#include <CGAL/Polygon_with_holes_2.h>

Inherits from

CGAL::General_polygon_with_holes_2< Polygon_ >.

Definition

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

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 polygon 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`.

Related Functions inherited from CGAL::General_polygon_with_holes_2< Polygon_ >
template<typename Polygon_ >
std::ostream &	operator<< (std::ostream &os, const General_polygon_with_holes_2< Polygon_ > &p)
	This operator exports a `General_polygon_with_holes_2` to the output stream `os`.

template<typename Polygon_ >
std::istream &	operator>> (std::istream &is, General_polygon_with_holes_2< Polygon_ > &p)
	This operator imports a `General_polygon_with_holes_2` 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 Container_ = std::vector<typename Kernel::Point_2>>

template<class HolesInputIterator >

CGAL::Polygon_with_holes_2< Kernel, Container_ >::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
	)

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
	)

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.