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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/boost/graph/graph_traits_Polyhedron_3.h>
#include <CGAL/IO/Polyhedron_iostream.h>
#include <CGAL/mesh_segmentation.h>
#include <CGAL/property_map.h>
#include <iostream>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
int main()
{
// create and read Polyhedron
Polyhedron mesh;
std::ifstream input("data/cactus.off");
if ( !input || !(input >> mesh) || mesh.empty() ) {
std::cerr << "Not a valid off file." << std::endl;
return EXIT_FAILURE;
}
// create a property-map for segment-ids
typedef std::map<Polyhedron::Facet_const_handle, std::size_t> Facet_int_map;
Facet_int_map internal_segment_map;
boost::associative_property_map<Facet_int_map> segment_property_map(internal_segment_map);
// calculate SDF values and segment the mesh using default parameters.
std::size_t number_of_segments = CGAL::segmentation_via_sdf_values(mesh, segment_property_map);
std::cout << "Number of segments: " << number_of_segments << std::endl;
// print segment-ids
for(Polyhedron::Facet_const_iterator facet_it = mesh.facets_begin();
facet_it != mesh.facets_end(); ++facet_it) {
std::cout << segment_property_map[facet_it] << " ";
}
std::cout << std::endl;
}
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