2 #include "AliMultiplicity.h"
3 #include "AliITSgeomTGeo.h"
4 #include "AliITSVertexer.h"
5 #include "AliITSLoader.h"
6 #include "AliITSMultReconstructor.h"
7 #include "AliITSRecPointContainer.h"
8 #include "AliRunLoader.h"
10 const Float_t AliITSVertexer::fgkPipeRadius = 3.0;
12 ClassImp(AliITSVertexer)
14 //////////////////////////////////////////////////////////////////////
15 // Base class for primary vertex reconstruction //
16 // AliESDVertexer is a class for full 3D primary vertex finding //
17 // derived classes: AliITSvertexer3D, AliITSVertexerZ. //
18 // AliITSVertexerCosmics //
19 //////////////////////////////////////////////////////////////////////
23 //______________________________________________________________________
24 AliITSVertexer::AliITSVertexer():AliVertexer(),
27 fComputeMultiplicity(kFALSE),
29 fMinTrackletsForPilup(0),
38 // Default Constructor
40 SetMinTrackletsForPilup();
41 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
44 //______________________________________________________________________
45 AliITSVertexer::~AliITSVertexer() {
47 if(fLadders) delete [] fLadders;
55 //______________________________________________________________________
56 void AliITSVertexer::ResetVertex(){
57 // Resets vertex related data members
59 if(fVertArray) delete []fVertArray;
68 //______________________________________________________________________
69 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
70 // Invokes AliITSMultReconstructor to determine the
71 // charged multiplicity in the pixel layers
72 if(fMult){delete fMult; fMult = 0;}
75 Bool_t cosmics=kFALSE;
76 if(!fCurrentVertex)success=kFALSE;
77 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
78 if(fCurrentVertex && strstr(fCurrentVertex->GetTitle(),"cosmics")) {
83 // get the FastOr bit mask
84 TBits fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
85 TBits firedChipMap = fDetTypeRec->GetFiredChipMap(itsClusterTree);
87 AliITSMultReconstructor multReco;
91 AliDebug(1,"Tracklets multiplicity not determined because the primary vertex was not found");
92 AliDebug(1,"Just counting the number of cluster-fired chips on the SPD layers");
94 if (!itsClusterTree) {
95 AliError(" Invalid ITS cluster tree !\n");
98 multReco.LoadClusterFiredChips(itsClusterTree);
99 Short_t nfcL1 = multReco.GetNFiredChips(0);
100 Short_t nfcL2 = multReco.GetNFiredChips(1);
101 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,0,0,nfcL1,nfcL2,fastOrFiredMap);
102 fMult->SetFiredChipMap(firedChipMap);
103 AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
104 fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,itsClusterTree));
105 for(Int_t kk=2;kk<=6;kk++){
106 fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
111 if (!itsClusterTree) {
112 AliError(" Invalid ITS cluster tree !\n");
116 fCurrentVertex->GetXYZ(vtx);
118 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
119 multReco.SetHistOn(kFALSE);
120 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
121 Int_t notracks=multReco.GetNTracklets();
122 Float_t *tht = new Float_t [notracks];
123 Float_t *phi = new Float_t [notracks];
124 Float_t *dtht = new Float_t [notracks];
125 Float_t *dphi = new Float_t [notracks];
126 Int_t *labels = new Int_t[notracks];
127 Int_t *labelsL2 = new Int_t[notracks];
128 for(Int_t i=0;i<multReco.GetNTracklets();i++){
129 tht[i] = multReco.GetTracklet(i)[0];
130 phi[i] = multReco.GetTracklet(i)[1];
131 dtht[i] = multReco.GetTracklet(i)[3];
132 dphi[i] = multReco.GetTracklet(i)[2];
133 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
134 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[5]);
136 Int_t nosingleclus=multReco.GetNSingleClusters();
137 Float_t *ths = new Float_t [nosingleclus];
138 Float_t *phs = new Float_t [nosingleclus];
139 Int_t *labelss = new Int_t [nosingleclus];
140 for(Int_t i=0;i<nosingleclus;i++){
141 ths[i] = multReco.GetCluster(i)[0];
142 phs[i] = multReco.GetCluster(i)[1];
143 labelss[i] = (Int_t)multReco.GetCluster(i)[2];
145 Short_t nfcL1 = multReco.GetNFiredChips(0);
146 Short_t nfcL2 = multReco.GetNFiredChips(1);
147 fMult = new AliMultiplicity(notracks,tht,phi,dtht,dphi,labels,labelsL2,nosingleclus,ths,phs,labelss,nfcL1,nfcL2,fastOrFiredMap);
148 fMult->SetFiredChipMap(firedChipMap);
149 AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
150 fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,itsClusterTree));
151 for(Int_t kk=2;kk<=6;kk++){
152 fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
167 //______________________________________________________________________
168 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
169 // Calculates the array of ladders on layer 2 to be used with a
170 // given ladder on layer 1
171 if(ladwid == fLadOnLay2 && fLadders)return;
173 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
174 if(fLadders) delete [] fLadders;
175 fLadders=new UShort_t[ladtot1];
178 Double_t pos1[3],pos2[3];
179 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
180 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
181 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
182 if(phi0<0) phi0+=2*TMath::Pi();
183 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
184 AliITSgeomTGeo::GetTranslation(mod2,pos2);
185 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
186 if(phi2<0) phi2+=2*TMath::Pi();
187 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
189 for(Int_t i= 0; i<ladtot1;i++){
190 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
192 AliITSgeomTGeo::GetTranslation(modlad,posmod);
193 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
194 if(phimod<0) phimod+=2*TMath::Pi();
195 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
196 if(phi1<0) phi1+=2*TMath::Pi();
197 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
198 Double_t philad1=phi0-phi1;
200 Double_t ladder1=(philad1)/(deltaPhi) +1.;
201 if(ladder1<1){ladder1=40+ladder1;}
202 lad1=int(ladder1+0.5);
208 //______________________________________________________________________
209 void AliITSVertexer::Init(TString filename){
210 // Initialize the vertexer in case of
211 // analysis of an entire file
212 AliRunLoader *rl = AliRunLoader::Instance();
214 AliFatal("Run Loader not found");
217 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
219 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
220 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
221 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
224 //______________________________________________________________________
225 void AliITSVertexer::WriteCurrentVertex(){
226 // Write the current AliVertex object to file fOutFile
227 AliRunLoader *rl = AliRunLoader::Instance();
228 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
229 fCurrentVertex->SetName("Vertex");
230 // const char * name = fCurrentVertex->GetName();
231 // itsLoader->SetVerticesContName(name);
232 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
233 rc = itsLoader->WriteVertices();
236 //______________________________________________________________________
237 void AliITSVertexer::FindVertices(){
238 // computes the vertices of the events in the range FirstEvent - LastEvent
240 AliRunLoader *rl = AliRunLoader::Instance();
241 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
242 itsloader->LoadRecPoints("read");
243 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
245 TTree* cltree = itsloader->TreeR();
246 FindVertexForCurrentEvent(cltree);
248 WriteCurrentVertex();
251 AliDebug(1,Form("Vertex not found for event %d",i));