CGAL 4.7 - Scale-Space Surface Reconstruction: Scale_space_reconstruction_3/scale_space.cpp

\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.7 - Scale-Space Surface Reconstruction

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Scale_space_reconstruction_3/scale_space.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 CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Scale_space_surface_reconstruction_3< Kernel > Reconstruction;
typedef Reconstruction::Point Point;
typedef std::vector< Point > Point_collection;
typedef Reconstruction::Triple_const_iterator Triple_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.
Point_collection 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( 10, 200 );
reconstruct. reconstruct_surface( points.begin(), points.end(), 4 );
std::cerr << "Reconstruction done in " << t.time() << " sec." << std::endl;
t.reset();
std::ofstream out ("out.off");
// Write the reconstruction.
std::cerr << "Neighborhood radius^2 = " << reconstruct. neighborhood_squared_radius() << std::endl;
for( std::size_t shell = 0; shell < reconstruct. number_of_shells(); ++shell ) {
std::cerr << "Shell " << shell << std::endl;
for( Triple_iterator it = reconstruct. shell_begin( shell ); it != reconstruct. shell_end( shell ); ++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;
std::cerr << "Done." << std::endl;
return EXIT_SUCCESS;
}