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RangeDefinition.cc
//FJSTARTHEADER
// $Id$
//
// Copyright (c) 2005-2021, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
//
//----------------------------------------------------------------------
// This file is part of FastJet.
//
// FastJet is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// The algorithms that underlie FastJet have required considerable
// development. They are described in the original FastJet paper,
// hep-ph/0512210 and in the manual, arXiv:1111.6097. If you use
// FastJet as part of work towards a scientific publication, please
// quote the version you use and include a citation to the manual and
// optionally also to hep-ph/0512210.
//
// FastJet is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with FastJet. If not, see <http://www.gnu.org/licenses/>.
//----------------------------------------------------------------------
//FJENDHEADER
#include "fastjet/RangeDefinition.hh"
FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
using namespace std;
LimitedWarning RangeDefinition::_warnings_deprecated;
// calculate, and set in _total_area, the area with a numerical test
// takes a reasonable time with rapmax = 10, npoints = 100
void RangeDefinition::_numerical_total_area(double rapmax, int npoints) {
int count = 0;
double deltaphi = twopi/double(npoints);
double deltarap = 2.0*rapmax/double(npoints);
double phi = 0.0;
for(int i = 0; i < npoints; i++) {
double rap = -rapmax;
for (int j = 0; j < npoints; j++) {
if ( is_in_range(rap,phi) ) { count++; }
rap += deltarap;
}
phi += deltaphi;
}
_total_area = double(count)/double(npoints*npoints)*2.0*twopi*rapmax;
}
// the use of RangeDefinition is deprecated since FastJet version
// 3.0 onwards. Please use Selector instead.
// RangeDefinition is only provided for backward compatibility
// reasons and is not guaranteed to work in future releases of
// FastJet.
void RangeDefinition::_warn_deprecated() const{
_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.");
}
FASTJET_END_NAMESPACE
fastjet::RangeDefinition::is_in_range
bool is_in_range(const PseudoJet &jet) const
return bool according to whether the jet is within the given range
Definition RangeDefinition.hh:125
fastjet::RangeDefinition::_numerical_total_area
void _numerical_total_area(double rapmax, int npoints)
calculate, and set _total_area, by calculating which of points on a grid (npoints * npoints from -rap...
Definition RangeDefinition.cc:41