API Reference > geometry-core > CartesianGeometry > Ellipsoid > silhouetteArc silhouetteArc Method Find the silhouette of the ellipsoid as viewed from a homogeneous eyepoint. Returns undefined if the eyepoint is inside the ellipsoid silhouetteArc(eyePoint: Point4d): Arc3d | undefined Parameter Type Description eyePoint Point4d Returns - Arc3d | undefined Defined in core/geometry/src/geometry3d/Ellipsoid.ts Line 253 Last Updated: 13 June, 2024