From: alla <alla@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Tue, 17 Oct 2006 05:53:52 +0000 (+0000)
Subject: macros for reading RecPoints
X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=commitdiff_plain;h=e9f4d29d1a91179945e1a236b0fc642251809fc1

macros for reading RecPoints
---

diff --git a/START/readRec.C b/START/readRec.C
new file mode 100644
index 00000000000..362301c80b6
--- /dev/null
+++ b/START/readRec.C
@@ -0,0 +1,97 @@
+void readRec() 
+{
+  //read START RecPoints and plots histos 
+
+  // Dynamically link some shared libs
+  /*  if (gClassTable->GetID("AliRun") < 0) {
+    gROOT->LoadMacro("loadlibs.C");
+    loadlibs();
+  }
+  */
+    char filename[100];
+    sprintf(filename,"galice.root");
+    AliRunLoader* rl = AliRunLoader::Open("galice.root",AliConfig::GetDefaultEventFolderName(),"read");
+    if (rl == 0x0)
+   {
+     cerr<<"Can not open session for file galice.root\n";
+     return;
+   }
+    
+    rl->LoadgAlice();
+    gAlice = rl->GetAliRun();
+    
+    AliSTART* START  = (AliSTART *)gAlice->GetDetector("START");
+    
+    rl->LoadHeader();
+    Int_t retval;
+    AliLoader* lstart = rl->GetLoader("STARTLoader");
+
+  Int_t iNevents=rl->GetNumberOfEvents();
+  cout<<"  nevents   "<<iNevents<<endl;
+
+
+  TH1F *hBestTimeC = new TH1F("hBestTimeC","First time Cside",
+				  100,12.,13.);
+  TH1F *hBestTimeA = new TH1F("hBestTimeA","First time Aside",100,12.,13.);
+  TH1F *hMean= new TH1F("hMean"," T0 ",100,12.,13.);
+  TH1F *hAcc = new TH1F("hAcc","rec - real vertex",100,-10,10);
+				 
+  TH1F *hRealVertex = new TH1F("hRealVertex","Real Vertex",100,-15,15);
+  
+  TH1F *hVertex = new TH1F("hVertex","Z position of vertex",   100,-15,15);
+  AliSTARTRecPoint *fRec   ; // digits
+  fRec = new AliSTARTRecPoint();
+
+ // Event ------------------------- LOOP  
+  for (Int_t ievent=0; ievent<iNevents; ievent++){
+    rl->GetEvent(ievent);
+
+    AliHeader *header = gAlice->GetHeader();
+    AliGenEventHeader* genHeader = header->GenEventHeader();
+    TArrayF *o = new TArrayF(3); 
+    genHeader->PrimaryVertex(*o);
+    Float_t zRealVertex=o->At(2);
+    hRealVertex->Fill( zRealVertex);
+
+    lstart->LoadRecPoints("READ");
+    TTree *recTree =  lstart->TreeR();
+    TBranch *brRec=recTree->GetBranch("START");
+    AliSTARTRecPoint *fRec = new AliSTARTRecPoint();
+    if (brRec) {
+      brRec->SetAddress(&fRec);
+    }else{
+      cerr<<"EXEC Branch START Recpoints not found"<<endl;
+      return;
+    }
+    brRec->GetEntry(0);
+    Int_t   mean = fRec->GetMeanTime();
+    hMean->Fill(mean/1000.);
+    Int_t   besttimeleft = fRec->GetBestTimeLeft();
+    Int_t   besttimeright = fRec->GetBestTimeRight();
+    hBestTimeC->Fill(0.001 * besttimeright);
+    hBestTimeA->Fill(0.001 * besttimeleft );
+    Float_t vertex= fRec->GetVertex();
+    cout<<ievent<<" "<<mean<<" real vertex "<< zRealVertex<<" vertex "<<vertex<<
+      " a "<< besttimeleft<<" c "<< besttimeright<<endl;
+    hAcc->Fill(zRealVertex-vertex/2.);
+    hVertex->Fill(vertex/2.);
+  }
+  Hfile = new TFile("FigRec.root","RECREATE","Histograms for START 
+digits");
+  printf("Writting histograms to root file \n");
+  Hfile->cd();
+  //Create a canvas, set the view range, show histograms
+  gStyle->SetOptStat(111111);
+  //  TCanvas *c1 = new TCanvas("c1","Alice START Time ",400,10,600,600);
+ //  hTimediff->Write();
+  hBestTimeC->Write(); 
+  hBestTimeA ->Write(); 
+  hVertex->Write();
+  hRealVertex->Write();
+  hAcc->Write();  
+ hMean->Write();
+} // end of macro
+
+
+
+