CGAL 5.6.2 - Polygon Mesh Processing
Polygon_mesh_processing/remesh_planar_patches.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/remesh_planar_patches.h>
#include <CGAL/Polygon_mesh_processing/remesh.h>
#include <CGAL/Polygon_mesh_processing/detect_features.h>
#include <CGAL/Polygon_mesh_processing/triangulate_faces.h>
#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
#include <iostream>
#include <fstream>
typedef Kernel::Point_3 Point_3;
int main()
{
Surface_mesh sm;
CGAL::IO::read_polygon_mesh(CGAL::data_file_path("meshes/cube_quad.off"), sm);
// triangulate faces;
std::cout << "Input mesh has " << faces(sm).size() << " faces" << std::endl;
assert(faces(sm).size()==12);
Surface_mesh::Property_map<Surface_mesh::Edge_index, bool> ecm =
sm.add_property_map<Surface_mesh::Edge_index, bool>("ecm",false).first;
// detect sharp edges of the cube
// create a remeshed version of the cube with many elements
PMP::isotropic_remeshing(faces(sm), 0.1, sm, CGAL::parameters::edge_is_constrained_map(ecm));
CGAL::IO::write_polygon_mesh("cube_remeshed.off", sm, CGAL::parameters::stream_precision(17));
assert(faces(sm).size()>100);
// decimate the mesh
Surface_mesh out;
CGAL::IO::write_polygon_mesh("cube_decimated.off", out, CGAL::parameters::stream_precision(17));
// we should be back to 12 faces
std::cout << "Output mesh has " << faces(out).size() << " faces" << std::endl;
assert(faces(out).size()==12);
return EXIT_SUCCESS;
}