[u/mrichter/AliRoot.git] / TPC / AliSimDigits.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.                  *
 **************************************************************************/

/*
$Log$
Revision 1.2.4.3  2000/06/26 07:39:42  kowal2
Changes to obey the coding rules

Revision 1.2.4.2  2000/06/25 08:38:41  kowal2
Splitted from AliTPCtracking

Revision 1.2.4.1  2000/06/14 16:45:13  kowal2
Improved algorithms. Compiler warnings removed.

Revision 1.2  2000/04/17 09:37:33  kowal2
removed obsolete AliTPCDigitsDisplay.C

Revision 1.1.4.2  2000/04/10 11:37:42  kowal2

Digits handling in a new data structure

*/

//

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Alice segment manager object                                             //
//                                
//  AliSimDigits object   (derived from AliDigits)                            //
//  provide additional track information to digit                            //
//  
//   Origin: Marian Ivanov  GSI Darmstadt                                     //
//
//                                                                           //
//                                                                          //
///////////////////////////////////////////////////////////////////////////////

#include "TClass.h"
#include <iostream.h>
#include "TError.h"
#include "AliSegmentID.h"
#include "AliH2F.h"
#include "AliArrayI.h"
#include "AliArrayS.h"
#include "AliDigits.h"
#include "AliSimDigits.h"
#include "AliTPC.h"


//_____________________________________________________________________________
//_____________________________________________________________________________
//_____________________________________________________________________________
ClassImp(AliSimDigits)

AliSimDigits::AliSimDigits()
{
  //  AliDigits::Invalite();
  fTracks = 0;
  fTrIndex = 0;  
  InvalidateTrack();
}
AliSimDigits::~AliSimDigits()
{
  //  AliDigits::Invalidate();
  if (fTracks != 0) fTracks->Delete();
  if (fTrIndex != 0) fTrIndex->Delete();  

}

void AliSimDigits::InvalidateTrack() 
{ 
  //
  //set default (invalid parameters)
  if ( fTracks != 0) delete fTracks;
  fTracks = new AliArrayI;
  if ( fTrIndex  != 0) delete fTrIndex;
  fTrIndex = new AliArrayI;

  for (Int_t i = 0; i<3; i++){
    fTracks->Set(0);
    fTrIndex->Set(0);
  }
}

void  AliSimDigits::AllocateTrack(Int_t length)
{
  //
  //construct empty buffer fElements and fTracks with size fNrows x fNcols x
  //length 
  InvalidateTrack();
  fNlevel = length;
  fTracks->Set(fNcols*fNrows*fNlevel);
  fTrIndex->Set(0); 
  fTrBufType =0;
}

Int_t AliSimDigits::GetTrackID(Int_t row, Int_t column, Int_t level) 
{
  //
  //Get track ID 
  if (fTrBufType == 0) return  GetTrackIDFast(row, column,level);
  if (fTrBufType == 1) return  GetTrackID1(row, column,level); 
  if (fTrBufType == 2) return  GetTrackID2(row, column,level); 
  return 0;
}

void AliSimDigits::ExpandTrackBuffer()
{  
  //
  //expand buffer to two dimensional array 
  if (fTrBufType<0)  {
    Error("ExpandBuffer", "buffer doesn't exist");
    return;
  }
  if (fTrBufType==0)      return;  //buffer expanded
  if (fTrBufType==1)  {ExpandTrackBuffer1(); return;}
  if (fTrBufType==2)  ExpandTrackBuffer2();
 
}

void AliSimDigits::CompresTrackBuffer(Int_t bufType)
{
  //
  //compres buffer according buffertype algorithm
  //
  if (fTrBufType<0)  {
    Error("CompressBuffer", "buffer doesn't exist");
    return;
  }
  if (fTrBufType == bufType) return;
  //
  if (fTrBufType>0) ExpandTrackBuffer();
  if (fTrBufType !=0)  {
    Error("CompressBuffer", "buffer doesn't exist");
    return;
  }
  //compress buffer of type 1
  
  if (bufType==1)      {CompresTrackBuffer1();return;}
  if (bufType==2)      CompresTrackBuffer2();
   
}

Int_t  AliSimDigits::GetTrackID1(Int_t row, Int_t column, Int_t level)
{
  //return  track ID of digits - for buffer compresion 2
  Int_t i,n1,n2;
  i = level*fNcols+column;
  if ( (i+1)>=fTrIndex->fN) n2 = fTracks->fN;
  else 
    n2 = fTrIndex->At(i+1);
  n1 = fTrIndex->At(i);
  Int_t rownew = 0;
  Int_t rowold=0;
  Int_t id;
  for (i = n1;(i<n2);i++){
    id = 0;
    Int_t num = fTracks->At(i);
    if (num<0) {
      rownew-=num;  
      rowold = rownew;
      i++;
      if (i<n2){
	num = fTracks->At(i);
	rownew+=num;
	i++;
	id = fTracks->At(i);
      }
    }
    else {
      rowold = rownew;
      rownew+=num;
      i++;
      id = fTracks->At(i);
    }
    id-=2;
    if ( (row>=rowold) && (row<=rownew) ) return id;
    if (row < rownew ) return -2; //empty track
  }
  return -2;
}

void  AliSimDigits::ExpandTrackBuffer1()
{
  //
  //expand  track compressed according algorithm 1 (track id comression independent to the digit compression)
  // !!in expanded tracks we don't use fTrIndex array
  //  
  fTrBufType = 0;
  Int_t i,j;
  Int_t all   = fNrows*fNcols;  //total number of digits
  Int_t elems = all*fNlevel;  //length of the buffer

  AliArrayI * buf = new AliArrayI;
  buf->Set(elems);
  fTrIndex->Set(0);
  //
  Int_t level = 0;
  Int_t col=0;
  Int_t row = 0;
  Int_t n=fTracks->fN;
  //
  for (i=0;i<n;i++){
    //oposite signa means how many unwrited (under threshold) values
    Int_t num = fTracks->At(i);
    if (num<0) row-=num;   //negative number mean number of zeroes (no tracks of gibven level no need to write to array) 
    else {
      i++;
      Int_t id =  fTracks->At(i);
      for (j = 0; j<num; j++,row++) (*buf)[level*all+col*fNrows+row]=id;       
    }
    if (row>=fNrows) {
      row=0;
      col++;
    }
    if (col>=fNcols) {
      col=0;
      level++;
    }    
  }//end of loop over digits
  delete fTracks;
  fTracks = buf;
}

void  AliSimDigits::CompresTrackBuffer1()
{
  //
  //comress track according algorithm 1 (track id comression independent to the digit compression)
  //
  fTrBufType = 1;  

  AliArrayI *  buf = new AliArrayI;   //create  new buffer 
  buf->Set(fNrows*fNcols*fNlevel); //lets have the nearly the "worst case"
  AliArrayI *  index = new AliArrayI;
  index->Set(fNcols*fNlevel);

  Int_t icurrent=-1;  //current index
  Int_t izero;      //number of zero
  Int_t inum;      //number of digits  with the same current track id  
  Int_t lastID =0;  //last track id
  for (Int_t lev =0; lev<fNlevel; lev++){    //loop over levels 
    for (Int_t col = 0; col<fNcols; col++){    //loop over columns
      izero = 0;
      inum =  0;
      lastID = 0;
      (*index)[lev*fNcols+col]=icurrent+1;//set collumn pointer
      Int_t id=0;  //current id
      for (Int_t row = 0; row< fNrows;row++){ //loop over rows
	id = GetTrackIDFast(row,col,lev);
	if (id <= 0) {
	  if ( inum> 0 ) { //if we have some tracks in buffer
	    icurrent++;
	    if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	    (*buf)[icurrent] = inum;
	    icurrent++;
	    (*buf)[icurrent] = lastID;	
	    inum = 0;      
	    lastID = 0;
	  }
	  izero++;
	}
	else
          if (id != lastID) 
	    if ( izero > 0 ) { 
	      //if we have currently izero count of non tracks digits
	      icurrent++;	  
	      if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	      (*buf)[icurrent]= -izero;  //write how many under zero
	      inum++;
	      izero = 0;	     
	      lastID = id;
	    }
	    else{ 
	      //if we change track id from another track id	    
	      icurrent++;	  
	      if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	      (*buf)[icurrent] = inum;
	      icurrent++;
	      (*buf)[icurrent] = lastID;	
	      lastID = id;
	      inum = 1;      
	      izero = 0;
	    }	
	  else {	  
	    inum++;
	  }
	
      }//end of loop over rows
      if ( izero > 0 ) { 
	//if we have currently izero count of non tracks digits
	icurrent++;	  
	if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	(*buf)[icurrent]= -izero;  //write how many under zero	
      }
      if ( inum> 0 ) { //if we have some tracks in buffer
	icurrent++;
	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	(*buf)[icurrent] = inum;
	icurrent++;
	(*buf)[icurrent] = id;	
      }      
    }//end of loop over columns
  }//end of loop over differnet track level  
  buf->Expand(icurrent+1);
  delete fTracks;
  fTracks = buf;
  delete fTrIndex;
  fTrIndex = index;
}


void  AliSimDigits::ExpandTrackBuffer2()
{
  //
  //comress track according algorithm 2 (track id comression according  digit compression)
  fTrBufType = 0;
}

void  AliSimDigits::CompresTrackBuffer2()
{
  //
  //comress track according algorithm 2 (track id comression according  digit compression)
  fTrBufType = 2;
}


Int_t  AliSimDigits::GetTrackID2(Int_t row, Int_t column, Int_t level)
{
  //returnb track id of digits - for buffer compresion 2
  return -2;
}


AliH2F *  AliSimDigits::DrawTracks( const char *option,Int_t level, 
			      Float_t x1, Float_t x2, Float_t y1, Float_t y2)
{
  //
  //draw digits in given array
  //  
  //make digits histo 
  char ch[30];
  sprintf(ch,"Track Segment_%d level %d ",GetID(),level );
  if ( (fNrows<1)|| (fNcols<1)) {
    return 0;
  }
  AliH2F * his  = new AliH2F("Track histo",ch,fNrows,0,fNrows,fNcols,0,fNcols);
  ExpandTrackBuffer();
  //set histogram  values
  for (Int_t i = 0; i<fNrows;i++)    
    for (Int_t j = 0; j<fNcols;j++)
        his->Fill(i,j,GetTrackIDFast(i,j,level));
  if (x1>=0) {
      AliH2F *h2fsub = his->GetSubrange2d(x1,x2,y1,y2);
      delete his;
      his=h2fsub;
  }
  if (his==0) return 0;
  if (option!=0) his->Draw(option);
  else his->Draw();
  return his;  
}

TClonesArray *  AliSimDigits::GenerTPCClonesArray(TClonesArray * arr)
{
  //
  //generate TClonnesArray of digits
  //
  TClonesArray * digits;
  if (arr==0)  digits=new TClonesArray("AliTPCdigit",300);
  else digits = arr; 
  Int_t index = digits->GetEntriesFast();
  for (Int_t row =0; row<fNrows; row++)
    for (Int_t col =0; col<fNcols; col++){
      Int_t amp = GetDigit(row,col);
      if (amp>GetThreshold()){
	AliTPCdigit dig;
	dig.fPad = col;
	dig.fTime = row;
	dig.fSignal= amp;
	dig.fPadRow =fSegmentID;
	dig.fSector =fSegmentID;
	dig.fTracks[0]= GetTrackID(row,col,0);
	dig.fTracks[1]= GetTrackID(row,col,1);
	dig.fTracks[2]= GetTrackID(row,col,2);
	TClonesArray &ldigits = *digits;
	new(ldigits[index++]) AliTPCdigit(dig);
      }
    }    
  return digits;
}
Commit	Line	Data
cc80f89e	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	/*
	17	$Log$
73042f01	18	Revision 1.2.4.3 2000/06/26 07:39:42 kowal2
	19	Changes to obey the coding rules
	20
	21	Revision 1.2.4.2 2000/06/25 08:38:41 kowal2
	22	Splitted from AliTPCtracking
	23
	24	Revision 1.2.4.1 2000/06/14 16:45:13 kowal2
	25	Improved algorithms. Compiler warnings removed.
	26
	27	Revision 1.2 2000/04/17 09:37:33 kowal2
	28	removed obsolete AliTPCDigitsDisplay.C
	29
cc80f89e	30	Revision 1.1.4.2 2000/04/10 11:37:42 kowal2
	31
	32	Digits handling in a new data structure
	33
	34	*/
	35
73042f01	36	//
cc80f89e	37
	38	///////////////////////////////////////////////////////////////////////////////
	39	// //
	40	// Alice segment manager object //
	41	//
	42	// AliSimDigits object (derived from AliDigits) //
	43	// provide additional track information to digit //
	44	//
	45	// Origin: Marian Ivanov GSI Darmstadt //
	46	//
	47	// //
	48	// //
	49	///////////////////////////////////////////////////////////////////////////////
	50
	51	#include "TClass.h"
	52	#include <iostream.h>
	53	#include "TError.h"
	54	#include "AliSegmentID.h"
	55	#include "AliH2F.h"
	56	#include "AliArrayI.h"
	57	#include "AliArrayS.h"
	58	#include "AliDigits.h"
	59	#include "AliSimDigits.h"
	60	#include "AliTPC.h"
	61
	62
	63
	64	//_____________________________________________________________________________
	65	//_____________________________________________________________________________
	66	//_____________________________________________________________________________
	67	ClassImp(AliSimDigits)
	68
	69	AliSimDigits::AliSimDigits()
	70	{
	71	// AliDigits::Invalite();
	72	fTracks = 0;
	73	fTrIndex = 0;
	74	InvalidateTrack();
	75	}
	76	AliSimDigits::~AliSimDigits()
	77	{
	78	// AliDigits::Invalidate();
	79	if (fTracks != 0) fTracks->Delete();
	80	if (fTrIndex != 0) fTrIndex->Delete();
	81
	82	}
	83
	84	void AliSimDigits::InvalidateTrack()
	85	{
	86	//
	87	//set default (invalid parameters)
	88	if ( fTracks != 0) delete fTracks;
	89	fTracks = new AliArrayI;
	90	if ( fTrIndex != 0) delete fTrIndex;
	91	fTrIndex = new AliArrayI;
	92
	93	for (Int_t i = 0; i<3; i++){
	94	fTracks->Set(0);
	95	fTrIndex->Set(0);
	96	}
	97	}
	98
	99	void AliSimDigits::AllocateTrack(Int_t length)
	100	{
101	//
102	//construct empty buffer fElements and fTracks with size fNrows x fNcols x
103	//length
104	InvalidateTrack();
105	fNlevel = length;
106	fTracks->Set(fNcolsfNrowsfNlevel);
107	fTrIndex->Set(0);
108	fTrBufType =0;
109	}
110
111	Int_t AliSimDigits::GetTrackID(Int_t row, Int_t column, Int_t level)
112	{
113	//
114	//Get track ID
115	if (fTrBufType == 0) return GetTrackIDFast(row, column,level);
116	if (fTrBufType == 1) return GetTrackID1(row, column,level);
117	if (fTrBufType == 2) return GetTrackID2(row, column,level);
118	return 0;
119	}
120
121	void AliSimDigits::ExpandTrackBuffer()
122	{
123	//
124	//expand buffer to two dimensional array
125	if (fTrBufType<0) {
126	Error("ExpandBuffer", "buffer doesn't exist");
127	return;
128	}
129	if (fTrBufType==0) return; //buffer expanded
130	if (fTrBufType==1) {ExpandTrackBuffer1(); return;}
131	if (fTrBufType==2) ExpandTrackBuffer2();
132
133	}
134
135	void AliSimDigits::CompresTrackBuffer(Int_t bufType)
136	{
137	//
138	//compres buffer according buffertype algorithm
139	//
140	if (fTrBufType<0) {
141	Error("CompressBuffer", "buffer doesn't exist");
142	return;
143	}
144	if (fTrBufType == bufType) return;
145	//
146	if (fTrBufType>0) ExpandTrackBuffer();
147	if (fTrBufType !=0) {
148	Error("CompressBuffer", "buffer doesn't exist");
149	return;
150	}
151	//compress buffer of type 1
152
153	if (bufType==1) {CompresTrackBuffer1();return;}
154	if (bufType==2) CompresTrackBuffer2();
155
156	}
157
158	Int_t AliSimDigits::GetTrackID1(Int_t row, Int_t column, Int_t level)
159	{
160	//return track ID of digits - for buffer compresion 2
161	Int_t i,n1,n2;
162	i = level*fNcols+column;
163	if ( (i+1)>=fTrIndex->fN) n2 = fTracks->fN;
164	else
165	n2 = fTrIndex->At(i+1);
166	n1 = fTrIndex->At(i);
167	Int_t rownew = 0;
168	Int_t rowold=0;
73042f01	169	Int_t id;
cc80f89e	170	for (i = n1;(i<n2);i++){
73042f01	171	id = 0;
cc80f89e	172	Int_t num = fTracks->At(i);
	173	if (num<0) {
	174	rownew-=num;
	175	rowold = rownew;
	176	i++;
	177	if (i<n2){
	178	num = fTracks->At(i);
	179	rownew+=num;
	180	i++;
73042f01	181	id = fTracks->At(i);
cc80f89e	182	}
	183	}
	184	else {
	185	rowold = rownew;
	186	rownew+=num;
	187	i++;
73042f01	188	id = fTracks->At(i);
cc80f89e	189	}
73042f01	190	id-=2;
73042f01	191	if ( (row>=rowold) && (row<=rownew) ) return id;
cc80f89e	192	if (row < rownew ) return -2; //empty track
	193	}
	194	return -2;
	195	}
	196
	197	void AliSimDigits::ExpandTrackBuffer1()
	198	{
	199	//
73042f01	200	//expand track compressed according algorithm 1 (track id comression independent to the digit compression)
cc80f89e	201	// !!in expanded tracks we don't use fTrIndex array
	202	//
	203	fTrBufType = 0;
	204	Int_t i,j;
	205	Int_t all = fNrows*fNcols; //total number of digits
	206	Int_t elems = all*fNlevel; //length of the buffer
	207
	208	AliArrayI * buf = new AliArrayI;
	209	buf->Set(elems);
	210	fTrIndex->Set(0);
	211	//
	212	Int_t level = 0;
	213	Int_t col=0;
	214	Int_t row = 0;
73042f01	215	Int_t n=fTracks->fN;
cc80f89e	216	//
73042f01	217	for (i=0;i<n;i++){
cc80f89e	218	//oposite signa means how many unwrited (under threshold) values
	219	Int_t num = fTracks->At(i);
	220	if (num<0) row-=num; //negative number mean number of zeroes (no tracks of gibven level no need to write to array)
	221	else {
	222	i++;
73042f01	223	Int_t id = fTracks->At(i);
73042f01	224	for (j = 0; j<num; j++,row++) (buf)[levelall+col*fNrows+row]=id;
cc80f89e	225	}
	226	if (row>=fNrows) {
	227	row=0;
	228	col++;
	229	}
	230	if (col>=fNcols) {
	231	col=0;
	232	level++;
	233	}
	234	}//end of loop over digits
	235	delete fTracks;
	236	fTracks = buf;
	237	}
	238
	239	void AliSimDigits::CompresTrackBuffer1()
	240	{
	241	//
73042f01	242	//comress track according algorithm 1 (track id comression independent to the digit compression)
cc80f89e	243	//
	244	fTrBufType = 1;
	245
	246	AliArrayI * buf = new AliArrayI; //create new buffer
	247	buf->Set(fNrowsfNcolsfNlevel); //lets have the nearly the "worst case"
	248	AliArrayI * index = new AliArrayI;
	249	index->Set(fNcols*fNlevel);
	250
	251	Int_t icurrent=-1; //current index
	252	Int_t izero; //number of zero
73042f01	253	Int_t inum; //number of digits with the same current track id
73042f01	254	Int_t lastID =0; //last track id
cc80f89e	255	for (Int_t lev =0; lev<fNlevel; lev++){ //loop over levels
	256	for (Int_t col = 0; col<fNcols; col++){ //loop over columns
	257	izero = 0;
	258	inum = 0;
	259	lastID = 0;
	260	(index)[levfNcols+col]=icurrent+1;//set collumn pointer
73042f01	261	Int_t id=0; //current id
cc80f89e	262	for (Int_t row = 0; row< fNrows;row++){ //loop over rows
73042f01	263	id = GetTrackIDFast(row,col,lev);
73042f01	264	if (id <= 0) {
cc80f89e	265	if ( inum> 0 ) { //if we have some tracks in buffer
	266	icurrent++;
	267	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	268	(*buf)[icurrent] = inum;
	269	icurrent++;
	270	(*buf)[icurrent] = lastID;
	271	inum = 0;
	272	lastID = 0;
	273	}
	274	izero++;
	275	}
	276	else
73042f01	277	if (id != lastID)
cc80f89e	278	if ( izero > 0 ) {
	279	//if we have currently izero count of non tracks digits
	280	icurrent++;
	281	if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	282	(*buf)[icurrent]= -izero; //write how many under zero
	283	inum++;
	284	izero = 0;
73042f01	285	lastID = id;
cc80f89e	286	}
cc80f89e	287	else{
73042f01	288	//if we change track id from another track id
cc80f89e	289	icurrent++;
	290	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	291	(*buf)[icurrent] = inum;
	292	icurrent++;
	293	(*buf)[icurrent] = lastID;
73042f01	294	lastID = id;
cc80f89e	295	inum = 1;
	296	izero = 0;
	297	}
	298	else {
	299	inum++;
	300	}
	301
	302	}//end of loop over rows
	303	if ( izero > 0 ) {
	304	//if we have currently izero count of non tracks digits
	305	icurrent++;
	306	if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	307	(*buf)[icurrent]= -izero; //write how many under zero
	308	}
	309	if ( inum> 0 ) { //if we have some tracks in buffer
	310	icurrent++;
	311	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	312	(*buf)[icurrent] = inum;
	313	icurrent++;
73042f01	314	(*buf)[icurrent] = id;
cc80f89e	315	}
	316	}//end of loop over columns
	317	}//end of loop over differnet track level
	318	buf->Expand(icurrent+1);
	319	delete fTracks;
	320	fTracks = buf;
	321	delete fTrIndex;
	322	fTrIndex = index;
	323	}
	324
	325
	326
	327	void AliSimDigits::ExpandTrackBuffer2()
	328	{
	329	//
73042f01	330	//comress track according algorithm 2 (track id comression according digit compression)
cc80f89e	331	fTrBufType = 0;
	332	}
	333
	334	void AliSimDigits::CompresTrackBuffer2()
	335	{
	336	//
73042f01	337	//comress track according algorithm 2 (track id comression according digit compression)
cc80f89e	338	fTrBufType = 2;
	339	}
	340
	341
	342	Int_t AliSimDigits::GetTrackID2(Int_t row, Int_t column, Int_t level)
	343	{
73042f01	344	//returnb track id of digits - for buffer compresion 2
cc80f89e	345	return -2;
	346	}
	347
	348
	349
	350	AliH2F * AliSimDigits::DrawTracks( const char *option,Int_t level,
	351	Float_t x1, Float_t x2, Float_t y1, Float_t y2)
	352	{
	353	//
	354	//draw digits in given array
	355	//
	356	//make digits histo
	357	char ch[30];
	358	sprintf(ch,"Track Segment_%d level %d ",GetID(),level );
	359	if ( (fNrows<1)\|\| (fNcols<1)) {
	360	return 0;
	361	}
	362	AliH2F * his = new AliH2F("Track histo",ch,fNrows,0,fNrows,fNcols,0,fNcols);
	363	ExpandTrackBuffer();
	364	//set histogram values
	365	for (Int_t i = 0; i<fNrows;i++)
	366	for (Int_t j = 0; j<fNcols;j++)
	367	his->Fill(i,j,GetTrackIDFast(i,j,level));
	368	if (x1>=0) {
	369	AliH2F *h2fsub = his->GetSubrange2d(x1,x2,y1,y2);
	370	delete his;
	371	his=h2fsub;
	372	}
	373	if (his==0) return 0;
	374	if (option!=0) his->Draw(option);
	375	else his->Draw();
	376	return his;
	377	}
	378
	379	TClonesArray * AliSimDigits::GenerTPCClonesArray(TClonesArray * arr)
	380	{
	381	//
	382	//generate TClonnesArray of digits
	383	//
	384	TClonesArray * digits;
	385	if (arr==0) digits=new TClonesArray("AliTPCdigit",300);
	386	else digits = arr;
	387	Int_t index = digits->GetEntriesFast();
	388	for (Int_t row =0; row<fNrows; row++)
	389	for (Int_t col =0; col<fNcols; col++){
	390	Int_t amp = GetDigit(row,col);
	391	if (amp>GetThreshold()){
	392	AliTPCdigit dig;
	393	dig.fPad = col;
	394	dig.fTime = row;
	395	dig.fSignal= amp;
	396	dig.fPadRow =fSegmentID;
	397	dig.fSector =fSegmentID;
	398	dig.fTracks[0]= GetTrackID(row,col,0);
	399	dig.fTracks[1]= GetTrackID(row,col,1);
	400	dig.fTracks[2]= GetTrackID(row,col,2);
	401	TClonesArray &ldigits = *digits;
	402	new(ldigits[index++]) AliTPCdigit(dig);
	403	}
	404	}
	405	return digits;
	406	}
	407