UKismetMathLibrary::FInterpTo_Constant

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Moves a float value from Current toward Target at a constant rate (InterpSpeed units per second), unlike FInterpTo which slows as it approaches the target. Produces a linear ramp that reaches Target exactly and then stops.

Caveats & Gotchas

• Unlike FInterpTo, this does reach Target exactly and clamps there — it won't overshoot even with a large DeltaTime.
• InterpSpeed here is a rate (units/second), not a smoothing factor, so the same numeric value behaves very differently between FInterpTo and FInterpTo_Constant — don't swap one call for the other without adjusting the speed parameter.

Signature

static double FInterpTo_Constant(double Current, double Target, double DeltaTime, double InterpSpeed)

Parameters

Name	Type	Description	Default
Current	double	The actual value this tick.	—
Target	double	The value being tracked.	—
DeltaTime	double	Time since the last update, typically the frame's delta time.	—
InterpSpeed	double	Constant rate of change per second.	—

Return Type

double

Example

Drain a stamina value at a fixed rate C++

void AMyCharacter::Tick(float DeltaTime)
{
    Super::Tick(DeltaTime);
    Stamina = UKismetMathLibrary::FInterpTo_Constant(Stamina, 0.0, DeltaTime, 10.0);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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