CGAL 5.5 - 2D Arrangements
CGAL::Arr_rational_function_traits_2< AlgebraicKernel_d_1 >::Curve_2 Class Reference

#include <CGAL/Arr_rational_function_traits_2.h>

## Definition

The Curve_2 class nested within the traits is used to represent rational functions which may be restricted to a certain x-range.

Is Model Of:
ArrTraits::Curve_2

## Types

typedef AlgebraicKernel_d_1::Polynomial_1 Polynomial_1

typedef AlgebraicKernel_d_1::Algebraic_real_1 Algebraic_real_1

## Operations

const Polynomial_1numerator () const
returns the numerator of the supporting rational function.

const Polynomial_1denominator () const
returns the denominator of the supporting rational function.

bool is_continuous () const
returns whether çurve is continuous, namely whether it does not contains any vertical asymptotes in its interior.

Arr_parameter_space left_parameter_space_in_x () const
returns whether the $$x$$-coordinate of çurve's left end is finite or whether it is $$\pm\infty$$.

Arr_parameter_space right_parameter_space_in_x () const
returns whether the $$x$$-coordinate of çurve's right end is finite or whether it is $$\pm\infty$$.

Algebraic_real_1 left_x () const
returns the $$x$$-coordinate of the left end. More...

Algebraic_real_1 right_x () const
returns the $$x$$-coordinate of the right end. More...

## ◆ left_x()

template<typename AlgebraicKernel_d_1 >
 Algebraic_real_1 CGAL::Arr_rational_function_traits_2< AlgebraicKernel_d_1 >::Curve_2::left_x ( ) const

returns the $$x$$-coordinate of the left end.

Precondition
left_boundary_in_x()==ARR_INTERIOR

## ◆ right_x()

template<typename AlgebraicKernel_d_1 >
 Algebraic_real_1 CGAL::Arr_rational_function_traits_2< AlgebraicKernel_d_1 >::Curve_2::right_x ( ) const

returns the $$x$$-coordinate of the right end.

Precondition
right_boundary_in_x()==ARR_INTERIOR