[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 1.6  2002/01/21 17:15:23  kowal2
Better protection.

Revision 1.5  2001/11/24 16:10:22  kowal2
Faster algorithms.

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 <Riostream.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+1); //MI change - allocate +1
	    (*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+1);
	      (*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+1);
	      (*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	$Log$
19364939	18	Revision 1.6 2002/01/21 17:15:23 kowal2
	19	Better protection.
	20
a6bc70e0	21	Revision 1.5 2001/11/24 16:10:22 kowal2
	22	Faster algorithms.
	23
407ff276	24	Revision 1.4 2000/10/05 16:01:49 kowal2
	25	Corrected for memory leaks.
	26
c4aa8648	27	Revision 1.3 2000/06/30 12:07:49 kowal2
	28	Updated from the TPC-PreRelease branch
	29
73042f01	30	Revision 1.2.4.3 2000/06/26 07:39:42 kowal2
	31	Changes to obey the coding rules
	32
	33	Revision 1.2.4.2 2000/06/25 08:38:41 kowal2
	34	Splitted from AliTPCtracking
	35
	36	Revision 1.2.4.1 2000/06/14 16:45:13 kowal2
	37	Improved algorithms. Compiler warnings removed.
	38
	39	Revision 1.2 2000/04/17 09:37:33 kowal2
	40	removed obsolete AliTPCDigitsDisplay.C
	41
cc80f89e	42	Revision 1.1.4.2 2000/04/10 11:37:42 kowal2
	43
	44	Digits handling in a new data structure
	45
	46	*/
	47
73042f01	48	//
cc80f89e	49
	50	///////////////////////////////////////////////////////////////////////////////
	51	// //
	52	// Alice segment manager object //
	53	//
	54	// AliSimDigits object (derived from AliDigits) //
	55	// provide additional track information to digit //
	56	//
	57	// Origin: Marian Ivanov GSI Darmstadt //
	58	//
	59	// //
	60	// //
	61	///////////////////////////////////////////////////////////////////////////////
	62
	63	#include "TClass.h"
19364939	64	#include <Riostream.h>
cc80f89e	65	#include "TError.h"
	66	#include "AliSegmentID.h"
	67	#include "AliH2F.h"
	68	#include "AliArrayI.h"
	69	#include "AliArrayS.h"
	70	#include "AliDigits.h"
	71	#include "AliSimDigits.h"
	72	#include "AliTPC.h"
c4aa8648	73	#include <TClonesArray.h>
cc80f89e	74
	75
	76
	77	//_____________________________________________________________________________
	78	//_____________________________________________________________________________
	79	//_____________________________________________________________________________
	80	ClassImp(AliSimDigits)
	81
	82	AliSimDigits::AliSimDigits()
	83	{
	84	// AliDigits::Invalite();
	85	fTracks = 0;
	86	fTrIndex = 0;
	87	InvalidateTrack();
	88	}
	89	AliSimDigits::~AliSimDigits()
	90	{
c4aa8648	91
	92	if (fTracks != 0) {
	93	delete fTracks;
	94	}
	95	if (fTrIndex != 0) {
	96	delete fTrIndex;
	97	}
cc80f89e	98
	99	}
	100
	101	void AliSimDigits::InvalidateTrack()
	102	{
	103	//
	104	//set default (invalid parameters)
	105	if ( fTracks != 0) delete fTracks;
	106	fTracks = new AliArrayI;
	107	if ( fTrIndex != 0) delete fTrIndex;
	108	fTrIndex = new AliArrayI;
	109
	110	for (Int_t i = 0; i<3; i++){
	111	fTracks->Set(0);
	112	fTrIndex->Set(0);
	113	}
	114	}
	115
	116	void AliSimDigits::AllocateTrack(Int_t length)
	117	{
	118	//
	119	//construct empty buffer fElements and fTracks with size fNrows x fNcols x
	120	//length
	121	InvalidateTrack();
	122	fNlevel = length;
	123	fTracks->Set(fNcolsfNrowsfNlevel);
	124	fTrIndex->Set(0);
	125	fTrBufType =0;
	126	}
	127
	128	Int_t AliSimDigits::GetTrackID(Int_t row, Int_t column, Int_t level)
	129	{
	130	//
	131	//Get track ID
	132	if (fTrBufType == 0) return GetTrackIDFast(row, column,level);
	133	if (fTrBufType == 1) return GetTrackID1(row, column,level);
	134	if (fTrBufType == 2) return GetTrackID2(row, column,level);
	135	return 0;
	136	}
	137
	138	void AliSimDigits::ExpandTrackBuffer()
	139	{
	140	//
	141	//expand buffer to two dimensional array
	142	if (fTrBufType<0) {
	143	Error("ExpandBuffer", "buffer doesn't exist");
	144	return;
	145	}
	146	if (fTrBufType==0) return; //buffer expanded
	147	if (fTrBufType==1) {ExpandTrackBuffer1(); return;}
	148	if (fTrBufType==2) ExpandTrackBuffer2();
	149
	150	}
	151
	152	void AliSimDigits::CompresTrackBuffer(Int_t bufType)
	153	{
	154	//
	155	//compres buffer according buffertype algorithm
	156	//
	157	if (fTrBufType<0) {
	158	Error("CompressBuffer", "buffer doesn't exist");
	159	return;
	160	}
	161	if (fTrBufType == bufType) return;
162	//
163	if (fTrBufType>0) ExpandTrackBuffer();
164	if (fTrBufType !=0) {
165	Error("CompressBuffer", "buffer doesn't exist");
166	return;
167	}
168	//compress buffer of type 1
169
170	if (bufType==1) {CompresTrackBuffer1();return;}
171	if (bufType==2) CompresTrackBuffer2();
172
173	}
174
175	Int_t AliSimDigits::GetTrackID1(Int_t row, Int_t column, Int_t level)
176	{
177	//return track ID of digits - for buffer compresion 2
178	Int_t i,n1,n2;
179	i = level*fNcols+column;
180	if ( (i+1)>=fTrIndex->fN) n2 = fTracks->fN;
181	else
182	n2 = fTrIndex->At(i+1);
183	n1 = fTrIndex->At(i);
184	Int_t rownew = 0;
185	Int_t rowold=0;
73042f01	186	Int_t id;
cc80f89e	187	for (i = n1;(i<n2);i++){
73042f01	188	id = 0;
cc80f89e	189	Int_t num = fTracks->At(i);
	190	if (num<0) {
	191	rownew-=num;
	192	rowold = rownew;
	193	i++;
	194	if (i<n2){
	195	num = fTracks->At(i);
	196	rownew+=num;
	197	i++;
73042f01	198	id = fTracks->At(i);
cc80f89e	199	}
	200	}
	201	else {
	202	rowold = rownew;
	203	rownew+=num;
	204	i++;
73042f01	205	id = fTracks->At(i);
cc80f89e	206	}
73042f01	207	id-=2;
73042f01	208	if ( (row>=rowold) && (row<=rownew) ) return id;
cc80f89e	209	if (row < rownew ) return -2; //empty track
	210	}
	211	return -2;
	212	}
	213
	214	void AliSimDigits::ExpandTrackBuffer1()
	215	{
	216	//
73042f01	217	//expand track compressed according algorithm 1 (track id comression independent to the digit compression)
cc80f89e	218	// !!in expanded tracks we don't use fTrIndex array
	219	//
	220	fTrBufType = 0;
	221	Int_t i,j;
	222	Int_t all = fNrows*fNcols; //total number of digits
	223	Int_t elems = all*fNlevel; //length of the buffer
	224
	225	AliArrayI * buf = new AliArrayI;
	226	buf->Set(elems);
	227	fTrIndex->Set(0);
	228	//
	229	Int_t level = 0;
	230	Int_t col=0;
	231	Int_t row = 0;
73042f01	232	Int_t n=fTracks->fN;
cc80f89e	233	//
73042f01	234	for (i=0;i<n;i++){
cc80f89e	235	//oposite signa means how many unwrited (under threshold) values
	236	Int_t num = fTracks->At(i);
	237	if (num<0) row-=num; //negative number mean number of zeroes (no tracks of gibven level no need to write to array)
	238	else {
	239	i++;
73042f01	240	Int_t id = fTracks->At(i);
73042f01	241	for (j = 0; j<num; j++,row++) (buf)[levelall+col*fNrows+row]=id;
cc80f89e	242	}
	243	if (row>=fNrows) {
	244	row=0;
	245	col++;
	246	}
	247	if (col>=fNcols) {
	248	col=0;
	249	level++;
	250	}
	251	}//end of loop over digits
	252	delete fTracks;
	253	fTracks = buf;
	254	}
	255
	256	void AliSimDigits::CompresTrackBuffer1()
	257	{
	258	//
73042f01	259	//comress track according algorithm 1 (track id comression independent to the digit compression)
cc80f89e	260	//
	261	fTrBufType = 1;
	262
	263	AliArrayI * buf = new AliArrayI; //create new buffer
	264	buf->Set(fNrowsfNcolsfNlevel); //lets have the nearly the "worst case"
	265	AliArrayI * index = new AliArrayI;
	266	index->Set(fNcols*fNlevel);
407ff276	267	// Int_t * pindex =
cc80f89e	268
407ff276	269
cc80f89e	270	Int_t icurrent=-1; //current index
cc80f89e	271	Int_t izero; //number of zero
73042f01	272	Int_t inum; //number of digits with the same current track id
407ff276	273	Int_t lastID =0; //last track id
	274
	275	Int_t *cbuff=fTracks->GetArray(); //MI change
	276
cc80f89e	277	for (Int_t lev =0; lev<fNlevel; lev++){ //loop over levels
	278	for (Int_t col = 0; col<fNcols; col++){ //loop over columns
	279	izero = 0;
	280	inum = 0;
	281	lastID = 0;
	282	(index)[levfNcols+col]=icurrent+1;//set collumn pointer
73042f01	283	Int_t id=0; //current id
407ff276	284	for (Int_t row = 0; row< fNrows;row++){ //loop over rows
	285	id = *cbuff; //MI change
	286	// id = GetTrackIDFast(row,col,lev);
73042f01	287	if (id <= 0) {
cc80f89e	288	if ( inum> 0 ) { //if we have some tracks in buffer
cc80f89e	289	icurrent++;
a6bc70e0	290	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2+1); //MI change - allocate +1
cc80f89e	291	(*buf)[icurrent] = inum;
	292	icurrent++;
	293	(*buf)[icurrent] = lastID;
	294	inum = 0;
	295	lastID = 0;
	296	}
	297	izero++;
	298	}
	299	else
73042f01	300	if (id != lastID)
cc80f89e	301	if ( izero > 0 ) {
	302	//if we have currently izero count of non tracks digits
	303	icurrent++;
a6bc70e0	304	if (icurrent>=buf->fN) buf->Expand(icurrent*2+1);
cc80f89e	305	(*buf)[icurrent]= -izero; //write how many under zero
	306	inum++;
	307	izero = 0;
73042f01	308	lastID = id;
cc80f89e	309	}
cc80f89e	310	else{
73042f01	311	//if we change track id from another track id
cc80f89e	312	icurrent++;
a6bc70e0	313	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2+1);
cc80f89e	314	(*buf)[icurrent] = inum;
	315	icurrent++;
	316	(*buf)[icurrent] = lastID;
73042f01	317	lastID = id;
cc80f89e	318	inum = 1;
	319	izero = 0;
	320	}
	321	else {
	322	inum++;
	323	}
407ff276	324	cbuff++; //MI change
407ff276	325	}//end of loop over row
cc80f89e	326	if ( izero > 0 ) {
	327	//if we have currently izero count of non tracks digits
	328	icurrent++;
	329	if (icurrent>=buf->fN) buf->Expand(icurrent*2);
	330	(*buf)[icurrent]= -izero; //write how many under zero
	331	}
	332	if ( inum> 0 ) { //if we have some tracks in buffer
	333	icurrent++;
	334	if ((icurrent+1)>=buf->fN) buf->Expand(icurrent*2);
	335	(*buf)[icurrent] = inum;
	336	icurrent++;
73042f01	337	(*buf)[icurrent] = id;
cc80f89e	338	}
	339	}//end of loop over columns
	340	}//end of loop over differnet track level
	341	buf->Expand(icurrent+1);
	342	delete fTracks;
	343	fTracks = buf;
	344	delete fTrIndex;
	345	fTrIndex = index;
	346	}
	347
	348
	349
	350	void AliSimDigits::ExpandTrackBuffer2()
	351	{
	352	//
73042f01	353	//comress track according algorithm 2 (track id comression according digit compression)
cc80f89e	354	fTrBufType = 0;
	355	}
	356
	357	void AliSimDigits::CompresTrackBuffer2()
	358	{
	359	//
73042f01	360	//comress track according algorithm 2 (track id comression according digit compression)
cc80f89e	361	fTrBufType = 2;
	362	}
	363
	364
	365	Int_t AliSimDigits::GetTrackID2(Int_t row, Int_t column, Int_t level)
	366	{
73042f01	367	//returnb track id of digits - for buffer compresion 2
cc80f89e	368	return -2;
	369	}
	370
	371
	372
	373	AliH2F * AliSimDigits::DrawTracks( const char *option,Int_t level,
	374	Float_t x1, Float_t x2, Float_t y1, Float_t y2)
	375	{
	376	//
	377	//draw digits in given array
	378	//
	379	//make digits histo
	380	char ch[30];
	381	sprintf(ch,"Track Segment_%d level %d ",GetID(),level );
	382	if ( (fNrows<1)\|\| (fNcols<1)) {
	383	return 0;
	384	}
	385	AliH2F * his = new AliH2F("Track histo",ch,fNrows,0,fNrows,fNcols,0,fNcols);
	386	ExpandTrackBuffer();
	387	//set histogram values
	388	for (Int_t i = 0; i<fNrows;i++)
	389	for (Int_t j = 0; j<fNcols;j++)
	390	his->Fill(i,j,GetTrackIDFast(i,j,level));
	391	if (x1>=0) {
	392	AliH2F *h2fsub = his->GetSubrange2d(x1,x2,y1,y2);
	393	delete his;
	394	his=h2fsub;
	395	}
	396	if (his==0) return 0;
	397	if (option!=0) his->Draw(option);
	398	else his->Draw();
	399	return his;
	400	}
	401
	402	TClonesArray * AliSimDigits::GenerTPCClonesArray(TClonesArray * arr)
	403	{
	404	//
	405	//generate TClonnesArray of digits
	406	//
	407	TClonesArray * digits;
	408	if (arr==0) digits=new TClonesArray("AliTPCdigit",300);
	409	else digits = arr;
	410	Int_t index = digits->GetEntriesFast();
	411	for (Int_t row =0; row<fNrows; row++)
	412	for (Int_t col =0; col<fNcols; col++){
	413	Int_t amp = GetDigit(row,col);
	414	if (amp>GetThreshold()){
	415	AliTPCdigit dig;
	416	dig.fPad = col;
	417	dig.fTime = row;
	418	dig.fSignal= amp;
	419	dig.fPadRow =fSegmentID;
	420	dig.fSector =fSegmentID;
	421	dig.fTracks[0]= GetTrackID(row,col,0);
	422	dig.fTracks[1]= GetTrackID(row,col,1);
	423	dig.fTracks[2]= GetTrackID(row,col,2);
	424	TClonesArray &ldigits = *digits;
	425	new(ldigits[index++]) AliTPCdigit(dig);
	426	}
	427	}
	428	return digits;
	429	}
	430