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(),
26 fMinTrackletsForPilup(0),
35 // Default Constructor
37 SetMinTrackletsForPilup();
38 for(Int_t i=0; i<kNSPDMod;i++) fUseModule[i]=kTRUE;
41 //______________________________________________________________________
42 AliITSVertexer::~AliITSVertexer() {
44 if(fLadders) delete [] fLadders;
52 //______________________________________________________________________
53 void AliITSVertexer::ResetVertex(){
54 // Resets vertex related data members
56 if(fVertArray) delete []fVertArray;
65 //______________________________________________________________________
66 void AliITSVertexer::FindMultiplicity(TTree *itsClusterTree){
67 // Invokes AliITSMultReconstructor to determine the
68 // charged multiplicity in the pixel layers
69 if(fMult){delete fMult; fMult = 0;}
71 Bool_t cosmics=kFALSE;
72 if(!fCurrentVertex)success=kFALSE;
73 if(fCurrentVertex && fCurrentVertex->GetNContributors()<1)success=kFALSE;
74 if(fCurrentVertex && strstr(fCurrentVertex->GetTitle(),"cosmics")) {
79 // get the FastOr bit mask
80 TBits fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
82 AliITSMultReconstructor multReco;
86 AliWarning("Tracklets multiplicity not determined because the primary vertex was not found");
87 AliWarning("Just counting the number of cluster-fired chips on the SPD layers");
89 if (!itsClusterTree) {
90 AliError(" Invalid ITS cluster tree !\n");
93 multReco.LoadClusterFiredChips(itsClusterTree);
94 Short_t nfcL1 = multReco.GetNFiredChips(0);
95 Short_t nfcL2 = multReco.GetNFiredChips(1);
96 fMult = new AliMultiplicity(0,0,0,0,0,0,0,0,0,0,nfcL1,nfcL2,fastOrFiredMap);
100 if (!itsClusterTree) {
101 AliError(" Invalid ITS cluster tree !\n");
105 fCurrentVertex->GetXYZ(vtx);
107 for(Int_t i=0;i<3;i++)vtxf[i]=vtx[i];
108 multReco.SetHistOn(kFALSE);
109 multReco.Reconstruct(itsClusterTree,vtxf,vtxf);
110 Int_t notracks=multReco.GetNTracklets();
111 Float_t *tht = new Float_t [notracks];
112 Float_t *phi = new Float_t [notracks];
113 Float_t *dtht = new Float_t [notracks];
114 Float_t *dphi = new Float_t [notracks];
115 Int_t *labels = new Int_t[notracks];
116 Int_t *labelsL2 = new Int_t[notracks];
117 for(Int_t i=0;i<multReco.GetNTracklets();i++){
118 tht[i] = multReco.GetTracklet(i)[0];
119 phi[i] = multReco.GetTracklet(i)[1];
120 dtht[i] = multReco.GetTracklet(i)[3];
121 dphi[i] = multReco.GetTracklet(i)[2];
122 labels[i] = static_cast<Int_t>(multReco.GetTracklet(i)[4]);
123 labelsL2[i] = static_cast<Int_t>(multReco.GetTracklet(i)[5]);
125 Int_t nosingleclus=multReco.GetNSingleClusters();
126 Float_t *ths = new Float_t [nosingleclus];
127 Float_t *phs = new Float_t [nosingleclus];
128 for(Int_t i=0;i<nosingleclus;i++){
129 ths[i] = multReco.GetCluster(i)[0];
130 phs[i] = multReco.GetCluster(i)[1];
132 Short_t nfcL1 = multReco.GetNFiredChips(0);
133 Short_t nfcL2 = multReco.GetNFiredChips(1);
134 fMult = new AliMultiplicity(notracks,tht,phi,dtht,dphi,labels,labelsL2,nosingleclus,ths,phs,nfcL1,nfcL2,fastOrFiredMap);
148 //______________________________________________________________________
149 void AliITSVertexer::SetLaddersOnLayer2(Int_t ladwid){
150 // Calculates the array of ladders on layer 2 to be used with a
151 // given ladder on layer 1
153 Int_t ladtot1=AliITSgeomTGeo::GetNLadders(1);
154 if(fLadders) delete [] fLadders;
155 fLadders=new UShort_t[ladtot1];
158 Double_t pos1[3],pos2[3];
159 Int_t mod1=AliITSgeomTGeo::GetModuleIndex(2,1,1);
160 AliITSgeomTGeo::GetTranslation(mod1,pos1); // position of the module in the MRS
161 Double_t phi0=TMath::ATan2(pos1[1],pos1[0]);
162 if(phi0<0) phi0+=2*TMath::Pi();
163 Int_t mod2=AliITSgeomTGeo::GetModuleIndex(2,2,1);
164 AliITSgeomTGeo::GetTranslation(mod2,pos2);
165 Double_t phi2=TMath::ATan2(pos2[1],pos2[0]);
166 if(phi2<0) phi2+=2*TMath::Pi();
167 Double_t deltaPhi= phi0-phi2; // phi width of a layer2 module
169 for(Int_t i= 0; i<ladtot1;i++){
170 Int_t modlad= AliITSgeomTGeo::GetModuleIndex(1,i+1,1);
172 AliITSgeomTGeo::GetTranslation(modlad,posmod);
173 Double_t phimod=TMath::ATan2(posmod[1],posmod[0]);
174 if(phimod<0) phimod+=2*TMath::Pi();
175 Double_t phi1= phimod+deltaPhi*double(fLadOnLay2);
176 if(phi1<0) phi1+=2*TMath::Pi();
177 if(phi1>2*TMath::Pi()) phi1-=2*TMath::Pi();
178 Double_t philad1=phi0-phi1;
180 Double_t ladder1=(philad1)/(deltaPhi) +1.;
181 if(ladder1<1){ladder1=40+ladder1;}
182 lad1=int(ladder1+0.5);
187 #include "AliRunLoader.h"
189 //______________________________________________________________________
190 void AliITSVertexer::Init(TString filename){
191 // Initialize the vertexer in case of
192 // analysis of an entire file
193 AliRunLoader *rl = AliRunLoader::Instance();
195 Fatal("AliITSVertexer","Run Loader not found");
197 if (fLastEvent < 0) SetLastEvent(rl->GetNumberOfEvents()-1);
199 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
200 if(!filename.Contains("default"))itsloader->SetVerticesFileName(filename);
201 if(!filename.Contains("null"))itsloader->LoadVertices("recreate");
204 //______________________________________________________________________
205 void AliITSVertexer::WriteCurrentVertex(){
206 // Write the current AliVertex object to file fOutFile
207 AliRunLoader *rl = AliRunLoader::Instance();
208 AliITSLoader* itsLoader = (AliITSLoader*) rl->GetLoader("ITSLoader");
209 fCurrentVertex->SetName("Vertex");
210 // const char * name = fCurrentVertex->GetName();
211 // itsLoader->SetVerticesContName(name);
212 Int_t rc = itsLoader->PostVertex(fCurrentVertex);
213 rc = itsLoader->WriteVertices();
216 //______________________________________________________________________
217 void AliITSVertexer::FindVertices(){
218 // computes the vertices of the events in the range FirstEvent - LastEvent
220 AliRunLoader *rl = AliRunLoader::Instance();
221 AliITSLoader* itsloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
222 itsloader->LoadRecPoints("read");
223 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
225 TTree* cltree = itsloader->TreeR();
226 FindVertexForCurrentEvent(cltree);
228 WriteCurrentVertex();
231 AliDebug(1,Form("Vertex not found for event %d",i));