[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 1.4  2000/10/05 16:01:49  kowal2
Corrected for memory leaks.

Revision 1.3  2000/06/30 12:07:49  kowal2
Updated from the TPC-PreRelease branch

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"
#include <TClonesArray.h>


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

AliSimDigits::AliSimDigits()
{
  //  AliDigits::Invalite();
  fTracks = 0;
  fTrIndex = 0;  
  InvalidateTrack();
}
AliSimDigits::~AliSimDigits()
{

  if (fTracks != 0) {
    delete fTracks;
  }
  if (fTrIndex != 0) { 
    delete fTrIndex;
  } 

}

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 * pindex = 

  
  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  
  
  Int_t *cbuff=fTracks->GetArray(); //MI change

  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 = *cbuff;  //MI change
	//	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++;
	  }
	cbuff++;  //MI change
      }//end of loop over row
      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	$Log$
407ff276	18	Revision 1.4 2000/10/05 16:01:49 kowal2
	19	Corrected for memory leaks.
	20
c4aa8648	21	Revision 1.3 2000/06/30 12:07:49 kowal2
	22	Updated from the TPC-PreRelease branch
	23
73042f01	24	Revision 1.2.4.3 2000/06/26 07:39:42 kowal2
	25	Changes to obey the coding rules
	26
	27	Revision 1.2.4.2 2000/06/25 08:38:41 kowal2
	28	Splitted from AliTPCtracking
	29
	30	Revision 1.2.4.1 2000/06/14 16:45:13 kowal2
	31	Improved algorithms. Compiler warnings removed.
	32
	33	Revision 1.2 2000/04/17 09:37:33 kowal2
	34	removed obsolete AliTPCDigitsDisplay.C
	35
cc80f89e	36	Revision 1.1.4.2 2000/04/10 11:37:42 kowal2
	37
	38	Digits handling in a new data structure
	39
	40	*/
	41
73042f01	42	//
cc80f89e	43
	44	///////////////////////////////////////////////////////////////////////////////
	45	// //
	46	// Alice segment manager object //
	47	//
	48	// AliSimDigits object (derived from AliDigits) //
	49	// provide additional track information to digit //
	50	//
	51	// Origin: Marian Ivanov GSI Darmstadt //
	52	//
	53	// //
	54	// //
	55	///////////////////////////////////////////////////////////////////////////////
	56
	57	#include "TClass.h"
	58	#include <iostream.h>
	59	#include "TError.h"
	60	#include "AliSegmentID.h"
	61	#include "AliH2F.h"
	62	#include "AliArrayI.h"
	63	#include "AliArrayS.h"
	64	#include "AliDigits.h"
	65	#include "AliSimDigits.h"
	66	#include "AliTPC.h"
c4aa8648	67	#include <TClonesArray.h>
cc80f89e	68
	69
	70
	71	//_____________________________________________________________________________
	72	//_____________________________________________________________________________
	73	//_____________________________________________________________________________
	74	ClassImp(AliSimDigits)
	75
	76	AliSimDigits::AliSimDigits()
	77	{
	78	// AliDigits::Invalite();
	79	fTracks = 0;
	80	fTrIndex = 0;
	81	InvalidateTrack();
	82	}
	83	AliSimDigits::~AliSimDigits()
	84	{
c4aa8648	85
	86	if (fTracks != 0) {
	87	delete fTracks;
	88	}
	89	if (fTrIndex != 0) {
	90	delete fTrIndex;
	91	}
cc80f89e	92
	93	}
	94
	95	void AliSimDigits::InvalidateTrack()
	96	{
	97	//
	98	//set default (invalid parameters)
	99	if ( fTracks != 0) delete fTracks;
	100	fTracks = new AliArrayI;
	101	if ( fTrIndex != 0) delete fTrIndex;
	102	fTrIndex = new AliArrayI;
	103
	104	for (Int_t i = 0; i<3; i++){
	105	fTracks->Set(0);
	106	fTrIndex->Set(0);
	107	}
	108	}
	109
	110	void AliSimDigits::AllocateTrack(Int_t length)
	111	{
	112	//
	113	//construct empty buffer fElements and fTracks with size fNrows x fNcols x
	114	//length
	115	InvalidateTrack();
	116	fNlevel = length;
	117	fTracks->Set(fNcolsfNrowsfNlevel);
	118	fTrIndex->Set(0);
	119	fTrBufType =0;
	120	}
	121
	122	Int_t AliSimDigits::GetTrackID(Int_t row, Int_t column, Int_t level)
	123	{
	124	//
	125	//Get track ID
	126	if (fTrBufType == 0) return GetTrackIDFast(row, column,level);
	127	if (fTrBufType == 1) return GetTrackID1(row, column,level);
	128	if (fTrBufType == 2) return GetTrackID2(row, column,level);
	129	return 0;
	130	}
	131
	132	void AliSimDigits::ExpandTrackBuffer()
	133	{
	134	//
	135	//expand buffer to two dimensional array
	136	if (fTrBufType<0) {
	137	Error("ExpandBuffer", "buffer doesn't exist");
	138	return;
	139	}
	140	if (fTrBufType==0) return; //buffer expanded
	141	if (fTrBufType==1) {ExpandTrackBuffer1(); return;}
	142	if (fTrBufType==2) ExpandTrackBuffer2();
	143
	144	}
	145
	146	void AliSimDigits::CompresTrackBuffer(Int_t bufType)
	147	{
	148	//
	149	//compres buffer according buffertype algorithm
	150	//
	151	if (fTrBufType<0) {
	152	Error("CompressBuffer", "buffer doesn't exist");
	153	return;
	154	}
	155	if (fTrBufType == bufType) return;
156	//
157	if (fTrBufType>0) ExpandTrackBuffer();
158	if (fTrBufType !=0) {
159	Error("CompressBuffer", "buffer doesn't exist");
160	return;
161	}
162	//compress buffer of type 1
163
164	if (bufType==1) {CompresTrackBuffer1();return;}
165	if (bufType==2) CompresTrackBuffer2();
166
167	}
168
169	Int_t AliSimDigits::GetTrackID1(Int_t row, Int_t column, Int_t level)
170	{
171	//return track ID of digits - for buffer compresion 2
172	Int_t i,n1,n2;
173	i = level*fNcols+column;
174	if ( (i+1)>=fTrIndex->fN) n2 = fTracks->fN;
175	else
176	n2 = fTrIndex->At(i+1);
177	n1 = fTrIndex->At(i);
178	Int_t rownew = 0;
179	Int_t rowold=0;
73042f01	180	Int_t id;
cc80f89e	181	for (i = n1;(i<n2);i++){
73042f01	182	id = 0;
cc80f89e	183	Int_t num = fTracks->At(i);
	184	if (num<0) {
	185	rownew-=num;
	186	rowold = rownew;
	187	i++;
	188	if (i<n2){
	189	num = fTracks->At(i);
	190	rownew+=num;
	191	i++;
73042f01	192	id = fTracks->At(i);
cc80f89e	193	}
	194	}
	195	else {
	196	rowold = rownew;
	197	rownew+=num;
	198	i++;
73042f01	199	id = fTracks->At(i);
cc80f89e	200	}
73042f01	201	id-=2;
73042f01	202	if ( (row>=rowold) && (row<=rownew) ) return id;
cc80f89e	203	if (row < rownew ) return -2; //empty track
	204	}
	205	return -2;
	206	}
	207
	208	void AliSimDigits::ExpandTrackBuffer1()
	209	{
	210	//
73042f01	211	//expand track compressed according algorithm 1 (track id comression independent to the digit compression)
cc80f89e	212	// !!in expanded tracks we don't use fTrIndex array
	213	//
	214	fTrBufType = 0;
	215	Int_t i,j;
	216	Int_t all = fNrows*fNcols; //total number of digits
	217	Int_t elems = all*fNlevel; //length of the buffer
	218
	219	AliArrayI * buf = new AliArrayI;
	220	buf->Set(elems);
	221	fTrIndex->Set(0);
	222	//
	223	Int_t level = 0;
	224	Int_t col=0;
	225	Int_t row = 0;
73042f01	226	Int_t n=fTracks->fN;
cc80f89e	227	//
73042f01	228	for (i=0;i<n;i++){
cc80f89e	229	//oposite signa means how many unwrited (under threshold) values
	230	Int_t num = fTracks->At(i);
	231	if (num<0) row-=num; //negative number mean number of zeroes (no tracks of gibven level no need to write to array)
	232	else {
	233	i++;
73042f01	234	Int_t id = fTracks->At(i);
73042f01	235	for (j = 0; j<num; j++,row++) (buf)[levelall+col*fNrows+row]=id;
cc80f89e	236	}
	237	if (row>=fNrows) {
	238	row=0;
	239	col++;
	240	}
	241	if (col>=fNcols) {
	242	col=0;
	243	level++;
	244	}
	245	}//end of loop over digits
	246	delete fTracks;
	247	fTracks = buf;
	248	}
	249
	250	void AliSimDigits::CompresTrackBuffer1()
	251	{
	252	//
73042f01	253	//comress track according algorithm 1 (track id comression independent to the digit compression)
cc80f89e	254	//
	255	fTrBufType = 1;
	256
	257	AliArrayI * buf = new AliArrayI; //create new buffer
	258	buf->Set(fNrowsfNcolsfNlevel); //lets have the nearly the "worst case"
	259	AliArrayI * index = new AliArrayI;
	260	index->Set(fNcols*fNlevel);
407ff276	261	// Int_t * pindex =
cc80f89e	262
407ff276	263
cc80f89e	264	Int_t icurrent=-1; //current index
cc80f89e	265	Int_t izero; //number of zero
73042f01	266	Int_t inum; //number of digits with the same current track id
407ff276	267	Int_t lastID =0; //last track id
	268
	269	Int_t *cbuff=fTracks->GetArray(); //MI change
	270
cc80f89e	271	for (Int_t lev =0; lev<fNlevel; lev++){ //loop over levels
	272	for (Int_t col = 0; col<fNcols; col++){ //loop over columns
	273	izero = 0;
	274	inum = 0;
	275	lastID = 0;
	276	(index)[levfNcols+col]=icurrent+1;//set collumn pointer
73042f01	277	Int_t id=0; //current id
407ff276	278	for (Int_t row = 0; row< fNrows;row++){ //loop over rows
	279	id = *cbuff; //MI change
	280	// id = GetTrackIDFast(row,col,lev);
73042f01	281	if (id <= 0) {
cc80f89e	282	if ( inum> 0 ) { //if we have some tracks in buffer
	283	icurrent++;
	284	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	285	(*buf)[icurrent] = inum;
	286	icurrent++;
	287	(*buf)[icurrent] = lastID;
	288	inum = 0;
	289	lastID = 0;
	290	}
	291	izero++;
	292	}
	293	else
73042f01	294	if (id != lastID)
cc80f89e	295	if ( izero > 0 ) {
	296	//if we have currently izero count of non tracks digits
	297	icurrent++;
	298	if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	299	(*buf)[icurrent]= -izero; //write how many under zero
	300	inum++;
	301	izero = 0;
73042f01	302	lastID = id;
cc80f89e	303	}
cc80f89e	304	else{
73042f01	305	//if we change track id from another track id
cc80f89e	306	icurrent++;
	307	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	308	(*buf)[icurrent] = inum;
	309	icurrent++;
	310	(*buf)[icurrent] = lastID;
73042f01	311	lastID = id;
cc80f89e	312	inum = 1;
	313	izero = 0;
	314	}
	315	else {
	316	inum++;
	317	}
407ff276	318	cbuff++; //MI change
407ff276	319	}//end of loop over row
cc80f89e	320	if ( izero > 0 ) {
	321	//if we have currently izero count of non tracks digits
	322	icurrent++;
	323	if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	324	(*buf)[icurrent]= -izero; //write how many under zero
	325	}
	326	if ( inum> 0 ) { //if we have some tracks in buffer
	327	icurrent++;
	328	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	329	(*buf)[icurrent] = inum;
	330	icurrent++;
73042f01	331	(*buf)[icurrent] = id;
cc80f89e	332	}
	333	}//end of loop over columns
	334	}//end of loop over differnet track level
	335	buf->Expand(icurrent+1);
	336	delete fTracks;
	337	fTracks = buf;
	338	delete fTrIndex;
	339	fTrIndex = index;
	340	}
	341
	342
	343
	344	void AliSimDigits::ExpandTrackBuffer2()
	345	{
	346	//
73042f01	347	//comress track according algorithm 2 (track id comression according digit compression)
cc80f89e	348	fTrBufType = 0;
	349	}
	350
	351	void AliSimDigits::CompresTrackBuffer2()
	352	{
	353	//
73042f01	354	//comress track according algorithm 2 (track id comression according digit compression)
cc80f89e	355	fTrBufType = 2;
	356	}
	357
	358
	359	Int_t AliSimDigits::GetTrackID2(Int_t row, Int_t column, Int_t level)
	360	{
73042f01	361	//returnb track id of digits - for buffer compresion 2
cc80f89e	362	return -2;
	363	}
	364
	365
	366
	367	AliH2F * AliSimDigits::DrawTracks( const char *option,Int_t level,
	368	Float_t x1, Float_t x2, Float_t y1, Float_t y2)
	369	{
	370	//
	371	//draw digits in given array
	372	//
	373	//make digits histo
	374	char ch[30];
	375	sprintf(ch,"Track Segment_%d level %d ",GetID(),level );
	376	if ( (fNrows<1)\|\| (fNcols<1)) {
	377	return 0;
	378	}
	379	AliH2F * his = new AliH2F("Track histo",ch,fNrows,0,fNrows,fNcols,0,fNcols);
	380	ExpandTrackBuffer();
	381	//set histogram values
	382	for (Int_t i = 0; i<fNrows;i++)
	383	for (Int_t j = 0; j<fNcols;j++)
	384	his->Fill(i,j,GetTrackIDFast(i,j,level));
	385	if (x1>=0) {
	386	AliH2F *h2fsub = his->GetSubrange2d(x1,x2,y1,y2);
	387	delete his;
	388	his=h2fsub;
	389	}
	390	if (his==0) return 0;
	391	if (option!=0) his->Draw(option);
	392	else his->Draw();
	393	return his;
	394	}
	395
	396	TClonesArray * AliSimDigits::GenerTPCClonesArray(TClonesArray * arr)
	397	{
	398	//
	399	//generate TClonnesArray of digits
	400	//
	401	TClonesArray * digits;
	402	if (arr==0) digits=new TClonesArray("AliTPCdigit",300);
	403	else digits = arr;
	404	Int_t index = digits->GetEntriesFast();
	405	for (Int_t row =0; row<fNrows; row++)
	406	for (Int_t col =0; col<fNcols; col++){
	407	Int_t amp = GetDigit(row,col);
	408	if (amp>GetThreshold()){
	409	AliTPCdigit dig;
	410	dig.fPad = col;
	411	dig.fTime = row;
	412	dig.fSignal= amp;
	413	dig.fPadRow =fSegmentID;
	414	dig.fSector =fSegmentID;
	415	dig.fTracks[0]= GetTrackID(row,col,0);
	416	dig.fTracks[1]= GetTrackID(row,col,1);
	417	dig.fTracks[2]= GetTrackID(row,col,2);
	418	TClonesArray &ldigits = *digits;
	419	new(ldigits[index++]) AliTPCdigit(dig);
	420	}
	421	}
	422	return digits;
	423	}
	424