CGAL 6.1.1 - 3D Mesh Generation

Loading...
Searching...
No Matches
Mesh_3/mesh_optimization_lloyd_example.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/Labeled_mesh_domain_3.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/Image_3.h>
// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Labeled_mesh_domain_3<K> Mesh_domain;
#ifdef CGAL_CONCURRENT_MESH_3
typedef CGAL::Parallel_tag Concurrency_tag;
#else
typedef CGAL::Sequential_tag Concurrency_tag;
#endif
// 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;
namespace params = CGAL::parameters;
int main(int argc, char*argv[])
{
const std::string fname = (argc>1)?argv[1]:CGAL::data_file_path("images/liver.inr.gz");
// Domain
CGAL::Image_3 image;
if(!image.read(fname)){
std::cerr << "Error: Cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
Mesh_domain domain = Mesh_domain::create_labeled_image_mesh_domain(image);
// Mesh criteria
Mesh_criteria criteria(params::facet_angle(30).facet_distance(1.2).
cell_radius_edge_ratio(2));
// Mesh generation and optimization in one call
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria,
params::lloyd(params::time_limit(30)).
no_perturb().
exude(params::time_limit(10).sliver_bound(10)));
// Mesh generation and optimization in several call
C3t3 c3t3_bis = CGAL::make_mesh_3<C3t3>(domain, criteria,
params::no_perturb().no_exude());
CGAL::lloyd_optimize_mesh_3(c3t3_bis, domain, params::time_limit(30));
CGAL::exude_mesh_3(c3t3_bis, params::sliver_bound(10), params::time_limit(10));
// Output
std::ofstream medit_file("out.mesh");
CGAL::IO::write_MEDIT(medit_file, c3t3);
medit_file.close();
std::ofstream medit_file_bis("out_bis.mesh");
CGAL::IO::write_MEDIT(medit_file_bis, c3t3_bis);
medit_file_bis.close();
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Image_3
The class Image_3 is a C++ wrapper around the InrImage library.
Definition: Image_3.h:11
CGAL::Image_3::read
bool read(const char *file)
Open a 3D image file.
CGAL::Labeled_mesh_domain_3
The class Labeled_mesh_domain_3 implements indexed domains.
Definition: Labeled_mesh_domain_3.h:354
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::lloyd_optimize_mesh_3
Mesh_optimization_return_code lloyd_optimize_mesh_3(C3T3 &c3t3, const MeshDomain &domain, const NamedParameters &np=parameters::default_values())
The function lloyd_optimize_mesh_3() is a mesh optimization process based on the minimization of a gl...
Definition: lloyd_optimize_mesh_3.h:138
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::parameters
CGAL::Parallel_tag
CGAL::Sequential_tag