mirror of https://github.com/CGAL/cgal
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include <CGAL/Mesh_triangulation_3.h>
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#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
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#include <CGAL/Mesh_criteria_3.h>
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#include <CGAL/Labeled_mesh_domain_3.h>
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#include <CGAL/Mesh_3/generate_label_weights.h>
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#include <CGAL/make_mesh_3.h>
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#include <CGAL/Image_3.h>
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#include <CGAL/IO/File_binary_mesh_3.h>
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#include <CGAL/tags.h>
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// Domain
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using K = CGAL::Exact_predicates_inexact_constructions_kernel;
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using Mesh_domain = CGAL::Labeled_mesh_domain_3<K>;
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// Triangulation
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using Tr = CGAL::Mesh_triangulation_3<Mesh_domain,
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CGAL::Default,
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CGAL::Parallel_if_available_tag>::type;
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using C3t3 = CGAL::Mesh_complex_3_in_triangulation_3<Tr>;
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// Criteria
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using Mesh_criteria = CGAL::Mesh_criteria_3<Tr>;
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// To avoid verbose function and named parameters call
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using namespace CGAL::parameters;
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int main(int argc, char* argv[])
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{
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/// [Loads image]
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const std::string fname = (argc > 1) ? argv[1] : CGAL::data_file_path("images/liver.inr.gz");
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CGAL::Image_3 image;
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if(!image.read(fname)){
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std::cerr << "Error: Cannot read file " << fname << std::endl;
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return EXIT_FAILURE;
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}
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/// [Loads image]
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/// [Domain creation]
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const float sigma = 10.f;
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CGAL::Image_3 img_weights =
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CGAL::Mesh_3::generate_label_weights(image, sigma);
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Mesh_domain domain
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= Mesh_domain::create_labeled_image_mesh_domain(image,
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weights_new = img_weights,
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relative_error_bound_new = 1e-6);
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/// [Domain creation]
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// Mesh criteria
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Mesh_criteria criteria(facet_angle=30, facet_size=6, facet_distance=0.5,
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cell_radius_edge_ratio=3, cell_size=8);
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/// [Meshing]
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C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria);
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/// [Meshing]
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// Output
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std::ofstream medit_file("out.mesh");
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c3t3.output_to_medit(medit_file);
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std::ofstream bin_file("out.binary.cgal", std::ios_base::binary);
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CGAL::IO::save_binary_file(bin_file, c3t3);
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return 0;
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}
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