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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/boost/graph/graph_traits_Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/triangulate_faces.h>
#include <boost/foreach.hpp>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef Kernel::Point_3 Point;
typedef CGAL::Surface_mesh<Point> Surface_mesh;
int main(int argc, char* argv[])
{
const char* filename = (argc > 1) ? argv[1] : "data/P.off";
const char* outfilename = (argc > 2) ? argv[2] : "P_tri.off";
std::ifstream input(filename);
Surface_mesh mesh;
if (!input || !(input >> mesh) || mesh.is_empty())
{
std::cerr << "Not a valid off file." << std::endl;
return 1;
}
CGAL::Polygon_mesh_processing::triangulate_faces(mesh);
// Confirm that all faces are triangles.
BOOST_FOREACH(boost::graph_traits<Surface_mesh>::face_descriptor fit, faces(mesh))
if (next(next(halfedge(fit, mesh), mesh), mesh)
!= prev(halfedge(fit, mesh), mesh))
std::cerr << "Error: non-triangular face left in mesh." << std::endl;
std::ofstream cube_off(outfilename);
cube_off << mesh;
return 0;
}
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