Atsushi Sugiuchi develops tools in both CATIA Knowledge Pattern and XGen. When dealing with complex geometry, Morphosis often deals with geometrical operations that result in 3D splines. The tools provide a way to deconstruct these 3D splines into sets of 3D Bi-Arcs that retain the design intent while providing easy to built/construct geometry.

See Tutorial and Example here.​​​​​​​