1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 #include <Riostream.h>
20 #include "TClonesArray.h"
21 #include "AliITSdigit.h"
22 #include "AliITSclusterSSD.h"
24 ClassImp(AliITSclusterSSD)
26 //______________________________________________________________________
27 AliITSclusterSSD::AliITSclusterSSD(){
28 // default constructor
37 fLeftNeighbour = kFALSE;
38 fRightNeighbour = kFALSE;
39 fCrossedClusterIndexes = 0;
42 //______________________________________________________________________
43 AliITSclusterSSD::AliITSclusterSSD(Int_t ndigits, Int_t *DigitIndexes,
44 TObjArray *Digits, Bool_t side){
45 // non-default constructor
50 fDigitsIndex = new TArrayI(fNDigits,DigitIndexes );
52 fCrossedClusterIndexes = new TArrayI(300);
53 fLeftNeighbour = kFALSE;
54 fRightNeighbour = kFALSE;
59 //______________________________________________________________________
60 AliITSclusterSSD::~AliITSclusterSSD(){
64 delete fCrossedClusterIndexes;
66 //______________________________________________________________________
67 AliITSclusterSSD::AliITSclusterSSD(const AliITSclusterSSD &OneSCluster){
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;
79 fNCrosses = OneSCluster.fNCrosses;
80 fConsumed = OneSCluster.fConsumed;
82 for (i = 0; i< fNCrosses ; i++){
83 fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
85 for (i = 0; i< fNDigits ; i++){
86 fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
90 //______________________________________________________________________
91 AliITSclusterSSD& AliITSclusterSSD::operator=(const AliITSclusterSSD
93 // assignment operator
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;
104 fNCrosses = OneSCluster.fNCrosses;
105 fConsumed = OneSCluster.fConsumed;
107 for (i = 0; i< fNCrosses ; i++){
108 fCrossedClusterIndexes[i] = OneSCluster.fCrossedClusterIndexes[i];
110 for (i = 0; i< fNDigits ; i++){
111 fDigitsIndex[i]=OneSCluster.fDigitsIndex[i];
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;
125 outdigits[ind++]=(*fDigitsIndex)[where];
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
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();
142 //______________________________________________________________________
143 Int_t AliITSclusterSSD::GetDigitSignal(Int_t digit){
144 // returns digit signal
146 if (digit<0||digit>=fNDigits) return -1;
147 index = (*fDigitsIndex)[digit];
148 signal = ((AliITSdigitSSD*)(fDigits->At(index)))->GetSignal();
150 if(signal>1.e5) printf("GetDigitSignal: digit %d index %d signal %d\n",
151 digit,index, signal);
155 //______________________________________________________________________
156 void AliITSclusterSSD::AddCross(Int_t clIndex){
157 // add cluster cross to list of cluster crosses
159 (*fCrossedClusterIndexes)[fNCrosses++] = clIndex;
161 //______________________________________________________________________
162 Int_t AliITSclusterSSD::GetCross(Int_t crIndex){
163 // return crossing cluster
165 return ((crIndex>-1)&&(crIndex<fNCrosses))?(*fCrossedClusterIndexes)[crIndex]:-1;
167 //______________________________________________________________________
168 Double_t AliITSclusterSSD::CentrOfGravity(){
169 // return center of gravity of the cluster
172 if (fLeftNeighbour) ret+=(GetDigitStripNo(0)*0.5*GetDigitSignal(0));
173 else ret+=(GetDigitStripNo(0)*GetDigitSignal(0));
174 if (fRightNeighbour) ret+=(GetDigitStripNo(fNDigits -1)*0.5*GetDigitSignal(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);
180 if (fTotalSignal<0) GetTotalSignal();
182 return (ret/fTotalSignal);
184 //______________________________________________________________________
185 Float_t AliITSclusterSSD::GetTotalSignal(){
186 // return total signal
191 fTotalSignal = (Float_t)GetDigitSignal(0);
192 //printf("1 digit: signal %d \n",GetDigitSignal(0));
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(
200 else fTotalSignal += (Float_t)GetDigitSignal(fNDigits-1);
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));
206 //printf("GetTotalSignal: fNDigits %d fTotalSignal %.0f \n",fNDigits,fTotalSignal);
210 //______________________________________________________________________
211 Float_t AliITSclusterSSD::GetTotalSignalError(){
212 // return the error on the signal
214 for (Int_t i =1; i<fNDigits -1; i++){
215 err+=0.1*GetDigitSignal(i);
217 if (GetLeftNeighbour()){
218 err+=GetDigitSignal(0);
220 err+=0.1*GetDigitSignal(0);
222 if (GetRightNeighbour()){
223 err+=GetDigitSignal(fNDigits -1);
225 err+=0.1*GetDigitSignal(fNDigits -1);
229 //______________________________________________________________________
230 void AliITSclusterSSD::DelCross(Int_t index){
231 // remove cross clusters from the list of cross clusters
232 Int_t i,j; //iterators
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];
244 //______________________________________________________________________
245 Int_t *AliITSclusterSSD::GetTracks(Int_t &nt){
246 // return the track number of the cluster
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[ndig*ntrk];
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;
259 for(i=0;i<ndig;i++){ // fill itrk with track numbers in order of digit size
261 for(k=0;k<ntrk;k++) if((trk = GetDigit(j)->GetTrack(k))>=0) {
266 for(i=0;i<10;i++) fTrack[i] = -3;
267 fTrack[0] = itrk[0]; // first element
271 for(j=0;j<k;j++) if(fTrack[j]==itrk[i]) b = kFALSE;
272 if(b){fTrack[k] = itrk[i]; k++;}
289 for (i=0;i<10;i++) fTrack[i] = -3;
291 //cout<<"GetTrack start -------: fNDigits ="<<fNDigits<<endl;
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++) {
299 fTrack[ntracks] = tidx[j];
301 }else if(tidx[j] != fTrack[ntracks-1]){
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
319 //______________________________________________________________________
320 Double_t AliITSclusterSSD::GetPosition(){
321 // return position of the cluster
326 ret = GetDigitStripNo(0);
329 ret = EtaAlgorithm();
332 ret = CentrOfGravity();
336 //______________________________________________________________________
337 Double_t AliITSclusterSSD::EtaAlgorithm(){
338 // algorithm for determing cluster position
339 if (fNDigits != 2) return -1;
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();
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);
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);
361 //______________________________________________________________________
362 Double_t AliITSclusterSSD::GetPositionError(){
363 // return the position error
364 return (GetNumOfDigits()+1)/2;
366 //______________________________________________________________________
367 Bool_t AliITSclusterSSD::IsCrossingWith(Int_t idx){
368 // return the cluster to which he crosses
370 for (Int_t i =0; i< fNCrosses;i++){
371 if (GetCross(i) == idx) return kTRUE;