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

/**************************************************************************
 * Copyright(c) 1998-2007, 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 for Kinematic Events
//     Author: Andreas Morsch, CERN
//-------------------------------------------------------------------------
#include <TArrow.h>
#include <TMarker.h>
#include <TH2F.h>
#include <TTree.h>
#include <TFile.h>
#include <TParticle.h>
#include <TClonesArray.h>
#include <TRefArray.h>

#include "AliLog.h"
#include "AliMCEvent.h"
#include "AliStack.h"
#include "AliTrackReference.h"
#include "AliHeader.h"
#include "AliGenEventHeader.h"


AliMCEvent::AliMCEvent():
    AliVEvent(),
    fStack(0),
    fMCParticles(new TClonesArray("AliMCParticle",1000)),
    fMCParticleMap(0),
    fHeader(0),
    fTRBuffer(0),
    fTrackReferences(new TClonesArray("AliTrackReference", 1000)),
    fTreeTR(0),
    fTmpTreeTR(0),
    fTmpFileTR(0),
    fNprimaries(-1),
    fNparticles(-1)
{
    // Default constructor
}

AliMCEvent::AliMCEvent(const AliMCEvent& mcEvnt) :
    AliVEvent(mcEvnt),
    fStack(0),
    fMCParticles(0),
    fMCParticleMap(0),
    fHeader(0),
    fTRBuffer(0),
    fTrackReferences(0),
    fTreeTR(0),
    fTmpTreeTR(0),
    fTmpFileTR(0),
    fNprimaries(-1),
    fNparticles(-1)
{ 
// Copy constructor
}


AliMCEvent& AliMCEvent::operator=(const AliMCEvent& mcEvnt)
{
    // assignment operator
    if (this!=&mcEvnt) { 
	AliVEvent::operator=(mcEvnt); 
    }
  
    return *this; 
}

void AliMCEvent::ConnectTreeE (TTree* tree)
{
    // Connect the event header tree
    tree->SetBranchAddress("Header", &fHeader);
}

void AliMCEvent::ConnectTreeK (TTree* tree)
{
    // Connect the kinematics tree to the stack
    fStack = fHeader->Stack();
    fStack->ConnectTree(tree);
    //
    // Load the event
    fStack->GetEvent();
    fNparticles = fStack->GetNtrack();
    fNprimaries = fStack->GetNprimary();
    Int_t iev  = fHeader->GetEvent();
    Int_t ievr = fHeader->GetEventNrInRun();
    
    AliInfo(Form("AliMCEvent# %5d %5d: Number of particles: %5d (all) %5d (primaries)\n", 
		 iev, ievr, fNparticles, fNprimaries));
 
    // This is a cache for the TParticles converted to MCParticles on user request
    if (fMCParticleMap) {
	fMCParticleMap->Clear();
	fMCParticles->Delete();
	if (fNparticles>0) fMCParticleMap->Expand(fNparticles);
    }
    else
	fMCParticleMap = new TRefArray(fNparticles);
}

void AliMCEvent::ConnectTreeTR (TTree* tree)
{
    // Connect the track reference tree
    fTreeTR = tree;
    
    if (fTreeTR->GetBranch("AliRun")) {
	if (fTmpFileTR) {
	    fTmpFileTR->Close();
	    delete fTmpFileTR;
	}
	// This is an old format with one branch per detector not in synch with TreeK
	ReorderAndExpandTreeTR();
    } else {
	// New format 
	fTreeTR->SetBranchAddress("TrackReferences", &fTRBuffer);
    }
}

Int_t AliMCEvent::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 (fTreeTR) {
	fTreeTR->GetEntry(fStack->TreeKEntry(i));
	trefs    = fTRBuffer;
	return trefs->GetEntries();
    } else {
	trefs = 0;
	return -1;
    }
}


void AliMCEvent::Clean()
{
    // Clean-up before new trees are connected
    if (fHeader) {
	delete fHeader;
	fHeader = 0;
    }

    delete fStack; fStack = 0;

    // Clear TR
    if (fTRBuffer) {
	fTRBuffer->Delete();
	delete fTRBuffer;
	fTRBuffer = 0;
    }
}

void AliMCEvent::FinishEvent()
{
  // Clean-up after event
  //    
    fStack->Reset(0);
    fMCParticles->Delete();
    fMCParticleMap->Clear();
    if (fTRBuffer)
      fTRBuffer->Delete();
    fTrackReferences->Delete();
}


void AliMCEvent::DrawCheck(Int_t i, Int_t search)
{
    //
    // Simple event display for debugging
    if (!fTreeTR) {
	AliWarning("No Track Reference information available");
	return;
    } 
    
    if (i > -1 && i < fNparticles) {
	fTreeTR->GetEntry(fStack->TreeKEntry(i));
    } else {
	AliWarning("AliMCEvent::GetEntry: Index out of range");
    }
    
    Int_t nh = fTRBuffer->GetEntries();
    
    
    if (search) {
	while(nh <= search && i < fNparticles - 1) {
	    i++;
	    fTreeTR->GetEntry(fStack->TreeKEntry(i));
	    nh =  fTRBuffer->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*) fTRBuffer->At(ih);
	TMarker* m = new TMarker(ref->X(), ref->Y(), 20);
	m->Draw();
	m->SetMarkerSize(0.4);
	
    }
}


void AliMCEvent::ReorderAndExpandTreeTR()
{
//
//  Reorder and expand the track reference tree in order to match the kinematics tree.
//  Copy the information from different branches into one
//
//  TreeTR

    fTmpFileTR = new TFile("TrackRefsTmp.root", "recreate");
    fTmpTreeTR = new TTree("TreeTR", "TrackReferences");
    if (!fTRBuffer)  fTRBuffer = new TClonesArray("AliTrackReference", 100);
    fTmpTreeTR->Branch("TrackReferences", "TClonesArray", &fTRBuffer, 32000, 0);
    

//
//  Activate the used branches only. Otherwisw we get a bad memory leak.
    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);
//
//  Connect the active branches
    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;
    TParticle* part;

    for (Int_t ip = np - 1; ip > -1; ip--) {
	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 =  fTRBuffer->GetEntriesFast();
			    TClonesArray &lref = *fTRBuffer;
			    new(lref[nref]) AliTrackReference(*tr);
			}
		    } // hits
		} // branches
		fTmpTreeTR->Fill();
		fTRBuffer->Delete();
		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 = fTRBuffer->GetEntriesFast();
			TClonesArray &lref = *fTRBuffer;
			new(lref[nref]) AliTrackReference(*tr);
		    }
		} // hits
	    } // branches
	} // entries
	it++;
	fTmpTreeTR->Fill();
	fTRBuffer->Delete();
	ifills++;
    } // tracks
    // Check


    // Clean-up
    delete fTreeTR; fTreeTR = 0;
    
    for (Int_t ib = 0; ib < 7; ib++) {
	if (trefs[ib]) {
	    trefs[ib]->Clear();
	    delete trefs[ib];
	    trefs[ib] = 0;
	}
    }

    if (ifills != fStack->GetNtrack()) 
	printf("AliMCEvent:Number of entries in TreeTR (%5d) unequal to TreeK (%5d) \n", 
	       ifills, fStack->GetNtrack());

    fTmpTreeTR->Write();
    fTreeTR = fTmpTreeTR;
}

AliMCParticle* AliMCEvent::GetTrack(Int_t i) const
{
    // Get MC Particle i
    AliMCParticle *mcParticle = 0;
    TParticle     *particle   = 0;
    TClonesArray  *trefs      = 0;
    Int_t          ntref      = 0;
    TRefArray     *rarray     = 0;
    // Out of range check
    if (i < 0 || i >= fNparticles) {
	AliWarning(Form("AliMCEvent::GetEntry: Index out of range"));
	mcParticle = 0;
	return (mcParticle);
    }
    

    //
    // First check of the MC Particle has been already cached
    if(!fMCParticleMap->At(i)) {
	// Get particle from the stack
	particle   = fStack->Particle(i);
	// Get track references from Tree TR
	if (fTreeTR) {
	    fTreeTR->GetEntry(fStack->TreeKEntry(i));
	    trefs     = fTRBuffer;
	    ntref     = trefs->GetEntriesFast();
	    rarray    = new TRefArray(ntref);
	    Int_t nen = fTrackReferences->GetEntriesFast();
	    for (Int_t j = 0; j < ntref; j++) {
		// Save the track references in a TClonesArray
		AliTrackReference* ref = dynamic_cast<AliTrackReference*>((*fTRBuffer)[j]);
		// Save the pointer in a TRefArray
		new ((*fTrackReferences)[nen]) AliTrackReference(*ref);
		rarray->AddAt((*fTrackReferences)[nen], j);
		nen++;
	    } // loop over track references for entry i
	} // if TreeTR available
	Int_t nentries = fMCParticles->GetEntriesFast();
	new ((*fMCParticles)[nentries]) AliMCParticle(particle, rarray, i);
	mcParticle = dynamic_cast<AliMCParticle*>((*fMCParticles)[nentries]);
	fMCParticleMap->AddAt(mcParticle, i);
    } else {
	mcParticle = dynamic_cast<AliMCParticle*>(fMCParticleMap->At(i));
    }
    return mcParticle;
}

 AliGenEventHeader* AliMCEvent::GenEventHeader() {return (fHeader->GenEventHeader());}

ClassImp(AliMCEvent)
Commit	Line	Data
415d9f5c	1	/**************************************************************************
	2	* Copyright(c) 1998-2007, 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	//-------------------------------------------------------------------------
	19	// Class for Kinematic Events
	20	// Author: Andreas Morsch, CERN
	21	//-------------------------------------------------------------------------
	22	#include <TArrow.h>
	23	#include <TMarker.h>
	24	#include <TH2F.h>
	25	#include <TTree.h>
	26	#include <TFile.h>
	27	#include <TParticle.h>
	28	#include <TClonesArray.h>
93df0e9b	29	#include <TRefArray.h>
415d9f5c	30
	31	#include "AliLog.h"
	32	#include "AliMCEvent.h"
	33	#include "AliStack.h"
	34	#include "AliTrackReference.h"
	35	#include "AliHeader.h"
83626b6b	36	#include "AliGenEventHeader.h"
415d9f5c	37
	38
	39	AliMCEvent::AliMCEvent():
	40	AliVEvent(),
	41	fStack(0),
	42	fMCParticles(new TClonesArray("AliMCParticle",1000)),
	43	fMCParticleMap(0),
	44	fHeader(0),
93df0e9b	45	fTRBuffer(0),
93df0e9b	46	fTrackReferences(new TClonesArray("AliTrackReference", 1000)),
415d9f5c	47	fTreeTR(0),
	48	fTmpTreeTR(0),
	49	fTmpFileTR(0),
	50	fNprimaries(-1),
	51	fNparticles(-1)
	52	{
	53	// Default constructor
	54	}
	55
	56	AliMCEvent::AliMCEvent(const AliMCEvent& mcEvnt) :
	57	AliVEvent(mcEvnt),
	58	fStack(0),
	59	fMCParticles(0),
	60	fMCParticleMap(0),
	61	fHeader(0),
93df0e9b	62	fTRBuffer(0),
415d9f5c	63	fTrackReferences(0),
	64	fTreeTR(0),
	65	fTmpTreeTR(0),
	66	fTmpFileTR(0),
	67	fNprimaries(-1),
678a0069	68	fNparticles(-1)
415d9f5c	69	{
	70	// Copy constructor
	71	}
	72
	73
	74	AliMCEvent& AliMCEvent::operator=(const AliMCEvent& mcEvnt)
	75	{
	76	// assignment operator
	77	if (this!=&mcEvnt) {
	78	AliVEvent::operator=(mcEvnt);
	79	}
	80
	81	return *this;
	82	}
	83
	84	void AliMCEvent::ConnectTreeE (TTree* tree)
	85	{
	86	// Connect the event header tree
	87	tree->SetBranchAddress("Header", &fHeader);
	88	}
	89
	90	void AliMCEvent::ConnectTreeK (TTree* tree)
	91	{
	92	// Connect the kinematics tree to the stack
	93	fStack = fHeader->Stack();
	94	fStack->ConnectTree(tree);
	95	//
	96	// Load the event
	97	fStack->GetEvent();
	98	fNparticles = fStack->GetNtrack();
	99	fNprimaries = fStack->GetNprimary();
ed97dc98	100	Int_t iev = fHeader->GetEvent();
	101	Int_t ievr = fHeader->GetEventNrInRun();
	102
	103	AliInfo(Form("AliMCEvent# %5d %5d: Number of particles: %5d (all) %5d (primaries)\n",
	104	iev, ievr, fNparticles, fNprimaries));
415d9f5c	105
	106	// This is a cache for the TParticles converted to MCParticles on user request
	107	if (fMCParticleMap) {
678a0069	108	fMCParticleMap->Clear();
ee2774b7	109	fMCParticles->Delete();
678a0069	110	if (fNparticles>0) fMCParticleMap->Expand(fNparticles);
678a0069	111	}
415d9f5c	112	else
93df0e9b	113	fMCParticleMap = new TRefArray(fNparticles);
415d9f5c	114	}
	115
	116	void AliMCEvent::ConnectTreeTR (TTree* tree)
	117	{
	118	// Connect the track reference tree
	119	fTreeTR = tree;
	120
	121	if (fTreeTR->GetBranch("AliRun")) {
	122	if (fTmpFileTR) {
	123	fTmpFileTR->Close();
	124	delete fTmpFileTR;
	125	}
	126	// This is an old format with one branch per detector not in synch with TreeK
	127	ReorderAndExpandTreeTR();
	128	} else {
	129	// New format
93df0e9b	130	fTreeTR->SetBranchAddress("TrackReferences", &fTRBuffer);
415d9f5c	131	}
	132	}
	133
	134	Int_t AliMCEvent::GetParticleAndTR(Int_t i, TParticle& particle, TClonesArray& trefs)
	135	{
	136	// Retrieve entry i
	137	if (i < 0 \|\| i >= fNparticles) {
	138	AliWarning(Form("AliMCEventHandler::GetEntry: Index out of range"));
	139	particle = 0;
	140	trefs = 0;
	141	return (-1);
	142	}
	143	particle = fStack->Particle(i);
	144	if (fTreeTR) {
	145	fTreeTR->GetEntry(fStack->TreeKEntry(i));
93df0e9b	146	trefs = fTRBuffer;
415d9f5c	147	return trefs->GetEntries();
	148	} else {
	149	trefs = 0;
	150	return -1;
	151	}
	152	}
	153
	154
	155	void AliMCEvent::Clean()
	156	{
	157	// Clean-up before new trees are connected
415d9f5c	158	if (fHeader) {
	159	delete fHeader;
	160	fHeader = 0;
	161	}
c6360f33	162
c6360f33	163	delete fStack; fStack = 0;
415d9f5c	164
415d9f5c	165	// Clear TR
93df0e9b	166	if (fTRBuffer) {
ee2774b7	167	fTRBuffer->Delete();
93df0e9b	168	delete fTRBuffer;
93df0e9b	169	fTRBuffer = 0;
415d9f5c	170	}
	171	}
	172
	173	void AliMCEvent::FinishEvent()
	174	{
f1ac8a97	175	// Clean-up after event
c6360f33	176	//
	177	fStack->Reset(0);
	178	fMCParticles->Delete();
678a0069	179	fMCParticleMap->Clear();
568d5aed	180	if (fTRBuffer)
568d5aed	181	fTRBuffer->Delete();
c6360f33	182	fTrackReferences->Delete();
415d9f5c	183	}
	184
	185
93df0e9b	186
415d9f5c	187	void AliMCEvent::DrawCheck(Int_t i, Int_t search)
	188	{
	189	//
	190	// Simple event display for debugging
	191	if (!fTreeTR) {
	192	AliWarning("No Track Reference information available");
	193	return;
	194	}
	195
	196	if (i > -1 && i < fNparticles) {
	197	fTreeTR->GetEntry(fStack->TreeKEntry(i));
	198	} else {
	199	AliWarning("AliMCEvent::GetEntry: Index out of range");
	200	}
	201
93df0e9b	202	Int_t nh = fTRBuffer->GetEntries();
415d9f5c	203
	204
	205	if (search) {
	206	while(nh <= search && i < fNparticles - 1) {
	207	i++;
	208	fTreeTR->GetEntry(fStack->TreeKEntry(i));
93df0e9b	209	nh = fTRBuffer->GetEntries();
415d9f5c	210	}
	211	printf("Found Hits at %5d\n", i);
	212	}
	213	TParticle* particle = fStack->Particle(i);
	214
	215	TH2F* h = new TH2F("", "", 100, -500, 500, 100, -500, 500);
	216	Float_t x0 = particle->Vx();
	217	Float_t y0 = particle->Vy();
	218
	219	Float_t x1 = particle->Vx() + particle->Px() * 50.;
	220	Float_t y1 = particle->Vy() + particle->Py() * 50.;
	221
	222	TArrow* a = new TArrow(x0, y0, x1, y1, 0.01);
	223	h->Draw();
	224	a->SetLineColor(2);
	225
	226	a->Draw();
	227
	228	for (Int_t ih = 0; ih < nh; ih++) {
93df0e9b	229	AliTrackReference* ref = (AliTrackReference*) fTRBuffer->At(ih);
415d9f5c	230	TMarker* m = new TMarker(ref->X(), ref->Y(), 20);
	231	m->Draw();
	232	m->SetMarkerSize(0.4);
	233
	234	}
	235	}
	236
	237
	238	void AliMCEvent::ReorderAndExpandTreeTR()
	239	{
	240	//
	241	// Reorder and expand the track reference tree in order to match the kinematics tree.
	242	// Copy the information from different branches into one
	243	//
	244	// TreeTR
	245
	246	fTmpFileTR = new TFile("TrackRefsTmp.root", "recreate");
	247	fTmpTreeTR = new TTree("TreeTR", "TrackReferences");
93df0e9b	248	if (!fTRBuffer) fTRBuffer = new TClonesArray("AliTrackReference", 100);
93df0e9b	249	fTmpTreeTR->Branch("TrackReferences", "TClonesArray", &fTRBuffer, 32000, 0);
415d9f5c	250
	251
	252	//
	253	// Activate the used branches only. Otherwisw we get a bad memory leak.
	254	fTreeTR->SetBranchStatus("*", 0);
	255	fTreeTR->SetBranchStatus("AliRun.*", 1);
	256	fTreeTR->SetBranchStatus("ITS.*", 1);
	257	fTreeTR->SetBranchStatus("TPC.*", 1);
	258	fTreeTR->SetBranchStatus("TRD.*", 1);
	259	fTreeTR->SetBranchStatus("TOF.*", 1);
	260	fTreeTR->SetBranchStatus("FRAME.*", 1);
	261	fTreeTR->SetBranchStatus("MUON.*", 1);
	262	//
	263	// Connect the active branches
	264	TClonesArray* trefs[7];
	265	for (Int_t i = 0; i < 7; i++) trefs[i] = 0;
	266	if (fTreeTR){
	267	// make branch for central track references
	268	if (fTreeTR->GetBranch("AliRun")) fTreeTR->SetBranchAddress("AliRun", &trefs[0]);
	269	if (fTreeTR->GetBranch("ITS")) fTreeTR->SetBranchAddress("ITS", &trefs[1]);
	270	if (fTreeTR->GetBranch("TPC")) fTreeTR->SetBranchAddress("TPC", &trefs[2]);
	271	if (fTreeTR->GetBranch("TRD")) fTreeTR->SetBranchAddress("TRD", &trefs[3]);
	272	if (fTreeTR->GetBranch("TOF")) fTreeTR->SetBranchAddress("TOF", &trefs[4]);
	273	if (fTreeTR->GetBranch("FRAME")) fTreeTR->SetBranchAddress("FRAME", &trefs[5]);
	274	if (fTreeTR->GetBranch("MUON")) fTreeTR->SetBranchAddress("MUON", &trefs[6]);
	275	}
	276
	277	Int_t np = fStack->GetNprimary();
	278	Int_t nt = fTreeTR->GetEntries();
	279
	280	//
	281	// Loop over tracks and find the secondaries with the help of the kine tree
	282	Int_t ifills = 0;
	283	Int_t it = 0;
	284	Int_t itlast = 0;
	285	TParticle* part;
	286
	287	for (Int_t ip = np - 1; ip > -1; ip--) {
	288	part = fStack->Particle(ip);
	289	// printf("Particle %5d %5d %5d %5d %5d %5d \n",
	290	// ip, part->GetPdgCode(), part->GetFirstMother(), part->GetFirstDaughter(),
	291	// part->GetLastDaughter(), part->TestBit(kTransportBit));
	292
	293	// Determine range of secondaries produced by this primary during transport
	294	Int_t dau1 = part->GetFirstDaughter();
	295	if (dau1 < np) continue; // This particle has no secondaries produced during transport
	296	Int_t dau2 = -1;
	297	if (dau1 > -1) {
	298	Int_t inext = ip - 1;
	299	while (dau2 < 0) {
	300	if (inext >= 0) {
	301	part = fStack->Particle(inext);
	302	dau2 = part->GetFirstDaughter();
	303	if (dau2 == -1 \|\| dau2 < np) {
	304	dau2 = -1;
	305	} else {
	306	dau2--;
	307	}
	308	} else {
	309	dau2 = fStack->GetNtrack() - 1;
	310	}
	311	inext--;
	312	} // find upper bound
	313	} // dau2 < 0
314
315
316	// printf("Check (1) %5d %5d %5d %5d %5d \n", ip, np, it, dau1, dau2);
317	//
318	// Loop over reference hits and find secondary label
319	// First the tricky part: find the entry in treeTR than contains the hits or
320	// make sure that no hits exist.
321	//
322	Bool_t hasHits = kFALSE;
323	Bool_t isOutside = kFALSE;
324
325	it = itlast;
326	while (!hasHits && !isOutside && it < nt) {
327	fTreeTR->GetEntry(it++);
328	for (Int_t ib = 0; ib < 7; ib++) {
329	if (!trefs[ib]) continue;
330	Int_t nh = trefs[ib]->GetEntries();
331	for (Int_t ih = 0; ih < nh; ih++) {
332	AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
333	Int_t label = tr->Label();
334	if (label >= dau1 && label <= dau2) {
335	hasHits = kTRUE;
336	itlast = it - 1;
337	break;
338	}
339	if (label > dau2 \|\| label < ip) {
340	isOutside = kTRUE;
341	itlast = it - 1;
342	break;
343	}
344	} // hits
345	if (hasHits \|\| isOutside) break;
346	} // branches
347	} // entries
348
349	if (!hasHits) {
350	// Write empty entries
351	for (Int_t id = dau1; (id <= dau2); id++) {
352	fTmpTreeTR->Fill();
353	ifills++;
354	}
355	} else {
356	// Collect all hits
357	fTreeTR->GetEntry(itlast);
358	for (Int_t id = dau1; (id <= dau2) && (dau1 > -1); id++) {
359	for (Int_t ib = 0; ib < 7; ib++) {
360	if (!trefs[ib]) continue;
361	Int_t nh = trefs[ib]->GetEntries();
362	for (Int_t ih = 0; ih < nh; ih++) {
363	AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
364	Int_t label = tr->Label();
365	// Skip primaries
366	if (label == ip) continue;
367	if (label > dau2 \|\| label < dau1)
368	printf("AliMCEventHandler::Track Reference Label out of range !: %5d %5d %5d %5d \n",
369	itlast, label, dau1, dau2);
370	if (label == id) {
371	// secondary found
372	tr->SetDetectorId(ib-1);
93df0e9b	373	Int_t nref = fTRBuffer->GetEntriesFast();
93df0e9b	374	TClonesArray &lref = *fTRBuffer;
415d9f5c	375	new(lref[nref]) AliTrackReference(*tr);
	376	}
	377	} // hits
	378	} // branches
	379	fTmpTreeTR->Fill();
ee2774b7	380	fTRBuffer->Delete();
415d9f5c	381	ifills++;
	382	} // daughters
	383	} // has hits
	384	} // tracks
	385
	386	//
	387	// Now loop again and write the primaries
	388	//
	389	it = nt - 1;
	390	for (Int_t ip = 0; ip < np; ip++) {
	391	Int_t labmax = -1;
	392	while (labmax < ip && it > -1) {
	393	fTreeTR->GetEntry(it--);
	394	for (Int_t ib = 0; ib < 7; ib++) {
	395	if (!trefs[ib]) continue;
	396	Int_t nh = trefs[ib]->GetEntries();
	397	//
	398	// Loop over reference hits and find primary labels
	399	for (Int_t ih = 0; ih < nh; ih++) {
	400	AliTrackReference* tr = (AliTrackReference*) trefs[ib]->At(ih);
	401	Int_t label = tr->Label();
	402	if (label < np && label > labmax) {
	403	labmax = label;
	404	}
	405
	406	if (label == ip) {
	407	tr->SetDetectorId(ib-1);
93df0e9b	408	Int_t nref = fTRBuffer->GetEntriesFast();
93df0e9b	409	TClonesArray &lref = *fTRBuffer;
415d9f5c	410	new(lref[nref]) AliTrackReference(*tr);
	411	}
	412	} // hits
	413	} // branches
	414	} // entries
	415	it++;
	416	fTmpTreeTR->Fill();
ee2774b7	417	fTRBuffer->Delete();
415d9f5c	418	ifills++;
	419	} // tracks
	420	// Check
	421
	422
	423	// Clean-up
	424	delete fTreeTR; fTreeTR = 0;
	425
	426	for (Int_t ib = 0; ib < 7; ib++) {
	427	if (trefs[ib]) {
	428	trefs[ib]->Clear();
	429	delete trefs[ib];
	430	trefs[ib] = 0;
	431	}
	432	}
	433
	434	if (ifills != fStack->GetNtrack())
	435	printf("AliMCEvent:Number of entries in TreeTR (%5d) unequal to TreeK (%5d) \n",
	436	ifills, fStack->GetNtrack());
	437
	438	fTmpTreeTR->Write();
	439	fTreeTR = fTmpTreeTR;
	440	}
	441
	442	AliMCParticle* AliMCEvent::GetTrack(Int_t i) const
	443	{
	444	// Get MC Particle i
93df0e9b	445	AliMCParticle *mcParticle = 0;
	446	TParticle *particle = 0;
	447	TClonesArray *trefs = 0;
	448	Int_t ntref = 0;
	449	TRefArray *rarray = 0;
415d9f5c	450	// Out of range check
	451	if (i < 0 \|\| i >= fNparticles) {
	452	AliWarning(Form("AliMCEvent::GetEntry: Index out of range"));
	453	mcParticle = 0;
	454	return (mcParticle);
	455	}
	456
	457
415d9f5c	458	//
	459	// First check of the MC Particle has been already cached
	460	if(!fMCParticleMap->At(i)) {
93df0e9b	461	// Get particle from the stack
	462	particle = fStack->Particle(i);
	463	// Get track references from Tree TR
	464	if (fTreeTR) {
	465	fTreeTR->GetEntry(fStack->TreeKEntry(i));
	466	trefs = fTRBuffer;
	467	ntref = trefs->GetEntriesFast();
	468	rarray = new TRefArray(ntref);
	469	Int_t nen = fTrackReferences->GetEntriesFast();
	470	for (Int_t j = 0; j < ntref; j++) {
	471	// Save the track references in a TClonesArray
	472	AliTrackReference* ref = dynamic_cast<AliTrackReference>((fTRBuffer)[j]);
	473	// Save the pointer in a TRefArray
	474	new ((fTrackReferences)[nen]) AliTrackReference(ref);
	475	rarray->AddAt((*fTrackReferences)[nen], j);
	476	nen++;
	477	} // loop over track references for entry i
	478	} // if TreeTR available
415d9f5c	479	Int_t nentries = fMCParticles->GetEntriesFast();
eee13e8d	480	new ((*fMCParticles)[nentries]) AliMCParticle(particle, rarray, i);
415d9f5c	481	mcParticle = dynamic_cast<AliMCParticle>((fMCParticles)[nentries]);
	482	fMCParticleMap->AddAt(mcParticle, i);
	483	} else {
	484	mcParticle = dynamic_cast<AliMCParticle*>(fMCParticleMap->At(i));
	485	}
415d9f5c	486	return mcParticle;
	487	}
	488
83626b6b	489	AliGenEventHeader* AliMCEvent::GenEventHeader() {return (fHeader->GenEventHeader());}
415d9f5c	490
415d9f5c	491	ClassImp(AliMCEvent)