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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>
#include <CGAL/boost/graph/graph_traits_PolyMesh_ArrayKernelT.h>
#include <CGAL/Polygon_mesh_processing/corefinement.h>
#include <iostream>
#include <string>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K; // default kernel for OpenMesh point type
typedef CGAL::Exact_predicates_exact_constructions_kernel EK; // alternatice kernel we want to use
typedef OpenMesh::PolyMesh_ArrayKernelT< > Mesh;
typedef boost::property_map<Mesh, CGAL::dynamic_vertex_property_t<EK::Point_3> >::type Exact_point_map;
struct Exact_vertex_point_map
{
// typedef for the property map
typedef boost::property_traits<Exact_point_map>::value_type value_type;
typedef boost::property_traits<Exact_point_map>::reference reference;
typedef boost::property_traits<Exact_point_map>::key_type key_type;
typedef boost::read_write_property_map_tag category;
// exterior references
Exact_point_map exact_point_map;
Mesh* tm_ptr;
// Converters
CGAL::Cartesian_converter<K, EK> to_exact;
CGAL::Cartesian_converter<EK, K> to_input;
Exact_vertex_point_map()
: tm_ptr(nullptr)
{}
Exact_vertex_point_map(const Exact_point_map& ep, Mesh& tm)
: exact_point_map(ep)
, tm_ptr(&tm)
{
for (key_type v : vertices(tm))
put(exact_point_map, v, to_exact(get(boost::vertex_point, tm, v)));
}
friend
reference get(const Exact_vertex_point_map& map, key_type k)
{
CGAL_precondition(map.tm_ptr!=nullptr);
return get(map.exact_point_map, k);
}
friend
void put(const Exact_vertex_point_map& map, key_type k, const EK::Point_3& p)
{
CGAL_precondition(map.tm_ptr!=nullptr);
put(map.exact_point_map, k, p);
// create the input point from the exact one
put(boost::vertex_point, *map.tm_ptr, k, map.to_input(p));
}
};
namespace PMP = CGAL::Polygon_mesh_processing;
int main(int argc, char* argv[])
{
const std::string filename1 = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/blobby.off");
const std::string filename2 = (argc > 2) ? argv[2] : CGAL::data_file_path("meshes/eight.off");
Mesh mesh1, mesh2;
OpenMesh::IO::read_mesh(mesh1, filename1);
OpenMesh::IO::read_mesh(mesh2, filename2);
Mesh out;
// Create exact map properties
Exact_point_map pm_1 = get(CGAL::dynamic_vertex_property_t<EK::Point_3>(), mesh1);
Exact_point_map pm_2 = get(CGAL::dynamic_vertex_property_t<EK::Point_3>(), mesh2);
Exact_point_map pm_out = get(CGAL::dynamic_vertex_property_t<EK::Point_3>(), out);
// Create exact vertex point map that will provide the point to another kernel and fill the default map
Exact_vertex_point_map vpm_1(pm_1, mesh1);
Exact_vertex_point_map vpm_2(pm_2, mesh2);
Exact_vertex_point_map vpm_out(pm_out, out);
bool valid_union = PMP::corefine_and_compute_union(mesh1, mesh2, out,
CGAL::parameters::vertex_point_map(vpm_1),
CGAL::parameters::vertex_point_map(vpm_2),
CGAL::parameters::vertex_point_map(vpm_out));
if (valid_union)
{
std::cout << "Union was successfully computed\n";
OpenMesh::IO::write_mesh(out, "union.off");
return 0;
}
std::cout << "Union could not be computed\n";
return 1;
}
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