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#include <CGAL/Combinatorial_map.h>
#include <iostream>
#include <algorithm>
typedef CGAL::Combinatorial_map<3> CMap_3;
typedef CMap_3::Dart_descriptor Dart_descriptor;
// Functor used to display all the vertices of a given volume
template<class CMap, unsigned int i>
struct Display_vertices_of_cell : public CGAL::cpp98::unary_function<CMap, void>
{
Display_vertices_of_cell(const CMap& acmap) :
cmap(acmap),
nb_cell(0)
{}
void operator() (const typename CMap::Dart& d)
{
std::cout<<i<<"-cell "<<++nb_cell<<" : ";
for (typename CMap::template One_dart_per_incident_cell_range<0,i>::
const_iterator it=cmap.template one_dart_per_incident_cell<0,i>
(cmap.dart_descriptor(d)).begin(),
itend=cmap.template one_dart_per_incident_cell<0,i>
(cmap.dart_descriptor(d)).end();
it!=itend; ++it)
{
std::cout << cmap.darts().index(it) << "; ";
}
std::cout<<std::endl;
}
void operator() (const typename CMap::Dart* ptr)
{ operator() (*ptr); }
private:
const CMap& cmap;
unsigned int nb_cell;
};
// Functor used to remove a face
template<class CMap>
struct Remove_face : public CGAL::cpp98::unary_function<CMap, void>
{
Remove_face(CMap& acmap) : cmap(acmap)
{}
void operator() (typename CMap::Dart* d)
{
cmap.template remove_cell<2>(cmap.dart_descriptor(*d));
std::cout<<"CMap characteristics: ";
cmap.display_characteristics(std::cout) << ", valid=" << cmap.is_valid()
<< std::endl;
}
private:
CMap& cmap;
};
// Functor allowing to transform a variable into its address.
template<typename T>
struct Take_address : public CGAL::cpp98::unary_function<T, T*>
{
T* operator() (T& t) const
{ return &t; }
};
int main()
{
CMap_3 cmap;
// Create two tetrahedra.
Dart_descriptor d1 = cmap.make_combinatorial_tetrahedron();
Dart_descriptor d2 = cmap.make_combinatorial_tetrahedron();
// Display the vertices of each volume by iterating on darts.
std::cout<<"********Volumes********"<<std::endl;
std::for_each(cmap.one_dart_per_cell<3>().begin(),
cmap.one_dart_per_cell<3>().end(),
Display_vertices_of_cell<CMap_3,3>(cmap));
// 3-Sew the 2 tetrahedra along one facet
cmap.sew<3>(d1, d2);
// Display the vertices of each face by iterating on darts.
std::cout<<"********Faces********"<<std::endl;
std::for_each(cmap.one_dart_per_cell<2>().begin(),
cmap.one_dart_per_cell<2>().end(),
Display_vertices_of_cell<CMap_3,2>(cmap));
// We display the map characteristics.
std::cout<<"CMap characteristics: ";
cmap.display_characteristics(std::cout) << ", valid=" << cmap.is_valid()
<< std::endl << std::endl;
std::vector<CMap_3::Dart*> toremove;
// Copy in vector toremove one dart per face
std::copy(boost::transform_iterator<Take_address<CMap_3::Dart>,
CMap_3::One_dart_per_cell_range<2>::iterator>
(cmap.one_dart_per_cell<2>().begin(),
Take_address<CMap_3::Dart>()),
boost::transform_iterator<Take_address<CMap_3::Dart>,
CMap_3::One_dart_per_cell_range<2>::iterator>
(cmap.one_dart_per_cell<2>().end(),
Take_address<CMap_3::Dart>()),
back_inserter(toremove));
// Remove each face sequentially.
std::for_each(toremove.begin(), toremove.end(), Remove_face<CMap_3>(cmap));
return EXIT_SUCCESS;
}
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