API Reference > geometry-core > Bspline > BSplineCurve3dBase > fractionToPointAnd2Derivatives fractionToPointAnd2Derivatives Method Construct a plane with origin at the fractional position along the arc x axis is the first derivative, i.e. tangent along the curve y axis is the second derivative fractionToPointAnd2Derivatives(fraction: number, result?: Plane3dByOriginAndVectors): Plane3dByOriginAndVectors Parameter Type Description fraction number result Plane3dByOriginAndVectors Returns - Plane3dByOriginAndVectors Defined in core/geometry/src/bspline/BSplineCurve.ts Line 143 Last Updated: 13 June, 2024