2 #include "AliMultiplicity.h"
3 #include "AliITSgeomTGeo.h"
4 #include "AliITSVertexer.h"
5 #include "AliITSLoader.h"
6 #include "AliITSMultReconstructor.h"
7 #include "AliITSRecPointContainer.h"
9 const Float_t AliITSVertexer::fgkPipeRadius = 3.0;
11 ClassImp(AliITSVertexer)
13 //////////////////////////////////////////////////////////////////////
14 // Base class for primary vertex reconstruction //
15 // AliESDVertexer is a class for full 3D primary vertex finding //
16 // derived classes: AliITSVertexerIons AliITSvertexer3D //
17 // AliITSVertexerCosmics //
18 //////////////////////////////////////////////////////////////////////
22 //______________________________________________________________________
23 AliITSVertexer::AliITSVertexer():AliVertexer(),
26 fComputeMultiplicity(kFALSE),
28 fMinTrackletsForPilup(0),
37 // Default Constructor
39 SetMinTrackletsForPilup();
40 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
43 //______________________________________________________________________
44 AliITSVertexer::~AliITSVertexer() {
46 if(fLadders) delete [] fLadders;
54 //______________________________________________________________________
55 void AliITSVertexer::ResetVertex(){
56 // Resets vertex related data members
58 if(fVertArray) delete []fVertArray;
67 //______________________________________________________________________
68 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
69 // Invokes AliITSMultReconstructor to determine the
70 // charged multiplicity in the pixel layers
71 if(fMult){delete fMult; fMult = 0;}
74 Bool_t cosmics=kFALSE;
75 if(!fCurrentVertex)success=kFALSE;
76 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
77 if(fCurrentVertex && strstr(fCurrentVertex->GetTitle(),"cosmics")) {
82 // get the FastOr bit mask
83 TBits fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
84 TBits firedChipMap = fDetTypeRec->GetFiredChipMap(itsClusterTree);
86 AliITSMultReconstructor multReco;
90 AliDebug(1,"Tracklets multiplicity not determined because the primary vertex was not found");
91 AliDebug(1,"Just counting the number of cluster-fired chips on the SPD layers");
93 if (!itsClusterTree) {
94 AliError(" Invalid ITS cluster tree !\n");
97 multReco.LoadClusterFiredChips(itsClusterTree);
98 Short_t nfcL1 = multReco.GetNFiredChips(0);
99 Short_t nfcL2 = multReco.GetNFiredChips(1);
100 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,0,0,nfcL1,nfcL2,fastOrFiredMap);
101 fMult->SetFiredChipMap(firedChipMap);
102 AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
103 fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,itsClusterTree));
104 for(Int_t kk=2;kk<=6;kk++){
105 fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
110 if (!itsClusterTree) {
111 AliError(" Invalid ITS cluster tree !\n");
115 fCurrentVertex->GetXYZ(vtx);
117 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
118 multReco.SetHistOn(kFALSE);
119 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
120 Int_t notracks=multReco.GetNTracklets();
121 Float_t *tht = new Float_t [notracks];
122 Float_t *phi = new Float_t [notracks];
123 Float_t *dtht = new Float_t [notracks];
124 Float_t *dphi = new Float_t [notracks];
125 Int_t *labels = new Int_t[notracks];
126 Int_t *labelsL2 = new Int_t[notracks];
127 for(Int_t i=0;i<multReco.GetNTracklets();i++){
128 tht[i] = multReco.GetTracklet(i)[0];
129 phi[i] = multReco.GetTracklet(i)[1];
130 dtht[i] = multReco.GetTracklet(i)[3];
131 dphi[i] = multReco.GetTracklet(i)[2];
132 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
133 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[5]);
135 Int_t nosingleclus=multReco.GetNSingleClusters();
136 Float_t *ths = new Float_t [nosingleclus];
137 Float_t *phs = new Float_t [nosingleclus];
138 Int_t *labelss = new Int_t [nosingleclus];
139 for(Int_t i=0;i<nosingleclus;i++){
140 ths[i] = multReco.GetCluster(i)[0];
141 phs[i] = multReco.GetCluster(i)[1];
142 labelss[i] = multReco.GetCluster(i)[2];
144 Short_t nfcL1 = multReco.GetNFiredChips(0);
145 Short_t nfcL2 = multReco.GetNFiredChips(1);
146 fMult = new AliMultiplicity(notracks,tht,phi,dtht,dphi,labels,labelsL2,nosingleclus,ths,phs,labelss,nfcL1,nfcL2,fastOrFiredMap);
147 fMult->SetFiredChipMap(firedChipMap);
148 AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
149 fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,itsClusterTree));
150 for(Int_t kk=2;kk<=6;kk++){
151 fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
166 //______________________________________________________________________
167 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
168 // Calculates the array of ladders on layer 2 to be used with a
169 // given ladder on layer 1
171 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
172 if(fLadders) delete [] fLadders;
173 fLadders=new UShort_t[ladtot1];
176 Double_t pos1[3],pos2[3];
177 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
178 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
179 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
180 if(phi0<0) phi0+=2*TMath::Pi();
181 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
182 AliITSgeomTGeo::GetTranslation(mod2,pos2);
183 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
184 if(phi2<0) phi2+=2*TMath::Pi();
185 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
187 for(Int_t i= 0; i<ladtot1;i++){
188 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
190 AliITSgeomTGeo::GetTranslation(modlad,posmod);
191 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
192 if(phimod<0) phimod+=2*TMath::Pi();
193 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
194 if(phi1<0) phi1+=2*TMath::Pi();
195 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
196 Double_t philad1=phi0-phi1;
198 Double_t ladder1=(philad1)/(deltaPhi) +1.;
199 if(ladder1<1){ladder1=40+ladder1;}
200 lad1=int(ladder1+0.5);
205 #include "AliRunLoader.h"
207 //______________________________________________________________________
208 void AliITSVertexer::Init(TString filename){
209 // Initialize the vertexer in case of
210 // analysis of an entire file
211 AliRunLoader *rl = AliRunLoader::Instance();
213 Fatal("AliITSVertexer","Run Loader not found");
215 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
217 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
218 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
219 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
222 //______________________________________________________________________
223 void AliITSVertexer::WriteCurrentVertex(){
224 // Write the current AliVertex object to file fOutFile
225 AliRunLoader *rl = AliRunLoader::Instance();
226 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
227 fCurrentVertex->SetName("Vertex");
228 // const char * name = fCurrentVertex->GetName();
229 // itsLoader->SetVerticesContName(name);
230 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
231 rc = itsLoader->WriteVertices();
234 //______________________________________________________________________
235 void AliITSVertexer::FindVertices(){
236 // computes the vertices of the events in the range FirstEvent - LastEvent
238 AliRunLoader *rl = AliRunLoader::Instance();
239 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
240 itsloader->LoadRecPoints("read");
241 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
243 TTree* cltree = itsloader->TreeR();
244 FindVertexForCurrentEvent(cltree);
246 WriteCurrentVertex();
249 AliDebug(1,Form("Vertex not found for event %d",i));