UKismetMathLibrary::WeightedMovingAverage_FVector

function Engine Blueprint Since unknown

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Blends a new vector sample with the previous smoothed value to produce the next value in a weighted moving average series. Commonly used to smooth camera or velocity vectors.

Caveats & Gotchas

• This is stateless — you must store PreviousSample yourself between calls, typically once per Tick.
• Each axis is blended independently with a linear interpolation, so smoothing a direction vector this way does not renormalize the result; renormalize afterward if you need a unit vector.
• As with the float overload, Weight is applied per call rather than per second, so smoothing feels different at different frame rates unless you account for DeltaTime yourself.

Signature

static FVector WeightedMovingAverage_FVector(FVector CurrentSample, FVector PreviousSample, float Weight)

Parameters

Name	Type	Description	Default
CurrentSample	FVector	The newest raw vector value to blend in.	—
PreviousSample	FVector	The previously smoothed vector from the series.	—
Weight	float	Blend factor toward CurrentSample; higher values track the current sample more closely.	—

Return Type

FVector

Example

Smooth a camera's look-at target C++

// SmoothedTarget is a member FVector
SmoothedTarget = UKismetMathLibrary::WeightedMovingAverage_FVector(RawTargetLocation, SmoothedTarget, 0.15f);
CameraComponent->SetWorldLocation(SmoothedTarget);

Version History

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

Feedback

Was this helpful?