API Reference > geometry-core > ArraysAndInterfaces > UVSurface UVSurface Interface Interface with methods for mapping (u,v) fractional coordinates to surface xyz and derivatives. Implemented by Cone EllipsoidPatch Sphere TorusPipe Methods Name Description uvFractionToPoint(uFraction: number, vFraction: number, result?: Point3d): Point3d Convert fractional u and v coordinates to surface point uvFractionToPointAndTangents(uFraction: number, vFraction: number, result?: Plane3dByOriginAndVectors): Plane3dByOriginAndVectors Convert fractional u and v coordinates to surface point and in-surface tangent directions. Defined in core/geometry/src/geometry3d/GeometryHandler.ts Line 320 Last Updated: 13 June, 2024