CGAL 5.6.3 - Polygon Mesh Processing

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Polygon_mesh_processing/mesh_smoothing_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/angle_and_area_smoothing.h>
#include <CGAL/Polygon_mesh_processing/detect_features.h>
#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
#include <iostream>
#include <string>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Surface_mesh<K::Point_3> Mesh;
typedef boost::graph_traits<Mesh>::edge_descriptor edge_descriptor;
namespace PMP = CGAL::Polygon_mesh_processing;
int main(int argc, char** argv)
{
const std::string filename = argc > 1 ? argv[1] : CGAL::data_file_path("meshes/anchor_dense.off");
Mesh mesh;
if(!PMP::IO::read_polygon_mesh(filename, mesh))
{
std::cerr << "Invalid input." << std::endl;
return 1;
}
// Constrain edges with a dihedral angle over 60°
typedef boost::property_map<Mesh, CGAL::edge_is_feature_t>::type EIFMap;
EIFMap eif = get(CGAL::edge_is_feature, mesh);
PMP::detect_sharp_edges(mesh, 60, eif);
int sharp_counter = 0;
for(edge_descriptor e : edges(mesh))
if(get(eif, e))
++sharp_counter;
std::cout << sharp_counter << " sharp edges" << std::endl;
const unsigned int nb_iterations = (argc > 2) ? std::atoi(argv[2]) : 10;
std::cout << "Smoothing mesh... (" << nb_iterations << " iterations)" << std::endl;
// Smooth with both angle and area criteria + Delaunay flips
PMP::angle_and_area_smoothing(mesh, CGAL::parameters::number_of_iterations(nb_iterations)
.use_safety_constraints(false) // authorize all moves
.edge_is_constrained_map(eif));
CGAL::IO::write_polygon_mesh("mesh_smoothed.off", mesh, CGAL::parameters::stream_precision(17));
std::cout << "Done!" << std::endl;
return EXIT_SUCCESS;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Surface_mesh
CGAL::IO::write_polygon_mesh
bool write_polygon_mesh(const std::string &fname, Graph &g, const NamedParameters &np=parameters::default_values())