[u/mrichter/AliRoot.git] / FMD / AliFMDBackgroundCorrection.cxx

/**************************************************************************
 * Copyright(c) 2004, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

// Thil class computes background corrections for the FMD. The correction is computed 
// in eta,phi cells and the objects stored can be put into alien to use with analysis.
// It is based on the AliFMDInput class that is used to loop over hits and primaries.
//
// Author: Hans Hjersing Dalsgaard, NBI, hans.dalsgaard@cern.ch
//
//

#include "AliSimulation.h"
#include "TStopwatch.h"
#include "iostream"
#include "TGrid.h"
#include "AliRunLoader.h"
#include "AliGeomManager.h"
#include "AliFMDGeometry.h"
#include "AliStack.h"
#include "TParticle.h"
#include "TDatabasePDG.h"
#include "TParticlePDG.h"
#include "AliRun.h"
#include "AliFMDBackgroundCorrection.h"
#include "TSystem.h"
#include "AliCDBManager.h"
#include "TTree.h"
#include "TClonesArray.h"
#include "TBranch.h"
#include "AliFMDHit.h"
#include "AliLoader.h" 
#include "AliFMD.h"
#include "AliGenEventHeader.h"
#include "AliHeader.h"
#include "TFile.h"
#include "TAxis.h"
#include "AliCDBId.h"
#include "AliCDBMetaData.h"
#include "TROOT.h"
#include "AliFMDParameters.h"
#include "AliLog.h"
#include "TList.h"
#include "AliFMDAnaParameters.h"
#include "AliFMDAnaCalibBackgroundCorrection.h"
#include "AliTrackReference.h"
#include "AliFMDStripIndex.h"

ClassImp(AliFMDBackgroundCorrection)
//_____________________________________________________________________
AliFMDBackgroundCorrection::AliFMDBackgroundCorrection() : 
  TNamed(),
  fCorrectionArray(),
  fPrimaryList()
{} 

//_____________________________________________________________________
AliFMDBackgroundCorrection::AliFMDInputBG::AliFMDInputBG(Bool_t hits_not_trackref) : 
  AliFMDInput("galice.root"),
  fPrimaryArray(),
  fHitArray(),
  fHitMap(),
  fLastTrackByStrip(),
  fPrim(0),
  fHits(0),
  fZvtxCut(0),
  fNvtxBins(0),
  fPrevTrack(-1),
  fPrevDetector(-1),
  fPrevRing('Q'),
  fPrevSec(-1),
  fNbinsEta(100)
{

  if(hits_not_trackref) {
    AddLoad(kHits);
    AddLoad(kTracks); 
  }
  else
    AddLoad(kTrackRefs);
  AddLoad(kKinematics); 
  AddLoad(kHeader);
  
  
}

//_____________________________________________________________________

void AliFMDBackgroundCorrection::GenerateBackgroundCorrection(Bool_t from_hits,
							      const Int_t nvtxbins,
							      Float_t zvtxcut, 
							      const Int_t nBinsEta, 
							      Bool_t storeInAlien, 
							      Int_t runNo,
							      Int_t endRunNo, 
							      const Char_t* filename, 
							      Bool_t simulate,
							      Int_t nEvents,
							      Bool_t inFile,
							      const Char_t* infilename) {
  
  //TGrid::Connect("alien:",0,0,"t");
  if(simulate)
    Simulate(nEvents);
  else {
    //AliCDBManager::Instance()->SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
    AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
    AliCDBManager::Instance()->SetRun(runNo);
    
#if defined(__CINT__)
    gSystem->Load("liblhapdf");
    gSystem->Load("libEGPythia6");
    gSystem->Load("libpythia6");
    gSystem->Load("libAliPythia6");
    gSystem->Load("libgeant321");
#endif
      // 
  }  
  
  //Setting up the geometry
  //-----------------------------------------------
  if (AliGeomManager::GetGeometry() == NULL)
    AliGeomManager::LoadGeometry();
  
  AliFMDGeometry* geo = AliFMDGeometry::Instance();
  geo->Init();
  geo->InitTransformations();
    
  AliInfo("Processing hits and primaries ");
  
  AliFMDInputBG input(from_hits);
  
  if(!inFile) {
  
    input.SetVtxCutZ(zvtxcut);
    input.SetNvtxBins(nvtxbins);
    input.SetNbinsEta(nBinsEta);
    input.Run();
  }
  
  AliInfo(Form("Found %d primaries and %d hits.", input.GetNprim(),input.GetNhits()));
  TObjArray* hitArray ;
  TObjArray* primaryArray;
  if(inFile) {
    TFile* infile = TFile::Open(infilename);
    hitArray     = new TObjArray();
    primaryArray = new TObjArray();
    
    for(Int_t det =1; det<=3;det++)
      {
	TObjArray* detArrayHits = new TObjArray();
	detArrayHits->SetName(Form("FMD%d",det));
	hitArray->AddAtAndExpand(detArrayHits,det);
	Int_t nRings = (det==1 ? 1 : 2);
	for(Int_t ring = 0;ring<nRings;ring++)
	  {
	    
	    Char_t ringChar = (ring == 0 ? 'I' : 'O');
	    TObjArray* vtxArrayHits = new TObjArray();
	    vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	    detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	    for(Int_t v=0; v<nvtxbins;v++)
	      {
	      
		TH2F* hHits          = (TH2F*)infile->Get(Form("hHits_FMD%d%c_vtx%d",det,ringChar,v));
		
		
	      vtxArrayHits->AddAtAndExpand(hHits,v);
	      	      
	    } 
	}
      
    }
    
    for(Int_t iring = 0; iring<2;iring++) {
      Char_t ringChar = (iring == 0 ? 'I' : 'O');
      TObjArray* ringArray = new TObjArray();
      ringArray->SetName(Form("FMD_%c",ringChar));
      primaryArray->AddAtAndExpand(ringArray,iring);
      for(Int_t v=0; v<nvtxbins;v++) {
	
	TH2F* hPrimary       = (TH2F*)infile->Get(Form("hPrimary_FMD_%c_vtx%d",ringChar,v));
	ringArray->AddAtAndExpand(hPrimary,v);
      }
    }
    
    
  }
  else {
    hitArray     = input.GetHits();
    primaryArray = input.GetPrimaries();
  }
  fCorrectionArray.SetName("FMD_bg_correction");
  fCorrectionArray.SetOwner();
   
  TList* primaryList     = new TList();
  primaryList->SetName("primaries");
  
  TList* hitList     = new TList();
  hitList->SetName("hits");
  TList* corrList    = new TList();
  corrList->SetName("corrections");
  
  AliFMDAnaCalibBackgroundCorrection* background = new AliFMDAnaCalibBackgroundCorrection();
  
  for(Int_t det= 1; det <=3; det++) {
    Int_t nRings = (det==1 ? 1 : 2);
    
    TObjArray* detArrayCorrection = new TObjArray();
    detArrayCorrection->SetName(Form("FMD%d",det));
    fCorrectionArray.AddAtAndExpand(detArrayCorrection,det);
    
    
    for(Int_t iring = 0; iring<nRings; iring++) {
      TObjArray* primRingArray = (TObjArray*)primaryArray->At(iring);
      Char_t ringChar = (iring == 0 ? 'I' : 'O');
      TObjArray* vtxArrayCorrection = new TObjArray();
      vtxArrayCorrection->SetName(Form("FMD%d%c",det,ringChar));
      detArrayCorrection->AddAtAndExpand(vtxArrayCorrection,iring);
      
      for(Int_t vertexBin=0;vertexBin<nvtxbins;vertexBin++) {
	TObjArray* detArray  = (TObjArray*)hitArray->At(det);
	TObjArray* vtxArray  = (TObjArray*)detArray->At(iring);
	TH2F* hHits          = (TH2F*)vtxArray->At(vertexBin);
	hitList->Add(hHits);
	TH2F* hPrimary  = (TH2F*)primRingArray->At(vertexBin);
	primaryList->Add(hPrimary);
	TH2F* hCorrection = (TH2F*)hHits->Clone(Form("FMD%d%c_vtxbin_%d_correction",det,ringChar,vertexBin));
	hCorrection->Divide(hPrimary);
	corrList->Add(hCorrection);
	hCorrection->SetTitle(hCorrection->GetName());
	vtxArrayCorrection->AddAtAndExpand(hCorrection,vertexBin);
	background->SetBgCorrection(det,ringChar,vertexBin,hCorrection);
      }
      
    }
  }
  
  TAxis refAxis(nvtxbins,-1*zvtxcut,zvtxcut);
  if(inFile) {
    TFile* infile = TFile::Open(infilename);
    TAxis* refaxis = (TAxis*)infile->Get("vertexbins");
    background->SetRefAxis(refaxis);
      
  }
  else background->SetRefAxis(&refAxis);
  
  TFile*  fout = new TFile(filename,"RECREATE");
  refAxis.Write("vertexbins");
  
  hitList->Write();
  primaryList->Write();
  corrList->Write();
   
  TObjArray* container = new TObjArray();
  container->SetOwner();
  container->AddAtAndExpand(&refAxis,0);
  container->AddAtAndExpand(&fCorrectionArray,1);
  container->AddAtAndExpand(hitArray,2);
  container->AddAtAndExpand(primaryArray,3);
  
  
  if(storeInAlien) {
    AliCDBManager* cdb = AliCDBManager::Instance();
    cdb->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
    AliCDBId      id(AliFMDAnaParameters::GetBackgroundPath(),runNo,endRunNo);
    
    AliCDBMetaData* meta = new AliCDBMetaData;				
    meta->SetResponsible(gSystem->GetUserInfo()->fRealName.Data());	
    meta->SetAliRootVersion(gROOT->GetVersion());			
    meta->SetBeamPeriod(1);						
    meta->SetComment("Background Correction for FMD");
    meta->SetProperty("key1", background );
    cdb->Put(background, id, meta);
    
  }
  
  fout->Close();
 
  
  }

//_____________________________________________________________________
void AliFMDBackgroundCorrection::Simulate(Int_t nEvents) {
  
  AliSimulation sim ; 
  sim.SetRunNumber(0);
  TGrid::Connect("alien:",0,0,"t");
  sim.SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
  sim.SetConfigFile("Config.C");
  sim.SetRunQA("FMD:");
  TStopwatch timer;
  timer.Start();
  sim.RunSimulation(nEvents);    
  timer.Stop();
  timer.Print();
  
}

//_____________________________________________________________________
Bool_t 
AliFMDBackgroundCorrection::AliFMDInputBG::ProcessHit(AliFMDHit* h, 
						      TParticle* /*p*/) 
{
  
  if(!h)
    return kTRUE;
  Bool_t retval = ProcessEvent(h->Detector(),
			       h->Ring(),
			       h->Sector(),
			       h->Strip(),
			       h->Track(),
			       h->Q());
  
  // std::cout<<"Length: "<<h->Length()<<std::endl;
  // std::cout<<"Is stopped "<<h->IsStop()<<"    "<<kTRUE<<std::endl;
  return retval;
}
//_____________________________________________________________________
Bool_t 
AliFMDBackgroundCorrection::AliFMDInputBG::ProcessTrackRef(AliTrackReference* tr, TParticle* p) 
{
  if(!tr)
    return kTRUE;
  UShort_t det,sec,strip;
  Char_t   ring;
  AliFMDStripIndex::Unpack(tr->UserId(),det,ring,sec,strip);
  Int_t         nTrack  = tr->GetTrack();
  TDatabasePDG* pdgDB   = TDatabasePDG::Instance();
  TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
  Float_t       charge  = (pdgPart ? pdgPart->Charge() : 0);
  Bool_t        retval  = ProcessEvent(det,ring,sec,strip,nTrack,charge);
  return retval;
  
}
//_____________________________________________________________________
Bool_t 
AliFMDBackgroundCorrection::AliFMDInputBG::ProcessEvent(UShort_t det,
							Char_t   ring, 
							UShort_t sec, 
							UShort_t strip,
							Int_t    nTrack,
							Float_t  charge)
{
  
  
  
  /*  if(charge !=  0 && 
     ((nTrack != fPrevTrack) || 
      (det != fPrevDetector))){ || 
      (ring != fPrevRing))){    ||
				  (sec != fPrevSec))) {*/
  /*Float_t nstrips = (ring =='O' ? 256 : 512);
  
  
  Float_t prevStripTrack = -1;
  if(strip >0)
    prevStripTrack = fLastTrackByStrip.operator()(det,ring,sec,strip-1);
  
  Float_t nextStripTrack = -1;
  if(strip < (nstrips - 1))
    nextStripTrack = fLastTrackByStrip.operator()(det,ring,sec,strip+1);
  */
  
  Float_t thisStripTrack = fLastTrackByStrip.operator()(det,ring,0,0);
  // if(nTrack == fLastTrackByStrip.operator()(det,ring,sec,strip))
  //  std::cout<<"Track # "<<nTrack<<"  failed the cut in "<<det<<"   "<<ring<<"   "<<sec<<"  "<<strip<<std::endl;
  // else
  //  std::cout<<"Track # "<<nTrack<<"  passed the cut in "<<det<<"   "<<ring<<"   "<<sec<<"  "<<strip<<std::endl;
  if(charge != 0 && nTrack != thisStripTrack) {
    
    fHitMap.operator()(det,ring,sec,strip) += 1;
    fHits++;
    Float_t nstrips = (ring =='O' ? 256 : 512);
    fLastTrackByStrip.operator()(det,ring,sec,strip) = (Float_t)nTrack;
    if(strip >0)
      fLastTrackByStrip.operator()(det,ring,sec,strip-1) = (Float_t)nTrack;
    if(strip < (nstrips - 1))
      fLastTrackByStrip.operator()(det,ring,sec,strip+1) = (Float_t)nTrack;
    
    fPrevDetector = det;
    fPrevRing     = ring;
    fPrevSec      = sec;
    fPrevTrack    = nTrack;
  }
  
  
  
  return kTRUE;

}

//_____________________________________________________________________
Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Init() 
{
  fLastTrackByStrip.Reset(-1);
  
  fPrimaryArray.SetOwner();
  fPrimaryArray.SetName("FMD_primary");
  
  fPrimaryMapInner.SetBins(fNbinsEta, -6,6, 20, 0, 2*TMath::Pi());
  fPrimaryMapOuter.SetBins(fNbinsEta, -6,6, 40, 0, 2*TMath::Pi());
  fPrimaryMapInner.SetName("fPrimaryMapInner");
  fPrimaryMapInner.SetName("fPrimaryMapOuter");
  
  fPrimaryMapInner.Sumw2();
  fPrimaryMapOuter.Sumw2();
  for(Int_t iring = 0; iring<2;iring++) {
    Char_t ringChar = (iring == 0 ? 'I' : 'O');
    TObjArray* ringArray = new TObjArray();
    ringArray->SetName(Form("FMD_%c",ringChar));
    fPrimaryArray.AddAtAndExpand(ringArray,iring);
    Int_t nSec = (iring == 1 ? 40 : 20);
    for(Int_t v=0; v<fNvtxBins;v++) {

      TH2F* hPrimary       = new TH2F(Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
				      Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
				      fNbinsEta, -6,6, nSec, 0,2*TMath::Pi());
      hPrimary->Sumw2();
      ringArray->AddAtAndExpand(hPrimary,v);
    }
  }
  
  
  fHitArray.SetOwner();
  fHitArray.SetName("FMD_hits");
   
  for(Int_t det =1; det<=3;det++) {
    TObjArray* detArrayHits = new TObjArray();
    detArrayHits->SetName(Form("FMD%d",det));
    fHitArray.AddAtAndExpand(detArrayHits,det);
    Int_t nRings = (det==1 ? 1 : 2);
    for(Int_t ring = 0;ring<nRings;ring++) {
      Int_t nSec = (ring == 1 ? 40 : 20);
      Char_t ringChar = (ring == 0 ? 'I' : 'O');
      TObjArray* vtxArrayHits = new TObjArray();
      vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
      detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
      for(Int_t v=0; v<fNvtxBins;v++) {
	TH2F* hHits = new TH2F(Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
			       Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
			       fNbinsEta, -6,6, nSec, 0, 2*TMath::Pi());
	hHits->Sumw2();
	vtxArrayHits->AddAtAndExpand(hHits,v);
	
      } 
    }
  }

  AliFMDInput::Init();
  
  return kTRUE;
}
//_____________________________________________________________________

Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Begin(Int_t event ) 
{

  Bool_t             retVal    = AliFMDInput::Begin(event); 
  AliStack*          partStack = fLoader->Stack();
  Int_t              nTracks   = partStack->GetNtrack();
  
  
  for(Int_t j=0;j<nTracks;j++) {
    TParticle* p           = partStack->Particle(j);
    TDatabasePDG* pdgDB    = TDatabasePDG::Instance();
    TParticlePDG* pdgPart  = pdgDB->GetParticle(p->GetPdgCode());
    Float_t       charge   = (pdgPart ? pdgPart->Charge() : 0);
    Float_t       phi      = TMath::ATan2(p->Py(),p->Px());
    
    if(phi<0) phi = phi+2*TMath::Pi();
    // if(p->Theta() == 0) continue;
    Float_t eta   = p->Eta();   
    
    // std::cout<<-1*TMath::Log(TMath::Tan(0.5*p->Theta()))<<std::endl;
    
    Bool_t primary = partStack->IsPhysicalPrimary(j);
    //(charge!=0)&&(TMath::Abs(p->Vx() - vertex.At(0))<0.01)&&(TMath::Abs(p->Vy() - vertex.At(1))<0.01)&&(TMath::Abs(p->Vz() - vertex.At(2))<0.01);
    if(primary && charge !=0) {
      
      fPrim++;
      
      fPrimaryMapInner.Fill(eta,phi);
      fPrimaryMapOuter.Fill(eta,phi);
    }
  }
  
  return retVal;
}
//_____________________________________________________________________
Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::End()  {
  
  Bool_t retval = AliFMDInput::End();
  
  AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
  TArrayF vertex;
  genHeader->PrimaryVertex(vertex);
  
  if(TMath::Abs(vertex.At(2)) > fZvtxCut) 
    return kTRUE;
  
  Double_t delta           = 2*fZvtxCut/fNvtxBins;
  Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
  Int_t    vertexBin       = (Int_t)vertexBinDouble;
  //Primaries
  TObjArray* innerArray = (TObjArray*)fPrimaryArray.At(0);
  TObjArray* outerArray = (TObjArray*)fPrimaryArray.At(1);
  
  TH2F* hPrimaryInner  = (TH2F*)innerArray->At(vertexBin);
  TH2F* hPrimaryOuter  = (TH2F*)outerArray->At(vertexBin);
  
  hPrimaryInner->Add(&fPrimaryMapInner);
  hPrimaryOuter->Add(&fPrimaryMapOuter);
  
  //Hits
  for(UShort_t det=1;det<=3;det++) {
    Int_t nRings = (det==1 ? 1 : 2);
    for (UShort_t ir = 0; ir < nRings; ir++) {
      Char_t   ring = (ir == 0 ? 'I' : 'O');
      UShort_t nsec = (ir == 0 ? 20  : 40);
      UShort_t nstr = (ir == 0 ? 512 : 256);
      
      for(UShort_t sec =0; sec < nsec;  sec++) {
	
	for(UShort_t strip = 0; strip < nstr; strip++) {
	  
	  if(fHitMap.operator()(det,ring,sec,strip) > 0) {
	    //std::cout<<fHitMap.operator()(det,ring,sec,strip)<<std::endl;
	    Double_t x,y,z;
	    AliFMDGeometry* fmdgeo = AliFMDGeometry::Instance();
	    fmdgeo->Detector2XYZ(det,ring,sec,strip,x,y,z);
	    
	    Int_t iring = (ring == 'I' ? 0 : 1);
	    
	    TObjArray* detArray  = (TObjArray*)fHitArray.At(det);
	    TObjArray* vtxArray  = (TObjArray*)detArray->At(iring);
	    TH2F* hHits          = (TH2F*)vtxArray->At(vertexBin);
	    
	    Float_t   phi   = TMath::ATan2(y,x);
	    if(phi<0) phi   = phi+2*TMath::Pi();
	    Float_t   r     = TMath::Sqrt(TMath::Power(x,2)+TMath::Power(y,2));
	    Float_t   theta = TMath::ATan2(r,z-vertex.At(2));
	    Float_t   eta   = -1*TMath::Log(TMath::Tan(0.5*theta));
	    hHits->Fill(eta,phi,fHitMap.operator()(det,ring,sec,strip));
	  }
	  
	}
      }
    }
  }
  
  fPrimaryMapInner.Reset();
  fPrimaryMapOuter.Reset();
  fHitMap.Reset(0);
  fLastTrackByStrip.Reset(-1);
  
  return retval;
}

//
// EOF
//
Commit	Line	Data
df0d5480	1	/**************************************************************************
	2	* Copyright(c) 2004, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	// Thil class computes background corrections for the FMD. The correction is computed
	17	// in eta,phi cells and the objects stored can be put into alien to use with analysis.
	18	// It is based on the AliFMDInput class that is used to loop over hits and primaries.
	19	//
	20	// Author: Hans Hjersing Dalsgaard, NBI, hans.dalsgaard@cern.ch
	21	//
	22	//
	23
	24	#include "AliSimulation.h"
	25	#include "TStopwatch.h"
	26	#include "iostream"
	27	#include "TGrid.h"
	28	#include "AliRunLoader.h"
	29	#include "AliGeomManager.h"
	30	#include "AliFMDGeometry.h"
	31	#include "AliStack.h"
	32	#include "TParticle.h"
	33	#include "TDatabasePDG.h"
	34	#include "TParticlePDG.h"
	35	#include "AliRun.h"
	36	#include "AliFMDBackgroundCorrection.h"
	37	#include "TSystem.h"
	38	#include "AliCDBManager.h"
	39	#include "TTree.h"
	40	#include "TClonesArray.h"
	41	#include "TBranch.h"
	42	#include "AliFMDHit.h"
	43	#include "AliLoader.h"
	44	#include "AliFMD.h"
df0d5480	45	#include "AliGenEventHeader.h"
	46	#include "AliHeader.h"
	47	#include "TFile.h"
	48	#include "TAxis.h"
	49	#include "AliCDBId.h"
	50	#include "AliCDBMetaData.h"
	51	#include "TROOT.h"
	52	#include "AliFMDParameters.h"
	53	#include "AliLog.h"
26c8b5ff	54	#include "TList.h"
8dc823cc	55	#include "AliFMDAnaParameters.h"
b82e76e0	56	#include "AliFMDAnaCalibBackgroundCorrection.h"
08d168d9	57	#include "AliTrackReference.h"
08d168d9	58	#include "AliFMDStripIndex.h"
df0d5480	59
	60	ClassImp(AliFMDBackgroundCorrection)
	61	//_____________________________________________________________________
	62	AliFMDBackgroundCorrection::AliFMDBackgroundCorrection() :
	63	TNamed(),
ca3af5d9	64	fCorrectionArray(),
ca3af5d9	65	fPrimaryList()
df0d5480	66	{}
	67
	68	//_____________________________________________________________________
08d168d9	69	AliFMDBackgroundCorrection::AliFMDInputBG::AliFMDInputBG(Bool_t hits_not_trackref) :
5d5bc6be	70	AliFMDInput("galice.root"),
8dc823cc	71	fPrimaryArray(),
8dc823cc	72	fHitArray(),
627ba74b	73	fHitMap(),
6289b3e8	74	fLastTrackByStrip(),
df0d5480	75	fPrim(0),
	76	fHits(0),
	77	fZvtxCut(0),
	78	fNvtxBins(0),
	79	fPrevTrack(-1),
	80	fPrevDetector(-1),
	81	fPrevRing('Q'),
5d5bc6be	82	fPrevSec(-1),
df0d5480	83	fNbinsEta(100)
df0d5480	84	{
6289b3e8	85
6289b3e8	86	if(hits_not_trackref) {
08d168d9	87	AddLoad(kHits);
6289b3e8	88	AddLoad(kTracks);
6289b3e8	89	}
08d168d9	90	else
08d168d9	91	AddLoad(kTrackRefs);
df0d5480	92	AddLoad(kKinematics);
df0d5480	93	AddLoad(kHeader);
627ba74b	94
627ba74b	95
df0d5480	96	}
	97
	98	//_____________________________________________________________________
	99
08d168d9	100	void AliFMDBackgroundCorrection::GenerateBackgroundCorrection(Bool_t from_hits,
08d168d9	101	const Int_t nvtxbins,
df0d5480	102	Float_t zvtxcut,
ca3af5d9	103	const Int_t nBinsEta,
df0d5480	104	Bool_t storeInAlien,
	105	Int_t runNo,
	106	Int_t endRunNo,
	107	const Char_t* filename,
	108	Bool_t simulate,
109e97cd	109	Int_t nEvents,
	110	Bool_t inFile,
	111	const Char_t* infilename) {
df0d5480	112
ca3af5d9	113	//TGrid::Connect("alien:",0,0,"t");
df0d5480	114	if(simulate)
	115	Simulate(nEvents);
	116	else {
ca3af5d9	117	//AliCDBManager::Instance()->SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
162637e4	118	AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
df0d5480	119	AliCDBManager::Instance()->SetRun(runNo);
	120
	121	#if defined(__CINT__)
	122	gSystem->Load("liblhapdf");
	123	gSystem->Load("libEGPythia6");
	124	gSystem->Load("libpythia6");
	125	gSystem->Load("libAliPythia6");
	126	gSystem->Load("libgeant321");
	127	#endif
ca3af5d9	128	//
df0d5480	129	}
	130
	131	//Setting up the geometry
	132	//-----------------------------------------------
	133	if (AliGeomManager::GetGeometry() == NULL)
	134	AliGeomManager::LoadGeometry();
	135
	136	AliFMDGeometry* geo = AliFMDGeometry::Instance();
	137	geo->Init();
	138	geo->InitTransformations();
ca3af5d9	139
df0d5480	140	AliInfo("Processing hits and primaries ");
df0d5480	141
08d168d9	142	AliFMDInputBG input(from_hits);
df0d5480	143
109e97cd	144	if(!inFile) {
	145
	146	input.SetVtxCutZ(zvtxcut);
	147	input.SetNvtxBins(nvtxbins);
	148	input.SetNbinsEta(nBinsEta);
	149	input.Run();
	150	}
df0d5480	151
109e97cd	152	AliInfo(Form("Found %d primaries and %d hits.", input.GetNprim(),input.GetNhits()));
	153	TObjArray* hitArray ;
	154	TObjArray* primaryArray;
	155	if(inFile) {
	156	TFile* infile = TFile::Open(infilename);
	157	hitArray = new TObjArray();
	158	primaryArray = new TObjArray();
	159
	160	for(Int_t det =1; det<=3;det++)
	161	{
	162	TObjArray* detArrayHits = new TObjArray();
	163	detArrayHits->SetName(Form("FMD%d",det));
	164	hitArray->AddAtAndExpand(detArrayHits,det);
	165	Int_t nRings = (det==1 ? 1 : 2);
	166	for(Int_t ring = 0;ring<nRings;ring++)
	167	{
	168
	169	Char_t ringChar = (ring == 0 ? 'I' : 'O');
	170	TObjArray* vtxArrayHits = new TObjArray();
	171	vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	172	detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	173	for(Int_t v=0; v<nvtxbins;v++)
	174	{
	175
	176	TH2F* hHits = (TH2F*)infile->Get(Form("hHits_FMD%d%c_vtx%d",det,ringChar,v));
	177
	178
	179	vtxArrayHits->AddAtAndExpand(hHits,v);
	180
	181	}
	182	}
	183
	184	}
	185
	186	for(Int_t iring = 0; iring<2;iring++) {
	187	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	188	TObjArray* ringArray = new TObjArray();
	189	ringArray->SetName(Form("FMD_%c",ringChar));
	190	primaryArray->AddAtAndExpand(ringArray,iring);
	191	for(Int_t v=0; v<nvtxbins;v++) {
	192
	193	TH2F* hPrimary = (TH2F*)infile->Get(Form("hPrimary_FMD_%c_vtx%d",ringChar,v));
	194	ringArray->AddAtAndExpand(hPrimary,v);
	195	}
	196	}
	197
	198
	199	}
	200	else {
	201	hitArray = input.GetHits();
	202	primaryArray = input.GetPrimaries();
	203	}
df0d5480	204	fCorrectionArray.SetName("FMD_bg_correction");
df0d5480	205	fCorrectionArray.SetOwner();
ca3af5d9	206
ca3af5d9	207	TList* primaryList = new TList();
26c8b5ff	208	primaryList->SetName("primaries");
ca3af5d9	209
26c8b5ff	210	TList* hitList = new TList();
	211	hitList->SetName("hits");
	212	TList* corrList = new TList();
	213	corrList->SetName("corrections");
109e97cd	214
b82e76e0	215	AliFMDAnaCalibBackgroundCorrection* background = new AliFMDAnaCalibBackgroundCorrection();
b82e76e0	216
df0d5480	217	for(Int_t det= 1; det <=3; det++) {
	218	Int_t nRings = (det==1 ? 1 : 2);
	219
	220	TObjArray* detArrayCorrection = new TObjArray();
	221	detArrayCorrection->SetName(Form("FMD%d",det));
	222	fCorrectionArray.AddAtAndExpand(detArrayCorrection,det);
	223
	224
	225	for(Int_t iring = 0; iring<nRings; iring++) {
	226	TObjArray* primRingArray = (TObjArray*)primaryArray->At(iring);
	227	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	228	TObjArray* vtxArrayCorrection = new TObjArray();
	229	vtxArrayCorrection->SetName(Form("FMD%d%c",det,ringChar));
	230	detArrayCorrection->AddAtAndExpand(vtxArrayCorrection,iring);
	231
	232	for(Int_t vertexBin=0;vertexBin<nvtxbins;vertexBin++) {
	233	TObjArray* detArray = (TObjArray*)hitArray->At(det);
	234	TObjArray* vtxArray = (TObjArray*)detArray->At(iring);
	235	TH2F* hHits = (TH2F*)vtxArray->At(vertexBin);
26c8b5ff	236	hitList->Add(hHits);
df0d5480	237	TH2F* hPrimary = (TH2F*)primRingArray->At(vertexBin);
26c8b5ff	238	primaryList->Add(hPrimary);
df0d5480	239	TH2F* hCorrection = (TH2F*)hHits->Clone(Form("FMD%d%c_vtxbin_%d_correction",det,ringChar,vertexBin));
ca3af5d9	240	hCorrection->Divide(hPrimary);
26c8b5ff	241	corrList->Add(hCorrection);
8dc823cc	242	hCorrection->SetTitle(hCorrection->GetName());
df0d5480	243	vtxArrayCorrection->AddAtAndExpand(hCorrection,vertexBin);
b82e76e0	244	background->SetBgCorrection(det,ringChar,vertexBin,hCorrection);
df0d5480	245	}
	246
	247	}
	248	}
	249
	250	TAxis refAxis(nvtxbins,-1*zvtxcut,zvtxcut);
109e97cd	251	if(inFile) {
	252	TFile* infile = TFile::Open(infilename);
	253	TAxis* refaxis = (TAxis*)infile->Get("vertexbins");
	254	background->SetRefAxis(refaxis);
	255
	256	}
	257	else background->SetRefAxis(&refAxis);
df0d5480	258
8dc823cc	259	TFile* fout = new TFile(filename,"RECREATE");
df0d5480	260	refAxis.Write("vertexbins");
26c8b5ff	261
	262	hitList->Write();
	263	primaryList->Write();
	264	corrList->Write();
ca3af5d9	265
8dc823cc	266	TObjArray* container = new TObjArray();
	267	container->SetOwner();
	268	container->AddAtAndExpand(&refAxis,0);
	269	container->AddAtAndExpand(&fCorrectionArray,1);
	270	container->AddAtAndExpand(hitArray,2);
	271	container->AddAtAndExpand(primaryArray,3);
b82e76e0	272
b82e76e0	273
df0d5480	274	if(storeInAlien) {
df0d5480	275	AliCDBManager* cdb = AliCDBManager::Instance();
162637e4	276	cdb->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
8dc823cc	277	AliCDBId id(AliFMDAnaParameters::GetBackgroundPath(),runNo,endRunNo);
df0d5480	278
	279	AliCDBMetaData* meta = new AliCDBMetaData;
	280	meta->SetResponsible(gSystem->GetUserInfo()->fRealName.Data());
	281	meta->SetAliRootVersion(gROOT->GetVersion());
	282	meta->SetBeamPeriod(1);
	283	meta->SetComment("Background Correction for FMD");
b82e76e0	284	meta->SetProperty("key1", background );
b82e76e0	285	cdb->Put(background, id, meta);
df0d5480	286
	287	}
	288
8dc823cc	289	fout->Close();
8dc823cc	290
df0d5480	291
ca3af5d9	292	}
ca3af5d9	293
df0d5480	294	//_____________________________________________________________________
	295	void AliFMDBackgroundCorrection::Simulate(Int_t nEvents) {
	296
	297	AliSimulation sim ;
	298	sim.SetRunNumber(0);
	299	TGrid::Connect("alien:",0,0,"t");
	300	sim.SetDefaultStorage("alien://Folder=/alice/data/2008/LHC08d/OCDB/");
	301	sim.SetConfigFile("Config.C");
	302	sim.SetRunQA("FMD:");
	303	TStopwatch timer;
	304	timer.Start();
	305	sim.RunSimulation(nEvents);
	306	timer.Stop();
	307	timer.Print();
	308
	309	}
	310
	311	//_____________________________________________________________________
faf80567	312	Bool_t
	313	AliFMDBackgroundCorrection::AliFMDInputBG::ProcessHit(AliFMDHit* h,
	314	TParticle* /p/)
	315	{
df0d5480	316
08d168d9	317	if(!h)
08d168d9	318	return kTRUE;
faf80567	319	Bool_t retval = ProcessEvent(h->Detector(),
faf80567	320	h->Ring(),
98accb9e	321	h->Sector(),
98accb9e	322	h->Strip(),
faf80567	323	h->Track(),
faf80567	324	h->Q());
08d168d9	325
6289b3e8	326	// std::cout<<"Length: "<<h->Length()<<std::endl;
6289b3e8	327	// std::cout<<"Is stopped "<<h->IsStop()<<" "<<kTRUE<<std::endl;
08d168d9	328	return retval;
	329	}
	330	//_____________________________________________________________________
faf80567	331	Bool_t
6289b3e8	332	AliFMDBackgroundCorrection::AliFMDInputBG::ProcessTrackRef(AliTrackReference* tr, TParticle* p)
faf80567	333	{
08d168d9	334	if(!tr)
	335	return kTRUE;
	336	UShort_t det,sec,strip;
	337	Char_t ring;
	338	AliFMDStripIndex::Unpack(tr->UserId(),det,ring,sec,strip);
faf80567	339	Int_t nTrack = tr->GetTrack();
faf80567	340	TDatabasePDG* pdgDB = TDatabasePDG::Instance();
08d168d9	341	TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
faf80567	342	Float_t charge = (pdgPart ? pdgPart->Charge() : 0);
faf80567	343	Bool_t retval = ProcessEvent(det,ring,sec,strip,nTrack,charge);
08d168d9	344	return retval;
	345
	346	}
	347	//_____________________________________________________________________
faf80567	348	Bool_t
	349	AliFMDBackgroundCorrection::AliFMDInputBG::ProcessEvent(UShort_t det,
	350	Char_t ring,
	351	UShort_t sec,
	352	UShort_t strip,
	353	Int_t nTrack,
	354	Float_t charge)
08d168d9	355	{
08d168d9	356
df0d5480	357
df0d5480	358
6289b3e8	359	/* if(charge != 0 &&
627ba74b	360	((nTrack != fPrevTrack) \|\|
6289b3e8	361	(det != fPrevDetector))){ \|\|
	362	(ring != fPrevRing))){ \|\|
	363	(sec != fPrevSec))) {*/
	364	/*Float_t nstrips = (ring =='O' ? 256 : 512);
	365
	366
	367	Float_t prevStripTrack = -1;
	368	if(strip >0)
	369	prevStripTrack = fLastTrackByStrip.operator()(det,ring,sec,strip-1);
	370
	371	Float_t nextStripTrack = -1;
	372	if(strip < (nstrips - 1))
	373	nextStripTrack = fLastTrackByStrip.operator()(det,ring,sec,strip+1);
	374	*/
	375
	376	Float_t thisStripTrack = fLastTrackByStrip.operator()(det,ring,0,0);
	377	// if(nTrack == fLastTrackByStrip.operator()(det,ring,sec,strip))
	378	// std::cout<<"Track # "<<nTrack<<" failed the cut in "<<det<<" "<<ring<<" "<<sec<<" "<<strip<<std::endl;
	379	// else
	380	// std::cout<<"Track # "<<nTrack<<" passed the cut in "<<det<<" "<<ring<<" "<<sec<<" "<<strip<<std::endl;
	381	if(charge != 0 && nTrack != thisStripTrack) {
	382
	383	fHitMap.operator()(det,ring,sec,strip) += 1;
08d168d9	384	fHits++;
6289b3e8	385	Float_t nstrips = (ring =='O' ? 256 : 512);
	386	fLastTrackByStrip.operator()(det,ring,sec,strip) = (Float_t)nTrack;
	387	if(strip >0)
	388	fLastTrackByStrip.operator()(det,ring,sec,strip-1) = (Float_t)nTrack;
	389	if(strip < (nstrips - 1))
	390	fLastTrackByStrip.operator()(det,ring,sec,strip+1) = (Float_t)nTrack;
5d5bc6be	391
6289b3e8	392	fPrevDetector = det;
	393	fPrevRing = ring;
	394	fPrevSec = sec;
	395	fPrevTrack = nTrack;
08d168d9	396	}
ca3af5d9	397
6289b3e8	398
5d5bc6be	399
df0d5480	400	return kTRUE;
08d168d9	401
df0d5480	402	}
	403
	404	//_____________________________________________________________________
faf80567	405	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Init()
faf80567	406	{
6289b3e8	407	fLastTrackByStrip.Reset(-1);
6289b3e8	408
df0d5480	409	fPrimaryArray.SetOwner();
	410	fPrimaryArray.SetName("FMD_primary");
	411
627ba74b	412	fPrimaryMapInner.SetBins(fNbinsEta, -6,6, 20, 0, 2*TMath::Pi());
	413	fPrimaryMapOuter.SetBins(fNbinsEta, -6,6, 40, 0, 2*TMath::Pi());
	414	fPrimaryMapInner.SetName("fPrimaryMapInner");
	415	fPrimaryMapInner.SetName("fPrimaryMapOuter");
	416
	417	fPrimaryMapInner.Sumw2();
	418	fPrimaryMapOuter.Sumw2();
df0d5480	419	for(Int_t iring = 0; iring<2;iring++) {
	420	Char_t ringChar = (iring == 0 ? 'I' : 'O');
	421	TObjArray* ringArray = new TObjArray();
	422	ringArray->SetName(Form("FMD_%c",ringChar));
	423	fPrimaryArray.AddAtAndExpand(ringArray,iring);
	424	Int_t nSec = (iring == 1 ? 40 : 20);
	425	for(Int_t v=0; v<fNvtxBins;v++) {
	426
	427	TH2F* hPrimary = new TH2F(Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
	428	Form("hPrimary_FMD_%c_vtx%d",ringChar,v),
	429	fNbinsEta, -6,6, nSec, 0,2*TMath::Pi());
b82e76e0	430	hPrimary->Sumw2();
df0d5480	431	ringArray->AddAtAndExpand(hPrimary,v);
	432	}
	433	}
	434
	435
	436	fHitArray.SetOwner();
	437	fHitArray.SetName("FMD_hits");
	438
faf80567	439	for(Int_t det =1; det<=3;det++) {
	440	TObjArray* detArrayHits = new TObjArray();
	441	detArrayHits->SetName(Form("FMD%d",det));
	442	fHitArray.AddAtAndExpand(detArrayHits,det);
	443	Int_t nRings = (det==1 ? 1 : 2);
	444	for(Int_t ring = 0;ring<nRings;ring++) {
	445	Int_t nSec = (ring == 1 ? 40 : 20);
	446	Char_t ringChar = (ring == 0 ? 'I' : 'O');
	447	TObjArray* vtxArrayHits = new TObjArray();
	448	vtxArrayHits->SetName(Form("FMD%d%c",det,ringChar));
	449	detArrayHits->AddAtAndExpand(vtxArrayHits,ring);
	450	for(Int_t v=0; v<fNvtxBins;v++) {
	451	TH2F* hHits = new TH2F(Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
	452	Form("hHits_FMD%d%c_vtx%d", det,ringChar,v),
	453	fNbinsEta, -6,6, nSec, 0, 2*TMath::Pi());
	454	hHits->Sumw2();
	455	vtxArrayHits->AddAtAndExpand(hHits,v);
	456
	457	}
df0d5480	458	}
faf80567	459	}
df0d5480	460
df0d5480	461	AliFMDInput::Init();
df0d5480	462
df0d5480	463	return kTRUE;
df0d5480	464	}
ca3af5d9	465	//_____________________________________________________________________
ca3af5d9	466
faf80567	467	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::Begin(Int_t event )
faf80567	468	{
df0d5480	469
faf80567	470	Bool_t retVal = AliFMDInput::Begin(event);
	471	AliStack* partStack = fLoader->Stack();
	472	Int_t nTracks = partStack->GetNtrack();
ca3af5d9	473
faf80567	474
faf80567	475	for(Int_t j=0;j<nTracks;j++) {
5d5bc6be	476	TParticle* p = partStack->Particle(j);
	477	TDatabasePDG* pdgDB = TDatabasePDG::Instance();
	478	TParticlePDG* pdgPart = pdgDB->GetParticle(p->GetPdgCode());
	479	Float_t charge = (pdgPart ? pdgPart->Charge() : 0);
	480	Float_t phi = TMath::ATan2(p->Py(),p->Px());
faf80567	481
faf80567	482	if(phi<0) phi = phi+2*TMath::Pi();
627ba74b	483	// if(p->Theta() == 0) continue;
	484	Float_t eta = p->Eta();
	485
	486	// std::cout<<-1TMath::Log(TMath::Tan(0.5p->Theta()))<<std::endl;
faf80567	487
	488	Bool_t primary = partStack->IsPhysicalPrimary(j);
	489	//(charge!=0)&&(TMath::Abs(p->Vx() - vertex.At(0))<0.01)&&(TMath::Abs(p->Vy() - vertex.At(1))<0.01)&&(TMath::Abs(p->Vz() - vertex.At(2))<0.01);
	490	if(primary && charge !=0) {
	491
	492	fPrim++;
faf80567	493
627ba74b	494	fPrimaryMapInner.Fill(eta,phi);
627ba74b	495	fPrimaryMapOuter.Fill(eta,phi);
faf80567	496	}
faf80567	497	}
109e97cd	498
ca3af5d9	499	return retVal;
	500	}
	501	//_____________________________________________________________________
627ba74b	502	Bool_t AliFMDBackgroundCorrection::AliFMDInputBG::End() {
	503
	504	Bool_t retval = AliFMDInput::End();
	505
	506	AliGenEventHeader* genHeader = fLoader->GetHeader()->GenEventHeader();
	507	TArrayF vertex;
	508	genHeader->PrimaryVertex(vertex);
	509
	510	if(TMath::Abs(vertex.At(2)) > fZvtxCut)
	511	return kTRUE;
	512
	513	Double_t delta = 2*fZvtxCut/fNvtxBins;
	514	Double_t vertexBinDouble = (vertex.At(2) + fZvtxCut) / delta;
	515	Int_t vertexBin = (Int_t)vertexBinDouble;
	516	//Primaries
	517	TObjArray* innerArray = (TObjArray*)fPrimaryArray.At(0);
	518	TObjArray* outerArray = (TObjArray*)fPrimaryArray.At(1);
	519
	520	TH2F* hPrimaryInner = (TH2F*)innerArray->At(vertexBin);
	521	TH2F* hPrimaryOuter = (TH2F*)outerArray->At(vertexBin);
	522
	523	hPrimaryInner->Add(&fPrimaryMapInner);
	524	hPrimaryOuter->Add(&fPrimaryMapOuter);
	525
	526	//Hits
	527	for(UShort_t det=1;det<=3;det++) {
	528	Int_t nRings = (det==1 ? 1 : 2);
	529	for (UShort_t ir = 0; ir < nRings; ir++) {
	530	Char_t ring = (ir == 0 ? 'I' : 'O');
	531	UShort_t nsec = (ir == 0 ? 20 : 40);
	532	UShort_t nstr = (ir == 0 ? 512 : 256);
	533
	534	for(UShort_t sec =0; sec < nsec; sec++) {
	535
	536	for(UShort_t strip = 0; strip < nstr; strip++) {
	537
	538	if(fHitMap.operator()(det,ring,sec,strip) > 0) {
6289b3e8	539	//std::cout<<fHitMap.operator()(det,ring,sec,strip)<<std::endl;
627ba74b	540	Double_t x,y,z;
	541	AliFMDGeometry* fmdgeo = AliFMDGeometry::Instance();
	542	fmdgeo->Detector2XYZ(det,ring,sec,strip,x,y,z);
	543
	544	Int_t iring = (ring == 'I' ? 0 : 1);
	545
	546	TObjArray* detArray = (TObjArray*)fHitArray.At(det);
	547	TObjArray* vtxArray = (TObjArray*)detArray->At(iring);
	548	TH2F* hHits = (TH2F*)vtxArray->At(vertexBin);
	549
	550	Float_t phi = TMath::ATan2(y,x);
	551	if(phi<0) phi = phi+2*TMath::Pi();
	552	Float_t r = TMath::Sqrt(TMath::Power(x,2)+TMath::Power(y,2));
	553	Float_t theta = TMath::ATan2(r,z-vertex.At(2));
	554	Float_t eta = -1TMath::Log(TMath::Tan(0.5theta));
6289b3e8	555	hHits->Fill(eta,phi,fHitMap.operator()(det,ring,sec,strip));
627ba74b	556	}
	557
	558	}
	559	}
	560	}
	561	}
	562
	563	fPrimaryMapInner.Reset();
	564	fPrimaryMapOuter.Reset();
	565	fHitMap.Reset(0);
6289b3e8	566	fLastTrackByStrip.Reset(-1);
627ba74b	567
	568	return retval;
	569	}
	570
ca3af5d9	571	//
	572	// EOF
	573	//
df0d5480	574
df0d5480	575