CGAL 6.0  2D Arrangements

Functor
Operations  
A model of this concept must provide:  
bool  operator() (ArrTraits::X_monotone_curve_2 xc1, ArrTraits::X_monotone_curve_2 xc2) 
accepts two \(x\)monotone curves xc1 and xc2 and determines whether they can be merged to form a single \(x\)monotone curve.  
bool ArrTraits::AreMergeable_2::operator()  (  ArrTraits::X_monotone_curve_2  xc1, 
ArrTraits::X_monotone_curve_2  xc2  
) 
accepts two \(x\)monotone curves xc1
and xc2
and determines whether they can be merged to form a single \(x\)monotone curve.
xc1
and xc2
are mergeable if their underlying curves are identical, they share a common endpoint, and they do not bend to form a non \(x\)monotone curve.