API Reference > geometry-core > Bspline > BSplineSurface3d > fractionToPoint fractionToPoint Method Evaluate at a position given by fractional coordinate in each direction. fractionToPoint(fractionU: number, fractionV: number): Point3d Parameter Type Description fractionU number u coordinate, as a fraction of the knot range. fractionV number v coordinate, as a fraction of the knot range. Returns - Point3d Return the xyz coordinates on the surface. Defined in bspline/BSplineSurface.ts Line 706 Last Updated: 12 June, 2024