CGAL 5.3  2D Arrangements

Operations  
Comparison_result  operator() (ArrTraits::X_monotone_curve_2 xc1, ArrTraits::X_monotone_curve_2 xc2, ArrTraits::Point_2 p) 
accepts two \( x\)monotone curves xc1 and xc2 that have a common right endpoint p , and returns SMALLER, EQUAL or LARGER according to the relative position of the two curves immediately to the left of \( p\). More...  
Comparison_result ArrTraits::CompareYAtXLeft_2::operator()  (  ArrTraits::X_monotone_curve_2  xc1, 
ArrTraits::X_monotone_curve_2  xc2,  
ArrTraits::Point_2  p  
) 
accepts two \( x\)monotone curves xc1
and xc2
that have a common right endpoint p
, and returns SMALLER, EQUAL
or LARGER
according to the relative position of the two curves immediately to the left of \( p\).
Note that in case one of the \( x\)monotone curves is a vertical segment (emanating downward from p
), it is always considered to be below the other curve.