CGAL 5.3 - 2D Arrangements

#define CGAL_ALWAYS_LEFT_TO_RIGHT
 If the macro is set to one, then \(x\)-monotone curves are always directed from left-to-right.
 
#define CGAL_ALWAYS_LEFT_TO_RIGHT
 If the macro is set to one, then \(x\)-monotone curves are always directed from left-to-right.