CGAL 6.0 - 2D Polygons
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CGAL::Polygon_with_holes_2< Kernel, Containter > Class Template Reference

#include <CGAL/Polygon_with_holes_2.h>

Inherits from

CGAL::General_polygon_with_holes_2< Polygon_ >.

Definition

template<class Kernel, class Containter = std::vector<typename Kernel::Point_2>>
class CGAL::Polygon_with_holes_2< Kernel, Containter >

The class Polygon_with_holes_2 models the concept GeneralPolygonWithHoles_2.

It represents a linear polygon with holes. It is parameterized with two types (Kernel and Container) that are used to instantiate the type Polygon_2<Kernel,Container>. This poygon type is used to represent the outer boundary and the boundary of the holes (if any exist).

Is model of
GeneralPolygonWithHoles_2
Examples
Polygon/draw_polygon_with_holes.cpp, Polygon/multipolygon.cpp, and Stream_support/Polygon_WKT.cpp.

Public Member Functions

 Polygon_with_holes_2 ()=default
 Default constructor.
 
 Polygon_with_holes_2 (const Base &base)
 Constructor from the base class.
 
 Polygon_with_holes_2 (const Polygon_2 &pgn_boundary)
 Constructor from a polygon.
 
 Polygon_with_holes_2 (Polygon_2 &&pgn_boundary)
 Cconstructor moving a polygon.
 
template<class HolesInputIterator >
 Polygon_with_holes_2 (const Polygon_2 &pgn_boundary, HolesInputIterator h_begin, HolesInputIterator h_end)
 Constructor from a polygon (outer boundary) and hole polygons.
 
template<class HolesInputIterator >
 Polygon_with_holes_2 (Polygon_2 &&pgn_boundary, HolesInputIterator h_begin, HolesInputIterator h_end)
 Cconstructor moving a polygon.
 
Bbox_2 bbox () const
 returns the bounding box of the polygon with holes
 

Related Functions

(Note that these are not member functions.)

template<class Kernel_ , class Container_ >
std::ostream & operator<< (std::ostream &os, const Polygon_with_holes_2< Kernel_, Container_ > &p)
 This operator exports a polygon with holes to the output stream os.
 
template<class Kernel_ , class Container_ >
std::istream & operator>> (std::istream &is, Polygon_with_holes_2< Kernel_, Container_ > &p)
 This operator imports a polygon with holes from the input stream is.
 

Additional Inherited Members

- Public Types inherited from CGAL::General_polygon_with_holes_2< Polygon_ >
typedef Polygon_ Polygon_2
 polygon without hole type
 

Constructor & Destructor Documentation

◆ Polygon_with_holes_2()

template<class Kernel , class Containter = std::vector<typename Kernel::Point_2>>
template<class HolesInputIterator >
CGAL::Polygon_with_holes_2< Kernel, Containter >::Polygon_with_holes_2 ( Polygon_2 &&  pgn_boundary,
HolesInputIterator  h_begin,
HolesInputIterator  h_end 
)

Cconstructor moving a polygon.

Note
In order to move the hole polygons a std::move_iterator may be used.

Friends And Related Function Documentation

◆ operator<<()

template<class Kernel_ , class Container_ >
std::ostream & operator<< ( std::ostream &  os,
const Polygon_with_holes_2< Kernel_, Container_ > &  p 
)
related

This operator exports a polygon with holes to the output stream os.

An ASCII and a binary format exist. The format can be selected with the CGAL modifiers for streams, set_ascii_mode() and set_binary_mode(), respectively. The modifier set_pretty_mode() can be used to allow for (a few) structuring comments in the output. Otherwise, the output would be free of comments. The default for writing is ASCII without comments.

The number of points of the outer boundary is exported followed by the points themselves in counterclockwise order. Then, the number of holes is exported, and for each hole, the number of points on its outer boundary is exported followed by the points themselves in clockwise order.

◆ operator>>()

template<class Kernel_ , class Container_ >
std::istream & operator>> ( std::istream &  is,
Polygon_with_holes_2< Kernel_, Container_ > &  p 
)
related

This operator imports a polygon with holes from the input stream is.

Both ASCII and binary formats are supported, and the format is automatically detected.

The format consists of the number of points of the outer boundary followed by the points themselves in counterclockwise order, followed by the number of holes, and for each hole, the number of points of the outer boundary is followed by the points themselves, in clockwise order.