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(),
26 fMinTrackletsForPilup(0),
35 // Default Constructor
37 SetMinTrackletsForPilup();
38 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
41 //______________________________________________________________________
42 AliITSVertexer::~AliITSVertexer() {
44 if(fLadders) delete [] fLadders;
52 //______________________________________________________________________
53 void AliITSVertexer::ResetVertex(){
54 // Resets vertex related data members
56 if(fVertArray) delete []fVertArray;
65 //______________________________________________________________________
66 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
67 // Invokes AliITSMultReconstructor to determine the
68 // charged multiplicity in the pixel layers
69 if(fMult){delete fMult; fMult = 0;}
71 if(!fCurrentVertex)success=kFALSE;
72 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
74 // get the FastOr bit mask
75 TBits fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
77 AliITSMultReconstructor multReco;
80 AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
81 AliWarning("Just counting the number of cluster-fired chips on the SPD layers");
82 if (!itsClusterTree) {
83 AliError(" Invalid ITS cluster tree !\n");
86 multReco.LoadClusterFiredChips(itsClusterTree);
87 Short_t nfcL1 = multReco.GetNFiredChips(0);
88 Short_t nfcL2 = multReco.GetNFiredChips(1);
89 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,nfcL1,nfcL2,fastOrFiredMap);
93 if (!itsClusterTree) {
94 AliError(" Invalid ITS cluster tree !\n");
98 fCurrentVertex->GetXYZ(vtx);
100 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
101 multReco.SetHistOn(kFALSE);
102 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
103 Int_t notracks=multReco.GetNTracklets();
104 Float_t *tht = new Float_t [notracks];
105 Float_t *phi = new Float_t [notracks];
106 Float_t *dphi = new Float_t [notracks];
107 Int_t *labels = new Int_t[notracks];
108 Int_t *labelsL2 = new Int_t[notracks];
109 for(Int_t i=0;i<multReco.GetNTracklets();i++){
110 tht[i] = multReco.GetTracklet(i)[0];
111 phi[i] = multReco.GetTracklet(i)[1];
112 dphi[i] = multReco.GetTracklet(i)[2];
113 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[3]);
114 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
116 Int_t nosingleclus=multReco.GetNSingleClusters();
117 Float_t *ths = new Float_t [nosingleclus];
118 Float_t *phs = new Float_t [nosingleclus];
119 for(Int_t i=0;i<nosingleclus;i++){
120 ths[i] = multReco.GetCluster(i)[0];
121 phs[i] = multReco.GetCluster(i)[1];
123 Short_t nfcL1 = multReco.GetNFiredChips(0);
124 Short_t nfcL2 = multReco.GetNFiredChips(1);
125 fMult = new AliMultiplicity(notracks,tht,phi,dphi,labels,labelsL2,nosingleclus,ths,phs,nfcL1,nfcL2,fastOrFiredMap);
138 //______________________________________________________________________
139 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
140 // Calculates the array of ladders on layer 2 to be used with a
141 // given ladder on layer 1
143 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
144 if(fLadders) delete [] fLadders;
145 fLadders=new UShort_t[ladtot1];
148 Double_t pos1[3],pos2[3];
149 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
150 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
151 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
152 if(phi0<0) phi0+=2*TMath::Pi();
153 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
154 AliITSgeomTGeo::GetTranslation(mod2,pos2);
155 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
156 if(phi2<0) phi2+=2*TMath::Pi();
157 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
159 for(Int_t i= 0; i<ladtot1;i++){
160 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
162 AliITSgeomTGeo::GetTranslation(modlad,posmod);
163 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
164 if(phimod<0) phimod+=2*TMath::Pi();
165 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
166 if(phi1<0) phi1+=2*TMath::Pi();
167 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
168 Double_t philad1=phi0-phi1;
170 Double_t ladder1=(philad1)/(deltaPhi) +1.;
171 if(ladder1<1){ladder1=40+ladder1;}
172 lad1=int(ladder1+0.5);
177 #include "AliRunLoader.h"
179 //______________________________________________________________________
180 void AliITSVertexer::Init(TString filename){
181 // Initialize the vertexer in case of
182 // analysis of an entire file
183 AliRunLoader *rl = AliRunLoader::Instance();
185 Fatal("AliITSVertexer","Run Loader not found");
187 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
189 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
190 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
191 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
194 //______________________________________________________________________
195 void AliITSVertexer::WriteCurrentVertex(){
196 // Write the current AliVertex object to file fOutFile
197 AliRunLoader *rl = AliRunLoader::Instance();
198 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
199 fCurrentVertex->SetName("Vertex");
200 // const char * name = fCurrentVertex->GetName();
201 // itsLoader->SetVerticesContName(name);
202 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
203 rc = itsLoader->WriteVertices();
206 //______________________________________________________________________
207 void AliITSVertexer::FindVertices(){
208 // computes the vertices of the events in the range FirstEvent - LastEvent
210 AliRunLoader *rl = AliRunLoader::Instance();
211 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
212 itsloader->LoadRecPoints("read");
213 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
215 TTree* cltree = itsloader->TreeR();
216 FindVertexForCurrentEvent(cltree);
218 WriteCurrentVertex();
221 AliDebug(1,Form("Vertex not found for event %d",i));