FastJet  3.1.1
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ClusterSequenceArea.cc
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2 // $Id: ClusterSequenceArea.cc 3433 2014-07-23 08:17:03Z salam $
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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).
41 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
the longitudinally invariant kt algorithm