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Commit | Line | Data |
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fe4da5cc | 1 | void newanal (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 | // and fill some histograms. | |
7 | // | |
8 | // Root > .L anal.C //this loads the macro in memory | |
9 | // Root > anal(); //by default process first event | |
10 | // Root > anal(2); //process third event | |
11 | //Begin_Html | |
12 | /* | |
1439f98e | 13 | <img src="picts/anal.gif"> |
fe4da5cc | 14 | */ |
15 | //End_Html | |
16 | ///////////////////////////////////////////////////////////////////////// | |
17 | ||
18 | ||
19 | // Dynamically link some shared libs | |
20 | if (gClassTable->GetID("AliRun") < 0) { | |
21 | gROOT->LoadMacro("loadlibs.C"); | |
22 | loadlibs(); | |
23 | } | |
24 | ||
25 | // Connect the Root Galice file containing Geometry, Kine and Hits | |
26 | TFile *file = (TFile*)gROOT->GetListOfFiles()->FindObject("galice.root"); | |
27 | if (!file) file = new TFile("galice.root"); | |
28 | ||
29 | // Get AliRun object from file or create it if not on file | |
30 | if (!gAlice) { | |
31 | gAlice = (AliRun*)file->Get("gAlice"); | |
32 | if (gAlice) printf("AliRun object found on file\n"); | |
33 | if (!gAlice) gAlice = new AliRun("gAlice","Alice test program"); | |
34 | } | |
35 | ||
36 | // Import the Kine and Hits Trees for the event evNumber in the file | |
37 | Int_t nparticles = gAlice->GetEvent(evNumber); | |
38 | if (nparticles <= 0) return; | |
39 | Float_t x,y,z,mass,e; | |
40 | Int_t nbytes = 0; | |
41 | Int_t j,hit,ipart; | |
42 | Int_t nhits; | |
43 | Int_t sector,plane; | |
44 | GParticle *particle; | |
45 | ||
46 | // Get pointers to Alice detectors and Hits containers | |
47 | AliDetector *TPC = gAlice->GetDetector("TPC"); | |
48 | AliDetector *TRD = gAlice->GetDetector("TRD"); | |
49 | TClonesArray *Particles = gAlice->Particles(); | |
50 | ||
51 | Int_t ntracks = gAlice->TreeH()->GetEntries(); | |
52 | ||
53 | // Create histograms | |
54 | TH1F *hSectors = new TH1F("hSectors","Number of tracks hits per sector",75,1,76); | |
55 | TH1F *hTRD = new TH1F("hTRD","Number of planes crossed per track in TRD",6,1,7); | |
56 | TH1F *hTRDprim = new TH1F("hTRDprim","Number of planes crossed per primary track in TRD",6,1,7); | |
57 | ||
58 | // Start loop on tracks in the hits containers | |
59 | for (Int_t track=0; track<ntracks;track++) { | |
60 | if(TPC) { | |
61 | // ======>Histogram TPC | |
62 | // histogram number of tracks per sector | |
63 | for(AliTPChit* tpcHit=(AliTPChit*)TPC->FirstHit(track); tpcHit; tpcHit=(AliTPChit*)TPC->NextHit()) { | |
64 | sector = tpcHit->fPadRow; | |
65 | hSectors->Fill(sector); | |
66 | } | |
67 | } | |
68 | // =======>Histogram TRD | |
69 | // histogram number of planes crossed per track | |
70 | // same for primary tracks only | |
71 | if (TRD) { | |
72 | for(AliTRDhit* trdHit=(AliTRDhit*)TRD->FirstHit(-1); trdHit; trdHit=(AliTRDhit*)TRD->NextHit()) { | |
73 | ipart = trdHit->fTrack; | |
74 | particle = (GParticle*)Particles->UncheckedAt(ipart); | |
75 | plane = trdHit->fPlane; | |
76 | hTRD->Fill(plane); | |
77 | if (particle->GetParent() < 0) hTRDprim->Fill(plane); | |
78 | } | |
79 | } | |
80 | } | |
81 | ||
82 | //Create a canvas, set the view range, show histograms | |
83 | TCanvas *c1 = new TCanvas("c1","Alice TPC and ITS hits",400,10,600,700); | |
84 | c1->Divide(1,2); | |
85 | c1->cd(1); | |
86 | gPad->SetFillColor(33); | |
87 | hSectors->SetFillColor(42); | |
88 | hSectors->Fit("pol1"); | |
89 | c1->cd(2); | |
90 | gPad->SetFillColor(33); | |
91 | hTRD->SetFillColor(42); | |
92 | hTRD->Draw(); | |
93 | hTRDprim->SetFillColor(46); | |
94 | hTRDprim->Draw("same"); | |
95 | c1->Print("anal.ps"); | |
96 | } |