ClusterSequenceAreaBase.hh

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//STARTHEADER
// $Id: ClusterSequenceAreaBase.hh 958 2007-11-28 17:43:48Z cacciari $
//
// Copyright (c) 2005-2006, Matteo Cacciari and Gavin Salam
//
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// This file is part of FastJet.
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#ifndef __FASTJET_CLUSTERSEQUENCEAREABASE_HH__
#define __FASTJET_CLUSTERSEQUENCEAREABASE_HH__

#include "fastjet/ClusterSequence.hh"
#include "fastjet/internal/LimitedWarning.hh"
#include "fastjet/RangeDefinition.hh"

FASTJET_BEGIN_NAMESPACE

class ClusterSequenceAreaBase : public ClusterSequence {
public:
  
  template<class L> ClusterSequenceAreaBase
         (const std::vector<L> & pseudojets, 
          const JetDefinition & jet_def,
          const bool & writeout_combinations = false) :
           ClusterSequence(pseudojets, jet_def, writeout_combinations) {}


  ClusterSequenceAreaBase() {}


  virtual ~ClusterSequenceAreaBase() {}


  virtual double area       (const PseudoJet & jet) const {return 0.0;}

  virtual double area_error (const PseudoJet & jet) const {return 0.0;}

  virtual PseudoJet area_4vector(const PseudoJet & jet) const {
    return PseudoJet(0.0,0.0,0.0,0.0);}

  virtual bool is_pure_ghost(const PseudoJet & jet) const {
    return false;
  }

  virtual double empty_area(const RangeDefinition & range) const;

  virtual double n_empty_jets(const RangeDefinition & range) const {
    double R = jet_def().R();
    return empty_area(range)/(0.55*pi*R*R);
  }

  double median_pt_per_unit_area(const RangeDefinition & range) const;

  double median_pt_per_unit_area_4vector(const RangeDefinition & range) const;
  
  double median_pt_per_unit_something(
                    const RangeDefinition & range, bool use_area_4vector) const;

  virtual void get_median_rho_and_sigma(const RangeDefinition & range, 
                                        bool use_area_4vector,
                                        double & median, double & sigma,
                                        double & mean_area) const;

  void get_median_rho_and_sigma(const RangeDefinition & range, 
                                bool use_area_4vector,
                                double & median, double & sigma) const {
    double mean_area;
    get_median_rho_and_sigma(range,  use_area_4vector,
                             median,  sigma, mean_area);
  }
  

  virtual void parabolic_pt_per_unit_area(double & a, double & b, 
                                          const RangeDefinition & range, 
                                          double exclude_above=-1.0, 
                                          bool use_area_4vector=false) const;


  std::vector<PseudoJet> subtracted_jets(const double rho,
                                         const double ptmin=0.0) const;

  std::vector<PseudoJet> subtracted_jets(const RangeDefinition & range, 
                                         const double ptmin=0.0) const;

  PseudoJet subtracted_jet(const PseudoJet & jet,
                           const double rho) const;

  PseudoJet subtracted_jet(const PseudoJet & jet,
                           const RangeDefinition & range) const;

  double subtracted_pt(const PseudoJet & jet,
                       const double rho,
                       bool use_area_4vector=false) const;

  double subtracted_pt(const PseudoJet & jet,
                       const RangeDefinition & range,
                       bool use_area_4vector=false) const;


private:
  static LimitedWarning _warnings;

  void _check_jet_alg_good_for_median() const;
  
};



FASTJET_END_NAMESPACE

#endif // __FASTJET_CLUSTERSEQUENCEAREABASE_HH__

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