- removed PClass::DeriveData because it is no longer needed.

- fixed: IsVisibleToPlayer and optimized it a bit more.
- moved SourceLumpName to PClass, so that it can also be used for non-actors (there's a lot of non-Actor classes already.)
- separated the serializer for PClassPointer from PPointer. Even though not doable, a pointer to a class type is something entirely different than a class pointer with a restriction so each should handle its own case.

src/dobject.cpp

@@ -91,7 +91,7 @@ CCMD (dumpactors)
 		"25:DoomStrifeChex", "26:HereticStrifeChex", "27:NotHexen",	"28:HexenStrifeChex", "29:NotHeretic",
 		"30:NotDoom", "31:All",
 	};
-	Printf("%i object class types total\nActor\tEd Num\tSpawnID\tFilter\tSource\n", PClass::AllClasses.Size());
+	Printf("%u object class types total\nActor\tEd Num\tSpawnID\tFilter\tSource\n", PClass::AllClasses.Size());
 	for (unsigned int i = 0; i < PClass::AllClasses.Size(); i++)
 	{
 		PClass *cls = PClass::AllClasses[i];
@@ -102,11 +102,11 @@ CCMD (dumpactors)
 			Printf("%s\t%i\t%i\t%s\t%s\n",
 				acls->TypeName.GetChars(), ainfo->DoomEdNum,
 				ainfo->SpawnID, filters[ainfo->GameFilter & 31],
-				acls->ActorInfo()->SourceLumpName.GetChars());
+				acls->SourceLumpName.GetChars());
 		}
 		else if (cls != NULL)
 		{
-			Printf("%s\tn/a\tn/a\tn/a\tEngine (not an actor type)\n", cls->TypeName.GetChars());
+			Printf("%s\tn/a\tn/a\tn/a\tEngine (not an actor type)\tSource: %s\n", cls->TypeName.GetChars(), cls->SourceLumpName.GetChars());
 		}
 		else
 		{

src/dobjtype.cpp

@@ -1421,16 +1421,7 @@ void PPointer::WriteValue(FSerializer &ar, const char *key,const void *addr) con
 {
 	if (PointedType->IsKindOf(RUNTIME_CLASS(PClass)))
 	{
-		auto pt = static_cast<PClass*>(PointedType);
-
-		if (pt->IsDescendantOf(RUNTIME_CLASS(PClass)))
-		{
-			ar(key, *(PClass **)addr);
-		}
-		else
-		{
-			ar(key, *(DObject **)addr);
-		}
+		ar(key, *(DObject **)addr);
 	}
 	else if (writer != nullptr)
 	{
@@ -1452,17 +1443,8 @@ bool PPointer::ReadValue(FSerializer &ar, const char *key, void *addr) const
 {
 	if (PointedType->IsKindOf(RUNTIME_CLASS(PClass)))
 	{
-		auto pt = static_cast<PClass*>(PointedType);
-		bool res = true;
-
-		if (pt->IsDescendantOf(RUNTIME_CLASS(PClass)))
-		{
-			::Serialize(ar, key, *(PClass **)addr, (PClass**)nullptr);
-		}
-		else
-		{
-			::Serialize(ar, key, *(DObject **)addr, nullptr, &res);
-		}
+		bool res;
+		::Serialize(ar, key, *(DObject **)addr, nullptr, &res);
 		return res;
 	}
 	else if (reader != nullptr)
@@ -1550,13 +1532,34 @@ PClassPointer::PClassPointer(PClass *restrict)
 {
 	if (restrict) mDescriptiveName.Format("ClassPointer<%s>", restrict->TypeName.GetChars());
 	else mDescriptiveName = "ClassPointer";
-	// class pointers do not need write barriers because all classes are stored in the global type table and won't get collected.
-	// This means we can use the cheapoer non-barriered opcodes here.
-	loadOp = OP_LOS;
+	loadOp = OP_LP;
 	storeOp = OP_SP;
 	mVersion = restrict->mVersion;
 }
 
+//==========================================================================
+//
+// PPointer :: WriteValue
+//
+//==========================================================================
+
+void PClassPointer::WriteValue(FSerializer &ar, const char *key, const void *addr) const
+{
+	ar(key, *(PClass **)addr);
+}
+
+//==========================================================================
+//
+// PPointer :: ReadValue
+//
+//==========================================================================
+
+bool PClassPointer::ReadValue(FSerializer &ar, const char *key, void *addr) const
+{
+	::Serialize(ar, key, *(PClass **)addr, (PClass**)nullptr);
+	return false;
+}
+
 //==========================================================================
 //
 // PClassPointer - isCompatible
@@ -3304,18 +3307,6 @@ void PClass::InitializeDefaults()
 	}
 }
 
-//==========================================================================
-//
-// PClass :: DeriveData
-//
-// Copies inheritable data to the child class.
-//
-//==========================================================================
-
-void PClass::DeriveData(PClass *newclass)
-{
-}
-
 //==========================================================================
 //
 // PClass :: CreateDerivedClass
@@ -3365,7 +3356,6 @@ PClass *PClass::CreateDerivedClass(FName name, unsigned int size)
 	{
 		type->InitializeDefaults();
 		type->Virtuals = Virtuals;
-		DeriveData(type);
 	}
 	else
 		type->ObjectFlags &= OF_Transient;

src/dobjtype.h

@@ -429,6 +429,8 @@ public:
 	class PClass *ClassRestriction;
 
 	bool isCompatible(PType *type);
+	void WriteValue(FSerializer &ar, const char *key, const void *addr) const override;
+	bool ReadValue(FSerializer &ar, const char *key, void *addr) const override;
 
 	void SetPointer(void *base, unsigned offset, TArray<size_t> *special = NULL) const override;
 	virtual bool IsMatch(intptr_t id1, intptr_t id2) const;
@@ -600,7 +602,6 @@ public:
 	bool ReadAllFields(FSerializer &ar, void *addr) const;
 	void InitializeDefaults();
 	int FindVirtualIndex(FName name, PPrototype *proto);
-	virtual void DeriveData(PClass *newclass);
 
 	static void StaticInit();
 	static void StaticShutdown();
@@ -619,6 +620,7 @@ public:
 	bool				 bExported;		// This type has been declared in a script
 	bool				 bDecorateClass;	// may be subject to some idiosyncracies due to DECORATE backwards compatibility
 	TArray<VMFunction*>	 Virtuals;	// virtual function table
+	FName				SourceLumpName;
 
 	void (*ConstructNative)(void *);
 

src/info.cpp

@@ -307,18 +307,6 @@ PClassActor::~PClassActor()
 {
 }
 
-//==========================================================================
-//
-// PClassActor :: Derive
-//
-//==========================================================================
-
-void PClassActor::DeriveData(PClass *newclass)
-{
-	assert(newclass->IsKindOf(RUNTIME_CLASS(PClassActor)));
-	PClassActor *newa = static_cast<PClassActor *>(newclass);
-}
-
 //==========================================================================
 //
 // PClassActor :: SetReplacement

src/info.h

@@ -247,8 +247,7 @@ struct FActorInfo
 	uint8_t GameFilter = GAME_Any;
 	uint16_t SpawnID = 0;
 	uint16_t ConversationID = 0;
-	int16_t DoomEdNum = 0;
-	FString SourceLumpName;
+	int16_t DoomEdNum = -1;
 
 	FStateLabels *StateList = nullptr;
 	DmgFactors DamageFactors;
@@ -294,7 +293,6 @@ protected:
 public:
 	static void StaticInit ();
 	static void StaticSetActorNums ();
-	virtual void DeriveData(PClass *newclass);
 
 	PClassActor();
 	~PClassActor();

src/p_mobj.cpp

@@ -1605,11 +1605,14 @@ bool AActor::IsVisibleToPlayer() const
 		(signed)(VisibleToTeam-1) != players[consoleplayer].userinfo.GetTeam() )
 		return false;
 
+	auto &vis = GetInfo()->VisibleToPlayerClass;
+	if (vis.Size() == 0) return true;	// early out for the most common case.
+
 	const player_t* pPlayer = players[consoleplayer].camera->player;
 
 	if (pPlayer)
 	{
-		for(auto cls : GetInfo()->VisibleToPlayerClass)
+		for(auto cls : vis)
 		{
 			if (cls && pPlayer->mo->GetClass()->IsDescendantOf(cls))
 			{

src/scripting/decorate/thingdef_parse.cpp

@@ -1109,7 +1109,7 @@ static PClassActor *ParseActorHeader(FScanner &sc, Baggage *bag)
 	{
 		PClassActor *info = CreateNewActor(sc, typeName, parentName);
 		info->ActorInfo()->DoomEdNum = DoomEdNum > 0 ? DoomEdNum : -1;
-		info->ActorInfo()->SourceLumpName = Wads.GetLumpFullPath(sc.LumpNum);
+		info->SourceLumpName = Wads.GetLumpFullPath(sc.LumpNum);
 
 		if (!info->SetReplacement(replaceName))
 		{

src/scripting/zscript/zcc_compile.cpp

@@ -625,8 +625,7 @@ void ZCCCompiler::CreateClassTypes()
 						DPrintf(DMSG_SPAMMY, "Registered %s as native with parent %s\n", me->TypeName.GetChars(), parent->TypeName.GetChars());
 					}
 					c->cls->Type = me;
-					auto ac = dyn_cast<PClassActor>(me);
-					if (ac != nullptr) ac->ActorInfo()->SourceLumpName = *c->cls->SourceName;
+					me->SourceLumpName = *c->cls->SourceName;
 				}
 				else
 				{
@@ -2194,7 +2193,6 @@ void ZCCCompiler::InitDefaults()
 				FString mename = ti->TypeName.GetChars();
 
 				ti->InitializeDefaults();
-				ti->ParentClass->DeriveData(ti);
 			}
 		}
 		else
@@ -2215,7 +2213,6 @@ void ZCCCompiler::InitDefaults()
 				auto ti = static_cast<PClassActor *>(c->Type());
 
 				ti->InitializeDefaults();
-				ti->ParentClass->DeriveData(ti);
 
 				// We need special treatment for this one field in AActor's defaults which cannot be made visible to DECORATE as a property.
 				// It's better to do this here under controlled conditions than deeper down in the class type classes.