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e4f2f73d | 1 | /************************************************************************** |
29b87567 | 2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
e4f2f73d | 15 | |
16 | /* $Id$ */ | |
17 | ||
18 | //////////////////////////////////////////////////////////////////////////// | |
dd8059a8 | 19 | //// |
20 | // The TRD offline tracklet | |
21 | // | |
22 | // The running horse of the TRD reconstruction. The following tasks are preformed: | |
23 | // 1. Clusters attachment to tracks based on prior information stored at tracklet level (see AttachClusters) | |
24 | // 2. Clusters position recalculation based on track information (see GetClusterXY and Fit) | |
25 | // 3. Cluster error parametrization recalculation (see Fit) | |
26 | // 4. Linear track approximation (Fit) | |
27 | // 5. Optimal position (including z estimate for pad row cross tracklets) and covariance matrix of the track fit inside one TRD chamber (Fit) | |
28 | // 6. Tilt pad correction and systematic effects (GetCovAt) | |
29 | // 7. dEdx calculation (CookdEdx) | |
30 | // 8. PID probabilities estimation (CookPID) | |
31 | // | |
e4f2f73d | 32 | // Authors: // |
33 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
34 | // Markus Fasel <M.Fasel@gsi.de> // | |
35 | // // | |
36 | //////////////////////////////////////////////////////////////////////////// | |
37 | ||
38 | #include "TMath.h" | |
9dcc64cc | 39 | #include "TTreeStream.h" |
40 | #include "TGraphErrors.h" | |
e4f2f73d | 41 | |
42 | #include "AliLog.h" | |
43 | #include "AliMathBase.h" | |
4ecadb52 | 44 | #include "AliRieman.h" |
d937ad7a | 45 | #include "AliCDBManager.h" |
e4f2f73d | 46 | |
4ecadb52 | 47 | #include "AliTRDReconstructor.h" |
03cef9b2 | 48 | #include "AliTRDpadPlane.h" |
9dcc64cc | 49 | #include "AliTRDtransform.h" |
e4f2f73d | 50 | #include "AliTRDcluster.h" |
f3d3af1b | 51 | #include "AliTRDseedV1.h" |
52 | #include "AliTRDtrackV1.h" | |
e4f2f73d | 53 | #include "AliTRDcalibDB.h" |
eb38ed55 | 54 | #include "AliTRDchamberTimeBin.h" |
55 | #include "AliTRDtrackingChamber.h" | |
56 | #include "AliTRDtrackerV1.h" | |
e4f2f73d | 57 | #include "AliTRDrecoParam.h" |
a076fc2f | 58 | #include "AliTRDCommonParam.h" |
9dcc64cc | 59 | #include "AliTRDtrackletOflHelper.h" |
d937ad7a | 60 | |
9dcc64cc | 61 | #include "Cal/AliTRDCalTrkAttach.h" |
0906e73e | 62 | #include "Cal/AliTRDCalPID.h" |
d937ad7a | 63 | #include "Cal/AliTRDCalROC.h" |
64 | #include "Cal/AliTRDCalDet.h" | |
e4f2f73d | 65 | |
4ecadb52 | 66 | class AliTracker; |
67 | ||
e4f2f73d | 68 | ClassImp(AliTRDseedV1) |
69 | ||
70 | //____________________________________________________________________ | |
ae4e8b84 | 71 | AliTRDseedV1::AliTRDseedV1(Int_t det) |
3e778975 | 72 | :AliTRDtrackletBase() |
4d6aee34 | 73 | ,fkReconstructor(NULL) |
74 | ,fClusterIter(NULL) | |
e3cf3d02 | 75 | ,fExB(0.) |
76 | ,fVD(0.) | |
77 | ,fT0(0.) | |
78 | ,fS2PRF(0.) | |
79 | ,fDiffL(0.) | |
80 | ,fDiffT(0.) | |
ae4e8b84 | 81 | ,fClusterIdx(0) |
7c3eecb8 | 82 | ,fErrorMsg(0) |
3e778975 | 83 | ,fN(0) |
ae4e8b84 | 84 | ,fDet(det) |
b25a5e9e | 85 | ,fPt(0.) |
bcb6fb78 | 86 | ,fdX(0.) |
e3cf3d02 | 87 | ,fX0(0.) |
88 | ,fX(0.) | |
89 | ,fY(0.) | |
90 | ,fZ(0.) | |
91 | ,fS2Y(0.) | |
92 | ,fS2Z(0.) | |
e3cf3d02 | 93 | ,fChi2(0.) |
e4f2f73d | 94 | { |
95 | // | |
96 | // Constructor | |
97 | // | |
f301a656 | 98 | memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0])); |
8d2bec9e | 99 | memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*)); |
2eb10c34 | 100 | memset(fPad, 0, 4*sizeof(Float_t)); |
e3cf3d02 | 101 | fYref[0] = 0.; fYref[1] = 0.; |
102 | fZref[0] = 0.; fZref[1] = 0.; | |
103 | fYfit[0] = 0.; fYfit[1] = 0.; | |
104 | fZfit[0] = 0.; fZfit[1] = 0.; | |
8d2bec9e | 105 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
29b87567 | 106 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
e3cf3d02 | 107 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels |
108 | fLabels[2]=0; // number of different labels for tracklet | |
16cca13f | 109 | memset(fRefCov, 0, 7*sizeof(Double_t)); |
68f9b6bd | 110 | // stand alone curvature |
111 | fC[0] = 0.; fC[1] = 0.; | |
d937ad7a | 112 | // covariance matrix [diagonal] |
113 | // default sy = 200um and sz = 2.3 cm | |
114 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; | |
f29f13a6 | 115 | SetStandAlone(kFALSE); |
e4f2f73d | 116 | } |
117 | ||
118 | //____________________________________________________________________ | |
0906e73e | 119 | AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref) |
3e778975 | 120 | :AliTRDtrackletBase((AliTRDtrackletBase&)ref) |
4d6aee34 | 121 | ,fkReconstructor(NULL) |
122 | ,fClusterIter(NULL) | |
e3cf3d02 | 123 | ,fExB(0.) |
124 | ,fVD(0.) | |
125 | ,fT0(0.) | |
126 | ,fS2PRF(0.) | |
127 | ,fDiffL(0.) | |
128 | ,fDiffT(0.) | |
ae4e8b84 | 129 | ,fClusterIdx(0) |
7c3eecb8 | 130 | ,fErrorMsg(0) |
3e778975 | 131 | ,fN(0) |
e3cf3d02 | 132 | ,fDet(-1) |
b25a5e9e | 133 | ,fPt(0.) |
e3cf3d02 | 134 | ,fdX(0.) |
135 | ,fX0(0.) | |
136 | ,fX(0.) | |
137 | ,fY(0.) | |
138 | ,fZ(0.) | |
139 | ,fS2Y(0.) | |
140 | ,fS2Z(0.) | |
e3cf3d02 | 141 | ,fChi2(0.) |
e4f2f73d | 142 | { |
143 | // | |
144 | // Copy Constructor performing a deep copy | |
145 | // | |
e3cf3d02 | 146 | if(this != &ref){ |
147 | ref.Copy(*this); | |
148 | } | |
29b87567 | 149 | SetBit(kOwner, kFALSE); |
f29f13a6 | 150 | SetStandAlone(ref.IsStandAlone()); |
fbb2ea06 | 151 | } |
d9950a5a | 152 | |
0906e73e | 153 | |
e4f2f73d | 154 | //____________________________________________________________________ |
155 | AliTRDseedV1& AliTRDseedV1::operator=(const AliTRDseedV1 &ref) | |
156 | { | |
157 | // | |
158 | // Assignment Operator using the copy function | |
159 | // | |
160 | ||
29b87567 | 161 | if(this != &ref){ |
162 | ref.Copy(*this); | |
163 | } | |
221ab7e0 | 164 | SetBit(kOwner, kFALSE); |
165 | ||
29b87567 | 166 | return *this; |
e4f2f73d | 167 | } |
168 | ||
169 | //____________________________________________________________________ | |
170 | AliTRDseedV1::~AliTRDseedV1() | |
171 | { | |
172 | // | |
173 | // Destructor. The RecoParam object belongs to the underlying tracker. | |
174 | // | |
175 | ||
29b87567 | 176 | //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO"); |
e4f2f73d | 177 | |
e3cf3d02 | 178 | if(IsOwner()) { |
8d2bec9e | 179 | for(int itb=0; itb<kNclusters; itb++){ |
29b87567 | 180 | if(!fClusters[itb]) continue; |
181 | //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb)); | |
182 | delete fClusters[itb]; | |
4d6aee34 | 183 | fClusters[itb] = NULL; |
29b87567 | 184 | } |
e3cf3d02 | 185 | } |
e4f2f73d | 186 | } |
187 | ||
188 | //____________________________________________________________________ | |
189 | void AliTRDseedV1::Copy(TObject &ref) const | |
190 | { | |
191 | // | |
192 | // Copy function | |
193 | // | |
194 | ||
29b87567 | 195 | //AliInfo(""); |
196 | AliTRDseedV1 &target = (AliTRDseedV1 &)ref; | |
197 | ||
4d6aee34 | 198 | target.fkReconstructor = fkReconstructor; |
199 | target.fClusterIter = NULL; | |
e3cf3d02 | 200 | target.fExB = fExB; |
201 | target.fVD = fVD; | |
202 | target.fT0 = fT0; | |
203 | target.fS2PRF = fS2PRF; | |
204 | target.fDiffL = fDiffL; | |
205 | target.fDiffT = fDiffT; | |
ae4e8b84 | 206 | target.fClusterIdx = 0; |
7c3eecb8 | 207 | target.fErrorMsg = fErrorMsg; |
3e778975 | 208 | target.fN = fN; |
ae4e8b84 | 209 | target.fDet = fDet; |
b25a5e9e | 210 | target.fPt = fPt; |
29b87567 | 211 | target.fdX = fdX; |
e3cf3d02 | 212 | target.fX0 = fX0; |
213 | target.fX = fX; | |
214 | target.fY = fY; | |
215 | target.fZ = fZ; | |
216 | target.fS2Y = fS2Y; | |
217 | target.fS2Z = fS2Z; | |
e3cf3d02 | 218 | target.fChi2 = fChi2; |
29b87567 | 219 | |
8d2bec9e | 220 | memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t)); |
221 | memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*)); | |
2eb10c34 | 222 | memcpy(target.fPad, fPad, 4*sizeof(Float_t)); |
e3cf3d02 | 223 | target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1]; |
224 | target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1]; | |
225 | target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1]; | |
226 | target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1]; | |
8d2bec9e | 227 | memcpy(target.fdEdx, fdEdx, kNslices*sizeof(Float_t)); |
e3cf3d02 | 228 | memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t)); |
229 | memcpy(target.fLabels, fLabels, 3*sizeof(Int_t)); | |
16cca13f | 230 | memcpy(target.fRefCov, fRefCov, 7*sizeof(Double_t)); |
68f9b6bd | 231 | target.fC[0] = fC[0]; target.fC[1] = fC[1]; |
e3cf3d02 | 232 | memcpy(target.fCov, fCov, 3*sizeof(Double_t)); |
29b87567 | 233 | |
e3cf3d02 | 234 | TObject::Copy(ref); |
e4f2f73d | 235 | } |
236 | ||
0906e73e | 237 | |
4ecadb52 | 238 | //____________________________________________________________ |
239 | void AliTRDseedV1::Init(const AliRieman *rieman) | |
240 | { | |
241 | // Initialize this tracklet using the riemann fit information | |
242 | ||
243 | ||
244 | fZref[0] = rieman->GetZat(fX0); | |
245 | fZref[1] = rieman->GetDZat(fX0); | |
246 | fYref[0] = rieman->GetYat(fX0); | |
247 | fYref[1] = rieman->GetDYat(fX0); | |
248 | if(fkReconstructor && fkReconstructor->IsHLT()){ | |
249 | fRefCov[0] = 1; | |
250 | fRefCov[2] = 10; | |
251 | }else{ | |
252 | fRefCov[0] = rieman->GetErrY(fX0); | |
253 | fRefCov[2] = rieman->GetErrZ(fX0); | |
254 | } | |
255 | fC[0] = rieman->GetC(); | |
256 | fChi2 = rieman->GetChi2(); | |
257 | } | |
258 | ||
259 | ||
0906e73e | 260 | //____________________________________________________________ |
f3d3af1b | 261 | Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track) |
0906e73e | 262 | { |
263 | // Initialize this tracklet using the track information | |
264 | // | |
265 | // Parameters: | |
266 | // track - the TRD track used to initialize the tracklet | |
267 | // | |
268 | // Detailed description | |
269 | // The function sets the starting point and direction of the | |
270 | // tracklet according to the information from the TRD track. | |
271 | // | |
272 | // Caution | |
273 | // The TRD track has to be propagated to the beginning of the | |
274 | // chamber where the tracklet will be constructed | |
275 | // | |
276 | ||
29b87567 | 277 | Double_t y, z; |
278 | if(!track->GetProlongation(fX0, y, z)) return kFALSE; | |
16cca13f | 279 | Update(track); |
29b87567 | 280 | return kTRUE; |
0906e73e | 281 | } |
282 | ||
bcb6fb78 | 283 | |
e3cf3d02 | 284 | //_____________________________________________________________________________ |
980d5a2a | 285 | void AliTRDseedV1::Reset(Option_t *opt) |
e3cf3d02 | 286 | { |
980d5a2a | 287 | // |
288 | // Reset seed. If option opt="c" is given only cluster arrays are cleared. | |
289 | // | |
290 | for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1; | |
291 | memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*)); | |
560e5c05 | 292 | fN=0; SetBit(kRowCross, kFALSE); |
980d5a2a | 293 | if(strcmp(opt, "c")==0) return; |
294 | ||
e3cf3d02 | 295 | fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.; |
296 | fDiffL=0.;fDiffT=0.; | |
3e778975 | 297 | fClusterIdx=0; |
7c3eecb8 | 298 | fErrorMsg = 0; |
dd8059a8 | 299 | fDet=-1; |
b25a5e9e | 300 | fPt=0.; |
e3cf3d02 | 301 | fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.; |
302 | fS2Y=0.; fS2Z=0.; | |
68f9b6bd | 303 | fC[0]=0.; fC[1]=0.; |
304 | fChi2 = 0.; | |
e3cf3d02 | 305 | |
2eb10c34 | 306 | memset(fPad, 0, 4*sizeof(Float_t)); |
e3cf3d02 | 307 | fYref[0] = 0.; fYref[1] = 0.; |
308 | fZref[0] = 0.; fZref[1] = 0.; | |
309 | fYfit[0] = 0.; fYfit[1] = 0.; | |
310 | fZfit[0] = 0.; fZfit[1] = 0.; | |
8d2bec9e | 311 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
e3cf3d02 | 312 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
313 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels | |
314 | fLabels[2]=0; // number of different labels for tracklet | |
16cca13f | 315 | memset(fRefCov, 0, 7*sizeof(Double_t)); |
e3cf3d02 | 316 | // covariance matrix [diagonal] |
317 | // default sy = 200um and sz = 2.3 cm | |
318 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; | |
319 | } | |
320 | ||
b1957d3c | 321 | //____________________________________________________________________ |
16cca13f | 322 | void AliTRDseedV1::Update(const AliTRDtrackV1 *trk) |
b1957d3c | 323 | { |
324 | // update tracklet reference position from the TRD track | |
b1957d3c | 325 | |
e3cf3d02 | 326 | Double_t fSnp = trk->GetSnp(); |
327 | Double_t fTgl = trk->GetTgl(); | |
b25a5e9e | 328 | fPt = trk->Pt(); |
bfd20868 | 329 | Double_t norm =1./TMath::Sqrt((1.-fSnp)*(1.+fSnp)); |
1fd9389f | 330 | fYref[1] = fSnp*norm; |
331 | fZref[1] = fTgl*norm; | |
b1957d3c | 332 | SetCovRef(trk->GetCovariance()); |
333 | ||
334 | Double_t dx = trk->GetX() - fX0; | |
335 | fYref[0] = trk->GetY() - dx*fYref[1]; | |
336 | fZref[0] = trk->GetZ() - dx*fZref[1]; | |
337 | } | |
338 | ||
e3cf3d02 | 339 | //_____________________________________________________________________________ |
340 | void AliTRDseedV1::UpdateUsed() | |
341 | { | |
342 | // | |
f29f13a6 | 343 | // Calculate number of used clusers in the tracklet |
e3cf3d02 | 344 | // |
345 | ||
3e778975 | 346 | Int_t nused = 0, nshared = 0; |
8d2bec9e | 347 | for (Int_t i = kNclusters; i--; ) { |
e3cf3d02 | 348 | if (!fClusters[i]) continue; |
3e778975 | 349 | if(fClusters[i]->IsUsed()){ |
350 | nused++; | |
351 | } else if(fClusters[i]->IsShared()){ | |
352 | if(IsStandAlone()) nused++; | |
353 | else nshared++; | |
354 | } | |
e3cf3d02 | 355 | } |
3e778975 | 356 | SetNUsed(nused); |
357 | SetNShared(nshared); | |
e3cf3d02 | 358 | } |
359 | ||
360 | //_____________________________________________________________________________ | |
361 | void AliTRDseedV1::UseClusters() | |
362 | { | |
363 | // | |
364 | // Use clusters | |
365 | // | |
f29f13a6 | 366 | // In stand alone mode: |
367 | // Clusters which are marked as used or shared from another track are | |
368 | // removed from the tracklet | |
369 | // | |
370 | // In barrel mode: | |
371 | // - Clusters which are used by another track become shared | |
372 | // - Clusters which are attached to a kink track become shared | |
373 | // | |
e3cf3d02 | 374 | AliTRDcluster **c = &fClusters[0]; |
8d2bec9e | 375 | for (Int_t ic=kNclusters; ic--; c++) { |
e3cf3d02 | 376 | if(!(*c)) continue; |
f29f13a6 | 377 | if(IsStandAlone()){ |
378 | if((*c)->IsShared() || (*c)->IsUsed()){ | |
b82b4de1 | 379 | if((*c)->IsShared()) SetNShared(GetNShared()-1); |
380 | else SetNUsed(GetNUsed()-1); | |
4d6aee34 | 381 | (*c) = NULL; |
f29f13a6 | 382 | fIndexes[ic] = -1; |
3e778975 | 383 | SetN(GetN()-1); |
3e778975 | 384 | continue; |
f29f13a6 | 385 | } |
3e778975 | 386 | } else { |
f29f13a6 | 387 | if((*c)->IsUsed() || IsKink()){ |
3e778975 | 388 | (*c)->SetShared(); |
389 | continue; | |
f29f13a6 | 390 | } |
391 | } | |
392 | (*c)->Use(); | |
e3cf3d02 | 393 | } |
394 | } | |
395 | ||
396 | ||
f29f13a6 | 397 | |
bcb6fb78 | 398 | //____________________________________________________________________ |
399 | void AliTRDseedV1::CookdEdx(Int_t nslices) | |
400 | { | |
401 | // Calculates average dE/dx for all slices and store them in the internal array fdEdx. | |
402 | // | |
403 | // Parameters: | |
404 | // nslices : number of slices for which dE/dx should be calculated | |
405 | // Output: | |
406 | // store results in the internal array fdEdx. This can be accessed with the method | |
407 | // AliTRDseedV1::GetdEdx() | |
408 | // | |
409 | // Detailed description | |
410 | // Calculates average dE/dx for all slices. Depending on the PID methode | |
411 | // the number of slices can be 3 (LQ) or 8(NN). | |
3ee48d6e | 412 | // The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t)) |
bcb6fb78 | 413 | // |
414 | // The following effects are included in the calculation: | |
415 | // 1. calibration values for t0 and vdrift (using x coordinate to calculate slice) | |
416 | // 2. cluster sharing (optional see AliTRDrecoParam::SetClusterSharing()) | |
417 | // 3. cluster size | |
418 | // | |
419 | ||
8d2bec9e | 420 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
e73abf77 | 421 | const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
29b87567 | 422 | |
0d80a563 | 423 | AliTRDcluster *c(NULL); |
424 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ | |
425 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; | |
426 | Float_t dx = TMath::Abs(fX0 - c->GetX()); | |
427 | ||
29b87567 | 428 | // Filter clusters for dE/dx calculation |
0d80a563 | 429 | |
29b87567 | 430 | // 1.consider calibration effects for slice determination |
0d80a563 | 431 | Int_t slice; |
432 | if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber() | |
433 | slice = Int_t(dx * nslices / kDriftLength); | |
434 | } else slice = c->GetX() < fX0 ? nslices-1 : 0; | |
435 | ||
e73abf77 | 436 | |
29b87567 | 437 | // 2. take sharing into account |
3e778975 | 438 | Float_t w = /*c->IsShared() ? .5 :*/ 1.; |
0d80a563 | 439 | |
29b87567 | 440 | // 3. take into account large clusters TODO |
441 | //w *= c->GetNPads() > 3 ? .8 : 1.; | |
85b917f6 | 442 | |
0d80a563 | 443 | //CHECK !!! |
444 | fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic]; | |
445 | } // End of loop over clusters | |
bcb6fb78 | 446 | } |
447 | ||
e3cf3d02 | 448 | //_____________________________________________________________________________ |
449 | void AliTRDseedV1::CookLabels() | |
450 | { | |
451 | // | |
452 | // Cook 2 labels for seed | |
453 | // | |
454 | ||
455 | Int_t labels[200]; | |
456 | Int_t out[200]; | |
457 | Int_t nlab = 0; | |
8d2bec9e | 458 | for (Int_t i = 0; i < kNclusters; i++) { |
e3cf3d02 | 459 | if (!fClusters[i]) continue; |
460 | for (Int_t ilab = 0; ilab < 3; ilab++) { | |
461 | if (fClusters[i]->GetLabel(ilab) >= 0) { | |
462 | labels[nlab] = fClusters[i]->GetLabel(ilab); | |
463 | nlab++; | |
464 | } | |
465 | } | |
466 | } | |
467 | ||
fac58f00 | 468 | fLabels[2] = AliMathBase::Freq(nlab,labels,out,kTRUE); |
e3cf3d02 | 469 | fLabels[0] = out[0]; |
470 | if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2]; | |
471 | } | |
472 | ||
2eb10c34 | 473 | //____________________________________________________________ |
474 | Float_t AliTRDseedV1::GetAnodeWireOffset(Float_t zt) | |
475 | { | |
4ecadb52 | 476 | // Find position inside the amplification cell for reading drift velocity map |
477 | ||
2eb10c34 | 478 | Float_t d = fPad[3] - zt; |
479 | if(d<0.){ | |
480 | AliError(Form("Fail AnodeWireOffset calculation z0[%+7.2f] zt[%+7.2f] d[%+7.2f].", fPad[3], zt, d)); | |
481 | return 0.125; | |
482 | } | |
483 | d -= ((Int_t)(2 * d)) / 2.0; | |
484 | if(d > 0.25) d = 0.5 - d; | |
485 | return d; | |
486 | } | |
487 | ||
e3cf3d02 | 488 | |
85b917f6 | 489 | //____________________________________________________________________ |
9dcc64cc | 490 | Float_t AliTRDseedV1::GetCharge(Bool_t useOutliers) const |
85b917f6 | 491 | { |
492 | // Computes total charge attached to tracklet. If "useOutliers" is set clusters | |
493 | // which are not in chamber are also used (default false) | |
494 | ||
495 | AliTRDcluster *c(NULL); Float_t qt(0.); | |
496 | for(int ic=0; ic<kNclusters; ic++){ | |
497 | if(!(c=fClusters[ic])) continue; | |
498 | if(c->IsInChamber() && !useOutliers) continue; | |
499 | qt += TMath::Abs(c->GetQ()); | |
500 | } | |
501 | return qt; | |
502 | } | |
503 | ||
e1bcf0af | 504 | //____________________________________________________________________ |
505 | Bool_t AliTRDseedV1::GetEstimatedCrossPoint(Float_t &x, Float_t &z) const | |
506 | { | |
507 | // Algorithm to estimate cross point in the x-z plane for pad row cross tracklets. | |
508 | // Returns true in case of success. | |
509 | if(!IsRowCross()) return kFALSE; | |
510 | ||
511 | x=0.; z=0.; | |
512 | AliTRDcluster *c(NULL); | |
513 | // Find radial range for first row | |
514 | Float_t x1[] = {0., 1.e3}; | |
515 | for(int ic=0; ic<kNtb; ic++){ | |
516 | if(!(c=fClusters[ic])) continue; | |
517 | if(!c->IsInChamber()) continue; | |
518 | if(c->GetX() <= x1[1]) x1[1] = c->GetX(); | |
519 | if(c->GetX() >= x1[0]) x1[0] = c->GetX(); | |
520 | z=c->GetZ(); | |
521 | } | |
522 | if((x1[0] - x1[1])<1.e-5) return kFALSE; | |
523 | ||
524 | // Find radial range for second row | |
525 | Bool_t kZ(kFALSE); | |
526 | Float_t x2[] = {0., 1.e3}; | |
527 | for(int ic=kNtb; ic<kNclusters; ic++){ | |
528 | if(!(c=fClusters[ic])) continue; | |
529 | if(!c->IsInChamber()) continue; | |
530 | if(c->GetX() <= x2[1]) x2[1] = c->GetX(); | |
531 | if(c->GetX() >= x2[0]) x2[0] = c->GetX(); | |
532 | if(!kZ){ | |
533 | z+=c->GetZ(); | |
534 | z*=0.5; | |
535 | kZ=kTRUE; | |
536 | } | |
537 | } | |
538 | if((x2[0] - x2[1])<1.e-5) return kFALSE; | |
539 | ||
540 | // Find intersection of the 2 radial regions | |
541 | x = 0.5*((x1[0]+x1[1] > x2[0]+x2[1]) ? (x1[1]+x2[0]) : (x1[0]+x2[1])); | |
542 | return kTRUE; | |
543 | } | |
544 | ||
9dcc64cc | 545 | //____________________________________________________________________ |
546 | Float_t AliTRDseedV1::GetdQdl() const | |
547 | { | |
548 | // Calculate total charge / tracklet length for 1D PID | |
549 | // | |
550 | Float_t Q = GetCharge(kTRUE); | |
551 | return Q/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]); | |
552 | } | |
553 | ||
bcb6fb78 | 554 | //____________________________________________________________________ |
0b433f72 | 555 | Float_t AliTRDseedV1::GetdQdl(Int_t ic, Float_t *dl) const |
bcb6fb78 | 556 | { |
3ee48d6e | 557 | // Using the linear approximation of the track inside one TRD chamber (TRD tracklet) |
558 | // the charge per unit length can be written as: | |
559 | // BEGIN_LATEX | |
500851ab | 560 | // #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dz}{dx}}^{2}_{ref}}} |
3ee48d6e | 561 | // END_LATEX |
562 | // where qc is the total charge collected in the current time bin and dx is the length | |
0b433f72 | 563 | // of the time bin. |
564 | // The following correction are applied : | |
565 | // - charge : pad row cross corrections | |
566 | // [diffusion and TRF assymetry] TODO | |
567 | // - dx : anisochronity, track inclination - see Fit and AliTRDcluster::GetXloc() | |
568 | // and AliTRDcluster::GetYloc() for the effects taken into account | |
3ee48d6e | 569 | // |
0fa1a8ee | 570 | //Begin_Html |
571 | //<img src="TRD/trackletDQDT.gif"> | |
572 | //End_Html | |
573 | // In the picture the energy loss measured on the tracklet as a function of drift time [left] and respectively | |
574 | // drift length [right] for different particle species is displayed. | |
3ee48d6e | 575 | // Author : Alex Bercuci <A.Bercuci@gsi.de> |
576 | // | |
577 | Float_t dq = 0.; | |
5d401b45 | 578 | // check whether both clusters are inside the chamber |
579 | Bool_t hasClusterInChamber = kFALSE; | |
580 | if(fClusters[ic] && fClusters[ic]->IsInChamber()){ | |
581 | hasClusterInChamber = kTRUE; | |
1742f24c | 582 | dq += TMath::Abs(fClusters[ic]->GetQ()); |
b30d8c09 | 583 | } |
584 | if(fClusters[ic+kNtb] && fClusters[ic+kNtb]->IsInChamber()){ | |
5d401b45 | 585 | hasClusterInChamber = kTRUE; |
586 | dq += TMath::Abs(fClusters[ic+kNtb]->GetQ()); | |
1742f24c | 587 | } |
5d401b45 | 588 | if(!hasClusterInChamber) return 0.; |
0b433f72 | 589 | if(dq<1.e-3) return 0.; |
3ee48d6e | 590 | |
a2abcbc5 | 591 | Double_t dx = fdX; |
592 | if(ic-1>=0 && ic+1<kNtb){ | |
593 | Float_t x2(0.), x1(0.); | |
5d401b45 | 594 | // try to estimate upper radial position (find the cluster which is inside the chamber) |
595 | if(fClusters[ic-1] && fClusters[ic-1]->IsInChamber()) x2 = fClusters[ic-1]->GetX(); | |
596 | else if(fClusters[ic-1+kNtb] && fClusters[ic-1+kNtb]->IsInChamber()) x2 = fClusters[ic-1+kNtb]->GetX(); | |
597 | else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x2 = fClusters[ic]->GetX()+fdX; | |
a2abcbc5 | 598 | else x2 = fClusters[ic+kNtb]->GetX()+fdX; |
5d401b45 | 599 | // try to estimate lower radial position (find the cluster which is inside the chamber) |
600 | if(fClusters[ic+1] && fClusters[ic+1]->IsInChamber()) x1 = fClusters[ic+1]->GetX(); | |
601 | else if(fClusters[ic+1+kNtb] && fClusters[ic+1+kNtb]->IsInChamber()) x1 = fClusters[ic+1+kNtb]->GetX(); | |
602 | else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x1 = fClusters[ic]->GetX()-fdX; | |
a2abcbc5 | 603 | else x1 = fClusters[ic+kNtb]->GetX()-fdX; |
604 | ||
605 | dx = .5*(x2 - x1); | |
606 | } | |
0b433f72 | 607 | dx *= TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]); |
0b433f72 | 608 | if(dl) (*dl) = dx; |
283604d2 | 609 | if(dx>1.e-9) return dq/dx; |
610 | else return 0.; | |
bcb6fb78 | 611 | } |
612 | ||
0b433f72 | 613 | //____________________________________________________________ |
614 | Float_t AliTRDseedV1::GetMomentum(Float_t *err) const | |
615 | { | |
616 | // Returns momentum of the track after update with the current tracklet as: | |
617 | // BEGIN_LATEX | |
618 | // p=#frac{1}{1/p_{t}} #sqrt{1+tgl^{2}} | |
619 | // END_LATEX | |
620 | // and optionally the momentum error (if err is not null). | |
621 | // The estimated variance of the momentum is given by: | |
622 | // BEGIN_LATEX | |
623 | // #sigma_{p}^{2} = (#frac{dp}{dp_{t}})^{2} #sigma_{p_{t}}^{2}+(#frac{dp}{dtgl})^{2} #sigma_{tgl}^{2}+2#frac{dp}{dp_{t}}#frac{dp}{dtgl} cov(tgl,1/p_{t}) | |
624 | // END_LATEX | |
625 | // which can be simplified to | |
626 | // BEGIN_LATEX | |
627 | // #sigma_{p}^{2} = p^{2}p_{t}^{4}tgl^{2}#sigma_{tgl}^{2}-2p^{2}p_{t}^{3}tgl cov(tgl,1/p_{t})+p^{2}p_{t}^{2}#sigma_{1/p_{t}}^{2} | |
628 | // END_LATEX | |
629 | // | |
630 | ||
631 | Double_t p = fPt*TMath::Sqrt(1.+fZref[1]*fZref[1]); | |
632 | Double_t p2 = p*p; | |
633 | Double_t tgl2 = fZref[1]*fZref[1]; | |
634 | Double_t pt2 = fPt*fPt; | |
635 | if(err){ | |
636 | Double_t s2 = | |
637 | p2*tgl2*pt2*pt2*fRefCov[4] | |
638 | -2.*p2*fZref[1]*fPt*pt2*fRefCov[5] | |
639 | +p2*pt2*fRefCov[6]; | |
640 | (*err) = TMath::Sqrt(s2); | |
641 | } | |
642 | return p; | |
643 | } | |
644 | ||
9dcc64cc | 645 | |
b453ef55 | 646 | //____________________________________________________________________ |
647 | Float_t AliTRDseedV1::GetOccupancyTB() const | |
648 | { | |
649 | // Returns procentage of TB occupied by clusters | |
650 | ||
651 | Int_t n(0); | |
652 | AliTRDcluster *c(NULL); | |
653 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ | |
654 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; | |
655 | n++; | |
656 | } | |
657 | ||
658 | return Float_t(n)/AliTRDtrackerV1::GetNTimeBins(); | |
659 | } | |
0b433f72 | 660 | |
0906e73e | 661 | //____________________________________________________________________ |
3e778975 | 662 | Float_t* AliTRDseedV1::GetProbability(Bool_t force) |
0906e73e | 663 | { |
3e778975 | 664 | if(!force) return &fProb[0]; |
4d6aee34 | 665 | if(!CookPID()) return NULL; |
3e778975 | 666 | return &fProb[0]; |
667 | } | |
668 | ||
669 | //____________________________________________________________ | |
670 | Bool_t AliTRDseedV1::CookPID() | |
671 | { | |
0906e73e | 672 | // Fill probability array for tracklet from the DB. |
673 | // | |
674 | // Parameters | |
675 | // | |
676 | // Output | |
4d6aee34 | 677 | // returns pointer to the probability array and NULL if missing DB access |
0906e73e | 678 | // |
2a3191bb | 679 | // Retrieve PID probabilities for e+-, mu+-, K+-, pi+- and p+- from the DB according to tracklet information: |
680 | // - estimated momentum at tracklet reference point | |
681 | // - dE/dx measurements | |
682 | // - tracklet length | |
683 | // - TRD layer | |
684 | // According to the steering settings specified in the reconstruction one of the following methods are used | |
685 | // - Neural Network [default] - option "nn" | |
686 | // - 2D Likelihood - option "!nn" | |
0906e73e | 687 | |
0906e73e | 688 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
689 | if (!calibration) { | |
690 | AliError("No access to calibration data"); | |
3e778975 | 691 | return kFALSE; |
0906e73e | 692 | } |
693 | ||
4d6aee34 | 694 | if (!fkReconstructor) { |
3a039a31 | 695 | AliError("Reconstructor not set."); |
3e778975 | 696 | return kFALSE; |
4ba1d6ae | 697 | } |
698 | ||
0906e73e | 699 | // Retrieve the CDB container class with the parametric detector response |
4d6aee34 | 700 | const AliTRDCalPID *pd = calibration->GetPIDObject(fkReconstructor->GetPIDMethod()); |
0906e73e | 701 | if (!pd) { |
702 | AliError("No access to AliTRDCalPID object"); | |
3e778975 | 703 | return kFALSE; |
0906e73e | 704 | } |
10f75631 | 705 | |
29b87567 | 706 | // calculate tracklet length TO DO |
560e5c05 | 707 | Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())/ TMath::Sqrt((1.0 - GetSnp()*GetSnp()) / (1.0 + GetTgl()*GetTgl())); |
0906e73e | 708 | |
709 | //calculate dE/dx | |
9ded305e | 710 | CookdEdx(AliTRDCalPID::kNSlicesNN); |
711 | AliDebug(4, Form("p=%6.4f[GeV/c] dEdx{%7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f} l=%4.2f[cm]", GetMomentum(), fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7], length)); | |
0217fcd0 | 712 | |
0906e73e | 713 | // Sets the a priori probabilities |
11d80e40 | 714 | Bool_t kPIDNN(fkReconstructor->GetPIDMethod()==AliTRDpidUtil::kNN); |
f83cd814 | 715 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) |
11d80e40 | 716 | fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, kPIDNN?GetPlane():fkReconstructor->GetRecoParam()->GetPIDLQslices()); |
f301a656 | 717 | |
3e778975 | 718 | return kTRUE; |
0906e73e | 719 | } |
720 | ||
e4f2f73d | 721 | //____________________________________________________________________ |
722 | Float_t AliTRDseedV1::GetQuality(Bool_t kZcorr) const | |
723 | { | |
724 | // | |
725 | // Returns a quality measurement of the current seed | |
726 | // | |
727 | ||
dd8059a8 | 728 | Float_t zcorr = kZcorr ? GetTilt() * (fZfit[0] - fZref[0]) : 0.; |
29b87567 | 729 | return |
3e778975 | 730 | .5 * TMath::Abs(18.0 - GetN()) |
29b87567 | 731 | + 10.* TMath::Abs(fYfit[1] - fYref[1]) |
732 | + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr) | |
dd8059a8 | 733 | + 2. * TMath::Abs(fZfit[0] - fZref[0]) / GetPadLength(); |
e4f2f73d | 734 | } |
735 | ||
0906e73e | 736 | //____________________________________________________________________ |
d937ad7a | 737 | void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const |
0906e73e | 738 | { |
d937ad7a | 739 | // Computes covariance in the y-z plane at radial point x (in tracking coordinates) |
740 | // and returns the results in the preallocated array cov[3] as : | |
741 | // cov[0] = Var(y) | |
742 | // cov[1] = Cov(yz) | |
743 | // cov[2] = Var(z) | |
744 | // | |
745 | // Details | |
746 | // | |
747 | // For the linear transformation | |
748 | // BEGIN_LATEX | |
749 | // Y = T_{x} X^{T} | |
750 | // END_LATEX | |
751 | // The error propagation has the general form | |
752 | // BEGIN_LATEX | |
753 | // C_{Y} = T_{x} C_{X} T_{x}^{T} | |
754 | // END_LATEX | |
755 | // We apply this formula 2 times. First to calculate the covariance of the tracklet | |
756 | // at point x we consider: | |
757 | // BEGIN_LATEX | |
758 | // T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}} | |
759 | // END_LATEX | |
760 | // and secondly to take into account the tilt angle | |
761 | // BEGIN_LATEX | |
762 | // T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}} | |
763 | // END_LATEX | |
764 | // | |
765 | // using simple trigonometrics one can write for this last case | |
766 | // BEGIN_LATEX | |
767 | // C_{Y}=#frac{1}{1+tg^{2}#alpha} #(){#splitline{(#sigma_{y}^{2}+tg^{2}#alpha#sigma_{z}^{2}) __ tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2})}{tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2}) __ (#sigma_{z}^{2}+tg^{2}#alpha#sigma_{y}^{2})}} | |
768 | // END_LATEX | |
769 | // which can be aproximated for small alphas (2 deg) with | |
770 | // BEGIN_LATEX | |
771 | // C_{Y}=#(){#splitline{#sigma_{y}^{2} __ (#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha}{((#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha __ #sigma_{z}^{2}}} | |
772 | // END_LATEX | |
773 | // | |
774 | // before applying the tilt rotation we also apply systematic uncertainties to the tracklet | |
775 | // position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might | |
776 | // account for extra misalignment/miscalibration uncertainties. | |
777 | // | |
778 | // Author : | |
779 | // Alex Bercuci <A.Bercuci@gsi.de> | |
780 | // Date : Jan 8th 2009 | |
781 | // | |
b1957d3c | 782 | |
783 | ||
d937ad7a | 784 | Double_t xr = fX0-x; |
785 | Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2]; | |
b72f4eaf | 786 | Double_t sz2 = fS2Z; |
787 | //GetPadLength()*GetPadLength()/12.; | |
0906e73e | 788 | |
d937ad7a | 789 | // insert systematic uncertainties |
4d6aee34 | 790 | if(fkReconstructor){ |
bb2db46c | 791 | Double_t sys[15]; memset(sys, 0, 15*sizeof(Double_t)); |
4d6aee34 | 792 | fkReconstructor->GetRecoParam()->GetSysCovMatrix(sys); |
bb2db46c | 793 | sy2 += sys[0]; |
794 | sz2 += sys[1]; | |
795 | } | |
2eb10c34 | 796 | |
797 | // rotate covariance matrix if no RC | |
798 | if(!IsRowCross()){ | |
799 | Double_t t2 = GetTilt()*GetTilt(); | |
800 | Double_t correction = 1./(1. + t2); | |
801 | cov[0] = (sy2+t2*sz2)*correction; | |
802 | cov[1] = GetTilt()*(sz2 - sy2)*correction; | |
803 | cov[2] = (t2*sy2+sz2)*correction; | |
804 | } else { | |
805 | cov[0] = sy2; cov[1] = 0.; cov[2] = sy2; | |
806 | } | |
807 | ||
808 | AliDebug(4, Form("C(%6.1f %+6.3f %6.1f) RC[%c]", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?'y':'n')); | |
d937ad7a | 809 | } |
eb38ed55 | 810 | |
bb2db46c | 811 | //____________________________________________________________ |
66765e8e | 812 | Int_t AliTRDseedV1::GetCovSqrt(const Double_t * const c, Double_t *d) |
bb2db46c | 813 | { |
814 | // Helper function to calculate the square root of the covariance matrix. | |
815 | // The input matrix is stored in the vector c and the result in the vector d. | |
41b7c7b6 | 816 | // Both arrays have to be initialized by the user with at least 3 elements. Return negative in case of failure. |
bb2db46c | 817 | // |
ec3f0161 | 818 | // For calculating the square root of the symmetric matrix c |
819 | // the following relation is used: | |
bb2db46c | 820 | // BEGIN_LATEX |
ec3f0161 | 821 | // C^{1/2} = VD^{1/2}V^{-1} |
bb2db46c | 822 | // END_LATEX |
41b7c7b6 | 823 | // with V being the matrix with the n eigenvectors as columns. |
ec3f0161 | 824 | // In case C is symmetric the followings are true: |
825 | // - matrix D is diagonal with the diagonal given by the eigenvalues of C | |
41b7c7b6 | 826 | // - V = V^{-1} |
bb2db46c | 827 | // |
828 | // Author A.Bercuci <A.Bercuci@gsi.de> | |
829 | // Date Mar 19 2009 | |
830 | ||
66765e8e | 831 | const Double_t kZero(1.e-20); |
4d6aee34 | 832 | Double_t l[2], // eigenvalues |
833 | v[3]; // eigenvectors | |
bb2db46c | 834 | // the secular equation and its solution : |
835 | // (c[0]-L)(c[2]-L)-c[1]^2 = 0 | |
836 | // L^2 - L*Tr(c)+DET(c) = 0 | |
837 | // L12 = [Tr(c) +- sqrt(Tr(c)^2-4*DET(c))]/2 | |
4d6aee34 | 838 | Double_t tr = c[0]+c[2], // trace |
839 | det = c[0]*c[2]-c[1]*c[1]; // determinant | |
66765e8e | 840 | if(TMath::Abs(det)<kZero) return 1; |
4d6aee34 | 841 | Double_t dd = TMath::Sqrt(tr*tr - 4*det); |
66765e8e | 842 | l[0] = .5*(tr + dd*(c[0]>c[2]?-1.:1.)); |
843 | l[1] = .5*(tr + dd*(c[0]>c[2]?1.:-1.)); | |
844 | if(l[0]<kZero || l[1]<kZero) return 2; | |
41b7c7b6 | 845 | // the sym V matrix |
846 | // | v00 v10| | |
847 | // | v10 v11| | |
66765e8e | 848 | Double_t den = (l[0]-c[0])*(l[0]-c[0])+c[1]*c[1]; |
849 | if(den<kZero){ // almost diagonal | |
850 | v[0] = TMath::Sign(0., c[1]); | |
851 | v[1] = TMath::Sign(1., (l[0]-c[0])); | |
852 | v[2] = TMath::Sign(0., c[1]*(l[0]-c[0])*(l[1]-c[2])); | |
853 | } else { | |
854 | Double_t tmp = 1./TMath::Sqrt(den); | |
855 | v[0] = c[1]* tmp; | |
856 | v[1] = (l[0]-c[0])*tmp; | |
857 | if(TMath::Abs(l[1]-c[2])<kZero) v[2] = TMath::Sign(v[0]*(l[0]-c[0])/kZero, (l[1]-c[2])); | |
858 | else v[2] = v[0]*(l[0]-c[0])/(l[1]-c[2]); | |
859 | } | |
41b7c7b6 | 860 | // the VD^{1/2}V is: |
4d6aee34 | 861 | l[0] = TMath::Sqrt(l[0]); l[1] = TMath::Sqrt(l[1]); |
862 | d[0] = v[0]*v[0]*l[0]+v[1]*v[1]*l[1]; | |
863 | d[1] = v[0]*v[1]*l[0]+v[1]*v[2]*l[1]; | |
864 | d[2] = v[1]*v[1]*l[0]+v[2]*v[2]*l[1]; | |
bb2db46c | 865 | |
66765e8e | 866 | return 0; |
bb2db46c | 867 | } |
868 | ||
869 | //____________________________________________________________ | |
4d6aee34 | 870 | Double_t AliTRDseedV1::GetCovInv(const Double_t * const c, Double_t *d) |
bb2db46c | 871 | { |
872 | // Helper function to calculate the inverse of the covariance matrix. | |
873 | // The input matrix is stored in the vector c and the result in the vector d. | |
874 | // Both arrays have to be initialized by the user with at least 3 elements | |
875 | // The return value is the determinant or 0 in case of singularity. | |
876 | // | |
877 | // Author A.Bercuci <A.Bercuci@gsi.de> | |
878 | // Date Mar 19 2009 | |
879 | ||
4d6aee34 | 880 | Double_t det = c[0]*c[2] - c[1]*c[1]; |
881 | if(TMath::Abs(det)<1.e-20) return 0.; | |
882 | Double_t invDet = 1./det; | |
883 | d[0] = c[2]*invDet; | |
884 | d[1] =-c[1]*invDet; | |
885 | d[2] = c[0]*invDet; | |
886 | return det; | |
bb2db46c | 887 | } |
0906e73e | 888 | |
b72f4eaf | 889 | //____________________________________________________________________ |
890 | UShort_t AliTRDseedV1::GetVolumeId() const | |
891 | { | |
4ecadb52 | 892 | // Returns geometry volume id by delegation |
893 | ||
fbe11be7 | 894 | for(Int_t ic(0);ic<kNclusters; ic++){ |
895 | if(fClusters[ic]) return fClusters[ic]->GetVolumeId(); | |
896 | } | |
897 | return 0; | |
b72f4eaf | 898 | } |
899 | ||
900 | ||
d937ad7a | 901 | //____________________________________________________________________ |
e3cf3d02 | 902 | void AliTRDseedV1::Calibrate() |
d937ad7a | 903 | { |
e3cf3d02 | 904 | // Retrieve calibration and position parameters from OCDB. |
905 | // The following information are used | |
d937ad7a | 906 | // - detector index |
e3cf3d02 | 907 | // - column and row position of first attached cluster. If no clusters are attached |
908 | // to the tracklet a random central chamber position (c=70, r=7) will be used. | |
909 | // | |
910 | // The following information is cached in the tracklet | |
911 | // t0 (trigger delay) | |
912 | // drift velocity | |
913 | // PRF width | |
914 | // omega*tau = tg(a_L) | |
915 | // diffusion coefficients (longitudinal and transversal) | |
d937ad7a | 916 | // |
917 | // Author : | |
918 | // Alex Bercuci <A.Bercuci@gsi.de> | |
919 | // Date : Jan 8th 2009 | |
920 | // | |
eb38ed55 | 921 | |
d937ad7a | 922 | AliCDBManager *cdb = AliCDBManager::Instance(); |
923 | if(cdb->GetRun() < 0){ | |
924 | AliError("OCDB manager not properly initialized"); | |
925 | return; | |
926 | } | |
0906e73e | 927 | |
e3cf3d02 | 928 | AliTRDcalibDB *calib = AliTRDcalibDB::Instance(); |
929 | AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet), | |
930 | *t0ROC = calib->GetT0ROC(fDet);; | |
931 | const AliTRDCalDet *vdDet = calib->GetVdriftDet(); | |
932 | const AliTRDCalDet *t0Det = calib->GetT0Det(); | |
d937ad7a | 933 | |
934 | Int_t col = 70, row = 7; | |
935 | AliTRDcluster **c = &fClusters[0]; | |
3e778975 | 936 | if(GetN()){ |
d937ad7a | 937 | Int_t ic = 0; |
8d2bec9e | 938 | while (ic<kNclusters && !(*c)){ic++; c++;} |
d937ad7a | 939 | if(*c){ |
940 | col = (*c)->GetPadCol(); | |
941 | row = (*c)->GetPadRow(); | |
942 | } | |
943 | } | |
3a039a31 | 944 | |
e17f4785 | 945 | fT0 = (t0Det->GetValue(fDet) + t0ROC->GetValue(col,row)) / AliTRDCommonParam::Instance()->GetSamplingFrequency(); |
e3cf3d02 | 946 | fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row); |
947 | fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF; | |
948 | fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD); | |
949 | AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL, | |
950 | fDiffT, fVD); | |
903326c1 | 951 | AliDebug(4, Form("Calibration params for Det[%3d] Col[%3d] Row[%2d]\n t0[%f] vd[%f] s2PRF[%f] ExB[%f] Dl[%f] Dt[%f]", fDet, col, row, fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT)); |
952 | ||
953 | ||
e3cf3d02 | 954 | SetBit(kCalib, kTRUE); |
0906e73e | 955 | } |
956 | ||
0906e73e | 957 | //____________________________________________________________________ |
29b87567 | 958 | void AliTRDseedV1::SetOwner() |
0906e73e | 959 | { |
29b87567 | 960 | //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO")); |
961 | ||
962 | if(TestBit(kOwner)) return; | |
8d2bec9e | 963 | for(int ic=0; ic<kNclusters; ic++){ |
29b87567 | 964 | if(!fClusters[ic]) continue; |
965 | fClusters[ic] = new AliTRDcluster(*fClusters[ic]); | |
966 | } | |
967 | SetBit(kOwner); | |
0906e73e | 968 | } |
969 | ||
eb2b4f91 | 970 | //____________________________________________________________ |
4ecadb52 | 971 | void AliTRDseedV1::SetPadPlane(AliTRDpadPlane * const p) |
eb2b4f91 | 972 | { |
973 | // Shortcut method to initialize pad geometry. | |
2eb10c34 | 974 | fPad[0] = p->GetLengthIPad(); |
975 | fPad[1] = p->GetWidthIPad(); | |
976 | fPad[2] = TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle()); | |
977 | fPad[3] = p->GetRow0() + p->GetAnodeWireOffset(); | |
eb2b4f91 | 978 | } |
979 | ||
980 | ||
9dcc64cc | 981 | |
e4f2f73d | 982 | //____________________________________________________________________ |
9dcc64cc | 983 | Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt, Bool_t chgPos, Int_t ev) |
e4f2f73d | 984 | { |
1fd9389f | 985 | // |
986 | // Projective algorithm to attach clusters to seeding tracklets. The following steps are performed : | |
987 | // 1. Collapse x coordinate for the full detector plane | |
988 | // 2. truncated mean on y (r-phi) direction | |
989 | // 3. purge clusters | |
990 | // 4. truncated mean on z direction | |
991 | // 5. purge clusters | |
992 | // | |
993 | // Parameters | |
994 | // - chamber : pointer to tracking chamber container used to search the tracklet | |
995 | // - tilt : switch for tilt correction during road building [default true] | |
996 | // Output | |
997 | // - true : if tracklet found successfully. Failure can happend because of the following: | |
998 | // - | |
999 | // Detailed description | |
9dcc64cc | 1000 | // |
1fd9389f | 1001 | // We start up by defining the track direction in the xy plane and roads. The roads are calculated based |
8a7ff53c | 1002 | // on tracking information (variance in the r-phi direction) and estimated variance of the standard |
1003 | // clusters (see AliTRDcluster::SetSigmaY2()) corrected for tilt (see GetCovAt()). From this the road is | |
1004 | // BEGIN_LATEX | |
500851ab | 1005 | // r_{y} = 3*#sqrt{12*(#sigma^{2}_{Trk}(y) + #frac{#sigma^{2}_{cl}(y) + tg^{2}(#alpha_{L})#sigma^{2}_{cl}(z)}{1+tg^{2}(#alpha_{L})})} |
8a7ff53c | 1006 | // r_{z} = 1.5*L_{pad} |
1007 | // END_LATEX | |
1fd9389f | 1008 | // |
4b755889 | 1009 | // Author : Alexandru Bercuci <A.Bercuci@gsi.de> |
9dcc64cc | 1010 | // Debug : level = 2 for calibration |
1011 | // level = 3 for visualization in the track SR | |
1012 | // level = 4 for full visualization including digit level | |
1fd9389f | 1013 | |
fc0882f3 | 1014 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it |
1015 | ||
1016 | if(!recoParam){ | |
560e5c05 | 1017 | AliError("Tracklets can not be used without a valid RecoParam."); |
29b87567 | 1018 | return kFALSE; |
1019 | } | |
9dcc64cc | 1020 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
1021 | if (!calibration) { | |
1022 | AliError("No access to calibration data"); | |
1023 | return kFALSE; | |
1024 | } | |
1025 | // Retrieve the CDB container class with the parametric likelihood | |
1026 | const AliTRDCalTrkAttach *attach = calibration->GetAttachObject(); | |
1027 | if (!attach) { | |
1028 | AliError("No usable AttachClusters calib object."); | |
1029 | return kFALSE; | |
1030 | } | |
1031 | ||
b1957d3c | 1032 | // Initialize reco params for this tracklet |
1033 | // 1. first time bin in the drift region | |
a2abcbc5 | 1034 | Int_t t0 = 14; |
fc0882f3 | 1035 | Int_t kClmin = Int_t(recoParam->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins()); |
9dcc64cc | 1036 | Int_t kTBmin = 4; |
29b87567 | 1037 | |
9dcc64cc | 1038 | Double_t sysCov[5]; recoParam->GetSysCovMatrix(sysCov); |
8a7ff53c | 1039 | Double_t s2yTrk= fRefCov[0], |
1040 | s2yCl = 0., | |
1041 | s2zCl = GetPadLength()*GetPadLength()/12., | |
1042 | syRef = TMath::Sqrt(s2yTrk), | |
1043 | t2 = GetTilt()*GetTilt(); | |
29b87567 | 1044 | //define roads |
9dcc64cc | 1045 | const Double_t kroady = 3.; //recoParam->GetRoad1y(); |
1046 | const Double_t kroadz = GetPadLength() * recoParam->GetRoadzMultiplicator() + 1.; | |
8a7ff53c | 1047 | // define probing cluster (the perfect cluster) and default calibration |
1048 | Short_t sig[] = {0, 0, 10, 30, 10, 0,0}; | |
1049 | AliTRDcluster cp(fDet, 6, 75, 0, sig, 0); | |
560e5c05 | 1050 | if(fkReconstructor->IsHLT()) cp.SetRPhiMethod(AliTRDcluster::kCOG); |
1051 | if(!IsCalibrated()) Calibrate(); | |
8a7ff53c | 1052 | |
9dcc64cc | 1053 | Int_t kroadyShift(0); |
1054 | Float_t bz(AliTrackerBase::GetBz()); | |
1055 | if(TMath::Abs(bz)>2.){ | |
1056 | if(bz<0.) kroadyShift = chgPos ? +1 : -1; | |
1057 | else kroadyShift = chgPos ? -1 : +1; | |
1058 | } | |
1059 | AliDebug(4, Form("\n syTrk[cm]=%4.2f dydxTrk[deg]=%+6.2f rs[%d] Chg[%c] rY[cm]=%4.2f rZ[cm]=%5.2f TC[%c]", syRef, TMath::ATan(fYref[1])*TMath::RadToDeg(), kroadyShift, chgPos?'+':'-', kroady, kroadz, tilt?'y':'n')); | |
1060 | Double_t phiTrk(TMath::ATan(fYref[1])), | |
1061 | thtTrk(TMath::ATan(fZref[1])); | |
29b87567 | 1062 | |
1063 | // working variables | |
b1957d3c | 1064 | const Int_t kNrows = 16; |
4b755889 | 1065 | const Int_t kNcls = 3*kNclusters; // buffer size |
9dcc64cc | 1066 | TObjArray clst[kNrows]; |
3044dfe5 | 1067 | Bool_t blst[kNrows][kNcls]; |
9dcc64cc | 1068 | Double_t cond[4], |
1069 | dx, dy, dz, | |
1070 | yt, zt, | |
1071 | zc[kNrows], | |
1072 | xres[kNrows][kNcls], yres[kNrows][kNcls], zres[kNrows][kNcls], s2y[kNrows][kNcls]; | |
4b755889 | 1073 | Int_t idxs[kNrows][kNcls], ncl[kNrows], ncls = 0; |
b1957d3c | 1074 | memset(ncl, 0, kNrows*sizeof(Int_t)); |
9dcc64cc | 1075 | memset(zc, 0, kNrows*sizeof(Double_t)); |
1076 | memset(idxs, 0, kNrows*kNcls*sizeof(Int_t)); | |
1077 | memset(xres, 0, kNrows*kNcls*sizeof(Double_t)); | |
4b755889 | 1078 | memset(yres, 0, kNrows*kNcls*sizeof(Double_t)); |
9dcc64cc | 1079 | memset(zres, 0, kNrows*kNcls*sizeof(Double_t)); |
1080 | memset(s2y, 0, kNrows*kNcls*sizeof(Double_t)); | |
3044dfe5 | 1081 | memset(blst, 0, kNrows*kNcls*sizeof(Bool_t)); //this is 8 times faster to memset than "memset(clst, 0, kNrows*kNcls*sizeof(AliTRDcluster*))" |
b1957d3c | 1082 | |
9dcc64cc | 1083 | Double_t roady(0.), s2Mean(0.), sMean(0.); Int_t ns2Mean(0); |
1084 | ||
1085 | // Do cluster projection and pick up cluster candidates | |
1086 | AliTRDcluster *c(NULL); | |
1087 | AliTRDchamberTimeBin *layer(NULL); | |
b1957d3c | 1088 | Bool_t kBUFFER = kFALSE; |
4b755889 | 1089 | for (Int_t it = 0; it < kNtb; it++) { |
b1957d3c | 1090 | if(!(layer = chamber->GetTB(it))) continue; |
29b87567 | 1091 | if(!Int_t(*layer)) continue; |
8a7ff53c | 1092 | // get track projection at layers position |
b1957d3c | 1093 | dx = fX0 - layer->GetX(); |
1094 | yt = fYref[0] - fYref[1] * dx; | |
1095 | zt = fZref[0] - fZref[1] * dx; | |
9dcc64cc | 1096 | // get standard cluster error corrected for tilt if selected |
8a7ff53c | 1097 | cp.SetLocalTimeBin(it); |
1098 | cp.SetSigmaY2(0.02, fDiffT, fExB, dx, -1./*zt*/, fYref[1]); | |
9dcc64cc | 1099 | s2yCl = cp.GetSigmaY2() + sysCov[0]; if(!tilt) s2yCl = (s2yCl + t2*s2zCl)/(1.+t2); |
1100 | if(TMath::Abs(it-12)<7){ s2Mean += cp.GetSigmaY2(); ns2Mean++;} | |
1101 | // get estimated road in r-phi direction | |
1102 | roady = TMath::Min(3.*TMath::Sqrt(12.*(s2yTrk + s2yCl)), kroady); | |
1103 | ||
1104 | AliDebug(5, Form("\n" | |
1105 | " %2d xd[cm]=%6.3f yt[cm]=%7.2f zt[cm]=%8.2f\n" | |
1106 | " syTrk[um]=%6.2f syCl[um]=%6.2f syClTlt[um]=%6.2f\n" | |
1107 | " Ry[mm]=%f" | |
1108 | , it, dx, yt, zt | |
1109 | , 1.e4*TMath::Sqrt(s2yTrk), 1.e4*TMath::Sqrt(cp.GetSigmaY2()+sysCov[0]), 1.e4*TMath::Sqrt(s2yCl) | |
1110 | , 1.e1*roady)); | |
1111 | ||
1112 | // get clusters from layer | |
1113 | cond[0] = yt/*+0.5*kroadyShift*kroady*/; cond[2] = roady; | |
b1957d3c | 1114 | cond[1] = zt; cond[3] = kroadz; |
9dcc64cc | 1115 | Int_t n=0, idx[6]; layer->GetClusters(cond, idx, n, 6); |
b1957d3c | 1116 | for(Int_t ic = n; ic--;){ |
1117 | c = (*layer)[idx[ic]]; | |
9dcc64cc | 1118 | dx = fX0 - c->GetX(); |
1119 | yt = fYref[0] - fYref[1] * dx; | |
1120 | zt = fZref[0] - fZref[1] * dx; | |
1121 | dz = zt - c->GetZ(); | |
1122 | dy = yt - (c->GetY() + (tilt ? (GetTilt() * dz) : 0.)); | |
b1957d3c | 1123 | Int_t r = c->GetPadRow(); |
9dcc64cc | 1124 | clst[r].AddAtAndExpand(c, ncl[r]); |
3044dfe5 | 1125 | blst[r][ncl[r]] = kTRUE; |
b1957d3c | 1126 | idxs[r][ncl[r]] = idx[ic]; |
9dcc64cc | 1127 | zres[r][ncl[r]] = dz/GetPadLength(); |
b1957d3c | 1128 | yres[r][ncl[r]] = dy; |
9dcc64cc | 1129 | xres[r][ncl[r]] = dx; |
1130 | zc[r] = c->GetZ(); | |
1131 | // TODO temporary solution to avoid divercences in error parametrization | |
1132 | s2y[r][ncl[r]] = TMath::Min(c->GetSigmaY2()+sysCov[0], 0.025); | |
1133 | AliDebug(5, Form(" -> dy[cm]=%+7.4f yc[cm]=%7.2f row[%d] idx[%2d]", dy, c->GetY(), r, ncl[r])); | |
b1957d3c | 1134 | ncl[r]++; ncls++; |
1135 | ||
4b755889 | 1136 | if(ncl[r] >= kNcls) { |
560e5c05 | 1137 | AliWarning(Form("Cluster candidates row[%d] reached buffer limit[%d]. Some may be lost.", r, kNcls)); |
b1957d3c | 1138 | kBUFFER = kTRUE; |
29b87567 | 1139 | break; |
1140 | } | |
1141 | } | |
b1957d3c | 1142 | if(kBUFFER) break; |
29b87567 | 1143 | } |
ee8fb199 | 1144 | if(ncls<kClmin){ |
560e5c05 | 1145 | AliDebug(1, Form("CLUSTERS FOUND %d LESS THAN THRESHOLD %d.", ncls, kClmin)); |
7c3eecb8 | 1146 | SetErrorMsg(kAttachClFound); |
9dcc64cc | 1147 | for(Int_t ir(kNrows);ir--;) clst[ir].Clear(); |
ee8fb199 | 1148 | return kFALSE; |
1149 | } | |
9dcc64cc | 1150 | if(ns2Mean<kTBmin){ |
1151 | AliDebug(1, Form("CLUSTERS IN TimeBins %d LESS THAN THRESHOLD %d.", ns2Mean, kTBmin)); | |
1152 | SetErrorMsg(kAttachClFound); | |
1153 | for(Int_t ir(kNrows);ir--;) clst[ir].Clear(); | |
1154 | return kFALSE; | |
1155 | } | |
1156 | s2Mean /= ns2Mean; sMean = TMath::Sqrt(s2Mean); | |
1157 | //Double_t sRef(TMath::Sqrt(s2Mean+s2yTrk)); // reference error parameterization | |
1158 | ||
1159 | // organize row candidates | |
1160 | Int_t idxRow[kNrows], nrc(0); Double_t zresRow[kNrows]; | |
1161 | for(Int_t ir(0); ir<kNrows; ir++){ | |
1162 | idxRow[ir]=-1; zresRow[ir] = 999.; | |
1163 | if(!ncl[ir]) continue; | |
1164 | // get mean z resolution | |
1165 | dz = 0.; for(Int_t ic = ncl[ir]; ic--;) dz += zres[ir][ic]; dz/=ncl[ir]; | |
1166 | // insert row | |
1167 | idxRow[nrc] = ir; zresRow[nrc] = TMath::Abs(dz); nrc++; | |
1168 | } | |
1169 | AliDebug(4, Form("Found %d clusters in %d rows. Sorting ...", ncls, nrc)); | |
1170 | ||
1171 | // sort row candidates | |
1172 | if(nrc>=2){ | |
1173 | if(nrc==2){ | |
1174 | if(zresRow[0]>zresRow[1]){ // swap | |
1175 | Int_t itmp=idxRow[1]; idxRow[1] = idxRow[0]; idxRow[0] = itmp; | |
1176 | Double_t dtmp=zresRow[1]; zresRow[1] = zresRow[0]; zresRow[0] = dtmp; | |
1177 | } | |
1178 | if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){ | |
1179 | SetErrorMsg(kAttachRowGap); | |
1180 | AliDebug(2, Form("Rows attached not continuous. Select first candidate.\n" | |
1181 | " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f", | |
0a62661e | 1182 | idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], idxRow[1]<0?0:ncl[idxRow[1]], zresRow[1])); |
9dcc64cc | 1183 | nrc=1; idxRow[1] = -1; zresRow[1] = 999.; |
1184 | } | |
1185 | } else { | |
1186 | Int_t idx0[kNrows]; | |
1187 | TMath::Sort(nrc, zresRow, idx0, kFALSE); | |
1188 | nrc = 3; // select only maximum first 3 candidates | |
1189 | Int_t iatmp[] = {-1, -1, -1}; Double_t datmp[] = {999., 999., 999.}; | |
1190 | for(Int_t irc(0); irc<nrc; irc++){ | |
1191 | iatmp[irc] = idxRow[idx0[irc]]; | |
1192 | datmp[irc] = zresRow[idx0[irc]]; | |
1193 | } | |
1194 | idxRow[0] = iatmp[0]; zresRow[0] = datmp[0]; | |
1195 | idxRow[1] = iatmp[1]; zresRow[1] = datmp[1]; | |
1196 | idxRow[2] = iatmp[2]; zresRow[2] = datmp[2]; // temporary | |
1197 | if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){ | |
1198 | SetErrorMsg(kAttachRowGap); | |
1199 | AliDebug(2, Form("Rows attached not continuous. Turn on selection.\n" | |
1200 | "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n" | |
1201 | "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n" | |
1202 | "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f", | |
1203 | idxRow[0], ncl[idxRow[0]], zresRow[0], | |
1204 | idxRow[1], ncl[idxRow[1]], zresRow[1], | |
1205 | idxRow[2], ncl[idxRow[2]], zresRow[2])); | |
1206 | if(TMath::Abs(idxRow[0] - idxRow[2]) == 1){ // select second candidate | |
1207 | AliDebug(2, "Solved ! Remove second candidate."); | |
1208 | nrc = 2; | |
1209 | idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap | |
1210 | idxRow[2] = -1; zresRow[2] = 999.; // remove | |
1211 | } else if(TMath::Abs(idxRow[1] - idxRow[2]) == 1){ | |
1212 | if(ncl[idxRow[1]]+ncl[idxRow[2]] > ncl[idxRow[0]]){ | |
1213 | AliDebug(2, "Solved ! Remove first candidate."); | |
1214 | nrc = 2; | |
1215 | idxRow[0] = idxRow[1]; zresRow[0] = zresRow[1]; // swap | |
1216 | idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap | |
1217 | } else { | |
1218 | AliDebug(2, "Solved ! Remove second and third candidate."); | |
1219 | nrc = 1; | |
1220 | idxRow[1] = -1; zresRow[1] = 999.; // remove | |
1221 | idxRow[2] = -1; zresRow[2] = 999.; // remove | |
1222 | } | |
1223 | } else { | |
1224 | AliDebug(2, "Unsolved !!! Remove second and third candidate."); | |
1225 | nrc = 1; | |
1226 | idxRow[1] = -1; zresRow[1] = 999.; // remove | |
1227 | idxRow[2] = -1; zresRow[2] = 999.; // remove | |
1228 | } | |
1229 | } else { // remove temporary candidate | |
1230 | nrc = 2; | |
1231 | idxRow[2] = -1; zresRow[2] = 999.; | |
b1957d3c | 1232 | } |
b1957d3c | 1233 | } |
29b87567 | 1234 | } |
9dcc64cc | 1235 | AliDebug(4, Form("Sorted row candidates:\n" |
1236 | " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f" | |
2f4384e6 | 1237 | , idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], ncl[idxRow[1]], zresRow[1])); |
9dcc64cc | 1238 | |
1239 | // initialize debug streamer | |
1240 | TTreeSRedirector *pstreamer(NULL); | |
1241 | if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); | |
1242 | if(pstreamer){ | |
1243 | // save config. for calibration | |
1244 | TVectorD vdy[2], vdx[2], vs2[2]; | |
1245 | for(Int_t jr(0); jr<nrc; jr++){ | |
1246 | Int_t ir(idxRow[jr]); | |
1247 | vdx[jr].ResizeTo(ncl[ir]); vdy[jr].ResizeTo(ncl[ir]); vs2[jr].ResizeTo(ncl[ir]); | |
1248 | for(Int_t ic(ncl[ir]); ic--;){ | |
1249 | vdx[jr](ic) = xres[ir][ic]; | |
1250 | vdy[jr](ic) = yres[ir][ic]; | |
1251 | vs2[jr](ic) = s2y[ir][ic]; | |
1252 | } | |
1253 | } | |
1254 | (*pstreamer) << "AttachClusters4" | |
1255 | << "r0=" << idxRow[0] | |
1256 | << "dz0=" << zresRow[0] | |
1257 | << "dx0=" << &vdx[0] | |
560e5c05 | 1258 | << "dy0=" << &vdy[0] |
9dcc64cc | 1259 | << "s20=" << &vs2[0] |
1260 | << "r1=" << idxRow[1] | |
1261 | << "dz1=" << zresRow[1] | |
1262 | << "dx1=" << &vdx[1] | |
560e5c05 | 1263 | << "dy1=" << &vdy[1] |
9dcc64cc | 1264 | << "s21=" << &vs2[1] |
560e5c05 | 1265 | << "\n"; |
9dcc64cc | 1266 | vdx[0].Clear(); vdy[0].Clear(); vs2[0].Clear(); |
1267 | vdx[1].Clear(); vdy[1].Clear(); vs2[1].Clear(); | |
1268 | if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 4){ | |
2f4384e6 | 1269 | Int_t idx(idxRow[1]); |
1270 | if(idx<0){ | |
9dcc64cc | 1271 | for(Int_t ir(0); ir<kNrows; ir++){ |
1272 | if(clst[ir].GetEntries()>0) continue; | |
1273 | idx = ir; | |
1274 | break; | |
1275 | } | |
2f4384e6 | 1276 | } |
9dcc64cc | 1277 | (*pstreamer) << "AttachClusters5" |
1278 | << "c0.=" << &clst[idxRow[0]] | |
1279 | << "c1.=" << &clst[idx] | |
1280 | << "\n"; | |
1281 | } | |
560e5c05 | 1282 | } |
1283 | ||
9dcc64cc | 1284 | //======================================================================================= |
1285 | // Analyse cluster topology | |
1286 | Double_t f[kNcls], // likelihood factors for segments | |
1287 | r[2][kNcls], // d(dydx) of tracklet candidate with respect to track | |
1288 | xm[2][kNcls], // mean <x> | |
1289 | ym[2][kNcls], // mean <y> | |
1290 | sm[2][kNcls], // mean <s_y> | |
1291 | s[2][kNcls], // sigma_y | |
2f4384e6 | 1292 | p[2][kNcls], // prob of Gauss |
1293 | q[2][kNcls]; // charge/segment | |
9dcc64cc | 1294 | memset(f, 0, kNcls*sizeof(Double_t)); |
1295 | Int_t index[2][kNcls], n[2][kNcls]; | |
1296 | memset(n, 0, 2*kNcls*sizeof(Int_t)); | |
1297 | Int_t mts(0), nts[2] = {0, 0}; // no of tracklet segments in row | |
1298 | AliTRDpadPlane *pp(AliTRDtransform::Geometry().GetPadPlane(fDet)); | |
1299 | AliTRDtrackletOflHelper helper; | |
1300 | Int_t lyDet(AliTRDgeometry::GetLayer(fDet)); | |
1301 | for(Int_t jr(0), n0(0); jr<nrc; jr++){ | |
1302 | Int_t ir(idxRow[jr]); | |
1303 | // cluster segmentation | |
1304 | Bool_t kInit(kFALSE); | |
1305 | if(jr==0){ | |
1306 | n0 = helper.Init(pp, &clst[ir]); kInit = kTRUE; | |
1307 | if(!n0 || (helper.ClassifyTopology() == AliTRDtrackletOflHelper::kNormal)){ | |
1308 | nts[jr] = 1; memset(index[jr], 0, ncl[ir]*sizeof(Int_t)); | |
1309 | n[jr][0] = ncl[ir]; | |
560e5c05 | 1310 | } |
9dcc64cc | 1311 | } |
1312 | if(!n[jr][0]){ | |
1313 | nts[jr] = AliTRDtrackletOflHelper::Segmentation(ncl[ir], xres[ir], yres[ir], index[jr]); | |
1314 | for(Int_t ic(ncl[ir]);ic--;) n[jr][index[jr][ic]]++; | |
1315 | } | |
1316 | mts += nts[jr]; | |
1317 | ||
1318 | // tracklet segment processing | |
1319 | for(Int_t its(0); its<nts[jr]; its++){ | |
1320 | if(n[jr][its]<=2) { // don't touch small segments | |
1321 | xm[jr][its] = 0.;ym[jr][its] = 0.;sm[jr][its] = 0.; | |
1322 | for(Int_t ic(ncl[ir]); ic--;){ | |
1323 | if(its != index[jr][ic]) continue; | |
1324 | ym[jr][its] += yres[ir][ic]; | |
1325 | xm[jr][its] += xres[ir][ic]; | |
1326 | sm[jr][its] += TMath::Sqrt(s2y[ir][ic]); | |
1327 | } | |
1328 | if(n[jr][its]==2){ xm[jr][its] *= 0.5; ym[jr][its] *= 0.5; sm[jr][its] *= 0.5;} | |
1329 | xm[jr][its]= fX0 - xm[jr][its]; | |
1330 | r[jr][its] = 0.; | |
1331 | s[jr][its] = 1.e-5; | |
1332 | p[jr][its] = 1.; | |
2f4384e6 | 1333 | q[jr][its] = -1.; |
9dcc64cc | 1334 | continue; |
560e5c05 | 1335 | } |
9dcc64cc | 1336 | |
1337 | // for longer tracklet segments | |
1338 | if(!kInit) n0 = helper.Init(pp, &clst[ir], index[jr], its); | |
2f4384e6 | 1339 | Int_t n1 = helper.GetRMS(r[jr][its], ym[jr][its], s[jr][its], fX0/*xm[jr][its]*/); |
1340 | p[jr][its] = Double_t(n1)/n0; | |
9dcc64cc | 1341 | sm[jr][its] = helper.GetSyMean(); |
2f4384e6 | 1342 | q[jr][its] = helper.GetQ()/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]); |
1343 | xm[jr][its] = fX0; | |
9dcc64cc | 1344 | Double_t dxm= fX0 - xm[jr][its]; |
2f4384e6 | 1345 | yt = fYref[0] - fYref[1]*dxm; |
9dcc64cc | 1346 | zt = fZref[0] - fZref[1]*dxm; |
1347 | // correct tracklet fit for tilt | |
1348 | ym[jr][its]+= GetTilt()*(zt - zc[ir]); | |
1349 | r[jr][its] += GetTilt() * fZref[1]; | |
1350 | // correct tracklet fit for track position/inclination | |
2f4384e6 | 1351 | ym[jr][its] = yt - ym[jr][its]; |
1352 | r[jr][its] = (r[jr][its] - fYref[1])/(1+r[jr][its]*fYref[1]); | |
9dcc64cc | 1353 | // report inclination in radians |
1354 | r[jr][its] = TMath::ATan(r[jr][its]); | |
1355 | if(jr) continue; // calculate only for first row likelihoods | |
1356 | ||
1357 | f[its] = attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n[jr][its], ym[jr][its]/*sRef*/, r[jr][its]*TMath::RadToDeg(), s[jr][its]/sm[jr][its]); | |
29b87567 | 1358 | } |
1359 | } | |
9dcc64cc | 1360 | AliDebug(4, Form(" Tracklet candidates: row[%2d] = %2d row[%2d] = %2d:", idxRow[0], nts[0], idxRow[1], nts[1])); |
1361 | if(AliLog::GetDebugLevel("TRD", "AliTRDseedV1")>3){ | |
1362 | for(Int_t jr(0); jr<nrc; jr++){ | |
1363 | Int_t ir(idxRow[jr]); | |
1364 | for(Int_t its(0); its<nts[jr]; its++){ | |
1365 | printf(" segId[%2d] row[%2d] Ncl[%2d] x[cm]=%7.2f dz[pu]=%4.2f dy[mm]=%+7.3f r[deg]=%+6.2f p[%%]=%6.2f s[um]=%7.2f\n", | |
1366 | its, ir, n[jr][its], xm[jr][its], zresRow[jr], 1.e1*ym[jr][its], r[jr][its]*TMath::RadToDeg(), 100.*p[jr][its], 1.e4*s[jr][its]); | |
1367 | } | |
560e5c05 | 1368 | } |
ee8fb199 | 1369 | } |
9dcc64cc | 1370 | if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 2 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
1371 | if(pstreamer){ | |
1372 | // save config. for calibration | |
1373 | TVectorD vidx, vn, vx, vy, vr, vs, vsm, vp, vf; | |
1374 | vidx.ResizeTo(ncl[idxRow[0]]+(idxRow[1]<0?0:ncl[idxRow[1]])); | |
1375 | vn.ResizeTo(mts); | |
1376 | vx.ResizeTo(mts); | |
1377 | vy.ResizeTo(mts); | |
1378 | vr.ResizeTo(mts); | |
1379 | vs.ResizeTo(mts); | |
1380 | vsm.ResizeTo(mts); | |
1381 | vp.ResizeTo(mts); | |
1382 | vf.ResizeTo(mts); | |
1383 | for(Int_t jr(0), jts(0), jc(0); jr<nrc; jr++){ | |
1384 | Int_t ir(idxRow[jr]); | |
1385 | for(Int_t its(0); its<nts[jr]; its++, jts++){ | |
1386 | vn[jts] = n[jr][its]; | |
1387 | vx[jts] = xm[jr][its]; | |
1388 | vy[jts] = ym[jr][its]; | |
1389 | vr[jts] = r[jr][its]; | |
1390 | vs[jts] = s[jr][its]; | |
1391 | vsm[jts]= sm[jr][its]; | |
1392 | vp[jts] = p[jr][its]; | |
1393 | vf[jts] = jr?-1.:f[its]; | |
6ad5e6b2 | 1394 | } |
9dcc64cc | 1395 | for(Int_t ic(0); ic<ncl[ir]; ic++, jc++) vidx[jc] = index[jr][ic]; |
1396 | } | |
1397 | (*pstreamer) << "AttachClusters3" | |
1398 | << "idx=" << &vidx | |
1399 | << "n=" << &vn | |
1400 | << "x=" << &vx | |
1401 | << "y=" << &vy | |
1402 | << "r=" << &vr | |
1403 | << "s=" << &vs | |
1404 | << "sm=" << &vsm | |
1405 | << "p=" << &vp | |
1406 | << "f=" << &vf | |
1407 | << "\n"; | |
1408 | } | |
6ad5e6b2 | 1409 | |
9dcc64cc | 1410 | //========================================================= |
1411 | // Get seed tracklet segment | |
1412 | Int_t idx2[kNcls]; memset(idx2, 0, kNcls*sizeof(Int_t)); // seeding indexing | |
1413 | if(nts[0]>1) TMath::Sort(nts[0], f, idx2); | |
1414 | Int_t is(idx2[0]); // seed index | |
1415 | Int_t idxTrklt[kNcls], | |
1416 | kts(0), | |
1417 | nTrklt(n[0][is]); | |
1418 | Double_t fTrklt(f[is]), | |
1419 | rTrklt(r[0][is]), | |
1420 | yTrklt(ym[0][is]), | |
1421 | sTrklt(s[0][is]), | |
1422 | smTrklt(sm[0][is]), | |
1423 | xTrklt(xm[0][is]), | |
2f4384e6 | 1424 | pTrklt(p[0][is]), |
1425 | qTrklt(q[0][is]); | |
9dcc64cc | 1426 | memset(idxTrklt, 0, kNcls*sizeof(Int_t)); |
1427 | // check seed idx2[0] exit if not found | |
1428 | if(f[is]<1.e-2){ | |
1429 | AliDebug(1, Form("Seed seg[%d] row[%2d] n[%2d] f[%f]<0.01.", is, idxRow[0], n[0][is], f[is])); | |
1430 | SetErrorMsg(kAttachClAttach); | |
1431 | if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); | |
1432 | if(pstreamer){ | |
1433 | UChar_t stat(0); | |
1434 | if(IsKink()) SETBIT(stat, 1); | |
1435 | if(IsStandAlone()) SETBIT(stat, 2); | |
1436 | if(IsRowCross()) SETBIT(stat, 3); | |
1437 | SETBIT(stat, 4); // set error bit | |
1438 | TVectorD vidx; vidx.ResizeTo(1); vidx[0] = is; | |
1439 | (*pstreamer) << "AttachClusters2" | |
1440 | << "stat=" << stat | |
1441 | << "ev=" << ev | |
1442 | << "chg=" << chgPos | |
1443 | << "det=" << fDet | |
1444 | << "x0=" << fX0 | |
1445 | << "y0=" << fYref[0] | |
1446 | << "z0=" << fZref[0] | |
1447 | << "phi=" << phiTrk | |
1448 | << "tht=" << thtTrk | |
1449 | << "pt=" << fPt | |
1450 | << "s2Trk=" << s2yTrk | |
1451 | << "s2Cl=" << s2Mean | |
1452 | << "idx=" << &vidx | |
1453 | << "n=" << nTrklt | |
1454 | << "f=" << fTrklt | |
1455 | << "x=" << xTrklt | |
1456 | << "y=" << yTrklt | |
1457 | << "r=" << rTrklt | |
1458 | << "s=" << sTrklt | |
1459 | << "sm=" << smTrklt | |
1460 | << "p=" << pTrklt | |
2f4384e6 | 1461 | << "q=" << qTrklt |
9dcc64cc | 1462 | << "\n"; |
1463 | } | |
1464 | return kFALSE; | |
1465 | } | |
2f4384e6 | 1466 | AliDebug(2, Form("Seed seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%5.3f] q[%6.2f]", is, idxRow[0], n[0][is], ym[0][is], r[0][is]*TMath::RadToDeg(), s[0][is]/sm[0][is], f[is], q[0][is])); |
9dcc64cc | 1467 | |
1468 | // save seeding segment in the helper | |
1469 | idxTrklt[kts++] = is; | |
1470 | helper.Init(pp, &clst[idxRow[0]], index[0], is); | |
1471 | AliTRDtrackletOflHelper test; // helper to test segment expantion | |
1472 | Float_t rcLikelihood(0.); SetBit(kRowCross, kFALSE); | |
1473 | Double_t dyRez[kNcls]; Int_t idx3[kNcls]; | |
1474 | ||
1475 | //========================================================= | |
1476 | // Define filter parameters from OCDB | |
1477 | Int_t kNSgmDy[2]; attach->GetNsgmDy(kNSgmDy[0], kNSgmDy[1]); | |
1478 | Float_t kLikeMinRelDecrease[2]; attach->GetLikeMinRelDecrease(kLikeMinRelDecrease[0], kLikeMinRelDecrease[1]); | |
1479 | Float_t kRClikeLimit(attach->GetRClikeLimit()); | |
1480 | ||
1481 | //========================================================= | |
1482 | // Try attaching next segments from first row (if any) | |
1483 | if(nts[0]>1){ | |
1484 | Int_t jr(0), ir(idxRow[jr]); | |
1485 | // organize secondary sgms. in decreasing order of their distance from seed | |
1486 | memset(dyRez, 0, nts[jr]*sizeof(Double_t)); | |
1487 | for(Int_t jts(1); jts<nts[jr]; jts++) { | |
1488 | Int_t its(idx2[jts]); | |
1489 | Double_t rot(TMath::Tan(r[0][is])); | |
1490 | dyRez[its] = TMath::Abs(ym[0][is] - ym[jr][its] + rot*(xm[0][is]-xm[jr][its])); | |
1491 | } | |
1492 | TMath::Sort(nts[jr], dyRez, idx3, kFALSE); | |
1493 | for (Int_t jts(1); jts<nts[jr]; jts++) { | |
1494 | Int_t its(idx3[jts]); | |
1495 | if(dyRez[its] > kNSgmDy[jr]*smTrklt){ | |
1496 | AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt)); | |
1497 | continue; | |
1498 | } | |
1499 | ||
1500 | test = helper; | |
1501 | Int_t n0 = test.Expand(&clst[ir], index[jr], its); | |
2f4384e6 | 1502 | Double_t rt, dyt, st, xt, smt, pt, qt, ft; |
1503 | Int_t n1 = test.GetRMS(rt, dyt, st, fX0/*xt*/); | |
9dcc64cc | 1504 | pt = Double_t(n1)/n0; |
1505 | smt = test.GetSyMean(); | |
2f4384e6 | 1506 | qt = test.GetQ()/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]); |
1507 | xt = fX0; | |
9dcc64cc | 1508 | // correct position |
1509 | Double_t dxm= fX0 - xt; | |
1510 | yt = fYref[0] - fYref[1]*dxm; | |
1511 | zt = fZref[0] - fZref[1]*dxm; | |
1512 | // correct tracklet fit for tilt | |
1513 | dyt+= GetTilt()*(zt - zc[idxRow[0]]); | |
1514 | rt += GetTilt() * fZref[1]; | |
1515 | // correct tracklet fit for track position/inclination | |
2f4384e6 | 1516 | dyt = yt - dyt; |
1517 | rt = (rt - fYref[1])/(1+rt*fYref[1]); | |
9dcc64cc | 1518 | // report inclination in radians |
1519 | rt = TMath::ATan(rt); | |
1520 | ||
1521 | ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.; | |
1522 | Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr])); | |
1523 | ||
1524 | AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].", | |
1525 | (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr]))); | |
1526 | if(kAccept){ | |
1527 | idxTrklt[kts++] = its; | |
1528 | nTrklt = n0; | |
1529 | fTrklt = ft; | |
1530 | rTrklt = rt; | |
1531 | yTrklt = dyt; | |
1532 | sTrklt = st; | |
1533 | smTrklt= smt; | |
1534 | xTrklt = xt; | |
1535 | pTrklt = pt; | |
2f4384e6 | 1536 | qTrklt = qt; |
9dcc64cc | 1537 | helper.Expand(&clst[ir], index[jr], its); |
1538 | } | |
b1957d3c | 1539 | } |
560e5c05 | 1540 | } |
9dcc64cc | 1541 | |
1542 | //========================================================= | |
1543 | // Try attaching next segments from second row (if any) | |
1544 | if(nts[1] && (rcLikelihood = zresRow[0]/zresRow[1]) > kRClikeLimit){ | |
1545 | // organize secondaries in decreasing order of their distance from seed | |
1546 | Int_t jr(1), ir(idxRow[jr]); | |
1547 | memset(dyRez, 0, nts[jr]*sizeof(Double_t)); | |
1548 | Double_t rot(TMath::Tan(r[0][is])); | |
1549 | for(Int_t jts(0); jts<nts[jr]; jts++) { | |
1550 | dyRez[jts] = TMath::Abs(ym[0][is] - ym[jr][jts] + rot*(xm[0][is]-xm[jr][jts])); | |
1551 | } | |
1552 | TMath::Sort(nts[jr], dyRez, idx3, kFALSE); | |
1553 | for (Int_t jts(0); jts<nts[jr]; jts++) { | |
1554 | Int_t its(idx3[jts]); | |
1555 | if(dyRez[its] > kNSgmDy[jr]*smTrklt){ | |
1556 | AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt)); | |
1557 | continue; | |
1558 | } | |
1559 | ||
1560 | test = helper; | |
1561 | Int_t n0 = test.Expand(&clst[ir], index[jr], its); | |
2f4384e6 | 1562 | Double_t rt, dyt, st, xt, smt, pt, qt, ft; |
1563 | Int_t n1 = test.GetRMS(rt, dyt, st, fX0/*xt*/); | |
9dcc64cc | 1564 | pt = Double_t(n1)/n0; |
1565 | smt = test.GetSyMean(); | |
2f4384e6 | 1566 | qt = test.GetQ()/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]); |
1567 | xt = fX0; | |
9dcc64cc | 1568 | // correct position |
1569 | Double_t dxm= fX0 - xt; | |
1570 | yt = fYref[0] - fYref[1]*dxm; | |
1571 | zt = fZref[0] - fZref[1]*dxm; | |
1572 | // correct tracklet fit for tilt | |
1573 | dyt+= GetTilt()*(zt - zc[idxRow[0]]); | |
1574 | rt += GetTilt() * fZref[1]; | |
1575 | // correct tracklet fit for track position/inclination | |
2f4384e6 | 1576 | dyt = yt - dyt; |
1577 | rt = (rt - fYref[1])/(1+rt*fYref[1]); | |
9dcc64cc | 1578 | // report inclination in radians |
1579 | rt = TMath::ATan(rt); | |
1580 | ||
1581 | ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.; | |
1582 | Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr])); | |
1583 | ||
1584 | AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].", | |
1585 | (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr]))); | |
1586 | if(kAccept){ | |
1587 | idxTrklt[kts++] = its; | |
1588 | nTrklt = n0; | |
1589 | fTrklt = ft; | |
1590 | rTrklt = rt; | |
1591 | yTrklt = dyt; | |
1592 | sTrklt = st; | |
1593 | smTrklt= smt; | |
1594 | xTrklt = xt; | |
1595 | pTrklt = pt; | |
2f4384e6 | 1596 | qTrklt = qt; |
9dcc64cc | 1597 | helper.Expand(&clst[ir], index[jr], its); |
1598 | SetBit(kRowCross, kTRUE); // mark pad row crossing | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | // clear local copy of clusters | |
1603 | for(Int_t ir(0); ir<kNrows; ir++) clst[ir].Clear(); | |
1604 | ||
1605 | if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); | |
1606 | if(pstreamer){ | |
1607 | UChar_t stat(0); | |
1608 | if(IsKink()) SETBIT(stat, 1); | |
1609 | if(IsStandAlone()) SETBIT(stat, 2); | |
1610 | if(IsRowCross()) SETBIT(stat, 3); | |
1611 | TVectorD vidx; vidx.ResizeTo(kts); | |
1612 | for(Int_t its(0); its<kts; its++) vidx[its] = idxTrklt[its]; | |
1613 | (*pstreamer) << "AttachClusters2" | |
1614 | << "stat=" << stat | |
1615 | << "ev=" << ev | |
1616 | << "chg=" << chgPos | |
1617 | << "det=" << fDet | |
1618 | << "x0=" << fX0 | |
1619 | << "y0=" << fYref[0] | |
1620 | << "z0=" << fZref[0] | |
1621 | << "phi=" << phiTrk | |
1622 | << "tht=" << thtTrk | |
1623 | << "pt=" << fPt | |
1624 | << "s2Trk=" << s2yTrk | |
1625 | << "s2Cl=" << s2Mean | |
1626 | << "idx=" << &vidx | |
1627 | << "n=" << nTrklt | |
2f4384e6 | 1628 | << "q=" << qTrklt |
9dcc64cc | 1629 | << "f=" << fTrklt |
1630 | << "x=" << xTrklt | |
1631 | << "y=" << yTrklt | |
1632 | << "r=" << rTrklt | |
1633 | << "s=" << sTrklt | |
1634 | << "sm=" << smTrklt | |
1635 | << "p=" << pTrklt | |
1636 | << "\n"; | |
1637 | } | |
1638 | ||
1639 | ||
1640 | //========================================================= | |
1641 | // Store clusters | |
1642 | Int_t nselected(0), nc(0); | |
1643 | TObjArray *selected(helper.GetClusters()); | |
1644 | if(!selected || !(nselected = selected->GetEntriesFast())){ | |
1645 | AliError("Cluster candidates missing !!!"); | |
1646 | SetErrorMsg(kAttachClAttach); | |
1647 | return kFALSE; | |
1648 | } | |
1649 | for(Int_t ic(0); ic<nselected; ic++){ | |
1650 | if(!(c = (AliTRDcluster*)selected->At(ic))) continue; | |
1651 | Int_t it(c->GetPadTime()), | |
1652 | jr(Int_t(helper.GetRow() != c->GetPadRow())), | |
1653 | idx(it+kNtb*jr); | |
1654 | if(fClusters[idx]){ | |
1655 | AliDebug(1, Form("Multiple clusters/tb for D[%03d] Tb[%02d] Row[%2d]", fDet, it, c->GetPadRow())); | |
1656 | continue; // already booked | |
1657 | } | |
1658 | // TODO proper indexing of clusters !! | |
1659 | fIndexes[idx] = chamber->GetTB(it)->GetGlobalIndex(idxs[idxRow[jr]][ic]); | |
1660 | fClusters[idx] = c; | |
1661 | nc++; | |
1662 | } | |
1663 | AliDebug(2, Form("Clusters Found[%2d] Attached[%2d] RC[%c]", nselected, nc, IsRowCross()?'y':'n')); | |
b1957d3c | 1664 | |
29b87567 | 1665 | // number of minimum numbers of clusters expected for the tracklet |
9dcc64cc | 1666 | if (nc < kClmin){ |
1667 | AliDebug(1, Form("NOT ENOUGH CLUSTERS %d ATTACHED TO THE TRACKLET [min %d] FROM FOUND %d.", nc, kClmin, ncls)); | |
7c3eecb8 | 1668 | SetErrorMsg(kAttachClAttach); |
e4f2f73d | 1669 | return kFALSE; |
1670 | } | |
9dcc64cc | 1671 | SetN(nc); |
0906e73e | 1672 | |
e3cf3d02 | 1673 | // Load calibration parameters for this tracklet |
9dcc64cc | 1674 | //Calibrate(); |
b1957d3c | 1675 | |
1676 | // calculate dx for time bins in the drift region (calibration aware) | |
a2abcbc5 | 1677 | Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0}; |
1678 | for (Int_t it = t0, irp=0; irp<2 && it < AliTRDtrackerV1::GetNTimeBins(); it++) { | |
b1957d3c | 1679 | if(!fClusters[it]) continue; |
1680 | x[irp] = fClusters[it]->GetX(); | |
a2abcbc5 | 1681 | tb[irp] = fClusters[it]->GetLocalTimeBin(); |
b1957d3c | 1682 | irp++; |
e3cf3d02 | 1683 | } |
d86ed84c | 1684 | Int_t dtb = tb[1] - tb[0]; |
1685 | fdX = dtb ? (x[0] - x[1]) / dtb : 0.15; | |
29b87567 | 1686 | return kTRUE; |
e4f2f73d | 1687 | } |
1688 | ||
03cef9b2 | 1689 | //____________________________________________________________ |
1690 | void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec) | |
1691 | { | |
1692 | // Fill in all derived information. It has to be called after recovery from file or HLT. | |
1693 | // The primitive data are | |
1694 | // - list of clusters | |
1695 | // - detector (as the detector will be removed from clusters) | |
1696 | // - position of anode wire (fX0) - temporary | |
1697 | // - track reference position and direction | |
1698 | // - momentum of the track | |
1699 | // - time bin length [cm] | |
1700 | // | |
1701 | // A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008 | |
1702 | // | |
4d6aee34 | 1703 | fkReconstructor = rec; |
03cef9b2 | 1704 | AliTRDgeometry g; |
2eb10c34 | 1705 | SetPadPlane(g.GetPadPlane(fDet)); |
1706 | ||
e3cf3d02 | 1707 | //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]); |
1708 | //fTgl = fZref[1]; | |
3e778975 | 1709 | Int_t n = 0, nshare = 0, nused = 0; |
03cef9b2 | 1710 | AliTRDcluster **cit = &fClusters[0]; |
8d2bec9e | 1711 | for(Int_t ic = kNclusters; ic--; cit++){ |
03cef9b2 | 1712 | if(!(*cit)) return; |
3e778975 | 1713 | n++; |
1714 | if((*cit)->IsShared()) nshare++; | |
1715 | if((*cit)->IsUsed()) nused++; | |
03cef9b2 | 1716 | } |
3e778975 | 1717 | SetN(n); SetNUsed(nused); SetNShared(nshare); |
e3cf3d02 | 1718 | Fit(); |
03cef9b2 | 1719 | CookLabels(); |
1720 | GetProbability(); | |
1721 | } | |
1722 | ||
1723 | ||
e4f2f73d | 1724 | //____________________________________________________________________ |
2eb10c34 | 1725 | Bool_t AliTRDseedV1::Fit(UChar_t opt) |
e4f2f73d | 1726 | { |
16cca13f | 1727 | // |
1728 | // Linear fit of the clusters attached to the tracklet | |
1729 | // | |
1730 | // Parameters : | |
2eb10c34 | 1731 | // - opt : switch for tilt pad correction of cluster y position. Options are |
1732 | // 0 no correction [default] | |
1733 | // 1 full tilt correction [dz/dx and z0] | |
1734 | // 2 pseudo tilt correction [dz/dx from pad-chamber geometry] | |
1735 | // | |
16cca13f | 1736 | // Output : |
1737 | // True if successful | |
1738 | // | |
1739 | // Detailed description | |
1740 | // | |
1741 | // Fit in the xy plane | |
1742 | // | |
1fd9389f | 1743 | // The fit is performed to estimate the y position of the tracklet and the track |
1744 | // angle in the bending plane. The clusters are represented in the chamber coordinate | |
1745 | // system (with respect to the anode wire - see AliTRDtrackerV1::FollowBackProlongation() | |
1746 | // on how this is set). The x and y position of the cluster and also their variances | |
1747 | // are known from clusterizer level (see AliTRDcluster::GetXloc(), AliTRDcluster::GetYloc(), | |
1748 | // AliTRDcluster::GetSX() and AliTRDcluster::GetSY()). | |
1749 | // If gaussian approximation is used to calculate y coordinate of the cluster the position | |
1750 | // is recalculated taking into account the track angle. The general formula to calculate the | |
1751 | // error of cluster position in the gaussian approximation taking into account diffusion and track | |
1752 | // inclination is given for TRD by: | |
1753 | // BEGIN_LATEX | |
1754 | // #sigma^{2}_{y} = #sigma^{2}_{PRF} + #frac{x#delta_{t}^{2}}{(1+tg(#alpha_{L}))^{2}} + #frac{x^{2}tg^{2}(#phi-#alpha_{L})tg^{2}(#alpha_{L})}{12} | |
1755 | // END_LATEX | |
1756 | // | |
1757 | // Since errors are calculated only in the y directions, radial errors (x direction) are mapped to y | |
1758 | // by projection i.e. | |
1759 | // BEGIN_LATEX | |
1760 | // #sigma_{x|y} = tg(#phi) #sigma_{x} | |
1761 | // END_LATEX | |
1762 | // and also by the lorentz angle correction | |
1763 | // | |
1764 | // Fit in the xz plane | |
1765 | // | |
1766 | // The "fit" is performed to estimate the radial position (x direction) where pad row cross happens. | |
1767 | // If no pad row crossing the z position is taken from geometry and radial position is taken from the xy | |
1768 | // fit (see below). | |
1769 | // | |
1770 | // There are two methods to estimate the radial position of the pad row cross: | |
1771 | // 1. leading cluster radial position : Here the lower part of the tracklet is considered and the last | |
1772 | // cluster registered (at radial x0) on this segment is chosen to mark the pad row crossing. The error | |
1773 | // of the z estimate is given by : | |
1774 | // BEGIN_LATEX | |
1775 | // #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12 | |
1776 | // END_LATEX | |
1777 | // The systematic errors for this estimation are generated by the following sources: | |
1778 | // - no charge sharing between pad rows is considered (sharp cross) | |
1779 | // - missing cluster at row cross (noise peak-up, under-threshold signal etc.). | |
1780 | // | |
1781 | // 2. charge fit over the crossing point : Here the full energy deposit along the tracklet is considered | |
1782 | // to estimate the position of the crossing by a fit in the qx plane. The errors in the q directions are | |
1783 | // parameterized as s_q = q^2. The systematic errors for this estimation are generated by the following sources: | |
1784 | // - no general model for the qx dependence | |
1785 | // - physical fluctuations of the charge deposit | |
1786 | // - gain calibration dependence | |
1787 | // | |
1788 | // Estimation of the radial position of the tracklet | |
16cca13f | 1789 | // |
1fd9389f | 1790 | // For pad row cross the radial position is taken from the xz fit (see above). Otherwise it is taken as the |
1791 | // interpolation point of the tracklet i.e. the point where the error in y of the fit is minimum. The error | |
1792 | // in the y direction of the tracklet is (see AliTRDseedV1::GetCovAt()): | |
1793 | // BEGIN_LATEX | |
1794 | // #sigma_{y} = #sigma^{2}_{y_{0}} + 2xcov(y_{0}, dy/dx) + #sigma^{2}_{dy/dx} | |
1795 | // END_LATEX | |
1796 | // and thus the radial position is: | |
1797 | // BEGIN_LATEX | |
1798 | // x = - cov(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} | |
1799 | // END_LATEX | |
1800 | // | |
1801 | // Estimation of tracklet position error | |
1802 | // | |
1803 | // The error in y direction is the error of the linear fit at the radial position of the tracklet while in the z | |
1804 | // direction is given by the cluster error or pad row cross error. In case of no pad row cross this is given by: | |
1805 | // BEGIN_LATEX | |
1806 | // #sigma_{y} = #sigma^{2}_{y_{0}} - 2cov^{2}(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} + #sigma^{2}_{dy/dx} | |
1807 | // #sigma_{z} = Pad_{length}/12 | |
1808 | // END_LATEX | |
1809 | // For pad row cross the full error is calculated at the radial position of the crossing (see above) and the error | |
1810 | // in z by the width of the crossing region - being a matter of parameterization. | |
1811 | // BEGIN_LATEX | |
1812 | // #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12 | |
1813 | // END_LATEX | |
1814 | // In case of no tilt correction (default in the barrel tracking) the tilt is taken into account by the rotation of | |
1815 | // the covariance matrix. See AliTRDseedV1::GetCovAt() for details. | |
1816 | // | |
1817 | // Author | |
1818 | // A.Bercuci <A.Bercuci@gsi.de> | |
e4f2f73d | 1819 | |
a723055f | 1820 | if(!fkReconstructor){ |
1821 | AliError("The tracklet needs the reconstruction setup. Please initialize by SetReconstructor()."); | |
1822 | return kFALSE; | |
1823 | } | |
b72f4eaf | 1824 | if(!IsCalibrated()) Calibrate(); |
2eb10c34 | 1825 | if(opt>2){ |
7e5954f0 | 1826 | AliWarning(Form("Option [%d] outside range [0, 2]. Using default",opt)); |
2eb10c34 | 1827 | opt=0; |
1828 | } | |
e3cf3d02 | 1829 | |
29b87567 | 1830 | const Int_t kClmin = 8; |
2eb10c34 | 1831 | const Float_t kScalePulls = 10.; // factor to scale y pulls - NOT UNDERSTOOD |
2f7d6ac8 | 1832 | // get track direction |
1833 | Double_t y0 = fYref[0]; | |
1834 | Double_t dydx = fYref[1]; | |
1835 | Double_t z0 = fZref[0]; | |
1836 | Double_t dzdx = fZref[1]; | |
ae4e8b84 | 1837 | |
5f1ae1e7 | 1838 | AliTRDtrackerV1::AliTRDLeastSquare fitterY; |
1839 | AliTRDtrackerV1::AliTRDLeastSquare fitterZ; | |
f301a656 | 1840 | |
29b87567 | 1841 | // book cluster information |
8d2bec9e | 1842 | Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters]; |
e3cf3d02 | 1843 | |
2eb10c34 | 1844 | Bool_t tilt(opt==1) // full tilt correction |
1845 | ,pseudo(opt==2) // pseudo tilt correction | |
1846 | ,rc(IsRowCross()) // row cross candidate | |
1847 | ,kDZDX(IsPrimary());// switch dzdx calculation for barrel primary tracks | |
1848 | Int_t n(0); // clusters used in fit | |
1849 | AliTRDcluster *c(NULL), *cc(NULL), **jc = &fClusters[0]; | |
fc0882f3 | 1850 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it |
2eb10c34 | 1851 | |
1852 | const Char_t *tcName[]={"NONE", "FULL", "HALF"}; | |
1853 | AliDebug(2, Form("Options : TC[%s] dzdx[%c]", tcName[opt], kDZDX?'Y':'N')); | |
1854 | ||
9dcc64cc | 1855 | |
2eb10c34 | 1856 | for (Int_t ic=0; ic<kNclusters; ic++, ++jc) { |
1857 | xc[ic] = -1.; yc[ic] = 999.; zc[ic] = 999.; sy[ic] = 0.; | |
9eb2d46c | 1858 | if(!(c = (*jc))) continue; |
29b87567 | 1859 | if(!c->IsInChamber()) continue; |
2eb10c34 | 1860 | // compute pseudo tilt correction |
1861 | if(kDZDX){ | |
1862 | fZfit[0] = c->GetZ(); | |
1863 | if(rc){ | |
1864 | for(Int_t kc=AliTRDseedV1::kNtb; kc<AliTRDseedV1::kNclusters; kc++){ | |
1865 | if(!(cc=fClusters[kc])) continue; | |
1866 | if(!cc->IsInChamber()) continue; | |
1867 | fZfit[0] += cc->GetZ(); fZfit[0] *= 0.5; | |
1868 | break; | |
1869 | } | |
1870 | } | |
1871 | fZfit[1] = fZfit[0]/fX0; | |
1872 | if(rc){ | |
1873 | fZfit[0] += fZfit[1]*0.5*AliTRDgeometry::CdrHght(); | |
1874 | fZfit[1] = fZfit[0]/fX0; | |
1875 | } | |
1876 | kDZDX=kFALSE; | |
1877 | } | |
9462866a | 1878 | |
29b87567 | 1879 | Float_t w = 1.; |
1880 | if(c->GetNPads()>4) w = .5; | |
1881 | if(c->GetNPads()>5) w = .2; | |
010d62b0 | 1882 | |
1fd9389f | 1883 | // cluster charge |
dd8059a8 | 1884 | qc[n] = TMath::Abs(c->GetQ()); |
1fd9389f | 1885 | // pad row of leading |
1886 | ||
b72f4eaf | 1887 | xc[n] = fX0 - c->GetX(); |
1888 | ||
1fd9389f | 1889 | // Recalculate cluster error based on tracking information |
2eb10c34 | 1890 | c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], -1./*zcorr?zt:-1.*/, dydx); |
c79857d5 | 1891 | c->SetSigmaZ2(fPad[0]*fPad[0]/12.); // for HLT |
1fd9389f | 1892 | sy[n] = TMath::Sqrt(c->GetSigmaY2()); |
1893 | ||
fc0882f3 | 1894 | yc[n] = recoParam->UseGAUS() ? |
1fd9389f | 1895 | c->GetYloc(y0, sy[n], GetPadWidth()): c->GetY(); |
1896 | zc[n] = c->GetZ(); | |
2eb10c34 | 1897 | |
1898 | //optional r-phi correction | |
1899 | //printf(" n[%2d] yc[%7.5f] ", n, yc[n]); | |
1900 | Float_t correction(0.); | |
1901 | if(tilt) correction = fPad[2]*(xc[n]*dzdx + zc[n] - z0); | |
1902 | else if(pseudo) correction = fPad[2]*(xc[n]*fZfit[1] + zc[n]-fZfit[0]); | |
1903 | yc[n]-=correction; | |
1904 | //printf("corr(%s%s)[%7.5f] yc1[%7.5f]\n", (tilt?"TC":""), (zcorr?"PC":""), correction, yc[n]); | |
1fd9389f | 1905 | |
fbe11be7 | 1906 | AliDebug(5, Form(" tb[%2d] dx[%6.3f] y[%6.2f+-%6.3f]", c->GetLocalTimeBin(), xc[n], yc[n], sy[n])); |
903326c1 | 1907 | fitterY.AddPoint(&xc[n], yc[n], sy[n]); |
2eb10c34 | 1908 | if(rc) fitterZ.AddPoint(&xc[n], qc[n]*(ic<kNtb?1.:-1.), 1.); |
dd8059a8 | 1909 | n++; |
29b87567 | 1910 | } |
3044dfe5 | 1911 | |
47d5d320 | 1912 | // to few clusters |
c79857d5 | 1913 | if (n < kClmin){ |
c388cdcb | 1914 | AliDebug(1, Form("Not enough clusters to fit. Clusters: Attached[%d] Fit[%d].", GetN(), n)); |
2eb10c34 | 1915 | SetErrorMsg(kFitCl); |
c79857d5 | 1916 | return kFALSE; |
1917 | } | |
d937ad7a | 1918 | // fit XY |
903326c1 | 1919 | if(!fitterY.Eval()){ |
c388cdcb | 1920 | AliDebug(1, "Fit Y failed."); |
2eb10c34 | 1921 | SetErrorMsg(kFitFailedY); |
903326c1 | 1922 | return kFALSE; |
1923 | } | |
5f1ae1e7 | 1924 | fYfit[0] = fitterY.GetFunctionParameter(0); |
1925 | fYfit[1] = -fitterY.GetFunctionParameter(1); | |
d937ad7a | 1926 | // store covariance |
5f1ae1e7 | 1927 | Double_t p[3]; |
1928 | fitterY.GetCovarianceMatrix(p); | |
2eb10c34 | 1929 | fCov[0] = kScalePulls*p[1]; // variance of y0 |
1930 | fCov[1] = kScalePulls*p[2]; // covariance of y0, dydx | |
1931 | fCov[2] = kScalePulls*p[0]; // variance of dydx | |
b1957d3c | 1932 | // the ref radial position is set at the minimum of |
1933 | // the y variance of the tracklet | |
b72f4eaf | 1934 | fX = -fCov[1]/fCov[2]; |
2eb10c34 | 1935 | fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2]; |
1936 | ||
903326c1 | 1937 | Float_t xs=fX+.5*AliTRDgeometry::CamHght(); |
1938 | if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){ | |
1939 | AliDebug(1, Form("Ref radial position ouside chamber x[%5.2f].", fX)); | |
2eb10c34 | 1940 | SetErrorMsg(kFitFailedY); |
903326c1 | 1941 | return kFALSE; |
1942 | } | |
b1957d3c | 1943 | |
2eb10c34 | 1944 | /* // THE LEADING CLUSTER METHOD for z fit |
1fd9389f | 1945 | Float_t xMin = fX0; |
b72f4eaf | 1946 | Int_t ic=n=kNclusters-1; jc = &fClusters[ic]; |
1fd9389f | 1947 | AliTRDcluster *c0 =0x0, **kc = &fClusters[kNtb-1]; |
1948 | for(; ic>kNtb; ic--, --jc, --kc){ | |
1949 | if((c0 = (*kc)) && c0->IsInChamber() && (xMin>c0->GetX())) xMin = c0->GetX(); | |
1950 | if(!(c = (*jc))) continue; | |
1951 | if(!c->IsInChamber()) continue; | |
1952 | zc[kNclusters-1] = c->GetZ(); | |
1953 | fX = fX0 - c->GetX(); | |
1954 | } | |
1955 | fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.; | |
1956 | // Error parameterization | |
1957 | fS2Z = fdX*fZref[1]; | |
e355f67a | 1958 | fS2Z *= fS2Z; fS2Z *= 0.2887; // 1/sqrt(12)*/ |
1959 | ||
2eb10c34 | 1960 | // fit QZ |
1961 | if(opt!=1 && IsRowCross()){ | |
1962 | if(!fitterZ.Eval()) SetErrorMsg(kFitFailedZ); | |
4ecadb52 | 1963 | if(!HasError(kFitFailedZ) && TMath::Abs(fitterZ.GetFunctionParameter(1))>1.e-10){ |
2eb10c34 | 1964 | // TODO - one has to recalculate xy fit based on |
1965 | // better knowledge of z position | |
1966 | // Double_t x = -fitterZ.GetFunctionParameter(0)/fitterZ.GetFunctionParameter(1); | |
1967 | // Double_t z0 = .5*(zc[0]+zc[n-1]); | |
1968 | // fZfit[0] = z0 + fZfit[1]*x; | |
1969 | // fZfit[1] = fZfit[0]/fX0; | |
1970 | // redo fit on xy plane | |
b72f4eaf | 1971 | } |
c850c351 | 1972 | // temporary external error parameterization |
1973 | fS2Z = 0.05+0.4*TMath::Abs(fZref[1]); fS2Z *= fS2Z; | |
1974 | // TODO correct formula | |
1975 | //fS2Z = sigma_x*TMath::Abs(fZref[1]); | |
b1957d3c | 1976 | } else { |
2eb10c34 | 1977 | //fZfit[0] = zc[0] + dzdx*0.5*AliTRDgeometry::CdrHght(); |
dd8059a8 | 1978 | fS2Z = GetPadLength()*GetPadLength()/12.; |
29b87567 | 1979 | } |
29b87567 | 1980 | return kTRUE; |
e4f2f73d | 1981 | } |
1982 | ||
e4f2f73d | 1983 | |
9dcc64cc | 1984 | //____________________________________________________________________ |
1985 | Bool_t AliTRDseedV1::FitRobust(Bool_t chg) | |
e3cf3d02 | 1986 | { |
1987 | // | |
9dcc64cc | 1988 | // Linear fit of the clusters attached to the tracklet |
e3cf3d02 | 1989 | // |
9dcc64cc | 1990 | // Author |
1991 | // A.Bercuci <A.Bercuci@gsi.de> | |
e3cf3d02 | 1992 | |
9dcc64cc | 1993 | TTreeSRedirector *pstreamer(NULL); |
1994 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); | |
e3cf3d02 | 1995 | |
9dcc64cc | 1996 | // factor to scale y pulls. |
1997 | // ideally if error parametrization correct this is 1. | |
1998 | //Float_t lyScaler = 1./(AliTRDgeometry::GetLayer(fDet)+1.); | |
1999 | Float_t kScalePulls = 1.; | |
2000 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); | |
2001 | if(!calibration){ | |
2002 | AliWarning("No access to calibration data"); | |
2003 | } else { | |
2004 | // Retrieve the CDB container class with the parametric likelihood | |
2005 | const AliTRDCalTrkAttach *attach = calibration->GetAttachObject(); | |
2006 | if(!attach){ | |
2007 | AliWarning("No usable AttachClusters calib object."); | |
2008 | } else { | |
2009 | kScalePulls = attach->GetScaleCov();//*lyScaler; | |
2010 | } | |
e3cf3d02 | 2011 | } |
9dcc64cc | 2012 | Double_t xc[kNclusters], yc[kNclusters], sy[kNclusters]; |
2013 | Int_t n(0), // clusters used in fit | |
2014 | row[]={-1, 0}; // pad row spanned by the tracklet | |
2015 | AliTRDcluster *c(NULL), **jc = &fClusters[0]; | |
2016 | for(Int_t ic=0; ic<kNtb; ic++, ++jc) { | |
2017 | if(!(c = (*jc))) continue; | |
2018 | if(!c->IsInChamber()) continue; | |
2019 | if(row[0]<0){ | |
2020 | fZfit[0] = c->GetZ(); | |
2021 | fZfit[1] = 0.; | |
2022 | row[0] = c->GetPadRow(); | |
e3cf3d02 | 2023 | } |
2f4384e6 | 2024 | xc[n] = c->GetX(); |
9dcc64cc | 2025 | yc[n] = c->GetY(); |
2026 | sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08; | |
2027 | n++; | |
e3cf3d02 | 2028 | } |
9dcc64cc | 2029 | Double_t corr = fPad[2]*fPad[0]; |
e3cf3d02 | 2030 | |
9dcc64cc | 2031 | for(Int_t ic=kNtb; ic<kNclusters; ic++, ++jc) { |
2032 | if(!(c = (*jc))) continue; | |
2033 | if(!c->IsInChamber()) continue; | |
2034 | if(row[1]==0) row[1] = c->GetPadRow() - row[0]; | |
2f4384e6 | 2035 | xc[n] = c->GetX(); |
9dcc64cc | 2036 | yc[n] = c->GetY() + corr*row[1]; |
2037 | sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08; | |
2038 | n++; | |
e3cf3d02 | 2039 | } |
9dcc64cc | 2040 | UChar_t status(0); |
2f4384e6 | 2041 | Double_t par[3] = {0.,0.,fX0}, cov[3]; |
9dcc64cc | 2042 | if(!AliTRDtrackletOflHelper::Fit(n, xc, yc, sy, par, 1.5, cov)){ |
2043 | AliDebug(1, Form("Tracklet fit failed D[%03d].", fDet)); | |
2044 | SetErrorMsg(kFitCl); | |
2045 | return kFALSE; | |
e3cf3d02 | 2046 | } |
9dcc64cc | 2047 | fYfit[0] = par[0]; |
2f4384e6 | 2048 | fYfit[1] = par[1]; |
9dcc64cc | 2049 | // store covariance |
2050 | fCov[0] = kScalePulls*cov[0]; // variance of y0 | |
2051 | fCov[1] = kScalePulls*cov[2]; // covariance of y0, dydx | |
2052 | fCov[2] = kScalePulls*cov[1]; // variance of dydx | |
2053 | // the ref radial position is set at the minimum of | |
2054 | // the y variance of the tracklet | |
2f4384e6 | 2055 | fX = 0.;//-fCov[1]/fCov[2]; |
9dcc64cc | 2056 | // check radial position |
2057 | Float_t xs=fX+.5*AliTRDgeometry::CamHght(); | |
2058 | if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){ | |
2059 | AliDebug(1, Form("Ref radial position x[%5.2f] ouside D[%3d].", fX, fDet)); | |
2060 | SetErrorMsg(kFitFailedY); | |
2061 | return kFALSE; | |
e3cf3d02 | 2062 | } |
9dcc64cc | 2063 | fS2Y = fCov[0] + fX*fCov[1]; |
2064 | fS2Z = fPad[0]*fPad[0]/12.; | |
2065 | AliDebug(2, Form("[I] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[cm]=%6.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z))); | |
2066 | if(IsRowCross()){ | |
2067 | Float_t x,z; | |
2068 | if(!GetEstimatedCrossPoint(x,z)){ | |
2f4384e6 | 2069 | AliDebug(2, Form("Failed(I) getting crossing point D[%03d].", fDet)); |
9dcc64cc | 2070 | SetErrorMsg(kFitFailedY); |
2071 | return kTRUE; | |
2072 | } | |
2f4384e6 | 2073 | //if(IsPrimary()){ |
2074 | fZfit[0] = fX0*z/x; | |
9dcc64cc | 2075 | fZfit[1] = z/x; |
2076 | fS2Z = 0.05+0.4*TMath::Abs(fZfit[1]); fS2Z *= fS2Z; | |
2f4384e6 | 2077 | //} |
2078 | AliDebug(2, Form("s2y[%f] s2z[%f]", fS2Y, fS2Z)); | |
9dcc64cc | 2079 | AliDebug(2, Form("[II] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[um]=%6.2f dzdx[deg]=%+5.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)*1.e4, TMath::ATan(fZfit[1])*TMath::RadToDeg())); |
e3cf3d02 | 2080 | } |
e3cf3d02 | 2081 | |
9dcc64cc | 2082 | if(pstreamer){ |
2083 | Float_t x= fX0 -fX, | |
2084 | y = GetY(), | |
2085 | yt = fYref[0]-fX*fYref[1]; | |
2086 | SETBIT(status, 2); | |
2087 | TVectorD vcov(3); vcov[0]=cov[0];vcov[1]=cov[1];vcov[2]=cov[2]; | |
2088 | Double_t sm(0.), chi2(0.), tmp, dy[kNclusters]; | |
2089 | for(Int_t ic(0); ic<n; ic++){ | |
2090 | sm += sy[ic]; | |
2f4384e6 | 2091 | dy[ic] = yc[ic]-(fYfit[0]+(xc[ic]-fX0)*fYfit[1]); tmp = dy[ic]/sy[ic]; |
9dcc64cc | 2092 | chi2 += tmp*tmp; |
2093 | } | |
2094 | sm /= n; chi2 = TMath::Sqrt(chi2); | |
2095 | Double_t m(0.), s(0.); | |
2096 | AliMathBase::EvaluateUni(n, dy, m, s, 0); | |
2097 | (*pstreamer) << "FitRobust4" | |
2098 | << "stat=" << status | |
2099 | << "chg=" << chg | |
2100 | << "ncl=" << n | |
2101 | << "det=" << fDet | |
2102 | << "x0=" << fX0 | |
2103 | << "y0=" << fYfit[0] | |
2104 | << "x=" << x | |
2105 | << "y=" << y | |
2106 | << "dydx=" << fYfit[1] | |
2107 | << "pt=" << fPt | |
2108 | << "yt=" << yt | |
2109 | << "dydxt="<< fYref[1] | |
2110 | << "cov=" << &vcov | |
2111 | << "chi2=" << chi2 | |
2112 | << "sm=" << sm | |
2113 | << "ss=" << s | |
2114 | << "\n"; | |
2115 | } | |
2116 | return kTRUE; | |
2117 | } | |
e3cf3d02 | 2118 | |
e4f2f73d | 2119 | //___________________________________________________________________ |
203967fc | 2120 | void AliTRDseedV1::Print(Option_t *o) const |
e4f2f73d | 2121 | { |
2122 | // | |
2123 | // Printing the seedstatus | |
2124 | // | |
2125 | ||
b72f4eaf | 2126 | AliInfo(Form("Det[%3d] X0[%7.2f] Pad{L[%5.2f] W[%5.2f] Tilt[%+6.2f]}", fDet, fX0, GetPadLength(), GetPadWidth(), GetTilt())); |
dd8059a8 | 2127 | AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d] [%d]", GetN(), GetNUsed(), GetNShared(), fN)); |
b72f4eaf | 2128 | AliInfo(Form("FLAGS : RC[%c] Kink[%c] SA[%c]", IsRowCross()?'y':'n', IsKink()?'y':'n', IsStandAlone()?'y':'n')); |
525f399b | 2129 | AliInfo(Form("CALIB PARAMS : T0[%5.2f] Vd[%5.2f] s2PRF[%5.2f] ExB[%5.2f] Dl[%5.2f] Dt[%5.2f]", fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT)); |
dd8059a8 | 2130 | |
2131 | Double_t cov[3], x=GetX(); | |
2132 | GetCovAt(x, cov); | |
2133 | AliInfo(" | x[cm] | y[cm] | z[cm] | dydx | dzdx |"); | |
2134 | AliInfo(Form("Fit | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | ----- |", x, GetY(), TMath::Sqrt(cov[0]), GetZ(), TMath::Sqrt(cov[2]), fYfit[1])); | |
21aad919 | 2135 | AliInfo(Form("Ref | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | %5.2f |", x, fYref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[0]), fZref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[2]), fYref[1], fZref[1])); |
ee8fb199 | 2136 | AliInfo(Form("P / Pt [GeV/c] = %f / %f", GetMomentum(), fPt)); |
68f9b6bd | 2137 | if(IsStandAlone()) AliInfo(Form("C Rieman / Vertex [1/cm] = %f / %f", fC[0], fC[1])); |
ee8fb199 | 2138 | AliInfo(Form("dEdx [a.u.] = %f / %f / %f / %f / %f/ %f / %f / %f", fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7])); |
2139 | AliInfo(Form("PID = %5.3f / %5.3f / %5.3f / %5.3f / %5.3f", fProb[0], fProb[1], fProb[2], fProb[3], fProb[4])); | |
203967fc | 2140 | |
2141 | if(strcmp(o, "a")!=0) return; | |
2142 | ||
4dc4dc2e | 2143 | AliTRDcluster* const* jc = &fClusters[0]; |
8d2bec9e | 2144 | for(int ic=0; ic<kNclusters; ic++, jc++) { |
4dc4dc2e | 2145 | if(!(*jc)) continue; |
203967fc | 2146 | (*jc)->Print(o); |
4dc4dc2e | 2147 | } |
e4f2f73d | 2148 | } |
47d5d320 | 2149 | |
203967fc | 2150 | |
2151 | //___________________________________________________________________ | |
2152 | Bool_t AliTRDseedV1::IsEqual(const TObject *o) const | |
2153 | { | |
2154 | // Checks if current instance of the class has the same essential members | |
2155 | // as the given one | |
2156 | ||
2157 | if(!o) return kFALSE; | |
2158 | const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o); | |
2159 | if(!inTracklet) return kFALSE; | |
2160 | ||
2161 | for (Int_t i = 0; i < 2; i++){ | |
e3cf3d02 | 2162 | if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE; |
2163 | if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE; | |
203967fc | 2164 | } |
2165 | ||
4ecadb52 | 2166 | if ( TMath::Abs(fS2Y - inTracklet->fS2Y)>1.e-10 ) return kFALSE; |
2167 | if ( TMath::Abs(GetTilt() - inTracklet->GetTilt())>1.e-10 ) return kFALSE; | |
2168 | if ( TMath::Abs(GetPadLength() - inTracklet->GetPadLength())>1.e-10 ) return kFALSE; | |
203967fc | 2169 | |
8d2bec9e | 2170 | for (Int_t i = 0; i < kNclusters; i++){ |
e3cf3d02 | 2171 | // if ( fX[i] != inTracklet->GetX(i) ) return kFALSE; |
2172 | // if ( fY[i] != inTracklet->GetY(i) ) return kFALSE; | |
2173 | // if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE; | |
2174 | if ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE; | |
203967fc | 2175 | } |
f29f13a6 | 2176 | // if ( fUsable != inTracklet->fUsable ) return kFALSE; |
203967fc | 2177 | |
2178 | for (Int_t i=0; i < 2; i++){ | |
e3cf3d02 | 2179 | if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE; |
2180 | if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE; | |
2181 | if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE; | |
203967fc | 2182 | } |
2183 | ||
e3cf3d02 | 2184 | /* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE; |
2185 | if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/ | |
3e778975 | 2186 | if ( fN != inTracklet->fN ) return kFALSE; |
2187 | //if ( fNUsed != inTracklet->fNUsed ) return kFALSE; | |
e3cf3d02 | 2188 | //if ( fFreq != inTracklet->GetFreq() ) return kFALSE; |
2189 | //if ( fNChange != inTracklet->GetNChange() ) return kFALSE; | |
203967fc | 2190 | |
4ecadb52 | 2191 | if ( TMath::Abs(fC[0] - inTracklet->fC[0])>1.e-10 ) return kFALSE; |
e3cf3d02 | 2192 | //if ( fCC != inTracklet->GetCC() ) return kFALSE; |
4ecadb52 | 2193 | if ( TMath::Abs(fChi2 - inTracklet->fChi2)>1.e-10 ) return kFALSE; |
203967fc | 2194 | // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE; |
2195 | ||
e3cf3d02 | 2196 | if ( fDet != inTracklet->fDet ) return kFALSE; |
4ecadb52 | 2197 | if ( TMath::Abs(fPt - inTracklet->fPt)>1.e-10 ) return kFALSE; |
2198 | if ( TMath::Abs(fdX - inTracklet->fdX)>1.e-10 ) return kFALSE; | |
203967fc | 2199 | |
8d2bec9e | 2200 | for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){ |
203967fc | 2201 | AliTRDcluster *curCluster = fClusters[iCluster]; |
e3cf3d02 | 2202 | AliTRDcluster *inCluster = inTracklet->fClusters[iCluster]; |
203967fc | 2203 | if (curCluster && inCluster){ |
2204 | if (! curCluster->IsEqual(inCluster) ) { | |
2205 | curCluster->Print(); | |
2206 | inCluster->Print(); | |
2207 | return kFALSE; | |
2208 | } | |
2209 | } else { | |
2210 | // if one cluster exists, and corresponding | |
2211 | // in other tracklet doesn't - return kFALSE | |
2212 | if(curCluster || inCluster) return kFALSE; | |
2213 | } | |
2214 | } | |
2215 | return kTRUE; | |
2216 | } | |
5d401b45 | 2217 |