| 1 | /*
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| 2 | * Delphes: a framework for fast simulation of a generic collider experiment
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| 3 | * Copyright (C) 2020 Universite catholique de Louvain (UCLouvain), Belgium
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| 4 | *
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| 5 | * This program is free software: you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation, either version 3 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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| 19 | /** \class TrackCovariance
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| 20 | *
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| 21 | * Smears track parameters according to appropriate covariance matrix.
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| 22 | *
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| 23 | * \author P. Demin - UCLouvain, Louvain-la-Neuve
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| 24 | *
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| 25 | */
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| 26 |
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| 27 | #include "modules/TrackCovariance.h"
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| 28 |
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| 29 | #include "classes/DelphesClasses.h"
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| 30 |
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| 31 | #include "TrackCovariance/SolGeom.h"
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| 32 | #include "TrackCovariance/SolGridCov.h"
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| 33 | #include "TrackCovariance/ObsTrk.h"
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| 34 |
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| 35 | #include "TLorentzVector.h"
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| 36 | #include "TMath.h"
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| 37 | #include "TObjArray.h"
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| 38 |
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| 39 | //------------------------------------------------------------------------------
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| 40 |
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| 41 | TrackCovariance::TrackCovariance() :
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| 42 | fGeometry(0), fCovariance(0), fItInputArray(0)
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| 43 | {
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| 44 | fGeometry = new SolGeom();
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| 45 | fCovariance = new SolGridCov();
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| 46 | }
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| 47 |
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| 48 | //------------------------------------------------------------------------------
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| 49 |
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| 50 | TrackCovariance::~TrackCovariance()
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| 51 | {
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| 52 | if(fGeometry) delete fGeometry;
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| 53 | if(fCovariance) delete fCovariance;
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| 54 | }
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| 55 |
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| 56 | //------------------------------------------------------------------------------
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| 57 |
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| 58 | void TrackCovariance::Init()
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| 59 | {
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| 60 | fBz = GetDouble("Bz", 0.0);
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| 61 | fGeometry->Read(GetString("DetectorGeometry", ""));
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| 62 |
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| 63 | fCovariance->Calc(fGeometry);
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| 64 |
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| 65 | // import input array
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| 66 |
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| 67 | fInputArray = ImportArray(GetString("InputArray", "TrackMerger/tracks"));
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| 68 | fItInputArray = fInputArray->MakeIterator();
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| 69 |
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| 70 | // create output array
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| 71 |
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| 72 | fOutputArray = ExportArray(GetString("OutputArray", "tracks"));
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| 73 | }
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| 74 |
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| 75 | //------------------------------------------------------------------------------
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| 76 |
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| 77 | void TrackCovariance::Finish()
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| 78 | {
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| 79 | if(fItInputArray) delete fItInputArray;
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| 80 | }
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| 81 |
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| 82 | //------------------------------------------------------------------------------
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| 83 |
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| 84 | void TrackCovariance::Process()
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| 85 | {
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| 86 | Candidate *candidate, *mother;
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| 87 | Double_t energy;
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| 88 |
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| 89 | fItInputArray->Reset();
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| 90 | while((candidate = static_cast<Candidate *>(fItInputArray->Next())))
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| 91 | {
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| 92 | const TLorentzVector &candidatePosition = candidate->Position;
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| 93 | const TLorentzVector &candidateMomentum = candidate->Momentum;
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| 94 |
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| 95 | energy = candidateMomentum.E();
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| 96 |
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| 97 | ObsTrk track(candidatePosition.Vect(), candidateMomentum.Vect(), candidate->Charge, fBz, fCovariance);
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| 98 |
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| 99 | mother = candidate;
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| 100 | candidate = static_cast<Candidate *>(candidate->Clone());
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| 101 | candidate->Momentum.SetVect(track.GetObsP());
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| 102 | candidate->Momentum.SetE(energy);
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| 103 |
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| 104 | candidate->AddCandidate(mother);
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| 105 |
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| 106 | fOutputArray->Add(candidate);
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | //------------------------------------------------------------------------------
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