UKismetMathLibrary::RInterpTo_Constant

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Rotates from Current toward Target at a constant angular rate (degrees per second) rather than slowing as it approaches, unlike RInterpTo. Reaches Target exactly and stops once there.

Caveats & Gotchas

• InterpSpeed is degrees/second here, not a smoothing factor — the same number means something different than in RInterpTo, so don't reuse tuned values between the two functions.
• Good choice for turret or camera turn rates where a fixed angular speed is expected, whereas RInterpTo is better for a natural ease-in-ease-out feel.

Signature

static FRotator RInterpTo_Constant(FRotator Current, FRotator Target, float DeltaTime, float InterpSpeed)

Parameters

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

Return Type

FRotator

Example

Turn a turret toward a target at a fixed angular speed C++

void ATurret::Tick(float DeltaTime)
{
    Super::Tick(DeltaTime);
    FRotator NewRotation = UKismetMathLibrary::RInterpTo_Constant(GetActorRotation(), TargetRotation, DeltaTime, 45.0f);
    SetActorRotation(NewRotation);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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