Bugfix, seems more like trial and error.
[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]);
74e5a625 113 //cout << vertexpos[0] << " " << vertexpos[1] << " " << vertexpos[2] << endl;
5d60c8f9 114
75a0c43e 115 AliL3Track l3;
46a140bc 116 AliL3Vertex v;
117 v.SetX(vertexpos[0]);
c5368c62 118 v.SetY(vertexpos[1]);
119 v.SetZ(vertexpos[2]);
46a140bc 120 Double_t xc=0.,yc=0.,zc=0.;
04a02430 121 for (Int_t i = 0;i<ntr; i++) {
122 AliESDHLTtrack *kesdtrack;
123 if(fTrackerType){
124 kesdtrack=esd->GetHLTConfMapTrack(i);
125 } else {
126 kesdtrack=esd->GetHLTHoughTrack(i);
127 }
5d60c8f9 128
04a02430 129 if (kesdtrack == 0)
5d60c8f9 130 {
131 Error("ReadESD","Can not get track %d", i);
132 continue;
133 }
134
46a140bc 135 //const Float_t kpid=kesdtrack->GetPID();
136 const Int_t knhits=kesdtrack->GetNHits();
137 const Int_t kweight=kesdtrack->GetWeight();
138 //cout << i << " " << kweight << " " << knhits << endl;
139 if((fMinHits>0) && (knhits<fMinHits)) continue;
140 if(kweight>1000) continue; //avoid ghosts
141 if((fMinWeight>0) && (kweight<fMinWeight)) continue;
142
143 Float_t px=kesdtrack->GetPx();
144 Float_t py=kesdtrack->GetPy();
145 Float_t pz=kesdtrack->GetPz();
146
75a0c43e 147 if(fTrackerType){
148 //if(!kesdtrack->ComesFromMainVertex()) continue;
74e5a625 149 //cout << kesdtrack->GetPx() << " " << kesdtrack->GetPy() << " " << kesdtrack->GetPz() << endl;
75a0c43e 150 l3.SetFirstPoint(kesdtrack->GetFirstPointX(),kesdtrack->GetFirstPointY(),kesdtrack->GetFirstPointZ());
151 l3.SetLastPoint(kesdtrack->GetLastPointX(),kesdtrack->GetLastPointY(),kesdtrack->GetLastPointZ());
152 l3.SetCharge(kesdtrack->GetCharge());
153 l3.SetPt(kesdtrack->GetPt());
154 l3.SetTgl(kesdtrack->GetTgl());
155 l3.SetPsi(kesdtrack->GetPsi());
156 l3.CalculateHelix();
46a140bc 157 l3.GetClosestPoint(&v,xc,yc,zc);
158 if(TMath::Abs(zc)>10.) continue;
159 l3.SetFirstPoint(vertexpos[0],vertexpos[1],vertexpos[2]);
74e5a625 160 //l3.CalculateHelix();
75a0c43e 161 l3.UpdateToFirstPoint();
46a140bc 162 px=l3.GetPx();
163 py=l3.GetPy();
164 pz=l3.GetPz();
74e5a625 165 //cout << px << " " << py << " " << pz << endl;
75a0c43e 166 }
167
46a140bc 168 const Float_t kpt=TMath::Sqrt(px*px+py*py);
169 const Float_t kp=TMath::Sqrt(pz*pz+kpt*kpt);
170 const Float_t keta=0.5*TMath::Log((kp+pz+1e-30)/(kp-pz+1e-30));
171 const Float_t kphi=TMath::Pi()+TMath::ATan2(-py,-px);
5d60c8f9 172
04a02430 173 if(IsAcceptedParticle(kpt,kphi,keta))
46a140bc 174 fEventParticles->AddParticle(px,py,pz,kp,i,kesdtrack->GetMCid(),knhits,kpt,kphi,keta);
04a02430 175 } //loop over tracks
5d60c8f9 176
5d60c8f9 177 return kTRUE;
178}