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CGAL 4.8 - Polygon Mesh Processing

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Polygon_mesh_processing/isotropic_remeshing_example.cpp
#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/remesh.h>
#include <CGAL/Polygon_mesh_processing/border.h>
#include <boost/function_output_iterator.hpp>
#include <fstream>
#include <vector>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Surface_mesh<K::Point_3> Mesh;
typedef boost::graph_traits<Mesh>::halfedge_descriptor halfedge_descriptor;
typedef boost::graph_traits<Mesh>::edge_descriptor edge_descriptor;
namespace PMP = CGAL::Polygon_mesh_processing;
struct halfedge2edge
{
halfedge2edge(const Mesh& m, std::vector<edge_descriptor>& edges)
: m_mesh(m), m_edges(edges)
{}
void operator()(const halfedge_descriptor& h) const
{
m_edges.push_back(edge(h, m_mesh));
}
const Mesh& m_mesh;
std::vector<edge_descriptor>& m_edges;
};
int main(int argc, char* argv[])
{
const char* filename = (argc > 1) ? argv[1] : "data/pig.off";
std::ifstream input(filename);
Mesh mesh;
if (!input || !(input >> mesh)) {
std::cerr << "Not a valid off file." << std::endl;
return 1;
}
double target_edge_length = 0.04;
unsigned int nb_iter = 3;
std::cout << "Split border...";
std::vector<edge_descriptor> border;
PMP::border_halfedges(faces(mesh),
mesh,
boost::make_function_output_iterator(halfedge2edge(mesh, border)));
PMP::split_long_edges(border, target_edge_length, mesh);
std::cout << "done." << std::endl;
std::cout << "Start remeshing of " << filename
<< " (" << num_faces(mesh) << " faces)..." << std::endl;
PMP::isotropic_remeshing(
faces(mesh),
target_edge_length,
mesh,
PMP::parameters::number_of_iterations(nb_iter)
.protect_constraints(true)//i.e. protect border, here
);
std::cout << "Remeshing done." << std::endl;
return 0;
}