CGAL 5.1 - 2D and 3D Linear Geometry Kernel
CGAL::compare_x() (2D/3D Linear Kernel)

## Functions

template<typename Kernel >
Comparison_result CGAL::compare_x (const CGAL::Point_2< Kernel > &p, const CGAL::Point_2< Kernel > &q)
compares the $$x$$-coordinates of p and q.

template<typename Kernel >
Comparison_result CGAL::compare_x (const CGAL::Point_3< Kernel > &p, const CGAL::Point_3< Kernel > &q)
compares the $$x$$-coordinates of p and q.

template<typename Kernel >
Comparison_result CGAL::compare_x (const CGAL::Point_2< Kernel > &p, const CGAL::Line_2< Kernel > &l1, const CGAL::Line_2< Kernel > &l2)
compares the $$x$$-coordinates of p and the intersection of lines l1 and l2. More...

template<typename Kernel >
Comparison_result CGAL::compare_x (const CGAL::Line_2< Kernel > &l, const CGAL::Line_2< Kernel > &h1, const CGAL::Line_2< Kernel > &h2)
compares the $$x$$-coordinates of the intersection of line l with line h1 and with line h2. More...

template<typename Kernel >
Comparison_result CGAL::compare_x (const CGAL::Line_2< Kernel > &l1, const CGAL::Line_2< Kernel > &l2, const CGAL::Line_2< Kernel > &h1, const CGAL::Line_2< Kernel > &h2)
compares the $$x$$-coordinates of the intersection of lines l1 and l2 and the intersection of lines h1 and h2. More...

## ◆ compare_x() [1/3]

template<typename Kernel >
 Comparison_result CGAL::compare_x ( const CGAL::Point_2< Kernel > & p, const CGAL::Line_2< Kernel > & l1, const CGAL::Line_2< Kernel > & l2 )

#include <CGAL/Kernel/global_functions.h>

compares the $$x$$-coordinates of p and the intersection of lines l1 and l2.

See Figure figcompare_x (a).

## ◆ compare_x() [2/3]

template<typename Kernel >
 Comparison_result CGAL::compare_x ( const CGAL::Line_2< Kernel > & l, const CGAL::Line_2< Kernel > & h1, const CGAL::Line_2< Kernel > & h2 )

#include <CGAL/Kernel/global_functions.h>

compares the $$x$$-coordinates of the intersection of line l with line h1 and with line h2.

See Figure figcompare_x (b).

## ◆ compare_x() [3/3]

template<typename Kernel >
 Comparison_result CGAL::compare_x ( const CGAL::Line_2< Kernel > & l1, const CGAL::Line_2< Kernel > & l2, const CGAL::Line_2< Kernel > & h1, const CGAL::Line_2< Kernel > & h2 )

#include <CGAL/Kernel/global_functions.h>

compares the $$x$$-coordinates of the intersection of lines l1 and l2 and the intersection of lines h1 and h2.

See Figure figcompare_x (c).