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