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),
33 // Default Constructor
35 SetMinTrackletsForPilup();
36 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
39 //______________________________________________________________________
40 AliITSVertexer::~AliITSVertexer() {
42 if(fLadders) delete [] fLadders;
45 //______________________________________________________________________
46 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
47 // Invokes AliITSMultReconstructor to determine the
48 // charged multiplicity in the pixel layers
49 if(fMult){delete fMult; fMult = 0;}
51 if(!fCurrentVertex)success=kFALSE;
52 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
54 // get the FastOr bit mask
55 TBits fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
57 AliITSMultReconstructor multReco;
60 AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
61 AliWarning("Just counting the number of cluster-fired chips on the SPD layers");
62 if (!itsClusterTree) {
63 AliError(" Invalid ITS cluster tree !\n");
66 multReco.LoadClusterFiredChips(itsClusterTree);
67 Short_t nfcL1 = multReco.GetNFiredChips(0);
68 Short_t nfcL2 = multReco.GetNFiredChips(1);
69 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,nfcL1,nfcL2,fastOrFiredMap);
73 if (!itsClusterTree) {
74 AliError(" Invalid ITS cluster tree !\n");
78 fCurrentVertex->GetXYZ(vtx);
80 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
81 multReco.SetHistOn(kFALSE);
82 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
83 Int_t notracks=multReco.GetNTracklets();
84 Float_t *tht = new Float_t [notracks];
85 Float_t *phi = new Float_t [notracks];
86 Float_t *dphi = new Float_t [notracks];
87 Int_t *labels = new Int_t[notracks];
88 Int_t *labelsL2 = new Int_t[notracks];
89 for(Int_t i=0;i<multReco.GetNTracklets();i++){
90 tht[i] = multReco.GetTracklet(i)[0];
91 phi[i] = multReco.GetTracklet(i)[1];
92 dphi[i] = multReco.GetTracklet(i)[2];
93 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[3]);
94 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
96 Int_t nosingleclus=multReco.GetNSingleClusters();
97 Float_t *ths = new Float_t [nosingleclus];
98 Float_t *phs = new Float_t [nosingleclus];
99 for(Int_t i=0;i<nosingleclus;i++){
100 ths[i] = multReco.GetCluster(i)[0];
101 phs[i] = multReco.GetCluster(i)[1];
103 Short_t nfcL1 = multReco.GetNFiredChips(0);
104 Short_t nfcL2 = multReco.GetNFiredChips(1);
105 fMult = new AliMultiplicity(notracks,tht,phi,dphi,labels,labelsL2,nosingleclus,ths,phs,nfcL1,nfcL2,fastOrFiredMap);
118 //______________________________________________________________________
119 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
120 // Calculates the array of ladders on layer 2 to be used with a
121 // given ladder on layer 1
123 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
124 if(fLadders) delete [] fLadders;
125 fLadders=new UShort_t[ladtot1];
128 Double_t pos1[3],pos2[3];
129 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
130 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
131 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
132 if(phi0<0) phi0+=2*TMath::Pi();
133 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
134 AliITSgeomTGeo::GetTranslation(mod2,pos2);
135 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
136 if(phi2<0) phi2+=2*TMath::Pi();
137 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
139 for(Int_t i= 0; i<ladtot1;i++){
140 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
142 AliITSgeomTGeo::GetTranslation(modlad,posmod);
143 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
144 if(phimod<0) phimod+=2*TMath::Pi();
145 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
146 if(phi1<0) phi1+=2*TMath::Pi();
147 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
148 Double_t philad1=phi0-phi1;
150 Double_t ladder1=(philad1)/(deltaPhi) +1.;
151 if(ladder1<1){ladder1=40+ladder1;}
152 lad1=int(ladder1+0.5);
157 #include "AliRunLoader.h"
159 //______________________________________________________________________
160 void AliITSVertexer::Init(TString filename){
161 // Initialize the vertexer in case of
162 // analysis of an entire file
163 AliRunLoader *rl = AliRunLoader::Instance();
165 Fatal("AliITSVertexer","Run Loader not found");
167 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
169 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
170 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
171 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
174 //______________________________________________________________________
175 void AliITSVertexer::WriteCurrentVertex(){
176 // Write the current AliVertex object to file fOutFile
177 AliRunLoader *rl = AliRunLoader::Instance();
178 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
179 fCurrentVertex->SetName("Vertex");
180 // const char * name = fCurrentVertex->GetName();
181 // itsLoader->SetVerticesContName(name);
182 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
183 rc = itsLoader->WriteVertices();
186 //______________________________________________________________________
187 void AliITSVertexer::FindVertices(){
188 // computes the vertices of the events in the range FirstEvent - LastEvent
190 AliRunLoader *rl = AliRunLoader::Instance();
191 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
192 itsloader->LoadRecPoints("read");
193 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
195 TTree* cltree = itsloader->TreeR();
196 FindVertexForCurrentEvent(cltree);
198 WriteCurrentVertex();
201 AliDebug(1,Form("Vertex not found for event %d",i));