CGAL::compare_x

Comparison_result compare_x ( Point_2<Kernel> p, Point_2<Kernel> q)
compares the x-coordinates of p and q.

Comparison_result compare_x ( Point_3<Kernel> p, Point_3<Kernel> q)
compares the x-coordinates of p and q.

Comparison_result
compare_x ( Point_2<Kernel> p,
Line_2<Kernel> l1,
Line_2<Kernel> l2)
compares the x-coordinates of p and the intersection of lines l1 and l2, see (a) in the figure below.

Comparison_result
compare_x ( Line_2<Kernel> l,
Line_2<Kernel> h1,
Line_2<Kernel> h2)
compares the x-coordinates of the intersection of line l with line h1 and with line h2, see (b) in the figure below.

Comparison_result
compare_x ( Line_2<Kernel> l1,
Line_2<Kernel> l2,
Line_2<Kernel> h1,
Line_2<Kernel> h2)
compares the x-coordinates of the intersection of lines l1 and l2 and the intersection of lines h1 and h2, see (c) in the figure below.

Comparison of the x 
or y coordinates of the (implicitly given) points in the boxes

See Also

CGAL::compare_xy
CGAL::compare_xyz
CGAL::compare_x_at_y
CGAL::compare_y
CGAL::compare_yx
CGAL::compare_y_at_x
CGAL::compare_z