CGAL 4.7 - Polygon Mesh Processing: Polygon_mesh_processing/hole_filling_example.cpp

\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.7 - Polygon Mesh Processing

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Polygon_mesh_processing/hole_filling_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/IO/Polyhedron_iostream.h>
#include <CGAL/boost/graph/graph_traits_Polyhedron_3.h>
#include <CGAL/Polygon_mesh_processing/triangulate_hole.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <boost/foreach.hpp>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
typedef Polyhedron::Halfedge_handle Halfedge_handle;
typedef Polyhedron::Facet_handle Facet_handle;
typedef Polyhedron::Vertex_handle Vertex_handle;
int main(int argc, char* argv[])
{
const char* filename = (argc > 1) ? argv[1] : "data/mech-holes-shark.off";
std::ifstream input(filename);
Polyhedron poly;
if ( !input || !(input >> poly) || poly.empty() ) {
std::cerr << "Not a valid off file." << std::endl;
return 1;
}
// Incrementally fill the holes
unsigned int nb_holes = 0;
BOOST_FOREACH(Halfedge_handle h, halfedges(poly))
{
if(h->is_border())
{
std::vector<Facet_handle> patch_facets;
std::vector<Vertex_handle> patch_vertices;
bool success = CGAL::cpp11::get<0>(
CGAL::Polygon_mesh_processing::triangulate_refine_and_fair_hole(
poly,
h,
std::back_inserter(patch_facets),
std::back_inserter(patch_vertices),
CGAL::Polygon_mesh_processing::parameters::vertex_point_map(get( CGAL::vertex_point, poly)).
geom_traits(Kernel())) );
std::cout << " Number of facets in constructed patch: " << patch_facets.size() << std::endl;
std::cout << " Number of vertices in constructed patch: " << patch_vertices.size() << std::endl;
std::cout << " Fairing : " << (success ? "succeeded" : "failed") << std::endl;
++nb_holes;
}
}
std::cout << std::endl;
std::cout << nb_holes << " holes have been filled" << std::endl;
std::ofstream out("filled.off");
out.precision(17);
out << poly << std::endl;
return 0;
}