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1 | /************************************************************************** |
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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 | **************************************************************************/ |
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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 | |
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28 | // #include <Riostream.h> |
29 | // #include <stdio.h> |
30 | // #include <string.h> |
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31 | |
32 | #include <TBranch.h> |
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33 | #include <TDirectory.h> |
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34 | #include <TLinearFitter.h> |
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35 | #include <TTree.h> |
36 | #include <TClonesArray.h> |
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37 | #include <TTreeStream.h> |
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38 | #include <TGeoMatrix.h> |
39 | #include <TGeoManager.h> |
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40 | |
41 | #include "AliLog.h" |
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42 | #include "AliMathBase.h" |
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43 | #include "AliESDEvent.h" |
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44 | #include "AliGeomManager.h" |
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45 | #include "AliRieman.h" |
46 | #include "AliTrackPointArray.h" |
47 | |
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48 | #include "AliTRDgeometry.h" |
49 | #include "AliTRDpadPlane.h" |
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50 | #include "AliTRDcalibDB.h" |
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51 | #include "AliTRDReconstructor.h" |
52 | #include "AliTRDCalibraFillHisto.h" |
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53 | #include "AliTRDrecoParam.h" |
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54 | |
55 | #include "AliTRDcluster.h" |
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56 | #include "AliTRDseedV1.h" |
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57 | #include "AliTRDtrackV1.h" |
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58 | #include "AliTRDtrackerV1.h" |
59 | #include "AliTRDtrackerDebug.h" |
60 | #include "AliTRDtrackingChamber.h" |
61 | #include "AliTRDchamberTimeBin.h" |
62 | |
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63 | |
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64 | |
65 | ClassImp(AliTRDtrackerV1) |
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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 |
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73 | Double_t AliTRDtrackerV1::fgTopologicQA[kNConfigs] = { |
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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 |
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77 | }; |
78 | const Double_t AliTRDtrackerV1::fgkX0[kNPlanes] = { |
79 | 300.2, 312.8, 325.4, 338.0, 350.6, 363.2}; |
2985ffcb |
80 | Int_t AliTRDtrackerV1::fgNTimeBins = 0; |
eb38ed55 |
81 | AliRieman* AliTRDtrackerV1::fgRieman = 0x0; |
82 | TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = 0x0; |
83 | TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = 0x0; |
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84 | |
85 | //____________________________________________________________________ |
3a039a31 |
86 | AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) |
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87 | :AliTracker() |
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88 | ,fReconstructor(0x0) |
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89 | ,fGeom(0x0) |
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90 | ,fClusters(0x0) |
91 | ,fTracklets(0x0) |
92 | ,fTracks(0x0) |
93 | ,fSieveSeeding(0) |
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94 | { |
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95 | // |
96 | // Default constructor. |
97 | // |
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98 | |
99 | SetReconstructor(rec); // initialize reconstructor |
100 | |
101 | // initialize geometry |
102 | if(!AliGeomManager::GetGeometry()){ |
103 | AliFatal("Could not get geometry."); |
104 | } |
105 | fGeom = new AliTRDgeometry(); |
106 | fGeom->CreateClusterMatrixArray(); |
107 | TGeoHMatrix *matrix = 0x0; |
108 | Double_t loc[] = {0., 0., 0.}; |
109 | Double_t glb[] = {0., 0., 0.}; |
110 | for(Int_t ily=kNPlanes; ily--;){ |
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111 | Int_t ism = 0; |
112 | while(!(matrix = fGeom->GetClusterMatrix(AliTRDgeometry::GetDetector(ily, 2, ism)))) ism++; |
113 | if(!matrix){ |
114 | AliError(Form("Could not get transformation matrix for layer %d. Use default.", ily)); |
115 | fR[ily] = fgkX0[ily]; |
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116 | continue; |
117 | } |
118 | matrix->LocalToMaster(loc, glb); |
119 | fR[ily] = glb[0]+ AliTRDgeometry::AnodePos()-.5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); |
120 | } |
121 | |
122 | // initialize calibration values |
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123 | AliTRDcalibDB *trd = 0x0; |
124 | if (!(trd = AliTRDcalibDB::Instance())) { |
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125 | AliFatal("Could not get calibration."); |
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126 | } |
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127 | if(!fgNTimeBins) fgNTimeBins = trd->GetNumberOfTimeBins(); |
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128 | |
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129 | // initialize cluster containers |
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130 | for (Int_t isector = 0; isector < AliTRDgeometry::kNsector; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector); |
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131 | |
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132 | // initialize arrays |
133 | memset(fTrackQuality, 0, kMaxTracksStack*sizeof(Double_t)); |
134 | memset(fSeedLayer, 0, kMaxTracksStack*sizeof(Int_t)); |
135 | memset(fSeedTB, 0, kNSeedPlanes*sizeof(AliTRDchamberTimeBin*)); |
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136 | } |
137 | |
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138 | //____________________________________________________________________ |
139 | AliTRDtrackerV1::~AliTRDtrackerV1() |
140 | { |
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141 | // |
142 | // Destructor |
143 | // |
144 | |
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145 | if(fgRieman) delete fgRieman; fgRieman = 0x0; |
146 | if(fgTiltedRieman) delete fgTiltedRieman; fgTiltedRieman = 0x0; |
147 | if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained; fgTiltedRiemanConstrained = 0x0; |
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148 | for(Int_t isl =0; isl<kNSeedPlanes; isl++) if(fSeedTB[isl]) delete fSeedTB[isl]; |
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149 | if(fTracks) {fTracks->Delete(); delete fTracks;} |
150 | if(fTracklets) {fTracklets->Delete(); delete fTracklets;} |
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151 | if(fClusters) { |
152 | fClusters->Delete(); delete fClusters; |
153 | } |
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154 | if(fGeom) delete fGeom; |
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155 | } |
156 | |
157 | //____________________________________________________________________ |
158 | Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd) |
159 | { |
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160 | // |
161 | // Steering stand alone tracking for full TRD detector |
162 | // |
163 | // Parameters : |
164 | // esd : The ESD event. On output it contains |
165 | // the ESD tracks found in TRD. |
166 | // |
167 | // Output : |
168 | // Number of tracks found in the TRD detector. |
169 | // |
170 | // Detailed description |
171 | // 1. Launch individual SM trackers. |
172 | // See AliTRDtrackerV1::Clusters2TracksSM() for details. |
173 | // |
174 | |
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175 | if(!fReconstructor->GetRecoParam() ){ |
176 | AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam()."); |
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177 | return 0; |
178 | } |
179 | |
180 | //AliInfo("Start Track Finder ..."); |
181 | Int_t ntracks = 0; |
053767a4 |
182 | for(int ism=0; ism<AliTRDgeometry::kNsector; ism++){ |
41702fec |
183 | // for(int ism=1; ism<2; ism++){ |
184 | //AliInfo(Form("Processing supermodule %i ...", ism)); |
185 | ntracks += Clusters2TracksSM(ism, esd); |
186 | } |
187 | AliInfo(Form("Number of found tracks : %d", ntracks)); |
188 | return ntracks; |
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189 | } |
190 | |
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191 | |
192 | //_____________________________________________________________________________ |
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193 | Bool_t AliTRDtrackerV1::GetTrackPoint(Int_t index, AliTrackPoint &p) const |
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194 | { |
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195 | //AliInfo(Form("Asking for tracklet %d", index)); |
196 | |
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197 | // reset position of the point before using it |
198 | p.SetXYZ(0., 0., 0.); |
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199 | AliTRDseedV1 *tracklet = GetTracklet(index); |
200 | if (!tracklet) return kFALSE; |
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201 | |
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202 | // get detector for this tracklet |
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203 | Int_t det = tracklet->GetDetector(); |
204 | Int_t sec = fGeom->GetSector(det); |
205 | Double_t alpha = (sec+.5)*AliTRDgeometry::GetAlpha(), |
206 | sinA = TMath::Sin(alpha), |
207 | cosA = TMath::Cos(alpha); |
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208 | Double_t local[3]; |
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209 | local[0] = tracklet->GetX(); |
210 | local[1] = tracklet->GetY(); |
211 | local[2] = tracklet->GetZ(); |
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212 | Double_t global[3]; |
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213 | fGeom->RotateBack(det, local, global); |
214 | |
215 | Double_t cov2D[3]; Float_t cov[6]; |
216 | tracklet->GetCovAt(local[0], cov2D); |
217 | cov[0] = cov2D[0]*sinA*sinA; |
218 | cov[1] =-cov2D[0]*sinA*cosA; |
219 | cov[2] =-cov2D[1]*sinA; |
220 | cov[3] = cov2D[0]*cosA*cosA; |
221 | cov[4] = cov2D[1]*cosA; |
222 | cov[5] = cov2D[2]; |
223 | // store the global position of the tracklet and its covariance matrix in the track point |
224 | p.SetXYZ(global[0],global[1],global[2], cov); |
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225 | |
226 | // setting volume id |
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227 | AliGeomManager::ELayerID iLayer = AliGeomManager::ELayerID(AliGeomManager::kTRD1+fGeom->GetLayer(det)); |
228 | Int_t modId = fGeom->GetSector(det) * AliTRDgeometry::kNstack + fGeom->GetStack(det); |
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229 | UShort_t volid = AliGeomManager::LayerToVolUID(iLayer, modId); |
230 | p.SetVolumeID(volid); |
231 | |
232 | return kTRUE; |
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233 | } |
234 | |
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235 | //____________________________________________________________________ |
236 | TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitter() |
237 | { |
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238 | if(!fgTiltedRieman) fgTiltedRieman = new TLinearFitter(4, "hyp4"); |
239 | return fgTiltedRieman; |
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240 | } |
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241 | |
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242 | //____________________________________________________________________ |
243 | TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitterConstraint() |
244 | { |
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245 | if(!fgTiltedRiemanConstrained) fgTiltedRiemanConstrained = new TLinearFitter(2, "hyp2"); |
246 | return fgTiltedRiemanConstrained; |
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247 | } |
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248 | |
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249 | //____________________________________________________________________ |
250 | AliRieman* AliTRDtrackerV1::GetRiemanFitter() |
251 | { |
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252 | if(!fgRieman) fgRieman = new AliRieman(AliTRDseedV1::kNtb * AliTRDgeometry::kNlayer); |
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253 | return fgRieman; |
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254 | } |
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255 | |
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256 | //_____________________________________________________________________________ |
257 | Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) |
258 | { |
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259 | // |
260 | // Gets seeds from ESD event. The seeds are AliTPCtrack's found and |
261 | // backpropagated by the TPC tracker. Each seed is first propagated |
262 | // to the TRD, and then its prolongation is searched in the TRD. |
263 | // If sufficiently long continuation of the track is found in the TRD |
264 | // the track is updated, otherwise it's stored as originaly defined |
265 | // by the TPC tracker. |
266 | // |
267 | |
268 | // Calibration monitor |
269 | AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); |
270 | if (!calibra) AliInfo("Could not get Calibra instance\n"); |
271 | |
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272 | // Define scalers |
273 | Int_t nFound = 0, // number of tracks found |
274 | nSeeds = 0, // total number of ESD seeds |
275 | nTRDseeds= 0, // number of seeds in the TRD acceptance |
276 | nTPCseeds= 0; // number of TPC seeds |
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277 | Float_t foundMin = 20.0; |
278 | |
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279 | Float_t *quality = 0x0; |
280 | Int_t *index = 0x0; |
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281 | nSeeds = event->GetNumberOfTracks(); |
282 | // Sort tracks according to quality |
283 | // (covariance in the yz plane) |
284 | if(nSeeds){ |
285 | quality = new Float_t[nSeeds]; |
286 | index = new Int_t[nSeeds]; |
287 | for (Int_t iSeed = nSeeds; iSeed--;) { |
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288 | AliESDtrack *seed = event->GetTrack(iSeed); |
289 | Double_t covariance[15]; |
290 | seed->GetExternalCovariance(covariance); |
291 | quality[iSeed] = covariance[0] + covariance[2]; |
292 | } |
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293 | TMath::Sort(nSeeds, quality, index,kFALSE); |
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294 | } |
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295 | |
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296 | // Propagate all seeds |
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297 | Int_t expectedClr; |
298 | AliTRDtrackV1 track; |
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299 | for (Int_t iSeed = 0; iSeed < nSeeds; iSeed++) { |
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300 | |
301 | // Get the seeds in sorted sequence |
302 | AliESDtrack *seed = event->GetTrack(index[iSeed]); |
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303 | Float_t p4 = seed->GetC(seed->GetBz()); |
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304 | |
305 | // Check the seed status |
306 | ULong_t status = seed->GetStatus(); |
307 | if ((status & AliESDtrack::kTPCout) == 0) continue; |
308 | if ((status & AliESDtrack::kTRDout) != 0) continue; |
eb2b4f91 |
309 | |
310 | // Propagate to the entrance in the TRD mother volume |
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311 | new(&track) AliTRDtrackV1(*seed); |
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312 | if(AliTRDgeometry::GetXtrdBeg() > (fgkMaxStep + track.GetX()) && !PropagateToX(track, AliTRDgeometry::GetXtrdBeg(), fgkMaxStep)){ |
313 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
314 | continue; |
315 | } |
316 | if(!AdjustSector(&track)){ |
317 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
318 | continue; |
319 | } |
320 | if(TMath::Abs(track.GetSnp()) > fgkMaxSnp) { |
321 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
322 | continue; |
323 | } |
324 | |
325 | nTPCseeds++; |
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326 | |
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327 | // store track status at TRD entrance |
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328 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); |
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329 | |
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330 | // prepare track and do propagation in the TRD |
331 | track.SetReconstructor(fReconstructor); |
332 | track.SetKink(Bool_t(seed->GetKinkIndex(0))); |
333 | expectedClr = FollowBackProlongation(track); |
334 | // check if track entered the TRD fiducial volume |
335 | if(track.GetTrackLow()){ |
336 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDin); |
337 | nTRDseeds++; |
338 | } |
339 | // check if track was stopped in the TRD |
340 | if (expectedClr<0){ |
341 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
342 | continue; |
343 | } |
ae3fbe1f |
344 | |
345 | if(expectedClr){ |
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346 | nFound++; |
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347 | // computes PID for track |
348 | track.CookPID(); |
349 | // update calibration references using this track |
350 | if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track); |
351 | // save calibration object |
eb2b4f91 |
352 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
224f357f |
353 | AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track); |
354 | calibTrack->SetOwner(); |
355 | seed->AddCalibObject(calibTrack); |
356 | } |
357 | //update ESD track |
41702fec |
358 | if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) { |
2389e96f |
359 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); |
41702fec |
360 | track.UpdateESDtrack(seed); |
41702fec |
361 | } |
362 | } |
363 | |
27fbeba8 |
364 | if ((TMath::Abs(track.GetC(track.GetBz()) - p4) / TMath::Abs(p4) < 0.2) ||(track.Pt() > 0.8)) { |
e3cf3d02 |
365 | |
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366 | // Make backup for back propagation |
41702fec |
367 | Int_t foundClr = track.GetNumberOfClusters(); |
368 | if (foundClr >= foundMin) { |
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369 | track.CookLabel(1. - fgkLabelFraction); |
f29f13a6 |
370 | //if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack()); |
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371 | |
372 | // Sign only gold tracks |
373 | if (track.GetChi2() / track.GetNumberOfClusters() < 4) { |
f29f13a6 |
374 | //if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)) UseClusters(&track); |
41702fec |
375 | } |
376 | Bool_t isGold = kFALSE; |
377 | |
378 | // Full gold track |
379 | if (track.GetChi2() / track.GetNumberOfClusters() < 5) { |
380 | if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); |
381 | |
382 | isGold = kTRUE; |
383 | } |
384 | |
385 | // Almost gold track |
386 | if ((!isGold) && (track.GetNCross() == 0) && (track.GetChi2() / track.GetNumberOfClusters() < 7)) { |
387 | //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); |
388 | if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); |
389 | |
390 | isGold = kTRUE; |
391 | } |
392 | |
393 | if ((!isGold) && (track.GetBackupTrack())) { |
394 | if ((track.GetBackupTrack()->GetNumberOfClusters() > foundMin) && ((track.GetBackupTrack()->GetChi2()/(track.GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) { |
395 | seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); |
396 | isGold = kTRUE; |
397 | } |
398 | } |
41702fec |
399 | } |
400 | } |
401 | |
eb2b4f91 |
402 | // Propagation to the TOF |
403 | if(!(seed->GetStatus()&AliESDtrack::kTRDStop)) { |
404 | Int_t sm = track.GetSector(); |
405 | // default value in case we have problems with the geometry. |
406 | Double_t xtof = 371.; |
407 | //Calculate radial position of the beginning of the TOF |
408 | //mother volume. In order to avoid mixing of the TRD |
409 | //and TOF modules some hard values are needed. This are: |
410 | //1. The path to the TOF module. |
411 | //2. The width of the TOF (29.05 cm) |
412 | //(with the help of Annalisa de Caro Mar-17-2009) |
413 | if(gGeoManager){ |
414 | gGeoManager->cd(Form("/ALIC_1/B077_1/BSEGMO%d_1/BTOF%d_1", sm, sm)); |
415 | TGeoHMatrix *m = 0x0; |
416 | Double_t loc[]={0., 0., -.5*29.05}, glob[3]; |
417 | |
418 | if((m=gGeoManager->GetCurrentMatrix())){ |
419 | m->LocalToMaster(loc, glob); |
420 | xtof = TMath::Sqrt(glob[0]*glob[0]+glob[1]*glob[1]); |
421 | } |
41702fec |
422 | } |
672b48bd |
423 | if(xtof > (fgkMaxStep + track.GetX()) && !PropagateToX(track, xtof, fgkMaxStep)){ |
424 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
425 | continue; |
426 | } |
427 | if(!AdjustSector(&track)){ |
428 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
429 | continue; |
430 | } |
431 | if(TMath::Abs(track.GetSnp()) > fgkMaxSnp){ |
432 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); |
433 | continue; |
434 | } |
eb2b4f91 |
435 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); |
436 | // TODO obsolete - delete |
437 | seed->SetTRDQuality(track.StatusForTOF()); |
41702fec |
438 | } |
41702fec |
439 | seed->SetTRDBudget(track.GetBudget(0)); |
440 | } |
d611c74f |
441 | if(index) delete [] index; |
442 | if(quality) delete [] quality; |
41702fec |
443 | |
d4cf71ca |
444 | AliInfo(Form("Number of seeds: TPCout[%d] TRDin[%d]", nTPCseeds, nTRDseeds)); |
445 | AliInfo(Form("Number of tracks: TRDout[%d]", nFound)); |
446 | |
d611c74f |
447 | // run stand alone tracking |
3a039a31 |
448 | if (fReconstructor->IsSeeding()) Clusters2Tracks(event); |
41702fec |
449 | |
450 | return 0; |
0906e73e |
451 | } |
452 | |
453 | |
454 | //____________________________________________________________________ |
455 | Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) |
456 | { |
41702fec |
457 | // |
458 | // Refits tracks within the TRD. The ESD event is expected to contain seeds |
459 | // at the outer part of the TRD. |
460 | // The tracks are propagated to the innermost time bin |
461 | // of the TRD and the ESD event is updated |
462 | // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch) |
463 | // |
464 | |
465 | Int_t nseed = 0; // contor for loaded seeds |
466 | Int_t found = 0; // contor for updated TRD tracks |
467 | |
468 | |
469 | AliTRDtrackV1 track; |
470 | for (Int_t itrack = 0; itrack < event->GetNumberOfTracks(); itrack++) { |
471 | AliESDtrack *seed = event->GetTrack(itrack); |
472 | new(&track) AliTRDtrackV1(*seed); |
473 | |
474 | if (track.GetX() < 270.0) { |
475 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); |
476 | continue; |
477 | } |
478 | |
e3cf3d02 |
479 | // reject tracks which failed propagation in the TRD or |
480 | // are produced by the TRD stand alone tracker |
41702fec |
481 | ULong_t status = seed->GetStatus(); |
e3cf3d02 |
482 | if(!(status & AliESDtrack::kTRDout)) continue; |
483 | if(!(status & AliESDtrack::kTRDin)) continue; |
41702fec |
484 | nseed++; |
485 | |
486 | track.ResetCovariance(50.0); |
487 | |
488 | // do the propagation and processing |
489 | Bool_t kUPDATE = kFALSE; |
490 | Double_t xTPC = 250.0; |
491 | if(FollowProlongation(track)){ |
492 | // Prolongate to TPC |
493 | if (PropagateToX(track, xTPC, fgkMaxStep)) { // -with update |
e3cf3d02 |
494 | seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit); |
495 | found++; |
496 | kUPDATE = kTRUE; |
497 | } |
498 | |
499 | // Update the friend track |
500 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
501 | TObject *o = 0x0; Int_t ic = 0; |
502 | AliTRDtrackV1 *calibTrack = 0x0; |
503 | while((o = seed->GetCalibObject(ic++))){ |
504 | if(!(calibTrack = dynamic_cast<AliTRDtrackV1*>(o))) continue; |
505 | calibTrack->SetTrackHigh(track.GetTrackHigh()); |
506 | } |
41702fec |
507 | } |
e3cf3d02 |
508 | } |
41702fec |
509 | |
510 | // Prolongate to TPC without update |
511 | if(!kUPDATE) { |
512 | AliTRDtrackV1 tt(*seed); |
e3cf3d02 |
513 | if (PropagateToX(tt, xTPC, fgkMaxStep)) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDbackup); |
41702fec |
514 | } |
515 | } |
516 | AliInfo(Form("Number of loaded seeds: %d",nseed)); |
517 | AliInfo(Form("Number of found tracks from loaded seeds: %d",found)); |
518 | |
519 | return 0; |
0906e73e |
520 | } |
521 | |
0906e73e |
522 | //____________________________________________________________________ |
523 | Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) |
524 | { |
41702fec |
525 | // Extrapolates the TRD track in the TPC direction. |
526 | // |
527 | // Parameters |
528 | // t : the TRD track which has to be extrapolated |
529 | // |
530 | // Output |
531 | // number of clusters attached to the track |
532 | // |
533 | // Detailed description |
534 | // |
535 | // Starting from current radial position of track <t> this function |
536 | // extrapolates the track through the 6 TRD layers. The following steps |
537 | // are being performed for each plane: |
538 | // 1. prepare track: |
539 | // a. get plane limits in the local x direction |
540 | // b. check crossing sectors |
541 | // c. check track inclination |
542 | // 2. search tracklet in the tracker list (see GetTracklet() for details) |
543 | // 3. evaluate material budget using the geo manager |
544 | // 4. propagate and update track using the tracklet information. |
545 | // |
546 | // Debug level 2 |
547 | // |
548 | |
e3cf3d02 |
549 | Bool_t kStoreIn = kTRUE; |
41702fec |
550 | Int_t nClustersExpected = 0; |
e3cf3d02 |
551 | for (Int_t iplane = kNPlanes; iplane--;) { |
41702fec |
552 | Int_t index = 0; |
553 | AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); |
554 | if(!tracklet) continue; |
555 | if(!tracklet->IsOK()) AliWarning("tracklet not OK"); |
556 | |
e3cf3d02 |
557 | Double_t x = tracklet->GetX();//GetX0(); |
41702fec |
558 | // reject tracklets which are not considered for inward refit |
559 | if(x > t.GetX()+fgkMaxStep) continue; |
560 | |
561 | // append tracklet to track |
562 | t.SetTracklet(tracklet, index); |
563 | |
564 | if (x < (t.GetX()-fgkMaxStep) && !PropagateToX(t, x+fgkMaxStep, fgkMaxStep)) break; |
565 | if (!AdjustSector(&t)) break; |
566 | |
567 | // Start global position |
568 | Double_t xyz0[3]; |
569 | t.GetXYZ(xyz0); |
570 | |
571 | // End global position |
572 | Double_t alpha = t.GetAlpha(), y, z; |
573 | if (!t.GetProlongation(x,y,z)) break; |
574 | Double_t xyz1[3]; |
575 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); |
576 | xyz1[1] = x * TMath::Sin(alpha) + y * TMath::Cos(alpha); |
577 | xyz1[2] = z; |
578 | |
51a23065 |
579 | Double_t length = TMath::Sqrt( |
580 | (xyz0[0]-xyz1[0])*(xyz0[0]-xyz1[0]) + |
581 | (xyz0[1]-xyz1[1])*(xyz0[1]-xyz1[1]) + |
582 | (xyz0[2]-xyz1[2])*(xyz0[2]-xyz1[2]) |
583 | ); |
584 | if(length>0.){ |
585 | // Get material budget |
586 | Double_t param[7]; |
587 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) break; |
588 | Double_t xrho= param[0]*param[4]; |
589 | Double_t xx0 = param[1]; // Get mean propagation parameters |
590 | |
591 | // Propagate and update |
592 | t.PropagateTo(x, xx0, xrho); |
593 | if (!AdjustSector(&t)) break; |
594 | } |
e3cf3d02 |
595 | if(kStoreIn){ |
596 | t.SetTrackHigh(); |
597 | kStoreIn = kFALSE; |
598 | } |
599 | |
b72f4eaf |
600 | Double_t cov[3]; tracklet->GetCovAt(x, cov); |
601 | Double_t p[2] = { tracklet->GetY(), tracklet->GetZ()}; |
602 | Double_t chi2 = ((AliExternalTrackParam)t).GetPredictedChi2(p, cov); |
603 | if (chi2 < 1e+10 && t.Update(p, cov, chi2)){ |
41702fec |
604 | nClustersExpected += tracklet->GetN(); |
605 | } |
606 | } |
607 | |
3a039a31 |
608 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
41702fec |
609 | Int_t index; |
51a23065 |
610 | for(int iplane=0; iplane<AliTRDgeometry::kNlayer; iplane++){ |
41702fec |
611 | AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); |
612 | if(!tracklet) continue; |
613 | t.SetTracklet(tracklet, index); |
614 | } |
615 | |
616 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
29f95561 |
617 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
eb2b4f91 |
618 | AliTRDtrackV1 track(t); |
619 | track.SetOwner(); |
41702fec |
620 | cstreamer << "FollowProlongation" |
621 | << "EventNumber=" << eventNumber |
622 | << "ncl=" << nClustersExpected |
eb2b4f91 |
623 | << "track.=" << &track |
41702fec |
624 | << "\n"; |
625 | } |
626 | |
627 | return nClustersExpected; |
0906e73e |
628 | |
629 | } |
630 | |
631 | //_____________________________________________________________________________ |
632 | Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) |
633 | { |
41702fec |
634 | // Extrapolates the TRD track in the TOF direction. |
635 | // |
636 | // Parameters |
637 | // t : the TRD track which has to be extrapolated |
638 | // |
639 | // Output |
640 | // number of clusters attached to the track |
641 | // |
642 | // Detailed description |
643 | // |
644 | // Starting from current radial position of track <t> this function |
645 | // extrapolates the track through the 6 TRD layers. The following steps |
646 | // are being performed for each plane: |
647 | // 1. prepare track: |
648 | // a. get plane limits in the local x direction |
649 | // b. check crossing sectors |
650 | // c. check track inclination |
651 | // 2. build tracklet (see AliTRDseed::AttachClusters() for details) |
652 | // 3. evaluate material budget using the geo manager |
653 | // 4. propagate and update track using the tracklet information. |
654 | // |
655 | // Debug level 2 |
656 | // |
657 | |
eb2b4f91 |
658 | Int_t n = 0; |
659 | Double_t driftLength = .5*AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick(); |
41702fec |
660 | AliTRDtrackingChamber *chamber = 0x0; |
661 | |
3b57a3f7 |
662 | AliTRDseedV1 tracklet, *ptrTracklet = 0x0; |
181d2c97 |
663 | // in case of stand alone tracking we store all the pointers to the tracklets in a temporary array |
664 | AliTRDseedV1 *tracklets[kNPlanes]; |
665 | memset(tracklets, 0, sizeof(AliTRDseedV1 *) * kNPlanes); |
666 | for(Int_t ip = 0; ip < kNPlanes; ip++){ |
667 | tracklets[ip] = t.GetTracklet(ip); |
668 | t.UnsetTracklet(ip); |
669 | } |
81a6494d |
670 | Bool_t kStoreIn = kTRUE, kPropagateIn = kTRUE; |
e3cf3d02 |
671 | |
053767a4 |
672 | // Loop through the TRD layers |
eb2b4f91 |
673 | TGeoHMatrix *matrix = 0x0; |
674 | Double_t x, y, z; |
675 | for (Int_t ily=0, sm=-1, stk=-1, det=-1; ily < AliTRDgeometry::kNlayer; ily++) { |
676 | // rough estimate of the entry point |
677 | if (!t.GetProlongation(fR[ily], y, z)){ |
678 | n=-1; |
679 | t.SetStatus(AliTRDtrackV1::kProlongation); |
680 | break; |
681 | } |
41702fec |
682 | |
eb2b4f91 |
683 | // find sector / stack / detector |
684 | sm = t.GetSector(); |
685 | // TODO cross check with y value ! |
686 | stk = fGeom->GetStack(z, ily); |
687 | det = stk>=0 ? AliTRDgeometry::GetDetector(ily, stk, sm) : -1; |
688 | matrix = det>=0 ? fGeom->GetClusterMatrix(det) : 0x0; |
689 | |
690 | // check if supermodule/chamber is installed |
691 | if( !fGeom->GetSMstatus(sm) || |
692 | stk<0. || |
693 | fGeom->IsHole(ily, stk, sm) || |
694 | !matrix ){ |
695 | // propagate to the default radial position |
696 | if(fR[ily] > (fgkMaxStep + t.GetX()) && !PropagateToX(t, fR[ily], fgkMaxStep)){ |
697 | n=-1; |
698 | t.SetStatus(AliTRDtrackV1::kPropagation); |
41702fec |
699 | break; |
700 | } |
eb2b4f91 |
701 | if(!AdjustSector(&t)){ |
702 | n=-1; |
703 | t.SetStatus(AliTRDtrackV1::kAdjustSector); |
704 | break; |
705 | } |
706 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp){ |
707 | n=-1; |
708 | t.SetStatus(AliTRDtrackV1::kSnp); |
709 | break; |
710 | } |
711 | t.SetStatus(AliTRDtrackV1::kGeometry, ily); |
41702fec |
712 | continue; |
713 | } |
e3cf3d02 |
714 | |
eb2b4f91 |
715 | // retrieve rotation matrix for the current chamber |
716 | Double_t loc[] = {AliTRDgeometry::AnodePos()- driftLength, 0., 0.}; |
717 | Double_t glb[] = {0., 0., 0.}; |
718 | matrix->LocalToMaster(loc, glb); |
719 | |
720 | // Propagate to the radial distance of the current layer |
721 | x = glb[0] - fgkMaxStep; |
722 | if(x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x, fgkMaxStep)){ |
723 | n=-1; |
724 | t.SetStatus(AliTRDtrackV1::kPropagation); |
725 | break; |
726 | } |
727 | if(!AdjustSector(&t)){ |
728 | n=-1; |
729 | t.SetStatus(AliTRDtrackV1::kAdjustSector); |
730 | break; |
731 | } |
732 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) { |
733 | n=-1; |
734 | t.SetStatus(AliTRDtrackV1::kSnp); |
735 | break; |
736 | } |
737 | Bool_t RECALCULATE = kFALSE; |
738 | if(sm != t.GetSector()){ |
739 | sm = t.GetSector(); |
740 | RECALCULATE = kTRUE; |
741 | } |
742 | if(stk != fGeom->GetStack(z, ily)){ |
743 | stk = fGeom->GetStack(z, ily); |
744 | RECALCULATE = kTRUE; |
745 | } |
746 | if(RECALCULATE){ |
747 | det = AliTRDgeometry::GetDetector(ily, stk, sm); |
748 | if(!(matrix = fGeom->GetClusterMatrix(det))){ |
749 | t.SetStatus(AliTRDtrackV1::kGeometry, ily); |
750 | continue; |
751 | } |
752 | matrix->LocalToMaster(loc, glb); |
753 | x = glb[0] - fgkMaxStep; |
754 | } |
755 | |
756 | // check if track is well inside fiducial volume |
757 | if (!t.GetProlongation(x+fgkMaxStep, y, z)) { |
758 | n=-1; |
759 | t.SetStatus(AliTRDtrackV1::kProlongation); |
760 | break; |
761 | } |
762 | if(fGeom->IsOnBoundary(det, y, z, .5)){ |
763 | t.SetStatus(AliTRDtrackV1::kBoundary, ily); |
764 | continue; |
765 | } |
766 | // mark track as entering the FIDUCIAL volume of TRD |
e3cf3d02 |
767 | if(kStoreIn){ |
768 | t.SetTrackLow(); |
769 | kStoreIn = kFALSE; |
770 | } |
b1957d3c |
771 | |
eb2b4f91 |
772 | ptrTracklet = tracklets[ily]; |
773 | if(!ptrTracklet){ // BUILD TRACKLET |
774 | // check data in supermodule |
775 | if(!fTrSec[sm].GetNChambers()){ |
776 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
777 | continue; |
778 | } |
779 | if(fTrSec[sm].GetX(ily) < 1.){ |
780 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
781 | continue; |
782 | } |
783 | |
784 | // check data in chamber |
785 | if(!(chamber = fTrSec[sm].GetChamber(stk, ily))){ |
786 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
787 | continue; |
788 | } |
789 | if(chamber->GetNClusters() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()){ |
790 | t.SetStatus(AliTRDtrackV1::kNoClusters, ily); |
791 | continue; |
792 | } |
793 | // build tracklet |
794 | ptrTracklet = new(&tracklet) AliTRDseedV1(det); |
795 | ptrTracklet->SetReconstructor(fReconstructor); |
796 | ptrTracklet->SetKink(t.IsKink()); |
797 | ptrTracklet->SetPadPlane(fGeom->GetPadPlane(ily, stk)); |
798 | ptrTracklet->SetX0(glb[0]+driftLength); |
799 | if(!tracklet.Init(&t)){ |
800 | n=-1; |
801 | t.SetStatus(AliTRDtrackV1::kTrackletInit); |
802 | break; |
803 | } |
804 | if(!tracklet.AttachClusters(chamber, kTRUE)){ |
805 | t.SetStatus(AliTRDtrackV1::kNoAttach, ily); |
806 | continue; |
807 | } |
808 | if(tracklet.GetN() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()){ |
809 | t.SetStatus(AliTRDtrackV1::kNoClustersTracklet, ily); |
810 | continue; |
811 | } |
812 | ptrTracklet->UpdateUsed(); |
813 | } |
814 | |
815 | // propagate track to the radial position of the tracklet |
816 | ptrTracklet->UseClusters(); // TODO ? do we need this here ? |
817 | // fit tracklet no tilt correction |
818 | if(!ptrTracklet->Fit(kFALSE)){ |
819 | t.SetStatus(AliTRDtrackV1::kNoFit, ily); |
820 | continue; |
821 | } |
822 | x = ptrTracklet->GetX(); //GetX0(); |
823 | if(x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x, fgkMaxStep)) { |
824 | n=-1; |
825 | t.SetStatus(AliTRDtrackV1::kPropagation); |
826 | break; |
827 | } |
828 | if(!AdjustSector(&t)) { |
829 | n=-1; |
830 | t.SetStatus(AliTRDtrackV1::kAdjustSector); |
831 | break; |
41702fec |
832 | } |
eb2b4f91 |
833 | if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) { |
834 | n=-1; |
835 | t.SetStatus(AliTRDtrackV1::kSnp); |
836 | break; |
837 | } |
838 | |
81a6494d |
839 | if(kPropagateIn){ |
840 | t.SetTrackLow(); |
841 | kPropagateIn = kFALSE; |
842 | } |
843 | |
eb2b4f91 |
844 | // update Kalman with the TRD measurement |
b72f4eaf |
845 | Double_t cov[3]; ptrTracklet->GetCovAt(x, cov); |
846 | Double_t p[2] = { ptrTracklet->GetY(), ptrTracklet->GetZ()}; |
847 | Double_t chi2 = ((AliExternalTrackParam)t).GetPredictedChi2(p, cov); |
848 | if(chi2>1e+10){ // TODO |
eb2b4f91 |
849 | t.SetStatus(AliTRDtrackV1::kChi2, ily); |
850 | continue; |
851 | } |
b72f4eaf |
852 | if(!t.Update(p, cov, chi2)) { |
eb2b4f91 |
853 | n=-1; |
854 | t.SetStatus(AliTRDtrackV1::kUpdate); |
855 | break; |
856 | } |
b72f4eaf |
857 | // fill residuals ?! |
858 | AliTracker::FillResiduals(&t, p, cov, ptrTracklet->GetVolumeId()); |
859 | |
eb2b4f91 |
860 | |
861 | // load tracklet to the tracker |
16cca13f |
862 | ptrTracklet->Update(&t); |
eb2b4f91 |
863 | ptrTracklet = SetTracklet(ptrTracklet); |
864 | t.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); |
865 | n += ptrTracklet->GetN(); |
866 | |
41702fec |
867 | // Reset material budget if 2 consecutive gold |
eb2b4f91 |
868 | // if(ilayer>0 && t.GetTracklet(ilayer-1) && ptrTracklet->GetN() + t.GetTracklet(ilayer-1)->GetN() > 20) t.SetBudget(2, 0.); |
41702fec |
869 | |
870 | // Make backup of the track until is gold |
871 | // TO DO update quality check of the track. |
872 | // consider comparison with fTimeBinsRange |
873 | Float_t ratio0 = ptrTracklet->GetN() / Float_t(fgNTimeBins); |
874 | //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1); |
41702fec |
875 | |
eb2b4f91 |
876 | if( (chi2 < 18.0) && |
41702fec |
877 | (ratio0 > 0.8) && |
878 | //(ratio1 > 0.6) && |
879 | //(ratio0+ratio1 > 1.5) && |
880 | (t.GetNCross() == 0) && |
881 | (TMath::Abs(t.GetSnp()) < 0.85) && |
e3cf3d02 |
882 | (t.GetNumberOfClusters() > 20)){ |
883 | t.MakeBackupTrack(); |
884 | } |
053767a4 |
885 | } // end layers loop |
eb2b4f91 |
886 | //printf("clusters[%d] chi2[%f] x[%f] status[%d ", n, t.GetChi2(), t.GetX(), t.GetStatusTRD()); |
887 | //for(int i=0; i<6; i++) printf("%d ", t.GetStatusTRD(i)); printf("]\n"); |
41702fec |
888 | |
3a039a31 |
889 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
29f95561 |
890 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
891 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
eb2b4f91 |
892 | AliTRDtrackV1 track(t); |
893 | track.SetOwner(); |
41702fec |
894 | cstreamer << "FollowBackProlongation" |
eb2b4f91 |
895 | << "EventNumber=" << eventNumber |
896 | << "ncl=" << n |
897 | << "track.=" << &track |
41702fec |
898 | << "\n"; |
899 | } |
900 | |
eb2b4f91 |
901 | return n; |
0906e73e |
902 | } |
903 | |
eb38ed55 |
904 | //_________________________________________________________________________ |
905 | Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes){ |
41702fec |
906 | // |
907 | // Fits a Riemann-circle to the given points without tilting pad correction. |
908 | // The fit is performed using an instance of the class AliRieman (equations |
909 | // and transformations see documentation of this class) |
910 | // Afterwards all the tracklets are Updated |
911 | // |
912 | // Parameters: - Array of tracklets (AliTRDseedV1) |
913 | // - Storage for the chi2 values (beginning with direction z) |
914 | // - Seeding configuration |
915 | // Output: - The curvature |
916 | // |
917 | AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); |
918 | fitter->Reset(); |
919 | Int_t allplanes[] = {0, 1, 2, 3, 4, 5}; |
920 | Int_t *ppl = &allplanes[0]; |
921 | Int_t maxLayers = 6; |
922 | if(planes){ |
923 | maxLayers = 4; |
924 | ppl = planes; |
925 | } |
926 | for(Int_t il = 0; il < maxLayers; il++){ |
927 | if(!tracklets[ppl[il]].IsOK()) continue; |
e3cf3d02 |
928 | fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfit(0), tracklets[ppl[il]].GetZfit(0),1,10); |
41702fec |
929 | } |
930 | fitter->Update(); |
931 | // Set the reference position of the fit and calculate the chi2 values |
932 | memset(chi2, 0, sizeof(Double_t) * 2); |
933 | for(Int_t il = 0; il < maxLayers; il++){ |
934 | // Reference positions |
935 | tracklets[ppl[il]].Init(fitter); |
936 | |
937 | // chi2 |
938 | if((!tracklets[ppl[il]].IsOK()) && (!planes)) continue; |
939 | chi2[0] += tracklets[ppl[il]].GetChi2Y(); |
940 | chi2[1] += tracklets[ppl[il]].GetChi2Z(); |
941 | } |
942 | return fitter->GetC(); |
eb38ed55 |
943 | } |
944 | |
945 | //_________________________________________________________________________ |
946 | void AliTRDtrackerV1::FitRieman(AliTRDcluster **seedcl, Double_t chi2[2]) |
947 | { |
41702fec |
948 | // |
949 | // Performs a Riemann helix fit using the seedclusters as spacepoints |
950 | // Afterwards the chi2 values are calculated and the seeds are updated |
951 | // |
952 | // Parameters: - The four seedclusters |
953 | // - The tracklet array (AliTRDseedV1) |
954 | // - The seeding configuration |
955 | // - Chi2 array |
956 | // |
957 | // debug level 2 |
958 | // |
959 | AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); |
960 | fitter->Reset(); |
a3743898 |
961 | for(Int_t i = 0; i < 4; i++){ |
a3743898 |
962 | fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1., 10.); |
963 | } |
41702fec |
964 | fitter->Update(); |
965 | |
966 | |
967 | // Update the seed and calculated the chi2 value |
968 | chi2[0] = 0; chi2[1] = 0; |
969 | for(Int_t ipl = 0; ipl < kNSeedPlanes; ipl++){ |
970 | // chi2 |
971 | chi2[0] += (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())); |
972 | chi2[1] += (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())); |
973 | } |
eb38ed55 |
974 | } |
975 | |
976 | |
977 | //_________________________________________________________________________ |
978 | Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex) |
979 | { |
41702fec |
980 | // |
981 | // Fits a helix to the clusters. Pad tilting is considered. As constraint it is |
982 | // assumed that the vertex position is set to 0. |
983 | // This method is very usefull for high-pt particles |
984 | // Basis for the fit: (x - x0)^2 + (y - y0)^2 - R^2 = 0 |
985 | // x0, y0: Center of the circle |
986 | // Measured y-position: ymeas = y - tan(phiT)(zc - zt) |
987 | // zc: center of the pad row |
988 | // Equation which has to be fitted (after transformation): |
989 | // a + b * u + e * v + 2*(ymeas + tan(phiT)(z - zVertex))*t = 0 |
990 | // Transformation: |
991 | // t = 1/(x^2 + y^2) |
992 | // u = 2 * x * t |
993 | // v = 2 * x * tan(phiT) * t |
994 | // Parameters in the equation: |
995 | // a = -1/y0, b = x0/y0, e = dz/dx |
996 | // |
997 | // The Curvature is calculated by the following equation: |
998 | // - curv = a/Sqrt(b^2 + 1) = 1/R |
999 | // Parameters: - the 6 tracklets |
1000 | // - the Vertex constraint |
1001 | // Output: - the Chi2 value of the track |
1002 | // |
1003 | // debug level 5 |
1004 | // |
1005 | |
1006 | TLinearFitter *fitter = GetTiltedRiemanFitterConstraint(); |
1007 | fitter->StoreData(kTRUE); |
1008 | fitter->ClearPoints(); |
1009 | AliTRDcluster *cl = 0x0; |
1010 | |
1011 | Float_t x, y, z, w, t, error, tilt; |
1012 | Double_t uvt[2]; |
1013 | Int_t nPoints = 0; |
053767a4 |
1014 | for(Int_t ilr = 0; ilr < AliTRDgeometry::kNlayer; ilr++){ |
1015 | if(!tracklets[ilr].IsOK()) continue; |
8d2bec9e |
1016 | for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ |
053767a4 |
1017 | if(!tracklets[ilr].IsUsable(itb)) continue; |
1018 | cl = tracklets[ilr].GetClusters(itb); |
1742f24c |
1019 | if(!cl->IsInChamber()) continue; |
41702fec |
1020 | x = cl->GetX(); |
1021 | y = cl->GetY(); |
1022 | z = cl->GetZ(); |
053767a4 |
1023 | tilt = tracklets[ilr].GetTilt(); |
41702fec |
1024 | // Transformation |
1025 | t = 1./(x * x + y * y); |
1026 | uvt[0] = 2. * x * t; |
1027 | uvt[1] = 2. * x * t * tilt ; |
1028 | w = 2. * (y + tilt * (z - zVertex)) * t; |
78b7d24c |
1029 | error = 2. * TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) * t; |
41702fec |
1030 | fitter->AddPoint(uvt, w, error); |
1031 | nPoints++; |
1032 | } |
1033 | } |
1034 | fitter->Eval(); |
1035 | |
1036 | // Calculate curvature |
1037 | Double_t a = fitter->GetParameter(0); |
1038 | Double_t b = fitter->GetParameter(1); |
1039 | Double_t curvature = a/TMath::Sqrt(b*b + 1); |
1040 | |
1041 | Float_t chi2track = fitter->GetChisquare()/Double_t(nPoints); |
1042 | for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++) |
e3cf3d02 |
1043 | tracklets[ip].SetC(curvature); |
41702fec |
1044 | |
3a039a31 |
1045 | /* if(fReconstructor->GetStreamLevel() >= 5){ |
41702fec |
1046 | //Linear Model on z-direction |
1047 | Double_t xref = CalculateReferenceX(tracklets); // Relative to the middle of the stack |
1048 | Double_t slope = fitter->GetParameter(2); |
1049 | Double_t zref = slope * xref; |
1050 | Float_t chi2Z = CalculateChi2Z(tracklets, zref, slope, xref); |
1051 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
1052 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
29f95561 |
1053 | TTreeSRedirector &treeStreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
1054 | treeStreamer << "FitTiltedRiemanConstraint" |
1055 | << "EventNumber=" << eventNumber |
1056 | << "CandidateNumber=" << candidateNumber |
1057 | << "Curvature=" << curvature |
1058 | << "Chi2Track=" << chi2track |
1059 | << "Chi2Z=" << chi2Z |
1060 | << "zref=" << zref |
1061 | << "\n"; |
3a039a31 |
1062 | }*/ |
41702fec |
1063 | return chi2track; |
eb38ed55 |
1064 | } |
1065 | |
1066 | //_________________________________________________________________________ |
1067 | Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError) |
1068 | { |
41702fec |
1069 | // |
1070 | // Performs a Riemann fit taking tilting pad correction into account |
1071 | // The equation of a Riemann circle, where the y position is substituted by the |
1072 | // measured y-position taking pad tilting into account, has to be transformed |
1073 | // into a 4-dimensional hyperplane equation |
1074 | // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 |
1075 | // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) |
1076 | // zc: center of the pad row |
1077 | // zt: z-position of the track |
1078 | // The z-position of the track is assumed to be linear dependent on the x-position |
1079 | // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 |
1080 | // Transformation: u = 2 * x * t |
1081 | // v = 2 * tan(phiT) * t |
1082 | // w = 2 * tan(phiT) * (x - xref) * t |
1083 | // t = 1 / (x^2 + ymeas^2) |
1084 | // Parameters: a = -1/y0 |
1085 | // b = x0/y0 |
1086 | // c = (R^2 -x0^2 - y0^2)/y0 |
1087 | // d = offset |
1088 | // e = dz/dx |
1089 | // If the offset respectively the slope in z-position is impossible, the parameters are fixed using |
1090 | // results from the simple riemann fit. Afterwards the fit is redone. |
1091 | // The curvature is calculated according to the formula: |
1092 | // curv = a/(1 + b^2 + c*a) = 1/R |
1093 | // |
1094 | // Paramters: - Array of tracklets (connected to the track candidate) |
1095 | // - Flag selecting the error definition |
1096 | // Output: - Chi2 values of the track (in Parameter list) |
1097 | // |
1098 | TLinearFitter *fitter = GetTiltedRiemanFitter(); |
1099 | fitter->StoreData(kTRUE); |
1100 | fitter->ClearPoints(); |
1101 | AliTRDLeastSquare zfitter; |
1102 | AliTRDcluster *cl = 0x0; |
1103 | |
1104 | Double_t xref = CalculateReferenceX(tracklets); |
1105 | Double_t x, y, z, t, tilt, dx, w, we; |
1106 | Double_t uvt[4]; |
1107 | Int_t nPoints = 0; |
1108 | // Containers for Least-square fitter |
1109 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1110 | if(!tracklets[ipl].IsOK()) continue; |
ed15ef4f |
1111 | tilt = tracklets[ipl].GetTilt(); |
8d2bec9e |
1112 | for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ |
41702fec |
1113 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1742f24c |
1114 | if(!cl->IsInChamber()) continue; |
41702fec |
1115 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1116 | x = cl->GetX(); |
1117 | y = cl->GetY(); |
1118 | z = cl->GetZ(); |
41702fec |
1119 | dx = x - xref; |
1120 | // Transformation |
1121 | t = 1./(x*x + y*y); |
1122 | uvt[0] = 2. * x * t; |
1123 | uvt[1] = t; |
1124 | uvt[2] = 2. * tilt * t; |
1125 | uvt[3] = 2. * tilt * dx * t; |
1126 | w = 2. * (y + tilt*z) * t; |
1127 | // error definition changes for the different calls |
1128 | we = 2. * t; |
78b7d24c |
1129 | we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) : 0.2; |
41702fec |
1130 | fitter->AddPoint(uvt, w, we); |
1131 | zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); |
1132 | nPoints++; |
1133 | } |
1134 | } |
1135 | fitter->Eval(); |
1136 | zfitter.Eval(); |
1137 | |
1138 | Double_t offset = fitter->GetParameter(3); |
1139 | Double_t slope = fitter->GetParameter(4); |
1140 | |
1141 | // Linear fitter - not possible to make boundaries |
1142 | // Do not accept non possible z and dzdx combinations |
1143 | Bool_t acceptablez = kTRUE; |
1144 | Double_t zref = 0.0; |
1145 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
1146 | if(!tracklets[iLayer].IsOK()) continue; |
1147 | zref = offset + slope * (tracklets[iLayer].GetX0() - xref); |
e3cf3d02 |
1148 | if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) |
41702fec |
1149 | acceptablez = kFALSE; |
1150 | } |
1151 | if (!acceptablez) { |
1152 | Double_t dzmf = zfitter.GetFunctionParameter(1); |
1153 | Double_t zmf = zfitter.GetFunctionValue(&xref); |
1154 | fgTiltedRieman->FixParameter(3, zmf); |
1155 | fgTiltedRieman->FixParameter(4, dzmf); |
1156 | fitter->Eval(); |
1157 | fitter->ReleaseParameter(3); |
1158 | fitter->ReleaseParameter(4); |
1159 | offset = fitter->GetParameter(3); |
1160 | slope = fitter->GetParameter(4); |
1161 | } |
1162 | |
1163 | // Calculate Curvarture |
1164 | Double_t a = fitter->GetParameter(0); |
1165 | Double_t b = fitter->GetParameter(1); |
1166 | Double_t c = fitter->GetParameter(2); |
1167 | Double_t curvature = 1.0 + b*b - c*a; |
1168 | if (curvature > 0.0) |
1169 | curvature = a / TMath::Sqrt(curvature); |
1170 | |
1171 | Double_t chi2track = fitter->GetChisquare()/Double_t(nPoints); |
1172 | |
1173 | // Update the tracklets |
1174 | Double_t dy, dz; |
1175 | for(Int_t iLayer = 0; iLayer < AliTRDtrackerV1::kNPlanes; iLayer++) { |
1176 | |
1177 | x = tracklets[iLayer].GetX0(); |
1178 | y = 0; |
1179 | z = 0; |
1180 | dy = 0; |
1181 | dz = 0; |
1182 | |
1183 | // y: R^2 = (x - x0)^2 + (y - y0)^2 |
1184 | // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) |
1185 | // R = Sqrt() = 1/Curvature |
1186 | // => y = y0 +/- Sqrt(1/Curvature^2 - (x - x0)^2) |
1187 | Double_t res = (x * a + b); // = (x - x0)/y0 |
1188 | res *= res; |
1189 | res = 1.0 - c * a + b * b - res; // = (R^2 - (x - x0)^2)/y0^2 |
1190 | if (res >= 0) { |
1191 | res = TMath::Sqrt(res); |
1192 | y = (1.0 - res) / a; |
1193 | } |
1194 | |
1195 | // dy: R^2 = (x - x0)^2 + (y - y0)^2 |
1196 | // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0 |
1197 | // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) |
1198 | // Curvature: cr = 1/R = a/Sqrt(1 + b^2 - c*a) |
1199 | // => dy/dx = (x - x0)/(1/(cr^2) - (x - x0)^2) |
1200 | Double_t x0 = -b / a; |
1201 | if (-c * a + b * b + 1 > 0) { |
1202 | if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) { |
1203 | Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0)); |
1204 | if (a < 0) yderiv *= -1.0; |
1205 | dy = yderiv; |
1206 | } |
1207 | } |
1208 | z = offset + slope * (x - xref); |
1209 | dz = slope; |
1210 | tracklets[iLayer].SetYref(0, y); |
1211 | tracklets[iLayer].SetYref(1, dy); |
1212 | tracklets[iLayer].SetZref(0, z); |
1213 | tracklets[iLayer].SetZref(1, dz); |
1214 | tracklets[iLayer].SetC(curvature); |
1215 | tracklets[iLayer].SetChi2(chi2track); |
1216 | } |
1217 | |
3a039a31 |
1218 | /* if(fReconstructor->GetStreamLevel() >=5){ |
29f95561 |
1219 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
1220 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
1221 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
1222 | Double_t chi2z = CalculateChi2Z(tracklets, offset, slope, xref); |
1223 | cstreamer << "FitTiltedRieman0" |
1224 | << "EventNumber=" << eventNumber |
1225 | << "CandidateNumber=" << candidateNumber |
1226 | << "xref=" << xref |
1227 | << "Chi2Z=" << chi2z |
1228 | << "\n"; |
3a039a31 |
1229 | }*/ |
41702fec |
1230 | return chi2track; |
eb38ed55 |
1231 | } |
1232 | |
3b57a3f7 |
1233 | |
9e333711 |
1234 | //____________________________________________________________________ |
6e4d4425 |
1235 | Double_t AliTRDtrackerV1::FitLine(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t err, Int_t np, AliTrackPoint *points) |
9e333711 |
1236 | { |
1237 | AliTRDLeastSquare yfitter, zfitter; |
1238 | AliTRDcluster *cl = 0x0; |
1239 | |
1240 | AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; |
1241 | if(!tracklets){ |
1242 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1243 | if(!(tracklet = track->GetTracklet(ipl))) continue; |
1244 | if(!tracklet->IsOK()) continue; |
1245 | new(&work[ipl]) AliTRDseedV1(*tracklet); |
1246 | } |
1247 | tracklets = &work[0]; |
1248 | } |
1249 | |
1250 | Double_t xref = CalculateReferenceX(tracklets); |
1251 | Double_t x, y, z, dx, ye, yr, tilt; |
1252 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1253 | if(!tracklets[ipl].IsOK()) continue; |
1254 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ |
1255 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1256 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1257 | x = cl->GetX(); |
1258 | z = cl->GetZ(); |
1259 | dx = x - xref; |
1260 | zfitter.AddPoint(&dx, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); |
1261 | } |
1262 | } |
1263 | zfitter.Eval(); |
1264 | Double_t z0 = zfitter.GetFunctionParameter(0); |
1265 | Double_t dzdx = zfitter.GetFunctionParameter(1); |
1266 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1267 | if(!tracklets[ipl].IsOK()) continue; |
1268 | for(Int_t itb = 0; itb < fgNTimeBins; itb++){ |
1269 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1270 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1271 | x = cl->GetX(); |
1272 | y = cl->GetY(); |
1273 | z = cl->GetZ(); |
1274 | tilt = tracklets[ipl].GetTilt(); |
1275 | dx = x - xref; |
1276 | yr = y + tilt*(z - z0 - dzdx*dx); |
1277 | // error definition changes for the different calls |
1278 | ye = tilt*TMath::Sqrt(cl->GetSigmaZ2()); |
1279 | ye += err ? tracklets[ipl].GetSigmaY() : 0.2; |
1280 | yfitter.AddPoint(&dx, yr, ye); |
1281 | } |
1282 | } |
1283 | yfitter.Eval(); |
1284 | Double_t y0 = yfitter.GetFunctionParameter(0); |
1285 | Double_t dydx = yfitter.GetFunctionParameter(1); |
1286 | Double_t chi2 = 0.;//yfitter.GetChisquare()/Double_t(nPoints); |
1287 | |
1288 | //update track points array |
1289 | if(np && points){ |
1290 | Float_t xyz[3]; |
1291 | for(int ip=0; ip<np; ip++){ |
1292 | points[ip].GetXYZ(xyz); |
1293 | xyz[1] = y0 + dydx * (xyz[0] - xref); |
1294 | xyz[2] = z0 + dzdx * (xyz[0] - xref); |
1295 | points[ip].SetXYZ(xyz); |
1296 | } |
1297 | } |
1298 | return chi2; |
1299 | } |
1300 | |
1301 | |
3b57a3f7 |
1302 | //_________________________________________________________________________ |
6e4d4425 |
1303 | Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t sigError, Int_t np, AliTrackPoint *points) |
3b57a3f7 |
1304 | { |
41702fec |
1305 | // |
1306 | // Performs a Riemann fit taking tilting pad correction into account |
1307 | // The equation of a Riemann circle, where the y position is substituted by the |
1308 | // measured y-position taking pad tilting into account, has to be transformed |
1309 | // into a 4-dimensional hyperplane equation |
1310 | // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 |
1311 | // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) |
1312 | // zc: center of the pad row |
1313 | // zt: z-position of the track |
1314 | // The z-position of the track is assumed to be linear dependent on the x-position |
1315 | // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 |
1316 | // Transformation: u = 2 * x * t |
1317 | // v = 2 * tan(phiT) * t |
1318 | // w = 2 * tan(phiT) * (x - xref) * t |
1319 | // t = 1 / (x^2 + ymeas^2) |
1320 | // Parameters: a = -1/y0 |
1321 | // b = x0/y0 |
1322 | // c = (R^2 -x0^2 - y0^2)/y0 |
1323 | // d = offset |
1324 | // e = dz/dx |
1325 | // If the offset respectively the slope in z-position is impossible, the parameters are fixed using |
1326 | // results from the simple riemann fit. Afterwards the fit is redone. |
1327 | // The curvature is calculated according to the formula: |
1328 | // curv = a/(1 + b^2 + c*a) = 1/R |
1329 | // |
1330 | // Paramters: - Array of tracklets (connected to the track candidate) |
1331 | // - Flag selecting the error definition |
1332 | // Output: - Chi2 values of the track (in Parameter list) |
1333 | // |
1334 | TLinearFitter *fitter = GetTiltedRiemanFitter(); |
1335 | fitter->StoreData(kTRUE); |
1336 | fitter->ClearPoints(); |
1337 | AliTRDLeastSquare zfitter; |
1338 | AliTRDcluster *cl = 0x0; |
3b57a3f7 |
1339 | |
1340 | AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; |
1341 | if(!tracklets){ |
1342 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1343 | if(!(tracklet = track->GetTracklet(ipl))) continue; |
1344 | if(!tracklet->IsOK()) continue; |
1345 | new(&work[ipl]) AliTRDseedV1(*tracklet); |
1346 | } |
1347 | tracklets = &work[0]; |
1348 | } |
1349 | |
41702fec |
1350 | Double_t xref = CalculateReferenceX(tracklets); |
1351 | Double_t x, y, z, t, tilt, dx, w, we; |
1352 | Double_t uvt[4]; |
1353 | Int_t nPoints = 0; |
1354 | // Containers for Least-square fitter |
1355 | for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ |
1356 | if(!tracklets[ipl].IsOK()) continue; |
8d2bec9e |
1357 | for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ |
41702fec |
1358 | if(!(cl = tracklets[ipl].GetClusters(itb))) continue; |
1359 | if (!tracklets[ipl].IsUsable(itb)) continue; |
1360 | x = cl->GetX(); |
1361 | y = cl->GetY(); |
1362 | z = cl->GetZ(); |
1363 | tilt = tracklets[ipl].GetTilt(); |
1364 | dx = x - xref; |
1365 | // Transformation |
1366 | t = 1./(x*x + y*y); |
1367 | uvt[0] = 2. * x * t; |
1368 | uvt[1] = t; |
1369 | uvt[2] = 2. * tilt * t; |
1370 | uvt[3] = 2. * tilt * dx * t; |
1371 | w = 2. * (y + tilt*z) * t; |
1372 | // error definition changes for the different calls |
1373 | we = 2. * t; |
f29f13a6 |
1374 | we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()) : 0.2; |
41702fec |
1375 | fitter->AddPoint(uvt, w, we); |
1376 | zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2()))); |
1377 | nPoints++; |
1378 | } |
1379 | } |
aec26713 |
1380 | if(fitter->Eval()) return 1.E10; |
1381 | |
41702fec |
1382 | Double_t z0 = fitter->GetParameter(3); |
1383 | Double_t dzdx = fitter->GetParameter(4); |
3b57a3f7 |
1384 | |
1385 | |
1386 | // Linear fitter - not possible to make boundaries |
1387 | // Do not accept non possible z and dzdx combinations |
1388 | Bool_t accept = kTRUE; |
1389 | Double_t zref = 0.0; |
1390 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
1391 | if(!tracklets[iLayer].IsOK()) continue; |
1392 | zref = z0 + dzdx * (tracklets[iLayer].GetX0() - xref); |
e3cf3d02 |
1393 | if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) |
3b57a3f7 |
1394 | accept = kFALSE; |
1395 | } |
1396 | if (!accept) { |
41702fec |
1397 | zfitter.Eval(); |
3b57a3f7 |
1398 | Double_t dzmf = zfitter.GetFunctionParameter(1); |
1399 | Double_t zmf = zfitter.GetFunctionValue(&xref); |
1400 | fitter->FixParameter(3, zmf); |
1401 | fitter->FixParameter(4, dzmf); |
1402 | fitter->Eval(); |
1403 | fitter->ReleaseParameter(3); |
1404 | fitter->ReleaseParameter(4); |
1405 | z0 = fitter->GetParameter(3); // = zmf ? |
1406 | dzdx = fitter->GetParameter(4); // = dzmf ? |
1407 | } |
1408 | |
1409 | // Calculate Curvature |
1410 | Double_t a = fitter->GetParameter(0); |
1411 | Double_t b = fitter->GetParameter(1); |
1412 | Double_t c = fitter->GetParameter(2); |
1413 | Double_t y0 = 1. / a; |
1414 | Double_t x0 = -b * y0; |
a015e406 |
1415 | Double_t tmp = y0*y0 + x0*x0 - c*y0; |
1416 | if(tmp<=0.) return 1.E10; |
1417 | Double_t R = TMath::Sqrt(tmp); |
3b57a3f7 |
1418 | Double_t C = 1.0 + b*b - c*a; |
1419 | if (C > 0.0) C = a / TMath::Sqrt(C); |
1420 | |
1421 | // Calculate chi2 of the fit |
1422 | Double_t chi2 = fitter->GetChisquare()/Double_t(nPoints); |
1423 | |
1424 | // Update the tracklets |
1425 | if(!track){ |
1426 | for(Int_t ip = 0; ip < kNPlanes; ip++) { |
1427 | x = tracklets[ip].GetX0(); |
90cf7133 |
1428 | tmp = R*R-(x-x0)*(x-x0); |
a015e406 |
1429 | if(tmp <= 0.) continue; |
1430 | tmp = TMath::Sqrt(tmp); |
3b57a3f7 |
1431 | |
1432 | // y: R^2 = (x - x0)^2 + (y - y0)^2 |
1433 | // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) |
1434 | tracklets[ip].SetYref(0, y0 - (y0>0.?1.:-1)*tmp); |
1435 | // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) |
1436 | tracklets[ip].SetYref(1, (x - x0) / tmp); |
1437 | tracklets[ip].SetZref(0, z0 + dzdx * (x - xref)); |
1438 | tracklets[ip].SetZref(1, dzdx); |
1439 | tracklets[ip].SetC(C); |
1440 | tracklets[ip].SetChi2(chi2); |
1441 | } |
1442 | } |
3b57a3f7 |
1443 | //update track points array |
1444 | if(np && points){ |
1445 | Float_t xyz[3]; |
1446 | for(int ip=0; ip<np; ip++){ |
1447 | points[ip].GetXYZ(xyz); |
60e55aee |
1448 | 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 |
1449 | xyz[2] = z0 + dzdx * (xyz[0] - xref); |
1450 | points[ip].SetXYZ(xyz); |
1451 | } |
1452 | } |
1453 | |
3b57a3f7 |
1454 | return chi2; |
1455 | } |
1456 | |
1457 | |
1bf51039 |
1458 | //____________________________________________________________________ |
1459 | Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t up, Int_t np, AliTrackPoint *points) |
1460 | { |
1461 | // Kalman filter implementation for the TRD. |
1462 | // It returns the positions of the fit in the array "points" |
1463 | // |
1464 | // Author : A.Bercuci@gsi.de |
1465 | |
3cfaffa4 |
1466 | // printf("Start track @ x[%f]\n", track->GetX()); |
1bf51039 |
1467 | |
1468 | //prepare marker points along the track |
1469 | Int_t ip = np ? 0 : 1; |
1470 | while(ip<np){ |
1471 | if((up?-1:1) * (track->GetX() - points[ip].GetX()) > 0.) break; |
1472 | //printf("AliTRDtrackerV1::FitKalman() : Skip track marker x[%d] = %7.3f. Before track start ( %7.3f ).\n", ip, points[ip].GetX(), track->GetX()); |
1473 | ip++; |
1474 | } |
1475 | //if(points) printf("First marker point @ x[%d] = %f\n", ip, points[ip].GetX()); |
1476 | |
1477 | |
1478 | AliTRDseedV1 tracklet, *ptrTracklet = 0x0; |
1479 | |
1480 | //Loop through the TRD planes |
1481 | for (Int_t jplane = 0; jplane < kNPlanes; jplane++) { |
1482 | // GET TRACKLET OR BUILT IT |
1483 | Int_t iplane = up ? jplane : kNPlanes - 1 - jplane; |
1484 | if(tracklets){ |
1485 | if(!(ptrTracklet = &tracklets[iplane])) continue; |
1486 | }else{ |
1487 | if(!(ptrTracklet = track->GetTracklet(iplane))){ |
1488 | /*AliTRDtrackerV1 *tracker = 0x0; |
1489 | if(!(tracker = dynamic_cast<AliTRDtrackerV1*>( AliTRDReconstructor::Tracker()))) continue; |
1490 | ptrTracklet = new(&tracklet) AliTRDseedV1(iplane); |
1491 | if(!tracker->MakeTracklet(ptrTracklet, track)) */ |
1492 | continue; |
1493 | } |
1494 | } |
1495 | if(!ptrTracklet->IsOK()) continue; |
1496 | |
1497 | Double_t x = ptrTracklet->GetX0(); |
1498 | |
1499 | while(ip < np){ |
1500 | //don't do anything if next marker is after next update point. |
1501 | if((up?-1:1) * (points[ip].GetX() - x) - fgkMaxStep < 0) break; |
1bf51039 |
1502 | if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; |
1503 | |
1504 | Double_t xyz[3]; // should also get the covariance |
3cfaffa4 |
1505 | track->GetXYZ(xyz); |
1506 | track->Global2LocalPosition(xyz, track->GetAlpha()); |
1507 | points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]); |
1bf51039 |
1508 | ip++; |
1509 | } |
3cfaffa4 |
1510 | // printf("plane[%d] tracklet[%p] x[%f]\n", iplane, ptrTracklet, x); |
1bf51039 |
1511 | |
3cfaffa4 |
1512 | // Propagate closer to the next update point |
1bf51039 |
1513 | if(((up?-1:1) * (x - track->GetX()) + fgkMaxStep < 0) && !PropagateToX(*track, x + (up?-1:1)*fgkMaxStep, fgkMaxStep)) return -1.; |
1514 | |
1515 | if(!AdjustSector(track)) return -1; |
1516 | if(TMath::Abs(track->GetSnp()) > fgkMaxSnp) return -1; |
1517 | |
1518 | //load tracklet to the tracker and the track |
1519 | /* Int_t index; |
1520 | if((index = FindTracklet(ptrTracklet)) < 0){ |
1521 | ptrTracklet = SetTracklet(&tracklet); |
1522 | index = fTracklets->GetEntriesFast()-1; |
1523 | } |
1524 | track->SetTracklet(ptrTracklet, index);*/ |
1525 | |
1526 | |
1527 | // register tracklet to track with tracklet creation !! |
1528 | // PropagateBack : loaded tracklet to the tracker and update index |
1529 | // RefitInward : update index |
1530 | // MakeTrack : loaded tracklet to the tracker and update index |
1531 | if(!tracklets) track->SetTracklet(ptrTracklet, -1); |
1532 | |
1533 | |
1534 | //Calculate the mean material budget along the path inside the chamber |
1535 | Double_t xyz0[3]; track->GetXYZ(xyz0); |
1536 | Double_t alpha = track->GetAlpha(); |
1537 | Double_t xyz1[3], y, z; |
1538 | if(!track->GetProlongation(x, y, z)) return -1; |
1539 | xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); |
1540 | xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha); |
1541 | xyz1[2] = z; |
3cfaffa4 |
1542 | 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 |
1543 | Double_t param[7]; |
3cfaffa4 |
1544 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param) <=0.) break; |
1bf51039 |
1545 | Double_t xrho = param[0]*param[4]; // density*length |
1546 | Double_t xx0 = param[1]; // radiation length |
1547 | |
1548 | //Propagate the track |
1549 | track->PropagateTo(x, xx0, xrho); |
1550 | if (!AdjustSector(track)) break; |
1551 | |
1552 | //Update track |
b72f4eaf |
1553 | Double_t cov[3]; ptrTracklet->GetCovAt(x, cov); |
1554 | Double_t p[2] = { ptrTracklet->GetY(), ptrTracklet->GetZ()}; |
1555 | Double_t chi2 = ((AliExternalTrackParam*)track)->GetPredictedChi2(p, cov); |
1556 | if(chi2<1e+10) track->Update(p, cov, chi2); |
1bf51039 |
1557 | if(!up) continue; |
1558 | |
1559 | //Reset material budget if 2 consecutive gold |
1560 | if(iplane>0 && track->GetTracklet(iplane-1) && ptrTracklet->GetN() + track->GetTracklet(iplane-1)->GetN() > 20) track->SetBudget(2, 0.); |
1561 | } // end planes loop |
1562 | |
1563 | // extrapolation |
1564 | while(ip < np){ |
1565 | if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; |
1566 | |
1567 | Double_t xyz[3]; // should also get the covariance |
3cfaffa4 |
1568 | track->GetXYZ(xyz); |
1569 | track->Global2LocalPosition(xyz, track->GetAlpha()); |
1570 | points[ip].SetXYZ(xyz[0], xyz[1], xyz[2]); |
1bf51039 |
1571 | ip++; |
1572 | } |
1573 | |
1574 | return track->GetChi2(); |
1575 | } |
3b57a3f7 |
1576 | |
eb38ed55 |
1577 | //_________________________________________________________________________ |
bb56afff |
1578 | Float_t AliTRDtrackerV1::CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref) |
eb38ed55 |
1579 | { |
41702fec |
1580 | // |
1581 | // Calculates the chi2-value of the track in z-Direction including tilting pad correction. |
1582 | // A linear dependence on the x-value serves as a model. |
1583 | // The parameters are related to the tilted Riemann fit. |
1584 | // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate |
1585 | // - the offset for the reference x |
1586 | // - the slope |
1587 | // - the reference x position |
1588 | // Output: - The Chi2 value of the track in z-Direction |
1589 | // |
1590 | Float_t chi2Z = 0, nLayers = 0; |
053767a4 |
1591 | for (Int_t iLayer = 0; iLayer < AliTRDgeometry::kNlayer; iLayer++) { |
41702fec |
1592 | if(!tracklets[iLayer].IsOK()) continue; |
1593 | Double_t z = offset + slope * (tracklets[iLayer].GetX0() - xref); |
e3cf3d02 |
1594 | chi2Z += TMath::Abs(tracklets[iLayer].GetZfit(0) - z); |
41702fec |
1595 | nLayers++; |
1596 | } |
1597 | chi2Z /= TMath::Max((nLayers - 3.0),1.0); |
1598 | return chi2Z; |
eb38ed55 |
1599 | } |
1600 | |
bccda319 |
1601 | //_____________________________________________________________________________ |
1602 | Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep) |
1603 | { |
41702fec |
1604 | // |
1605 | // Starting from current X-position of track <t> this function |
1606 | // extrapolates the track up to radial position <xToGo>. |
1607 | // Returns 1 if track reaches the plane, and 0 otherwise |
1608 | // |
bccda319 |
1609 | |
41702fec |
1610 | const Double_t kEpsilon = 0.00001; |
bccda319 |
1611 | |
41702fec |
1612 | // Current track X-position |
1613 | Double_t xpos = t.GetX(); |
bccda319 |
1614 | |
41702fec |
1615 | // Direction: inward or outward |
1616 | Double_t dir = (xpos < xToGo) ? 1.0 : -1.0; |
bccda319 |
1617 | |
41702fec |
1618 | while (((xToGo - xpos) * dir) > kEpsilon) { |
bccda319 |
1619 | |
41702fec |
1620 | Double_t xyz0[3]; |
1621 | Double_t xyz1[3]; |
1622 | Double_t param[7]; |
1623 | Double_t x; |
1624 | Double_t y; |
1625 | Double_t z; |
bccda319 |
1626 | |
41702fec |
1627 | // The next step size |
1628 | Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep); |
bccda319 |
1629 | |
41702fec |
1630 | // Get the global position of the starting point |
1631 | t.GetXYZ(xyz0); |
bccda319 |
1632 | |
41702fec |
1633 | // X-position after next step |
1634 | x = xpos + step; |
bccda319 |
1635 | |
41702fec |
1636 | // Get local Y and Z at the X-position of the next step |
3352b455 |
1637 | if(t.GetProlongation(x,y,z)<0) return 0; // No prolongation possible |
bccda319 |
1638 | |
41702fec |
1639 | // The global position of the end point of this prolongation step |
1640 | xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha()); |
1641 | xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha()); |
1642 | xyz1[2] = z; |
bccda319 |
1643 | |
41702fec |
1644 | // Calculate the mean material budget between start and |
1645 | // end point of this prolongation step |
83dea92e |
1646 | if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return 0; |
bccda319 |
1647 | |
41702fec |
1648 | // Propagate the track to the X-position after the next step |
9c87a076 |
1649 | if (!t.PropagateTo(x, param[1], param[0]*param[4])) return 0; |
bccda319 |
1650 | |
41702fec |
1651 | // Rotate the track if necessary |
1652 | AdjustSector(&t); |
bccda319 |
1653 | |
41702fec |
1654 | // New track X-position |
1655 | xpos = t.GetX(); |
bccda319 |
1656 | |
41702fec |
1657 | } |
bccda319 |
1658 | |
41702fec |
1659 | return 1; |
bccda319 |
1660 | |
1661 | } |
1662 | |
eb38ed55 |
1663 | |
1664 | //_____________________________________________________________________________ |
1665 | Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) const |
1666 | { |
41702fec |
1667 | // |
1668 | // Reads AliTRDclusters from the file. |
1669 | // The names of the cluster tree and branches |
1670 | // should match the ones used in AliTRDclusterizer::WriteClusters() |
1671 | // |
1672 | |
1673 | Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster))); |
1674 | TObjArray *clusterArray = new TObjArray(nsize+1000); |
1675 | |
1676 | TBranch *branch = clusterTree->GetBranch("TRDcluster"); |
1677 | if (!branch) { |
1678 | AliError("Can't get the branch !"); |
1679 | return 1; |
1680 | } |
1681 | branch->SetAddress(&clusterArray); |
1682 | |
1683 | if(!fClusters){ |
8ae98148 |
1684 | Float_t nclusters = fReconstructor->GetRecoParam()->GetNClusters(); |
1685 | if(fReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; |
1686 | array = new TClonesArray("AliTRDcluster", Int_t(nclusters)); |
41702fec |
1687 | array->SetOwner(kTRUE); |
1688 | } |
1689 | |
1690 | // Loop through all entries in the tree |
1691 | Int_t nEntries = (Int_t) clusterTree->GetEntries(); |
1692 | Int_t nbytes = 0; |
1693 | Int_t ncl = 0; |
1694 | AliTRDcluster *c = 0x0; |
1695 | for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) { |
1696 | // Import the tree |
1697 | nbytes += clusterTree->GetEvent(iEntry); |
1698 | |
1699 | // Get the number of points in the detector |
1700 | Int_t nCluster = clusterArray->GetEntriesFast(); |
1701 | for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) { |
1702 | if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue; |
41702fec |
1703 | new((*fClusters)[ncl++]) AliTRDcluster(*c); |
1704 | delete (clusterArray->RemoveAt(iCluster)); |
1705 | } |
1706 | |
1707 | } |
1708 | delete clusterArray; |
1709 | |
1710 | return 0; |
eb38ed55 |
1711 | } |
1712 | |
1713 | //_____________________________________________________________________________ |
1714 | Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree) |
1715 | { |
41702fec |
1716 | // |
66f6bfd9 |
1717 | // Fills clusters into TRD tracking sectors |
41702fec |
1718 | // |
41702fec |
1719 | |
48f8adf3 |
1720 | if(!fReconstructor->IsWritingClusters()){ |
1721 | fClusters = AliTRDReconstructor::GetClusters(); |
1722 | } else { |
66f6bfd9 |
1723 | if (ReadClusters(fClusters, cTree)) { |
1724 | AliError("Problem with reading the clusters !"); |
1725 | return 1; |
1726 | } |
1727 | } |
1728 | SetClustersOwner(); |
1729 | |
48f8adf3 |
1730 | if(!fClusters || !fClusters->GetEntriesFast()){ |
66f6bfd9 |
1731 | AliInfo("No TRD clusters"); |
41702fec |
1732 | return 1; |
1733 | } |
66f6bfd9 |
1734 | |
1735 | //Int_t nin = |
1736 | BuildTrackingContainers(); |
1737 | |
1738 | //Int_t ncl = fClusters->GetEntriesFast(); |
1739 | //AliInfo(Form("Clusters %d [%6.2f %% in the active volume]", ncl, 100.*float(nin)/ncl)); |
1740 | |
1741 | return 0; |
1742 | } |
1743 | |
1744 | //_____________________________________________________________________________ |
1745 | Int_t AliTRDtrackerV1::LoadClusters(TClonesArray *clusters) |
1746 | { |
1747 | // |
1748 | // Fills clusters into TRD tracking sectors |
1749 | // Function for use in the HLT |
1750 | |
1751 | if(!clusters || !clusters->GetEntriesFast()){ |
1752 | AliInfo("No TRD clusters"); |
41702fec |
1753 | return 1; |
1754 | } |
1755 | |
66f6bfd9 |
1756 | fClusters = clusters; |
1757 | SetClustersOwner(); |
1758 | |
1759 | //Int_t nin = |
1760 | BuildTrackingContainers(); |
1761 | |
1762 | //Int_t ncl = fClusters->GetEntriesFast(); |
1763 | //AliInfo(Form("Clusters %d [%6.2f %% in the active volume]", ncl, 100.*float(nin)/ncl)); |
1764 | |
1765 | return 0; |
1766 | } |
1767 | |
1768 | |
1769 | //____________________________________________________________________ |
1770 | Int_t AliTRDtrackerV1::BuildTrackingContainers() |
1771 | { |
1772 | // Building tracking containers for clusters |
1773 | |
1774 | Int_t nin =0, icl = fClusters->GetEntriesFast(); |
41702fec |
1775 | while (icl--) { |
1776 | AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(icl); |
1777 | if(c->IsInChamber()) nin++; |
1778 | Int_t detector = c->GetDetector(); |
1779 | Int_t sector = fGeom->GetSector(detector); |
053767a4 |
1780 | Int_t stack = fGeom->GetStack(detector); |
1781 | Int_t layer = fGeom->GetLayer(detector); |
41702fec |
1782 | |
053767a4 |
1783 | fTrSec[sector].GetChamber(stack, layer, kTRUE)->InsertCluster(c, icl); |
41702fec |
1784 | } |
b0a48c4d |
1785 | |
1786 | const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); |
053767a4 |
1787 | for(int isector =0; isector<AliTRDgeometry::kNsector; isector++){ |
41702fec |
1788 | if(!fTrSec[isector].GetNChambers()) continue; |
b0a48c4d |
1789 | fTrSec[isector].Init(fReconstructor, cal); |
41702fec |
1790 | } |
66f6bfd9 |
1791 | |
1792 | return nin; |
eb38ed55 |
1793 | } |
1794 | |
1795 | |
66f6bfd9 |
1796 | |
0906e73e |
1797 | //____________________________________________________________________ |
172b6f82 |
1798 | void AliTRDtrackerV1::UnloadClusters() |
0906e73e |
1799 | { |
d4cf71ca |
1800 | // |
1801 | // Clears the arrays of clusters and tracks. Resets sectors and timebins |
1802 | // If option "force" is also set the containers are also deleted. This is useful |
1803 | // in case of HLT |
1804 | |
1805 | if(fTracks){ |
1806 | fTracks->Delete(); |
172b6f82 |
1807 | if(HasRemoveContainers()){delete fTracks; fTracks = 0x0;} |
d4cf71ca |
1808 | } |
1809 | if(fTracklets){ |
1810 | fTracklets->Delete(); |
172b6f82 |
1811 | if(HasRemoveContainers()){delete fTracklets; fTracklets = 0x0;} |
d4cf71ca |
1812 | } |
48f8adf3 |
1813 | if(fClusters){ |
1814 | if(IsClustersOwner()) fClusters->Delete(); |
1815 | |
1816 | // save clusters array in the reconstructor for further use. |
1817 | if(!fReconstructor->IsWritingClusters()){ |
1818 | AliTRDReconstructor::SetClusters(fClusters); |
1819 | SetClustersOwner(kFALSE); |
1820 | } else AliTRDReconstructor::SetClusters(0x0); |
1821 | } |
0906e73e |
1822 | |
053767a4 |
1823 | for (int i = 0; i < AliTRDgeometry::kNsector; i++) fTrSec[i].Clear(); |
0906e73e |
1824 | |
41702fec |
1825 | // Increment the Event Number |
1826 | AliTRDtrackerDebug::SetEventNumber(AliTRDtrackerDebug::GetEventNumber() + 1); |
eb38ed55 |
1827 | } |
0906e73e |
1828 | |
fac58f00 |
1829 | // //____________________________________________________________________ |
1830 | // void AliTRDtrackerV1::UseClusters(const AliKalmanTrack *t, Int_t) const |
1831 | // { |
1832 | // const AliTRDtrackV1 *track = dynamic_cast<const AliTRDtrackV1*>(t); |
1833 | // if(!track) return; |
1834 | // |
1835 | // AliTRDseedV1 *tracklet = 0x0; |
1836 | // for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){ |
1837 | // if(!(tracklet = track->GetTracklet(ily))) continue; |
1838 | // AliTRDcluster *c = 0x0; |
8d2bec9e |
1839 | // for(Int_t ic=AliTRDseed::kNclusters; ic--;){ |
fac58f00 |
1840 | // if(!(c=tracklet->GetClusters(ic))) continue; |
1841 | // c->Use(); |
1842 | // } |
1843 | // } |
1844 | // } |
1845 | // |
b1957d3c |
1846 | |
eb38ed55 |
1847 | //_____________________________________________________________________________ |
1848 | Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track) |
1849 | { |
41702fec |
1850 | // |
1851 | // Rotates the track when necessary |
1852 | // |
1853 | |
1854 | Double_t alpha = AliTRDgeometry::GetAlpha(); |
1855 | Double_t y = track->GetY(); |
1856 | Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha); |
3cfaffa4 |
1857 | |
41702fec |
1858 | if (y > ymax) { |
1859 | if (!track->Rotate( alpha)) { |
1860 | return kFALSE; |
1861 | } |
1862 | } |
1863 | else if (y < -ymax) { |
1864 | if (!track->Rotate(-alpha)) { |
1865 | return kFALSE; |
1866 | } |
1867 | } |
1868 | |
1869 | return kTRUE; |
0906e73e |
1870 | |
1871 | } |
1872 | |
eb38ed55 |
1873 | |
0906e73e |
1874 | //____________________________________________________________________ |
1875 | AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *track, Int_t p, Int_t &idx) |
1876 | { |
41702fec |
1877 | // Find tracklet for TRD track <track> |
1878 | // Parameters |
1879 | // - track |
1880 | // - sector |
1881 | // - plane |
1882 | // - index |
1883 | // Output |
1884 | // tracklet |
1885 | // index |
1886 | // Detailed description |
1887 | // |
1888 | idx = track->GetTrackletIndex(p); |
1889 | AliTRDseedV1 *tracklet = (idx==0xffff) ? 0x0 : (AliTRDseedV1*)fTracklets->UncheckedAt(idx); |
1890 | |
1891 | return tracklet; |
0906e73e |
1892 | } |
1893 | |
1894 | //____________________________________________________________________ |
3b57a3f7 |
1895 | AliTRDseedV1* AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet) |
0906e73e |
1896 | { |
41702fec |
1897 | // Add this tracklet to the list of tracklets stored in the tracker |
1898 | // |
1899 | // Parameters |
1900 | // - tracklet : pointer to the tracklet to be added to the list |
1901 | // |
1902 | // Output |
1903 | // - the index of the new tracklet in the tracker tracklets list |
1904 | // |
1905 | // Detailed description |
1906 | // Build the tracklets list if it is not yet created (late initialization) |
1907 | // and adds the new tracklet to the list. |
1908 | // |
1909 | if(!fTracklets){ |
053767a4 |
1910 | fTracklets = new TClonesArray("AliTRDseedV1", AliTRDgeometry::Nsector()*kMaxTracksStack); |
41702fec |
1911 | fTracklets->SetOwner(kTRUE); |
1912 | } |
1913 | Int_t nentries = fTracklets->GetEntriesFast(); |
1914 | return new ((*fTracklets)[nentries]) AliTRDseedV1(*tracklet); |
972ef65e |
1915 | } |
1916 | |
d20df6fc |
1917 | //____________________________________________________________________ |
1918 | AliTRDtrackV1* AliTRDtrackerV1::SetTrack(AliTRDtrackV1 *track) |
1919 | { |
1920 | // Add this track to the list of tracks stored in the tracker |
1921 | // |
1922 | // Parameters |
1923 | // - track : pointer to the track to be added to the list |
1924 | // |
1925 | // Output |
1926 | // - the pointer added |
1927 | // |
1928 | // Detailed description |
1929 | // Build the tracks list if it is not yet created (late initialization) |
1930 | // and adds the new track to the list. |
1931 | // |
1932 | if(!fTracks){ |
053767a4 |
1933 | fTracks = new TClonesArray("AliTRDtrackV1", AliTRDgeometry::Nsector()*kMaxTracksStack); |
d20df6fc |
1934 | fTracks->SetOwner(kTRUE); |
1935 | } |
1936 | Int_t nentries = fTracks->GetEntriesFast(); |
1937 | return new ((*fTracks)[nentries]) AliTRDtrackV1(*track); |
1938 | } |
1939 | |
1940 | |
0906e73e |
1941 | |
e4f2f73d |
1942 | //____________________________________________________________________ |
eb38ed55 |
1943 | Int_t AliTRDtrackerV1::Clusters2TracksSM(Int_t sector, AliESDEvent *esd) |
e4f2f73d |
1944 | { |
41702fec |
1945 | // |
1946 | // Steer tracking for one SM. |
1947 | // |
1948 | // Parameters : |
1949 | // sector : Array of (SM) propagation layers containing clusters |
1950 | // esd : The current ESD event. On output it contains the also |
1951 | // the ESD (TRD) tracks found in this SM. |
1952 | // |
1953 | // Output : |
1954 | // Number of tracks found in this TRD supermodule. |
1955 | // |
1956 | // Detailed description |
1957 | // |
1958 | // 1. Unpack AliTRDpropagationLayers objects for each stack. |
1959 | // 2. Launch stack tracking. |
1960 | // See AliTRDtrackerV1::Clusters2TracksStack() for details. |
1961 | // 3. Pack results in the ESD event. |
1962 | // |
1963 | |
1964 | // allocate space for esd tracks in this SM |
1965 | TClonesArray esdTrackList("AliESDtrack", 2*kMaxTracksStack); |
1966 | esdTrackList.SetOwner(); |
1967 | |
1968 | Int_t nTracks = 0; |
1969 | Int_t nChambers = 0; |
1970 | AliTRDtrackingChamber **stack = 0x0, *chamber = 0x0; |
053767a4 |
1971 | for(int istack = 0; istack<AliTRDgeometry::kNstack; istack++){ |
41702fec |
1972 | if(!(stack = fTrSec[sector].GetStack(istack))) continue; |
1973 | nChambers = 0; |
053767a4 |
1974 | for(int ilayer=0; ilayer<AliTRDgeometry::kNlayer; ilayer++){ |
1975 | if(!(chamber = stack[ilayer])) continue; |
3a039a31 |
1976 | if(chamber->GetNClusters() < fgNTimeBins * fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; |
41702fec |
1977 | nChambers++; |
053767a4 |
1978 | //AliInfo(Form("sector %d stack %d layer %d clusters %d", sector, istack, ilayer, chamber->GetNClusters())); |
41702fec |
1979 | } |
1980 | if(nChambers < 4) continue; |
1981 | //AliInfo(Form("Doing stack %d", istack)); |
1982 | nTracks += Clusters2TracksStack(stack, &esdTrackList); |
1983 | } |
1984 | //AliInfo(Form("Found %d tracks in SM %d [%d]\n", nTracks, sector, esd->GetNumberOfTracks())); |
1985 | |
1986 | for(int itrack=0; itrack<nTracks; itrack++) |
1987 | esd->AddTrack((AliESDtrack*)esdTrackList[itrack]); |
1988 | |
1989 | // Reset Track and Candidate Number |
1990 | AliTRDtrackerDebug::SetCandidateNumber(0); |
1991 | AliTRDtrackerDebug::SetTrackNumber(0); |
1992 | return nTracks; |
e4f2f73d |
1993 | } |
1994 | |
1995 | //____________________________________________________________________ |
eb38ed55 |
1996 | Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList) |
e4f2f73d |
1997 | { |
41702fec |
1998 | // |
1999 | // Make tracks in one TRD stack. |
2000 | // |
2001 | // Parameters : |
2002 | // layer : Array of stack propagation layers containing clusters |
2003 | // esdTrackList : Array of ESD tracks found by the stand alone tracker. |
2004 | // On exit the tracks found in this stack are appended. |
2005 | // |
2006 | // Output : |
2007 | // Number of tracks found in this stack. |
2008 | // |
2009 | // Detailed description |
2010 | // |
2011 | // 1. Find the 3 most useful seeding chambers. See BuildSeedingConfigs() for details. |
2012 | // 2. Steer AliTRDtrackerV1::MakeSeeds() for 3 seeding layer configurations. |
2013 | // See AliTRDtrackerV1::MakeSeeds() for more details. |
2014 | // 3. Arrange track candidates in decreasing order of their quality |
2015 | // 4. Classify tracks in 5 categories according to: |
2016 | // a) number of layers crossed |
2017 | // b) track quality |
2018 | // 5. Sign clusters by tracks in decreasing order of track quality |
2019 | // 6. Build AliTRDtrack out of seeding tracklets |
2020 | // 7. Cook MC label |
2021 | // 8. Build ESD track and register it to the output list |
2022 | // |
2023 | |
b0a48c4d |
2024 | const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); |
41702fec |
2025 | AliTRDtrackingChamber *chamber = 0x0; |
fac58f00 |
2026 | AliTRDtrackingChamber **ci = 0x0; |
41702fec |
2027 | AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized |
2028 | Int_t pars[4]; // MakeSeeds parameters |
2029 | |
2030 | //Double_t alpha = AliTRDgeometry::GetAlpha(); |
2031 | //Double_t shift = .5 * alpha; |
2032 | Int_t configs[kNConfigs]; |
2033 | |
fac58f00 |
2034 | // Purge used clusters from the containers |
2035 | ci = &stack[0]; |
2036 | for(Int_t ic = kNPlanes; ic--; ci++){ |
2037 | if(!(*ci)) continue; |
2038 | (*ci)->Update(); |
2039 | } |
2040 | |
41702fec |
2041 | // Build initial seeding configurations |
2042 | Double_t quality = BuildSeedingConfigs(stack, configs); |
eb2b4f91 |
2043 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ |
41702fec |
2044 | AliInfo(Form("Plane config %d %d %d Quality %f" |
2045 | , configs[0], configs[1], configs[2], quality)); |
2046 | } |
d931f2aa |
2047 | |
41702fec |
2048 | |
2049 | // Initialize contors |
2050 | Int_t ntracks, // number of TRD track candidates |
2051 | ntracks1, // number of registered TRD tracks/iter |
2052 | ntracks2 = 0; // number of all registered TRD tracks in stack |
2053 | fSieveSeeding = 0; |
d931f2aa |
2054 | |
2055 | // Get stack index |
fac58f00 |
2056 | Int_t ic = 0; ci = &stack[0]; |
2057 | while(ic<kNPlanes && !(*ci)){ic++; ci++;} |
2058 | if(!(*ci)) return ntracks2; |
2059 | Int_t istack = fGeom->GetStack((*ci)->GetDetector()); |
d931f2aa |
2060 | |
41702fec |
2061 | do{ |
2062 | // Loop over seeding configurations |
2063 | ntracks = 0; ntracks1 = 0; |
2064 | for (Int_t iconf = 0; iconf<3; iconf++) { |
2065 | pars[0] = configs[iconf]; |
2066 | pars[1] = ntracks; |
d931f2aa |
2067 | pars[2] = istack; |
41702fec |
2068 | ntracks = MakeSeeds(stack, &sseed[6*ntracks], pars); |
2069 | if(ntracks == kMaxTracksStack) break; |
2070 | } |
eb2b4f91 |
2071 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10) AliInfo(Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding)); |
41702fec |
2072 | |
2073 | if(!ntracks) break; |
2074 | |
2075 | // Sort the seeds according to their quality |
2076 | Int_t sort[kMaxTracksStack]; |
2077 | TMath::Sort(ntracks, fTrackQuality, sort, kTRUE); |
2078 | |
2079 | // Initialize number of tracks so far and logic switches |
2080 | Int_t ntracks0 = esdTrackList->GetEntriesFast(); |
2081 | Bool_t signedTrack[kMaxTracksStack]; |
2082 | Bool_t fakeTrack[kMaxTracksStack]; |
2083 | for (Int_t i=0; i<ntracks; i++){ |
2084 | signedTrack[i] = kFALSE; |
2085 | fakeTrack[i] = kFALSE; |
2086 | } |
2087 | //AliInfo("Selecting track candidates ..."); |
2088 | |
2089 | // Sieve clusters in decreasing order of track quality |
2090 | Double_t trackParams[7]; |
2091 | // AliTRDseedV1 *lseed = 0x0; |
2092 | Int_t jSieve = 0, candidates; |
2093 | do{ |
2094 | //AliInfo(Form("\t\tITER = %i ", jSieve)); |
2095 | |
2096 | // Check track candidates |
2097 | candidates = 0; |
2098 | for (Int_t itrack = 0; itrack < ntracks; itrack++) { |
804bb02e |
2099 | Int_t trackIndex = sort[itrack]; |
2100 | if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue; |
41702fec |
2101 | |
2102 | |
804bb02e |
2103 | // Calculate track parameters from tracklets seeds |
804bb02e |
2104 | Int_t ncl = 0; |
2105 | Int_t nused = 0; |
2106 | Int_t nlayers = 0; |
2107 | Int_t findable = 0; |
2108 | for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) { |
2109 | Int_t jseed = kNPlanes*trackIndex+jLayer; |
2110 | if(!sseed[jseed].IsOK()) continue; |
f29f13a6 |
2111 | if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.158) findable++; |
eede7907 |
2112 | // TODO here we get a sig fault which should never happen ! |
804bb02e |
2113 | sseed[jseed].UpdateUsed(); |
2114 | ncl += sseed[jseed].GetN2(); |
2115 | nused += sseed[jseed].GetNUsed(); |
2116 | nlayers++; |
804bb02e |
2117 | } |
2118 | |
f29f13a6 |
2119 | // Filter duplicated tracks |
2120 | if (nused > 30){ |
2121 | //printf("Skip %d nused %d\n", trackIndex, nused); |
2122 | fakeTrack[trackIndex] = kTRUE; |
2123 | continue; |
2124 | } |
2125 | if (Float_t(nused)/ncl >= .25){ |
2126 | //printf("Skip %d nused/ncl >= .25\n", trackIndex); |
2127 | fakeTrack[trackIndex] = kTRUE; |
2128 | continue; |
2129 | } |
41702fec |
2130 | |
f29f13a6 |
2131 | // Classify tracks |
2132 | Bool_t skip = kFALSE; |
2133 | switch(jSieve){ |
2134 | case 0: |
2135 | if(nlayers < 6) {skip = kTRUE; break;} |
2136 | if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} |
2137 | break; |
2138 | |
2139 | case 1: |
2140 | if(nlayers < findable){skip = kTRUE; break;} |
2141 | if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;} |
2142 | break; |
2143 | |
2144 | case 2: |
2145 | if ((nlayers == findable) || (nlayers == 6)) { skip = kTRUE; break;} |
2146 | if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;} |
2147 | break; |
2148 | |
2149 | case 3: |
2150 | if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} |
2151 | break; |
2152 | |
2153 | case 4: |
2154 | if (nlayers == 3){skip = kTRUE; break;} |
2155 | //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;} |
2156 | break; |
2157 | } |
2158 | if(skip){ |
2159 | candidates++; |
2160 | //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused); |
2161 | continue; |
2162 | } |
2163 | signedTrack[trackIndex] = kTRUE; |
2164 | |
2165 | // Build track parameters |
2166 | AliTRDseedV1 *lseed =&sseed[trackIndex*6]; |
2167 | /* Int_t idx = 0; |
2168 | while(idx<3 && !lseed->IsOK()) { |
2169 | idx++; |
2170 | lseed++; |
2171 | }*/ |
2172 | Double_t x = lseed->GetX0();// - 3.5; |
2173 | trackParams[0] = x; //NEW AB |
2174 | trackParams[1] = lseed->GetYref(0); // lseed->GetYat(x); |
2175 | trackParams[2] = lseed->GetZref(0); // lseed->GetZat(x); |
2176 | trackParams[3] = TMath::Sin(TMath::ATan(lseed->GetYref(1))); |
2177 | trackParams[4] = lseed->GetZref(1) / TMath::Sqrt(1. + lseed->GetYref(1) * lseed->GetYref(1)); |
2178 | trackParams[5] = lseed->GetC(); |
2179 | Int_t ich = 0; while(!(chamber = stack[ich])) ich++; |
2180 | trackParams[6] = fGeom->GetSector(chamber->GetDetector());/* *alpha+shift; // Supermodule*/ |
2181 | |
2182 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ |
eb2b4f91 |
2183 | //AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1])); |
f29f13a6 |
2184 | |
f29f13a6 |
2185 | AliTRDseedV1 *dseed[6]; |
b82b4de1 |
2186 | for(Int_t iseed = AliTRDgeometry::kNlayer; iseed--;) dseed[iseed] = new AliTRDseedV1(lseed[iseed]); |
f29f13a6 |
2187 | |
2188 | //Int_t eventNrInFile = esd->GetEventNumberInFile(); |
2189 | //AliInfo(Form("Number of clusters %d.", nclusters)); |
2190 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2191 | Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber(); |
2192 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2193 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
2194 | cstreamer << "Clusters2TracksStack" |
2195 | << "EventNumber=" << eventNumber |
2196 | << "TrackNumber=" << trackNumber |
2197 | << "CandidateNumber=" << candidateNumber |
2198 | << "Iter=" << fSieveSeeding |
2199 | << "Like=" << fTrackQuality[trackIndex] |
2200 | << "S0.=" << dseed[0] |
2201 | << "S1.=" << dseed[1] |
2202 | << "S2.=" << dseed[2] |
2203 | << "S3.=" << dseed[3] |
2204 | << "S4.=" << dseed[4] |
2205 | << "S5.=" << dseed[5] |
2206 | << "p0=" << trackParams[0] |
2207 | << "p1=" << trackParams[1] |
2208 | << "p2=" << trackParams[2] |
2209 | << "p3=" << trackParams[3] |
2210 | << "p4=" << trackParams[4] |
2211 | << "p5=" << trackParams[5] |
2212 | << "p6=" << trackParams[6] |
f29f13a6 |
2213 | << "Ncl=" << ncl |
2214 | << "NLayers=" << nlayers |
2215 | << "Findable=" << findable |
2216 | << "NUsed=" << nused |
2217 | << "\n"; |
2218 | } |
d877f55f |
2219 | |
f29f13a6 |
2220 | AliTRDtrackV1 *track = MakeTrack(&sseed[trackIndex*kNPlanes], trackParams); |
2221 | if(!track){ |
2222 | AliWarning("Fail to build a TRD Track."); |
2223 | continue; |
d877f55f |
2224 | } |
41702fec |
2225 | |
f29f13a6 |
2226 | //AliInfo("End of MakeTrack()"); |
2227 | AliESDtrack *esdTrack = new ((*esdTrackList)[ntracks0++]) AliESDtrack(); |
2228 | esdTrack->UpdateTrackParams(track, AliESDtrack::kTRDout); |
2229 | esdTrack->SetLabel(track->GetLabel()); |
2230 | track->UpdateESDtrack(esdTrack); |
2231 | // write ESD-friends if neccessary |
2232 | if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ |
2233 | AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track); |
2234 | calibTrack->SetOwner(); |
2235 | esdTrack->AddCalibObject(calibTrack); |
2236 | } |
2237 | ntracks1++; |
2238 | AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1); |
41702fec |
2239 | } |
2240 | |
2241 | jSieve++; |
2242 | } while(jSieve<5 && candidates); // end track candidates sieve |
2243 | if(!ntracks1) break; |
2244 | |
2245 | // increment counters |
2246 | ntracks2 += ntracks1; |
4302c900 |
2247 | |
2248 | if(fReconstructor->IsHLT()) break; |
41702fec |
2249 | fSieveSeeding++; |
2250 | |
2251 | // Rebuild plane configurations and indices taking only unused clusters into account |
2252 | quality = BuildSeedingConfigs(stack, configs); |
3a039a31 |
2253 | if(quality < 1.E-7) break; //fReconstructor->GetRecoParam() ->GetPlaneQualityThreshold()) break; |
41702fec |
2254 | |
2255 | for(Int_t ip = 0; ip < kNPlanes; ip++){ |
2256 | if(!(chamber = stack[ip])) continue; |
b0a48c4d |
2257 | chamber->Build(fGeom, cal);//Indices(fSieveSeeding); |
41702fec |
2258 | } |
2259 | |
eb2b4f91 |
2260 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ |
41702fec |
2261 | AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality)); |
2262 | } |
2263 | } while(fSieveSeeding<10); // end stack clusters sieve |
2264 | |
2265 | |
2266 | |
2267 | //AliInfo(Form("Registered TRD tracks %d in stack %d.", ntracks2, pars[1])); |
2268 | |
2269 | return ntracks2; |
e4f2f73d |
2270 | } |
2271 | |
2272 | //___________________________________________________________________ |
eb38ed55 |
2273 | Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs) |
e4f2f73d |
2274 | { |
41702fec |
2275 | // |
2276 | // Assign probabilities to chambers according to their |
2277 | // capability of producing seeds. |
2278 | // |
2279 | // Parameters : |
2280 | // |
2281 | // layers : Array of stack propagation layers for all 6 chambers in one stack |
2282 | // configs : On exit array of configuration indexes (see GetSeedingConfig() |
2283 | // for details) in the decreasing order of their seeding probabilities. |
2284 | // |
2285 | // Output : |
2286 | // |
2287 | // Return top configuration quality |
2288 | // |
2289 | // Detailed description: |
2290 | // |
2291 | // To each chamber seeding configuration (see GetSeedingConfig() for |
2292 | // the list of all configurations) one defines 2 quality factors: |
2293 | // - an apriori topological quality (see GetSeedingConfig() for details) and |
2294 | // - a data quality based on the uniformity of the distribution of |
2295 | // clusters over the x range (time bins population). See CookChamberQA() for details. |
2296 | // The overall chamber quality is given by the product of this 2 contributions. |
2297 | // |
2298 | |
eb2b4f91 |
2299 | Double_t chamberQ[kNPlanes];memset(chamberQ, 0, kNPlanes*sizeof(Double_t)); |
41702fec |
2300 | AliTRDtrackingChamber *chamber = 0x0; |
2301 | for(int iplane=0; iplane<kNPlanes; iplane++){ |
2302 | if(!(chamber = stack[iplane])) continue; |
2303 | chamberQ[iplane] = (chamber = stack[iplane]) ? chamber->GetQuality() : 0.; |
2304 | } |
2305 | |
eb2b4f91 |
2306 | Double_t tconfig[kNConfigs];memset(tconfig, 0, kNConfigs*sizeof(Double_t)); |
2307 | Int_t planes[] = {0, 0, 0, 0}; |
41702fec |
2308 | for(int iconf=0; iconf<kNConfigs; iconf++){ |
2309 | GetSeedingConfig(iconf, planes); |
2310 | tconfig[iconf] = fgTopologicQA[iconf]; |
2311 | for(int iplane=0; iplane<4; iplane++) tconfig[iconf] *= chamberQ[planes[iplane]]; |
2312 | } |
2313 | |
2314 | TMath::Sort((Int_t)kNConfigs, tconfig, configs, kTRUE); |
2315 | // AliInfo(Form("q[%d] = %f", configs[0], tconfig[configs[0]])); |
2316 | // AliInfo(Form("q[%d] = %f", configs[1], tconfig[configs[1]])); |
2317 | // AliInfo(Form("q[%d] = %f", configs[2], tconfig[configs[2]])); |
2318 | |
2319 | return tconfig[configs[0]]; |
e4f2f73d |
2320 | } |
2321 | |
2322 | //____________________________________________________________________ |
eb38ed55 |
2323 | Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar) |
e4f2f73d |
2324 | { |
41702fec |
2325 | // |
2326 | // Make tracklet seeds in the TRD stack. |
2327 | // |
2328 | // Parameters : |
2329 | // layers : Array of stack propagation layers containing clusters |
2330 | // sseed : Array of empty tracklet seeds. On exit they are filled. |
2331 | // ipar : Control parameters: |
2332 | // ipar[0] -> seeding chambers configuration |
2333 | // ipar[1] -> stack index |
2334 | // ipar[2] -> number of track candidates found so far |
2335 | // |
2336 | // Output : |
2337 | // Number of tracks candidates found. |
2338 | // |
2339 | // Detailed description |
2340 | // |
2341 | // The following steps are performed: |
2342 | // 1. Select seeding layers from seeding chambers |
2343 | // 2. Select seeding clusters from the seeding AliTRDpropagationLayerStack. |
2344 | // The clusters are taken from layer 3, layer 0, layer 1 and layer 2, in |
2345 | // this order. The parameters controling the range of accepted clusters in |
2346 | // layer 0, 1, and 2 are defined in AliTRDchamberTimeBin::BuildCond(). |
2347 | // 3. Helix fit of the cluster set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**)) |
2348 | // 4. Initialize seeding tracklets in the seeding chambers. |
2349 | // 5. Filter 0. |
2350 | // Chi2 in the Y direction less than threshold ... (1./(3. - sLayer)) |
2351 | // Chi2 in the Z direction less than threshold ... (1./(3. - sLayer)) |
2352 | // 6. Attach clusters to seeding tracklets and find linear approximation of |
2353 | // the tracklet (see AliTRDseedV1::AttachClustersIter()). The number of used |
2354 | // clusters used by current seeds should not exceed ... (25). |
2355 | // 7. Filter 1. |
2356 | // All 4 seeding tracklets should be correctly constructed (see |
2357 | // AliTRDseedV1::AttachClustersIter()) |
2358 | // 8. Helix fit of the seeding tracklets |
2359 | // 9. Filter 2. |
2360 | // Likelihood calculation of the fit. (See AliTRDtrackerV1::CookLikelihood() for details) |
2361 | // 10. Extrapolation of the helix fit to the other 2 chambers: |
2362 | // a) Initialization of extrapolation tracklet with fit parameters |
2363 | // b) Helix fit of tracklets |
2364 | // c) Attach clusters and linear interpolation to extrapolated tracklets |
2365 | // d) Helix fit of tracklets |
2366 | // 11. Improve seeding tracklets quality by reassigning clusters. |
2367 | // See AliTRDtrackerV1::ImproveSeedQuality() for details. |
2368 | // 12. Helix fit of all 6 seeding tracklets and chi2 calculation |
2369 | // 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details. |
2370 | // 14. Cooking labels for tracklets. Should be done only for MC |
2371 | // 15. Register seeds. |
2372 | // |
2373 | |
2374 | AliTRDtrackingChamber *chamber = 0x0; |
be24510a |
2375 | AliTRDcluster *c[kNSeedPlanes] = {0x0, 0x0, 0x0, 0x0}; // initilize seeding clusters |
41702fec |
2376 | AliTRDseedV1 *cseed = &sseed[0]; // initialize tracklets for first track |
2377 | Int_t ncl, mcl; // working variable for looping over clusters |
2378 | Int_t index[AliTRDchamberTimeBin::kMaxClustersLayer], jndex[AliTRDchamberTimeBin::kMaxClustersLayer]; |
2379 | // chi2 storage |
2380 | // chi2[0] = tracklet chi2 on the Z direction |
2381 | // chi2[1] = tracklet chi2 on the R direction |
2382 | Double_t chi2[4]; |
2383 | |
41702fec |
2384 | // this should be data member of AliTRDtrack |
2385 | Double_t seedQuality[kMaxTracksStack]; |
2386 | |
2387 | // unpack control parameters |
2388 | Int_t config = ipar[0]; |
2389 | Int_t ntracks = ipar[1]; |
d931f2aa |
2390 | Int_t istack = ipar[2]; |
41702fec |
2391 | Int_t planes[kNSeedPlanes]; GetSeedingConfig(config, planes); |
be24510a |
2392 | Int_t planesExt[kNPlanes-kNSeedPlanes]; GetExtrapolationConfig(config, planesExt); |
2393 | |
2394 | |
41702fec |
2395 | // Init chambers geometry |
41702fec |
2396 | Double_t hL[kNPlanes]; // Tilting angle |
2397 | Float_t padlength[kNPlanes]; // pad lenghts |
dd8059a8 |
2398 | Float_t padwidth[kNPlanes]; // pad widths |
41702fec |
2399 | AliTRDpadPlane *pp = 0x0; |
2400 | for(int iplane=0; iplane<kNPlanes; iplane++){ |
2401 | pp = fGeom->GetPadPlane(iplane, istack); |
bb79ccd5 |
2402 | hL[iplane] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle()); |
41702fec |
2403 | padlength[iplane] = pp->GetLengthIPad(); |
dd8059a8 |
2404 | padwidth[iplane] = pp->GetWidthIPad(); |
41702fec |
2405 | } |
2406 | |
eb2b4f91 |
2407 | // Init anode wire position for chambers |
e165b64b |
2408 | Double_t x0[kNPlanes], // anode wire position |
eb2b4f91 |
2409 | driftLength = .5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); // drift length |
2410 | TGeoHMatrix *matrix = 0x0; |
2411 | Double_t loc[] = {AliTRDgeometry::AnodePos(), 0., 0.}; |
2412 | Double_t glb[] = {0., 0., 0.}; |
2413 | AliTRDtrackingChamber **cIter = &stack[0]; |
a3743898 |
2414 | for(int iLayer=0; iLayer<kNPlanes; iLayer++,cIter++){ |
eb2b4f91 |
2415 | if(!(*cIter)) continue; |
e165b64b |
2416 | if(!(matrix = fGeom->GetClusterMatrix((*cIter)->GetDetector()))){ |
2417 | continue; |
2418 | x0[iLayer] = fgkX0[iLayer]; |
2419 | } |
eb2b4f91 |
2420 | matrix->LocalToMaster(loc, glb); |
2421 | x0[iLayer] = glb[0]; |
2422 | } |
2423 | |
2424 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ |
41702fec |
2425 | AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks)); |
2426 | } |
2427 | |
d931f2aa |
2428 | // Build seeding layers |
d611c74f |
2429 | ResetSeedTB(); |
41702fec |
2430 | Int_t nlayers = 0; |
41702fec |
2431 | for(int isl=0; isl<kNSeedPlanes; isl++){ |
2432 | if(!(chamber = stack[planes[isl]])) continue; |
3a039a31 |
2433 | if(!chamber->GetSeedingLayer(fSeedTB[isl], fGeom, fReconstructor)) continue; |
41702fec |
2434 | nlayers++; |
41702fec |
2435 | } |
eb2b4f91 |
2436 | if(nlayers < kNSeedPlanes) return ntracks; |
41702fec |
2437 | |
2438 | |
2439 | // Start finding seeds |
2440 | Double_t cond0[4], cond1[4], cond2[4]; |
2441 | Int_t icl = 0; |
d611c74f |
2442 | while((c[3] = (*fSeedTB[3])[icl++])){ |
41702fec |
2443 | if(!c[3]) continue; |
d611c74f |
2444 | fSeedTB[0]->BuildCond(c[3], cond0, 0); |
2445 | fSeedTB[0]->GetClusters(cond0, index, ncl); |
41702fec |
2446 | //printf("Found c[3] candidates 0 %d\n", ncl); |
2447 | Int_t jcl = 0; |
2448 | while(jcl<ncl) { |
d611c74f |
2449 | c[0] = (*fSeedTB[0])[index[jcl++]]; |
41702fec |
2450 | if(!c[0]) continue; |
2451 | Double_t dx = c[3]->GetX() - c[0]->GetX(); |
2452 | Double_t theta = (c[3]->GetZ() - c[0]->GetZ())/dx; |
2453 | Double_t phi = (c[3]->GetY() - c[0]->GetY())/dx; |
d611c74f |
2454 | fSeedTB[1]->BuildCond(c[0], cond1, 1, theta, phi); |
2455 | fSeedTB[1]->GetClusters(cond1, jndex, mcl); |
41702fec |
2456 | //printf("Found c[0] candidates 1 %d\n", mcl); |
2457 | |
2458 | Int_t kcl = 0; |
2459 | while(kcl<mcl) { |
d611c74f |
2460 | c[1] = (*fSeedTB[1])[jndex[kcl++]]; |
2461 | if(!c[1]) continue; |
2462 | fSeedTB[2]->BuildCond(c[1], cond2, 2, theta, phi); |
2463 | c[2] = fSeedTB[2]->GetNearestCluster(cond2); |
2464 | //printf("Found c[1] candidate 2 %p\n", c[2]); |
2465 | if(!c[2]) continue; |
2466 | |
2467 | // AliInfo("Seeding clusters found. Building seeds ..."); |
2468 | // 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()); |
2469 | |
804bb02e |
2470 | for (Int_t il = 0; il < kNPlanes; il++) cseed[il].Reset(); |
41702fec |
2471 | |
d611c74f |
2472 | FitRieman(c, chi2); |
2473 | |
d931f2aa |
2474 | AliTRDseedV1 *tseed = &cseed[0]; |
bb2db46c |
2475 | cIter = &stack[0]; |
2476 | for(int iLayer=0; iLayer<kNPlanes; iLayer++, tseed++, cIter++){ |
2477 | Int_t det = (*cIter) ? (*cIter)->GetDetector() : -1; |
eb2b4f91 |
2478 | tseed->SetDetector(det); |
43d6ad34 |
2479 | tseed->SetTilt(hL[iLayer]); |
2480 | tseed->SetPadLength(padlength[iLayer]); |
dd8059a8 |
2481 | tseed->SetPadWidth(padwidth[iLayer]); |
3a039a31 |
2482 | tseed->SetReconstructor(fReconstructor); |
eb2b4f91 |
2483 | tseed->SetX0(det<0 ? fR[iLayer]+driftLength : x0[iLayer]); |
d611c74f |
2484 | tseed->Init(GetRiemanFitter()); |
f29f13a6 |
2485 | tseed->SetStandAlone(kTRUE); |
d611c74f |
2486 | } |
2487 | |
2488 | Bool_t isFake = kFALSE; |
3a039a31 |
2489 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
d611c74f |
2490 | if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2491 | if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2492 | if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; |
2493 | |
2494 | Double_t xpos[4]; |
2495 | for(Int_t l = 0; l < kNSeedPlanes; l++) xpos[l] = fSeedTB[l]->GetX(); |
2496 | Float_t yref[4]; |
2497 | for(int il=0; il<4; il++) yref[il] = cseed[planes[il]].GetYref(0); |
2498 | Int_t ll = c[3]->GetLabel(0); |
2499 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2500 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2501 | AliRieman *rim = GetRiemanFitter(); |
29f95561 |
2502 | TTreeSRedirector &cs0 = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f |
2503 | cs0 << "MakeSeeds0" |
2504 | <<"EventNumber=" << eventNumber |
2505 | <<"CandidateNumber=" << candidateNumber |
2506 | <<"isFake=" << isFake |
2507 | <<"config=" << config |
2508 | <<"label=" << ll |
2509 | <<"chi2z=" << chi2[0] |
2510 | <<"chi2y=" << chi2[1] |
2511 | <<"Y2exp=" << cond2[0] |
2512 | <<"Z2exp=" << cond2[1] |
2513 | <<"X0=" << xpos[0] //layer[sLayer]->GetX() |
2514 | <<"X1=" << xpos[1] //layer[sLayer + 1]->GetX() |
2515 | <<"X2=" << xpos[2] //layer[sLayer + 2]->GetX() |
2516 | <<"X3=" << xpos[3] //layer[sLayer + 3]->GetX() |
2517 | <<"yref0=" << yref[0] |
2518 | <<"yref1=" << yref[1] |
2519 | <<"yref2=" << yref[2] |
2520 | <<"yref3=" << yref[3] |
2521 | <<"c0.=" << c[0] |
2522 | <<"c1.=" << c[1] |
2523 | <<"c2.=" << c[2] |
2524 | <<"c3.=" << c[3] |
2525 | <<"Seed0.=" << &cseed[planes[0]] |
2526 | <<"Seed1.=" << &cseed[planes[1]] |
2527 | <<"Seed2.=" << &cseed[planes[2]] |
2528 | <<"Seed3.=" << &cseed[planes[3]] |
2529 | <<"RiemanFitter.=" << rim |
2530 | <<"\n"; |
2531 | } |
3a039a31 |
2532 | if(chi2[0] > fReconstructor->GetRecoParam() ->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){ |
91834b8d |
2533 | // //AliInfo(Form("Failed chi2 filter on chi2Z [%f].", chi2[0])); |
d611c74f |
2534 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2535 | continue; |
2536 | } |
3a039a31 |
2537 | if(chi2[1] > fReconstructor->GetRecoParam() ->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){ |
91834b8d |
2538 | // //AliInfo(Form("Failed chi2 filter on chi2Y [%f].", chi2[1])); |
d611c74f |
2539 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2540 | continue; |
2541 | } |
2542 | //AliInfo("Passed chi2 filter."); |
2543 | |
2544 | // try attaching clusters to tracklets |
d611c74f |
2545 | Int_t mlayers = 0; |
be24510a |
2546 | for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){ |
d611c74f |
2547 | Int_t jLayer = planes[iLayer]; |
f29f13a6 |
2548 | if(!cseed[jLayer].AttachClusters(stack[jLayer], kTRUE)) continue; |
2549 | cseed[jLayer].UpdateUsed(); |
2550 | if(!cseed[jLayer].IsOK()) continue; |
d611c74f |
2551 | mlayers++; |
2552 | } |
be24510a |
2553 | |
2554 | if(mlayers < kNSeedPlanes){ |
2555 | //AliInfo(Form("Failed updating all seeds %d [%d].", mlayers, kNSeedPlanes)); |
2556 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2557 | continue; |
2558 | } |
2559 | |
2560 | // temporary exit door for the HLT |
4302c900 |
2561 | if(fReconstructor->IsHLT()){ |
be24510a |
2562 | // attach clusters to extrapolation chambers |
2563 | for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){ |
2564 | Int_t jLayer = planesExt[iLayer]; |
2565 | if(!(chamber = stack[jLayer])) continue; |
f29f13a6 |
2566 | cseed[jLayer].AttachClusters(chamber, kTRUE); |
be24510a |
2567 | } |
4302c900 |
2568 | fTrackQuality[ntracks] = 1.; // dummy value |
2569 | ntracks++; |
218ba867 |
2570 | if(ntracks == kMaxTracksStack) return ntracks; |
4302c900 |
2571 | cseed += 6; |
2572 | continue; |
2573 | } |
2574 | |
be24510a |
2575 | |
f29f13a6 |
2576 | // Update Seeds and calculate Likelihood |
d611c74f |
2577 | // fit tracklets and cook likelihood |
f29f13a6 |
2578 | FitTiltedRieman(&cseed[0], kTRUE); |
2579 | for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){ |
2580 | Int_t jLayer = planes[iLayer]; |
2581 | cseed[jLayer].Fit(kTRUE); |
2582 | } |
91834b8d |
2583 | Double_t like = CookLikelihood(&cseed[0], planes); // to be checked |
d611c74f |
2584 | |
3a039a31 |
2585 | if (TMath::Log(1.E-9 + like) < fReconstructor->GetRecoParam() ->GetTrackLikelihood()){ |
d611c74f |
2586 | //AliInfo(Form("Failed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); |
2587 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2588 | continue; |
2589 | } |
2590 | //AliInfo(Form("Passed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); |
2591 | |
2592 | // book preliminary results |
2593 | seedQuality[ntracks] = like; |
2594 | fSeedLayer[ntracks] = config;/*sLayer;*/ |
2595 | |
2596 | // attach clusters to the extrapolation seeds |
be24510a |
2597 | for(int iLayer=0; iLayer<kNPlanes-kNSeedPlanes; iLayer++){ |
2598 | Int_t jLayer = planesExt[iLayer]; |
d611c74f |
2599 | if(!(chamber = stack[jLayer])) continue; |
d611c74f |
2600 | |
2601 | // fit extrapolated seed |
2602 | if ((jLayer == 0) && !(cseed[1].IsOK())) continue; |
2603 | if ((jLayer == 5) && !(cseed[4].IsOK())) continue; |
2604 | AliTRDseedV1 pseed = cseed[jLayer]; |
f29f13a6 |
2605 | if(!pseed.AttachClusters(chamber, kTRUE)) continue; |
2606 | pseed.Fit(kTRUE); |
d611c74f |
2607 | cseed[jLayer] = pseed; |
d611c74f |
2608 | FitTiltedRieman(cseed, kTRUE); |
f29f13a6 |
2609 | cseed[jLayer].Fit(kTRUE); |
d611c74f |
2610 | } |
2611 | |
2612 | // AliInfo("Extrapolation done."); |
2613 | // Debug Stream containing all the 6 tracklets |
3a039a31 |
2614 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
29f95561 |
2615 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f |
2616 | TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); |
2617 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2618 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2619 | cstreamer << "MakeSeeds1" |
2620 | << "EventNumber=" << eventNumber |
2621 | << "CandidateNumber=" << candidateNumber |
2622 | << "S0.=" << &cseed[0] |
2623 | << "S1.=" << &cseed[1] |
2624 | << "S2.=" << &cseed[2] |
2625 | << "S3.=" << &cseed[3] |
2626 | << "S4.=" << &cseed[4] |
2627 | << "S5.=" << &cseed[5] |
2628 | << "FitterT.=" << tiltedRieman |
2629 | << "\n"; |
2630 | } |
2631 | |
b72f4eaf |
2632 | if(fReconstructor->HasImproveTracklets() && ImproveSeedQuality(stack, cseed) < 4){ |
d611c74f |
2633 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2634 | continue; |
2635 | } |
2636 | //AliInfo("Improve seed quality done."); |
2637 | |
2638 | // fit full track and cook likelihoods |
2639 | // Double_t curv = FitRieman(&cseed[0], chi2); |
2640 | // Double_t chi2ZF = chi2[0] / TMath::Max((mlayers - 3.), 1.); |
2641 | // Double_t chi2RF = chi2[1] / TMath::Max((mlayers - 3.), 1.); |
2642 | |
2643 | // do the final track fitting (Once with vertex constraint and once without vertex constraint) |
2644 | Double_t chi2Vals[3]; |
2645 | chi2Vals[0] = FitTiltedRieman(&cseed[0], kFALSE); |
b72f4eaf |
2646 | if(fReconstructor->HasVertexConstrained()) |
d611c74f |
2647 | chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ()); // Do Vertex Constrained fit if desired |
2648 | else |
2649 | chi2Vals[1] = 1.; |
2650 | chi2Vals[2] = GetChi2Z(&cseed[0]) / TMath::Max((mlayers - 3.), 1.); |
2651 | // Chi2 definitions in testing stage |
2652 | //chi2Vals[2] = GetChi2ZTest(&cseed[0]); |
2653 | fTrackQuality[ntracks] = CalculateTrackLikelihood(&cseed[0], &chi2Vals[0]); |
2654 | //AliInfo("Hyperplane fit done\n"); |
fac58f00 |
2655 | |
3a039a31 |
2656 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
29f95561 |
2657 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
d611c74f |
2658 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2659 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2660 | TLinearFitter *fitterTC = GetTiltedRiemanFitterConstraint(); |
2661 | TLinearFitter *fitterT = GetTiltedRiemanFitter(); |
91834b8d |
2662 | Int_t ncls = 0; |
2663 | for(Int_t iseed = 0; iseed < kNPlanes; iseed++){ |
2664 | ncls += cseed[iseed].IsOK() ? cseed[iseed].GetN2() : 0; |
2665 | } |
d611c74f |
2666 | cstreamer << "MakeSeeds2" |
2667 | << "EventNumber=" << eventNumber |
2668 | << "CandidateNumber=" << candidateNumber |
2669 | << "Chi2TR=" << chi2Vals[0] |
2670 | << "Chi2TC=" << chi2Vals[1] |
2671 | << "Nlayers=" << mlayers |
91834b8d |
2672 | << "NClusters=" << ncls |
d611c74f |
2673 | << "Like=" << like |
2674 | << "S0.=" << &cseed[0] |
2675 | << "S1.=" << &cseed[1] |
2676 | << "S2.=" << &cseed[2] |
2677 | << "S3.=" << &cseed[3] |
2678 | << "S4.=" << &cseed[4] |
2679 | << "S5.=" << &cseed[5] |
d611c74f |
2680 | << "FitterT.=" << fitterT |
2681 | << "FitterTC.=" << fitterTC |
2682 | << "\n"; |
2683 | } |
2684 | |
2685 | ntracks++; |
2686 | AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); |
2687 | if(ntracks == kMaxTracksStack){ |
2688 | AliWarning(Form("Number of seeds reached maximum allowed (%d) in stack.", kMaxTracksStack)); |
2689 | return ntracks; |
2690 | } |
2691 | cseed += 6; |
41702fec |
2692 | } |
2693 | } |
2694 | } |
41702fec |
2695 | |
2696 | return ntracks; |
e4f2f73d |
2697 | } |
2698 | |
2699 | //_____________________________________________________________________________ |
0906e73e |
2700 | AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 *seeds, Double_t *params) |
e4f2f73d |
2701 | { |
41702fec |
2702 | // |
2703 | // Build a TRD track out of tracklet candidates |
2704 | // |
2705 | // Parameters : |
2706 | // seeds : array of tracklets |
2707 | // params : track parameters (see MakeSeeds() function body for a detailed description) |
2708 | // |
2709 | // Output : |
2710 | // The TRD track. |
2711 | // |
2712 | // Detailed description |
2713 | // |
2714 | // To be discussed with Marian !! |
2715 | // |
2716 | |
41702fec |
2717 | |
2718 | Double_t alpha = AliTRDgeometry::GetAlpha(); |
2719 | Double_t shift = AliTRDgeometry::GetAlpha()/2.0; |
2720 | Double_t c[15]; |
2721 | |
2722 | c[ 0] = 0.2; |
2723 | c[ 1] = 0.0; c[ 2] = 2.0; |
2724 | c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02; |
2725 | c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1; |
2726 | c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01; |
2727 | |
d20df6fc |
2728 | AliTRDtrackV1 track(seeds, ¶ms[1], c, params[0], params[6]*alpha+shift); |
2729 | track.PropagateTo(params[0]-5.0); |
f29f13a6 |
2730 | AliTRDseedV1 *ptrTracklet = 0x0; |
2731 | // Sign clusters |
2732 | for (Int_t jLayer = 0; jLayer < AliTRDgeometry::kNlayer; jLayer++) { |
2733 | ptrTracklet = &seeds[jLayer]; |
2734 | if(!ptrTracklet->IsOK()) continue; |
2735 | if(TMath::Abs(ptrTracklet->GetYref(1) - ptrTracklet->GetYfit(1)) >= .2) continue; // check this condition with Marian |
2736 | } |
2737 | // |
91834b8d |
2738 | if(fReconstructor->IsHLT()){ |
91834b8d |
2739 | for(Int_t ip=0; ip<kNPlanes; ip++){ |
2740 | track.UnsetTracklet(ip); |
2741 | ptrTracklet = SetTracklet(&seeds[ip]); |
f29f13a6 |
2742 | ptrTracklet->UseClusters(); |
91834b8d |
2743 | track.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); |
2744 | } |
d78d7df0 |
2745 | AliTRDtrackV1 *ptrTrack = SetTrack(&track); |
2746 | ptrTrack->SetReconstructor(fReconstructor); |
2747 | return ptrTrack; |
91834b8d |
2748 | } |
393fda1c |
2749 | |
d20df6fc |
2750 | track.ResetCovariance(1); |
e79f8eb0 |
2751 | Int_t nc = TMath::Abs(FollowBackProlongation(track)); |
393fda1c |
2752 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 5){ |
2753 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2754 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2755 | Double_t p[5]; // Track Params for the Debug Stream |
2756 | track.GetExternalParameters(params[0], p); |
29f95561 |
2757 | TTreeSRedirector &cs = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
393fda1c |
2758 | cs << "MakeTrack" |
2759 | << "EventNumber=" << eventNumber |
2760 | << "CandidateNumber=" << candidateNumber |
2761 | << "nc=" << nc |
2762 | << "X=" << params[0] |
2763 | << "Y=" << p[0] |
2764 | << "Z=" << p[1] |
2765 | << "snp=" << p[2] |
2766 | << "tnd=" << p[3] |
2767 | << "crv=" << p[4] |
2768 | << "Yin=" << params[1] |
2769 | << "Zin=" << params[2] |
2770 | << "snpin=" << params[3] |
2771 | << "tndin=" << params[4] |
2772 | << "crvin=" << params[5] |
2773 | << "track.=" << &track |
2774 | << "\n"; |
2775 | } |
d20df6fc |
2776 | if (nc < 30) return 0x0; |
2777 | |
2778 | AliTRDtrackV1 *ptrTrack = SetTrack(&track); |
215f7116 |
2779 | ptrTrack->SetReconstructor(fReconstructor); |
48f8adf3 |
2780 | ptrTrack->CookLabel(.9); |
24253b0a |
2781 | |
d20df6fc |
2782 | // computes PID for track |
2783 | ptrTrack->CookPID(); |
2784 | // update calibration references using this track |
48f8adf3 |
2785 | AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); |
2786 | if (!calibra){ |
2787 | AliInfo("Could not get Calibra instance\n"); |
2788 | if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(ptrTrack); |
2789 | } |
d20df6fc |
2790 | return ptrTrack; |
e4f2f73d |
2791 | } |
2792 | |
0906e73e |
2793 | |
e4f2f73d |
2794 | //____________________________________________________________________ |
eb38ed55 |
2795 | Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *cseed) |
e4f2f73d |
2796 | { |
41702fec |
2797 | // |
2798 | // Sort tracklets according to "quality" and try to "improve" the first 4 worst |
2799 | // |
2800 | // Parameters : |
2801 | // layers : Array of propagation layers for a stack/supermodule |
2802 | // cseed : Array of 6 seeding tracklets which has to be improved |
2803 | // |
f29f13a6 |
2804 | // Output : |
41702fec |
2805 | // cssed : Improved seeds |
2806 | // |
2807 | // Detailed description |
2808 | // |
2809 | // Iterative procedure in which new clusters are searched for each |
2810 | // tracklet seed such that the seed quality (see AliTRDseed::GetQuality()) |
2811 | // can be maximized. If some optimization is found the old seeds are replaced. |
2812 | // |
2813 | // debug level: 7 |
2814 | // |
2815 | |
2816 | // make a local working copy |
2817 | AliTRDtrackingChamber *chamber = 0x0; |
2818 | AliTRDseedV1 bseed[6]; |
2819 | Int_t nLayers = 0; |
2820 | for (Int_t jLayer = 0; jLayer < 6; jLayer++) bseed[jLayer] = cseed[jLayer]; |
2821 | |
2822 | Float_t lastquality = 10000.0; |
2823 | Float_t lastchi2 = 10000.0; |
2824 | Float_t chi2 = 1000.0; |
2825 | |
2826 | for (Int_t iter = 0; iter < 4; iter++) { |
2827 | Float_t sumquality = 0.0; |
2828 | Float_t squality[6]; |
2829 | Int_t sortindexes[6]; |
2830 | |
2831 | for (Int_t jLayer = 0; jLayer < 6; jLayer++) { |
3a039a31 |
2832 | squality[jLayer] = bseed[jLayer].IsOK() ? bseed[jLayer].GetQuality(kTRUE) : 1000.; |
41702fec |
2833 | sumquality += squality[jLayer]; |
2834 | } |
2835 | if ((sumquality >= lastquality) || (chi2 > lastchi2)) break; |
2836 | |
2837 | nLayers = 0; |
2838 | lastquality = sumquality; |
2839 | lastchi2 = chi2; |
2840 | if (iter > 0) for (Int_t jLayer = 0; jLayer < 6; jLayer++) cseed[jLayer] = bseed[jLayer]; |
2841 | |
2842 | TMath::Sort(6, squality, sortindexes, kFALSE); |
2843 | for (Int_t jLayer = 5; jLayer > 1; jLayer--) { |
2844 | Int_t bLayer = sortindexes[jLayer]; |
2845 | if(!(chamber = stack[bLayer])) continue; |
f29f13a6 |
2846 | bseed[bLayer].AttachClusters(chamber, kTRUE); |
2847 | bseed[bLayer].Fit(kTRUE); |
41702fec |
2848 | if(bseed[bLayer].IsOK()) nLayers++; |
2849 | } |
2850 | |
2851 | chi2 = FitTiltedRieman(bseed, kTRUE); |
3a039a31 |
2852 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 7){ |
41702fec |
2853 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2854 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
2855 | TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); |
29f95561 |
2856 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
2857 | cstreamer << "ImproveSeedQuality" |
2858 | << "EventNumber=" << eventNumber |
2859 | << "CandidateNumber=" << candidateNumber |
2860 | << "Iteration=" << iter |
2861 | << "S0.=" << &bseed[0] |
2862 | << "S1.=" << &bseed[1] |
2863 | << "S2.=" << &bseed[2] |
2864 | << "S3.=" << &bseed[3] |
2865 | << "S4.=" << &bseed[4] |
2866 | << "S5.=" << &bseed[5] |
2867 | << "FitterT.=" << tiltedRieman |
2868 | << "\n"; |
2869 | } |
2870 | } // Loop: iter |
41702fec |
2871 | // we are sure that at least 2 tracklets are OK ! |
2872 | return nLayers+2; |
e4f2f73d |
2873 | } |
2874 | |
eb38ed55 |
2875 | //_________________________________________________________________________ |
2876 | Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2){ |
41702fec |
2877 | // |
2878 | // Calculates the Track Likelihood value. This parameter serves as main quality criterion for |
2879 | // the track selection |
2880 | // The likelihood value containes: |
2881 | // - The chi2 values from the both fitters and the chi2 values in z-direction from a linear fit |
2882 | // - The Sum of the Parameter |slope_ref - slope_fit|/Sigma of the tracklets |
2883 | // For all Parameters an exponential dependency is used |
2884 | // |
2885 | // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate |
2886 | // - Array of chi2 values: |
2887 | // * Non-Constrained Tilted Riemann fit |
2888 | // * Vertex-Constrained Tilted Riemann fit |
2889 | // * z-Direction from Linear fit |
2890 | // Output: - The calculated track likelihood |
2891 | // |
2892 | // debug level 2 |
2893 | // |
2894 | |
f29f13a6 |
2895 | Double_t chi2phi = 0, nLayers = 0; |
41702fec |
2896 | for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { |
2897 | if(!tracklets[iLayer].IsOK()) continue; |
f29f13a6 |
2898 | chi2phi += tracklets[iLayer].GetChi2Phi(); |
41702fec |
2899 | nLayers++; |
2900 | } |
f29f13a6 |
2901 | chi2phi /= Float_t (nLayers - 2.0); |
41702fec |
2902 | |
2903 | Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); // Chi2Z |
b72f4eaf |
2904 | Double_t likeChi2TC = (fReconstructor->HasVertexConstrained()) ? |
d20df6fc |
2905 | TMath::Exp(-chi2[1] * 0.677) : 1; // Constrained Tilted Riemann |
41702fec |
2906 | Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.78); // Non-constrained Tilted Riemann |
f29f13a6 |
2907 | Double_t likeChi2Phi= TMath::Exp(-chi2phi * 3.23); |
2908 | Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeChi2Phi; |
41702fec |
2909 | |
3a039a31 |
2910 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
41702fec |
2911 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2912 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
29f95561 |
2913 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
2914 | cstreamer << "CalculateTrackLikelihood0" |
2915 | << "EventNumber=" << eventNumber |
2916 | << "CandidateNumber=" << candidateNumber |
2917 | << "LikeChi2Z=" << likeChi2Z |
2918 | << "LikeChi2TR=" << likeChi2TR |
2919 | << "LikeChi2TC=" << likeChi2TC |
f29f13a6 |
2920 | << "LikeChi2Phi=" << likeChi2Phi |
41702fec |
2921 | << "TrackLikelihood=" << trackLikelihood |
2922 | << "\n"; |
2923 | } |
2924 | |
2925 | return trackLikelihood; |
e4f2f73d |
2926 | } |
2927 | |
2928 | //____________________________________________________________________ |
91834b8d |
2929 | Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) |
e4f2f73d |
2930 | { |
41702fec |
2931 | // |
2932 | // Calculate the probability of this track candidate. |
2933 | // |
2934 | // Parameters : |
2935 | // cseeds : array of candidate tracklets |
2936 | // planes : array of seeding planes (see seeding configuration) |
2937 | // chi2 : chi2 values (on the Z and Y direction) from the rieman fit of the track. |
2938 | // |
2939 | // Output : |
2940 | // likelihood value |
2941 | // |
2942 | // Detailed description |
2943 | // |
2944 | // The track quality is estimated based on the following 4 criteria: |
2945 | // 1. precision of the rieman fit on the Y direction (likea) |
2946 | // 2. chi2 on the Y direction (likechi2y) |
2947 | // 3. chi2 on the Z direction (likechi2z) |
2948 | // 4. number of attached clusters compared to a reference value |
2949 | // (see AliTRDrecoParam::fkFindable) (likeN) |
2950 | // |
2951 | // The distributions for each type of probabilities are given below as of |
2952 | // (date). They have to be checked to assure consistency of estimation. |
2953 | // |
2954 | |
2955 | // ratio of the total number of clusters/track which are expected to be found by the tracker. |
91834b8d |
2956 | const AliTRDrecoParam *fRecoPars = fReconstructor->GetRecoParam(); |
41702fec |
2957 | |
91834b8d |
2958 | Double_t chi2y = GetChi2Y(&cseed[0]); |
2959 | Double_t chi2z = GetChi2Z(&cseed[0]); |
2960 | |
8ae98148 |
2961 | Float_t nclusters = 0.; |
41702fec |
2962 | Double_t sumda = 0.; |
2963 | for(UChar_t ilayer = 0; ilayer < 4; ilayer++){ |
2964 | Int_t jlayer = planes[ilayer]; |
2965 | nclusters += cseed[jlayer].GetN2(); |
e3cf3d02 |
2966 | sumda += TMath::Abs(cseed[jlayer].GetYfit(1) - cseed[jlayer].GetYref(1)); |
41702fec |
2967 | } |
8ae98148 |
2968 | nclusters *= .25; |
2969 | |
5a2e200c |
2970 | Double_t likea = TMath::Exp(-sumda * fRecoPars->GetPhiSlope()); |
41702fec |
2971 | Double_t likechi2y = 0.0000000001; |
5a2e200c |
2972 | if (fReconstructor->IsCosmic() || chi2y < fRecoPars->GetChi2YCut()) likechi2y += TMath::Exp(-TMath::Sqrt(chi2y) * fRecoPars->GetChi2YSlope()); |
2973 | Double_t likechi2z = TMath::Exp(-chi2z * fRecoPars->GetChi2ZSlope()); |
8ae98148 |
2974 | Double_t likeN = TMath::Exp(-(fRecoPars->GetNMeanClusters() - nclusters) / fRecoPars->GetNSigmaClusters()); |
41702fec |
2975 | Double_t like = likea * likechi2y * likechi2z * likeN; |
2976 | |
2977 | // 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 |
2978 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ |
41702fec |
2979 | Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); |
2980 | Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); |
91834b8d |
2981 | Int_t nTracklets = 0; Float_t mean_ncls = 0; |
2982 | for(Int_t iseed=0; iseed < kNPlanes; iseed++){ |
2983 | if(!cseed[iseed].IsOK()) continue; |
2984 | nTracklets++; |
2985 | mean_ncls += cseed[iseed].GetN2(); |
2986 | } |
2987 | if(nTracklets) mean_ncls /= nTracklets; |
41702fec |
2988 | // The Debug Stream contains the seed |
29f95561 |
2989 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
41702fec |
2990 | cstreamer << "CookLikelihood" |
2991 | << "EventNumber=" << eventNumber |
2992 | << "CandidateNumber=" << candidateNumber |
2993 | << "tracklet0.=" << &cseed[0] |
2994 | << "tracklet1.=" << &cseed[1] |
2995 | << "tracklet2.=" << &cseed[2] |
2996 | << "tracklet3.=" << &cseed[3] |
2997 | << "tracklet4.=" << &cseed[4] |
2998 | << "tracklet5.=" << &cseed[5] |
2999 | << "sumda=" << sumda |
91834b8d |
3000 | << "chi2y=" << chi2y |
3001 | << "chi2z=" << chi2z |
41702fec |
3002 | << "likea=" << likea |
3003 | << "likechi2y=" << likechi2y |
3004 | << "likechi2z=" << likechi2z |
3005 | << "nclusters=" << nclusters |
3006 | << "likeN=" << likeN |
3007 | << "like=" << like |
91834b8d |
3008 | << "meanncls=" << mean_ncls |
41702fec |
3009 | << "\n"; |
3010 | } |
3011 | |
3012 | return like; |
e4f2f73d |
3013 | } |
3014 | |
e4f2f73d |
3015 | //____________________________________________________________________ |
0906e73e |
3016 | void AliTRDtrackerV1::GetSeedingConfig(Int_t iconfig, Int_t planes[4]) |
e4f2f73d |
3017 | { |
41702fec |
3018 | // |
3019 | // Map seeding configurations to detector planes. |
3020 | // |
3021 | // Parameters : |
3022 | // iconfig : configuration index |
3023 | // planes : member planes of this configuration. On input empty. |
3024 | // |
3025 | // Output : |
3026 | // planes : contains the planes which are defining the configuration |
3027 | // |
3028 | // Detailed description |
3029 | // |
3030 | // Here is the list of seeding planes configurations together with |
3031 | // their topological classification: |
3032 | // |
3033 | // 0 - 5432 TQ 0 |
3034 | // 1 - 4321 TQ 0 |
3035 | // 2 - 3210 TQ 0 |
3036 | // 3 - 5321 TQ 1 |
3037 | // 4 - 4210 TQ 1 |
3038 | // 5 - 5431 TQ 1 |
3039 | // 6 - 4320 TQ 1 |
3040 | // 7 - 5430 TQ 2 |
3041 | // 8 - 5210 TQ 2 |
3042 | // 9 - 5421 TQ 3 |
3043 | // 10 - 4310 TQ 3 |
3044 | // 11 - 5410 TQ 4 |
3045 | // 12 - 5420 TQ 5 |
3046 | // 13 - 5320 TQ 5 |
3047 | // 14 - 5310 TQ 5 |
3048 | // |
3049 | // The topologic quality is modeled as follows: |
3050 | // 1. The general model is define by the equation: |
3051 | // p(conf) = exp(-conf/2) |
3052 | // 2. According to the topologic classification, configurations from the same |
3053 | // class are assigned the agerage value over the model values. |
3054 | // 3. Quality values are normalized. |
3055 | // |
3056 | // The topologic quality distribution as function of configuration is given below: |
3057 | //Begin_Html |
3058 | // <img src="gif/topologicQA.gif"> |
3059 | //End_Html |
3060 | // |
3061 | |
3062 | switch(iconfig){ |
3063 | case 0: // 5432 TQ 0 |
3064 | planes[0] = 2; |
3065 | planes[1] = 3; |
3066 | planes[2] = 4; |
3067 | planes[3] = 5; |
3068 | break; |
3069 | case 1: // 4321 TQ 0 |
3070 | planes[0] = 1; |
3071 | planes[1] = 2; |
3072 | planes[2] = 3; |
3073 | planes[3] = 4; |
3074 | break; |
3075 | case 2: // 3210 TQ 0 |
3076 | planes[0] = 0; |
3077 | planes[1] = 1; |
3078 | planes[2] = 2; |
3079 | planes[3] = 3; |
3080 | break; |
3081 | case 3: // 5321 TQ 1 |
3082 | planes[0] = 1; |
3083 | planes[1] = 2; |
3084 | planes[2] = 3; |
3085 | planes[3] = 5; |
3086 | break; |
3087 | case 4: // 4210 TQ 1 |
3088 | planes[0] = 0; |
3089 | planes[1] = 1; |
3090 | planes[2] = 2; |
3091 | planes[3] = 4; |
3092 | break; |
3093 | case 5: // 5431 TQ 1 |
3094 | planes[0] = 1; |
3095 | planes[1] = 3; |
3096 | planes[2] = 4; |
3097 | planes[3] = 5; |
3098 | break; |
3099 | case 6: // 4320 TQ 1 |
3100 | planes[0] = 0; |
3101 | planes[1] = 2; |
3102 | planes[2] = 3; |
3103 | planes[3] = 4; |
3104 | break; |
3105 | case 7: // 5430 TQ 2 |
3106 | planes[0] = 0; |
3107 | planes[1] = 3; |
3108 | planes[2] = 4; |
3109 | planes[3] = 5; |
3110 | break; |
3111 | case 8: // 5210 TQ 2 |
3112 | planes[0] = 0; |
3113 | planes[1] = 1; |
3114 | planes[2] = 2; |
3115 | planes[3] = 5; |
3116 | break; |
3117 | case 9: // 5421 TQ 3 |
3118 | planes[0] = 1; |
3119 | planes[1] = 2; |
3120 | planes[2] = 4; |
3121 | planes[3] = 5; |
3122 | break; |
3123 | case 10: // 4310 TQ 3 |
3124 | planes[0] = 0; |
3125 | planes[1] = 1; |
3126 | planes[2] = 3; |
3127 | planes[3] = 4; |
3128 | break; |
3129 | case 11: // 5410 TQ 4 |
3130 | planes[0] = 0; |
3131 | planes[1] = 1; |
3132 | planes[2] = 4; |
3133 | planes[3] = 5; |
3134 | break; |
3135 | case 12: // 5420 TQ 5 |
3136 | planes[0] = 0; |
3137 | planes[1] = 2; |
3138 | planes[2] = 4; |
3139 | planes[3] = 5; |
3140 | break; |
3141 | case 13: // 5320 TQ 5 |
3142 | planes[0] = 0; |
3143 | planes[1] = 2; |
3144 | planes[2] = 3; |
3145 | planes[3] = 5; |
3146 | break; |
3147 | case 14: // 5310 TQ 5 |
3148 | planes[0] = 0; |
3149 | planes[1] = 1; |
3150 | planes[2] = 3; |
3151 | planes[3] = 5; |
3152 | break; |
3153 | } |
e4f2f73d |
3154 | } |
3155 | |
3156 | //____________________________________________________________________ |
0906e73e |
3157 | void AliTRDtrackerV1::GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]) |
e4f2f73d |
3158 | { |
41702fec |
3159 | // |
3160 | // Returns the extrapolation planes for a seeding configuration. |
3161 | // |
3162 | // Parameters : |
3163 | // iconfig : configuration index |
3164 | // planes : planes which are not in this configuration. On input empty. |
3165 | // |
3166 | // Output : |
3167 | // planes : contains the planes which are not in the configuration |
3168 | // |
3169 | // Detailed description |
3170 | // |
3171 | |
3172 | switch(iconfig){ |
3173 | case 0: // 5432 TQ 0 |
3174 | planes[0] = 1; |
3175 | planes[1] = 0; |
3176 | break; |
3177 | case 1: // 4321 TQ 0 |
3178 | planes[0] = 5; |
3179 | planes[1] = 0; |
3180 | break; |
3181 | case 2: // 3210 TQ 0 |
3182 | planes[0] = 4; |
3183 | planes[1] = 5; |
3184 | break; |
3185 | case 3: // 5321 TQ 1 |
3186 | planes[0] = 4; |
3187 | planes[1] = 0; |
3188 | break; |
3189 | case 4: // 4210 TQ 1 |
3190 | planes[0] = 5; |
3191 | planes[1] = 3; |
3192 | break; |
3193 | case 5: // 5431 TQ 1 |
3194 | planes[0] = 2; |
3195 | planes[1] = 0; |
3196 | break; |
3197 | case 6: // 4320 TQ 1 |
3198 | planes[0] = 5; |
3199 | planes[1] = 1; |
3200 | break; |
3201 | case 7: // 5430 TQ 2 |
3202 | planes[0] = 2; |
3203 | planes[1] = 1; |
3204 | break; |
3205 | case 8: // 5210 TQ 2 |
3206 | planes[0] = 4; |
3207 | planes[1] = 3; |
3208 | break; |
3209 | case 9: // 5421 TQ 3 |
3210 | planes[0] = 3; |
3211 | planes[1] = 0; |
3212 | break; |
3213 | case 10: // 4310 TQ 3 |
3214 | planes[0] = 5; |
3215 | planes[1] = 2; |
3216 | break; |
3217 | case 11: // 5410 TQ 4 |
3218 | planes[0] = 3; |
3219 | planes[1] = 2; |
3220 | break; |
3221 | case 12: // 5420 TQ 5 |
3222 | planes[0] = 3; |
3223 | planes[1] = 1; |
3224 | break; |
3225 | case 13: // 5320 TQ 5 |
3226 | planes[0] = 4; |
3227 | planes[1] = 1; |
3228 | break; |
3229 | case 14: // 5310 TQ 5 |
3230 | planes[0] = 4; |
3231 | planes[1] = 2; |
3232 | break; |
3233 | } |
e4f2f73d |
3234 | } |
eb38ed55 |
3235 | |
3236 | //____________________________________________________________________ |
3237 | AliCluster* AliTRDtrackerV1::GetCluster(Int_t idx) const |
3238 | { |
41702fec |
3239 | Int_t ncls = fClusters->GetEntriesFast(); |
2f7514a6 |
3240 | return idx >= 0 && idx < ncls ? (AliCluster*)fClusters->UncheckedAt(idx) : 0x0; |
eb38ed55 |
3241 | } |
3242 | |
3b57a3f7 |
3243 | //____________________________________________________________________ |
3244 | AliTRDseedV1* AliTRDtrackerV1::GetTracklet(Int_t idx) const |
3245 | { |
41702fec |
3246 | Int_t ntrklt = fTracklets->GetEntriesFast(); |
2f7514a6 |
3247 | return idx >= 0 && idx < ntrklt ? (AliTRDseedV1*)fTracklets->UncheckedAt(idx) : 0x0; |
3b57a3f7 |
3248 | } |
3249 | |
3250 | //____________________________________________________________________ |
3251 | AliKalmanTrack* AliTRDtrackerV1::GetTrack(Int_t idx) const |
3252 | { |
41702fec |
3253 | Int_t ntrk = fTracks->GetEntriesFast(); |
2f7514a6 |
3254 | return idx >= 0 && idx < ntrk ? (AliKalmanTrack*)fTracks->UncheckedAt(idx) : 0x0; |
3b57a3f7 |
3255 | } |
3256 | |
bb56afff |
3257 | //____________________________________________________________________ |
3258 | Float_t AliTRDtrackerV1::CalculateReferenceX(AliTRDseedV1 *tracklets){ |
41702fec |
3259 | // |
3260 | // Calculates the reference x-position for the tilted Rieman fit defined as middle |
3261 | // of the stack (middle between layers 2 and 3). For the calculation all the tracklets |
3262 | // are taken into account |
3263 | // |
3264 | // Parameters: - Array of tracklets(AliTRDseedV1) |
3265 | // |
3266 | // Output: - The reference x-position(Float_t) |
3267 | // |
3268 | Int_t nDistances = 0; |
3269 | Float_t meanDistance = 0.; |
3270 | Int_t startIndex = 5; |
3271 | for(Int_t il =5; il > 0; il--){ |
3272 | if(tracklets[il].IsOK() && tracklets[il -1].IsOK()){ |
3273 | Float_t xdiff = tracklets[il].GetX0() - tracklets[il -1].GetX0(); |
3274 | meanDistance += xdiff; |
3275 | nDistances++; |
3276 | } |
3277 | if(tracklets[il].IsOK()) startIndex = il; |
3278 | } |
3279 | if(tracklets[0].IsOK()) startIndex = 0; |
3280 | if(!nDistances){ |
3281 | // We should normally never get here |
3282 | Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2); |
3283 | Int_t iok = 0, idiff = 0; |
3284 | // This attempt is worse and should be avoided: |
3285 | // check for two chambers which are OK and repeat this without taking the mean value |
3286 | // Strategy avoids a division by 0; |
3287 | for(Int_t il = 5; il >= 0; il--){ |
3288 | if(tracklets[il].IsOK()){ |
3289 | xpos[iok] = tracklets[il].GetX0(); |
3290 | iok++; |
3291 | startIndex = il; |
3292 | } |
3293 | if(iok) idiff++; // to get the right difference; |
3294 | if(iok > 1) break; |
3295 | } |
3296 | if(iok > 1){ |
3297 | meanDistance = (xpos[0] - xpos[1])/idiff; |
3298 | } |
3299 | else{ |
3300 | // we have do not even have 2 layers which are OK? The we do not need to fit at all |
3301 | return 331.; |
3302 | } |
3303 | } |
3304 | else{ |
3305 | meanDistance /= nDistances; |
3306 | } |
3307 | return tracklets[startIndex].GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
bb56afff |
3308 | } |
eb38ed55 |
3309 | |
fac58f00 |
3310 | // //_____________________________________________________________________________ |
3311 | // Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist |
3312 | // , Int_t *outlist, Bool_t down) |
3313 | // { |
3314 | // // |
3315 | // // Sort eleements according occurancy |
3316 | // // The size of output array has is 2*n |
3317 | // // |
3318 | // |
3319 | // if (n <= 0) { |
3320 | // return 0; |
3321 | // } |
3322 | // |
3323 | // Int_t *sindexS = new Int_t[n]; // Temporary array for sorting |
3324 | // Int_t *sindexF = new Int_t[2*n]; |
3325 | // for (Int_t i = 0; i < n; i++) { |
3326 | // sindexF[i] = 0; |
3327 | // } |
3328 | // |
3329 | // TMath::Sort(n,inlist,sindexS,down); |
3330 | // |
3331 | // Int_t last = inlist[sindexS[0]]; |
3332 | // Int_t val = last; |
3333 | // sindexF[0] = 1; |
3334 | // sindexF[0+n] = last; |
3335 | // Int_t countPos = 0; |
3336 | // |
3337 | // // Find frequency |
3338 | // for (Int_t i = 1; i < n; i++) { |
3339 | // val = inlist[sindexS[i]]; |
3340 | // if (last == val) { |
3341 | // sindexF[countPos]++; |
3342 | // } |
3343 | // else { |
3344 | // countPos++; |
3345 | // sindexF[countPos+n] = val; |
3346 | // sindexF[countPos]++; |
3347 | // last = val; |
3348 | // } |
3349 | // } |
3350 | // if (last == val) { |
3351 | // countPos++; |
3352 | // } |
3353 | // |
3354 | // // Sort according frequency |
3355 | // TMath::Sort(countPos,sindexF,sindexS,kTRUE); |
3356 | // |
3357 | // for (Int_t i = 0; i < countPos; i++) { |
3358 | // outlist[2*i ] = sindexF[sindexS[i]+n]; |
3359 | // outlist[2*i+1] = sindexF[sindexS[i]]; |
3360 | // } |
3361 | // |
3362 | // delete [] sindexS; |
|