| 1 | #ifndef D0RunIIconeJets_CONESPLITMERGE
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| 2 | #define D0RunIIconeJets_CONESPLITMERGE
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| 3 | // ---------------------------------------------------------------------------
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| 4 | // ConeSplitMerge.hpp
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| 5 | //
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| 6 | // Created: 28-JUL-2000 Francois Touze
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| 7 | //
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| 8 | // Purpose: Implements the pT ordered jet split/merge algorithm for the
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| 9 | // Improved Legacy Cone Algorithm split/merge algo.
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| 10 | //
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| 11 | // Modified:
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| 12 | // 31-JUL-2000 Laurent Duflot
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| 13 | // + introduce support for additional informations (ConeJetInfo)
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| 14 | // 1-AUG-2000 Laurent Duflot
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| 15 | // + jet merge criteria was wrong, now calculate shared_ET and compare to
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| 16 | // neighbour jet pT.
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| 17 | // + split was incomplete: shared items not really removed from jets.
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| 18 | // 4-Aug-2000 Laurent Duflot
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| 19 | // + use item methods y() and phi() rather than p4vec() and then P2y and
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| 20 | // P2phi
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| 21 | // 7-Aug-2000 Laurent Duflot
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| 22 | // + force the list to be organized by decreasing ET and, for identical ET,
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| 23 | // by decreasing seedET. Identical protojets can be found by eg nearby
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| 24 | // seeds. The seedET ordering is such that for identical jets, the one
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| 25 | // with the highest seedET is kept, which is what we want for efficiency
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| 26 | // calculations.
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| 27 | // + avoid unecessary copies of lists by using reference when possible
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| 28 | // 9-Aug-2000 Laurent Duflot
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| 29 | // + save initial jet ET before split/merge
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| 30 | // 1-May-2007 Lars Sonnenschein
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| 31 | // extracted from D0 software framework and modified to remove subsequent dependencies
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| 32 | //
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| 33 | //
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| 34 | // This file is distributed with FastJet under the terms of the GNU
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| 35 | // General Public License (v2). Permission to do so has been granted
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| 36 | // by Lars Sonnenschein and the D0 collaboration (see COPYING for
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| 37 | // details)
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| 38 | //
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| 39 | // History of changes in FastJet compared tothe original version of
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| 40 | // ConeSplitMerge.hpp
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| 41 | //
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| 42 | // 2011-12-13 Gregory Soyez <soyez@fastjet.fr>
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| 43 | //
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| 44 | // * added license information
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| 45 | //
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| 46 | // 2009-01-17 Gregory Soyez <soyez@fastjet.fr>
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| 47 | //
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| 48 | // * put the code in the fastjet::d0 namespace
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| 49 | //
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| 50 | // 2007-12-14 Gavin Salam <salam@lpthe.jussieu.fr>
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| 51 | //
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| 52 | // * replaced make_pair by std::make_pair
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| 53 | //
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| 54 | // ---------------------------------------------------------------------------
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| 55 |
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| 56 |
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| 57 | #include <iostream>
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| 58 | #include <map>
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| 59 | #include <utility>
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| 60 | #include <vector>
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| 61 | #include "ProtoJet.hpp"
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| 62 |
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| 63 | //using namespace D0RunIIconeJets_CONEJETINFO;
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| 64 |
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| 65 | #include <fastjet/internal/base.hh>
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| 66 |
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| 67 | FASTJET_BEGIN_NAMESPACE
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| 68 |
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| 69 | namespace d0{
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| 70 |
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| 71 | //
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| 72 | // this class is used to order ProtoJets by decreasing ET and seed ET
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| 73 | template <class Item>
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| 74 | class ProtoJet_ET_seedET_order
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| 75 | {
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| 76 | public:
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| 77 | bool operator()(const ProtoJet<Item> & first, const ProtoJet<Item> & second) const
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| 78 | {
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| 79 | if ( first.pT() > second.pT() ) return true;
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| 80 | else
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| 81 | if ( first.pT() < second.pT() ) return false;
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| 82 | else return ( first.info().seedET() > second.info().seedET() );
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| 83 | }
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| 84 | };
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| 85 |
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| 86 |
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| 87 | template <class Item>
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| 88 | class ConeSplitMerge {
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| 89 |
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| 90 | public :
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| 91 |
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| 92 | typedef std::multimap<ProtoJet<Item>,float,ProtoJet_ET_seedET_order<Item> > PJMMAP;
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| 93 |
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| 94 | ConeSplitMerge();
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| 95 | ConeSplitMerge(const std::vector<ProtoJet<Item> >& jvector);
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| 96 | ConeSplitMerge(const std::list<ProtoJet<Item> >& jlist);
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| 97 | ~ConeSplitMerge() {;}
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| 98 | void split_merge(std::vector<ProtoJet<Item> >& ecv,float s, float pT_min_leading_protojet, float pT_min_second_protojet, int MergeMax, float pT_min_noMergeMax);
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| 99 |
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| 100 | private :
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| 101 | PJMMAP _members;
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| 102 | };
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| 103 | ///////////////////////////////////////////////////////////////////////////////
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| 104 | template<class Item>
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| 105 | ConeSplitMerge<Item>::ConeSplitMerge():_members() {;}
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| 106 |
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| 107 | template<class Item>
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| 108 | ConeSplitMerge<Item>::ConeSplitMerge(const std::vector<ProtoJet<Item> >& jvector)
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| 109 | {
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| 110 | // sort proto_jets in Et descending order
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| 111 | typename std::vector<ProtoJet<Item> >::const_iterator jt;
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| 112 | for(jt = jvector.begin(); jt != jvector.end(); ++jt)
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| 113 | {
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| 114 | // this is supposed to be a stable cone, declare so
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| 115 | ProtoJet<Item> jet(*jt);
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| 116 | jet.NowStable();
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| 117 | _members.insert(std::make_pair(jet,jet.pT()));
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| 118 | }
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| 119 | }
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| 120 |
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| 121 | template<class Item>
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| 122 | ConeSplitMerge<Item>::ConeSplitMerge(const std::list<ProtoJet<Item> >& jlist)
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| 123 | {
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| 124 | //_max_nb_items =-1;
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| 125 | // sort proto_jets in Et descending order
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| 126 | typename std::list<ProtoJet<Item> >::const_iterator jt;
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| 127 | for(jt = jlist.begin(); jt != jlist.end(); ++jt)
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| 128 | {
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| 129 | // this is supposed to be a stable cone, declare so
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| 130 | ProtoJet<Item> jet(*jt);
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| 131 | jet.NowStable();
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| 132 | _members.insert(std::make_pair(jet,jet.pT()));
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| 133 | }
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| 134 | }
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| 135 |
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| 136 | template<class Item>
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| 137 | void ConeSplitMerge<Item>::split_merge(std::vector<ProtoJet<Item> >& jcv,
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| 138 | float shared_ET_fraction,
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| 139 | float pT_min_leading_protojet, float pT_min_second_protojet,
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| 140 | int MergeMax, float pT_min_noMergeMax)
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| 141 | {
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| 142 | while(!_members.empty())
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| 143 | {
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| 144 | /*
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| 145 | {
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| 146 | std::cout << std::endl;
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| 147 | std::cout << " --------------- list of protojets ------------------ " <<std::endl;
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| 148 | for ( PJMMAP::iterator it = _members.begin();
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| 149 | it != _members.end(); ++it)
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| 150 | {
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| 151 | std::cout << " pT y phi " << (*it).pT() << " " << (*it).y() << " " << (*it).phi() << " " << (*it).info().seedET() << " " << (*it).info().nbMerge() << " " << (*it).info().nbSplit() << std::endl;
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| 152 | }
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| 153 | std::cout << " ----------------------------------------------------- " <<std::endl;
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| 154 | }
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| 155 | */
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| 156 |
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| 157 |
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| 158 | // select highest Et jet
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| 159 | typename PJMMAP::iterator itmax= _members.begin();
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| 160 | ProtoJet<Item> imax((*itmax).first);
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| 161 | const std::list<const Item*>& ilist(imax.LItems());
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| 162 |
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| 163 | _members.erase(itmax);
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| 164 |
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| 165 | // does jet share items?
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| 166 | bool share= false;
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| 167 | float shared_ET = 0.;
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| 168 | typename PJMMAP::iterator jtmax;
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| 169 | typename PJMMAP::iterator jt;
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| 170 | for(jt = _members.begin(); jt != _members.end(); ++jt)
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| 171 | {
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| 172 | const std::list<const Item*>& jlist((*jt).first.LItems());
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| 173 | typename std::list<const Item*>::const_iterator tk;
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| 174 | int count;
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| 175 | for(tk = ilist.begin(), count = 0; tk != ilist.end();
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| 176 | ++tk, ++count)
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| 177 | {
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| 178 | typename std::list<const Item*>::const_iterator where=
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| 179 | find(jlist.begin(),jlist.end(),*tk);
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| 180 | if(where != jlist.end())
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| 181 | {
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| 182 | share= true;
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| 183 | shared_ET += (*tk)->pT();
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| 184 | }
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| 185 | }
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| 186 | if(share)
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| 187 | {
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| 188 | jtmax = jt;
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| 189 | break;
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| 190 | }
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| 191 | }
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| 192 |
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| 193 | if(!share) {
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| 194 | // add jet to the final jet list
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| 195 | jcv.push_back(imax);
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| 196 | //std::cout << " final jet " << imax.pT() << " "<< imax.info().nbMerge() << " " << imax.info().nbSplit() << std::endl;
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| 197 | }
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| 198 | else
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| 199 | {
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| 200 | // find highest Et neighbor
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| 201 | ProtoJet<Item> jmax((*jtmax).first);
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| 202 |
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| 203 | // drop neighbor
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| 204 | _members.erase(jtmax);
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| 205 |
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| 206 |
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| 207 | //std::cout << " split or merge ? " << imax.pT() << " " << shared_ET << " " << jmax.pT() << " " << s << " " << (jmax.pT())*s << std::endl;
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| 208 |
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| 209 | // merge
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| 210 | if( shared_ET > (jmax.pT())*shared_ET_fraction
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| 211 | && (imax.pT() > pT_min_leading_protojet || jmax.pT() > pT_min_second_protojet)
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| 212 | && (imax.info().nbMerge() < MergeMax || imax.pT() > pT_min_noMergeMax))
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| 213 | {
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| 214 | // add neighbor's items to imax
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| 215 | const std::list<const Item*>& jlist(jmax.LItems());
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| 216 | typename std::list<const Item*>::const_iterator tk;
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| 217 | typename std::list<const Item*>::const_iterator iend= ilist.end();
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| 218 | bool same = true; // is jmax just the same as imax ?
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| 219 | for(tk = jlist.begin(); tk != jlist.end(); ++tk)
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| 220 | {
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| 221 | typename std::list<const Item*>::const_iterator where=
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| 222 | find(ilist.begin(),iend,*tk);
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| 223 | if(where == iend)
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| 224 | {
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| 225 | imax.addItem(*tk);
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| 226 | same = false;
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| 227 | }
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| 228 | }
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| 229 | if ( ! same )
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| 230 | {
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| 231 | // recalculate
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| 232 | //float old_pT = imax.pT();
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| 233 |
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| 234 | imax.updateJet();
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| 235 | imax.merged();
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| 236 | //std::cout << " jet merge :: " << old_pT << " " << jmax.pT() << " " << imax.pT() << " "<< imax.info().nbMerge() << " " << imax.info().nbSplit() << std::endl;
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| 237 | }
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| 238 | }
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| 239 |
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| 240 | //split and assign removed shared cells from lowest pT protojet
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| 241 | else if(shared_ET > (jmax.pT())*shared_ET_fraction)
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| 242 | {
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| 243 | // here we need to pull the lists, because there are items to remove
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| 244 | std::list<const Item*> ilist(imax.LItems());
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| 245 | std::list<const Item*> jlist(jmax.LItems());
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| 246 |
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| 247 | typename std::list<const Item*>::iterator tk;
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| 248 | for(tk = jlist.begin(); tk != jlist.end(); )
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| 249 | {
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| 250 | typename std::list<const Item*>::iterator where=
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| 251 | find(ilist.begin(),ilist.end(),*tk);
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| 252 | if(where != ilist.end()) {
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| 253 | tk = jlist.erase(tk);
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| 254 | }
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| 255 | else ++tk;
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| 256 | }
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| 257 |
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| 258 | jmax.erase();
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| 259 |
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| 260 | for ( typename std::list<const Item*>::const_iterator it = jlist.begin();
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| 261 | it != jlist.end(); ++it) jmax.addItem(*it);
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| 262 |
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| 263 | // recalculated jet quantities
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| 264 | jmax.updateJet();
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| 265 | jmax.splitted();
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| 266 | //std::cout << " jet split 1 :: " << jmax.pT() << " "<< jmax.info().nbMerge() << " " << jmax.info().nbSplit() << std::endl;
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| 267 | _members.insert(std::make_pair(jmax,jmax.pT()));
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| 268 | }
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| 269 |
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| 270 | // split and assign shared cells to nearest protojet
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| 271 | else
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| 272 | {
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| 273 | // here we need to pull the lists, because there are items to remove
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| 274 | std::list<const Item*> ilist(imax.LItems());
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| 275 | std::list<const Item*> jlist(jmax.LItems());
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| 276 |
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| 277 | typename std::list<const Item*>::iterator tk;
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| 278 | for(tk = jlist.begin(); tk != jlist.end(); )
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| 279 | {
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| 280 | typename std::list<const Item*>::iterator where=
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| 281 | find(ilist.begin(),ilist.end(),*tk);
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| 282 | if(where != ilist.end()) {
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| 283 | float yk = (*tk)->y();
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| 284 | float phik = (*tk)->phi();
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| 285 | float di= RD2(imax.y(),imax.phi(),yk,phik);
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| 286 | float dj= RD2(jmax.y(),jmax.phi(),yk,phik);
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| 287 | if(dj > di)
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| 288 | {
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| 289 | tk = jlist.erase(tk);
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| 290 | //std::cout << " shared item " << (*tk)->pT() << " removed from neighbour jet " << std::endl;
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| 291 | }
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| 292 | else
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| 293 | {
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| 294 | ilist.erase(where);
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| 295 | ++tk;
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| 296 | //std::cout << " shared item " << (*tk)->pT() << " removed from leading jet " << std::endl;
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| 297 | }
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| 298 | }
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| 299 | else ++tk;
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| 300 | }
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| 301 | // recalculate jets imax and jmax
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| 302 |
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| 303 | // first erase all items
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| 304 | imax.erase();
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| 305 | // put items that are left
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| 306 | for ( typename std::list<const Item*>::const_iterator it = ilist.begin();
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| 307 | it != ilist.end(); ++it) imax.addItem(*it);
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| 308 | // recalculated jet quantities
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| 309 | imax.updateJet();
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| 310 | imax.splitted();
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| 311 | //std::cout << " jet split 2 :: " << imax.pT() << " "<< imax.info().nbMerge() << " " << imax.info().nbSplit() << std::endl;
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| 312 |
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| 313 |
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| 314 | // first erase all items
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| 315 | jmax.erase();
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| 316 | // put items that are left
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| 317 | for ( typename std::list<const Item*>::const_iterator it = jlist.begin();
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| 318 | it != jlist.end(); ++it) jmax.addItem(*it);
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| 319 | // recalculated jet quantities
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| 320 | jmax.updateJet();
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| 321 | jmax.splitted();
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| 322 | //std::cout << " jet split " << jmax.pT() << " "<< jmax.info().nbMerge() << " " << jmax.info().nbSplit() << std::endl;
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| 323 |
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| 324 | _members.insert(std::make_pair(jmax,jmax.pT()));
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| 325 | }
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| 326 | _members.insert(std::make_pair(imax,imax.pT()));
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| 327 | }
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| 328 | } // while
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| 329 | }
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| 330 | ///////////////////////////////////////////////////////////////////////////////
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| 331 |
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| 332 | } // namespace d0
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| 333 |
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| 334 | FASTJET_END_NAMESPACE
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| 335 |
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| 336 | #endif
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