CGAL users discussion list

[Bernd Gaertner <>]

Kim wrote:
> Hi
> sorry ! this is a repost ,,,  but I am really stopped.
>
> noone has any idear at all ? any clue is appreciated!
> I am sure the start and endpoint are the same ,, since if I input the
> same , just as linesegment then it works perfect.
>
> Why is the polygon below failing when
> trying to
> if (pgn.orientation()==CGAL::CLOCKWISE )   <-- fails with error , see below
> Precondition violation.

What kernel are you using? Please read the following FAQ item to see 
whether it is related to your problem: 
http://www.cgal.org/FAQ.html#inexact_NT.

Best,
Bernd.