3 void ITSDigitsToClusters (Int_t evNumber1=0,Int_t evNumber2=0)
5 /////////////////////////////////////////////////////////////////////////
6 // This macro is a small example of a ROOT macro
7 // illustrating how to read the output of GALICE
8 // and do some analysis.
10 /////////////////////////////////////////////////////////////////////////
12 // Dynamically link some shared libs
14 if (gClassTable->GetID("AliRun") < 0) {
15 gROOT->LoadMacro("loadlibs.C");
23 // Connect the Root Galice file containing Geometry, Kine and Hits
25 TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject("galice.root");
26 printf("file %p\n",file);
27 if (file) file->Close();
28 file = new TFile("galice.root","UPDATE");
31 printf ("I'm after Map \n");
33 // Get AliRun object from file or create it if not on file
36 gAlice = (AliRun*)file->Get("gAlice");
37 if (gAlice) printf("AliRun object found on file\n");
38 if (!gAlice) gAlice = new AliRun("gAlice","Alice test program");
40 printf ("I'm after gAlice \n");
42 AliITS *ITS = (AliITS*) gAlice->GetModule("ITS");
45 AliITSgeom *geom = ITS->GetITSgeom();
48 // NOTE: if you foresee to have (in segmentation or response) parameter
49 // values other than the default ones, and these values are used not only in
50 // simulation but in cluster finder as well, please set them via your
51 // local Config.C - the streamer will take care of writing the correct
52 // info and you'll no longer be obliged to set them again for your cluster
53 // finder as it's done in this macro (ugly and impractical, no? )
57 // Set the models for cluster finding
61 AliITSDetType *iDetType=ITS->DetType(0);
62 AliITSsegmentationSPD *seg0=(AliITSsegmentationSPD*)iDetType->GetSegmentationModel();
63 TClonesArray *dig0 = ITS->DigitsAddress(0);
64 TClonesArray *recp0 = ITS->ClustersAddress(0);
65 AliITSClusterFinderSPD *rec0=new AliITSClusterFinderSPD(seg0,dig0,recp0);
66 ITS->SetReconstructionModel(0,rec0);
68 //printf("SPD dimensions %f %f \n",seg0->Dx(),seg0->Dz());
69 //printf("SPD npixels %d %d \n",seg0->Npz(),seg0->Npx());
74 Float_t baseline = 10.;
76 Float_t thres = baseline+3*noise;
77 printf("thresh %d\n",thres);
79 AliITSDetType *iDetType=ITS->DetType(1);
80 AliITSgeom *geom = ITS->GetITSgeom();
82 AliITSsegmentationSDD *seg1=(AliITSsegmentationSDD*)iDetType->GetSegmentationModel();
83 if (!seg1) seg1 = new AliITSsegmentationSDD(geom);
84 AliITSresponseSDD *res1 = (AliITSresponseSDD*)iDetType->GetResponseModel();
85 if (!res1) res1=new AliITSresponseSDD();
86 res1->SetMagicValue(900.);
87 Float_t magic = res1->MagicValue();
88 Float_t top = res1->MaxAdc();
90 res1->SetNoiseParam(noise,baseline);
92 res1->GetNoiseParam(n,b);
93 printf("SDD: noise baseline %f %f zs option %s data type %s\n",n,b,res1->ZeroSuppOption(),res1->DataType());
94 printf("SDD: DriftSpeed %f TopValue %f\n",res1->DriftSpeed(),res1->MagicValue());
96 res1->DiffCoeff(dif0,dif1);
97 printf("SDD: dif0 %f dif1 %f\n",dif0,dif1);
98 TClonesArray *dig1 = ITS->DigitsAddress(1);
99 TClonesArray *recp1 = ITS->ClustersAddress(1);
100 AliITSClusterFinderSDD *rec1=new AliITSClusterFinderSDD(seg1,res1,dig1,recp1);
101 rec1->SetMinNCells(6);
102 rec1->SetTimeCorr(70.);
103 rec1->SetCutAmplitude((int)thres);
104 ITS->SetReconstructionModel(1,rec1);
108 AliITSDetType *iDetType=ITS->DetType(2);
109 AliITSsegmentationSSD *seg2=(AliITSsegmentationSSD*)iDetType->GetSegmentationModel();
110 TClonesArray *dig2 = ITS->DigitsAddress(2);
111 TClonesArray *recp2 = ITS->ClustersAddress(2);
112 AliITSClusterFinderSSD *rec2=new AliITSClusterFinderSSD(seg2,dig2,recp2);
113 ITS->SetReconstructionModel(2,rec2);
115 //printf("SSD dimensions %f %f \n",seg2->Dx(),seg2->Dz());
116 //printf("SSD nstrips %d %d \n",seg2->Npz(),seg2->Npx());
124 for (int nev=evNumber1; nev<= evNumber2; nev++) {
125 Int_t nparticles = gAlice->GetEvent(nev);
126 cout << "nev " <<nev<<endl;
127 cout << "nparticles " <<nparticles<<endl;
128 if (nev < evNumber1) continue;
129 if (nparticles <= 0) return;
131 TTree *TD = gAlice->TreeD();
132 Int_t nent=TD->GetEntries();
133 printf("Found %d entries in the tree (must be one per module per event!)\n",nent);
134 //Int_t nmodules=geom->GetLastSSD();
135 //Int_t last_entry=nent-(nmodules+1);
137 ITS->DigitsToRecPoints(nev,last_entry,"All");