SimpleTrackSmearer.h

#ifndef SimpleTrackSmearer_h
#define SimpleTrackSmearer_h 1

#ifdef USE_CLHEP  // only if CLHEP is available !

#include "marlin/IFourVectorSmearer.h"
#include <vector>

#define ELECTRON_MASS 0.0005109989 
#define MUON_MASS     0.10565836 
#define PION_MASS     0.139570 

namespace marlin{

  struct TrackResolution {

    TrackResolution() :
      DPP(0.) ,
      ThMin(0.) ,
      ThMax(0.) {}

    TrackResolution(float dPP, float thMin, float thMax) :
      DPP(dPP) ,
      ThMin(thMin) ,
      ThMax(thMax) {}
    
    float DPP ;
    float ThMin ;
    float ThMax ;

  } ;
  

  class SimpleTrackSmearer : public IFourVectorSmearer {
    
    typedef std::vector<TrackResolution> ResVec ;

  public:
    
    SimpleTrackSmearer(const std::vector<float>& resVec ) ;
    
    
    virtual ~SimpleTrackSmearer() {} 
    
    virtual HepLorentzVector smearedFourVector( const HepLorentzVector& v, int pdgCode ) ;
    
  protected:

    ResVec _resVec ;

  } ;
  


} // end namespace 

#endif // ifdef CLHEP  
#endif

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