std::cout << "\n\n" << std::endl;
std::cout << "X spacing " << f->GetXSpacing() << std::endl;
std::cout << "Y spacing " << f->GetYSpacing() << std::endl;
std::cout << "Z spacing " << f->GetZSpacing() << std::endl;
std::cout << "\n\n" << std::endl;
std::cout << "X spacing " << f->GetXSpacing() << std::endl;
std::cout << "Y spacing " << f->GetYSpacing() << std::endl;
std::cout << "Z spacing " << f->GetZSpacing() << std::endl;