SMDS_3/c3t3_example.cpp

#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
 
#include <CGAL/Triangulation_3.h>
#include <CGAL/Triangulation_data_structure_3.h>
#include <CGAL/Simplicial_mesh_cell_base_3.h>
#include <CGAL/Simplicial_mesh_vertex_base_3.h>
#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
 
#include <CGAL/tetrahedral_remeshing.h>
 
#include <CGAL/tags.h>
 
#include <CGAL/IO/File_medit.h>
#include <fstream>
 
 
using K = CGAL::Exact_predicates_inexact_constructions_kernel;
 
using Subdomain_index = int;
using Surface_patch_index = unsigned char;
using Curve_index = char;
using Corner_index = short;
 
using Cb = CGAL::Simplicial_mesh_cell_base_3<K, Subdomain_index, Surface_patch_index>;
using Vb = CGAL::Simplicial_mesh_vertex_base_3<K, Subdomain_index, Surface_patch_index,
                                                  Curve_index, Corner_index>;
 
using Tds = CGAL::Triangulation_data_structure_3<Vb, Cb, CGAL::Sequential_tag>;
using Triangulation = CGAL::Triangulation_3<K, Tds>;
 
using C3t3 = CGAL::Mesh_complex_3_in_triangulation_3<Triangulation>;
 
 
int main(int argc, char* argv[])
{
  std::cout.precision(17);
  std::cerr.precision(17);
 
  std::string filename = (argc > 1) ? std::string(argv[1])
                       : CGAL::data_file_path("meshes/elephant.mesh");
 
  Triangulation tr;
 
  std::ifstream is(filename, std::ios_base::in);
  if(!CGAL::IO::read_MEDIT(is, tr))
  {
    std::cerr << "Failed to read" << std::endl;
    return EXIT_FAILURE;
  }
 
  // [call a remeshing algorithm]
 
  std::ofstream os("after_remeshing.mesh");
  CGAL::IO::write_MEDIT(os, tr, CGAL::parameters::all_vertices(true));
  os.close();
 
  Triangulation tr2;
  std::ifstream is2("after_remeshing.mesh");
  if(!CGAL::IO::read_MEDIT(is2, tr2))
  {
    std::cerr << "Failed to read (#2)" << std::endl;
    return EXIT_FAILURE;
  }
 
  std::cout << "Done" << std::endl;
  return EXIT_SUCCESS;
}