UBlendSpace::FilterInput

function Engine Since 4.0

#include "Animation/BlendSpace.h"

Access: public Specifiers: const

Description

Smooths a raw blend input over time using the given filter's InterpolationParam settings, returning the filtered position to sample with.

Caveats & Gotchas

• Filter must have been set up via InitializeFilter first — calling this on a default-constructed FBlendFilter produces incorrect smoothing.
• Must be called every tick with a consistent Filter instance; skipping ticks or swapping filters mid-stream breaks the smoothing continuity.

Signature

ENGINE_API FVector FilterInput(FBlendFilter* Filter, const FVector& BlendInput, float DeltaTime) const;

Parameters

Name	Type	Description	Default
Filter	FBlendFilter*	Filter previously set up with InitializeFilter.	—
BlendInput	const FVector&	Raw, unfiltered blend input for this tick.	—
DeltaTime	float	Time since the last filter update, used to scale the smoothing.	—

Return Type

FVector

Example

Filter then sample per tick C++

const FVector FilteredInput = MyBlendSpace->FilterInput(&Filter, RawBlendInput, DeltaTime);
TArray<FBlendSampleData> SampleDataList;
int32 CachedIndex = INDEX_NONE;
MyBlendSpace->GetSamplesFromBlendInput(FilteredInput, SampleDataList, CachedIndex, true);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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