FastJet 3.4.3
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RangeDefinition.cc
1//FJSTARTHEADER
2// $Id$
3//
4// Copyright (c) 2005-2024, 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/RangeDefinition.hh"
32
33FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
34
35using namespace std;
36
37LimitedWarning RangeDefinition::_warnings_deprecated;
38
39// calculate, and set in _total_area, the area with a numerical test
40// takes a reasonable time with rapmax = 10, npoints = 100
41void RangeDefinition::_numerical_total_area(double rapmax, int npoints) {
42
43 int count = 0;
44 double deltaphi = twopi/double(npoints);
45 double deltarap = 2.0*rapmax/double(npoints);
46 double phi = 0.0;
47 for(int i = 0; i < npoints; i++) {
48 double rap = -rapmax;
49 for (int j = 0; j < npoints; j++) {
50 if ( is_in_range(rap,phi) ) { count++; }
51 rap += deltarap;
52 }
53 phi += deltaphi;
54 }
55
56 _total_area = double(count)/double(npoints*npoints)*2.0*twopi*rapmax;
57}
58
59
60// the use of RangeDefinition is deprecated since FastJet version
61// 3.0 onwards. Please use Selector instead.
62// RangeDefinition is only provided for backward compatibility
63// reasons and is not guaranteed to work in future releases of
64// FastJet.
65void RangeDefinition::_warn_deprecated() const{
66 _warnings_deprecated.warn("The use of RangeDefinition is deprecated since FastJet version 3.0 onwards. Please consider using Selector (defined in fastjet/Selector.hh) instead. There is no guarantee that support for RangeDefinition will be provided in future releases of FastJet.");
67}
68
69FASTJET_END_NAMESPACE