int main(int argc, char * argv[])
{
std::cerr << "PARAMETERIZATION" << std::endl;
std::cerr << " Floater parameterization" << std::endl;
std::cerr << " Circle border" << std::endl;
std::cerr << " Eigen solver" << std::endl;
//***************************************
// decode parameters
//***************************************
if (argc-1 != 1)
{
std::cerr << "Usage: " << argv[0] << " input_file.off" << std::endl;
return(EXIT_FAILURE);
}
// File name is:
const char* input_filename = argv[1];
//***************************************
// Read the mesh
//***************************************
// Read the mesh
std::ifstream stream(input_filename);
Polyhedron mesh;
stream >> mesh;
if(!stream || !mesh.is_valid() || mesh.empty())
{
std::cerr << "Error: cannot read OFF file " << input_filename << std::endl;
return EXIT_FAILURE;
}
//***************************************
// Create Polyhedron adaptor
// Note: no cutting => we support only
// meshes that are topological disks
//***************************************
typedef CGAL::Parameterization_polyhedron_adaptor_3<Polyhedron>
Parameterization_polyhedron_adaptor;
Timer t;
t.start();
Parameterization_polyhedron_adaptor mesh_adaptor(mesh);
//***************************************
// Floater Mean Value Coordinates parameterization
// (circular border) with Eigen solver
//***************************************
// Circular border parameterizer (the default)
typedef CGAL::Circular_border_arc_length_parameterizer_3<Parameterization_polyhedron_adaptor>
Border_parameterizer;
// Eigen solver
typedef CGAL::Eigen_solver_traits<Eigen::BiCGSTAB<CGAL::Eigen_sparse_matrix<double>::EigenType, Eigen::IncompleteLUT< double > > > Solver;
// Floater Mean Value Coordinates parameterization
// (circular border) with Eigen solver
typedef CGAL::Mean_value_coordinates_parameterizer_3<Parameterization_polyhedron_adaptor,
Border_parameterizer,
Solver>
Parameterizer;
Parameterizer::Error_code err = CGAL::parameterize(mesh_adaptor, Parameterizer());
t.stop();
switch(err) {
case Parameterizer::OK: // Success
break;
case Parameterizer::ERROR_EMPTY_MESH: // Input mesh not supported
case Parameterizer::ERROR_NON_TRIANGULAR_MESH:
case Parameterizer::ERROR_NO_TOPOLOGICAL_DISC:
case Parameterizer::ERROR_BORDER_TOO_SHORT:
std::cerr << "Input mesh not supported: " << Parameterizer::get_error_message(err) << std::endl;
return EXIT_FAILURE;
break;
default: // Error
std::cerr << "Error: " << Parameterizer::get_error_message(err) << std::endl;
return EXIT_FAILURE;
break;
};
//***************************************
// Output
//***************************************
// Raw output: dump (u,v) pairs
Polyhedron::Vertex_const_iterator pVertex;
for (pVertex = mesh.vertices_begin();
pVertex != mesh.vertices_end();
pVertex++)
{
// (u,v) pair is stored in any halfedge
double u = mesh_adaptor.info(pVertex->halfedge())->uv().x();
double v = mesh_adaptor.info(pVertex->halfedge())->uv().y();
std::cout << "(u,v) = (" << u << "," << v << ")" << std::endl;
}
std::cerr << t.time() << "sec." << std::endl;
return EXIT_SUCCESS;
}
int main(int argc, char * argv[])
{
std::cerr << "PARAMETERIZATION" << std::endl;
std::cerr << " Floater parameterization" << std::endl;
std::cerr << " Circle border" << std::endl;
std::cerr << " OpenNL solver" << std::endl;
std::cerr << " Very simple cut if model is not a topological disk" << std::endl;
//***************************************
// decode parameters
//***************************************
if (argc-1 != 1)
{
std::cerr << "Usage: " << argv[0] << " input_file.off" << std::endl;
return(EXIT_FAILURE);
}
// File name is:
const char* input_filename = argv[1];
//***************************************
// Read the mesh
//***************************************
// Read the mesh
std::ifstream stream(input_filename);
Polyhedron mesh;
stream >> mesh;
if(!stream || !mesh.is_valid() || mesh.empty())
{
std::cerr << "Error: cannot read OFF file " << input_filename << std::endl;
return EXIT_FAILURE;
}
//***************************************
// Create Polyhedron adaptor
//***************************************
Parameterization_polyhedron_adaptor mesh_adaptor(mesh);
//***************************************
// Virtually cut mesh
//***************************************
// The parameterization methods support only meshes that
// are topological disks => we need to compute a "cutting" of the mesh
// that makes it homeomorphic to a disk
Seam seam = cut_mesh(mesh_adaptor);
if (seam.empty())
{
std::cerr << "Input mesh not supported: the example cutting algorithm is too simple to cut this shape" << std::endl;
return EXIT_FAILURE;
}
// Create a second adaptor that virtually "cuts" the mesh following the 'seam' path
typedef CGAL::Parameterization_mesh_patch_3<Parameterization_polyhedron_adaptor>
Mesh_patch_polyhedron;
Mesh_patch_polyhedron mesh_patch(mesh_adaptor, seam.begin(), seam.end());
if (!mesh_patch.is_valid())
{
std::cerr << "Input mesh not supported: non manifold shape or invalid cutting" << std::endl;
return EXIT_FAILURE;
}
//***************************************
// Floater Mean Value Coordinates parameterization
//***************************************
typedef CGAL::Parameterizer_traits_3<Mesh_patch_polyhedron>
Parameterizer; // Type that defines the error codes
Parameterizer::Error_code err = CGAL::parameterize(mesh_patch);
switch(err) {
case Parameterizer::OK: // Success
break;
case Parameterizer::ERROR_EMPTY_MESH: // Input mesh not supported
case Parameterizer::ERROR_NON_TRIANGULAR_MESH:
case Parameterizer::ERROR_NO_TOPOLOGICAL_DISC:
case Parameterizer::ERROR_BORDER_TOO_SHORT:
std::cerr << "Input mesh not supported: " << Parameterizer::get_error_message(err) << std::endl;
return EXIT_FAILURE;
break;
default: // Error
std::cerr << "Error: " << Parameterizer::get_error_message(err) << std::endl;
return EXIT_FAILURE;
break;
};
//***************************************
// Output
//***************************************
// Raw output: dump (u,v) pairs
Polyhedron::Vertex_const_iterator pVertex;
for (pVertex = mesh.vertices_begin();
pVertex != mesh.vertices_end();
pVertex++)
{
// (u,v) pair is stored in any halfedge
double u = mesh_adaptor.info(pVertex->halfedge())->uv().x();
double v = mesh_adaptor.info(pVertex->halfedge())->uv().y();
std::cout << "(u,v) = (" << u << "," << v << ")" << std::endl;
}
return EXIT_SUCCESS;
}
