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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 | // A Reconstructed Particle in PHOS | |
18 | // To become a general class of AliRoot ? | |
19 | // Why should I put meaningless comments | |
20 | // just to satisfy | |
21 | // the code checker | |
22 | // | |
23 | //*-- Author: Yves Schutz (SUBATECH) | |
24 | ||
25 | ||
26 | // --- ROOT system --- | |
27 | ||
28 | // --- Standard library --- | |
29 | ||
30 | ||
31 | // --- AliRoot header files --- | |
32 | #include "AliStack.h" | |
33 | #include "AliPHOSHit.h" | |
34 | #include "AliPHOSDigit.h" | |
35 | #include "AliPHOSTrackSegment.h" | |
36 | #include "AliPHOSEmcRecPoint.h" | |
37 | #include "AliPHOSRecParticle.h" | |
38 | #include "AliPHOSLoader.h" | |
39 | #include "AliPHOSGeometry.h" | |
40 | #include "AliLog.h" | |
41 | ||
42 | //____________________________________________________________________________ | |
43 | AliPHOSRecParticle::AliPHOSRecParticle(): | |
44 | fPHOSTrackSegment(0), | |
45 | fDebug(kFALSE), | |
46 | fPos() | |
47 | { | |
48 | // ctor | |
49 | const Int_t nSPECIES = AliPID::kSPECIESCN; | |
50 | for(Int_t i = 0; i<nSPECIES ; i++) | |
51 | fPID[i]=0.; | |
52 | } | |
53 | ||
54 | ||
55 | //____________________________________________________________________________ | |
56 | AliPHOSRecParticle::AliPHOSRecParticle(const AliPHOSRecParticle & rp): | |
57 | AliPHOSFastRecParticle(rp), | |
58 | fPHOSTrackSegment(rp.fPHOSTrackSegment), | |
59 | fDebug(kFALSE), | |
60 | fPos() | |
61 | { | |
62 | // copy ctor | |
63 | fType = rp.fType ; | |
64 | fIndexInList = rp.fIndexInList ; | |
65 | ||
66 | fPdgCode = rp.fPdgCode; | |
67 | fStatusCode = rp.fStatusCode; | |
68 | fMother[0] = rp.fMother[0]; | |
69 | fMother[1] = rp.fMother[1]; | |
70 | fDaughter[0] = rp.fDaughter[0]; | |
71 | fDaughter[1] = rp.fDaughter[1]; | |
72 | fWeight = rp.fWeight; | |
73 | fCalcMass = rp.fCalcMass; | |
74 | fPx = rp.fPx; | |
75 | fPy = rp.fPy; | |
76 | fPz = rp.fPz; | |
77 | fE = rp.fE; | |
78 | fVx = rp.fVx; | |
79 | fVy = rp.fVy; | |
80 | fVz = rp.fVz; | |
81 | fVt = rp.fVt; | |
82 | fPolarTheta = rp.fPolarTheta; | |
83 | fPolarPhi = rp.fPolarPhi; | |
84 | fParticlePDG = rp.fParticlePDG; | |
85 | const Int_t nSPECIES = AliPID::kSPECIESCN; | |
86 | for(Int_t i = 0; i<nSPECIES ; i++) | |
87 | fPID[i]=rp.fPID[i]; | |
88 | } | |
89 | ||
90 | //____________________________________________________________________________ | |
91 | AliPHOSRecParticle & AliPHOSRecParticle::operator = (const AliPHOSRecParticle &) | |
92 | { | |
93 | Fatal("operator =", "not implemented"); | |
94 | return *this; | |
95 | } | |
96 | ||
97 | //____________________________________________________________________________ | |
98 | Int_t AliPHOSRecParticle::GetNPrimaries() const | |
99 | { | |
100 | return -1; | |
101 | } | |
102 | ||
103 | //____________________________________________________________________________ | |
104 | Int_t AliPHOSRecParticle::GetNPrimariesToRecParticles() const | |
105 | { | |
106 | // Get the number of primaries at the origine of the RecParticle | |
107 | Int_t rv = 0 ; | |
108 | AliRunLoader* rl = AliRunLoader::Instance() ; | |
109 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); | |
110 | Int_t emcRPindex = static_cast<AliPHOSTrackSegment*>(phosLoader->TrackSegments()->At(GetPHOSTSIndex()))->GetEmcIndex(); | |
111 | static_cast<AliPHOSEmcRecPoint*>(phosLoader->EmcRecPoints()->At(emcRPindex))->GetPrimaries(rv) ; | |
112 | return rv ; | |
113 | } | |
114 | ||
115 | //____________________________________________________________________________ | |
116 | const TParticle * AliPHOSRecParticle::GetPrimary() const | |
117 | { | |
118 | // Get the primary particle at the origine of the RecParticle and | |
119 | // which has deposited the largest energy in SDigits | |
120 | AliRunLoader* rl = AliRunLoader::Instance() ; | |
121 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); | |
122 | rl->GetEvent(rl->GetEventNumber()) ; | |
123 | rl->LoadKinematics("READ"); | |
124 | rl->LoadSDigits("READ"); | |
125 | ||
126 | if(GetNPrimaries() == 0) | |
127 | return 0 ; | |
128 | if(GetNPrimaries() == 1) | |
129 | return GetPrimary(0) ; | |
130 | Int_t AbsId = 0; | |
131 | Int_t module ; | |
132 | ||
133 | // Get PHOS Geometry object | |
134 | AliPHOSGeometry *geom; | |
135 | if (!(geom = AliPHOSGeometry::GetInstance())) | |
136 | geom = AliPHOSGeometry::GetInstance("IHEP",""); | |
137 | Double_t x,z ; | |
138 | //DP to be fixed: Why do we use this method here??? M.B. use RecPoint??? | |
139 | Double_t vtx[3]={0.,0.,0.} ; | |
140 | geom->ImpactOnEmc(vtx,static_cast<double>(Theta()),static_cast<double>(Phi()), module,z,x); | |
141 | Int_t amp = 0 ; | |
142 | Int_t iPrim=-1 ; | |
143 | if(module != 0){ | |
144 | geom->RelPosToAbsId(module,x,z,AbsId) ; | |
145 | TClonesArray * sdigits = phosLoader->SDigits() ; | |
146 | AliPHOSDigit * sdig ; | |
147 | ||
148 | for(Int_t i = 0 ; i < sdigits->GetEntriesFast() ; i++){ | |
149 | sdig = static_cast<AliPHOSDigit *>(sdigits->At(i)) ; | |
150 | if((sdig->GetId() == AbsId)){ | |
151 | if((sdig->GetAmp() > amp) && (sdig->GetNprimary())){ | |
152 | amp = sdig->GetAmp() ; | |
153 | iPrim = sdig->GetPrimary(1) ; | |
154 | } | |
155 | // do not scan rest of list | |
156 | if(sdig->GetId() > AbsId) | |
157 | continue ; | |
158 | } | |
159 | } | |
160 | } | |
161 | if(iPrim >= 0) | |
162 | return rl->Stack()->Particle(iPrim) ; | |
163 | else | |
164 | return 0 ; | |
165 | } | |
166 | ||
167 | //____________________________________________________________________________ | |
168 | Int_t AliPHOSRecParticle::GetPrimaryIndex() const | |
169 | { | |
170 | // Get the primary track index in TreeK which deposits the most energy | |
171 | // in Digits which forms EmcRecPoint, which produces TrackSegment, | |
172 | // which the RecParticle is created from | |
173 | ||
174 | ||
175 | AliRunLoader* rl = AliRunLoader::Instance() ; | |
176 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); | |
177 | rl->GetEvent(rl->GetEventNumber()) ; | |
178 | rl->LoadHits("READ"); | |
179 | rl->LoadDigits("READ"); | |
180 | rl->LoadRecPoints("READ"); | |
181 | rl->LoadTracks("READ"); | |
182 | ||
183 | // Get TrackSegment corresponding to this RecParticle | |
184 | const AliPHOSTrackSegment *ts = phosLoader->TrackSegment(fPHOSTrackSegment); | |
185 | ||
186 | // Get EmcRecPoint corresponding to this TrackSegment | |
187 | Int_t emcRecPointIndex = ts->GetEmcIndex(); | |
188 | ||
189 | const AliPHOSEmcRecPoint *emcRecPoint = phosLoader->EmcRecPoint(emcRecPointIndex); | |
190 | ||
191 | // Get the list of digits forming this EmcRecParticle | |
192 | Int_t nDigits = emcRecPoint->GetDigitsMultiplicity(); | |
193 | Int_t *digitList = emcRecPoint->GetDigitsList(); | |
194 | ||
195 | // Find the digit with maximum amplitude | |
196 | Int_t maxAmp = 0; | |
197 | Int_t bestDigitIndex = -1; | |
198 | for (Int_t iDigit=0; iDigit<nDigits; iDigit++) { | |
199 | const AliPHOSDigit * digit = phosLoader->Digit(digitList[iDigit]); | |
200 | if (digit->GetAmp() > maxAmp) { | |
201 | maxAmp = digit->GetAmp(); | |
202 | bestDigitIndex = iDigit; | |
203 | } | |
204 | } | |
205 | if (bestDigitIndex>-1) { | |
206 | const AliPHOSDigit * digit = phosLoader->Digit(digitList[bestDigitIndex]); | |
207 | if (digit==0) return -12345; | |
208 | } | |
209 | ||
210 | // Get the list of primary tracks producing this digit | |
211 | // and find which track has more track energy. | |
212 | //Int_t nPrimary = digit->GetNprimary(); | |
213 | //TParticle *track = 0; | |
214 | //Double_t energyEM = 0; | |
215 | //Double_t energyHadron = 0; | |
216 | //Int_t trackEM = -1; | |
217 | //Int_t trackHadron = -1; | |
218 | //for (Int_t iPrim=0; iPrim<nPrimary; iPrim++) { | |
219 | // Int_t iPrimary = digit->GetPrimary(iPrim+1); | |
220 | // if (iPrimary == -1 || TMath::Abs(iPrimary)>10000000) | |
221 | // continue ; //PH 10000000 is the shift of the track | |
222 | // //PH indexes in the underlying event | |
223 | // track = gime->Primary(iPrimary); | |
224 | // Int_t pdgCode = track->GetPdgCode(); | |
225 | // Double_t energy = track->Energy(); | |
226 | // if (pdgCode==22 || TMath::Abs(pdgCode)==11) { | |
227 | // if (energy > energyEM) { | |
228 | // energyEM = energy; | |
229 | // trackEM = iPrimary; | |
230 | // } | |
231 | // } | |
232 | // else { | |
233 | // if (energy > energyHadron) { | |
234 | // energyHadron = energy; | |
235 | // trackHadron = iPrimary; | |
236 | // } | |
237 | // } | |
238 | //} | |
239 | // Preferences are given to electromagnetic tracks | |
240 | //if (trackEM != -1) return trackEM; // track is gamma or e+- | |
241 | //if (trackHadron != -1) return trackHadron; // track is hadron | |
242 | //return -12345; // no track found :( | |
243 | ||
244 | ||
245 | // Get the list of hits producing this digit, | |
246 | // find which hit has deposited more energy | |
247 | // and find the primary track. | |
248 | ||
249 | TClonesArray *hits = phosLoader->Hits(); | |
250 | if (hits==0) return -12345; | |
251 | ||
252 | Double_t maxedep = 0; | |
253 | Int_t maxtrack = -1; | |
254 | Int_t nHits = hits ->GetEntries(); | |
255 | Int_t id = (phosLoader->Digit(digitList[bestDigitIndex]))->GetId(); | |
256 | ||
257 | for (Int_t iHit=0; iHit<nHits; iHit++) { | |
258 | const AliPHOSHit * hit = phosLoader->Hit(iHit); | |
259 | if(hit->GetId() == id){ | |
260 | Double_t edep = hit->GetEnergy(); | |
261 | Int_t track = hit->GetPrimary(); | |
262 | if(edep > maxedep){ | |
263 | maxedep = edep; | |
264 | maxtrack = track; | |
265 | } | |
266 | } | |
267 | } | |
268 | ||
269 | if (maxtrack != -1) return maxtrack; // track is hadron | |
270 | return -12345; // no track found :( | |
271 | } | |
272 | ||
273 | //____________________________________________________________________________ | |
274 | const TParticle * AliPHOSRecParticle::GetPrimary(Int_t index) const | |
275 | { | |
276 | // Get one of the primary particles at the origine of the RecParticle | |
277 | if ( index > GetNPrimariesToRecParticles() ) { | |
278 | if (fDebug) | |
279 | Warning("GetPrimary", "AliPHOSRecParticle::GetPrimary -> %d is larger that the number of primaries %d", | |
280 | index, GetNPrimaries()) ; | |
281 | return 0 ; | |
282 | } | |
283 | else { | |
284 | Int_t dummy ; | |
285 | AliRunLoader* rl = AliRunLoader::Instance() ; | |
286 | AliPHOSLoader * phosLoader = static_cast<AliPHOSLoader*>(rl->GetLoader("PHOSLoader")); | |
287 | ||
288 | Int_t emcRPindex = static_cast<AliPHOSTrackSegment*>(phosLoader->TrackSegments()->At(GetPHOSTSIndex()))->GetEmcIndex(); | |
289 | Int_t primaryindex = static_cast<AliPHOSEmcRecPoint*>(phosLoader->EmcRecPoints()->At(emcRPindex))->GetPrimaries(dummy)[index] ; | |
290 | return rl->Stack()->Particle(primaryindex) ; | |
291 | } | |
292 | // return 0 ; | |
293 | } | |
294 | ||
295 | //____________________________________________________________________________ | |
296 | void AliPHOSRecParticle::SetPID(Int_t type, Float_t weight) | |
297 | { | |
298 | // Set the probability densities that this reconstructed particle | |
299 | // has a type of i: | |
300 | // i particle types | |
301 | // ---------------------- | |
302 | // 0 electron | |
303 | // 1 muon | |
304 | // 2 pi+- | |
305 | // 3 K+- | |
306 | // 4 p/pbar | |
307 | // 5 photon | |
308 | // 6 pi0 at high pt | |
309 | // 7 neutron | |
310 | // 8 K0L | |
311 | // 9 Conversion electron | |
312 | ||
313 | fPID[type] = weight ; | |
314 | } |