[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.                  *
 **************************************************************************/

/* $Id$ */

#include <Riostream.h>
#include "TArrayI.h"
#include "TClonesArray.h"
#include "AliITSdigit.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){
    // 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){
    // 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(){
    // return the position error
    return (GetNumOfDigits()+1)/2;
}
//______________________________________________________________________
Bool_t AliITSclusterSSD::IsCrossingWith(Int_t idx){
    // 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	/* $Id$ */
ee86d557	17
4ae5bbc4	18	#include <Riostream.h>
ee86d557	19	#include "TArrayI.h"
ee86d557	20	#include "TClonesArray.h"
e8189707	21	#include "AliITSdigit.h"
b0f5e3fc	22	#include "AliITSclusterSSD.h"
	23
	24	ClassImp(AliITSclusterSSD)
	25
ee86d557	26	//______________________________________________________________________
	27	AliITSclusterSSD::AliITSclusterSSD(){
	28	// default constructor
b0f5e3fc	29
ee86d557	30	fSide = kTRUE;
	31	fDigits = 0;
	32	fNDigits = 0;
	33	fDigitsIndex = 0;
	34	fNCrosses = 0;
	35	fTotalSignal = -1;
	36	fNTracks = -1;
	37	fLeftNeighbour = kFALSE;
	38	fRightNeighbour = kFALSE;
	39	fCrossedClusterIndexes = 0;
	40	fConsumed=kFALSE;
b0f5e3fc	41	}
ee86d557	42	//______________________________________________________________________
	43	AliITSclusterSSD::AliITSclusterSSD(Int_t ndigits, Int_t *DigitIndexes,
	44	TObjArray *Digits, Bool_t side){
	45	// non-default constructor
b0f5e3fc	46
ee86d557	47	fNDigits = ndigits;
	48	fDigits = Digits;
	49	fSide = side;
	50	fDigitsIndex = new TArrayI(fNDigits,DigitIndexes );
	51	fNCrosses = 0;
	52	fCrossedClusterIndexes = new TArrayI(300);
	53	fLeftNeighbour = kFALSE;
	54	fRightNeighbour = kFALSE;
	55	fTotalSignal =-1;
	56	fNTracks = -1;
	57	fConsumed=kFALSE;
b0f5e3fc	58	}
ee86d557	59	//______________________________________________________________________
	60	AliITSclusterSSD::~AliITSclusterSSD(){
	61	// destructor
f239b2fe	62
ee86d557	63	delete fDigitsIndex;
	64	delete fCrossedClusterIndexes;
	65	}
	66	//______________________________________________________________________
	67	AliITSclusterSSD::AliITSclusterSSD(const AliITSclusterSSD &OneSCluster){
	68	// copy constructor
b0f5e3fc	69
ee86d557	70	if (this == &OneSCluster) return;
	71	fNDigits = OneSCluster.fNDigits;
	72	fSide=OneSCluster.fSide;
	73	fDigits=OneSCluster.fDigits;
	74	fDigitsIndex = new TArrayI(fNDigits);
	75	fLeftNeighbour = OneSCluster.fLeftNeighbour;
	76	fRightNeighbour = OneSCluster.fRightNeighbour;
	77	fTotalSignal =-1;
	78	fNTracks = -1;
	79	fNCrosses = OneSCluster.fNCrosses;
	80	fConsumed = OneSCluster.fConsumed;
	81	Int_t i;
	82	for (i = 0; i< fNCrosses ; i++){
	83	fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
	84	}
	85	for (i = 0; i< fNDigits ; i++){
	86	fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
	87	}
	88	return;
	89	}
	90	//______________________________________________________________________
	91	AliITSclusterSSD& AliITSclusterSSD::operator=(const AliITSclusterSSD
	92	&OneSCluster){
	93	// assignment operator
f239b2fe	94
ee86d557	95	if (this == &OneSCluster) return *this;
	96	fNDigits = OneSCluster.fNDigits;
	97	fSide=OneSCluster.fSide;
	98	fDigits=OneSCluster.fDigits;
	99	fDigitsIndex = new TArrayI(fNDigits);
	100	fLeftNeighbour = OneSCluster.fLeftNeighbour;
	101	fRightNeighbour = OneSCluster.fRightNeighbour;
	102	fTotalSignal =-1;
	103	fNTracks = -1;
	104	fNCrosses = OneSCluster.fNCrosses;
	105	fConsumed = OneSCluster.fConsumed;
	106	Int_t i;
	107	for (i = 0; i< fNCrosses ; i++){
	108	fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
	109	}
	110	for (i = 0; i< fNDigits ; i++){
	111	fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
	112	}
	113	return *this;
	114	}
	115	//______________________________________________________________________
	116	Int_t AliITSclusterSSD::SplitCluster(Int_t where, Int_t *outdigits){
	117	//This methods generate data necessery to make new object of this class
	118	//I choosen this way, because methods TClonesArray::Add* dont work
	119	//so I have to use constraction: new (a[i]) Creator(params...);
	120	//where 'a' is a TClonesArray
	121	//This method generate params - see AliITSmoduleSSD::SplitCluster;
	122	Int_t tmp = fNDigits;
	123	Int_t ind = 0;
b0f5e3fc	124
b0f5e3fc	125	outdigits[ind++]=(*fDigitsIndex)[where];
ee86d557	126	//coping border strip (it is shared by this two clusters)
	127	for (Int_t i = (where+1); i < tmp; i++) {
	128	outdigits[ind++]=(*fDigitsIndex)[i];
	129	//"moving" strips from this to the new one
	130	(*fDigitsIndex)[i]=-1;
	131	fNDigits--; //deleting strips from this cluster
	132	}
	133	return ind;
b0f5e3fc	134	}
ee86d557	135	//______________________________________________________________________
	136	Int_t AliITSclusterSSD::GetDigitStripNo(Int_t digit){
	137	// return strip no of a digit
	138	if (digit<0) return -1;
	139	return (digit>(fNDigits-1)) ? -1 :
	140	((AliITSdigitSSD)(fDigits->At((fDigitsIndex)[digit])))->GetStripNumber();
b0f5e3fc	141	}
ee86d557	142	//______________________________________________________________________
	143	Int_t AliITSclusterSSD::GetDigitSignal(Int_t digit){
	144	// returns digit signal
	145	Int_t index,signal;
	146	if (digit<0\|\|digit>=fNDigits) return -1;
	147	index = (*fDigitsIndex)[digit];
	148	signal = ((AliITSdigitSSD*)(fDigits->At(index)))->GetSignal();
	149	/*
	150	if(signal>1.e5) printf("GetDigitSignal: digit %d index %d signal %d\n",
	151	digit,index, signal);
	152	*/
	153	return signal;
b0f5e3fc	154	}
ee86d557	155	//______________________________________________________________________
	156	void AliITSclusterSSD::AddCross(Int_t clIndex){
	157	// add cluster cross to list of cluster crosses
766ef0c8	158
ee86d557	159	(*fCrossedClusterIndexes)[fNCrosses++] = clIndex;
b0f5e3fc	160	}
ee86d557	161	//______________________________________________________________________
	162	Int_t AliITSclusterSSD::GetCross(Int_t crIndex){
	163	// return crossing cluster
b0f5e3fc	164
ee86d557	165	return ((crIndex>-1)&&(crIndex<fNCrosses))?(*fCrossedClusterIndexes)[crIndex]:-1;
b0f5e3fc	166	}
ee86d557	167	//______________________________________________________________________
	168	Double_t AliITSclusterSSD::CentrOfGravity(){
	169	// return center of gravity of the cluster
	170	Float_t ret=0;
b0f5e3fc	171
ee86d557	172	if (fLeftNeighbour) ret+=(GetDigitStripNo(0)0.5GetDigitSignal(0));
	173	else ret+=(GetDigitStripNo(0)*GetDigitSignal(0));
	174	if (fRightNeighbour) ret+=(GetDigitStripNo(fNDigits -1)0.5GetDigitSignal(fNDigits -1));
	175	else ret+=(GetDigitStripNo(fNDigits -1)*GetDigitSignal(fNDigits-1));
	176	for (Int_t i=1;i<fNDigits-1;i++){
	177	ret +=GetDigitStripNo(i)*GetDigitSignal(i);
	178	}// end for i
b0f5e3fc	179
ee86d557	180	if (fTotalSignal<0) GetTotalSignal();
b0f5e3fc	181
	182	return (ret/fTotalSignal);
	183	}
ee86d557	184	//______________________________________________________________________
	185	Float_t AliITSclusterSSD::GetTotalSignal(){
	186	// return total signal
766ef0c8	187
ee86d557	188	if(fTotalSignal <0){
	189	fTotalSignal=0;
	190	if (fNDigits ==1) {
	191	fTotalSignal = (Float_t)GetDigitSignal(0);
	192	//printf("1 digit: signal %d \n",GetDigitSignal(0));
	193	return fTotalSignal;
	194	}
	195	if (fLeftNeighbour) fTotalSignal += (Float_t)(0.5*GetDigitSignal(0));
	196	else fTotalSignal += (Float_t) GetDigitSignal(0);
	197	//printf("GetTotalSignal :i DigitSignal %d %d \n",0,GetDigitSignal(0));
	198	if (fRightNeighbour) fTotalSignal += (Float_t)(0.5*GetDigitSignal(
	199	fNDigits -1));
b0f5e3fc	200	else fTotalSignal += (Float_t)GetDigitSignal(fNDigits-1);
ee86d557	201	//printf("GetTotalSignal :i DigitSignal %d %d \n",fNDigits -1,GetDigitSignal(fNDigits -1));
	202	for (Int_t i = 1;i<fNDigits -1;i++){
	203	fTotalSignal += (Float_t)GetDigitSignal(i);
	204	//printf("GetTotalSignal :i DigitSignal %d %d \n",i,GetDigitSignal(i));
b0f5e3fc	205	}
ee86d557	206	//printf("GetTotalSignal: fNDigits %d fTotalSignal %.0f \n",fNDigits,fTotalSignal);
b0f5e3fc	207	}
ee86d557	208	return fTotalSignal;
b0f5e3fc	209	}
ee86d557	210	//______________________________________________________________________
	211	Float_t AliITSclusterSSD::GetTotalSignalError(){
	212	// return the error on the signal
	213	Float_t err =0;
	214	for (Int_t i =1; i<fNDigits -1; i++){
	215	err+=0.1*GetDigitSignal(i);
b0f5e3fc	216	}
ee86d557	217	if (GetLeftNeighbour()){
	218	err+=GetDigitSignal(0);
	219	}else{
	220	err+=0.1*GetDigitSignal(0);
	221	}
	222	if (GetRightNeighbour()){
	223	err+=GetDigitSignal(fNDigits -1);
	224	}else{
	225	err+=0.1*GetDigitSignal(fNDigits -1);
	226	}
	227	return err;
b0f5e3fc	228	}
ee86d557	229	//______________________________________________________________________
	230	void AliITSclusterSSD::DelCross(Int_t index){
	231	// remove cross clusters from the list of cross clusters
	232	Int_t i,j; //iterators
b0f5e3fc	233
ee86d557	234	for (i =0;i<fNCrosses;i++){
	235	if ((*fCrossedClusterIndexes)[i] == index){
	236	for (j=i;j<fNCrosses-1;j++){
	237	(fCrossedClusterIndexes)[j]=(fCrossedClusterIndexes)[j+1];
	238	}
	239	fNCrosses--;
	240	return;
	241	}
	242	}
b0f5e3fc	243	}
ee86d557	244	//______________________________________________________________________
	245	Int_t *AliITSclusterSSD::GetTracks(Int_t &nt){
	246	// return the track number of the cluster
f8d9a5b8	247	Int_t ntrk = GetDigit(0)->GetNTracks();
	248	Int_t ndig = GetNumOfDigits();
	249	Int_t *idig = new Int_t[ndig];
	250	Int_t *sdig = new Int_t[ndig];
	251	Int_t itrk = new Int_t[ndigntrk];
	252	Int_t i,j,k,l,trk;
	253	Bool_t b;
	254
	255	for(i=0;i<ndig;i++){idig[i] = i;sdig[i] = GetDigit(i)->GetSignal();}
	256	TMath::Sort(ndig,sdig,idig,kTRUE);
	257	for(i=0;i<ndig*ntrk;i++) itrk[i] = -3;
	258	j = k = l = 0;
	259	for(i=0;i<ndig;i++){ // fill itrk with track numbers in order of digit size
	260	j = idig[i];
	261	for(k=0;k<ntrk;k++) if((trk = GetDigit(j)->GetTrack(k))>=0) {
	262	itrk[l] = trk;
	263	l++;
	264	} // end for k/if
	265	} // end for i
	266	for(i=0;i<10;i++) fTrack[i] = -3;
	267	fTrack[0] = itrk[0]; // first element
	268	k = 1;
	269	b = kTRUE;
	270	for(i=1;i<l;i++){
	271	for(j=0;j<k;j++) if(fTrack[j]==itrk[i]) b = kFALSE;
	272	if(b){fTrack[k] = itrk[i]; k++;}
	273	if(k>9) break;
	274	} // end for i
	275	nt = k;
	276
	277	delete[] idig;
	278	delete[] sdig;
	279	delete[] itrk;
	280
	281	return fTrack;
	282	/*
ee86d557	283	Int_t *tidx=0;
	284	Int_t i, j,n;
	285	Int_t bit =0;
	286	Int_t ntracks=0;
	287	nt=0;
b0f5e3fc	288
ee86d557	289	for (i=0;i<10;i++) fTrack[i] = -3;
b0f5e3fc	290
ee86d557	291	//cout<<"GetTrack start -------: fNDigits ="<<fNDigits<<endl;
b0f5e3fc	292
ee86d557	293	for (i = 0; i<fNDigits; i++) {
	294	tidx = GetDigit(i)->GetTracks();
	295	n = GetDigit(i)->GetNTracks();
	296	for (j = 0; j<n && j<10;j++) {
	297	if (tidx[j] >= 0) {
	298	if(ntracks == 0){
	299	fTrack[ntracks] = tidx[j];
	300	ntracks++;
	301	}else if(tidx[j] != fTrack[ntracks-1]){
	302	ntracks++;
	303	if(ntracks > 9) {
	304	bit = 1;
	305	break;
	306	} // end if ntracks > 9
	307	fTrack[ntracks-1] = tidx[j];
	308	} // end if ntracke == 0
	309	} // end if tidx[j] >=0
	310	} // 3-tracks loop for the digit
	311	if(bit == 1) break;
	312	} // digit loop
f239b2fe	313
ee86d557	314	SetNTracks(ntracks);
	315	nt = ntracks;
	316	return &(fTrack[0]);
f8d9a5b8	317	*/
b0f5e3fc	318	}
ee86d557	319	//______________________________________________________________________
	320	Double_t AliITSclusterSSD::GetPosition(){
	321	// return position of the cluster
	322	Float_t ret;
b0f5e3fc	323
ee86d557	324	switch(fNDigits){
	325	case 1:
	326	ret = GetDigitStripNo(0);
	327	break;
	328	case 2:
	329	ret = EtaAlgorithm();
	330	break;
	331	default:
	332	ret = CentrOfGravity();
	333	}
	334	return ret;
b0f5e3fc	335	}
ee86d557	336	//______________________________________________________________________
	337	Double_t AliITSclusterSSD::EtaAlgorithm(){
	338	// algorithm for determing cluster position
	339	if (fNDigits != 2) return -1;
b0f5e3fc	340
ee86d557	341	Int_t strip1 = GetDigit(0)->GetStripNumber();
	342	Int_t strip2 = GetDigit(1)->GetStripNumber();
	343	Int_t signal1 = GetDigit(0)->GetSignal();
	344	Int_t signal2 = GetDigit(1)->GetSignal();
b0f5e3fc	345
ee86d557	346	Double_t eta;
b0f5e3fc	347
b0f5e3fc	348
ee86d557	349	if (strip1<strip2){
	350	eta = ((Double_t)signal2)/((Double_t)(signal1+signal2));
	351	if (eta<0.04) return strip1;
	352	if (eta>0.96) return strip2;
	353	return (strip1 + 0.43478261*eta + 0.2826087);
	354	} else{
	355	eta = ((Double_t)signal1)/((Double_t)(signal1+signal2));
	356	if (eta<0.04) return strip2;
	357	if (eta>0.96) return strip1;
	358	return (strip2 + 0.43478261*eta + 0.2826087);
	359	}
b0f5e3fc	360	}
ee86d557	361	//______________________________________________________________________
	362	Double_t AliITSclusterSSD::GetPositionError(){
	363	// return the position error
	364	return (GetNumOfDigits()+1)/2;
b0f5e3fc	365	}
ee86d557	366	//______________________________________________________________________
	367	Bool_t AliITSclusterSSD::IsCrossingWith(Int_t idx){
	368	// return the cluster to which he crosses
b0f5e3fc	369
ee86d557	370	for (Int_t i =0; i< fNCrosses;i++){
	371	if (GetCross(i) == idx) return kTRUE;
	372	}
	373	return kFALSE;
b0f5e3fc	374	}