CGAL 5.4  2D Boolean Operations on Nef Polygons Embedded on the Sphere

#include <CGAL/Nef_polyhedron_S2.h>
Figures figureNefS2SVertexIncidences and figureNefS2SHalfloopIncidences illustrate the incidences of an sface.
An sface is described by its boundaries. An entry item to each boundary cycle can be accessed using the iterator range (sface_cycles_begin()
/sface_cycles_end()
). Additionally, Nef_polyhedron_S2
provides the macro CGAL_forall_sface_cylces_of
. The iterators are of type SFace_cycle_const_iterator
and represent either a shalfedge, a shalfloop, or a svertex.
Creation
There is no need for a user to create a SFace
explicitly. The class Nef_polyhedron_S2<Traits>
manages the needed sfaces internally.
Types  
The following types are the same as in  
typedef unspecified_type  Mark 
type of mark.  
typedef unspecified_type  Object_list 
list of Object handles.  
typedef unspecified_type  Vertex_const_handle 
const handle to Vertex.  
typedef unspecified_type  Volume_const_handle 
const handle to Volume.  
typedef unspecified_type  SFace_const_handle 
const handle to SFace.  
typedef unspecified_type  SFace_cycle_const_iterator 
const iterator over the entries to all sface cycles of a sface .  
Operations  
const Mark &  mark () const 
the mark of the sface .  
SFace_cycle_const_iterator  sface_cycle_begin () const 
iterator over the entries to all sface cycles of the sface .  
SFace_cycle_const_iterator  sface_cycle_end () const 
pasttheend iterator.  