Fixed: Light levels outside the range [0,255] really do matter.

SVN r3223 (trunk)

src/g_shared/a_lightning.cpp

@@ -21,7 +21,7 @@ DLightningThinker::DLightningThinker ()
 	LightningFlashCount = 0;
 	NextLightningFlash = ((pr_lightning()&15)+5)*35; // don't flash at level start
 
-	LightningLightLevels = new BYTE[numsectors + (numsectors+7)/8];
+	LightningLightLevels = new short[numsectors + (numsectors+7)/8];
 	memset (LightningLightLevels, 0, numsectors + (numsectors+7)/8);
 }
 
@@ -36,7 +36,7 @@ DLightningThinker::~DLightningThinker ()
 void DLightningThinker::Serialize (FArchive &arc)
 {
 	int i;
-	BYTE *lights;
+	short *lights;
 
 	Super::Serialize (arc);
 
@@ -48,12 +48,21 @@ void DLightningThinker::Serialize (FArchive &arc)
 		{
 			delete[] LightningLightLevels;
 		}
-		LightningLightLevels = new BYTE[numsectors + (numsectors+7)/8];
+		LightningLightLevels = new short[numsectors + (numsectors+7)/8];
 	}
 	lights = LightningLightLevels;
 	for (i = (numsectors + (numsectors+7)/8); i > 0; ++lights, --i)
 	{
-		arc << *lights;
+		if (SaveVersion < 3223)
+		{
+			BYTE bytelight;
+			arc << bytelight;
+			*lights = bytelight;
+		}
+		else
+		{
+			arc << *lights;
+		}
 	}
 }
 

src/g_shared/a_lightning.h

@@ -24,7 +24,7 @@ protected:
 	int NextLightningFlash;
 	int LightningFlashCount;
 	bool Stopped;
-	BYTE *LightningLightLevels;
+	short *LightningLightLevels;
 };
 
 void P_StartLightning ();

src/p_3dfloors.h

@@ -82,7 +82,7 @@ struct F3DFloor
 	planeref			bottom;
 	planeref			top;
 
-	unsigned char		*toplightlevel;
+	short				*toplightlevel;
 	
 	fixed_t				delta;
 	
@@ -110,7 +110,7 @@ struct F3DFloor
 struct lightlist_t
 {
 	secplane_t				plane;
-	unsigned char *			p_lightlevel;
+	short *					p_lightlevel;
 	FDynamicColormap *		extra_colormap;
 	PalEntry				blend;
 	int						flags;

src/p_lights.cpp

@@ -110,15 +110,15 @@ DFireFlicker::DFireFlicker (sector_t *sector)
 	: DLighting (sector)
 {
 	m_MaxLight = sector->lightlevel;
-	m_MinLight = MIN (sector->FindMinSurroundingLight (sector->lightlevel)+16, 255);
+	m_MinLight = sector_t::ClampLight(sector->FindMinSurroundingLight(sector->lightlevel) + 16);
 	m_Count = 4;
 }
 
 DFireFlicker::DFireFlicker (sector_t *sector, int upper, int lower)
 	: DLighting (sector)
 {
-	m_MaxLight = clamp (upper, 0, 255);
-	m_MinLight = clamp (lower, 0, 255);
+	m_MaxLight = sector_t::ClampLight(upper);
+	m_MinLight = sector_t::ClampLight(lower);
 	m_Count = 4;
 }
 
@@ -260,8 +260,8 @@ DLightFlash::DLightFlash (sector_t *sector, int min, int max)
 	: DLighting (sector)
 {
 	// Use specified light levels.
-	m_MaxLight = clamp (max, 0, 255);
-	m_MinLight = clamp (min, 0, 255);
+	m_MaxLight = sector_t::ClampLight(max);
+	m_MinLight = sector_t::ClampLight(min);
 	m_MaxTime = 64;
 	m_MinTime = 7;
 	m_Count = (pr_lightflash() & m_MaxTime) + 1;
@@ -320,8 +320,8 @@ DStrobe::DStrobe (sector_t *sector, int upper, int lower, int utics, int ltics)
 {
 	m_DarkTime = ltics;
 	m_BrightTime = utics;
-	m_MaxLight = clamp (upper, 0, 255);
-	m_MinLight = clamp (lower, 0, 255);
+	m_MaxLight = sector_t::ClampLight(upper);
+	m_MinLight = sector_t::ClampLight(lower);
 	m_Count = 1;	// Hexen-style is always in sync
 }
 
@@ -513,7 +513,7 @@ void EV_LightTurnOnPartway (int tag, fixed_t frac)
 //
 // [RH] New function to adjust tagged sectors' light levels
 //		by a relative amount. Light levels are clipped to
-//		within the range 0-255 inclusive.
+//		be within range for sector_t::lightlevel.
 //
 //-----------------------------------------------------------------------------
 
@@ -523,8 +523,7 @@ void EV_LightChange (int tag, int value)
 
 	while ((secnum = P_FindSectorFromTag (tag, secnum)) >= 0)
 	{
-		int newlight = sectors[secnum].lightlevel + value;
-		sectors[secnum].SetLightLevel(newlight);
+		sectors[secnum].SetLightLevel(sectors[secnum].lightlevel + value);
 	}
 }
 
@@ -651,8 +650,8 @@ void DGlow2::Tick ()
 DGlow2::DGlow2 (sector_t *sector, int start, int end, int tics, bool oneshot)
 	: DLighting (sector)
 {
-	m_Start = clamp (start, 0, 255);
-	m_End = clamp (end, 0, 255);
+	m_Start = sector_t::ClampLight(start);
+	m_End = sector_t::ClampLight(end);
 	m_MaxTics = tics;
 	m_Tics = -1;
 	m_OneShot = oneshot;

src/p_saveg.cpp

@@ -315,9 +315,18 @@ void P_SerializeWorld (FArchive &arc)
 	for (i = 0, sec = sectors; i < numsectors; i++, sec++)
 	{
 		arc << sec->floorplane
-			<< sec->ceilingplane
-			<< sec->lightlevel
-			<< sec->special
+			<< sec->ceilingplane;
+		if (SaveVersion < 3223)
+		{
+			BYTE bytelight;
+			arc << bytelight;
+			sec->lightlevel = bytelight;
+		}
+		else
+		{
+			arc << sec->lightlevel;
+		}
+		arc << sec->special
 			<< sec->tag
 			<< sec->soundtraversed
 			<< sec->seqType

src/p_setup.cpp

@@ -1483,7 +1483,7 @@ void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 		ss->ceilingplane.ic = -FRACUNIT;
 		SetTexture(ss, i, sector_t::floor, ms->floorpic, missingtex);
 		SetTexture(ss, i, sector_t::ceiling, ms->ceilingpic, missingtex);
-		ss->lightlevel = (BYTE)clamp (LittleShort(ms->lightlevel), (short)0, (short)255);
+		ss->lightlevel = LittleShort(ms->lightlevel);
 		if (map->HasBehavior)
 			ss->special = LittleShort(ms->special);
 		else	// [RH] Translate to new sector special

src/p_spec.cpp

@@ -695,12 +695,12 @@ public:
 	void Tick ();
 
 protected:
-	static void DoTransfer (BYTE level, int target, bool floor);
+	static void DoTransfer (int level, int target, bool floor);
 
-	BYTE LastLight;
 	sector_t *Source;
 	int TargetTag;
 	bool CopyFloor;
+	short LastLight;
 };
 
 IMPLEMENT_CLASS (DLightTransfer)
@@ -708,7 +708,17 @@ IMPLEMENT_CLASS (DLightTransfer)
 void DLightTransfer::Serialize (FArchive &arc)
 {
 	Super::Serialize (arc);
-	arc << LastLight << Source << TargetTag << CopyFloor;
+	if (SaveVersion < 3223)
+	{
+		BYTE bytelight;
+		arc << bytelight;
+		LastLight = bytelight;
+	}
+	else
+	{
+		arc << LastLight;
+	}
+	arc << Source << TargetTag << CopyFloor;
 }
 
 DLightTransfer::DLightTransfer (sector_t *srcSec, int target, bool copyFloor)
@@ -735,7 +745,7 @@ DLightTransfer::DLightTransfer (sector_t *srcSec, int target, bool copyFloor)
 
 void DLightTransfer::Tick ()
 {
-	BYTE light = Source->lightlevel;
+	int light = Source->lightlevel;
 
 	if (light != LastLight)
 	{
@@ -744,7 +754,7 @@ void DLightTransfer::Tick ()
 	}
 }
 
-void DLightTransfer::DoTransfer (BYTE level, int target, bool floor)
+void DLightTransfer::DoTransfer (int level, int target, bool floor)
 {
 	int secnum;
 
@@ -778,12 +788,12 @@ public:
 	void Tick ();
 
 protected:
-	static void DoTransfer (BYTE level, int target, BYTE flags);
+	static void DoTransfer (short level, int target, BYTE flags);
 
-	BYTE LastLight;
-	BYTE Flags;
 	sector_t *Source;
 	int TargetID;
+	short LastLight;
+	BYTE Flags;
 };
 
 IMPLEMENT_CLASS (DWallLightTransfer)
@@ -791,7 +801,17 @@ IMPLEMENT_CLASS (DWallLightTransfer)
 void DWallLightTransfer::Serialize (FArchive &arc)
 {
 	Super::Serialize (arc);
-	arc << LastLight << Source << TargetID << Flags;
+	if (SaveVersion < 3223)
+	{
+		BYTE bytelight;
+		arc << bytelight;
+		LastLight = bytelight;
+	}
+	else
+	{
+		arc << LastLight;
+	}
+	arc << Source << TargetID << Flags;
 }
 
 DWallLightTransfer::DWallLightTransfer (sector_t *srcSec, int target, BYTE flags)
@@ -802,10 +822,16 @@ DWallLightTransfer::DWallLightTransfer (sector_t *srcSec, int target, BYTE flags
 	Source = srcSec;
 	TargetID = target;
 	Flags = flags;
-	DoTransfer (LastLight = srcSec->lightlevel, target, Flags);
+	DoTransfer (LastLight = srcSec->GetLightLevel(), target, Flags);
 
-	if (!(flags&WLF_NOFAKECONTRAST)) wallflags = WALLF_ABSLIGHTING;
-	else wallflags = WALLF_NOFAKECONTRAST|WALLF_ABSLIGHTING;
+	if (!(flags & WLF_NOFAKECONTRAST))
+	{
+		wallflags = WALLF_ABSLIGHTING;
+	}
+	else
+	{
+		wallflags = WALLF_ABSLIGHTING | WALLF_NOFAKECONTRAST;
+	}
 
 	for (linenum = -1; (linenum = P_FindLineFromID (target, linenum)) >= 0; )
 	{
@@ -824,7 +850,7 @@ DWallLightTransfer::DWallLightTransfer (sector_t *srcSec, int target, BYTE flags
 
 void DWallLightTransfer::Tick ()
 {
-	BYTE light = Source->lightlevel;
+	short light = sector_t::ClampLight(Source->lightlevel);
 
 	if (light != LastLight)
 	{
@@ -833,13 +859,13 @@ void DWallLightTransfer::Tick ()
 	}
 }
 
-void DWallLightTransfer::DoTransfer (BYTE lightlevel, int target, BYTE flags)
+void DWallLightTransfer::DoTransfer (short lightlevel, int target, BYTE flags)
 {
 	int linenum;
 
 	for (linenum = -1; (linenum = P_FindLineFromID (target, linenum)) >= 0; )
 	{
-		line_t * line = &lines[linenum];
+		line_t *line = &lines[linenum];
 
 		if (flags & WLF_SIDE1 && line->sidedef[0] != NULL)
 		{

src/p_udmf.cpp

@@ -1122,7 +1122,7 @@ public:
 				continue;
 
 			case NAME_Lightlevel:
-				sec->lightlevel = (BYTE)clamp<int>(CheckInt(key), 0, 255);
+				sec->lightlevel = sector_t::ClampLight(CheckInt(key));
 				continue;
 
 			case NAME_Special:

src/r_bsp.cpp

@@ -320,7 +320,7 @@ int GetFloorLight (const sector_t *sec)
 	}
 	else
 	{
-		return clamp (sec->lightlevel + sec->GetPlaneLight(sector_t::floor), 0, 255);
+		return sector_t::ClampLight(sec->lightlevel + sec->GetPlaneLight(sector_t::floor));
 	}
 }
 
@@ -332,7 +332,7 @@ int GetCeilingLight (const sector_t *sec)
 	}
 	else
 	{
-		return clamp (sec->lightlevel + sec->GetPlaneLight(sector_t::ceiling), 0, 255);
+		return sector_t::ClampLight(sec->lightlevel + sec->GetPlaneLight(sector_t::ceiling));
 	}
 }
 

src/r_defs.h

@@ -611,14 +611,19 @@ struct sector_t
 			)? heightsec : NULL;
 	}
 
+	static inline short ClampLight(int level)
+	{
+		return (short)clamp(level, SHRT_MIN, SHRT_MAX);
+	}
+
 	void ChangeLightLevel(int newval)
 	{
-		lightlevel = (BYTE)clamp(lightlevel + newval, 0, 255);
+		lightlevel = ClampLight(lightlevel + newval);
 	}
 
 	void SetLightLevel(int newval)
 	{
-		lightlevel = (BYTE)clamp(newval, 0, 255);
+		lightlevel = ClampLight(newval);
 	}
 
 	int GetLightLevel() const
@@ -644,17 +649,17 @@ struct sector_t
 	// [RH] give floor and ceiling even more properties
 	FDynamicColormap *ColorMap;	// [RH] Per-sector colormap
 
-	BYTE		lightlevel;
 
 	TObjPtr<AActor> SoundTarget;
-	BYTE 		soundtraversed;	// 0 = untraversed, 1,2 = sndlines -1
 
 	short		special;
 	short		tag;
+	short		lightlevel;
+	short		seqType;		// this sector's sound sequence
+
 	int			nexttag,firsttag;	// killough 1/30/98: improves searches for tags.
 
 	int			sky;
-	short		seqType;		// this sector's sound sequence
 	FNameNoInit	SeqName;		// Sound sequence name. Setting seqType non-negative will override this.
 
 	fixed_t		soundorg[2];	// origin for any sounds played by the sector
@@ -680,6 +685,7 @@ struct sector_t
 	};
 	TObjPtr<DInterpolation> interpolations[4];
 
+	BYTE 		soundtraversed;	// 0 = untraversed, 1,2 = sndlines -1
 	// jff 2/26/98 lockout machinery for stairbuilding
 	SBYTE stairlock;	// -2 on first locked -1 after thinker done 0 normally
 	SWORD prevsec;		// -1 or number of sector for previous step

src/r_segs.cpp

@@ -2056,7 +2056,7 @@ int side_t::GetLightLevel (bool foggy, int baselight, int *pfakecontrast) const
 {
 	if (Flags & WALLF_ABSLIGHTING) 
 	{
-		baselight = (BYTE)Light;
+		baselight = Light;
 	}
 
 	if (pfakecontrast != NULL)
@@ -2098,7 +2098,7 @@ int side_t::GetLightLevel (bool foggy, int baselight, int *pfakecontrast) const
 			baselight += this->Light;
 		}
 	}
-	return clamp(baselight, 0, 255);
+	return baselight;
 }