1 /**************************************************************************
2 * Copyright(c) 1998-2003, 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 **************************************************************************/
16 //////////////////////////////////////////////////////////////////////////
17 // Class used to simplify some operations with clusters. //
18 // -Function FillArray fills an array wich contains, for each //
19 // ITS module, an array with the indices of all the clusters detected //
20 // by the module. The indices correspond to the cluster indices in class//
21 // AliITSlayer of AliITStrackerV2. //
22 // This function is used in AliITStrackerSA::FindTracks. //
23 // -Function FillArrayLabel fills an array wich contains, for each //
24 // particle label, and for each layer, the information on clusters: //
25 // 0 if there is no cluster, 1 if there is a cluster with this label. //
26 // This function is used to define trackable tracks. //
27 // -Function FillArrayCoorAngles fills arrays wich contains, for each //
28 // layer, the global coordinates, errors on x,y,z and angles lambda //
29 // and phi for each cluster //
30 ///////////////////////////////////////////////////////////////////////////
33 #include "AliITSclusterTable.h"
34 #include "AliITSclusterV2.h"
35 #include "AliITSgeom.h"
36 #include "AliITStrackerSA.h"
38 #include<TClonesArray.h>
40 ClassImp(AliITSclusterTable)
42 //__________________________________________________________
43 AliITSclusterTable::AliITSclusterTable(){
44 // Default constructor
58 for(Int_t i=0;i<3;i++){fPrimaryVertex[i]=0;}
61 //__________________________________________________________
62 AliITSclusterTable::AliITSclusterTable(AliITSgeom* geom, AliITStrackerSA* tracker,Double_t* primaryVertex) {
63 // Standard constructor
65 Int_t nm = geom->GetIndexMax();
67 for(Int_t i=0;i<nm;i++){fNCl[i]=0;}
71 for(Int_t i=0;i<3;i++){fPrimaryVertex[i]=primaryVertex[i];}
82 //______________________________________________________________________
83 AliITSclusterTable::AliITSclusterTable(const AliITSclusterTable &tab) :
86 // Copies are not allowed. The method is protected to avoid misuse.
87 Error("AliITSclusterTable","Copy constructor not allowed\n");
90 //______________________________________________________________________
91 AliITSclusterTable& AliITSclusterTable::operator=(const
92 AliITSclusterTable& /* tab */){
93 // Assignment operator
94 // Assignment is not allowed. The method is protected to avoid misuse.
95 Error("= operator","Assignment operator not allowed\n");
99 //__________________________________________________________
100 AliITSclusterTable::~AliITSclusterTable(){
102 Int_t nm = fGeom->GetIndexMax();
104 for (Int_t i=0; i<nm; i++){
109 if (fLbl)delete [] fLbl; // memory leak!
110 if (fNCl)delete [] fNCl;
111 for (Int_t i = 0; i < fGeom->GetNlayers(); i++) {
112 if (fPhiList) delete fPhiList[i];
113 if (fLambdaList) delete fLambdaList[i];
114 if (fXList) delete fXList[i];
115 if (fYList) delete fYList[i];
116 if (fZList) delete fZList[i];
117 if (fSxList) delete fSxList[i];
118 if (fSyList) delete fSyList[i];
119 if (fSzList) delete fSzList[i];
121 if (fPhiList) delete[] fPhiList;
122 if (fLambdaList) delete[] fLambdaList;
123 if (fXList) delete[] fXList;
124 if (fYList) delete[] fYList;
125 if (fZList) delete[] fZList;
126 if (fSxList) delete[] fSxList;
127 if (fSyList) delete[] fSyList;
128 if (fSzList) delete[] fSzList;
131 //__________________________________________________________
133 void AliITSclusterTable::FillArray(TTree* clusterTree){
136 Int_t nm = fGeom->GetIndexMax();
137 fDet = new TArrayI*[nm];
139 TArrayI** vect = new TArrayI*[fGeom->GetNlayers()];
141 Int_t * firstmod = new Int_t[fGeom->GetNlayers()+1];
142 firstmod[fGeom->GetNlayers()]=fGeom->GetIndexMax(); // upper limit
143 for(Int_t nlayer=0;nlayer<fGeom->GetNlayers();nlayer++){
144 firstmod[nlayer] = fGeom->GetModuleIndex(nlayer+1,1,1);
145 Int_t ncl = fTracker->GetNumberOfClustersLayer(nlayer);
146 vect[nlayer]=new TArrayI(ncl);
147 for(Int_t j=0;j<ncl;j++){
148 AliITSclusterV2* cl = fTracker->GetClusterLayer(nlayer,j);
149 vect[nlayer]->AddAt(cl->GetDetectorIndex()+firstmod[nlayer],j);
153 TBranch *brancht=(TBranch*)clusterTree->GetBranch("Clusters");
154 if(!brancht) Warning("FillArray","No cluster branch");
155 TClonesArray* clus = new TClonesArray("AliITSclusterV2",10000);
156 brancht->SetAddress(&clus);
159 for(Int_t mod=0;mod<nm;mod++){
161 clusterTree->GetEvent(mod);
162 Int_t ncl = clus->GetEntries();
163 fDet[mod] = new TArrayI(ncl);
165 Int_t nlr = FindIndex(fGeom->GetNlayers(),firstmod,mod);
167 Fatal("FillArray","Wrong module number %d . Limits: %d , %d",mod,firstmod[0],firstmod[fGeom->GetNlayers()+1]);
171 for(Int_t n=0;n<vect[nlr]->GetSize();n++){
172 Int_t mm=vect[nlr]->At(n);
173 if(mm==mod) {fDet[mod]->AddAt(n,nc); nc+=1; }
181 for(Int_t n=0;n<fGeom->GetNlayers();n++)delete vect[n];
186 //_________________________________________________________________
187 void AliITSclusterTable::FillArrayLabel(Int_t numberofparticles){
191 fLbl = new TArrayI*[numberofparticles];
192 const Int_t knm =fGeom->GetNlayers();
193 for(Int_t nlab=0;nlab<numberofparticles;nlab++){
194 fLbl[nlab] = new TArrayI(knm);
195 Int_t * nn = new Int_t[knm];
196 for(Int_t i=0;i<knm;i++)nn[i]=0;
197 for(Int_t nlayer=0;nlayer<knm;nlayer++){
198 Int_t ncl = fTracker->GetNumberOfClustersLayer(nlayer);
200 AliITSclusterV2* cl = fTracker->GetClusterLayer(nlayer,ncl);
201 if(cl->IsUsed()==1) continue;
202 if(cl->GetLabel(0)==nlab || cl->GetLabel(1)==nlab || cl->GetLabel(2)==nlab){
208 fLbl[nlab]->AddAt(nn[nlayer],nlayer);
215 //_______________________________________________________________
216 Int_t AliITSclusterTable::ThisParticleIsTrackable(Int_t label,Int_t numberofpoints){
218 //Returns 1 if particle with label "label" is trackable.
221 for(Int_t i=0;i<fGeom->GetNlayers();i++){
222 Int_t ncl = fLbl[label]->At(i);
225 if(nb>=numberofpoints) return 1;
230 //_______________________________________________________________
231 Int_t AliITSclusterTable::FindIndex(Int_t ndim, Int_t *ptr, Int_t value){
232 // ptr[ndim+1] is an array of integers
233 // ndim is its dimension minus 1
234 // value is a number such as: ptr[0]<=value < ptr[ndim]
235 // if ptr[i]<=value<ptr[i+1] the index i is returned; -1 if out of bounds
237 for(Int_t k=0;k<ndim;k++){
238 if(value>=ptr[k] && value <ptr[k+1]){
246 void AliITSclusterTable::FillArrayCoorAngles(){
247 //Fill arrays with phi,lambda and indices of clusters for each layer
248 Info("FillArrayCoorAngles","Filling Array...");
250 fPhiList = new TArrayD*[fGeom->GetNlayers()];
251 fLambdaList = new TArrayD*[fGeom->GetNlayers()];
252 fXList = new TArrayD*[fGeom->GetNlayers()];
253 fYList = new TArrayD*[fGeom->GetNlayers()];
254 fZList = new TArrayD*[fGeom->GetNlayers()];
255 fSxList = new TArrayD*[fGeom->GetNlayers()];
256 fSyList = new TArrayD*[fGeom->GetNlayers()];
257 fSzList = new TArrayD*[fGeom->GetNlayers()];
259 Int_t * firstmod = new Int_t[fGeom->GetNlayers()+1];
260 firstmod[fGeom->GetNlayers()]=fGeom->GetIndexMax(); // upper limit
262 for(Int_t nlay=0;nlay<fGeom->GetNlayers();nlay++){
263 firstmod[nlay] = fGeom->GetModuleIndex(nlay+1,1,1);
264 Int_t ncl = fTracker->GetNumberOfClustersLayer(nlay);
265 fPhiList[nlay] = new TArrayD(ncl);
266 fLambdaList[nlay]=new TArrayD(ncl);
267 fXList[nlay]=new TArrayD(ncl);
268 fYList[nlay]=new TArrayD(ncl);
269 fZList[nlay]=new TArrayD(ncl);
270 fSxList[nlay]=new TArrayD(ncl);
271 fSyList[nlay]=new TArrayD(ncl);
272 fSzList[nlay]=new TArrayD(ncl);
274 for(Int_t j=0;j<ncl;j++){
275 AliITSclusterV2* cl = fTracker->GetClusterLayer(nlay,j);
276 Double_t phi=0;Double_t lambda=0;
277 Double_t x=0;Double_t y=0;Double_t z=0;
278 Double_t sx=0;Double_t sy=0;Double_t sz=0;
279 Int_t module = cl->GetDetectorIndex()+firstmod[nlay];
280 GetCoorAngles(cl,module,phi,lambda,x,y,z);
281 GetCoorErrors(cl,module,sx,sy,sz);
282 fPhiList[nlay]->AddAt(phi,j);
283 fLambdaList[nlay]->AddAt(lambda,j);
284 fXList[nlay]->AddAt(x,j);
285 fYList[nlay]->AddAt(y,j);
286 fZList[nlay]->AddAt(z,j);
287 fSxList[nlay]->AddAt(sx,j);
288 fSyList[nlay]->AddAt(sy,j);
289 fSzList[nlay]->AddAt(sz,j);
298 void AliITSclusterTable::GetCoorAngles(AliITSclusterV2* cl,Int_t module,Double_t &phi,Double_t &lambda, Double_t &x, Double_t &y,Double_t &z){
299 //Returns values of phi (azimuthal) and lambda angles for a given cluster
301 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
302 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
303 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
305 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
306 Double_t phi1=TMath::Pi()/2+alpha;
307 if (lay==1) phi1+=TMath::Pi();
309 Double_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
310 Double_t r=tx*cp+ty*sp;
312 x= r*cp - cl->GetY()*sp;
313 y= r*sp + cl->GetY()*cp;
316 phi=TMath::ATan2(y,x);
317 lambda=TMath::ATan2(z-fPrimaryVertex[2],TMath::Sqrt((x-fPrimaryVertex[0])*(x-fPrimaryVertex[0])+(y-fPrimaryVertex[1])*(y-fPrimaryVertex[1])));
320 void AliITSclusterTable::GetCoorErrors(AliITSclusterV2* cl, Int_t module,Double_t &sx,Double_t &sy, Double_t &sz){
322 //returns x,y,z of cluster in global coordinates
324 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
325 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
327 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
328 Double_t phi=TMath::Pi()/2+alpha;
329 if (lay==1) phi+=TMath::Pi();
331 Double_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
334 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
335 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
336 sz = TMath::Sqrt(cl->GetSigmaZ2());