Create a Blueprint for a simple FPS weapon that shoots raycasts and deals damage

Physics Body

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

Smooth camera follow with lag using VInterpTo every tick

Pattern: EventTick → GetActorLocation(TargetActor) → VInterpTo(CurrentCameraLocation, TargetLocation, DeltaSeconds, InterpSpeed) → SetActorLocation(Camera, Result). InterpSpeed 3-10 for smooth follow. Alternative: use SpringArmComponent with CameraLag enabled.

Rotate actor on tick with frame-rate independence using DeltaSeconds

Pattern: EventTick → DeltaSeconds output → Multiply_FloatFloat(DeltaSeconds, RotationSpeed) → MakeRotator(0, 0, Result) → K2_AddActorWorldRotation(MakeRotator output). Always multiply by DeltaSeconds. Use K2_AddActorLocalRotation for self-relative spin. RotationSpeed variable default ~30-90 degrees/sec.

Event Tick — fires every frame with DeltaSeconds

Camera shake on damage feedback for player

Pattern: On EventAnyDamage → GetPlayerController(0) → GetPlayerCameraManager → StartCameraShake(DamageShakeClass, MapRangeClamped(Damage, 0, 100, 0.3, 1.0)). Create CameraShakeClass as BP extending UCameraShakeBase with RotOscillation and LocOscillation settings.

FInterpTo_Constant — constant-speed interpolation toward target

Moves at constant speed unlike FInterpTo which decelerates.

Respawn system: death → delay → respawn at PlayerStart

In Character BP: OnDied (custom event) → SetActorHiddenInGame(true) → SetActorEnableCollision(false) → Disable input: GetController → DisableInput → Delay(Duration=3.0) → GetGameMode → CastTo<BP_GameMode> → RestartPlayer(GetController) → SetActorHiddenInGame(false) → SetActorEnableCollision(true) → EnableInput. In GameMode RestartPlayer: Gets nearest PlayerStart → SetActorLocation to PlayerStart → calls OnPossess. OR manual: GetAllActorsOfClass(PlayerStart) → Random select → SetActorLocationAndRotation(PlayerStart.Location, PlayerStart.Rotation).

Spawn system with wave management for enemies

Pattern: Variables CurrentWave(int)=0, EnemiesAlive(int)=0, EnemiesPerWave(Array<int>). StartWave: CurrentWave++ → SET EnemiesAlive=EnemiesPerWave[CurrentWave]. Timer looping: Branch(SpawnedThisWave < EnemiesPerWave[CurrentWave]) → SpawnActor(EnemyClass, RandomSpawnPoint) → SpawnedThisWave++. OnEnemyDeath: EnemiesAlive-- → Branch(EnemiesAlive <= 0) → StartNextWave or Victory.

LaunchCharacter — launch character with velocity

ACharacter::LaunchCharacter. Good for knockback, bouncing, jumppads.