Bugfix.
[u/mrichter/AliRoot.git] / JETAN / AliJetParticlesReaderHLT.cxx
CommitLineData
5d60c8f9 1// $Id$
2
3//___________________________________________________________________________
4/////////////////////////////////////////////////////////////////////////////
5// //
6// File reader for HLT tracks ESD //
7// //
8// loizides@ikf.uni-frankfurt.de //
9/////////////////////////////////////////////////////////////////////////////
10
11#include <Riostream.h>
12#include <TMath.h>
13#include <TString.h>
14#include <TObjString.h>
15#include <TTree.h>
16#include <TFile.h>
17#include <AliESD.h>
18#include <AliESDtrack.h>
19#include <AliESDHLTtrack.h>
75a0c43e 20#include <AliL3Track.h>
46a140bc 21#include <AliL3Vertex.h>
04a02430 22#include <AliKalmanTrack.h>
5d60c8f9 23#include <AliJetEventParticles.h>
24#include "AliJetParticlesReaderHLT.h"
25
26ClassImp(AliJetParticlesReaderHLT)
27
28AliJetParticlesReaderHLT::AliJetParticlesReaderHLT(Bool_t bMapper, const Char_t* esdfilename) :
d9a296b1 29 AliJetParticlesReaderESD(0,esdfilename),
04a02430 30 fTrackerType(bMapper),
31 fMinHits(0),
32 fMinWeight(0)
5d60c8f9 33{
34 //constructor
35}
36
37/********************************************************************/
38
39AliJetParticlesReaderHLT::AliJetParticlesReaderHLT(
40 Bool_t bMapper,
41 TObjArray* dirs,
42 const Char_t* esdfilename) :
d9a296b1 43 AliJetParticlesReaderESD(0,dirs,esdfilename),
04a02430 44 fTrackerType(bMapper),
45 fMinHits(0),
46 fMinWeight(0)
47
5d60c8f9 48{
49 //constructor
50}
51
52/********************************************************************/
53
54AliJetParticlesReaderHLT::~AliJetParticlesReaderHLT()
55{
56 //desctructor
57}
58
59Int_t AliJetParticlesReaderHLT::ReadESD(AliESD* esd)
60{
61 //Reads one ESD
62
63 if (esd == 0)
64 {
65 Error("ReadESD","ESD is NULL");
66 return kFALSE;
67 }
68
04a02430 69 Float_t mf = esd->GetMagneticField();
70 if (mf <= 0.0)
71 {
72 Error("ReadESD","Magnetic Field is 0. Skipping to next event.");
73 return kFALSE;
74 }
75 AliKalmanTrack::SetMagneticField(mf/10.);
76
a86edc4e 77 Info("ReadESD","Reading Event %d",fCurrentDir*1000+fCurrentEvent);
5d60c8f9 78 if((!fOwner) || (fEventParticles==0))
79 fEventParticles = new AliJetEventParticles();
80
04a02430 81 Int_t ntr=0;
82 if(fTrackerType){
83 ntr =esd->GetNumberOfHLTHoughTracks();
84 Info("ReadESD","Found %d conformal tracks.",ntr);
85 } else {
86 ntr=esd->GetNumberOfHLTHoughTracks();
87 Info("ReadESD","Found %d hough tracks.",ntr);
88 }
89 fEventParticles->Reset(ntr);
90
91 TString headdesc="";
92 headdesc+="Run ";
93 headdesc+=esd->GetRunNumber();
94 headdesc+=": Ev ";
95 headdesc+=esd->GetEventNumber();
96 fEventParticles->SetHeader(headdesc);
97
5d60c8f9 98 Double_t vertexpos[3];//vertex position
99 const AliESDVertex* kvertex = esd->GetVertex();
100 if (kvertex == 0)
101 {
102 Info("ReadESD","ESD returned NULL pointer to vertex - assuming (0.0,0.0,0.0)");
103 vertexpos[0] = 0.0;
104 vertexpos[1] = 0.0;
105 vertexpos[2] = 0.0;
106 }
107 else
108 {
109 kvertex->GetXYZ(vertexpos);
110 }
111
112 fEventParticles->SetVertex(vertexpos[0],vertexpos[1],vertexpos[2]);
113
75a0c43e 114 AliL3Track l3;
46a140bc 115 AliL3Vertex v;
116 v.SetX(vertexpos[0]);
c5368c62 117 v.SetY(vertexpos[1]);
118 v.SetZ(vertexpos[2]);
46a140bc 119 Double_t xc=0.,yc=0.,zc=0.;
04a02430 120 for (Int_t i = 0;i<ntr; i++) {
121 AliESDHLTtrack *kesdtrack;
122 if(fTrackerType){
123 kesdtrack=esd->GetHLTConfMapTrack(i);
124 } else {
125 kesdtrack=esd->GetHLTHoughTrack(i);
126 }
5d60c8f9 127
04a02430 128 if (kesdtrack == 0)
5d60c8f9 129 {
130 Error("ReadESD","Can not get track %d", i);
131 continue;
132 }
133
46a140bc 134 //const Float_t kpid=kesdtrack->GetPID();
135 const Int_t knhits=kesdtrack->GetNHits();
136 const Int_t kweight=kesdtrack->GetWeight();
137 //cout << i << " " << kweight << " " << knhits << endl;
138 if((fMinHits>0) && (knhits<fMinHits)) continue;
139 if(kweight>1000) continue; //avoid ghosts
140 if((fMinWeight>0) && (kweight<fMinWeight)) continue;
141
142 Float_t px=kesdtrack->GetPx();
143 Float_t py=kesdtrack->GetPy();
144 Float_t pz=kesdtrack->GetPz();
145
75a0c43e 146 if(fTrackerType){
147 //if(!kesdtrack->ComesFromMainVertex()) continue;
148 l3.SetFirstPoint(kesdtrack->GetFirstPointX(),kesdtrack->GetFirstPointY(),kesdtrack->GetFirstPointZ());
149 l3.SetLastPoint(kesdtrack->GetLastPointX(),kesdtrack->GetLastPointY(),kesdtrack->GetLastPointZ());
150 l3.SetCharge(kesdtrack->GetCharge());
151 l3.SetPt(kesdtrack->GetPt());
152 l3.SetTgl(kesdtrack->GetTgl());
153 l3.SetPsi(kesdtrack->GetPsi());
154 l3.CalculateHelix();
46a140bc 155 l3.GetClosestPoint(&v,xc,yc,zc);
156 if(TMath::Abs(zc)>10.) continue;
157 l3.SetFirstPoint(vertexpos[0],vertexpos[1],vertexpos[2]);
75a0c43e 158 l3.UpdateToFirstPoint();
46a140bc 159 px=l3.GetPx();
160 py=l3.GetPy();
161 pz=l3.GetPz();
75a0c43e 162 }
163
46a140bc 164 const Float_t kpt=TMath::Sqrt(px*px+py*py);
165 const Float_t kp=TMath::Sqrt(pz*pz+kpt*kpt);
166 const Float_t keta=0.5*TMath::Log((kp+pz+1e-30)/(kp-pz+1e-30));
167 const Float_t kphi=TMath::Pi()+TMath::ATan2(-py,-px);
5d60c8f9 168
04a02430 169 if(IsAcceptedParticle(kpt,kphi,keta))
46a140bc 170 fEventParticles->AddParticle(px,py,pz,kp,i,kesdtrack->GetMCid(),knhits,kpt,kphi,keta);
04a02430 171 } //loop over tracks
5d60c8f9 172
5d60c8f9 173 return kTRUE;
174}