UKismetMathLibrary::Vector_IsNormal

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Returns true if the vector is normalized (unit length). Uses a tolerance of 1.e-4 on the squared length, so vectors very close to unit length also return true.

Caveats & Gotchas

• The check is done on the squared length, so the actual tolerance on length is the square root of 1.e-4 (~0.01). A vector with length 0.99 or 1.01 will still pass.
• This function does NOT normalize the vector — it only queries whether it already is. Call Normal() or Vector_Normalize() first if you need to ensure it's unit length before using it as a direction.

Signature

static UE_INL_API bool Vector_IsNormal(const FVector& A);

Parameters

Name	Type	Description	Default
A	const FVector&	The vector to test.	—

Return Type

bool

Example

Guard normalization before use C++

FVector Dir = SomeInput.GetSafeNormal();
if (UKismetMathLibrary::Vector_IsNormal(Dir))
{
    // safe to use as direction
    MoveActor(Dir * Speed);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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