\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.8 - Combinatorial Maps

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Combinatorial_map/map_3_with_colored_facets.cpp
#include <CGAL/Combinatorial_map.h>
#include <CGAL/Combinatorial_map_constructors.h>
#include <CGAL/Combinatorial_map_operations.h>
#include <CGAL/Cell_attribute.h>
#include <iostream>
#include <algorithm>
#include <cstdlib>
struct Sum_functor
{
template<class Cell_attribute>
void operator()(Cell_attribute& ca1,Cell_attribute& ca2)
{ ca1.info()=ca1.info()+ca2.info(); }
};
struct Divide_by_two_functor
{
template<class Cell_attribute>
void operator()(Cell_attribute& ca1,Cell_attribute& ca2)
{
ca1.info()=(ca1.info()/2);
ca2.info()=(ca1.info());
}
};
struct Myitem
{
template<class CMap>
struct Dart_wrapper
{
typedef CGAL::Dart<3, CMap> Dart;
typedef CGAL::Cell_attribute<CMap, int, CGAL::Tag_true,
Sum_functor, Divide_by_two_functor> Facet_attribute;
typedef CGAL::cpp11::tuple<void,void,Facet_attribute> Attributes;
};
};
typedef CGAL::Combinatorial_map<3,Myitem> CMap_3;
typedef CMap_3::Dart_handle Dart_handle;
int main()
{
CMap_3 cm;
// Create 2 hexahedra.
Dart_handle dh1 = CGAL::make_combinatorial_hexahedron(cm);
Dart_handle dh2 = CGAL::make_combinatorial_hexahedron(cm);
// 1) Create all 2-attributes and associated them to darts.
for (CMap_3::Dart_range::iterator
it=cm.darts().begin(), itend=cm.darts().end();
it!=itend; ++it)
{
if ( cm.attribute<2>(it)==NULL )
cm.set_attribute<2>(it, cm.create_attribute<2>());
}
// 2) Set the color of all facets of the first hexahedron to 7.
for (CMap_3::One_dart_per_incident_cell_range<2, 3>::iterator
it=cm.one_dart_per_incident_cell<2,3>(dh1).begin(),
itend=cm.one_dart_per_incident_cell<2,3>(dh1).end(); it!=itend; ++it)
{ cm.info<2>(it)=7; }
// 3) Set the color of all facets of the second hexahedron to 13.
for (CMap_3::One_dart_per_incident_cell_range<2, 3>::iterator it=
cm.one_dart_per_incident_cell<2,3>(dh2).begin(),
itend=cm.one_dart_per_incident_cell<2,3>(dh2).end(); it!=itend; ++it)
{ cm.info<2>(it)=13; }
// 4) 3-Sew the two hexahedra along one facet.
cm.sew<3>(dh1, dh2);
// 5) Display all the values of 2-attributes.
for (CMap_3::Attribute_range<2>::type::iterator
it=cm.attributes<2>().begin(), itend=cm.attributes<2>().end();
it!=itend; ++it)
{
std::cout<<cm.info_of_attribute<2>(it)<<"; ";
}
std::cout<<std::endl;
// 6) Insert a vertex in the facet between the two hexahedra.
CGAL::insert_cell_0_in_cell_2(cm, dh2);
// 7) Display all the values of 2-attributes.
for (CMap_3::Attribute_range<2>::type::iterator
it=cm.attributes<2>().begin(), itend=cm.attributes<2>().end();
it!=itend; ++it)
{
std::cout<<cm.info_of_attribute<2>(it)<<"; ";
}
std::cout<<std::endl;
cm.display_characteristics(std::cout);
std::cout<<", valid="<<cm.is_valid()<<std::endl;
return EXIT_SUCCESS;
}