CGAL 5.1.2 - Polygon Mesh Processing
Polygon_mesh_processing/shape_smoothing_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/smooth_shape.h>
#include <iostream>
#include <fstream>
int main(int argc, char* argv[])
{
const char* filename = (argc > 1) ? argv[1] : "data/pig.off";
std::ifstream input(filename);
Mesh mesh;
if (!input || !(input >> mesh) || mesh.is_empty())
{
std::cerr << "Not a valid .off file." << std::endl;
return EXIT_FAILURE;
}
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;
std::cout << "Smoothing shape... (" << nb_iterations << " iterations)" << std::endl;
PMP::smooth_shape(mesh, time, PMP::parameters::number_of_iterations(nb_iterations)
.vertex_is_constrained_map(vcmap));
std::ofstream output("mesh_shape_smoothed.off");
output.precision(17);
output << mesh;
std::cout << "Done!" << std::endl;
return EXIT_SUCCESS;
}