text: #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
  #include <CGAL/Surface_mesh.h>
  
  #include <CGAL/optimal_bounding_box.h>
  #include <CGAL/Polygon_mesh_processing/triangulate_faces.h>
  #include <CGAL/Polygon_mesh_processing/measure.h>
  #include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
  
  #include <CGAL/Real_timer.h>
  
  #include <fstream>
  #include <iostream>
  
  namespace PMP = CGAL::Polygon_mesh_processing;
  
  typedef CGAL::Exact_predicates_inexact_constructions_kernel    K;
  typedef K::Point_3                                             Point;
  
  typedef CGAL::Surface_mesh<Point>                              Surface_mesh;
  
  int main(int argc, char** argv)
  {
    const char* filename = (argc > 1) ? argv[1] : "data/pig.off";
  
    Surface_mesh sm;
    if(!PMP::IO::read_polygon_mesh(filename, sm) || sm.is_empty())
    {
      std::cerr << "Invalid input file." << std::endl;
      return EXIT_FAILURE;
    }
  
    CGAL::Real_timer timer;
    timer.start();
  
    // Compute the extreme points of the mesh, and then a tightly fitted oriented bounding box
    std::array<Point, 8> obb_points;
    CGAL::oriented_bounding_box(sm, obb_points,
                                CGAL::parameters::use_convex_hull(true));
  
    std::cout << "Elapsed time: " << timer.time() << std::endl;
  
    // Make a mesh out of the oriented bounding box
    Surface_mesh obb_sm;
    CGAL::make_hexahedron(obb_points[0], obb_points[1], obb_points[2], obb_points[3],
                          obb_points[4], obb_points[5], obb_points[6], obb_points[7], obb_sm);
    std::ofstream("obb.off") << obb_sm;
  
    PMP::triangulate_faces(obb_sm);
    std::cout << "Volume: " << PMP::volume(obb_sm) << std::endl;
  
    return EXIT_SUCCESS;
  }
  