[5] | 1 | //STARTHEADER |
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| 2 | // $Id: ClusterSequence1GhostPassiveArea.cc 859 2012-11-28 01:49:23Z pavel $ |
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| 3 | // |
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| 4 | // Copyright (c) 2005-2011, Matteo Cacciari, Gavin P. Salam and Gregory Soyez |
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| 5 | // |
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| 6 | //---------------------------------------------------------------------- |
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| 7 | // This file is part of FastJet. |
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| 8 | // |
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| 9 | // FastJet is free software; you can redistribute it and/or modify |
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| 10 | // it under the terms of the GNU General Public License as published by |
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| 11 | // the Free Software Foundation; either version 2 of the License, or |
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| 12 | // (at your option) any later version. |
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| 13 | // |
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| 14 | // The algorithms that underlie FastJet have required considerable |
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| 15 | // development and are described in hep-ph/0512210. If you use |
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| 16 | // FastJet as part of work towards a scientific publication, please |
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| 17 | // include a citation to the FastJet paper. |
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| 18 | // |
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| 19 | // FastJet is distributed in the hope that it will be useful, |
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| 20 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 21 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 22 | // GNU General Public License for more details. |
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| 23 | // |
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| 24 | // You should have received a copy of the GNU General Public License |
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| 25 | // along with FastJet. If not, see <http://www.gnu.org/licenses/>. |
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| 26 | //---------------------------------------------------------------------- |
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| 27 | //ENDHEADER |
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| 28 | |
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| 29 | #include "fastjet/ClusterSequence1GhostPassiveArea.hh" |
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| 30 | |
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| 31 | FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh |
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| 32 | |
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| 33 | |
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| 34 | using namespace std; |
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| 35 | |
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| 36 | //---------------------------------------------------------------------- |
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| 37 | /// global routine for initialising and running a general passive area |
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| 38 | void ClusterSequence1GhostPassiveArea::_initialise_and_run_1GPA ( |
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| 39 | const JetDefinition & jet_def_in, |
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| 40 | const GhostedAreaSpec & area_spec, |
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| 41 | const bool & writeout_combinations) { |
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| 42 | |
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| 43 | bool continue_running; |
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| 44 | _initialise_AA(jet_def_in, area_spec, writeout_combinations, continue_running); |
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| 45 | if (continue_running) { |
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| 46 | _run_1GPA(area_spec); |
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| 47 | _postprocess_AA(area_spec); |
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| 48 | } |
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| 49 | } |
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| 50 | |
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| 51 | |
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| 52 | //---------------------------------------------------------------------- |
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| 53 | /// routine for running a passive area one ghost at a time. |
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| 54 | void ClusterSequence1GhostPassiveArea::_run_1GPA (const GhostedAreaSpec & area_spec) { |
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| 55 | // record the input jets as they are currently |
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| 56 | vector<PseudoJet> input_jets(_jets); |
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| 57 | |
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| 58 | // code for testing the unique tree |
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| 59 | vector<int> unique_tree; |
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| 60 | |
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| 61 | // initialise our temporary average area^2 |
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| 62 | valarray<double> lcl_average_area2(0.0, _average_area.size()); |
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| 63 | valarray<double> last_average_area(0.0, _average_area.size()); |
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| 64 | |
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| 65 | // run the clustering multiple times so as to get areas of all the jets |
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| 66 | for (int irepeat = 0; irepeat < area_spec.repeat(); irepeat++) { |
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| 67 | |
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| 68 | // first establish list of all ghosts |
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| 69 | vector<PseudoJet> all_ghosts; |
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| 70 | area_spec.add_ghosts(all_ghosts); |
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| 71 | |
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| 72 | // then run many subsets of ghosts (actually each subset contains just one ghost) |
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| 73 | for (unsigned ig = 0; ig < all_ghosts.size(); ig++) { |
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| 74 | vector<PseudoJet> some_ghosts; |
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| 75 | some_ghosts.push_back(all_ghosts[ig]); |
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| 76 | ClusterSequenceActiveAreaExplicitGhosts clust_seq(input_jets, jet_def(), |
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| 77 | some_ghosts, area_spec.actual_ghost_area()); |
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| 78 | |
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| 79 | if (irepeat == 0 && ig == 0) { |
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| 80 | // take the non-ghost part of the history and put into our own |
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| 81 | // history. |
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| 82 | _transfer_ghost_free_history(clust_seq); |
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| 83 | // get the "unique" order that will be used for transferring all areas. |
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| 84 | unique_tree = unique_history_order(); |
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| 85 | } |
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| 86 | |
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| 87 | // transfer areas from clust_seq into our object |
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| 88 | _transfer_areas(unique_tree, clust_seq); |
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| 89 | } |
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| 90 | // keep track of fluctuations in area |
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| 91 | lcl_average_area2 += (_average_area - last_average_area)* |
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| 92 | (_average_area - last_average_area); |
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| 93 | last_average_area = _average_area; |
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| 94 | } |
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| 95 | _average_area2 = lcl_average_area2; |
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| 96 | } |
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| 97 | |
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| 98 | |
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| 99 | FASTJET_END_NAMESPACE // defined in fastjet/internal/base.hh |
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| 100 | |
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