//_____________________________________________________________________________
Int_t amsvmc_MCStack::GetCurrentParentTrackNumber() const
{
/// \return The current track parent ID.
TParticle* current = GetCurrentTrack();
if (current)
return current->GetFirstMother();
else
return -1;
}
Int_t TOFquickanal(Int_t eventNumber = 0)
{
/////////////////////////////////////////////////////////////////////////
// This macro is a small example of a ROOT macro
// illustrating how to read the output of GALICE
// and fill some histograms concerning the TOF Hit Tree.
//
// Root > .L TOFquickanal.C //this loads the macro in memory
// Root > TOFquickanal(); //by default process first event
// Root > TOFquickanal(2); //process third event
//Begin_Html
/*
<img src="picts/TOFquickanal.gif">
*/
//End_Html
//
// Author: F. Pierella , Bologna University 12-04-2001
// Updated to the new I/O by: A. De Caro, C. Zampolli
/////////////////////////////////////////////////////////////////////////
// Dynamically link some shared libs
if (gClassTable->GetID("AliRun") < 0) {
gROOT->LoadMacro("loadlibs.C");
loadlibs();
}
Int_t rc = 0;
AliRunLoader *rl =AliRunLoader::Open("galice.root",AliConfig::GetDefaultEventFolderName(),"update");
if (!rl)
{
cerr << "Can't load RunLoader from file!\n";
rc = 1;
return rc;
}
rl->LoadgAlice();
gAlice=rl->GetAliRun();
if (!gAlice)
{
cerr << "<TOFquickanal> AliRun object not found on file \n";
rc = 2;
return rc;
}
// Get the pointer to the TOF detector
AliLoader *tofl = rl->GetLoader("TOFLoader");
AliTOF * tof = (AliTOF*) gAlice->GetDetector("TOF");
if (tof == 0x0 || tofl == 0x0) {
cerr << "<TOFquickanal> Can not find TOF or TOFLoader\n";
rc = 3;
return rc;
}
//=======> Create histograms
//---> Time of Flight for Primary Particles (ns)
TH1F *htofprim = new TH1F("htofprim","Time of Flight for Primary Particles",100,0.,100.);
//--->Time of Flight for Secondary Particles (ns)
TH1F *htofsec = new TH1F("htofsec","Time of Flight for Secondary Particles",100,0.,100.);
//---> r (radius) coordinate of production in the ALICE frame for secondary particles that produce at
// least one TOF-hit (cm) - cylindrical coordinate system assumed, primary plus secondary-
TH1F *hradius = new TH1F("hradius","r (radius) coordinate at the production vertex for secondary particles with at least one TOF-Hit",50,0.,500.);
//---> Momentum of primary particles that produce (at least) one TOF-hit when the hit
// is produced (Gev/c)
TH1F *htofmom = new TH1F("htofmom","Momentum of primary particles when the Hit is produced",50,0.,5.);
//---> Momentum of primary particles that produce (at least) one TOF-hit at the production vertex
// (Gev/c)
TH1F *hprodmom = new TH1F("hprodmom","Momentum of primary particles (with at least one TOF hit) at the production ",50,0.,5.);
//---> Theta of production for primary particles that produce (at least) one TOF-hit (deg)
TH1F *hprodthe = new TH1F("hprodthe","Theta of primary particles (with at least one TOF hit) at the production ",90,0.,180.);
//---> Phi of production for primary particles that produce (at least) one TOF-hit (deg)
TH1F *hprodphi = new TH1F("hprodphi","Phi of primary particles (with at least one TOF hit) at the production ",180,-180.,180.);
//---> z Coordinate of the TOF Hit (z beam axis) - primary plus secondary - (cm)
TH1F *hzcoor = new TH1F("hzcoor","z Coordinate of the TOF Hit",800,-400.,400.);
//---> Incidence Angle of the particle on the pad (or strip) (deg) - primary plus secondary -
TH1F *hincangle = new TH1F("hincangle","Incidence Angle of the particle on the strip",90,0.,180.);
printf ("Processing event %d \n", eventNumber);
rl->GetEvent(eventNumber);
// Get pointers to Alice detectors and Hits containers
tofl->LoadHits();
TTree *TH = tofl->TreeH();
tof->SetTreeAddress();
if (!TH) {
cout << "<TOFquickanal> No hit tree found" << endl;
rc = 4;
return rc;
}
// Import the Kine Tree for the event eventNumber in the file
rl->LoadHeader();
rl->LoadKinematics();
//AliStack * stack = rl->Stack();
Int_t ntracks = TH->GetEntries();
cout<<" ntracks = "<<ntracks<<endl;
AliTOFhitT0 *tofHit;
// Start loop on tracks in the hits containers
for (Int_t track=0; track<ntracks;track++) {
tof->ResetHits();
TH->GetEvent(track);
for(tofHit=(AliTOFhitT0*)tof->FirstHit(track); tofHit; tofHit=(AliTOFhitT0*)tof->NextHit()) {
Float_t toflight = tofHit->GetTof();
toflight *= 1.E+09; // conversion from s to ns
Double_t tofmom = tofHit->GetMom();
Int_t ipart = tofHit->Track();
TParticle *particle = gAlice->Particle(ipart);
if (particle->GetFirstMother() < 0) {
htofprim->Fill(toflight);
htofmom->Fill(tofmom);
} else {
htofsec->Fill(toflight);
}
Double_t zcoor = tofHit->Z();
hzcoor->Fill(zcoor);
Double_t incangle = tofHit->GetIncA();
hincangle->Fill(incangle);
Double_t xcoor = particle->Vx();
Double_t ycoor = particle->Vy();
Double_t radius = TMath::Sqrt(xcoor*xcoor+ycoor*ycoor);
if (particle->GetFirstMother() >= 0) hradius->Fill(radius);
Double_t prodmom = particle->P();
if (prodmom!=0.) {
Double_t dummy = (particle->Pz())/prodmom;
Double_t prodthe = TMath::ACos(dummy);
prodthe *= 57.29578; // conversion from rad to deg
if (particle->GetFirstMother() < 0) hprodthe->Fill(prodthe);
} // theta at production vertex
if (particle->GetFirstMother() < 0) {
hprodmom->Fill(prodmom);
Double_t dummypx = particle->Px();
Double_t dummypy = particle->Py();
Double_t prodphi = TMath::ATan2(dummypy,dummypx);
prodphi *= 57.29578; // conversion from rad to deg
hprodphi->Fill(prodphi);
} // phi at production vertex
} // close loop on TOF-hits
} // close loop on tracks in the hits containers
//Create canvas, set the view range, show histograms
TCanvas *c1 = new TCanvas("c1","Alice TOF hits quick analysis",400,10,600,700);
c1->cd();
hprodmom->Draw();
TCanvas *c2 = new TCanvas("c2","Alice TOF hits quick analysis",400,10,600,700);
c2->cd();
hprodthe->Draw();
TCanvas *c3 = new TCanvas("c3","Alice TOF hits quick analysis",400,10,600,700);
c3->cd();
hprodphi->Draw();
TCanvas *c4 = new TCanvas("c4","Alice TOF hits quick analysis",400,10,600,700);
c4->cd();
hzcoor->Draw();
TCanvas *c5 = new TCanvas("c5","Alice TOF hits quick analysis",400,10,600,700);
c5->cd();
hradius->Draw();
TCanvas *c6 = new TCanvas("c6","Alice TOF hits quick analysis",400,10,600,700);
c6->cd();
htofprim->Draw();
TCanvas *c7 = new TCanvas("c7","Alice TOF hits quick analysis",400,10,600,700);
c7->cd();
htofsec->Draw();
TCanvas *c8 = new TCanvas("c8","Alice TOF hits quick analysis",400,10,600,700);
c8->cd();
htofmom->Draw();
TCanvas *c9 = new TCanvas("c9","Alice TOF hits quick analysis",400,10,600,700);
c9->cd();
hincangle->Draw();
//tofl->UnloadHits();
//rl->UnloadHeader();
//rl->UnloadgAlice();
//rl->UnloadKinematics();
return rc;
}
