CGAL 6.2 - Tetrahedral Remeshing

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Tetrahedral_remeshing/tetrahedral_remeshing_with_features.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Tetrahedral_remeshing/Remeshing_triangulation_3.h>
#include <CGAL/tetrahedral_remeshing.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/detect_features.h>
#include <CGAL/link_to_face_graph.h>
#include <CGAL/property_map.h>
#include <boost/iterator/function_output_iterator.hpp>
#include <CGAL/IO/File_medit.h>
#include "tetrahedral_remeshing_generate_input.h"
using K = CGAL::Exact_predicates_inexact_constructions_kernel;
using Remeshing_triangulation = CGAL::Tetrahedral_remeshing::Remeshing_triangulation_3<K>;
using Point = Remeshing_triangulation::Point;
using Vertex_handle = Remeshing_triangulation::Vertex_handle;
using Vertex_pair = std::pair<Vertex_handle, Vertex_handle>;
using Constraints_set = std::unordered_set<Vertex_pair, boost::hash<Vertex_pair>>;
using Constraints_pmap = CGAL::Boolean_property_map<Constraints_set>;
using Surface_mesh = CGAL::Surface_mesh<K::Point_3>;
int main(int argc, char* argv[])
{
const double target_edge_length = (argc > 1) ? atof(argv[1]) : 0.02;
const int nb_iter = (argc > 2) ? atoi(argv[2]) : 1;
const int nbv = (argc > 3) ? atoi(argv[3]) : 500;
Remeshing_triangulation t3;
CGAL::Tetrahedral_remeshing::generate_input_cube(nbv, t3);
// detect sharp edges on the domain boundary and add them as constraints
Surface_mesh boundary;
auto sm_to_t3_vm = boundary.add_property_map<Surface_mesh::Vertex_index, Vertex_handle>("v:v2v").first;
auto v2v_out = boost::make_function_output_iterator([sm_to_t3_vm](const std::pair<Vertex_handle, Surface_mesh::Vertex_index>& p)
{put(sm_to_t3_vm,p.second, p.first);});
CGAL::link_to_face_graph(t3, t3.infinite_vertex(), boundary,
CGAL::parameters::vertex_to_vertex_output_iterator(v2v_out));
auto ecm = boundary.add_property_map<Surface_mesh::Edge_index, bool>("e:ecm", false).first;
CGAL::Polygon_mesh_processing::detect_sharp_edges(boundary, 60., ecm);
Constraints_set constraints;
for (Surface_mesh::Edge_index e : edges(boundary))
if (get(ecm,e))
constraints.emplace(CGAL::make_sorted_pair(get(sm_to_t3_vm,source(e, boundary)),
get(sm_to_t3_vm,target(e, boundary))));
// run remeshing on t3 with constraints
CGAL::tetrahedral_isotropic_remeshing(t3, target_edge_length,
CGAL::parameters::edge_is_constrained_map(Constraints_pmap(constraints))
.number_of_iterations(nb_iter));
std::ofstream out("cube_remeshed.mesh");
CGAL::IO::write_MEDIT(out, t3);
return EXIT_SUCCESS;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Surface_mesh
CGAL::Tetrahedral_remeshing::Remeshing_triangulation_3
The class Remeshing_triangulation_3 is a class template which provides a valid triangulation type tha...
Definition: Remeshing_triangulation_3.h:59
CGAL::IO::write_MEDIT
void write_MEDIT(std::ostream &os, const T3 &t3, const NamedParameters &np=parameters::default_values())
CGAL::tetrahedral_isotropic_remeshing
void tetrahedral_isotropic_remeshing(CGAL::Triangulation_3< Traits, TDS, SLDS > &tr, const SizingFunction &sizing, const NamedParameters &np=parameters::default_values())
remeshes a tetrahedral mesh.
Definition: tetrahedral_remeshing.h:187
CGAL::link_to_face_graph
boost::graph_traits< TriangleMesh >::vertex_descriptor link_to_face_graph(const Triangulation_3 &t, typename Triangulation_3::Vertex_handle vh, TriangleMesh &tm, const NamedParameters &np=parameters::default_values())