I4Momentum.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef EVENTKERNEL_I4MOMENTUM_H
#define EVENTKERNEL_I4MOMENTUM_H 1
 
// STL includes
#include <ostream>
 
#include "CLHEP/Vector/LorentzVector.h"
 
class I4MomentumError;
 
class I4Momentum 
{
 public:
  enum Kind { P4EETAPHIM, P4IPTCOTTHPHIM, P4PTETAPHIM, P4PXPYPZE, UNKNOWN };
 
 
  virtual ~I4Momentum();
  virtual double px() const = 0;
  virtual double py() const = 0 ;
  virtual double pz() const = 0 ;
  virtual double m() const = 0 ;
  virtual double m2() const = 0 ;
  virtual double p() const = 0 ;
  virtual double p2() const = 0 ;
  virtual double eta() const = 0 ;
  virtual double rapidity() const = 0 ;
  virtual double phi() const = 0 ;
  virtual double e() const = 0 ;
  virtual double et() const = 0 ;   
  virtual double pt() const = 0 ;
  virtual double iPt() const = 0;
  virtual double cosPhi() const = 0 ;
  virtual double sinPhi() const = 0 ;
  virtual double cosTh() const = 0 ;
  virtual double sinTh() const = 0 ;
  virtual double cotTh() const = 0 ;
  virtual double tanTh() const = 0 ;
  virtual CLHEP::HepLorentzVector hlv() const = 0 ;
 
  virtual const I4MomentumError* errors() const = 0;
 
  virtual Kind kind() const = 0;
 
 
  virtual void set4Mom (const I4Momentum * const theI4Mom ) = 0;
 
  virtual void set4Mom (const I4Momentum & theI4Mom) = 0;
 
  virtual void set4Mom (const CLHEP::HepLorentzVector & theHlv ) = 0;
 
 
  virtual std::ostream& dump( std::ostream& out ) const = 0;
 
};
 
std::ostream& operator<<( std::ostream& out, const I4Momentum& p4 );
 
inline std::ostream& operator<<( std::ostream& out, const I4Momentum& p4 )
{
  return p4.dump( out );
}
 
// MsgStream& operator<<( MsgStream& msg, const I4Momentum& p4 );
// inline MsgStream& operator<<( MsgStream& msg, const I4Momentum& p4 )
// {
//  std::stringstream out;
//  p4.dump( out );
//  msg << out.str();
//  return msg;
// }
 
#endif