6 #include "AliITSgeom.h"
7 #include "AliITSRecPoint.h"
8 #include "AliITSclusterV2.h"
12 #include "TParticle.h"
15 Int_t AliITSFindClustersV2() {
16 /****************************************************************
17 * This macro converts AliITSRecPoint(s) to AliITSclusterV2(s) *
18 ****************************************************************/
19 cerr<<"AliITSRecPoint(s) -> AliITSclusterV2(s)...\n";
21 if (gAlice) {delete gAlice; gAlice=0;}
23 TFile *in=TFile::Open("galice.root");
24 if (!in->IsOpen()) { cerr<<"Can't open galice.root !\n"; return 1; }
26 if (!(gAlice=(AliRun*)in->Get("gAlice"))) {
27 cerr<<"Can't find gAlice !\n";
32 AliITS *ITS = (AliITS*)gAlice->GetModule("ITS");
33 if (!ITS) { cerr<<"Can't find the ITS !\n"; return 3; }
34 AliITSgeom *geom=ITS->GetITSgeom();
36 TFile *out=TFile::Open("AliITSclustersV2.root","new");
38 cerr<<"Delete old AliITSclustersV2.root !\n";
43 TClonesArray *clusters=new TClonesArray("AliITSclusterV2",10000);
44 TTree *cTree=new TTree("TreeC_ITS_0","ITS clusters");
45 cTree->Branch("Clusters",&clusters);
47 TTree *pTree=gAlice->TreeR();
48 if (!pTree) { cerr<<"Can't get TreeR !\n"; return 5; }
49 TBranch *branch=pTree->GetBranch("ITSRecPoints");
50 if (!branch) { cerr<<"Can't get ITSRecPoints branch !\n"; return 6; }
51 TClonesArray *points=new TClonesArray("AliITSRecPoint",10000);
52 branch->SetAddress(&points);
54 TClonesArray &cl=*clusters;
56 Int_t nentr=(Int_t)pTree->GetEntries();
58 cerr<<"Number of entries: "<<nentr<<endl;
60 Float_t lp[5]; Int_t lab[6]; //Why can't it be inside a loop ?
62 for (Int_t i=0; i<nentr; i++) {
65 Int_t ncl=points->GetEntriesFast(); if (ncl==0){cTree->Fill();continue;}
66 Int_t lay,lad,det; geom->GetModuleId(i,lay,lad,det);
67 Float_t x,y,zshift; geom->GetTrans(lay,lad,det,x,y,zshift);
68 Double_t rot[9]; geom->GetRotMatrix(lay,lad,det,rot);
69 Double_t yshift = x*rot[0] + y*rot[1];
70 Int_t ndet=(lad-1)*geom->GetNdetectors(lay) + (det-1);
73 Float_t kmip=1; // ADC->mip normalization factor for the SDD and SSD
74 if(lay==4 || lay==3){kmip=280.;};
75 if(lay==6 || lay==5){kmip=38.;};
77 for (Int_t j=0; j<ncl; j++) {
78 AliITSRecPoint *p=(AliITSRecPoint*)points->UncheckedAt(j);
80 lp[0]=-p->GetX()-yshift; if (lay==1) lp[0]=-lp[0];
81 lp[1]=p->GetZ()+zshift;
82 lp[2]=p->GetSigmaX2();
83 lp[3]=p->GetSigmaZ2();
84 lp[4]=p->GetQ(); lp[4]/=kmip;
86 lab[0]=p->GetLabel(0);lab[1]=p->GetLabel(1);lab[2]=p->GetLabel(2);
91 TParticle *part=(TParticle*)gAlice->Particle(label);
93 while (part->P() < 0.005) {
94 Int_t m=part->GetFirstMother();
95 if (m<0) {cerr<<"Primary momentum: "<<part->P()<<endl; break;}
97 part=(TParticle*)gAlice->Particle(label);
99 if (lab[1]<0) lab[1]=label;
100 else if (lab[2]<0) lab[2]=label;
101 else cerr<<"No empty labels !\n";
104 new(cl[j]) AliITSclusterV2(lab,lp);
106 cTree->Fill(); clusters->Delete();
111 cerr<<"Number of clusters: "<<nclusters<<endl;
113 delete cTree; delete clusters; delete points;
115 delete gAlice; gAlice=0;