CGAL 6.2 - 3D Mesh Generation

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Mesh_3/mesh_implicit_domains.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>
namespace params = CGAL::parameters;
#ifdef CGAL_CONCURRENT_MESH_3
typedef CGAL::Parallel_tag Concurrency_tag;
#else
typedef CGAL::Sequential_tag Concurrency_tag;
#endif
// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef FT_to_point_function_wrapper<double, K::Point_3> Function;
typedef CGAL::Implicit_multi_domain_to_labeling_function_wrapper<Function>
Function_wrapper;
typedef Function_wrapper::Function_vector Function_vector;
typedef CGAL::Labeled_mesh_domain_3<K> Mesh_domain;
// Triangulation
typedef CGAL::Mesh_triangulation_3<Mesh_domain,CGAL::Default,Concurrency_tag>::type Tr;
typedef CGAL::Mesh_complex_3_in_triangulation_3<Tr> C3t3;
// 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);
// Domain (Warning: Sphere_3 constructor uses square radius !)
Mesh_domain domain(Function_wrapper(v), 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);
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Implicit_multi_domain_to_labeling_function_wrapper
The class Implicit_multi_domain_to_labeling_function_wrapper is a helper class to get a function with...
Definition: Implicit_to_labeling_function_wrapper.h:114
CGAL::Labeled_mesh_domain_3
The class Labeled_mesh_domain_3 implements indexed domains.
Definition: Labeled_mesh_domain_3.h:53
CGAL::Mesh_complex_3_in_triangulation_3
CGAL::Mesh_criteria_3
The class gathers the refinement criteria for mesh tetrahedra and surface facets where surface facets...
Definition: Mesh_criteria_3.h:186
unspecified_type
CGAL::square
NT square(const NT &x)
CGAL::perturb_mesh_3
Mesh_optimization_return_code perturb_mesh_3(C3T3 &c3t3, const MeshDomain &domain, const NamedParameters &np=parameters::default_values())
The function perturb_mesh_3() is a mesh optimizer that improves the quality of a Delaunay mesh by cha...
Definition: perturb_mesh_3.h:105
CGAL::exude_mesh_3
Mesh_optimization_return_code exude_mesh_3(C3T3 &c3t3, const NamedParameters &np=parameters::default_values())
The function exude_mesh_3() performs a sliver exudation process on a Delaunay mesh.
Definition: exude_mesh_3.h:95
CGAL::IO::write_MEDIT
void write_MEDIT(std::ostream &os, const T3 &t3, const NamedParameters &np=parameters::default_values())
CGAL::ORIGIN
const CGAL::Origin ORIGIN
CGAL::parameters
CGAL::Parallel_tag
CGAL::Sequential_tag