secnum;
+		sector_t *sec = &level.sectors[secnum];
 
 		if (sec->floordata && sec->floordata->IsKindOf (RUNTIME_CLASS(DFloor)) &&
 			barrier_cast<DFloor *>(sec->floordata)->m_Type == DFloor::floorRaiseAndCrush)
@@ -602,7 +602,7 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 	bool compatible = tag != 0 && (i_compatflags & COMPATF_STAIRINDEX);
 	while ((secnum = itr.NextCompat(compatible, secnum)) >= 0)
 	{
-		sec = &sectors[secnum];
+		sec = &level.sectors[secnum];
 
 		// ALREADY MOVING?	IF SO, KEEP GOING...
 		//jff 2/26/98 add special lockout condition to wait for entire
@@ -664,7 +664,7 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 					}
 					
 				}
-				newsecnum = (int)(tsec - sectors);
+				newsecnum = tsec->sectornum;
 			}
 			else
 			{
@@ -674,14 +674,14 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 						continue;
 
 					tsec = line->frontsector;
-					newsecnum = (int)(tsec-sectors);
+					newsecnum = tsec->sectornum;
 
 					if (secnum != newsecnum)
 						continue;
 
 					tsec = line->backsector;
 					if (!tsec) continue;	//jff 5/7/98 if no backside, continue
-					newsecnum = (int)(tsec - sectors);
+					newsecnum = tsec->sectornum;
 
 					if (!igntxt && tsec->GetTexture(sector_t::floor) != texture)
 						continue;
@@ -746,7 +746,7 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 		} while (ok);
 		// [RH] make sure the first sector doesn't point to a previous one, otherwise
 		// it can infinite loop when the first sector stops moving.
-		sectors[osecnum].prevsec = -1;	
+		level.sectors[osecnum].prevsec = -1;
 	}
 	return rtn;
 }
@@ -773,7 +773,7 @@ bool EV_DoDonut (int tag, line_t *line, double pillarspeed, double slimespeed)
 	FSectorTagIterator itr(tag, line);
 	while ((secnum = itr.Next()) >= 0)
 	{
-		s1 = &sectors[secnum];					// s1 is pillar's sector
+		s1 = &level.sectors[secnum];					// s1 is pillar's sector
 
 		// ALREADY MOVING?	IF SO, KEEP GOING...
 		if (s1->PlaneMoving(sector_t::floor))
@@ -990,7 +990,7 @@ bool EV_DoElevator (line_t *line, DElevator::EElevator elevtype,
 	// act on all sectors with the same tag as the triggering linedef
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sec = &sectors[secnum];
+		sec = &level.sectors[secnum];
 		// If either floor or ceiling is already activated, skip it
 		if (sec->PlaneMoving(sector_t::floor) || sec->ceilingdata) //jff 2/22/98
 			continue; // the loop used to break at the end if tag were 0, but would miss that step if "continue" occured [FDARI]
@@ -1083,7 +1083,7 @@ bool EV_DoChange (line_t *line, EChange changetype, int tag)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sec = &sectors[secnum];
+		sec = &level.sectors[secnum];
               
 		rtn = true;
 
@@ -1298,7 +1298,7 @@ bool EV_StartWaggle (int tag, line_t *line, int height, int speed, int offset,
 
 	while ((sectorIndex = itr.Next()) >= 0)
 	{
-		sector = &sectors[sectorIndex];
+		sector = &level.sectors[sectorIndex];
 		if ((!ceiling && sector->PlaneMoving(sector_t::floor)) || 
 			(ceiling && sector->PlaneMoving(sector_t::ceiling)))
 		{ // Already busy with another thinker

src/p_lights.cpp

@@ -324,7 +324,7 @@ void EV_StartLightFlickering (int tag, int upper, int lower)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		new DFlicker (&sectors[secnum], upper, lower);
+		new DFlicker (&level.sectors[secnum], upper, lower);
 	}
 }
 
@@ -501,7 +501,7 @@ void EV_StartLightStrobing (int tag, int upper, int lower, int utics, int ltics)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sec = &sectors[secnum];
+		sector_t *sec = &level.sectors[secnum];
 		if (sec->lightingdata)
 			continue;
 		
@@ -515,7 +515,7 @@ void EV_StartLightStrobing (int tag, int utics, int ltics)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sec = &sectors[secnum];
+		sector_t *sec = &level.sectors[secnum];
 		if (sec->lightingdata)
 			continue;
 		
@@ -537,7 +537,7 @@ void EV_TurnTagLightsOff (int tag)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sector = sectors + secnum;
+		sector_t *sector = &level.sectors[secnum];
 		int min = sector->lightlevel;
 
 		for (auto ln : sector->Lines)
@@ -566,7 +566,7 @@ void EV_LightTurnOn (int tag, int bright)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sector = sectors + secnum;
+		sector_t *sector = &level.sectors[secnum];
 		int tbright = bright; //jff 5/17/98 search for maximum PER sector
 
 		// bright = -1 means to search ([RH] Not 0)
@@ -619,7 +619,7 @@ void EV_LightTurnOnPartway (int tag, double frac)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *temp, *sector = &sectors[secnum];
+		sector_t *temp, *sector = &level.sectors[secnum];
 		int bright = 0, min = sector->lightlevel;
 
 		for (auto ln : sector->Lines)
@@ -655,7 +655,7 @@ void EV_LightChange (int tag, int value)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sectors[secnum].SetLightLevel(sectors[secnum].lightlevel + value);
+		level.sectors[secnum].SetLightLevel(level.sectors[secnum].lightlevel + value);
 	}
 }
 
@@ -821,7 +821,7 @@ void EV_StartLightGlowing (int tag, int upper, int lower, int tics)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sec = &sectors[secnum];
+		sector_t *sec = &level.sectors[secnum];
 		if (sec->lightingdata)
 			continue;
 		
@@ -841,7 +841,7 @@ void EV_StartLightFading (int tag, int value, int tics)
 	FSectorTagIterator it(tag);
 	while ((secnum = it.Next()) >= 0)
 	{
-		sector_t *sec = &sectors[secnum];
+		sector_t *sec = &level.sectors[secnum];
 		if (sec->lightingdata)
 			continue;
 

src/p_linkedsectors.cpp

@@ -322,9 +322,9 @@ bool P_AddSectorLinks(sector_t *control, int tag, INTBOOL ceiling, int movetype)
 		while ((sec = itr.Next()) >= 0)
 		{
 			// Don't attach to self!
-			if (control != &sectors[sec])
+			if (control != &level.sectors[sec])
 			{
-				AddSingleSector(scrollplane, &sectors[sec], movetype);
+				AddSingleSector(scrollplane, &level.sectors[sec], movetype);
 			}
 		}
 	}

src/p_lnspec.cpp

@@ -2163,7 +2163,7 @@ FUNC(LS_Sector_ChangeSound)
 	FSectorTagIterator itr(arg0);
 	while ((secNum = itr.Next()) >= 0)
 	{
-		sectors[secNum].seqType = arg1;
+		level.sectors[secNum].seqType = arg1;
 		rtn = true;
 	}
 	return rtn;
@@ -2185,7 +2185,7 @@ FUNC(LS_Sector_ChangeFlags)
 	arg2 &= ~SECF_NOMODIFY;
 	while ((secNum = itr.Next()) >= 0)
 	{
-		sectors[secNum].Flags = (sectors[secNum].Flags | arg1) & ~arg2;
+		level.sectors[secNum].Flags = (level.sectors[secNum].Flags | arg1) & ~arg2;
 		rtn = true;
 	}
 	return rtn;
@@ -2231,8 +2231,8 @@ FUNC(LS_Sector_SetTranslucent)
 		FSectorTagIterator itr(arg0);
 		while ((secnum = itr.Next()) >= 0)
 		{
-			sectors[secnum].SetAlpha(arg1, clamp(arg2, 0, 255) / 255.);
+			level.sectors[secnum].SetAlpha(arg1, clamp(arg2, 0, 255) / 255.);
-			sectors[secnum].ChangeFlags(arg1, ~PLANEF_ADDITIVE, arg3? PLANEF_ADDITIVE:0);
+			level.sectors[secnum].ChangeFlags(arg1, ~PLANEF_ADDITIVE, arg3? PLANEF_ADDITIVE:0);
 		}
 		return true;
 	}
@@ -2247,7 +2247,7 @@ FUNC(LS_Sector_SetLink)
 		int control = P_FindFirstSectorFromTag(arg0);
 		if (control >= 0)
 		{
-			return P_AddSectorLinks(&sectors[control], arg1, arg2, arg3);
+			return P_AddSectorLinks(&level.sectors[control], arg1, arg2, arg3);
 		}
 	}
 	return false;
@@ -2367,10 +2367,10 @@ FUNC(LS_Sector_SetDamage)
 				arg3 = 1;
 			}
 		}
-		sectors[secnum].damageamount = (short)arg1;
+		level.sectors[secnum].damageamount = (short)arg1;
-		sectors[secnum].damagetype = MODtoDamageType(arg2);
+		level.sectors[secnum].damagetype = MODtoDamageType(arg2);
-		sectors[secnum].damageinterval = (short)arg3;
+		level.sectors[secnum].damageinterval = (short)arg3;
-		sectors[secnum].leakydamage = (short)arg4;
+		level.sectors[secnum].leakydamage = (short)arg4;
 	}
 	return true;
 }
@@ -2387,7 +2387,7 @@ FUNC(LS_Sector_SetGravity)
 	FSectorTagIterator itr(arg0);
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
-		sectors[secnum].gravity = gravity;
+		level.sectors[secnum].gravity = gravity;
 
 	return true;
 }
@@ -2399,7 +2399,7 @@ FUNC(LS_Sector_SetColor)
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sectors[secnum].SetColor(arg1, arg2, arg3, arg4);
+		level.sectors[secnum].SetColor(arg1, arg2, arg3, arg4);
 	}
 
 	return true;
@@ -2412,7 +2412,7 @@ FUNC(LS_Sector_SetFade)
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sectors[secnum].SetFade(arg1, arg2, arg3);
+		level.sectors[secnum].SetFade(arg1, arg2, arg3);
 	}
 	return true;
 }
@@ -2427,8 +2427,8 @@ FUNC(LS_Sector_SetCeilingPanning)
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sectors[secnum].SetXOffset(sector_t::ceiling, xofs);
+		level.sectors[secnum].SetXOffset(sector_t::ceiling, xofs);
-		sectors[secnum].SetYOffset(sector_t::ceiling, yofs);
+		level.sectors[secnum].SetYOffset(sector_t::ceiling, yofs);
 	}
 	return true;
 }
@@ -2443,8 +2443,8 @@ FUNC(LS_Sector_SetFloorPanning)
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sectors[secnum].SetXOffset(sector_t::floor, xofs);
+		level.sectors[secnum].SetXOffset(sector_t::floor, xofs);
-		sectors[secnum].SetYOffset(sector_t::floor, yofs);
+		level.sectors[secnum].SetYOffset(sector_t::floor, yofs);
 	}
 	return true;
 }
@@ -2465,9 +2465,9 @@ FUNC(LS_Sector_SetFloorScale)
 	while ((secnum = itr.Next()) >= 0)
 	{
 		if (xscale)
-			sectors[secnum].SetXScale(sector_t::floor, xscale);
+			level.sectors[secnum].SetXScale(sector_t::floor, xscale);
 		if (yscale)
-			sectors[secnum].SetYScale(sector_t::floor, yscale);
+			level.sectors[secnum].SetYScale(sector_t::floor, yscale);
 	}
 	return true;
 }
@@ -2488,9 +2488,9 @@ FUNC(LS_Sector_SetCeilingScale)
 	while ((secnum = itr.Next()) >= 0)
 	{
 		if (xscale)
-			sectors[secnum].SetXScale(sector_t::ceiling, xscale);
+			level.sectors[secnum].SetXScale(sector_t::ceiling, xscale);
 		if (yscale)
-			sectors[secnum].SetYScale(sector_t::ceiling, yscale);
+			level.sectors[secnum].SetYScale(sector_t::ceiling, yscale);
 	}
 	return true;
 }
@@ -2510,9 +2510,9 @@ FUNC(LS_Sector_SetFloorScale2)
 	while ((secnum = itr.Next()) >= 0)
 	{
 		if (arg1)
-			sectors[secnum].SetXScale(sector_t::floor, xscale);
+			level.sectors[secnum].SetXScale(sector_t::floor, xscale);
 		if (arg2)
-			sectors[secnum].SetYScale(sector_t::floor, yscale);
+			level.sectors[secnum].SetYScale(sector_t::floor, yscale);
 	}
 	return true;
 }
@@ -2532,9 +2532,9 @@ FUNC(LS_Sector_SetCeilingScale2)
 	while ((secnum = itr.Next()) >= 0)
 	{
 		if (arg1)
-			sectors[secnum].SetXScale(sector_t::ceiling, xscale);
+			level.sectors[secnum].SetXScale(sector_t::ceiling, xscale);
 		if (arg2)
-			sectors[secnum].SetYScale(sector_t::ceiling, yscale);
+			level.sectors[secnum].SetYScale(sector_t::ceiling, yscale);
 	}
 	return true;
 }
@@ -2549,8 +2549,8 @@ FUNC(LS_Sector_SetRotation)
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sectors[secnum].SetAngle(sector_t::floor, floor);
+		level.sectors[secnum].SetAngle(sector_t::floor, floor);
-		sectors[secnum].SetAngle(sector_t::ceiling, ceiling);
+		level.sectors[secnum].SetAngle(sector_t::ceiling, ceiling);
 	}
 	return true;
 }
@@ -3151,7 +3151,7 @@ FUNC(LS_ClearForceField)
 	int secnum;
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sector_t *sec = &sectors[secnum];
+		sector_t *sec = &level.sectors[secnum];
 		rtn = true;
 
 		sec->RemoveForceField();

src/p_mobj.cpp

@@ -3961,9 +3961,9 @@ void AActor::Tick ()
 				sector_t *sec = node->m_sector;
 				DVector2 scrollv;
 
-				if (level.Scrolls.Size() > unsigned(sec-sectors))
+				if (level.Scrolls.Size() > unsigned(sec->Index()))
 				{
-					scrollv = level.Scrolls[sec - sectors];
+					scrollv = level.Scrolls[sec->Index()];
 				}
 				else
 				{
@@ -5251,9 +5251,9 @@ APlayerPawn *P_SpawnPlayer (FPlayerStart *mthing, int playernum, int flags)
 			{
 				if (th->LastHeard == oldactor) th->LastHeard = NULL;
 			}
-			for(int i = 0; i < numsectors; i++)
+			for(auto &sec : level.sectors)
 			{
-				if (sectors[i].SoundTarget == oldactor) sectors[i].SoundTarget = NULL;
+				if (sec.SoundTarget == oldactor) sec.SoundTarget = nullptr;
 			}
 
 			DObject::StaticPointerSubstitution (oldactor, p->mo);

src/p_pillar.cpp

@@ -220,7 +220,7 @@ bool EV_DoPillar (DPillar::EPillar type, line_t *line, int tag,
 	FSectorTagIterator itr(tag, line);
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sec = &sectors[secnum];
+		sec = &level.sectors[secnum];
 
 		if (sec->PlaneMoving(sector_t::floor) || sec->PlaneMoving(sector_t::ceiling))
 			continue;

src/p_plats.cpp

@@ -243,7 +243,7 @@ bool EV_DoPlat (int tag, line_t *line, DPlat::EPlatType type, double height,
 	FSectorTagIterator itr(tag, line);
 	while ((secnum = itr.Next()) >= 0)
 	{
-		sec = &sectors[secnum];
+		sec = &level.sectors[secnum];
 
 		if (sec->PlaneMoving(sector_t::floor))
 		{

src/p_pusher.cpp

@@ -192,7 +192,7 @@ void DPusher::Tick ()
 	if (!var_pushers)
 		return;
 
-	sec = sectors + m_Affectee;
+	sec = &level.sectors[m_Affectee];
 
 	// Be sure the special sector type is still turned on. If so, proceed.
 	// Else, bail out; the sector type has been changed on us.
@@ -339,7 +339,7 @@ AActor *P_GetPushThing (int s)
 	AActor* thing;
 	sector_t* sec;
 
-	sec = sectors + s;
+	sec = &level.sectors[s];
 	thing = sec->thinglist;
 
 	while (thing &&
@@ -406,8 +406,7 @@ void P_SpawnPushers ()
 					if (thing->GetClass()->TypeName == NAME_PointPusher ||
 						thing->GetClass()->TypeName == NAME_PointPuller)
 					{
-						new DPusher (DPusher::p_push, l->args[3] ? l : NULL, l->args[2],
+						new DPusher (DPusher::p_push, l->args[3] ? l : NULL, l->args[2], 0, thing, thing->Sector->Index());
-									 0, thing, int(thing->Sector - sectors));
 					}
 				}
 			}
@@ -447,7 +446,7 @@ void AdjustPusher (int tag, int magnitude, int angle, bool wind)
 		unsigned int i;
 		for (i = 0; i < numcollected; i++)
 		{
-			if (Collection[i].RefNum == sectors[secnum].sectornum)
+			if (Collection[i].RefNum == secnum)
 				break;
 		}
 		if (i == numcollected)

src/p_saveg.cpp

@@ -281,7 +281,7 @@ FSerializer &Serialize(FSerializer &arc, const char *key, sector_t &p, sector_t
 		{
 			if (level.Scrolls.Size() == 0)
 			{
-				level.Scrolls.Resize(numsectors);
+				level.Scrolls.Resize(level.sectors.Size());
 				memset(&level.Scrolls[0], 0, sizeof(level.Scrolls[0])*level.Scrolls.Size());
 				level.Scrolls[p.sectornum] = scroll;
 			}
@@ -900,7 +900,7 @@ void G_SerializeLevel(FSerializer &arc, bool hubload)
 		arc.Array("checksum", chk, 16);
 		if (arc.GetSize("linedefs") != (unsigned)numlines ||
 			arc.GetSize("sidedefs") != (unsigned)numsides ||
-			arc.GetSize("sectors") != (unsigned)numsectors ||
+			arc.GetSize("sectors") != level.sectors.Size() ||
 			arc.GetSize("polyobjs") != (unsigned)po_NumPolyobjs ||
 			memcmp(chk, level.md5, 16))
 		{
@@ -954,7 +954,7 @@ void G_SerializeLevel(FSerializer &arc, bool hubload)
 	// The order here is important: First world state, then portal state, then thinkers, and last polyobjects.
 	arc.Array("linedefs", lines, &loadlines[0], numlines);
 	arc.Array("sidedefs", sides, &loadsides[0], numsides);
-	arc.Array("sectors", sectors, &loadsectors[0], numsectors);
+	arc.Array("sectors", &level.sectors[0], &loadsectors[0], level.sectors.Size());
 	arc("zones", Zones);
 	arc("lineportals", linePortals);
 	arc("sectorportals", sectorPortals);
@@ -972,9 +972,9 @@ void G_SerializeLevel(FSerializer &arc, bool hubload)
 
 	if (arc.isReading())
 	{
-		for (int i = 0; i < numsectors; i++)
+		for (auto &sec : level.sectors)
 		{
-			P_Recalculate3DFloors(&sectors[i]);
+			P_Recalculate3DFloors(&sec);
 		}
 		for (int i = 0; i < MAXPLAYERS; ++i)
 		{

src/p_scroll.cpp

@@ -168,8 +168,8 @@ void DScroller::Tick ()
 
 	if (m_Control != -1)
 	{	// compute scroll amounts based on a sector's height changes
-		double height = sectors[m_Control].CenterFloor () +
+		double height = level.sectors[m_Control].CenterFloor () +
-						 sectors[m_Control].CenterCeiling ();
+			level.sectors[m_Control].CenterCeiling ();
 		double delta = height - m_LastHeight;
 		m_LastHeight = height;
 		dx *= delta;
@@ -208,15 +208,15 @@ void DScroller::Tick ()
 			break;
 
 		case EScroll::sc_floor:						// killough 3/7/98: Scroll floor texture
-			RotationComp(&sectors[m_Affectee], sector_t::floor, dx, dy, tdx, tdy);
+			RotationComp(&level.sectors[m_Affectee], sector_t::floor, dx, dy, tdx, tdy);
-			sectors[m_Affectee].AddXOffset(sector_t::floor, tdx);
+			level.sectors[m_Affectee].AddXOffset(sector_t::floor, tdx);
-			sectors[m_Affectee].AddYOffset(sector_t::floor, tdy);
+			level.sectors[m_Affectee].AddYOffset(sector_t::floor, tdy);
 			break;
 
 		case EScroll::sc_ceiling:					// killough 3/7/98: Scroll ceiling texture
-			RotationComp(&sectors[m_Affectee], sector_t::ceiling, dx, dy, tdx, tdy);
+			RotationComp(&level.sectors[m_Affectee], sector_t::ceiling, dx, dy, tdx, tdy);
-			sectors[m_Affectee].AddXOffset(sector_t::ceiling, tdx);
+			level.sectors[m_Affectee].AddXOffset(sector_t::ceiling, tdx);
-			sectors[m_Affectee].AddYOffset(sector_t::ceiling, tdy);
+			level.sectors[m_Affectee].AddYOffset(sector_t::ceiling, tdy);
 			break;
 
 		// [RH] Don't actually carry anything here. That happens later.
@@ -262,8 +262,10 @@ DScroller::DScroller (EScroll type, double dx, double dy,
 	m_vdx = m_vdy = 0;
 	m_LastHeight = 0;
 	if ((m_Control = control) != -1)
+	{
 		m_LastHeight =
-			sectors[control].CenterFloor () + sectors[control].CenterCeiling ();
+			level.sectors[control].CenterFloor() + level.sectors[control].CenterCeiling();
+	}
 	m_Affectee = affectee;
 	m_Interpolations[0] = m_Interpolations[1] = m_Interpolations[2] = NULL;
 
@@ -291,11 +293,11 @@ DScroller::DScroller (EScroll type, double dx, double dy,
 		break;
 
 	case EScroll::sc_floor:
-		m_Interpolations[0] = sectors[affectee].SetInterpolation(sector_t::FloorScroll, false);
+		m_Interpolations[0] = level.sectors[affectee].SetInterpolation(sector_t::FloorScroll, false);
 		break;
 
 	case EScroll::sc_ceiling:
-		m_Interpolations[0] = sectors[affectee].SetInterpolation(sector_t::CeilingScroll, false);
+		m_Interpolations[0] = level.sectors[affectee].SetInterpolation(sector_t::CeilingScroll, false);
 		break;
 
 	default:
@@ -346,7 +348,7 @@ DScroller::DScroller (double dx, double dy, const line_t *l,
 	m_Parts = scrollpos;
 	m_LastHeight = 0;
 	if ((m_Control = control) != -1)
-		m_LastHeight = sectors[control].CenterFloor() + sectors[control].CenterCeiling();
+		m_LastHeight = level.sectors[control].CenterFloor() + level.sectors[control].CenterCeiling();
 	m_Affectee = int(l->sidedef[0] - sides);
 	sides[m_Affectee].Flags |= WALLF_NOAUTODECALS;
 	m_Interpolations[0] = m_Interpolations[1] = m_Interpolations[2] = NULL;
@@ -439,7 +441,7 @@ void P_SpawnScrollers(void)
 			{
 				// if 1, then displacement
 				// if 2, then accelerative (also if 3)
-				control = int(l->sidedef[0]->sector - sectors);
+				control = l->sidedef[0]->sector->Index();
 				if (l->args[1] & 2)
 					accel = 1;
 			}
@@ -476,7 +478,7 @@ void P_SpawnScrollers(void)
 
 				if (line->args[0] == l->args[0] && (line->args[1] & 1))
 				{
-					new DScroller(EScroll::sc_ceiling, -dx, dy, control, int(line->frontsector - sectors), accel);
+					new DScroller(EScroll::sc_ceiling, -dx, dy, control, line->frontsector->Index(), accel);
 				}
 			}
 			break;
@@ -496,7 +498,7 @@ void P_SpawnScrollers(void)
 
 					if (line->args[0] == l->args[0] && (line->args[1] & 2))
 					{
-						new DScroller (EScroll::sc_floor, -dx, dy, control, int(line->frontsector-sectors), accel);
+						new DScroller(EScroll::sc_floor, -dx, dy, control, line->frontsector->Index(), accel);
 					}
 				}
 			}
@@ -514,7 +516,7 @@ void P_SpawnScrollers(void)
 
 					if (line->args[0] == l->args[0] && (line->args[1] & 4))
 					{
-						new DScroller (EScroll::sc_carry, dx, dy, control, int(line->frontsector-sectors), accel);
+						new DScroller (EScroll::sc_carry, dx, dy, control, line->frontsector->Index(), accel);
 					}
 				}
 			}

src/p_sectors.cpp

@@ -1307,6 +1307,84 @@ int side_t::GetLightLevel (bool foggy, int baselight, bool is3dlight, int *pfake
 	return baselight;
 }
 
+DEFINE_ACTION_FUNCTION(_Secplane, isSlope)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	ACTION_RETURN_BOOL(!self->normal.XY().isZero());
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, PointOnSide)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	PARAM_FLOAT(z);
+	ACTION_RETURN_INT(self->PointOnSide(DVector3(x, y, z)));
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, ZatPoint)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	ACTION_RETURN_FLOAT(self->ZatPoint(x, y));
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, ZatPointDist)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	PARAM_FLOAT(d);
+	ACTION_RETURN_FLOAT((d + self->normal.X*x + self->normal.Y*y) * self->negiC);
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, isEqual)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_POINTER(other, secplane_t);
+	ACTION_RETURN_BOOL(*self == *other);
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, ChangeHeight)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(hdiff);
+	self->ChangeHeight(hdiff);
+	return 0;
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, GetChangedHeight)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(hdiff);
+	ACTION_RETURN_FLOAT(self->GetChangedHeight(hdiff));
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, HeightDiff)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(oldd);
+	if (numparam == 2)
+	{
+		ACTION_RETURN_FLOAT(self->HeightDiff(oldd));
+	}
+	else
+	{
+		PARAM_FLOAT(newd);
+		ACTION_RETURN_FLOAT(self->HeightDiff(oldd, newd));
+	}
+}
+
+DEFINE_ACTION_FUNCTION(_Secplane, PointToDist)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(secplane_t);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
+	PARAM_FLOAT(z);
+	ACTION_RETURN_FLOAT(self->PointToDist(DVector2(x, y), z));
+}
+
 
 DEFINE_FIELD_X(Sector, sector_t, floorplane)
 DEFINE_FIELD_X(Sector, sector_t, ceilingplane)
@@ -1366,3 +1444,7 @@ DEFINE_FIELD_X(Line, line_t, backsector)
 DEFINE_FIELD_X(Line, line_t, validcount)
 DEFINE_FIELD_X(Line, line_t, locknumber)
 DEFINE_FIELD_X(Line, line_t, portalindex)
+
+DEFINE_FIELD_X(Secplane, secplane_t, normal)
+DEFINE_FIELD_X(Secplane, secplane_t, D)
+DEFINE_FIELD_X(Secplane, secplane_t, negiC)

src/p_setup.cpp

@@ -122,8 +122,8 @@ int 			numsegs;
 seg_t*			segs;
 glsegextra_t*	glsegextras;
 
-int 			numsectors;
+//int 			numsectors;
-sector_t*		sectors;
+//sector_t*		sectors;
 TArray<sector_t>	loadsectors;
 
 int 			numsubsectors;
@@ -808,11 +808,11 @@ void P_FloodZones ()
 	int z = 0, i;
 	ReverbContainer *reverb;
 
-	for (i = 0; i < numsectors; ++i)
+	for (auto &sec : level.sectors)
 	{
-		if (sectors[i].ZoneNumber == 0xFFFF)
+		if (sec.ZoneNumber == 0xFFFF)
 		{
-			P_FloodZone (&sectors[i], z++);
+			P_FloodZone (&sec, z++);
 		}
 	}
 	Zones.Resize(z);
@@ -1463,7 +1463,6 @@ void P_LoadSubsectors (MapData * map)
 
 void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 {
-	int 				i;
 	char				*msp;
 	mapsector_t			*ms;
 	sector_t*			ss;
@@ -1471,8 +1470,9 @@ void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 	FDynamicColormap	*fogMap, *normMap;
 	int					lumplen = map->Size(ML_SECTORS);
 
-	numsectors = lumplen / sizeof(mapsector_t);
+	unsigned numsectors = lumplen / sizeof(mapsector_t);
-	sectors = new sector_t[numsectors];		
+	level.sectors.Alloc(numsectors);
+	auto sectors = &level.sectors[0];
 	memset (sectors, 0, numsectors*sizeof(sector_t));
 
 	if (level.flags & LEVEL_SNDSEQTOTALCTRL)
@@ -1490,7 +1490,7 @@ void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 	// Extended properties
 	sectors[0].e = new extsector_t[numsectors];
 
-	for (i = 0; i < numsectors; i++, ss++, ms++)
+	for (unsigned i = 0; i < numsectors; i++, ss++, ms++)
 	{
 		ss->e = &sectors[0].e[i];
 		if (!map->HasBehavior) ss->Flags |= SECF_FLOORDROP;
@@ -2529,22 +2529,21 @@ void P_ProcessSideTextures(bool checktranmap, side_t *sd, sector_t *sec, intmaps
 
 			if (colorgood | foggood)
 			{
-				int s;
 				FDynamicColormap *colormap = NULL;
 
-				for (s = 0; s < numsectors; s++)
+				for (unsigned s = 0; s < level.sectors.Size(); s++)
 				{
 					if (tagManager.SectorHasTag(s, tag))
 					{
-						if (!colorgood) color = sectors[s].ColorMap->Color;
+						if (!colorgood) color = level.sectors[s].ColorMap->Color;
-						if (!foggood) fog = sectors[s].ColorMap->Fade;
+						if (!foggood) fog = level.sectors[s].ColorMap->Fade;
 						if (colormap == NULL ||
 							colormap->Color != color ||
 							colormap->Fade != fog)
 						{
 							colormap = GetSpecialLights (color, fog, 0);
 						}
-						sectors[s].ColorMap = colormap;
+						level.sectors[s].ColorMap = colormap;
 					}
 				}
 			}
@@ -2638,14 +2637,14 @@ void P_LoadSideDefs2 (MapData *map, FMissingTextureTracker &missingtex)
 		// killough 4/11/98: refined to allow colormaps to work as wall
 		// textures if invalid as colormaps but valid as textures.
 
-		if ((unsigned)LittleShort(msd->sector)>=(unsigned)numsectors)
+		if ((unsigned)LittleShort(msd->sector)>=level.sectors.Size())
 		{
 			Printf (PRINT_HIGH, "Sidedef %d has a bad sector\n", i);
 			sd->sector = sec = NULL;
 		}
 		else
 		{
-			sd->sector = sec = &sectors[LittleShort(msd->sector)];
+			sd->sector = sec = &level.sectors[LittleShort(msd->sector)];
 		}
 
 		intmapsidedef_t imsd;
@@ -3089,28 +3088,26 @@ static void P_GroupLines (bool buildmap)
 {
 	cycle_t times[16];
 	unsigned int*		linesDoneInEachSector;
-	int 				i;
 	int 				total;
-	line_t* 			li;
 	sector_t*			sector;
 	FBoundingBox		bbox;
 	bool				flaggedNoFronts = false;
 	unsigned int		jj;
 
-	for (i = 0; i < (int)countof(times); ++i)
+	for (unsigned i = 0; i < countof(times); ++i)
 	{
 		times[i].Reset();
 	}
 
 	// look up sector number for each subsector
 	times[0].Clock();
-	for (i = 0; i < numsubsectors; i++)
+	for (int i = 0; i < numsubsectors; i++)
 	{
 		subsectors[i].sector = subsectors[i].firstline->sidedef->sector;
 	}
 	if (glsegextras != NULL)
 	{
-		for (i = 0; i < numsubsectors; i++)
+		for (int i = 0; i < numsubsectors; i++)
 		{
 			for (jj = 0; jj < subsectors[i].numlines; ++jj)
 			{
@@ -3123,8 +3120,9 @@ static void P_GroupLines (bool buildmap)
 	// count number of lines in each sector
 	times[1].Clock();
 	total = 0;
-	for (i = 0, li = lines; i < numlines; i++, li++)
+	for (int i = 0; i < numlines; i++)
 	{
+		auto li = &lines[i];
 		if (li->frontsector == NULL)
 		{
 			if (!flaggedNoFronts)
@@ -3156,10 +3154,12 @@ static void P_GroupLines (bool buildmap)
 	times[3].Clock();
 	linebuffer = new line_t *[total];
 	line_t **lineb_p = linebuffer;
+	auto numsectors = level.sectors.Size();
 	linesDoneInEachSector = new unsigned int[numsectors];
 	memset (linesDoneInEachSector, 0, sizeof(int)*numsectors);
 
-	for (sector = sectors, i = 0; i < numsectors; i++, sector++)
+	sector = &level.sectors[0];
+	for (unsigned i = 0; i < numsectors; i++, sector++)
 	{
 		if (sector->Lines.Count == 0)
 		{
@@ -3174,19 +3174,21 @@ static void P_GroupLines (bool buildmap)
 		}
 	}
 
-	for (i = numlines, li = lines; i > 0; --i, ++li)
+	for (int i = 0; i < numlines; i++)
 	{
+		auto li = &lines[i];
 		if (li->frontsector != NULL)
 		{
-			li->frontsector->Lines[linesDoneInEachSector[li->frontsector - sectors]++] = li;
+			li->frontsector->Lines[linesDoneInEachSector[li->frontsector->Index()]++] = li;
 		}
 		if (li->backsector != NULL && li->backsector != li->frontsector)
 		{
-			li->backsector->Lines[linesDoneInEachSector[li->backsector - sectors]++] = li;
+			li->backsector->Lines[linesDoneInEachSector[li->backsector->Index()]++] = li;
 		}
 	}
 	
-	for (i = 0, sector = sectors; i < numsectors; ++i, ++sector)
+	sector = &level.sectors[0];
+	for (unsigned i = 0; i < numsectors; ++i, ++sector)
 	{
 		if (linesDoneInEachSector[i] != sector->Lines.Size())
 		{
@@ -3235,7 +3237,7 @@ static void P_GroupLines (bool buildmap)
 	if (showloadtimes)
 	{
 		Printf ("---Group Lines Times---\n");
-		for (i = 0; i < 7; ++i)
+		for (int i = 0; i < 7; ++i)
 		{
 			Printf (" time %d:%9.4f ms\n", i, times[i].TimeMS());
 		}
@@ -3247,7 +3249,7 @@ static void P_GroupLines (bool buildmap)
 //
 void P_LoadReject (MapData * map, bool junk)
 {
-	const int neededsize = (numsectors * numsectors + 7) >> 3;
+	const int neededsize = (level.sectors.Size() * level.sectors.Size() + 7) >> 3;
 	int rejectsize;
 
 	if (strnicmp (map->MapLumps[ML_REJECT].Name, "REJECT", 8) != 0)
@@ -3385,10 +3387,10 @@ static void P_PrecacheLevel()
 		if (cls != NULL) actorhitlist[cls] = true;
 	}
 
-	for (i = numsectors - 1; i >= 0; i--)
+	for (i = level.sectors.Size() - 1; i >= 0; i--)
 	{
-		hitlist[sectors[i].GetTexture(sector_t::floor).GetIndex()] |= FTextureManager::HIT_Flat;
+		hitlist[level.sectors[i].GetTexture(sector_t::floor).GetIndex()] |= FTextureManager::HIT_Flat;
-		hitlist[sectors[i].GetTexture(sector_t::ceiling).GetIndex()] |= FTextureManager::HIT_Flat;
+		hitlist[level.sectors[i].GetTexture(sector_t::ceiling).GetIndex()] |= FTextureManager::HIT_Flat;
 	}
 
 	for (i = numsides - 1; i >= 0; i--)
@@ -3458,13 +3460,12 @@ void P_FreeLevelData ()
 		delete[] glsegextras;
 		glsegextras = NULL;
 	}
-	if (sectors != NULL)
+	if (level.sectors.Size() > 0)
 	{
-		delete[] sectors[0].e;
+		delete[] level.sectors[0].e;
-		delete[] sectors;
-		sectors = NULL;
 	}
-	numsectors = 0;
+	level.sectors.Clear();
+
 	if (gamenodes != NULL && gamenodes != nodes)
 	{
 		delete[] gamenodes;
@@ -4069,10 +4070,10 @@ void P_SetupLevel (const char *lumpname, int position)
 	P_SpawnSpecials ();
 
 	// disable reflective planes on sloped sectors.
-	for (auto i = 0; i < numsectors; i++)
+	for (auto &sec : level.sectors)
 	{
-		if (sectors[i].floorplane.isSlope()) sectors[i].reflect[sector_t::floor] = 0;
+		if (sec.floorplane.isSlope()) sec.reflect[sector_t::floor] = 0;
-		if (sectors[i].ceilingplane.isSlope()) sectors[i].reflect[sector_t::ceiling] = 0;
+		if (sec.ceilingplane.isSlope()) sec.reflect[sector_t::ceiling] = 0;
 	}
 
 	// This must be done BEFORE the PolyObj Spawn!!!
@@ -4192,8 +4193,8 @@ void P_SetupLevel (const char *lumpname, int position)
 	MapThingsUserDataIndex.Clear();
 	MapThingsUserData.Clear();
 
-	loadsectors.Resize(numsectors);
+	loadsectors.Resize(level.sectors.Size());
-	memcpy(&loadsectors[0], sectors, numsectors * sizeof(sector_t));
+	memcpy(&loadsectors[0], &level.sectors[0], loadsectors.Size() * sizeof(sector_t));
 	loadlines.Resize(numlines);
 	memcpy(&loadlines[0], lines, numlines * sizeof(line_t));
 	loadsides.Resize(numsides);

src/p_sight.cpp

@@ -821,7 +821,7 @@ bool P_CheckSight (AActor *t1, AActor *t2, int flags)
 
 	const sector_t *s1 = t1->Sector;
 	const sector_t *s2 = t2->Sector;
-	int pnum = int(s1 - sectors) * numsectors + int(s2 - sectors);
+	int pnum = int(s1->Index()) * level.sectors.Size() + int(s2->Index());
 
 //
 // check for trivial rejection

src/p_slopes.cpp

@@ -125,7 +125,7 @@ static void P_CopyPlane (int tag, sector_t *dest, bool copyCeil)
 		return;
 	}
 
-	source = &sectors[secnum];
+	source = &level.sectors[secnum];
 
 	if (copyCeil)
 	{
@@ -301,19 +301,18 @@ static void P_SetSlopesFromVertexHeights(FMapThing *firstmt, FMapThing *lastmt,
 
 	if (vt_found)
 	{
-		for (int i = 0; i < numsectors; i++)
+		for (auto &sec : level.sectors)
 		{
-			sector_t *sec = &sectors[i];
+			if (sec.Lines.Size() != 3) continue;	// only works with triangular sectors
-			if (sec->Lines.Size() != 3) continue;	// only works with triangular sectors
 
 			DVector3 vt1, vt2, vt3, cross;
 			DVector3 vec1, vec2;
 			int vi1, vi2, vi3;
 
-			vi1 = int(sec->Lines[0]->v1 - vertexes);
+			vi1 = int(sec.Lines[0]->v1 - vertexes);
-			vi2 = int(sec->Lines[0]->v2 - vertexes);
+			vi2 = int(sec.Lines[0]->v2 - vertexes);
-			vi3 = (sec->Lines[1]->v1 == sec->Lines[0]->v1 || sec->Lines[1]->v1 == sec->Lines[0]->v2)?
+			vi3 = (sec.Lines[1]->v1 == sec.Lines[0]->v1 || sec.Lines[1]->v1 == sec.Lines[0]->v2)?
-				int(sec->Lines[1]->v2 - vertexes) : int(sec->Lines[1]->v1 - vertexes);
+				int(sec.Lines[1]->v2 - vertexes) : int(sec.Lines[1]->v1 - vertexes);
 
 			vt1 = DVector3(vertexes[vi1].fPos(), 0);
 			vt2 = DVector3(vertexes[vi2].fPos(), 0);
@@ -326,11 +325,11 @@ static void P_SetSlopesFromVertexHeights(FMapThing *firstmt, FMapThing *lastmt,
 				double *h3 = vt_heights[j].CheckKey(vi3);
 				if (h1 == NULL && h2 == NULL && h3 == NULL) continue;
 
-				vt1.Z = h1? *h1 : j==0? sec->GetPlaneTexZ(sector_t::floor) : sec->GetPlaneTexZ(sector_t::ceiling);
+				vt1.Z = h1? *h1 : j==0? sec.GetPlaneTexZ(sector_t::floor) : sec.GetPlaneTexZ(sector_t::ceiling);
-				vt2.Z = h2? *h2 : j==0? sec->GetPlaneTexZ(sector_t::floor) : sec->GetPlaneTexZ(sector_t::ceiling);
+				vt2.Z = h2? *h2 : j==0? sec.GetPlaneTexZ(sector_t::floor) : sec.GetPlaneTexZ(sector_t::ceiling);
-				vt3.Z = h3? *h3 : j==0? sec->GetPlaneTexZ(sector_t::floor) : sec->GetPlaneTexZ(sector_t::ceiling);
+				vt3.Z = h3? *h3 : j==0? sec.GetPlaneTexZ(sector_t::floor) : sec.GetPlaneTexZ(sector_t::ceiling);
 
-				if (P_PointOnLineSidePrecise(vertexes[vi3].fX(), vertexes[vi3].fY(), sec->Lines[0]) == 0)
+				if (P_PointOnLineSidePrecise(vertexes[vi3].fX(), vertexes[vi3].fY(), sec.Lines[0]) == 0)
 				{
 					vec1 = vt2 - vt3;
 					vec2 = vt1 - vt3;
@@ -358,7 +357,7 @@ static void P_SetSlopesFromVertexHeights(FMapThing *firstmt, FMapThing *lastmt,
 					cross = -cross;
 				}
 
-				secplane_t *plane = j==0? &sec->floorplane : &sec->ceilingplane;
+				secplane_t *plane = j==0? &sec.floorplane : &sec.ceilingplane;
 
 				double dist = -cross[0] * vertexes[vi3].fX() - cross[1] * vertexes[vi3].fY() - cross[2] * vt3.Z;
 				plane->set(cross[0], cross[1], cross[2], dist);

src/p_spec.cpp

@@ -37,6 +37,7 @@
 #include "doomdef.h"
 #include "doomstat.h"
 #include "d_event.h"
+#include "g_level.h"
 #include "gstrings.h"
 
 #include "i_system.h"
@@ -432,7 +433,7 @@ void P_PlayerInSpecialSector (player_t *player, sector_t * sector)
 	if (sector->isSecret())
 	{
 		sector->ClearSecret();
-		P_GiveSecret(player->mo, true, true, int(sector - sectors));
+		P_GiveSecret(player->mo, true, true, sector->Index());
 	}
 }
 
@@ -472,7 +473,7 @@ void P_SectorDamage(int tag, int amount, FName type, PClassActor *protectClass,
 	while ((secnum = itr.Next()) >= 0)
 	{
 		AActor *actor, *next;
-		sector_t *sec = &sectors[secnum];
+		sector_t *sec = &level.sectors[secnum];
 
 		// Do for actors in this sector.
 		for (actor = sec->thinglist; actor != NULL; actor = next)
@@ -629,13 +630,10 @@ CUSTOM_CVAR (Bool, forcewater, false, CVAR_ARCHIVE|CVAR_SERVERINFO)
 {
 	if (gamestate == GS_LEVEL)
 	{
-		int i;
+		for (auto &sec : level.sectors)
-
-		for (i = 0; i < numsectors; i++)
 		{
-			sector_t *hsec = sectors[i].GetHeightSec();
+			sector_t *hsec = sec.GetHeightSec();
-			if (hsec &&
+			if (hsec && !(hsec->MoreFlags & SECF_UNDERWATER))
-				!(sectors[i].heightsec->MoreFlags & SECF_UNDERWATER))
 			{
 				if (self)
 				{
@@ -693,13 +691,13 @@ DLightTransfer::DLightTransfer (sector_t *srcSec, int target, bool copyFloor)
 	{
 		FSectorTagIterator itr(target);
 		while ((secnum = itr.Next()) >= 0)
-			sectors[secnum].ChangeFlags(sector_t::floor, 0, PLANEF_ABSLIGHTING);
+			level.sectors[secnum].ChangeFlags(sector_t::floor, 0, PLANEF_ABSLIGHTING);
 	}
 	else
 	{
 		FSectorTagIterator itr(target);
 		while ((secnum = itr.Next()) >= 0)
-			sectors[secnum].ChangeFlags(sector_t::ceiling, 0, PLANEF_ABSLIGHTING);
+			level.sectors[secnum].ChangeFlags(sector_t::ceiling, 0, PLANEF_ABSLIGHTING);
 	}
 	ChangeStatNum (STAT_LIGHTTRANSFER);
 }
@@ -715,7 +713,7 @@ void DLightTransfer::Tick ()
 	}
 }
 
-void DLightTransfer::DoTransfer (int level, int target, bool floor)
+void DLightTransfer::DoTransfer (int llevel, int target, bool floor)
 {
 	int secnum;
 
@@ -723,13 +721,13 @@ void DLightTransfer::DoTransfer (int level, int target, bool floor)
 	{
 		FSectorTagIterator itr(target);
 		while ((secnum = itr.Next()) >= 0)
-			sectors[secnum].SetPlaneLight(sector_t::floor, level);
+			level.sectors[secnum].SetPlaneLight(sector_t::floor, llevel);
 	}
 	else
 	{
 		FSectorTagIterator itr(target);
 		while ((secnum = itr.Next()) >= 0)
-			sectors[secnum].SetPlaneLight(sector_t::ceiling, level);
+			level.sectors[secnum].SetPlaneLight(sector_t::ceiling, llevel);
 	}
 }
 
@@ -957,7 +955,7 @@ static void CopyPortal(int sectortag, int plane, unsigned pnum, double alpha, bo
 	FSectorTagIterator itr(sectortag);
 	while ((s = itr.Next()) >= 0)
 	{
-		SetPortal(&sectors[s], plane, pnum, alpha);
+		SetPortal(&level.sectors[s], plane, pnum, alpha);
 	}
 
 	for (int j=0;j<numlines;j++)
@@ -978,7 +976,7 @@ static void CopyPortal(int sectortag, int plane, unsigned pnum, double alpha, bo
 				FSectorTagIterator itr(lines[j].args[0]);
 				while ((s = itr.Next()) >= 0)
 				{
-					SetPortal(&sectors[s], plane, pnum, alpha);
+					SetPortal(&level.sectors[s], plane, pnum, alpha);
 				}
 			}
 		}
@@ -1159,7 +1157,7 @@ void P_InitSectorSpecial(sector_t *sector, int special)
 
 	case dScroll_EastLavaDamage:
 		P_SetupSectorDamage(sector, 5, 32, 256, NAME_Fire, SECF_DMGTERRAINFX);
-		P_CreateScroller(EScroll::sc_floor, -4., 0, -1, int(sector - sectors), 0);
+		P_CreateScroller(EScroll::sc_floor, -4., 0, -1, sector->Index(), 0);
 		keepspecial = true;
 		break;
 
@@ -1217,14 +1215,14 @@ void P_InitSectorSpecial(sector_t *sector, int special)
 			int i = sector->special - Scroll_North_Slow;
 			double dx = hexenScrollies[i][0] / 2.;
 			double dy = hexenScrollies[i][1] / 2.;
-			P_CreateScroller(EScroll::sc_floor, dx, dy, -1, int(sector-sectors), 0);
+			P_CreateScroller(EScroll::sc_floor, dx, dy, -1, sector->Index(), 0);
 		}
 		else if (sector->special >= Carry_East5 &&
 					sector->special <= Carry_East35)
 		{ // Heretic scroll special
 			// Only east scrollers also scroll the texture
 			P_CreateScroller(EScroll::sc_floor,
-				-0.5 * (1 << ((sector->special & 0xff) - Carry_East5)),	0, -1, int(sector-sectors), 0);
+				-0.5 * (1 << ((sector->special & 0xff) - Carry_East5)),	0, -1, sector->Index(), 0);
 		}
 		keepspecial = true;
 		break;
@@ -1240,20 +1238,14 @@ void P_InitSectorSpecial(sector_t *sector, int special)
 
 void P_SpawnSpecials (void)
 {
-	sector_t *sector;
-	int i;
-
 	P_SetupPortals();
 
-	//	Init special SECTORs.
+	for (auto &sec : level.sectors)
-	sector = sectors;
-
-	for (i = 0; i < numsectors; i++, sector++)
 	{
-		if (sector->special == 0)
+		if (sec.special == 0)
 			continue;
 
-		P_InitSectorSpecial(sector, sector->special);
+		P_InitSectorSpecial(&sec, sec.special);
 	}
 
 #ifndef NO_EDATA
@@ -1274,7 +1266,7 @@ void P_SpawnSpecials (void)
 		P_SpawnSkybox(pt2);
 	}
 
-	for (i = 0; i < numlines; i++)
+	for (int i = 0; i < numlines; i++)
 	{
 		switch (lines[i].special)
 		{
@@ -1313,9 +1305,9 @@ void P_SpawnSpecials (void)
 				FSectorTagIterator itr(lines[i].args[0]);
 				while ((s = itr.Next()) >= 0)
 				{
-					sectors[s].heightsec = sec;
+					level.sectors[s].heightsec = sec;
-					sec->e->FakeFloor.Sectors.Push(&sectors[s]);
+					sec->e->FakeFloor.Sectors.Push(&level.sectors[s]);
-					sectors[s].AdjustFloorClip();
+					level.sectors[s].AdjustFloorClip();
 				}
 				break;
 			}
@@ -1388,7 +1380,7 @@ void P_SpawnSpecials (void)
 					double grav = lines[i].Delta().Length() / 100.;
 					FSectorTagIterator itr(lines[i].args[0]);
 					while ((s = itr.Next()) >= 0)
-						sectors[s].gravity = grav;
+						level.sectors[s].gravity = grav;
 				}
 				break;
 
@@ -1401,7 +1393,7 @@ void P_SpawnSpecials (void)
 					FSectorTagIterator itr(lines[i].args[0]);
 					while ((s = itr.Next()) >= 0)
 					{
-						sector_t *sec = &sectors[s];
+						sector_t *sec = &level.sectors[s];
 						sec->damageamount = damage;
 						sec->damagetype = NAME_None;
 						if (sec->damageamount < 20)
@@ -1441,7 +1433,7 @@ void P_SpawnSpecials (void)
 				{
 					FSectorTagIterator itr(lines[i].args[0]);
 					while ((s = itr.Next()) >= 0)
-						 sectors[s].sky = (i + 1) | PL_SKYFLAT; 
+						level.sectors[s].sky = (i + 1) | PL_SKYFLAT;
 					break;
 				}
 			}
@@ -1561,19 +1553,19 @@ void P_SetSectorFriction (int tag, int amount, bool alterFlag)
 		// drag on CPU. New code adjusts friction of sector only once
 		// at level startup, and then uses this friction value.
 
-		sectors[s].friction = friction;
+		level.sectors[s].friction = friction;
-		sectors[s].movefactor = movefactor;
+		level.sectors[s].movefactor = movefactor;
 		if (alterFlag)
 		{
 			// When used inside a script, the sectors' friction flags
 			// can be enabled and disabled at will.
 			if (friction == ORIG_FRICTION)
 			{
-				sectors[s].Flags &= ~SECF_FRICTION;
+				level.sectors[s].Flags &= ~SECF_FRICTION;
 			}
 			else
 			{
-				sectors[s].Flags |= SECF_FRICTION;
+				level.sectors[s].Flags |= SECF_FRICTION;
 			}
 		}
 	}

src/p_tags.cpp

@@ -45,11 +45,6 @@ FTagManager tagManager;
 //
 //-----------------------------------------------------------------------------
 
-static inline int sectindex(const sector_t *sector)
-{
-	return (int)(intptr_t)(sector - sectors);
-}
-
 static inline int lineindex(const line_t *line)
 {
 	return (int)(intptr_t)(line - lines);
@@ -194,7 +189,7 @@ void FTagManager::HashTags()
 
 bool FTagManager::SectorHasTags(const sector_t *sector) const
 {
-	int i = sectindex(sector);
+	int i = sector->Index();
 	return SectorHasTags(i);
 }
 
@@ -206,7 +201,7 @@ bool FTagManager::SectorHasTags(const sector_t *sector) const
 
 int FTagManager::GetFirstSectorTag(const sector_t *sect) const
 {
-	int i = sectindex(sect);
+	int i = sect->Index();
 	return SectorHasTags(i) ? allTags[startForSector[i]].tag : 0;
 }
 
@@ -238,7 +233,7 @@ bool FTagManager::SectorHasTag(int i, int tag) const
 
 bool FTagManager::SectorHasTag(const sector_t *sector, int tag) const
 {
-	return SectorHasTag(sectindex(sector), tag);
+	return SectorHasTag(sector->Index(), tag);
 }
 
 //-----------------------------------------------------------------------------
@@ -334,11 +329,11 @@ int FSectorTagIterator::Next()
 	else
 	{
 		// with the tag manager, searching for tag 0 has to be different, because it won't create entries for untagged sectors.
-		while (start < numsectors && tagManager.SectorHasTags(start))
+		while (start < (int)level.sectors.Size() && tagManager.SectorHasTags(start))
 		{
 			start++;
 		}
-		if (start == numsectors) return -1;
+		if (start == (int)level.sectors.Size()) return -1;
 		ret = start;
 		start++;
 	}
@@ -355,7 +350,7 @@ int FSectorTagIterator::NextCompat(bool compat, int start)
 {
 	if (!compat) return Next();
 
-	for (int i = start + 1; i < numsectors; i++)
+	for (unsigned i = start + 1; i < level.sectors.Size(); i++)
 	{
 		if (tagManager.SectorHasTag(i, searchtag)) return i;
 	}

src/p_tags.h

@@ -90,7 +90,7 @@ public:
 		if (tag == 0)
 		{
 			searchtag = INT_MIN;
-			start = (line == NULL || line->backsector == NULL)? -1 : (int)(line->backsector - sectors);
+			start = (line == NULL || line->backsector == NULL)? -1 : line->backsector->Index();
 		}
 		else
 		{

src/p_teleport.cpp

@@ -333,7 +333,7 @@ static AActor *SelectTeleDest (int tid, int tag, bool norandom)
 			TThinkerIterator<AActor> it2(NAME_TeleportDest);
 			while ((searcher = it2.Next()) != NULL)
 			{
-				if (searcher->Sector == sectors + secnum)
+				if (searcher->Sector == &level.sectors[secnum])
 				{
 					return searcher;
 				}
@@ -729,7 +729,7 @@ bool EV_TeleportSector (int tag, int source_tid, int dest_tid, bool fog, int gro
 	while ((secnum = itr.Next()) >= 0)
 	{
 		msecnode_t *node;
-		const sector_t * const sec = &sectors[secnum];
+		const sector_t * const sec = &level.sectors[secnum];
 
 		for (node = sec->touching_thinglist; node; )
 		{

src/p_trace.cpp

@@ -444,7 +444,7 @@ bool FTraceInfo::LineCheck(intercept_t *in, double dist, DVector3 hit)
 		// hit crossed a water plane
 		if (CheckSectorPlane(hsec, true))
 		{
-			Results->CrossedWater = &sectors[CurSector->sectornum];
+			Results->CrossedWater = &level.sectors[CurSector->sectornum];
 			Results->CrossedWaterPos = Results->HitPos;
 			Results->Distance = 0;
 		}
@@ -572,7 +572,7 @@ cont:
 	if (Results->HitType != TRACE_HitNone)
 	{
 		// We hit something, so figure out where exactly
-		Results->Sector = &sectors[CurSector->sectornum];
+		Results->Sector = &level.sectors[CurSector->sectornum];
 
 		if (Results->HitType != TRACE_HitWall &&
 			!CheckSectorPlane(CurSector, Results->HitType == TRACE_HitFloor))
@@ -698,7 +698,7 @@ bool FTraceInfo::ThingCheck(intercept_t *in, double dist, DVector3 hit)
 
 		// the trace hit a 3D floor before the thing.
 		// Calculate an intersection and abort.
-		Results->Sector = &sectors[CurSector->sectornum];
+		Results->Sector = &level.sectors[CurSector->sectornum];
 		if (!CheckSectorPlane(CurSector, Results->HitType == TRACE_HitFloor))
 		{
 			Results->HitType = TRACE_HitNone;
@@ -850,7 +850,7 @@ bool FTraceInfo::TraceTraverse (int ptflags)
 	}
 
 	// check for intersection with floor/ceiling
-	Results->Sector = &sectors[CurSector->sectornum];
+	Results->Sector = &level.sectors[CurSector->sectornum];
 
 	if (Results->CrossedWater == NULL &&
 		CurSector->heightsec != NULL &&
@@ -864,7 +864,7 @@ bool FTraceInfo::TraceTraverse (int ptflags)
 
 		if (CheckSectorPlane(CurSector->heightsec, true))
 		{
-			Results->CrossedWater = &sectors[CurSector->sectornum];
+			Results->CrossedWater = &level.sectors[CurSector->sectornum];
 			Results->CrossedWaterPos = Results->HitPos;
 			Results->Distance = 0;
 		}

src/p_udmf.cpp

@@ -1834,7 +1834,7 @@ public:
 					{
 						sides[side] = ParsedSides[mapside];
 						sides[side].linedef = &lines[line];
-						sides[side].sector = &sectors[intptr_t(sides[side].sector)];
+						sides[side].sector = &level.sectors[intptr_t(sides[side].sector)];
 						lines[line].sidedef[sd] = &sides[side];
 
 						P_ProcessSideTextures(!isExtended, &sides[side], sides[side].sector, &ParsedSideTextures[mapside],
@@ -2019,13 +2019,12 @@ public:
 		memcpy(vertexdatas, &ParsedVertexDatas[0], numvertexdatas * sizeof(*vertexdatas));
 
 		// Create the real sectors
-		numsectors = ParsedSectors.Size();
+		level.sectors.Alloc(ParsedSectors.Size());
-		sectors = new sector_t[numsectors];
+		memcpy(&level.sectors[0], &ParsedSectors[0], level.sectors.Size() * sizeof(sector_t));
-		memcpy(sectors, &ParsedSectors[0], numsectors * sizeof(*sectors));
+		level.sectors[0].e = new extsector_t[level.sectors.Size()];
-		sectors[0].e = new extsector_t[numsectors];
+		for(unsigned i = 0; i < level.sectors.Size(); i++)
-		for(int i = 0; i < numsectors; i++)
 		{
-			sectors[i].e = &sectors[0].e[i];
+			level.sectors[i].e = &level.sectors[0].e[i];
 		}
 
 		// Create the real linedefs and decompress the sidedefs

src/p_user.cpp

@@ -2061,7 +2061,7 @@ void P_MovePlayer (player_t *player)
 			msecnode_t *n = player->mo->touching_sectorlist;
 			while (n != NULL)
 			{
-				fprintf (debugfile, "%td ", n->m_sector-sectors);
+				fprintf (debugfile, "%d ", n->m_sector->sectornum);
 				n = n->m_tnext;
 			}
 			fprintf (debugfile, "]\n");

src/p_writemap.cpp

@@ -152,7 +152,7 @@ static int WriteSIDEDEFS (FILE *file)
 	{
 		msd.textureoffset = LittleShort(short(sides[i].GetTextureXOffset(side_t::mid)));
 		msd.rowoffset = LittleShort(short(sides[i].GetTextureYOffset(side_t::mid)));
-		msd.sector = LittleShort(short(sides[i].sector - sectors));
+		msd.sector = LittleShort(short(sides[i].sector - &level.sectors[0]));
 		uppercopy (msd.toptexture, GetTextureName (sides[i].GetTexture(side_t::top)));
 		uppercopy (msd.bottomtexture, GetTextureName (sides[i].GetTexture(side_t::bottom)));
 		uppercopy (msd.midtexture, GetTextureName (sides[i].GetTexture(side_t::mid)));
@@ -194,18 +194,18 @@ static int WriteSECTORS (FILE *file)
 {
 	mapsector_t ms;
 
-	for (int i = 0; i < numsectors; ++i)
+	for (unsigned i = 0; i < level.sectors.Size(); ++i)
 	{
-		ms.floorheight = LittleShort(short(sectors[i].GetPlaneTexZ(sector_t::floor)));
+		ms.floorheight = LittleShort(short(level.sectors[i].GetPlaneTexZ(sector_t::floor)));
-		ms.ceilingheight = LittleShort(short(sectors[i].GetPlaneTexZ(sector_t::ceiling)));
+		ms.ceilingheight = LittleShort(short(level.sectors[i].GetPlaneTexZ(sector_t::ceiling)));
-		uppercopy (ms.floorpic, GetTextureName (sectors[i].GetTexture(sector_t::floor)));
+		uppercopy (ms.floorpic, GetTextureName (level.sectors[i].GetTexture(sector_t::floor)));
-		uppercopy (ms.ceilingpic, GetTextureName (sectors[i].GetTexture(sector_t::ceiling)));
+		uppercopy (ms.ceilingpic, GetTextureName (level.sectors[i].GetTexture(sector_t::ceiling)));
-		ms.lightlevel = LittleShort((short)sectors[i].lightlevel);
+		ms.lightlevel = LittleShort((short)level.sectors[i].lightlevel);
-		ms.special = LittleShort(sectors[i].special);
+		ms.special = LittleShort(level.sectors[i].special);
-		ms.tag = LittleShort(tagManager.GetFirstSectorTag(&sectors[i]));
+		ms.tag = LittleShort(tagManager.GetFirstSectorTag(&level.sectors[i]));
 		fwrite (&ms, sizeof(ms), 1, file);
 	}
-	return numsectors * sizeof(ms);
+	return level.sectors.Size() * sizeof(ms);
 }
 
 static int WriteREJECT (FILE *file)

src/portal.cpp

@@ -980,18 +980,18 @@ void P_CreateLinkedPortals()
 	id = 1;
 	if (orgs.Size() != 0)
 	{
-		for (int i = 0; i < numsectors; i++)
+		for (auto &sec : level.sectors)
 		{
 			for (int j = 0; j < 2; j++)
 			{
-				if (sectors[i].GetPortalType(j) == PORTS_LINKEDPORTAL)
+				if (sec.GetPortalType(j) == PORTS_LINKEDPORTAL)
 				{
-					secplane_t &plane = j == 0 ? sectors[i].floorplane : sectors[i].ceilingplane;
+					secplane_t &plane = j == 0 ? sec.floorplane : sec.ceilingplane;
 					if (plane.isSlope())
 					{
 						// The engine cannot deal with portals on a sloped plane.
-						sectors[i].ClearPortal(j);
+						sec.ClearPortal(j);
-						Printf("Portal on %s of sector %d is sloped and will be disabled\n", j == 0 ? "floor" : "ceiling", i);
+						Printf("Portal on %s of sector %d is sloped and will be disabled\n", j == 0 ? "floor" : "ceiling", sec.sectornum);
 					}
 				}
 			}
@@ -1015,14 +1015,14 @@ void P_CreateLinkedPortals()
 
 	Displacements.Create(id);
 	// Check for leftover sectors that connect to a portal
-	for (int i = 0; i<numsectors; i++)
+	for (auto &sec : level.sectors)
 	{
 		for (int j = 0; j < 2; j++)
 		{
-			if (sectors[i].GetPortalType(j) == PORTS_LINKEDPORTAL && sectors[i].PortalGroup == 0)
+			if (sec.GetPortalType(j) == PORTS_LINKEDPORTAL && sec.PortalGroup == 0)
 			{
-				auto p = sectors[i].GetPortal(j);
+				auto p = sec.GetPortal(j);
-				CollectSectors(p->mOrigin->PortalGroup, &sectors[i]);
+				CollectSectors(p->mOrigin->PortalGroup, &sec);
 			}
 		}
 	}
@@ -1048,10 +1048,10 @@ void P_CreateLinkedPortals()
 				(dispxy.pos.X != -dispyx.pos.X || dispxy.pos.Y != -dispyx.pos.Y))
 			{
 				int sec1 = -1, sec2 = -1;
-				for (int i = 0; i < numsectors && (sec1 == -1 || sec2 == -1); i++)
+				for (unsigned i = 0; i < level.sectors.Size() && (sec1 == -1 || sec2 == -1); i++)
 				{
-					if (sec1 == -1 && sectors[i].PortalGroup == x)  sec1 = i;
+					if (sec1 == -1 && level.sectors[i].PortalGroup == x)  sec1 = i;
-					if (sec2 == -1 && sectors[i].PortalGroup == y)  sec2 = i;
+					if (sec2 == -1 && level.sectors[i].PortalGroup == y)  sec2 = i;
 				}
 				Printf("Link offset mismatch between sectors %d and %d\n", sec1, sec2);
 				bogus = true;
@@ -1065,13 +1065,13 @@ void P_CreateLinkedPortals()
 				}
 			}
 			// and now print a message for everything that still wasn't processed.
-			for (int i = 0; i < numsectors; i++)
+			for (auto &sec : level.sectors)
 			{
-				if (sectors[i].PortalGroup == 0)
+				if (sec.PortalGroup == 0)
 				{
-					Printf("Unable to assign sector %d to any group. Possibly self-referencing\n", i);
+					Printf("Unable to assign sector %d to any group. Possibly self-referencing\n", sec.sectornum);
 				}
-				else if (sectors[i].PortalGroup == -1) sectors[i].PortalGroup = 0;
+				else if (sec.PortalGroup == -1) sec.PortalGroup = 0;
 			}
 		}
 	}
@@ -1088,41 +1088,41 @@ void P_CreateLinkedPortals()
 		rejectmatrix = NULL;
 	}
 	// finally we must flag all planes which are obstructed by the sector's own ceiling or floor.
-	for (int i = 0; i < numsectors; i++)
+	for (auto &sec : level.sectors)
 	{
-		sectors[i].CheckPortalPlane(sector_t::floor);
+		sec.CheckPortalPlane(sector_t::floor);
-		sectors[i].CheckPortalPlane(sector_t::ceiling);
+		sec.CheckPortalPlane(sector_t::ceiling);
 		// set a flag on each line connecting to a plane portal sector. This is used to reduce the amount of checks in P_CheckSight.
-		if (sectors[i].PortalIsLinked(sector_t::floor) || sectors[i].PortalIsLinked(sector_t::ceiling))
+		if (sec.PortalIsLinked(sector_t::floor) || sec.PortalIsLinked(sector_t::ceiling))
 		{
-			for(auto ln : sectors[i].Lines)
+			for(auto ln : sec.Lines)
 			{
 				ln->flags |= ML_PORTALCONNECT;
 			}
 		}
-		if (sectors[i].PortalIsLinked(sector_t::ceiling) && sectors[i].PortalIsLinked(sector_t::floor))
+		if (sec.PortalIsLinked(sector_t::ceiling) && sec.PortalIsLinked(sector_t::floor))
 		{
-			double cz = sectors[i].GetPortalPlaneZ(sector_t::ceiling);
+			double cz = sec.GetPortalPlaneZ(sector_t::ceiling);
-			double fz = sectors[i].GetPortalPlaneZ(sector_t::floor);
+			double fz = sec.GetPortalPlaneZ(sector_t::floor);
 			if (cz < fz)
 			{
 				// This is a fatal condition. We have to remove one of the two portals. Choose the one that doesn't match the current plane
-				Printf("Error in sector %d: Ceiling portal at z=%f is below floor portal at z=%f\n", i, cz, fz);
+				Printf("Error in sector %d: Ceiling portal at z=%f is below floor portal at z=%f\n", sec.sectornum, cz, fz);
-				double cp = -sectors[i].ceilingplane.fD();
+				double cp = -sec.ceilingplane.fD();
-				double fp = sectors[i].floorplane.fD();
+				double fp = sec.floorplane.fD();
 				if (cp < fp || fz == fp)
 				{
-					sectors[i].ClearPortal(sector_t::ceiling);
+					sec.ClearPortal(sector_t::ceiling);
 				}
 				else
 				{
-					sectors[i].ClearPortal(sector_t::floor);
+					sec.ClearPortal(sector_t::floor);
 				}
 			}
 		}
 		// mark all sector planes that check out ok for everything.
-		if (sectors[i].PortalIsLinked(sector_t::floor)) sectors[i].planes[sector_t::floor].Flags |= PLANEF_LINKED;
+		if (sec.PortalIsLinked(sector_t::floor)) sec.planes[sector_t::floor].Flags |= PLANEF_LINKED;
-		if (sectors[i].PortalIsLinked(sector_t::ceiling)) sectors[i].planes[sector_t::ceiling].Flags |= PLANEF_LINKED;
+		if (sec.PortalIsLinked(sector_t::ceiling)) sec.planes[sector_t::ceiling].Flags |= PLANEF_LINKED;
 	}
 	if (linkedPortals.Size() > 0)
 	{

src/r_defs.h

@@ -23,7 +23,6 @@
 #ifndef __R_DEFS_H__
 #define __R_DEFS_H__
 
-#include <forward_list>
 #include "doomdef.h"
 #include "templates.h"
 #include "memarena.h"
@@ -659,6 +658,7 @@ public:
 	double FindLowestCeilingPoint(vertex_t **v) const;
 	double FindHighestFloorPoint(vertex_t **v) const;
 	void RemoveForceField();
+	int Index() const { return int(this - &level.sectors[0]); }
 
 	void AdjustFloorClip () const;
 	void SetColor(int r, int g, int b, int desat);

src/r_state.h

@@ -50,9 +50,6 @@ extern vertexdata_t*		vertexdatas;
 extern int				numsegs;
 extern seg_t*			segs;
 
-extern int				numsectors;
-extern sector_t*		sectors;
-
 extern int				numsubsectors;
 extern subsector_t* 	subsectors;
 

src/scripting/thingdef_data.cpp

@@ -711,6 +711,26 @@ static int fieldcmp(const void * a, const void * b)
 void InitThingdef()
 {
 	// Create all global variables here because this cannot be done on the script side and really isn't worth adding support for.
+	// Also create all special fields here that cannot be declared by script syntax.
+
+	auto secplanestruct = NewNativeStruct("Secplane", nullptr);
+	secplanestruct->Size = sizeof(secplane_t);
+	secplanestruct->Align = alignof(secplane_t);
+	auto sectorstruct = NewNativeStruct("Sector", nullptr);
+	sectorstruct->Size = sizeof(sector_t);
+	sectorstruct->Align = alignof(sector_t);
+
+
+	// set up the lines array in the sector struct. This is a bit messy because the type system is not prepared to handle a pointer to an array of pointers to a native struct even remotely well...
+	// As a result, the size has to be set to something large and arbritrary because it can change between maps. This will need some serious improvement when things get cleaned up.
+	sectorstruct->AddNativeField("lines", NewPointer(NewResizableArray(NewPointer(NewNativeStruct("line", nullptr), false)), false), myoffsetof(sector_t, Lines), VARF_Native);
+
+	// add the sector planes. These are value items of native structs so they have to be done here.
+	sectorstruct->AddNativeField("ceilingplane", secplanestruct, myoffsetof(sector_t, ceilingplane), VARF_Native);
+	sectorstruct->AddNativeField("floorplane", secplanestruct, myoffsetof(sector_t, floorplane), VARF_Native);
+
+
+
 
 	// expose the global validcount variable.
 	PField *vcf = new PField("validcount", TypeSInt32, VARF_Native | VARF_Static, (intptr_t)&validcount);
@@ -725,10 +745,12 @@ void InitThingdef()
 	PField *levelf = new PField("level", lstruct, VARF_Native | VARF_Static, (intptr_t)&level);
 	GlobalSymbols.AddSymbol(levelf);
 
+	// Add the sector array to LevelLocals.
+	lstruct->AddNativeField("sectors", NewPointer(NewResizableArray(sectorstruct), false), myoffsetof(FLevelLocals, sectors), VARF_Native);
+
 	// set up a variable for the DEH data
 	PStruct *dstruct = NewNativeStruct("DehInfo", nullptr);
 	PField *dehf = new PField("deh", dstruct, VARF_Native | VARF_Static, (intptr_t)&deh);
-
 	GlobalSymbols.AddSymbol(dehf);
 
 	// set up a variable for the global players array.
@@ -739,11 +761,6 @@ void InitThingdef()
 	PField *playerf = new PField("players", parray, VARF_Native | VARF_Static, (intptr_t)&players);
 	GlobalSymbols.AddSymbol(playerf);
 
-	// set up the lines array in the sector struct. This is a bit messy because the type system is not prepared to handle a pointer to an array of pointers to a native struct even remotely well...
-	// As a result, the size has to be set to something large and arbritrary because it can change between maps. This will need some serious improvement when things get cleaned up.
-	pstruct = NewNativeStruct("Sector", nullptr);
-	pstruct->AddNativeField("lines", NewPointer(NewResizableArray(NewPointer(NewNativeStruct("line", nullptr), false)), false), myoffsetof(sector_t, Lines), VARF_Native);
-
 	parray = NewArray(TypeBool, MAXPLAYERS);
 	playerf = new PField("playeringame", parray, VARF_Native | VARF_Static | VARF_ReadOnly, (intptr_t)&playeringame);
 	GlobalSymbols.AddSymbol(playerf);

src/serializer.cpp

@@ -1463,12 +1463,12 @@ template<> FSerializer &Serialize(FSerializer &arc, const char *key, side_t *&va
 
 template<> FSerializer &Serialize(FSerializer &arc, const char *key, sector_t *&value, sector_t **defval)
 {
-	return SerializePointer(arc, key, value, defval, sectors);
+	return SerializePointer(arc, key, value, defval, &level.sectors[0]);
 }
 
 template<> FSerializer &Serialize(FSerializer &arc, const char *key, const sector_t *&value, const sector_t **defval)
 {
-	return SerializePointer<const sector_t>(arc, key, value, defval, sectors);
+	return SerializePointer<const sector_t>(arc, key, value, defval, &level.sectors[0]);
 }
 
 template<> FSerializer &Serialize(FSerializer &arc, const char *key, player_t *&value, player_t **defval)

src/tarray.h

@@ -563,10 +563,13 @@ public:
 	void Clear()
 	{
 		if (this->Array) delete[] this->Array;
+		this->Count = 0;
+		this->Array = NULL;
 	}
 	void Alloc(unsigned int amount)
 	{
-		Clear();
+		// intentionally first deletes and then reallocates.
+		if (this->Array) delete[] this->Array;
 		this->Array = new T[amount];
 		this->Count = amount;
 	}

wadsrc/static/zscript/base.txt

@@ -236,10 +236,27 @@ struct Line native
 	native readonly uint			portalindex;
 }
 
+struct SecPlane native
+{
+	native Vector3 Normal;
+	native double D;
+	native double negiC;
+	
+	native bool isSlope();
+	native int PointOnSide(Vector3 pos);
+	native double ZatPoint (Vector2 v);
+	native double ZatPointDist(Vector2 v, double dist);
+	native bool isEqual(Secplane other);
+	native void ChangeHeight(double hdiff);
+	native double GetChangedHeight(double hdiff);
+	native double HeightDiff(double oldd, double newd = 0.0);
+	native double PointToDist(const DVector2 &xy, double z);
+}
+
 struct Sector native
 {
-	//secplane_t	floorplane, ceilingplane;
+	//secplane_t	floorplane, ceilingplane;	// defined internally
-	//FDynamicColormap *ColorMap;	// [RH] Per-sector colormap
+	//FDynamicColormap *ColorMap;
 
 	native Actor 		SoundTarget;