API Reference > geometry-core > Curve > LineString3d > packedSurfaceNormals packedSurfaceNormals AccessorReadOnly Return the (optional) array of surface normals. These Are only present during certain constructions such as faceting. packedSurfaceNormals: undefined | GrowableXYZArray Returns - undefined | GrowableXYZArray Defined in curve/LineString3d.ts Line 121 Last Updated: 11 June, 2024