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.

See Also