/data/refman/pasoursint/CMSSW_5_2_7_hltpatch1/src/PhysicsTools/Utilities/interface/Lumi3DReWeighting.h

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#ifndef PhysicsTools_Utilities_interface_Lumi3DReWeighting_h
#define PhysicsTools_Utilities_interface_Lumi3DReWeighting_h


#include "TH1.h"
#include "TFile.h"
#include <cmath>
#include <string>
#include <boost/shared_ptr.hpp>
#include <vector>



namespace edm {
  class EventBase;
  class Lumi3DReWeighting {
  public:
    Lumi3DReWeighting( std::string generatedFile,
                       std::string dataFile,
                       std::string GenHistName,
                       std::string DataHistName,
                       std::string WeightOutputFile);
    
    Lumi3DReWeighting( std::vector< float > MC_distr, std::vector< float > Lumi_distr,
                       std::string WeightOutputFile);

    Lumi3DReWeighting ( ) { } ;

    double weight3D( const edm::EventBase &e );

    double weight3D( int, int, int );

    void weight3D_set( std::string generatedFile, std::string dataFile, std::string GenHistName, std::string DataHistName, std::string WeightOutputFile);

    void weight3D_init( float Scale );

    void weight3D_init( std::string WeightFileName );  // initialize from root file

    void weight3D_init( std::string MCFileName, std::string DataFileName );  // initialize from root files


  protected:

    std::string generatedFileName_;
    std::string dataFileName_;
    std::string GenHistName_;
    std::string DataHistName_;
    std::string weightFileName_;
    boost::shared_ptr<TFile>     generatedFile_;
    boost::shared_ptr<TFile>     dataFile_;
    boost::shared_ptr<TH1>      weights_;

    //keep copies of normalized distributions:

    boost::shared_ptr<TH1>      MC_distr_;
    boost::shared_ptr<TH1>      Data_distr_;


    double Weight3D_[50][50][50];

  };
}



#endif