UKismetMathLibrary::Vector_Distance2DSquared

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Returns the squared XY-plane distance between two 3D points without a square root. The fastest option for top-down 2D range comparisons.

Caveats & Gotchas

• Z is ignored entirely — same caveat as Vector_Distance2D. Combining this with 3D distance checks requires a separate call to Vector_DistanceSquared.
• Compare the result against a squared threshold (Radius * Radius), not the raw radius. This is easy to forget when porting a non-squared check.

Signature

static UE_INL_API double Vector_Distance2DSquared(FVector V1, FVector V2);

Parameters

Name	Type	Description	Default
V1	FVector	The first point.	—
V2	FVector	The second point.	—

Return Type

double

Example

Efficient top-down proximity check C++

double DistSq2D = UKismetMathLibrary::Vector_Distance2DSquared(
    GetActorLocation(),
    TargetActor->GetActorLocation());
if (DistSq2D <= Radius2D * Radius2D)
{
    OnEnterZone();
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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