ArrangementLandmarkTraits_2

Definition

The landmark-traits concept refines the basic traits concept by adding operations needed for the landmarks point-location strategy, namely - approximating points and connecting points with a simple $$x-monotone curve.

A model of this concept must define the Approximate_number_type, which is used to approximate the coordinates of Point_2 instances. It is recommended to define the approximated number type as the built-in double type.

Refines

Types

ArrangementLandmarkTraits_2::Approximate_number_type
	the number type used to approximate point coordinates.

Functor Types

ArrangementLandmarkTraits_2::Approximate_2
	provides the operator : Approximate_number_type operator() (Point_2 p, int i) which returns an approximation of p's $$x-coordinate (if i == 0), or of p's $$y-coordinate (if i == 1).
ArrangementLandmarkTraits_2::Construct_x_monotone_curve_2
	provides the operator : X_monotone_curve_2 operator() (Point_2 p1, Point_2 p2) returns an $$x-monotone curve connecting p1 and p2 (i.e., the two input points are its endpoints).

Creation

ArrangementLandmarkTraits_2 traits;
	default constructor.
ArrangementLandmarkTraits_2 traits ( other);
	copy constructor.

ArrangementLandmarkTraits_2
	traits = other	assignment operator.

Accessing Functor Objects

Approximate_2	traits.approximate_2_object ()
Construct_x_monotone_curve_2
	traits.construct_x_monotone_curve_2_object ()

Has Models

CGAL::Arr_non_caching_segment_basic_traits_2<Kernel>
CGAL::Arr_segment_traits_2<Kernel>
CGAL::Arr_polyline_traits_2<SegmentTraits>
CGAL::Arr_conic_traits_2<RatKernel,AlgKernel,NtTraits>

See Also

ArrangementBasicTraits_2