GetPlayerCameraManager — get camera manager for player

Spawn system with wave management for enemies

Pattern: Variables CurrentWave(int)=0, EnemiesAlive(int)=0, EnemiesPerWave(Array<int>). StartWave: CurrentWave++ → SET EnemiesAlive=EnemiesPerWave[CurrentWave]. Timer looping: Branch(SpawnedThisWave < EnemiesPerWave[CurrentWave]) → SpawnActor(EnemyClass, RandomSpawnPoint) → SpawnedThisWave++. OnEnemyDeath: EnemiesAlive-- → Branch(EnemiesAlive <= 0) → StartNextWave or Victory.

Game subsystem: persistent game manager with auto-init

SETUP: Create Blueprint inheriting UGameInstanceSubsystem (or UWorldSubsystem for level-scoped). Override Initialize(Collection) to set up. Override Deinitialize to clean up. Add game variables here (Score, PlayTime, Settings). ACCESS FROM ANYWHERE: GetGameInstance → GetSubsystem(BP_GameSubsystem) → CastTo<BP_GameSubsystem> → access variables. WHY: Subsystems auto-create, auto-destroy, and don't need FindActor. Better than GameInstance for well-organized systems. UGameInstanceSubsystem persists across levels. UWorldSubsystem is recreated each level.

Sound manager singleton for playing music and SFX with volume control

Pattern: Put in GameInstance for persistence. Variables MusicVolume(float)=1.0, SFXVolume(float)=1.0, CurrentMusic(AudioComponent). PlayMusic: IsValid(CurrentMusic) → Stop → SpawnSound2D(MusicAsset, MusicVolume) → store ref. PlaySFX: PlaySound2D(SFXAsset, SFXVolume). SetMusicVolume: SetVolumeMultiplier(CurrentMusic, NewVol). Save volumes to SaveGame.

Possess — make a Controller possess a Pawn

GetController — get the Controller possessing this Pawn

Pure node. Cast to AIController or PlayerController. Returns null if not possessed.

string

string

Pickup and collectible system with overlap trigger

Pattern: Pickup actor with SphereCollision(overlap), StaticMesh visual. OnComponentBeginOverlap → CastTo PlayerCharacter → Success: call AddScore/AddItem interface on player → PlaySoundAtLocation → SpawnEmitterAtLocation → DestroyActor(self). Set collision to OverlapOnlyPawn for performance.

GetPlayerController — get the PlayerController for a player index

GetPlayerController — get player controller by index

UGameplayStatics::GetPlayerController. Index 0 for single player.