API Reference > geometry-core > Curve > CurvePrimitive > clonePartialCurve clonePartialCurve Method Return (if possible) a curve primitive which is a portion of this curve. clonePartialCurve(_fractionA: number, _fractionB: number): undefined | CurvePrimitive Parameter Type Description _fractionA number start fraction _fractionB number end fraction Returns - undefined | CurvePrimitive Defined in curve/CurvePrimitive.ts Line 401 Last Updated: 29 November, 2022