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8d0843c6 | 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 | ||
16 | /* $Id$ */ | |
17 | ||
18 | //////////////////////////////////// | |
19 | // | |
20 | // Virtual MUON track reconstructor in ALICE (class renamed from AliMUONEventReconstructor) | |
21 | // | |
22 | // This class contains as data: | |
23 | // * a pointer to the array of hits to be reconstructed (the event) | |
24 | // * a pointer to the array of segments made with these hits inside each station | |
25 | // * a pointer to the array of reconstructed tracks | |
26 | // | |
27 | // It contains as methods, among others: | |
28 | // * EventReconstruct to build the muon tracks | |
29 | // * EventReconstructTrigger to build the trigger tracks | |
30 | // | |
31 | //////////////////////////////////// | |
32 | ||
33 | #include <stdlib.h> | |
34 | #include <Riostream.h> | |
35 | #include <TTree.h> | |
36 | ||
37 | #include "AliMUONVTrackReconstructor.h" | |
38 | #include "AliMUONData.h" | |
39 | #include "AliMUONConstants.h" | |
40 | #include "AliMUONHitForRec.h" | |
41 | #include "AliMUONTriggerTrack.h" | |
e1a10d41 | 42 | #include "AliMUONTriggerCircuit.h" |
8d0843c6 | 43 | #include "AliMUONLocalTrigger.h" |
44 | #include "AliMUONGlobalTrigger.h" | |
45 | #include "AliMUONSegment.h" | |
46 | #include "AliMUONTrack.h" | |
37827b29 | 47 | #include "AliMUONTrackParam.h" |
48 | #include "AliMUONTrackExtrap.h" | |
8d0843c6 | 49 | #include "AliMagF.h" |
50 | #include "AliLog.h" | |
51 | #include "AliTracker.h" | |
52 | ||
53 | ClassImp(AliMUONVTrackReconstructor) // Class implementation in ROOT context | |
54 | ||
55 | //************* Defaults parameters for reconstruction | |
56 | const Double_t AliMUONVTrackReconstructor::fgkDefaultMinBendingMomentum = 3.0; | |
57 | const Double_t AliMUONVTrackReconstructor::fgkDefaultMaxBendingMomentum = 3000.0; | |
58 | const Double_t AliMUONVTrackReconstructor::fgkDefaultBendingResolution = 0.01; | |
59 | const Double_t AliMUONVTrackReconstructor::fgkDefaultNonBendingResolution = 0.144; | |
60 | const Double_t AliMUONVTrackReconstructor::fgkDefaultMaxSigma2Distance = 16.0; | |
61 | // Simple magnetic field: | |
62 | // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG | |
63 | // Length and Position from reco_muon.F, with opposite sign: | |
64 | // Length = ZMAGEND-ZCOIL | |
65 | // Position = (ZMAGEND+ZCOIL)/2 | |
66 | // to be ajusted differently from real magnetic field ???? | |
67 | const Double_t AliMUONVTrackReconstructor::fgkDefaultSimpleBValue = 7.0; | |
68 | const Double_t AliMUONVTrackReconstructor::fgkDefaultSimpleBLength = 428.0; | |
69 | const Double_t AliMUONVTrackReconstructor::fgkDefaultSimpleBPosition = 1019.0; | |
70 | ||
71 | //__________________________________________________________________________ | |
72 | AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(AliMUONData* data) | |
73 | : TObject(), | |
74 | fMinBendingMomentum(fgkDefaultMinBendingMomentum), | |
75 | fMaxBendingMomentum(fgkDefaultMaxBendingMomentum), | |
76 | fBendingResolution(fgkDefaultBendingResolution), | |
77 | fNonBendingResolution(fgkDefaultNonBendingResolution), | |
78 | fMaxSigma2Distance(fgkDefaultMaxSigma2Distance), | |
79 | fChamberThicknessInX0(AliMUONConstants::DefaultChamberThicknessInX0()), | |
80 | fSimpleBValue(fgkDefaultSimpleBValue), | |
81 | fSimpleBLength(fgkDefaultSimpleBLength), | |
82 | fSimpleBPosition(fgkDefaultSimpleBPosition), | |
83 | fSegmentMaxDistBending(0x0), | |
84 | fSegmentMaxDistNonBending(0x0), | |
85 | fHitsForRecPtr(0x0), | |
86 | fNHitsForRec(0), | |
87 | fNHitsForRecPerChamber(0x0), | |
88 | fIndexOfFirstHitForRecPerChamber(0x0), | |
89 | fSegmentsPtr(0x0), | |
90 | fNSegments(0x0), | |
91 | fRecTracksPtr(0x0), | |
92 | fNRecTracks(0), | |
93 | fMUONData(data), | |
94 | fTriggerTrack(new AliMUONTriggerTrack()), | |
95 | fTriggerCircuit(0x0) | |
96 | { | |
97 | /// Constructor for class AliMUONVTrackReconstructor | |
98 | fSegmentMaxDistBending = new Double_t[AliMUONConstants::NTrackingSt()]; | |
99 | fSegmentMaxDistNonBending = new Double_t[AliMUONConstants::NTrackingSt()]; | |
100 | fNHitsForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()]; | |
101 | fIndexOfFirstHitForRecPerChamber = new Int_t[AliMUONConstants::NTrackingCh()]; | |
102 | ||
103 | SetReconstructionParametersToDefaults(); | |
104 | ||
105 | // Memory allocation for the TClonesArray of hits for reconstruction | |
106 | // Is 10000 the right size ???? | |
107 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
108 | ||
109 | // Memory allocation for the TClonesArray's of segments in stations | |
110 | // Is 2000 the right size ???? | |
111 | fSegmentsPtr = new TClonesArray*[AliMUONConstants::NTrackingSt()]; | |
112 | fNSegments = new Int_t[AliMUONConstants::NTrackingSt()]; | |
113 | for (Int_t st = 0; st < AliMUONConstants::NTrackingSt(); st++) { | |
114 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); | |
115 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? | |
116 | } | |
117 | ||
118 | const AliMagF* kField = AliTracker::GetFieldMap(); | |
119 | if (!kField) AliFatal("No field available"); | |
120 | // Sign of fSimpleBValue according to sign of Bx value at (50,50,-950). | |
121 | Float_t b[3], x[3]; | |
122 | x[0] = 50.; x[1] = 50.; x[2] = -950.; | |
123 | kField->Field(x,b); | |
124 | ||
125 | fSimpleBValue = TMath::Sign(fSimpleBValue,(Double_t) b[0]); | |
126 | fSimpleBPosition = TMath::Sign(fSimpleBPosition,(Double_t) x[2]); | |
127 | // See how to get fSimple(BValue, BLength, BPosition) | |
128 | // automatically calculated from the actual magnetic field ???? | |
37827b29 | 129 | |
130 | // set the magnetic field for track extrapolations | |
131 | AliMUONTrackExtrap::SetField(kField); | |
8d0843c6 | 132 | } |
133 | ||
134 | //__________________________________________________________________________ | |
135 | AliMUONVTrackReconstructor::~AliMUONVTrackReconstructor(void) | |
136 | { | |
137 | /// Destructor for class AliMUONVTrackReconstructor | |
138 | delete [] fSegmentMaxDistBending; | |
139 | delete [] fSegmentMaxDistNonBending; | |
140 | delete [] fNHitsForRecPerChamber; | |
141 | delete [] fIndexOfFirstHitForRecPerChamber; | |
142 | delete fTriggerTrack; | |
143 | delete fHitsForRecPtr; | |
144 | // Correct destruction of everything ???? | |
145 | for (Int_t st = 0; st < AliMUONConstants::NTrackingSt(); st++) delete fSegmentsPtr[st]; | |
146 | delete [] fSegmentsPtr; | |
147 | delete [] fNSegments; | |
148 | } | |
149 | ||
150 | //__________________________________________________________________________ | |
151 | void AliMUONVTrackReconstructor::SetReconstructionParametersToDefaults(void) | |
152 | { | |
153 | /// Set reconstruction parameters for making segments to default values | |
154 | // Would be much more convenient with a structure (or class) ???? | |
155 | ||
156 | // ******** Parameters for making segments | |
157 | // should be parametrized ???? | |
158 | // according to interval between chambers in a station ???? | |
159 | // Maximum distance in non bending plane | |
160 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT | |
161 | // SIGCUT*DYMAX(IZ) | |
162 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) | |
163 | fSegmentMaxDistNonBending[st] = 5. * 0.22; | |
164 | // Maximum distance in bending plane: | |
165 | // values from TRACKF_STAT, corresponding to (J psi 20cm), | |
166 | // scaled to the real distance between chambers in a station | |
167 | fSegmentMaxDistBending[0] = TMath::Abs( 1.5 * | |
168 | (AliMUONConstants::DefaultChamberZ(1) - AliMUONConstants::DefaultChamberZ(0)) / 20.0); | |
169 | fSegmentMaxDistBending[1] = TMath::Abs( 1.5 * | |
170 | (AliMUONConstants::DefaultChamberZ(3) - AliMUONConstants::DefaultChamberZ(2)) / 20.0); | |
171 | fSegmentMaxDistBending[2] = TMath::Abs( 3.0 * | |
172 | (AliMUONConstants::DefaultChamberZ(5) - AliMUONConstants::DefaultChamberZ(4)) / 20.0); | |
173 | fSegmentMaxDistBending[3] = TMath::Abs( 6.0 * | |
174 | (AliMUONConstants::DefaultChamberZ(7) - AliMUONConstants::DefaultChamberZ(6)) / 20.0); | |
175 | fSegmentMaxDistBending[4] = TMath::Abs( 6.0 * | |
176 | (AliMUONConstants::DefaultChamberZ(9) - AliMUONConstants::DefaultChamberZ(8)) / 20.0); | |
177 | ||
178 | return; | |
179 | } | |
180 | ||
181 | //__________________________________________________________________________ | |
182 | void AliMUONVTrackReconstructor::EventReconstruct(void) | |
183 | { | |
184 | // To reconstruct one event | |
185 | AliDebug(1,"Enter EventReconstruct"); | |
186 | ResetTracks(); //AZ | |
187 | ResetSegments(); //AZ | |
188 | ResetHitsForRec(); //AZ | |
189 | AddHitsForRecFromRawClusters(); | |
190 | MakeSegments(); | |
191 | MakeTracks(); | |
192 | if (fMUONData->IsTriggerTrackBranchesInTree()) | |
193 | ValidateTracksWithTrigger(); | |
194 | ||
195 | // Add tracks to MUON data container | |
196 | for(Int_t i=0; i<fNRecTracks; i++) { | |
197 | AliMUONTrack * track = (AliMUONTrack*) fRecTracksPtr->At(i); | |
198 | fMUONData->AddRecTrack(*track); | |
199 | } | |
200 | } | |
201 | ||
202 | //__________________________________________________________________________ | |
203 | void AliMUONVTrackReconstructor::ResetTracks(void) | |
204 | { | |
205 | /// To reset the TClonesArray of reconstructed tracks | |
206 | if (fRecTracksPtr) fRecTracksPtr->Delete(); | |
207 | // Delete in order that the Track destructors are called, | |
208 | // hence the space for the TClonesArray of pointers to TrackHit's is freed | |
209 | fNRecTracks = 0; | |
210 | return; | |
211 | } | |
212 | ||
213 | //__________________________________________________________________________ | |
214 | void AliMUONVTrackReconstructor::ResetSegments(void) | |
215 | { | |
216 | /// To reset the TClonesArray of segments and the number of Segments for all stations | |
217 | for (Int_t st = 0; st < AliMUONConstants::NTrackingCh()/2; st++) { | |
218 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); | |
219 | fNSegments[st] = 0; | |
220 | } | |
221 | return; | |
222 | } | |
223 | ||
224 | //__________________________________________________________________________ | |
225 | void AliMUONVTrackReconstructor::ResetHitsForRec(void) | |
226 | { | |
227 | /// To reset the array and the number of HitsForRec, | |
228 | /// and also the number of HitsForRec | |
229 | /// and the index of the first HitForRec per chamber | |
230 | if (fHitsForRecPtr) fHitsForRecPtr->Delete(); | |
231 | fNHitsForRec = 0; | |
232 | for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) | |
233 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
234 | return; | |
235 | } | |
236 | ||
237 | //__________________________________________________________________________ | |
238 | void AliMUONVTrackReconstructor::SortHitsForRecWithIncreasingChamber() | |
239 | { | |
240 | /// Sort HitsForRec's in increasing order with respect to chamber number. | |
241 | /// Uses the function "Compare". | |
242 | /// Update the information for HitsForRec per chamber too. | |
243 | Int_t ch, nhits, prevch; | |
244 | fHitsForRecPtr->Sort(); | |
245 | for (ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) { | |
246 | fNHitsForRecPerChamber[ch] = 0; | |
247 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
248 | } | |
249 | prevch = 0; // previous chamber | |
250 | nhits = 0; // number of hits in current chamber | |
251 | // Loop over HitsForRec | |
252 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
253 | // chamber number (0...) | |
254 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
255 | // increment number of hits in current chamber | |
256 | (fNHitsForRecPerChamber[ch])++; | |
257 | // update index of first HitForRec in current chamber | |
258 | // if chamber number different from previous one | |
259 | if (ch != prevch) { | |
260 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
261 | prevch = ch; | |
262 | } | |
263 | } | |
264 | return; | |
265 | } | |
266 | ||
267 | //__________________________________________________________________________ | |
268 | void AliMUONVTrackReconstructor::MakeSegmentsPerStation(Int_t Station) | |
269 | { | |
270 | /// To make the list of segments in station number "Station" (0...) | |
271 | /// from the list of hits to be reconstructed. | |
272 | /// Updates "fNSegments"[Station]. | |
273 | /// Segments in stations 4 and 5 are sorted | |
274 | /// according to increasing absolute value of "impact parameter" | |
275 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; | |
276 | AliMUONSegment *segment; | |
277 | Bool_t last2st; | |
278 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, | |
279 | impactParam = 0., maxImpactParam = 0., minImpactParam = 0.; // =0 to avoid compilation warnings. | |
280 | AliDebug(1,Form("Enter MakeSegmentsPerStation (0...) %d",Station)); | |
281 | // first and second chambers (0...) in the station | |
282 | Int_t ch1 = 2 * Station; | |
283 | Int_t ch2 = ch1 + 1; | |
284 | // variable true for stations downstream of the dipole: | |
285 | // Station(0..4) equal to 3 or 4 | |
286 | if ((Station == 3) || (Station == 4)) { | |
287 | last2st = kTRUE; | |
288 | // maximum impact parameter (cm) according to fMinBendingMomentum... | |
289 | maxImpactParam = | |
290 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); | |
291 | // minimum impact parameter (cm) according to fMaxBendingMomentum... | |
292 | minImpactParam = | |
293 | TMath::Abs(GetImpactParamFromBendingMomentum(fMaxBendingMomentum)); | |
294 | } | |
295 | else last2st = kFALSE; | |
296 | // extrapolation factor from Z of first chamber to Z of second chamber | |
297 | // dZ to be changed to take into account fine structure of chambers ???? | |
298 | Double_t extrapFact; | |
299 | // index for current segment | |
300 | Int_t segmentIndex = 0; | |
301 | // Loop over HitsForRec in the first chamber of the station | |
302 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; | |
303 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
304 | hit1++) { | |
305 | // pointer to the HitForRec | |
306 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
307 | // extrapolation, | |
308 | // on the straight line joining the HitForRec to the vertex (0,0,0), | |
309 | // to the Z of the second chamber of the station | |
310 | // Loop over HitsForRec in the second chamber of the station | |
311 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; | |
312 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; | |
313 | hit2++) { | |
314 | // pointer to the HitForRec | |
315 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
316 | // absolute values of distances, in bending and non bending planes, | |
317 | // between the HitForRec in the second chamber | |
318 | // and the previous extrapolation | |
319 | extrapFact = hit2Ptr->GetZ()/ hit1Ptr->GetZ(); | |
320 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); | |
321 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); | |
322 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); | |
323 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); | |
324 | if (last2st) { | |
325 | // bending slope | |
326 | if ( hit1Ptr->GetZ() - hit2Ptr->GetZ() != 0.0 ) { | |
327 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / | |
328 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); | |
329 | // absolute value of impact parameter | |
330 | impactParam = | |
331 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit1Ptr->GetZ() * bendingSlope); | |
332 | } | |
333 | else { | |
334 | AliWarning("hit1Ptr->GetZ() = hit2Ptr->GetZ(): impactParam set to maxImpactParam"); | |
335 | impactParam = maxImpactParam; | |
336 | } | |
337 | } | |
338 | // check for distances not too large, | |
339 | // and impact parameter not too big if stations downstream of the dipole. | |
340 | // Conditions "distBend" and "impactParam" correlated for these stations ???? | |
341 | if ((distBend < fSegmentMaxDistBending[Station]) && | |
342 | (distNonBend < fSegmentMaxDistNonBending[Station]) && | |
343 | (!last2st || (impactParam < maxImpactParam)) && | |
344 | (!last2st || (impactParam > minImpactParam))) { | |
345 | // make new segment | |
346 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) | |
347 | AliMUONSegment(hit1Ptr, hit2Ptr); | |
348 | // update "link" to this segment from the hit in the first chamber | |
349 | if (hit1Ptr->GetNSegments() == 0) | |
350 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); | |
351 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); | |
352 | if (AliLog::GetGlobalDebugLevel() > 1) { | |
353 | cout << "segmentIndex(0...): " << segmentIndex | |
354 | << " distBend: " << distBend | |
355 | << " distNonBend: " << distNonBend | |
356 | << endl; | |
357 | segment->Dump(); | |
358 | cout << "HitForRec in first chamber" << endl; | |
359 | hit1Ptr->Dump(); | |
360 | cout << "HitForRec in second chamber" << endl; | |
361 | hit2Ptr->Dump(); | |
362 | }; | |
363 | // increment index for current segment | |
364 | segmentIndex++; | |
365 | } | |
366 | } //for (Int_t hit2 | |
367 | } // for (Int_t hit1... | |
368 | fNSegments[Station] = segmentIndex; | |
369 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, | |
370 | // i.e. Station(0..4) 3 or 4, using the function "Compare". | |
371 | // After this sorting, it is impossible to use | |
372 | // the "fNSegments" and "fIndexOfFirstSegment" | |
373 | // of the HitForRec in the first chamber to explore all segments formed with it. | |
374 | // Is this sorting really needed ???? | |
375 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); | |
376 | AliDebug(1,Form("Station: %d NSegments: %d ", Station, fNSegments[Station])); | |
377 | return; | |
378 | } | |
379 | ||
380 | //__________________________________________________________________________ | |
381 | Double_t AliMUONVTrackReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const | |
382 | { | |
383 | /// Returns impact parameter at vertex in bending plane (cm), | |
384 | /// from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), | |
385 | /// using simple values for dipole magnetic field. | |
386 | /// The sign of "BendingMomentum" is the sign of the charge. | |
387 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / | |
388 | BendingMomentum); | |
389 | } | |
390 | ||
391 | //__________________________________________________________________________ | |
392 | Double_t AliMUONVTrackReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) const | |
393 | { | |
394 | /// Returns signed bending momentum in bending plane (GeV/c), | |
395 | /// the sign being the sign of the charge for particles moving forward in Z, | |
396 | /// from the impact parameter "ImpactParam" at vertex in bending plane (cm), | |
397 | /// using simple values for dipole magnetic field. | |
398 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / | |
399 | ImpactParam); | |
400 | } | |
401 | ||
402 | //__________________________________________________________________________ | |
403 | void AliMUONVTrackReconstructor::ValidateTracksWithTrigger(void) | |
404 | { | |
405 | /// Try to match track from tracking system with trigger track | |
406 | AliMUONTrack *track; | |
407 | AliMUONTrackParam trackParam; | |
408 | AliMUONTriggerTrack *triggerTrack; | |
409 | ||
410 | fMUONData->SetTreeAddress("RL"); | |
411 | fMUONData->GetRecTriggerTracks(); | |
412 | TClonesArray *recTriggerTracks = fMUONData->RecTriggerTracks(); | |
413 | ||
414 | Bool_t matchTrigger; | |
415 | Double_t distSigma[3]={1,1,0.02}; // sigma of distributions (trigger-track) X,Y,slopeY | |
416 | Double_t distTriggerTrack[3]; | |
417 | Double_t chi2MatchTrigger, xTrack, yTrack, ySlopeTrack, dTrigTrackMin2, dTrigTrack2 = 0.; | |
418 | ||
419 | track = (AliMUONTrack*) fRecTracksPtr->First(); | |
420 | while (track) { | |
421 | matchTrigger = kFALSE; | |
422 | chi2MatchTrigger = 0.; | |
423 | ||
424 | trackParam = *((AliMUONTrackParam*) (track->GetTrackParamAtHit()->Last())); | |
37827b29 | 425 | AliMUONTrackExtrap::ExtrapToZ(&trackParam, AliMUONConstants::DefaultChamberZ(10)); // extrap to 1st trigger chamber |
8d0843c6 | 426 | |
427 | xTrack = trackParam.GetNonBendingCoor(); | |
428 | yTrack = trackParam.GetBendingCoor(); | |
429 | ySlopeTrack = trackParam.GetBendingSlope(); | |
430 | dTrigTrackMin2 = 999.; | |
431 | ||
432 | triggerTrack = (AliMUONTriggerTrack*) recTriggerTracks->First(); | |
433 | while(triggerTrack){ | |
434 | distTriggerTrack[0] = (triggerTrack->GetX11()-xTrack)/distSigma[0]; | |
435 | distTriggerTrack[1] = (triggerTrack->GetY11()-yTrack)/distSigma[1]; | |
436 | distTriggerTrack[2] = (TMath::Tan(triggerTrack->GetThetay())-ySlopeTrack)/distSigma[2]; | |
437 | dTrigTrack2 = 0.; | |
438 | for (Int_t iVar = 0; iVar < 3; iVar++) dTrigTrack2 += distTriggerTrack[iVar]*distTriggerTrack[iVar]; | |
439 | if (dTrigTrack2 < dTrigTrackMin2 && dTrigTrack2 < fMaxSigma2Distance) { | |
440 | dTrigTrackMin2 = dTrigTrack2; | |
441 | matchTrigger = kTRUE; | |
442 | chi2MatchTrigger = dTrigTrack2/3.; // Normalized Chi2, 3 variables (X,Y,slopeY) | |
443 | } | |
444 | triggerTrack = (AliMUONTriggerTrack*) recTriggerTracks->After(triggerTrack); | |
445 | } | |
446 | ||
447 | track->SetMatchTrigger(matchTrigger); | |
448 | track->SetChi2MatchTrigger(chi2MatchTrigger); | |
449 | ||
450 | track = (AliMUONTrack*) fRecTracksPtr->After(track); | |
451 | } | |
452 | ||
453 | return; | |
454 | } | |
455 | ||
456 | //__________________________________________________________________________ | |
457 | void AliMUONVTrackReconstructor::EventReconstructTrigger(void) | |
458 | { | |
459 | /// To reconstruct trigger for one event | |
460 | AliDebug(1,"Enter EventReconstructTrigger"); | |
461 | MakeTriggerTracks(); | |
462 | return; | |
463 | } | |
464 | ||
465 | //__________________________________________________________________________ | |
466 | Bool_t AliMUONVTrackReconstructor::MakeTriggerTracks(void) | |
467 | { | |
468 | // To make the trigger tracks from Local Trigger | |
469 | AliDebug(1, "Enter MakeTriggerTracks"); | |
e6b25a6e | 470 | |
471 | TTree* treeR; | |
472 | Int_t nTRentries; | |
473 | UChar_t gloTrigPat; | |
474 | TClonesArray *localTrigger; | |
475 | TClonesArray *globalTrigger; | |
476 | AliMUONLocalTrigger *locTrg; | |
477 | AliMUONGlobalTrigger *gloTrg; | |
478 | ||
479 | treeR = fMUONData->TreeR(); | |
480 | if (!treeR) { | |
481 | AliWarning("TreeR is not loaded"); | |
482 | return kFALSE; | |
483 | } | |
484 | ||
485 | nTRentries = Int_t(treeR->GetEntries()); | |
8d0843c6 | 486 | |
e6b25a6e | 487 | treeR->GetEvent(0); // only one entry |
8d0843c6 | 488 | |
e6b25a6e | 489 | if (!(fMUONData->IsTriggerBranchesInTree())) { |
490 | AliWarning(Form("Trigger information is not avalaible, nTRentries = %d not equal to 1",nTRentries)); | |
491 | return kFALSE; | |
492 | } | |
8d0843c6 | 493 | |
e6b25a6e | 494 | fMUONData->SetTreeAddress("TC"); |
495 | fMUONData->GetTrigger(); | |
8d0843c6 | 496 | |
e6b25a6e | 497 | // global trigger for trigger pattern |
498 | gloTrigPat = 0; | |
499 | globalTrigger = fMUONData->GlobalTrigger(); | |
500 | gloTrg = (AliMUONGlobalTrigger*)globalTrigger->UncheckedAt(0); | |
8d0843c6 | 501 | |
e6b25a6e | 502 | if (gloTrg) |
503 | gloTrigPat = gloTrg->GetGlobalResponse(); | |
504 | ||
505 | ||
506 | // local trigger for tracking | |
507 | localTrigger = fMUONData->LocalTrigger(); | |
508 | Int_t nlocals = (Int_t) (localTrigger->GetEntries()); | |
8d0843c6 | 509 | |
e6b25a6e | 510 | Float_t z11 = AliMUONConstants::DefaultChamberZ(10); |
511 | Float_t z21 = AliMUONConstants::DefaultChamberZ(12); | |
512 | ||
513 | Float_t y11 = 0.; | |
514 | Int_t stripX21 = 0; | |
515 | Float_t y21 = 0.; | |
516 | Float_t x11 = 0.; | |
517 | ||
518 | for (Int_t i=0; i<nlocals; i++) { // loop on Local Trigger | |
519 | locTrg = (AliMUONLocalTrigger*)localTrigger->UncheckedAt(i); | |
520 | ||
521 | AliDebug(1, "AliMUONTrackReconstructor::MakeTriggerTrack using NEW trigger \n"); | |
522 | AliMUONTriggerCircuit* circuit = | |
523 | (AliMUONTriggerCircuit*)fTriggerCircuit->At(locTrg->LoCircuit()-1); // -1 !!! | |
524 | ||
525 | y11 = circuit->GetY11Pos(locTrg->LoStripX()); | |
526 | stripX21 = locTrg->LoStripX()+locTrg->LoDev()+1; | |
527 | y21 = circuit->GetY21Pos(stripX21); | |
528 | x11 = circuit->GetX11Pos(locTrg->LoStripY()); | |
529 | ||
530 | AliDebug(1, Form(" MakeTriggerTrack %d %d %d %d %d %f %f %f \n",i,locTrg->LoCircuit(), | |
531 | locTrg->LoStripX(),locTrg->LoStripX()+locTrg->LoDev()+1,locTrg->LoStripY(),y11, y21, x11)); | |
532 | ||
533 | Float_t thetax = TMath::ATan2( x11 , z11 ); | |
534 | Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) ); | |
535 | ||
536 | fTriggerTrack->SetX11(x11); | |
537 | fTriggerTrack->SetY11(y11); | |
538 | fTriggerTrack->SetThetax(thetax); | |
539 | fTriggerTrack->SetThetay(thetay); | |
540 | fTriggerTrack->SetGTPattern(gloTrigPat); | |
541 | ||
542 | fMUONData->AddRecTriggerTrack(*fTriggerTrack); | |
543 | } // end of loop on Local Trigger | |
544 | ||
545 | return kTRUE; | |
8d0843c6 | 546 | } |
547 | ||
548 | //__________________________________________________________________________ | |
549 | void AliMUONVTrackReconstructor::EventDumpTrigger(void) | |
550 | { | |
551 | /// Dump reconstructed trigger event | |
552 | /// and the particle parameters | |
553 | AliMUONTriggerTrack *triggertrack ; | |
554 | Int_t nTriggerTracks = fMUONData->RecTriggerTracks()->GetEntriesFast(); | |
555 | ||
556 | AliDebug(1, "****** enter EventDumpTrigger ******"); | |
557 | AliDebug(1, Form("Number of Reconstructed tracks : %d ", nTriggerTracks)); | |
558 | ||
559 | // Loop over reconstructed tracks | |
560 | for (Int_t trackIndex = 0; trackIndex < nTriggerTracks; trackIndex++) { | |
561 | triggertrack = (AliMUONTriggerTrack*)fMUONData->RecTriggerTracks()->At(trackIndex); | |
562 | printf(" trigger track number %i x11=%f y11=%f thetax=%f thetay=%f \n", | |
563 | trackIndex, | |
564 | triggertrack->GetX11(),triggertrack->GetY11(), | |
565 | triggertrack->GetThetax(),triggertrack->GetThetay()); | |
566 | } | |
567 | } | |
568 |