[u/mrichter/AliRoot.git] / STEER / AliMCEventHandler.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, 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.                  *
 **************************************************************************/

/* $Id$ */
//---------------------------------------------------------------------------------
//                          Class AliMCEventHandler
// This class gives access to MC truth during the analysis.
// Monte Carlo truth is containe in the kinematics tree (produced particles) and 
// the tree of reference hits.
//      
// Origin: Andreas Morsch, CERN, andreas.morsch@cern.ch 
//---------------------------------------------------------------------------------


#include "AliMCEventHandler.h"
#include "AliTrackReference.h"
#include "AliHeader.h"
#include "AliStack.h"
#include "AliLog.h"

#include <TTree.h>
#include <TFile.h>
#include <TParticle.h>
#include <TClonesArray.h>
#include <TDirectoryFile.h>
#include <TArrow.h>
#include <TMarker.h>
#include <TH2F.h>


ClassImp(AliMCEventHandler)

AliMCEventHandler::AliMCEventHandler() :
    AliVEventHandler(),
    fFileE(0),
    fFileK(0),
    fFileTR(0),
    fTmpFileTR(0),
    fTreeE(0),
    fTreeK(0),
    fTreeTR(0),
    fTmpTreeTR(0),
    fStack(0),
    fHeader(0),
    fTrackReferences(0),
    fNEvent(-1),
    fEvent(-1),
    fNprimaries(-1),
    fNparticles(-1),
    fPathName("./"),
    fExtension(""),
    fFileNumber(0),
    fEventsPerFile(0)
{
    // Default constructor
}

AliMCEventHandler::AliMCEventHandler(const char* name, const char* title) :
    AliVEventHandler(name, title),
    fFileE(0),
    fFileK(0),
    fFileTR(0),
    fTmpFileTR(0),
    fTreeE(0),
    fTreeK(0),
    fTreeTR(0),
    fTmpTreeTR(0),
    fStack(0),
    fHeader(new AliHeader()),
    fTrackReferences(new TClonesArray("AliTrackReference", 200)),
    fNEvent(-1),
    fEvent(-1),
    fNprimaries(-1),
    fNparticles(-1),
    fPathName("./"),
    fExtension(""),
    fFileNumber(0),
    fEventsPerFile(0)
{
    // Constructor
}
AliMCEventHandler::~AliMCEventHandler()
{ 
    // Destructor
    delete fFileE;
    delete fFileK;
    delete fFileTR;
}

Bool_t AliMCEventHandler::InitIO(Option_t* /*opt*/) 
{ 
    // Initialize input
    //
    fFileE = TFile::Open(Form("%sgalice.root", fPathName));
    if (!fFileE) AliFatal(Form("AliMCEventHandler:galice.root not found in directory %s ! \n", fPathName));

    fFileE->GetObject("TE", fTreeE);
    fTreeE->SetBranchAddress("Header", &fHeader);
    fNEvent = fTreeE->GetEntries();
    //
    // Tree K
    fFileK = TFile::Open(Form("%sKinematics%s.root", fPathName, fExtension));
    if (!fFileK) AliFatal(Form("AliMCEventHandler:Kinematics.root not found in directory %s ! \n", fPathName));
    fEventsPerFile = fFileK->GetNkeys() - fFileK->GetNProcessIDs();
    //
    // Tree TR
    fFileTR = TFile::Open(Form("%sTrackRefs%s.root", fPathName, fExtension));
    if (!fFileTR) AliWarning(Form("AliMCEventHandler:TrackRefs.root not found in directory %s ! \n", fPathName));
    //
    // Reset the event number
    fEvent      = -1;
    fFileNumber =  0;
    
    AliInfo(Form("AliMCEventHandler:Number of events in this directory %5d \n", fNEvent));
    return kTRUE;
    
}

Bool_t AliMCEventHandler::GetEvent(Int_t iev)
{
    // Load the event number iev
    //
    // Calculate the file number
    Int_t inew  = iev/fEventsPerFile;
    if (inew != fFileNumber) {
	fFileNumber = inew;
	if (!OpenFile(fFileNumber)){
	    return kFALSE;
	}
    }
    // Folder name
    char folder[20];
    sprintf(folder, "Event%d", iev);

    // TreeE
    fTreeE->GetEntry(iev);
    fStack = fHeader->Stack();
    // Tree K
    TDirectoryFile* dirK  = 0;
    fFileK->GetObject(folder, dirK);
    if (!dirK) {
	AliWarning(Form("AliMCEventHandler: Event #%5d not found\n", iev));
	return kFALSE;
    }
    dirK->GetObject("TreeK", fTreeK);
    fStack->ConnectTree(fTreeK);
    fStack->GetEvent();
    
    //Tree TR 

    if (fFileTR) {
	TDirectoryFile* dirTR = 0;
	fFileTR->GetObject(folder, dirTR);
	dirTR->GetObject("TreeTR", fTreeTR);
	if (fTreeTR->GetBranch("AliRun")) {
	    // This is an old format with one branch per detector not in synch with TreeK
	    ReorderAndExpandTreeTR();
	    delete dirTR;
	} else {
	    // New format 
	    fTreeTR->SetBranchAddress("TrackReferences", &fTrackReferences);
	}
    }

    //
    fNparticles = fStack->GetNtrack();
    fNprimaries = fStack->GetNprimary();
    AliInfo(Form("AliMCEventHandler: Event#: %5d Number of particles: %5d (all) %5d (primaries)\n", 
		 fEvent, fNparticles, fNprimaries));
    
    return kTRUE;
}

Bool_t AliMCEventHandler::OpenFile(Int_t i)
{
    // Open file i
    Bool_t ok = kTRUE;
    if (i > 0) {
	fExtension = Form("%d", i);
    } else {
	fExtension = "";
    }
    
    
    delete fFileK;
    fFileK = TFile::Open(Form("%sKinematics%s.root", fPathName, fExtension));
    if (!fFileK) {
	AliFatal(Form("AliMCEventHandler:Kinematics%s.root not found in directory %s ! \n", fExtension, fPathName));
	ok = kFALSE;
    }
    
    delete fFileTR;
    fFileTR = TFile::Open(Form("%sTrackRefs%s.root", fPathName, fExtension));
    if (!fFileTR) {
	AliWarning(Form("AliMCEventHandler:TrackRefs%s.root not found in directory %s ! \n", fExtension, fPathName));
	ok = kFALSE;
    }
    
    return ok;
}

Bool_t AliMCEventHandler::BeginEvent()
{ 
    // Read the next event
    fEvent++;
    if (fEvent >= fNEvent) {
	AliWarning(Form("AliMCEventHandler: Event number out of range %5d\n", fEvent));
	return kFALSE;
    }
    return GetEvent(fEvent);
}

Int_t AliMCEventHandler::GetParticleAndTR(Int_t i, TParticle*& particle, TClonesArray*& trefs)
{
    // Retrieve entry i
    if (i < 0 || i >= fNparticles) {
	AliWarning(Form("AliMCEventHandler::GetEntry: Index out of range"));
	particle = 0;
	trefs    = 0;
	return (-1);
    }
    particle = fStack->Particle(i);
    if (fFileTR) {
	fTreeTR->GetEntry(fStack->TreeKEntry(i));
	trefs    = fTrackReferences;
	return trefs->GetEntries();
    } else {
	trefs = 0;
	return -1;
    }
}

void AliMCEventHandler::DrawCheck(Int_t i, Int_t search)
{
    // Retrieve entry i and draw momentum vector and hits
    if (!fFileTR) {
	AliWarning("No Track Reference information available");
	return;
    } 

    if (i > -1 && i < fNparticles) {
	fTreeTR->GetEntry(fStack->TreeKEntry(i));
    } else {
	AliWarning("AliMCEventHandler::GetEntry: Index out of range");
    }
    
    Int_t nh = fTrackReferences->GetEntries();
    
    
    if (search) {
	while(nh <= search && i < fNparticles - 1) {
	    i++;
	    fTreeTR->GetEntry(fStack->TreeKEntry(i));
	    nh =  fTrackReferences->GetEntries();
	}
	printf("Found Hits at %5d\n", i);
    }
    TParticle* particle = fStack->Particle(i);

    TH2F*    h = new TH2F("", "", 100, -500, 500, 100, -500, 500);
    Float_t x0 = particle->Vx();
    Float_t y0 = particle->Vy();

    Float_t x1 = particle->Vx() + particle->Px() * 50.;
    Float_t y1 = particle->Vy() + particle->Py() * 50.;
    
    TArrow*  a = new TArrow(x0, y0, x1, y1, 0.01);
    h->Draw();
    a->SetLineColor(2);
    
    a->Draw();
    
    for (Int_t ih = 0; ih < nh; ih++) {
	AliTrackReference* ref = (AliTrackReference*) fTrackReferences->At(ih);
	TMarker* m = new TMarker(ref->X(), ref->Y(), 20);
	m->Draw();
	m->SetMarkerSize(0.4);
	
    }
}

Bool_t AliMCEventHandler::Notify(const char *path)
{
    // Notify about directory change
    // The directory is taken from the 'path' argument
    // Reconnect trees

    printf("AliMCEventHandler::Notify() file: %s\n", path);
    fPathName = Form("%s",  path);
    ResetIO();
    InitIO("");
    return kTRUE;
}
    
void AliMCEventHandler::ResetIO()
{
    // Reset files
    if (fFileE)  delete fFileE;
    if (fFileK)  delete fFileK;
    if (fFileTR) delete fFileTR;
}

			    
Bool_t AliMCEventHandler::FinishEvent()
{
    // Reset the stack 
    Stack()->Reset();
    
    return kTRUE;
}

Bool_t AliMCEventHandler::Terminate()
{ 
    // Dummy 
    return kTRUE;
}

Bool_t AliMCEventHandler::TerminateIO()
{ 
    // Dummy
    return kTRUE;
}
    
void AliMCEventHandler::ReorderAndExpandTreeTR()
{
//
//  Reorder and expand the track reference tree in order to match the kinematics tree.
//  Copy the information from different branches into one
//
//  TreeTR
    if (fTmpTreeTR) {
	fTmpTreeTR->Delete("all");
    }
    
    if (fTmpFileTR) {
	fTmpFileTR->Close();
	delete fTmpFileTR;
    }

    fTmpFileTR = new TFile("TrackRefsTmp.root", "recreate");
    fTmpTreeTR = new TTree("TreeTR", "Track References");
    if (!fTrackReferences)  fTrackReferences = new TClonesArray("AliTrackReference", 100);
    fTmpTreeTR->Branch("TrackReferences", "TClonesArray", &fTrackReferences, 4000);

//
    fTreeTR->SetBranchStatus("*",      0);
    fTreeTR->SetBranchStatus("AliRun", 1);
    fTreeTR->SetBranchStatus("ITS",    1);
    fTreeTR->SetBranchStatus("TPC",    1);
    fTreeTR->SetBranchStatus("TRD",    1);
    fTreeTR->SetBranchStatus("TOF",    1);
    fTreeTR->SetBranchStatus("FRAME",  1);
    fTreeTR->SetBranchStatus("MUON",   1);

    TClonesArray* trefs[7];
    for (Int_t i = 0; i < 7; i++) trefs[i] = 0;
    if (fTreeTR){
	// make branch for central track references
	if (fTreeTR->GetBranch("AliRun")) fTreeTR->SetBranchAddress("AliRun", &trefs[0]);
	if (fTreeTR->GetBranch("ITS"))    fTreeTR->SetBranchAddress("ITS",    &trefs[1]);
	if (fTreeTR->GetBranch("TPC"))    fTreeTR->SetBranchAddress("TPC",    &trefs[2]);
	if (fTreeTR->GetBranch("TRD"))    fTreeTR->SetBranchAddress("TRD",    &trefs[3]);
	if (fTreeTR->GetBranch("TOF"))    fTreeTR->SetBranchAddress("TOF",    &trefs[4]);
	if (fTreeTR->GetBranch("FRAME"))  fTreeTR->SetBranchAddress("FRAME",  &trefs[5]);
	if (fTreeTR->GetBranch("MUON"))   fTreeTR->SetBranchAddress("MUON",   &trefs[6]);
    }

    Int_t np = fStack->GetNprimary();
    Int_t nt = fTreeTR->GetEntries();
    //
    // Loop over tracks and find the secondaries with the help of the kine tree
    Int_t ifills = 0;
    Int_t it     = 0;
    Int_t itlast = 0;
    
    for (Int_t ip = np - 1; ip > -1; ip--) {
	TParticle *part = fStack->Particle(ip);
//	printf("Particle %5d %5d %5d %5d %5d %5d \n", 
//	       ip, part->GetPdgCode(), part->GetFirstMother(), part->GetFirstDaughter(), 
//	       part->GetLastDaughter(), part->TestBit(kTransportBit));

	// Determine range of secondaries produced by this primary during transport	
	Int_t dau1  = part->GetFirstDaughter();
	if (dau1 < np) continue;  // This particle has no secondaries produced during transport
	Int_t dau2  = -1;
	if (dau1 > -1) {
	    Int_t inext = ip - 1;
	    while (dau2 < 0) {
		if (inext >= 0) {
		    part = fStack->Particle(inext);
		    dau2 =  part->GetFirstDaughter();
		    if (dau2 == -1 || dau2 < np) {
			dau2 = -1;
		    } else {
			dau2--;
		    }
		} else {
		    dau2 = fStack->GetNtrack() - 1;
		}
		inext--;
	    } // find upper bound
	}  // dau2 < 0
	

//	printf("Check (1) %5d %5d %5d %5d %5d \n", ip, np, it, dau1, dau2);
//
// Loop over reference hits and find secondary label
// First the tricky part: find the entry in treeTR than contains the hits or
// make sure that no hits exist.
//
	Bool_t hasHits   = kFALSE;
	Bool_t isOutside = kFALSE;

	it = itlast;
	while (!hasHits && !isOutside && it < nt) {
	    fTreeTR->GetEntry(it++);
	    for (Int_t ib = 0; ib < 7; ib++) {
		if (!trefs[ib]) continue;
		Int_t nh = trefs[ib]->GetEntries();
		for (Int_t ih = 0; ih < nh; ih++) {
		    AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
		    Int_t label = tr->Label();
		    if (label >= dau1 && label <= dau2) {
			hasHits = kTRUE;
			itlast = it - 1;
			break;
		    }
		    if (label > dau2 || label < ip) {
			isOutside = kTRUE;
			itlast = it - 1;
			break;
		    }
		} // hits
		if (hasHits || isOutside) break;
	    } // branches
	} // entries

	if (!hasHits) {
	    // Write empty entries
	    for (Int_t id = dau1; (id <= dau2); id++) {
		fTmpTreeTR->Fill();
		ifills++;
	    } 
	} else {
	    // Collect all hits
	    fTreeTR->GetEntry(itlast);
	    for (Int_t id = dau1; (id <= dau2) && (dau1 > -1); id++) {
		for (Int_t ib = 0; ib < 7; ib++) {
		    if (!trefs[ib]) continue;
		    Int_t nh = trefs[ib]->GetEntries();
		    for (Int_t ih = 0; ih < nh; ih++) {
			AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
			Int_t label = tr->Label();
			// Skip primaries
			if (label == ip) continue;
			if (label > dau2 || label < dau1) 
			    printf("AliMCEventHandler::Track Reference Label out of range !: %5d %5d %5d %5d \n", 
				   itlast, label, dau1, dau2);
			if (label == id) {
			    // secondary found
			    tr->SetDetectorId(ib-1);
			    Int_t nref =  fTrackReferences->GetEntriesFast();
			    TClonesArray &lref = *fTrackReferences;
			    new(lref[nref]) AliTrackReference(*tr);
			}
		    } // hits
		} // branches
		fTmpTreeTR->Fill();
		fTrackReferences->Clear();
		ifills++;
	    } // daughters
	} // has hits
    } // tracks
    //
    // Now loop again and write the primaries
    //
    it = nt - 1;
    for (Int_t ip = 0; ip < np; ip++) {
	Int_t labmax = -1;
	while (labmax < ip && it > -1) {
	    fTreeTR->GetEntry(it--);
	    for (Int_t ib = 0; ib < 7; ib++) {
		if (!trefs[ib]) continue;
		Int_t nh = trefs[ib]->GetEntries();
		// 
		// Loop over reference hits and find primary labels
		for (Int_t ih = 0; ih < nh; ih++) {
		    AliTrackReference* tr = (AliTrackReference*)  trefs[ib]->At(ih);
		    Int_t label = tr->Label();
		    if (label < np && label > labmax) {
			labmax = label;
		    }
		    
		    if (label == ip) {
			tr->SetDetectorId(ib-1);
			Int_t nref = fTrackReferences->GetEntriesFast();
			TClonesArray &lref = *fTrackReferences;
			new(lref[nref]) AliTrackReference(*tr);
		    }
		} // hits
	    } // branches
	} // entries
	it++;
	fTmpTreeTR->Fill();
	fTrackReferences->Clear();
	ifills++;
    } // tracks
    // Check
    delete fTreeTR;
    for (Int_t ib = 0; ib < 7; ib++) {
	if (trefs[ib]) delete trefs[ib];
    }

    if (ifills != fStack->GetNtrack()) 
	printf("AliMCEventHandler:Number of entries in TreeTR (%5d) unequal to TreeK (%5d) \n", 
	       ifills, fStack->GetNtrack());
    fTreeTR = fTmpTreeTR;
}
Commit	Line	Data
5fe09262	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, 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	/* $Id$ */
	17	//---------------------------------------------------------------------------------
	18	// Class AliMCEventHandler
	19	// This class gives access to MC truth during the analysis.
	20	// Monte Carlo truth is containe in the kinematics tree (produced particles) and
	21	// the tree of reference hits.
	22	//
	23	// Origin: Andreas Morsch, CERN, andreas.morsch@cern.ch
	24	//---------------------------------------------------------------------------------
	25
	26
	27
	28	#include "AliMCEventHandler.h"
	29	#include "AliTrackReference.h"
	30	#include "AliHeader.h"
	31	#include "AliStack.h"
2c36081e	32	#include "AliLog.h"
5fe09262	33
	34	#include <TTree.h>
	35	#include <TFile.h>
	36	#include <TParticle.h>
	37	#include <TClonesArray.h>
	38	#include <TDirectoryFile.h>
	39	#include <TArrow.h>
	40	#include <TMarker.h>
	41	#include <TH2F.h>
	42
	43
	44	ClassImp(AliMCEventHandler)
	45
	46	AliMCEventHandler::AliMCEventHandler() :
d2f1d9ef	47	AliVEventHandler(),
5fe09262	48	fFileE(0),
	49	fFileK(0),
	50	fFileTR(0),
	51	fTmpFileTR(0),
	52	fTreeE(0),
	53	fTreeK(0),
	54	fTreeTR(0),
	55	fTmpTreeTR(0),
	56	fStack(0),
	57	fHeader(0),
	58	fTrackReferences(0),
	59	fNEvent(-1),
	60	fEvent(-1),
	61	fNprimaries(-1),
	62	fNparticles(-1),
9aea8469	63	fPathName("./"),
	64	fExtension(""),
	65	fFileNumber(0),
	66	fEventsPerFile(0)
5fe09262	67	{
	68	// Default constructor
	69	}
	70
	71	AliMCEventHandler::AliMCEventHandler(const char* name, const char* title) :
d2f1d9ef	72	AliVEventHandler(name, title),
5fe09262	73	fFileE(0),
	74	fFileK(0),
	75	fFileTR(0),
	76	fTmpFileTR(0),
	77	fTreeE(0),
	78	fTreeK(0),
	79	fTreeTR(0),
	80	fTmpTreeTR(0),
	81	fStack(0),
	82	fHeader(new AliHeader()),
	83	fTrackReferences(new TClonesArray("AliTrackReference", 200)),
	84	fNEvent(-1),
	85	fEvent(-1),
	86	fNprimaries(-1),
	87	fNparticles(-1),
9aea8469	88	fPathName("./"),
	89	fExtension(""),
	90	fFileNumber(0),
	91	fEventsPerFile(0)
5fe09262	92	{
	93	// Constructor
	94	}
	95	AliMCEventHandler::~AliMCEventHandler()
	96	{
	97	// Destructor
	98	delete fFileE;
	99	delete fFileK;
	100	delete fFileTR;
	101	}
	102
	103	Bool_t AliMCEventHandler::InitIO(Option_t* /opt/)
	104	{
	105	// Initialize input
	106	//
0c476ce8	107	fFileE = TFile::Open(Form("%sgalice.root", fPathName));
2c36081e	108	if (!fFileE) AliFatal(Form("AliMCEventHandler:galice.root not found in directory %s ! \n", fPathName));
5fe09262	109
	110	fFileE->GetObject("TE", fTreeE);
	111	fTreeE->SetBranchAddress("Header", &fHeader);
	112	fNEvent = fTreeE->GetEntries();
	113	//
	114	// Tree K
0c476ce8	115	fFileK = TFile::Open(Form("%sKinematics%s.root", fPathName, fExtension));
2c36081e	116	if (!fFileK) AliFatal(Form("AliMCEventHandler:Kinematics.root not found in directory %s ! \n", fPathName));
9aea8469	117	fEventsPerFile = fFileK->GetNkeys() - fFileK->GetNProcessIDs();
5fe09262	118	//
5fe09262	119	// Tree TR
0c476ce8	120	fFileTR = TFile::Open(Form("%sTrackRefs%s.root", fPathName, fExtension));
2c36081e	121	if (!fFileTR) AliWarning(Form("AliMCEventHandler:TrackRefs.root not found in directory %s ! \n", fPathName));
5fe09262	122	//
5fe09262	123	// Reset the event number
2c36081e	124	fEvent = -1;
2c36081e	125	fFileNumber = 0;
9aea8469	126
2c36081e	127	AliInfo(Form("AliMCEventHandler:Number of events in this directory %5d \n", fNEvent));
5fe09262	128	return kTRUE;
	129
	130	}
	131
9aea8469	132	Bool_t AliMCEventHandler::GetEvent(Int_t iev)
	133	{
	134	// Load the event number iev
2c36081e	135	//
2c36081e	136	// Calculate the file number
9aea8469	137	Int_t inew = iev/fEventsPerFile;
	138	if (inew != fFileNumber) {
	139	fFileNumber = inew;
	140	if (!OpenFile(fFileNumber)){
	141	return kFALSE;
	142	}
	143	}
2c36081e	144	// Folder name
5fe09262	145	char folder[20];
9aea8469	146	sprintf(folder, "Event%d", iev);
2c36081e	147
5fe09262	148	// TreeE
9aea8469	149	fTreeE->GetEntry(iev);
5fe09262	150	fStack = fHeader->Stack();
	151	// Tree K
	152	TDirectoryFile* dirK = 0;
	153	fFileK->GetObject(folder, dirK);
9aea8469	154	if (!dirK) {
2c36081e	155	AliWarning(Form("AliMCEventHandler: Event #%5d not found\n", iev));
9aea8469	156	return kFALSE;
9aea8469	157	}
5fe09262	158	dirK->GetObject("TreeK", fTreeK);
	159	fStack->ConnectTree(fTreeK);
	160	fStack->GetEvent();
2d8f26f6	161
5fe09262	162	//Tree TR
2d8f26f6	163
07bd4750	164	if (fFileTR) {
2c36081e	165	TDirectoryFile* dirTR = 0;
	166	fFileTR->GetObject(folder, dirTR);
	167	dirTR->GetObject("TreeTR", fTreeTR);
	168	if (fTreeTR->GetBranch("AliRun")) {
	169	// This is an old format with one branch per detector not in synch with TreeK
	170	ReorderAndExpandTreeTR();
2d8f26f6	171	delete dirTR;
2c36081e	172	} else {
	173	// New format
	174	fTreeTR->SetBranchAddress("TrackReferences", &fTrackReferences);
	175	}
5fe09262	176	}
2d8f26f6	177
5fe09262	178	//
	179	fNparticles = fStack->GetNtrack();
	180	fNprimaries = fStack->GetNprimary();
2d8f26f6	181	AliInfo(Form("AliMCEventHandler: Event#: %5d Number of particles: %5d (all) %5d (primaries)\n",
2d8f26f6	182	fEvent, fNparticles, fNprimaries));
5fe09262	183
5fe09262	184	return kTRUE;
9aea8469	185	}
	186
	187	Bool_t AliMCEventHandler::OpenFile(Int_t i)
	188	{
	189	// Open file i
	190	Bool_t ok = kTRUE;
	191	if (i > 0) {
	192	fExtension = Form("%d", i);
	193	} else {
	194	fExtension = "";
	195	}
	196
	197
	198	delete fFileK;
3b7d72ed	199	fFileK = TFile::Open(Form("%sKinematics%s.root", fPathName, fExtension));
9aea8469	200	if (!fFileK) {
2c36081e	201	AliFatal(Form("AliMCEventHandler:Kinematics%s.root not found in directory %s ! \n", fExtension, fPathName));
9aea8469	202	ok = kFALSE;
	203	}
	204
	205	delete fFileTR;
3b7d72ed	206	fFileTR = TFile::Open(Form("%sTrackRefs%s.root", fPathName, fExtension));
9aea8469	207	if (!fFileTR) {
2c36081e	208	AliWarning(Form("AliMCEventHandler:TrackRefs%s.root not found in directory %s ! \n", fExtension, fPathName));
9aea8469	209	ok = kFALSE;
	210	}
	211
	212	return ok;
	213	}
	214
	215	Bool_t AliMCEventHandler::BeginEvent()
	216	{
	217	// Read the next event
	218	fEvent++;
	219	if (fEvent >= fNEvent) {
2c36081e	220	AliWarning(Form("AliMCEventHandler: Event number out of range %5d\n", fEvent));
9aea8469	221	return kFALSE;
	222	}
	223	return GetEvent(fEvent);
5fe09262	224	}
	225
	226	Int_t AliMCEventHandler::GetParticleAndTR(Int_t i, TParticle& particle, TClonesArray& trefs)
	227	{
	228	// Retrieve entry i
2d8f26f6	229	if (i < 0 \|\| i >= fNparticles) {
2c36081e	230	AliWarning(Form("AliMCEventHandler::GetEntry: Index out of range"));
	231	particle = 0;
	232	trefs = 0;
	233	return (-1);
	234	}
	235	particle = fStack->Particle(i);
	236	if (fFileTR) {
5fe09262	237	fTreeTR->GetEntry(fStack->TreeKEntry(i));
2c36081e	238	trefs = fTrackReferences;
2c36081e	239	return trefs->GetEntries();
5fe09262	240	} else {
2c36081e	241	trefs = 0;
2c36081e	242	return -1;
5fe09262	243	}
5fe09262	244	}
5fe09262	245
2d8f26f6	246	void AliMCEventHandler::DrawCheck(Int_t i, Int_t search)
5fe09262	247	{
5fe09262	248	// Retrieve entry i and draw momentum vector and hits
2c36081e	249	if (!fFileTR) {
	250	AliWarning("No Track Reference information available");
	251	return;
	252	}
	253
5fe09262	254	if (i > -1 && i < fNparticles) {
	255	fTreeTR->GetEntry(fStack->TreeKEntry(i));
	256	} else {
2c36081e	257	AliWarning("AliMCEventHandler::GetEntry: Index out of range");
5fe09262	258	}
2c36081e	259
36e4cfbb	260	Int_t nh = fTrackReferences->GetEntries();
36e4cfbb	261
5fe09262	262
36e4cfbb	263	if (search) {
2d8f26f6	264	while(nh <= search && i < fNparticles - 1) {
36e4cfbb	265	i++;
	266	fTreeTR->GetEntry(fStack->TreeKEntry(i));
	267	nh = fTrackReferences->GetEntries();
	268	}
	269	printf("Found Hits at %5d\n", i);
	270	}
	271	TParticle* particle = fStack->Particle(i);
	272
5fe09262	273	TH2F* h = new TH2F("", "", 100, -500, 500, 100, -500, 500);
	274	Float_t x0 = particle->Vx();
	275	Float_t y0 = particle->Vy();
	276
	277	Float_t x1 = particle->Vx() + particle->Px() * 50.;
	278	Float_t y1 = particle->Vy() + particle->Py() * 50.;
	279
	280	TArrow* a = new TArrow(x0, y0, x1, y1, 0.01);
	281	h->Draw();
	282	a->SetLineColor(2);
	283
	284	a->Draw();
	285
	286	for (Int_t ih = 0; ih < nh; ih++) {
	287	AliTrackReference* ref = (AliTrackReference*) fTrackReferences->At(ih);
	288	TMarker* m = new TMarker(ref->X(), ref->Y(), 20);
	289	m->Draw();
	290	m->SetMarkerSize(0.4);
	291
	292	}
	293	}
	294
890126ab	295	Bool_t AliMCEventHandler::Notify(const char *path)
5fe09262	296	{
5fe09262	297	// Notify about directory change
890126ab	298	// The directory is taken from the 'path' argument
36e4cfbb	299	// Reconnect trees
890126ab	300
	301	printf("AliMCEventHandler::Notify() file: %s\n", path);
	302	fPathName = Form("%s", path);
5fe09262	303	ResetIO();
	304	InitIO("");
	305	return kTRUE;
	306	}
	307
	308	void AliMCEventHandler::ResetIO()
	309	{
36e4cfbb	310	// Reset files
5fe09262	311	if (fFileE) delete fFileE;
	312	if (fFileK) delete fFileK;
	313	if (fFileTR) delete fFileTR;
	314	}
	315
	316
	317	Bool_t AliMCEventHandler::FinishEvent()
	318	{
2d8f26f6	319	// Reset the stack
2d8f26f6	320	Stack()->Reset();
2d8f26f6	321
5fe09262	322	return kTRUE;
	323	}
	324
	325	Bool_t AliMCEventHandler::Terminate()
	326	{
	327	// Dummy
	328	return kTRUE;
	329	}
	330
	331	Bool_t AliMCEventHandler::TerminateIO()
	332	{
	333	// Dummy
	334	return kTRUE;
	335	}
	336
	337	void AliMCEventHandler::ReorderAndExpandTreeTR()
	338	{
	339	//
	340	// Reorder and expand the track reference tree in order to match the kinematics tree.
	341	// Copy the information from different branches into one
	342	//
	343	// TreeTR
2d8f26f6	344	if (fTmpTreeTR) {
	345	fTmpTreeTR->Delete("all");
	346	}
	347
5fe09262	348	if (fTmpFileTR) {
	349	fTmpFileTR->Close();
	350	delete fTmpFileTR;
	351	}
	352
	353	fTmpFileTR = new TFile("TrackRefsTmp.root", "recreate");
	354	fTmpTreeTR = new TTree("TreeTR", "Track References");
	355	if (!fTrackReferences) fTrackReferences = new TClonesArray("AliTrackReference", 100);
	356	fTmpTreeTR->Branch("TrackReferences", "TClonesArray", &fTrackReferences, 4000);
2d8f26f6	357
5fe09262	358	//
808ba8bf	359	fTreeTR->SetBranchStatus("*", 0);
	360	fTreeTR->SetBranchStatus("AliRun", 1);
	361	fTreeTR->SetBranchStatus("ITS", 1);
	362	fTreeTR->SetBranchStatus("TPC", 1);
	363	fTreeTR->SetBranchStatus("TRD", 1);
	364	fTreeTR->SetBranchStatus("TOF", 1);
	365	fTreeTR->SetBranchStatus("FRAME", 1);
	366	fTreeTR->SetBranchStatus("MUON", 1);
	367
5fe09262	368	TClonesArray* trefs[7];
	369	for (Int_t i = 0; i < 7; i++) trefs[i] = 0;
	370	if (fTreeTR){
	371	// make branch for central track references
	372	if (fTreeTR->GetBranch("AliRun")) fTreeTR->SetBranchAddress("AliRun", &trefs[0]);
	373	if (fTreeTR->GetBranch("ITS")) fTreeTR->SetBranchAddress("ITS", &trefs[1]);
	374	if (fTreeTR->GetBranch("TPC")) fTreeTR->SetBranchAddress("TPC", &trefs[2]);
	375	if (fTreeTR->GetBranch("TRD")) fTreeTR->SetBranchAddress("TRD", &trefs[3]);
	376	if (fTreeTR->GetBranch("TOF")) fTreeTR->SetBranchAddress("TOF", &trefs[4]);
	377	if (fTreeTR->GetBranch("FRAME")) fTreeTR->SetBranchAddress("FRAME", &trefs[5]);
	378	if (fTreeTR->GetBranch("MUON")) fTreeTR->SetBranchAddress("MUON", &trefs[6]);
	379	}
	380
	381	Int_t np = fStack->GetNprimary();
	382	Int_t nt = fTreeTR->GetEntries();
	383	//
	384	// Loop over tracks and find the secondaries with the help of the kine tree
	385	Int_t ifills = 0;
	386	Int_t it = 0;
	387	Int_t itlast = 0;
	388
	389	for (Int_t ip = np - 1; ip > -1; ip--) {
	390	TParticle *part = fStack->Particle(ip);
	391	// printf("Particle %5d %5d %5d %5d %5d %5d \n",
	392	// ip, part->GetPdgCode(), part->GetFirstMother(), part->GetFirstDaughter(),
	393	// part->GetLastDaughter(), part->TestBit(kTransportBit));
36e4cfbb	394
36e4cfbb	395	// Determine range of secondaries produced by this primary during transport
5fe09262	396	Int_t dau1 = part->GetFirstDaughter();
36e4cfbb	397	if (dau1 < np) continue; // This particle has no secondaries produced during transport
5fe09262	398	Int_t dau2 = -1;
5fe09262	399	if (dau1 > -1) {
	400	Int_t inext = ip - 1;
	401	while (dau2 < 0) {
	402	if (inext >= 0) {
	403	part = fStack->Particle(inext);
	404	dau2 = part->GetFirstDaughter();
	405	if (dau2 == -1 \|\| dau2 < np) {
	406	dau2 = -1;
	407	} else {
	408	dau2--;
	409	}
	410	} else {
	411	dau2 = fStack->GetNtrack() - 1;
	412	}
	413	inext--;
	414	} // find upper bound
	415	} // dau2 < 0
36e4cfbb	416
5fe09262	417
5fe09262	418	// printf("Check (1) %5d %5d %5d %5d %5d \n", ip, np, it, dau1, dau2);
36e4cfbb	419	//
	420	// Loop over reference hits and find secondary label
	421	// First the tricky part: find the entry in treeTR than contains the hits or
	422	// make sure that no hits exist.
	423	//
5fe09262	424	Bool_t hasHits = kFALSE;
5fe09262	425	Bool_t isOutside = kFALSE;
36e4cfbb	426
5fe09262	427	it = itlast;
5fe09262	428	while (!hasHits && !isOutside && it < nt) {
	429	fTreeTR->GetEntry(it++);
	430	for (Int_t ib = 0; ib < 7; ib++) {
	431	if (!trefs[ib]) continue;
	432	Int_t nh = trefs[ib]->GetEntries();
	433	for (Int_t ih = 0; ih < nh; ih++) {
	434	AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
	435	Int_t label = tr->Label();
	436	if (label >= dau1 && label <= dau2) {
	437	hasHits = kTRUE;
	438	itlast = it - 1;
36e4cfbb	439	break;
5fe09262	440	}
	441	if (label > dau2 \|\| label < ip) {
	442	isOutside = kTRUE;
	443	itlast = it - 1;
36e4cfbb	444	break;
5fe09262	445	}
5fe09262	446	} // hits
36e4cfbb	447	if (hasHits \|\| isOutside) break;
5fe09262	448	} // branches
	449	} // entries
	450
	451	if (!hasHits) {
36e4cfbb	452	// Write empty entries
5fe09262	453	for (Int_t id = dau1; (id <= dau2); id++) {
	454	fTmpTreeTR->Fill();
	455	ifills++;
	456	}
	457	} else {
36e4cfbb	458	// Collect all hits
5fe09262	459	fTreeTR->GetEntry(itlast);
	460	for (Int_t id = dau1; (id <= dau2) && (dau1 > -1); id++) {
	461	for (Int_t ib = 0; ib < 7; ib++) {
	462	if (!trefs[ib]) continue;
	463	Int_t nh = trefs[ib]->GetEntries();
	464	for (Int_t ih = 0; ih < nh; ih++) {
	465	AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
	466	Int_t label = tr->Label();
	467	// Skip primaries
	468	if (label == ip) continue;
	469	if (label > dau2 \|\| label < dau1)
36e4cfbb	470	printf("AliMCEventHandler::Track Reference Label out of range !: %5d %5d %5d %5d \n",
36e4cfbb	471	itlast, label, dau1, dau2);
5fe09262	472	if (label == id) {
	473	// secondary found
	474	tr->SetDetectorId(ib-1);
	475	Int_t nref = fTrackReferences->GetEntriesFast();
	476	TClonesArray &lref = *fTrackReferences;
	477	new(lref[nref]) AliTrackReference(*tr);
	478	}
	479	} // hits
	480	} // branches
	481	fTmpTreeTR->Fill();
	482	fTrackReferences->Clear();
	483	ifills++;
	484	} // daughters
	485	} // has hits
	486	} // tracks
5fe09262	487	//
5fe09262	488	// Now loop again and write the primaries
36e4cfbb	489	//
5fe09262	490	it = nt - 1;
	491	for (Int_t ip = 0; ip < np; ip++) {
	492	Int_t labmax = -1;
	493	while (labmax < ip && it > -1) {
	494	fTreeTR->GetEntry(it--);
	495	for (Int_t ib = 0; ib < 7; ib++) {
	496	if (!trefs[ib]) continue;
	497	Int_t nh = trefs[ib]->GetEntries();
	498	//
	499	// Loop over reference hits and find primary labels
	500	for (Int_t ih = 0; ih < nh; ih++) {
	501	AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
	502	Int_t label = tr->Label();
	503	if (label < np && label > labmax) {
	504	labmax = label;
	505	}
	506
	507	if (label == ip) {
	508	tr->SetDetectorId(ib-1);
	509	Int_t nref = fTrackReferences->GetEntriesFast();
	510	TClonesArray &lref = *fTrackReferences;
	511	new(lref[nref]) AliTrackReference(*tr);
	512	}
	513	} // hits
	514	} // branches
	515	} // entries
	516	it++;
	517	fTmpTreeTR->Fill();
	518	fTrackReferences->Clear();
	519	ifills++;
	520	} // tracks
	521	// Check
808ba8bf	522	delete fTreeTR;
	523	for (Int_t ib = 0; ib < 7; ib++) {
	524	if (trefs[ib]) delete trefs[ib];
	525	}
	526
5fe09262	527	if (ifills != fStack->GetNtrack())
36e4cfbb	528	printf("AliMCEventHandler:Number of entries in TreeTR (%5d) unequal to TreeK (%5d) \n",
36e4cfbb	529	ifills, fStack->GetNtrack());
5fe09262	530	fTreeTR = fTmpTreeTR;
5fe09262	531	}