\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.14.3 - 3D Mesh Generation
Mesh_3/mesh_optimization_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::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
// Mesh Criteria
typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;
// To avoid verbose function and named parameters call
using namespace CGAL::parameters;
int main(int argc, char* argv[])
{
const char* fname = (argc>1)?argv[1]:"data/liver.inr.gz";
// Domain
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(facet_angle=30, facet_size=5, facet_distance=1.5,
cell_radius_edge_ratio=2, cell_size=7);
// Mesh generation and optimization in one call (sliver_bound is the
// targeted dihedral angle in degrees)
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria,
perturb(sliver_bound=10, time_limit=15));
// Mesh generation and optimization in several call
C3t3 c3t3_bis = CGAL::make_mesh_3<C3t3>(domain, criteria,
CGAL::perturb_mesh_3(c3t3_bis, domain, time_limit=15);
// Output
std::ofstream medit_file("out.mesh");
c3t3.output_to_medit(medit_file);
std::ofstream medit_file_bis("out_bis.mesh");
c3t3_bis.output_to_medit(medit_file_bis);
return 0;
}