CGAL 5.4 - 2D Arrangements
CGAL::Arr_contracted_side_tag Struct Reference

#include <CGAL/Arr_tags.h>


This type tag is used to indicate that a side of the parameter space, either left, right, bottom, or top, is contracted, and curves that approach this side might be inserted into the arrangement.

More precisely, when this condition occurs at the left, right, bottom, or top side, then the corresponding categories, namely, Left_side_category, Right_side_category, Bottom_side_category, and Top_side_category, nested in every geometry traits class, must be convertible to the type Arr_contracted_side_tag. For example, the Bottom_side_category and Top_side_category category types, nested in every model of the ArrangementSphericalBoundaryTraits_2 concept (such as any instance of the Arr_geodesic_arc_on_sphere_traits_2 class template) must be convertible to Arr_contracted_side_tag

Arr_oblivious_side_tag is an empty construct used for dispatching functions based on type of curves that induce the arrangement.

See also