1 //FJSTARTHEADER
2 // $Id: ClusterSequenceArea.cc 4442 2020-05-05 07:50:11Z soyez $
3 //
4 // Copyright (c) 2006-2020, 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/ClusterSequenceArea.hh"
32
33 FASTJET_BEGIN_NAMESPACE
34
35 LimitedWarning ClusterSequenceArea::_range_warnings;
36 LimitedWarning ClusterSequenceArea::_explicit_ghosts_repeats_warnings;
37
38 /// print a warning if the range is unsuitable for the current
39 /// calculation of the area (e.g. because ghosts do not extend
40 /// far enough).
_warn_if_range_unsuitable(const Selector & selector) const41 void ClusterSequenceArea::_warn_if_range_unsuitable(const Selector & selector) const {
42 _check_selector_good_for_median(selector);
43
44 bool no_ghosts = (_area_def.area_type() == voronoi_area)
45 || (_area_def.area_type() == passive_area
46 && jet_def().jet_algorithm() == kt_algorithm);
47 if (! no_ghosts) {
48 double rapmin, rapmax;
49 selector.get_rapidity_extent(rapmin, rapmax);
50 if (rapmin < -_area_def.ghost_spec().ghost_maxrap()+0.95*jet_def().R() ||
51 rapmax > _area_def.ghost_spec().ghost_maxrap()-0.95*jet_def().R()) {
52 _range_warnings.warn("rapidity range for median (rho) extends beyond +-(ghost_maxrap - 0.95*R); this is likely to cause the results to be unreliable; safest option is to increase ghost_maxrap in the area definition");
53 }
54 }
55 }
56
57
58 FASTJET_END_NAMESPACE
59