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): undefined | Arc3d Parameter Type Description eyePoint Point4d Returns - undefined | Arc3d Defined in geometry3d/Ellipsoid.ts Line 251 Last Updated: 11 June, 2024