API Reference > geometry-core > CartesianGeometry > Vector3d > unitPerpendicularXY unitPerpendicularXY Method Return a vector which is in the xy plane, perpendicular ot the xy part of this vector, and of unit length. If the xy part is 00, the return is the rotated (but not normalized) xy parts of this vector. unitPerpendicularXY(result?: Vector3d): Vector3d Parameter Type Description result Vector3d optional preallocated result. Returns - Vector3d Defined in geometry3d/Point3dVector3d.ts Line 842 Last Updated: 12 June, 2024