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e4f2f73d | 1 | /************************************************************************** |
972ef65e | 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 | **************************************************************************/ | |
e4f2f73d | 15 | |
16 | /* $Id$ */ | |
17 | ||
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // Track finder // | |
21 | // // | |
22 | // Authors: // | |
23 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
24 | // Markus Fasel <M.Fasel@gsi.de> // | |
25 | // // | |
26 | /////////////////////////////////////////////////////////////////////////////// | |
27 | ||
bb56afff | 28 | // #include <Riostream.h> |
29 | // #include <stdio.h> | |
30 | // #include <string.h> | |
e4f2f73d | 31 | |
32 | #include <TBranch.h> | |
bb56afff | 33 | #include <TDirectory.h> |
e4f2f73d | 34 | #include <TLinearFitter.h> |
e4f2f73d | 35 | #include <TTree.h> |
36 | #include <TClonesArray.h> | |
e4f2f73d | 37 | #include <TTreeStream.h> |
38 | ||
39 | #include "AliLog.h" | |
40 | #include "AliESDEvent.h" | |
bb56afff | 41 | #include "AliGeomManager.h" |
e4f2f73d | 42 | #include "AliRieman.h" |
43 | #include "AliTrackPointArray.h" | |
44 | ||
e4f2f73d | 45 | #include "AliTRDgeometry.h" |
46 | #include "AliTRDpadPlane.h" | |
e4f2f73d | 47 | #include "AliTRDcalibDB.h" |
e4f2f73d | 48 | #include "AliTRDReconstructor.h" |
49 | #include "AliTRDCalibraFillHisto.h" | |
e4f2f73d | 50 | #include "AliTRDrecoParam.h" |
bb56afff | 51 | |
52 | #include "AliTRDcluster.h" | |
e4f2f73d | 53 | #include "AliTRDseedV1.h" |
0906e73e | 54 | #include "AliTRDtrackV1.h" |
bb56afff | 55 | #include "AliTRDtrackerV1.h" |
56 | #include "AliTRDtrackerDebug.h" | |
57 | #include "AliTRDtrackingChamber.h" | |
58 | #include "AliTRDchamberTimeBin.h" | |
59 | ||
e4f2f73d | 60 | |
e4f2f73d | 61 | |
62 | ClassImp(AliTRDtrackerV1) | |
eb38ed55 | 63 | |
64 | ||
65 | const Float_t AliTRDtrackerV1::fgkMinClustersInTrack = 0.5; // | |
66 | const Float_t AliTRDtrackerV1::fgkLabelFraction = 0.8; // | |
67 | const Double_t AliTRDtrackerV1::fgkMaxChi2 = 12.0; // | |
68 | const Double_t AliTRDtrackerV1::fgkMaxSnp = 0.95; // Maximum local sine of the azimuthal angle | |
69 | const Double_t AliTRDtrackerV1::fgkMaxStep = 2.0; // Maximal step size in propagation | |
d76231c8 | 70 | Double_t AliTRDtrackerV1::fgTopologicQA[kNConfigs] = { |
41702fec | 71 | 0.1112, 0.1112, 0.1112, 0.0786, 0.0786, |
72 | 0.0786, 0.0786, 0.0579, 0.0579, 0.0474, | |
73 | 0.0474, 0.0408, 0.0335, 0.0335, 0.0335 | |
e4f2f73d | 74 | }; |
2985ffcb | 75 | Int_t AliTRDtrackerV1::fgNTimeBins = 0; |
eb38ed55 | 76 | AliRieman* AliTRDtrackerV1::fgRieman = 0x0; |
77 | TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = 0x0; | |
78 | TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = 0x0; | |
e4f2f73d | 79 | |
80 | //____________________________________________________________________ | |
3a039a31 | 81 | AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) |
41702fec | 82 | :AliTracker() |
06b32d95 | 83 | ,fReconstructor(0x0) |
41702fec | 84 | ,fGeom(new AliTRDgeometry()) |
85 | ,fClusters(0x0) | |
86 | ,fTracklets(0x0) | |
87 | ,fTracks(0x0) | |
88 | ,fSieveSeeding(0) | |
e4f2f73d | 89 | { |
41702fec | 90 | // |
91 | // Default constructor. | |
92 | // | |
a7ac01d2 | 93 | AliTRDcalibDB *trd = 0x0; |
94 | if (!(trd = AliTRDcalibDB::Instance())) { | |
41702fec | 95 | AliFatal("Could not get calibration object"); |
96 | } | |
a7ac01d2 | 97 | |
98 | if(!fgNTimeBins) fgNTimeBins = trd->GetNumberOfTimeBins(); | |
41702fec | 99 | |
053767a4 | 100 | for (Int_t isector = 0; isector < AliTRDgeometry::kNsector; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector); |
3a039a31 | 101 | |
d611c74f | 102 | for(Int_t isl =0; isl<kNSeedPlanes; isl++) fSeedTB[isl] = 0x0; |
d20df6fc | 103 | |
3a039a31 | 104 | // Initialize debug stream |
06b32d95 | 105 | if(rec) SetReconstructor(rec); |
eb38ed55 | 106 | } |
107 | ||
e4f2f73d | 108 | //____________________________________________________________________ |
109 | AliTRDtrackerV1::~AliTRDtrackerV1() | |
110 | { | |
41702fec | 111 | // |
112 | // Destructor | |
113 | // | |
114 | ||
f7ab3117 | 115 | if(fgRieman) delete fgRieman; fgRieman = 0x0; |
116 | if(fgTiltedRieman) delete fgTiltedRieman; fgTiltedRieman = 0x0; | |
117 | if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained; fgTiltedRiemanConstrained = 0x0; | |
d611c74f | 118 | for(Int_t isl =0; isl<kNSeedPlanes; isl++) if(fSeedTB[isl]) delete fSeedTB[isl]; |
41702fec | 119 | if(fTracks) {fTracks->Delete(); delete fTracks;} |
120 | if(fTracklets) {fTracklets->Delete(); delete fTracklets;} | |
48f8adf3 | 121 | if(fClusters) { |
122 | fClusters->Delete(); delete fClusters; | |
123 | } | |
41702fec | 124 | if(fGeom) delete fGeom; |
e4f2f73d | 125 | } |
126 | ||
127 | //____________________________________________________________________ | |
128 | Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd) | |
129 | { | |
41702fec | 130 | // |
131 | // Steering stand alone tracking for full TRD detector | |
132 | // | |
133 | // Parameters : | |
134 | // esd : The ESD event. On output it contains | |
135 | // the ESD tracks found in TRD. | |
136 | // | |
137 | // Output : | |
138 | // Number of tracks found in the TRD detector. | |
139 | // | |
140 | // Detailed description | |
141 | // 1. Launch individual SM trackers. | |
142 | // See AliTRDtrackerV1::Clusters2TracksSM() for details. | |
143 | // | |
144 | ||
3a039a31 | 145 | if(!fReconstructor->GetRecoParam() ){ |
146 | AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam()."); | |
41702fec | 147 | return 0; |
148 | } | |
149 | ||
150 | //AliInfo("Start Track Finder ..."); | |
151 | Int_t ntracks = 0; | |
053767a4 | 152 | for(int ism=0; ism<AliTRDgeometry::kNsector; ism++){ |
41702fec | 153 | // for(int ism=1; ism<2; ism++){ |
154 | //AliInfo(Form("Processing supermodule %i ...", ism)); | |
155 | ntracks += Clusters2TracksSM(ism, esd); | |
156 | } | |
157 | AliInfo(Form("Number of found tracks : %d", ntracks)); | |
158 | return ntracks; | |
e4f2f73d | 159 | } |
160 | ||
0906e73e | 161 | |
162 | //_____________________________________________________________________________ | |
eb38ed55 | 163 | Bool_t AliTRDtrackerV1::GetTrackPoint(Int_t index, AliTrackPoint &p) const |
0906e73e | 164 | { |
41702fec | 165 | //AliInfo(Form("Asking for tracklet %d", index)); |
166 | ||
84eab75a | 167 | // reset position of the point before using it |
168 | p.SetXYZ(0., 0., 0.); | |
2f7514a6 | 169 | AliTRDseedV1 *tracklet = GetTracklet(index); |
170 | if (!tracklet) return kFALSE; | |
84eab75a | 171 | |
41702fec | 172 | // get detector for this tracklet |
84eab75a | 173 | Int_t idet = tracklet->GetDetector(); |
41702fec | 174 | |
175 | Double_t local[3]; | |
176 | local[0] = tracklet->GetX0(); | |
177 | local[1] = tracklet->GetYfit(0); | |
178 | local[2] = tracklet->GetZfit(0); | |
179 | Double_t global[3]; | |
180 | fGeom->RotateBack(idet, local, global); | |
181 | p.SetXYZ(global[0],global[1],global[2]); | |
182 | ||
183 | ||
184 | // setting volume id | |
185 | AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1; | |
053767a4 | 186 | switch (fGeom->GetLayer(idet)) { |
41702fec | 187 | case 0: |
188 | iLayer = AliGeomManager::kTRD1; | |
189 | break; | |
190 | case 1: | |
191 | iLayer = AliGeomManager::kTRD2; | |
192 | break; | |
193 | case 2: | |
194 | iLayer = AliGeomManager::kTRD3; | |
195 | break; | |
196 | case 3: | |
197 | iLayer = AliGeomManager::kTRD4; | |
198 | break; | |
199 | case 4: | |
200 | iLayer = AliGeomManager::kTRD5; | |
201 | break; | |
202 | case 5: | |
203 | iLayer = AliGeomManager::kTRD6; | |
204 | break; | |
205 | }; | |
053767a4 | 206 | Int_t modId = fGeom->GetSector(idet) * fGeom->Nstack() + fGeom->GetStack(idet); |
41702fec | 207 | UShort_t volid = AliGeomManager::LayerToVolUID(iLayer, modId); |
208 | p.SetVolumeID(volid); | |
209 | ||
210 | return kTRUE; | |
0906e73e | 211 | } |
212 | ||
eb38ed55 | 213 | //____________________________________________________________________ |
214 | TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitter() | |
215 | { | |
41702fec | 216 | if(!fgTiltedRieman) fgTiltedRieman = new TLinearFitter(4, "hyp4"); |
217 | return fgTiltedRieman; | |
eb38ed55 | 218 | } |
0906e73e | 219 | |
eb38ed55 | 220 | //____________________________________________________________________ |
221 | TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitterConstraint() | |
222 | { | |
41702fec | 223 | if(!fgTiltedRiemanConstrained) fgTiltedRiemanConstrained = new TLinearFitter(2, "hyp2"); |
224 | return fgTiltedRiemanConstrained; | |
eb38ed55 | 225 | } |
41702fec | 226 | |
eb38ed55 | 227 | //____________________________________________________________________ |
228 | AliRieman* AliTRDtrackerV1::GetRiemanFitter() | |
229 | { | |
053767a4 | 230 | if(!fgRieman) fgRieman = new AliRieman(AliTRDtrackingChamber::kNTimeBins * AliTRDgeometry::kNlayer); |
41702fec | 231 | return fgRieman; |
eb38ed55 | 232 | } |
41702fec | 233 | |
0906e73e | 234 | //_____________________________________________________________________________ |
235 | Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) | |
236 | { | |
41702fec | 237 | // |
238 | // Gets seeds from ESD event. The seeds are AliTPCtrack's found and | |
239 | // backpropagated by the TPC tracker. Each seed is first propagated | |
240 | // to the TRD, and then its prolongation is searched in the TRD. | |
241 | // If sufficiently long continuation of the track is found in the TRD | |
242 | // the track is updated, otherwise it's stored as originaly defined | |
243 | // by the TPC tracker. | |
244 | // | |
245 | ||
246 | // Calibration monitor | |
247 | AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); | |
248 | if (!calibra) AliInfo("Could not get Calibra instance\n"); | |
249 | ||
250 | Int_t found = 0; // number of tracks found | |
251 | Float_t foundMin = 20.0; | |
252 | ||
d611c74f | 253 | Float_t *quality = 0x0; |
254 | Int_t *index = 0x0; | |
41702fec | 255 | Int_t nSeed = event->GetNumberOfTracks(); |
d611c74f | 256 | if(nSeed){ |
257 | quality = new Float_t[nSeed]; | |
258 | index = new Int_t[nSeed]; | |
259 | for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) { | |
260 | AliESDtrack *seed = event->GetTrack(iSeed); | |
261 | Double_t covariance[15]; | |
262 | seed->GetExternalCovariance(covariance); | |
263 | quality[iSeed] = covariance[0] + covariance[2]; | |
264 | } | |
265 | // Sort tracks according to covariance of local Y and Z | |
b1957d3c | 266 | TMath::Sort(nSeed, quality, index,kFALSE); |
41702fec | 267 | } |
41702fec | 268 | |
269 | // Backpropagate all seeds | |
270 | Int_t expectedClr; | |
271 | AliTRDtrackV1 track; | |
272 | for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) { | |
273 | ||
274 | // Get the seeds in sorted sequence | |
275 | AliESDtrack *seed = event->GetTrack(index[iSeed]); | |
276 | ||
277 | // Check the seed status | |
278 | ULong_t status = seed->GetStatus(); | |
279 | if ((status & AliESDtrack::kTPCout) == 0) continue; | |
280 | if ((status & AliESDtrack::kTRDout) != 0) continue; | |
281 | ||
282 | // Do the back prolongation | |
283 | new(&track) AliTRDtrackV1(*seed); | |
215f7116 | 284 | track.SetReconstructor(fReconstructor); |
285 | ||
41702fec | 286 | //Int_t lbl = seed->GetLabel(); |
287 | //track.SetSeedLabel(lbl); | |
e4d4864b | 288 | |
289 | // Make backup and mark entrance in the TRD | |
76b60503 | 290 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDin); |
291 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); | |
27fbeba8 | 292 | Float_t p4 = track.GetC(track.GetBz()); |
ae3fbe1f | 293 | expectedClr = FollowBackProlongation(track); |
294 | ||
295 | if (expectedClr<0) continue; // Back prolongation failed | |
296 | ||
297 | if(expectedClr){ | |
d611c74f | 298 | found++; |
41702fec | 299 | // computes PID for track |
300 | track.CookPID(); | |
301 | // update calibration references using this track | |
302 | if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track); | |
303 | // save calibration object | |
224f357f | 304 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0 /*&& quality TODO*/){ |
305 | AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track); | |
306 | calibTrack->SetOwner(); | |
307 | seed->AddCalibObject(calibTrack); | |
308 | } | |
309 | //update ESD track | |
41702fec | 310 | if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) { |
2389e96f | 311 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); |
41702fec | 312 | track.UpdateESDtrack(seed); |
41702fec | 313 | } |
314 | } | |
315 | ||
27fbeba8 | 316 | if ((TMath::Abs(track.GetC(track.GetBz()) - p4) / TMath::Abs(p4) < 0.2) ||(track.Pt() > 0.8)) { |
e3cf3d02 | 317 | |
41702fec | 318 | // Make backup for back propagation |
41702fec | 319 | Int_t foundClr = track.GetNumberOfClusters(); |
320 | if (foundClr >= foundMin) { | |
41702fec | 321 | track.CookLabel(1. - fgkLabelFraction); |
322 | if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack()); | |
41702fec | 323 | |
324 | // Sign only gold tracks | |
325 | if (track.GetChi2() / track.GetNumberOfClusters() < 4) { | |
76b60503 | 326 | if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)){ |
327 | //UseClusters(&track); | |
328 | } | |
41702fec | 329 | } |
330 | Bool_t isGold = kFALSE; | |
331 | ||
332 | // Full gold track | |
333 | if (track.GetChi2() / track.GetNumberOfClusters() < 5) { | |
334 | if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); | |
335 | ||
336 | isGold = kTRUE; | |
337 | } | |
338 | ||
339 | // Almost gold track | |
340 | if ((!isGold) && (track.GetNCross() == 0) && (track.GetChi2() / track.GetNumberOfClusters() < 7)) { | |
341 | //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); | |
342 | if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); | |
343 | ||
344 | isGold = kTRUE; | |
345 | } | |
346 | ||
347 | if ((!isGold) && (track.GetBackupTrack())) { | |
348 | if ((track.GetBackupTrack()->GetNumberOfClusters() > foundMin) && ((track.GetBackupTrack()->GetChi2()/(track.GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) { | |
349 | seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); | |
350 | isGold = kTRUE; | |
351 | } | |
352 | } | |
353 | ||
354 | //if ((track->StatusForTOF() > 0) && (track->GetNCross() == 0) && (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) { | |
355 | //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup); | |
356 | //} | |
357 | } | |
358 | } | |
359 | ||
360 | // Propagation to the TOF (I.Belikov) | |
361 | if (track.IsStopped() == kFALSE) { | |
362 | Double_t xtof = 371.0; | |
363 | Double_t xTOF0 = 370.0; | |
364 | ||
27fbeba8 | 365 | Double_t c2 = track.GetSnp() + track.GetC(track.GetBz()) * (xtof - track.GetX()); |
41702fec | 366 | if (TMath::Abs(c2) >= 0.99) continue; |
367 | ||
ae3fbe1f | 368 | if (!PropagateToX(track, xTOF0, fgkMaxStep)) continue; |
41702fec | 369 | |
370 | // Energy losses taken to the account - check one more time | |
27fbeba8 | 371 | c2 = track.GetSnp() + track.GetC(track.GetBz()) * (xtof - track.GetX()); |
41702fec | 372 | if (TMath::Abs(c2) >= 0.99) continue; |
373 | ||
374 | //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) { | |
375 | // fHBackfit->Fill(7); | |
376 | //delete track; | |
377 | // continue; | |
378 | //} | |
379 | ||
380 | Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha()); | |
381 | Double_t y; | |
382 | track.GetYAt(xtof,GetBz(),y); | |
383 | if (y > ymax) { | |
384 | if (!track.Rotate( AliTRDgeometry::GetAlpha())) continue; | |
385 | }else if (y < -ymax) { | |
386 | if (!track.Rotate(-AliTRDgeometry::GetAlpha())) continue; | |
387 | } | |
388 | ||
389 | if (track.PropagateTo(xtof)) { | |
390 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); | |
391 | track.UpdateESDtrack(seed); | |
41702fec | 392 | } |
393 | } else { | |
394 | if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) { | |
395 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); | |
396 | ||
397 | track.UpdateESDtrack(seed); | |
41702fec | 398 | } |
399 | } | |
400 | ||
401 | seed->SetTRDQuality(track.StatusForTOF()); | |
402 | seed->SetTRDBudget(track.GetBudget(0)); | |
403 | } | |
d611c74f | 404 | if(index) delete [] index; |
405 | if(quality) delete [] quality; | |
41702fec | 406 | |
407 | ||
408 | AliInfo(Form("Number of seeds: %d", nSeed)); | |
409 | AliInfo(Form("Number of back propagated TRD tracks: %d", found)); | |
410 | ||
d611c74f | 411 | // run stand alone tracking |
3a039a31 | 412 | if (fReconstructor->IsSeeding()) Clusters2Tracks(event); |
41702fec | 413 | |
414 | return 0; | |
0906e73e | 415 | } |
416 | ||
417 | ||
418 | //____________________________________________________________________ | |
419 | Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) | |
420 | { | |
41702fec | 421 | // |
422 | // Refits tracks within the TRD. The ESD event is expected to contain seeds | |
423 | // at the outer part of the TRD. | |
424 | // The tracks are propagated to the innermost time bin | |
425 | // of the TRD and the ESD event is updated | |
426 | // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch) | |
427 | // | |
428 | ||
429 | Int_t nseed = 0; // contor for loaded seeds | |
430 | Int_t found = 0; // contor for updated TRD tracks | |
431 | ||
432 | ||
433 | AliTRDtrackV1 track; | |
434 | for (Int_t itrack = 0; itrack < event->GetNumberOfTracks(); itrack++) { | |
435 | AliESDtrack *seed = event->GetTrack(itrack); | |
436 | new(&track) AliTRDtrackV1(*seed); | |
437 | ||
438 | if (track.GetX() < 270.0) { | |
439 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); | |
440 | continue; | |
441 | } | |
442 | ||
e3cf3d02 | 443 | // reject tracks which failed propagation in the TRD or |
444 | // are produced by the TRD stand alone tracker | |
41702fec | 445 | ULong_t status = seed->GetStatus(); |
e3cf3d02 | 446 | if(!(status & AliESDtrack::kTRDout)) continue; |
447 | if(!(status & AliESDtrack::kTRDin)) continue; | |
41702fec | 448 | nseed++; |
449 | ||
450 | track.ResetCovariance(50.0); | |
451 | ||
452 | // do the propagation and processing | |
453 | Bool_t kUPDATE = kFALSE; | |
454 | Double_t xTPC = 250.0; | |
455 | if(FollowProlongation(track)){ | |
456 | // Prolongate to TPC | |
457 | if (PropagateToX(track, xTPC, fgkMaxStep)) { // -with update | |
e3cf3d02 | 458 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit); |
459 | found++; | |
460 | kUPDATE = kTRUE; | |
461 | } | |
462 | ||
463 | // Update the friend track | |
464 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ | |
465 | TObject *o = 0x0; Int_t ic = 0; | |
466 | AliTRDtrackV1 *calibTrack = 0x0; | |
467 | while((o = seed->GetCalibObject(ic++))){ | |
468 | if(!(calibTrack = dynamic_cast<AliTRDtrackV1*>(o))) continue; | |
469 | calibTrack->SetTrackHigh(track.GetTrackHigh()); | |
470 | } | |
41702fec | 471 | } |
e3cf3d02 | 472 | } |
41702fec | 473 | |
474 | // Prolongate to TPC without update | |
475 | if(!kUPDATE) { | |
476 | AliTRDtrackV1 tt(*seed); | |
e3cf3d02 | 477 | if (PropagateToX(tt, xTPC, fgkMaxStep)) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDbackup); |
41702fec | 478 | } |
479 | } | |
480 | AliInfo(Form("Number of loaded seeds: %d",nseed)); | |
481 | AliInfo(Form("Number of found tracks from loaded seeds: %d",found)); | |
482 | ||
483 | return 0; | |
0906e73e | 484 | } |
485 | ||
0906e73e | 486 | //____________________________________________________________________ |
487 | Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) | |
488 | { | |
41702fec | 489 | // Extrapolates the TRD track in the TPC direction. |
490 | // | |
491 | // Parameters | |
492 | // t : the TRD track which has to be extrapolated | |
493 | // | |
494 | // Output | |
495 | // number of clusters attached to the track | |
496 | // | |
497 | // Detailed description | |
498 | // | |
499 | // Starting from current radial position of track <t> this function | |
500 | // extrapolates the track through the 6 TRD layers. The following steps | |
501 | // are being performed for each plane: | |
502 | // 1. prepare track: | |
503 | // a. get plane limits in the local x direction | |
504 | // b. check crossing sectors | |
505 | // c. check track inclination | |
506 | // 2. search tracklet in the tracker list (see GetTracklet() for details) | |
507 | // 3. evaluate material budget using the geo manager | |
508 | // 4. propagate and update track using the tracklet information. | |
509 | // | |
510 | // Debug level 2 | |
511 | // | |
512 | ||
e3cf3d02 | 513 | Bool_t kStoreIn = kTRUE; |
41702fec | 514 | Int_t nClustersExpected = 0; |
e3cf3d02 | 515 | for (Int_t iplane = kNPlanes; iplane--;) { |
41702fec | 516 | Int_t index = 0; |
517 | AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); | |
518 | if(!tracklet) continue; | |
519 | if(!tracklet->IsOK()) AliWarning("tracklet not OK"); | |
520 | ||
e3cf3d02 | 521 | Double_t x = tracklet->GetX();//GetX0(); |
41702fec | 522 | // reject tracklets which are not considered for inward refit |
523 | if(x > t.GetX()+fgkMaxStep) continue; | |
524 | ||
525 | // append tracklet to track | |
526 | t.SetTracklet(tracklet, index); | |
527 | ||
528 | if (x < (t.GetX()-fgkMaxStep) && !PropagateToX(t, x+fgkMaxStep, fgkMaxStep)) break; | |
529 | if (!AdjustSector(&t)) break; | |
530 | ||
531 | // Start global position | |
532 | Double_t xyz0[3]; | |
533 | t.GetXYZ(xyz0); | |
534 | ||
535 | // End global position | |
536 | Double_t alpha = t.GetAlpha(), y, z; | |
537 | if (!t.GetProlongation(x,y,z)) break; | |
538 | Double_t xyz1[3]; | |
539 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); | |
540 | xyz1[1] = x * TMath::Sin(alpha) + y * TMath::Cos(alpha); | |
541 | xyz1[2] = z; | |
542 | ||
51a23065 | 543 | Double_t length = TMath::Sqrt( |
544 | (xyz0[0]-xyz1[0])*(xyz0[0]-xyz1[0]) + | |
545 | (xyz0[1]-xyz1[1])*(xyz0[1]-xyz1[1]) + | |
546 | (xyz0[2]-xyz1[2])*(xyz0[2]-xyz1[2]) | |
547 | ); | |
548 | if(length>0.){ | |
549 | // Get material budget | |
550 | Double_t param[7]; | |
551 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) break; | |
552 | Double_t xrho= param[0]*param[4]; | |
553 | Double_t xx0 = param[1]; // Get mean propagation parameters | |
554 | ||
555 | // Propagate and update | |
556 | t.PropagateTo(x, xx0, xrho); | |
557 | if (!AdjustSector(&t)) break; | |
558 | } | |
e3cf3d02 | 559 | if(kStoreIn){ |
560 | t.SetTrackHigh(); | |
561 | kStoreIn = kFALSE; | |
562 | } | |
563 | ||
41702fec | 564 | Double_t maxChi2 = t.GetPredictedChi2(tracklet); |
565 | if (maxChi2 < 1e+10 && t.Update(tracklet, maxChi2)){ | |
566 | nClustersExpected += tracklet->GetN(); | |
567 | } | |
568 | } | |
569 | ||
3a039a31 | 570 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec | 571 | Int_t index; |
51a23065 | 572 | for(int iplane=0; iplane<AliTRDgeometry::kNlayer; iplane++){ |
41702fec | 573 | AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); |
574 | if(!tracklet) continue; | |
575 | t.SetTracklet(tracklet, index); | |
576 | } | |
577 | ||
578 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); | |
29f95561 | 579 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 580 | cstreamer << "FollowProlongation" |
581 | << "EventNumber=" << eventNumber | |
582 | << "ncl=" << nClustersExpected | |
583 | //<< "track.=" << &t | |
584 | << "\n"; | |
585 | } | |
586 | ||
587 | return nClustersExpected; | |
0906e73e | 588 | |
589 | } | |
590 | ||
591 | //_____________________________________________________________________________ | |
592 | Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) | |
593 | { | |
41702fec | 594 | // Extrapolates the TRD track in the TOF direction. |
595 | // | |
596 | // Parameters | |
597 | // t : the TRD track which has to be extrapolated | |
598 | // | |
599 | // Output | |
600 | // number of clusters attached to the track | |
601 | // | |
602 | // Detailed description | |
603 | // | |
604 | // Starting from current radial position of track <t> this function | |
605 | // extrapolates the track through the 6 TRD layers. The following steps | |
606 | // are being performed for each plane: | |
607 | // 1. prepare track: | |
608 | // a. get plane limits in the local x direction | |
609 | // b. check crossing sectors | |
610 | // c. check track inclination | |
611 | // 2. build tracklet (see AliTRDseed::AttachClusters() for details) | |
612 | // 3. evaluate material budget using the geo manager | |
613 | // 4. propagate and update track using the tracklet information. | |
614 | // | |
615 | // Debug level 2 | |
616 | // | |
617 | ||
618 | Int_t nClustersExpected = 0; | |
b1957d3c | 619 | Double_t clength = .5*AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick(); |
41702fec | 620 | AliTRDtrackingChamber *chamber = 0x0; |
621 | ||
3b57a3f7 | 622 | AliTRDseedV1 tracklet, *ptrTracklet = 0x0; |
181d2c97 | 623 | // in case of stand alone tracking we store all the pointers to the tracklets in a temporary array |
624 | AliTRDseedV1 *tracklets[kNPlanes]; | |
625 | memset(tracklets, 0, sizeof(AliTRDseedV1 *) * kNPlanes); | |
626 | for(Int_t ip = 0; ip < kNPlanes; ip++){ | |
627 | tracklets[ip] = t.GetTracklet(ip); | |
628 | t.UnsetTracklet(ip); | |
629 | } | |
e3cf3d02 | 630 | Bool_t kStoreIn = kTRUE; |
631 | ||
3b57a3f7 | 632 | |
053767a4 | 633 | // Loop through the TRD layers |
e3cf3d02 | 634 | for (Int_t ilayer = 0; ilayer < kNPlanes; ilayer++) { |
41702fec | 635 | // BUILD TRACKLET IF NOT ALREADY BUILT |
b1957d3c | 636 | Double_t x = 0., x0, y, z, alpha; |
181d2c97 | 637 | ptrTracklet = tracklets[ilayer]; |
41702fec | 638 | if(!ptrTracklet){ |
053767a4 | 639 | ptrTracklet = new(&tracklet) AliTRDseedV1(ilayer); |
43d6ad34 | 640 | ptrTracklet->SetReconstructor(fReconstructor); |
41702fec | 641 | alpha = t.GetAlpha(); |
053767a4 | 642 | Int_t sector = Int_t(alpha/AliTRDgeometry::GetAlpha() + (alpha>0. ? 0 : AliTRDgeometry::kNsector)); |
41702fec | 643 | |
644 | if(!fTrSec[sector].GetNChambers()) continue; | |
645 | ||
053767a4 | 646 | if((x = fTrSec[sector].GetX(ilayer)) < 1.) continue; |
41702fec | 647 | |
b1957d3c | 648 | // Propagate closer to the current layer |
649 | x0 = x - 1.5*clength; | |
650 | if (x0 > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x0-fgkMaxStep, fgkMaxStep)) return -1/*nClustersExpected*/; | |
651 | if (!AdjustSector(&t)) return -1/*nClustersExpected*/; | |
652 | if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) return -1/*nClustersExpected*/; | |
653 | ||
35c24814 | 654 | if (!t.GetProlongation(x, y, z)) return -1/*nClustersExpected*/; |
053767a4 | 655 | Int_t stack = fGeom->GetStack(z, ilayer); |
41702fec | 656 | Int_t nCandidates = stack >= 0 ? 1 : 2; |
657 | z -= stack >= 0 ? 0. : 4.; | |
658 | ||
659 | for(int icham=0; icham<nCandidates; icham++, z+=8){ | |
053767a4 | 660 | if((stack = fGeom->GetStack(z, ilayer)) < 0) continue; |
41702fec | 661 | |
053767a4 | 662 | if(!(chamber = fTrSec[sector].GetChamber(stack, ilayer))) continue; |
41702fec | 663 | |
3a039a31 | 664 | if(chamber->GetNClusters() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; |
41702fec | 665 | |
666 | x = chamber->GetX(); | |
667 | ||
053767a4 | 668 | AliTRDpadPlane *pp = fGeom->GetPadPlane(ilayer, stack); |
aec26713 | 669 | tracklet.SetTilt(TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle())); |
41702fec | 670 | tracklet.SetPadLength(pp->GetLengthIPad()); |
ae4e8b84 | 671 | tracklet.SetDetector(chamber->GetDetector()); |
41702fec | 672 | tracklet.SetX0(x); |
b1957d3c | 673 | tracklet.UpDate(&t); |
674 | // if(!tracklet.Init(&t)){ | |
675 | // t.SetStopped(kTRUE); | |
676 | // return nClustersExpected; | |
677 | // } | |
678 | if(!tracklet.AttachClusters(chamber, kTRUE)) continue; | |
679 | //if(!tracklet.AttachClustersIter(chamber, 1000.)) continue; | |
680 | //tracklet.Init(&t); | |
41702fec | 681 | |
3a039a31 | 682 | if(tracklet.GetN() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; |
41702fec | 683 | |
684 | break; | |
685 | } | |
76b60503 | 686 | //ptrTracklet->UseClusters(); |
b1957d3c | 687 | }// else ptrTracklet->Init(&t); |
41702fec | 688 | if(!ptrTracklet->IsOK()){ |
689 | if(x < 1.) continue; //temporary | |
35c24814 | 690 | if(!PropagateToX(t, x-fgkMaxStep, fgkMaxStep)) return -1/*nClustersExpected*/; |
691 | if(!AdjustSector(&t)) return -1/*nClustersExpected*/; | |
692 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) return -1/*nClustersExpected*/; | |
41702fec | 693 | continue; |
694 | } | |
695 | ||
696 | // Propagate closer to the current chamber if neccessary | |
697 | x -= clength; | |
35c24814 | 698 | if (x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x-fgkMaxStep, fgkMaxStep)) return -1/*nClustersExpected*/; |
699 | if (!AdjustSector(&t)) return -1/*nClustersExpected*/; | |
700 | if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) return -1/*nClustersExpected*/; | |
41702fec | 701 | |
702 | // load tracklet to the tracker and the track | |
b1957d3c | 703 | ptrTracklet->Fit(kFALSE); // no tilt correction |
41702fec | 704 | ptrTracklet = SetTracklet(ptrTracklet); |
705 | t.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); | |
706 | ||
707 | ||
708 | // Calculate the mean material budget along the path inside the chamber | |
709 | //Calculate global entry and exit positions of the track in chamber (only track prolongation) | |
710 | Double_t xyz0[3]; // entry point | |
711 | t.GetXYZ(xyz0); | |
712 | alpha = t.GetAlpha(); | |
e3cf3d02 | 713 | x = ptrTracklet->GetX(); //GetX0(); |
35c24814 | 714 | if (!t.GetProlongation(x, y, z)) return -1/*nClustersExpected*/; |
41702fec | 715 | Double_t xyz1[3]; // exit point |
716 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); | |
717 | xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha); | |
718 | xyz1[2] = z; | |
719 | Double_t param[7]; | |
83dea92e | 720 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return -1; |
41702fec | 721 | // The mean propagation parameters |
722 | Double_t xrho = param[0]*param[4]; // density*length | |
723 | Double_t xx0 = param[1]; // radiation length | |
724 | ||
725 | // Propagate and update track | |
35c24814 | 726 | if (!t.PropagateTo(x, xx0, xrho)) return -1/*nClustersExpected*/; |
727 | if (!AdjustSector(&t)) return -1/*nClustersExpected*/; | |
e3cf3d02 | 728 | |
729 | if(kStoreIn){ | |
730 | t.SetTrackLow(); | |
731 | kStoreIn = kFALSE; | |
732 | } | |
41702fec | 733 | Double_t maxChi2 = t.GetPredictedChi2(ptrTracklet); |
35c24814 | 734 | if (!t.Update(ptrTracklet, maxChi2)) return -1/*nClustersExpected*/; |
b1957d3c | 735 | ptrTracklet->UpDate(&t); |
736 | ||
ae3fbe1f | 737 | if (maxChi2<1e+10) { |
41702fec | 738 | nClustersExpected += ptrTracklet->GetN(); |
739 | //t.SetTracklet(&tracklet, index); | |
740 | } | |
741 | // Reset material budget if 2 consecutive gold | |
053767a4 | 742 | if(ilayer>0 && t.GetTracklet(ilayer-1) && ptrTracklet->GetN() + t.GetTracklet(ilayer-1)->GetN() > 20) t.SetBudget(2, 0.); |
41702fec | 743 | |
744 | // Make backup of the track until is gold | |
745 | // TO DO update quality check of the track. | |
746 | // consider comparison with fTimeBinsRange | |
747 | Float_t ratio0 = ptrTracklet->GetN() / Float_t(fgNTimeBins); | |
748 | //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1); | |
749 | //printf("tracklet.GetChi2() %f [< 18.0]\n", tracklet.GetChi2()); | |
750 | //printf("ratio0 %f [> 0.8]\n", ratio0); | |
751 | //printf("ratio1 %f [> 0.6]\n", ratio1); | |
752 | //printf("ratio0+ratio1 %f [> 1.5]\n", ratio0+ratio1); | |
753 | //printf("t.GetNCross() %d [== 0]\n", t.GetNCross()); | |
754 | //printf("TMath::Abs(t.GetSnp()) %f [< 0.85]\n", TMath::Abs(t.GetSnp())); | |
755 | //printf("t.GetNumberOfClusters() %d [> 20]\n", t.GetNumberOfClusters()); | |
756 | ||
757 | if (//(tracklet.GetChi2() < 18.0) && TO DO check with FindClusters and move it to AliTRDseed::Update | |
758 | (ratio0 > 0.8) && | |
759 | //(ratio1 > 0.6) && | |
760 | //(ratio0+ratio1 > 1.5) && | |
761 | (t.GetNCross() == 0) && | |
762 | (TMath::Abs(t.GetSnp()) < 0.85) && | |
e3cf3d02 | 763 | (t.GetNumberOfClusters() > 20)){ |
764 | t.MakeBackupTrack(); | |
765 | } | |
053767a4 | 766 | } // end layers loop |
41702fec | 767 | |
3a039a31 | 768 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
29f95561 | 769 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 770 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
771 | //AliTRDtrackV1 *debugTrack = new AliTRDtrackV1(t); | |
772 | //debugTrack->SetOwner(); | |
773 | cstreamer << "FollowBackProlongation" | |
774 | << "EventNumber=" << eventNumber | |
775 | << "ncl=" << nClustersExpected | |
776 | //<< "track.=" << debugTrack | |
777 | << "\n"; | |
778 | } | |
779 | ||
780 | return nClustersExpected; | |
0906e73e | 781 | } |
782 | ||
eb38ed55 | 783 | //_________________________________________________________________________ |
784 | Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes){ | |
41702fec | 785 | // |
786 | // Fits a Riemann-circle to the given points without tilting pad correction. | |
787 | // The fit is performed using an instance of the class AliRieman (equations | |
788 | // and transformations see documentation of this class) | |
789 | // Afterwards all the tracklets are Updated | |
790 | // | |
791 | // Parameters: - Array of tracklets (AliTRDseedV1) | |
792 | // - Storage for the chi2 values (beginning with direction z) | |
793 | // - Seeding configuration | |
794 | // Output: - The curvature | |
795 | // | |
796 | AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); | |
797 | fitter->Reset(); | |
798 | Int_t allplanes[] = {0, 1, 2, 3, 4, 5}; | |
799 | Int_t *ppl = &allplanes[0]; | |
800 | Int_t maxLayers = 6; | |
801 | if(planes){ | |
802 | maxLayers = 4; | |
803 | ppl = planes; | |
804 | } | |
805 | for(Int_t il = 0; il < maxLayers; il++){ | |
806 | if(!tracklets[ppl[il]].IsOK()) continue; | |
e3cf3d02 | 807 | fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfit(0), tracklets[ppl[il]].GetZfit(0),1,10); |
41702fec | 808 | } |
809 | fitter->Update(); | |
810 | // Set the reference position of the fit and calculate the chi2 values | |
811 | memset(chi2, 0, sizeof(Double_t) * 2); | |
812 | for(Int_t il = 0; il < maxLayers; il++){ | |
813 | // Reference positions | |
814 | tracklets[ppl[il]].Init(fitter); | |
815 | ||
816 | // chi2 | |
817 | if((!tracklets[ppl[il]].IsOK()) && (!planes)) continue; | |
818 | chi2[0] += tracklets[ppl[il]].GetChi2Y(); | |
819 | chi2[1] += tracklets[ppl[il]].GetChi2Z(); | |
820 | } | |
821 | return fitter->GetC(); | |
eb38ed55 | 822 | } |
823 | ||
824 | //_________________________________________________________________________ | |
825 | void AliTRDtrackerV1::FitRieman(AliTRDcluster **seedcl, Double_t chi2[2]) | |
826 | { | |
41702fec | 827 | // |
828 | // Performs a Riemann helix fit using the seedclusters as spacepoints | |
829 | // Afterwards the chi2 values are calculated and the seeds are updated | |
830 | // | |
831 | // Parameters: - The four seedclusters | |
832 | // - The tracklet array (AliTRDseedV1) | |
833 | // - The seeding configuration | |
834 | // - Chi2 array | |
835 | // | |
836 | // debug level 2 | |
837 | // | |
838 | AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); | |
839 | fitter->Reset(); | |
840 | for(Int_t i = 0; i < 4; i++) | |
841 | fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1, 10); | |
842 | fitter->Update(); | |
843 | ||
844 | ||
845 | // Update the seed and calculated the chi2 value | |
846 | chi2[0] = 0; chi2[1] = 0; | |
847 | for(Int_t ipl = 0; ipl < kNSeedPlanes; ipl++){ | |
848 | // chi2 | |
849 | chi2[0] += (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())); | |
850 | chi2[1] += (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())); | |
851 | } | |
eb38ed55 | 852 | } |
853 | ||
854 | ||
855 | //_________________________________________________________________________ | |
856 | Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex) | |
857 | { | |
41702fec | 858 | // |
859 | // Fits a helix to the clusters. Pad tilting is considered. As constraint it is | |
860 | // assumed that the vertex position is set to 0. | |
861 | // This method is very usefull for high-pt particles | |
862 | // Basis for the fit: (x - x0)^2 + (y - y0)^2 - R^2 = 0 | |
863 | // x0, y0: Center of the circle | |
864 | // Measured y-position: ymeas = y - tan(phiT)(zc - zt) | |
865 | // zc: center of the pad row | |
866 | // Equation which has to be fitted (after transformation): | |
867 | // a + b * u + e * v + 2*(ymeas + tan(phiT)(z - zVertex))*t = 0 | |
868 | // Transformation: | |
869 | // t = 1/(x^2 + y^2) | |
870 | // u = 2 * x * t | |
871 | // v = 2 * x * tan(phiT) * t | |
872 | // Parameters in the equation: | |
873 | // a = -1/y0, b = x0/y0, e = dz/dx | |
874 | // | |
875 | // The Curvature is calculated by the following equation: | |
876 | // - curv = a/Sqrt(b^2 + 1) = 1/R | |
877 | // Parameters: - the 6 tracklets | |
878 | // - the Vertex constraint | |
879 | // Output: - the Chi2 value of the track | |
880 | // | |
881 | // debug level 5 | |
882 | // | |
883 | ||
884 | TLinearFitter *fitter = GetTiltedRiemanFitterConstraint(); | |
885 | fitter->StoreData(kTRUE); | |
886 | fitter->ClearPoints(); | |
887 | AliTRDcluster *cl = 0x0; | |
888 | ||
889 | Float_t x, y, z, w, t, error, tilt; | |
890 | Double_t uvt[2]; | |
891 | Int_t nPoints = 0; | |
053767a4 | 892 | for(Int_t ilr = 0; ilr < AliTRDgeometry::kNlayer; ilr++){ |
893 | if(!tracklets[ilr].IsOK()) continue; | |
41702fec | 894 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ |
053767a4 | 895 | if(!tracklets[ilr].IsUsable(itb)) continue; |
896 | cl = tracklets[ilr].GetClusters(itb); | |
41702fec | 897 | x = cl->GetX(); |
898 | y = cl->GetY(); | |
899 | z = cl->GetZ(); | |
053767a4 | 900 | tilt = tracklets[ilr].GetTilt(); |
41702fec | 901 | // Transformation |
902 | t = 1./(x * x + y * y); | |
903 | uvt[0] = 2. * x * t; | |
904 | uvt[1] = 2. * x * t * tilt ; | |
905 | w = 2. * (y + tilt * (z - zVertex)) * t; | |
906 | error = 2. * 0.2 * t; | |
907 | fitter->AddPoint(uvt, w, error); | |
908 | nPoints++; | |
909 | } | |
910 | } | |
911 | fitter->Eval(); | |
912 | ||
913 | // Calculate curvature | |
914 | Double_t a = fitter->GetParameter(0); | |
915 | Double_t b = fitter->GetParameter(1); | |
916 | Double_t curvature = a/TMath::Sqrt(b*b + 1); | |
917 | ||
918 | Float_t chi2track = fitter->GetChisquare()/Double_t(nPoints); | |
919 | for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++) | |
e3cf3d02 | 920 | tracklets[ip].SetC(curvature); |
41702fec | 921 | |
3a039a31 | 922 | /* if(fReconstructor->GetStreamLevel() >= 5){ |
41702fec | 923 | //Linear Model on z-direction |
924 | Double_t xref = CalculateReferenceX(tracklets); // Relative to the middle of the stack | |
925 | Double_t slope = fitter->GetParameter(2); | |
926 | Double_t zref = slope * xref; | |
927 | Float_t chi2Z = CalculateChi2Z(tracklets, zref, slope, xref); | |
928 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); | |
929 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
29f95561 | 930 | TTreeSRedirector &treeStreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 931 | treeStreamer << "FitTiltedRiemanConstraint" |
932 | << "EventNumber=" << eventNumber | |
933 | << "CandidateNumber=" << candidateNumber | |
934 | << "Curvature=" << curvature | |
935 | << "Chi2Track=" << chi2track | |
936 | << "Chi2Z=" << chi2Z | |
937 | << "zref=" << zref | |
938 | << "\n"; | |
3a039a31 | 939 | }*/ |
41702fec | 940 | return chi2track; |
eb38ed55 | 941 | } |
942 | ||
943 | //_________________________________________________________________________ | |
944 | Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError) | |
945 | { | |
41702fec | 946 | // |
947 | // Performs a Riemann fit taking tilting pad correction into account | |
948 | // The equation of a Riemann circle, where the y position is substituted by the | |
949 | // measured y-position taking pad tilting into account, has to be transformed | |
950 | // into a 4-dimensional hyperplane equation | |
951 | // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 | |
952 | // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) | |
953 | // zc: center of the pad row | |
954 | // zt: z-position of the track | |
955 | // The z-position of the track is assumed to be linear dependent on the x-position | |
956 | // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 | |
957 | // Transformation: u = 2 * x * t | |
958 | // v = 2 * tan(phiT) * t | |
959 | // w = 2 * tan(phiT) * (x - xref) * t | |
960 | // t = 1 / (x^2 + ymeas^2) | |
961 | // Parameters: a = -1/y0 | |
962 | // b = x0/y0 | |
963 | // c = (R^2 -x0^2 - y0^2)/y0 | |
964 | // d = offset | |
965 | // e = dz/dx | |
966 | // If the offset respectively the slope in z-position is impossible, the parameters are fixed using | |
967 | // results from the simple riemann fit. Afterwards the fit is redone. | |
968 | // The curvature is calculated according to the formula: | |
969 | // curv = a/(1 + b^2 + c*a) = 1/R | |
970 | // | |
971 | // Paramters: - Array of tracklets (connected to the track candidate) | |
972 | // - Flag selecting the error definition | |
973 | // Output: - Chi2 values of the track (in Parameter list) | |
974 | // | |
975 | TLinearFitter *fitter = GetTiltedRiemanFitter(); | |
976 | fitter->StoreData(kTRUE); | |
977 | fitter->ClearPoints(); | |
978 | AliTRDLeastSquare zfitter; | |
979 | AliTRDcluster *cl = 0x0; | |
980 | ||
981 | Double_t xref = CalculateReferenceX(tracklets); | |
982 | Double_t x, y, z, t, tilt, dx, w, we; | |
983 | Double_t uvt[4]; | |
984 | Int_t nPoints = 0; | |
985 | // Containers for Least-square fitter | |
986 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ | |
987 | if(!tracklets[ipl].IsOK()) continue; | |
988 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ | |
989 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; | |
990 | if (!tracklets[ipl].IsUsable(itb)) continue; | |
991 | x = cl->GetX(); | |
992 | y = cl->GetY(); | |
993 | z = cl->GetZ(); | |
994 | tilt = tracklets[ipl].GetTilt(); | |
995 | dx = x - xref; | |
996 | // Transformation | |
997 | t = 1./(x*x + y*y); | |
998 | uvt[0] = 2. * x * t; | |
999 | uvt[1] = t; | |
1000 | uvt[2] = 2. * tilt * t; | |
1001 | uvt[3] = 2. * tilt * dx * t; | |
1002 | w = 2. * (y + tilt*z) * t; | |
1003 | // error definition changes for the different calls | |
1004 | we = 2. * t; | |
1005 | we *= sigError ? tracklets[ipl].GetSigmaY() : 0.2; | |
1006 | fitter->AddPoint(uvt, w, we); | |
1007 | zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); | |
1008 | nPoints++; | |
1009 | } | |
1010 | } | |
1011 | fitter->Eval(); | |
1012 | zfitter.Eval(); | |
1013 | ||
1014 | Double_t offset = fitter->GetParameter(3); | |
1015 | Double_t slope = fitter->GetParameter(4); | |
1016 | ||
1017 | // Linear fitter - not possible to make boundaries | |
1018 | // Do not accept non possible z and dzdx combinations | |
1019 | Bool_t acceptablez = kTRUE; | |
1020 | Double_t zref = 0.0; | |
1021 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { | |
1022 | if(!tracklets[iLayer].IsOK()) continue; | |
1023 | zref = offset + slope * (tracklets[iLayer].GetX0() - xref); | |
e3cf3d02 | 1024 | if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) |
41702fec | 1025 | acceptablez = kFALSE; |
1026 | } | |
1027 | if (!acceptablez) { | |
1028 | Double_t dzmf = zfitter.GetFunctionParameter(1); | |
1029 | Double_t zmf = zfitter.GetFunctionValue(&xref); | |
1030 | fgTiltedRieman->FixParameter(3, zmf); | |
1031 | fgTiltedRieman->FixParameter(4, dzmf); | |
1032 | fitter->Eval(); | |
1033 | fitter->ReleaseParameter(3); | |
1034 | fitter->ReleaseParameter(4); | |
1035 | offset = fitter->GetParameter(3); | |
1036 | slope = fitter->GetParameter(4); | |
1037 | } | |
1038 | ||
1039 | // Calculate Curvarture | |
1040 | Double_t a = fitter->GetParameter(0); | |
1041 | Double_t b = fitter->GetParameter(1); | |
1042 | Double_t c = fitter->GetParameter(2); | |
1043 | Double_t curvature = 1.0 + b*b - c*a; | |
1044 | if (curvature > 0.0) | |
1045 | curvature = a / TMath::Sqrt(curvature); | |
1046 | ||
1047 | Double_t chi2track = fitter->GetChisquare()/Double_t(nPoints); | |
1048 | ||
1049 | // Update the tracklets | |
1050 | Double_t dy, dz; | |
1051 | for(Int_t iLayer = 0; iLayer < AliTRDtrackerV1::kNPlanes; iLayer++) { | |
1052 | ||
1053 | x = tracklets[iLayer].GetX0(); | |
1054 | y = 0; | |
1055 | z = 0; | |
1056 | dy = 0; | |
1057 | dz = 0; | |
1058 | ||
1059 | // y: R^2 = (x - x0)^2 + (y - y0)^2 | |
1060 | // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) | |
1061 | // R = Sqrt() = 1/Curvature | |
1062 | // => y = y0 +/- Sqrt(1/Curvature^2 - (x - x0)^2) | |
1063 | Double_t res = (x * a + b); // = (x - x0)/y0 | |
1064 | res *= res; | |
1065 | res = 1.0 - c * a + b * b - res; // = (R^2 - (x - x0)^2)/y0^2 | |
1066 | if (res >= 0) { | |
1067 | res = TMath::Sqrt(res); | |
1068 | y = (1.0 - res) / a; | |
1069 | } | |
1070 | ||
1071 | // dy: R^2 = (x - x0)^2 + (y - y0)^2 | |
1072 | // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0 | |
1073 | // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) | |
1074 | // Curvature: cr = 1/R = a/Sqrt(1 + b^2 - c*a) | |
1075 | // => dy/dx = (x - x0)/(1/(cr^2) - (x - x0)^2) | |
1076 | Double_t x0 = -b / a; | |
1077 | if (-c * a + b * b + 1 > 0) { | |
1078 | if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) { | |
1079 | Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0)); | |
1080 | if (a < 0) yderiv *= -1.0; | |
1081 | dy = yderiv; | |
1082 | } | |
1083 | } | |
1084 | z = offset + slope * (x - xref); | |
1085 | dz = slope; | |
1086 | tracklets[iLayer].SetYref(0, y); | |
1087 | tracklets[iLayer].SetYref(1, dy); | |
1088 | tracklets[iLayer].SetZref(0, z); | |
1089 | tracklets[iLayer].SetZref(1, dz); | |
1090 | tracklets[iLayer].SetC(curvature); | |
1091 | tracklets[iLayer].SetChi2(chi2track); | |
1092 | } | |
1093 | ||
3a039a31 | 1094 | /* if(fReconstructor->GetStreamLevel() >=5){ |
29f95561 | 1095 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 1096 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
1097 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
1098 | Double_t chi2z = CalculateChi2Z(tracklets, offset, slope, xref); | |
1099 | cstreamer << "FitTiltedRieman0" | |
1100 | << "EventNumber=" << eventNumber | |
1101 | << "CandidateNumber=" << candidateNumber | |
1102 | << "xref=" << xref | |
1103 | << "Chi2Z=" << chi2z | |
1104 | << "\n"; | |
3a039a31 | 1105 | }*/ |
41702fec | 1106 | return chi2track; |
eb38ed55 | 1107 | } |
1108 | ||
3b57a3f7 | 1109 | |
9e333711 | 1110 | //____________________________________________________________________ |
6e4d4425 | 1111 | Double_t AliTRDtrackerV1::FitLine(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t err, Int_t np, AliTrackPoint *points) |
9e333711 | 1112 | { |
1113 | AliTRDLeastSquare yfitter, zfitter; | |
1114 | AliTRDcluster *cl = 0x0; | |
1115 | ||
1116 | AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; | |
1117 | if(!tracklets){ | |
1118 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ | |
1119 | if(!(tracklet = track->GetTracklet(ipl))) continue; | |
1120 | if(!tracklet->IsOK()) continue; | |
1121 | new(&work[ipl]) AliTRDseedV1(*tracklet); | |
1122 | } | |
1123 | tracklets = &work[0]; | |
1124 | } | |
1125 | ||
1126 | Double_t xref = CalculateReferenceX(tracklets); | |
1127 | Double_t x, y, z, dx, ye, yr, tilt; | |
1128 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ | |
1129 | if(!tracklets[ipl].IsOK()) continue; | |
1130 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ | |
1131 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; | |
1132 | if (!tracklets[ipl].IsUsable(itb)) continue; | |
1133 | x = cl->GetX(); | |
1134 | z = cl->GetZ(); | |
1135 | dx = x - xref; | |
1136 | zfitter.AddPoint(&dx, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); | |
1137 | } | |
1138 | } | |
1139 | zfitter.Eval(); | |
1140 | Double_t z0 = zfitter.GetFunctionParameter(0); | |
1141 | Double_t dzdx = zfitter.GetFunctionParameter(1); | |
1142 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ | |
1143 | if(!tracklets[ipl].IsOK()) continue; | |
1144 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ | |
1145 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; | |
1146 | if (!tracklets[ipl].IsUsable(itb)) continue; | |
1147 | x = cl->GetX(); | |
1148 | y = cl->GetY(); | |
1149 | z = cl->GetZ(); | |
1150 | tilt = tracklets[ipl].GetTilt(); | |
1151 | dx = x - xref; | |
1152 | yr = y + tilt*(z - z0 - dzdx*dx); | |
1153 | // error definition changes for the different calls | |
1154 | ye = tilt*TMath::Sqrt(cl->GetSigmaZ2()); | |
1155 | ye += err ? tracklets[ipl].GetSigmaY() : 0.2; | |
1156 | yfitter.AddPoint(&dx, yr, ye); | |
1157 | } | |
1158 | } | |
1159 | yfitter.Eval(); | |
1160 | Double_t y0 = yfitter.GetFunctionParameter(0); | |
1161 | Double_t dydx = yfitter.GetFunctionParameter(1); | |
1162 | Double_t chi2 = 0.;//yfitter.GetChisquare()/Double_t(nPoints); | |
1163 | ||
1164 | //update track points array | |
1165 | if(np && points){ | |
1166 | Float_t xyz[3]; | |
1167 | for(int ip=0; ip<np; ip++){ | |
1168 | points[ip].GetXYZ(xyz); | |
1169 | xyz[1] = y0 + dydx * (xyz[0] - xref); | |
1170 | xyz[2] = z0 + dzdx * (xyz[0] - xref); | |
1171 | points[ip].SetXYZ(xyz); | |
1172 | } | |
1173 | } | |
1174 | return chi2; | |
1175 | } | |
1176 | ||
1177 | ||
3b57a3f7 | 1178 | //_________________________________________________________________________ |
6e4d4425 | 1179 | Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t sigError, Int_t np, AliTrackPoint *points) |
3b57a3f7 | 1180 | { |
41702fec | 1181 | // |
1182 | // Performs a Riemann fit taking tilting pad correction into account | |
1183 | // The equation of a Riemann circle, where the y position is substituted by the | |
1184 | // measured y-position taking pad tilting into account, has to be transformed | |
1185 | // into a 4-dimensional hyperplane equation | |
1186 | // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 | |
1187 | // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) | |
1188 | // zc: center of the pad row | |
1189 | // zt: z-position of the track | |
1190 | // The z-position of the track is assumed to be linear dependent on the x-position | |
1191 | // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 | |
1192 | // Transformation: u = 2 * x * t | |
1193 | // v = 2 * tan(phiT) * t | |
1194 | // w = 2 * tan(phiT) * (x - xref) * t | |
1195 | // t = 1 / (x^2 + ymeas^2) | |
1196 | // Parameters: a = -1/y0 | |
1197 | // b = x0/y0 | |
1198 | // c = (R^2 -x0^2 - y0^2)/y0 | |
1199 | // d = offset | |
1200 | // e = dz/dx | |
1201 | // If the offset respectively the slope in z-position is impossible, the parameters are fixed using | |
1202 | // results from the simple riemann fit. Afterwards the fit is redone. | |
1203 | // The curvature is calculated according to the formula: | |
1204 | // curv = a/(1 + b^2 + c*a) = 1/R | |
1205 | // | |
1206 | // Paramters: - Array of tracklets (connected to the track candidate) | |
1207 | // - Flag selecting the error definition | |
1208 | // Output: - Chi2 values of the track (in Parameter list) | |
1209 | // | |
1210 | TLinearFitter *fitter = GetTiltedRiemanFitter(); | |
1211 | fitter->StoreData(kTRUE); | |
1212 | fitter->ClearPoints(); | |
1213 | AliTRDLeastSquare zfitter; | |
1214 | AliTRDcluster *cl = 0x0; | |
3b57a3f7 | 1215 | |
1216 | AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; | |
1217 | if(!tracklets){ | |
1218 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ | |
1219 | if(!(tracklet = track->GetTracklet(ipl))) continue; | |
1220 | if(!tracklet->IsOK()) continue; | |
1221 | new(&work[ipl]) AliTRDseedV1(*tracklet); | |
1222 | } | |
1223 | tracklets = &work[0]; | |
1224 | } | |
1225 | ||
41702fec | 1226 | Double_t xref = CalculateReferenceX(tracklets); |
1227 | Double_t x, y, z, t, tilt, dx, w, we; | |
1228 | Double_t uvt[4]; | |
1229 | Int_t nPoints = 0; | |
1230 | // Containers for Least-square fitter | |
1231 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ | |
1232 | if(!tracklets[ipl].IsOK()) continue; | |
1233 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ | |
1234 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; | |
1235 | if (!tracklets[ipl].IsUsable(itb)) continue; | |
1236 | x = cl->GetX(); | |
1237 | y = cl->GetY(); | |
1238 | z = cl->GetZ(); | |
1239 | tilt = tracklets[ipl].GetTilt(); | |
1240 | dx = x - xref; | |
1241 | // Transformation | |
1242 | t = 1./(x*x + y*y); | |
1243 | uvt[0] = 2. * x * t; | |
1244 | uvt[1] = t; | |
1245 | uvt[2] = 2. * tilt * t; | |
1246 | uvt[3] = 2. * tilt * dx * t; | |
1247 | w = 2. * (y + tilt*z) * t; | |
1248 | // error definition changes for the different calls | |
1249 | we = 2. * t; | |
1250 | we *= sigError ? tracklets[ipl].GetSigmaY() : 0.2; | |
1251 | fitter->AddPoint(uvt, w, we); | |
1252 | zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); | |
1253 | nPoints++; | |
1254 | } | |
1255 | } | |
aec26713 | 1256 | if(fitter->Eval()) return 1.E10; |
1257 | ||
41702fec | 1258 | Double_t z0 = fitter->GetParameter(3); |
1259 | Double_t dzdx = fitter->GetParameter(4); | |
3b57a3f7 | 1260 | |
1261 | ||
1262 | // Linear fitter - not possible to make boundaries | |
1263 | // Do not accept non possible z and dzdx combinations | |
1264 | Bool_t accept = kTRUE; | |
1265 | Double_t zref = 0.0; | |
1266 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { | |
1267 | if(!tracklets[iLayer].IsOK()) continue; | |
1268 | zref = z0 + dzdx * (tracklets[iLayer].GetX0() - xref); | |
e3cf3d02 | 1269 | if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) |
3b57a3f7 | 1270 | accept = kFALSE; |
1271 | } | |
1272 | if (!accept) { | |
41702fec | 1273 | zfitter.Eval(); |
3b57a3f7 | 1274 | Double_t dzmf = zfitter.GetFunctionParameter(1); |
1275 | Double_t zmf = zfitter.GetFunctionValue(&xref); | |
1276 | fitter->FixParameter(3, zmf); | |
1277 | fitter->FixParameter(4, dzmf); | |
1278 | fitter->Eval(); | |
1279 | fitter->ReleaseParameter(3); | |
1280 | fitter->ReleaseParameter(4); | |
1281 | z0 = fitter->GetParameter(3); // = zmf ? | |
1282 | dzdx = fitter->GetParameter(4); // = dzmf ? | |
1283 | } | |
1284 | ||
1285 | // Calculate Curvature | |
1286 | Double_t a = fitter->GetParameter(0); | |
1287 | Double_t b = fitter->GetParameter(1); | |
1288 | Double_t c = fitter->GetParameter(2); | |
1289 | Double_t y0 = 1. / a; | |
1290 | Double_t x0 = -b * y0; | |
a015e406 | 1291 | Double_t tmp = y0*y0 + x0*x0 - c*y0; |
1292 | if(tmp<=0.) return 1.E10; | |
1293 | Double_t R = TMath::Sqrt(tmp); | |
3b57a3f7 | 1294 | Double_t C = 1.0 + b*b - c*a; |
1295 | if (C > 0.0) C = a / TMath::Sqrt(C); | |
1296 | ||
1297 | // Calculate chi2 of the fit | |
1298 | Double_t chi2 = fitter->GetChisquare()/Double_t(nPoints); | |
1299 | ||
1300 | // Update the tracklets | |
1301 | if(!track){ | |
1302 | for(Int_t ip = 0; ip < kNPlanes; ip++) { | |
1303 | x = tracklets[ip].GetX0(); | |
90cf7133 | 1304 | tmp = R*R-(x-x0)*(x-x0); |
a015e406 | 1305 | if(tmp <= 0.) continue; |
1306 | tmp = TMath::Sqrt(tmp); | |
3b57a3f7 | 1307 | |
1308 | // y: R^2 = (x - x0)^2 + (y - y0)^2 | |
1309 | // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) | |
1310 | tracklets[ip].SetYref(0, y0 - (y0>0.?1.:-1)*tmp); | |
1311 | // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) | |
1312 | tracklets[ip].SetYref(1, (x - x0) / tmp); | |
1313 | tracklets[ip].SetZref(0, z0 + dzdx * (x - xref)); | |
1314 | tracklets[ip].SetZref(1, dzdx); | |
1315 | tracklets[ip].SetC(C); | |
1316 | tracklets[ip].SetChi2(chi2); | |
1317 | } | |
1318 | } | |
3b57a3f7 | 1319 | //update track points array |
1320 | if(np && points){ | |
1321 | Float_t xyz[3]; | |
1322 | for(int ip=0; ip<np; ip++){ | |
1323 | points[ip].GetXYZ(xyz); | |
60e55aee | 1324 | xyz[1] = TMath::Abs(xyz[0] - x0) > R ? 100. : y0 - (y0>0.?1.:-1.)*TMath::Sqrt((R-(xyz[0]-x0))*(R+(xyz[0]-x0))); |
3b57a3f7 | 1325 | xyz[2] = z0 + dzdx * (xyz[0] - xref); |
1326 | points[ip].SetXYZ(xyz); | |
1327 | } | |
1328 | } | |
1329 | ||
3b57a3f7 | 1330 | return chi2; |
1331 | } | |
1332 | ||
1333 | ||
1bf51039 | 1334 | //____________________________________________________________________ |
1335 | Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t up, Int_t np, AliTrackPoint *points) | |
1336 | { | |
1337 | // Kalman filter implementation for the TRD. | |
1338 | // It returns the positions of the fit in the array "points" | |
1339 | // | |
1340 | // Author : A.Bercuci@gsi.de | |
1341 | ||
3cfaffa4 | 1342 | // printf("Start track @ x[%f]\n", track->GetX()); |
1bf51039 | 1343 | |
1344 | //prepare marker points along the track | |
1345 | Int_t ip = np ? 0 : 1; | |
1346 | while(ip<np){ | |
1347 | if((up?-1:1) * (track->GetX() - points[ip].GetX()) > 0.) break; | |
1348 | //printf("AliTRDtrackerV1::FitKalman() : Skip track marker x[%d] = %7.3f. Before track start ( %7.3f ).\n", ip, points[ip].GetX(), track->GetX()); | |
1349 | ip++; | |
1350 | } | |
1351 | //if(points) printf("First marker point @ x[%d] = %f\n", ip, points[ip].GetX()); | |
1352 | ||
1353 | ||
1354 | AliTRDseedV1 tracklet, *ptrTracklet = 0x0; | |
1355 | ||
1356 | //Loop through the TRD planes | |
1357 | for (Int_t jplane = 0; jplane < kNPlanes; jplane++) { | |
1358 | // GET TRACKLET OR BUILT IT | |
1359 | Int_t iplane = up ? jplane : kNPlanes - 1 - jplane; | |
1360 | if(tracklets){ | |
1361 | if(!(ptrTracklet = &tracklets[iplane])) continue; | |
1362 | }else{ | |
1363 | if(!(ptrTracklet = track->GetTracklet(iplane))){ | |
1364 | /*AliTRDtrackerV1 *tracker = 0x0; | |
1365 | if(!(tracker = dynamic_cast<AliTRDtrackerV1*>( AliTRDReconstructor::Tracker()))) continue; | |
1366 | ptrTracklet = new(&tracklet) AliTRDseedV1(iplane); | |
1367 | if(!tracker->MakeTracklet(ptrTracklet, track)) */ | |
1368 | continue; | |
1369 | } | |
1370 | } | |
1371 | if(!ptrTracklet->IsOK()) continue; | |
1372 | ||
1373 | Double_t x = ptrTracklet->GetX0(); | |
1374 | ||
1375 | while(ip < np){ | |
1376 | //don't do anything if next marker is after next update point. | |
1377 | if((up?-1:1) * (points[ip].GetX() - x) - fgkMaxStep < 0) break; | |
1bf51039 | 1378 | if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; |
1379 | ||
1380 | Double_t xyz[3]; // should also get the covariance | |
3cfaffa4 | 1381 | track->GetXYZ(xyz); |
1382 | track->Global2LocalPosition(xyz, track->GetAlpha()); | |
1383 | points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]); | |
1bf51039 | 1384 | ip++; |
1385 | } | |
3cfaffa4 | 1386 | // printf("plane[%d] tracklet[%p] x[%f]\n", iplane, ptrTracklet, x); |
1bf51039 | 1387 | |
3cfaffa4 | 1388 | // Propagate closer to the next update point |
1bf51039 | 1389 | if(((up?-1:1) * (x - track->GetX()) + fgkMaxStep < 0) && !PropagateToX(*track, x + (up?-1:1)*fgkMaxStep, fgkMaxStep)) return -1.; |
1390 | ||
1391 | if(!AdjustSector(track)) return -1; | |
1392 | if(TMath::Abs(track->GetSnp()) > fgkMaxSnp) return -1; | |
1393 | ||
1394 | //load tracklet to the tracker and the track | |
1395 | /* Int_t index; | |
1396 | if((index = FindTracklet(ptrTracklet)) < 0){ | |
1397 | ptrTracklet = SetTracklet(&tracklet); | |
1398 | index = fTracklets->GetEntriesFast()-1; | |
1399 | } | |
1400 | track->SetTracklet(ptrTracklet, index);*/ | |
1401 | ||
1402 | ||
1403 | // register tracklet to track with tracklet creation !! | |
1404 | // PropagateBack : loaded tracklet to the tracker and update index | |
1405 | // RefitInward : update index | |
1406 | // MakeTrack : loaded tracklet to the tracker and update index | |
1407 | if(!tracklets) track->SetTracklet(ptrTracklet, -1); | |
1408 | ||
1409 | ||
1410 | //Calculate the mean material budget along the path inside the chamber | |
1411 | Double_t xyz0[3]; track->GetXYZ(xyz0); | |
1412 | Double_t alpha = track->GetAlpha(); | |
1413 | Double_t xyz1[3], y, z; | |
1414 | if(!track->GetProlongation(x, y, z)) return -1; | |
1415 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); | |
1416 | xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha); | |
1417 | xyz1[2] = z; | |
3cfaffa4 | 1418 | if((xyz0[0] - xyz1[9] < 1e-3) && (xyz0[0] - xyz1[9] < 1e-3)) continue; // check wheter we are at the same global x position |
1bf51039 | 1419 | Double_t param[7]; |
3cfaffa4 | 1420 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param) <=0.) break; |
1bf51039 | 1421 | Double_t xrho = param[0]*param[4]; // density*length |
1422 | Double_t xx0 = param[1]; // radiation length | |
1423 | ||
1424 | //Propagate the track | |
1425 | track->PropagateTo(x, xx0, xrho); | |
1426 | if (!AdjustSector(track)) break; | |
1427 | ||
1428 | //Update track | |
1429 | Double_t chi2 = track->GetPredictedChi2(ptrTracklet); | |
1430 | if(chi2<1e+10) track->Update(ptrTracklet, chi2); | |
1bf51039 | 1431 | if(!up) continue; |
1432 | ||
1433 | //Reset material budget if 2 consecutive gold | |
1434 | if(iplane>0 && track->GetTracklet(iplane-1) && ptrTracklet->GetN() + track->GetTracklet(iplane-1)->GetN() > 20) track->SetBudget(2, 0.); | |
1435 | } // end planes loop | |
1436 | ||
1437 | // extrapolation | |
1438 | while(ip < np){ | |
1439 | if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; | |
1440 | ||
1441 | Double_t xyz[3]; // should also get the covariance | |
3cfaffa4 | 1442 | track->GetXYZ(xyz); |
1443 | track->Global2LocalPosition(xyz, track->GetAlpha()); | |
1444 | points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]); | |
1bf51039 | 1445 | ip++; |
1446 | } | |
1447 | ||
1448 | return track->GetChi2(); | |
1449 | } | |
3b57a3f7 | 1450 | |
eb38ed55 | 1451 | //_________________________________________________________________________ |
bb56afff | 1452 | Float_t AliTRDtrackerV1::CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref) |
eb38ed55 | 1453 | { |
41702fec | 1454 | // |
1455 | // Calculates the chi2-value of the track in z-Direction including tilting pad correction. | |
1456 | // A linear dependence on the x-value serves as a model. | |
1457 | // The parameters are related to the tilted Riemann fit. | |
1458 | // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate | |
1459 | // - the offset for the reference x | |
1460 | // - the slope | |
1461 | // - the reference x position | |
1462 | // Output: - The Chi2 value of the track in z-Direction | |
1463 | // | |
1464 | Float_t chi2Z = 0, nLayers = 0; | |
053767a4 | 1465 | for (Int_t iLayer = 0; iLayer < AliTRDgeometry::kNlayer; iLayer++) { |
41702fec | 1466 | if(!tracklets[iLayer].IsOK()) continue; |
1467 | Double_t z = offset + slope * (tracklets[iLayer].GetX0() - xref); | |
e3cf3d02 | 1468 | chi2Z += TMath::Abs(tracklets[iLayer].GetZfit(0) - z); |
41702fec | 1469 | nLayers++; |
1470 | } | |
1471 | chi2Z /= TMath::Max((nLayers - 3.0),1.0); | |
1472 | return chi2Z; | |
eb38ed55 | 1473 | } |
1474 | ||
bccda319 | 1475 | //_____________________________________________________________________________ |
1476 | Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep) | |
1477 | { | |
41702fec | 1478 | // |
1479 | // Starting from current X-position of track <t> this function | |
1480 | // extrapolates the track up to radial position <xToGo>. | |
1481 | // Returns 1 if track reaches the plane, and 0 otherwise | |
1482 | // | |
bccda319 | 1483 | |
41702fec | 1484 | const Double_t kEpsilon = 0.00001; |
bccda319 | 1485 | |
41702fec | 1486 | // Current track X-position |
1487 | Double_t xpos = t.GetX(); | |
bccda319 | 1488 | |
41702fec | 1489 | // Direction: inward or outward |
1490 | Double_t dir = (xpos < xToGo) ? 1.0 : -1.0; | |
bccda319 | 1491 | |
41702fec | 1492 | while (((xToGo - xpos) * dir) > kEpsilon) { |
bccda319 | 1493 | |
41702fec | 1494 | Double_t xyz0[3]; |
1495 | Double_t xyz1[3]; | |
1496 | Double_t param[7]; | |
1497 | Double_t x; | |
1498 | Double_t y; | |
1499 | Double_t z; | |
bccda319 | 1500 | |
41702fec | 1501 | // The next step size |
1502 | Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep); | |
bccda319 | 1503 | |
41702fec | 1504 | // Get the global position of the starting point |
1505 | t.GetXYZ(xyz0); | |
bccda319 | 1506 | |
41702fec | 1507 | // X-position after next step |
1508 | x = xpos + step; | |
bccda319 | 1509 | |
41702fec | 1510 | // Get local Y and Z at the X-position of the next step |
1511 | if (!t.GetProlongation(x,y,z)) { | |
1512 | return 0; // No prolongation possible | |
1513 | } | |
bccda319 | 1514 | |
41702fec | 1515 | // The global position of the end point of this prolongation step |
1516 | xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha()); | |
1517 | xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha()); | |
1518 | xyz1[2] = z; | |
bccda319 | 1519 | |
41702fec | 1520 | // Calculate the mean material budget between start and |
1521 | // end point of this prolongation step | |
83dea92e | 1522 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return 0; |
bccda319 | 1523 | |
41702fec | 1524 | // Propagate the track to the X-position after the next step |
9c87a076 | 1525 | if (!t.PropagateTo(x, param[1], param[0]*param[4])) return 0; |
bccda319 | 1526 | |
41702fec | 1527 | // Rotate the track if necessary |
1528 | AdjustSector(&t); | |
bccda319 | 1529 | |
41702fec | 1530 | // New track X-position |
1531 | xpos = t.GetX(); | |
bccda319 | 1532 | |
41702fec | 1533 | } |
bccda319 | 1534 | |
41702fec | 1535 | return 1; |
bccda319 | 1536 | |
1537 | } | |
1538 | ||
eb38ed55 | 1539 | |
1540 | //_____________________________________________________________________________ | |
1541 | Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) const | |
1542 | { | |
41702fec | 1543 | // |
1544 | // Reads AliTRDclusters from the file. | |
1545 | // The names of the cluster tree and branches | |
1546 | // should match the ones used in AliTRDclusterizer::WriteClusters() | |
1547 | // | |
1548 | ||
1549 | Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster))); | |
1550 | TObjArray *clusterArray = new TObjArray(nsize+1000); | |
1551 | ||
1552 | TBranch *branch = clusterTree->GetBranch("TRDcluster"); | |
1553 | if (!branch) { | |
1554 | AliError("Can't get the branch !"); | |
1555 | return 1; | |
1556 | } | |
1557 | branch->SetAddress(&clusterArray); | |
1558 | ||
1559 | if(!fClusters){ | |
8ae98148 | 1560 | Float_t nclusters = fReconstructor->GetRecoParam()->GetNClusters(); |
1561 | if(fReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; | |
1562 | array = new TClonesArray("AliTRDcluster", Int_t(nclusters)); | |
41702fec | 1563 | array->SetOwner(kTRUE); |
1564 | } | |
1565 | ||
1566 | // Loop through all entries in the tree | |
1567 | Int_t nEntries = (Int_t) clusterTree->GetEntries(); | |
1568 | Int_t nbytes = 0; | |
1569 | Int_t ncl = 0; | |
1570 | AliTRDcluster *c = 0x0; | |
1571 | for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) { | |
1572 | // Import the tree | |
1573 | nbytes += clusterTree->GetEvent(iEntry); | |
1574 | ||
1575 | // Get the number of points in the detector | |
1576 | Int_t nCluster = clusterArray->GetEntriesFast(); | |
1577 | for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) { | |
1578 | if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue; | |
1579 | c->SetInChamber(); | |
1580 | new((*fClusters)[ncl++]) AliTRDcluster(*c); | |
1581 | delete (clusterArray->RemoveAt(iCluster)); | |
1582 | } | |
1583 | ||
1584 | } | |
1585 | delete clusterArray; | |
1586 | ||
1587 | return 0; | |
eb38ed55 | 1588 | } |
1589 | ||
1590 | //_____________________________________________________________________________ | |
1591 | Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree) | |
1592 | { | |
41702fec | 1593 | // |
66f6bfd9 | 1594 | // Fills clusters into TRD tracking sectors |
41702fec | 1595 | // |
41702fec | 1596 | |
48f8adf3 | 1597 | if(!fReconstructor->IsWritingClusters()){ |
1598 | fClusters = AliTRDReconstructor::GetClusters(); | |
1599 | } else { | |
66f6bfd9 | 1600 | if (ReadClusters(fClusters, cTree)) { |
1601 | AliError("Problem with reading the clusters !"); | |
1602 | return 1; | |
1603 | } | |
1604 | } | |
1605 | SetClustersOwner(); | |
1606 | ||
48f8adf3 | 1607 | if(!fClusters || !fClusters->GetEntriesFast()){ |
66f6bfd9 | 1608 | AliInfo("No TRD clusters"); |
41702fec | 1609 | return 1; |
1610 | } | |
66f6bfd9 | 1611 | |
1612 | //Int_t nin = | |
1613 | BuildTrackingContainers(); | |
1614 | ||
1615 | //Int_t ncl = fClusters->GetEntriesFast(); | |
1616 | //AliInfo(Form("Clusters %d [%6.2f %% in the active volume]", ncl, 100.*float(nin)/ncl)); | |
1617 | ||
1618 | return 0; | |
1619 | } | |
1620 | ||
1621 | //_____________________________________________________________________________ | |
1622 | Int_t AliTRDtrackerV1::LoadClusters(TClonesArray *clusters) | |
1623 | { | |
1624 | // | |
1625 | // Fills clusters into TRD tracking sectors | |
1626 | // Function for use in the HLT | |
1627 | ||
1628 | if(!clusters || !clusters->GetEntriesFast()){ | |
1629 | AliInfo("No TRD clusters"); | |
41702fec | 1630 | return 1; |
1631 | } | |
1632 | ||
66f6bfd9 | 1633 | fClusters = clusters; |
1634 | SetClustersOwner(); | |
1635 | ||
1636 | //Int_t nin = | |
1637 | BuildTrackingContainers(); | |
1638 | ||
1639 | //Int_t ncl = fClusters->GetEntriesFast(); | |
1640 | //AliInfo(Form("Clusters %d [%6.2f %% in the active volume]", ncl, 100.*float(nin)/ncl)); | |
1641 | ||
1642 | return 0; | |
1643 | } | |
1644 | ||
1645 | ||
1646 | //____________________________________________________________________ | |
1647 | Int_t AliTRDtrackerV1::BuildTrackingContainers() | |
1648 | { | |
1649 | // Building tracking containers for clusters | |
1650 | ||
1651 | Int_t nin =0, icl = fClusters->GetEntriesFast(); | |
41702fec | 1652 | while (icl--) { |
1653 | AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(icl); | |
1654 | if(c->IsInChamber()) nin++; | |
1655 | Int_t detector = c->GetDetector(); | |
1656 | Int_t sector = fGeom->GetSector(detector); | |
053767a4 | 1657 | Int_t stack = fGeom->GetStack(detector); |
1658 | Int_t layer = fGeom->GetLayer(detector); | |
41702fec | 1659 | |
053767a4 | 1660 | fTrSec[sector].GetChamber(stack, layer, kTRUE)->InsertCluster(c, icl); |
41702fec | 1661 | } |
b0a48c4d | 1662 | |
1663 | const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); | |
053767a4 | 1664 | for(int isector =0; isector<AliTRDgeometry::kNsector; isector++){ |
41702fec | 1665 | if(!fTrSec[isector].GetNChambers()) continue; |
b0a48c4d | 1666 | fTrSec[isector].Init(fReconstructor, cal); |
41702fec | 1667 | } |
66f6bfd9 | 1668 | |
1669 | return nin; | |
eb38ed55 | 1670 | } |
1671 | ||
1672 | ||
66f6bfd9 | 1673 | |
0906e73e | 1674 | //____________________________________________________________________ |
1675 | void AliTRDtrackerV1::UnloadClusters() | |
1676 | { | |
41702fec | 1677 | // |
1678 | // Clears the arrays of clusters and tracks. Resets sectors and timebins | |
1679 | // | |
0906e73e | 1680 | |
41702fec | 1681 | if(fTracks) fTracks->Delete(); |
1682 | if(fTracklets) fTracklets->Delete(); | |
48f8adf3 | 1683 | if(fClusters){ |
1684 | if(IsClustersOwner()) fClusters->Delete(); | |
1685 | ||
1686 | // save clusters array in the reconstructor for further use. | |
1687 | if(!fReconstructor->IsWritingClusters()){ | |
1688 | AliTRDReconstructor::SetClusters(fClusters); | |
1689 | SetClustersOwner(kFALSE); | |
1690 | } else AliTRDReconstructor::SetClusters(0x0); | |
1691 | } | |
0906e73e | 1692 | |
053767a4 | 1693 | for (int i = 0; i < AliTRDgeometry::kNsector; i++) fTrSec[i].Clear(); |
0906e73e | 1694 | |
41702fec | 1695 | // Increment the Event Number |
1696 | AliTRDtrackerDebug::SetEventNumber(AliTRDtrackerDebug::GetEventNumber() + 1); | |
eb38ed55 | 1697 | } |
0906e73e | 1698 | |
b1957d3c | 1699 | //____________________________________________________________________ |
1700 | void AliTRDtrackerV1::UseClusters(const AliKalmanTrack *t, Int_t) const | |
1701 | { | |
1702 | const AliTRDtrackV1 *track = dynamic_cast<const AliTRDtrackV1*>(t); | |
1703 | if(!track) return; | |
1704 | ||
1705 | AliTRDseedV1 *tracklet = 0x0; | |
1706 | for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){ | |
1707 | if(!(tracklet = track->GetTracklet(ily))) continue; | |
1708 | AliTRDcluster *c = 0x0; | |
1709 | for(Int_t ic=AliTRDseed::knTimebins; ic--;){ | |
1710 | if(!(c=tracklet->GetClusters(ic))) continue; | |
1711 | c->Use(); | |
1712 | } | |
1713 | } | |
1714 | } | |
1715 | ||
1716 | ||
eb38ed55 | 1717 | //_____________________________________________________________________________ |
1718 | Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track) | |
1719 | { | |
41702fec | 1720 | // |
1721 | // Rotates the track when necessary | |
1722 | // | |
1723 | ||
1724 | Double_t alpha = AliTRDgeometry::GetAlpha(); | |
1725 | Double_t y = track->GetY(); | |
1726 | Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha); | |
3cfaffa4 | 1727 | |
41702fec | 1728 | if (y > ymax) { |
1729 | if (!track->Rotate( alpha)) { | |
1730 | return kFALSE; | |
1731 | } | |
1732 | } | |
1733 | else if (y < -ymax) { | |
1734 | if (!track->Rotate(-alpha)) { | |
1735 | return kFALSE; | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | return kTRUE; | |
0906e73e | 1740 | |
1741 | } | |
1742 | ||
eb38ed55 | 1743 | |
0906e73e | 1744 | //____________________________________________________________________ |
1745 | AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *track, Int_t p, Int_t &idx) | |
1746 | { | |
41702fec | 1747 | // Find tracklet for TRD track <track> |
1748 | // Parameters | |
1749 | // - track | |
1750 | // - sector | |
1751 | // - plane | |
1752 | // - index | |
1753 | // Output | |
1754 | // tracklet | |
1755 | // index | |
1756 | // Detailed description | |
1757 | // | |
1758 | idx = track->GetTrackletIndex(p); | |
1759 | AliTRDseedV1 *tracklet = (idx==0xffff) ? 0x0 : (AliTRDseedV1*)fTracklets->UncheckedAt(idx); | |
1760 | ||
1761 | return tracklet; | |
0906e73e | 1762 | } |
1763 | ||
1764 | //____________________________________________________________________ | |
3b57a3f7 | 1765 | AliTRDseedV1* AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet) |
0906e73e | 1766 | { |
41702fec | 1767 | // Add this tracklet to the list of tracklets stored in the tracker |
1768 | // | |
1769 | // Parameters | |
1770 | // - tracklet : pointer to the tracklet to be added to the list | |
1771 | // | |
1772 | // Output | |
1773 | // - the index of the new tracklet in the tracker tracklets list | |
1774 | // | |
1775 | // Detailed description | |
1776 | // Build the tracklets list if it is not yet created (late initialization) | |
1777 | // and adds the new tracklet to the list. | |
1778 | // | |
1779 | if(!fTracklets){ | |
053767a4 | 1780 | fTracklets = new TClonesArray("AliTRDseedV1", AliTRDgeometry::Nsector()*kMaxTracksStack); |
41702fec | 1781 | fTracklets->SetOwner(kTRUE); |
1782 | } | |
1783 | Int_t nentries = fTracklets->GetEntriesFast(); | |
1784 | return new ((*fTracklets)[nentries]) AliTRDseedV1(*tracklet); | |
972ef65e | 1785 | } |
1786 | ||
d20df6fc | 1787 | //____________________________________________________________________ |
1788 | AliTRDtrackV1* AliTRDtrackerV1::SetTrack(AliTRDtrackV1 *track) | |
1789 | { | |
1790 | // Add this track to the list of tracks stored in the tracker | |
1791 | // | |
1792 | // Parameters | |
1793 | // - track : pointer to the track to be added to the list | |
1794 | // | |
1795 | // Output | |
1796 | // - the pointer added | |
1797 | // | |
1798 | // Detailed description | |
1799 | // Build the tracks list if it is not yet created (late initialization) | |
1800 | // and adds the new track to the list. | |
1801 | // | |
1802 | if(!fTracks){ | |
053767a4 | 1803 | fTracks = new TClonesArray("AliTRDtrackV1", AliTRDgeometry::Nsector()*kMaxTracksStack); |
d20df6fc | 1804 | fTracks->SetOwner(kTRUE); |
1805 | } | |
1806 | Int_t nentries = fTracks->GetEntriesFast(); | |
1807 | return new ((*fTracks)[nentries]) AliTRDtrackV1(*track); | |
1808 | } | |
1809 | ||
1810 | ||
0906e73e | 1811 | |
e4f2f73d | 1812 | //____________________________________________________________________ |
eb38ed55 | 1813 | Int_t AliTRDtrackerV1::Clusters2TracksSM(Int_t sector, AliESDEvent *esd) |
e4f2f73d | 1814 | { |
41702fec | 1815 | // |
1816 | // Steer tracking for one SM. | |
1817 | // | |
1818 | // Parameters : | |
1819 | // sector : Array of (SM) propagation layers containing clusters | |
1820 | // esd : The current ESD event. On output it contains the also | |
1821 | // the ESD (TRD) tracks found in this SM. | |
1822 | // | |
1823 | // Output : | |
1824 | // Number of tracks found in this TRD supermodule. | |
1825 | // | |
1826 | // Detailed description | |
1827 | // | |
1828 | // 1. Unpack AliTRDpropagationLayers objects for each stack. | |
1829 | // 2. Launch stack tracking. | |
1830 | // See AliTRDtrackerV1::Clusters2TracksStack() for details. | |
1831 | // 3. Pack results in the ESD event. | |
1832 | // | |
1833 | ||
1834 | // allocate space for esd tracks in this SM | |
1835 | TClonesArray esdTrackList("AliESDtrack", 2*kMaxTracksStack); | |
1836 | esdTrackList.SetOwner(); | |
1837 | ||
1838 | Int_t nTracks = 0; | |
1839 | Int_t nChambers = 0; | |
1840 | AliTRDtrackingChamber **stack = 0x0, *chamber = 0x0; | |
053767a4 | 1841 | for(int istack = 0; istack<AliTRDgeometry::kNstack; istack++){ |
41702fec | 1842 | if(!(stack = fTrSec[sector].GetStack(istack))) continue; |
1843 | nChambers = 0; | |
053767a4 | 1844 | for(int ilayer=0; ilayer<AliTRDgeometry::kNlayer; ilayer++){ |
1845 | if(!(chamber = stack[ilayer])) continue; | |
3a039a31 | 1846 | if(chamber->GetNClusters() < fgNTimeBins * fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; |
41702fec | 1847 | nChambers++; |
053767a4 | 1848 | //AliInfo(Form("sector %d stack %d layer %d clusters %d", sector, istack, ilayer, chamber->GetNClusters())); |
41702fec | 1849 | } |
1850 | if(nChambers < 4) continue; | |
1851 | //AliInfo(Form("Doing stack %d", istack)); | |
1852 | nTracks += Clusters2TracksStack(stack, &esdTrackList); | |
1853 | } | |
1854 | //AliInfo(Form("Found %d tracks in SM %d [%d]\n", nTracks, sector, esd->GetNumberOfTracks())); | |
1855 | ||
1856 | for(int itrack=0; itrack<nTracks; itrack++) | |
1857 | esd->AddTrack((AliESDtrack*)esdTrackList[itrack]); | |
1858 | ||
1859 | // Reset Track and Candidate Number | |
1860 | AliTRDtrackerDebug::SetCandidateNumber(0); | |
1861 | AliTRDtrackerDebug::SetTrackNumber(0); | |
1862 | return nTracks; | |
e4f2f73d | 1863 | } |
1864 | ||
1865 | //____________________________________________________________________ | |
eb38ed55 | 1866 | Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList) |
e4f2f73d | 1867 | { |
41702fec | 1868 | // |
1869 | // Make tracks in one TRD stack. | |
1870 | // | |
1871 | // Parameters : | |
1872 | // layer : Array of stack propagation layers containing clusters | |
1873 | // esdTrackList : Array of ESD tracks found by the stand alone tracker. | |
1874 | // On exit the tracks found in this stack are appended. | |
1875 | // | |
1876 | // Output : | |
1877 | // Number of tracks found in this stack. | |
1878 | // | |
1879 | // Detailed description | |
1880 | // | |
1881 | // 1. Find the 3 most useful seeding chambers. See BuildSeedingConfigs() for details. | |
1882 | // 2. Steer AliTRDtrackerV1::MakeSeeds() for 3 seeding layer configurations. | |
1883 | // See AliTRDtrackerV1::MakeSeeds() for more details. | |
1884 | // 3. Arrange track candidates in decreasing order of their quality | |
1885 | // 4. Classify tracks in 5 categories according to: | |
1886 | // a) number of layers crossed | |
1887 | // b) track quality | |
1888 | // 5. Sign clusters by tracks in decreasing order of track quality | |
1889 | // 6. Build AliTRDtrack out of seeding tracklets | |
1890 | // 7. Cook MC label | |
1891 | // 8. Build ESD track and register it to the output list | |
1892 | // | |
1893 | ||
b0a48c4d | 1894 | const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); |
41702fec | 1895 | AliTRDtrackingChamber *chamber = 0x0; |
1896 | AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized | |
1897 | Int_t pars[4]; // MakeSeeds parameters | |
1898 | ||
1899 | //Double_t alpha = AliTRDgeometry::GetAlpha(); | |
1900 | //Double_t shift = .5 * alpha; | |
1901 | Int_t configs[kNConfigs]; | |
1902 | ||
1903 | // Build initial seeding configurations | |
1904 | Double_t quality = BuildSeedingConfigs(stack, configs); | |
3a039a31 | 1905 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec | 1906 | AliInfo(Form("Plane config %d %d %d Quality %f" |
1907 | , configs[0], configs[1], configs[2], quality)); | |
1908 | } | |
d931f2aa | 1909 | |
41702fec | 1910 | |
1911 | // Initialize contors | |
1912 | Int_t ntracks, // number of TRD track candidates | |
1913 | ntracks1, // number of registered TRD tracks/iter | |
1914 | ntracks2 = 0; // number of all registered TRD tracks in stack | |
1915 | fSieveSeeding = 0; | |
d931f2aa | 1916 | |
1917 | // Get stack index | |
1918 | Int_t ic = 0; AliTRDtrackingChamber **cIter = &stack[0]; | |
1919 | while(ic<kNPlanes && !(*cIter)){ic++; cIter++;} | |
1920 | if(!(*cIter)) return ntracks2; | |
1921 | Int_t istack = fGeom->GetStack((*cIter)->GetDetector()); | |
1922 | ||
41702fec | 1923 | do{ |
1924 | // Loop over seeding configurations | |
1925 | ntracks = 0; ntracks1 = 0; | |
1926 | for (Int_t iconf = 0; iconf<3; iconf++) { | |
1927 | pars[0] = configs[iconf]; | |
1928 | pars[1] = ntracks; | |
d931f2aa | 1929 | pars[2] = istack; |
41702fec | 1930 | ntracks = MakeSeeds(stack, &sseed[6*ntracks], pars); |
1931 | if(ntracks == kMaxTracksStack) break; | |
1932 | } | |
3a039a31 | 1933 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1) AliInfo(Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding)); |
41702fec | 1934 | |
1935 | if(!ntracks) break; | |
1936 | ||
1937 | // Sort the seeds according to their quality | |
1938 | Int_t sort[kMaxTracksStack]; | |
1939 | TMath::Sort(ntracks, fTrackQuality, sort, kTRUE); | |
1940 | ||
1941 | // Initialize number of tracks so far and logic switches | |
1942 | Int_t ntracks0 = esdTrackList->GetEntriesFast(); | |
1943 | Bool_t signedTrack[kMaxTracksStack]; | |
1944 | Bool_t fakeTrack[kMaxTracksStack]; | |
1945 | for (Int_t i=0; i<ntracks; i++){ | |
1946 | signedTrack[i] = kFALSE; | |
1947 | fakeTrack[i] = kFALSE; | |
1948 | } | |
1949 | //AliInfo("Selecting track candidates ..."); | |
1950 | ||
1951 | // Sieve clusters in decreasing order of track quality | |
1952 | Double_t trackParams[7]; | |
1953 | // AliTRDseedV1 *lseed = 0x0; | |
1954 | Int_t jSieve = 0, candidates; | |
1955 | do{ | |
1956 | //AliInfo(Form("\t\tITER = %i ", jSieve)); | |
1957 | ||
1958 | // Check track candidates | |
1959 | candidates = 0; | |
1960 | for (Int_t itrack = 0; itrack < ntracks; itrack++) { | |
804bb02e | 1961 | Int_t trackIndex = sort[itrack]; |
1962 | if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue; | |
41702fec | 1963 | |
1964 | ||
804bb02e | 1965 | // Calculate track parameters from tracklets seeds |
804bb02e | 1966 | Int_t ncl = 0; |
1967 | Int_t nused = 0; | |
1968 | Int_t nlayers = 0; | |
1969 | Int_t findable = 0; | |
1970 | for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) { | |
1971 | Int_t jseed = kNPlanes*trackIndex+jLayer; | |
1972 | if(!sseed[jseed].IsOK()) continue; | |
1973 | if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.15) findable++; | |
1974 | ||
1975 | sseed[jseed].UpdateUsed(); | |
1976 | ncl += sseed[jseed].GetN2(); | |
1977 | nused += sseed[jseed].GetNUsed(); | |
1978 | nlayers++; | |
804bb02e | 1979 | } |
1980 | ||
41702fec | 1981 | // Filter duplicated tracks |
1982 | if (nused > 30){ | |
1983 | //printf("Skip %d nused %d\n", trackIndex, nused); | |
1984 | fakeTrack[trackIndex] = kTRUE; | |
1985 | continue; | |
1986 | } | |
1987 | if (Float_t(nused)/ncl >= .25){ | |
1988 | //printf("Skip %d nused/ncl >= .25\n", trackIndex); | |
1989 | fakeTrack[trackIndex] = kTRUE; | |
1990 | continue; | |
1991 | } | |
1992 | ||
1993 | // Classify tracks | |
1994 | Bool_t skip = kFALSE; | |
1995 | switch(jSieve){ | |
1996 | case 0: | |
1997 | if(nlayers < 6) {skip = kTRUE; break;} | |
1998 | if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} | |
1999 | break; | |
2000 | ||
2001 | case 1: | |
2002 | if(nlayers < findable){skip = kTRUE; break;} | |
2003 | if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;} | |
2004 | break; | |
2005 | ||
2006 | case 2: | |
2007 | if ((nlayers == findable) || (nlayers == 6)) { skip = kTRUE; break;} | |
2008 | if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;} | |
2009 | break; | |
2010 | ||
2011 | case 3: | |
2012 | if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} | |
2013 | break; | |
2014 | ||
2015 | case 4: | |
2016 | if (nlayers == 3){skip = kTRUE; break;} | |
2017 | //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;} | |
2018 | break; | |
2019 | } | |
2020 | if(skip){ | |
2021 | candidates++; | |
2022 | //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused); | |
2023 | continue; | |
2024 | } | |
2025 | signedTrack[trackIndex] = kTRUE; | |
2026 | ||
41702fec | 2027 | |
2028 | // Sign clusters | |
2029 | AliTRDcluster *cl = 0x0; Int_t clusterIndex = -1; | |
be24510a | 2030 | for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) { |
41702fec | 2031 | Int_t jseed = kNPlanes*trackIndex+jLayer; |
2032 | if(!sseed[jseed].IsOK()) continue; | |
2033 | if(TMath::Abs(sseed[jseed].GetYfit(1) - sseed[jseed].GetYfit(1)) >= .2) continue; // check this condition with Marian | |
2034 | sseed[jseed].UseClusters(); | |
2035 | if(!cl){ | |
90cf7133 | 2036 | ic = 0; |
41702fec | 2037 | while(!(cl = sseed[jseed].GetClusters(ic))) ic++; |
2038 | clusterIndex = sseed[jseed].GetIndexes(ic); | |
2039 | } | |
2040 | } | |
2041 | if(!cl) continue; | |
2042 | ||
2043 | ||
2044 | // Build track parameters | |
2045 | AliTRDseedV1 *lseed =&sseed[trackIndex*6]; | |
e79f8eb0 | 2046 | /* Int_t idx = 0; |
41702fec | 2047 | while(idx<3 && !lseed->IsOK()) { |
2048 | idx++; | |
2049 | lseed++; | |
e79f8eb0 | 2050 | }*/ |
e79f8eb0 | 2051 | Double_t x = lseed->GetX0();// - 3.5; |
41702fec | 2052 | trackParams[0] = x; //NEW AB |
e79f8eb0 | 2053 | trackParams[1] = lseed->GetYref(0); // lseed->GetYat(x); |
2054 | trackParams[2] = lseed->GetZref(0); // lseed->GetZat(x); | |
2055 | trackParams[3] = TMath::Sin(TMath::ATan(lseed->GetYref(1))); | |
41702fec | 2056 | trackParams[4] = lseed->GetZref(1) / TMath::Sqrt(1. + lseed->GetYref(1) * lseed->GetYref(1)); |
be24510a | 2057 | trackParams[5] = lseed->GetC(); |
41702fec | 2058 | Int_t ich = 0; while(!(chamber = stack[ich])) ich++; |
2059 | trackParams[6] = fGeom->GetSector(chamber->GetDetector());/* *alpha+shift; // Supermodule*/ | |
2060 | ||
3a039a31 | 2061 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec | 2062 | AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1])); |
2063 | ||
2064 | Int_t nclusters = 0; | |
2065 | AliTRDseedV1 *dseed[6]; | |
804bb02e | 2066 | |
2067 | // Build track label - what happens if measured data ??? | |
2068 | Int_t labels[1000]; | |
2069 | Int_t outlab[1000]; | |
2070 | Int_t nlab = 0; | |
d877f55f | 2071 | |
2072 | Int_t labelsall[1000]; | |
2073 | Int_t nlabelsall = 0; | |
2074 | Int_t naccepted = 0; | |
2075 | ||
804bb02e | 2076 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
2077 | Int_t jseed = kNPlanes*trackIndex+iLayer; | |
2078 | dseed[iLayer] = new AliTRDseedV1(sseed[jseed]); | |
2079 | dseed[iLayer]->SetOwner(); | |
2080 | nclusters += sseed[jseed].GetN2(); | |
2081 | if(!sseed[jseed].IsOK()) continue; | |
2082 | for(int ilab=0; ilab<2; ilab++){ | |
2083 | if(sseed[jseed].GetLabels(ilab) < 0) continue; | |
2084 | labels[nlab] = sseed[jseed].GetLabels(ilab); | |
2085 | nlab++; | |
2086 | } | |
d877f55f | 2087 | |
2088 | // Cooking label | |
2089 | for (Int_t itime = 0; itime < fgNTimeBins; itime++) { | |
2090 | if(!sseed[jseed].IsUsable(itime)) continue; | |
2091 | naccepted++; | |
2092 | Int_t tindex = 0, ilab = 0; | |
2093 | while(ilab<3 && (tindex = sseed[jseed].GetClusters(itime)->GetLabel(ilab)) >= 0){ | |
2094 | labelsall[nlabelsall++] = tindex; | |
2095 | ilab++; | |
2096 | } | |
2097 | } | |
41702fec | 2098 | } |
804bb02e | 2099 | Freq(nlab,labels,outlab,kFALSE); |
2100 | Int_t label = outlab[0]; | |
2101 | Int_t frequency = outlab[1]; | |
2102 | Freq(nlabelsall,labelsall,outlab,kFALSE); | |
2103 | Int_t label1 = outlab[0]; | |
2104 | Int_t label2 = outlab[2]; | |
2105 | Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted); | |
2106 | ||
41702fec | 2107 | //Int_t eventNrInFile = esd->GetEventNumberInFile(); |
2108 | //AliInfo(Form("Number of clusters %d.", nclusters)); | |
2109 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); | |
2110 | Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber(); | |
2111 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
29f95561 | 2112 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 2113 | cstreamer << "Clusters2TracksStack" |
2114 | << "EventNumber=" << eventNumber | |
2115 | << "TrackNumber=" << trackNumber | |
2116 | << "CandidateNumber=" << candidateNumber | |
2117 | << "Iter=" << fSieveSeeding | |
2118 | << "Like=" << fTrackQuality[trackIndex] | |
2119 | << "S0.=" << dseed[0] | |
2120 | << "S1.=" << dseed[1] | |
2121 | << "S2.=" << dseed[2] | |
2122 | << "S3.=" << dseed[3] | |
2123 | << "S4.=" << dseed[4] | |
2124 | << "S5.=" << dseed[5] | |
2125 | << "p0=" << trackParams[0] | |
2126 | << "p1=" << trackParams[1] | |
2127 | << "p2=" << trackParams[2] | |
2128 | << "p3=" << trackParams[3] | |
2129 | << "p4=" << trackParams[4] | |
2130 | << "p5=" << trackParams[5] | |
2131 | << "p6=" << trackParams[6] | |
2132 | << "Label=" << label | |
2133 | << "Label1=" << label1 | |
2134 | << "Label2=" << label2 | |
2135 | << "FakeRatio=" << fakeratio | |
2136 | << "Freq=" << frequency | |
2137 | << "Ncl=" << ncl | |
2138 | << "NLayers=" << nlayers | |
2139 | << "Findable=" << findable | |
41702fec | 2140 | << "NUsed=" << nused |
2141 | << "\n"; | |
2142 | } | |
2143 | ||
2144 | AliTRDtrackV1 *track = MakeTrack(&sseed[trackIndex*kNPlanes], trackParams); | |
2145 | if(!track){ | |
2146 | AliWarning("Fail to build a TRD Track."); | |
2147 | continue; | |
2148 | } | |
76b60503 | 2149 | |
41702fec | 2150 | //AliInfo("End of MakeTrack()"); |
098c3c3d | 2151 | AliESDtrack *esdTrack = new ((*esdTrackList)[ntracks0++]) AliESDtrack(); |
2152 | esdTrack->UpdateTrackParams(track, AliESDtrack::kTRDout); | |
2153 | esdTrack->SetLabel(track->GetLabel()); | |
2154 | track->UpdateESDtrack(esdTrack); | |
41702fec | 2155 | // write ESD-friends if neccessary |
3a039a31 | 2156 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
41702fec | 2157 | AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track); |
2158 | calibTrack->SetOwner(); | |
098c3c3d | 2159 | esdTrack->AddCalibObject(calibTrack); |
41702fec | 2160 | } |
41702fec | 2161 | ntracks1++; |
2162 | AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1); | |
2163 | } | |
2164 | ||
2165 | jSieve++; | |
2166 | } while(jSieve<5 && candidates); // end track candidates sieve | |
2167 | if(!ntracks1) break; | |
2168 | ||
2169 | // increment counters | |
2170 | ntracks2 += ntracks1; | |
4302c900 | 2171 | |
2172 | if(fReconstructor->IsHLT()) break; | |
41702fec | 2173 | fSieveSeeding++; |
2174 | ||
2175 | // Rebuild plane configurations and indices taking only unused clusters into account | |
2176 | quality = BuildSeedingConfigs(stack, configs); | |
3a039a31 | 2177 | if(quality < 1.E-7) break; //fReconstructor->GetRecoParam() ->GetPlaneQualityThreshold()) break; |
41702fec | 2178 | |
2179 | for(Int_t ip = 0; ip < kNPlanes; ip++){ | |
2180 | if(!(chamber = stack[ip])) continue; | |
b0a48c4d | 2181 | chamber->Build(fGeom, cal);//Indices(fSieveSeeding); |
41702fec | 2182 | } |
2183 | ||
3a039a31 | 2184 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec | 2185 | AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality)); |
2186 | } | |
2187 | } while(fSieveSeeding<10); // end stack clusters sieve | |
2188 | ||
2189 | ||
2190 | ||
2191 | //AliInfo(Form("Registered TRD tracks %d in stack %d.", ntracks2, pars[1])); | |
2192 | ||
2193 | return ntracks2; | |
e4f2f73d | 2194 | } |
2195 | ||
2196 | //___________________________________________________________________ | |
eb38ed55 | 2197 | Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs) |
e4f2f73d | 2198 | { |
41702fec | 2199 | // |
2200 | // Assign probabilities to chambers according to their | |
2201 | // capability of producing seeds. | |
2202 | // | |
2203 | // Parameters : | |
2204 | // | |
2205 | // layers : Array of stack propagation layers for all 6 chambers in one stack | |
2206 | // configs : On exit array of configuration indexes (see GetSeedingConfig() | |
2207 | // for details) in the decreasing order of their seeding probabilities. | |
2208 | // | |
2209 | // Output : | |
2210 | // | |
2211 | // Return top configuration quality | |
2212 | // | |
2213 | // Detailed description: | |
2214 | // | |
2215 | // To each chamber seeding configuration (see GetSeedingConfig() for | |
2216 | // the list of all configurations) one defines 2 quality factors: | |
2217 | // - an apriori topological quality (see GetSeedingConfig() for details) and | |
2218 | // - a data quality based on the uniformity of the distribution of | |
2219 | // clusters over the x range (time bins population). See CookChamberQA() for details. | |
2220 | // The overall chamber quality is given by the product of this 2 contributions. | |
2221 | // | |
2222 | ||
2223 | Double_t chamberQ[kNPlanes]; | |
2224 | AliTRDtrackingChamber *chamber = 0x0; | |
2225 | for(int iplane=0; iplane<kNPlanes; iplane++){ | |
2226 | if(!(chamber = stack[iplane])) continue; | |
2227 | chamberQ[iplane] = (chamber = stack[iplane]) ? chamber->GetQuality() : 0.; | |
2228 | } | |
2229 | ||
2230 | Double_t tconfig[kNConfigs]; | |
2231 | Int_t planes[4]; | |
2232 | for(int iconf=0; iconf<kNConfigs; iconf++){ | |
2233 | GetSeedingConfig(iconf, planes); | |
2234 | tconfig[iconf] = fgTopologicQA[iconf]; | |
2235 | for(int iplane=0; iplane<4; iplane++) tconfig[iconf] *= chamberQ[planes[iplane]]; | |
2236 | } | |
2237 | ||
2238 | TMath::Sort((Int_t)kNConfigs, tconfig, configs, kTRUE); | |
2239 | // AliInfo(Form("q[%d] = %f", configs[0], tconfig[configs[0]])); | |
2240 | // AliInfo(Form("q[%d] = %f", configs[1], tconfig[configs[1]])); | |
2241 | // AliInfo(Form("q[%d] = %f", configs[2], tconfig[configs[2]])); | |
2242 | ||
2243 | return tconfig[configs[0]]; | |
e4f2f73d | 2244 | } |
2245 | ||
2246 | //____________________________________________________________________ | |
eb38ed55 | 2247 | Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar) |
e4f2f73d | 2248 | { |
41702fec | 2249 | // |
2250 | // Make tracklet seeds in the TRD stack. | |
2251 | // | |
2252 | // Parameters : | |
2253 | // layers : Array of stack propagation layers containing clusters | |
2254 | // sseed : Array of empty tracklet seeds. On exit they are filled. | |
2255 | // ipar : Control parameters: | |
2256 | // ipar[0] -> seeding chambers configuration | |
2257 | // ipar[1] -> stack index | |
2258 | // ipar[2] -> number of track candidates found so far | |
2259 | // | |
2260 | // Output : | |
2261 | // Number of tracks candidates found. | |
2262 | // | |
2263 | // Detailed description | |
2264 | // | |
2265 | // The following steps are performed: | |
2266 | // 1. Select seeding layers from seeding chambers | |
2267 | // 2. Select seeding clusters from the seeding AliTRDpropagationLayerStack. | |
2268 | // The clusters are taken from layer 3, layer 0, layer 1 and layer 2, in | |
2269 | // this order. The parameters controling the range of accepted clusters in | |
2270 | // layer 0, 1, and 2 are defined in AliTRDchamberTimeBin::BuildCond(). | |
2271 | // 3. Helix fit of the cluster set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**)) | |
2272 | // 4. Initialize seeding tracklets in the seeding chambers. | |
2273 | // 5. Filter 0. | |
2274 | // Chi2 in the Y direction less than threshold ... (1./(3. - sLayer)) | |
2275 | // Chi2 in the Z direction less than threshold ... (1./(3. - sLayer)) | |
2276 | // 6. Attach clusters to seeding tracklets and find linear approximation of | |
2277 | // the tracklet (see AliTRDseedV1::AttachClustersIter()). The number of used | |
2278 | // clusters used by current seeds should not exceed ... (25). | |
2279 | // 7. Filter 1. | |
2280 | // All 4 seeding tracklets should be correctly constructed (see | |
2281 | // AliTRDseedV1::AttachClustersIter()) | |
2282 | // 8. Helix fit of the seeding tracklets | |
2283 | // 9. Filter 2. | |
2284 | // Likelihood calculation of the fit. (See AliTRDtrackerV1::CookLikelihood() for details) | |
2285 | // 10. Extrapolation of the helix fit to the other 2 chambers: | |
2286 | // a) Initialization of extrapolation tracklet with fit parameters | |
2287 | // b) Helix fit of tracklets | |
2288 | // c) Attach clusters and linear interpolation to extrapolated tracklets | |
2289 | // d) Helix fit of tracklets | |
2290 | // 11. Improve seeding tracklets quality by reassigning clusters. | |
2291 | // See AliTRDtrackerV1::ImproveSeedQuality() for details. | |
2292 | // 12. Helix fit of all 6 seeding tracklets and chi2 calculation | |
2293 | // 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details. | |
2294 | // 14. Cooking labels for tracklets. Should be done only for MC | |
2295 | // 15. Register seeds. | |
2296 | // | |
2297 | ||
2298 | AliTRDtrackingChamber *chamber = 0x0; | |
be24510a | 2299 | AliTRDcluster *c[kNSeedPlanes] = {0x0, 0x0, 0x0, 0x0}; // initilize seeding clusters |
41702fec | 2300 | AliTRDseedV1 *cseed = &sseed[0]; // initialize tracklets for first track |
2301 | Int_t ncl, mcl; // working variable for looping over clusters | |
2302 | Int_t index[AliTRDchamberTimeBin::kMaxClustersLayer], jndex[AliTRDchamberTimeBin::kMaxClustersLayer]; | |
2303 | // chi2 storage | |
2304 | // chi2[0] = tracklet chi2 on the Z direction | |
2305 | // chi2[1] = tracklet chi2 on the R direction | |
2306 | Double_t chi2[4]; | |
2307 | ||
e79f8eb0 | 2308 | // Default positions for the anode wire in all 6 Layers in case of a stack with missing clusters |
2309 | // Positions taken using cosmic data taken with SM3 after rebuild | |
d931f2aa | 2310 | Double_t x_def[kNPlanes] = {300.2, 312.8, 325.4, 338.0, 350.6, 363.2}; |
41702fec | 2311 | |
2312 | // this should be data member of AliTRDtrack | |
2313 | Double_t seedQuality[kMaxTracksStack]; | |
2314 | ||
2315 | // unpack control parameters | |
2316 | Int_t config = ipar[0]; | |
2317 | Int_t ntracks = ipar[1]; | |
d931f2aa | 2318 | Int_t istack = ipar[2]; |
41702fec | 2319 | Int_t planes[kNSeedPlanes]; GetSeedingConfig(config, planes); |
be24510a | 2320 | Int_t planesExt[kNPlanes-kNSeedPlanes]; GetExtrapolationConfig(config, planesExt); |
2321 | ||
2322 | ||
41702fec | 2323 | // Init chambers geometry |
41702fec | 2324 | Double_t hL[kNPlanes]; // Tilting angle |
2325 | Float_t padlength[kNPlanes]; // pad lenghts | |
2326 | AliTRDpadPlane *pp = 0x0; | |
2327 | for(int iplane=0; iplane<kNPlanes; iplane++){ | |
2328 | pp = fGeom->GetPadPlane(iplane, istack); | |
bb79ccd5 | 2329 | hL[iplane] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle()); |
41702fec | 2330 | padlength[iplane] = pp->GetLengthIPad(); |
2331 | } | |
2332 | ||
3a039a31 | 2333 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec | 2334 | AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks)); |
2335 | } | |
2336 | ||
d931f2aa | 2337 | // Build seeding layers |
d611c74f | 2338 | ResetSeedTB(); |
41702fec | 2339 | Int_t nlayers = 0; |
41702fec | 2340 | for(int isl=0; isl<kNSeedPlanes; isl++){ |
2341 | if(!(chamber = stack[planes[isl]])) continue; | |
3a039a31 | 2342 | if(!chamber->GetSeedingLayer(fSeedTB[isl], fGeom, fReconstructor)) continue; |
41702fec | 2343 | nlayers++; |
41702fec | 2344 | } |
1ba638fc | 2345 | if(nlayers < 4) return ntracks; |
41702fec | 2346 | |
2347 | ||
2348 | // Start finding seeds | |
2349 | Double_t cond0[4], cond1[4], cond2[4]; | |
2350 | Int_t icl = 0; | |
d611c74f | 2351 | while((c[3] = (*fSeedTB[3])[icl++])){ |
41702fec | 2352 | if(!c[3]) continue; |
d611c74f | 2353 | fSeedTB[0]->BuildCond(c[3], cond0, 0); |
2354 | fSeedTB[0]->GetClusters(cond0, index, ncl); | |
41702fec | 2355 | //printf("Found c[3] candidates 0 %d\n", ncl); |
2356 | Int_t jcl = 0; | |
2357 | while(jcl<ncl) { | |
d611c74f | 2358 | c[0] = (*fSeedTB[0])[index[jcl++]]; |
41702fec | 2359 | if(!c[0]) continue; |
2360 | Double_t dx = c[3]->GetX() - c[0]->GetX(); | |
2361 | Double_t theta = (c[3]->GetZ() - c[0]->GetZ())/dx; | |
2362 | Double_t phi = (c[3]->GetY() - c[0]->GetY())/dx; | |
d611c74f | 2363 | fSeedTB[1]->BuildCond(c[0], cond1, 1, theta, phi); |
2364 | fSeedTB[1]->GetClusters(cond1, jndex, mcl); | |
41702fec | 2365 | //printf("Found c[0] candidates 1 %d\n", mcl); |
2366 | ||
2367 | Int_t kcl = 0; | |
2368 | while(kcl<mcl) { | |
d611c74f | 2369 | c[1] = (*fSeedTB[1])[jndex[kcl++]]; |
2370 | if(!c[1]) continue; | |
2371 | fSeedTB[2]->BuildCond(c[1], cond2, 2, theta, phi); | |
2372 | c[2] = fSeedTB[2]->GetNearestCluster(cond2); | |
2373 | //printf("Found c[1] candidate 2 %p\n", c[2]); | |
2374 | if(!c[2]) continue; | |
2375 | ||
2376 | // AliInfo("Seeding clusters found. Building seeds ..."); | |
2377 | // for(Int_t i = 0; i < kNSeedPlanes; i++) printf("%i. coordinates: x = %6.3f, y = %6.3f, z = %6.3f\n", i, c[i]->GetX(), c[i]->GetY(), c[i]->GetZ()); | |
2378 | ||
804bb02e | 2379 | for (Int_t il = 0; il < kNPlanes; il++) cseed[il].Reset(); |
41702fec | 2380 | |
d611c74f | 2381 | FitRieman(c, chi2); |
2382 | ||
d931f2aa | 2383 | AliTRDseedV1 *tseed = &cseed[0]; |
2384 | AliTRDtrackingChamber **cIter = &stack[0]; | |
2385 | for(int iLayer=0; iLayer<kNPlanes; iLayer++, tseed++, cIter++){ | |
2386 | tseed->SetDetector((*cIter) ? (*cIter)->GetDetector() : -1); | |
43d6ad34 | 2387 | tseed->SetTilt(hL[iLayer]); |
2388 | tseed->SetPadLength(padlength[iLayer]); | |
3a039a31 | 2389 | tseed->SetReconstructor(fReconstructor); |
d931f2aa | 2390 | tseed->SetX0((*cIter) ? (*cIter)->GetX() : x_def[iLayer]); |
d611c74f | 2391 | tseed->Init(GetRiemanFitter()); |
2392 | } | |
2393 | ||
2394 | Bool_t isFake = kFALSE; | |
3a039a31 | 2395 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
d611c74f | 2396 | if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2397 | if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; | |
2398 | if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; | |
2399 | ||
2400 | Double_t xpos[4]; | |
2401 | for(Int_t l = 0; l < kNSeedPlanes; l++) xpos[l] = fSeedTB[l]->GetX(); | |
2402 | Float_t yref[4]; | |
2403 | for(int il=0; il<4; il++) yref[il] = cseed[planes[il]].GetYref(0); | |
2404 | Int_t ll = c[3]->GetLabel(0); | |
2405 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); | |
2406 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
2407 | AliRieman *rim = GetRiemanFitter(); | |
29f95561 | 2408 | TTreeSRedirector &cs0 = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f | 2409 | cs0 << "MakeSeeds0" |
2410 | <<"EventNumber=" << eventNumber | |
2411 | <<"CandidateNumber=" << candidateNumber | |
2412 | <<"isFake=" << isFake | |
2413 | <<"config=" << config | |
2414 | <<"label=" << ll | |
2415 | <<"chi2z=" << chi2[0] | |
2416 | <<"chi2y=" << chi2[1] | |
2417 | <<"Y2exp=" << cond2[0] | |
2418 | <<"Z2exp=" << cond2[1] | |
2419 | <<"X0=" << xpos[0] //layer[sLayer]->GetX() | |
2420 | <<"X1=" << xpos[1] //layer[sLayer + 1]->GetX() | |
2421 | <<"X2=" << xpos[2] //layer[sLayer + 2]->GetX() | |
2422 | <<"X3=" << xpos[3] //layer[sLayer + 3]->GetX() | |
2423 | <<"yref0=" << yref[0] | |
2424 | <<"yref1=" << yref[1] | |
2425 | <<"yref2=" << yref[2] | |
2426 | <<"yref3=" << yref[3] | |
2427 | <<"c0.=" << c[0] | |
2428 | <<"c1.=" << c[1] | |
2429 | <<"c2.=" << c[2] | |
2430 | <<"c3.=" << c[3] | |
2431 | <<"Seed0.=" << &cseed[planes[0]] | |
2432 | <<"Seed1.=" << &cseed[planes[1]] | |
2433 | <<"Seed2.=" << &cseed[planes[2]] | |
2434 | <<"Seed3.=" << &cseed[planes[3]] | |
2435 | <<"RiemanFitter.=" << rim | |
2436 | <<"\n"; | |
2437 | } | |
3a039a31 | 2438 | if(chi2[0] > fReconstructor->GetRecoParam() ->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){ |
91834b8d | 2439 | // //AliInfo(Form("Failed chi2 filter on chi2Z [%f].", chi2[0])); |
d611c74f | 2440 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2441 | continue; | |
2442 | } | |
3a039a31 | 2443 | if(chi2[1] > fReconstructor->GetRecoParam() ->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){ |
91834b8d | 2444 | // //AliInfo(Form("Failed chi2 filter on chi2Y [%f].", chi2[1])); |
d611c74f | 2445 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2446 | continue; | |
2447 | } | |
2448 | //AliInfo("Passed chi2 filter."); | |
2449 | ||
2450 | // try attaching clusters to tracklets | |
2451 | Int_t nUsedCl = 0; | |
2452 | Int_t mlayers = 0; | |
be24510a | 2453 | for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){ |
d611c74f | 2454 | Int_t jLayer = planes[iLayer]; |
2455 | if(!cseed[jLayer].AttachClustersIter(stack[jLayer], 5., kFALSE, c[iLayer])) continue; | |
2456 | nUsedCl += cseed[jLayer].GetNUsed(); | |
2457 | if(nUsedCl > 25) break; | |
2458 | mlayers++; | |
2459 | } | |
be24510a | 2460 | |
2461 | if(mlayers < kNSeedPlanes){ | |
2462 | //AliInfo(Form("Failed updating all seeds %d [%d].", mlayers, kNSeedPlanes)); | |
2463 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); | |
2464 | continue; | |
2465 | } | |
2466 | ||
2467 | // temporary exit door for the HLT | |
4302c900 | 2468 | if(fReconstructor->IsHLT()){ |
be24510a | 2469 | // attach clusters to extrapolation chambers |
2470 | for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){ | |
2471 | Int_t jLayer = planesExt[iLayer]; | |
2472 | if(!(chamber = stack[jLayer])) continue; | |
2473 | cseed[jLayer].AttachClustersIter(chamber, 1000.); | |
2474 | } | |
4302c900 | 2475 | fTrackQuality[ntracks] = 1.; // dummy value |
2476 | ntracks++; | |
218ba867 | 2477 | if(ntracks == kMaxTracksStack) return ntracks; |
4302c900 | 2478 | cseed += 6; |
2479 | continue; | |
2480 | } | |
2481 | ||
be24510a | 2482 | |
d611c74f | 2483 | // fit tracklets and cook likelihood |
2484 | FitTiltedRieman(&cseed[0], kTRUE);// Update Seeds and calculate Likelihood | |
91834b8d | 2485 | Double_t like = CookLikelihood(&cseed[0], planes); // to be checked |
d611c74f | 2486 | |
3a039a31 | 2487 | if (TMath::Log(1.E-9 + like) < fReconstructor->GetRecoParam() ->GetTrackLikelihood()){ |
d611c74f | 2488 | //AliInfo(Form("Failed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); |
2489 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); | |
2490 | continue; | |
2491 | } | |
2492 | //AliInfo(Form("Passed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); | |
2493 | ||
2494 | // book preliminary results | |
2495 | seedQuality[ntracks] = like; | |
2496 | fSeedLayer[ntracks] = config;/*sLayer;*/ | |
2497 | ||
2498 | // attach clusters to the extrapolation seeds | |
d611c74f | 2499 | Int_t nusedf = 0; // debug value |
be24510a | 2500 | for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){ |
2501 | Int_t jLayer = planesExt[iLayer]; | |
d611c74f | 2502 | if(!(chamber = stack[jLayer])) continue; |
d611c74f | 2503 | |
2504 | // fit extrapolated seed | |
2505 | if ((jLayer == 0) && !(cseed[1].IsOK())) continue; | |
2506 | if ((jLayer == 5) && !(cseed[4].IsOK())) continue; | |
2507 | AliTRDseedV1 pseed = cseed[jLayer]; | |
2508 | if(!pseed.AttachClustersIter(chamber, 1000.)) continue; | |
2509 | cseed[jLayer] = pseed; | |
2510 | nusedf += cseed[jLayer].GetNUsed(); // debug value | |
2511 | FitTiltedRieman(cseed, kTRUE); | |
2512 | } | |
2513 | ||
2514 | // AliInfo("Extrapolation done."); | |
2515 | // Debug Stream containing all the 6 tracklets | |
3a039a31 | 2516 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
29f95561 | 2517 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f | 2518 | TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); |
2519 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); | |
2520 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
2521 | cstreamer << "MakeSeeds1" | |
2522 | << "EventNumber=" << eventNumber | |
2523 | << "CandidateNumber=" << candidateNumber | |
2524 | << "S0.=" << &cseed[0] | |
2525 | << "S1.=" << &cseed[1] | |
2526 | << "S2.=" << &cseed[2] | |
2527 | << "S3.=" << &cseed[3] | |
2528 | << "S4.=" << &cseed[4] | |
2529 | << "S5.=" << &cseed[5] | |
2530 | << "FitterT.=" << tiltedRieman | |
2531 | << "\n"; | |
2532 | } | |
2533 | ||
fb872574 | 2534 | if(fReconstructor->GetRecoParam()->HasImproveTracklets() && ImproveSeedQuality(stack, cseed) < 4){ |
d611c74f | 2535 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2536 | continue; | |
2537 | } | |
2538 | //AliInfo("Improve seed quality done."); | |
2539 | ||
2540 | // fit full track and cook likelihoods | |
2541 | // Double_t curv = FitRieman(&cseed[0], chi2); | |
2542 | // Double_t chi2ZF = chi2[0] / TMath::Max((mlayers - 3.), 1.); | |
2543 | // Double_t chi2RF = chi2[1] / TMath::Max((mlayers - 3.), 1.); | |
2544 | ||
2545 | // do the final track fitting (Once with vertex constraint and once without vertex constraint) | |
2546 | Double_t chi2Vals[3]; | |
2547 | chi2Vals[0] = FitTiltedRieman(&cseed[0], kFALSE); | |
91834b8d | 2548 | if(fReconstructor->GetRecoParam()->IsVertexConstrained()) |
d611c74f | 2549 | chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ()); // Do Vertex Constrained fit if desired |
2550 | else | |
2551 | chi2Vals[1] = 1.; | |
2552 | chi2Vals[2] = GetChi2Z(&cseed[0]) / TMath::Max((mlayers - 3.), 1.); | |
2553 | // Chi2 definitions in testing stage | |
2554 | //chi2Vals[2] = GetChi2ZTest(&cseed[0]); | |
2555 | fTrackQuality[ntracks] = CalculateTrackLikelihood(&cseed[0], &chi2Vals[0]); | |
2556 | //AliInfo("Hyperplane fit done\n"); | |
2557 | ||
2558 | // finalize tracklets | |
2559 | Int_t labels[12]; | |
2560 | Int_t outlab[24]; | |
2561 | Int_t nlab = 0; | |
2562 | for (Int_t iLayer = 0; iLayer < 6; iLayer++) { | |
2563 | if (!cseed[iLayer].IsOK()) continue; | |
2564 | ||
2565 | if (cseed[iLayer].GetLabels(0) >= 0) { | |
2566 | labels[nlab] = cseed[iLayer].GetLabels(0); | |
2567 | nlab++; | |
2568 | } | |
2569 | ||
2570 | if (cseed[iLayer].GetLabels(1) >= 0) { | |
2571 | labels[nlab] = cseed[iLayer].GetLabels(1); | |
2572 | nlab++; | |
2573 | } | |
2574 | } | |
2575 | Freq(nlab,labels,outlab,kFALSE); | |
2576 | Int_t label = outlab[0]; | |
2577 | Int_t frequency = outlab[1]; | |
e3cf3d02 | 2578 | // for (Int_t iLayer = 0; iLayer < 6; iLayer++) { |
2579 | // cseed[iLayer].SetFreq(frequency); | |
2580 | // cseed[iLayer].SetChi2Z(chi2[1]); | |
2581 | // } | |
d611c74f | 2582 | |
3a039a31 | 2583 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
29f95561 | 2584 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f | 2585 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2586 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
2587 | TLinearFitter *fitterTC = GetTiltedRiemanFitterConstraint(); | |
2588 | TLinearFitter *fitterT = GetTiltedRiemanFitter(); | |
91834b8d | 2589 | Int_t ncls = 0; |
2590 | for(Int_t iseed = 0; iseed < kNPlanes; iseed++){ | |
2591 | ncls += cseed[iseed].IsOK() ? cseed[iseed].GetN2() : 0; | |
2592 | } | |
d611c74f | 2593 | cstreamer << "MakeSeeds2" |
2594 | << "EventNumber=" << eventNumber | |
2595 | << "CandidateNumber=" << candidateNumber | |
2596 | << "Chi2TR=" << chi2Vals[0] | |
2597 | << "Chi2TC=" << chi2Vals[1] | |
2598 | << "Nlayers=" << mlayers | |
91834b8d | 2599 | << "NClusters=" << ncls |
d611c74f | 2600 | << "NUsedS=" << nUsedCl |
2601 | << "NUsed=" << nusedf | |
2602 | << "Like=" << like | |
2603 | << "S0.=" << &cseed[0] | |
2604 | << "S1.=" << &cseed[1] | |
2605 | << "S2.=" << &cseed[2] | |
2606 | << "S3.=" << &cseed[3] | |
2607 | << "S4.=" << &cseed[4] | |
2608 | << "S5.=" << &cseed[5] | |
2609 | << "Label=" << label | |
2610 | << "Freq=" << frequency | |
2611 | << "FitterT.=" << fitterT | |
2612 | << "FitterTC.=" << fitterTC | |
2613 | << "\n"; | |
2614 | } | |
2615 | ||
2616 | ntracks++; | |
2617 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); | |
2618 | if(ntracks == kMaxTracksStack){ | |
2619 | AliWarning(Form("Number of seeds reached maximum allowed (%d) in stack.", kMaxTracksStack)); | |
2620 | return ntracks; | |
2621 | } | |
2622 | cseed += 6; | |
41702fec | 2623 | } |
2624 | } | |
2625 | } | |
41702fec | 2626 | |
2627 | return ntracks; | |
e4f2f73d | 2628 | } |
2629 | ||
2630 | //_____________________________________________________________________________ | |
0906e73e | 2631 | AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 *seeds, Double_t *params) |
e4f2f73d | 2632 | { |
41702fec | 2633 | // |
2634 | // Build a TRD track out of tracklet candidates | |
2635 | // | |
2636 | // Parameters : | |
2637 | // seeds : array of tracklets | |
2638 | // params : track parameters (see MakeSeeds() function body for a detailed description) | |
2639 | // | |
2640 | // Output : | |
2641 | // The TRD track. | |
2642 | // | |
2643 | // Detailed description | |
2644 | // | |
2645 | // To be discussed with Marian !! | |
2646 | // | |
2647 | ||
41702fec | 2648 | |
2649 | Double_t alpha = AliTRDgeometry::GetAlpha(); | |
2650 | Double_t shift = AliTRDgeometry::GetAlpha()/2.0; | |
2651 | Double_t c[15]; | |
2652 | ||
2653 | c[ 0] = 0.2; | |
2654 | c[ 1] = 0.0; c[ 2] = 2.0; | |
2655 | c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02; | |
2656 | c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1; | |
2657 | c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01; | |
2658 | ||
d20df6fc | 2659 | AliTRDtrackV1 track(seeds, ¶ms[1], c, params[0], params[6]*alpha+shift); |
2660 | track.PropagateTo(params[0]-5.0); | |
91834b8d | 2661 | if(fReconstructor->IsHLT()){ |
2662 | AliTRDseedV1 *ptrTracklet = 0x0; | |
2663 | for(Int_t ip=0; ip<kNPlanes; ip++){ | |
2664 | track.UnsetTracklet(ip); | |
2665 | ptrTracklet = SetTracklet(&seeds[ip]); | |
2666 | track.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); | |
2667 | } | |
d78d7df0 | 2668 | AliTRDtrackV1 *ptrTrack = SetTrack(&track); |
2669 | ptrTrack->SetReconstructor(fReconstructor); | |
2670 | return ptrTrack; | |
91834b8d | 2671 | } |
393fda1c | 2672 | |
d20df6fc | 2673 | track.ResetCovariance(1); |
e79f8eb0 | 2674 | Int_t nc = TMath::Abs(FollowBackProlongation(track)); |
393fda1c | 2675 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 5){ |
2676 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); | |
2677 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
2678 | Double_t p[5]; // Track Params for the Debug Stream | |
2679 | track.GetExternalParameters(params[0], p); | |
29f95561 | 2680 | TTreeSRedirector &cs = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
393fda1c | 2681 | cs << "MakeTrack" |
2682 | << "EventNumber=" << eventNumber | |
2683 | << "CandidateNumber=" << candidateNumber | |
2684 | << "nc=" << nc | |
2685 | << "X=" << params[0] | |
2686 | << "Y=" << p[0] | |
2687 | << "Z=" << p[1] | |
2688 | << "snp=" << p[2] | |
2689 | << "tnd=" << p[3] | |
2690 | << "crv=" << p[4] | |
2691 | << "Yin=" << params[1] | |
2692 | << "Zin=" << params[2] | |
2693 | << "snpin=" << params[3] | |
2694 | << "tndin=" << params[4] | |
2695 | << "crvin=" << params[5] | |
2696 | << "track.=" << &track | |
2697 | << "\n"; | |
2698 | } | |
d20df6fc | 2699 | if (nc < 30) return 0x0; |
2700 | ||
2701 | AliTRDtrackV1 *ptrTrack = SetTrack(&track); | |
215f7116 | 2702 | ptrTrack->SetReconstructor(fReconstructor); |
48f8adf3 | 2703 | ptrTrack->CookLabel(.9); |
24253b0a | 2704 | |
d20df6fc | 2705 | // computes PID for track |
2706 | ptrTrack->CookPID(); | |
2707 | // update calibration references using this track | |
48f8adf3 | 2708 | AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); |
2709 | if (!calibra){ | |
2710 | AliInfo("Could not get Calibra instance\n"); | |
2711 | if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(ptrTrack); | |
2712 | } | |
d20df6fc | 2713 | return ptrTrack; |
e4f2f73d | 2714 | } |
2715 | ||
0906e73e | 2716 | |
e4f2f73d | 2717 | //____________________________________________________________________ |
eb38ed55 | 2718 | Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *cseed) |
e4f2f73d | 2719 | { |
41702fec | 2720 | // |
2721 | // Sort tracklets according to "quality" and try to "improve" the first 4 worst | |
2722 | // | |
2723 | // Parameters : | |
2724 | // layers : Array of propagation layers for a stack/supermodule | |
2725 | // cseed : Array of 6 seeding tracklets which has to be improved | |
2726 | // | |
2727 | // Output : | |
2728 | // cssed : Improved seeds | |
2729 | // | |
2730 | // Detailed description | |
2731 | // | |
2732 | // Iterative procedure in which new clusters are searched for each | |
2733 | // tracklet seed such that the seed quality (see AliTRDseed::GetQuality()) | |
2734 | // can be maximized. If some optimization is found the old seeds are replaced. | |
2735 | // | |
2736 | // debug level: 7 | |
2737 | // | |
2738 | ||
2739 | // make a local working copy | |
2740 | AliTRDtrackingChamber *chamber = 0x0; | |
2741 | AliTRDseedV1 bseed[6]; | |
2742 | Int_t nLayers = 0; | |
2743 | for (Int_t jLayer = 0; jLayer < 6; jLayer++) bseed[jLayer] = cseed[jLayer]; | |
2744 | ||
2745 | Float_t lastquality = 10000.0; | |
2746 | Float_t lastchi2 = 10000.0; | |
2747 | Float_t chi2 = 1000.0; | |
2748 | ||
2749 | for (Int_t iter = 0; iter < 4; iter++) { | |
2750 | Float_t sumquality = 0.0; | |
2751 | Float_t squality[6]; | |
2752 | Int_t sortindexes[6]; | |
2753 | ||
2754 | for (Int_t jLayer = 0; jLayer < 6; jLayer++) { | |
3a039a31 | 2755 | squality[jLayer] = bseed[jLayer].IsOK() ? bseed[jLayer].GetQuality(kTRUE) : 1000.; |
41702fec | 2756 | sumquality += squality[jLayer]; |
2757 | } | |
2758 | if ((sumquality >= lastquality) || (chi2 > lastchi2)) break; | |
2759 | ||
2760 | nLayers = 0; | |
2761 | lastquality = sumquality; | |
2762 | lastchi2 = chi2; | |
2763 | if (iter > 0) for (Int_t jLayer = 0; jLayer < 6; jLayer++) cseed[jLayer] = bseed[jLayer]; | |
2764 | ||
2765 | TMath::Sort(6, squality, sortindexes, kFALSE); | |
2766 | for (Int_t jLayer = 5; jLayer > 1; jLayer--) { | |
2767 | Int_t bLayer = sortindexes[jLayer]; | |
2768 | if(!(chamber = stack[bLayer])) continue; | |
2769 | bseed[bLayer].AttachClustersIter(chamber, squality[bLayer], kTRUE); | |
2770 | if(bseed[bLayer].IsOK()) nLayers++; | |
2771 | } | |
2772 | ||
2773 | chi2 = FitTiltedRieman(bseed, kTRUE); | |
3a039a31 | 2774 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 7){ |
41702fec | 2775 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2776 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
2777 | TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); | |
29f95561 | 2778 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 2779 | cstreamer << "ImproveSeedQuality" |
2780 | << "EventNumber=" << eventNumber | |
2781 | << "CandidateNumber=" << candidateNumber | |
2782 | << "Iteration=" << iter | |
2783 | << "S0.=" << &bseed[0] | |
2784 | << "S1.=" << &bseed[1] | |
2785 | << "S2.=" << &bseed[2] | |
2786 | << "S3.=" << &bseed[3] | |
2787 | << "S4.=" << &bseed[4] | |
2788 | << "S5.=" << &bseed[5] | |
2789 | << "FitterT.=" << tiltedRieman | |
2790 | << "\n"; | |
2791 | } | |
2792 | } // Loop: iter | |
2793 | ||
2794 | // we are sure that at least 2 tracklets are OK ! | |
2795 | return nLayers+2; | |
e4f2f73d | 2796 | } |
2797 | ||
eb38ed55 | 2798 | //_________________________________________________________________________ |
2799 | Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2){ | |
41702fec | 2800 | // |
2801 | // Calculates the Track Likelihood value. This parameter serves as main quality criterion for | |
2802 | // the track selection | |
2803 | // The likelihood value containes: | |
2804 | // - The chi2 values from the both fitters and the chi2 values in z-direction from a linear fit | |
2805 | // - The Sum of the Parameter |slope_ref - slope_fit|/Sigma of the tracklets | |
2806 | // For all Parameters an exponential dependency is used | |
2807 | // | |
2808 | // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate | |
2809 | // - Array of chi2 values: | |
2810 | // * Non-Constrained Tilted Riemann fit | |
2811 | // * Vertex-Constrained Tilted Riemann fit | |
2812 | // * z-Direction from Linear fit | |
2813 | // Output: - The calculated track likelihood | |
2814 | // | |
2815 | // debug level 2 | |
2816 | // | |
2817 | ||
2818 | Double_t sumdaf = 0, nLayers = 0; | |
2819 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { | |
2820 | if(!tracklets[iLayer].IsOK()) continue; | |
e3cf3d02 | 2821 | sumdaf += TMath::Abs((tracklets[iLayer].GetYfit(1) - tracklets[iLayer].GetYref(1))/ tracklets[iLayer].GetS2Y()); |
41702fec | 2822 | nLayers++; |
2823 | } | |
2824 | sumdaf /= Float_t (nLayers - 2.0); | |
2825 | ||
2826 | Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); // Chi2Z | |
3a039a31 | 2827 | Double_t likeChi2TC = (fReconstructor->GetRecoParam() ->IsVertexConstrained()) ? |
d20df6fc | 2828 | TMath::Exp(-chi2[1] * 0.677) : 1; // Constrained Tilted Riemann |
41702fec | 2829 | Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.78); // Non-constrained Tilted Riemann |
2830 | Double_t likeAF = TMath::Exp(-sumdaf * 3.23); | |
2831 | Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeAF; | |
2832 | ||
3a039a31 | 2833 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
41702fec | 2834 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2835 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
29f95561 | 2836 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 2837 | cstreamer << "CalculateTrackLikelihood0" |
2838 | << "EventNumber=" << eventNumber | |
2839 | << "CandidateNumber=" << candidateNumber | |
2840 | << "LikeChi2Z=" << likeChi2Z | |
2841 | << "LikeChi2TR=" << likeChi2TR | |
2842 | << "LikeChi2TC=" << likeChi2TC | |
2843 | << "LikeAF=" << likeAF | |
2844 | << "TrackLikelihood=" << trackLikelihood | |
2845 | << "\n"; | |
2846 | } | |
2847 | ||
2848 | return trackLikelihood; | |
e4f2f73d | 2849 | } |
2850 | ||
2851 | //____________________________________________________________________ | |
91834b8d | 2852 | Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) |
e4f2f73d | 2853 | { |
41702fec | 2854 | // |
2855 | // Calculate the probability of this track candidate. | |
2856 | // | |
2857 | // Parameters : | |
2858 | // cseeds : array of candidate tracklets | |
2859 | // planes : array of seeding planes (see seeding configuration) | |
2860 | // chi2 : chi2 values (on the Z and Y direction) from the rieman fit of the track. | |
2861 | // | |
2862 | // Output : | |
2863 | // likelihood value | |
2864 | // | |
2865 | // Detailed description | |
2866 | // | |
2867 | // The track quality is estimated based on the following 4 criteria: | |
2868 | // 1. precision of the rieman fit on the Y direction (likea) | |
2869 | // 2. chi2 on the Y direction (likechi2y) | |
2870 | // 3. chi2 on the Z direction (likechi2z) | |
2871 | // 4. number of attached clusters compared to a reference value | |
2872 | // (see AliTRDrecoParam::fkFindable) (likeN) | |
2873 | // | |
2874 | // The distributions for each type of probabilities are given below as of | |
2875 | // (date). They have to be checked to assure consistency of estimation. | |
2876 | // | |
2877 | ||
2878 | // ratio of the total number of clusters/track which are expected to be found by the tracker. | |
91834b8d | 2879 | const AliTRDrecoParam *fRecoPars = fReconstructor->GetRecoParam(); |
41702fec | 2880 | |
91834b8d | 2881 | Double_t chi2y = GetChi2Y(&cseed[0]); |
2882 | Double_t chi2z = GetChi2Z(&cseed[0]); | |
2883 | ||
8ae98148 | 2884 | Float_t nclusters = 0.; |
41702fec | 2885 | Double_t sumda = 0.; |
2886 | for(UChar_t ilayer = 0; ilayer < 4; ilayer++){ | |
2887 | Int_t jlayer = planes[ilayer]; | |
2888 | nclusters += cseed[jlayer].GetN2(); | |
e3cf3d02 | 2889 | sumda += TMath::Abs(cseed[jlayer].GetYfit(1) - cseed[jlayer].GetYref(1)); |
41702fec | 2890 | } |
8ae98148 | 2891 | nclusters *= .25; |
2892 | ||
5a2e200c | 2893 | Double_t likea = TMath::Exp(-sumda * fRecoPars->GetPhiSlope()); |
41702fec | 2894 | Double_t likechi2y = 0.0000000001; |
5a2e200c | 2895 | if (fReconstructor->IsCosmic() || chi2y < fRecoPars->GetChi2YCut()) likechi2y += TMath::Exp(-TMath::Sqrt(chi2y) * fRecoPars->GetChi2YSlope()); |
2896 | Double_t likechi2z = TMath::Exp(-chi2z * fRecoPars->GetChi2ZSlope()); | |
8ae98148 | 2897 | Double_t likeN = TMath::Exp(-(fRecoPars->GetNMeanClusters() - nclusters) / fRecoPars->GetNSigmaClusters()); |
41702fec | 2898 | Double_t like = likea * likechi2y * likechi2z * likeN; |
2899 | ||
2900 | // AliInfo(Form("sumda(%f) chi2[0](%f) chi2[1](%f) likea(%f) likechi2y(%f) likechi2z(%f) nclusters(%d) likeN(%f)", sumda, chi2[0], chi2[1], likea, likechi2y, likechi2z, nclusters, likeN)); | |
3a039a31 | 2901 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
41702fec | 2902 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2903 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); | |
91834b8d | 2904 | Int_t nTracklets = 0; Float_t mean_ncls = 0; |
2905 | for(Int_t iseed=0; iseed < kNPlanes; iseed++){ | |
2906 | if(!cseed[iseed].IsOK()) continue; | |
2907 | nTracklets++; | |
2908 | mean_ncls += cseed[iseed].GetN2(); | |
2909 | } | |
2910 | if(nTracklets) mean_ncls /= nTracklets; | |
41702fec | 2911 | // The Debug Stream contains the seed |
29f95561 | 2912 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec | 2913 | cstreamer << "CookLikelihood" |
2914 | << "EventNumber=" << eventNumber | |
2915 | << "CandidateNumber=" << candidateNumber | |
2916 | << "tracklet0.=" << &cseed[0] | |
2917 | << "tracklet1.=" << &cseed[1] | |
2918 | << "tracklet2.=" << &cseed[2] | |
2919 | << "tracklet3.=" << &cseed[3] | |
2920 | << "tracklet4.=" << &cseed[4] | |
2921 | << "tracklet5.=" << &cseed[5] | |
2922 | << "sumda=" << sumda | |
91834b8d | 2923 | << "chi2y=" << chi2y |
2924 | << "chi2z=" << chi2z | |
41702fec | 2925 | << "likea=" << likea |
2926 | << "likechi2y=" << likechi2y | |
2927 | << "likechi2z=" << likechi2z | |
2928 | << "nclusters=" << nclusters | |
2929 | << "likeN=" << likeN | |
2930 | << "like=" << like | |
91834b8d | 2931 | << "meanncls=" << mean_ncls |
41702fec | 2932 | << "\n"; |
2933 | } | |
2934 | ||
2935 | return like; | |
e4f2f73d | 2936 | } |
2937 | ||
e4f2f73d | 2938 | //____________________________________________________________________ |
0906e73e | 2939 | void AliTRDtrackerV1::GetSeedingConfig(Int_t iconfig, Int_t planes[4]) |
e4f2f73d | 2940 | { |
41702fec | 2941 | // |
2942 | // Map seeding configurations to detector planes. | |
2943 | // | |
2944 | // Parameters : | |
2945 | // iconfig : configuration index | |
2946 | // planes : member planes of this configuration. On input empty. | |
2947 | // | |
2948 | // Output : | |
2949 | // planes : contains the planes which are defining the configuration | |
2950 | // | |
2951 | // Detailed description | |
2952 | // | |
2953 | // Here is the list of seeding planes configurations together with | |
2954 | // their topological classification: | |
2955 | // | |
2956 | // 0 - 5432 TQ 0 | |
2957 | // 1 - 4321 TQ 0 | |
2958 | // 2 - 3210 TQ 0 | |
2959 | // 3 - 5321 TQ 1 | |
2960 | // 4 - 4210 TQ 1 | |
2961 | // 5 - 5431 TQ 1 | |
2962 | // 6 - 4320 TQ 1 | |
2963 | // 7 - 5430 TQ 2 | |
2964 | // 8 - 5210 TQ 2 | |
2965 | // 9 - 5421 TQ 3 | |
2966 | // 10 - 4310 TQ 3 | |
2967 | // 11 - 5410 TQ 4 | |
2968 | // 12 - 5420 TQ 5 | |
2969 | // 13 - 5320 TQ 5 | |
2970 | // 14 - 5310 TQ 5 | |
2971 | // | |
2972 | // The topologic quality is modeled as follows: | |
2973 | // 1. The general model is define by the equation: | |
2974 | // p(conf) = exp(-conf/2) | |
2975 | // 2. According to the topologic classification, configurations from the same | |
2976 | // class are assigned the agerage value over the model values. | |
2977 | // 3. Quality values are normalized. | |
2978 | // | |
2979 | // The topologic quality distribution as function of configuration is given below: | |
2980 | //Begin_Html | |
2981 | // <img src="gif/topologicQA.gif"> | |
2982 | //End_Html | |
2983 | // | |
2984 | ||
2985 | switch(iconfig){ | |
2986 | case 0: // 5432 TQ 0 | |
2987 | planes[0] = 2; | |
2988 | planes[1] = 3; | |
2989 | planes[2] = 4; | |
2990 | planes[3] = 5; | |
2991 | break; | |
2992 | case 1: // 4321 TQ 0 | |
2993 | planes[0] = 1; | |
2994 | planes[1] = 2; | |
2995 | planes[2] = 3; | |
2996 | planes[3] = 4; | |
2997 | break; | |
2998 | case 2: // 3210 TQ 0 | |
2999 | planes[0] = 0; | |
3000 | planes[1] = 1; | |
3001 | planes[2] = 2; | |
3002 | planes[3] = 3; | |
3003 | break; | |
3004 | case 3: // 5321 TQ 1 | |
3005 | planes[0] = 1; | |
3006 | planes[1] = 2; | |
3007 | planes[2] = 3; | |
3008 | planes[3] = 5; | |
3009 | break; | |
3010 | case 4: // 4210 TQ 1 | |
3011 | planes[0] = 0; | |
3012 | planes[1] = 1; | |
3013 | planes[2] = 2; | |
3014 | planes[3] = 4; | |
3015 | break; | |
3016 | case 5: // 5431 TQ 1 | |
3017 | planes[0] = 1; | |
3018 | planes[1] = 3; | |
3019 | planes[2] = 4; | |
3020 | planes[3] = 5; | |
3021 | break; | |
3022 | case 6: // 4320 TQ 1 | |
3023 | planes[0] = 0; | |
3024 | planes[1] = 2; | |
3025 | planes[2] = 3; | |
3026 | planes[3] = 4; | |
3027 | break; | |
3028 | case 7: // 5430 TQ 2 | |
3029 | planes[0] = 0; | |
3030 | planes[1] = 3; | |
3031 | planes[2] = 4; | |
3032 | planes[3] = 5; | |
3033 | break; | |
3034 | case 8: // 5210 TQ 2 | |
3035 | planes[0] = 0; | |
3036 | planes[1] = 1; | |
3037 | planes[2] = 2; | |
3038 | planes[3] = 5; | |
3039 | break; | |
3040 | case 9: // 5421 TQ 3 | |
3041 | planes[0] = 1; | |
3042 | planes[1] = 2; | |
3043 | planes[2] = 4; | |
3044 | planes[3] = 5; | |
3045 | break; | |
3046 | case 10: // 4310 TQ 3 | |
3047 | planes[0] = 0; | |
3048 | planes[1] = 1; | |
3049 | planes[2] = 3; | |
3050 | planes[3] = 4; | |
3051 | break; | |
3052 | case 11: // 5410 TQ 4 | |
3053 | planes[0] = 0; | |
3054 | planes[1] = 1; | |
3055 | planes[2] = 4; | |
3056 | planes[3] = 5; | |
3057 | break; | |
3058 | case 12: // 5420 TQ 5 | |
3059 | planes[0] = 0; | |
3060 | planes[1] = 2; | |
3061 | planes[2] = 4; | |
3062 | planes[3] = 5; | |
3063 | break; | |
3064 | case 13: // 5320 TQ 5 | |
3065 | planes[0] = 0; | |
3066 | planes[1] = 2; | |
3067 | planes[2] = 3; | |
3068 | planes[3] = 5; | |
3069 | break; | |
3070 | case 14: // 5310 TQ 5 | |
3071 | planes[0] = 0; | |
3072 | planes[1] = 1; | |
3073 | planes[2] = 3; | |
3074 | planes[3] = 5; | |
3075 | break; | |
3076 | } | |
e4f2f73d | 3077 | } |
3078 | ||
3079 | //____________________________________________________________________ | |
0906e73e | 3080 | void AliTRDtrackerV1::GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]) |
e4f2f73d | 3081 | { |
41702fec | 3082 | // |
3083 | // Returns the extrapolation planes for a seeding configuration. | |
3084 | // | |
3085 | // Parameters : | |
3086 | // iconfig : configuration index | |
3087 | // planes : planes which are not in this configuration. On input empty. | |
3088 | // | |
3089 | // Output : | |
3090 | // planes : contains the planes which are not in the configuration | |
3091 | // | |
3092 | // Detailed description | |
3093 | // | |
3094 | ||
3095 | switch(iconfig){ | |
3096 | case 0: // 5432 TQ 0 | |
3097 | planes[0] = 1; | |
3098 | planes[1] = 0; | |
3099 | break; | |
3100 | case 1: // 4321 TQ 0 | |
3101 | planes[0] = 5; | |
3102 | planes[1] = 0; | |
3103 | break; | |
3104 | case 2: // 3210 TQ 0 | |
3105 | planes[0] = 4; | |
3106 | planes[1] = 5; | |
3107 | break; | |
3108 | case 3: // 5321 TQ 1 | |
3109 | planes[0] = 4; | |
3110 | planes[1] = 0; | |
3111 | break; | |
3112 | case 4: // 4210 TQ 1 | |
3113 | planes[0] = 5; | |
3114 | planes[1] = 3; | |
3115 | break; | |
3116 | case 5: // 5431 TQ 1 | |
3117 | planes[0] = 2; | |
3118 | planes[1] = 0; | |
3119 | break; | |
3120 | case 6: // 4320 TQ 1 | |
3121 | planes[0] = 5; | |
3122 | planes[1] = 1; | |
3123 | break; | |
3124 | case 7: // 5430 TQ 2 | |
3125 | planes[0] = 2; | |
3126 | planes[1] = 1; | |
3127 | break; | |
3128 | case 8: // 5210 TQ 2 | |
3129 | planes[0] = 4; | |
3130 | planes[1] = 3; | |
3131 | break; | |
3132 | case 9: // 5421 TQ 3 | |
3133 | planes[0] = 3; | |
3134 | planes[1] = 0; | |
3135 | break; | |
3136 | case 10: // 4310 TQ 3 | |
3137 | planes[0] = 5; | |
3138 | planes[1] = 2; | |
3139 | break; | |
3140 | case 11: // 5410 TQ 4 | |
3141 | planes[0] = 3; | |
3142 | planes[1] = 2; | |
3143 | break; | |
3144 | case 12: // 5420 TQ 5 | |
3145 | planes[0] = 3; | |
3146 | planes[1] = 1; | |
3147 | break; | |
3148 | case 13: // 5320 TQ 5 | |
3149 | planes[0] = 4; | |
3150 | planes[1] = 1; | |
3151 | break; | |
3152 | case 14: // 5310 TQ 5 | |
3153 | planes[0] = 4; | |
3154 | planes[1] = 2; | |
3155 | break; | |
3156 | } | |
e4f2f73d | 3157 | } |
eb38ed55 | 3158 | |
3159 | //____________________________________________________________________ | |
3160 | AliCluster* AliTRDtrackerV1::GetCluster(Int_t idx) const | |
3161 | { | |
41702fec | 3162 | Int_t ncls = fClusters->GetEntriesFast(); |
2f7514a6 | 3163 | return idx >= 0 && idx < ncls ? (AliCluster*)fClusters->UncheckedAt(idx) : 0x0; |
eb38ed55 | 3164 | } |
3165 | ||
3b57a3f7 | 3166 | //____________________________________________________________________ |
3167 | AliTRDseedV1* AliTRDtrackerV1::GetTracklet(Int_t idx) const | |
3168 | { | |
41702fec | 3169 | Int_t ntrklt = fTracklets->GetEntriesFast(); |
2f7514a6 | 3170 | return idx >= 0 && idx < ntrklt ? (AliTRDseedV1*)fTracklets->UncheckedAt(idx) : 0x0; |
3b57a3f7 | 3171 | } |
3172 | ||
3173 | //____________________________________________________________________ | |
3174 | AliKalmanTrack* AliTRDtrackerV1::GetTrack(Int_t idx) const | |
3175 | { | |
41702fec | 3176 | Int_t ntrk = fTracks->GetEntriesFast(); |
2f7514a6 | 3177 | return idx >= 0 && idx < ntrk ? (AliKalmanTrack*)fTracks->UncheckedAt(idx) : 0x0; |
3b57a3f7 | 3178 | } |
3179 | ||
bb56afff | 3180 | //____________________________________________________________________ |
3181 | Float_t AliTRDtrackerV1::CalculateReferenceX(AliTRDseedV1 *tracklets){ | |
41702fec | 3182 | // |
3183 | // Calculates the reference x-position for the tilted Rieman fit defined as middle | |
3184 | // of the stack (middle between layers 2 and 3). For the calculation all the tracklets | |
3185 | // are taken into account | |
3186 | // | |
3187 | // Parameters: - Array of tracklets(AliTRDseedV1) | |
3188 | // | |
3189 | // Output: - The reference x-position(Float_t) | |
3190 | // | |
3191 | Int_t nDistances = 0; | |
3192 | Float_t meanDistance = 0.; | |
3193 | Int_t startIndex = 5; | |
3194 | for(Int_t il =5; il > 0; il--){ | |
3195 | if(tracklets[il].IsOK() && tracklets[il -1].IsOK()){ | |
3196 | Float_t xdiff = tracklets[il].GetX0() - tracklets[il -1].GetX0(); | |
3197 | meanDistance += xdiff; | |
3198 | nDistances++; | |
3199 | } | |
3200 | if(tracklets[il].IsOK()) startIndex = il; | |
3201 | } | |
3202 | if(tracklets[0].IsOK()) startIndex = 0; | |
3203 | if(!nDistances){ | |
3204 | // We should normally never get here | |
3205 | Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2); | |
3206 | Int_t iok = 0, idiff = 0; | |
3207 | // This attempt is worse and should be avoided: | |
3208 | // check for two chambers which are OK and repeat this without taking the mean value | |
3209 | // Strategy avoids a division by 0; | |
3210 | for(Int_t il = 5; il >= 0; il--){ | |
3211 | if(tracklets[il].IsOK()){ | |
3212 | xpos[iok] = tracklets[il].GetX0(); | |
3213 | iok++; | |
3214 | startIndex = il; | |
3215 | } | |
3216 | if(iok) idiff++; // to get the right difference; | |
3217 | if(iok > 1) break; | |
3218 | } | |
3219 | if(iok > 1){ | |
3220 | meanDistance = (xpos[0] - xpos[1])/idiff; | |
3221 | } | |
3222 | else{ | |
3223 | // we have do not even have 2 layers which are OK? The we do not need to fit at all | |
3224 | return 331.; | |
3225 | } | |
3226 | } | |
3227 | else{ | |
3228 | meanDistance /= nDistances; | |
3229 | } | |
3230 | return tracklets[startIndex].GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); | |
bb56afff | 3231 | } |
eb38ed55 | 3232 | |
3233 | //_____________________________________________________________________________ | |
3234 | Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist | |
41702fec | 3235 | , Int_t *outlist, Bool_t down) |
eb38ed55 | 3236 | { |
41702fec | 3237 | // |
3238 | // Sort eleements according occurancy | |
3239 | // The size of output array has is 2*n | |
3240 | // | |
3241 | ||
3242 | if (n <= 0) { | |
3243 | return 0; | |
3244 | } | |
3245 | ||
3246 | Int_t *sindexS = new Int_t[n]; // Temporary array for sorting | |
3247 | Int_t *sindexF = new Int_t[2*n]; | |
3248 | for (Int_t i = 0; i < n; i++) { | |
3249 | sindexF[i] = 0; | |
3250 | } | |
3251 | ||
3252 | TMath::Sort(n,inlist,sindexS,down); | |
3253 | ||
3254 | Int_t last = inlist[sindexS[0]]; | |
3255 | Int_t val = last; | |
3256 | sindexF[0] = 1; | |
3257 | sindexF[0+n] = last; | |
3258 | Int_t countPos = 0; | |
3259 | ||
3260 | // Find frequency | |
3261 | for (Int_t i = 1; i < n; i++) { | |
3262 | val = inlist[sindexS[i]]; | |
3263 | if (last == val) { | |
3264 | sindexF[countPos]++; | |
3265 | } | |
3266 | else { | |
3267 | countPos++; | |
3268 | sindexF[countPos+n] = val; | |
3269 | sindexF[countPos]++; | |
3270 | last = val; | |
3271 | } | |
3272 | } | |
3273 | if (last == val) { | |
3274 | countPos++; | |
3275 | } | |
3276 | ||
3277 | // Sort according frequency | |
3278 | TMath::Sort(countPos,sindexF,sindexS,kTRUE); | |
3279 | ||
3280 | for (Int_t i = 0; i < countPos; i++) { | |
3281 | outlist[2*i ] = sindexF[sindexS[i]+n]; | |
3282 | outlist[2*i+1] = sindexF[sindexS[i]]; | |
3283 | } | |
3284 | ||
3285 | delete [] sindexS; | |
3286 | delete [] sindexF; | |
3287 | ||
3288 | return countPos; | |
eb38ed55 | 3289 | |
3290 | } | |
bb56afff | 3291 | |
06b32d95 | 3292 | |
d611c74f | 3293 | //____________________________________________________________________ |
3294 | void AliTRDtrackerV1::ResetSeedTB() | |
3295 | { | |
3296 | // reset buffer for seeding time bin layers. If the time bin | |
3297 | // layers are not allocated this function allocates them | |
3298 | ||
3299 | for(Int_t isl=0; isl<kNSeedPlanes; isl++){ | |
3300 | if(!fSeedTB[isl]) fSeedTB[isl] = new AliTRDchamberTimeBin(); | |
3301 | else fSeedTB[isl]->Clear(); | |
3302 | } | |
3303 | } | |
3304 | ||
e3cf3d02 | 3305 | |
3306 | //_____________________________________________________________________________ | |
3307 | Float_t AliTRDtrackerV1::GetChi2Y(AliTRDseedV1 *tracklets) const | |
3308 | { | |
3309 | // Calculates normalized chi2 in y-direction | |
3310 | // chi2 = Sum chi2 / n_tracklets | |
3311 | ||
3312 | Double_t chi2 = 0.; Int_t n = 0; | |
3313 | for(Int_t ipl = kNPlanes; ipl--;){ | |
3314 | if(!tracklets[ipl].IsOK()) continue; | |
3315 | chi2 += tracklets[ipl].GetChi2Y(); | |
3316 | n++; | |
3317 | } | |
3318 | return n ? chi2/n : 0.; | |
3319 | } | |
3320 | ||
bb56afff | 3321 | //_____________________________________________________________________________ |
3322 | Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const | |
3323 | { | |
91834b8d | 3324 | // Calculates normalized chi2 in z-direction |
e3cf3d02 | 3325 | // chi2 = Sum chi2 / n_tracklets |
41702fec | 3326 | |
e3cf3d02 | 3327 | Double_t chi2 = 0; Int_t n = 0; |
3328 | for(Int_t ipl = kNPlanes; ipl--;){ | |
41702fec | 3329 | if(!tracklets[ipl].IsOK()) continue; |
e3cf3d02 | 3330 | chi2 += tracklets[ipl].GetChi2Z(); |
3331 | n++; | |
41702fec | 3332 | } |
e3cf3d02 | 3333 | return n ? chi2/n : 0.; |
bb56afff | 3334 | } |
8acca6a3 | 3335 | |
3336 | /////////////////////////////////////////////////////// | |
3337 | // // | |
3338 | // Resources of class AliTRDLeastSquare // | |
3339 | // // | |
3340 | /////////////////////////////////////////////////////// | |
3341 | ||
3342 | //_____________________________________________________________________________ | |
3343 | AliTRDtrackerV1::AliTRDLeastSquare::AliTRDLeastSquare(){ | |
41702fec | 3344 | // |
3345 | // Constructor of the nested class AliTRDtrackFitterLeastSquare | |
3346 | // | |
3347 | memset(fParams, 0, sizeof(Double_t) * 2); | |
3348 | memset(fSums, 0, sizeof(Double_t) * 5); | |
3349 | memset(fCovarianceMatrix, 0, sizeof(Double_t) * 3); | |
8acca6a3 | 3350 | |
3351 | } | |
3352 | ||
3353 | //_____________________________________________________________________________ | |
3354 | void AliTRDtrackerV1::AliTRDLeastSquare::AddPoint(Double_t *x, Double_t y, Double_t sigmaY){ | |
41702fec | 3355 | // |
3356 | // Adding Point to the fitter | |
3357 | // | |
3358 | Double_t weight = 1/(sigmaY * sigmaY); | |
3359 | Double_t &xpt = *x; | |
3360 | // printf("Adding point x = %f, y = %f, sigma = %f\n", xpt, y, sigmaY); | |
3361 | fSums[0] += weight; | |
3362 | fSums[1] += weight * xpt; | |
3363 | fSums[2] += weight * y; | |
3364 | fSums[3] += weight * xpt * y; | |
3365 | fSums[4] += weight * xpt * xpt; | |
3366 | fSums[5] += weight * y * y; | |
8acca6a3 | 3367 | } |
3368 | ||
3369 | //_____________________________________________________________________________ | |
3370 | void AliTRDtrackerV1::AliTRDLeastSquare::RemovePoint(Double_t *x, Double_t y, Double_t sigmaY){ | |
41702fec | 3371 | // |
3372 | // Remove Point from the sample | |
3373 | // | |
3374 | Double_t weight = 1/(sigmaY * sigmaY); | |
3375 | Double_t &xpt = *x; | |
3376 | fSums[0] -= weight; | |
3377 | fSums[1] -= weight * xpt; | |
3378 | fSums[2] -= weight * y; | |
3379 | fSums[3] -= weight * xpt * y; | |
3380 | fSums[4] -= weight * xpt * xpt; | |
3381 | fSums[5] -= weight * y * y; | |
8acca6a3 | 3382 | } |
3383 | ||
3384 | //_____________________________________________________________________________ | |
3385 | void AliTRDtrackerV1::AliTRDLeastSquare::Eval(){ | |
41702fec | 3386 | // |
3387 | // Evaluation of the fit: | |
3388 | // Calculation of the parameters | |
3389 | // Calculation of the covariance matrix | |
3390 | // | |
3391 | ||
3392 | Double_t denominator = fSums[0] * fSums[4] - fSums[1] *fSums[1]; | |
aec26713 | 3393 | if(denominator==0) return; |
3394 | ||
41702fec | 3395 | // for(Int_t isum = 0; isum < 5; isum++) |
3396 | // printf("fSums[%d] = %f\n", isum, fSums[isum]); | |
3397 | // printf("denominator = %f\n", denominator); | |
3398 | fParams[0] = (fSums[2] * fSums[4] - fSums[1] * fSums[3])/ denominator; | |
3399 | fParams[1] = (fSums[0] * fSums[3] - fSums[1] * fSums[2]) / denominator; | |
3400 | // printf("fParams[0] = %f, fParams[1] = %f\n", fParams[0], fParams[1]); | |
3401 | ||
3402 | // Covariance matrix | |
3403 | fCovarianceMatrix[0] = fSums[4] - fSums[1] * fSums[1] / fSums[0]; | |
3404 | fCovarianceMatrix[1] = fSums[5] - fSums[2] * fSums[2] / fSums[0]; | |
3405 | fCovarianceMatrix[2] = fSums[3] - fSums[1] * fSums[2] / fSums[0]; | |
8acca6a3 | 3406 | } |
3407 | ||
46b6abd7 | 3408 | //_____________________________________________________________________________ |
3409 | Double_t AliTRDtrackerV1::AliTRDLeastSquare::GetFunctionValue(Double_t *xpos) const { | |
41702fec | 3410 | // |
3411 | // Returns the Function value of the fitted function at a given x-position | |
3412 | // | |
3413 | return fParams[0] + fParams[1] * (*xpos); | |
46b6abd7 | 3414 | } |
3415 | ||
3416 | //_____________________________________________________________________________ | |
3417 | void AliTRDtrackerV1::AliTRDLeastSquare::GetCovarianceMatrix(Double_t *storage) const { | |
41702fec | 3418 | // |
3419 | // Copies the values of the covariance matrix into the storage | |
3420 | // | |
3421 | memcpy(storage, fCovarianceMatrix, sizeof(Double_t) * 3); | |
46b6abd7 | 3422 | } |
3423 |