FVector::RotateAngleAxis

function Core Since unknown

#include "Math/Vector.h"

Access: public Specifiers: const

Description

Returns this vector rotated around the given axis by AngleDeg degrees, using Rodrigues' rotation formula. Does not modify the original vector.

Signature

TVector<T> RotateAngleAxis(const T AngleDeg, const TVector<T>& Axis) const

Parameters

Name	Type	Description	Default
AngleDeg	float	Angle to rotate by, in degrees.	—
Axis	const FVector&	The axis to rotate around. Should be a unit vector.	—

Return Type

FVector

Caveats & Gotchas

• Angle is in degrees, not radians — consistent with FRotator but opposite to FMath::Sin/Cos. Easy to mix up when computing Axis from trig functions.
• Axis should be normalised. Passing a non-unit axis produces a scaled result, not a pure rotation.
• Internally converts degrees to radians via FMath::DegreesToRadians. Use RotateAngleAxisRad for the raw-radians variant if calling in a tight loop.

Example

Orbit a point around an axis C++

// Rotate the forward vector 45 degrees around the world up axis
FVector RotatedDir = GetActorForwardVector().RotateAngleAxis(45.0f, FVector::UpVector);

// Spin a spawn offset around the actor's up vector each frame
SpawnOffset = SpawnOffset.RotateAngleAxis(RotationSpeed * DeltaTime, GetActorUpVector());

Version History

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

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