Widget health bar HUD that updates from player health variable

Pattern: WBP_HealthBar with ProgressBar(HealthBar, BindWidget). Player BeginPlay: CreateWidget(WBP_HealthBar, PC) → SET WidgetRef → AddToViewport. On health change: WidgetRef → SetPercent(HealthBar, CurrentHealth/MaxHealth). Alternative: use property binding in widget designer for auto-update.

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.

Health system: take damage, clamp health, check death

Pattern: EventAnyDamage → Subtract_FloatFloat(A=CurrentHealth, B=Damage) → Clamp(Value=Result, Min=0, Max=MaxHealth) → SetVariable(Health=ClampResult) → Branch(Condition=(Health <= 0)) → True: call OnDeath custom event. Variables needed: Health (float), MaxHealth (float). EventAnyDamage output pin is 'Damage' (float). Clamp inputs: 'Value', 'Min', 'Max'. All floats.

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

Create widget and add to viewport for HUD

Pattern: BeginPlay → CreateWidget(WidgetClass, GetPlayerController(0)) → store as variable → AddToViewport(Widget, ZOrder=0). Remove: RemoveFromParent(Widget). Toggle: SetVisibility(Collapsed/Visible). Create once, toggle visibility — never recreate every frame. For interaction: SetInputModeUIOnly + SetShowMouseCursor.

Clamp

Bounds a value between Min and Max. Useful for clamping health to [0, MaxHealth] etc.

SetPercent on ProgressBar — set progress bar fill amount

UProgressBar::SetPercent. 0.0 to 1.0 range.

Create a Blueprint Actor with health variable that takes damage and destroys itself when health reaches zero

Health and damage system with ApplyDamage and EventAnyDamage

Dealing damage: Event → ApplyDamage(TargetActor, BaseDamage, InstigatorController, DamageCauser, DamageTypeClass). Receiving: EventAnyDamage → Damage output → Subtract_FloatFloat(CurrentHealth, Damage) → FClamp(Result, 0, MaxHealth) → SET CurrentHealth → Branch(CurrentHealth <= 0) → True: DestroyActor. Initialize CurrentHealth=MaxHealth in BeginPlay.

SetPercent — set ProgressBar fill amount (0.0 to 1.0)

InPercent: 0.0=empty, 1.0=full. Use Divide to convert (CurrentHealth/MaxHealth).