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// $Id: ClusterSequencePassiveArea.hh,v 1.1 2008-11-06 14:32:08 ovyn Exp $
//
// Copyright (c) 2005-2007, Matteo Cacciari, Gavin Salam and Gregory Soyez
//
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// This file is part of FastJet.
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#ifndef __FASTJET_CLUSTERSEQUENCEPASSIVEAREA_HH__
#define __FASTJET_CLUSTERSEQUENCEPASSIVEAREA_HH__


#include "Utilities/Fastjet/include/fastjet/PseudoJet.hh"
#include "Utilities/Fastjet/include/fastjet/ClusterSequence1GhostPassiveArea.hh"
#include<iostream>
#include<vector>

FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh

//using namespace std;

/// Class that behaves essentially like ClusterSequence except
/// that it also provides access to the area of a jet (which
/// will be a random quantity... Figure out what to do about seeds 
/// later...)
class ClusterSequencePassiveArea : public ClusterSequence1GhostPassiveArea {
public:

  /// constructor based on JetDefinition and PassiveAreaSpec
  template<class L> ClusterSequencePassiveArea
         (const std::vector<L> & pseudojets, 
	  const JetDefinition & jet_def,
	  const GhostedAreaSpec & area_spec,
	  const bool & writeout_combinations = false) ;

  /// return an empty area that's appropriate to the passive area
  /// determination carried out
  virtual double empty_area(const RangeDefinition & range) const;

private:

  /// does the initialisation and running specific to the passive
  /// areas class
  void _initialise_and_run_PA (const JetDefinition & jet_def,
                               const GhostedAreaSpec & area_spec,
                               const bool & writeout_combinations = false);

};




template<class L> ClusterSequencePassiveArea::ClusterSequencePassiveArea 
(const std::vector<L> & pseudojets, 
 const JetDefinition & jet_def,
 const GhostedAreaSpec & area_spec,
 const bool & writeout_combinations) {

  // transfer the initial jets (type L) into our own array
  _transfer_input_jets(pseudojets);

  // run the clustering for passive areas
  _initialise_and_run_PA(jet_def, area_spec, writeout_combinations);

}


  
FASTJET_END_NAMESPACE

#endif // __FASTJET_CLUSTERSEQUENCEPASSIVEAREA_HH__