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a9e2aefa | 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 | /* | |
17 | $Log$ | |
d82671a0 | 18 | Revision 1.5 2000/06/30 10:15:48 gosset |
19 | Changes to EventReconstructor...: | |
20 | precision fit with multiple Coulomb scattering; | |
21 | extrapolation to vertex with Branson correction in absorber (JPC) | |
22 | ||
04b5ea16 | 23 | Revision 1.4 2000/06/27 14:11:36 gosset |
24 | Corrections against violations of coding conventions | |
25 | ||
9cbdf048 | 26 | Revision 1.3 2000/06/16 07:27:08 gosset |
27 | To remove problem in running RuleChecker, like in MUON-dev | |
28 | ||
79e1e601 | 29 | Revision 1.1.2.5 2000/06/16 07:00:26 gosset |
30 | To remove problem in running RuleChecker | |
31 | ||
a9e2aefa | 32 | Revision 1.1.2.4 2000/06/12 08:00:07 morsch |
33 | Dummy streamer to solve CINT compilation problem (to be investigated !) | |
34 | ||
35 | Revision 1.1.2.3 2000/06/09 20:59:57 morsch | |
36 | Make includes consistent with new file structure. | |
37 | ||
38 | Revision 1.1.2.2 2000/06/09 12:58:05 gosset | |
39 | Removed comment beginnings in Log sections of .cxx files | |
40 | Suppressed most violations of coding rules | |
41 | ||
42 | Revision 1.1.2.1 2000/06/07 14:44:53 gosset | |
43 | Addition of files for track reconstruction in C++ | |
44 | */ | |
45 | ||
46 | //__________________________________________________________________________ | |
47 | // | |
48 | // MUON event reconstructor in ALICE | |
49 | // | |
50 | // This class contains as data: | |
51 | // * the parameters for the event reconstruction | |
52 | // * a pointer to the array of hits to be reconstructed (the event) | |
53 | // * a pointer to the array of segments made with these hits inside each station | |
54 | // * a pointer to the array of reconstructed tracks | |
55 | // | |
56 | // It contains as methods, among others: | |
57 | // * MakeEventToBeReconstructed to build the array of hits to be reconstructed | |
58 | // * MakeSegments to build the segments | |
59 | // * MakeTracks to build the tracks | |
60 | //__________________________________________________________________________ | |
61 | ||
62 | #include <iostream.h> | |
63 | ||
64 | #include <TRandom.h> | |
65 | #include <TFile.h> | |
66 | ||
67 | #include "AliCallf77.h" | |
68 | #include "AliMUONEventReconstructor.h" | |
69 | #include "AliMUON.h" | |
70 | #include "AliMUONHitForRec.h" | |
71 | #include "AliMUONSegment.h" | |
72 | #include "AliMUONHit.h" | |
73 | #include "AliMUONRawCluster.h" | |
74 | #include "AliMUONTrack.h" | |
75 | #include "AliMUONChamber.h" | |
76 | #include "AliMUONTrackHit.h" | |
77 | #include "AliRun.h" | |
04b5ea16 | 78 | #include "TParticle.h" |
a9e2aefa | 79 | |
80 | #ifndef WIN32 | |
81 | # define initfield initfield_ | |
82 | # define reco_gufld reco_gufld_ | |
83 | #else | |
84 | # define initfield INITFIELD | |
85 | # define reco_gufld RECO_GUFLD | |
86 | #endif | |
87 | ||
88 | extern "C" | |
89 | { | |
90 | void type_of_call initfield(); | |
91 | void type_of_call reco_gufld(Double_t *Coor, Double_t *Field); | |
92 | } | |
93 | ||
94 | //************* Defaults parameters for reconstruction | |
9cbdf048 | 95 | static const Double_t kDefaultMinBendingMomentum = 3.0; |
96 | static const Double_t kDefaultMaxSigma2Distance = 16.0; | |
97 | static const Double_t kDefaultBendingResolution = 0.01; | |
98 | static const Double_t kDefaultNonBendingResolution = 0.144; | |
99 | static const Double_t kDefaultChamberThicknessInX0 = 0.03; | |
a9e2aefa | 100 | // Simple magnetic field: |
101 | // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG | |
102 | // Length and Position from reco_muon.F, with opposite sign: | |
103 | // Length = ZMAGEND-ZCOIL | |
104 | // Position = (ZMAGEND+ZCOIL)/2 | |
105 | // to be ajusted differently from real magnetic field ???? | |
9cbdf048 | 106 | static const Double_t kDefaultSimpleBValue = 7.0; |
107 | static const Double_t kDefaultSimpleBLength = 428.0; | |
108 | static const Double_t kDefaultSimpleBPosition = 1019.0; | |
109 | static const Int_t kDefaultRecGeantHits = 0; | |
110 | static const Double_t kDefaultEfficiency = 0.95; | |
a9e2aefa | 111 | |
9cbdf048 | 112 | static const Int_t kDefaultPrintLevel = 0; |
a9e2aefa | 113 | |
114 | ClassImp(AliMUONEventReconstructor) // Class implementation in ROOT context | |
115 | ||
116 | //__________________________________________________________________________ | |
117 | AliMUONEventReconstructor::AliMUONEventReconstructor(void) | |
118 | { | |
119 | // Constructor for class AliMUONEventReconstructor | |
120 | SetReconstructionParametersToDefaults(); | |
121 | // Memory allocation for the TClonesArray of hits for reconstruction | |
122 | // Is 10000 the right size ???? | |
123 | fHitsForRecPtr = new TClonesArray("AliMUONHitForRec", 10000); | |
124 | fNHitsForRec = 0; // really needed or GetEntriesFast sufficient ???? | |
125 | // Memory allocation for the TClonesArray's of segments in stations | |
126 | // Is 2000 the right size ???? | |
9cbdf048 | 127 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 128 | fSegmentsPtr[st] = new TClonesArray("AliMUONSegment", 2000); |
129 | fNSegments[st] = 0; // really needed or GetEntriesFast sufficient ???? | |
130 | } | |
131 | // Memory allocation for the TClonesArray of reconstructed tracks | |
132 | // Is 10 the right size ???? | |
133 | fRecTracksPtr = new TClonesArray("AliMUONTrack", 10); | |
134 | fNRecTracks = 0; // really needed or GetEntriesFast sufficient ???? | |
135 | ||
136 | // Initialize magnetic field | |
137 | // using Fortran subroutine INITFIELD in "reco_muon.F". | |
138 | // Should rather use AliMagF ???? and remove prototyping ... | |
139 | initfield(); | |
140 | // Impression de quelques valeurs | |
141 | Double_t coor[3], field[3]; | |
142 | coor[0] = 50.0; | |
143 | coor[1] = 50.0; | |
144 | coor[2] = 950.0; | |
145 | reco_gufld(coor, field); | |
146 | cout << "coor: " << coor[0] << ", " << coor[1] << ", " << coor[2] << endl; | |
147 | cout << "field: " << field[0] << ", " << field[1] << ", " << field[2] << endl; | |
148 | coor[2] = -950.0; | |
149 | reco_gufld(coor, field); | |
150 | cout << "coor: " << coor[0] << ", " << coor[1] << ", " << coor[2] << endl; | |
151 | cout << "field: " << field[0] << ", " << field[1] << ", " << field[2] << endl; | |
152 | coor[2] = -950.0; | |
153 | ||
154 | if (fPrintLevel >= 0) { | |
155 | cout << "AliMUONEventReconstructor constructed with defaults" << endl; Dump();} | |
156 | return; | |
157 | } | |
158 | ||
9cbdf048 | 159 | AliMUONEventReconstructor::AliMUONEventReconstructor (const AliMUONEventReconstructor& Reconstructor) |
160 | { | |
161 | // Dummy copy constructor | |
162 | } | |
163 | ||
164 | AliMUONEventReconstructor & AliMUONEventReconstructor::operator=(const AliMUONEventReconstructor& Reconstructor) | |
165 | { | |
166 | // Dummy assignment operator | |
167 | return *this; | |
168 | } | |
169 | ||
a9e2aefa | 170 | //__________________________________________________________________________ |
171 | AliMUONEventReconstructor::~AliMUONEventReconstructor(void) | |
172 | { | |
173 | // Destructor for class AliMUONEventReconstructor | |
174 | delete fHitsForRecPtr; // Correct destruction of everything ???? or delete [] ???? | |
9cbdf048 | 175 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 176 | delete fSegmentsPtr[st]; // Correct destruction of everything ???? |
177 | return; | |
178 | } | |
179 | ||
180 | //__________________________________________________________________________ | |
181 | void AliMUONEventReconstructor::SetReconstructionParametersToDefaults(void) | |
182 | { | |
183 | // Set reconstruction parameters to default values | |
184 | // Would be much more convenient with a structure (or class) ???? | |
9cbdf048 | 185 | fMinBendingMomentum = kDefaultMinBendingMomentum; |
186 | fMaxSigma2Distance = kDefaultMaxSigma2Distance; | |
a9e2aefa | 187 | |
9cbdf048 | 188 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); |
a9e2aefa | 189 | // ******** Parameters for making HitsForRec |
190 | // minimum radius, | |
191 | // like in TRACKF_STAT: | |
192 | // 2 degrees for stations 1 and 2, or ch(0...) from 0 to 3; | |
193 | // 30 cm for stations 3 to 5, or ch(0...) from 4 to 9 | |
9cbdf048 | 194 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
195 | if (ch < 4) fRMin[ch] = TMath::Abs((&(pMUON->Chamber(ch)))->Z()) * | |
a9e2aefa | 196 | 2.0 * TMath::Pi() / 180.0; |
197 | else fRMin[ch] = 30.0; | |
198 | } | |
199 | // maximum radius | |
200 | // like in TRACKF_STAT (10 degrees ????) | |
201 | fRMax[0] = fRMax[1] = 91.5; | |
202 | fRMax[2] = fRMax[3] = 122.5; | |
203 | fRMax[4] = fRMax[5] = 158.3; | |
204 | fRMax[6] = fRMax[7] = 260.0; | |
205 | fRMax[8] = fRMax[9] = 260.0; | |
206 | ||
207 | // ******** Parameters for making segments | |
208 | // should be parametrized ???? | |
209 | // according to interval between chambers in a station ???? | |
210 | // Maximum distance in non bending plane | |
211 | // 5 * 0.22 just to remember the way it was made in TRACKF_STAT | |
212 | // SIGCUT*DYMAX(IZ) | |
9cbdf048 | 213 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 214 | fSegmentMaxDistNonBending[st] = 5. * 0.22; |
215 | // Maximum distance in bending plane | |
216 | // values from TRACKF_STAT corresponding to (J psi 20cm) | |
217 | fSegmentMaxDistBending[0] = 1.5; | |
218 | fSegmentMaxDistBending[1] = 1.5; | |
219 | fSegmentMaxDistBending[2] = 3.0; | |
220 | fSegmentMaxDistBending[3] = 6.0; | |
221 | fSegmentMaxDistBending[4] = 6.0; | |
222 | ||
9cbdf048 | 223 | fBendingResolution = kDefaultBendingResolution; |
224 | fNonBendingResolution = kDefaultNonBendingResolution; | |
225 | fChamberThicknessInX0 = kDefaultChamberThicknessInX0; | |
226 | fSimpleBValue = kDefaultSimpleBValue; | |
227 | fSimpleBLength = kDefaultSimpleBLength; | |
228 | fSimpleBPosition = kDefaultSimpleBPosition; | |
229 | fRecGeantHits = kDefaultRecGeantHits; | |
230 | fEfficiency = kDefaultEfficiency; | |
231 | fPrintLevel = kDefaultPrintLevel; | |
a9e2aefa | 232 | return; |
233 | } | |
234 | ||
235 | //__________________________________________________________________________ | |
236 | Double_t AliMUONEventReconstructor::GetImpactParamFromBendingMomentum(Double_t BendingMomentum) | |
237 | { | |
238 | // Returns impact parameter at vertex in bending plane (cm), | |
239 | // from the signed bending momentum "BendingMomentum" in bending plane (GeV/c), | |
240 | // using simple values for dipole magnetic field. | |
241 | // The sign is the sign of the charge. | |
242 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / | |
243 | BendingMomentum); | |
244 | } | |
245 | ||
246 | //__________________________________________________________________________ | |
247 | Double_t AliMUONEventReconstructor::GetBendingMomentumFromImpactParam(Double_t ImpactParam) | |
248 | { | |
249 | // Returns signed bending momentum in bending plane (GeV/c), | |
250 | // from the impact parameter "ImpactParam" at vertex in bending plane (cm), | |
251 | // using simple values for dipole magnetic field. | |
252 | // The sign is the sign of the charge. | |
253 | return (-0.0003 * fSimpleBValue * fSimpleBLength * fSimpleBPosition / | |
254 | ImpactParam); | |
255 | } | |
256 | ||
257 | //__________________________________________________________________________ | |
258 | void AliMUONEventReconstructor::SetBkgGeantFile(Text_t *BkgGeantFileName) | |
259 | { | |
260 | // Set background file ... for GEANT hits | |
261 | // Must be called after having loaded the firts signal event | |
262 | if (fPrintLevel >= 0) { | |
263 | cout << "Enter SetBkgGeantFile with BkgGeantFileName ``" | |
264 | << BkgGeantFileName << "''" << endl;} | |
265 | if (strlen(BkgGeantFileName)) { | |
266 | // BkgGeantFileName not empty: try to open the file | |
267 | if (fPrintLevel >= 2) {cout << "Before File(Bkg)" << endl; gDirectory->Dump();} | |
268 | fBkgGeantFile = new TFile(BkgGeantFileName); | |
269 | if (fPrintLevel >= 2) {cout << "After File(Bkg)" << endl; gDirectory->Dump();} | |
270 | if (fBkgGeantFile-> IsOpen()) { | |
271 | if (fPrintLevel >= 0) { | |
272 | cout << "Background for GEANT hits in file: ``" << BkgGeantFileName | |
273 | << "'' successfully opened" << endl;} | |
274 | } | |
275 | else { | |
276 | cout << "Background for GEANT hits in file: " << BkgGeantFileName << endl; | |
277 | cout << "NOT FOUND: EXIT" << endl; | |
278 | exit(0); // right instruction for exit ???? | |
279 | } | |
280 | // Arrays for "particles" and "hits" | |
281 | fBkgGeantParticles = new TClonesArray("TParticle", 200); | |
282 | fBkgGeantHits = new TClonesArray("AliMUONHit", 2000); | |
283 | // Event number to -1 for initialization | |
284 | fBkgGeantEventNumber = -1; | |
285 | // Back to the signal file: | |
286 | // first signal event must have been loaded previously, | |
287 | // otherwise, Segmentation violation at the next instruction | |
288 | // How is it possible to do smething better ???? | |
289 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
290 | if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();} | |
291 | } | |
292 | return; | |
293 | } | |
294 | ||
295 | //__________________________________________________________________________ | |
296 | void AliMUONEventReconstructor::NextBkgGeantEvent(void) | |
297 | { | |
298 | // Get next event in background file for GEANT hits | |
299 | // Goes back to event number 0 when end of file is reached | |
300 | char treeName[20]; | |
301 | TBranch *branch; | |
302 | if (fPrintLevel >= 0) { | |
303 | cout << "Enter NextBkgGeantEvent" << endl;} | |
304 | // Clean previous event | |
305 | if(fBkgGeantTK) delete fBkgGeantTK; | |
306 | fBkgGeantTK = NULL; | |
307 | if(fBkgGeantParticles) fBkgGeantParticles->Clear(); | |
308 | if(fBkgGeantTH) delete fBkgGeantTH; | |
309 | fBkgGeantTH = NULL; | |
310 | if(fBkgGeantHits) fBkgGeantHits->Clear(); | |
311 | // Increment event number | |
312 | fBkgGeantEventNumber++; | |
313 | // Get access to Particles and Hits for event from background file | |
314 | if (fPrintLevel >= 2) {cout << "Before cd(Bkg)" << endl; gDirectory->Dump();} | |
315 | fBkgGeantFile->cd(); | |
316 | if (fPrintLevel >= 2) {cout << "After cd(Bkg)" << endl; gDirectory->Dump();} | |
317 | // Particles: TreeK for event and branch "Particles" | |
318 | sprintf(treeName, "TreeK%d", fBkgGeantEventNumber); | |
319 | fBkgGeantTK = (TTree*)gDirectory->Get(treeName); | |
320 | if (!fBkgGeantTK) { | |
321 | if (fPrintLevel >= 0) { | |
322 | cout << "Cannot find Kine Tree for background event: " << | |
323 | fBkgGeantEventNumber << endl; | |
324 | cout << "Goes back to event 0" << endl; | |
325 | } | |
326 | fBkgGeantEventNumber = 0; | |
327 | sprintf(treeName, "TreeK%d", fBkgGeantEventNumber); | |
328 | fBkgGeantTK = (TTree*)gDirectory->Get(treeName); | |
329 | if (!fBkgGeantTK) { | |
330 | cout << "ERROR: cannot find Kine Tree for background event: " << | |
331 | fBkgGeantEventNumber << endl; | |
332 | exit(0); | |
333 | } | |
334 | } | |
335 | if (fBkgGeantTK) | |
336 | fBkgGeantTK->SetBranchAddress("Particles", &fBkgGeantParticles); | |
337 | fBkgGeantTK->GetEvent(0); // why event 0 ???? necessary ???? | |
338 | // Hits: TreeH for event and branch "MUON" | |
339 | sprintf(treeName, "TreeH%d", fBkgGeantEventNumber); | |
340 | fBkgGeantTH = (TTree*)gDirectory->Get(treeName); | |
341 | if (!fBkgGeantTH) { | |
342 | cout << "ERROR: cannot find Hits Tree for background event: " << | |
343 | fBkgGeantEventNumber << endl; | |
344 | exit(0); | |
345 | } | |
346 | if (fBkgGeantTH && fBkgGeantHits) { | |
347 | branch = fBkgGeantTH->GetBranch("MUON"); | |
348 | if (branch) branch->SetAddress(&fBkgGeantHits); | |
349 | } | |
350 | fBkgGeantTH->GetEntries(); // necessary ???? | |
351 | // Back to the signal file | |
352 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
353 | if (fPrintLevel >= 2) {cout << "After cd(gAlice)" << endl; gDirectory->Dump();} | |
354 | return; | |
355 | } | |
356 | ||
357 | //__________________________________________________________________________ | |
358 | void AliMUONEventReconstructor::EventReconstruct(void) | |
359 | { | |
360 | // To reconstruct one event | |
361 | if (fPrintLevel >= 1) cout << "enter EventReconstruct" << endl; | |
362 | MakeEventToBeReconstructed(); | |
363 | MakeSegments(); | |
364 | MakeTracks(); | |
365 | return; | |
366 | } | |
367 | ||
368 | //__________________________________________________________________________ | |
369 | void AliMUONEventReconstructor::ResetHitsForRec(void) | |
370 | { | |
371 | // To reset the array and the number of HitsForRec, | |
372 | // and also the number of HitsForRec | |
373 | // and the index of the first HitForRec per chamber | |
374 | if (fHitsForRecPtr) fHitsForRecPtr->Clear(); | |
375 | fNHitsForRec = 0; | |
9cbdf048 | 376 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) |
a9e2aefa | 377 | fNHitsForRecPerChamber[ch] = fIndexOfFirstHitForRecPerChamber[ch] = 0; |
378 | return; | |
379 | } | |
380 | ||
381 | //__________________________________________________________________________ | |
382 | void AliMUONEventReconstructor::ResetSegments(void) | |
383 | { | |
384 | // To reset the TClonesArray of segments and the number of Segments | |
385 | // for all stations | |
9cbdf048 | 386 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 387 | if (fSegmentsPtr[st]) fSegmentsPtr[st]->Clear(); |
388 | fNSegments[st] = 0; | |
389 | } | |
390 | return; | |
391 | } | |
392 | ||
393 | //__________________________________________________________________________ | |
394 | void AliMUONEventReconstructor::ResetTracks(void) | |
395 | { | |
396 | // To reset the TClonesArray of reconstructed tracks | |
397 | if (fRecTracksPtr) fRecTracksPtr->Clear(); | |
398 | fNRecTracks = 0; | |
399 | return; | |
400 | } | |
401 | ||
402 | //__________________________________________________________________________ | |
403 | void AliMUONEventReconstructor::MakeEventToBeReconstructed(void) | |
404 | { | |
405 | // To make the list of hits to be reconstructed, | |
406 | // either from the GEANT hits or from the raw clusters | |
407 | // according to the parameter set for the reconstructor | |
408 | if (fPrintLevel >= 1) cout << "enter MakeEventToBeReconstructed" << endl; | |
409 | ResetHitsForRec(); | |
410 | if (fRecGeantHits == 1) { | |
411 | // Reconstruction from GEANT hits | |
412 | // Back to the signal file | |
413 | ((gAlice->TreeK())->GetCurrentFile())->cd(); | |
414 | // Signal hits | |
415 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
416 | // Security on MUON ???? | |
417 | AddHitsForRecFromGEANT(gAlice->TreeH()); | |
418 | // Background hits | |
419 | AddHitsForRecFromBkgGEANT(fBkgGeantTH, fBkgGeantHits); | |
420 | // Sort HitsForRec in increasing order with respect to chamber number | |
421 | SortHitsForRecWithIncreasingChamber(); | |
422 | } | |
423 | else { | |
424 | // Reconstruction from raw clusters | |
425 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
426 | // Security on MUON ???? | |
427 | // TreeR assumed to be be "prepared" in calling function | |
428 | // by "MUON->GetTreeR(nev)" ???? | |
9cbdf048 | 429 | TTree *treeR = gAlice->TreeR(); |
430 | AddHitsForRecFromRawClusters(treeR); | |
a9e2aefa | 431 | // No sorting: it is done automatically in the previous function |
432 | } | |
433 | if (fPrintLevel >= 10) { | |
434 | cout << "end of MakeEventToBeReconstructed" << endl; | |
435 | cout << "NHitsForRec: " << fNHitsForRec << endl; | |
9cbdf048 | 436 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 437 | cout << "chamber(0...): " << ch |
438 | << " NHitsForRec: " << fNHitsForRecPerChamber[ch] | |
439 | << " index(first HitForRec): " << fIndexOfFirstHitForRecPerChamber[ch] | |
440 | << endl; | |
441 | for (Int_t hit = fIndexOfFirstHitForRecPerChamber[ch]; | |
442 | hit < fIndexOfFirstHitForRecPerChamber[ch] + fNHitsForRecPerChamber[ch]; | |
443 | hit++) { | |
444 | cout << "HitForRec index(0...): " << hit << endl; | |
445 | ((*fHitsForRecPtr)[hit])->Dump(); | |
446 | } | |
447 | } | |
448 | } | |
449 | return; | |
450 | } | |
451 | ||
452 | //__________________________________________________________________________ | |
453 | void AliMUONEventReconstructor::AddHitsForRecFromGEANT(TTree *TH) | |
454 | { | |
455 | // To add to the list of hits for reconstruction | |
456 | // the GEANT signal hits from a hit tree TH. | |
457 | if (fPrintLevel >= 2) | |
458 | cout << "enter AddHitsForRecFromGEANT with TH: " << TH << endl; | |
459 | if (TH == NULL) return; | |
9cbdf048 | 460 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
a9e2aefa | 461 | // Security on MUON ???? |
462 | // See whether it could be the same for signal and background ???? | |
463 | // Loop over tracks in tree | |
464 | Int_t ntracks = (Int_t) TH->GetEntries(); | |
465 | if (fPrintLevel >= 2) | |
466 | cout << "ntracks: " << ntracks << endl; | |
467 | for (Int_t track = 0; track < ntracks; track++) { | |
468 | gAlice->ResetHits(); | |
469 | TH->GetEvent(track); | |
470 | // Loop over hits | |
471 | Int_t hit = 0; | |
9cbdf048 | 472 | for (AliMUONHit* mHit = (AliMUONHit*) pMUON->FirstHit(-1); |
a9e2aefa | 473 | mHit; |
9cbdf048 | 474 | mHit = (AliMUONHit*) pMUON->NextHit(), hit++) { |
a9e2aefa | 475 | NewHitForRecFromGEANT(mHit,track, hit, 1); |
476 | } // end of hit loop | |
477 | } // end of track loop | |
478 | return; | |
479 | } | |
480 | ||
481 | //__________________________________________________________________________ | |
482 | void AliMUONEventReconstructor::AddHitsForRecFromBkgGEANT(TTree *TH, TClonesArray *Hits) | |
483 | { | |
484 | // To add to the list of hits for reconstruction | |
485 | // the GEANT background hits from a hit tree TH and a pointer Hits to a hit list. | |
486 | // How to have only one function "AddHitsForRecFromGEANT" ???? | |
487 | if (fPrintLevel >= 2) | |
488 | cout << "enter AddHitsForRecFromBkgGEANT with TH: " << TH << endl; | |
489 | if (TH == NULL) return; | |
490 | // Loop over tracks in tree | |
491 | Int_t ntracks = (Int_t) TH->GetEntries(); | |
492 | if (fPrintLevel >= 2) | |
493 | cout << "ntracks: " << ntracks << endl; | |
494 | for (Int_t track = 0; track < ntracks; track++) { | |
495 | if (Hits) Hits->Clear(); | |
496 | TH->GetEvent(track); | |
497 | // Loop over hits | |
498 | for (Int_t hit = 0; hit < Hits->GetEntriesFast(); hit++) { | |
499 | NewHitForRecFromGEANT((AliMUONHit*) (*Hits)[hit], track, hit, 0); | |
500 | } // end of hit loop | |
501 | } // end of track loop | |
502 | return; | |
503 | } | |
504 | ||
505 | //__________________________________________________________________________ | |
506 | AliMUONHitForRec* AliMUONEventReconstructor::NewHitForRecFromGEANT(AliMUONHit* Hit, Int_t TrackNumber, Int_t HitNumber, Int_t Signal) | |
507 | { | |
508 | // To make a new hit for reconstruction from a GEANT hit pointed to by "Hit", | |
509 | // with hit number "HitNumber" in the track numbered "TrackNumber", | |
510 | // either from signal ("Signal" = 1) or background ("Signal" = 0) event. | |
511 | // Selects hits in tracking (not trigger) chambers. | |
512 | // Takes into account the efficiency (fEfficiency) | |
513 | // and the smearing from resolution (fBendingResolution and fNonBendingResolution). | |
514 | // Adds a condition on the radius between RMin and RMax | |
515 | // to better simulate the real chambers. | |
516 | // Returns the pointer to the new hit for reconstruction, | |
517 | // or NULL in case of inefficiency or non tracking chamber or bad radius. | |
518 | // No condition on at most 20 cm from a muon from a resonance | |
519 | // like in Fortran TRACKF_STAT. | |
520 | AliMUONHitForRec* hitForRec; | |
521 | Double_t bendCoor, nonBendCoor, radius; | |
522 | Int_t chamber = Hit->fChamber - 1; // chamber(0...) | |
523 | // only in tracking chambers (fChamber starts at 1) | |
9cbdf048 | 524 | if (chamber >= kMaxMuonTrackingChambers) return NULL; |
a9e2aefa | 525 | // only if hit is efficient (keep track for checking ????) |
526 | if (gRandom->Rndm() > fEfficiency) return NULL; | |
527 | // only if radius between RMin and RMax | |
528 | bendCoor = Hit->fY; | |
529 | nonBendCoor = Hit->fX; | |
530 | radius = TMath::Sqrt((bendCoor * bendCoor) + (nonBendCoor * nonBendCoor)); | |
531 | if ((radius < fRMin[chamber]) || (radius > fRMax[chamber])) return NULL; | |
532 | // new AliMUONHitForRec from GEANT hit and increment number of AliMUONHitForRec's | |
533 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(Hit); | |
534 | fNHitsForRec++; | |
535 | // add smearing from resolution | |
536 | hitForRec->SetBendingCoor(bendCoor + gRandom->Gaus(0., fBendingResolution)); | |
537 | hitForRec->SetNonBendingCoor(nonBendCoor | |
538 | + gRandom->Gaus(0., fNonBendingResolution)); | |
539 | // more information into HitForRec | |
540 | // resolution: angular effect to be added here ???? | |
541 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
542 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
543 | // GEANT track info | |
544 | hitForRec->SetHitNumber(HitNumber); | |
545 | hitForRec->SetTHTrack(TrackNumber); | |
546 | hitForRec->SetGeantSignal(Signal); | |
547 | if (fPrintLevel >= 10) { | |
548 | cout << "track: " << TrackNumber << " hit: " << HitNumber << endl; | |
549 | Hit->Dump(); | |
550 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
551 | hitForRec->Dump();} | |
552 | return hitForRec; | |
553 | } | |
554 | ||
555 | //__________________________________________________________________________ | |
556 | void AliMUONEventReconstructor::SortHitsForRecWithIncreasingChamber() | |
557 | { | |
558 | // Sort HitsForRec's in increasing order with respect to chamber number. | |
559 | // Uses the function "Compare". | |
560 | // Update the information for HitsForRec per chamber too. | |
561 | Int_t ch, nhits, prevch; | |
562 | fHitsForRecPtr->Sort(); | |
9cbdf048 | 563 | for (ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 564 | fNHitsForRecPerChamber[ch] = 0; |
565 | fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
566 | } | |
567 | prevch = 0; // previous chamber | |
568 | nhits = 0; // number of hits in current chamber | |
569 | // Loop over HitsForRec | |
570 | for (Int_t hit = 0; hit < fNHitsForRec; hit++) { | |
571 | // chamber number (0...) | |
572 | ch = ((AliMUONHitForRec*) ((*fHitsForRecPtr)[hit]))->GetChamberNumber(); | |
573 | // increment number of hits in current chamber | |
574 | (fNHitsForRecPerChamber[ch])++; | |
575 | // update index of first HitForRec in current chamber | |
576 | // if chamber number different from previous one | |
577 | if (ch != prevch) { | |
578 | fIndexOfFirstHitForRecPerChamber[ch] = hit; | |
579 | prevch = ch; | |
580 | } | |
581 | } | |
582 | return; | |
583 | } | |
584 | ||
585 | // //__________________________________________________________________________ | |
586 | // void AliMUONEventReconstructor::AddHitsForRecFromCathodeCorrelations(TTree* TC) | |
587 | // { | |
588 | // // OLD VERSION WHEN ONE ONE WAS USING SO CALLED CATHODE CORRELATIONS | |
589 | // // To add to the list of hits for reconstruction | |
590 | // // the (cathode correlated) raw clusters | |
591 | // // No condition added, like in Fortran TRACKF_STAT, | |
592 | // // on the radius between RMin and RMax. | |
593 | // AliMUONHitForRec *hitForRec; | |
594 | // if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromCathodeCorrelations" << endl; | |
595 | // AliMUON *MUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? | |
596 | // // Security on MUON ???? | |
597 | // // Loop over tracking chambers | |
9cbdf048 | 598 | // for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 599 | // // number of HitsForRec to 0 for the chamber |
600 | // fNHitsForRecPerChamber[ch] = 0; | |
601 | // // index of first HitForRec for the chamber | |
602 | // if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
603 | // else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
604 | // TClonesArray *reconst_hits = MUON->ReconstHitsAddress(ch); | |
605 | // MUON->ResetReconstHits(); | |
606 | // TC->GetEvent(); | |
607 | // Int_t ncor = (Int_t)reconst_hits->GetEntries(); | |
608 | // // Loop over (cathode correlated) raw clusters | |
609 | // for (Int_t cor = 0; cor < ncor; cor++) { | |
610 | // AliMUONReconstHit * mCor = | |
611 | // (AliMUONReconstHit*) reconst_hits->UncheckedAt(cor); | |
612 | // // new AliMUONHitForRec from (cathode correlated) raw cluster | |
613 | // // and increment number of AliMUONHitForRec's (total and in chamber) | |
614 | // hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(mCor); | |
615 | // fNHitsForRec++; | |
616 | // (fNHitsForRecPerChamber[ch])++; | |
617 | // // more information into HitForRec | |
618 | // hitForRec->SetChamberNumber(ch); | |
619 | // hitForRec->SetHitNumber(cor); | |
620 | // // Z coordinate of the chamber (cm) with sign opposite to GEANT sign | |
621 | // // could (should) be more exact from chamber geometry ???? | |
622 | // hitForRec->SetZ(-(&(MUON->Chamber(ch)))->Z()); | |
623 | // if (fPrintLevel >= 10) { | |
624 | // cout << "chamber (0...): " << ch << | |
625 | // " cathcorrel (0...): " << cor << endl; | |
626 | // mCor->Dump(); | |
627 | // cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
628 | // hitForRec->Dump();} | |
629 | // } // end of cluster loop | |
630 | // } // end of chamber loop | |
631 | // return; | |
632 | // } | |
633 | ||
634 | //__________________________________________________________________________ | |
635 | void AliMUONEventReconstructor::AddHitsForRecFromRawClusters(TTree* TR) | |
636 | { | |
637 | // To add to the list of hits for reconstruction all the raw clusters | |
638 | // No condition added, like in Fortran TRACKF_STAT, | |
639 | // on the radius between RMin and RMax. | |
640 | AliMUONHitForRec *hitForRec; | |
641 | AliMUONRawCluster *clus; | |
642 | Int_t iclus, nclus; | |
643 | TClonesArray *rawclusters; | |
644 | if (fPrintLevel >= 1) cout << "enter AddHitsForRecFromRawClusters" << endl; | |
9cbdf048 | 645 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
a9e2aefa | 646 | // Security on MUON ???? |
647 | // Loop over tracking chambers | |
9cbdf048 | 648 | for (Int_t ch = 0; ch < kMaxMuonTrackingChambers; ch++) { |
a9e2aefa | 649 | // number of HitsForRec to 0 for the chamber |
650 | fNHitsForRecPerChamber[ch] = 0; | |
651 | // index of first HitForRec for the chamber | |
652 | if (ch == 0) fIndexOfFirstHitForRecPerChamber[ch] = 0; | |
653 | else fIndexOfFirstHitForRecPerChamber[ch] = fNHitsForRec; | |
9cbdf048 | 654 | rawclusters = pMUON->RawClustAddress(ch); |
655 | pMUON->ResetRawClusters(); | |
a9e2aefa | 656 | TR->GetEvent((Int_t) (TR->GetEntries()) - 1); // to be checked ???? |
657 | nclus = (Int_t) (rawclusters->GetEntries()); | |
658 | // Loop over (cathode correlated) raw clusters | |
659 | for (iclus = 0; iclus < nclus; iclus++) { | |
660 | clus = (AliMUONRawCluster*) rawclusters->UncheckedAt(iclus); | |
661 | // new AliMUONHitForRec from raw cluster | |
662 | // and increment number of AliMUONHitForRec's (total and in chamber) | |
663 | hitForRec = new ((*fHitsForRecPtr)[fNHitsForRec]) AliMUONHitForRec(clus); | |
664 | fNHitsForRec++; | |
665 | (fNHitsForRecPerChamber[ch])++; | |
666 | // more information into HitForRec | |
667 | // resolution: info should be already in raw cluster and taken from it ???? | |
668 | hitForRec->SetBendingReso2(fBendingResolution * fBendingResolution); | |
669 | hitForRec->SetNonBendingReso2(fNonBendingResolution * fNonBendingResolution); | |
670 | // original raw cluster | |
671 | hitForRec->SetChamberNumber(ch); | |
672 | hitForRec->SetHitNumber(iclus); | |
673 | // Z coordinate of the chamber (cm) with sign opposite to GEANT sign | |
674 | // could (should) be more exact from chamber geometry ???? | |
9cbdf048 | 675 | hitForRec->SetZ(-(&(pMUON->Chamber(ch)))->Z()); |
a9e2aefa | 676 | if (fPrintLevel >= 10) { |
677 | cout << "chamber (0...): " << ch << | |
678 | " raw cluster (0...): " << iclus << endl; | |
679 | clus->Dump(); | |
680 | cout << "AliMUONHitForRec number (1...): " << fNHitsForRec << endl; | |
681 | hitForRec->Dump();} | |
682 | } // end of cluster loop | |
683 | } // end of chamber loop | |
684 | return; | |
685 | } | |
686 | ||
687 | //__________________________________________________________________________ | |
688 | void AliMUONEventReconstructor::MakeSegments(void) | |
689 | { | |
690 | // To make the list of segments in all stations, | |
691 | // from the list of hits to be reconstructed | |
692 | if (fPrintLevel >= 1) cout << "enter MakeSegments" << endl; | |
693 | ResetSegments(); | |
694 | // Loop over stations | |
9cbdf048 | 695 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) |
a9e2aefa | 696 | MakeSegmentsPerStation(st); |
697 | if (fPrintLevel >= 10) { | |
698 | cout << "end of MakeSegments" << endl; | |
9cbdf048 | 699 | for (Int_t st = 0; st < kMaxMuonTrackingStations; st++) { |
a9e2aefa | 700 | cout << "station(0...): " << st |
701 | << " Segments: " << fNSegments[st] | |
702 | << endl; | |
703 | for (Int_t seg = 0; | |
704 | seg < fNSegments[st]; | |
705 | seg++) { | |
706 | cout << "Segment index(0...): " << seg << endl; | |
707 | ((*fSegmentsPtr[st])[seg])->Dump(); | |
708 | } | |
709 | } | |
710 | } | |
711 | return; | |
712 | } | |
713 | ||
714 | //__________________________________________________________________________ | |
715 | void AliMUONEventReconstructor::MakeSegmentsPerStation(Int_t Station) | |
716 | { | |
717 | // To make the list of segments in station number "Station" (0...) | |
718 | // from the list of hits to be reconstructed. | |
719 | // Updates "fNSegments"[Station]. | |
720 | // Segments in stations 4 and 5 are sorted | |
721 | // according to increasing absolute value of "impact parameter" | |
722 | AliMUONHitForRec *hit1Ptr, *hit2Ptr; | |
723 | AliMUONSegment *segment; | |
724 | Bool_t last2st; | |
725 | Double_t bendingSlope, distBend, distNonBend, extBendCoor, extNonBendCoor, | |
726 | impactParam, maxImpactParam; | |
9cbdf048 | 727 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
a9e2aefa | 728 | if (fPrintLevel >= 1) |
729 | cout << "enter MakeSegmentsPerStation (0...) " << Station << endl; | |
730 | // first and second chambers (0...) in the station | |
731 | Int_t ch1 = 2 * Station; | |
732 | Int_t ch2 = ch1 + 1; | |
733 | // variable true for stations downstream of the dipole: | |
734 | // Station(0..4) equal to 3 or 4 | |
735 | if ((Station == 3) || (Station == 4)) { | |
736 | last2st = kTRUE; | |
737 | // maximum impact parameter (cm) according to fMinBendingMomentum... | |
738 | maxImpactParam = | |
739 | TMath::Abs(GetImpactParamFromBendingMomentum(fMinBendingMomentum)); | |
740 | } | |
741 | else last2st = kFALSE; | |
742 | // extrapolation factor from Z of first chamber to Z of second chamber | |
743 | // dZ to be changed to take into account fine structure of chambers ???? | |
744 | Double_t extrapFact = | |
9cbdf048 | 745 | (&(pMUON->Chamber(ch2)))->Z() / (&(pMUON->Chamber(ch1)))->Z(); |
a9e2aefa | 746 | // index for current segment |
747 | Int_t segmentIndex = 0; | |
748 | // Loop over HitsForRec in the first chamber of the station | |
749 | for (Int_t hit1 = fIndexOfFirstHitForRecPerChamber[ch1]; | |
750 | hit1 < fIndexOfFirstHitForRecPerChamber[ch1] + fNHitsForRecPerChamber[ch1]; | |
751 | hit1++) { | |
752 | // pointer to the HitForRec | |
753 | hit1Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit1]); | |
754 | // extrapolation, | |
755 | // on the straight line joining the HitForRec to the vertex (0,0,0), | |
756 | // to the Z of the second chamber of the station | |
757 | extBendCoor = extrapFact * hit1Ptr->GetBendingCoor(); | |
758 | extNonBendCoor = extrapFact * hit1Ptr->GetNonBendingCoor(); | |
759 | // Loop over HitsForRec in the second chamber of the station | |
760 | for (Int_t hit2 = fIndexOfFirstHitForRecPerChamber[ch2]; | |
761 | hit2 < fIndexOfFirstHitForRecPerChamber[ch2] + fNHitsForRecPerChamber[ch2]; | |
762 | hit2++) { | |
763 | // pointer to the HitForRec | |
764 | hit2Ptr = (AliMUONHitForRec*) ((*fHitsForRecPtr)[hit2]); | |
765 | // absolute values of distances, in bending and non bending planes, | |
766 | // between the HitForRec in the second chamber | |
767 | // and the previous extrapolation | |
768 | distBend = TMath::Abs(hit2Ptr->GetBendingCoor() - extBendCoor); | |
769 | distNonBend = TMath::Abs(hit2Ptr->GetNonBendingCoor() - extNonBendCoor); | |
770 | if (last2st) { | |
771 | // bending slope | |
772 | bendingSlope = (hit1Ptr->GetBendingCoor() - hit2Ptr->GetBendingCoor()) / | |
773 | (hit1Ptr->GetZ() - hit2Ptr->GetZ()); | |
774 | // absolute value of impact parameter | |
775 | impactParam = | |
776 | TMath::Abs(hit1Ptr->GetBendingCoor() - hit2Ptr->GetZ() * bendingSlope); | |
777 | } | |
778 | // check for distances not too large, | |
779 | // and impact parameter not too big if stations downstream of the dipole. | |
780 | // Conditions "distBend" and "impactParam" correlated for these stations ???? | |
781 | if ((distBend < fSegmentMaxDistBending[Station]) && | |
782 | (distNonBend < fSegmentMaxDistNonBending[Station]) && | |
783 | (!last2st || (impactParam < maxImpactParam))) { | |
784 | // make new segment | |
785 | segment = new ((*fSegmentsPtr[Station])[segmentIndex]) | |
786 | AliMUONSegment(hit1Ptr, hit2Ptr); | |
787 | // update "link" to this segment from the hit in the first chamber | |
788 | if (hit1Ptr->GetNSegments() == 0) | |
789 | hit1Ptr->SetIndexOfFirstSegment(segmentIndex); | |
790 | hit1Ptr->SetNSegments(hit1Ptr->GetNSegments() + 1); | |
791 | if (fPrintLevel >= 10) { | |
792 | cout << "segmentIndex(0...): " << segmentIndex | |
793 | << " distBend: " << distBend | |
794 | << " distNonBend: " << distNonBend | |
795 | << endl; | |
796 | segment->Dump(); | |
797 | cout << "HitForRec in first chamber" << endl; | |
798 | hit1Ptr->Dump(); | |
799 | cout << "HitForRec in second chamber" << endl; | |
800 | hit2Ptr->Dump(); | |
801 | }; | |
802 | // increment index for current segment | |
803 | segmentIndex++; | |
804 | } | |
805 | } //for (Int_t hit2 | |
806 | } // for (Int_t hit1... | |
807 | fNSegments[Station] = segmentIndex; | |
808 | // Sorting according to "impact parameter" if station(1..5) 4 or 5, | |
809 | // i.e. Station(0..4) 3 or 4, using the function "Compare". | |
810 | // After this sorting, it is impossible to use | |
811 | // the "fNSegments" and "fIndexOfFirstSegment" | |
812 | // of the HitForRec in the first chamber to explore all segments formed with it. | |
813 | // Is this sorting really needed ???? | |
814 | if ((Station == 3) || (Station == 4)) (fSegmentsPtr[Station])->Sort(); | |
815 | if (fPrintLevel >= 1) cout << "Station: " << Station << " NSegments: " | |
816 | << fNSegments[Station] << endl; | |
817 | return; | |
818 | } | |
819 | ||
820 | //__________________________________________________________________________ | |
821 | void AliMUONEventReconstructor::MakeTracks(void) | |
822 | { | |
823 | // To make the tracks, | |
824 | // from the list of segments and points in all stations | |
825 | if (fPrintLevel >= 1) cout << "enter MakeTracks" << endl; | |
826 | ResetTracks(); | |
827 | // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5 | |
828 | MakeTrackCandidates(); | |
829 | // Follow tracks in stations(1..) 3, 2 and 1 | |
830 | FollowTracks(); | |
831 | return; | |
832 | } | |
833 | ||
834 | //__________________________________________________________________________ | |
835 | Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment) | |
836 | { | |
837 | // To make track candidates with two segments in stations(1..) 4 and 5, | |
838 | // the first segment being pointed to by "BegSegment". | |
839 | // Returns the number of such track candidates. | |
840 | Int_t endStation, iEndSegment, nbCan2Seg; | |
841 | AliMUONSegment *endSegment, *extrapSegment; | |
842 | AliMUONTrack *recTrack; | |
843 | Double_t mcsFactor; | |
844 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidatesWithTwoSegments" << endl; | |
845 | // Station for the end segment | |
846 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
847 | // multiple scattering factor corresponding to one chamber | |
848 | mcsFactor = 0.0136 / | |
849 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
850 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
851 | // linear extrapolation to end station | |
852 | extrapSegment = | |
853 | BegSegment->CreateSegmentFromLinearExtrapToStation(endStation, mcsFactor); | |
854 | // number of candidates with 2 segments to 0 | |
855 | nbCan2Seg = 0; | |
856 | // Loop over segments in the end station | |
857 | for (iEndSegment = 0; iEndSegment < fNSegments[endStation]; iEndSegment++) { | |
858 | // pointer to segment | |
859 | endSegment = (AliMUONSegment*) ((*fSegmentsPtr[endStation])[iEndSegment]); | |
860 | // test compatibility between current segment and "extrapSegment" | |
04b5ea16 | 861 | // 4 because 4 quantities in chi2 |
a9e2aefa | 862 | if ((endSegment-> |
863 | NormalizedChi2WithSegment(extrapSegment, | |
864 | fMaxSigma2Distance)) <= 4.0) { | |
865 | // both segments compatible: | |
866 | // make track candidate from "begSegment" and "endSegment" | |
867 | if (fPrintLevel >= 2) | |
868 | cout << "TrackCandidate with Segment " << iEndSegment << | |
869 | " in Station(0..) " << endStation << endl; | |
870 | // flag for both segments in one track: | |
871 | // to be done in track constructor ???? | |
872 | BegSegment->SetInTrack(kTRUE); | |
873 | endSegment->SetInTrack(kTRUE); | |
874 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
875 | AliMUONTrack(BegSegment, endSegment, this); | |
876 | fNRecTracks++; | |
877 | if (fPrintLevel >= 10) recTrack->RecursiveDump(); | |
878 | // increment number of track candidates with 2 segments | |
879 | nbCan2Seg++; | |
880 | } | |
881 | } // for (iEndSegment = 0;... | |
882 | delete extrapSegment; // should not delete HitForRec's it points to !!!! | |
883 | return nbCan2Seg; | |
884 | } | |
885 | ||
886 | //__________________________________________________________________________ | |
887 | Int_t AliMUONEventReconstructor::MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment) | |
888 | { | |
889 | // To make track candidates with one segment and one point | |
890 | // in stations(1..) 4 and 5, | |
891 | // the segment being pointed to by "BegSegment". | |
892 | Int_t ch, ch1, ch2, endStation, iHit, iHitMax, iHitMin, nbCan1Seg1Hit; | |
893 | AliMUONHitForRec *extrapHitForRec, *hit; | |
894 | AliMUONTrack *recTrack; | |
895 | Double_t mcsFactor; | |
896 | if (fPrintLevel >= 1) | |
897 | cout << "enter MakeTrackCandidatesWithOneSegmentAndOnePoint" << endl; | |
898 | // station for the end point | |
899 | endStation = 7 - (BegSegment->GetHitForRec1())->GetChamberNumber() / 2; | |
900 | // multiple scattering factor corresponding to one chamber | |
901 | mcsFactor = 0.0136 / | |
902 | GetBendingMomentumFromImpactParam(BegSegment->GetBendingImpact()); | |
903 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
904 | // first and second chambers(0..) in the end station | |
905 | ch1 = 2 * endStation; | |
906 | ch2 = ch1 + 1; | |
907 | // number of candidates to 0 | |
908 | nbCan1Seg1Hit = 0; | |
909 | // Loop over chambers of the end station | |
910 | for (ch = ch2; ch >= ch1; ch--) { | |
911 | // linear extrapolation to chamber | |
912 | extrapHitForRec = | |
913 | BegSegment->CreateHitForRecFromLinearExtrapToChamber(ch, mcsFactor); | |
914 | // limits for the hit index in the loop | |
915 | iHitMin = fIndexOfFirstHitForRecPerChamber[ch]; | |
916 | iHitMax = iHitMin + fNHitsForRecPerChamber[ch]; | |
917 | // Loop over HitForRec's in the chamber | |
918 | for (iHit = iHitMin; iHit < iHitMax; iHit++) { | |
919 | // pointer to HitForRec | |
920 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
921 | // test compatibility between current HitForRec and "extrapHitForRec" | |
04b5ea16 | 922 | // 2 because 2 quantities in chi2 |
a9e2aefa | 923 | if ((hit-> |
924 | NormalizedChi2WithHitForRec(extrapHitForRec, | |
925 | fMaxSigma2Distance)) <= 2.0) { | |
926 | // both HitForRec's compatible: | |
927 | // make track candidate from begSegment and current HitForRec | |
928 | if (fPrintLevel >= 2) | |
929 | cout << "TrackCandidate with HitForRec " << iHit << | |
930 | " in Chamber(0..) " << ch << endl; | |
931 | // flag for beginning segments in one track: | |
932 | // to be done in track constructor ???? | |
933 | BegSegment->SetInTrack(kTRUE); | |
934 | recTrack = new ((*fRecTracksPtr)[fNRecTracks]) | |
935 | AliMUONTrack(BegSegment, hit, this); | |
936 | // the right place to eliminate "double counting" ???? how ???? | |
937 | fNRecTracks++; | |
938 | if (fPrintLevel >= 10) recTrack->RecursiveDump(); | |
939 | // increment number of track candidates | |
940 | nbCan1Seg1Hit++; | |
941 | } | |
942 | } // for (iHit = iHitMin;... | |
943 | delete extrapHitForRec; | |
944 | } // for (ch = ch2;... | |
945 | return nbCan1Seg1Hit; | |
946 | } | |
947 | ||
948 | //__________________________________________________________________________ | |
949 | void AliMUONEventReconstructor::MakeTrackCandidates(void) | |
950 | { | |
951 | // To make track candidates | |
952 | // with at least 3 aligned points in stations(1..) 4 and 5 | |
953 | // (two Segment's or one Segment and one HitForRec) | |
954 | Int_t begStation, iBegSegment, nbCan1Seg1Hit, nbCan2Seg; | |
955 | AliMUONSegment *begSegment; | |
956 | if (fPrintLevel >= 1) cout << "enter MakeTrackCandidates" << endl; | |
957 | // Loop over stations(1..) 5 and 4 for the beginning segment | |
958 | for (begStation = 4; begStation > 2; begStation--) { | |
959 | // Loop over segments in the beginning station | |
960 | for (iBegSegment = 0; iBegSegment < fNSegments[begStation]; iBegSegment++) { | |
961 | // pointer to segment | |
962 | begSegment = (AliMUONSegment*) ((*fSegmentsPtr[begStation])[iBegSegment]); | |
963 | if (fPrintLevel >= 2) | |
964 | cout << "look for TrackCandidate's with Segment " << iBegSegment << | |
965 | " in Station(0..) " << begStation << endl; | |
966 | // Look for track candidates with two segments, | |
967 | // "begSegment" and all compatible segments in other station. | |
968 | // Only for beginning station(1..) 5 | |
969 | // because candidates with 2 segments have to looked for only once. | |
970 | if (begStation == 4) | |
971 | nbCan2Seg = MakeTrackCandidatesWithTwoSegments(begSegment); | |
972 | // Look for track candidates with one segments and one point, | |
973 | // "begSegment" and all compatible HitForRec's in other station. | |
974 | // Only if "begSegment" does not belong already to a track candidate. | |
975 | // Is that a too strong condition ???? | |
976 | if (!(begSegment->GetInTrack())) | |
977 | nbCan1Seg1Hit = MakeTrackCandidatesWithOneSegmentAndOnePoint(begSegment); | |
978 | } // for (iBegSegment = 0;... | |
979 | } // for (begStation = 4;... | |
980 | return; | |
981 | } | |
982 | ||
983 | //__________________________________________________________________________ | |
984 | void AliMUONEventReconstructor::FollowTracks(void) | |
985 | { | |
986 | // Follow tracks in stations(1..) 3, 2 and 1 | |
04b5ea16 | 987 | // too long: should be made more modular !!!! |
a9e2aefa | 988 | AliMUONHitForRec *bestHit, *extrapHit, *hit; |
989 | AliMUONSegment *bestSegment, *extrapSegment, *segment; | |
04b5ea16 | 990 | AliMUONTrack *track, *nextTrack; |
991 | AliMUONTrackParam *trackParam1, trackParam[2], trackParamVertex; | |
d82671a0 | 992 | Int_t ch, chInStation, chBestHit, iHit, iSegment, station, trackIndex; |
04b5ea16 | 993 | Double_t bestChi2, chi2, dZ1, dZ2, dZ3, maxSigma2Distance, mcsFactor; |
9cbdf048 | 994 | AliMUON *pMUON = (AliMUON*) gAlice->GetModule("MUON"); // necessary ???? |
04b5ea16 | 995 | // local maxSigma2Distance, for easy increase in testing |
996 | maxSigma2Distance = fMaxSigma2Distance; | |
a9e2aefa | 997 | if (fPrintLevel >= 2) |
998 | cout << "enter FollowTracks" << endl; | |
999 | // Loop over track candidates | |
04b5ea16 | 1000 | track = (AliMUONTrack*) fRecTracksPtr->First(); |
1001 | trackIndex = -1; | |
1002 | while (track) { | |
1003 | // Follow function for each track candidate ???? | |
1004 | trackIndex++; | |
1005 | nextTrack = (AliMUONTrack*) fRecTracksPtr->After(track); // prepare next track | |
a9e2aefa | 1006 | if (fPrintLevel >= 2) |
1007 | cout << "FollowTracks: track candidate(0..): " << trackIndex << endl; | |
a9e2aefa | 1008 | // Fit track candidate from vertex at X = Y = 0 |
04b5ea16 | 1009 | track->SetFitMCS(0); // fit without Multiple Scattering |
a9e2aefa | 1010 | track->Fit(track->GetTrackParamAtVertex(), 3); |
1011 | if (fPrintLevel >= 10) { | |
1012 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1013 | << " after fit in stations(1..) 4 and 5" << endl; | |
1014 | track->RecursiveDump(); | |
1015 | } | |
1016 | // Loop over stations(1..) 3, 2 and 1 | |
04b5ea16 | 1017 | // something SPECIAL for stations 2 and 1 for majority 3 coincidence ???? |
1018 | // otherwise: majority coincidence 2 !!!! | |
a9e2aefa | 1019 | for (station = 2; station >= 0; station--) { |
1020 | // Track parameters at first track hit (smallest Z) | |
1021 | trackParam1 = ((AliMUONTrackHit*) | |
1022 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1023 | // extrapolation to station | |
1024 | trackParam1->ExtrapToStation(station, trackParam); | |
79e1e601 | 1025 | extrapSegment = new AliMUONSegment(); // empty segment |
a9e2aefa | 1026 | // multiple scattering factor corresponding to one chamber |
1027 | // and momentum in bending plane (not total) | |
1028 | mcsFactor = 0.0136 * trackParam1->GetInverseBendingMomentum(); | |
1029 | mcsFactor = fChamberThicknessInX0 * mcsFactor * mcsFactor; | |
1030 | // Z difference from previous station | |
9cbdf048 | 1031 | dZ1 = (&(pMUON->Chamber(2 * station)))->Z() - |
1032 | (&(pMUON->Chamber(2 * station + 2)))->Z(); | |
a9e2aefa | 1033 | // Z difference between the two previous stations |
9cbdf048 | 1034 | dZ2 = (&(pMUON->Chamber(2 * station + 2)))->Z() - |
1035 | (&(pMUON->Chamber(2 * station + 4)))->Z(); | |
04b5ea16 | 1036 | // Z difference between the two chambers in the previous station |
1037 | dZ3 = (&(pMUON->Chamber(2 * station)))->Z() - | |
1038 | (&(pMUON->Chamber(2 * station + 1)))->Z(); | |
1039 | extrapSegment->SetBendingCoorReso2(fBendingResolution * fBendingResolution); | |
1040 | extrapSegment-> | |
1041 | SetNonBendingCoorReso2(fNonBendingResolution * fNonBendingResolution); | |
1042 | extrapSegment->UpdateFromStationTrackParam | |
1043 | (trackParam, mcsFactor, dZ1, dZ2, dZ3, station, | |
1044 | trackParam1->GetInverseBendingMomentum()); | |
a9e2aefa | 1045 | bestChi2 = 5.0; |
1046 | bestSegment = NULL; | |
1047 | if (fPrintLevel >= 10) { | |
1048 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1049 | << " Look for segment in station(0..): " << station << endl; | |
1050 | } | |
1051 | // Loop over segments in station | |
1052 | for (iSegment = 0; iSegment < fNSegments[station]; iSegment++) { | |
1053 | // Look for best compatible Segment in station | |
1054 | // should consider all possibilities ???? | |
1055 | // multiple scattering ???? | |
1056 | // separation in 2 functions: Segment and HitForRec ???? | |
1057 | segment = (AliMUONSegment*) ((*fSegmentsPtr[station])[iSegment]); | |
1058 | chi2 = segment->NormalizedChi2WithSegment(extrapSegment, maxSigma2Distance); | |
1059 | if (chi2 < bestChi2) { | |
1060 | // update best Chi2 and Segment if better found | |
1061 | bestSegment = segment; | |
1062 | bestChi2 = chi2; | |
1063 | } | |
1064 | } | |
1065 | if (bestSegment) { | |
1066 | // best segment found: add it to track candidate | |
1067 | track->AddSegment(bestSegment); | |
1068 | // set track parameters at these two TrakHit's | |
1069 | track->SetTrackParamAtHit(track->GetNTrackHits() - 2, &(trackParam[0])); | |
1070 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, &(trackParam[1])); | |
1071 | if (fPrintLevel >= 10) { | |
1072 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1073 | << " Added segment in station(0..): " << station << endl; | |
1074 | track->RecursiveDump(); | |
1075 | } | |
1076 | } | |
1077 | else { | |
1078 | // No best segment found: | |
1079 | // Look for best compatible HitForRec in station: | |
1080 | // should consider all possibilities ???? | |
1081 | // multiple scattering ???? do about like for extrapSegment !!!! | |
79e1e601 | 1082 | extrapHit = new AliMUONHitForRec(); // empty hit |
a9e2aefa | 1083 | bestChi2 = 3.0; |
1084 | bestHit = NULL; | |
1085 | if (fPrintLevel >= 10) { | |
1086 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1087 | << " Segment not found, look for hit in station(0..): " << station | |
1088 | << endl; | |
1089 | } | |
1090 | // Loop over chambers of the station | |
d82671a0 | 1091 | for (chInStation = 0; chInStation < 2; chInStation++) { |
a9e2aefa | 1092 | // coordinates of extrapolated hit |
d82671a0 | 1093 | extrapHit-> |
1094 | SetBendingCoor((&(trackParam[chInStation]))->GetBendingCoor()); | |
1095 | extrapHit-> | |
1096 | SetNonBendingCoor((&(trackParam[chInStation]))->GetNonBendingCoor()); | |
a9e2aefa | 1097 | // resolutions from "extrapSegment" |
1098 | extrapHit->SetBendingReso2(extrapSegment->GetBendingCoorReso2()); | |
1099 | extrapHit->SetNonBendingReso2(extrapSegment->GetNonBendingCoorReso2()); | |
1100 | // Loop over hits in the chamber | |
d82671a0 | 1101 | ch = 2 * station + ch; |
a9e2aefa | 1102 | for (iHit = fIndexOfFirstHitForRecPerChamber[ch]; |
1103 | iHit < fIndexOfFirstHitForRecPerChamber[ch] + | |
1104 | fNHitsForRecPerChamber[ch]; | |
1105 | iHit++) { | |
1106 | hit = (AliMUONHitForRec*) ((*fHitsForRecPtr)[iHit]); | |
1107 | // condition for hit not already in segment ???? | |
1108 | chi2 = hit->NormalizedChi2WithHitForRec(extrapHit, maxSigma2Distance); | |
1109 | if (chi2 < bestChi2) { | |
1110 | // update best Chi2 and HitForRec if better found | |
1111 | bestHit = hit; | |
1112 | bestChi2 = chi2; | |
d82671a0 | 1113 | chBestHit = chInStation; |
a9e2aefa | 1114 | } |
1115 | } | |
1116 | } | |
1117 | if (bestHit) { | |
1118 | // best hit found: add it to track candidate | |
1119 | track->AddHitForRec(bestHit); | |
d82671a0 | 1120 | // set track parameters at these two TrackHit's |
a9e2aefa | 1121 | track->SetTrackParamAtHit(track->GetNTrackHits() - 1, |
1122 | &(trackParam[chBestHit])); | |
1123 | if (fPrintLevel >= 10) { | |
1124 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1125 | << " Added hit in station(0..): " << station << endl; | |
1126 | track->RecursiveDump(); | |
1127 | } | |
1128 | } | |
1129 | else { | |
04b5ea16 | 1130 | // Remove current track candidate and update fNRecTracks |
1131 | // To be checked: recursive delete of TrackHit's !!!! | |
1132 | // For cleaner implementation: call track->Remove() | |
1133 | // to be coded, with all cleanings, | |
1134 | // including links between HitForRec's and TrackHit's !!!! | |
1135 | fRecTracksPtr->Remove(track); | |
1136 | fNRecTracks--; | |
1137 | delete extrapSegment; | |
a9e2aefa | 1138 | break; // stop the search for this candidate: |
1139 | // exit from the loop over station | |
1140 | } | |
1141 | } | |
04b5ea16 | 1142 | delete extrapSegment; |
a9e2aefa | 1143 | // Sort track hits according to increasing Z |
1144 | track->GetTrackHitsPtr()->Sort(); | |
1145 | // Update track parameters at first track hit (smallest Z) | |
1146 | trackParam1 = ((AliMUONTrackHit*) | |
1147 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
04b5ea16 | 1148 | // Track fit from first track hit varying X and Y, |
1149 | // with multiple Coulomb scattering if all stations | |
1150 | if (station == 0) track->SetFitMCS(1); | |
1151 | else track->SetFitMCS(0); | |
a9e2aefa | 1152 | track->Fit(trackParam1, 5); |
1153 | if (fPrintLevel >= 10) { | |
1154 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
1155 | << " after fit from station(0..): " << station << " to 4" << endl; | |
1156 | track->RecursiveDump(); | |
1157 | } | |
04b5ea16 | 1158 | // Track extrapolation to the vertex through the absorber (Branson) |
1159 | if (station == 0) { | |
1160 | trackParamVertex = *trackParam1; | |
1161 | (&trackParamVertex)->ExtrapToVertex(); | |
1162 | track->SetTrackParamAtVertex(&trackParamVertex); | |
1163 | } | |
1164 | if (fPrintLevel >= 1) { | |
1165 | cout << "FollowTracks: track candidate(0..): " << trackIndex | |
d82671a0 | 1166 | << " after extrapolation to vertex" << endl; |
1167 | track->RecursiveDump(); | |
04b5ea16 | 1168 | } |
a9e2aefa | 1169 | } // for (station = 2;... |
04b5ea16 | 1170 | // go really to next track |
1171 | track = nextTrack; | |
1172 | } // while (track) | |
1173 | // Compression of track array (necessary after Remove ????) | |
1174 | fRecTracksPtr->Compress(); | |
1175 | return; | |
1176 | } | |
1177 | ||
1178 | //__________________________________________________________________________ | |
1179 | void AliMUONEventReconstructor::EventDump(void) | |
1180 | { | |
1181 | // Dump reconstructed event (track parameters at vertex and at first hit), | |
1182 | // and the particle parameters | |
1183 | ||
1184 | AliMUONTrack *track; | |
1185 | AliMUONTrackParam *trackParam, *trackParam1; | |
1186 | TClonesArray *particles; // pointer to the particle list | |
1187 | TParticle *p; | |
1188 | Double_t bendingSlope, nonBendingSlope, pYZ; | |
1189 | Double_t pX, pY, pZ, x, y, z, c; | |
1190 | Int_t np, trackIndex, nTrackHits; | |
1191 | ||
1192 | if (fPrintLevel >= 1) cout << "****** enter EventDump ******" << endl; | |
1193 | if (fPrintLevel >= 1) { | |
1194 | cout << " Number of Reconstructed tracks :" << fNRecTracks << endl; | |
1195 | } | |
1196 | fRecTracksPtr->Compress(); // for simple loop without "Next" since no hole | |
1197 | // Loop over reconstructed tracks | |
1198 | for (trackIndex = 0; trackIndex < fNRecTracks; trackIndex++) { | |
1199 | if (fPrintLevel >= 1) | |
1200 | cout << " track number: " << trackIndex << endl; | |
1201 | // function for each track for modularity ???? | |
1202 | track = (AliMUONTrack*) ((*fRecTracksPtr)[trackIndex]); | |
1203 | nTrackHits = track->GetNTrackHits(); | |
1204 | if (fPrintLevel >= 1) | |
1205 | cout << " number of track hits: " << nTrackHits << endl; | |
1206 | // track parameters at Vertex | |
1207 | trackParam = track->GetTrackParamAtVertex(); | |
1208 | x = trackParam->GetNonBendingCoor(); | |
1209 | y = trackParam->GetBendingCoor(); | |
1210 | z = trackParam->GetZ(); | |
1211 | bendingSlope = trackParam->GetBendingSlope(); | |
1212 | nonBendingSlope = trackParam->GetNonBendingSlope(); | |
1213 | pYZ = 1/TMath::Abs(trackParam->GetInverseBendingMomentum()); | |
1214 | pZ = pYZ/TMath::Sqrt(1+bendingSlope*bendingSlope); | |
1215 | pX = pZ * nonBendingSlope; | |
1216 | pY = pZ * bendingSlope; | |
1217 | c = TMath::Sign(1.0, trackParam->GetInverseBendingMomentum()); | |
1218 | if (fPrintLevel >= 1) | |
1219 | printf(" track parameters at Vertex z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1220 | z, x, y, pX, pY, pZ, c); | |
1221 | ||
1222 | // track parameters at first hit | |
1223 | trackParam1 = ((AliMUONTrackHit*) | |
1224 | (track->GetTrackHitsPtr()->First()))->GetTrackParam(); | |
1225 | x = trackParam1->GetNonBendingCoor(); | |
1226 | y = trackParam1->GetBendingCoor(); | |
1227 | z = trackParam1->GetZ(); | |
1228 | bendingSlope = trackParam1->GetBendingSlope(); | |
1229 | nonBendingSlope = trackParam1->GetNonBendingSlope(); | |
1230 | pYZ = 1/TMath::Abs(trackParam1->GetInverseBendingMomentum()); | |
1231 | pZ = pYZ/TMath::Sqrt(1.0 + bendingSlope * bendingSlope); | |
1232 | pX = pZ * nonBendingSlope; | |
1233 | pY = pZ * bendingSlope; | |
1234 | c = TMath::Sign(1.0, trackParam1->GetInverseBendingMomentum()); | |
1235 | if (fPrintLevel >= 1) | |
1236 | printf(" track parameters at z= %f: X= %f Y= %f pX= %f pY= %f pZ= %f c= %f\n", | |
1237 | z, x, y, pX, pY, pZ, c); | |
1238 | } | |
1239 | // informations about generated particles | |
1240 | particles = gAlice->Particles(); | |
1241 | np = particles->GetEntriesFast(); | |
1242 | printf(" **** number of generated particles: %d \n", np); | |
1243 | ||
1244 | for (Int_t iPart = 0; iPart < np; iPart++) { | |
1245 | p = (TParticle*) particles->UncheckedAt(iPart); | |
1246 | printf(" particle %d: type= %d px= %f py= %f pz= %f pdg= %d\n", | |
1247 | iPart, p->GetPdgCode(), p->Px(), p->Py(), p->Pz(), p->GetPdgCode()); | |
1248 | } | |
a9e2aefa | 1249 | return; |
1250 | } | |
1251 | ||
1252 | void AliMUONEventReconstructor::Streamer(TBuffer &R__b) | |
1253 | { | |
1254 | ; | |
1255 | } |