PhotonSmearer.h

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// PhotonSmearer class
//
// Implements smearing for photons a la 
//
// Namespace Atlfast::
//
//--------------------------------------------------------------
//
// PhotonSmearer replicates the smearing code of ATLFAST++'s
// PhotonMaker. It provides the smear() method defined
// in the ISmearer interface. It privately inherits from
// the DefaultSmearer class to use its implementation of
// random number services etc.
//
// Authors: H.T.Phillips, P. Clarke, E. Richter-Was, P. Sherwood, R. Steward
//

#ifndef ATLFAST_PHOTONSMEARER_H
#define ATLFAST_PHOTONSMEARER_H


#include "AtlfastAlgs/ISmearer.h"
#include "AtlfastAlgs/DefaultSmearer.h"

#include "GaudiKernel/MsgStream.h"

#include "CLHEP/Vector/LorentzVector.h"

namespace Atlfast {
  class PhotonSmearer : virtual public ISmearer, 
                        virtual private DefaultSmearer 
    {
    public:
      //--------------------------------------------------------------------------
      // constructors and destructors- we can leave everything to DefaultSmearer
      //--------------------------------------------------------------------------
      PhotonSmearer(const int aseed, const int lumi, MsgStream& log) : 
        ISmearer(), DefaultSmearer(aseed), m_lumi(lumi), m_log(log){}
      virtual ~PhotonSmearer() { }

      //--------------------------------------------------------------------------
      // the only thing we actually need to provide is the smear() method
      //--------------------------------------------------------------------------
      virtual HepLorentzVector smear(const HepMC::GenParticle&);
      virtual HepLorentzVector smear(const HepLorentzVector& avec);

      virtual int setSmearParameters( const std::vector<double>& smearValues );
      virtual int setSmearParamSchema( const int smearSchema );

    private:
      //--------------------------------------------------------------------------
      // luminosity option. Currently using an int with 1= low lumi
      // 2 = high lumi. This is not very pleasant, but leave for now
      //--------------------------------------------------------------------------
      int m_lumi;
      //cw - defines the smear parameters and the schema
      std::vector<double> m_smearParams;
      int m_smearParamSchema;
      MsgStream& m_log;
      
    };

} // end of namespace bracket

#endif

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