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
62 Int_t nparticles=gAlice->GetEvent(0);
65 AliITSDetType *iDetType=ITS->DetType(0);
66 AliITSsegmentationSPD *seg0=(AliITSsegmentationSPD*)iDetType->GetSegmentationModel();
67 TClonesArray *dig0 = ITS->DigitsAddress(0);
68 TClonesArray *recp0 = ITS->ClustersAddress(0);
69 AliITSClusterFinderSPD *rec0=new AliITSClusterFinderSPD(seg0,dig0,recp0);
70 ITS->SetReconstructionModel(0,rec0);
72 //printf("SPD dimensions %f %f \n",seg0->Dx(),seg0->Dz());
73 //printf("SPD npixels %d %d \n",seg0->Npz(),seg0->Npx());
78 AliITSDetType *iDetType=ITS->DetType(1);
79 AliITSgeom *geom = ITS->GetITSgeom();
81 AliITSsegmentationSDD *seg1=(AliITSsegmentationSDD*)iDetType->GetSegmentationModel();
82 if (!seg1) seg1 = new AliITSsegmentationSDD(geom);
83 AliITSresponseSDD *res1 = (AliITSresponseSDD*)iDetType->GetResponseModel();
84 if (!res1) res1=new AliITSresponseSDD();
86 Float_t baseline,noise;
87 res1->GetNoiseParam(noise,baseline);
88 Float_t noise_after_el = res1->GetNoiseAfterElectronics();
89 Float_t thres = baseline;
90 thres += (4.*noise_after_el); // TB // (4.*noise_after_el);
91 printf("thres %f\n",thres);
94 TClonesArray *dig1 = ITS->DigitsAddress(1);
95 TClonesArray *recp1 = ITS->ClustersAddress(1);
96 AliITSClusterFinderSDD *rec1=new AliITSClusterFinderSDD(seg1,res1,dig1,recp1);
97 rec1->SetCutAmplitude((int)thres);
98 ITS->SetReconstructionModel(1,rec1);
103 AliITSDetType *iDetType=ITS->DetType(2);
104 AliITSsegmentationSSD *seg2=(AliITSsegmentationSSD*)iDetType->GetSegmentationModel();
105 TClonesArray *dig2 = ITS->DigitsAddress(2);
106 AliITSClusterFinderSSD *rec2=new AliITSClusterFinderSSD(seg2,dig2);
107 ITS->SetReconstructionModel(2,rec2);
109 //printf("SSD dimensions %f %f \n",seg2->Dx(),seg2->Dz());
110 //printf("SSD nstrips %d %d \n",seg2->Npz(),seg2->Npx());
118 cout << "Looking for clusters...\n";
122 if(!gAlice->TreeR()) gAlice->MakeTree("R");
124 ITS->MakeBranch("R");
126 for (int nev=evNumber1; nev<= evNumber2; nev++) {
128 nparticles = gAlice->GetEvent(nev);
129 gAlice->SetEvent(nev);
130 if(!gAlice->TreeR()) gAlice-> MakeTree("R");
131 ITS->MakeBranch("R");
133 cout << "nev " <<nev<<endl;
134 cout << "nparticles " <<nparticles<<endl;
135 if (nev < evNumber1) continue;
136 if (nparticles <= 0) return;
140 ITS->DigitsToRecPoints(nev,last_entry,"All");
141 //ITS->DigitsToRecPoints(nev,last_entry,"SPD");
142 timer.Stop(); timer.Print();