New API for assigning unique network ids to objects

src/common/objects/dobject.cpp

@@ -218,6 +218,8 @@ CCMD (dumpclasses)
 //
 //==========================================================================
 
+#include "d_net.h"
+
 void DObject::InPlaceConstructor (void *mem)
 {
 	new ((EInPlace *)mem) DObject;
@@ -317,6 +319,8 @@ void DObject::Release()
 
 void DObject::Destroy ()
 {
+	NetworkEntityManager::RemoveNetworkEntity(this);
+
 	// We cannot call the VM during shutdown because all the needed data has been or is in the process of being deleted.
 	if (PClass::bVMOperational)
 	{
@@ -504,8 +508,15 @@ void DObject::Serialize(FSerializer &arc)
 
 	SerializeFlag("justspawned", OF_JustSpawned);
 	SerializeFlag("spawned", OF_Spawned);
-
+	SerializeFlag("networked", OF_Networked);
+		
 	ObjectFlags |= OF_SerialSuccess;
+
+	if (arc.isReading() && (ObjectFlags & OF_Networked))
+	{
+		ClearNetworkID();
+		EnableNetworking(true);
+	}
 }
 
 void DObject::CheckIfSerialized () const
@@ -520,6 +531,73 @@ void DObject::CheckIfSerialized () const
 	}
 }
 
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+void DObject::SetNetworkID(const uint32_t id)
+{
+	if (!IsNetworked())
+	{
+		ObjectFlags |= OF_Networked;
+		_networkID = id;
+	}
+}
+
+void DObject::ClearNetworkID()
+{
+	ObjectFlags &= ~OF_Networked;
+	_networkID = NetworkEntityManager::WorldNetID;
+}
+
+void DObject::EnableNetworking(const bool enable)
+{
+	if (enable)
+		NetworkEntityManager::AddNetworkEntity(this);
+	else
+		NetworkEntityManager::RemoveNetworkEntity(this);
+}
+
+static unsigned int GetNetworkID(DObject* const self)
+{
+	return self->GetNetworkID();
+}
+
+DEFINE_ACTION_FUNCTION_NATIVE(DObject, GetNetworkID, GetNetworkID)
+{
+	PARAM_SELF_PROLOGUE(DObject);
+
+	ACTION_RETURN_INT(self->GetNetworkID());
+}
+
+static void EnableNetworking(DObject* const self, const bool enable)
+{
+	self->EnableNetworking(enable);
+}
+
+DEFINE_ACTION_FUNCTION_NATIVE(DObject, EnableNetworking, EnableNetworking)
+{
+	PARAM_SELF_PROLOGUE(DObject);
+	PARAM_BOOL(enable);
+
+	self->EnableNetworking(enable);
+	return 0;
+}
+
+static DObject* GetNetworkEntity(const unsigned int id)
+{
+	return NetworkEntityManager::GetNetworkEntity(id);
+}
+
+DEFINE_ACTION_FUNCTION_NATIVE(DObject, GetNetworkEntity, GetNetworkEntity)
+{
+	PARAM_PROLOGUE;
+	PARAM_UINT(id);
+
+	ACTION_RETURN_OBJECT(NetworkEntityManager::GetNetworkEntity(id));
+}
 
 DEFINE_ACTION_FUNCTION(DObject, MSTime)
 {

src/common/objects/dobject.h

@@ -351,6 +351,17 @@ protected:
 		friend T* Create(Args&&... args);
 
 	friend class JitCompiler;
+
+private:
+	// This is intentionally left unserialized.
+	uint32_t _networkID;
+
+public:
+	inline bool IsNetworked() const { return (ObjectFlags & OF_Networked); }
+	inline uint32_t GetNetworkID() const { return _networkID; }
+	void SetNetworkID(const uint32_t id);
+	void ClearNetworkID();
+	virtual void EnableNetworking(const bool enable);
 };
 
 // This is the only method aside from calling CreateNew that should be used for creating DObjects

src/common/objects/dobjgc.h

@@ -26,6 +26,7 @@ enum EObjectFlags
 	OF_Transient		= 1 << 11,		// Object should not be archived (references to it will be nulled on disk)
 	OF_Spawned			= 1 << 12,      // Thinker was spawned at all (some thinkers get deleted before spawning)
 	OF_Released			= 1 << 13,		// Object was released from the GC system and should not be processed by GC function
+	OF_Networked		= 1 << 14,		// Object has a unique network identifier that makes it synchronizable between all clients.
 };
 
 template<class T> class TObjPtr;