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Commit | Line | Data |
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fe4da5cc | 1 | void ITSdigit (Int_t evNumber=0) |
2 | { | |
3 | ///////////////////////////////////////////////////////////////////////// | |
4 | // This macro is a small example of a ROOT macro | |
5 | // illustrating how to read the output of GALICE | |
6 | // for the ITS digits | |
7 | // | |
8 | // Root > .L ITSdigit.C //this loads the macro in memory | |
9 | // Root > ITSdigit(); //by default process first event | |
10 | // Root > ITSdigit(2); //process third event | |
11 | //End_Html | |
12 | ///////////////////////////////////////////////////////////////////////// | |
13 | ||
14 | ||
15 | // Dynamically link some shared libs | |
16 | if (gClassTable->GetID("AliRun") < 0) { | |
17 | gSystem->Load("libGeant3Dummy.so"); // a dummy version of Geant3 | |
18 | gSystem->Load("PHOS/libPHOSdummy.so"); // the standard Alice classes | |
19 | gSystem->Load("libgalice.so"); // the standard Alice classes | |
20 | } | |
21 | ||
22 | // Connect the Root Galice file containing Geometry, Kine and Hits | |
23 | TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject("galice.root"); | |
24 | if (!file) file = new TFile("galice.root"); | |
25 | ||
26 | // Get AliRun object from file or create it if not on file | |
27 | if (!gAlice) { | |
28 | gAlice = (AliRun*)file->Get("gAlice"); | |
29 | if (gAlice) printf("AliRun object found on file\n"); | |
30 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
31 | } | |
32 | ||
33 | // Import the Kine and Hits Trees for the event evNumber in the file | |
34 | Int_t nparticles = gAlice->GetEvent(evNumber); | |
35 | if (nparticles <= 0) return; | |
36 | Float_t x,y,z,mass,e; | |
37 | Int_t nbytes = 0; | |
38 | Int_t j,hit,ipart; | |
39 | Int_t nhits; | |
40 | Int_t sector,plane; | |
41 | GParticle *particle; | |
42 | AliITSdigit *ITSdigit; | |
43 | ||
44 | // Get pointers to Alice detectors and Hits containers | |
45 | AliDetector *ITS = gAlice->GetDetector("ITS"); | |
46 | TClonesArray *Particles = gAlice->Particles(); | |
47 | if (ITS) TClonesArray *ITSdigits = ITS->Digits(); | |
48 | ||
49 | TTree *TD = gAlice->TreeD(); | |
50 | Int_t nent = TD->GetEntries(); | |
51 | ||
52 | printf("Found %d entries in the tree (must be one per event!)\n",nent); | |
53 | ||
54 | for (Int_t dig=0; dig<nent; dig++) { | |
55 | gAlice->ResetDigits(); | |
56 | nbytes += TD->GetEvent(dig); | |
57 | if (ITS) { | |
58 | Int_t ndigits = ITSdigits->GetEntriesFast(); | |
59 | printf("Found %d digits\n",ndigits); | |
60 | for (Int_t digit=0;digit<ndigits;digit++) { | |
61 | ITSdigit = (AliITSdigit*)ITSdigits->UncheckedAt(digit); | |
62 | printf("%d %d %d %d \n",ITSdigit->fEvent,ITSdigit->fLayer,ITSdigit->fDet,ITSdigit->fNoverl); | |
63 | } | |
64 | } | |
65 | } | |
66 | } |