【转帖】using Isplanar 90
 

using isplanar ()
using isplanar ()
can the member function isplanar () of an oddbarc, for instance, be used to determine if the arc is 2d or 3d? if not, then how can you determine if the arc is 2d or 3d?
oddbarc is always planar but it may reside in plane other than xy. normal() method returns the normal to arc's plane.
sergey slezkin
what about an oddbline?
it's planar too :-)
but may be not in xy plane too.
sergey slezkin