CGAL 5.6.1  2D Regularized Boolean SetOperations

#include <CGAL/General_polygon_2.h>
The class General_polygon_2
models the concept GeneralPolygon_2
.
It represents a simple generalpolygon. It is parameterized with the type ArrTraits
that models the concept ArrangementDirectionalXMonotoneTraits_2
. The latter is a refinement of the concept ArrangementXMonotoneTraits_2
. In addition to the requirements of the concept ArrangementXMonotoneTraits_2
, a model of the concept ArrangementDirectionalXMonotoneTraits_2
must support the following functions:
This class supports a few convenient operations in addition to the requirements that the concept GeneralPolygon_2
lists.
Related Functions  
(Note that these are not member functions.)  
template<class ArrTraits >  
std::istream &  operator>> (std::istream &in, CGAL::General_polygon_2< ArrTraits > &P) 
This operator imports a general polygon from the input stream in . More...  
template<class ArrTraits >  
std::ostream &  operator<< (std::ostream &out, CGAL::General_polygon_2< ArrTraits > &P) 
This operator exports a general polygon to the output stream out . More...  
Types  
typedef unspecified_type  Size 
number of edges size type.  
typedef ArrTraits::Curve_2  Curve_2 
a general planar curve.  
Construction  
template<class CurveIterator >  
General_polygon_2 (CurveIterator begin, CurveIterator end)  
constructs a General_polygon_2 from a \(X\)monotone curves.  
Operations  
Size  size () 
returns the number of edges of the general polygon.  
Modifiers  
void  clear () 
clears the polygon.  
void  reverse_orientation () 
reverses the orientation of the polygon. More...  
Predicates  
bool  is_empty () 
returns true if the polygon is empty, and false otherwise.  
Orientation  orientation () 
returns the orientation of the polygon. More...  
Orientation CGAL::General_polygon_2< ArrTraits >::orientation  (  ) 
returns the orientation of the polygon.
is_simple()
. void CGAL::General_polygon_2< ArrTraits >::reverse_orientation  (  ) 
reverses the orientation of the polygon.
is_simple()
.

related 
This operator exports a general polygon to the output stream out
.
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 curves of the outer boundary is exported followed by the curves themselves in counterclockwise order.

related 
This operator imports a general polygon from the input stream in
.
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.