TilingExtent.hh

#ifndef __FASTJET_TILINGEXTENT_HH__
#define __FASTJET_TILINGEXTENT_HH__
 
#include "fastjet/ClusterSequence.hh"
 
//FJSTARTHEADER
// $Id$
//
// Copyright (c) 2005-2023, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
//
//----------------------------------------------------------------------
// This file is part of FastJet.
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FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
 
//----------------------------------------------------------------------
/// class to perform a fast analysis of the appropriate rapidity range
/// in which to perform tiling
class TilingExtent {
public:
  /// constructor that takes a ClusterSequence in a state where the
  /// initial particles have been set up, but before clustering has
  /// started.
  TilingExtent(ClusterSequence & cs);
 
  /// constructor that takes a list of PseudoJets
  TilingExtent(const std::vector<PseudoJet> &particles);
 
  /// returns the suggested minimum rapidity for the tiling
  double minrap() const {return _minrap;}
  /// returns the suggested maximum rapidity for the tiling
  double maxrap() const {return _maxrap;}
 
  /// internally, the class bins the particle multiplicity versus
  /// rapidity, in bins of size 1 running roughly from minrap to maxrap
  /// (including overflows); this function returns the sum of squares
  /// of bin contents, which may be informative for deciding strategy
  /// choices.
  double sum_of_binned_squared_multiplicity() const {return _cumul2;}
 
private:
  double _minrap, _maxrap, _cumul2;
 
  /// attempts to calculate a sensible rapidity extent for the tiling
  void _determine_rapidity_extent(const std::vector<PseudoJet> & particles);
};
 
FASTJET_END_NAMESPACE      // defined in fastjet/internal/base.hh
 
#endif // __FASTJET_TILINGEXTENT_HH__