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Knowledge base
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.