API Reference > geometry-core > Numerics > SmallSystem > lineSegment3dClosestPointUnbounded lineSegment3dClosestPointUnbounded MethodStatic Return the line fraction at which the line is closest to a space point lineSegment3dClosestPointUnbounded(pointA0: Point3d, pointA1: Point3d, spacePoint: Point3d): undefined | number Parameter Type Description pointA0 Point3d start point pointA1 Point3d end point spacePoint Point3d homogeneous point in space Returns - undefined | number Defined in numerics/Polynomials.ts Line 1561 Last Updated: 11 June, 2024