UKismetMathLibrary::Quat_FindBetweenVectors

function Engine Blueprint Since 4.15

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Generates the shortest quaternion rotation that takes the Start vector to the End vector. Vectors can be any length — they are normalized internally.

Caveats & Gotchas

• If Start and End are exactly opposite (antiparallel), the function returns an arbitrary perpendicular rotation; the result is valid but not deterministic. Use Quat_FindBetweenNormals with pre-normalized inputs if this edge case matters.
• Unlike Quat_FindBetweenNormals, this variant normalizes both inputs internally, adding two sqrt operations. Prefer Quat_FindBetweenNormals when the inputs are already unit vectors.

Signature

static UE_INL_API FQuat Quat_FindBetweenVectors(FVector Start, FVector End);

Parameters

Name	Type	Description	Default
Start	FVector	The vector the rotation starts from (any length).	—
End	FVector	The vector the rotation ends at (any length).	—

Return Type

FQuat

Example

Orient a projectile toward a target point C++

FVector ToTarget = (TargetLocation - GetActorLocation());
FVector Forward = GetActorForwardVector();
FQuat NeededRot = UKismetMathLibrary::Quat_FindBetweenVectors(Forward, ToTarget);
FQuat NewQuat = NeededRot * GetActorQuat();
SetActorRotation(NewQuat.Rotator());

Version History

Introduced in: 4.15

Version	Status	Notes
5.6	stable	—

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