RetriggerableDelay — delay that resets if triggered again

UKismetSystemLibrary::RetriggerableDelay. Latent.

Create widget, add to viewport, and store reference

Pattern: EventBeginPlay → CreateWidget(OwningPlayer=GetPlayerController, WidgetType=WBP_MyWidget) → SetVariable(HUDWidget=ReturnValue) → CastTo<WBP_MyWidget>(HUDWidget) → Cast Succeeded → AddToViewport(ZOrder=0). Always store widget reference in a variable. CreateWidget inputs: 'OwningPlayer' (PlayerController) and 'WidgetType' (class). Exec in='execute', exec out='then'.

Health regeneration over time with timer

Pattern: Variables RegenRate(float)=5.0, RegenDelay(float)=3.0, RegenTimerHandle. On damage received: ClearTimer(RegenTimerHandle) → SET timer(RegenDelay, RegenTick, looping=true). RegenTick function: Branch(Health < MaxHealth) → True: SET Health = FClamp(Health + RegenRate*DeltaSeconds, 0, MaxHealth). False: ClearTimer.

Widget data binding: update UI automatically when variable changes

METHOD 1 - Function Binding (auto-updates every frame, easy but has perf cost): In Widget BP: select TextBlock → Details → Content → Text → click 'Bind' → Create Binding → connect your data (e.g. GetPlayerHealth as Text). METHOD 2 - Event-driven (recommended, update only when needed): In owning actor: when data changes → CastTo<WBP_HUD>(HUDWidget) → call custom function 'UpdateHealth(NewHealth)' on widget. In Widget BP: UpdateHealth function → SetText(HealthText, Conv_FloatToString(NewHealth)). KEY: Function bindings run every frame. For frequently-changing data (Tick-speed), use Event-driven approach instead to avoid perf issues.

RestartPlayer — respawn a player at a PlayerStart

Call on GameMode. The controller's StartSpot or nearest PlayerStart is used.

SetText (widget) — update Text block content at runtime

Call on a TextBlock widget variable from your Widget BP. Use 'Format Text' or 'Conv_StringToText' to build the Text value.

Create a Blueprint for a health pickup that restores health when overlapped by the player

Level transition: save data then open new level

Pattern: custom trigger or UI button → [save player data to SaveSlot] → OpenLevel(LevelName='Level_02', bAbsolute=true, Options=''). For loading screen: SetGlobalTimeDilation(0.001) briefly while level loads (freeze world), or use AsyncLoadLevel with progress callback. Key: OpenLevel is in GameplayStatics. 'LevelName' is the map asset name (not full path). bAbsolute=true discards current level completely. Options string can pass params like '?GameMode=BP_GM'.

SetActorTickInterval — change how often Tick fires

TickInterval=0.0 means every frame. TickInterval=0.1 means 10 times per second. Great for AI or non-critical logic that doesn't need per-frame updates.

GetGameState — get current game state