- Added a new field to the Actor class which stores the amount of ticks passed since the game started on the moment the actor was spawned.

- Added a function to the Actor class to get its spawn time relative to the current level.
- Added spawn time information to the output of the "info" console command.

src/actor.h

@@ -1033,6 +1033,8 @@ public:
 	void AttachLight(unsigned int count, const FLightDefaults *lightdef);
 	void SetDynamicLights();
 
+	// When was this actor spawned? (relative to the current level)
+	int GetLevelSpawnTime() const;
 
 // info for drawing
 // NOTE: The first member variable *must* be snext.
@@ -1262,6 +1264,9 @@ public:
 	int PrevPortalGroup;
 	TArray<TObjPtr<AActor*> > AttachedLights;
 
+	// When was this actor spawned?
+	int SpawnTime;
+
 	// ThingIDs
 	static void ClearTIDHashes ();
 	void AddToHash ();

src/p_mobj.cpp

@@ -348,6 +348,7 @@ DEFINE_FIELD(AActor, BloodTranslation)
 DEFINE_FIELD(AActor, RenderHidden)
 DEFINE_FIELD(AActor, RenderRequired)
 DEFINE_FIELD(AActor, friendlyseeblocks)
+DEFINE_FIELD(AActor, SpawnTime)
 
 //==========================================================================
 //
@@ -528,8 +529,9 @@ void AActor::Serialize(FSerializer &arc)
 		A("selfdamagefactor", SelfDamageFactor)
 		A("stealthalpha", StealthAlpha)
 		A("renderhidden", RenderHidden)
-		A("renderrequired", RenderRequired);
-		A("friendlyseeblocks", friendlyseeblocks);
+		A("renderrequired", RenderRequired)
+		A("friendlyseeblocks", friendlyseeblocks)
+		A("spawntime", SpawnTime);
 }
 
 #undef A
@@ -5006,6 +5008,7 @@ AActor *AActor::StaticSpawn (PClassActor *type, const DVector3 &pos, replace_t a
 	AActor *actor;
 	
 	actor = static_cast<AActor *>(const_cast<PClassActor *>(type)->CreateNew ());
+	actor->SpawnTime = level.totaltime;
 
 	// Set default dialogue
 	actor->ConversationRoot = GetConversation(actor->GetClass()->TypeName);
@@ -8063,6 +8066,25 @@ void AActor::SetTranslation(FName trname)
 	// silently ignore if the name does not exist, this would create some insane message spam otherwise.
 }
 
+//==========================================================================
+//
+// AActor :: GetLevelSpawnTime
+//
+// Returns the time when this actor was spawned, 
+// relative to the current level.
+//
+//==========================================================================
+int AActor::GetLevelSpawnTime() const
+{
+	return SpawnTime - level.totaltime + level.time;
+}
+
+DEFINE_ACTION_FUNCTION(AActor, GetLevelSpawnTime)
+{
+	PARAM_SELF_PROLOGUE(AActor);
+	ACTION_RETURN_INT(self->GetLevelSpawnTime());
+}
+
 //---------------------------------------------------------------------------
 //
 // PROP A_RestoreSpecialPosition
@@ -8587,5 +8609,8 @@ void PrintMiscActorInfo(AActor *query)
 		Printf("FriendlySeeBlocks: %d\n", query->friendlyseeblocks);
 		Printf("Target: %s\n", query->target ? query->target->GetClass()->TypeName.GetChars() : "-");
 		Printf("Last enemy: %s\n", query->lastenemy ? query->lastenemy->GetClass()->TypeName.GetChars() : "-");
+		Printf("Spawn time: %d ticks (%f seconds) after game start, %d ticks (%f seconds) after level start\n", 
+			query->SpawnTime, (double) query->SpawnTime / TICRATE,
+			query->GetLevelSpawnTime(), (double) query->GetLevelSpawnTime() / TICRATE);
 	}
 }

src/version.h

@@ -91,7 +91,7 @@ const char *GetVersionString();
 
 // Use 4500 as the base git save version, since it's higher than the
 // SVN revision ever got.
-#define SAVEVER 4552
+#define SAVEVER 4553
 
 // This is so that derivates can use the same savegame versions without worrying about engine compatibility
 #define GAMESIG "GZDOOM"

wadsrc/static/zscript/actor.txt

@@ -234,6 +234,7 @@ class Actor : Thinker native
 	native int RenderHidden;
 	native int RenderRequired;
 	native readonly int FriendlySeeBlocks;
+	native readonly int SpawnTime;
 
 	meta String Obituary;		// Player was killed by this actor
 	meta String HitObituary;		// Player was killed by this actor in melee
@@ -708,6 +709,7 @@ class Actor : Thinker native
 	native void GiveSecret(bool printmsg = true, bool playsound = true);
 	native clearscope double GetCameraHeight() const;
 	native clearscope double GetGravity() const;
+	native clearscope int GetLevelSpawnTime() const;
 
 	native bool CheckClass(class<Actor> checkclass, int ptr_select = AAPTR_DEFAULT, bool match_superclass = false);
 	native void AddInventory(Inventory inv);