FastJet 3.0.2
Dnn4piCylinder.cc
00001 //STARTHEADER
00002 // $Id: Dnn4piCylinder.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 
00030 #ifndef DROP_CGAL // in case we do not have the code for CGAL
00031 #include <set>
00032 #include "fastjet/internal/Dnn4piCylinder.hh"
00033 using namespace std;
00034 
00035 FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
00036 
00037 //----------------------------------------------------------------------
00038 /// initialiser...
00039 Dnn4piCylinder::Dnn4piCylinder(
00040         const vector<EtaPhi> & input_points, const bool & verbose) {
00041   
00042   _verbose = verbose;
00043   vector<EtaPhi> copied_points(input_points.size());
00044   for (unsigned int i=0; i < input_points.size(); i++) {
00045     double phi = input_points[i].second;
00046     assert(phi >= 0.0 && phi < 2*pi);
00047     copied_points[i] = _remap_phi(input_points[i]);
00048   }
00049 
00050   if (_verbose) cout << "============== Preparing _DNN1" << endl;
00051   _DNN1 = new DnnPlane(input_points, verbose);
00052   if (_verbose) cout << "============== Preparing _DNN2" << endl;
00053   _DNN2 = new DnnPlane(copied_points, verbose);
00054 }
00055 
00056 
00057 //----------------------------------------------------------------------
00058 /// insertion and removal of points
00059 void Dnn4piCylinder::RemoveAndAddPoints(const vector<int> & indices_to_remove,
00060                                 const vector<EtaPhi> & points_to_add,
00061                                 vector<int> & indices_added,
00062                                 vector<int> & indices_of_updated_neighbours) {
00063   
00064   vector<int> indices1, indices2;
00065   
00066   _DNN1->RemoveAndAddPoints(indices_to_remove,points_to_add,
00067                                       indices_added,indices1);
00068 
00069   // create a vector with the remapped points (pi..3pi)
00070   vector<EtaPhi> remapped_points(points_to_add.size());
00071   for (size_t i = 0; i < points_to_add.size(); i++) {
00072     remapped_points[i] = _remap_phi(points_to_add[i]);
00073   }
00074   _DNN2->RemoveAndAddPoints(indices_to_remove, remapped_points, 
00075                                       indices_added,indices2);
00076   
00077   // merge the two sequences of updated vertices, avoiding double entries
00078   // of vertices with the same index
00079   set<int> index_set;
00080   unsigned int i;
00081   for (i=0; i < indices1.size(); i++) {index_set.insert(indices1[i]);}
00082   for (i=0; i < indices2.size(); i++) {index_set.insert(indices2[i]);}
00083 
00084   indices_of_updated_neighbours.clear();
00085   for (set<int>::iterator iter = index_set.begin(); 
00086        iter != index_set.end(); iter++) {
00087     indices_of_updated_neighbours.push_back(*iter);
00088   }
00089 }
00090 
00091 FASTJET_END_NAMESPACE
00092 
00093 #endif //  DROP_CGAL 
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