API Reference > geometry-core > Curve > Arc3d > closestPoint closestPoint Method Return details of the closest point on the arc, optionally extending to full ellipse. closestPoint(spacePoint: Point3d, extend: VariantCurveExtendParameter, result?: CurveLocationDetail): CurveLocationDetail Parameter Type Description spacePoint Point3d search for point closest to this point. extend VariantCurveExtendParameter if true, consider projections to the complete ellipse. If false, consider only endpoints and projections within the arc sweep. result CurveLocationDetail optional preallocated result. Returns - CurveLocationDetail Defined in core/geometry/src/curve/Arc3d.ts Line 524 Last Updated: 13 June, 2024