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.

Physics Body

A SceneComponent with simulate-physics enabled. Driven by forces, gravity, collisions instead of explicit transforms.

SetActorScale3D — set actor world scale

NOT K2_ prefixed (unlike SetActorLocation/Rotation).

SetActorScale3D — set actor scale

FInterpTo — smoothly interpolate a float toward target each frame

Use with EventTick. DeltaTime from Tick, InterpSpeed controls how fast (e.g. 5.0).

MakeTransform — construct FTransform from location rotation scale

GetActorScale3D — get actor world scale

GetActorScale3D — get actor world scale

Pure node — no exec pins.

SpawnActorFromClass — spawn a new Actor into the world

Cast ReturnValue to the specific class to access its properties.

BreakTransform — decompose FTransform into location rotation scale