UKismetMathLibrary::Distance2D

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Returns the Euclidean distance between two 2D points. Involves a square root — use DistanceSquared2D for distance comparisons to avoid the sqrt cost.

Caveats & Gotchas

• This calls FMath::Sqrt internally. For range checks (is A closer than X?), compare DistanceSquared2D against X*X to avoid the square root entirely.
• Not to be confused with Vector_Distance2D, which takes two FVector (3D) inputs and computes distance in the XY plane only, ignoring Z.

Signature

static UE_INL_API double Distance2D(FVector2D V1, FVector2D V2);

Parameters

Name	Type	Description	Default
V1	FVector2D	The first 2D point.	—
V2	FVector2D	The second 2D point.	—

Return Type

double

Example

Check if a UI element is near the cursor C++

FVector2D CursorPos(400.f, 300.f);
FVector2D ElementPos(410.f, 295.f);
double Dist = UKismetMathLibrary::Distance2D(CursorPos, ElementPos);
if (Dist < HoverRadius)
{
    HighlightElement();
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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