CGAL 5.5.2 - 2D Arrangements
ArrangementHorizontalSideTraits_2 Concept Reference

## Definition

ArrangementHorizontalSideTraits_2 is an abstract concept. It generalizes all concepts that handle curves that either reach or approach either the bottom or top sizeds of the boundary of the parameter space. (An "abstract" concept is a concept that is useless on its own.) Only a combination of this concept and one or more concepts that handle curves that either reach or approach the remaining boundary sides (that is, left and right) are purposeful, and can have models.

Refines:
ArrangementBasicTraits_2
Has Models:

CGAL::Arr_linear_traits_2<Kernel>

CGAL::Arr_rational_function_traits_2<AlgebraicKernel_d_1>

CGAL::Arr_algebraic_segment_traits_2<Coefficient>

CGAL::Arr_geodesic_arc_on_sphere_traits_2<Kernel, X, Y>

ArrangementVerticalSideTraits_2

## Functor Types

typedef unspecified_type Parameter_space_in_y_2
models the concept ArrTraits::ParameterSpaceInY_2.

typedef unspecified_type Compare_x_on_boundary_2
models the concept ArrTraits::CompareXOnBoundaryOfCurveEnd_2.

typedef unspecified_type Compare_x_near_boundary_2
models the concept ArrTraits::CompareXNearBoundary_2.

## Accessing Functor Objects

Parameter_space_in_y_2 parameter_space_in_y_2_object () const

Compare_x_on_boundary_2 compare_x_on_boundary_2_object () const

Compare_x_near_boundary_2 compare_x_near_boundary_2_object () const