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b8dc484b | 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 | ||
d19b6003 | 16 | /* $Id$ */ |
17 | ||
5398f946 | 18 | /// \class AliMUONRecoCheck |
19 | /// \brief Utility class to check reconstruction | |
20 | /// Reconstructed tracks are compared to reference tracks. | |
21 | /// The reference tracks are built from AliTrackReference for the | |
22 | /// hit in chamber (0..9) and from kinematics for the vertex parameters. | |
b8dc484b | 23 | |
cc056de1 | 24 | #include "AliMUON.h" |
25 | #include "AliMUONRecoCheck.h" | |
26 | #include "AliMUONTrack.h" | |
27 | #include "AliMUONData.h" | |
28 | #include "AliMUONConstants.h" | |
b8dc484b | 29 | |
30 | #include "AliRun.h" // for gAlice | |
b8dc484b | 31 | #include "AliLoader.h" |
32 | #include "AliRunLoader.h" | |
b8dc484b | 33 | #include "AliHeader.h" |
b8dc484b | 34 | #include "AliStack.h" |
cc056de1 | 35 | #include "AliTrackReference.h" |
36 | #include "AliLog.h" | |
37 | ||
38 | #include <TParticle.h> | |
b8dc484b | 39 | |
5398f946 | 40 | /// \cond CLASSIMP |
b8dc484b | 41 | ClassImp(AliMUONRecoCheck) |
5398f946 | 42 | /// \endcond |
b8dc484b | 43 | |
44 | //_____________________________________________________________________________ | |
45 | AliMUONRecoCheck::AliMUONRecoCheck(Char_t *chLoader) | |
46 | { | |
d19b6003 | 47 | /// Constructor |
5398f946 | 48 | |
b8dc484b | 49 | fMuonTrackRef = new TClonesArray("AliMUONTrack", 10); |
50 | ||
51 | // open the run loader | |
52 | fRunLoader = AliRunLoader::Open(chLoader); | |
53 | if (!fRunLoader) { | |
54 | AliError(Form("no run loader found in file %s","galice.root" )); | |
55 | return; | |
56 | } | |
57 | // initialize loader's | |
58 | AliLoader *loader = fRunLoader->GetLoader("MUONLoader"); | |
59 | ||
60 | // initialize container | |
61 | fMUONData = new AliMUONData(loader,"MUON","MUON"); | |
62 | ||
63 | // Loading AliRun master | |
64 | if (fRunLoader->GetAliRun() == 0x0) fRunLoader->LoadgAlice(); | |
65 | ||
66 | fRunLoader->LoadKinematics("READ"); | |
67 | fRunLoader->LoadTrackRefs("READ"); | |
68 | loader->LoadTracks("READ"); | |
69 | ||
70 | fReconstructibleTracks = 0; | |
71 | fRecoTracks = 0; | |
72 | } | |
73 | ||
74 | //_____________________________________________________________________________ | |
75 | AliMUONRecoCheck::~AliMUONRecoCheck() | |
76 | { | |
d19b6003 | 77 | /// Destructor |
78 | ||
b8dc484b | 79 | fRunLoader->UnloadKinematics(); |
80 | fRunLoader->UnloadTrackRefs(); | |
81 | fRunLoader->UnloadTracks(); | |
29fc2c86 | 82 | fMuonTrackRef->Delete(); |
b8dc484b | 83 | delete fMuonTrackRef; |
84 | delete fMUONData; | |
85 | } | |
86 | ||
87 | //_____________________________________________________________________________ | |
88 | void AliMUONRecoCheck::MakeTrackRef() | |
89 | { | |
d19b6003 | 90 | /// Make reconstructible tracks |
b8dc484b | 91 | |
92 | AliTrackReference *trackReference; | |
93 | AliMUONTrack *muonTrack; | |
94 | AliMUONTrackParam *trackParam; | |
95 | AliMUONHitForRec *hitForRec; | |
96 | Float_t x, y, z, pX, pY, pZ, pYZ; | |
97 | Int_t track, trackSave; | |
98 | TParticle *particle; | |
99 | Float_t bendingSlope = 0; | |
100 | Float_t nonBendingSlope = 0; | |
101 | Float_t inverseBendingMomentum = 0; | |
102 | ||
103 | TTree* treeTR = fRunLoader->TreeTR(); | |
104 | if (treeTR == NULL) return; | |
105 | ||
106 | TBranch* branch = treeTR->GetBranch("MUON"); | |
107 | if (branch == NULL) return; | |
108 | ||
de876dd1 | 109 | TClonesArray* trackRefs = 0; |
b8dc484b | 110 | branch->SetAddress(&trackRefs); |
de876dd1 | 111 | branch->SetAutoDelete(kTRUE); |
b8dc484b | 112 | |
de876dd1 | 113 | Int_t nTrackRef = (Int_t)branch->GetEntries(); |
b8dc484b | 114 | |
115 | track = trackSave = -999; | |
116 | Bool_t isNewTrack; | |
30d3ea8a | 117 | Int_t iHitMin, iChamber, detElemId; |
b8dc484b | 118 | |
119 | trackParam = new AliMUONTrackParam(); | |
120 | hitForRec = new AliMUONHitForRec(); | |
121 | muonTrack = new AliMUONTrack(); | |
122 | ||
cc056de1 | 123 | Int_t max = fRunLoader->GetHeader()->Stack()->GetNtrack(); |
b8dc484b | 124 | for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; iTrackRef++) { |
cc056de1 | 125 | |
de876dd1 | 126 | branch->GetEntry(iTrackRef); |
b8dc484b | 127 | |
128 | iHitMin = 0; | |
129 | isNewTrack = kTRUE; | |
dba3c809 | 130 | |
29fc2c86 | 131 | if (!trackRefs->GetEntries()) continue; |
b8dc484b | 132 | |
29fc2c86 | 133 | while (isNewTrack) { |
b8dc484b | 134 | for (Int_t iHit = iHitMin; iHit < trackRefs->GetEntries(); iHit++) { |
135 | ||
136 | trackReference = (AliTrackReference*)trackRefs->At(iHit); | |
137 | x = trackReference->X(); | |
138 | y = trackReference->Y(); | |
139 | z = trackReference->Z(); | |
140 | pX = trackReference->Px(); | |
141 | pY = trackReference->Py(); | |
142 | pZ = trackReference->Pz(); | |
143 | ||
144 | track = trackReference->GetTrack(); | |
145 | ||
cc056de1 | 146 | if(track >= max){ |
147 | AliWarningStream() | |
148 | << "Track ID " << track | |
149 | << " larger than max number of particles " << max << endl; | |
150 | isNewTrack = kFALSE; | |
151 | break; | |
152 | } | |
b8dc484b | 153 | if (track != trackSave && iHit != 0) { |
154 | iHitMin = iHit; | |
155 | trackSave = track; | |
156 | break; | |
157 | } | |
158 | ||
159 | // track parameters at hit | |
160 | trackParam->SetBendingCoor(y); | |
161 | trackParam->SetNonBendingCoor(x); | |
162 | trackParam->SetZ(z); | |
cc056de1 | 163 | |
b8dc484b | 164 | if (TMath::Abs(pZ) > 0) { |
165 | bendingSlope = pY/pZ; | |
166 | nonBendingSlope = pX/pZ; | |
167 | } | |
168 | pYZ = TMath::Sqrt(pY*pY+pZ*pZ); | |
169 | if (pYZ >0) inverseBendingMomentum = 1/pYZ; | |
170 | ||
171 | trackParam->SetBendingSlope(bendingSlope); | |
172 | trackParam->SetNonBendingSlope(nonBendingSlope); | |
173 | trackParam->SetInverseBendingMomentum(inverseBendingMomentum); | |
174 | ||
175 | hitForRec->SetBendingCoor(y); | |
176 | hitForRec->SetNonBendingCoor(x); | |
177 | hitForRec->SetZ(z); | |
178 | hitForRec->SetBendingReso2(0.0); | |
30d3ea8a | 179 | hitForRec->SetNonBendingReso2(0.0); |
180 | detElemId = hitForRec->GetDetElemId(); | |
181 | if (detElemId) iChamber = detElemId / 100 - 1; | |
182 | else iChamber = AliMUONConstants::ChamberNumber(z); | |
b8dc484b | 183 | hitForRec->SetChamberNumber(iChamber); |
184 | ||
185 | muonTrack->AddTrackParamAtHit(trackParam); | |
186 | muonTrack->AddHitForRecAtHit(hitForRec); | |
187 | muonTrack->SetTrackID(track); | |
cc056de1 | 188 | |
b8dc484b | 189 | trackSave = track; |
190 | if (iHit == trackRefs->GetEntries()-1) isNewTrack = kFALSE; | |
191 | } | |
cc056de1 | 192 | |
b8dc484b | 193 | // track parameters at vertex |
194 | particle = fRunLoader->GetHeader()->Stack()->Particle(muonTrack->GetTrackID()); | |
cc056de1 | 195 | |
b8dc484b | 196 | if (particle) { |
cc056de1 | 197 | |
b8dc484b | 198 | x = particle->Vx(); |
199 | y = particle->Vy(); | |
200 | z = particle->Vz(); | |
201 | pX = particle->Px(); | |
202 | pY = particle->Py(); | |
203 | pZ = particle->Pz(); | |
204 | ||
205 | trackParam->SetBendingCoor(y); | |
206 | trackParam->SetNonBendingCoor(x); | |
207 | trackParam->SetZ(z); | |
208 | if (TMath::Abs(pZ) > 0) { | |
209 | bendingSlope = pY/pZ; | |
210 | nonBendingSlope = pX/pZ; | |
211 | } | |
212 | pYZ = TMath::Sqrt(pY*pY+pZ*pZ); | |
213 | if (pYZ >0) inverseBendingMomentum = 1/pYZ; | |
214 | trackParam->SetBendingSlope(bendingSlope); | |
215 | trackParam->SetNonBendingSlope(nonBendingSlope); | |
216 | trackParam->SetInverseBendingMomentum(inverseBendingMomentum); | |
217 | ||
218 | muonTrack->SetTrackParamAtVertex(trackParam); | |
219 | } | |
cc056de1 | 220 | |
b8dc484b | 221 | AddMuonTrackReference(muonTrack); |
222 | muonTrack->ResetTrackParamAtHit(); | |
223 | muonTrack->ResetHitForRecAtHit(); | |
224 | ||
225 | } // end while isNewTrack | |
b8dc484b | 226 | } |
227 | ||
228 | CleanMuonTrackRef(); | |
229 | ||
230 | ReconstructibleTracks(); | |
231 | ||
232 | delete muonTrack; | |
233 | delete trackParam; | |
234 | delete hitForRec; | |
b8dc484b | 235 | |
236 | } | |
237 | ||
238 | //____________________________________________________________________________ | |
239 | TClonesArray* AliMUONRecoCheck::GetTrackReco() | |
240 | { | |
d19b6003 | 241 | /// Return TClonesArray of reconstructed tracks |
b8dc484b | 242 | |
29fc2c86 | 243 | GetMUONData()->ResetRecTracks(); |
b8dc484b | 244 | GetMUONData()->SetTreeAddress("RT"); |
245 | fTrackReco = GetMUONData()->RecTracks(); | |
246 | GetMUONData()->GetRecTracks(); | |
247 | fRecoTracks = fTrackReco->GetEntriesFast(); | |
248 | return fTrackReco; | |
249 | } | |
250 | //_____________________________________________________________________________ | |
251 | void AliMUONRecoCheck::PrintEvent() const | |
252 | { | |
d19b6003 | 253 | /// Debug facility |
b8dc484b | 254 | |
255 | AliMUONTrack *track; | |
256 | AliMUONHitForRec *hitForRec; | |
257 | TClonesArray * hitForRecAtHit = 0; | |
258 | Float_t xRec,yRec,zRec; | |
259 | ||
260 | Int_t nTrackRef = fMuonTrackRef->GetEntriesFast(); | |
261 | ||
262 | printf(" ******************************* \n"); | |
263 | printf(" nb of tracks %d \n",nTrackRef); | |
264 | ||
265 | for (Int_t index = 0; index < nTrackRef; index++) { | |
266 | track = (AliMUONTrack*)fMuonTrackRef->At(index); | |
267 | hitForRecAtHit = track->GetHitForRecAtHit(); | |
268 | Int_t nTrackHits = hitForRecAtHit->GetEntriesFast(); | |
269 | printf(" track number %d \n",index); | |
270 | for (Int_t iHit = 0; iHit < nTrackHits; iHit++){ | |
271 | hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit); | |
272 | xRec = hitForRec->GetNonBendingCoor(); | |
273 | yRec = hitForRec->GetBendingCoor(); | |
274 | zRec = hitForRec->GetZ(); | |
275 | printf(" x,y,z: %f , %f , %f \n",xRec,yRec,zRec); | |
276 | } | |
277 | } | |
278 | } | |
279 | ||
280 | //_____________________________________________________________________________ | |
281 | void AliMUONRecoCheck::ResetTracks() const | |
282 | { | |
d19b6003 | 283 | /// Reset tracks |
284 | ||
b8dc484b | 285 | if (fMuonTrackRef) fMuonTrackRef->Clear(); |
286 | } | |
287 | //_____________________________________________________________________________ | |
288 | void AliMUONRecoCheck::CleanMuonTrackRef() | |
289 | { | |
d19b6003 | 290 | /// Re-calculate hits parameters because two AliTrackReferences are recorded for |
291 | /// each chamber (one when particle is entering + one when particle is leaving | |
292 | /// the sensitive volume) | |
b8dc484b | 293 | |
294 | Float_t maxGasGap = 1.; // cm | |
295 | AliMUONTrack *track, *trackNew; | |
296 | AliMUONHitForRec *hitForRec, *hitForRec1, *hitForRec2; | |
297 | AliMUONTrackParam *trackParam, *trackParam1, *trackParam2, *trackParamAtVertex; | |
298 | TClonesArray * hitForRecAtHit = 0; | |
299 | TClonesArray * trackParamAtHit = 0; | |
300 | Float_t xRec,yRec,zRec; | |
301 | Float_t xRec1,yRec1,zRec1; | |
302 | Float_t xRec2,yRec2,zRec2; | |
303 | Float_t bendingSlope,nonBendingSlope,bendingMomentum; | |
304 | Float_t bendingSlope1,nonBendingSlope1,bendingMomentum1; | |
305 | Float_t bendingSlope2,nonBendingSlope2,bendingMomentum2; | |
306 | TClonesArray *newMuonTrackRef = new TClonesArray("AliMUONTrack", 10); | |
307 | Int_t iHit1; | |
30d3ea8a | 308 | Int_t iChamber = 0, detElemId = 0; |
b8dc484b | 309 | Int_t nRec = 0; |
310 | Int_t nTrackHits = 0; | |
311 | ||
312 | hitForRec = new AliMUONHitForRec(); | |
313 | trackParam = new AliMUONTrackParam(); | |
314 | trackNew = new AliMUONTrack(); | |
315 | ||
316 | Int_t nTrackRef = fMuonTrackRef->GetEntriesFast(); | |
b8dc484b | 317 | for (Int_t index = 0; index < nTrackRef; index++) { |
318 | track = (AliMUONTrack*)fMuonTrackRef->At(index); | |
319 | hitForRecAtHit = track->GetHitForRecAtHit(); | |
320 | trackParamAtHit = track->GetTrackParamAtHit(); | |
321 | trackParamAtVertex = track->GetTrackParamAtVertex(); | |
322 | nTrackHits = hitForRecAtHit->GetEntriesFast(); | |
323 | iHit1 = 0; | |
324 | while (iHit1 < nTrackHits) { | |
325 | hitForRec1 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit1); | |
326 | trackParam1 = (AliMUONTrackParam*) trackParamAtHit->At(iHit1); | |
327 | xRec1 = hitForRec1->GetNonBendingCoor(); | |
328 | yRec1 = hitForRec1->GetBendingCoor(); | |
329 | zRec1 = hitForRec1->GetZ(); | |
330 | xRec = xRec1; | |
331 | yRec = yRec1; | |
332 | zRec = zRec1; | |
333 | bendingSlope1 = trackParam1->GetBendingSlope(); | |
334 | nonBendingSlope1 = trackParam1->GetNonBendingSlope(); | |
de876dd1 | 335 | bendingMomentum1 = 0; |
336 | if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0) | |
337 | bendingMomentum1 = 1./trackParam1->GetInverseBendingMomentum(); | |
b8dc484b | 338 | bendingSlope = bendingSlope1; |
339 | nonBendingSlope = nonBendingSlope1; | |
340 | bendingMomentum = bendingMomentum1; | |
341 | nRec = 1; | |
342 | for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) { | |
343 | hitForRec2 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit2); | |
344 | trackParam2 = (AliMUONTrackParam*) trackParamAtHit->At(iHit2); | |
345 | xRec2 = hitForRec2->GetNonBendingCoor(); | |
346 | yRec2 = hitForRec2->GetBendingCoor(); | |
347 | zRec2 = hitForRec2->GetZ(); | |
348 | bendingSlope2 = trackParam2->GetBendingSlope(); | |
349 | nonBendingSlope2 = trackParam2->GetNonBendingSlope(); | |
de876dd1 | 350 | bendingMomentum2 = 0; |
351 | if (TMath::Abs(trackParam2->GetInverseBendingMomentum()) > 0) | |
352 | bendingMomentum2 = 1./trackParam2->GetInverseBendingMomentum(); | |
b8dc484b | 353 | |
354 | if ( TMath::Abs(zRec2-zRec1) < maxGasGap ) { | |
cc056de1 | 355 | |
b8dc484b | 356 | nRec++; |
357 | xRec += xRec2; | |
358 | yRec += yRec2; | |
359 | zRec += zRec2; | |
360 | bendingSlope += bendingSlope2; | |
361 | nonBendingSlope += nonBendingSlope2; | |
362 | bendingMomentum += bendingMomentum2; | |
363 | iHit1 = iHit2; | |
364 | } | |
365 | ||
366 | } // end iHit2 | |
367 | xRec /= (Float_t)nRec; | |
368 | yRec /= (Float_t)nRec; | |
369 | zRec /= (Float_t)nRec; | |
370 | bendingSlope /= (Float_t)nRec; | |
371 | nonBendingSlope /= (Float_t)nRec; | |
372 | bendingMomentum /= (Float_t)nRec; | |
373 | ||
374 | hitForRec->SetNonBendingCoor(xRec); | |
375 | hitForRec->SetBendingCoor(yRec); | |
376 | hitForRec->SetZ(zRec); | |
30d3ea8a | 377 | detElemId = hitForRec->GetDetElemId(); |
378 | if (detElemId) iChamber = detElemId / 100 - 1; | |
379 | else iChamber = AliMUONConstants::ChamberNumber(zRec); | |
b8dc484b | 380 | hitForRec->SetChamberNumber(iChamber); |
381 | hitForRec->SetBendingReso2(0.0); | |
382 | hitForRec->SetNonBendingReso2(0.0); | |
383 | trackParam->SetNonBendingCoor(xRec); | |
384 | trackParam->SetBendingCoor(yRec); | |
385 | trackParam->SetZ(zRec); | |
386 | trackParam->SetNonBendingSlope(nonBendingSlope); | |
387 | trackParam->SetBendingSlope(bendingSlope); | |
de876dd1 | 388 | if (TMath::Abs(bendingMomentum) > 0) |
389 | trackParam->SetInverseBendingMomentum(1./bendingMomentum); | |
b8dc484b | 390 | |
391 | trackNew->AddHitForRecAtHit(hitForRec); | |
392 | trackNew->AddTrackParamAtHit(trackParam); | |
393 | ||
394 | iHit1++; | |
395 | } // end iHit1 | |
396 | ||
397 | trackNew->SetTrackID(track->GetTrackID()); | |
398 | trackNew->SetTrackParamAtVertex(trackParamAtVertex); | |
399 | {new ((*newMuonTrackRef)[newMuonTrackRef->GetEntriesFast()]) AliMUONTrack(*trackNew);} | |
400 | trackNew->ResetHitForRecAtHit(); | |
401 | trackNew->ResetTrackParamAtHit(); | |
402 | ||
403 | } // end trackRef | |
404 | ||
405 | fMuonTrackRef->Clear(); | |
406 | nTrackRef = newMuonTrackRef->GetEntriesFast(); | |
407 | for (Int_t index = 0; index < nTrackRef; index++) { | |
408 | track = (AliMUONTrack*)newMuonTrackRef->At(index); | |
409 | AddMuonTrackReference(track); | |
410 | } | |
411 | ||
412 | ||
413 | delete trackNew; | |
414 | delete hitForRec; | |
415 | delete trackParam; | |
29fc2c86 | 416 | newMuonTrackRef->Delete(); |
b8dc484b | 417 | delete newMuonTrackRef; |
418 | ||
419 | } | |
420 | ||
421 | //_____________________________________________________________________________ | |
422 | void AliMUONRecoCheck::ReconstructibleTracks() | |
423 | { | |
d19b6003 | 424 | /// Calculate the number of reconstructible tracks |
b8dc484b | 425 | |
426 | AliMUONTrack* track; | |
427 | TClonesArray* hitForRecAtHit = NULL; | |
428 | AliMUONHitForRec* hitForRec; | |
429 | Float_t zRec; | |
430 | Int_t nTrackRef, nTrackHits; | |
431 | Int_t isChamberInTrack[10]; | |
432 | Int_t iChamber = 0; | |
433 | Bool_t isTrackOK = kTRUE; | |
434 | ||
435 | fReconstructibleTracks = 0; | |
436 | ||
437 | nTrackRef = fMuonTrackRef->GetEntriesFast(); | |
438 | for (Int_t index = 0; index < nTrackRef; index++) { | |
439 | track = (AliMUONTrack*)fMuonTrackRef->At(index); | |
440 | hitForRecAtHit = track->GetHitForRecAtHit(); | |
441 | nTrackHits = hitForRecAtHit->GetEntriesFast(); | |
442 | for (Int_t ch = 0; ch < 10; ch++) isChamberInTrack[ch] = 0; | |
443 | ||
444 | for ( Int_t iHit = 0; iHit < nTrackHits; iHit++) { | |
445 | hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit); | |
446 | zRec = hitForRec->GetZ(); | |
447 | iChamber = hitForRec->GetChamberNumber(); | |
448 | if (iChamber < 0 || iChamber > 10) continue; | |
449 | isChamberInTrack[iChamber] = 1; | |
cc056de1 | 450 | } |
451 | // track is reconstructible if the particle is depositing a hit | |
452 | // in the following chamber combinations: | |
453 | ||
b8dc484b | 454 | isTrackOK = kTRUE; |
cc056de1 | 455 | if (!isChamberInTrack[0] && !isChamberInTrack[1]) isTrackOK = kFALSE; |
456 | if (!isChamberInTrack[2] && !isChamberInTrack[3]) isTrackOK = kFALSE; | |
457 | if (!isChamberInTrack[4] && !isChamberInTrack[5]) isTrackOK = kFALSE; | |
458 | Int_t nHitsInLastStations=0; | |
459 | for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++) | |
460 | if (isChamberInTrack[ch]) nHitsInLastStations++; | |
461 | if(nHitsInLastStations < 3) isTrackOK = kFALSE; | |
462 | ||
463 | if (isTrackOK) fReconstructibleTracks++; | |
b8dc484b | 464 | if (!isTrackOK) fMuonTrackRef->Remove(track); // remove non reconstructible tracks |
465 | } | |
466 | fMuonTrackRef->Compress(); | |
467 | } | |
468 |