CGAL 6.2 - 3D Mesh Generation

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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 K = CGAL::Exact_predicates_inexact_constructions_kernel;
using Mesh_domain = CGAL::Labeled_mesh_domain_3<K>;
// Triangulation
using Tr = CGAL::Mesh_triangulation_3<Mesh_domain,
CGAL::Default,
CGAL::Parallel_if_available_tag>::type;
using C3t3 = CGAL::Mesh_complex_3_in_triangulation_3<Tr>;
// Criteria
using Mesh_criteria = CGAL::Mesh_criteria_3<Tr>;
namespace params = CGAL::parameters;
int main(int argc, char* argv[])
{
const std::string fname = (argc > 1) ? argv[1] : CGAL::data_file_path("images/420.inr");// liver.inr.gz");
CGAL::Image_3 image;
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 =
CGAL::Mesh_3::generate_label_weights(image, sigma);
Mesh_domain domain
= Mesh_domain::create_labeled_image_mesh_domain(image,
params::weights(img_weights).
relative_error_bound(1e-6));
Mesh_criteria criteria(params::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, params::no_exude(), params::no_perturb());
// Output
std::ofstream medit_file("out.mesh");
CGAL::IO::write_MEDIT(medit_file, c3t3);
medit_file.close();
std::ofstream bin_file("out.binary.cgal", std::ios_base::binary);
CGAL::IO::save_binary_file(bin_file, c3t3);
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Image_3
The class Image_3 holds a shared pointer to a 3D image buffer.
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: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
CGAL::Mesh_3::generate_label_weights
CGAL::Image_3 generate_label_weights(const CGAL::Image_3 &image, const float &sigma)
Free function that generates a CGAL::Image_3 of weights associated to each voxel of image,...
Definition: generate_label_weights.h:326
CGAL::IO::save_binary_file
bool save_binary_file(std::ostream &os, const C3T3 &c3t3)
CGAL::IO::write_MEDIT
void write_MEDIT(std::ostream &os, const T3 &t3, const NamedParameters &np=parameters::default_values())
CGAL::parameters
CGAL::Default
CGAL::Mesh_triangulation_3
The class Mesh_triangulation_3 is a class template which provides the triangulation type to be used f...
Definition: Mesh_triangulation_3.h:169
CGAL::Parallel_if_available_tag