Camera

Defines a viewpoint into the world. The active PlayerController's view comes from one camera at a time.

CalcCamera — get the camera view from an actor (used for custom cameras)

GetPlayerViewPoint — get camera world location and rotation

Outputs are 'Location' and 'Rotation' — NOT ReturnValue. Used for line traces from camera.

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.

Interactable interface system with line trace from camera

Pattern: BPI_Interactable interface with Interact(APawn* Caller) and GetInteractText(). Player Tick: GetPlayerCameraManager → GetCameraLocation/Rotation → LineTraceSingle(CamLoc, CamLoc + Forward*InteractDistance) → BreakHitResult → HitActor → DoesImplementInterface(BPI_Interactable) → True: show UI prompt, store as FocusedActor. Interact input → call Interact(Self) on FocusedActor.

Smooth camera follow with spring arm using RInterpTo

Pattern in PlayerController or Character: EventTick → GetControlRotation → RInterpTo(Current=CurrentCameraRot, Target=ControlRotation, DeltaTime=DeltaSeconds, InterpSpeed=10.0) → SetControlRotation(NewRotation=InterpResult). OR: use SpringArmComponent with CameraLagSpeed and bEnableCameraLag=true for physics-based follow. RInterpTo: 'Current' and 'Target' are Rotators. DeltaTime from Tick's 'DeltaSeconds' output.

StartCameraShake — play camera shake effect

APlayerCameraManager method. Use ClientStartCameraShake on PlayerController.

SetFieldOfView — set camera field of view angle

UCameraComponent method. Default 90.

Line trace from camera to detect what player is looking at

Pattern: GetPlayerController → GetPlayerViewPoint(outputs Location,Rotation) → GetForwardVector(Rotation) → Multiply_VectorFloat(A=Forward, B=TraceDistance) → Add_VectorVector(A=CameraLocation, B=Offset) → LineTraceByChannel(Start=CameraLocation, End=TraceEnd). GetPlayerViewPoint exec in='execute', exec out='then', outputs: 'Location' (Vector) and 'Rotation' (Rotator).

Smooth zoom with mouse wheel on spring arm camera

Pattern: Variables TargetArmLength(float), MinZoom(float)=200, MaxZoom(float)=2000, ZoomStep(float)=50, ZoomSpeed(float)=5. InputAxis MouseWheel: TargetArmLength = FClamp(TargetArmLength - AxisValue*ZoomStep, MinZoom, MaxZoom). Tick: SpringArm.TargetArmLength = FInterpTo(Current, TargetArmLength, DeltaSeconds, ZoomSpeed). FInterpTo provides smooth easing.