UKismetMathLibrary::Quat_IsNonFinite

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Returns true if any component (X, Y, Z, or W) is NaN or Infinity. This is the logical negation of Quat_IsFinite.

Caveats & Gotchas

• This returns true for either NaN or Inf — it does not distinguish between them. If you need to differentiate, check components with FMath::IsNaN / FMath::IsInfinite individually.
• In Blueprint, use this (rather than the negation of IsFinite) when your logic branches on corruption, to avoid an extra Not node and potential readability confusion.

Signature

static UE_INL_API bool Quat_IsNonFinite(const FQuat& Q)

Parameters

Name	Type	Description	Default
Q	const FQuat&	The quaternion to test.	—

Return Type

bool

Example

Early-out on corrupt rotation data C++

FQuat IncomingRot = GetReplicatedRotation();
if (UKismetMathLibrary::Quat_IsNonFinite(IncomingRot))
{
    UE_LOG(LogTemp, Error, TEXT("Received non-finite quaternion over network"));
    return;
}
ApplyRotation(IncomingRot);

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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