/usr/include/HepMC/Units.h is in libhepmc-dev 2.06.09-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #ifndef HEPMC_UNITS_H
#define HEPMC_UNITS_H
//--------------------------------------------------------------------------
// Units.h
// Author: A. Buckley, D. Grellscheid
//
// units used by a GenEvent
// The default units are set by a configure switch at compile time in Units.cc.
//--------------------------------------------------------------------------
#include <iostream>
#include <string>
namespace HepMC {
///
/// \namespace Units
/// Allow units to be specified within HepMC.
/// The default units are set at compile time.
///
namespace Units {
// Convention: if both types are passed, MomentumUnit always goes first.
enum MomentumUnit { MEV, GEV }; //!< momentum units
enum LengthUnit { MM, CM }; //!< position units
LengthUnit default_length_unit(); //!< default unit is defined by configure
MomentumUnit default_momentum_unit(); //!< default unit is defined by configure
// helper functions
std::string name( MomentumUnit ); //!< convert enum to string
std::string name( LengthUnit ); //!< convert enum to string
/// scaling factor relative to MeV
double conversion_factor( MomentumUnit from, MomentumUnit to );
double conversion_factor( LengthUnit from, LengthUnit to );
} // Units
} // HepMC
#endif // HEPMC_UNITS_H
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