API Reference > geometry-core > CartesianGeometry > EllipsoidPatch > anglesToUnitNormalRay anglesToUnitNormalRay Method Compute point (with altitude) at given angles and altitude. Never fails for non-singular ellipsoid. In the returned ray, ray.origin is the point at requested altitude. ray.direction is an outward-directed unit vector anglesToUnitNormalRay(position: LongitudeLatitudeNumber, result?: Ray3d): Ray3d | undefined Parameter Type Description position LongitudeLatitudeNumber longitude, latitude, and height result Ray3d Returns - Ray3d | undefined Defined in core/geometry/src/geometry3d/Ellipsoid.ts Line 870 Last Updated: 13 June, 2024