UKismetMathLibrary::MakeRotFromX

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Builds a rotator whose forward axis aligns with the given vector. Y and Z axes are chosen to be orthonormal but are otherwise arbitrary.

Caveats & Gotchas

• Because only the X axis is constrained, the Roll component is underdetermined — the engine picks an arbitrary roll that may not match expectations, especially for camera or character orientation.
• Passing a zero vector produces a degenerate result without assertion; always ensure the input is non-zero.

Signature

static UE_INL_API FRotator MakeRotFromX(const FVector& X);

Parameters

Name	Type	Description	Default
X	const FVector&	The desired forward (X) axis direction. Does not need to be normalized.	—

Return Type

FRotator

Example

Orient an arrow component toward a target C++

FVector Dir = (Target->GetActorLocation() - GetActorLocation()).GetSafeNormal();
FRotator Rot = UKismetMathLibrary::MakeRotFromX(Dir);
ArrowComp->SetWorldRotation(Rot);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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