Fork me on GitHub

source: git/external/fastjet/plugins/CDFCones/CDFJetCluPlugin.cc@ e70228d

Timing
Last change on this file since e70228d was b7b836a, checked in by Pavel Demin <pavel-demin@…>, 6 years ago

update FastJet library to 3.3.1 and FastJet Contrib library to 1.036

  • Property mode set to 100644
File size: 7.1 KB
Line 
1//FJSTARTHEADER
2// $Id: CDFJetCluPlugin.cc 4354 2018-04-22 07:12:37Z salam $
3//
4// Copyright (c) 2005-2018, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
5//
6//----------------------------------------------------------------------
7// This file is part of FastJet.
8//
9// FastJet is free software; you can redistribute it and/or modify
10// it under the terms of the GNU General Public License as published by
11// the Free Software Foundation; either version 2 of the License, or
12// (at your option) any later version.
13//
14// The algorithms that underlie FastJet have required considerable
15// development. They are described in the original FastJet paper,
16// hep-ph/0512210 and in the manual, arXiv:1111.6097. If you use
17// FastJet as part of work towards a scientific publication, please
18// quote the version you use and include a citation to the manual and
19// optionally also to hep-ph/0512210.
20//
21// FastJet is distributed in the hope that it will be useful,
22// but WITHOUT ANY WARRANTY; without even the implied warranty of
23// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24// GNU General Public License for more details.
25//
26// You should have received a copy of the GNU General Public License
27// along with FastJet. If not, see <http://www.gnu.org/licenses/>.
28//----------------------------------------------------------------------
29//FJENDHEADER
30
31#include "fastjet/CDFJetCluPlugin.hh"
32#include "fastjet/ClusterSequence.hh"
33#include <sstream>
34#include <cassert>
35
36// CDF stuff
37#include "JetCluAlgorithm.hh"
38#include "PhysicsTower.hh"
39#include "Cluster.hh"
40
41FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
42
43using namespace std;
44using namespace cdf;
45
46bool CDFJetCluPlugin::_first_time = true;
47
48string CDFJetCluPlugin::description () const {
49 ostringstream desc;
50
51 desc << "CDF JetClu jet algorithm with "
52 << "seed_threshold = " << seed_threshold () << ", "
53 << "cone_radius = " << cone_radius () << ", "
54 << "adjacency_cut = " << adjacency_cut () << ", "
55 << "max_iterations = " << max_iterations () << ", "
56 << "iratch = " << iratch () << ", "
57 << "overlap_threshold = " << overlap_threshold () ;
58
59 return desc.str();
60}
61
62
63void CDFJetCluPlugin::run_clustering(ClusterSequence & clust_seq) const {
64 // print a banner if we run this for the first time
65 _print_banner(clust_seq.fastjet_banner_stream());
66
67 // create the physics towers needed by the CDF code
68 vector<PhysicsTower> towers;
69 towers.reserve(clust_seq.jets().size());
70
71 // create a map to identify jets (actually just the input particles)...
72 //map<double,int> jetmap;
73
74 for (unsigned i = 0; i < clust_seq.jets().size(); i++) {
75 PseudoJet particle(clust_seq.jets()[i]);
76 //_insert_unique(particle, jetmap);
77 LorentzVector fourvect(particle.px(), particle.py(),
78 particle.pz(), particle.E());
79 PhysicsTower tower(fourvect);
80 // add tracking information for later
81 tower.fjindex = i;
82 towers.push_back(tower);
83 }
84
85 // prepare the CDF algorithm
86 JetCluAlgorithm j(seed_threshold(), cone_radius(), adjacency_cut(),
87 max_iterations(), iratch(), overlap_threshold());
88
89 // run the CDF algorithm
90 std::vector<Cluster> jets;
91 j.run(towers,jets);
92
93
94 // now transfer the jets back into our own structure -- we will
95 // mimic the cone code with a sequential recombination sequence in
96 // which the jets are built up by adding one particle at a time
97
98 // NB: with g++-4.0, the reverse iterator code gave problems, so switch
99 // to indices instead
100 //for(vector<Cluster>::const_reverse_iterator jetIter = jets.rbegin();
101 // jetIter != jets.rend(); jetIter++) {
102 // const vector<PhysicsTower> & tower_list = jetIter->towerList;
103 // int jet_k = jetmap[tower_list[0].fourVector.E];
104 //
105 // int ntow = int(jetIter->towerList.size());
106
107 for(int iCDFjets = jets.size()-1; iCDFjets >= 0; iCDFjets--) {
108
109 const vector<PhysicsTower> & tower_list = jets[iCDFjets].towerList;
110 int ntow = int(tower_list.size());
111
112 // 2008-09-04: sort the towerList (according to fjindex) so as
113 // to have a consistent order for particles in jet
114 // (necessary because addition of ultra-soft particles
115 // sometimes often modifies the order, while maintaining
116 // the same overall set)
117 vector<int> jc_indices(ntow);
118 vector<double> fj_indices(ntow); // use double: benefit from existing routine
119 for (int itow = 0; itow < ntow; itow++) {
120 jc_indices[itow] = itow;
121 fj_indices[itow] = tower_list[itow].fjindex;
122 }
123 sort_indices(jc_indices, fj_indices);
124
125 int jet_k = tower_list[jc_indices[0]].fjindex;
126
127 for (int itow = 1; itow < ntow; itow++) {
128 if (tower_list[jc_indices[itow]].Et() > 1e-50) {
129 }
130 int jet_i = jet_k;
131 // retrieve our index for the jet
132 int jet_j;
133 jet_j = tower_list[jc_indices[itow]].fjindex;
134
135 // safety check
136 assert (jet_j >= 0 && jet_j < int(towers.size()));
137
138 // do a fake recombination step with dij=0
139 double dij = 0.0;
140
141 // JetClu does E-scheme recombination so we can stick with the
142 // simple option
143 clust_seq.plugin_record_ij_recombination(jet_i, jet_j, dij, jet_k);
144
145 }
146
147 // NB: put a sensible looking d_iB just to be nice...
148 double d_iB = clust_seq.jets()[jet_k].perp2();
149 clust_seq.plugin_record_iB_recombination(jet_k, d_iB);
150 }
151
152
153 // following code is for testing only
154 //cout << endl;
155 //for(vector<Cluster>::const_iterator jetIter = jets.begin();
156 // jetIter != jets.end(); jetIter++) {
157 // cout << jetIter->fourVector.pt() << " " << jetIter->fourVector.y() << endl;
158 //}
159 //cout << "-----------------------------------------------------\n";
160 //vector<PseudoJet> ourjets(clust_seq.inclusive_jets());
161 //for (vector<PseudoJet>::const_iterator ourjet = ourjets.begin();
162 // ourjet != ourjets.end(); ourjet++) {
163 // cout << ourjet->perp() << " " << ourjet->rap() << endl;
164 //}
165 //cout << endl;
166}
167
168
169// print a banner for reference to the 3rd-party code
170void CDFJetCluPlugin::_print_banner(ostream *ostr) const{
171 if (! _first_time) return;
172 _first_time=false;
173
174 // make sure the user has not set the banner stream to NULL
175 if (!ostr) return;
176
177 (*ostr) << "#-------------------------------------------------------------------------" << endl;
178 (*ostr) << "# You are running the CDF JetClu plugin for FastJet " << endl;
179 (*ostr) << "# This is based on an implementation provided by Joey Huston. " << endl;
180 (*ostr) << "# If you use this plugin, please cite " << endl;
181 (*ostr) << "# F. Abe et al. [CDF Collaboration], Phys. Rev. D 45 (1992) 1448. " << endl;
182 (*ostr) << "# in addition to the usual FastJet reference. " << endl;
183 (*ostr) << "#-------------------------------------------------------------------------" << endl;
184
185 // make sure we really have the output done.
186 ostr->flush();
187}
188
189FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
Note: See TracBrowser for help on using the repository browser.