feature(replication): Adds initial support for multiple clusters joining the same server.

For that, the attachment process is restructured.

Content/Config/ExampleConfigs/NDC_CaveUnwrap.ndisplay

@@ -8,7 +8,8 @@
 		{
 			"bFollowLocalPlayerCamera": false,
 			"bExitOnEsc": true,
-			"bOverrideViewportsFromExternalConfig": true
+			"bOverrideViewportsFromExternalConfig": true,
+			"bOverrideTransformsFromExternalConfig": false
 		},
 		"scene":
 		{

Source/RWTHVRCluster/Private/CaveSetup.cpp → Source/RWTHVRCluster/Private/CaveSetupComponent.cpp

 // Fill out your copyright notice in the Description page of Project Settings.
 
 
-#include "CaveSetup.h"
-
+#include "CaveSetupComponent.h"
+#include "LiveLinkPreset.h"
 #include "Logging/StructuredLog.h"
 #include "Utility/RWTHVRClusterUtilities.h"
 
-// Sets default values
-ACaveSetup::ACaveSetup()
+UCaveSetupComponent::UCaveSetupComponent()
 {
-	PrimaryActorTick.bCanEverTick = false;
-	SetActorEnableCollision(false);
-
-	// Actor needs to replicate, as it is attached to the pawn on the server.
-	bReplicates = true;
+	PrimaryComponentTick.bCanEverTick = false;
+	SetIsReplicatedByDefault(false);
 }
 
-// Called when the game starts or when spawned
-void ACaveSetup::BeginPlay()
+void UCaveSetupComponent::BeginPlay()
 {
 	Super::BeginPlay();
 
+
 	if (!URWTHVRClusterUtilities::IsRoomMountedMode())
 	{
 		UE_LOGFMT(RWTHVRCluster, Display, "CaveSetup: Not in RoomMountedMode, doing nothing.");
@@ -33,7 +29,7 @@ void ACaveSetup::BeginPlay()
 		if (const auto World = GetWorld())
 		{
 			const auto Actor = World->SpawnActor(ActorClass);
-			Actor->AttachToActor(this, FAttachmentTransformRules::SnapToTargetNotIncludingScale);
+			Actor->AttachToActor(GetOwner(), FAttachmentTransformRules::SnapToTargetNotIncludingScale);
 			UE_LOGFMT(RWTHVRCluster, Display, "CaveSetup: Spawned Actor {Actor} on the Cave and attached it.",
 					  Actor->GetName());
 		}

Source/RWTHVRCluster/Public/CaveSetup.h → Source/RWTHVRCluster/Public/CaveSetupComponent.h

@@ -3,23 +3,20 @@
 #pragma once
 
 #include "CoreMinimal.h"
-#include "LiveLinkPreset.h"
-#include "GameFramework/Actor.h"
-#include "CaveSetup.generated.h"
-
-/**
- * Simple Actor that needs to be added to the level which spawns Cave-related actors
- * such as the CaveOverlay.
- * It attaches itself to the Primary Node's Pawn and then replicates on the server.
- */
-
-UCLASS(hideCategories = (Rendering, Input, Actor, Base, Collision, Shape, Physics, HLOD))
-class RWTHVRCLUSTER_API ACaveSetup : public AActor
+
+#include "CaveSetupComponent.generated.h"
+
+class ULiveLinkPreset;
+
+UCLASS(ClassGroup = (Custom), meta = (BlueprintSpawnableComponent),
+	   hideCategories = (Rendering, Input, Actor, Base, Collision, Shape, Physics, HLOD))
+class RWTHVRCLUSTER_API UCaveSetupComponent : public UActorComponent
 {
 	GENERATED_BODY()
 
 public:
-	ACaveSetup();
+	// Sets default values for this component's properties
+	UCaveSetupComponent();
 
 	UPROPERTY(EditAnywhere)
 	TArray<UClass*> ActorsToSpawnOnCave;
@@ -28,6 +25,6 @@ public:
 	ULiveLinkPreset* LiveLinkPresetToApplyOnCave;
 
 protected:
-	// Called when the game starts or when spawned
+	// Called when the game starts
 	virtual void BeginPlay() override;
 };