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 //////////////////////////////////////////////////////////////////////
21 //______________________________________________________________________
22 AliITSVertexer::AliITSVertexer():AliVertexer(),
28 // Default Constructor
30 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
33 //______________________________________________________________________
34 AliITSVertexer::~AliITSVertexer() {
36 if(fLadders) delete [] fLadders;
39 //______________________________________________________________________
40 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
41 // Invokes AliITSMultReconstructor to determine the
42 // charged multiplicity in the pixel layers
43 if(fMult){delete fMult; fMult = 0;}
45 if(!fCurrentVertex)success=kFALSE;
46 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
48 AliITSMultReconstructor multReco;
51 AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
52 AliWarning("Just counting the number of cluster-fired chips on the SPD layers");
53 if (!itsClusterTree) {
54 AliError(" Invalid ITS cluster tree !\n");
57 multReco.LoadClusterFiredChips(itsClusterTree);
58 Short_t nfcL1 = multReco.GetNFiredChips(0);
59 Short_t nfcL2 = multReco.GetNFiredChips(1);
60 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,nfcL1,nfcL2);
64 if (!itsClusterTree) {
65 AliError(" Invalid ITS cluster tree !\n");
69 fCurrentVertex->GetXYZ(vtx);
71 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
72 multReco.SetHistOn(kFALSE);
73 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
74 Int_t notracks=multReco.GetNTracklets();
75 Float_t *tht = new Float_t [notracks];
76 Float_t *phi = new Float_t [notracks];
77 Float_t *dphi = new Float_t [notracks];
78 Int_t *labels = new Int_t[notracks];
79 Int_t *labelsL2 = new Int_t[notracks];
80 for(Int_t i=0;i<multReco.GetNTracklets();i++){
81 tht[i] = multReco.GetTracklet(i)[0];
82 phi[i] = multReco.GetTracklet(i)[1];
83 dphi[i] = multReco.GetTracklet(i)[2];
84 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[3]);
85 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
87 Int_t nosingleclus=multReco.GetNSingleClusters();
88 Float_t *ths = new Float_t [nosingleclus];
89 Float_t *phs = new Float_t [nosingleclus];
90 for(Int_t i=0;i<nosingleclus;i++){
91 ths[i] = multReco.GetCluster(i)[0];
92 phs[i] = multReco.GetCluster(i)[1];
94 Short_t nfcL1 = multReco.GetNFiredChips(0);
95 Short_t nfcL2 = multReco.GetNFiredChips(1);
96 fMult = new AliMultiplicity(notracks,tht,phi,dphi,labels,labelsL2,nosingleclus,ths,phs,nfcL1,nfcL2);
109 //______________________________________________________________________
110 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
111 // Calculates the array of ladders on layer 2 to be used with a
112 // given ladder on layer 1
114 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
115 if(fLadders) delete [] fLadders;
116 fLadders=new UShort_t[ladtot1];
119 Double_t pos1[3],pos2[3];
120 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
121 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
122 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
123 if(phi0<0) phi0+=2*TMath::Pi();
124 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
125 AliITSgeomTGeo::GetTranslation(mod2,pos2);
126 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
127 if(phi2<0) phi2+=2*TMath::Pi();
128 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
130 for(Int_t i= 0; i<ladtot1;i++){
131 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
133 AliITSgeomTGeo::GetTranslation(modlad,posmod);
134 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
135 if(phimod<0) phimod+=2*TMath::Pi();
136 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
137 if(phi1<0) phi1+=2*TMath::Pi();
138 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
139 Double_t philad1=phi0-phi1;
141 Double_t ladder1=(philad1)/(deltaPhi) +1.;
142 if(ladder1<1){ladder1=40+ladder1;}
143 lad1=int(ladder1+0.5);
148 #include "AliRunLoader.h"
150 //______________________________________________________________________
151 void AliITSVertexer::Init(TString filename){
152 // Initialize the vertexer in case of
153 // analysis of an entire file
154 AliRunLoader *rl = AliRunLoader::GetRunLoader();
156 Fatal("AliITSVertexer","Run Loader not found");
158 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
160 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
161 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
162 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
165 //______________________________________________________________________
166 void AliITSVertexer::WriteCurrentVertex(){
167 // Write the current AliVertex object to file fOutFile
168 AliRunLoader *rl = AliRunLoader::GetRunLoader();
169 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
170 fCurrentVertex->SetName("Vertex");
171 // const char * name = fCurrentVertex->GetName();
172 // itsLoader->SetVerticesContName(name);
173 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
174 rc = itsLoader->WriteVertices();
177 //______________________________________________________________________
178 void AliITSVertexer::FindVertices(){
179 // computes the vertices of the events in the range FirstEvent - LastEvent
181 AliRunLoader *rl = AliRunLoader::GetRunLoader();
182 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
183 itsloader->LoadRecPoints("read");
184 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
186 TTree* cltree = itsloader->TreeR();
187 FindVertexForCurrentEvent(cltree);
189 WriteCurrentVertex();
192 AliDebug(1,Form("Vertex not found for event %d",i));