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 AliITSMultReconstructor multReco;
48 AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
49 AliWarning("Just counting the number of cluster-fired chips on the SPD layers");
50 if (!itsClusterTree) {
51 AliError(" Invalid ITS cluster tree !\n");
54 multReco.LoadClusterFiredChips(itsClusterTree);
55 Short_t nfcL1 = multReco.GetNFiredChips(0);
56 Short_t nfcL2 = multReco.GetNFiredChips(1);
57 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,nfcL1,nfcL2);
61 if (!itsClusterTree) {
62 AliError(" Invalid ITS cluster tree !\n");
66 fCurrentVertex->GetXYZ(vtx);
68 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
69 multReco.SetHistOn(kFALSE);
70 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
71 Int_t notracks=multReco.GetNTracklets();
72 Float_t *tht = new Float_t [notracks];
73 Float_t *phi = new Float_t [notracks];
74 Float_t *dphi = new Float_t [notracks];
75 Int_t *labels = new Int_t[notracks];
76 Int_t *labelsL2 = new Int_t[notracks];
77 for(Int_t i=0;i<multReco.GetNTracklets();i++){
78 tht[i] = multReco.GetTracklet(i)[0];
79 phi[i] = multReco.GetTracklet(i)[1];
80 dphi[i] = multReco.GetTracklet(i)[2];
81 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[3]);
82 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
84 Int_t nosingleclus=multReco.GetNSingleClusters();
85 Float_t *ths = new Float_t [nosingleclus];
86 Float_t *phs = new Float_t [nosingleclus];
87 for(Int_t i=0;i<nosingleclus;i++){
88 ths[i] = multReco.GetCluster(i)[0];
89 phs[i] = multReco.GetCluster(i)[1];
91 Short_t nfcL1 = multReco.GetNFiredChips(0);
92 Short_t nfcL2 = multReco.GetNFiredChips(1);
93 fMult = new AliMultiplicity(notracks,tht,phi,dphi,labels,labelsL2,nosingleclus,ths,phs,nfcL1,nfcL2);
106 //______________________________________________________________________
107 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
108 // Calculates the array of ladders on layer 2 to be used with a
109 // given ladder on layer 1
111 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
112 if(fLadders) delete [] fLadders;
113 fLadders=new UShort_t[ladtot1];
116 Double_t pos1[3],pos2[3];
117 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
118 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
119 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
120 if(phi0<0) phi0+=2*TMath::Pi();
121 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
122 AliITSgeomTGeo::GetTranslation(mod2,pos2);
123 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
124 if(phi2<0) phi2+=2*TMath::Pi();
125 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
127 for(Int_t i= 0; i<ladtot1;i++){
128 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
130 AliITSgeomTGeo::GetTranslation(modlad,posmod);
131 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
132 if(phimod<0) phimod+=2*TMath::Pi();
133 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
134 if(phi1<0) phi1+=2*TMath::Pi();
135 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
136 Double_t philad1=phi0-phi1;
138 Double_t ladder1=(philad1)/(deltaPhi) +1.;
139 if(ladder1<1){ladder1=40+ladder1;}
140 lad1=int(ladder1+0.5);
145 #include "AliRunLoader.h"
147 //______________________________________________________________________
148 void AliITSVertexer::Init(TString filename){
149 // Initialize the vertexer in case of
150 // analysis of an entire file
151 AliRunLoader *rl = AliRunLoader::GetRunLoader();
153 Fatal("AliITSVertexer","Run Loader not found");
155 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
157 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
158 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
159 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
162 //______________________________________________________________________
163 void AliITSVertexer::WriteCurrentVertex(){
164 // Write the current AliVertex object to file fOutFile
165 AliRunLoader *rl = AliRunLoader::GetRunLoader();
166 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
167 fCurrentVertex->SetName("Vertex");
168 // const char * name = fCurrentVertex->GetName();
169 // itsLoader->SetVerticesContName(name);
170 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
171 rc = itsLoader->WriteVertices();
174 //______________________________________________________________________
175 void AliITSVertexer::FindVertices(){
176 // computes the vertices of the events in the range FirstEvent - LastEvent
178 AliRunLoader *rl = AliRunLoader::GetRunLoader();
179 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
180 itsloader->LoadRecPoints("read");
181 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
183 TTree* cltree = itsloader->TreeR();
184 FindVertexForCurrentEvent(cltree);
186 WriteCurrentVertex();
189 AliDebug(1,Form("Vertex not found for event %d",i));