PIE

Play In Editor — runs the game inside the editor process for fast iteration. Some systems behave differently in PIE vs Standalone.

Editor

Unreal Editor — the desktop app you build games in. Plugins and tools (like WoalzCraft) extend it.

StopMontage — stop a currently playing AnimMontage

Possess — make a Controller possess a Pawn

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.

IsLocalController — true if this controller is locally controlled

Pure node. Use on PlayerController to check if it belongs to the local player.

UnPossess — detach Controller from currently possessed Pawn

PlayMontage — play animation montage

ACharacter::PlayAnimMontage. Returns duration. Alternative: Montage_Play on AnimInstance.

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.

Not_PreBool — logical NOT