mirror of https://github.com/CGAL/cgal
67 lines
2.0 KiB
C++
67 lines
2.0 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/Polyhedral_mesh_domain_with_features_3.h>
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#include <CGAL/make_mesh_3.h>
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// Domain
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typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
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typedef CGAL::Polyhedral_mesh_domain_with_features_3<K> Mesh_domain;
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// Polyhedron type
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typedef CGAL::Mesh_polyhedron_3<K>::type Polyhedron;
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// Triangulation
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typedef CGAL::Mesh_triangulation_3<Mesh_domain>::type Tr;
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typedef CGAL::Mesh_complex_3_in_triangulation_3<
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Tr,Mesh_domain::Corner_index,Mesh_domain::Curve_index> C3t3;
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// Criteria
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typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;
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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()
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{
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// Load a polyhedron
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Polyhedron poly;
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std::ifstream input("data/lion-head.off");
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input >> poly;
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if (!CGAL::is_triangle_mesh(poly)){
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std::cerr << "Input geometry is not triangulated." << std::endl;
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return EXIT_FAILURE;
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}
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// Create a vector with only one element: the pointer to the polyhedron.
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std::vector<Polyhedron*> poly_ptrs_vector(1, &poly);
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// Create a polyhedral domain, with only one polyhedron,
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// and no "bounding polyhedron", so the volumetric part of the domain will be
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// empty.
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Mesh_domain domain(poly_ptrs_vector.begin(), poly_ptrs_vector.end());
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// Get sharp features
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domain.detect_features(); //includes detection of borders
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// Mesh criteria
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Mesh_criteria criteria(edge_size = 0.025,
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facet_angle = 25,
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facet_size = 0.1,
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facet_distance = 0.001);
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// Mesh generation
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C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria, no_perturb(), no_exude());
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// Output the facets of the c3t3 to an OFF file. The facets will not be
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// oriented.
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std::ofstream off_file("out.off");
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c3t3.output_boundary_to_off(off_file);
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return off_file.fail() ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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