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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/smooth_shape.h>
#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
#include <iostream>
#include <set>
#include <string>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Surface_mesh<K::Point_3> Mesh;
namespace PMP = CGAL::Polygon_mesh_processing;
int main(int argc, char* argv[])
{
const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/pig.off");
Mesh mesh;
if(!PMP::IO::read_polygon_mesh(filename, mesh))
{
std::cerr << "Invalid input." << std::endl;
return 1;
}
const unsigned int nb_iterations = (argc > 2) ? std::atoi(argv[2]) : 10;
const double time = (argc > 3) ? std::atof(argv[3]) : 0.0001;
std::set<Mesh::Vertex_index> constrained_vertices;
for(Mesh::Vertex_index v : vertices(mesh))
{
if(is_border(v, mesh))
constrained_vertices.insert(v);
}
std::cout << "Constraining: " << constrained_vertices.size() << " border vertices" << std::endl;
CGAL::Boolean_property_map<std::set<Mesh::Vertex_index> > vcmap(constrained_vertices);
std::cout << "Smoothing shape... (" << nb_iterations << " iterations)" << std::endl;
PMP::smooth_shape(mesh, time, CGAL::parameters::number_of_iterations(nb_iterations)
.vertex_is_constrained_map(vcmap));
CGAL::IO::write_polygon_mesh("mesh_shape_smoothed.off", mesh, CGAL::parameters::stream_precision(17));
std::cout << "Done!" << std::endl;
return EXIT_SUCCESS;
}
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