CGAL users discussion list

Hello,

CGAL symmetric difference seems to give wrong results on this input:

polygon 1: (axis aligned square)

0 0     
10 0    
10 10   
0 10

Polygon 2:  (45 degrees aligned square that touches the edges of polygon 1)

5 0     
10 5    
5 10    
0 5

The proper symmetric difference is four triangles, but the result given by 
the symmetric_difference() operation gives polygon 1 as the outer boundary, 
and polygon 2 as its inner holes, as if there is an "epsilon" difference 
between the vertices of polygon 2 and the edges of polygon 1. Am I doing it 
wrong, or is this intentional?

Thanks in advance,
Amir Vaxman.