CGAL - Generalized Maps

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Generalized_map/gmap_3_with_colored_facets.cpp
#include <CGAL/Generalized_map.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 GMap>
struct Dart_wrapper
{
typedef CGAL::Cell_attribute<GMap, int, CGAL::Tag_true,
Sum_functor, Divide_by_two_functor> Facet_attribute;
typedef std::tuple<void,void,Facet_attribute> Attributes;
};
};
typedef CGAL::Generalized_map<3,Myitem> GMap_3;
typedef GMap_3::Dart_descriptor Dart_descriptor;
int main()
{
GMap_3 gm;
// Create 2 hexahedra.
Dart_descriptor d1 = gm.make_combinatorial_hexahedron();
Dart_descriptor d2 = gm.make_combinatorial_hexahedron();
// 1) Create all 2-attributes and associated them to darts.
for (GMap_3::Dart_range::iterator
it=gm.darts().begin(), itend=gm.darts().end();
it!=itend; ++it)
{
if ( gm.attribute<2>(it)==nullptr )
gm.set_attribute<2>(it, gm.create_attribute<2>());
}
// 2) Set the color of all facets of the first hexahedron to 7.
for (GMap_3::One_dart_per_incident_cell_range<2, 3>::iterator
it=gm.one_dart_per_incident_cell<2,3>(d1).begin(),
itend=gm.one_dart_per_incident_cell<2,3>(d1).end(); it!=itend; ++it)
{ gm.info<2>(it)=7; }
// 3) Set the color of all facets of the second hexahedron to 13.
for (GMap_3::One_dart_per_incident_cell_range<2, 3>::iterator it=
gm.one_dart_per_incident_cell<2,3>(d2).begin(),
itend=gm.one_dart_per_incident_cell<2,3>(d2).end(); it!=itend; ++it)
{ gm.info<2>(it)=13; }
// 4) 3-Sew the two hexahedra along one facet.
gm.sew<3>(d1, d2);
// 5) Display all the values of 2-attributes.
for (GMap_3::Attribute_range<2>::type::iterator
it=gm.attributes<2>().begin(), itend=gm.attributes<2>().end();
it!=itend; ++it)
{
std::cout<<gm.info_of_attribute<2>(it)<<"; ";
}
std::cout<<std::endl;
// 6) Insert a vertex in the facet between the two hexahedra.
gm.insert_cell_0_in_cell_2(d2);
// 7) Display all the values of 2-attributes.
for (GMap_3::Attribute_range<2>::type::iterator
it=gm.attributes<2>().begin(), itend=gm.attributes<2>().end();
it!=itend; ++it)
{
std::cout<<gm.info_of_attribute<2>(it)<<"; ";
}
std::cout<<std::endl;
gm.display_characteristics(std::cout);
std::cout<<", valid="<<gm.is_valid()<<std::endl;
return EXIT_SUCCESS;
}
CGAL::Cell_attribute
CGAL::Generalized_map
The class Generalized_map represents a dD generalized map.
Definition: Generalized_map.h:40
CGAL::Tag_true
CGAL::Boolean_tag< true > Tag_true