CGAL 5.5.2 - 3D Mesh Generation
Mesh_3/mesh_3D_weighted_image.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/Mesh_3/generate_label_weights.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/Image_3.h>
#include <CGAL/IO/File_binary_mesh_3.h>
#include <CGAL/tags.h>
// Domain
using Mesh_domain = CGAL::Labeled_mesh_domain_3<K>;
// Triangulation
using Tr = CGAL::Mesh_triangulation_3<Mesh_domain,
// Criteria
using Mesh_criteria = CGAL::Mesh_criteria_3<Tr>;
// To avoid verbose function and named parameters call
using namespace CGAL::parameters;
int main(int argc, char* argv[])
{
const std::string fname = (argc > 1) ? argv[1] : CGAL::data_file_path("images/liver.inr.gz");
if(!image.read(fname)){
std::cerr << "Error: Cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
const float sigma = (std::max)(image.vx(), (std::max)(image.vy(), image.vz()));
CGAL::Image_3 img_weights =
Mesh_domain domain
= Mesh_domain::create_labeled_image_mesh_domain(image,
weights = img_weights,
relative_error_bound = 1e-6);
// Mesh criteria
Mesh_criteria criteria(facet_angle=30, facet_size=6, facet_distance=0.5,
cell_radius_edge_ratio=3, cell_size=8);
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria);
// Output
std::ofstream medit_file("out.mesh");
c3t3.output_to_medit(medit_file);
std::ofstream bin_file("out.binary.cgal", std::ios_base::binary);
CGAL::IO::save_binary_file(bin_file, c3t3);
return 0;
}