for(int c = 0; c < room->nb_cameras(); c++) {
pomsprintf(buffer, buffer_size, convergence_file_format, c, nb_frame, it);
cout << "Saving " << buffer << "\n"; cout.flush();
for(int c = 0; c < room->nb_cameras(); c++) {
pomsprintf(buffer, buffer_size, convergence_file_format, c, nb_frame, it);
cout << "Saving " << buffer << "\n"; cout.flush();