CGAL 5.2.1 - Polygonal Surface Reconstruction
Polygonal_surface_reconstruction/polyfit_example_user_provided_planes.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/IO/Writer_OFF.h>
#include <CGAL/IO/read_ply_points.h>
#include <CGAL/property_map.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Polygonal_surface_reconstruction.h>
#ifdef CGAL_USE_SCIP // defined (or not) by CMake scripts, do not define by hand
#include <CGAL/SCIP_mixed_integer_program_traits.h>
#elif defined(CGAL_USE_GLPK) // defined (or not) by CMake scripts, do not define by hand
#include <CGAL/GLPK_mixed_integer_program_traits.h>
#endif
#if defined(CGAL_USE_GLPK) || defined(CGAL_USE_SCIP)
#include <CGAL/Timer.h>
#include <fstream>
typedef Kernel::Point_3 Point;
typedef Kernel::Vector_3 Vector;
typedef CGAL::Polygonal_surface_reconstruction<Kernel> Polygonal_surface_reconstruction;
typedef CGAL::Surface_mesh<Point> Surface_mesh;
// Point with normal, and plane index
typedef boost::tuple<Point, Vector, int> PNI;
typedef CGAL::Nth_of_tuple_property_map<0, PNI> Point_map;
typedef CGAL::Nth_of_tuple_property_map<1, PNI> Normal_map;
typedef CGAL::Nth_of_tuple_property_map<2, PNI> Plane_index_map;
/*
* The following example shows the reconstruction using user-provided
* planar segments stored in PLY format. In the PLY format, a property
* named "segment_index" stores the plane index for each point (-1 if
* the point is not assigned to a plane).
*/
int main()
{
const std::string& input_file("data/ball.ply");
std::ifstream input_stream(input_file.c_str());
std::vector<PNI> points; // store points
std::cout << "Loading point cloud: " << input_file << "...";
CGAL::Timer t;
t.start();
if (!input_stream ||
input_stream,
std::back_inserter(points),
std::make_pair(Plane_index_map(), CGAL::PLY_property<int>("segment_index"))))
{
std::cerr << "Error: cannot read file " << input_file << std::endl;
return EXIT_FAILURE;
}
else
std::cout << " Done. " << points.size() << " points. Time: " << t.time() << " sec." << std::endl;
std::cout << "Generating candidate faces...";
t.reset();
Polygonal_surface_reconstruction algo(
points,
Point_map(),
Normal_map(),
Plane_index_map()
);
std::cout << " Done. Time: " << t.time() << " sec." << std::endl;
Surface_mesh model;
std::cout << "Reconstructing...";
t.reset();
if (!algo.reconstruct<MIP_Solver>(model)) {
std::cerr << " Failed: " << algo.error_message() << std::endl;
return EXIT_FAILURE;
}
// Saves the mesh model
const std::string& output_file("data/ball_result.off");
std::ofstream output_stream(output_file.c_str());
if (output_stream && CGAL::write_off(output_stream, model)) {
// flush the buffer
output_stream << std::flush;
std::cout << " Done. Saved to " << output_file << ". Time: " << t.time() << " sec." << std::endl;
}
else {
std::cerr << " Failed saving file." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
#else
int main(int, char**)
{
std::cerr << "This test requires either GLPK or SCIP.\n";
return EXIT_SUCCESS;
}
#endif // defined(CGAL_USE_GLPK) || defined(CGAL_USE_SCIP)