mirror of https://github.com/CGAL/cgal
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
#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_mesh_domain_3.h>
|
|
#include <CGAL/make_mesh_3.h>
|
|
#include <CGAL/perturb_mesh_3.h>
|
|
#include <CGAL/exude_mesh_3.h>
|
|
|
|
// Domain
|
|
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
|
|
typedef K::FT FT;
|
|
typedef K::Point_3 Point;
|
|
typedef FT (Function)(const Point&);
|
|
typedef CGAL::Implicit_mesh_domain_3<Function,K> Mesh_domain;
|
|
|
|
// Triangulation
|
|
typedef CGAL::Mesh_triangulation_3<Mesh_domain>::type Tr;
|
|
typedef CGAL::Mesh_complex_3_in_triangulation_3<Tr> C3t3;
|
|
|
|
// Criteria
|
|
typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;
|
|
typedef Mesh_criteria::Facet_criteria Facet_criteria;
|
|
typedef Mesh_criteria::Cell_criteria Cell_criteria;
|
|
|
|
// Function
|
|
FT ellipsoid_function (const Point& p)
|
|
{
|
|
const FT x2=p.x()*p.x();
|
|
const FT y2=p.y()*p.y();
|
|
const FT z2=p.z()*p.z();
|
|
|
|
return x2+2*y2+4*z2-1;
|
|
}
|
|
|
|
// To avoid verbose function and named parameters call
|
|
using namespace CGAL::parameters;
|
|
|
|
int main()
|
|
{
|
|
// Domain (Warning: Sphere_3 constructor uses square radius !)
|
|
Mesh_domain domain(ellipsoid_function, K::Sphere_3(CGAL::ORIGIN, 2.));
|
|
|
|
// Criteria
|
|
Facet_criteria facet_criteria(30, 0.08, 0.025); // angle, size, approximation
|
|
Cell_criteria cell_criteria(2, 0.1); // radius-edge ratio, size
|
|
Mesh_criteria criteria(facet_criteria, cell_criteria);
|
|
|
|
// Mesh generation (without optimization)
|
|
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria, no_perturb(), no_exude());
|
|
|
|
// Output
|
|
std::ofstream medit_file("out_wo.mesh");
|
|
c3t3.output_to_medit(medit_file);
|
|
medit_file.close();
|
|
|
|
// Perturbation (5s, 12degree)
|
|
CGAL::perturb_mesh_3(c3t3, domain, time_limit=5, sliver_bound=12);
|
|
|
|
// Exudation
|
|
CGAL::exude_mesh_3(c3t3, domain);
|
|
|
|
// Output
|
|
medit_file.open("out_optimized.mesh");
|
|
c3t3.output_to_medit(medit_file);
|
|
|
|
return 0;
|
|
}
|
|
|