\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL - Generalized Maps
Generalized_map/gmap_2_moebius.cpp
#include <CGAL/Generalized_map.h>
#include <iostream>
#include <cstdlib>
typedef CGAL::Generalized_map<2> GMap_2;
typedef GMap_2::Dart_handle Dart_handle;
int main()
{
GMap_2 gm;
Dart_handle dh=gm.make_combinatorial_polygon(4);
gm.sew<2>(dh, gm.alpha<1,0,1,0>(dh));
gm.display_characteristics(std::cout);
std::cout<<", valid="<<gm.is_valid()<<std::endl;
return EXIT_SUCCESS;
}