FVector

struct Core Blueprint Since 1.0

#include "Math/Vector.h"

Access: public Specifiers: USTRUCT

Description

A 3D vector with double-precision (UE 5.0+) X, Y, Z components. Used ubiquitously for positions, directions, velocities, and scales throughout the engine. FVector is a value type — it can be stored on the stack and passed by value.

Signature

struct FVector

Caveats & Gotchas

• As of UE 5.0, FVector uses double precision (FVector = TVector<double>). Use FVector3f (float) explicitly if you need single-precision for performance-sensitive GPU data.
• FVector does NOT represent a direction unless explicitly normalized. Call `GetSafeNormal()` before using as a direction.
• FVector::ZeroVector is a global constant for (0, 0, 0). Prefer it over constructing a zero vector manually.
• Equality comparison with == is exact floating-point — use `Equals(Other, Tolerance)` for approximate checks.

Example

Common FVector operations C++

FVector A(100.f, 0.f, 0.f);
FVector B(0.f, 100.f, 0.f);

// Distance
float Dist = FVector::Dist(A, B);  // 141.4...

// Direction from A to B
FVector Dir = (B - A).GetSafeNormal();

// Dot and cross products
float Dot = FVector::DotProduct(A, B);   // 0
FVector Cross = FVector::CrossProduct(A, B); // (0, 0, 10000)

// Lerp
FVector Mid = FMath::Lerp(A, B, 0.5f);  // (50, 50, 0)

Functions (7)

Utility 1 Math 6

Utility

1 ▼

Access	Type	Name	Description
public	function	FVector::GetSafeNormal	Returns a normalised copy of the vector, or ResultIfZero if the vector is too short to safely normalise.

Math

6 ▼

Access	Type	Name	Description
public	function	FVector::CrossProduct	Returns the cross product of two vectors.
public	function	FVector::Distance	Returns the Euclidean distance between two vectors.
public	function	FVector::DotProduct	Computes the dot product of two vectors: `A.
public	function	FVector::IsNearlyZero	Returns true if all three components are within Tolerance of zero.
public	function	FVector::IsZero	Returns true if all three components are exactly zero.
public	function	FVector::RotateAngleAxis	Returns this vector rotated around the given axis by AngleDeg degrees, using Rodrigues' rotation formula.

Members

prop X prop Y prop Z prop ZeroVector prop OneVector prop ForwardVector prop UpVector prop RightVector

Version History

Introduced in: 1.0

Version	Status	Notes
5.6	stable	—
5.0	stable	Changed from float to double precision (TVector<double>).
4.27	stable	Single-precision float.

Feedback

Was this helpful?