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#include <CGAL/Exact_predicates_inexact_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/compute_normal.h>
#include <iostream>
#include <string>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef K::Point_3 Point;
typedef K::Vector_3 Vector;
typedef OpenMesh::PolyMesh_ArrayKernelT< > Mesh;
typedef boost::graph_traits<Mesh>::vertex_descriptor vertex_descriptor;
typedef boost::graph_traits<Mesh>::face_descriptor face_descriptor;
int main(int argc, char* argv[])
{
const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/eight.off");
Mesh mesh;
OpenMesh::IO::read_mesh(mesh, filename);
CGAL::OM_pmap<Mesh, face_descriptor, Vector> fnormals(mesh);
CGAL::OM_pmap<Mesh, vertex_descriptor, Vector> vnormals(mesh);
mesh.add_property(fnormals.handle());
mesh.add_property(vnormals.handle());
Vector v(0, 0, 0);
for(vertex_descriptor vd : vertices(mesh))
put(vnormals, vd, v);
for(face_descriptor fd : faces(mesh))
put(fnormals, fd, v);
CGAL::Polygon_mesh_processing::compute_normals(mesh, vnormals, fnormals,
CGAL::parameters::vertex_point_map(get(CGAL::vertex_point, mesh))
.geom_traits(K()));
std::cout << "Face normals :" << std::endl;
for(face_descriptor fd : faces(mesh))
std::cout << fnormals[fd] << std::endl;
std::cout << "Normals at vertices :" << std::endl;
for(vertex_descriptor vd : vertices(mesh))
std::cout << vnormals[vd] << std::endl;
return 0;
}
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