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): number | undefined Parameter Type Description pointA0 Point3d start point pointA1 Point3d end point spacePoint Point3d homogeneous point in space Returns - number | undefined Defined in core/geometry/src/numerics/Polynomials.ts Line 1513 Last Updated: 13 June, 2024