API Reference > geometry-core > Curve > LineString3d > clonePartialCurve clonePartialCurve Method Return (if possible) a LineString which is a portion of this curve. This implementation does NOT extrapolate the linestring -- fractions are capped at 0 and 1. clonePartialCurve(fractionA: number, fractionB: number): CurvePrimitive | undefined Parameter Type Description fractionA number start fraction fractionB number end fraction Returns - CurvePrimitive | undefined Defined in core/geometry/src/curve/LineString3d.ts Line 1162 Last Updated: 13 June, 2024