UKismetMathLibrary::EqualEqual_TransformTransform

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Returns true if two transforms are exactly equal, comparing each component with strict floating-point equality. Use only when transforms originate from identical data sources with no arithmetic.

Caveats & Gotchas

• Strict float equality is almost never the right check after any math operations — floating-point rounding will cause two transforms that should be equal to return false. Prefer NearlyEqual_TransformTransform with an appropriate tolerance for all practical uses.
• Internally calls FTransform::Equals with zero tolerance, which compares the quaternion, translation, and scale3D fields individually. Two representations of the same orientation stored as different quaternions (e.g., q and -q) will not be equal.

Signature

static UE_INL_API bool EqualEqual_TransformTransform(const FTransform& A, const FTransform& B)

Parameters

Name	Type	Description	Default
A	const FTransform&	First transform to compare.	—
B	const FTransform&	Second transform to compare.	—

Return Type

bool

Example

Assert a cached transform was not modified C++

// Only reliable when both sides come from the exact same stored data
checkf(UKismetMathLibrary::EqualEqual_TransformTransform(CachedTM, InitialTM),
    TEXT("Transform was unexpectedly mutated"));

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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