API Reference > geometry-core > CartesianGeometry > EllipsoidPatch > uvFractionToPointAndTangents uvFractionToPointAndTangents Method Return the point and derivative vectors on the ellipsoid at fractional positions in the angular ranges. Derivatives are with respect to fractional position. uvFractionToPointAndTangents(longitudeFraction: number, latitudeFraction: number, result?: Plane3dByOriginAndVectors): Plane3dByOriginAndVectors Parameter Type Description longitudeFraction number latitudeFraction number result Plane3dByOriginAndVectors Returns - Plane3dByOriginAndVectors Defined in geometry3d/Ellipsoid.ts Line 803 Last Updated: 12 June, 2024