UKismetMathLibrary::MakeRotFromZY

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Builds a rotator with Z fixed as the up axis and Y adjusted for orthogonality, computing X as the cross product. Use when the surface normal and a lateral direction are both meaningful.

Caveats & Gotchas

• Z is preserved; Y may shift to enforce orthogonality. If the lateral direction matters more, swap to MakeRotFromYZ.
• Parallel Z and Y inputs silently produce a degenerate rotator.

Signature

static UE_INL_API FRotator MakeRotFromZY(const FVector& Z, const FVector& Y);

Parameters

Name	Type	Description	Default
Z	const FVector&	Primary (fixed) up axis.	—
Y	const FVector&	Secondary right axis, adjusted for orthogonality.	—

Return Type

FRotator

Example

Align an object to a slope with a lateral axis hint C++

FVector GroundNormal = FloorHit.ImpactNormal;
FVector LateralHint = FVector(0.f, 1.f, 0.f);
FRotator Rot = UKismetMathLibrary::MakeRotFromZY(GroundNormal, LateralHint);
MeshComp->SetWorldRotation(Rot);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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