[u/mrichter/AliRoot.git] / ITS / AliITSclusterSSD.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */
////////////////////////////////////////////////////////////////////////////
//Piotr Krzysztof Skowronski                                              //
//Warsaw University of Technology                                         // 
//skowron@if.pw.edu.pl                                                    //
//                                                                        // 
// Describes set of neighbouring digits on one side of detector,          //
// that are supposed to be generated by one particle.                     //
// includes information about clusters on other side that it crosses with //
////////////////////////////////////////////////////////////////////////////

#include "TArrayI.h"
#include "TClonesArray.h"
#include "AliITSdigitSSD.h"
#include "AliITSclusterSSD.h"

ClassImp(AliITSclusterSSD)

//______________________________________________________________________
AliITSclusterSSD::AliITSclusterSSD(){
    // default constructor

    fSide        = kTRUE;
    fDigits      = 0;
    fNDigits     = 0;
    fDigitsIndex = 0;
    fNCrosses    = 0;
    fTotalSignal = -1;
    fNTracks      = -1;
    fLeftNeighbour  = kFALSE;
    fRightNeighbour = kFALSE;
    fCrossedClusterIndexes = 0;
    fConsumed=kFALSE;
}
//______________________________________________________________________
AliITSclusterSSD::AliITSclusterSSD(Int_t ndigits, Int_t *DigitIndexes, 
				   TObjArray *Digits, Bool_t side){
    // non-default constructor

    fNDigits = ndigits;
    fDigits = Digits;
    fSide = side;
    fDigitsIndex = new TArrayI(fNDigits,DigitIndexes );	
    fNCrosses    = 0;
    fCrossedClusterIndexes = new TArrayI(300);
    fLeftNeighbour  = kFALSE;
    fRightNeighbour = kFALSE;
    fTotalSignal =-1;
    fNTracks    = -1;
    fConsumed=kFALSE;
}
//______________________________________________________________________
AliITSclusterSSD::~AliITSclusterSSD(){
    // destructor

    delete fDigitsIndex;
    delete fCrossedClusterIndexes;
}
//______________________________________________________________________
AliITSclusterSSD::AliITSclusterSSD(const AliITSclusterSSD &OneSCluster) : 
    TObject(OneSCluster){
    // copy constructor

    if (this == &OneSCluster) return;
    fNDigits = OneSCluster.fNDigits;
    fSide=OneSCluster.fSide;
    fDigits=OneSCluster.fDigits;
    fDigitsIndex = new TArrayI(fNDigits);
    fLeftNeighbour  = OneSCluster.fLeftNeighbour;
    fRightNeighbour = OneSCluster.fRightNeighbour;
    fTotalSignal =-1;
    fNTracks     = -1;
    fNCrosses = OneSCluster.fNCrosses;
    fConsumed = OneSCluster.fConsumed;
    Int_t i;
    for (i = 0; i< fNCrosses ; i++){
	fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
    }
    for (i = 0; i< fNDigits ; i++){
	fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
    }
    return;
}
//______________________________________________________________________
AliITSclusterSSD& AliITSclusterSSD::operator=(const AliITSclusterSSD 
					      &OneSCluster){
    // assignment operator

    if (this == &OneSCluster) return *this;
    fNDigits = OneSCluster.fNDigits;
    fSide=OneSCluster.fSide;
    fDigits=OneSCluster.fDigits;
    fDigitsIndex = new TArrayI(fNDigits);
    fLeftNeighbour  = OneSCluster.fLeftNeighbour;
    fRightNeighbour = OneSCluster.fRightNeighbour;
    fTotalSignal =-1;
    fNTracks     = -1;
    fNCrosses = OneSCluster.fNCrosses;
    fConsumed = OneSCluster.fConsumed;
    Int_t i;
    for (i = 0; i< fNCrosses ; i++){
	fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
    }
    for (i = 0; i< fNDigits ; i++){
	fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
    }
    return *this;
}
//______________________________________________________________________
Int_t AliITSclusterSSD::SplitCluster(Int_t where, Int_t *outdigits){
    //This methods generate data necessery to make new object of this class
    //I choosen this way, because methods TClonesArray::Add* dont work
    //so I have to use constraction: new (a[i]) Creator(params...);
    //where 'a' is a TClonesArray 
    //This method generate params - see AliITSmoduleSSD::SplitCluster;
    Int_t tmp = fNDigits;
    Int_t ind = 0;

    outdigits[ind++]=(*fDigitsIndex)[where];
    //coping border strip (it is shared by this two clusters)
    for (Int_t i = (where+1); i < tmp; i++) {
	outdigits[ind++]=(*fDigitsIndex)[i];  
	//"moving" strips from this to the new one 
	(*fDigitsIndex)[i]=-1;   
	fNDigits--;   //deleting strips from this cluster
    } 
    return ind;		
}
//______________________________________________________________________
Int_t AliITSclusterSSD::GetDigitStripNo(Int_t digit){
    // return strip no of a digit
    if (digit<0) return -1;
    return (digit>(fNDigits-1)) ? -1 :
	((AliITSdigitSSD*)(fDigits->At((*fDigitsIndex)[digit])))->GetStripNumber();
}
//______________________________________________________________________
Int_t AliITSclusterSSD::GetDigitSignal(Int_t digit){
    // returns digit signal
    Int_t index,signal;
    if (digit<0||digit>=fNDigits) return -1;
    index  = (*fDigitsIndex)[digit];
    signal = ((AliITSdigitSSD*)(fDigits->At(index)))->GetSignal();
    /*
      if(signal>1.e5) printf("GetDigitSignal: digit %d index %d signal %d\n",
      digit,index, signal);
    */
    return  signal;
}
//______________________________________________________________________
void  AliITSclusterSSD::AddCross(Int_t clIndex){
    // add cluster cross to list of cluster crosses
  
    (*fCrossedClusterIndexes)[fNCrosses++] = clIndex;
}
//______________________________________________________________________
Int_t AliITSclusterSSD::GetCross(Int_t crIndex) const {
    // return crossing cluster

    return ((crIndex>-1)&&(crIndex<fNCrosses))?(*fCrossedClusterIndexes)[crIndex]:-1;
}
//______________________________________________________________________
Double_t AliITSclusterSSD::CentrOfGravity(){
    // return center of gravity of the cluster
    Float_t ret=0;
  
    if (fLeftNeighbour) ret+=(GetDigitStripNo(0)*0.5*GetDigitSignal(0));
    else ret+=(GetDigitStripNo(0)*GetDigitSignal(0));
    if (fRightNeighbour) ret+=(GetDigitStripNo(fNDigits -1)*0.5*GetDigitSignal(fNDigits -1));
    else ret+=(GetDigitStripNo(fNDigits -1)*GetDigitSignal(fNDigits-1));
    for (Int_t i=1;i<fNDigits-1;i++){
	ret +=GetDigitStripNo(i)*GetDigitSignal(i);
    }// end for i
  
    if (fTotalSignal<0) GetTotalSignal();
	
    return (ret/fTotalSignal);
}
//______________________________________________________________________
Float_t AliITSclusterSSD::GetTotalSignal(){
    // return total signal
  
    if(fTotalSignal <0){
	fTotalSignal=0;
	if (fNDigits ==1)  {
	    fTotalSignal = (Float_t)GetDigitSignal(0);
	    //printf("1 digit: signal %d \n",GetDigitSignal(0)); 
	    return fTotalSignal;
	}
	if (fLeftNeighbour) fTotalSignal += (Float_t)(0.5*GetDigitSignal(0));
	else fTotalSignal += (Float_t) GetDigitSignal(0);
	//printf("GetTotalSignal :i DigitSignal %d %d \n",0,GetDigitSignal(0));
	if (fRightNeighbour) fTotalSignal += (Float_t)(0.5*GetDigitSignal(
                                                                 fNDigits -1));
      else fTotalSignal += (Float_t)GetDigitSignal(fNDigits-1);
	//printf("GetTotalSignal :i  DigitSignal %d %d \n",fNDigits -1,GetDigitSignal(fNDigits -1));
	for (Int_t i = 1;i<fNDigits -1;i++){
	    fTotalSignal += (Float_t)GetDigitSignal(i);
	    //printf("GetTotalSignal :i  DigitSignal %d %d \n",i,GetDigitSignal(i)); 
      	}
	//printf("GetTotalSignal: fNDigits %d fTotalSignal %.0f \n",fNDigits,fTotalSignal); 
    }
    return fTotalSignal;
}
//______________________________________________________________________
Float_t  AliITSclusterSSD::GetTotalSignalError(){
    // return the error on the signal
    Float_t err =0;
    for (Int_t i =1; i<fNDigits -1; i++){
	err+=0.1*GetDigitSignal(i);   
    } 
    if (GetLeftNeighbour()){
	err+=GetDigitSignal(0);
    }else{
	err+=0.1*GetDigitSignal(0);
    } 
    if (GetRightNeighbour()){
	err+=GetDigitSignal(fNDigits -1);
    }else{
	err+=0.1*GetDigitSignal(fNDigits -1);
    }
    return err;
}
//______________________________________________________________________
void AliITSclusterSSD::DelCross(Int_t index){
    // remove cross clusters from the list of cross clusters
    Int_t i,j; //iterators

    for (i =0;i<fNCrosses;i++){
	if ((*fCrossedClusterIndexes)[i] == index){
	    for (j=i;j<fNCrosses-1;j++){
		(*fCrossedClusterIndexes)[j]=(*fCrossedClusterIndexes)[j+1];
	    }
	    fNCrosses--;
	    return; 
	}
    }
}
//______________________________________________________________________
Int_t  *AliITSclusterSSD::GetTracks(Int_t &nt){
    // return the track number of the cluster
    Int_t ntrk = GetDigit(0)->GetNTracks();
    Int_t ndig = GetNumOfDigits();
    Int_t *idig = new Int_t[ndig];
    Int_t *sdig = new Int_t[ndig];
    Int_t *itrk = new Int_t[ndig*ntrk];
    Int_t i,j,k,l,trk;
    Bool_t b;

    for(i=0;i<ndig;i++){idig[i] = i;sdig[i] = GetDigit(i)->GetSignal();}
    TMath::Sort(ndig,sdig,idig,kTRUE);
    for(i=0;i<ndig*ntrk;i++) itrk[i] = -3;
    j = k = l = 0;
    for(i=0;i<ndig;i++){ // fill itrk with track numbers in order of digit size
	j = idig[i];
	for(k=0;k<ntrk;k++) if((trk = GetDigit(j)->GetTrack(k))>=0) {
	    itrk[l] = trk;
	    l++;
	} // end for k/if
    } // end for i
    for(i=0;i<10;i++) fTrack[i] = -3;
    fTrack[0] = itrk[0]; // first element
    k = 1;
    b = kTRUE;
    for(i=1;i<l;i++){
	for(j=0;j<k;j++) if(fTrack[j]==itrk[i]) b = kFALSE;
	if(b){fTrack[k] = itrk[i]; k++;}
	if(k>9) break;
    } // end for i
    nt = k;

    delete[] idig;
    delete[] sdig;
    delete[] itrk;

    return fTrack;
/*
    Int_t *tidx=0;
    Int_t i, j,n;
    Int_t bit =0;
    Int_t ntracks=0;
    nt=0;

    for (i=0;i<10;i++) fTrack[i] = -3;
   
    //cout<<"GetTrack start -------: fNDigits ="<<fNDigits<<endl;

    for (i = 0; i<fNDigits; i++) {
	tidx = GetDigit(i)->GetTracks();
	n    = GetDigit(i)->GetNTracks();
	for (j = 0; j<n && j<10;j++) {
	    if (tidx[j] >= 0) {
		if(ntracks == 0){
		    fTrack[ntracks] = tidx[j];
		    ntracks++; 
		}else if(tidx[j] != fTrack[ntracks-1]){
		    ntracks++; 
		    if(ntracks > 9) {
			bit = 1;
			break;
		    } // end if ntracks > 9
		    fTrack[ntracks-1] = tidx[j];
		} // end if ntracke == 0
	    } // end if tidx[j] >=0
	} // 3-tracks loop for the digit 
	if(bit == 1) break;
    } // digit loop

    SetNTracks(ntracks); 
    nt = ntracks;
    return &(fTrack[0]);
*/
}
//______________________________________________________________________
Double_t AliITSclusterSSD::GetPosition(){
    // return position of the cluster
    Float_t ret;

    switch(fNDigits){
    case  1:
	ret = GetDigitStripNo(0);
	break;
    case  2:
	ret = EtaAlgorithm();
	break;       
    default:
	ret = CentrOfGravity();   
    }
    return ret;
}
//______________________________________________________________________
Double_t AliITSclusterSSD::EtaAlgorithm(){
    // algorithm for determing cluster position
    if (fNDigits != 2) return -1;

    Int_t strip1  = GetDigit(0)->GetStripNumber(); 
    Int_t strip2  = GetDigit(1)->GetStripNumber();
    Int_t signal1 = GetDigit(0)->GetSignal();
    Int_t signal2 = GetDigit(1)->GetSignal();

    Double_t eta;
  
 
    if (strip1<strip2){
	eta = ((Double_t)signal2)/((Double_t)(signal1+signal2));
	if (eta<0.04) return strip1;
	if (eta>0.96) return strip2;
	return (strip1 + 0.43478261*eta + 0.2826087);   
    } else{
	eta = ((Double_t)signal1)/((Double_t)(signal1+signal2));
	if (eta<0.04) return strip2;
	if (eta>0.96) return strip1;
	return (strip2 + 0.43478261*eta + 0.2826087);   
    }
}
//______________________________________________________________________
Double_t  AliITSclusterSSD::GetPositionError() const {
    // return the position error
    return (GetNumOfDigits()+1)/2;
}
//______________________________________________________________________
Bool_t AliITSclusterSSD::IsCrossingWith(Int_t idx) const{
    // return the cluster to which he crosses

    for (Int_t i =0; i< fNCrosses;i++){
	if (GetCross(i) == idx) return kTRUE;
    }
    return kFALSE;
}
Commit	Line	Data
ee86d557	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
88cb7938	16	/* $Id$ */
7d62fb64	17	////////////////////////////////////////////////////////////////////////////
	18	//Piotr Krzysztof Skowronski //
	19	//Warsaw University of Technology //
	20	//skowron@if.pw.edu.pl //
	21	// //
	22	// Describes set of neighbouring digits on one side of detector, //
	23	// that are supposed to be generated by one particle. //
	24	// includes information about clusters on other side that it crosses with //
	25	////////////////////////////////////////////////////////////////////////////
ee86d557	26
ee86d557	27	#include "TArrayI.h"
ee86d557	28	#include "TClonesArray.h"
e869281d	29	#include "AliITSdigitSSD.h"
b0f5e3fc	30	#include "AliITSclusterSSD.h"
	31
	32	ClassImp(AliITSclusterSSD)
	33
ee86d557	34	//______________________________________________________________________
	35	AliITSclusterSSD::AliITSclusterSSD(){
	36	// default constructor
b0f5e3fc	37
ee86d557	38	fSide = kTRUE;
	39	fDigits = 0;
	40	fNDigits = 0;
	41	fDigitsIndex = 0;
	42	fNCrosses = 0;
	43	fTotalSignal = -1;
	44	fNTracks = -1;
	45	fLeftNeighbour = kFALSE;
	46	fRightNeighbour = kFALSE;
	47	fCrossedClusterIndexes = 0;
	48	fConsumed=kFALSE;
b0f5e3fc	49	}
ee86d557	50	//______________________________________________________________________
	51	AliITSclusterSSD::AliITSclusterSSD(Int_t ndigits, Int_t *DigitIndexes,
	52	TObjArray *Digits, Bool_t side){
	53	// non-default constructor
b0f5e3fc	54
ee86d557	55	fNDigits = ndigits;
	56	fDigits = Digits;
	57	fSide = side;
	58	fDigitsIndex = new TArrayI(fNDigits,DigitIndexes );
	59	fNCrosses = 0;
	60	fCrossedClusterIndexes = new TArrayI(300);
	61	fLeftNeighbour = kFALSE;
	62	fRightNeighbour = kFALSE;
	63	fTotalSignal =-1;
	64	fNTracks = -1;
	65	fConsumed=kFALSE;
b0f5e3fc	66	}
ee86d557	67	//______________________________________________________________________
	68	AliITSclusterSSD::~AliITSclusterSSD(){
	69	// destructor
f239b2fe	70
ee86d557	71	delete fDigitsIndex;
	72	delete fCrossedClusterIndexes;
	73	}
	74	//______________________________________________________________________
ac74f489	75	AliITSclusterSSD::AliITSclusterSSD(const AliITSclusterSSD &OneSCluster) :
ac74f489	76	TObject(OneSCluster){
ee86d557	77	// copy constructor
b0f5e3fc	78
ee86d557	79	if (this == &OneSCluster) return;
	80	fNDigits = OneSCluster.fNDigits;
	81	fSide=OneSCluster.fSide;
	82	fDigits=OneSCluster.fDigits;
	83	fDigitsIndex = new TArrayI(fNDigits);
	84	fLeftNeighbour = OneSCluster.fLeftNeighbour;
	85	fRightNeighbour = OneSCluster.fRightNeighbour;
	86	fTotalSignal =-1;
	87	fNTracks = -1;
	88	fNCrosses = OneSCluster.fNCrosses;
	89	fConsumed = OneSCluster.fConsumed;
	90	Int_t i;
	91	for (i = 0; i< fNCrosses ; i++){
	92	fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
	93	}
	94	for (i = 0; i< fNDigits ; i++){
	95	fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
	96	}
	97	return;
	98	}
	99	//______________________________________________________________________
	100	AliITSclusterSSD& AliITSclusterSSD::operator=(const AliITSclusterSSD
	101	&OneSCluster){
	102	// assignment operator
f239b2fe	103
ee86d557	104	if (this == &OneSCluster) return *this;
	105	fNDigits = OneSCluster.fNDigits;
	106	fSide=OneSCluster.fSide;
	107	fDigits=OneSCluster.fDigits;
	108	fDigitsIndex = new TArrayI(fNDigits);
	109	fLeftNeighbour = OneSCluster.fLeftNeighbour;
	110	fRightNeighbour = OneSCluster.fRightNeighbour;
	111	fTotalSignal =-1;
	112	fNTracks = -1;
	113	fNCrosses = OneSCluster.fNCrosses;
	114	fConsumed = OneSCluster.fConsumed;
	115	Int_t i;
	116	for (i = 0; i< fNCrosses ; i++){
	117	fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
	118	}
	119	for (i = 0; i< fNDigits ; i++){
	120	fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
	121	}
	122	return *this;
	123	}
	124	//______________________________________________________________________
	125	Int_t AliITSclusterSSD::SplitCluster(Int_t where, Int_t *outdigits){
	126	//This methods generate data necessery to make new object of this class
	127	//I choosen this way, because methods TClonesArray::Add* dont work
	128	//so I have to use constraction: new (a[i]) Creator(params...);
	129	//where 'a' is a TClonesArray
	130	//This method generate params - see AliITSmoduleSSD::SplitCluster;
	131	Int_t tmp = fNDigits;
	132	Int_t ind = 0;
b0f5e3fc	133
b0f5e3fc	134	outdigits[ind++]=(*fDigitsIndex)[where];
ee86d557	135	//coping border strip (it is shared by this two clusters)
	136	for (Int_t i = (where+1); i < tmp; i++) {
	137	outdigits[ind++]=(*fDigitsIndex)[i];
	138	//"moving" strips from this to the new one
	139	(*fDigitsIndex)[i]=-1;
	140	fNDigits--; //deleting strips from this cluster
	141	}
	142	return ind;
b0f5e3fc	143	}
ee86d557	144	//______________________________________________________________________
	145	Int_t AliITSclusterSSD::GetDigitStripNo(Int_t digit){
	146	// return strip no of a digit
	147	if (digit<0) return -1;
	148	return (digit>(fNDigits-1)) ? -1 :
	149	((AliITSdigitSSD)(fDigits->At((fDigitsIndex)[digit])))->GetStripNumber();
b0f5e3fc	150	}
ee86d557	151	//______________________________________________________________________
	152	Int_t AliITSclusterSSD::GetDigitSignal(Int_t digit){
	153	// returns digit signal
	154	Int_t index,signal;
	155	if (digit<0\|\|digit>=fNDigits) return -1;
	156	index = (*fDigitsIndex)[digit];
	157	signal = ((AliITSdigitSSD*)(fDigits->At(index)))->GetSignal();
	158	/*
	159	if(signal>1.e5) printf("GetDigitSignal: digit %d index %d signal %d\n",
	160	digit,index, signal);
	161	*/
	162	return signal;
b0f5e3fc	163	}
ee86d557	164	//______________________________________________________________________
	165	void AliITSclusterSSD::AddCross(Int_t clIndex){
	166	// add cluster cross to list of cluster crosses
766ef0c8	167
ee86d557	168	(*fCrossedClusterIndexes)[fNCrosses++] = clIndex;
b0f5e3fc	169	}
ee86d557	170	//______________________________________________________________________
7d62fb64	171	Int_t AliITSclusterSSD::GetCross(Int_t crIndex) const {
ee86d557	172	// return crossing cluster
b0f5e3fc	173
ee86d557	174	return ((crIndex>-1)&&(crIndex<fNCrosses))?(*fCrossedClusterIndexes)[crIndex]:-1;
b0f5e3fc	175	}
ee86d557	176	//______________________________________________________________________
	177	Double_t AliITSclusterSSD::CentrOfGravity(){
	178	// return center of gravity of the cluster
	179	Float_t ret=0;
b0f5e3fc	180
ee86d557	181	if (fLeftNeighbour) ret+=(GetDigitStripNo(0)0.5GetDigitSignal(0));
	182	else ret+=(GetDigitStripNo(0)*GetDigitSignal(0));
	183	if (fRightNeighbour) ret+=(GetDigitStripNo(fNDigits -1)0.5GetDigitSignal(fNDigits -1));
	184	else ret+=(GetDigitStripNo(fNDigits -1)*GetDigitSignal(fNDigits-1));
	185	for (Int_t i=1;i<fNDigits-1;i++){
	186	ret +=GetDigitStripNo(i)*GetDigitSignal(i);
	187	}// end for i
b0f5e3fc	188
ee86d557	189	if (fTotalSignal<0) GetTotalSignal();
b0f5e3fc	190
	191	return (ret/fTotalSignal);
	192	}
ee86d557	193	//______________________________________________________________________
	194	Float_t AliITSclusterSSD::GetTotalSignal(){
	195	// return total signal
766ef0c8	196
ee86d557	197	if(fTotalSignal <0){
	198	fTotalSignal=0;
	199	if (fNDigits ==1) {
	200	fTotalSignal = (Float_t)GetDigitSignal(0);
	201	//printf("1 digit: signal %d \n",GetDigitSignal(0));
	202	return fTotalSignal;
	203	}
	204	if (fLeftNeighbour) fTotalSignal += (Float_t)(0.5*GetDigitSignal(0));
	205	else fTotalSignal += (Float_t) GetDigitSignal(0);
	206	//printf("GetTotalSignal :i DigitSignal %d %d \n",0,GetDigitSignal(0));
	207	if (fRightNeighbour) fTotalSignal += (Float_t)(0.5*GetDigitSignal(
	208	fNDigits -1));
b0f5e3fc	209	else fTotalSignal += (Float_t)GetDigitSignal(fNDigits-1);
ee86d557	210	//printf("GetTotalSignal :i DigitSignal %d %d \n",fNDigits -1,GetDigitSignal(fNDigits -1));
	211	for (Int_t i = 1;i<fNDigits -1;i++){
	212	fTotalSignal += (Float_t)GetDigitSignal(i);
	213	//printf("GetTotalSignal :i DigitSignal %d %d \n",i,GetDigitSignal(i));
b0f5e3fc	214	}
ee86d557	215	//printf("GetTotalSignal: fNDigits %d fTotalSignal %.0f \n",fNDigits,fTotalSignal);
b0f5e3fc	216	}
ee86d557	217	return fTotalSignal;
b0f5e3fc	218	}
ee86d557	219	//______________________________________________________________________
	220	Float_t AliITSclusterSSD::GetTotalSignalError(){
	221	// return the error on the signal
	222	Float_t err =0;
	223	for (Int_t i =1; i<fNDigits -1; i++){
	224	err+=0.1*GetDigitSignal(i);
b0f5e3fc	225	}
ee86d557	226	if (GetLeftNeighbour()){
	227	err+=GetDigitSignal(0);
	228	}else{
	229	err+=0.1*GetDigitSignal(0);
	230	}
	231	if (GetRightNeighbour()){
	232	err+=GetDigitSignal(fNDigits -1);
	233	}else{
	234	err+=0.1*GetDigitSignal(fNDigits -1);
	235	}
	236	return err;
b0f5e3fc	237	}
ee86d557	238	//______________________________________________________________________
	239	void AliITSclusterSSD::DelCross(Int_t index){
	240	// remove cross clusters from the list of cross clusters
	241	Int_t i,j; //iterators
b0f5e3fc	242
ee86d557	243	for (i =0;i<fNCrosses;i++){
	244	if ((*fCrossedClusterIndexes)[i] == index){
	245	for (j=i;j<fNCrosses-1;j++){
	246	(fCrossedClusterIndexes)[j]=(fCrossedClusterIndexes)[j+1];
	247	}
	248	fNCrosses--;
	249	return;
	250	}
	251	}
b0f5e3fc	252	}
ee86d557	253	//______________________________________________________________________
	254	Int_t *AliITSclusterSSD::GetTracks(Int_t &nt){
	255	// return the track number of the cluster
f8d9a5b8	256	Int_t ntrk = GetDigit(0)->GetNTracks();
	257	Int_t ndig = GetNumOfDigits();
	258	Int_t *idig = new Int_t[ndig];
	259	Int_t *sdig = new Int_t[ndig];
	260	Int_t itrk = new Int_t[ndigntrk];
	261	Int_t i,j,k,l,trk;
	262	Bool_t b;
	263
	264	for(i=0;i<ndig;i++){idig[i] = i;sdig[i] = GetDigit(i)->GetSignal();}
	265	TMath::Sort(ndig,sdig,idig,kTRUE);
	266	for(i=0;i<ndig*ntrk;i++) itrk[i] = -3;
	267	j = k = l = 0;
	268	for(i=0;i<ndig;i++){ // fill itrk with track numbers in order of digit size
	269	j = idig[i];
	270	for(k=0;k<ntrk;k++) if((trk = GetDigit(j)->GetTrack(k))>=0) {
	271	itrk[l] = trk;
	272	l++;
	273	} // end for k/if
	274	} // end for i
	275	for(i=0;i<10;i++) fTrack[i] = -3;
	276	fTrack[0] = itrk[0]; // first element
	277	k = 1;
	278	b = kTRUE;
	279	for(i=1;i<l;i++){
	280	for(j=0;j<k;j++) if(fTrack[j]==itrk[i]) b = kFALSE;
	281	if(b){fTrack[k] = itrk[i]; k++;}
	282	if(k>9) break;
	283	} // end for i
	284	nt = k;
	285
	286	delete[] idig;
	287	delete[] sdig;
	288	delete[] itrk;
	289
	290	return fTrack;
	291	/*
ee86d557	292	Int_t *tidx=0;
	293	Int_t i, j,n;
	294	Int_t bit =0;
	295	Int_t ntracks=0;
	296	nt=0;
b0f5e3fc	297
ee86d557	298	for (i=0;i<10;i++) fTrack[i] = -3;
b0f5e3fc	299
ee86d557	300	//cout<<"GetTrack start -------: fNDigits ="<<fNDigits<<endl;
b0f5e3fc	301
ee86d557	302	for (i = 0; i<fNDigits; i++) {
	303	tidx = GetDigit(i)->GetTracks();
	304	n = GetDigit(i)->GetNTracks();
	305	for (j = 0; j<n && j<10;j++) {
	306	if (tidx[j] >= 0) {
	307	if(ntracks == 0){
	308	fTrack[ntracks] = tidx[j];
	309	ntracks++;
	310	}else if(tidx[j] != fTrack[ntracks-1]){
	311	ntracks++;
	312	if(ntracks > 9) {
	313	bit = 1;
	314	break;
	315	} // end if ntracks > 9
	316	fTrack[ntracks-1] = tidx[j];
	317	} // end if ntracke == 0
	318	} // end if tidx[j] >=0
	319	} // 3-tracks loop for the digit
	320	if(bit == 1) break;
	321	} // digit loop
f239b2fe	322
ee86d557	323	SetNTracks(ntracks);
	324	nt = ntracks;
	325	return &(fTrack[0]);
f8d9a5b8	326	*/
b0f5e3fc	327	}
ee86d557	328	//______________________________________________________________________
	329	Double_t AliITSclusterSSD::GetPosition(){
	330	// return position of the cluster
	331	Float_t ret;
b0f5e3fc	332
ee86d557	333	switch(fNDigits){
	334	case 1:
	335	ret = GetDigitStripNo(0);
	336	break;
	337	case 2:
	338	ret = EtaAlgorithm();
	339	break;
	340	default:
	341	ret = CentrOfGravity();
	342	}
	343	return ret;
b0f5e3fc	344	}
ee86d557	345	//______________________________________________________________________
	346	Double_t AliITSclusterSSD::EtaAlgorithm(){
	347	// algorithm for determing cluster position
	348	if (fNDigits != 2) return -1;
b0f5e3fc	349
ee86d557	350	Int_t strip1 = GetDigit(0)->GetStripNumber();
	351	Int_t strip2 = GetDigit(1)->GetStripNumber();
	352	Int_t signal1 = GetDigit(0)->GetSignal();
	353	Int_t signal2 = GetDigit(1)->GetSignal();
b0f5e3fc	354
ee86d557	355	Double_t eta;
b0f5e3fc	356
b0f5e3fc	357
ee86d557	358	if (strip1<strip2){
	359	eta = ((Double_t)signal2)/((Double_t)(signal1+signal2));
	360	if (eta<0.04) return strip1;
	361	if (eta>0.96) return strip2;
	362	return (strip1 + 0.43478261*eta + 0.2826087);
	363	} else{
	364	eta = ((Double_t)signal1)/((Double_t)(signal1+signal2));
	365	if (eta<0.04) return strip2;
	366	if (eta>0.96) return strip1;
	367	return (strip2 + 0.43478261*eta + 0.2826087);
	368	}
b0f5e3fc	369	}
ee86d557	370	//______________________________________________________________________
7d62fb64	371	Double_t AliITSclusterSSD::GetPositionError() const {
ee86d557	372	// return the position error
ee86d557	373	return (GetNumOfDigits()+1)/2;
b0f5e3fc	374	}
ee86d557	375	//______________________________________________________________________
7d62fb64	376	Bool_t AliITSclusterSSD::IsCrossingWith(Int_t idx) const{
ee86d557	377	// return the cluster to which he crosses
b0f5e3fc	378
ee86d557	379	for (Int_t i =0; i< fNCrosses;i++){
	380	if (GetCross(i) == idx) return kTRUE;
	381	}
	382	return kFALSE;
b0f5e3fc	383	}