source: HiSusy/trunk/Delphes-3.0.0/external/fastjet/RangeDefinition.cc @ 1

Last change on this file since 1 was 1, checked in by zerwas, 11 years ago

first import of structure, PYTHIA8 and DELPHES

File size: 2.6 KB
Line 
1//STARTHEADER
2// $Id: RangeDefinition.cc 859 2012-11-28 01:49:23Z pavel $
3//
4// Copyright (c) 2005-2011, 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 and are described in hep-ph/0512210. If you use
16//  FastJet as part of work towards a scientific publication, please
17//  include a citation to the FastJet paper.
18//
19//  FastJet is distributed in the hope that it will be useful,
20//  but WITHOUT ANY WARRANTY; without even the implied warranty of
21//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22//  GNU General Public License for more details.
23//
24//  You should have received a copy of the GNU General Public License
25//  along with FastJet. If not, see <http://www.gnu.org/licenses/>.
26//----------------------------------------------------------------------
27//ENDHEADER
28
29#include "fastjet/RangeDefinition.hh"
30
31FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
32
33using namespace std;
34 
35LimitedWarning RangeDefinition::_warnings_deprecated;
36
37// calculate, and set in _total_area, the area with a numerical test
38// takes a reasonable time with rapmax = 10, npoints = 100
39void RangeDefinition::_numerical_total_area(double rapmax, int npoints) {
40
41      int count = 0;
42      double deltaphi = twopi/double(npoints);
43      double deltarap = 2.0*rapmax/double(npoints);
44      double phi = 0.0;
45      for(int i = 0; i < npoints; i++) {
46        double rap = -rapmax;
47        for (int j = 0; j < npoints; j++) {
48          if ( is_in_range(rap,phi) ) { count++; }
49          rap += deltarap;
50        }
51        phi += deltaphi;
52      }
53
54      _total_area = double(count)/double(npoints*npoints)*2.0*twopi*rapmax;
55}
56
57
58// the use of RangeDefinition is deprecated since FastJet version
59// 3.0 onwards. Please use Selector instead. 
60// RangeDefinition is only provided for backward compatibility
61// reasons and is not guaranteed to work in future releases of
62// FastJet.
63void RangeDefinition::_warn_deprecated() const{
64  _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.");
65}
66
67FASTJET_END_NAMESPACE
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