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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/boost/graph/graph_traits_Linear_cell_complex_for_combinatorial_map.h>
#include <CGAL/boost/graph/copy_face_graph.h>
#include <CGAL/boost/graph/IO/OFF.h>
#include <iostream>
#include <fstream>
#include <iterator>
#include <unordered_map>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Source;
typedef boost::graph_traits<Source>::vertex_descriptor sm_vertex_descriptor;
typedef boost::graph_traits<Source>::halfedge_descriptor sm_halfedge_descriptor;
typedef boost::graph_traits<Source>::face_descriptor sm_face_descriptor;
typedef CGAL::Exact_predicates_exact_constructions_kernel Other_kernel;
typedef Other_kernel::Point_3 Point;
typedef CGAL::Linear_cell_complex_traits<3, Other_kernel> LCC_traits;
typedef CGAL::Linear_cell_complex_for_bgl_combinatorial_map_helper
<2, 3, LCC_traits>::type LCC;
int main(int argc, char* argv[])
{
Source S;
std::ifstream in((argc>1)?argv[1]:CGAL::data_file_path("meshes/cube_poly.off"));
in >> S;
// Note that the vertex_point property of the Source and Target1
// come from different kernels.
typedef LCC Target1;
Target1 T1;
{
CGAL::copy_face_graph(S, T1);
CGAL::IO::write_OFF("lcc.off", T1);
}
S.clear();
{
typedef boost::graph_traits<Target1>::vertex_descriptor source_vertex_descriptor;
typedef boost::graph_traits<Target1>::halfedge_descriptor source_halfedge_descriptor;
typedef boost::graph_traits<Source>::vertex_descriptor tm_vertex_descriptor;
typedef boost::graph_traits<Source>::halfedge_descriptor tm_halfedge_descriptor;
std::unordered_map<source_vertex_descriptor, tm_vertex_descriptor> v2v;
std::unordered_map<source_halfedge_descriptor, tm_halfedge_descriptor> h2h;
CGAL::copy_face_graph(T1, S, CGAL::parameters::vertex_to_vertex_output_iterator(std::inserter(v2v, v2v.end()))
.halfedge_to_halfedge_output_iterator(std::inserter(h2h, h2h.end())));
std::ofstream out("reverse.off");
out.precision(17);
out << S;
}
return 0;
}
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