API Reference > geometry-core > Bspline > BSplineCurve3dH > knotToPointAnd2Derivatives knotToPointAnd2Derivatives Method Evaluate at a position given by a knot value. Return point with 2 derivatives. knotToPointAnd2Derivatives(u: number, result?: Plane3dByOriginAndVectors): Plane3dByOriginAndVectors Parameter Type Description u number result Plane3dByOriginAndVectors Returns - Plane3dByOriginAndVectors Defined in core/geometry/src/bspline/BSplineCurve3dH.ts Line 188 Last Updated: 13 June, 2024