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#include <iostream>
#include <CGAL/Mesh_triangulation_3.h>
#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
#include <CGAL/Mesh_criteria_3.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/Image_3.h>
/// [Domain definition]
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Mesh_domain_with_polyline_features_3.h>
#include <CGAL/Labeled_mesh_domain_3.h>
#include <CGAL/Mesh_3/generate_label_weights.h>
#include <CGAL/Mesh_3/Detect_features_in_image.h>
using K = CGAL::Exact_predicates_inexact_constructions_kernel;
using Image_domain = CGAL::Labeled_mesh_domain_3<K>;
using Mesh_domain = CGAL::Mesh_domain_with_polyline_features_3<Image_domain>;
/// [Domain definition]
#ifdef CGAL_CONCURRENT_MESH_3
using Concurrency_tag = CGAL::Parallel_tag;
#else
using Concurrency_tag = CGAL::Sequential_tag;
#endif
// Triangulation
using Tr = CGAL::Mesh_triangulation_3<Mesh_domain,CGAL::Default,Concurrency_tag>::type;
using C3t3 = CGAL::Mesh_complex_3_in_triangulation_3<Tr>;
// Criteria
using Mesh_criteria = CGAL::Mesh_criteria_3<Tr>;
// To avoid verbose function and named parameters call
using namespace CGAL::parameters;
/// [Add 1D features]
int main(int argc, char* argv[])
{
const std::string fname = (argc > 1) ? argv[1] : CGAL::data_file_path("images/liver.inr.gz");
// Loads image
CGAL::Image_3 image;
if(!image.read(fname)){
std::cerr << "Error: Cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
/// [Domain creation]
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,
weights = std::ref(img_weights),
relative_error_bound = 1e-6,
features_detector = CGAL::Mesh_3::Detect_features_in_image());
/// [Domain creation]
CGAL::Bbox_3 bbox = domain.bbox();
double diag = CGAL::sqrt((bbox.xmax() - bbox.xmin()) * (bbox.xmax() - bbox.xmin())
+ (bbox.ymax() - bbox.ymin()) * (bbox.ymax() - bbox.ymin())
+ (bbox.zmax() - bbox.zmin()) * (bbox.zmax() - bbox.zmin()));
double sizing_default = diag * 0.05;
/// Note that `edge_size` is needed with 1D-features [Mesh criteria]
Mesh_criteria criteria(edge_size = sizing_default,
facet_angle = 30, facet_size = sizing_default, facet_distance = sizing_default / 10,
//facet_topology = CGAL::FACET_VERTICES_ON_SAME_SURFACE_PATCH,
cell_radius_edge_ratio = 0, cell_size = 0
);
/// [Mesh criteria]
// Meshing
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria,
CGAL::parameters::no_exude(),
CGAL::parameters::no_perturb());
// Output
CGAL::dump_c3t3(c3t3, "out");
return 0;
}
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