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(),
27 fMinTrackletsForPilup(0),
36 // Default Constructor
38 SetMinTrackletsForPilup();
39 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
42 //______________________________________________________________________
43 AliITSVertexer::~AliITSVertexer() {
45 if(fLadders) delete [] fLadders;
53 //______________________________________________________________________
54 void AliITSVertexer::ResetVertex(){
55 // Resets vertex related data members
57 if(fVertArray) delete []fVertArray;
66 //______________________________________________________________________
67 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
68 // Invokes AliITSMultReconstructor to determine the
69 // charged multiplicity in the pixel layers
70 if(fMult){delete fMult; fMult = 0;}
72 Bool_t cosmics=kFALSE;
73 if(!fCurrentVertex)success=kFALSE;
74 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
75 if(fCurrentVertex && strstr(fCurrentVertex->GetTitle(),"cosmics")) {
80 // get the FastOr bit mask
81 TBits fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
82 TBits firedChipMap = fDetTypeRec->GetFiredChipMap(itsClusterTree);
84 AliITSMultReconstructor multReco;
88 AliDebug(1,"Tracklets multiplicity not determined because the primary vertex was not found");
89 AliDebug(1,"Just counting the number of cluster-fired chips on the SPD layers");
91 if (!itsClusterTree) {
92 AliError(" Invalid ITS cluster tree !\n");
95 multReco.LoadClusterFiredChips(itsClusterTree);
96 Short_t nfcL1 = multReco.GetNFiredChips(0);
97 Short_t nfcL2 = multReco.GetNFiredChips(1);
98 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,0,nfcL1,nfcL2,fastOrFiredMap);
99 fMult->SetFiredChipMap(firedChipMap);
100 AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
101 fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,itsClusterTree));
102 for(Int_t kk=2;kk<=6;kk++){
103 fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
108 if (!itsClusterTree) {
109 AliError(" Invalid ITS cluster tree !\n");
113 fCurrentVertex->GetXYZ(vtx);
115 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
116 multReco.SetHistOn(kFALSE);
117 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
118 Int_t notracks=multReco.GetNTracklets();
119 Float_t *tht = new Float_t [notracks];
120 Float_t *phi = new Float_t [notracks];
121 Float_t *dtht = new Float_t [notracks];
122 Float_t *dphi = new Float_t [notracks];
123 Int_t *labels = new Int_t[notracks];
124 Int_t *labelsL2 = new Int_t[notracks];
125 for(Int_t i=0;i<multReco.GetNTracklets();i++){
126 tht[i] = multReco.GetTracklet(i)[0];
127 phi[i] = multReco.GetTracklet(i)[1];
128 dtht[i] = multReco.GetTracklet(i)[3];
129 dphi[i] = multReco.GetTracklet(i)[2];
130 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
131 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[5]);
133 Int_t nosingleclus=multReco.GetNSingleClusters();
134 Float_t *ths = new Float_t [nosingleclus];
135 Float_t *phs = new Float_t [nosingleclus];
136 for(Int_t i=0;i<nosingleclus;i++){
137 ths[i] = multReco.GetCluster(i)[0];
138 phs[i] = multReco.GetCluster(i)[1];
140 Short_t nfcL1 = multReco.GetNFiredChips(0);
141 Short_t nfcL2 = multReco.GetNFiredChips(1);
142 fMult = new AliMultiplicity(notracks,tht,phi,dtht,dphi,labels,labelsL2,nosingleclus,ths,phs,nfcL1,nfcL2,fastOrFiredMap);
143 fMult->SetFiredChipMap(firedChipMap);
144 AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
145 fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,itsClusterTree));
146 for(Int_t kk=2;kk<=6;kk++){
147 fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
161 //______________________________________________________________________
162 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
163 // Calculates the array of ladders on layer 2 to be used with a
164 // given ladder on layer 1
166 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
167 if(fLadders) delete [] fLadders;
168 fLadders=new UShort_t[ladtot1];
171 Double_t pos1[3],pos2[3];
172 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
173 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
174 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
175 if(phi0<0) phi0+=2*TMath::Pi();
176 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
177 AliITSgeomTGeo::GetTranslation(mod2,pos2);
178 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
179 if(phi2<0) phi2+=2*TMath::Pi();
180 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
182 for(Int_t i= 0; i<ladtot1;i++){
183 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
185 AliITSgeomTGeo::GetTranslation(modlad,posmod);
186 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
187 if(phimod<0) phimod+=2*TMath::Pi();
188 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
189 if(phi1<0) phi1+=2*TMath::Pi();
190 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
191 Double_t philad1=phi0-phi1;
193 Double_t ladder1=(philad1)/(deltaPhi) +1.;
194 if(ladder1<1){ladder1=40+ladder1;}
195 lad1=int(ladder1+0.5);
200 #include "AliRunLoader.h"
202 //______________________________________________________________________
203 void AliITSVertexer::Init(TString filename){
204 // Initialize the vertexer in case of
205 // analysis of an entire file
206 AliRunLoader *rl = AliRunLoader::Instance();
208 Fatal("AliITSVertexer","Run Loader not found");
210 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
212 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
213 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
214 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
217 //______________________________________________________________________
218 void AliITSVertexer::WriteCurrentVertex(){
219 // Write the current AliVertex object to file fOutFile
220 AliRunLoader *rl = AliRunLoader::Instance();
221 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
222 fCurrentVertex->SetName("Vertex");
223 // const char * name = fCurrentVertex->GetName();
224 // itsLoader->SetVerticesContName(name);
225 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
226 rc = itsLoader->WriteVertices();
229 //______________________________________________________________________
230 void AliITSVertexer::FindVertices(){
231 // computes the vertices of the events in the range FirstEvent - LastEvent
233 AliRunLoader *rl = AliRunLoader::Instance();
234 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
235 itsloader->LoadRecPoints("read");
236 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
238 TTree* cltree = itsloader->TreeR();
239 FindVertexForCurrentEvent(cltree);
241 WriteCurrentVertex();
244 AliDebug(1,Form("Vertex not found for event %d",i));