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): CurvePrimitive | undefined Parameter Type Description _fractionA number start fraction _fractionB number end fraction Returns - CurvePrimitive | undefined Defined in core/geometry/src/curve/CurvePrimitive.ts Line 370 Last Updated: 13 June, 2024