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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_complex_mesh_domain_3.h>
#include <CGAL/make_mesh_3.h>
#include <cstdlib>
#include <cassert>
// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Mesh_polyhedron_3<K>::type Polyhedron;
typedef CGAL::Polyhedral_complex_mesh_domain_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;
const char* const filenames[] = {
"meshes/patch-01.off",
"meshes/patch-13.off",
"meshes/patch-20.off",
"meshes/patch-21.off",
"meshes/patch-23.off",
"meshes/patch-30.off"
};
const std::pair<int, int> incident_subdomains[] = {
std::make_pair(0, 1),
std::make_pair(1, 3),
std::make_pair(2, 0),
std::make_pair(2, 1),
std::make_pair(2, 3),
std::make_pair(3, 0),
};
int main()
{
const std::size_t nb_patches = sizeof(filenames) / sizeof(const char*);
assert(sizeof(incident_subdomains) == nb_patches * sizeof(std::pair<int, int>));
std::vector<Polyhedron> patches(nb_patches);
for(std::size_t i = 0; i < nb_patches; ++i) {
std::ifstream input(CGAL::data_file_path(filenames[i]));
if(!(input >> patches[i])) {
std::cerr << "Error reading " << CGAL::data_file_path(filenames[i]) << " as a polyhedron!\n";
return EXIT_FAILURE;
}
}
// Create domain
Mesh_domain domain(patches.begin(), patches.end(),
incident_subdomains, incident_subdomains+nb_patches);
domain.detect_features(); //includes detection of borders
// Mesh criteria
Mesh_criteria criteria(params::edge_size(8).
facet_angle(25).facet_size(8).facet_distance(0.2).
cell_radius_edge_ratio(3).cell_size(10));
// Mesh generation
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria);
// Output
std::ofstream medit_file("out.mesh");
CGAL::IO::write_MEDIT(medit_file, c3t3);
medit_file.close();
return EXIT_SUCCESS;
}
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