\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.4 - Geometric Object Generators
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CGAL::Points_on_segment_2< Point_2 > Class Template Reference

#include <CGAL/point_generators_2.h>

Definition

The class Points_on_segment_2 is a generator for points on a segment whose endpoints are specified upon construction.

The points are equally spaced.

Is Model Of:
PointGenerator
See Also
CGAL::cpp11::copy_n()
CGAL::Counting_iterator
CGAL::points_on_segment<Point_2>
CGAL::Random_points_in_disc_2<Point_2, Creator>
CGAL::Random_points_in_square_2<Point_2, Creator>
CGAL::Random_points_on_circle_2<Point_2, Creator>
CGAL::Random_points_on_segment_2<Point_2, Creator>
CGAL::Random_points_on_square_2<Point_2, Creator>
CGAL::random_selection()
std::random_shuffle
Examples:
Generator/random_segments2.cpp.

Types

typedef std::input_iterator_tag iterator_category
 
typedef Point_2 value_type
 
typedef std::ptrdiff_t difference_type
 
typedef const Point_2 * pointer
 
typedef const Point_2 & reference
 
 Points_on_segment_2 (const Point_2 &p, const Point_2 &q, std::size_t n, std::size_t i=0)
 creates an input iterator g generating points of type P equally spaced on the segment from \( p\) to \( q\). More...
 

Operations

double range ()
 returns the range in which the point coordinates lie, i.e. \( \forall x: |x| \leq\) range() and \( \forall y: |y| \leq\)range()
 
const Point_2 & source ()
 returns the source point of the segment.
 
const Point_2 & target ()
 returns the target point of the segment.
 

Constructor & Destructor Documentation

template<typename Point_2 >
CGAL::Points_on_segment_2< Point_2 >::Points_on_segment_2 ( const Point_2 &  p,
const Point_2 &  q,
std::size_t  n,
std::size_t  i = 0 
)

creates an input iterator g generating points of type P equally spaced on the segment from \( p\) to \( q\).

\( n-i\) points are placed on the segment defined by \( p\) and \( q\). Values of the index parameter \( i\) larger than 0 indicate starting points for the sequence further from \( p\). Point \( p\) has index value 0 and \( q\) has index value \( n-1\).

Requires:
The expressions to_double(p.x()) and to_double(p.y()) must result in the respective double representation of the coordinates of \( p\), and similarly for \( q\).