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04e92dc8 | 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 | /* $Id$ */ | |
16 | ||
17 | /* History of cvs commits: | |
18 | * | |
19 | * $Log$ | |
9a2cdbdf | 20 | * Revision 1.7 2007/08/07 14:12:03 kharlov |
21 | * Quality assurance added (Yves Schutz) | |
22 | * | |
ddd1a39c | 23 | * Revision 1.6 2007/08/03 14:41:37 cvetan |
24 | * Missing header files | |
25 | * | |
1d0c181d | 26 | * Revision 1.5 2007/08/03 13:52:16 kharlov |
27 | * Working skeleton of matching the ESD tracks and ESD clusters (Iouri Belikov) | |
28 | * | |
04e92dc8 | 29 | */ |
30 | ||
31 | #include <TClonesArray.h> | |
1d0c181d | 32 | #include <TMath.h> |
04e92dc8 | 33 | |
34 | #include <AliLog.h> | |
23904d16 | 35 | #include "AliPHOSTracker.h" |
04e92dc8 | 36 | #include "AliPHOSEmcRecPoint.h" |
af885e0f | 37 | #include "AliESDEvent.h" |
ddd1a39c | 38 | #include "AliPHOSQualAssDataMaker.h" |
39 | #include "AliPHOSGetter.h" | |
1d0c181d | 40 | #include "AliESDtrack.h" |
ddd1a39c | 41 | #include "AliPHOSTrackSegmentMakerv1.h" |
42 | #include "AliPHOSPIDv1.h" | |
23904d16 | 43 | |
44 | //------------------------------------------------------------------------- | |
45 | // PHOS tracker. | |
46 | // Matches ESD tracks with the PHOS and makes the PID. | |
04e92dc8 | 47 | // |
23904d16 | 48 | //------------------------------------------------------------------------- |
49 | ||
50 | ClassImp(AliPHOSTracker) | |
51 | ||
04e92dc8 | 52 | Bool_t AliPHOSTracker::fgDebug = kFALSE ; |
53 | ||
54 | ||
55 | // ***** Some geometrical constants (used in PropagateBack) | |
56 | ||
57 | const Double_t kR=460.+ 9; // Radial coord. of the centre of EMC module (cm) | |
58 | ||
59 | const Double_t kAlpha=20.*TMath::Pi()/180.; // Segmentation angle (rad) | |
60 | const Double_t kYmax=kR*TMath::Tan(0.5*kAlpha); // Maximal possible y-coord.(cm) | |
61 | const Double_t kZmax=65.; // Approximately: the maximal possible z-coord.(cm) | |
62 | ||
63 | ||
64 | ||
ddd1a39c | 65 | //____________________________________________________________________________ |
66 | AliPHOSTracker::AliPHOSTracker(): | |
9a2cdbdf | 67 | AliTracker() |
ddd1a39c | 68 | { |
04e92dc8 | 69 | //-------------------------------------------------------------------- |
70 | // The default constructor | |
71 | //-------------------------------------------------------------------- | |
72 | for (Int_t i=0; i<5; i++) | |
73 | fModules[i]=new TClonesArray("AliPHOSEmcRecPoint",777); | |
74 | } | |
75 | ||
ddd1a39c | 76 | //____________________________________________________________________________ |
77 | AliPHOSTracker::~AliPHOSTracker() | |
78 | { | |
04e92dc8 | 79 | //-------------------------------------------------------------------- |
80 | // The destructor | |
81 | //-------------------------------------------------------------------- | |
82 | for (Int_t i=0; i<5; i++) { | |
83 | (fModules[i])->Delete(); | |
84 | delete fModules[i]; | |
85 | } | |
86 | } | |
87 | ||
ddd1a39c | 88 | //____________________________________________________________________________ |
04e92dc8 | 89 | Int_t AliPHOSTracker::LoadClusters(TTree *cTree) { |
90 | //-------------------------------------------------------------------- | |
91 | // This function loads the PHOS clusters | |
92 | //-------------------------------------------------------------------- | |
93 | TObjArray *arr=NULL; | |
94 | TBranch *branch=cTree->GetBranch("PHOSEmcRP"); | |
95 | if (branch==0) { | |
96 | AliError("No branch with the EMC clusters found !"); | |
97 | return 1; | |
98 | } | |
99 | branch->SetAddress(&arr); | |
100 | ||
101 | Int_t nclusters=0; | |
102 | Int_t nentr=(Int_t)branch->GetEntries(); | |
103 | for (Int_t i=0; i<nentr; i++) { | |
104 | if (!branch->GetEvent(i)) continue; | |
105 | Int_t ncl=arr->GetEntriesFast(); | |
106 | while (ncl--) { | |
107 | AliPHOSEmcRecPoint *cl=(AliPHOSEmcRecPoint*)arr->UncheckedAt(ncl); | |
108 | ||
109 | Int_t m=cl->GetPHOSMod(); | |
110 | if ((m<1)||(m>5)) { | |
111 | AliError("Wrong module index !"); | |
112 | return 1; | |
113 | } | |
114 | ||
115 | // Here is how the alignment is treated | |
116 | if (!cl->Misalign()) AliWarning("Can't misalign this cluster !"); | |
117 | ||
118 | cl->SetBit(14,kFALSE); // The clusters are not yet attached to any track | |
119 | ||
120 | TClonesArray &module=*fModules[m-1]; | |
121 | Int_t idx=module.GetEntriesFast(); | |
122 | new (module[idx]) AliPHOSEmcRecPoint(*cl); | |
123 | ||
124 | nclusters++; | |
125 | ||
126 | } | |
127 | } | |
128 | ||
129 | Info("LoadClusters","Number of loaded clusters: %d",nclusters); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
ddd1a39c | 134 | //____________________________________________________________________________ |
af885e0f | 135 | Int_t AliPHOSTracker::PropagateBack(AliESDEvent *esd) { |
04e92dc8 | 136 | //-------------------------------------------------------------------- |
23904d16 | 137 | // Called by AliReconstruction |
04e92dc8 | 138 | // Performs the track matching with the PHOS modules |
139 | // Makes the PID | |
140 | //-------------------------------------------------------------------- | |
141 | ||
04e92dc8 | 142 | Int_t nt=esd->GetNumberOfTracks(); |
143 | ||
144 | // *** Select and sort the ESD track in accordance with their quality | |
145 | Double_t *quality=new Double_t[nt]; | |
146 | Int_t *index=new Int_t[nt]; | |
147 | for (Int_t i=0; i<nt; i++) { | |
148 | AliESDtrack *esdTrack=esd->GetTrack(i); | |
149 | quality[i] = esdTrack->GetSigmaY2() + esdTrack->GetSigmaZ2(); | |
150 | } | |
151 | TMath::Sort(nt,quality,index,kFALSE); | |
152 | ||
153 | ||
154 | // *** Start the matching | |
155 | Double_t bz=GetBz(); | |
156 | Int_t matched=0; | |
157 | for (Int_t i=0; i<nt; i++) { | |
158 | AliESDtrack *esdTrack=esd->GetTrack(index[i]); | |
159 | ||
160 | // Skip the tracks having "wrong" status (has to be checked/tuned) | |
161 | ULong_t status = esdTrack->GetStatus(); | |
162 | if ((status & AliESDtrack::kTRDout) == 0) continue; | |
163 | if ((status & AliESDtrack::kTRDrefit) == 1) continue; | |
164 | ||
165 | AliExternalTrackParam t(*esdTrack); | |
166 | ||
167 | Int_t isec=Int_t(t.GetAlpha()/kAlpha); | |
168 | Int_t imod=-isec-2; // PHOS module | |
169 | ||
170 | Double_t y; // Some tracks do not reach the PHOS | |
171 | if (!t.GetYAt(kR,bz,y)) continue; // because of the bending | |
172 | ||
173 | Double_t z; t.GetZAt(kR,bz,z); | |
174 | if (TMath::Abs(z) > kZmax) continue; // Some tracks miss the PHOS in Z | |
175 | ||
176 | Bool_t ok=kTRUE; | |
177 | while (TMath::Abs(y) > kYmax) { // Find the matching module | |
178 | Double_t alp=t.GetAlpha(); | |
179 | if (y > kYmax) { | |
180 | if (!t.Rotate(alp+kAlpha)) {ok=kFALSE; break;} | |
181 | imod--; | |
182 | } else if (y < -kYmax) { | |
183 | if (!t.Rotate(alp-kAlpha)) {ok=kFALSE; break;} | |
184 | imod++; | |
185 | } | |
186 | if (!t.GetYAt(kR,bz,y)) {ok=kFALSE; break;} | |
187 | } | |
188 | if (!ok) continue; // Track rotation failed | |
189 | ||
190 | ||
191 | if ((imod<0)||(imod>4)) continue; // Some tracks miss the PHOS in azimuth | |
192 | ||
193 | //t.CorrectForMaterial(...); // Correct for the TOF material, if needed | |
194 | t.PropagateTo(kR,bz); // Propagate to the matching module | |
195 | ||
196 | ||
197 | // *** Search for the "best" cluster (can be improved) | |
198 | TClonesArray &cArray=*fModules[imod]; | |
199 | Int_t ncl=cArray.GetEntriesFast(); | |
200 | AliPHOSEmcRecPoint *bestCluster=0; // The "best" cluster | |
201 | Double_t maxd2=400; // (cm^2) | |
202 | for (Int_t i=0; i<ncl; i++) { | |
203 | AliPHOSEmcRecPoint *c=(AliPHOSEmcRecPoint *)cArray.UncheckedAt(i); | |
204 | ||
205 | if (c->TestBit(14)) continue; // This clusters is "used" | |
206 | ||
207 | Double_t dy = t.GetY() - c->GetY(), dz = t.GetZ() - c->GetZ(); | |
208 | Double_t d2 = dy*dy + dz*dz; | |
209 | if (d2 < maxd2) { | |
210 | maxd2=d2; | |
211 | bestCluster=c; | |
212 | } | |
213 | } | |
214 | ||
215 | if (!bestCluster) continue; // No reasonable matching found | |
216 | ||
217 | bestCluster->SetBit(14,kTRUE); // This clusters is now attached to a track | |
218 | ||
219 | matched++; | |
220 | ||
221 | // *** Now, do the PID with the "bestCluster" | |
222 | // and add the corresponding info to the ESD track pointed by "esdTrack" | |
223 | ||
224 | /* | |
225 | printf("%e %e %e %e\n",t.GetSign(), t.GetX() - bestCluster->GetX(), | |
226 | t.GetY() - bestCluster->GetY(), | |
227 | t.GetZ() - bestCluster->GetZ()); | |
228 | */ | |
229 | } | |
230 | ||
231 | Info("PropagateBack","Number of matched tracks: %d",matched); | |
232 | ||
233 | delete[] quality; | |
234 | delete[] index; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
ddd1a39c | 239 | //____________________________________________________________________________ |
04e92dc8 | 240 | AliCluster *AliPHOSTracker::GetCluster(Int_t index) const { |
241 | //-------------------------------------------------------------------- | |
242 | // Returns the pointer to a given cluster | |
243 | //-------------------------------------------------------------------- | |
244 | Int_t m=(index & 0xf0000000) >> 28; // Module number | |
245 | Int_t i=(index & 0x0fffffff) >> 00; // Index within the module | |
246 | ||
247 | return (AliCluster*)(fModules[m])->UncheckedAt(i); | |
248 | } | |
249 | ||
ddd1a39c | 250 | //____________________________________________________________________________ |
04e92dc8 | 251 | void AliPHOSTracker::UnloadClusters() { |
252 | //-------------------------------------------------------------------- | |
253 | // This function unloads the PHOS clusters | |
254 | //-------------------------------------------------------------------- | |
255 | for (Int_t i=0; i<5; i++) (fModules[i])->Delete(); | |
256 | } |