/HierarchicalSurface.java/1.1/Thu Mar  4 15:08:52 2010//
/ProgressiveSurface.java/1.1/Thu Mar  4 15:08:52 2010//
/SelfIntersectingPreventionProgressiveSurface.java/1.1/Thu Mar  4 15:08:52 2010//
/SphericalArc.java/1.1/Thu Mar  4 15:08:52 2010//
D
