API Reference > geometry-core > CartesianGeometry > Ellipsoid > createPlaneSection createPlaneSection Method Construct an arc for the section cut of a plane with the ellipsoid. this is undefined if the plane does not intersect the ellipsoid. createPlaneSection(plane: Plane3dByOriginAndUnitNormal): Arc3d | undefined Parameter Type Description plane Plane3dByOriginAndUnitNormal Returns - Arc3d | undefined Defined in core/geometry/src/geometry3d/Ellipsoid.ts Line 405 Last Updated: 13 June, 2024