\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.12.2 - Scale-Space Surface Reconstruction
Scale_space_reconstruction_3/scale_space_manifold.cpp
#include <fstream>
#include <iostream>
#include <CGAL/Scale_space_surface_reconstruction_3.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/IO/read_off_points.h>
#include <CGAL/Timer.h>
typedef Reconstruction::Point Point;
typedef Reconstruction::Facet_const_iterator Facet_iterator;
typedef Mesher::Facet_const_iterator Mesher_iterator;
typedef CGAL::Timer Timer;
int main(int argc, char* argv[]) {
if (argc!=2){
std::cerr << "Error, no input file provided\n";
return 1;
}
// Read the data.
std::vector<Point> points;
std::ifstream in(argv[1]);
std::cerr << "Reading " << std::flush;
if( !in || !CGAL::read_off_points( in, std::back_inserter( points ) ) ) {
std::cerr << "Error: cannot read file" << std::endl;
return EXIT_FAILURE;
}
std::cerr << "done: " << points.size() << " points." << std::endl;
Timer t;
t.start();
// Construct the mesh in a scale space.
Reconstruction reconstruct( points.begin(), points.end() );
Smoother smoother( 10, 200 );
reconstruct.increase_scale (4, smoother);
Mesher mesher( smoother.squared_radius(),
false, // Do not separate shells
true // Force manifold output
);
reconstruct.reconstruct_surface( mesher );
std::cerr << "Reconstruction done in " << t.time() << " sec." << std::endl;
t.reset();
std::ofstream out ("out.off");
// Write the reconstruction.
for( Facet_iterator it = reconstruct.facets_begin( ); it != reconstruct.facets_end( ); ++it )
out << "3 "<< *it << '\n'; // We write a '3' in front so that it can be assembled into an OFF file
std::cerr << "Writing result in " << t.time() << " sec." << std::endl;
out.close();
t.reset();
std::ofstream garbage ("garbage.off");
// Write facets that were removed to force manifold output
for( Mesher_iterator it = mesher.garbage_begin( ); it != mesher.garbage_end( ); ++it )
garbage << "3 "<< *it << '\n'; // We write a '3' in front so that it can be assembled into an OFF file
std::cerr << "Writing garbage facets in " << t.time() << " sec." << std::endl;
garbage.close ();
std::cerr << "Done." << std::endl;
return EXIT_SUCCESS;
}