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#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/Polyhedral_mesh_domain_with_features_3.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/IO/output_to_vtu.h>
// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Mesh_polyhedron_3<K>::type Polyhedron;
typedef CGAL::Polyhedral_mesh_domain_with_features_3<K> Mesh_domain;
#ifdef CGAL_CONCURRENT_MESH_3
typedef CGAL::Parallel_tag Concurrency_tag;
#else
typedef CGAL::Sequential_tag Concurrency_tag;
#endif
// Triangulation
typedef CGAL::Mesh_triangulation_3<Mesh_domain,CGAL::Default,Concurrency_tag>::type Tr;
typedef CGAL::Mesh_complex_3_in_triangulation_3<
Tr,Mesh_domain::Corner_index,Mesh_domain::Curve_index> C3t3;
// Criteria
typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;
namespace params = CGAL::parameters;
int main(int argc, char*argv[])
{
const std::string fname = (argc>1)?argv[1]:CGAL::data_file_path("meshes/fandisk.off");
std::ifstream input(fname);
Polyhedron polyhedron;
input >> polyhedron;
if(input.fail()){
std::cerr << "Error: Cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
if (!CGAL::is_triangle_mesh(polyhedron)){
std::cerr << "Input geometry is not triangulated." << std::endl;
return EXIT_FAILURE;
}
// Create domain
Mesh_domain domain(polyhedron);
// Get sharp features
domain.detect_features();
// Mesh criteria
Mesh_criteria criteria(params::edge_size(0.025).
facet_angle(25).facet_size(0.05).facet_distance(0.005).
cell_radius_edge_ratio(3).cell_size(0.05));
// Mesh generation
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria);
// Output
std::ofstream file("out.vtu");
CGAL::IO::output_to_vtu(file, c3t3);
// Could be replaced by:
// CGAL::IO::write_MEDIT(file, c3t3);
return EXIT_SUCCESS;
}
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