FastJet 3.0.2
RangeDefinition.cc
00001 //STARTHEADER
00002 // $Id: RangeDefinition.cc 2577 2011-09-13 15:11:38Z salam $
00003 //
00004 // Copyright (c) 2005-2011, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
00005 //
00006 //----------------------------------------------------------------------
00007 // This file is part of FastJet.
00008 //
00009 //  FastJet is free software; you can redistribute it and/or modify
00010 //  it under the terms of the GNU General Public License as published by
00011 //  the Free Software Foundation; either version 2 of the License, or
00012 //  (at your option) any later version.
00013 //
00014 //  The algorithms that underlie FastJet have required considerable
00015 //  development and are described in hep-ph/0512210. If you use
00016 //  FastJet as part of work towards a scientific publication, please
00017 //  include a citation to the FastJet paper.
00018 //
00019 //  FastJet is distributed in the hope that it will be useful,
00020 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
00021 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00022 //  GNU General Public License for more details.
00023 //
00024 //  You should have received a copy of the GNU General Public License
00025 //  along with FastJet. If not, see <http://www.gnu.org/licenses/>.
00026 //----------------------------------------------------------------------
00027 //ENDHEADER
00028 
00029 #include "fastjet/RangeDefinition.hh"
00030 
00031 FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
00032 
00033 using namespace std;
00034  
00035 LimitedWarning RangeDefinition::_warnings_deprecated;
00036 
00037 // calculate, and set in _total_area, the area with a numerical test
00038 // takes a reasonable time with rapmax = 10, npoints = 100
00039 void RangeDefinition::_numerical_total_area(double rapmax, int npoints) {
00040 
00041       int count = 0;
00042       double deltaphi = twopi/double(npoints);
00043       double deltarap = 2.0*rapmax/double(npoints);
00044       double phi = 0.0;
00045       for(int i = 0; i < npoints; i++) {
00046         double rap = -rapmax;
00047         for (int j = 0; j < npoints; j++) {
00048           if ( is_in_range(rap,phi) ) { count++; }
00049           rap += deltarap;
00050         }
00051         phi += deltaphi;
00052       }
00053 
00054       _total_area = double(count)/double(npoints*npoints)*2.0*twopi*rapmax;
00055 }
00056 
00057 
00058 // the use of RangeDefinition is deprecated since FastJet version
00059 // 3.0 onwards. Please use Selector instead.  
00060 // RangeDefinition is only provided for backward compatibility
00061 // reasons and is not guaranteed to work in future releases of
00062 // FastJet.
00063 void RangeDefinition::_warn_deprecated() const{
00064   _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.");
00065 }
00066 
00067 FASTJET_END_NAMESPACE
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