UKismetMathLibrary::Quat_SetFromEuler

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintCallable

Description

Converts Euler angles (degrees) into a quaternion and stores the result in Q in-place. Equivalent to Quat_MakeFromEuler but modifies an existing quaternion rather than returning a new one.

Caveats & Gotchas

• Euler angles are interpreted as Roll (X), Pitch (Y), Yaw (Z) and applied in Yaw → Pitch → Roll order, matching UE's FRotator convention. If your source data uses a different order, results will be wrong.
• Prefer Quat_MakeFromEuler in expression contexts — the in-place version exists mainly for Blueprint graphs where the ref node wiring is more convenient.

Signature

static UE_INL_API void Quat_SetFromEuler(UPARAM(ref) FQuat& Q, const FVector& Euler);

Parameters

Name	Type	Description	Default
Q	FQuat&	The quaternion to overwrite in-place.	—
Euler	const FVector&	Euler angles in degrees: X=Roll, Y=Pitch, Z=Yaw.	—

Return Type

void

Example

Re-use an existing quaternion variable with new Euler values C++

FQuat Orientation;
FVector EulerAngles(0.f, 45.f, 90.f); // Roll=0, Pitch=45, Yaw=90
UKismetMathLibrary::Quat_SetFromEuler(Orientation, EulerAngles);
SetActorRotation(Orientation.Rotator());

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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