\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.12.2 - Scale-Space Surface Reconstruction
Scale_space_reconstruction_3/scale_space_advancing_front.cpp
#include <fstream>
#include <iostream>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Point_set_3.h>
#include <CGAL/Point_set_3/IO.h>
#include <CGAL/Scale_space_surface_reconstruction_3.h>
#include <CGAL/Scale_space_reconstruction_3/Advancing_front_mesher.h>
#include <CGAL/Scale_space_reconstruction_3/Jet_smoother.h>
#include <CGAL/IO/read_off_points.h>
#include <CGAL/Timer.h>
typedef Kernel::Point_3 Point;
typedef CGAL::Point_set_3<Point> Point_set;
typedef Reconstruction::Facet_const_iterator Facet_iterator;
int main(int argc, char** argv)
{
if (argc!=2){
std::cerr << "Error, no input file provided\n";
return 1;
}
// Read the data.
Point_set points;
std::ifstream in(argv[1]);
std::cerr << "Reading " << std::flush;
in >> points;
if (points.empty())
{
std::cerr << "Error: cannot read file" << std::endl;
return EXIT_FAILURE;
}
std::cerr << "done: " << points.size() << " points." << std::endl;
std::cerr << "Reconstruction ";
CGAL::Timer t;
t.start();
// Construct the mesh in a scale space.
Reconstruction reconstruct (points.points().begin(), points.points().end());
reconstruct.increase_scale<Smoother> (4);
reconstruct.reconstruct_surface (Mesher (0.5));
std::cerr << "done in " << t.time() << " sec." << std::endl;
t.reset();
std::ofstream out ("out.off");
out << "OFF" << std::endl << points.size() << " " << reconstruct.number_of_facets() << " 0" << std::endl;
for (Point_set::iterator it = points.begin(); it != points.end(); ++ it)
out << points.point(*it) << std::endl;
for (Reconstruction::Facet_iterator it = reconstruct.facets_begin();
it != reconstruct.facets_end(); ++ it)
out << "3 " << (*it)[0] << " " << (*it)[1] << " " << (*it)[2] << std::endl;
std::cerr << "Writing result in " << t.time() << " sec." << std::endl;
std::cerr << "Done." << std::endl;
return EXIT_SUCCESS;
}