1 | #ifndef _MIDPOINT_ALGORITHM_HH_ |
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2 | #define _MIDPOINT_ALGORITHM_HH_ |
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3 | |
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4 | //---------------------------------------------------------------------- |
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5 | // This file distributed with FastJet has been obtained from |
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6 | // http://www.pa.msu.edu/~huston/Les_Houches_2005/JetClu+Midpoint-StandAlone.tgz |
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7 | // |
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8 | // Permission to distribute it with FastJet has been granted by Joey |
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9 | // Huston (see the COPYING file in the main FastJet directory for |
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10 | // details). |
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11 | // Changes from the original file are listed below. |
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12 | //---------------------------------------------------------------------- |
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13 | |
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14 | // History of changes compared to the original MidPointAlgorithm.hh file |
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15 | // |
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16 | // 2009-01-17 Gregory Soyez <soyez@fastjet.fr> |
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17 | // |
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18 | // * put the code in the fastjet::cdf namespace |
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19 | // |
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20 | // 2007-03-10 Gavin Salam <salam@lpthe.jussieu.fr> |
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21 | // |
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22 | // * added support for the pttilde scale choice in the CDF midpoint code |
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23 | // |
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24 | // 2007-02-21 Gavin Salam <salam@lpthe.jussieu.fr> |
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25 | // |
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26 | // * added option of choosing the scale used in the split-merge |
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27 | // procedure (pt [default], Et or mt) |
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28 | // |
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29 | // 2006-09-24 Gavin Salam <salam@lpthe.jussieu.fr> |
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30 | // |
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31 | // * removed the local_sort method |
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32 | // |
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33 | // 2006-09-24 Gavin Salam <salam@lpthe.jussieu.fr> |
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34 | // |
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35 | // * added JetClu+MidPoint to FastJet |
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36 | |
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37 | |
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38 | #include "PhysicsTower.hh" |
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39 | #include "Cluster.hh" |
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40 | #include <vector> |
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41 | |
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42 | #include <fastjet/internal/base.hh> |
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43 | |
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44 | FASTJET_BEGIN_NAMESPACE |
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45 | |
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46 | namespace cdf{ |
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47 | |
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48 | class MidPointAlgorithm |
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49 | { |
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50 | public: |
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51 | enum SplitMergeScale {SM_pt, SM_Et, SM_mt, SM_pttilde}; |
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52 | |
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53 | private: |
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54 | double _seedThreshold; |
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55 | double _coneRadius; |
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56 | double _coneAreaFraction; |
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57 | int _maxPairSize; |
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58 | int _maxIterations; |
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59 | double _overlapThreshold; |
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60 | SplitMergeScale _smScale; |
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61 | |
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62 | public: |
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63 | MidPointAlgorithm(): |
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64 | _seedThreshold(1), |
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65 | _coneRadius(0.7), |
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66 | _coneAreaFraction(0.25), |
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67 | _maxPairSize(2), |
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68 | _maxIterations(100), |
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69 | _overlapThreshold(0.75), |
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70 | _smScale(SM_pt) |
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71 | {} |
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72 | MidPointAlgorithm(double st, double cr, double caf, int mps, int mi, double ot, SplitMergeScale sm = SM_pt): |
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73 | _seedThreshold(st), |
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74 | _coneRadius(cr), |
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75 | _coneAreaFraction(caf), |
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76 | _maxPairSize(mps), |
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77 | _maxIterations(mi), |
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78 | _overlapThreshold(ot), |
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79 | _smScale(sm) |
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80 | {} |
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81 | void findStableConesFromSeeds(std::vector<PhysicsTower>& particles, std::vector<Cluster>& stableCones); |
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82 | void findStableConesFromMidPoints(std::vector<PhysicsTower>& particles, std::vector<Cluster>& stableCones); |
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83 | void iterateCone(volatile double startRapidity, volatile double startPhi, volatile double startPt, std::vector<PhysicsTower>& particles, |
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84 | std::vector<Cluster>& stableCones, bool reduceConeSize); |
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85 | void addClustersToPairs(std::vector<int>& testPair, std::vector< std::vector<int> >& pairs, |
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86 | std::vector< std::vector<bool> >& distanceOK, int maxClustersInPair); |
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87 | void splitAndMerge(std::vector<Cluster>& stableCones, std::vector<Cluster>& jets); |
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88 | void run(std::vector<PhysicsTower>& particles, std::vector<Cluster>& jets); |
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89 | |
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90 | /// sort the clusters into whatever order is |
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91 | void local_sort(std::vector<Cluster>&); |
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92 | |
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93 | }; |
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94 | |
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95 | } // namespace cdf |
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96 | |
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97 | FASTJET_END_NAMESPACE |
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98 | |
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99 | #endif |
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