API Reference > geometry-core > CartesianGeometry > PolygonOps > unitNormal unitNormal MethodStatic Return a unit normal to the plane of the polygon. unitNormal(points: IndexedXYZCollection, result: Vector3d): boolean Parameter Type Description points IndexedXYZCollection array of points around the polygon. This is assumed to NOT have closure edge. result Vector3d caller-allocated result vector. Returns - boolean Defined in core/geometry/src/geometry3d/PolygonOps.ts Line 443 Last Updated: 13 June, 2024