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source: git/external/fastjet/ClusterSequencePassiveArea.cc@ 0e6b14e

ImprovedOutputFile Timing
Last change on this file since 0e6b14e was b7b836a, checked in by Pavel Demin <pavel-demin@…>, 7 years ago

update FastJet library to 3.3.1 and FastJet Contrib library to 1.036

  • Property mode set to 100644
File size: 4.5 KB
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1//FJSTARTHEADER
2// $Id: ClusterSequencePassiveArea.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/ClusterSequencePassiveArea.hh"
32#include "fastjet/ClusterSequenceVoronoiArea.hh"
33
34FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
35
36
37using namespace std;
38
39//----------------------------------------------------------------------
40/// global routine for initialising and running a passive area that is
41/// correct in general, but that chooses an optimal approach for
42/// various special cases.
43void ClusterSequencePassiveArea::_initialise_and_run_PA (
44 const JetDefinition & jet_def_in,
45 const GhostedAreaSpec & area_spec,
46 const bool & writeout_combinations) {
47
48 if (jet_def_in.jet_algorithm() == kt_algorithm) {
49 // first run the passive area
50 ClusterSequenceVoronoiArea csva(_jets,jet_def_in,VoronoiAreaSpec(1.0));
51 // now set up and transfer relevant information
52 // first the clustering sequence
53 transfer_from_sequence(csva);
54 // then the areas
55 _resize_and_zero_AA();
56 for (unsigned i = 0; i < _history.size(); i++) {
57 int ijetp = _history[i].jetp_index;
58 if (ijetp != Invalid) {
59 _average_area[i] = csva.area(_jets[ijetp]);
60 _average_area_4vector[i] = csva.area_4vector(_jets[ijetp]);
61 }
62 }
63
64 } else if (jet_def_in.jet_algorithm() == cambridge_algorithm) {
65 // run a variant of the cambridge algorithm that has been hacked
66 // to deal with passive areas
67 JetDefinition tmp_jet_def = jet_def_in;
68 tmp_jet_def.set_jet_finder(cambridge_for_passive_algorithm);
69 tmp_jet_def.set_extra_param(sqrt(area_spec.mean_ghost_kt()));
70 _initialise_and_run_AA(tmp_jet_def, area_spec, writeout_combinations);
71 _jet_def = jet_def_in;
72
73 } else if (jet_def_in.jet_algorithm() == antikt_algorithm) {
74 // for the antikt algorithm, passive and active are identical
75 _initialise_and_run_AA(jet_def_in, area_spec, writeout_combinations);
76
77 } else if (jet_def_in.jet_algorithm() == plugin_algorithm &&
78 jet_def_in.plugin()->supports_ghosted_passive_areas()) {
79 // for some plugin algorithms, one can "prime" the algorithm with information
80 // about the ghost scale, and then an "AA" run will actually give a passive
81 // area
82 double ghost_sep_scale_store = jet_def_in.plugin()->ghost_separation_scale();
83 jet_def_in.plugin()->set_ghost_separation_scale(sqrt(area_spec.mean_ghost_kt()));
84 _initialise_and_run_AA(jet_def_in, area_spec, writeout_combinations);
85
86 // restore the original ghost_sep_scale
87 jet_def_in.plugin()->set_ghost_separation_scale(ghost_sep_scale_store);
88
89 } else {
90 // for a generic algorithm, just run the 1GhostPassiveArea
91 _initialise_and_run_1GPA(jet_def_in, area_spec, writeout_combinations);
92 }
93}
94
95//----------------------------------------------------------------------
96// dispatch to most relevant empty area calculation...
97double ClusterSequencePassiveArea::empty_area (const Selector & selector) const {
98 if (jet_def().jet_algorithm() == kt_algorithm) {
99 // run the naive algorithm
100 return ClusterSequenceAreaBase::empty_area(selector);
101 } else {
102 return ClusterSequence1GhostPassiveArea::empty_area(selector);
103 }
104}
105
106
107FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh
108
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