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> |
eb2b4f91 |
38 | #include <TGeoMatrix.h> |
39 | #include <TGeoManager.h> |
e4f2f73d |
40 | |
41 | #include "AliLog.h" |
fac58f00 |
42 | #include "AliMathBase.h" |
e4f2f73d |
43 | #include "AliESDEvent.h" |
bb56afff |
44 | #include "AliGeomManager.h" |
e4f2f73d |
45 | #include "AliRieman.h" |
46 | #include "AliTrackPointArray.h" |
47 | |
e4f2f73d |
48 | #include "AliTRDgeometry.h" |
49 | #include "AliTRDpadPlane.h" |
e4f2f73d |
50 | #include "AliTRDcalibDB.h" |
e4f2f73d |
51 | #include "AliTRDReconstructor.h" |
52 | #include "AliTRDCalibraFillHisto.h" |
e4f2f73d |
53 | #include "AliTRDrecoParam.h" |
bb56afff |
54 | |
55 | #include "AliTRDcluster.h" |
e4f2f73d |
56 | #include "AliTRDseedV1.h" |
0906e73e |
57 | #include "AliTRDtrackV1.h" |
bb56afff |
58 | #include "AliTRDtrackerV1.h" |
59 | #include "AliTRDtrackerDebug.h" |
60 | #include "AliTRDtrackingChamber.h" |
61 | #include "AliTRDchamberTimeBin.h" |
62 | |
e4f2f73d |
63 | |
e4f2f73d |
64 | |
65 | ClassImp(AliTRDtrackerV1) |
eb38ed55 |
66 | |
67 | |
68 | const Float_t AliTRDtrackerV1::fgkMinClustersInTrack = 0.5; // |
69 | const Float_t AliTRDtrackerV1::fgkLabelFraction = 0.8; // |
70 | const Double_t AliTRDtrackerV1::fgkMaxChi2 = 12.0; // |
71 | const Double_t AliTRDtrackerV1::fgkMaxSnp = 0.95; // Maximum local sine of the azimuthal angle |
72 | const Double_t AliTRDtrackerV1::fgkMaxStep = 2.0; // Maximal step size in propagation |
d76231c8 |
73 | Double_t AliTRDtrackerV1::fgTopologicQA[kNConfigs] = { |
41702fec |
74 | 0.1112, 0.1112, 0.1112, 0.0786, 0.0786, |
75 | 0.0786, 0.0786, 0.0579, 0.0579, 0.0474, |
76 | 0.0474, 0.0408, 0.0335, 0.0335, 0.0335 |
e4f2f73d |
77 | }; |
2985ffcb |
78 | Int_t AliTRDtrackerV1::fgNTimeBins = 0; |
eb38ed55 |
79 | AliRieman* AliTRDtrackerV1::fgRieman = 0x0; |
80 | TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = 0x0; |
81 | TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = 0x0; |
e4f2f73d |
82 | |
83 | //____________________________________________________________________ |
3a039a31 |
84 | AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) |
41702fec |
85 | :AliTracker() |
06b32d95 |
86 | ,fReconstructor(0x0) |
eb2b4f91 |
87 | ,fGeom(0x0) |
41702fec |
88 | ,fClusters(0x0) |
89 | ,fTracklets(0x0) |
90 | ,fTracks(0x0) |
91 | ,fSieveSeeding(0) |
e4f2f73d |
92 | { |
41702fec |
93 | // |
94 | // Default constructor. |
95 | // |
eb2b4f91 |
96 | |
97 | SetReconstructor(rec); // initialize reconstructor |
98 | |
99 | // initialize geometry |
100 | if(!AliGeomManager::GetGeometry()){ |
101 | AliFatal("Could not get geometry."); |
102 | } |
103 | fGeom = new AliTRDgeometry(); |
104 | fGeom->CreateClusterMatrixArray(); |
105 | TGeoHMatrix *matrix = 0x0; |
106 | Double_t loc[] = {0., 0., 0.}; |
107 | Double_t glb[] = {0., 0., 0.}; |
108 | for(Int_t ily=kNPlanes; ily--;){ |
109 | if(!(matrix = fGeom->GetClusterMatrix(AliTRDgeometry::GetDetector(ily, 2, 0)))){ |
110 | AliFatal(Form("Could not get matrix for chamber @ 0 2 %d.", ily)); |
111 | continue; |
112 | } |
113 | matrix->LocalToMaster(loc, glb); |
114 | fR[ily] = glb[0]+ AliTRDgeometry::AnodePos()-.5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); |
115 | } |
116 | |
117 | // initialize calibration values |
a7ac01d2 |
118 | AliTRDcalibDB *trd = 0x0; |
119 | if (!(trd = AliTRDcalibDB::Instance())) { |
eb2b4f91 |
120 | AliFatal("Could not get calibration."); |
41702fec |
121 | } |
a7ac01d2 |
122 | if(!fgNTimeBins) fgNTimeBins = trd->GetNumberOfTimeBins(); |
41702fec |
123 | |
eb2b4f91 |
124 | // initialize cluster containers |
053767a4 |
125 | for (Int_t isector = 0; isector < AliTRDgeometry::kNsector; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector); |
3a039a31 |
126 | |
eb2b4f91 |
127 | // initialize arrays |
128 | memset(fTrackQuality, 0, kMaxTracksStack*sizeof(Double_t)); |
129 | memset(fSeedLayer, 0, kMaxTracksStack*sizeof(Int_t)); |
130 | memset(fSeedTB, 0, kNSeedPlanes*sizeof(AliTRDchamberTimeBin*)); |
eb38ed55 |
131 | } |
132 | |
e4f2f73d |
133 | //____________________________________________________________________ |
134 | AliTRDtrackerV1::~AliTRDtrackerV1() |
135 | { |
41702fec |
136 | // |
137 | // Destructor |
138 | // |
139 | |
f7ab3117 |
140 | if(fgRieman) delete fgRieman; fgRieman = 0x0; |
141 | if(fgTiltedRieman) delete fgTiltedRieman; fgTiltedRieman = 0x0; |
142 | if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained; fgTiltedRiemanConstrained = 0x0; |
d611c74f |
143 | for(Int_t isl =0; isl<kNSeedPlanes; isl++) if(fSeedTB[isl]) delete fSeedTB[isl]; |
41702fec |
144 | if(fTracks) {fTracks->Delete(); delete fTracks;} |
145 | if(fTracklets) {fTracklets->Delete(); delete fTracklets;} |
48f8adf3 |
146 | if(fClusters) { |
147 | fClusters->Delete(); delete fClusters; |
148 | } |
41702fec |
149 | if(fGeom) delete fGeom; |
e4f2f73d |
150 | } |
151 | |
152 | //____________________________________________________________________ |
153 | Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd) |
154 | { |
41702fec |
155 | // |
156 | // Steering stand alone tracking for full TRD detector |
157 | // |
158 | // Parameters : |
159 | // esd : The ESD event. On output it contains |
160 | // the ESD tracks found in TRD. |
161 | // |
162 | // Output : |
163 | // Number of tracks found in the TRD detector. |
164 | // |
165 | // Detailed description |
166 | // 1. Launch individual SM trackers. |
167 | // See AliTRDtrackerV1::Clusters2TracksSM() for details. |
168 | // |
169 | |
3a039a31 |
170 | if(!fReconstructor->GetRecoParam() ){ |
171 | AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam()."); |
41702fec |
172 | return 0; |
173 | } |
174 | |
175 | //AliInfo("Start Track Finder ..."); |
176 | Int_t ntracks = 0; |
053767a4 |
177 | for(int ism=0; ism<AliTRDgeometry::kNsector; ism++){ |
41702fec |
178 | // for(int ism=1; ism<2; ism++){ |
179 | //AliInfo(Form("Processing supermodule %i ...", ism)); |
180 | ntracks += Clusters2TracksSM(ism, esd); |
181 | } |
182 | AliInfo(Form("Number of found tracks : %d", ntracks)); |
183 | return ntracks; |
e4f2f73d |
184 | } |
185 | |
0906e73e |
186 | |
187 | //_____________________________________________________________________________ |
eb38ed55 |
188 | Bool_t AliTRDtrackerV1::GetTrackPoint(Int_t index, AliTrackPoint &p) const |
0906e73e |
189 | { |
41702fec |
190 | //AliInfo(Form("Asking for tracklet %d", index)); |
191 | |
84eab75a |
192 | // reset position of the point before using it |
193 | p.SetXYZ(0., 0., 0.); |
2f7514a6 |
194 | AliTRDseedV1 *tracklet = GetTracklet(index); |
195 | if (!tracklet) return kFALSE; |
84eab75a |
196 | |
41702fec |
197 | // get detector for this tracklet |
84eab75a |
198 | Int_t idet = tracklet->GetDetector(); |
41702fec |
199 | |
200 | Double_t local[3]; |
201 | local[0] = tracklet->GetX0(); |
202 | local[1] = tracklet->GetYfit(0); |
203 | local[2] = tracklet->GetZfit(0); |
204 | Double_t global[3]; |
205 | fGeom->RotateBack(idet, local, global); |
206 | p.SetXYZ(global[0],global[1],global[2]); |
207 | |
208 | |
209 | // setting volume id |
210 | AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1; |
053767a4 |
211 | switch (fGeom->GetLayer(idet)) { |
41702fec |
212 | case 0: |
213 | iLayer = AliGeomManager::kTRD1; |
214 | break; |
215 | case 1: |
216 | iLayer = AliGeomManager::kTRD2; |
217 | break; |
218 | case 2: |
219 | iLayer = AliGeomManager::kTRD3; |
220 | break; |
221 | case 3: |
222 | iLayer = AliGeomManager::kTRD4; |
223 | break; |
224 | case 4: |
225 | iLayer = AliGeomManager::kTRD5; |
226 | break; |
227 | case 5: |
228 | iLayer = AliGeomManager::kTRD6; |
229 | break; |
230 | }; |
053767a4 |
231 | Int_t modId = fGeom->GetSector(idet) * fGeom->Nstack() + fGeom->GetStack(idet); |
41702fec |
232 | UShort_t volid = AliGeomManager::LayerToVolUID(iLayer, modId); |
233 | p.SetVolumeID(volid); |
234 | |
235 | return kTRUE; |
0906e73e |
236 | } |
237 | |
eb38ed55 |
238 | //____________________________________________________________________ |
239 | TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitter() |
240 | { |
41702fec |
241 | if(!fgTiltedRieman) fgTiltedRieman = new TLinearFitter(4, "hyp4"); |
242 | return fgTiltedRieman; |
eb38ed55 |
243 | } |
0906e73e |
244 | |
eb38ed55 |
245 | //____________________________________________________________________ |
246 | TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitterConstraint() |
247 | { |
41702fec |
248 | if(!fgTiltedRiemanConstrained) fgTiltedRiemanConstrained = new TLinearFitter(2, "hyp2"); |
249 | return fgTiltedRiemanConstrained; |
eb38ed55 |
250 | } |
41702fec |
251 | |
eb38ed55 |
252 | //____________________________________________________________________ |
253 | AliRieman* AliTRDtrackerV1::GetRiemanFitter() |
254 | { |
fac58f00 |
255 | if(!fgRieman) fgRieman = new AliRieman(AliTRDseedV1::kNtb * AliTRDgeometry::kNlayer); |
41702fec |
256 | return fgRieman; |
eb38ed55 |
257 | } |
41702fec |
258 | |
0906e73e |
259 | //_____________________________________________________________________________ |
260 | Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) |
261 | { |
41702fec |
262 | // |
263 | // Gets seeds from ESD event. The seeds are AliTPCtrack's found and |
264 | // backpropagated by the TPC tracker. Each seed is first propagated |
265 | // to the TRD, and then its prolongation is searched in the TRD. |
266 | // If sufficiently long continuation of the track is found in the TRD |
267 | // the track is updated, otherwise it's stored as originaly defined |
268 | // by the TPC tracker. |
269 | // |
270 | |
271 | // Calibration monitor |
272 | AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); |
273 | if (!calibra) AliInfo("Could not get Calibra instance\n"); |
274 | |
eb2b4f91 |
275 | // Define scalers |
276 | Int_t nFound = 0, // number of tracks found |
277 | nSeeds = 0, // total number of ESD seeds |
278 | nTRDseeds= 0, // number of seeds in the TRD acceptance |
279 | nTPCseeds= 0; // number of TPC seeds |
41702fec |
280 | Float_t foundMin = 20.0; |
281 | |
d611c74f |
282 | Float_t *quality = 0x0; |
283 | Int_t *index = 0x0; |
eb2b4f91 |
284 | nSeeds = event->GetNumberOfTracks(); |
285 | // Sort tracks according to quality |
286 | // (covariance in the yz plane) |
287 | if(nSeeds){ |
288 | quality = new Float_t[nSeeds]; |
289 | index = new Int_t[nSeeds]; |
290 | for (Int_t iSeed = nSeeds; iSeed--;) { |
d611c74f |
291 | AliESDtrack *seed = event->GetTrack(iSeed); |
292 | Double_t covariance[15]; |
293 | seed->GetExternalCovariance(covariance); |
294 | quality[iSeed] = covariance[0] + covariance[2]; |
295 | } |
eb2b4f91 |
296 | TMath::Sort(nSeeds, quality, index,kFALSE); |
41702fec |
297 | } |
41702fec |
298 | |
eb2b4f91 |
299 | // Propagate all seeds |
41702fec |
300 | Int_t expectedClr; |
301 | AliTRDtrackV1 track; |
eb2b4f91 |
302 | for (Int_t iSeed = 0; iSeed < nSeeds; iSeed++) { |
41702fec |
303 | |
304 | // Get the seeds in sorted sequence |
305 | AliESDtrack *seed = event->GetTrack(index[iSeed]); |
eb2b4f91 |
306 | Float_t p4 = seed->GetC(seed->GetBz()); |
41702fec |
307 | |
308 | // Check the seed status |
309 | ULong_t status = seed->GetStatus(); |
310 | if ((status & AliESDtrack::kTPCout) == 0) continue; |
311 | if ((status & AliESDtrack::kTRDout) != 0) continue; |
eb2b4f91 |
312 | |
313 | // Propagate to the entrance in the TRD mother volume |
41702fec |
314 | new(&track) AliTRDtrackV1(*seed); |
eb2b4f91 |
315 | if(AliTRDgeometry::GetXtrdBeg() > (fgkMaxStep + track.GetX()) && !PropagateToX(track, AliTRDgeometry::GetXtrdBeg(), fgkMaxStep)){ |
316 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
317 | continue; |
318 | } |
319 | if(!AdjustSector(&track)){ |
320 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
321 | continue; |
322 | } |
323 | if(TMath::Abs(track.GetSnp()) > fgkMaxSnp) { |
324 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
325 | continue; |
326 | } |
327 | |
328 | nTPCseeds++; |
e4d4864b |
329 | |
eb2b4f91 |
330 | // store track status at TRD entrance |
76b60503 |
331 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); |
ae3fbe1f |
332 | |
eb2b4f91 |
333 | // prepare track and do propagation in the TRD |
334 | track.SetReconstructor(fReconstructor); |
335 | track.SetKink(Bool_t(seed->GetKinkIndex(0))); |
336 | expectedClr = FollowBackProlongation(track); |
337 | // check if track entered the TRD fiducial volume |
338 | if(track.GetTrackLow()){ |
339 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDin); |
340 | nTRDseeds++; |
341 | } |
342 | // check if track was stopped in the TRD |
343 | if (expectedClr<0){ |
344 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
345 | continue; |
346 | } |
ae3fbe1f |
347 | |
348 | if(expectedClr){ |
eb2b4f91 |
349 | nFound++; |
41702fec |
350 | // computes PID for track |
351 | track.CookPID(); |
352 | // update calibration references using this track |
353 | if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track); |
354 | // save calibration object |
eb2b4f91 |
355 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
224f357f |
356 | AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track); |
357 | calibTrack->SetOwner(); |
358 | seed->AddCalibObject(calibTrack); |
359 | } |
360 | //update ESD track |
41702fec |
361 | if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) { |
2389e96f |
362 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); |
41702fec |
363 | track.UpdateESDtrack(seed); |
41702fec |
364 | } |
365 | } |
366 | |
27fbeba8 |
367 | if ((TMath::Abs(track.GetC(track.GetBz()) - p4) / TMath::Abs(p4) < 0.2) ||(track.Pt() > 0.8)) { |
e3cf3d02 |
368 | |
41702fec |
369 | // Make backup for back propagation |
41702fec |
370 | Int_t foundClr = track.GetNumberOfClusters(); |
371 | if (foundClr >= foundMin) { |
41702fec |
372 | track.CookLabel(1. - fgkLabelFraction); |
f29f13a6 |
373 | //if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack()); |
41702fec |
374 | |
375 | // Sign only gold tracks |
376 | if (track.GetChi2() / track.GetNumberOfClusters() < 4) { |
f29f13a6 |
377 | //if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)) UseClusters(&track); |
41702fec |
378 | } |
379 | Bool_t isGold = kFALSE; |
380 | |
381 | // Full gold track |
382 | if (track.GetChi2() / track.GetNumberOfClusters() < 5) { |
383 | if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); |
384 | |
385 | isGold = kTRUE; |
386 | } |
387 | |
388 | // Almost gold track |
389 | if ((!isGold) && (track.GetNCross() == 0) && (track.GetChi2() / track.GetNumberOfClusters() < 7)) { |
390 | //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); |
391 | if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); |
392 | |
393 | isGold = kTRUE; |
394 | } |
395 | |
396 | if ((!isGold) && (track.GetBackupTrack())) { |
397 | if ((track.GetBackupTrack()->GetNumberOfClusters() > foundMin) && ((track.GetBackupTrack()->GetChi2()/(track.GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) { |
398 | seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); |
399 | isGold = kTRUE; |
400 | } |
401 | } |
41702fec |
402 | } |
403 | } |
404 | |
eb2b4f91 |
405 | // Propagation to the TOF |
406 | if(!(seed->GetStatus()&AliESDtrack::kTRDStop)) { |
407 | Int_t sm = track.GetSector(); |
408 | // default value in case we have problems with the geometry. |
409 | Double_t xtof = 371.; |
410 | //Calculate radial position of the beginning of the TOF |
411 | //mother volume. In order to avoid mixing of the TRD |
412 | //and TOF modules some hard values are needed. This are: |
413 | //1. The path to the TOF module. |
414 | //2. The width of the TOF (29.05 cm) |
415 | //(with the help of Annalisa de Caro Mar-17-2009) |
416 | if(gGeoManager){ |
417 | gGeoManager->cd(Form("/ALIC_1/B077_1/BSEGMO%d_1/BTOF%d_1", sm, sm)); |
418 | TGeoHMatrix *m = 0x0; |
419 | Double_t loc[]={0., 0., -.5*29.05}, glob[3]; |
420 | |
421 | if((m=gGeoManager->GetCurrentMatrix())){ |
422 | m->LocalToMaster(loc, glob); |
423 | xtof = TMath::Sqrt(glob[0]*glob[0]+glob[1]*glob[1]); |
424 | } |
41702fec |
425 | } |
672b48bd |
426 | if(xtof > (fgkMaxStep + track.GetX()) && !PropagateToX(track, xtof, fgkMaxStep)){ |
427 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
428 | continue; |
429 | } |
430 | if(!AdjustSector(&track)){ |
431 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
432 | continue; |
433 | } |
434 | if(TMath::Abs(track.GetSnp()) > fgkMaxSnp){ |
435 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
436 | continue; |
437 | } |
eb2b4f91 |
438 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); |
439 | // TODO obsolete - delete |
440 | seed->SetTRDQuality(track.StatusForTOF()); |
41702fec |
441 | } |
41702fec |
442 | seed->SetTRDBudget(track.GetBudget(0)); |
443 | } |
d611c74f |
444 | if(index) delete [] index; |
445 | if(quality) delete [] quality; |
41702fec |
446 | |
447 | |
eb2b4f91 |
448 | AliInfo(Form("Number of TPC seeds: %d (%d)", nTRDseeds, nTPCseeds)); |
449 | AliInfo(Form("Number of propagated TRD tracks: %d", nFound)); |
41702fec |
450 | |
d611c74f |
451 | // run stand alone tracking |
3a039a31 |
452 | if (fReconstructor->IsSeeding()) Clusters2Tracks(event); |
41702fec |
453 | |
454 | return 0; |
0906e73e |
455 | } |
456 | |
457 | |
458 | //____________________________________________________________________ |
459 | Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) |
460 | { |
41702fec |
461 | // |
462 | // Refits tracks within the TRD. The ESD event is expected to contain seeds |
463 | // at the outer part of the TRD. |
464 | // The tracks are propagated to the innermost time bin |
465 | // of the TRD and the ESD event is updated |
466 | // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch) |
467 | // |
468 | |
469 | Int_t nseed = 0; // contor for loaded seeds |
470 | Int_t found = 0; // contor for updated TRD tracks |
471 | |
472 | |
473 | AliTRDtrackV1 track; |
474 | for (Int_t itrack = 0; itrack < event->GetNumberOfTracks(); itrack++) { |
475 | AliESDtrack *seed = event->GetTrack(itrack); |
476 | new(&track) AliTRDtrackV1(*seed); |
477 | |
478 | if (track.GetX() < 270.0) { |
479 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); |
480 | continue; |
481 | } |
482 | |
e3cf3d02 |
483 | // reject tracks which failed propagation in the TRD or |
484 | // are produced by the TRD stand alone tracker |
41702fec |
485 | ULong_t status = seed->GetStatus(); |
e3cf3d02 |
486 | if(!(status & AliESDtrack::kTRDout)) continue; |
487 | if(!(status & AliESDtrack::kTRDin)) continue; |
41702fec |
488 | nseed++; |
489 | |
490 | track.ResetCovariance(50.0); |
491 | |
492 | // do the propagation and processing |
493 | Bool_t kUPDATE = kFALSE; |
494 | Double_t xTPC = 250.0; |
495 | if(FollowProlongation(track)){ |
496 | // Prolongate to TPC |
497 | if (PropagateToX(track, xTPC, fgkMaxStep)) { // -with update |
e3cf3d02 |
498 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit); |
499 | found++; |
500 | kUPDATE = kTRUE; |
501 | } |
502 | |
503 | // Update the friend track |
504 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
505 | TObject *o = 0x0; Int_t ic = 0; |
506 | AliTRDtrackV1 *calibTrack = 0x0; |
507 | while((o = seed->GetCalibObject(ic++))){ |
508 | if(!(calibTrack = dynamic_cast<AliTRDtrackV1*>(o))) continue; |
509 | calibTrack->SetTrackHigh(track.GetTrackHigh()); |
510 | } |
41702fec |
511 | } |
e3cf3d02 |
512 | } |
41702fec |
513 | |
514 | // Prolongate to TPC without update |
515 | if(!kUPDATE) { |
516 | AliTRDtrackV1 tt(*seed); |
e3cf3d02 |
517 | if (PropagateToX(tt, xTPC, fgkMaxStep)) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDbackup); |
41702fec |
518 | } |
519 | } |
520 | AliInfo(Form("Number of loaded seeds: %d",nseed)); |
521 | AliInfo(Form("Number of found tracks from loaded seeds: %d",found)); |
522 | |
523 | return 0; |
0906e73e |
524 | } |
525 | |
0906e73e |
526 | //____________________________________________________________________ |
527 | Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) |
528 | { |
41702fec |
529 | // Extrapolates the TRD track in the TPC direction. |
530 | // |
531 | // Parameters |
532 | // t : the TRD track which has to be extrapolated |
533 | // |
534 | // Output |
535 | // number of clusters attached to the track |
536 | // |
537 | // Detailed description |
538 | // |
539 | // Starting from current radial position of track <t> this function |
540 | // extrapolates the track through the 6 TRD layers. The following steps |
541 | // are being performed for each plane: |
542 | // 1. prepare track: |
543 | // a. get plane limits in the local x direction |
544 | // b. check crossing sectors |
545 | // c. check track inclination |
546 | // 2. search tracklet in the tracker list (see GetTracklet() for details) |
547 | // 3. evaluate material budget using the geo manager |
548 | // 4. propagate and update track using the tracklet information. |
549 | // |
550 | // Debug level 2 |
551 | // |
552 | |
e3cf3d02 |
553 | Bool_t kStoreIn = kTRUE; |
41702fec |
554 | Int_t nClustersExpected = 0; |
e3cf3d02 |
555 | for (Int_t iplane = kNPlanes; iplane--;) { |
41702fec |
556 | Int_t index = 0; |
557 | AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); |
558 | if(!tracklet) continue; |
559 | if(!tracklet->IsOK()) AliWarning("tracklet not OK"); |
560 | |
e3cf3d02 |
561 | Double_t x = tracklet->GetX();//GetX0(); |
41702fec |
562 | // reject tracklets which are not considered for inward refit |
563 | if(x > t.GetX()+fgkMaxStep) continue; |
564 | |
565 | // append tracklet to track |
566 | t.SetTracklet(tracklet, index); |
567 | |
568 | if (x < (t.GetX()-fgkMaxStep) && !PropagateToX(t, x+fgkMaxStep, fgkMaxStep)) break; |
569 | if (!AdjustSector(&t)) break; |
570 | |
571 | // Start global position |
572 | Double_t xyz0[3]; |
573 | t.GetXYZ(xyz0); |
574 | |
575 | // End global position |
576 | Double_t alpha = t.GetAlpha(), y, z; |
577 | if (!t.GetProlongation(x,y,z)) break; |
578 | Double_t xyz1[3]; |
579 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); |
580 | xyz1[1] = x * TMath::Sin(alpha) + y * TMath::Cos(alpha); |
581 | xyz1[2] = z; |
582 | |
51a23065 |
583 | Double_t length = TMath::Sqrt( |
584 | (xyz0[0]-xyz1[0])*(xyz0[0]-xyz1[0]) + |
585 | (xyz0[1]-xyz1[1])*(xyz0[1]-xyz1[1]) + |
586 | (xyz0[2]-xyz1[2])*(xyz0[2]-xyz1[2]) |
587 | ); |
588 | if(length>0.){ |
589 | // Get material budget |
590 | Double_t param[7]; |
591 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) break; |
592 | Double_t xrho= param[0]*param[4]; |
593 | Double_t xx0 = param[1]; // Get mean propagation parameters |
594 | |
595 | // Propagate and update |
596 | t.PropagateTo(x, xx0, xrho); |
597 | if (!AdjustSector(&t)) break; |
598 | } |
e3cf3d02 |
599 | if(kStoreIn){ |
600 | t.SetTrackHigh(); |
601 | kStoreIn = kFALSE; |
602 | } |
603 | |
41702fec |
604 | Double_t maxChi2 = t.GetPredictedChi2(tracklet); |
605 | if (maxChi2 < 1e+10 && t.Update(tracklet, maxChi2)){ |
606 | nClustersExpected += tracklet->GetN(); |
607 | } |
608 | } |
609 | |
3a039a31 |
610 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec |
611 | Int_t index; |
51a23065 |
612 | for(int iplane=0; iplane<AliTRDgeometry::kNlayer; iplane++){ |
41702fec |
613 | AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); |
614 | if(!tracklet) continue; |
615 | t.SetTracklet(tracklet, index); |
616 | } |
617 | |
618 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
29f95561 |
619 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
eb2b4f91 |
620 | AliTRDtrackV1 track(t); |
621 | track.SetOwner(); |
41702fec |
622 | cstreamer << "FollowProlongation" |
623 | << "EventNumber=" << eventNumber |
624 | << "ncl=" << nClustersExpected |
eb2b4f91 |
625 | << "track.=" << &track |
41702fec |
626 | << "\n"; |
627 | } |
628 | |
629 | return nClustersExpected; |
0906e73e |
630 | |
631 | } |
632 | |
633 | //_____________________________________________________________________________ |
634 | Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) |
635 | { |
41702fec |
636 | // Extrapolates the TRD track in the TOF direction. |
637 | // |
638 | // Parameters |
639 | // t : the TRD track which has to be extrapolated |
640 | // |
641 | // Output |
642 | // number of clusters attached to the track |
643 | // |
644 | // Detailed description |
645 | // |
646 | // Starting from current radial position of track <t> this function |
647 | // extrapolates the track through the 6 TRD layers. The following steps |
648 | // are being performed for each plane: |
649 | // 1. prepare track: |
650 | // a. get plane limits in the local x direction |
651 | // b. check crossing sectors |
652 | // c. check track inclination |
653 | // 2. build tracklet (see AliTRDseed::AttachClusters() for details) |
654 | // 3. evaluate material budget using the geo manager |
655 | // 4. propagate and update track using the tracklet information. |
656 | // |
657 | // Debug level 2 |
658 | // |
659 | |
eb2b4f91 |
660 | Int_t n = 0; |
661 | Double_t driftLength = .5*AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick(); |
41702fec |
662 | AliTRDtrackingChamber *chamber = 0x0; |
663 | |
3b57a3f7 |
664 | AliTRDseedV1 tracklet, *ptrTracklet = 0x0; |
181d2c97 |
665 | // in case of stand alone tracking we store all the pointers to the tracklets in a temporary array |
666 | AliTRDseedV1 *tracklets[kNPlanes]; |
667 | memset(tracklets, 0, sizeof(AliTRDseedV1 *) * kNPlanes); |
668 | for(Int_t ip = 0; ip < kNPlanes; ip++){ |
669 | tracklets[ip] = t.GetTracklet(ip); |
670 | t.UnsetTracklet(ip); |
671 | } |
e3cf3d02 |
672 | Bool_t kStoreIn = kTRUE; |
673 | |
053767a4 |
674 | // Loop through the TRD layers |
eb2b4f91 |
675 | TGeoHMatrix *matrix = 0x0; |
676 | Double_t x, y, z; |
677 | for (Int_t ily=0, sm=-1, stk=-1, det=-1; ily < AliTRDgeometry::kNlayer; ily++) { |
678 | // rough estimate of the entry point |
679 | if (!t.GetProlongation(fR[ily], y, z)){ |
680 | n=-1; |
681 | t.SetStatus(AliTRDtrackV1::kProlongation); |
682 | break; |
683 | } |
41702fec |
684 | |
eb2b4f91 |
685 | // find sector / stack / detector |
686 | sm = t.GetSector(); |
687 | // TODO cross check with y value ! |
688 | stk = fGeom->GetStack(z, ily); |
689 | det = stk>=0 ? AliTRDgeometry::GetDetector(ily, stk, sm) : -1; |
690 | matrix = det>=0 ? fGeom->GetClusterMatrix(det) : 0x0; |
691 | |
692 | // check if supermodule/chamber is installed |
693 | if( !fGeom->GetSMstatus(sm) || |
694 | stk<0. || |
695 | fGeom->IsHole(ily, stk, sm) || |
696 | !matrix ){ |
697 | // propagate to the default radial position |
698 | if(fR[ily] > (fgkMaxStep + t.GetX()) && !PropagateToX(t, fR[ily], fgkMaxStep)){ |
699 | n=-1; |
700 | t.SetStatus(AliTRDtrackV1::kPropagation); |
41702fec |
701 | break; |
702 | } |
eb2b4f91 |
703 | if(!AdjustSector(&t)){ |
704 | n=-1; |
705 | t.SetStatus(AliTRDtrackV1::kAdjustSector); |
706 | break; |
707 | } |
708 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp){ |
709 | n=-1; |
710 | t.SetStatus(AliTRDtrackV1::kSnp); |
711 | break; |
712 | } |
713 | t.SetStatus(AliTRDtrackV1::kGeometry, ily); |
41702fec |
714 | continue; |
715 | } |
e3cf3d02 |
716 | |
eb2b4f91 |
717 | // retrieve rotation matrix for the current chamber |
718 | Double_t loc[] = {AliTRDgeometry::AnodePos()- driftLength, 0., 0.}; |
719 | Double_t glb[] = {0., 0., 0.}; |
720 | matrix->LocalToMaster(loc, glb); |
721 | |
722 | // Propagate to the radial distance of the current layer |
723 | x = glb[0] - fgkMaxStep; |
724 | if(x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x, fgkMaxStep)){ |
725 | n=-1; |
726 | t.SetStatus(AliTRDtrackV1::kPropagation); |
727 | break; |
728 | } |
729 | if(!AdjustSector(&t)){ |
730 | n=-1; |
731 | t.SetStatus(AliTRDtrackV1::kAdjustSector); |
732 | break; |
733 | } |
734 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) { |
735 | n=-1; |
736 | t.SetStatus(AliTRDtrackV1::kSnp); |
737 | break; |
738 | } |
739 | Bool_t RECALCULATE = kFALSE; |
740 | if(sm != t.GetSector()){ |
741 | sm = t.GetSector(); |
742 | RECALCULATE = kTRUE; |
743 | } |
744 | if(stk != fGeom->GetStack(z, ily)){ |
745 | stk = fGeom->GetStack(z, ily); |
746 | RECALCULATE = kTRUE; |
747 | } |
748 | if(RECALCULATE){ |
749 | det = AliTRDgeometry::GetDetector(ily, stk, sm); |
750 | if(!(matrix = fGeom->GetClusterMatrix(det))){ |
751 | t.SetStatus(AliTRDtrackV1::kGeometry, ily); |
752 | continue; |
753 | } |
754 | matrix->LocalToMaster(loc, glb); |
755 | x = glb[0] - fgkMaxStep; |
756 | } |
757 | |
758 | // check if track is well inside fiducial volume |
759 | if (!t.GetProlongation(x+fgkMaxStep, y, z)) { |
760 | n=-1; |
761 | t.SetStatus(AliTRDtrackV1::kProlongation); |
762 | break; |
763 | } |
764 | if(fGeom->IsOnBoundary(det, y, z, .5)){ |
765 | t.SetStatus(AliTRDtrackV1::kBoundary, ily); |
766 | continue; |
767 | } |
768 | // mark track as entering the FIDUCIAL volume of TRD |
e3cf3d02 |
769 | if(kStoreIn){ |
770 | t.SetTrackLow(); |
771 | kStoreIn = kFALSE; |
772 | } |
b1957d3c |
773 | |
eb2b4f91 |
774 | ptrTracklet = tracklets[ily]; |
775 | if(!ptrTracklet){ // BUILD TRACKLET |
776 | // check data in supermodule |
777 | if(!fTrSec[sm].GetNChambers()){ |
778 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
779 | continue; |
780 | } |
781 | if(fTrSec[sm].GetX(ily) < 1.){ |
782 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
783 | continue; |
784 | } |
785 | |
786 | // check data in chamber |
787 | if(!(chamber = fTrSec[sm].GetChamber(stk, ily))){ |
788 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
789 | continue; |
790 | } |
791 | if(chamber->GetNClusters() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()){ |
792 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
793 | continue; |
794 | } |
795 | // build tracklet |
796 | ptrTracklet = new(&tracklet) AliTRDseedV1(det); |
797 | ptrTracklet->SetReconstructor(fReconstructor); |
798 | ptrTracklet->SetKink(t.IsKink()); |
799 | ptrTracklet->SetPadPlane(fGeom->GetPadPlane(ily, stk)); |
800 | ptrTracklet->SetX0(glb[0]+driftLength); |
801 | if(!tracklet.Init(&t)){ |
802 | n=-1; |
803 | t.SetStatus(AliTRDtrackV1::kTrackletInit); |
804 | break; |
805 | } |
806 | if(!tracklet.AttachClusters(chamber, kTRUE)){ |
807 | t.SetStatus(AliTRDtrackV1::kNoAttach, ily); |
808 | continue; |
809 | } |
810 | if(tracklet.GetN() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()){ |
811 | t.SetStatus(AliTRDtrackV1::kNoClustersTracklet, ily); |
812 | continue; |
813 | } |
814 | ptrTracklet->UpdateUsed(); |
815 | } |
816 | |
817 | // propagate track to the radial position of the tracklet |
818 | ptrTracklet->UseClusters(); // TODO ? do we need this here ? |
819 | // fit tracklet no tilt correction |
820 | if(!ptrTracklet->Fit(kFALSE)){ |
821 | t.SetStatus(AliTRDtrackV1::kNoFit, ily); |
822 | continue; |
823 | } |
824 | x = ptrTracklet->GetX(); //GetX0(); |
825 | if(x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x, fgkMaxStep)) { |
826 | n=-1; |
827 | t.SetStatus(AliTRDtrackV1::kPropagation); |
828 | break; |
829 | } |
830 | if(!AdjustSector(&t)) { |
831 | n=-1; |
832 | t.SetStatus(AliTRDtrackV1::kAdjustSector); |
833 | break; |
41702fec |
834 | } |
eb2b4f91 |
835 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) { |
836 | n=-1; |
837 | t.SetStatus(AliTRDtrackV1::kSnp); |
838 | break; |
839 | } |
840 | |
841 | // update Kalman with the TRD measurement |
842 | Double_t chi2 = t.GetPredictedChi2(ptrTracklet); |
843 | if(chi2>1e+10){ |
844 | t.SetStatus(AliTRDtrackV1::kChi2, ily); |
845 | continue; |
846 | } |
847 | if(!t.Update(ptrTracklet, chi2)) { |
848 | n=-1; |
849 | t.SetStatus(AliTRDtrackV1::kUpdate); |
850 | break; |
851 | } |
852 | |
853 | // load tracklet to the tracker |
854 | ptrTracklet->UpDate(&t); |
855 | ptrTracklet = SetTracklet(ptrTracklet); |
856 | t.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); |
857 | n += ptrTracklet->GetN(); |
858 | |
41702fec |
859 | // Reset material budget if 2 consecutive gold |
eb2b4f91 |
860 | // if(ilayer>0 && t.GetTracklet(ilayer-1) && ptrTracklet->GetN() + t.GetTracklet(ilayer-1)->GetN() > 20) t.SetBudget(2, 0.); |
41702fec |
861 | |
862 | // Make backup of the track until is gold |
863 | // TO DO update quality check of the track. |
864 | // consider comparison with fTimeBinsRange |
865 | Float_t ratio0 = ptrTracklet->GetN() / Float_t(fgNTimeBins); |
866 | //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1); |
41702fec |
867 | |
eb2b4f91 |
868 | if( (chi2 < 18.0) && |
41702fec |
869 | (ratio0 > 0.8) && |
870 | //(ratio1 > 0.6) && |
871 | //(ratio0+ratio1 > 1.5) && |
872 | (t.GetNCross() == 0) && |
873 | (TMath::Abs(t.GetSnp()) < 0.85) && |
e3cf3d02 |
874 | (t.GetNumberOfClusters() > 20)){ |
875 | t.MakeBackupTrack(); |
876 | } |
053767a4 |
877 | } // end layers loop |
eb2b4f91 |
878 | //printf("clusters[%d] chi2[%f] x[%f] status[%d ", n, t.GetChi2(), t.GetX(), t.GetStatusTRD()); |
879 | //for(int i=0; i<6; i++) printf("%d ", t.GetStatusTRD(i)); printf("]\n"); |
41702fec |
880 | |
3a039a31 |
881 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
29f95561 |
882 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
883 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
eb2b4f91 |
884 | AliTRDtrackV1 track(t); |
885 | track.SetOwner(); |
41702fec |
886 | cstreamer << "FollowBackProlongation" |
eb2b4f91 |
887 | << "EventNumber=" << eventNumber |
888 | << "ncl=" << n |
889 | << "track.=" << &track |
41702fec |
890 | << "\n"; |
891 | } |
892 | |
eb2b4f91 |
893 | return n; |
0906e73e |
894 | } |
895 | |
eb38ed55 |
896 | //_________________________________________________________________________ |
897 | Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes){ |
41702fec |
898 | // |
899 | // Fits a Riemann-circle to the given points without tilting pad correction. |
900 | // The fit is performed using an instance of the class AliRieman (equations |
901 | // and transformations see documentation of this class) |
902 | // Afterwards all the tracklets are Updated |
903 | // |
904 | // Parameters: - Array of tracklets (AliTRDseedV1) |
905 | // - Storage for the chi2 values (beginning with direction z) |
906 | // - Seeding configuration |
907 | // Output: - The curvature |
908 | // |
909 | AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); |
910 | fitter->Reset(); |
911 | Int_t allplanes[] = {0, 1, 2, 3, 4, 5}; |
912 | Int_t *ppl = &allplanes[0]; |
913 | Int_t maxLayers = 6; |
914 | if(planes){ |
915 | maxLayers = 4; |
916 | ppl = planes; |
917 | } |
918 | for(Int_t il = 0; il < maxLayers; il++){ |
919 | if(!tracklets[ppl[il]].IsOK()) continue; |
e3cf3d02 |
920 | fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfit(0), tracklets[ppl[il]].GetZfit(0),1,10); |
41702fec |
921 | } |
922 | fitter->Update(); |
923 | // Set the reference position of the fit and calculate the chi2 values |
924 | memset(chi2, 0, sizeof(Double_t) * 2); |
925 | for(Int_t il = 0; il < maxLayers; il++){ |
926 | // Reference positions |
927 | tracklets[ppl[il]].Init(fitter); |
928 | |
929 | // chi2 |
930 | if((!tracklets[ppl[il]].IsOK()) && (!planes)) continue; |
931 | chi2[0] += tracklets[ppl[il]].GetChi2Y(); |
932 | chi2[1] += tracklets[ppl[il]].GetChi2Z(); |
933 | } |
934 | return fitter->GetC(); |
eb38ed55 |
935 | } |
936 | |
937 | //_________________________________________________________________________ |
938 | void AliTRDtrackerV1::FitRieman(AliTRDcluster **seedcl, Double_t chi2[2]) |
939 | { |
41702fec |
940 | // |
941 | // Performs a Riemann helix fit using the seedclusters as spacepoints |
942 | // Afterwards the chi2 values are calculated and the seeds are updated |
943 | // |
944 | // Parameters: - The four seedclusters |
945 | // - The tracklet array (AliTRDseedV1) |
946 | // - The seeding configuration |
947 | // - Chi2 array |
948 | // |
949 | // debug level 2 |
950 | // |
951 | AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); |
952 | fitter->Reset(); |
953 | for(Int_t i = 0; i < 4; i++) |
954 | fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1, 10); |
955 | fitter->Update(); |
956 | |
957 | |
958 | // Update the seed and calculated the chi2 value |
959 | chi2[0] = 0; chi2[1] = 0; |
960 | for(Int_t ipl = 0; ipl < kNSeedPlanes; ipl++){ |
961 | // chi2 |
962 | chi2[0] += (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())); |
963 | chi2[1] += (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())); |
964 | } |
eb38ed55 |
965 | } |
966 | |
967 | |
968 | //_________________________________________________________________________ |
969 | Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex) |
970 | { |
41702fec |
971 | // |
972 | // Fits a helix to the clusters. Pad tilting is considered. As constraint it is |
973 | // assumed that the vertex position is set to 0. |
974 | // This method is very usefull for high-pt particles |
975 | // Basis for the fit: (x - x0)^2 + (y - y0)^2 - R^2 = 0 |
976 | // x0, y0: Center of the circle |
977 | // Measured y-position: ymeas = y - tan(phiT)(zc - zt) |
978 | // zc: center of the pad row |
979 | // Equation which has to be fitted (after transformation): |
980 | // a + b * u + e * v + 2*(ymeas + tan(phiT)(z - zVertex))*t = 0 |
981 | // Transformation: |
982 | // t = 1/(x^2 + y^2) |
983 | // u = 2 * x * t |
984 | // v = 2 * x * tan(phiT) * t |
985 | // Parameters in the equation: |
986 | // a = -1/y0, b = x0/y0, e = dz/dx |
987 | // |
988 | // The Curvature is calculated by the following equation: |
989 | // - curv = a/Sqrt(b^2 + 1) = 1/R |
990 | // Parameters: - the 6 tracklets |
991 | // - the Vertex constraint |
992 | // Output: - the Chi2 value of the track |
993 | // |
994 | // debug level 5 |
995 | // |
996 | |
997 | TLinearFitter *fitter = GetTiltedRiemanFitterConstraint(); |
998 | fitter->StoreData(kTRUE); |
999 | fitter->ClearPoints(); |
1000 | AliTRDcluster *cl = 0x0; |
1001 | |
1002 | Float_t x, y, z, w, t, error, tilt; |
1003 | Double_t uvt[2]; |
1004 | Int_t nPoints = 0; |
053767a4 |
1005 | for(Int_t ilr = 0; ilr < AliTRDgeometry::kNlayer; ilr++){ |
1006 | if(!tracklets[ilr].IsOK()) continue; |
8d2bec9e |
1007 | for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ |
053767a4 |
1008 | if(!tracklets[ilr].IsUsable(itb)) continue; |
1009 | cl = tracklets[ilr].GetClusters(itb); |
41702fec |
1010 | x = cl->GetX(); |
1011 | y = cl->GetY(); |
1012 | z = cl->GetZ(); |
053767a4 |
1013 | tilt = tracklets[ilr].GetTilt(); |
41702fec |
1014 | // Transformation |
1015 | t = 1./(x * x + y * y); |
1016 | uvt[0] = 2. * x * t; |
1017 | uvt[1] = 2. * x * t * tilt ; |
1018 | w = 2. * (y + tilt * (z - zVertex)) * t; |
f29f13a6 |
1019 | error = 2. * TMath::Sqrt(cl->GetSigmaY2()) * t; |
41702fec |
1020 | fitter->AddPoint(uvt, w, error); |
1021 | nPoints++; |
1022 | } |
1023 | } |
1024 | fitter->Eval(); |
1025 | |
1026 | // Calculate curvature |
1027 | Double_t a = fitter->GetParameter(0); |
1028 | Double_t b = fitter->GetParameter(1); |
1029 | Double_t curvature = a/TMath::Sqrt(b*b + 1); |
1030 | |
1031 | Float_t chi2track = fitter->GetChisquare()/Double_t(nPoints); |
1032 | for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++) |
e3cf3d02 |
1033 | tracklets[ip].SetC(curvature); |
41702fec |
1034 | |
3a039a31 |
1035 | /* if(fReconstructor->GetStreamLevel() >= 5){ |
41702fec |
1036 | //Linear Model on z-direction |
1037 | Double_t xref = CalculateReferenceX(tracklets); // Relative to the middle of the stack |
1038 | Double_t slope = fitter->GetParameter(2); |
1039 | Double_t zref = slope * xref; |
1040 | Float_t chi2Z = CalculateChi2Z(tracklets, zref, slope, xref); |
1041 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
1042 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
29f95561 |
1043 | TTreeSRedirector &treeStreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
1044 | treeStreamer << "FitTiltedRiemanConstraint" |
1045 | << "EventNumber=" << eventNumber |
1046 | << "CandidateNumber=" << candidateNumber |
1047 | << "Curvature=" << curvature |
1048 | << "Chi2Track=" << chi2track |
1049 | << "Chi2Z=" << chi2Z |
1050 | << "zref=" << zref |
1051 | << "\n"; |
3a039a31 |
1052 | }*/ |
41702fec |
1053 | return chi2track; |
eb38ed55 |
1054 | } |
1055 | |
1056 | //_________________________________________________________________________ |
1057 | Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError) |
1058 | { |
41702fec |
1059 | // |
1060 | // Performs a Riemann fit taking tilting pad correction into account |
1061 | // The equation of a Riemann circle, where the y position is substituted by the |
1062 | // measured y-position taking pad tilting into account, has to be transformed |
1063 | // into a 4-dimensional hyperplane equation |
1064 | // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 |
1065 | // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) |
1066 | // zc: center of the pad row |
1067 | // zt: z-position of the track |
1068 | // The z-position of the track is assumed to be linear dependent on the x-position |
1069 | // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 |
1070 | // Transformation: u = 2 * x * t |
1071 | // v = 2 * tan(phiT) * t |
1072 | // w = 2 * tan(phiT) * (x - xref) * t |
1073 | // t = 1 / (x^2 + ymeas^2) |
1074 | // Parameters: a = -1/y0 |
1075 | // b = x0/y0 |
1076 | // c = (R^2 -x0^2 - y0^2)/y0 |
1077 | // d = offset |
1078 | // e = dz/dx |
1079 | // If the offset respectively the slope in z-position is impossible, the parameters are fixed using |
1080 | // results from the simple riemann fit. Afterwards the fit is redone. |
1081 | // The curvature is calculated according to the formula: |
1082 | // curv = a/(1 + b^2 + c*a) = 1/R |
1083 | // |
1084 | // Paramters: - Array of tracklets (connected to the track candidate) |
1085 | // - Flag selecting the error definition |
1086 | // Output: - Chi2 values of the track (in Parameter list) |
1087 | // |
1088 | TLinearFitter *fitter = GetTiltedRiemanFitter(); |
1089 | fitter->StoreData(kTRUE); |
1090 | fitter->ClearPoints(); |
1091 | AliTRDLeastSquare zfitter; |
1092 | AliTRDcluster *cl = 0x0; |
1093 | |
1094 | Double_t xref = CalculateReferenceX(tracklets); |
1095 | Double_t x, y, z, t, tilt, dx, w, we; |
1096 | Double_t uvt[4]; |
1097 | Int_t nPoints = 0; |
1098 | // Containers for Least-square fitter |
1099 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1100 | if(!tracklets[ipl].IsOK()) continue; |
ed15ef4f |
1101 | tilt = tracklets[ipl].GetTilt(); |
8d2bec9e |
1102 | for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ |
41702fec |
1103 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1104 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1105 | x = cl->GetX(); |
1106 | y = cl->GetY(); |
1107 | z = cl->GetZ(); |
41702fec |
1108 | dx = x - xref; |
1109 | // Transformation |
1110 | t = 1./(x*x + y*y); |
1111 | uvt[0] = 2. * x * t; |
1112 | uvt[1] = t; |
1113 | uvt[2] = 2. * tilt * t; |
1114 | uvt[3] = 2. * tilt * dx * t; |
1115 | w = 2. * (y + tilt*z) * t; |
1116 | // error definition changes for the different calls |
1117 | we = 2. * t; |
f29f13a6 |
1118 | we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()) : 0.2; |
41702fec |
1119 | fitter->AddPoint(uvt, w, we); |
1120 | zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); |
1121 | nPoints++; |
1122 | } |
1123 | } |
1124 | fitter->Eval(); |
1125 | zfitter.Eval(); |
1126 | |
1127 | Double_t offset = fitter->GetParameter(3); |
1128 | Double_t slope = fitter->GetParameter(4); |
1129 | |
1130 | // Linear fitter - not possible to make boundaries |
1131 | // Do not accept non possible z and dzdx combinations |
1132 | Bool_t acceptablez = kTRUE; |
1133 | Double_t zref = 0.0; |
1134 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
1135 | if(!tracklets[iLayer].IsOK()) continue; |
1136 | zref = offset + slope * (tracklets[iLayer].GetX0() - xref); |
e3cf3d02 |
1137 | if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) |
41702fec |
1138 | acceptablez = kFALSE; |
1139 | } |
1140 | if (!acceptablez) { |
1141 | Double_t dzmf = zfitter.GetFunctionParameter(1); |
1142 | Double_t zmf = zfitter.GetFunctionValue(&xref); |
1143 | fgTiltedRieman->FixParameter(3, zmf); |
1144 | fgTiltedRieman->FixParameter(4, dzmf); |
1145 | fitter->Eval(); |
1146 | fitter->ReleaseParameter(3); |
1147 | fitter->ReleaseParameter(4); |
1148 | offset = fitter->GetParameter(3); |
1149 | slope = fitter->GetParameter(4); |
1150 | } |
1151 | |
1152 | // Calculate Curvarture |
1153 | Double_t a = fitter->GetParameter(0); |
1154 | Double_t b = fitter->GetParameter(1); |
1155 | Double_t c = fitter->GetParameter(2); |
1156 | Double_t curvature = 1.0 + b*b - c*a; |
1157 | if (curvature > 0.0) |
1158 | curvature = a / TMath::Sqrt(curvature); |
1159 | |
1160 | Double_t chi2track = fitter->GetChisquare()/Double_t(nPoints); |
1161 | |
1162 | // Update the tracklets |
1163 | Double_t dy, dz; |
1164 | for(Int_t iLayer = 0; iLayer < AliTRDtrackerV1::kNPlanes; iLayer++) { |
1165 | |
1166 | x = tracklets[iLayer].GetX0(); |
1167 | y = 0; |
1168 | z = 0; |
1169 | dy = 0; |
1170 | dz = 0; |
1171 | |
1172 | // y: R^2 = (x - x0)^2 + (y - y0)^2 |
1173 | // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) |
1174 | // R = Sqrt() = 1/Curvature |
1175 | // => y = y0 +/- Sqrt(1/Curvature^2 - (x - x0)^2) |
1176 | Double_t res = (x * a + b); // = (x - x0)/y0 |
1177 | res *= res; |
1178 | res = 1.0 - c * a + b * b - res; // = (R^2 - (x - x0)^2)/y0^2 |
1179 | if (res >= 0) { |
1180 | res = TMath::Sqrt(res); |
1181 | y = (1.0 - res) / a; |
1182 | } |
1183 | |
1184 | // dy: R^2 = (x - x0)^2 + (y - y0)^2 |
1185 | // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0 |
1186 | // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) |
1187 | // Curvature: cr = 1/R = a/Sqrt(1 + b^2 - c*a) |
1188 | // => dy/dx = (x - x0)/(1/(cr^2) - (x - x0)^2) |
1189 | Double_t x0 = -b / a; |
1190 | if (-c * a + b * b + 1 > 0) { |
1191 | if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) { |
1192 | Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0)); |
1193 | if (a < 0) yderiv *= -1.0; |
1194 | dy = yderiv; |
1195 | } |
1196 | } |
1197 | z = offset + slope * (x - xref); |
1198 | dz = slope; |
1199 | tracklets[iLayer].SetYref(0, y); |
1200 | tracklets[iLayer].SetYref(1, dy); |
1201 | tracklets[iLayer].SetZref(0, z); |
1202 | tracklets[iLayer].SetZref(1, dz); |
1203 | tracklets[iLayer].SetC(curvature); |
1204 | tracklets[iLayer].SetChi2(chi2track); |
1205 | } |
1206 | |
3a039a31 |
1207 | /* if(fReconstructor->GetStreamLevel() >=5){ |
29f95561 |
1208 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
1209 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
1210 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
1211 | Double_t chi2z = CalculateChi2Z(tracklets, offset, slope, xref); |
1212 | cstreamer << "FitTiltedRieman0" |
1213 | << "EventNumber=" << eventNumber |
1214 | << "CandidateNumber=" << candidateNumber |
1215 | << "xref=" << xref |
1216 | << "Chi2Z=" << chi2z |
1217 | << "\n"; |
3a039a31 |
1218 | }*/ |
41702fec |
1219 | return chi2track; |
eb38ed55 |
1220 | } |
1221 | |
3b57a3f7 |
1222 | |
9e333711 |
1223 | //____________________________________________________________________ |
6e4d4425 |
1224 | Double_t AliTRDtrackerV1::FitLine(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t err, Int_t np, AliTrackPoint *points) |
9e333711 |
1225 | { |
1226 | AliTRDLeastSquare yfitter, zfitter; |
1227 | AliTRDcluster *cl = 0x0; |
1228 | |
1229 | AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; |
1230 | if(!tracklets){ |
1231 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1232 | if(!(tracklet = track->GetTracklet(ipl))) continue; |
1233 | if(!tracklet->IsOK()) continue; |
1234 | new(&work[ipl]) AliTRDseedV1(*tracklet); |
1235 | } |
1236 | tracklets = &work[0]; |
1237 | } |
1238 | |
1239 | Double_t xref = CalculateReferenceX(tracklets); |
1240 | Double_t x, y, z, dx, ye, yr, tilt; |
1241 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1242 | if(!tracklets[ipl].IsOK()) continue; |
1243 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ |
1244 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1245 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1246 | x = cl->GetX(); |
1247 | z = cl->GetZ(); |
1248 | dx = x - xref; |
1249 | zfitter.AddPoint(&dx, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); |
1250 | } |
1251 | } |
1252 | zfitter.Eval(); |
1253 | Double_t z0 = zfitter.GetFunctionParameter(0); |
1254 | Double_t dzdx = zfitter.GetFunctionParameter(1); |
1255 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1256 | if(!tracklets[ipl].IsOK()) continue; |
1257 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ |
1258 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1259 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1260 | x = cl->GetX(); |
1261 | y = cl->GetY(); |
1262 | z = cl->GetZ(); |
1263 | tilt = tracklets[ipl].GetTilt(); |
1264 | dx = x - xref; |
1265 | yr = y + tilt*(z - z0 - dzdx*dx); |
1266 | // error definition changes for the different calls |
1267 | ye = tilt*TMath::Sqrt(cl->GetSigmaZ2()); |
1268 | ye += err ? tracklets[ipl].GetSigmaY() : 0.2; |
1269 | yfitter.AddPoint(&dx, yr, ye); |
1270 | } |
1271 | } |
1272 | yfitter.Eval(); |
1273 | Double_t y0 = yfitter.GetFunctionParameter(0); |
1274 | Double_t dydx = yfitter.GetFunctionParameter(1); |
1275 | Double_t chi2 = 0.;//yfitter.GetChisquare()/Double_t(nPoints); |
1276 | |
1277 | //update track points array |
1278 | if(np && points){ |
1279 | Float_t xyz[3]; |
1280 | for(int ip=0; ip<np; ip++){ |
1281 | points[ip].GetXYZ(xyz); |
1282 | xyz[1] = y0 + dydx * (xyz[0] - xref); |
1283 | xyz[2] = z0 + dzdx * (xyz[0] - xref); |
1284 | points[ip].SetXYZ(xyz); |
1285 | } |
1286 | } |
1287 | return chi2; |
1288 | } |
1289 | |
1290 | |
3b57a3f7 |
1291 | //_________________________________________________________________________ |
6e4d4425 |
1292 | Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t sigError, Int_t np, AliTrackPoint *points) |
3b57a3f7 |
1293 | { |
41702fec |
1294 | // |
1295 | // Performs a Riemann fit taking tilting pad correction into account |
1296 | // The equation of a Riemann circle, where the y position is substituted by the |
1297 | // measured y-position taking pad tilting into account, has to be transformed |
1298 | // into a 4-dimensional hyperplane equation |
1299 | // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 |
1300 | // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) |
1301 | // zc: center of the pad row |
1302 | // zt: z-position of the track |
1303 | // The z-position of the track is assumed to be linear dependent on the x-position |
1304 | // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 |
1305 | // Transformation: u = 2 * x * t |
1306 | // v = 2 * tan(phiT) * t |
1307 | // w = 2 * tan(phiT) * (x - xref) * t |
1308 | // t = 1 / (x^2 + ymeas^2) |
1309 | // Parameters: a = -1/y0 |
1310 | // b = x0/y0 |
1311 | // c = (R^2 -x0^2 - y0^2)/y0 |
1312 | // d = offset |
1313 | // e = dz/dx |
1314 | // If the offset respectively the slope in z-position is impossible, the parameters are fixed using |
1315 | // results from the simple riemann fit. Afterwards the fit is redone. |
1316 | // The curvature is calculated according to the formula: |
1317 | // curv = a/(1 + b^2 + c*a) = 1/R |
1318 | // |
1319 | // Paramters: - Array of tracklets (connected to the track candidate) |
1320 | // - Flag selecting the error definition |
1321 | // Output: - Chi2 values of the track (in Parameter list) |
1322 | // |
1323 | TLinearFitter *fitter = GetTiltedRiemanFitter(); |
1324 | fitter->StoreData(kTRUE); |
1325 | fitter->ClearPoints(); |
1326 | AliTRDLeastSquare zfitter; |
1327 | AliTRDcluster *cl = 0x0; |
3b57a3f7 |
1328 | |
1329 | AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; |
1330 | if(!tracklets){ |
1331 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1332 | if(!(tracklet = track->GetTracklet(ipl))) continue; |
1333 | if(!tracklet->IsOK()) continue; |
1334 | new(&work[ipl]) AliTRDseedV1(*tracklet); |
1335 | } |
1336 | tracklets = &work[0]; |
1337 | } |
1338 | |
41702fec |
1339 | Double_t xref = CalculateReferenceX(tracklets); |
1340 | Double_t x, y, z, t, tilt, dx, w, we; |
1341 | Double_t uvt[4]; |
1342 | Int_t nPoints = 0; |
1343 | // Containers for Least-square fitter |
1344 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1345 | if(!tracklets[ipl].IsOK()) continue; |
8d2bec9e |
1346 | for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ |
41702fec |
1347 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1348 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1349 | x = cl->GetX(); |
1350 | y = cl->GetY(); |
1351 | z = cl->GetZ(); |
1352 | tilt = tracklets[ipl].GetTilt(); |
1353 | dx = x - xref; |
1354 | // Transformation |
1355 | t = 1./(x*x + y*y); |
1356 | uvt[0] = 2. * x * t; |
1357 | uvt[1] = t; |
1358 | uvt[2] = 2. * tilt * t; |
1359 | uvt[3] = 2. * tilt * dx * t; |
1360 | w = 2. * (y + tilt*z) * t; |
1361 | // error definition changes for the different calls |
1362 | we = 2. * t; |
f29f13a6 |
1363 | we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()) : 0.2; |
41702fec |
1364 | fitter->AddPoint(uvt, w, we); |
1365 | zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); |
1366 | nPoints++; |
1367 | } |
1368 | } |
aec26713 |
1369 | if(fitter->Eval()) return 1.E10; |
1370 | |
41702fec |
1371 | Double_t z0 = fitter->GetParameter(3); |
1372 | Double_t dzdx = fitter->GetParameter(4); |
3b57a3f7 |
1373 | |
1374 | |
1375 | // Linear fitter - not possible to make boundaries |
1376 | // Do not accept non possible z and dzdx combinations |
1377 | Bool_t accept = kTRUE; |
1378 | Double_t zref = 0.0; |
1379 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
1380 | if(!tracklets[iLayer].IsOK()) continue; |
1381 | zref = z0 + dzdx * (tracklets[iLayer].GetX0() - xref); |
e3cf3d02 |
1382 | if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) |
3b57a3f7 |
1383 | accept = kFALSE; |
1384 | } |
1385 | if (!accept) { |
41702fec |
1386 | zfitter.Eval(); |
3b57a3f7 |
1387 | Double_t dzmf = zfitter.GetFunctionParameter(1); |
1388 | Double_t zmf = zfitter.GetFunctionValue(&xref); |
1389 | fitter->FixParameter(3, zmf); |
1390 | fitter->FixParameter(4, dzmf); |
1391 | fitter->Eval(); |
1392 | fitter->ReleaseParameter(3); |
1393 | fitter->ReleaseParameter(4); |
1394 | z0 = fitter->GetParameter(3); // = zmf ? |
1395 | dzdx = fitter->GetParameter(4); // = dzmf ? |
1396 | } |
1397 | |
1398 | // Calculate Curvature |
1399 | Double_t a = fitter->GetParameter(0); |
1400 | Double_t b = fitter->GetParameter(1); |
1401 | Double_t c = fitter->GetParameter(2); |
1402 | Double_t y0 = 1. / a; |
1403 | Double_t x0 = -b * y0; |
a015e406 |
1404 | Double_t tmp = y0*y0 + x0*x0 - c*y0; |
1405 | if(tmp<=0.) return 1.E10; |
1406 | Double_t R = TMath::Sqrt(tmp); |
3b57a3f7 |
1407 | Double_t C = 1.0 + b*b - c*a; |
1408 | if (C > 0.0) C = a / TMath::Sqrt(C); |
1409 | |
1410 | // Calculate chi2 of the fit |
1411 | Double_t chi2 = fitter->GetChisquare()/Double_t(nPoints); |
1412 | |
1413 | // Update the tracklets |
1414 | if(!track){ |
1415 | for(Int_t ip = 0; ip < kNPlanes; ip++) { |
1416 | x = tracklets[ip].GetX0(); |
90cf7133 |
1417 | tmp = R*R-(x-x0)*(x-x0); |
a015e406 |
1418 | if(tmp <= 0.) continue; |
1419 | tmp = TMath::Sqrt(tmp); |
3b57a3f7 |
1420 | |
1421 | // y: R^2 = (x - x0)^2 + (y - y0)^2 |
1422 | // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) |
1423 | tracklets[ip].SetYref(0, y0 - (y0>0.?1.:-1)*tmp); |
1424 | // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) |
1425 | tracklets[ip].SetYref(1, (x - x0) / tmp); |
1426 | tracklets[ip].SetZref(0, z0 + dzdx * (x - xref)); |
1427 | tracklets[ip].SetZref(1, dzdx); |
1428 | tracklets[ip].SetC(C); |
1429 | tracklets[ip].SetChi2(chi2); |
1430 | } |
1431 | } |
3b57a3f7 |
1432 | //update track points array |
1433 | if(np && points){ |
1434 | Float_t xyz[3]; |
1435 | for(int ip=0; ip<np; ip++){ |
1436 | points[ip].GetXYZ(xyz); |
60e55aee |
1437 | 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 |
1438 | xyz[2] = z0 + dzdx * (xyz[0] - xref); |
1439 | points[ip].SetXYZ(xyz); |
1440 | } |
1441 | } |
1442 | |
3b57a3f7 |
1443 | return chi2; |
1444 | } |
1445 | |
1446 | |
1bf51039 |
1447 | //____________________________________________________________________ |
1448 | Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t up, Int_t np, AliTrackPoint *points) |
1449 | { |
1450 | // Kalman filter implementation for the TRD. |
1451 | // It returns the positions of the fit in the array "points" |
1452 | // |
1453 | // Author : A.Bercuci@gsi.de |
1454 | |
3cfaffa4 |
1455 | // printf("Start track @ x[%f]\n", track->GetX()); |
1bf51039 |
1456 | |
1457 | //prepare marker points along the track |
1458 | Int_t ip = np ? 0 : 1; |
1459 | while(ip<np){ |
1460 | if((up?-1:1) * (track->GetX() - points[ip].GetX()) > 0.) break; |
1461 | //printf("AliTRDtrackerV1::FitKalman() : Skip track marker x[%d] = %7.3f. Before track start ( %7.3f ).\n", ip, points[ip].GetX(), track->GetX()); |
1462 | ip++; |
1463 | } |
1464 | //if(points) printf("First marker point @ x[%d] = %f\n", ip, points[ip].GetX()); |
1465 | |
1466 | |
1467 | AliTRDseedV1 tracklet, *ptrTracklet = 0x0; |
1468 | |
1469 | //Loop through the TRD planes |
1470 | for (Int_t jplane = 0; jplane < kNPlanes; jplane++) { |
1471 | // GET TRACKLET OR BUILT IT |
1472 | Int_t iplane = up ? jplane : kNPlanes - 1 - jplane; |
1473 | if(tracklets){ |
1474 | if(!(ptrTracklet = &tracklets[iplane])) continue; |
1475 | }else{ |
1476 | if(!(ptrTracklet = track->GetTracklet(iplane))){ |
1477 | /*AliTRDtrackerV1 *tracker = 0x0; |
1478 | if(!(tracker = dynamic_cast<AliTRDtrackerV1*>( AliTRDReconstructor::Tracker()))) continue; |
1479 | ptrTracklet = new(&tracklet) AliTRDseedV1(iplane); |
1480 | if(!tracker->MakeTracklet(ptrTracklet, track)) */ |
1481 | continue; |
1482 | } |
1483 | } |
1484 | if(!ptrTracklet->IsOK()) continue; |
1485 | |
1486 | Double_t x = ptrTracklet->GetX0(); |
1487 | |
1488 | while(ip < np){ |
1489 | //don't do anything if next marker is after next update point. |
1490 | if((up?-1:1) * (points[ip].GetX() - x) - fgkMaxStep < 0) break; |
1bf51039 |
1491 | if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; |
1492 | |
1493 | Double_t xyz[3]; // should also get the covariance |
3cfaffa4 |
1494 | track->GetXYZ(xyz); |
1495 | track->Global2LocalPosition(xyz, track->GetAlpha()); |
1496 | points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]); |
1bf51039 |
1497 | ip++; |
1498 | } |
3cfaffa4 |
1499 | // printf("plane[%d] tracklet[%p] x[%f]\n", iplane, ptrTracklet, x); |
1bf51039 |
1500 | |
3cfaffa4 |
1501 | // Propagate closer to the next update point |
1bf51039 |
1502 | if(((up?-1:1) * (x - track->GetX()) + fgkMaxStep < 0) && !PropagateToX(*track, x + (up?-1:1)*fgkMaxStep, fgkMaxStep)) return -1.; |
1503 | |
1504 | if(!AdjustSector(track)) return -1; |
1505 | if(TMath::Abs(track->GetSnp()) > fgkMaxSnp) return -1; |
1506 | |
1507 | //load tracklet to the tracker and the track |
1508 | /* Int_t index; |
1509 | if((index = FindTracklet(ptrTracklet)) < 0){ |
1510 | ptrTracklet = SetTracklet(&tracklet); |
1511 | index = fTracklets->GetEntriesFast()-1; |
1512 | } |
1513 | track->SetTracklet(ptrTracklet, index);*/ |
1514 | |
1515 | |
1516 | // register tracklet to track with tracklet creation !! |
1517 | // PropagateBack : loaded tracklet to the tracker and update index |
1518 | // RefitInward : update index |
1519 | // MakeTrack : loaded tracklet to the tracker and update index |
1520 | if(!tracklets) track->SetTracklet(ptrTracklet, -1); |
1521 | |
1522 | |
1523 | //Calculate the mean material budget along the path inside the chamber |
1524 | Double_t xyz0[3]; track->GetXYZ(xyz0); |
1525 | Double_t alpha = track->GetAlpha(); |
1526 | Double_t xyz1[3], y, z; |
1527 | if(!track->GetProlongation(x, y, z)) return -1; |
1528 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); |
1529 | xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha); |
1530 | xyz1[2] = z; |
3cfaffa4 |
1531 | 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 |
1532 | Double_t param[7]; |
3cfaffa4 |
1533 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param) <=0.) break; |
1bf51039 |
1534 | Double_t xrho = param[0]*param[4]; // density*length |
1535 | Double_t xx0 = param[1]; // radiation length |
1536 | |
1537 | //Propagate the track |
1538 | track->PropagateTo(x, xx0, xrho); |
1539 | if (!AdjustSector(track)) break; |
1540 | |
1541 | //Update track |
1542 | Double_t chi2 = track->GetPredictedChi2(ptrTracklet); |
1543 | if(chi2<1e+10) track->Update(ptrTracklet, chi2); |
1bf51039 |
1544 | if(!up) continue; |
1545 | |
1546 | //Reset material budget if 2 consecutive gold |
1547 | if(iplane>0 && track->GetTracklet(iplane-1) && ptrTracklet->GetN() + track->GetTracklet(iplane-1)->GetN() > 20) track->SetBudget(2, 0.); |
1548 | } // end planes loop |
1549 | |
1550 | // extrapolation |
1551 | while(ip < np){ |
1552 | if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; |
1553 | |
1554 | Double_t xyz[3]; // should also get the covariance |
3cfaffa4 |
1555 | track->GetXYZ(xyz); |
1556 | track->Global2LocalPosition(xyz, track->GetAlpha()); |
1557 | points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]); |
1bf51039 |
1558 | ip++; |
1559 | } |
1560 | |
1561 | return track->GetChi2(); |
1562 | } |
3b57a3f7 |
1563 | |
eb38ed55 |
1564 | //_________________________________________________________________________ |
bb56afff |
1565 | Float_t AliTRDtrackerV1::CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref) |
eb38ed55 |
1566 | { |
41702fec |
1567 | // |
1568 | // Calculates the chi2-value of the track in z-Direction including tilting pad correction. |
1569 | // A linear dependence on the x-value serves as a model. |
1570 | // The parameters are related to the tilted Riemann fit. |
1571 | // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate |
1572 | // - the offset for the reference x |
1573 | // - the slope |
1574 | // - the reference x position |
1575 | // Output: - The Chi2 value of the track in z-Direction |
1576 | // |
1577 | Float_t chi2Z = 0, nLayers = 0; |
053767a4 |
1578 | for (Int_t iLayer = 0; iLayer < AliTRDgeometry::kNlayer; iLayer++) { |
41702fec |
1579 | if(!tracklets[iLayer].IsOK()) continue; |
1580 | Double_t z = offset + slope * (tracklets[iLayer].GetX0() - xref); |
e3cf3d02 |
1581 | chi2Z += TMath::Abs(tracklets[iLayer].GetZfit(0) - z); |
41702fec |
1582 | nLayers++; |
1583 | } |
1584 | chi2Z /= TMath::Max((nLayers - 3.0),1.0); |
1585 | return chi2Z; |
eb38ed55 |
1586 | } |
1587 | |
bccda319 |
1588 | //_____________________________________________________________________________ |
1589 | Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep) |
1590 | { |
41702fec |
1591 | // |
1592 | // Starting from current X-position of track <t> this function |
1593 | // extrapolates the track up to radial position <xToGo>. |
1594 | // Returns 1 if track reaches the plane, and 0 otherwise |
1595 | // |
bccda319 |
1596 | |
41702fec |
1597 | const Double_t kEpsilon = 0.00001; |
bccda319 |
1598 | |
41702fec |
1599 | // Current track X-position |
1600 | Double_t xpos = t.GetX(); |
bccda319 |
1601 | |
41702fec |
1602 | // Direction: inward or outward |
1603 | Double_t dir = (xpos < xToGo) ? 1.0 : -1.0; |
bccda319 |
1604 | |
41702fec |
1605 | while (((xToGo - xpos) * dir) > kEpsilon) { |
bccda319 |
1606 | |
41702fec |
1607 | Double_t xyz0[3]; |
1608 | Double_t xyz1[3]; |
1609 | Double_t param[7]; |
1610 | Double_t x; |
1611 | Double_t y; |
1612 | Double_t z; |
bccda319 |
1613 | |
41702fec |
1614 | // The next step size |
1615 | Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep); |
bccda319 |
1616 | |
41702fec |
1617 | // Get the global position of the starting point |
1618 | t.GetXYZ(xyz0); |
bccda319 |
1619 | |
41702fec |
1620 | // X-position after next step |
1621 | x = xpos + step; |
bccda319 |
1622 | |
41702fec |
1623 | // Get local Y and Z at the X-position of the next step |
1624 | if (!t.GetProlongation(x,y,z)) { |
1625 | return 0; // No prolongation possible |
1626 | } |
bccda319 |
1627 | |
41702fec |
1628 | // The global position of the end point of this prolongation step |
1629 | xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha()); |
1630 | xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha()); |
1631 | xyz1[2] = z; |
bccda319 |
1632 | |
41702fec |
1633 | // Calculate the mean material budget between start and |
1634 | // end point of this prolongation step |
83dea92e |
1635 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return 0; |
bccda319 |
1636 | |
41702fec |
1637 | // Propagate the track to the X-position after the next step |
9c87a076 |
1638 | if (!t.PropagateTo(x, param[1], param[0]*param[4])) return 0; |
bccda319 |
1639 | |
41702fec |
1640 | // Rotate the track if necessary |
1641 | AdjustSector(&t); |
bccda319 |
1642 | |
41702fec |
1643 | // New track X-position |
1644 | xpos = t.GetX(); |
bccda319 |
1645 | |
41702fec |
1646 | } |
bccda319 |
1647 | |
41702fec |
1648 | return 1; |
bccda319 |
1649 | |
1650 | } |
1651 | |
eb38ed55 |
1652 | |
1653 | //_____________________________________________________________________________ |
1654 | Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) const |
1655 | { |
41702fec |
1656 | // |
1657 | // Reads AliTRDclusters from the file. |
1658 | // The names of the cluster tree and branches |
1659 | // should match the ones used in AliTRDclusterizer::WriteClusters() |
1660 | // |
1661 | |
1662 | Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster))); |
1663 | TObjArray *clusterArray = new TObjArray(nsize+1000); |
1664 | |
1665 | TBranch *branch = clusterTree->GetBranch("TRDcluster"); |
1666 | if (!branch) { |
1667 | AliError("Can't get the branch !"); |
1668 | return 1; |
1669 | } |
1670 | branch->SetAddress(&clusterArray); |
1671 | |
1672 | if(!fClusters){ |
8ae98148 |
1673 | Float_t nclusters = fReconstructor->GetRecoParam()->GetNClusters(); |
1674 | if(fReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; |
1675 | array = new TClonesArray("AliTRDcluster", Int_t(nclusters)); |
41702fec |
1676 | array->SetOwner(kTRUE); |
1677 | } |
1678 | |
1679 | // Loop through all entries in the tree |
1680 | Int_t nEntries = (Int_t) clusterTree->GetEntries(); |
1681 | Int_t nbytes = 0; |
1682 | Int_t ncl = 0; |
1683 | AliTRDcluster *c = 0x0; |
1684 | for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) { |
1685 | // Import the tree |
1686 | nbytes += clusterTree->GetEvent(iEntry); |
1687 | |
1688 | // Get the number of points in the detector |
1689 | Int_t nCluster = clusterArray->GetEntriesFast(); |
1690 | for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) { |
1691 | if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue; |
1692 | c->SetInChamber(); |
1693 | new((*fClusters)[ncl++]) AliTRDcluster(*c); |
1694 | delete (clusterArray->RemoveAt(iCluster)); |
1695 | } |
1696 | |
1697 | } |
1698 | delete clusterArray; |
1699 | |
1700 | return 0; |
eb38ed55 |
1701 | } |
1702 | |
1703 | //_____________________________________________________________________________ |
1704 | Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree) |
1705 | { |
41702fec |
1706 | // |
66f6bfd9 |
1707 | // Fills clusters into TRD tracking sectors |
41702fec |
1708 | // |
41702fec |
1709 | |
48f8adf3 |
1710 | if(!fReconstructor->IsWritingClusters()){ |
1711 | fClusters = AliTRDReconstructor::GetClusters(); |
1712 | } else { |
66f6bfd9 |
1713 | if (ReadClusters(fClusters, cTree)) { |
1714 | AliError("Problem with reading the clusters !"); |
1715 | return 1; |
1716 | } |
1717 | } |
1718 | SetClustersOwner(); |
1719 | |
48f8adf3 |
1720 | if(!fClusters || !fClusters->GetEntriesFast()){ |
66f6bfd9 |
1721 | AliInfo("No TRD clusters"); |
41702fec |
1722 | return 1; |
1723 | } |
66f6bfd9 |
1724 | |
1725 | //Int_t nin = |
1726 | BuildTrackingContainers(); |
1727 | |
1728 | //Int_t ncl = fClusters->GetEntriesFast(); |
1729 | //AliInfo(Form("Clusters %d [%6.2f %% in the active volume]", ncl, 100.*float(nin)/ncl)); |
1730 | |
1731 | return 0; |
1732 | } |
1733 | |
1734 | //_____________________________________________________________________________ |
1735 | Int_t AliTRDtrackerV1::LoadClusters(TClonesArray *clusters) |
1736 | { |
1737 | // |
1738 | // Fills clusters into TRD tracking sectors |
1739 | // Function for use in the HLT |
1740 | |
1741 | if(!clusters || !clusters->GetEntriesFast()){ |
1742 | AliInfo("No TRD clusters"); |
41702fec |
1743 | return 1; |
1744 | } |
1745 | |
66f6bfd9 |
1746 | fClusters = clusters; |
1747 | SetClustersOwner(); |
1748 | |
1749 | //Int_t nin = |
1750 | BuildTrackingContainers(); |
1751 | |
1752 | //Int_t ncl = fClusters->GetEntriesFast(); |
1753 | //AliInfo(Form("Clusters %d [%6.2f %% in the active volume]", ncl, 100.*float(nin)/ncl)); |
1754 | |
1755 | return 0; |
1756 | } |
1757 | |
1758 | |
1759 | //____________________________________________________________________ |
1760 | Int_t AliTRDtrackerV1::BuildTrackingContainers() |
1761 | { |
1762 | // Building tracking containers for clusters |
1763 | |
1764 | Int_t nin =0, icl = fClusters->GetEntriesFast(); |
41702fec |
1765 | while (icl--) { |
1766 | AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(icl); |
1767 | if(c->IsInChamber()) nin++; |
1768 | Int_t detector = c->GetDetector(); |
1769 | Int_t sector = fGeom->GetSector(detector); |
053767a4 |
1770 | Int_t stack = fGeom->GetStack(detector); |
1771 | Int_t layer = fGeom->GetLayer(detector); |
41702fec |
1772 | |
053767a4 |
1773 | fTrSec[sector].GetChamber(stack, layer, kTRUE)->InsertCluster(c, icl); |
41702fec |
1774 | } |
b0a48c4d |
1775 | |
1776 | const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); |
053767a4 |
1777 | for(int isector =0; isector<AliTRDgeometry::kNsector; isector++){ |
41702fec |
1778 | if(!fTrSec[isector].GetNChambers()) continue; |
b0a48c4d |
1779 | fTrSec[isector].Init(fReconstructor, cal); |
41702fec |
1780 | } |
66f6bfd9 |
1781 | |
1782 | return nin; |
eb38ed55 |
1783 | } |
1784 | |
1785 | |
66f6bfd9 |
1786 | |
0906e73e |
1787 | //____________________________________________________________________ |
1788 | void AliTRDtrackerV1::UnloadClusters() |
1789 | { |
41702fec |
1790 | // |
1791 | // Clears the arrays of clusters and tracks. Resets sectors and timebins |
1792 | // |
0906e73e |
1793 | |
41702fec |
1794 | if(fTracks) fTracks->Delete(); |
1795 | if(fTracklets) fTracklets->Delete(); |
48f8adf3 |
1796 | if(fClusters){ |
1797 | if(IsClustersOwner()) fClusters->Delete(); |
1798 | |
1799 | // save clusters array in the reconstructor for further use. |
1800 | if(!fReconstructor->IsWritingClusters()){ |
1801 | AliTRDReconstructor::SetClusters(fClusters); |
1802 | SetClustersOwner(kFALSE); |
1803 | } else AliTRDReconstructor::SetClusters(0x0); |
1804 | } |
0906e73e |
1805 | |
053767a4 |
1806 | for (int i = 0; i < AliTRDgeometry::kNsector; i++) fTrSec[i].Clear(); |
0906e73e |
1807 | |
41702fec |
1808 | // Increment the Event Number |
1809 | AliTRDtrackerDebug::SetEventNumber(AliTRDtrackerDebug::GetEventNumber() + 1); |
eb38ed55 |
1810 | } |
0906e73e |
1811 | |
fac58f00 |
1812 | // //____________________________________________________________________ |
1813 | // void AliTRDtrackerV1::UseClusters(const AliKalmanTrack *t, Int_t) const |
1814 | // { |
1815 | // const AliTRDtrackV1 *track = dynamic_cast<const AliTRDtrackV1*>(t); |
1816 | // if(!track) return; |
1817 | // |
1818 | // AliTRDseedV1 *tracklet = 0x0; |
1819 | // for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){ |
1820 | // if(!(tracklet = track->GetTracklet(ily))) continue; |
1821 | // AliTRDcluster *c = 0x0; |
8d2bec9e |
1822 | // for(Int_t ic=AliTRDseed::kNclusters; ic--;){ |
fac58f00 |
1823 | // if(!(c=tracklet->GetClusters(ic))) continue; |
1824 | // c->Use(); |
1825 | // } |
1826 | // } |
1827 | // } |
1828 | // |
b1957d3c |
1829 | |
eb38ed55 |
1830 | //_____________________________________________________________________________ |
1831 | Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track) |
1832 | { |
41702fec |
1833 | // |
1834 | // Rotates the track when necessary |
1835 | // |
1836 | |
1837 | Double_t alpha = AliTRDgeometry::GetAlpha(); |
1838 | Double_t y = track->GetY(); |
1839 | Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha); |
3cfaffa4 |
1840 | |
41702fec |
1841 | if (y > ymax) { |
1842 | if (!track->Rotate( alpha)) { |
1843 | return kFALSE; |
1844 | } |
1845 | } |
1846 | else if (y < -ymax) { |
1847 | if (!track->Rotate(-alpha)) { |
1848 | return kFALSE; |
1849 | } |
1850 | } |
1851 | |
1852 | return kTRUE; |
0906e73e |
1853 | |
1854 | } |
1855 | |
eb38ed55 |
1856 | |
0906e73e |
1857 | //____________________________________________________________________ |
1858 | AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *track, Int_t p, Int_t &idx) |
1859 | { |
41702fec |
1860 | // Find tracklet for TRD track <track> |
1861 | // Parameters |
1862 | // - track |
1863 | // - sector |
1864 | // - plane |
1865 | // - index |
1866 | // Output |
1867 | // tracklet |
1868 | // index |
1869 | // Detailed description |
1870 | // |
1871 | idx = track->GetTrackletIndex(p); |
1872 | AliTRDseedV1 *tracklet = (idx==0xffff) ? 0x0 : (AliTRDseedV1*)fTracklets->UncheckedAt(idx); |
1873 | |
1874 | return tracklet; |
0906e73e |
1875 | } |
1876 | |
1877 | //____________________________________________________________________ |
3b57a3f7 |
1878 | AliTRDseedV1* AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet) |
0906e73e |
1879 | { |
41702fec |
1880 | // Add this tracklet to the list of tracklets stored in the tracker |
1881 | // |
1882 | // Parameters |
1883 | // - tracklet : pointer to the tracklet to be added to the list |
1884 | // |
1885 | // Output |
1886 | // - the index of the new tracklet in the tracker tracklets list |
1887 | // |
1888 | // Detailed description |
1889 | // Build the tracklets list if it is not yet created (late initialization) |
1890 | // and adds the new tracklet to the list. |
1891 | // |
1892 | if(!fTracklets){ |
053767a4 |
1893 | fTracklets = new TClonesArray("AliTRDseedV1", AliTRDgeometry::Nsector()*kMaxTracksStack); |
41702fec |
1894 | fTracklets->SetOwner(kTRUE); |
1895 | } |
1896 | Int_t nentries = fTracklets->GetEntriesFast(); |
1897 | return new ((*fTracklets)[nentries]) AliTRDseedV1(*tracklet); |
972ef65e |
1898 | } |
1899 | |
d20df6fc |
1900 | //____________________________________________________________________ |
1901 | AliTRDtrackV1* AliTRDtrackerV1::SetTrack(AliTRDtrackV1 *track) |
1902 | { |
1903 | // Add this track to the list of tracks stored in the tracker |
1904 | // |
1905 | // Parameters |
1906 | // - track : pointer to the track to be added to the list |
1907 | // |
1908 | // Output |
1909 | // - the pointer added |
1910 | // |
1911 | // Detailed description |
1912 | // Build the tracks list if it is not yet created (late initialization) |
1913 | // and adds the new track to the list. |
1914 | // |
1915 | if(!fTracks){ |
053767a4 |
1916 | fTracks = new TClonesArray("AliTRDtrackV1", AliTRDgeometry::Nsector()*kMaxTracksStack); |
d20df6fc |
1917 | fTracks->SetOwner(kTRUE); |
1918 | } |
1919 | Int_t nentries = fTracks->GetEntriesFast(); |
1920 | return new ((*fTracks)[nentries]) AliTRDtrackV1(*track); |
1921 | } |
1922 | |
1923 | |
0906e73e |
1924 | |
e4f2f73d |
1925 | //____________________________________________________________________ |
eb38ed55 |
1926 | Int_t AliTRDtrackerV1::Clusters2TracksSM(Int_t sector, AliESDEvent *esd) |
e4f2f73d |
1927 | { |
41702fec |
1928 | // |
1929 | // Steer tracking for one SM. |
1930 | // |
1931 | // Parameters : |
1932 | // sector : Array of (SM) propagation layers containing clusters |
1933 | // esd : The current ESD event. On output it contains the also |
1934 | // the ESD (TRD) tracks found in this SM. |
1935 | // |
1936 | // Output : |
1937 | // Number of tracks found in this TRD supermodule. |
1938 | // |
1939 | // Detailed description |
1940 | // |
1941 | // 1. Unpack AliTRDpropagationLayers objects for each stack. |
1942 | // 2. Launch stack tracking. |
1943 | // See AliTRDtrackerV1::Clusters2TracksStack() for details. |
1944 | // 3. Pack results in the ESD event. |
1945 | // |
1946 | |
1947 | // allocate space for esd tracks in this SM |
1948 | TClonesArray esdTrackList("AliESDtrack", 2*kMaxTracksStack); |
1949 | esdTrackList.SetOwner(); |
1950 | |
1951 | Int_t nTracks = 0; |
1952 | Int_t nChambers = 0; |
1953 | AliTRDtrackingChamber **stack = 0x0, *chamber = 0x0; |
053767a4 |
1954 | for(int istack = 0; istack<AliTRDgeometry::kNstack; istack++){ |
41702fec |
1955 | if(!(stack = fTrSec[sector].GetStack(istack))) continue; |
1956 | nChambers = 0; |
053767a4 |
1957 | for(int ilayer=0; ilayer<AliTRDgeometry::kNlayer; ilayer++){ |
1958 | if(!(chamber = stack[ilayer])) continue; |
3a039a31 |
1959 | if(chamber->GetNClusters() < fgNTimeBins * fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; |
41702fec |
1960 | nChambers++; |
053767a4 |
1961 | //AliInfo(Form("sector %d stack %d layer %d clusters %d", sector, istack, ilayer, chamber->GetNClusters())); |
41702fec |
1962 | } |
1963 | if(nChambers < 4) continue; |
1964 | //AliInfo(Form("Doing stack %d", istack)); |
1965 | nTracks += Clusters2TracksStack(stack, &esdTrackList); |
1966 | } |
1967 | //AliInfo(Form("Found %d tracks in SM %d [%d]\n", nTracks, sector, esd->GetNumberOfTracks())); |
1968 | |
1969 | for(int itrack=0; itrack<nTracks; itrack++) |
1970 | esd->AddTrack((AliESDtrack*)esdTrackList[itrack]); |
1971 | |
1972 | // Reset Track and Candidate Number |
1973 | AliTRDtrackerDebug::SetCandidateNumber(0); |
1974 | AliTRDtrackerDebug::SetTrackNumber(0); |
1975 | return nTracks; |
e4f2f73d |
1976 | } |
1977 | |
1978 | //____________________________________________________________________ |
eb38ed55 |
1979 | Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList) |
e4f2f73d |
1980 | { |
41702fec |
1981 | // |
1982 | // Make tracks in one TRD stack. |
1983 | // |
1984 | // Parameters : |
1985 | // layer : Array of stack propagation layers containing clusters |
1986 | // esdTrackList : Array of ESD tracks found by the stand alone tracker. |
1987 | // On exit the tracks found in this stack are appended. |
1988 | // |
1989 | // Output : |
1990 | // Number of tracks found in this stack. |
1991 | // |
1992 | // Detailed description |
1993 | // |
1994 | // 1. Find the 3 most useful seeding chambers. See BuildSeedingConfigs() for details. |
1995 | // 2. Steer AliTRDtrackerV1::MakeSeeds() for 3 seeding layer configurations. |
1996 | // See AliTRDtrackerV1::MakeSeeds() for more details. |
1997 | // 3. Arrange track candidates in decreasing order of their quality |
1998 | // 4. Classify tracks in 5 categories according to: |
1999 | // a) number of layers crossed |
2000 | // b) track quality |
2001 | // 5. Sign clusters by tracks in decreasing order of track quality |
2002 | // 6. Build AliTRDtrack out of seeding tracklets |
2003 | // 7. Cook MC label |
2004 | // 8. Build ESD track and register it to the output list |
2005 | // |
2006 | |
b0a48c4d |
2007 | const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); |
41702fec |
2008 | AliTRDtrackingChamber *chamber = 0x0; |
fac58f00 |
2009 | AliTRDtrackingChamber **ci = 0x0; |
41702fec |
2010 | AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized |
2011 | Int_t pars[4]; // MakeSeeds parameters |
2012 | |
2013 | //Double_t alpha = AliTRDgeometry::GetAlpha(); |
2014 | //Double_t shift = .5 * alpha; |
2015 | Int_t configs[kNConfigs]; |
2016 | |
fac58f00 |
2017 | // Purge used clusters from the containers |
2018 | ci = &stack[0]; |
2019 | for(Int_t ic = kNPlanes; ic--; ci++){ |
2020 | if(!(*ci)) continue; |
2021 | (*ci)->Update(); |
2022 | } |
2023 | |
41702fec |
2024 | // Build initial seeding configurations |
2025 | Double_t quality = BuildSeedingConfigs(stack, configs); |
eb2b4f91 |
2026 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ |
41702fec |
2027 | AliInfo(Form("Plane config %d %d %d Quality %f" |
2028 | , configs[0], configs[1], configs[2], quality)); |
2029 | } |
d931f2aa |
2030 | |
41702fec |
2031 | |
2032 | // Initialize contors |
2033 | Int_t ntracks, // number of TRD track candidates |
2034 | ntracks1, // number of registered TRD tracks/iter |
2035 | ntracks2 = 0; // number of all registered TRD tracks in stack |
2036 | fSieveSeeding = 0; |
d931f2aa |
2037 | |
2038 | // Get stack index |
fac58f00 |
2039 | Int_t ic = 0; ci = &stack[0]; |
2040 | while(ic<kNPlanes && !(*ci)){ic++; ci++;} |
2041 | if(!(*ci)) return ntracks2; |
2042 | Int_t istack = fGeom->GetStack((*ci)->GetDetector()); |
d931f2aa |
2043 | |
41702fec |
2044 | do{ |
2045 | // Loop over seeding configurations |
2046 | ntracks = 0; ntracks1 = 0; |
2047 | for (Int_t iconf = 0; iconf<3; iconf++) { |
2048 | pars[0] = configs[iconf]; |
2049 | pars[1] = ntracks; |
d931f2aa |
2050 | pars[2] = istack; |
41702fec |
2051 | ntracks = MakeSeeds(stack, &sseed[6*ntracks], pars); |
2052 | if(ntracks == kMaxTracksStack) break; |
2053 | } |
eb2b4f91 |
2054 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10) AliInfo(Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding)); |
41702fec |
2055 | |
2056 | if(!ntracks) break; |
2057 | |
2058 | // Sort the seeds according to their quality |
2059 | Int_t sort[kMaxTracksStack]; |
2060 | TMath::Sort(ntracks, fTrackQuality, sort, kTRUE); |
2061 | |
2062 | // Initialize number of tracks so far and logic switches |
2063 | Int_t ntracks0 = esdTrackList->GetEntriesFast(); |
2064 | Bool_t signedTrack[kMaxTracksStack]; |
2065 | Bool_t fakeTrack[kMaxTracksStack]; |
2066 | for (Int_t i=0; i<ntracks; i++){ |
2067 | signedTrack[i] = kFALSE; |
2068 | fakeTrack[i] = kFALSE; |
2069 | } |
2070 | //AliInfo("Selecting track candidates ..."); |
2071 | |
2072 | // Sieve clusters in decreasing order of track quality |
2073 | Double_t trackParams[7]; |
2074 | // AliTRDseedV1 *lseed = 0x0; |
2075 | Int_t jSieve = 0, candidates; |
2076 | do{ |
2077 | //AliInfo(Form("\t\tITER = %i ", jSieve)); |
2078 | |
2079 | // Check track candidates |
2080 | candidates = 0; |
2081 | for (Int_t itrack = 0; itrack < ntracks; itrack++) { |
804bb02e |
2082 | Int_t trackIndex = sort[itrack]; |
2083 | if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue; |
41702fec |
2084 | |
2085 | |
804bb02e |
2086 | // Calculate track parameters from tracklets seeds |
804bb02e |
2087 | Int_t ncl = 0; |
2088 | Int_t nused = 0; |
2089 | Int_t nlayers = 0; |
2090 | Int_t findable = 0; |
2091 | for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) { |
2092 | Int_t jseed = kNPlanes*trackIndex+jLayer; |
2093 | if(!sseed[jseed].IsOK()) continue; |
f29f13a6 |
2094 | if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.158) findable++; |
eede7907 |
2095 | // TODO here we get a sig fault which should never happen ! |
804bb02e |
2096 | sseed[jseed].UpdateUsed(); |
2097 | ncl += sseed[jseed].GetN2(); |
2098 | nused += sseed[jseed].GetNUsed(); |
2099 | nlayers++; |
804bb02e |
2100 | } |
2101 | |
f29f13a6 |
2102 | // Filter duplicated tracks |
2103 | if (nused > 30){ |
2104 | //printf("Skip %d nused %d\n", trackIndex, nused); |
2105 | fakeTrack[trackIndex] = kTRUE; |
2106 | continue; |
2107 | } |
2108 | if (Float_t(nused)/ncl >= .25){ |
2109 | //printf("Skip %d nused/ncl >= .25\n", trackIndex); |
2110 | fakeTrack[trackIndex] = kTRUE; |
2111 | continue; |
2112 | } |
41702fec |
2113 | |
f29f13a6 |
2114 | // Classify tracks |
2115 | Bool_t skip = kFALSE; |
2116 | switch(jSieve){ |
2117 | case 0: |
2118 | if(nlayers < 6) {skip = kTRUE; break;} |
2119 | if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} |
2120 | break; |
2121 | |
2122 | case 1: |
2123 | if(nlayers < findable){skip = kTRUE; break;} |
2124 | if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;} |
2125 | break; |
2126 | |
2127 | case 2: |
2128 | if ((nlayers == findable) || (nlayers == 6)) { skip = kTRUE; break;} |
2129 | if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;} |
2130 | break; |
2131 | |
2132 | case 3: |
2133 | if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} |
2134 | break; |
2135 | |
2136 | case 4: |
2137 | if (nlayers == 3){skip = kTRUE; break;} |
2138 | //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;} |
2139 | break; |
2140 | } |
2141 | if(skip){ |
2142 | candidates++; |
2143 | //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused); |
2144 | continue; |
2145 | } |
2146 | signedTrack[trackIndex] = kTRUE; |
2147 | |
2148 | // Build track parameters |
2149 | AliTRDseedV1 *lseed =&sseed[trackIndex*6]; |
2150 | /* Int_t idx = 0; |
2151 | while(idx<3 && !lseed->IsOK()) { |
2152 | idx++; |
2153 | lseed++; |
2154 | }*/ |
2155 | Double_t x = lseed->GetX0();// - 3.5; |
2156 | trackParams[0] = x; //NEW AB |
2157 | trackParams[1] = lseed->GetYref(0); // lseed->GetYat(x); |
2158 | trackParams[2] = lseed->GetZref(0); // lseed->GetZat(x); |
2159 | trackParams[3] = TMath::Sin(TMath::ATan(lseed->GetYref(1))); |
2160 | trackParams[4] = lseed->GetZref(1) / TMath::Sqrt(1. + lseed->GetYref(1) * lseed->GetYref(1)); |
2161 | trackParams[5] = lseed->GetC(); |
2162 | Int_t ich = 0; while(!(chamber = stack[ich])) ich++; |
2163 | trackParams[6] = fGeom->GetSector(chamber->GetDetector());/* *alpha+shift; // Supermodule*/ |
2164 | |
2165 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
eb2b4f91 |
2166 | //AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1])); |
f29f13a6 |
2167 | |
f29f13a6 |
2168 | AliTRDseedV1 *dseed[6]; |
b82b4de1 |
2169 | for(Int_t iseed = AliTRDgeometry::kNlayer; iseed--;) dseed[iseed] = new AliTRDseedV1(lseed[iseed]); |
f29f13a6 |
2170 | |
2171 | //Int_t eventNrInFile = esd->GetEventNumberInFile(); |
2172 | //AliInfo(Form("Number of clusters %d.", nclusters)); |
2173 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2174 | Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber(); |
2175 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2176 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
2177 | cstreamer << "Clusters2TracksStack" |
2178 | << "EventNumber=" << eventNumber |
2179 | << "TrackNumber=" << trackNumber |
2180 | << "CandidateNumber=" << candidateNumber |
2181 | << "Iter=" << fSieveSeeding |
2182 | << "Like=" << fTrackQuality[trackIndex] |
2183 | << "S0.=" << dseed[0] |
2184 | << "S1.=" << dseed[1] |
2185 | << "S2.=" << dseed[2] |
2186 | << "S3.=" << dseed[3] |
2187 | << "S4.=" << dseed[4] |
2188 | << "S5.=" << dseed[5] |
2189 | << "p0=" << trackParams[0] |
2190 | << "p1=" << trackParams[1] |
2191 | << "p2=" << trackParams[2] |
2192 | << "p3=" << trackParams[3] |
2193 | << "p4=" << trackParams[4] |
2194 | << "p5=" << trackParams[5] |
2195 | << "p6=" << trackParams[6] |
f29f13a6 |
2196 | << "Ncl=" << ncl |
2197 | << "NLayers=" << nlayers |
2198 | << "Findable=" << findable |
2199 | << "NUsed=" << nused |
2200 | << "\n"; |
2201 | } |
d877f55f |
2202 | |
f29f13a6 |
2203 | AliTRDtrackV1 *track = MakeTrack(&sseed[trackIndex*kNPlanes], trackParams); |
2204 | if(!track){ |
2205 | AliWarning("Fail to build a TRD Track."); |
2206 | continue; |
d877f55f |
2207 | } |
41702fec |
2208 | |
f29f13a6 |
2209 | //AliInfo("End of MakeTrack()"); |
2210 | AliESDtrack *esdTrack = new ((*esdTrackList)[ntracks0++]) AliESDtrack(); |
2211 | esdTrack->UpdateTrackParams(track, AliESDtrack::kTRDout); |
2212 | esdTrack->SetLabel(track->GetLabel()); |
2213 | track->UpdateESDtrack(esdTrack); |
2214 | // write ESD-friends if neccessary |
2215 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
2216 | AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track); |
2217 | calibTrack->SetOwner(); |
2218 | esdTrack->AddCalibObject(calibTrack); |
2219 | } |
2220 | ntracks1++; |
2221 | AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1); |
41702fec |
2222 | } |
2223 | |
2224 | jSieve++; |
2225 | } while(jSieve<5 && candidates); // end track candidates sieve |
2226 | if(!ntracks1) break; |
2227 | |
2228 | // increment counters |
2229 | ntracks2 += ntracks1; |
4302c900 |
2230 | |
2231 | if(fReconstructor->IsHLT()) break; |
41702fec |
2232 | fSieveSeeding++; |
2233 | |
2234 | // Rebuild plane configurations and indices taking only unused clusters into account |
2235 | quality = BuildSeedingConfigs(stack, configs); |
3a039a31 |
2236 | if(quality < 1.E-7) break; //fReconstructor->GetRecoParam() ->GetPlaneQualityThreshold()) break; |
41702fec |
2237 | |
2238 | for(Int_t ip = 0; ip < kNPlanes; ip++){ |
2239 | if(!(chamber = stack[ip])) continue; |
b0a48c4d |
2240 | chamber->Build(fGeom, cal);//Indices(fSieveSeeding); |
41702fec |
2241 | } |
2242 | |
eb2b4f91 |
2243 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ |
41702fec |
2244 | AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality)); |
2245 | } |
2246 | } while(fSieveSeeding<10); // end stack clusters sieve |
2247 | |
2248 | |
2249 | |
2250 | //AliInfo(Form("Registered TRD tracks %d in stack %d.", ntracks2, pars[1])); |
2251 | |
2252 | return ntracks2; |
e4f2f73d |
2253 | } |
2254 | |
2255 | //___________________________________________________________________ |
eb38ed55 |
2256 | Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs) |
e4f2f73d |
2257 | { |
41702fec |
2258 | // |
2259 | // Assign probabilities to chambers according to their |
2260 | // capability of producing seeds. |
2261 | // |
2262 | // Parameters : |
2263 | // |
2264 | // layers : Array of stack propagation layers for all 6 chambers in one stack |
2265 | // configs : On exit array of configuration indexes (see GetSeedingConfig() |
2266 | // for details) in the decreasing order of their seeding probabilities. |
2267 | // |
2268 | // Output : |
2269 | // |
2270 | // Return top configuration quality |
2271 | // |
2272 | // Detailed description: |
2273 | // |
2274 | // To each chamber seeding configuration (see GetSeedingConfig() for |
2275 | // the list of all configurations) one defines 2 quality factors: |
2276 | // - an apriori topological quality (see GetSeedingConfig() for details) and |
2277 | // - a data quality based on the uniformity of the distribution of |
2278 | // clusters over the x range (time bins population). See CookChamberQA() for details. |
2279 | // The overall chamber quality is given by the product of this 2 contributions. |
2280 | // |
2281 | |
eb2b4f91 |
2282 | Double_t chamberQ[kNPlanes];memset(chamberQ, 0, kNPlanes*sizeof(Double_t)); |
41702fec |
2283 | AliTRDtrackingChamber *chamber = 0x0; |
2284 | for(int iplane=0; iplane<kNPlanes; iplane++){ |
2285 | if(!(chamber = stack[iplane])) continue; |
2286 | chamberQ[iplane] = (chamber = stack[iplane]) ? chamber->GetQuality() : 0.; |
2287 | } |
2288 | |
eb2b4f91 |
2289 | Double_t tconfig[kNConfigs];memset(tconfig, 0, kNConfigs*sizeof(Double_t)); |
2290 | Int_t planes[] = {0, 0, 0, 0}; |
41702fec |
2291 | for(int iconf=0; iconf<kNConfigs; iconf++){ |
2292 | GetSeedingConfig(iconf, planes); |
2293 | tconfig[iconf] = fgTopologicQA[iconf]; |
2294 | for(int iplane=0; iplane<4; iplane++) tconfig[iconf] *= chamberQ[planes[iplane]]; |
2295 | } |
2296 | |
2297 | TMath::Sort((Int_t)kNConfigs, tconfig, configs, kTRUE); |
2298 | // AliInfo(Form("q[%d] = %f", configs[0], tconfig[configs[0]])); |
2299 | // AliInfo(Form("q[%d] = %f", configs[1], tconfig[configs[1]])); |
2300 | // AliInfo(Form("q[%d] = %f", configs[2], tconfig[configs[2]])); |
2301 | |
2302 | return tconfig[configs[0]]; |
e4f2f73d |
2303 | } |
2304 | |
2305 | //____________________________________________________________________ |
eb38ed55 |
2306 | Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar) |
e4f2f73d |
2307 | { |
41702fec |
2308 | // |
2309 | // Make tracklet seeds in the TRD stack. |
2310 | // |
2311 | // Parameters : |
2312 | // layers : Array of stack propagation layers containing clusters |
2313 | // sseed : Array of empty tracklet seeds. On exit they are filled. |
2314 | // ipar : Control parameters: |
2315 | // ipar[0] -> seeding chambers configuration |
2316 | // ipar[1] -> stack index |
2317 | // ipar[2] -> number of track candidates found so far |
2318 | // |
2319 | // Output : |
2320 | // Number of tracks candidates found. |
2321 | // |
2322 | // Detailed description |
2323 | // |
2324 | // The following steps are performed: |
2325 | // 1. Select seeding layers from seeding chambers |
2326 | // 2. Select seeding clusters from the seeding AliTRDpropagationLayerStack. |
2327 | // The clusters are taken from layer 3, layer 0, layer 1 and layer 2, in |
2328 | // this order. The parameters controling the range of accepted clusters in |
2329 | // layer 0, 1, and 2 are defined in AliTRDchamberTimeBin::BuildCond(). |
2330 | // 3. Helix fit of the cluster set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**)) |
2331 | // 4. Initialize seeding tracklets in the seeding chambers. |
2332 | // 5. Filter 0. |
2333 | // Chi2 in the Y direction less than threshold ... (1./(3. - sLayer)) |
2334 | // Chi2 in the Z direction less than threshold ... (1./(3. - sLayer)) |
2335 | // 6. Attach clusters to seeding tracklets and find linear approximation of |
2336 | // the tracklet (see AliTRDseedV1::AttachClustersIter()). The number of used |
2337 | // clusters used by current seeds should not exceed ... (25). |
2338 | // 7. Filter 1. |
2339 | // All 4 seeding tracklets should be correctly constructed (see |
2340 | // AliTRDseedV1::AttachClustersIter()) |
2341 | // 8. Helix fit of the seeding tracklets |
2342 | // 9. Filter 2. |
2343 | // Likelihood calculation of the fit. (See AliTRDtrackerV1::CookLikelihood() for details) |
2344 | // 10. Extrapolation of the helix fit to the other 2 chambers: |
2345 | // a) Initialization of extrapolation tracklet with fit parameters |
2346 | // b) Helix fit of tracklets |
2347 | // c) Attach clusters and linear interpolation to extrapolated tracklets |
2348 | // d) Helix fit of tracklets |
2349 | // 11. Improve seeding tracklets quality by reassigning clusters. |
2350 | // See AliTRDtrackerV1::ImproveSeedQuality() for details. |
2351 | // 12. Helix fit of all 6 seeding tracklets and chi2 calculation |
2352 | // 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details. |
2353 | // 14. Cooking labels for tracklets. Should be done only for MC |
2354 | // 15. Register seeds. |
2355 | // |
2356 | |
2357 | AliTRDtrackingChamber *chamber = 0x0; |
be24510a |
2358 | AliTRDcluster *c[kNSeedPlanes] = {0x0, 0x0, 0x0, 0x0}; // initilize seeding clusters |
41702fec |
2359 | AliTRDseedV1 *cseed = &sseed[0]; // initialize tracklets for first track |
2360 | Int_t ncl, mcl; // working variable for looping over clusters |
2361 | Int_t index[AliTRDchamberTimeBin::kMaxClustersLayer], jndex[AliTRDchamberTimeBin::kMaxClustersLayer]; |
2362 | // chi2 storage |
2363 | // chi2[0] = tracklet chi2 on the Z direction |
2364 | // chi2[1] = tracklet chi2 on the R direction |
2365 | Double_t chi2[4]; |
2366 | |
41702fec |
2367 | // this should be data member of AliTRDtrack |
2368 | Double_t seedQuality[kMaxTracksStack]; |
2369 | |
2370 | // unpack control parameters |
2371 | Int_t config = ipar[0]; |
2372 | Int_t ntracks = ipar[1]; |
d931f2aa |
2373 | Int_t istack = ipar[2]; |
41702fec |
2374 | Int_t planes[kNSeedPlanes]; GetSeedingConfig(config, planes); |
be24510a |
2375 | Int_t planesExt[kNPlanes-kNSeedPlanes]; GetExtrapolationConfig(config, planesExt); |
2376 | |
2377 | |
41702fec |
2378 | // Init chambers geometry |
41702fec |
2379 | Double_t hL[kNPlanes]; // Tilting angle |
2380 | Float_t padlength[kNPlanes]; // pad lenghts |
dd8059a8 |
2381 | Float_t padwidth[kNPlanes]; // pad widths |
41702fec |
2382 | AliTRDpadPlane *pp = 0x0; |
2383 | for(int iplane=0; iplane<kNPlanes; iplane++){ |
2384 | pp = fGeom->GetPadPlane(iplane, istack); |
bb79ccd5 |
2385 | hL[iplane] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle()); |
41702fec |
2386 | padlength[iplane] = pp->GetLengthIPad(); |
dd8059a8 |
2387 | padwidth[iplane] = pp->GetWidthIPad(); |
41702fec |
2388 | } |
2389 | |
eb2b4f91 |
2390 | // Init anode wire position for chambers |
eede7907 |
2391 | Double_t x0[kNPlanes] = {300.2, 312.8, 325.4, 338.0, 350.6, 363.2}, // anode wire position |
eb2b4f91 |
2392 | driftLength = .5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); // drift length |
2393 | TGeoHMatrix *matrix = 0x0; |
2394 | Double_t loc[] = {AliTRDgeometry::AnodePos(), 0., 0.}; |
2395 | Double_t glb[] = {0., 0., 0.}; |
2396 | AliTRDtrackingChamber **cIter = &stack[0]; |
2397 | for(int iLayer=kNPlanes; iLayer--; cIter++){ |
2398 | if(!(*cIter)) continue; |
2399 | if(!(matrix = fGeom->GetClusterMatrix((*cIter)->GetDetector()))) continue; |
2400 | matrix->LocalToMaster(loc, glb); |
2401 | x0[iLayer] = glb[0]; |
2402 | } |
2403 | |
2404 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ |
41702fec |
2405 | AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks)); |
2406 | } |
2407 | |
d931f2aa |
2408 | // Build seeding layers |
d611c74f |
2409 | ResetSeedTB(); |
41702fec |
2410 | Int_t nlayers = 0; |
41702fec |
2411 | for(int isl=0; isl<kNSeedPlanes; isl++){ |
2412 | if(!(chamber = stack[planes[isl]])) continue; |
3a039a31 |
2413 | if(!chamber->GetSeedingLayer(fSeedTB[isl], fGeom, fReconstructor)) continue; |
41702fec |
2414 | nlayers++; |
41702fec |
2415 | } |
eb2b4f91 |
2416 | if(nlayers < kNSeedPlanes) return ntracks; |
41702fec |
2417 | |
2418 | |
2419 | // Start finding seeds |
2420 | Double_t cond0[4], cond1[4], cond2[4]; |
2421 | Int_t icl = 0; |
d611c74f |
2422 | while((c[3] = (*fSeedTB[3])[icl++])){ |
41702fec |
2423 | if(!c[3]) continue; |
d611c74f |
2424 | fSeedTB[0]->BuildCond(c[3], cond0, 0); |
2425 | fSeedTB[0]->GetClusters(cond0, index, ncl); |
41702fec |
2426 | //printf("Found c[3] candidates 0 %d\n", ncl); |
2427 | Int_t jcl = 0; |
2428 | while(jcl<ncl) { |
d611c74f |
2429 | c[0] = (*fSeedTB[0])[index[jcl++]]; |
41702fec |
2430 | if(!c[0]) continue; |
2431 | Double_t dx = c[3]->GetX() - c[0]->GetX(); |
2432 | Double_t theta = (c[3]->GetZ() - c[0]->GetZ())/dx; |
2433 | Double_t phi = (c[3]->GetY() - c[0]->GetY())/dx; |
d611c74f |
2434 | fSeedTB[1]->BuildCond(c[0], cond1, 1, theta, phi); |
2435 | fSeedTB[1]->GetClusters(cond1, jndex, mcl); |
41702fec |
2436 | //printf("Found c[0] candidates 1 %d\n", mcl); |
2437 | |
2438 | Int_t kcl = 0; |
2439 | while(kcl<mcl) { |
d611c74f |
2440 | c[1] = (*fSeedTB[1])[jndex[kcl++]]; |
2441 | if(!c[1]) continue; |
2442 | fSeedTB[2]->BuildCond(c[1], cond2, 2, theta, phi); |
2443 | c[2] = fSeedTB[2]->GetNearestCluster(cond2); |
2444 | //printf("Found c[1] candidate 2 %p\n", c[2]); |
2445 | if(!c[2]) continue; |
2446 | |
2447 | // AliInfo("Seeding clusters found. Building seeds ..."); |
2448 | // 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()); |
2449 | |
804bb02e |
2450 | for (Int_t il = 0; il < kNPlanes; il++) cseed[il].Reset(); |
41702fec |
2451 | |
d611c74f |
2452 | FitRieman(c, chi2); |
2453 | |
d931f2aa |
2454 | AliTRDseedV1 *tseed = &cseed[0]; |
bb2db46c |
2455 | cIter = &stack[0]; |
2456 | for(int iLayer=0; iLayer<kNPlanes; iLayer++, tseed++, cIter++){ |
2457 | Int_t det = (*cIter) ? (*cIter)->GetDetector() : -1; |
eb2b4f91 |
2458 | tseed->SetDetector(det); |
43d6ad34 |
2459 | tseed->SetTilt(hL[iLayer]); |
2460 | tseed->SetPadLength(padlength[iLayer]); |
dd8059a8 |
2461 | tseed->SetPadWidth(padwidth[iLayer]); |
3a039a31 |
2462 | tseed->SetReconstructor(fReconstructor); |
eb2b4f91 |
2463 | tseed->SetX0(det<0 ? fR[iLayer]+driftLength : x0[iLayer]); |
d611c74f |
2464 | tseed->Init(GetRiemanFitter()); |
f29f13a6 |
2465 | tseed->SetStandAlone(kTRUE); |
d611c74f |
2466 | } |
2467 | |
2468 | Bool_t isFake = kFALSE; |
3a039a31 |
2469 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
d611c74f |
2470 | if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2471 | if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2472 | if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2473 | |
2474 | Double_t xpos[4]; |
2475 | for(Int_t l = 0; l < kNSeedPlanes; l++) xpos[l] = fSeedTB[l]->GetX(); |
2476 | Float_t yref[4]; |
2477 | for(int il=0; il<4; il++) yref[il] = cseed[planes[il]].GetYref(0); |
2478 | Int_t ll = c[3]->GetLabel(0); |
2479 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2480 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2481 | AliRieman *rim = GetRiemanFitter(); |
29f95561 |
2482 | TTreeSRedirector &cs0 = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f |
2483 | cs0 << "MakeSeeds0" |
2484 | <<"EventNumber=" << eventNumber |
2485 | <<"CandidateNumber=" << candidateNumber |
2486 | <<"isFake=" << isFake |
2487 | <<"config=" << config |
2488 | <<"label=" << ll |
2489 | <<"chi2z=" << chi2[0] |
2490 | <<"chi2y=" << chi2[1] |
2491 | <<"Y2exp=" << cond2[0] |
2492 | <<"Z2exp=" << cond2[1] |
2493 | <<"X0=" << xpos[0] //layer[sLayer]->GetX() |
2494 | <<"X1=" << xpos[1] //layer[sLayer + 1]->GetX() |
2495 | <<"X2=" << xpos[2] //layer[sLayer + 2]->GetX() |
2496 | <<"X3=" << xpos[3] //layer[sLayer + 3]->GetX() |
2497 | <<"yref0=" << yref[0] |
2498 | <<"yref1=" << yref[1] |
2499 | <<"yref2=" << yref[2] |
2500 | <<"yref3=" << yref[3] |
2501 | <<"c0.=" << c[0] |
2502 | <<"c1.=" << c[1] |
2503 | <<"c2.=" << c[2] |
2504 | <<"c3.=" << c[3] |
2505 | <<"Seed0.=" << &cseed[planes[0]] |
2506 | <<"Seed1.=" << &cseed[planes[1]] |
2507 | <<"Seed2.=" << &cseed[planes[2]] |
2508 | <<"Seed3.=" << &cseed[planes[3]] |
2509 | <<"RiemanFitter.=" << rim |
2510 | <<"\n"; |
2511 | } |
3a039a31 |
2512 | if(chi2[0] > fReconstructor->GetRecoParam() ->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){ |
91834b8d |
2513 | // //AliInfo(Form("Failed chi2 filter on chi2Z [%f].", chi2[0])); |
d611c74f |
2514 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2515 | continue; |
2516 | } |
3a039a31 |
2517 | if(chi2[1] > fReconstructor->GetRecoParam() ->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){ |
91834b8d |
2518 | // //AliInfo(Form("Failed chi2 filter on chi2Y [%f].", chi2[1])); |
d611c74f |
2519 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2520 | continue; |
2521 | } |
2522 | //AliInfo("Passed chi2 filter."); |
2523 | |
2524 | // try attaching clusters to tracklets |
d611c74f |
2525 | Int_t mlayers = 0; |
be24510a |
2526 | for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){ |
d611c74f |
2527 | Int_t jLayer = planes[iLayer]; |
f29f13a6 |
2528 | if(!cseed[jLayer].AttachClusters(stack[jLayer], kTRUE)) continue; |
2529 | cseed[jLayer].UpdateUsed(); |
2530 | if(!cseed[jLayer].IsOK()) continue; |
d611c74f |
2531 | mlayers++; |
2532 | } |
be24510a |
2533 | |
2534 | if(mlayers < kNSeedPlanes){ |
2535 | //AliInfo(Form("Failed updating all seeds %d [%d].", mlayers, kNSeedPlanes)); |
2536 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2537 | continue; |
2538 | } |
2539 | |
2540 | // temporary exit door for the HLT |
4302c900 |
2541 | if(fReconstructor->IsHLT()){ |
be24510a |
2542 | // attach clusters to extrapolation chambers |
2543 | for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){ |
2544 | Int_t jLayer = planesExt[iLayer]; |
2545 | if(!(chamber = stack[jLayer])) continue; |
f29f13a6 |
2546 | cseed[jLayer].AttachClusters(chamber, kTRUE); |
be24510a |
2547 | } |
4302c900 |
2548 | fTrackQuality[ntracks] = 1.; // dummy value |
2549 | ntracks++; |
218ba867 |
2550 | if(ntracks == kMaxTracksStack) return ntracks; |
4302c900 |
2551 | cseed += 6; |
2552 | continue; |
2553 | } |
2554 | |
be24510a |
2555 | |
f29f13a6 |
2556 | // Update Seeds and calculate Likelihood |
d611c74f |
2557 | // fit tracklets and cook likelihood |
f29f13a6 |
2558 | FitTiltedRieman(&cseed[0], kTRUE); |
2559 | for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){ |
2560 | Int_t jLayer = planes[iLayer]; |
2561 | cseed[jLayer].Fit(kTRUE); |
2562 | } |
91834b8d |
2563 | Double_t like = CookLikelihood(&cseed[0], planes); // to be checked |
d611c74f |
2564 | |
3a039a31 |
2565 | if (TMath::Log(1.E-9 + like) < fReconstructor->GetRecoParam() ->GetTrackLikelihood()){ |
d611c74f |
2566 | //AliInfo(Form("Failed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); |
2567 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2568 | continue; |
2569 | } |
2570 | //AliInfo(Form("Passed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); |
2571 | |
2572 | // book preliminary results |
2573 | seedQuality[ntracks] = like; |
2574 | fSeedLayer[ntracks] = config;/*sLayer;*/ |
2575 | |
2576 | // attach clusters to the extrapolation seeds |
be24510a |
2577 | for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){ |
2578 | Int_t jLayer = planesExt[iLayer]; |
d611c74f |
2579 | if(!(chamber = stack[jLayer])) continue; |
d611c74f |
2580 | |
2581 | // fit extrapolated seed |
2582 | if ((jLayer == 0) && !(cseed[1].IsOK())) continue; |
2583 | if ((jLayer == 5) && !(cseed[4].IsOK())) continue; |
2584 | AliTRDseedV1 pseed = cseed[jLayer]; |
f29f13a6 |
2585 | if(!pseed.AttachClusters(chamber, kTRUE)) continue; |
2586 | pseed.Fit(kTRUE); |
d611c74f |
2587 | cseed[jLayer] = pseed; |
d611c74f |
2588 | FitTiltedRieman(cseed, kTRUE); |
f29f13a6 |
2589 | cseed[jLayer].Fit(kTRUE); |
d611c74f |
2590 | } |
2591 | |
2592 | // AliInfo("Extrapolation done."); |
2593 | // Debug Stream containing all the 6 tracklets |
3a039a31 |
2594 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
29f95561 |
2595 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f |
2596 | TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); |
2597 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2598 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2599 | cstreamer << "MakeSeeds1" |
2600 | << "EventNumber=" << eventNumber |
2601 | << "CandidateNumber=" << candidateNumber |
2602 | << "S0.=" << &cseed[0] |
2603 | << "S1.=" << &cseed[1] |
2604 | << "S2.=" << &cseed[2] |
2605 | << "S3.=" << &cseed[3] |
2606 | << "S4.=" << &cseed[4] |
2607 | << "S5.=" << &cseed[5] |
2608 | << "FitterT.=" << tiltedRieman |
2609 | << "\n"; |
2610 | } |
2611 | |
fb872574 |
2612 | if(fReconstructor->GetRecoParam()->HasImproveTracklets() && ImproveSeedQuality(stack, cseed) < 4){ |
d611c74f |
2613 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2614 | continue; |
2615 | } |
2616 | //AliInfo("Improve seed quality done."); |
2617 | |
2618 | // fit full track and cook likelihoods |
2619 | // Double_t curv = FitRieman(&cseed[0], chi2); |
2620 | // Double_t chi2ZF = chi2[0] / TMath::Max((mlayers - 3.), 1.); |
2621 | // Double_t chi2RF = chi2[1] / TMath::Max((mlayers - 3.), 1.); |
2622 | |
2623 | // do the final track fitting (Once with vertex constraint and once without vertex constraint) |
2624 | Double_t chi2Vals[3]; |
2625 | chi2Vals[0] = FitTiltedRieman(&cseed[0], kFALSE); |
91834b8d |
2626 | if(fReconstructor->GetRecoParam()->IsVertexConstrained()) |
d611c74f |
2627 | chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ()); // Do Vertex Constrained fit if desired |
2628 | else |
2629 | chi2Vals[1] = 1.; |
2630 | chi2Vals[2] = GetChi2Z(&cseed[0]) / TMath::Max((mlayers - 3.), 1.); |
2631 | // Chi2 definitions in testing stage |
2632 | //chi2Vals[2] = GetChi2ZTest(&cseed[0]); |
2633 | fTrackQuality[ntracks] = CalculateTrackLikelihood(&cseed[0], &chi2Vals[0]); |
2634 | //AliInfo("Hyperplane fit done\n"); |
fac58f00 |
2635 | |
3a039a31 |
2636 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
29f95561 |
2637 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f |
2638 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2639 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2640 | TLinearFitter *fitterTC = GetTiltedRiemanFitterConstraint(); |
2641 | TLinearFitter *fitterT = GetTiltedRiemanFitter(); |
91834b8d |
2642 | Int_t ncls = 0; |
2643 | for(Int_t iseed = 0; iseed < kNPlanes; iseed++){ |
2644 | ncls += cseed[iseed].IsOK() ? cseed[iseed].GetN2() : 0; |
2645 | } |
d611c74f |
2646 | cstreamer << "MakeSeeds2" |
2647 | << "EventNumber=" << eventNumber |
2648 | << "CandidateNumber=" << candidateNumber |
2649 | << "Chi2TR=" << chi2Vals[0] |
2650 | << "Chi2TC=" << chi2Vals[1] |
2651 | << "Nlayers=" << mlayers |
91834b8d |
2652 | << "NClusters=" << ncls |
d611c74f |
2653 | << "Like=" << like |
2654 | << "S0.=" << &cseed[0] |
2655 | << "S1.=" << &cseed[1] |
2656 | << "S2.=" << &cseed[2] |
2657 | << "S3.=" << &cseed[3] |
2658 | << "S4.=" << &cseed[4] |
2659 | << "S5.=" << &cseed[5] |
d611c74f |
2660 | << "FitterT.=" << fitterT |
2661 | << "FitterTC.=" << fitterTC |
2662 | << "\n"; |
2663 | } |
2664 | |
2665 | ntracks++; |
2666 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2667 | if(ntracks == kMaxTracksStack){ |
2668 | AliWarning(Form("Number of seeds reached maximum allowed (%d) in stack.", kMaxTracksStack)); |
2669 | return ntracks; |
2670 | } |
2671 | cseed += 6; |
41702fec |
2672 | } |
2673 | } |
2674 | } |
41702fec |
2675 | |
2676 | return ntracks; |
e4f2f73d |
2677 | } |
2678 | |
2679 | //_____________________________________________________________________________ |
0906e73e |
2680 | AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 *seeds, Double_t *params) |
e4f2f73d |
2681 | { |
41702fec |
2682 | // |
2683 | // Build a TRD track out of tracklet candidates |
2684 | // |
2685 | // Parameters : |
2686 | // seeds : array of tracklets |
2687 | // params : track parameters (see MakeSeeds() function body for a detailed description) |
2688 | // |
2689 | // Output : |
2690 | // The TRD track. |
2691 | // |
2692 | // Detailed description |
2693 | // |
2694 | // To be discussed with Marian !! |
2695 | // |
2696 | |
41702fec |
2697 | |
2698 | Double_t alpha = AliTRDgeometry::GetAlpha(); |
2699 | Double_t shift = AliTRDgeometry::GetAlpha()/2.0; |
2700 | Double_t c[15]; |
2701 | |
2702 | c[ 0] = 0.2; |
2703 | c[ 1] = 0.0; c[ 2] = 2.0; |
2704 | c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02; |
2705 | c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1; |
2706 | c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01; |
2707 | |
d20df6fc |
2708 | AliTRDtrackV1 track(seeds, ¶ms[1], c, params[0], params[6]*alpha+shift); |
2709 | track.PropagateTo(params[0]-5.0); |
f29f13a6 |
2710 | AliTRDseedV1 *ptrTracklet = 0x0; |
2711 | // Sign clusters |
2712 | for (Int_t jLayer = 0; jLayer < AliTRDgeometry::kNlayer; jLayer++) { |
2713 | ptrTracklet = &seeds[jLayer]; |
2714 | if(!ptrTracklet->IsOK()) continue; |
2715 | if(TMath::Abs(ptrTracklet->GetYref(1) - ptrTracklet->GetYfit(1)) >= .2) continue; // check this condition with Marian |
2716 | } |
2717 | // |
91834b8d |
2718 | if(fReconstructor->IsHLT()){ |
91834b8d |
2719 | for(Int_t ip=0; ip<kNPlanes; ip++){ |
2720 | track.UnsetTracklet(ip); |
2721 | ptrTracklet = SetTracklet(&seeds[ip]); |
f29f13a6 |
2722 | ptrTracklet->UseClusters(); |
91834b8d |
2723 | track.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); |
2724 | } |
d78d7df0 |
2725 | AliTRDtrackV1 *ptrTrack = SetTrack(&track); |
2726 | ptrTrack->SetReconstructor(fReconstructor); |
2727 | return ptrTrack; |
91834b8d |
2728 | } |
393fda1c |
2729 | |
d20df6fc |
2730 | track.ResetCovariance(1); |
e79f8eb0 |
2731 | Int_t nc = TMath::Abs(FollowBackProlongation(track)); |
393fda1c |
2732 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 5){ |
2733 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2734 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2735 | Double_t p[5]; // Track Params for the Debug Stream |
2736 | track.GetExternalParameters(params[0], p); |
29f95561 |
2737 | TTreeSRedirector &cs = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
393fda1c |
2738 | cs << "MakeTrack" |
2739 | << "EventNumber=" << eventNumber |
2740 | << "CandidateNumber=" << candidateNumber |
2741 | << "nc=" << nc |
2742 | << "X=" << params[0] |
2743 | << "Y=" << p[0] |
2744 | << "Z=" << p[1] |
2745 | << "snp=" << p[2] |
2746 | << "tnd=" << p[3] |
2747 | << "crv=" << p[4] |
2748 | << "Yin=" << params[1] |
2749 | << "Zin=" << params[2] |
2750 | << "snpin=" << params[3] |
2751 | << "tndin=" << params[4] |
2752 | << "crvin=" << params[5] |
2753 | << "track.=" << &track |
2754 | << "\n"; |
2755 | } |
d20df6fc |
2756 | if (nc < 30) return 0x0; |
2757 | |
2758 | AliTRDtrackV1 *ptrTrack = SetTrack(&track); |
215f7116 |
2759 | ptrTrack->SetReconstructor(fReconstructor); |
48f8adf3 |
2760 | ptrTrack->CookLabel(.9); |
24253b0a |
2761 | |
d20df6fc |
2762 | // computes PID for track |
2763 | ptrTrack->CookPID(); |
2764 | // update calibration references using this track |
48f8adf3 |
2765 | AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); |
2766 | if (!calibra){ |
2767 | AliInfo("Could not get Calibra instance\n"); |
2768 | if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(ptrTrack); |
2769 | } |
d20df6fc |
2770 | return ptrTrack; |
e4f2f73d |
2771 | } |
2772 | |
0906e73e |
2773 | |
e4f2f73d |
2774 | //____________________________________________________________________ |
eb38ed55 |
2775 | Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *cseed) |
e4f2f73d |
2776 | { |
41702fec |
2777 | // |
2778 | // Sort tracklets according to "quality" and try to "improve" the first 4 worst |
2779 | // |
2780 | // Parameters : |
2781 | // layers : Array of propagation layers for a stack/supermodule |
2782 | // cseed : Array of 6 seeding tracklets which has to be improved |
2783 | // |
f29f13a6 |
2784 | // Output : |
41702fec |
2785 | // cssed : Improved seeds |
2786 | // |
2787 | // Detailed description |
2788 | // |
2789 | // Iterative procedure in which new clusters are searched for each |
2790 | // tracklet seed such that the seed quality (see AliTRDseed::GetQuality()) |
2791 | // can be maximized. If some optimization is found the old seeds are replaced. |
2792 | // |
2793 | // debug level: 7 |
2794 | // |
2795 | |
2796 | // make a local working copy |
2797 | AliTRDtrackingChamber *chamber = 0x0; |
2798 | AliTRDseedV1 bseed[6]; |
2799 | Int_t nLayers = 0; |
2800 | for (Int_t jLayer = 0; jLayer < 6; jLayer++) bseed[jLayer] = cseed[jLayer]; |
2801 | |
2802 | Float_t lastquality = 10000.0; |
2803 | Float_t lastchi2 = 10000.0; |
2804 | Float_t chi2 = 1000.0; |
2805 | |
2806 | for (Int_t iter = 0; iter < 4; iter++) { |
2807 | Float_t sumquality = 0.0; |
2808 | Float_t squality[6]; |
2809 | Int_t sortindexes[6]; |
2810 | |
2811 | for (Int_t jLayer = 0; jLayer < 6; jLayer++) { |
3a039a31 |
2812 | squality[jLayer] = bseed[jLayer].IsOK() ? bseed[jLayer].GetQuality(kTRUE) : 1000.; |
41702fec |
2813 | sumquality += squality[jLayer]; |
2814 | } |
2815 | if ((sumquality >= lastquality) || (chi2 > lastchi2)) break; |
2816 | |
2817 | nLayers = 0; |
2818 | lastquality = sumquality; |
2819 | lastchi2 = chi2; |
2820 | if (iter > 0) for (Int_t jLayer = 0; jLayer < 6; jLayer++) cseed[jLayer] = bseed[jLayer]; |
2821 | |
2822 | TMath::Sort(6, squality, sortindexes, kFALSE); |
2823 | for (Int_t jLayer = 5; jLayer > 1; jLayer--) { |
2824 | Int_t bLayer = sortindexes[jLayer]; |
2825 | if(!(chamber = stack[bLayer])) continue; |
f29f13a6 |
2826 | bseed[bLayer].AttachClusters(chamber, kTRUE); |
2827 | bseed[bLayer].Fit(kTRUE); |
41702fec |
2828 | if(bseed[bLayer].IsOK()) nLayers++; |
2829 | } |
2830 | |
2831 | chi2 = FitTiltedRieman(bseed, kTRUE); |
3a039a31 |
2832 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 7){ |
41702fec |
2833 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2834 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2835 | TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); |
29f95561 |
2836 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
2837 | cstreamer << "ImproveSeedQuality" |
2838 | << "EventNumber=" << eventNumber |
2839 | << "CandidateNumber=" << candidateNumber |
2840 | << "Iteration=" << iter |
2841 | << "S0.=" << &bseed[0] |
2842 | << "S1.=" << &bseed[1] |
2843 | << "S2.=" << &bseed[2] |
2844 | << "S3.=" << &bseed[3] |
2845 | << "S4.=" << &bseed[4] |
2846 | << "S5.=" << &bseed[5] |
2847 | << "FitterT.=" << tiltedRieman |
2848 | << "\n"; |
2849 | } |
2850 | } // Loop: iter |
41702fec |
2851 | // we are sure that at least 2 tracklets are OK ! |
2852 | return nLayers+2; |
e4f2f73d |
2853 | } |
2854 | |
eb38ed55 |
2855 | //_________________________________________________________________________ |
2856 | Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2){ |
41702fec |
2857 | // |
2858 | // Calculates the Track Likelihood value. This parameter serves as main quality criterion for |
2859 | // the track selection |
2860 | // The likelihood value containes: |
2861 | // - The chi2 values from the both fitters and the chi2 values in z-direction from a linear fit |
2862 | // - The Sum of the Parameter |slope_ref - slope_fit|/Sigma of the tracklets |
2863 | // For all Parameters an exponential dependency is used |
2864 | // |
2865 | // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate |
2866 | // - Array of chi2 values: |
2867 | // * Non-Constrained Tilted Riemann fit |
2868 | // * Vertex-Constrained Tilted Riemann fit |
2869 | // * z-Direction from Linear fit |
2870 | // Output: - The calculated track likelihood |
2871 | // |
2872 | // debug level 2 |
2873 | // |
2874 | |
f29f13a6 |
2875 | Double_t chi2phi = 0, nLayers = 0; |
41702fec |
2876 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
2877 | if(!tracklets[iLayer].IsOK()) continue; |
f29f13a6 |
2878 | chi2phi += tracklets[iLayer].GetChi2Phi(); |
41702fec |
2879 | nLayers++; |
2880 | } |
f29f13a6 |
2881 | chi2phi /= Float_t (nLayers - 2.0); |
41702fec |
2882 | |
2883 | Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); // Chi2Z |
3a039a31 |
2884 | Double_t likeChi2TC = (fReconstructor->GetRecoParam() ->IsVertexConstrained()) ? |
d20df6fc |
2885 | TMath::Exp(-chi2[1] * 0.677) : 1; // Constrained Tilted Riemann |
41702fec |
2886 | Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.78); // Non-constrained Tilted Riemann |
f29f13a6 |
2887 | Double_t likeChi2Phi= TMath::Exp(-chi2phi * 3.23); |
2888 | Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeChi2Phi; |
41702fec |
2889 | |
3a039a31 |
2890 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
41702fec |
2891 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2892 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
29f95561 |
2893 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
2894 | cstreamer << "CalculateTrackLikelihood0" |
2895 | << "EventNumber=" << eventNumber |
2896 | << "CandidateNumber=" << candidateNumber |
2897 | << "LikeChi2Z=" << likeChi2Z |
2898 | << "LikeChi2TR=" << likeChi2TR |
2899 | << "LikeChi2TC=" << likeChi2TC |
f29f13a6 |
2900 | << "LikeChi2Phi=" << likeChi2Phi |
41702fec |
2901 | << "TrackLikelihood=" << trackLikelihood |
2902 | << "\n"; |
2903 | } |
2904 | |
2905 | return trackLikelihood; |
e4f2f73d |
2906 | } |
2907 | |
2908 | //____________________________________________________________________ |
91834b8d |
2909 | Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) |
e4f2f73d |
2910 | { |
41702fec |
2911 | // |
2912 | // Calculate the probability of this track candidate. |
2913 | // |
2914 | // Parameters : |
2915 | // cseeds : array of candidate tracklets |
2916 | // planes : array of seeding planes (see seeding configuration) |
2917 | // chi2 : chi2 values (on the Z and Y direction) from the rieman fit of the track. |
2918 | // |
2919 | // Output : |
2920 | // likelihood value |
2921 | // |
2922 | // Detailed description |
2923 | // |
2924 | // The track quality is estimated based on the following 4 criteria: |
2925 | // 1. precision of the rieman fit on the Y direction (likea) |
2926 | // 2. chi2 on the Y direction (likechi2y) |
2927 | // 3. chi2 on the Z direction (likechi2z) |
2928 | // 4. number of attached clusters compared to a reference value |
2929 | // (see AliTRDrecoParam::fkFindable) (likeN) |
2930 | // |
2931 | // The distributions for each type of probabilities are given below as of |
2932 | // (date). They have to be checked to assure consistency of estimation. |
2933 | // |
2934 | |
2935 | // ratio of the total number of clusters/track which are expected to be found by the tracker. |
91834b8d |
2936 | const AliTRDrecoParam *fRecoPars = fReconstructor->GetRecoParam(); |
41702fec |
2937 | |
91834b8d |
2938 | Double_t chi2y = GetChi2Y(&cseed[0]); |
2939 | Double_t chi2z = GetChi2Z(&cseed[0]); |
2940 | |
8ae98148 |
2941 | Float_t nclusters = 0.; |
41702fec |
2942 | Double_t sumda = 0.; |
2943 | for(UChar_t ilayer = 0; ilayer < 4; ilayer++){ |
2944 | Int_t jlayer = planes[ilayer]; |
2945 | nclusters += cseed[jlayer].GetN2(); |
e3cf3d02 |
2946 | sumda += TMath::Abs(cseed[jlayer].GetYfit(1) - cseed[jlayer].GetYref(1)); |
41702fec |
2947 | } |
8ae98148 |
2948 | nclusters *= .25; |
2949 | |
5a2e200c |
2950 | Double_t likea = TMath::Exp(-sumda * fRecoPars->GetPhiSlope()); |
41702fec |
2951 | Double_t likechi2y = 0.0000000001; |
5a2e200c |
2952 | if (fReconstructor->IsCosmic() || chi2y < fRecoPars->GetChi2YCut()) likechi2y += TMath::Exp(-TMath::Sqrt(chi2y) * fRecoPars->GetChi2YSlope()); |
2953 | Double_t likechi2z = TMath::Exp(-chi2z * fRecoPars->GetChi2ZSlope()); |
8ae98148 |
2954 | Double_t likeN = TMath::Exp(-(fRecoPars->GetNMeanClusters() - nclusters) / fRecoPars->GetNSigmaClusters()); |
41702fec |
2955 | Double_t like = likea * likechi2y * likechi2z * likeN; |
2956 | |
2957 | // 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 |
2958 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
41702fec |
2959 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2960 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
91834b8d |
2961 | Int_t nTracklets = 0; Float_t mean_ncls = 0; |
2962 | for(Int_t iseed=0; iseed < kNPlanes; iseed++){ |
2963 | if(!cseed[iseed].IsOK()) continue; |
2964 | nTracklets++; |
2965 | mean_ncls += cseed[iseed].GetN2(); |
2966 | } |
2967 | if(nTracklets) mean_ncls /= nTracklets; |
41702fec |
2968 | // The Debug Stream contains the seed |
29f95561 |
2969 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
2970 | cstreamer << "CookLikelihood" |
2971 | << "EventNumber=" << eventNumber |
2972 | << "CandidateNumber=" << candidateNumber |
2973 | << "tracklet0.=" << &cseed[0] |
2974 | << "tracklet1.=" << &cseed[1] |
2975 | << "tracklet2.=" << &cseed[2] |
2976 | << "tracklet3.=" << &cseed[3] |
2977 | << "tracklet4.=" << &cseed[4] |
2978 | << "tracklet5.=" << &cseed[5] |
2979 | << "sumda=" << sumda |
91834b8d |
2980 | << "chi2y=" << chi2y |
2981 | << "chi2z=" << chi2z |
41702fec |
2982 | << "likea=" << likea |
2983 | << "likechi2y=" << likechi2y |
2984 | << "likechi2z=" << likechi2z |
2985 | << "nclusters=" << nclusters |
2986 | << "likeN=" << likeN |
2987 | << "like=" << like |
91834b8d |
2988 | << "meanncls=" << mean_ncls |
41702fec |
2989 | << "\n"; |
2990 | } |
2991 | |
2992 | return like; |
e4f2f73d |
2993 | } |
2994 | |
e4f2f73d |
2995 | //____________________________________________________________________ |
0906e73e |
2996 | void AliTRDtrackerV1::GetSeedingConfig(Int_t iconfig, Int_t planes[4]) |
e4f2f73d |
2997 | { |
41702fec |
2998 | // |
2999 | // Map seeding configurations to detector planes. |
3000 | // |
3001 | // Parameters : |
3002 | // iconfig : configuration index |
3003 | // planes : member planes of this configuration. On input empty. |
3004 | // |
3005 | // Output : |
3006 | // planes : contains the planes which are defining the configuration |
3007 | // |
3008 | // Detailed description |
3009 | // |
3010 | // Here is the list of seeding planes configurations together with |
3011 | // their topological classification: |
3012 | // |
3013 | // 0 - 5432 TQ 0 |
3014 | // 1 - 4321 TQ 0 |
3015 | // 2 - 3210 TQ 0 |
3016 | // 3 - 5321 TQ 1 |
3017 | // 4 - 4210 TQ 1 |
3018 | // 5 - 5431 TQ 1 |
3019 | // 6 - 4320 TQ 1 |
3020 | // 7 - 5430 TQ 2 |
3021 | // 8 - 5210 TQ 2 |
3022 | // 9 - 5421 TQ 3 |
3023 | // 10 - 4310 TQ 3 |
3024 | // 11 - 5410 TQ 4 |
3025 | // 12 - 5420 TQ 5 |
3026 | // 13 - 5320 TQ 5 |
3027 | // 14 - 5310 TQ 5 |
3028 | // |
3029 | // The topologic quality is modeled as follows: |
3030 | // 1. The general model is define by the equation: |
3031 | // p(conf) = exp(-conf/2) |
3032 | // 2. According to the topologic classification, configurations from the same |
3033 | // class are assigned the agerage value over the model values. |
3034 | // 3. Quality values are normalized. |
3035 | // |
3036 | // The topologic quality distribution as function of configuration is given below: |
3037 | //Begin_Html |
3038 | // <img src="gif/topologicQA.gif"> |
3039 | //End_Html |
3040 | // |
3041 | |
3042 | switch(iconfig){ |
3043 | case 0: // 5432 TQ 0 |
3044 | planes[0] = 2; |
3045 | planes[1] = 3; |
3046 | planes[2] = 4; |
3047 | planes[3] = 5; |
3048 | break; |
3049 | case 1: // 4321 TQ 0 |
3050 | planes[0] = 1; |
3051 | planes[1] = 2; |
3052 | planes[2] = 3; |
3053 | planes[3] = 4; |
3054 | break; |
3055 | case 2: // 3210 TQ 0 |
3056 | planes[0] = 0; |
3057 | planes[1] = 1; |
3058 | planes[2] = 2; |
3059 | planes[3] = 3; |
3060 | break; |
3061 | case 3: // 5321 TQ 1 |
3062 | planes[0] = 1; |
3063 | planes[1] = 2; |
3064 | planes[2] = 3; |
3065 | planes[3] = 5; |
3066 | break; |
3067 | case 4: // 4210 TQ 1 |
3068 | planes[0] = 0; |
3069 | planes[1] = 1; |
3070 | planes[2] = 2; |
3071 | planes[3] = 4; |
3072 | break; |
3073 | case 5: // 5431 TQ 1 |
3074 | planes[0] = 1; |
3075 | planes[1] = 3; |
3076 | planes[2] = 4; |
3077 | planes[3] = 5; |
3078 | break; |
3079 | case 6: // 4320 TQ 1 |
3080 | planes[0] = 0; |
3081 | planes[1] = 2; |
3082 | planes[2] = 3; |
3083 | planes[3] = 4; |
3084 | break; |
3085 | case 7: // 5430 TQ 2 |
3086 | planes[0] = 0; |
3087 | planes[1] = 3; |
3088 | planes[2] = 4; |
3089 | planes[3] = 5; |
3090 | break; |
3091 | case 8: // 5210 TQ 2 |
3092 | planes[0] = 0; |
3093 | planes[1] = 1; |
3094 | planes[2] = 2; |
3095 | planes[3] = 5; |
3096 | break; |
3097 | case 9: // 5421 TQ 3 |
3098 | planes[0] = 1; |
3099 | planes[1] = 2; |
3100 | planes[2] = 4; |
3101 | planes[3] = 5; |
3102 | break; |
3103 | case 10: // 4310 TQ 3 |
3104 | planes[0] = 0; |
3105 | planes[1] = 1; |
3106 | planes[2] = 3; |
3107 | planes[3] = 4; |
3108 | break; |
3109 | case 11: // 5410 TQ 4 |
3110 | planes[0] = 0; |
3111 | planes[1] = 1; |
3112 | planes[2] = 4; |
3113 | planes[3] = 5; |
3114 | break; |
3115 | case 12: // 5420 TQ 5 |
3116 | planes[0] = 0; |
3117 | planes[1] = 2; |
3118 | planes[2] = 4; |
3119 | planes[3] = 5; |
3120 | break; |
3121 | case 13: // 5320 TQ 5 |
3122 | planes[0] = 0; |
3123 | planes[1] = 2; |
3124 | planes[2] = 3; |
3125 | planes[3] = 5; |
3126 | break; |
3127 | case 14: // 5310 TQ 5 |
3128 | planes[0] = 0; |
3129 | planes[1] = 1; |
3130 | planes[2] = 3; |
3131 | planes[3] = 5; |
3132 | break; |
3133 | } |
e4f2f73d |
3134 | } |
3135 | |
3136 | //____________________________________________________________________ |
0906e73e |
3137 | void AliTRDtrackerV1::GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]) |
e4f2f73d |
3138 | { |
41702fec |
3139 | // |
3140 | // Returns the extrapolation planes for a seeding configuration. |
3141 | // |
3142 | // Parameters : |
3143 | // iconfig : configuration index |
3144 | // planes : planes which are not in this configuration. On input empty. |
3145 | // |
3146 | // Output : |
3147 | // planes : contains the planes which are not in the configuration |
3148 | // |
3149 | // Detailed description |
3150 | // |
3151 | |
3152 | switch(iconfig){ |
3153 | case 0: // 5432 TQ 0 |
3154 | planes[0] = 1; |
3155 | planes[1] = 0; |
3156 | break; |
3157 | case 1: // 4321 TQ 0 |
3158 | planes[0] = 5; |
3159 | planes[1] = 0; |
3160 | break; |
3161 | case 2: // 3210 TQ 0 |
3162 | planes[0] = 4; |
3163 | planes[1] = 5; |
3164 | break; |
3165 | case 3: // 5321 TQ 1 |
3166 | planes[0] = 4; |
3167 | planes[1] = 0; |
3168 | break; |
3169 | case 4: // 4210 TQ 1 |
3170 | planes[0] = 5; |
3171 | planes[1] = 3; |
3172 | break; |
3173 | case 5: // 5431 TQ 1 |
3174 | planes[0] = 2; |
3175 | planes[1] = 0; |
3176 | break; |
3177 | case 6: // 4320 TQ 1 |
3178 | planes[0] = 5; |
3179 | planes[1] = 1; |
3180 | break; |
3181 | case 7: // 5430 TQ 2 |
3182 | planes[0] = 2; |
3183 | planes[1] = 1; |
3184 | break; |
3185 | case 8: // 5210 TQ 2 |
3186 | planes[0] = 4; |
3187 | planes[1] = 3; |
3188 | break; |
3189 | case 9: // 5421 TQ 3 |
3190 | planes[0] = 3; |
3191 | planes[1] = 0; |
3192 | break; |
3193 | case 10: // 4310 TQ 3 |
3194 | planes[0] = 5; |
3195 | planes[1] = 2; |
3196 | break; |
3197 | case 11: // 5410 TQ 4 |
3198 | planes[0] = 3; |
3199 | planes[1] = 2; |
3200 | break; |
3201 | case 12: // 5420 TQ 5 |
3202 | planes[0] = 3; |
3203 | planes[1] = 1; |
3204 | break; |
3205 | case 13: // 5320 TQ 5 |
3206 | planes[0] = 4; |
3207 | planes[1] = 1; |
3208 | break; |
3209 | case 14: // 5310 TQ 5 |
3210 | planes[0] = 4; |
3211 | planes[1] = 2; |
3212 | break; |
3213 | } |
e4f2f73d |
3214 | } |
eb38ed55 |
3215 | |
3216 | //____________________________________________________________________ |
3217 | AliCluster* AliTRDtrackerV1::GetCluster(Int_t idx) const |
3218 | { |
41702fec |
3219 | Int_t ncls = fClusters->GetEntriesFast(); |
2f7514a6 |
3220 | return idx >= 0 && idx < ncls ? (AliCluster*)fClusters->UncheckedAt(idx) : 0x0; |
eb38ed55 |
3221 | } |
3222 | |
3b57a3f7 |
3223 | //____________________________________________________________________ |
3224 | AliTRDseedV1* AliTRDtrackerV1::GetTracklet(Int_t idx) const |
3225 | { |
41702fec |
3226 | Int_t ntrklt = fTracklets->GetEntriesFast(); |
2f7514a6 |
3227 | return idx >= 0 && idx < ntrklt ? (AliTRDseedV1*)fTracklets->UncheckedAt(idx) : 0x0; |
3b57a3f7 |
3228 | } |
3229 | |
3230 | //____________________________________________________________________ |
3231 | AliKalmanTrack* AliTRDtrackerV1::GetTrack(Int_t idx) const |
3232 | { |
41702fec |
3233 | Int_t ntrk = fTracks->GetEntriesFast(); |
2f7514a6 |
3234 | return idx >= 0 && idx < ntrk ? (AliKalmanTrack*)fTracks->UncheckedAt(idx) : 0x0; |
3b57a3f7 |
3235 | } |
3236 | |
bb56afff |
3237 | //____________________________________________________________________ |
3238 | Float_t AliTRDtrackerV1::CalculateReferenceX(AliTRDseedV1 *tracklets){ |
41702fec |
3239 | // |
3240 | // Calculates the reference x-position for the tilted Rieman fit defined as middle |
3241 | // of the stack (middle between layers 2 and 3). For the calculation all the tracklets |
3242 | // are taken into account |
3243 | // |
3244 | // Parameters: - Array of tracklets(AliTRDseedV1) |
3245 | // |
3246 | // Output: - The reference x-position(Float_t) |
3247 | // |
3248 | Int_t nDistances = 0; |
3249 | Float_t meanDistance = 0.; |
3250 | Int_t startIndex = 5; |
3251 | for(Int_t il =5; il > 0; il--){ |
3252 | if(tracklets[il].IsOK() && tracklets[il -1].IsOK()){ |
3253 | Float_t xdiff = tracklets[il].GetX0() - tracklets[il -1].GetX0(); |
3254 | meanDistance += xdiff; |
3255 | nDistances++; |
3256 | } |
3257 | if(tracklets[il].IsOK()) startIndex = il; |
3258 | } |
3259 | if(tracklets[0].IsOK()) startIndex = 0; |
3260 | if(!nDistances){ |
3261 | // We should normally never get here |
3262 | Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2); |
3263 | Int_t iok = 0, idiff = 0; |
3264 | // This attempt is worse and should be avoided: |
3265 | // check for two chambers which are OK and repeat this without taking the mean value |
3266 | // Strategy avoids a division by 0; |
3267 | for(Int_t il = 5; il >= 0; il--){ |
3268 | if(tracklets[il].IsOK()){ |
3269 | xpos[iok] = tracklets[il].GetX0(); |
3270 | iok++; |
3271 | startIndex = il; |
3272 | } |
3273 | if(iok) idiff++; // to get the right difference; |
3274 | if(iok > 1) break; |
3275 | } |
3276 | if(iok > 1){ |
3277 | meanDistance = (xpos[0] - xpos[1])/idiff; |
3278 | } |
3279 | else{ |
3280 | // we have do not even have 2 layers which are OK? The we do not need to fit at all |
3281 | return 331.; |
3282 | } |
3283 | } |
3284 | else{ |
3285 | meanDistance /= nDistances; |
3286 | } |
3287 | return tracklets[startIndex].GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
bb56afff |
3288 | } |
eb38ed55 |
3289 | |
fac58f00 |
3290 | // //_____________________________________________________________________________ |
3291 | // Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist |
3292 | // , Int_t *outlist, Bool_t down) |
3293 | // { |
3294 | // // |
3295 | // // Sort eleements according occurancy |
3296 | // // The size of output array has is 2*n |
3297 | // // |
3298 | // |
3299 | // if (n <= 0) { |
3300 | // return 0; |
3301 | // } |
3302 | // |
3303 | // Int_t *sindexS = new Int_t[n]; // Temporary array for sorting |
3304 | // Int_t *sindexF = new Int_t[2*n]; |
3305 | // for (Int_t i = 0; i < n; i++) { |
3306 | // sindexF[i] = 0; |
3307 | // } |
3308 | // |
3309 | // TMath::Sort(n,inlist,sindexS,down); |
3310 | // |
3311 | // Int_t last = inlist[sindexS[0]]; |
3312 | // Int_t val = last; |
3313 | // sindexF[0] = 1; |
3314 | // sindexF[0+n] = last; |
3315 | // Int_t countPos = 0; |
3316 | // |
3317 | // // Find frequency |
3318 | // for (Int_t i = 1; i < n; i++) { |
3319 | // val = inlist[sindexS[i]]; |
3320 | // if (last == val) { |
3321 | // sindexF[countPos]++; |
3322 | // } |
3323 | // else { |
3324 | // countPos++; |
3325 | // sindexF[countPos+n] = val; |
3326 | // sindexF[countPos]++; |
3327 | // last = val; |
3328 | // } |
3329 | // } |
3330 | // if (last == val) { |
3331 | // countPos++; |
3332 | // } |
3333 | // |
3334 | // // Sort according frequency |
3335 | // TMath::Sort(countPos,sindexF,sindexS,kTRUE); |
3336 | // |
3337 | // for (Int_t i = 0; i < countPos; i++) { |
3338 | // outlist[2*i ] = sindexF[sindexS[i]+n]; |
3339 | // outlist[2*i+1] = sindexF[sindexS[i]]; |
3340 | // } |
3341 | // |
3342 | // delete [] sindexS; |
3343 | // delete [] sindexF; |
3344 | // |
3345 | // return countPos; |
3346 | // |
3347 | // } |
bb56afff |
3348 | |
06b32d95 |
3349 | |
d611c74f |
3350 | //____________________________________________________________________ |
3351 | void AliTRDtrackerV1::ResetSeedTB() |
3352 | { |
3353 | // reset buffer for seeding time bin layers. If the time bin |
3354 | // layers are not allocated this function allocates them |
3355 | |
3356 | for(Int_t isl=0; isl<kNSeedPlanes; isl++){ |
3357 | if(!fSeedTB[isl]) fSeedTB[isl] = new AliTRDchamberTimeBin(); |
3358 | else fSeedTB[isl]->Clear(); |
3359 | } |
3360 | } |
3361 | |
e3cf3d02 |
3362 | |
3363 | //_____________________________________________________________________________ |
3364 | Float_t AliTRDtrackerV1::GetChi2Y(AliTRDseedV1 *tracklets) const |
3365 | { |
3366 | // Calculates normalized chi2 in y-direction |
3367 | // chi2 = Sum chi2 / n_tracklets |
3368 | |
3369 | Double_t chi2 = 0.; Int_t n = 0; |
3370 | for(Int_t ipl = kNPlanes; ipl--;){ |
3371 | if(!tracklets[ipl].IsOK()) continue; |
3372 | chi2 += tracklets[ipl].GetChi2Y(); |
3373 | n++; |
3374 | } |
3375 | return n ? chi2/n : 0.; |
3376 | } |
3377 | |
bb56afff |
3378 | //_____________________________________________________________________________ |
3379 | Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const |
3380 | { |
91834b8d |
3381 | // Calculates normalized chi2 in z-direction |
e3cf3d02 |
3382 | // chi2 = Sum chi2 / n_tracklets |
41702fec |
3383 | |
e3cf3d02 |
3384 | Double_t chi2 = 0; Int_t n = 0; |
3385 | for(Int_t ipl = kNPlanes; ipl--;){ |
|