EventAnyDamage — receive any type of damage

EnableInput — allow this actor to receive input events

Must call EnableInput(GetPlayerController(0)) before BindAction/BindAxis events fire on the actor.

EventRadialDamage — receive area/radial damage

Required input pin has no value wired to it

Why: The '{pin}' input on '{node}' must receive a value — either a wire from another node OR a default value in the pin field — but it's empty. Fix: Click on the '{pin}' input field on the '{node}' node. Either type a literal value (e.g. 5 for an integer), or drag a wire from another node's output. If you don't know what to connect, hover over the pin for a tooltip describing what it expects.

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.

Get

Reads a variable's current value. Drag a variable from the My Blueprint panel and choose Get.

Spawn projectile from socket location facing forward

Pattern: InputAction Fire → GetMesh → GetSocketTransform(InSocketName='MuzzleSocket') → BreakTransform(outputs Location, Rotation) → MakeTransform(Location=SocketLocation, Rotation=SocketRotation) → SpawnActorFromClass(Class=BP_Projectile, SpawnTransform=Transform). Key: GetSocketTransform must be called on the SkeletalMeshComponent (GetMesh()), not the actor. Use 'World' TransformSpace. SpawnActorFromClass takes a full Transform, not separate Location/Rotation.

Array Get — get element at index from array

Pure node. Does NOT bounds-check — will throw if Index >= array length.

AddImpulse — apply instant impulse to physics body

One-shot force. bVelChange=true treats Impulse as velocity change.