API Reference > geometry-core > Numerics > SmallSystem > lineSegment3dXYClosestPointUnbounded lineSegment3dXYClosestPointUnbounded MethodStatic Return the line fraction at which the line is closest to a space point as viewed in xy only. lineSegment3dXYClosestPointUnbounded(pointA0: Readonly<WritableXAndY>, pointA1: Readonly<WritableXAndY>, spacePoint: Readonly<WritableXAndY>): undefined | number Parameter Type Description pointA0 Readonly<WritableXAndY> start point pointA1 Readonly<WritableXAndY> end point spacePoint Readonly<WritableXAndY> homogeneous point in space Returns - undefined | number Defined in numerics/Polynomials.ts Line 1544 Last Updated: 11 June, 2024