+ {
+ ofstream out_tracker("/tmp/tracker.dat");
+ tracker->write(&out_tracker);
+
+ ifstream in_tracker("/tmp/tracker.dat");
+ Tracker tracker2;
+ tracker2.read(&in_tracker);
+ tracker2.build_graph();
+ tracker2.track();
+ ofstream out_traj("/tmp/result.trj");
+ tracker2.write_trajectories(&out_traj);
+ }
+