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.

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.

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.

Smooth float variable change using FInterpTo on EventTick

Pattern: EventTick → FInterpTo(Current=CurrentValue, Target=TargetValue, DeltaTime=DeltaSeconds, InterpSpeed=5.0) → SetVariable(CurrentValue=InterpResult) → [use CurrentValue for UI or material or rotation]. Key: FInterpTo inputs: 'Current' (current float), 'Target' (goal float), 'DeltaTime' (from Tick's 'DeltaSeconds' output), 'InterpSpeed' (how fast, try 3-10). The result approaches Target exponentially — it never exactly reaches Target (use Branch + Clamp if needed).

Smooth rotation toward a target location using RInterpTo on Tick

Pattern: EventTick → FindLookAtRotation(Start=GetActorLocation, Target=TargetLocation) → RInterpTo(Current=GetActorRotation, Target=LookAt, DeltaTime=DeltaSeconds, InterpSpeed=5.0) → SetActorRotation(NewRotation=InterpResult). Key pins: FindLookAtRotation inputs are 'Start' and 'Target' (both Vectors). RInterpTo inputs: 'Current' (Rotator), 'Target' (Rotator), 'DeltaTime' (float), 'InterpSpeed' (float). SetActorRotation input: 'NewRotation' (Rotator).

RInterpTo — smooth rotator interpolation toward target over time

FInterpTo — smoothly interpolate a float toward target each frame

Use with EventTick. DeltaTime from Tick, InterpSpeed controls how fast (e.g. 5.0).

Create a Blueprint for a spotlight that follows the player smoothly using RInterpTo

VInterpTo — smooth vector interpolation toward target over time

SetViewTargetWithBlend — smoothly blend camera to a new view target

BlendTime in seconds. BlendFunc: VTBlend_Linear, VTBlend_Cubic, VTBlend_EaseIn, VTBlend_EaseOut. Call on the PlayerController.