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Source/CAVEOverlay/Private/CAVEOverlay.cpp

 // Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
 
 #include "CAVEOverlay.h"
+#include "CAVEOverlaySettings.h"
+#include "CAVEOverlayController.h"
+#include "Kismet/GameplayStatics.h"
 
 #define LOCTEXT_NAMESPACE "FCAVEOverlayModule"
 
 void FCAVEOverlayModule::StartupModule()
 {
 	// This code will execute after your module is loaded into memory; the exact timing is specified in the .uplugin file per-module
+
+	On_Post_World_Initialization_Delegate.BindRaw(this, &FCAVEOverlayModule::OnSessionStart);
+	FWorldDelegates::OnPostWorldInitialization.Add(On_Post_World_Initialization_Delegate);
 }
 
+void FCAVEOverlayModule::OnSessionStart(UWorld* World, const UWorld::InitializationValues)
+{
+	if (!World->IsGameWorld())
+		return;
+
+	const UCAVEOverlaySettings* Settings = GetDefault<UCAVEOverlaySettings>();
+
+	//Test if already in
+	TArray<AActor*> Actors;
+	UGameplayStatics::GetAllActorsOfClass(World, ACAVEOverlayController::StaticClass(), Actors);
+
+	if((Settings->DefaultActivationType == DefaultActivationType_ON
+		!= Settings->excludedMaps.ContainsByPredicate(
+			[World](const FSoftObjectPath& Map)	{return Map.GetAssetName() == World->GetName();}
+		)) && Actors.Num() == 0){
+		World->SpawnActor(ACAVEOverlayController::StaticClass());
+	}
+}
+
+
 void FCAVEOverlayModule::ShutdownModule()
 {
 	// This function may be called during shutdown to clean up your module.  For modules that support dynamic reloading,