CGAL 5.6 - 3D Mesh Generation
Mesh_3/mesh_implicit_domains_2.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Mesh_triangulation_3.h>
#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
#include <CGAL/Mesh_criteria_3.h>
#include <CGAL/Implicit_to_labeling_function_wrapper.h>
#include <CGAL/Labeled_mesh_domain_3.h>
#include <CGAL/make_mesh_3.h>
#include "implicit_functions.h"
// IO
#include <CGAL/IO/File_medit.h>
// Domain
typedef FT_to_point_function_wrapper<double, K::Point_3> Function;
Function_wrapper;
typedef Function_wrapper::Function_vector Function_vector;
typedef CGAL::Labeled_mesh_domain_3<K> Mesh_domain;
// Triangulation
// Mesh Criteria
typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;
typedef Mesh_criteria::Facet_criteria Facet_criteria;
typedef Mesh_criteria::Cell_criteria Cell_criteria;
int main()
{
// Define functions
Function f1(&torus_function);
Function f2(&sphere_function<3>);
Function_vector v;
v.push_back(f1);
v.push_back(f2);
std::vector<std::string> vps;
vps.push_back("+-");
namespace params = CGAL::parameters;
Mesh_domain domain(Function_wrapper(v, vps),
K::Sphere_3(CGAL::ORIGIN, CGAL::square(K::FT(5))),
params::relative_error_bound(1e-6));
// Set mesh criteria
Facet_criteria facet_criteria(30, 0.2, 0.02); // angle, size, approximation
Cell_criteria cell_criteria(2., 0.4); // radius-edge ratio, size
Mesh_criteria criteria(facet_criteria, cell_criteria);
// Mesh generation
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria, params::no_exude().no_perturb());
// Perturbation (maximum cpu time: 10s, targeted dihedral angle: default)
CGAL::perturb_mesh_3(c3t3, domain, params::time_limit(10));
// Exudation
CGAL::exude_mesh_3(c3t3, params::time_limit(12));
// Output
std::ofstream medit_file("out.mesh");
CGAL::IO::write_MEDIT(medit_file, c3t3);
medit_file.close();
return 0;
}