1 #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
2 #include <CGAL/Surface_mesh.h>
3 
4 #include <CGAL/Polygon_mesh_processing/smooth_shape.h>
5 #include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
6 
7 #include <iostream>
8 #include <fstream>
9 
10 typedef CGAL::Exact_predicates_inexact_constructions_kernel   K;
11 typedef CGAL::Surface_mesh<K::Point_3>                        Mesh;
12 
13 namespace PMP = CGAL::Polygon_mesh_processing;
14 
main(int argc,char * argv[])15 int main(int argc, char* argv[])
16 {
17   const char* filename = (argc > 1) ? argv[1] : "data/pig.off";
18 
19   Mesh mesh;
20   if(!PMP::IO::read_polygon_mesh(filename, mesh))
21   {
22     std::cerr << "Invalid input." << std::endl;
23     return 1;
24   }
25 
26   const unsigned int nb_iterations = (argc > 2) ? std::atoi(argv[2]) : 10;
27   const double time = (argc > 3) ? std::atof(argv[3]) : 0.0001;
28 
29   std::set<Mesh::Vertex_index> constrained_vertices;
30   for(Mesh::Vertex_index v : vertices(mesh))
31   {
32     if(is_border(v, mesh))
33       constrained_vertices.insert(v);
34   }
35 
36   std::cout << "Constraining: " << constrained_vertices.size() << " border vertices" << std::endl;
37   CGAL::Boolean_property_map<std::set<Mesh::Vertex_index> > vcmap(constrained_vertices);
38 
39   std::cout << "Smoothing shape... (" << nb_iterations << " iterations)" << std::endl;
40   PMP::smooth_shape(mesh, time, PMP::parameters::number_of_iterations(nb_iterations)
41                                                 .vertex_is_constrained_map(vcmap));
42 
43   CGAL::IO::write_polygon_mesh("mesh_shape_smoothed.off", mesh, CGAL::parameters::stream_precision(17));
44 
45   std::cout << "Done!" << std::endl;
46   return EXIT_SUCCESS;
47 }
48