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.

Performance optimization checklist for Blueprints

1. TICK MANAGEMENT: - Disable tick on static actors (SetActorTickEnabled=false). - Use SetActorTickInterval(0.1-0.5) for AI, non-critical systems. - Prefer event-driven over tick polling where possible. 2. AVOID EVERY-TICK EXPENSIVE CALLS: - GetAllActorsOfClass: cache in BeginPlay, refresh only when needed. - CastTo: cache result in variable after first cast. - GetComponentByClass: call once and store reference. 3. VISIBILITY: - SetActorHiddenInGame + SetActorTickEnabled=false for off-screen actors. - Use LOD (Level of Detail) on meshes. 4. SPAWNING: - Use object pooling for frequently spawned/destroyed actors (bullets, effects). 5. EVENTS OVER POLLING: - Use overlap events instead of periodic distance checks. - Use delegates/dispatchers instead of checking conditions each frame.

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.

SetGlobalTimeDilation — speed up or slow down game time

UGameplayStatics. 1.0=normal, 0.5=half speed, 2.0=double speed. Minimum 0.0001.

SetGlobalTimeDilation — slow down or speed up the entire game

1.0=normal, 0.5=half speed, 0.0=pause. Affects physics, animations, timers.

Event Tick — fires every frame with DeltaSeconds

GetWorldDeltaSeconds — get this frame's delta time in seconds

Pure node. Same value as EventTick's DeltaSeconds output. Use for frame-rate-independent motion.

GetWorldDeltaSeconds — get time between frames

UGameplayStatics::GetWorldDeltaSeconds. Same as EventTick DeltaSeconds.

LaunchCharacter — launch character with velocity

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