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Dnn4piCylinder.hh

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00001 //STARTHEADER
00002 // $Id: Dnn4piCylinder.hh 431 2007-01-20 10:44:55Z salam $
00003 //
00004 // Copyright (c) 2005-2006, Matteo Cacciari and Gavin Salam
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, write to the Free Software
00026 //  Foundation, Inc.:
00027 //      59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00028 //----------------------------------------------------------------------
00029 //ENDHEADER
00030 
00031 
00032 #ifndef DROP_CGAL // in case we do not have the code for CGAL
00033 #ifndef __FASTJET_DNN4PICYLINDER_HH__
00034 #define __FASTJET_DNN4PICYLINDER_HH__
00035 
00036 #include "fastjet/internal/DynamicNearestNeighbours.hh"
00037 #include "fastjet/internal/DnnPlane.hh"
00038 #include "fastjet/internal/numconsts.hh"
00039 
00040 FASTJET_BEGIN_NAMESPACE      // defined in fastjet/internal/base.hh
00041 
00045 class Dnn4piCylinder : public DynamicNearestNeighbours {
00046  public:
00048   Dnn4piCylinder() {}
00049 
00053   Dnn4piCylinder(const std::vector<EtaPhi> &, const bool & verbose = false );
00054 
00057   int NearestNeighbourIndex(const int & ii) const ;
00058 
00061   double NearestNeighbourDistance(const int & ii) const ;
00062 
00066   bool Valid(const int & index) const;
00067 
00068   void RemoveAndAddPoints(const std::vector<int> & indices_to_remove,
00069                           const std::vector<EtaPhi> & points_to_add,
00070                           std::vector<int> & indices_added,
00071                           std::vector<int> & indices_of_updated_neighbours);
00072 
00073   ~Dnn4piCylinder();
00074 
00075  private:
00076 
00077   bool _verbose;
00078 
00079   // NB: we define POINTERS here because the initialisation gave
00080   //     us problems (things crashed!), perhaps because in practice
00081   //     we were making a copy without being careful and defining
00082   //     a proper copy constructor.
00083   DnnPlane * _DNN1, * _DNN2;
00084 
00087   inline EtaPhi _remap_phi(const EtaPhi & point) {
00088     double phi = point.second;
00089     if (phi < pi) { phi += twopi ;}
00090     return EtaPhi(point.first, phi);}
00091 
00092 };
00093 
00094 
00095 // here follow some inline implementations of the simpler of the
00096 // functions defined above
00097 
00098 inline int Dnn4piCylinder::NearestNeighbourIndex(const int & current) const {
00099   return (_DNN1->NearestNeighbourDistance(current) < 
00100           _DNN2->NearestNeighbourDistance(current)) ? 
00101     _DNN1->NearestNeighbourIndex(current) : 
00102     _DNN2->NearestNeighbourIndex(current) ; 
00103 }
00104 
00105 inline double Dnn4piCylinder::NearestNeighbourDistance(const int & current) const {
00106   return (_DNN1->NearestNeighbourDistance(current) < 
00107           _DNN2->NearestNeighbourDistance(current)) ? 
00108     _DNN1->NearestNeighbourDistance(current) : 
00109     _DNN2->NearestNeighbourDistance(current) ; 
00110 }
00111 
00112 inline bool Dnn4piCylinder::Valid(const int & index) const {
00113   return (_DNN1->Valid(index) && _DNN2->Valid(index));
00114 }
00115 
00116 
00117 inline Dnn4piCylinder::~Dnn4piCylinder() {
00118   delete _DNN1; 
00119   delete _DNN2;
00120 }
00121 
00122 
00123 FASTJET_END_NAMESPACE
00124 
00125 #endif //  __FASTJET_DNN4PICYLINDER_HH__
00126 #endif //  DROP_CGAL 

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