ClusterSequenceArea.hh

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//STARTHEADER
// $Id: ClusterSequenceArea.hh 957 2007-11-22 18:58:45Z salam $
//
// Copyright (c) 2006-2007, Matteo Cacciari, Gavin Salam and Gregory Soyez
//
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// This file is part of FastJet.
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#ifndef __FASTJET_CLUSTERSEQUENCEAREA_HH__
#define __FASTJET_CLUSTERSEQUENCEAREA_HH__

#include "fastjet/ClusterSequenceAreaBase.hh"
#include "fastjet/ClusterSequenceActiveArea.hh"
#include "fastjet/ClusterSequenceActiveAreaExplicitGhosts.hh"
#include "fastjet/ClusterSequencePassiveArea.hh"
#include "fastjet/ClusterSequenceVoronoiArea.hh"
#include "fastjet/AreaDefinition.hh"

FASTJET_BEGIN_NAMESPACE

class ClusterSequenceArea : public ClusterSequenceAreaBase {
public:
  template<class L> ClusterSequenceArea
         (const std::vector<L> & pseudojets, 
          const JetDefinition & jet_def,
          const AreaDefinition & area_def_in)  : _area_def(area_def_in) {
    initialize_and_run_cswa(pseudojets, jet_def);
  }

  template<class L> ClusterSequenceArea
         (const std::vector<L> & pseudojets, 
          const JetDefinition & jet_def,
          const GhostedAreaSpec & area_spec)   : _area_def(area_spec){
    initialize_and_run_cswa(pseudojets, jet_def);
  }

  template<class L> ClusterSequenceArea
         (const std::vector<L> & pseudojets, 
          const JetDefinition & jet_def,
          const VoronoiAreaSpec & area_spec)   : _area_def(area_spec){
    initialize_and_run_cswa(pseudojets, jet_def);
  }

  const AreaDefinition & area_def() const {return _area_def;}


  virtual double area       (const PseudoJet & jet) const {
    return _area_base->area(jet);}

  virtual double area_error (const PseudoJet & jet) const {
    return _area_base->area_error(jet);}

  virtual PseudoJet area_4vector(const PseudoJet & jet) const {
    return _area_base->area_4vector(jet);}

  // /// return the total area, up to |y|<maxrap, that is free of jets
  // virtual double empty_area(double maxrap) const {
  //   return _area_base->empty_area(maxrap);}
  // 
  // /// return something similar to the number of pure ghost jets
  // /// in the given rapidity range in an active area case.
  // /// For the local implementation we return empty_area/(0.55 pi R^2),
  // /// based on measured properties of ghost jets with kt and cam. Note
  // /// that the number returned is a double.
  // virtual double n_empty_jets(double maxrap) const {
  //   return _area_base->n_empty_jets(maxrap);

  virtual double empty_area(const RangeDefinition & range) const {
    return _area_base->empty_area(range);}

  virtual double n_empty_jets(const RangeDefinition & range) const {
    return _area_base->n_empty_jets(range);
  }

  virtual bool is_pure_ghost(const PseudoJet & jet) const {
    return _area_base->is_pure_ghost(jet);
  }

  virtual void get_median_rho_and_sigma(const RangeDefinition & range, 
                                        bool use_area_4vector,
                                        double & median, double & sigma,
                                        double & mean_area) const {
    _warn_if_range_unsuitable(range);
    ClusterSequenceAreaBase::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 {
    _warn_if_range_unsuitable(range);
    ClusterSequenceAreaBase::parabolic_pt_per_unit_area(
                                a,b,range, exclude_above, use_area_4vector);
  }


private:
  
  void _warn_if_range_unsuitable(const RangeDefinition & range) const;

  template<class L> void initialize_and_run_cswa (
                                 const std::vector<L> & pseudojets, 
                                 const JetDefinition & jet_def);

  std::auto_ptr<ClusterSequenceAreaBase> _area_base;
  AreaDefinition _area_def;
  static LimitedWarning _range_warnings;

};

//----------------------------------------------------------------------
template<class L> void ClusterSequenceArea::initialize_and_run_cswa(
           const std::vector<L> & pseudojets, 
           const JetDefinition  & jet_def)
 {
  
  ClusterSequenceAreaBase * _area_base_ptr;
  switch(_area_def.area_type()) {
  case active_area:
    _area_base_ptr = new ClusterSequenceActiveArea(pseudojets, 
                                                   jet_def, 
                                                   _area_def.ghost_spec());
    break;
  case active_area_explicit_ghosts:
    _area_base_ptr = new ClusterSequenceActiveAreaExplicitGhosts(pseudojets, 
                                                   jet_def, 
                                                   _area_def.ghost_spec());
    break;
  case voronoi_area:
    _area_base_ptr = new ClusterSequenceVoronoiArea(pseudojets, 
                                                   jet_def, 
                                                   _area_def.voronoi_spec());
    break;
  case one_ghost_passive_area:
    _area_base_ptr = new ClusterSequence1GhostPassiveArea(pseudojets, 
                                                    jet_def, 
                                                    _area_def.ghost_spec());
    break;
  case passive_area:
    _area_base_ptr = new ClusterSequencePassiveArea(pseudojets, 
                                                    jet_def, 
                                                    _area_def.ghost_spec());
    break;
  default:
    std::cerr << "Error: unrecognized area_type in ClusterSequenceArea:" 
              << _area_def.area_type() << std::endl;
    exit(-1);
  }
  // now copy across the information from the area base class
  _area_base = std::auto_ptr<ClusterSequenceAreaBase>(_area_base_ptr);
  transfer_from_sequence(*_area_base);
}

FASTJET_END_NAMESPACE

#endif // __FASTJET_CLUSTERSEQUENCEAREA_HH__

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