CGAL users discussion list

[Flaminigo <>]

I use 
OutputIterator  
intersection (   Polygon_2<Kernel, Container> p1,
Polygon_2<Kernel, Container> p2,
OutputIterator oi)
to compute intersection of two polygons. How ever it reports errors when
computing the following two data:

        Point data [] = {
                        Point 
(0.0779032708430652393039039793621,0.122371377632631991860812092909
),
                        Point (13.2581684036192424258615574217, 
0.959769766188581341381791389722
),
                        Point (1.83288664437794701633777094685 
,0.617138373712451504538023527857
),
                        Point (0.693014198934081226965986388677 
,0.39778520059801764086060416048
),
                        Point (0.463650350407879274783340406429 
,0.340347544290135750610915010839
),
                        Point (0.0922023183796141926338307825972,
0.229473196453353733836877381691),
                        Point( 0.0727179173985912918887208888918
,0.195167801755973285837697517309)
        };

Polygon p2(data, data + 4);

Point points_b[] = { Point(0,0), Point(10,0), Point(10,20), Point(0,20)};
Polygon p1 (points_b, points_b+4);

std::ostringstream ostr(std::ostringstream::out);
std::ostream_iterator<Polygon_h> sit = ostr;
intersection(p1, p2, sit); 

My kernel is 
typedef CGAL::Cartesian<double> K;
typedef CGAL::Polygon_2<K>                                              
Polygon;
typedef CGAL::Polygon_with_holes_2<K>                                   
Polygon_h;

The error is
CGAL error: assertion violation!
Expr: *slIter == curve
File: /usr/include/CGAL/Basic_sweep_line_2.h
Line: 675
Explanation:
terminate called after throwing an instance of 'CGAL::Assertion_exception'
  what():  CGAL ERROR: assertion violation!
Expr: *slIter == curve
File: /usr/include/CGAL/Basic_sweep_line_2.h
Line: 675
Aborted



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