UKismetMathLibrary::Vector_IsUniform

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Returns true if all three components of the vector are equal within the specified tolerance. Typically used to verify uniform scale vectors.

Caveats & Gotchas

• Checks that all components are equal to each other, not that they equal any particular value — (5, 5, 5) is uniform, (0, 0, 0) is also uniform. Do not use this to check for unit scale (1,1,1); compare against FVector::OneVector instead.
• The tolerance is an absolute per-pair difference, not relative. For large scale values (e.g., (1000, 1001, 1000)), the default 1e-4 tolerance would report non-uniform, even though the relative difference is tiny.

Signature

static UE_INL_API bool Vector_IsUniform(const FVector& A, float Tolerance = 1.e-4f);

Parameters

Name	Type	Description	Default
A	FVector	The vector to test.	—
Tolerance	float	Maximum allowed absolute difference between any two components. Defaults to 1e-4.	1.e-4f

Return Type

bool

Example

Warn when non-uniform scale is applied to a mesh C++

FVector Scale = StaticMesh->GetComponentScale();
if (!UKismetMathLibrary::Vector_IsUniform(Scale, 0.01f))
{
    UE_LOG(LogTemp, Warning, TEXT("Non-uniform scale on %s may cause physics issues"),
        *StaticMesh->GetName());
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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