2 #include "AliMultiplicity.h"
3 #include "AliITSgeomTGeo.h"
4 #include "AliITSVertexer.h"
5 #include "AliITSLoader.h"
6 #include "AliITSMultReconstructor.h"
8 const Float_t AliITSVertexer::fgkPipeRadius = 3.0;
10 ClassImp(AliITSVertexer)
12 //////////////////////////////////////////////////////////////////////
13 // Base class for primary vertex reconstruction //
14 // AliESDVertexer is a class for full 3D primary vertex finding //
15 // derived classes: AliITSVertexerIons AliITSvertexer3D //
16 // AliITSVertexerCosmics //
17 //////////////////////////////////////////////////////////////////////
19 //______________________________________________________________________
20 AliITSVertexer::AliITSVertexer():AliVertexer(),
26 // Default Constructor
30 //______________________________________________________________________
31 AliITSVertexer::~AliITSVertexer() {
33 if(fLadders) delete [] fLadders;
36 //______________________________________________________________________
37 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
38 // Invokes AliITSMultReconstructor to determine the
39 // charged multiplicity in the pixel layers
40 if(fMult){delete fMult; fMult = 0;}
42 if(!fCurrentVertex)success=kFALSE;
43 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
45 AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
48 AliITSMultReconstructor* multReco = new AliITSMultReconstructor();
50 if (!itsClusterTree) {
51 AliError(" Invalid ITS cluster tree !\n");
55 fCurrentVertex->GetXYZ(vtx);
57 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
58 multReco->SetHistOn(kFALSE);
59 multReco->Reconstruct(itsClusterTree,vtxf,vtxf);
60 Int_t notracks=multReco->GetNTracklets();
61 Float_t *tht = new Float_t [notracks];
62 Float_t *phi = new Float_t [notracks];
63 Float_t *dphi = new Float_t [notracks];
64 Int_t *labels = new Int_t[notracks];
65 Int_t *labelsL2 = new Int_t[notracks];
66 for(Int_t i=0;i<multReco->GetNTracklets();i++){
67 tht[i] = multReco->GetTracklet(i)[0];
68 phi[i] = multReco->GetTracklet(i)[1];
69 dphi[i] = multReco->GetTracklet(i)[2];
70 labels[i] = static_cast<Int_t>(multReco->GetTracklet(i)[3]);
71 labelsL2[i] = static_cast<Int_t>(multReco->GetTracklet(i)[4]);
73 Int_t nosingleclus=multReco->GetNSingleClusters();
74 Float_t *ths = new Float_t [nosingleclus];
75 Float_t *phs = new Float_t [nosingleclus];
76 for(Int_t i=0;i<nosingleclus;i++){
77 ths[i] = multReco->GetCluster(i)[0];
78 phs[i] = multReco->GetCluster(i)[1];
80 fMult = new AliMultiplicity(notracks,tht,phi,dphi,labels,labelsL2,nosingleclus,ths,phs);
93 //______________________________________________________________________
94 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
95 // Calculates the array of ladders on layer 2 to be used with a
96 // given ladder on layer 1
98 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
99 if(fLadders) delete [] fLadders;
100 fLadders=new UShort_t[ladtot1];
103 Double_t pos1[3],pos2[3];
104 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
105 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
106 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
107 if(phi0<0) phi0+=2*TMath::Pi();
108 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
109 AliITSgeomTGeo::GetTranslation(mod2,pos2);
110 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
111 if(phi2<0) phi2+=2*TMath::Pi();
112 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
114 for(Int_t i= 0; i<ladtot1;i++){
115 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
117 AliITSgeomTGeo::GetTranslation(modlad,posmod);
118 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
119 if(phimod<0) phimod+=2*TMath::Pi();
120 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
121 if(phi1<0) phi1+=2*TMath::Pi();
122 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
123 Double_t philad1=phi0-phi1;
125 Double_t ladder1=(philad1)/(deltaPhi) +1.;
126 if(ladder1<1){ladder1=40+ladder1;}
127 lad1=int(ladder1+0.5);
132 #include "AliRunLoader.h"
134 //______________________________________________________________________
135 void AliITSVertexer::Init(TString filename){
136 // Initialize the vertexer in case of
137 // analysis of an entire file
138 AliRunLoader *rl = AliRunLoader::GetRunLoader();
140 Fatal("AliITSVertexer","Run Loader not found");
142 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
144 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
145 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
146 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
149 //______________________________________________________________________
150 void AliITSVertexer::WriteCurrentVertex(){
151 // Write the current AliVertex object to file fOutFile
152 AliRunLoader *rl = AliRunLoader::GetRunLoader();
153 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
154 fCurrentVertex->SetName("Vertex");
155 // const char * name = fCurrentVertex->GetName();
156 // itsLoader->SetVerticesContName(name);
157 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
158 rc = itsLoader->WriteVertices();
161 //______________________________________________________________________
162 void AliITSVertexer::FindVertices(){
163 // computes the vertices of the events in the range FirstEvent - LastEvent
165 AliRunLoader *rl = AliRunLoader::GetRunLoader();
166 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
167 itsloader->LoadRecPoints("read");
168 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
170 TTree* cltree = itsloader->TreeR();
171 FindVertexForCurrentEvent(cltree);
173 WriteCurrentVertex();
176 AliDebug(1,Form("Vertex not found for event %d",i));