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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" | |
eb38ed55 | 39 | #include <TTreeStream.h> |
e4f2f73d | 40 | |
41 | #include "AliLog.h" | |
42 | #include "AliMathBase.h" | |
4ecadb52 | 43 | #include "AliRieman.h" |
d937ad7a | 44 | #include "AliCDBManager.h" |
e4f2f73d | 45 | |
4ecadb52 | 46 | #include "AliTRDReconstructor.h" |
03cef9b2 | 47 | #include "AliTRDpadPlane.h" |
e4f2f73d | 48 | #include "AliTRDcluster.h" |
f3d3af1b | 49 | #include "AliTRDseedV1.h" |
50 | #include "AliTRDtrackV1.h" | |
e4f2f73d | 51 | #include "AliTRDcalibDB.h" |
eb38ed55 | 52 | #include "AliTRDchamberTimeBin.h" |
53 | #include "AliTRDtrackingChamber.h" | |
54 | #include "AliTRDtrackerV1.h" | |
e4f2f73d | 55 | #include "AliTRDrecoParam.h" |
a076fc2f | 56 | #include "AliTRDCommonParam.h" |
d937ad7a | 57 | |
0906e73e | 58 | #include "Cal/AliTRDCalPID.h" |
d937ad7a | 59 | #include "Cal/AliTRDCalROC.h" |
60 | #include "Cal/AliTRDCalDet.h" | |
e4f2f73d | 61 | |
4ecadb52 | 62 | class AliTracker; |
63 | ||
e4f2f73d | 64 | ClassImp(AliTRDseedV1) |
65 | ||
66 | //____________________________________________________________________ | |
ae4e8b84 | 67 | AliTRDseedV1::AliTRDseedV1(Int_t det) |
3e778975 | 68 | :AliTRDtrackletBase() |
4d6aee34 | 69 | ,fkReconstructor(NULL) |
70 | ,fClusterIter(NULL) | |
e3cf3d02 | 71 | ,fExB(0.) |
72 | ,fVD(0.) | |
73 | ,fT0(0.) | |
74 | ,fS2PRF(0.) | |
75 | ,fDiffL(0.) | |
76 | ,fDiffT(0.) | |
ae4e8b84 | 77 | ,fClusterIdx(0) |
7c3eecb8 | 78 | ,fErrorMsg(0) |
3e778975 | 79 | ,fN(0) |
ae4e8b84 | 80 | ,fDet(det) |
b25a5e9e | 81 | ,fPt(0.) |
bcb6fb78 | 82 | ,fdX(0.) |
e3cf3d02 | 83 | ,fX0(0.) |
84 | ,fX(0.) | |
85 | ,fY(0.) | |
86 | ,fZ(0.) | |
87 | ,fS2Y(0.) | |
88 | ,fS2Z(0.) | |
e3cf3d02 | 89 | ,fChi2(0.) |
e4f2f73d | 90 | { |
91 | // | |
92 | // Constructor | |
93 | // | |
f301a656 | 94 | memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0])); |
8d2bec9e | 95 | memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*)); |
2eb10c34 | 96 | memset(fPad, 0, 4*sizeof(Float_t)); |
e3cf3d02 | 97 | fYref[0] = 0.; fYref[1] = 0.; |
98 | fZref[0] = 0.; fZref[1] = 0.; | |
99 | fYfit[0] = 0.; fYfit[1] = 0.; | |
100 | fZfit[0] = 0.; fZfit[1] = 0.; | |
8d2bec9e | 101 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
29b87567 | 102 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
e3cf3d02 | 103 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels |
104 | fLabels[2]=0; // number of different labels for tracklet | |
16cca13f | 105 | memset(fRefCov, 0, 7*sizeof(Double_t)); |
68f9b6bd | 106 | // stand alone curvature |
107 | fC[0] = 0.; fC[1] = 0.; | |
d937ad7a | 108 | // covariance matrix [diagonal] |
109 | // default sy = 200um and sz = 2.3 cm | |
110 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; | |
f29f13a6 | 111 | SetStandAlone(kFALSE); |
e4f2f73d | 112 | } |
113 | ||
114 | //____________________________________________________________________ | |
0906e73e | 115 | AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref) |
3e778975 | 116 | :AliTRDtrackletBase((AliTRDtrackletBase&)ref) |
4d6aee34 | 117 | ,fkReconstructor(NULL) |
118 | ,fClusterIter(NULL) | |
e3cf3d02 | 119 | ,fExB(0.) |
120 | ,fVD(0.) | |
121 | ,fT0(0.) | |
122 | ,fS2PRF(0.) | |
123 | ,fDiffL(0.) | |
124 | ,fDiffT(0.) | |
ae4e8b84 | 125 | ,fClusterIdx(0) |
7c3eecb8 | 126 | ,fErrorMsg(0) |
3e778975 | 127 | ,fN(0) |
e3cf3d02 | 128 | ,fDet(-1) |
b25a5e9e | 129 | ,fPt(0.) |
e3cf3d02 | 130 | ,fdX(0.) |
131 | ,fX0(0.) | |
132 | ,fX(0.) | |
133 | ,fY(0.) | |
134 | ,fZ(0.) | |
135 | ,fS2Y(0.) | |
136 | ,fS2Z(0.) | |
e3cf3d02 | 137 | ,fChi2(0.) |
e4f2f73d | 138 | { |
139 | // | |
140 | // Copy Constructor performing a deep copy | |
141 | // | |
e3cf3d02 | 142 | if(this != &ref){ |
143 | ref.Copy(*this); | |
144 | } | |
29b87567 | 145 | SetBit(kOwner, kFALSE); |
f29f13a6 | 146 | SetStandAlone(ref.IsStandAlone()); |
fbb2ea06 | 147 | } |
d9950a5a | 148 | |
0906e73e | 149 | |
e4f2f73d | 150 | //____________________________________________________________________ |
151 | AliTRDseedV1& AliTRDseedV1::operator=(const AliTRDseedV1 &ref) | |
152 | { | |
153 | // | |
154 | // Assignment Operator using the copy function | |
155 | // | |
156 | ||
29b87567 | 157 | if(this != &ref){ |
158 | ref.Copy(*this); | |
159 | } | |
221ab7e0 | 160 | SetBit(kOwner, kFALSE); |
161 | ||
29b87567 | 162 | return *this; |
e4f2f73d | 163 | } |
164 | ||
165 | //____________________________________________________________________ | |
166 | AliTRDseedV1::~AliTRDseedV1() | |
167 | { | |
168 | // | |
169 | // Destructor. The RecoParam object belongs to the underlying tracker. | |
170 | // | |
171 | ||
29b87567 | 172 | //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO"); |
e4f2f73d | 173 | |
e3cf3d02 | 174 | if(IsOwner()) { |
8d2bec9e | 175 | for(int itb=0; itb<kNclusters; itb++){ |
29b87567 | 176 | if(!fClusters[itb]) continue; |
177 | //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb)); | |
178 | delete fClusters[itb]; | |
4d6aee34 | 179 | fClusters[itb] = NULL; |
29b87567 | 180 | } |
e3cf3d02 | 181 | } |
e4f2f73d | 182 | } |
183 | ||
184 | //____________________________________________________________________ | |
185 | void AliTRDseedV1::Copy(TObject &ref) const | |
186 | { | |
187 | // | |
188 | // Copy function | |
189 | // | |
190 | ||
29b87567 | 191 | //AliInfo(""); |
192 | AliTRDseedV1 &target = (AliTRDseedV1 &)ref; | |
193 | ||
4d6aee34 | 194 | target.fkReconstructor = fkReconstructor; |
195 | target.fClusterIter = NULL; | |
e3cf3d02 | 196 | target.fExB = fExB; |
197 | target.fVD = fVD; | |
198 | target.fT0 = fT0; | |
199 | target.fS2PRF = fS2PRF; | |
200 | target.fDiffL = fDiffL; | |
201 | target.fDiffT = fDiffT; | |
ae4e8b84 | 202 | target.fClusterIdx = 0; |
7c3eecb8 | 203 | target.fErrorMsg = fErrorMsg; |
3e778975 | 204 | target.fN = fN; |
ae4e8b84 | 205 | target.fDet = fDet; |
b25a5e9e | 206 | target.fPt = fPt; |
29b87567 | 207 | target.fdX = fdX; |
e3cf3d02 | 208 | target.fX0 = fX0; |
209 | target.fX = fX; | |
210 | target.fY = fY; | |
211 | target.fZ = fZ; | |
212 | target.fS2Y = fS2Y; | |
213 | target.fS2Z = fS2Z; | |
e3cf3d02 | 214 | target.fChi2 = fChi2; |
29b87567 | 215 | |
8d2bec9e | 216 | memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t)); |
217 | memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*)); | |
2eb10c34 | 218 | memcpy(target.fPad, fPad, 4*sizeof(Float_t)); |
e3cf3d02 | 219 | target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1]; |
220 | target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1]; | |
221 | target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1]; | |
222 | target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1]; | |
8d2bec9e | 223 | memcpy(target.fdEdx, fdEdx, kNslices*sizeof(Float_t)); |
e3cf3d02 | 224 | memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t)); |
225 | memcpy(target.fLabels, fLabels, 3*sizeof(Int_t)); | |
16cca13f | 226 | memcpy(target.fRefCov, fRefCov, 7*sizeof(Double_t)); |
68f9b6bd | 227 | target.fC[0] = fC[0]; target.fC[1] = fC[1]; |
e3cf3d02 | 228 | memcpy(target.fCov, fCov, 3*sizeof(Double_t)); |
29b87567 | 229 | |
e3cf3d02 | 230 | TObject::Copy(ref); |
e4f2f73d | 231 | } |
232 | ||
0906e73e | 233 | |
4ecadb52 | 234 | //____________________________________________________________ |
235 | void AliTRDseedV1::Init(const AliRieman *rieman) | |
236 | { | |
237 | // Initialize this tracklet using the riemann fit information | |
238 | ||
239 | ||
240 | fZref[0] = rieman->GetZat(fX0); | |
241 | fZref[1] = rieman->GetDZat(fX0); | |
242 | fYref[0] = rieman->GetYat(fX0); | |
243 | fYref[1] = rieman->GetDYat(fX0); | |
244 | if(fkReconstructor && fkReconstructor->IsHLT()){ | |
245 | fRefCov[0] = 1; | |
246 | fRefCov[2] = 10; | |
247 | }else{ | |
248 | fRefCov[0] = rieman->GetErrY(fX0); | |
249 | fRefCov[2] = rieman->GetErrZ(fX0); | |
250 | } | |
251 | fC[0] = rieman->GetC(); | |
252 | fChi2 = rieman->GetChi2(); | |
253 | } | |
254 | ||
255 | ||
0906e73e | 256 | //____________________________________________________________ |
f3d3af1b | 257 | Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track) |
0906e73e | 258 | { |
259 | // Initialize this tracklet using the track information | |
260 | // | |
261 | // Parameters: | |
262 | // track - the TRD track used to initialize the tracklet | |
263 | // | |
264 | // Detailed description | |
265 | // The function sets the starting point and direction of the | |
266 | // tracklet according to the information from the TRD track. | |
267 | // | |
268 | // Caution | |
269 | // The TRD track has to be propagated to the beginning of the | |
270 | // chamber where the tracklet will be constructed | |
271 | // | |
272 | ||
29b87567 | 273 | Double_t y, z; |
274 | if(!track->GetProlongation(fX0, y, z)) return kFALSE; | |
16cca13f | 275 | Update(track); |
29b87567 | 276 | return kTRUE; |
0906e73e | 277 | } |
278 | ||
bcb6fb78 | 279 | |
e3cf3d02 | 280 | //_____________________________________________________________________________ |
980d5a2a | 281 | void AliTRDseedV1::Reset(Option_t *opt) |
e3cf3d02 | 282 | { |
980d5a2a | 283 | // |
284 | // Reset seed. If option opt="c" is given only cluster arrays are cleared. | |
285 | // | |
286 | for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1; | |
287 | memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*)); | |
560e5c05 | 288 | fN=0; SetBit(kRowCross, kFALSE); |
980d5a2a | 289 | if(strcmp(opt, "c")==0) return; |
290 | ||
e3cf3d02 | 291 | fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.; |
292 | fDiffL=0.;fDiffT=0.; | |
3e778975 | 293 | fClusterIdx=0; |
7c3eecb8 | 294 | fErrorMsg = 0; |
dd8059a8 | 295 | fDet=-1; |
b25a5e9e | 296 | fPt=0.; |
e3cf3d02 | 297 | fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.; |
298 | fS2Y=0.; fS2Z=0.; | |
68f9b6bd | 299 | fC[0]=0.; fC[1]=0.; |
300 | fChi2 = 0.; | |
e3cf3d02 | 301 | |
2eb10c34 | 302 | memset(fPad, 0, 4*sizeof(Float_t)); |
e3cf3d02 | 303 | fYref[0] = 0.; fYref[1] = 0.; |
304 | fZref[0] = 0.; fZref[1] = 0.; | |
305 | fYfit[0] = 0.; fYfit[1] = 0.; | |
306 | fZfit[0] = 0.; fZfit[1] = 0.; | |
8d2bec9e | 307 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
e3cf3d02 | 308 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
309 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels | |
310 | fLabels[2]=0; // number of different labels for tracklet | |
16cca13f | 311 | memset(fRefCov, 0, 7*sizeof(Double_t)); |
e3cf3d02 | 312 | // covariance matrix [diagonal] |
313 | // default sy = 200um and sz = 2.3 cm | |
314 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; | |
315 | } | |
316 | ||
b1957d3c | 317 | //____________________________________________________________________ |
16cca13f | 318 | void AliTRDseedV1::Update(const AliTRDtrackV1 *trk) |
b1957d3c | 319 | { |
320 | // update tracklet reference position from the TRD track | |
b1957d3c | 321 | |
e3cf3d02 | 322 | Double_t fSnp = trk->GetSnp(); |
323 | Double_t fTgl = trk->GetTgl(); | |
b25a5e9e | 324 | fPt = trk->Pt(); |
bfd20868 | 325 | Double_t norm =1./TMath::Sqrt((1.-fSnp)*(1.+fSnp)); |
1fd9389f | 326 | fYref[1] = fSnp*norm; |
327 | fZref[1] = fTgl*norm; | |
b1957d3c | 328 | SetCovRef(trk->GetCovariance()); |
329 | ||
330 | Double_t dx = trk->GetX() - fX0; | |
331 | fYref[0] = trk->GetY() - dx*fYref[1]; | |
332 | fZref[0] = trk->GetZ() - dx*fZref[1]; | |
333 | } | |
334 | ||
e3cf3d02 | 335 | //_____________________________________________________________________________ |
336 | void AliTRDseedV1::UpdateUsed() | |
337 | { | |
338 | // | |
f29f13a6 | 339 | // Calculate number of used clusers in the tracklet |
e3cf3d02 | 340 | // |
341 | ||
3e778975 | 342 | Int_t nused = 0, nshared = 0; |
8d2bec9e | 343 | for (Int_t i = kNclusters; i--; ) { |
e3cf3d02 | 344 | if (!fClusters[i]) continue; |
3e778975 | 345 | if(fClusters[i]->IsUsed()){ |
346 | nused++; | |
347 | } else if(fClusters[i]->IsShared()){ | |
348 | if(IsStandAlone()) nused++; | |
349 | else nshared++; | |
350 | } | |
e3cf3d02 | 351 | } |
3e778975 | 352 | SetNUsed(nused); |
353 | SetNShared(nshared); | |
e3cf3d02 | 354 | } |
355 | ||
356 | //_____________________________________________________________________________ | |
357 | void AliTRDseedV1::UseClusters() | |
358 | { | |
359 | // | |
360 | // Use clusters | |
361 | // | |
f29f13a6 | 362 | // In stand alone mode: |
363 | // Clusters which are marked as used or shared from another track are | |
364 | // removed from the tracklet | |
365 | // | |
366 | // In barrel mode: | |
367 | // - Clusters which are used by another track become shared | |
368 | // - Clusters which are attached to a kink track become shared | |
369 | // | |
e3cf3d02 | 370 | AliTRDcluster **c = &fClusters[0]; |
8d2bec9e | 371 | for (Int_t ic=kNclusters; ic--; c++) { |
e3cf3d02 | 372 | if(!(*c)) continue; |
f29f13a6 | 373 | if(IsStandAlone()){ |
374 | if((*c)->IsShared() || (*c)->IsUsed()){ | |
b82b4de1 | 375 | if((*c)->IsShared()) SetNShared(GetNShared()-1); |
376 | else SetNUsed(GetNUsed()-1); | |
4d6aee34 | 377 | (*c) = NULL; |
f29f13a6 | 378 | fIndexes[ic] = -1; |
3e778975 | 379 | SetN(GetN()-1); |
3e778975 | 380 | continue; |
f29f13a6 | 381 | } |
3e778975 | 382 | } else { |
f29f13a6 | 383 | if((*c)->IsUsed() || IsKink()){ |
3e778975 | 384 | (*c)->SetShared(); |
385 | continue; | |
f29f13a6 | 386 | } |
387 | } | |
388 | (*c)->Use(); | |
e3cf3d02 | 389 | } |
390 | } | |
391 | ||
392 | ||
f29f13a6 | 393 | |
bcb6fb78 | 394 | //____________________________________________________________________ |
395 | void AliTRDseedV1::CookdEdx(Int_t nslices) | |
396 | { | |
397 | // Calculates average dE/dx for all slices and store them in the internal array fdEdx. | |
398 | // | |
399 | // Parameters: | |
400 | // nslices : number of slices for which dE/dx should be calculated | |
401 | // Output: | |
402 | // store results in the internal array fdEdx. This can be accessed with the method | |
403 | // AliTRDseedV1::GetdEdx() | |
404 | // | |
405 | // Detailed description | |
406 | // Calculates average dE/dx for all slices. Depending on the PID methode | |
407 | // the number of slices can be 3 (LQ) or 8(NN). | |
3ee48d6e | 408 | // The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t)) |
bcb6fb78 | 409 | // |
410 | // The following effects are included in the calculation: | |
411 | // 1. calibration values for t0 and vdrift (using x coordinate to calculate slice) | |
412 | // 2. cluster sharing (optional see AliTRDrecoParam::SetClusterSharing()) | |
413 | // 3. cluster size | |
414 | // | |
415 | ||
8d2bec9e | 416 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
e73abf77 | 417 | const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
29b87567 | 418 | |
0d80a563 | 419 | AliTRDcluster *c(NULL); |
420 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ | |
421 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; | |
422 | Float_t dx = TMath::Abs(fX0 - c->GetX()); | |
423 | ||
29b87567 | 424 | // Filter clusters for dE/dx calculation |
0d80a563 | 425 | |
29b87567 | 426 | // 1.consider calibration effects for slice determination |
0d80a563 | 427 | Int_t slice; |
428 | if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber() | |
429 | slice = Int_t(dx * nslices / kDriftLength); | |
430 | } else slice = c->GetX() < fX0 ? nslices-1 : 0; | |
431 | ||
e73abf77 | 432 | |
29b87567 | 433 | // 2. take sharing into account |
3e778975 | 434 | Float_t w = /*c->IsShared() ? .5 :*/ 1.; |
0d80a563 | 435 | |
29b87567 | 436 | // 3. take into account large clusters TODO |
437 | //w *= c->GetNPads() > 3 ? .8 : 1.; | |
85b917f6 | 438 | |
0d80a563 | 439 | //CHECK !!! |
440 | fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic]; | |
441 | } // End of loop over clusters | |
bcb6fb78 | 442 | } |
443 | ||
e3cf3d02 | 444 | //_____________________________________________________________________________ |
445 | void AliTRDseedV1::CookLabels() | |
446 | { | |
447 | // | |
448 | // Cook 2 labels for seed | |
449 | // | |
450 | ||
451 | Int_t labels[200]; | |
452 | Int_t out[200]; | |
453 | Int_t nlab = 0; | |
8d2bec9e | 454 | for (Int_t i = 0; i < kNclusters; i++) { |
e3cf3d02 | 455 | if (!fClusters[i]) continue; |
456 | for (Int_t ilab = 0; ilab < 3; ilab++) { | |
457 | if (fClusters[i]->GetLabel(ilab) >= 0) { | |
458 | labels[nlab] = fClusters[i]->GetLabel(ilab); | |
459 | nlab++; | |
460 | } | |
461 | } | |
462 | } | |
463 | ||
fac58f00 | 464 | fLabels[2] = AliMathBase::Freq(nlab,labels,out,kTRUE); |
e3cf3d02 | 465 | fLabels[0] = out[0]; |
466 | if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2]; | |
467 | } | |
468 | ||
2eb10c34 | 469 | //____________________________________________________________ |
470 | Float_t AliTRDseedV1::GetAnodeWireOffset(Float_t zt) | |
471 | { | |
4ecadb52 | 472 | // Find position inside the amplification cell for reading drift velocity map |
473 | ||
2eb10c34 | 474 | Float_t d = fPad[3] - zt; |
475 | if(d<0.){ | |
476 | AliError(Form("Fail AnodeWireOffset calculation z0[%+7.2f] zt[%+7.2f] d[%+7.2f].", fPad[3], zt, d)); | |
477 | return 0.125; | |
478 | } | |
479 | d -= ((Int_t)(2 * d)) / 2.0; | |
480 | if(d > 0.25) d = 0.5 - d; | |
481 | return d; | |
482 | } | |
483 | ||
e3cf3d02 | 484 | |
85b917f6 | 485 | //____________________________________________________________________ |
486 | Float_t AliTRDseedV1::GetCharge(Bool_t useOutliers) | |
487 | { | |
488 | // Computes total charge attached to tracklet. If "useOutliers" is set clusters | |
489 | // which are not in chamber are also used (default false) | |
490 | ||
491 | AliTRDcluster *c(NULL); Float_t qt(0.); | |
492 | for(int ic=0; ic<kNclusters; ic++){ | |
493 | if(!(c=fClusters[ic])) continue; | |
494 | if(c->IsInChamber() && !useOutliers) continue; | |
495 | qt += TMath::Abs(c->GetQ()); | |
496 | } | |
497 | return qt; | |
498 | } | |
499 | ||
e1bcf0af | 500 | //____________________________________________________________________ |
501 | Bool_t AliTRDseedV1::GetEstimatedCrossPoint(Float_t &x, Float_t &z) const | |
502 | { | |
503 | // Algorithm to estimate cross point in the x-z plane for pad row cross tracklets. | |
504 | // Returns true in case of success. | |
505 | if(!IsRowCross()) return kFALSE; | |
506 | ||
507 | x=0.; z=0.; | |
508 | AliTRDcluster *c(NULL); | |
509 | // Find radial range for first row | |
510 | Float_t x1[] = {0., 1.e3}; | |
511 | for(int ic=0; ic<kNtb; ic++){ | |
512 | if(!(c=fClusters[ic])) continue; | |
513 | if(!c->IsInChamber()) continue; | |
514 | if(c->GetX() <= x1[1]) x1[1] = c->GetX(); | |
515 | if(c->GetX() >= x1[0]) x1[0] = c->GetX(); | |
516 | z=c->GetZ(); | |
517 | } | |
518 | if((x1[0] - x1[1])<1.e-5) return kFALSE; | |
519 | ||
520 | // Find radial range for second row | |
521 | Bool_t kZ(kFALSE); | |
522 | Float_t x2[] = {0., 1.e3}; | |
523 | for(int ic=kNtb; ic<kNclusters; ic++){ | |
524 | if(!(c=fClusters[ic])) continue; | |
525 | if(!c->IsInChamber()) continue; | |
526 | if(c->GetX() <= x2[1]) x2[1] = c->GetX(); | |
527 | if(c->GetX() >= x2[0]) x2[0] = c->GetX(); | |
528 | if(!kZ){ | |
529 | z+=c->GetZ(); | |
530 | z*=0.5; | |
531 | kZ=kTRUE; | |
532 | } | |
533 | } | |
534 | if((x2[0] - x2[1])<1.e-5) return kFALSE; | |
535 | ||
536 | // Find intersection of the 2 radial regions | |
537 | x = 0.5*((x1[0]+x1[1] > x2[0]+x2[1]) ? (x1[1]+x2[0]) : (x1[0]+x2[1])); | |
538 | return kTRUE; | |
539 | } | |
540 | ||
bcb6fb78 | 541 | //____________________________________________________________________ |
0b433f72 | 542 | Float_t AliTRDseedV1::GetdQdl(Int_t ic, Float_t *dl) const |
bcb6fb78 | 543 | { |
3ee48d6e | 544 | // Using the linear approximation of the track inside one TRD chamber (TRD tracklet) |
545 | // the charge per unit length can be written as: | |
546 | // BEGIN_LATEX | |
500851ab | 547 | // #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dz}{dx}}^{2}_{ref}}} |
3ee48d6e | 548 | // END_LATEX |
549 | // where qc is the total charge collected in the current time bin and dx is the length | |
0b433f72 | 550 | // of the time bin. |
551 | // The following correction are applied : | |
552 | // - charge : pad row cross corrections | |
553 | // [diffusion and TRF assymetry] TODO | |
554 | // - dx : anisochronity, track inclination - see Fit and AliTRDcluster::GetXloc() | |
555 | // and AliTRDcluster::GetYloc() for the effects taken into account | |
3ee48d6e | 556 | // |
0fa1a8ee | 557 | //Begin_Html |
558 | //<img src="TRD/trackletDQDT.gif"> | |
559 | //End_Html | |
560 | // In the picture the energy loss measured on the tracklet as a function of drift time [left] and respectively | |
561 | // drift length [right] for different particle species is displayed. | |
3ee48d6e | 562 | // Author : Alex Bercuci <A.Bercuci@gsi.de> |
563 | // | |
564 | Float_t dq = 0.; | |
5d401b45 | 565 | // check whether both clusters are inside the chamber |
566 | Bool_t hasClusterInChamber = kFALSE; | |
567 | if(fClusters[ic] && fClusters[ic]->IsInChamber()){ | |
568 | hasClusterInChamber = kTRUE; | |
1742f24c | 569 | dq += TMath::Abs(fClusters[ic]->GetQ()); |
b30d8c09 | 570 | } |
571 | if(fClusters[ic+kNtb] && fClusters[ic+kNtb]->IsInChamber()){ | |
5d401b45 | 572 | hasClusterInChamber = kTRUE; |
573 | dq += TMath::Abs(fClusters[ic+kNtb]->GetQ()); | |
1742f24c | 574 | } |
5d401b45 | 575 | if(!hasClusterInChamber) return 0.; |
0b433f72 | 576 | if(dq<1.e-3) return 0.; |
3ee48d6e | 577 | |
a2abcbc5 | 578 | Double_t dx = fdX; |
579 | if(ic-1>=0 && ic+1<kNtb){ | |
580 | Float_t x2(0.), x1(0.); | |
5d401b45 | 581 | // try to estimate upper radial position (find the cluster which is inside the chamber) |
582 | if(fClusters[ic-1] && fClusters[ic-1]->IsInChamber()) x2 = fClusters[ic-1]->GetX(); | |
583 | else if(fClusters[ic-1+kNtb] && fClusters[ic-1+kNtb]->IsInChamber()) x2 = fClusters[ic-1+kNtb]->GetX(); | |
584 | else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x2 = fClusters[ic]->GetX()+fdX; | |
a2abcbc5 | 585 | else x2 = fClusters[ic+kNtb]->GetX()+fdX; |
5d401b45 | 586 | // try to estimate lower radial position (find the cluster which is inside the chamber) |
587 | if(fClusters[ic+1] && fClusters[ic+1]->IsInChamber()) x1 = fClusters[ic+1]->GetX(); | |
588 | else if(fClusters[ic+1+kNtb] && fClusters[ic+1+kNtb]->IsInChamber()) x1 = fClusters[ic+1+kNtb]->GetX(); | |
589 | else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x1 = fClusters[ic]->GetX()-fdX; | |
a2abcbc5 | 590 | else x1 = fClusters[ic+kNtb]->GetX()-fdX; |
591 | ||
592 | dx = .5*(x2 - x1); | |
593 | } | |
0b433f72 | 594 | dx *= TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]); |
0b433f72 | 595 | if(dl) (*dl) = dx; |
283604d2 | 596 | if(dx>1.e-9) return dq/dx; |
597 | else return 0.; | |
bcb6fb78 | 598 | } |
599 | ||
0b433f72 | 600 | //____________________________________________________________ |
601 | Float_t AliTRDseedV1::GetMomentum(Float_t *err) const | |
602 | { | |
603 | // Returns momentum of the track after update with the current tracklet as: | |
604 | // BEGIN_LATEX | |
605 | // p=#frac{1}{1/p_{t}} #sqrt{1+tgl^{2}} | |
606 | // END_LATEX | |
607 | // and optionally the momentum error (if err is not null). | |
608 | // The estimated variance of the momentum is given by: | |
609 | // BEGIN_LATEX | |
610 | // #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}) | |
611 | // END_LATEX | |
612 | // which can be simplified to | |
613 | // BEGIN_LATEX | |
614 | // #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} | |
615 | // END_LATEX | |
616 | // | |
617 | ||
618 | Double_t p = fPt*TMath::Sqrt(1.+fZref[1]*fZref[1]); | |
619 | Double_t p2 = p*p; | |
620 | Double_t tgl2 = fZref[1]*fZref[1]; | |
621 | Double_t pt2 = fPt*fPt; | |
622 | if(err){ | |
623 | Double_t s2 = | |
624 | p2*tgl2*pt2*pt2*fRefCov[4] | |
625 | -2.*p2*fZref[1]*fPt*pt2*fRefCov[5] | |
626 | +p2*pt2*fRefCov[6]; | |
627 | (*err) = TMath::Sqrt(s2); | |
628 | } | |
629 | return p; | |
630 | } | |
631 | ||
b453ef55 | 632 | //____________________________________________________________________ |
633 | Float_t AliTRDseedV1::GetOccupancyTB() const | |
634 | { | |
635 | // Returns procentage of TB occupied by clusters | |
636 | ||
637 | Int_t n(0); | |
638 | AliTRDcluster *c(NULL); | |
639 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ | |
640 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; | |
641 | n++; | |
642 | } | |
643 | ||
644 | return Float_t(n)/AliTRDtrackerV1::GetNTimeBins(); | |
645 | } | |
0b433f72 | 646 | |
0906e73e | 647 | //____________________________________________________________________ |
3e778975 | 648 | Float_t* AliTRDseedV1::GetProbability(Bool_t force) |
0906e73e | 649 | { |
3e778975 | 650 | if(!force) return &fProb[0]; |
4d6aee34 | 651 | if(!CookPID()) return NULL; |
3e778975 | 652 | return &fProb[0]; |
653 | } | |
654 | ||
655 | //____________________________________________________________ | |
656 | Bool_t AliTRDseedV1::CookPID() | |
657 | { | |
0906e73e | 658 | // Fill probability array for tracklet from the DB. |
659 | // | |
660 | // Parameters | |
661 | // | |
662 | // Output | |
4d6aee34 | 663 | // returns pointer to the probability array and NULL if missing DB access |
0906e73e | 664 | // |
2a3191bb | 665 | // Retrieve PID probabilities for e+-, mu+-, K+-, pi+- and p+- from the DB according to tracklet information: |
666 | // - estimated momentum at tracklet reference point | |
667 | // - dE/dx measurements | |
668 | // - tracklet length | |
669 | // - TRD layer | |
670 | // According to the steering settings specified in the reconstruction one of the following methods are used | |
671 | // - Neural Network [default] - option "nn" | |
672 | // - 2D Likelihood - option "!nn" | |
0906e73e | 673 | |
0906e73e | 674 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
675 | if (!calibration) { | |
676 | AliError("No access to calibration data"); | |
3e778975 | 677 | return kFALSE; |
0906e73e | 678 | } |
679 | ||
4d6aee34 | 680 | if (!fkReconstructor) { |
3a039a31 | 681 | AliError("Reconstructor not set."); |
3e778975 | 682 | return kFALSE; |
4ba1d6ae | 683 | } |
684 | ||
0906e73e | 685 | // Retrieve the CDB container class with the parametric detector response |
4d6aee34 | 686 | const AliTRDCalPID *pd = calibration->GetPIDObject(fkReconstructor->GetPIDMethod()); |
0906e73e | 687 | if (!pd) { |
688 | AliError("No access to AliTRDCalPID object"); | |
3e778975 | 689 | return kFALSE; |
0906e73e | 690 | } |
10f75631 | 691 | |
29b87567 | 692 | // calculate tracklet length TO DO |
560e5c05 | 693 | Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())/ TMath::Sqrt((1.0 - GetSnp()*GetSnp()) / (1.0 + GetTgl()*GetTgl())); |
0906e73e | 694 | |
695 | //calculate dE/dx | |
9ded305e | 696 | CookdEdx(AliTRDCalPID::kNSlicesNN); |
697 | 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 | 698 | |
0906e73e | 699 | // Sets the a priori probabilities |
11d80e40 | 700 | Bool_t kPIDNN(fkReconstructor->GetPIDMethod()==AliTRDpidUtil::kNN); |
f83cd814 | 701 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) |
11d80e40 | 702 | fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, kPIDNN?GetPlane():fkReconstructor->GetRecoParam()->GetPIDLQslices()); |
f301a656 | 703 | |
3e778975 | 704 | return kTRUE; |
0906e73e | 705 | } |
706 | ||
e4f2f73d | 707 | //____________________________________________________________________ |
708 | Float_t AliTRDseedV1::GetQuality(Bool_t kZcorr) const | |
709 | { | |
710 | // | |
711 | // Returns a quality measurement of the current seed | |
712 | // | |
713 | ||
dd8059a8 | 714 | Float_t zcorr = kZcorr ? GetTilt() * (fZfit[0] - fZref[0]) : 0.; |
29b87567 | 715 | return |
3e778975 | 716 | .5 * TMath::Abs(18.0 - GetN()) |
29b87567 | 717 | + 10.* TMath::Abs(fYfit[1] - fYref[1]) |
718 | + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr) | |
dd8059a8 | 719 | + 2. * TMath::Abs(fZfit[0] - fZref[0]) / GetPadLength(); |
e4f2f73d | 720 | } |
721 | ||
0906e73e | 722 | //____________________________________________________________________ |
d937ad7a | 723 | void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const |
0906e73e | 724 | { |
d937ad7a | 725 | // Computes covariance in the y-z plane at radial point x (in tracking coordinates) |
726 | // and returns the results in the preallocated array cov[3] as : | |
727 | // cov[0] = Var(y) | |
728 | // cov[1] = Cov(yz) | |
729 | // cov[2] = Var(z) | |
730 | // | |
731 | // Details | |
732 | // | |
733 | // For the linear transformation | |
734 | // BEGIN_LATEX | |
735 | // Y = T_{x} X^{T} | |
736 | // END_LATEX | |
737 | // The error propagation has the general form | |
738 | // BEGIN_LATEX | |
739 | // C_{Y} = T_{x} C_{X} T_{x}^{T} | |
740 | // END_LATEX | |
741 | // We apply this formula 2 times. First to calculate the covariance of the tracklet | |
742 | // at point x we consider: | |
743 | // BEGIN_LATEX | |
744 | // T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}} | |
745 | // END_LATEX | |
746 | // and secondly to take into account the tilt angle | |
747 | // BEGIN_LATEX | |
748 | // T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}} | |
749 | // END_LATEX | |
750 | // | |
751 | // using simple trigonometrics one can write for this last case | |
752 | // BEGIN_LATEX | |
753 | // 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})}} | |
754 | // END_LATEX | |
755 | // which can be aproximated for small alphas (2 deg) with | |
756 | // BEGIN_LATEX | |
757 | // 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}}} | |
758 | // END_LATEX | |
759 | // | |
760 | // before applying the tilt rotation we also apply systematic uncertainties to the tracklet | |
761 | // position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might | |
762 | // account for extra misalignment/miscalibration uncertainties. | |
763 | // | |
764 | // Author : | |
765 | // Alex Bercuci <A.Bercuci@gsi.de> | |
766 | // Date : Jan 8th 2009 | |
767 | // | |
b1957d3c | 768 | |
769 | ||
d937ad7a | 770 | Double_t xr = fX0-x; |
771 | Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2]; | |
b72f4eaf | 772 | Double_t sz2 = fS2Z; |
773 | //GetPadLength()*GetPadLength()/12.; | |
0906e73e | 774 | |
d937ad7a | 775 | // insert systematic uncertainties |
4d6aee34 | 776 | if(fkReconstructor){ |
bb2db46c | 777 | Double_t sys[15]; memset(sys, 0, 15*sizeof(Double_t)); |
4d6aee34 | 778 | fkReconstructor->GetRecoParam()->GetSysCovMatrix(sys); |
bb2db46c | 779 | sy2 += sys[0]; |
780 | sz2 += sys[1]; | |
781 | } | |
2eb10c34 | 782 | |
783 | // rotate covariance matrix if no RC | |
784 | if(!IsRowCross()){ | |
785 | Double_t t2 = GetTilt()*GetTilt(); | |
786 | Double_t correction = 1./(1. + t2); | |
787 | cov[0] = (sy2+t2*sz2)*correction; | |
788 | cov[1] = GetTilt()*(sz2 - sy2)*correction; | |
789 | cov[2] = (t2*sy2+sz2)*correction; | |
790 | } else { | |
791 | cov[0] = sy2; cov[1] = 0.; cov[2] = sy2; | |
792 | } | |
793 | ||
794 | 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 | 795 | } |
eb38ed55 | 796 | |
bb2db46c | 797 | //____________________________________________________________ |
66765e8e | 798 | Int_t AliTRDseedV1::GetCovSqrt(const Double_t * const c, Double_t *d) |
bb2db46c | 799 | { |
800 | // Helper function to calculate the square root of the covariance matrix. | |
801 | // The input matrix is stored in the vector c and the result in the vector d. | |
41b7c7b6 | 802 | // Both arrays have to be initialized by the user with at least 3 elements. Return negative in case of failure. |
bb2db46c | 803 | // |
ec3f0161 | 804 | // For calculating the square root of the symmetric matrix c |
805 | // the following relation is used: | |
bb2db46c | 806 | // BEGIN_LATEX |
ec3f0161 | 807 | // C^{1/2} = VD^{1/2}V^{-1} |
bb2db46c | 808 | // END_LATEX |
41b7c7b6 | 809 | // with V being the matrix with the n eigenvectors as columns. |
ec3f0161 | 810 | // In case C is symmetric the followings are true: |
811 | // - matrix D is diagonal with the diagonal given by the eigenvalues of C | |
41b7c7b6 | 812 | // - V = V^{-1} |
bb2db46c | 813 | // |
814 | // Author A.Bercuci <A.Bercuci@gsi.de> | |
815 | // Date Mar 19 2009 | |
816 | ||
66765e8e | 817 | const Double_t kZero(1.e-20); |
4d6aee34 | 818 | Double_t l[2], // eigenvalues |
819 | v[3]; // eigenvectors | |
bb2db46c | 820 | // the secular equation and its solution : |
821 | // (c[0]-L)(c[2]-L)-c[1]^2 = 0 | |
822 | // L^2 - L*Tr(c)+DET(c) = 0 | |
823 | // L12 = [Tr(c) +- sqrt(Tr(c)^2-4*DET(c))]/2 | |
4d6aee34 | 824 | Double_t tr = c[0]+c[2], // trace |
825 | det = c[0]*c[2]-c[1]*c[1]; // determinant | |
66765e8e | 826 | if(TMath::Abs(det)<kZero) return 1; |
4d6aee34 | 827 | Double_t dd = TMath::Sqrt(tr*tr - 4*det); |
66765e8e | 828 | l[0] = .5*(tr + dd*(c[0]>c[2]?-1.:1.)); |
829 | l[1] = .5*(tr + dd*(c[0]>c[2]?1.:-1.)); | |
830 | if(l[0]<kZero || l[1]<kZero) return 2; | |
41b7c7b6 | 831 | // the sym V matrix |
832 | // | v00 v10| | |
833 | // | v10 v11| | |
66765e8e | 834 | Double_t den = (l[0]-c[0])*(l[0]-c[0])+c[1]*c[1]; |
835 | if(den<kZero){ // almost diagonal | |
836 | v[0] = TMath::Sign(0., c[1]); | |
837 | v[1] = TMath::Sign(1., (l[0]-c[0])); | |
838 | v[2] = TMath::Sign(0., c[1]*(l[0]-c[0])*(l[1]-c[2])); | |
839 | } else { | |
840 | Double_t tmp = 1./TMath::Sqrt(den); | |
841 | v[0] = c[1]* tmp; | |
842 | v[1] = (l[0]-c[0])*tmp; | |
843 | if(TMath::Abs(l[1]-c[2])<kZero) v[2] = TMath::Sign(v[0]*(l[0]-c[0])/kZero, (l[1]-c[2])); | |
844 | else v[2] = v[0]*(l[0]-c[0])/(l[1]-c[2]); | |
845 | } | |
41b7c7b6 | 846 | // the VD^{1/2}V is: |
4d6aee34 | 847 | l[0] = TMath::Sqrt(l[0]); l[1] = TMath::Sqrt(l[1]); |
848 | d[0] = v[0]*v[0]*l[0]+v[1]*v[1]*l[1]; | |
849 | d[1] = v[0]*v[1]*l[0]+v[1]*v[2]*l[1]; | |
850 | d[2] = v[1]*v[1]*l[0]+v[2]*v[2]*l[1]; | |
bb2db46c | 851 | |
66765e8e | 852 | return 0; |
bb2db46c | 853 | } |
854 | ||
855 | //____________________________________________________________ | |
4d6aee34 | 856 | Double_t AliTRDseedV1::GetCovInv(const Double_t * const c, Double_t *d) |
bb2db46c | 857 | { |
858 | // Helper function to calculate the inverse of the covariance matrix. | |
859 | // The input matrix is stored in the vector c and the result in the vector d. | |
860 | // Both arrays have to be initialized by the user with at least 3 elements | |
861 | // The return value is the determinant or 0 in case of singularity. | |
862 | // | |
863 | // Author A.Bercuci <A.Bercuci@gsi.de> | |
864 | // Date Mar 19 2009 | |
865 | ||
4d6aee34 | 866 | Double_t det = c[0]*c[2] - c[1]*c[1]; |
867 | if(TMath::Abs(det)<1.e-20) return 0.; | |
868 | Double_t invDet = 1./det; | |
869 | d[0] = c[2]*invDet; | |
870 | d[1] =-c[1]*invDet; | |
871 | d[2] = c[0]*invDet; | |
872 | return det; | |
bb2db46c | 873 | } |
0906e73e | 874 | |
b72f4eaf | 875 | //____________________________________________________________________ |
876 | UShort_t AliTRDseedV1::GetVolumeId() const | |
877 | { | |
4ecadb52 | 878 | // Returns geometry volume id by delegation |
879 | ||
fbe11be7 | 880 | for(Int_t ic(0);ic<kNclusters; ic++){ |
881 | if(fClusters[ic]) return fClusters[ic]->GetVolumeId(); | |
882 | } | |
883 | return 0; | |
b72f4eaf | 884 | } |
885 | ||
886 | ||
d937ad7a | 887 | //____________________________________________________________________ |
e3cf3d02 | 888 | void AliTRDseedV1::Calibrate() |
d937ad7a | 889 | { |
e3cf3d02 | 890 | // Retrieve calibration and position parameters from OCDB. |
891 | // The following information are used | |
d937ad7a | 892 | // - detector index |
e3cf3d02 | 893 | // - column and row position of first attached cluster. If no clusters are attached |
894 | // to the tracklet a random central chamber position (c=70, r=7) will be used. | |
895 | // | |
896 | // The following information is cached in the tracklet | |
897 | // t0 (trigger delay) | |
898 | // drift velocity | |
899 | // PRF width | |
900 | // omega*tau = tg(a_L) | |
901 | // diffusion coefficients (longitudinal and transversal) | |
d937ad7a | 902 | // |
903 | // Author : | |
904 | // Alex Bercuci <A.Bercuci@gsi.de> | |
905 | // Date : Jan 8th 2009 | |
906 | // | |
eb38ed55 | 907 | |
d937ad7a | 908 | AliCDBManager *cdb = AliCDBManager::Instance(); |
909 | if(cdb->GetRun() < 0){ | |
910 | AliError("OCDB manager not properly initialized"); | |
911 | return; | |
912 | } | |
0906e73e | 913 | |
e3cf3d02 | 914 | AliTRDcalibDB *calib = AliTRDcalibDB::Instance(); |
915 | AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet), | |
916 | *t0ROC = calib->GetT0ROC(fDet);; | |
917 | const AliTRDCalDet *vdDet = calib->GetVdriftDet(); | |
918 | const AliTRDCalDet *t0Det = calib->GetT0Det(); | |
d937ad7a | 919 | |
920 | Int_t col = 70, row = 7; | |
921 | AliTRDcluster **c = &fClusters[0]; | |
3e778975 | 922 | if(GetN()){ |
d937ad7a | 923 | Int_t ic = 0; |
8d2bec9e | 924 | while (ic<kNclusters && !(*c)){ic++; c++;} |
d937ad7a | 925 | if(*c){ |
926 | col = (*c)->GetPadCol(); | |
927 | row = (*c)->GetPadRow(); | |
928 | } | |
929 | } | |
3a039a31 | 930 | |
e17f4785 | 931 | fT0 = (t0Det->GetValue(fDet) + t0ROC->GetValue(col,row)) / AliTRDCommonParam::Instance()->GetSamplingFrequency(); |
e3cf3d02 | 932 | fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row); |
933 | fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF; | |
934 | fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD); | |
935 | AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL, | |
936 | fDiffT, fVD); | |
903326c1 | 937 | 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)); |
938 | ||
939 | ||
e3cf3d02 | 940 | SetBit(kCalib, kTRUE); |
0906e73e | 941 | } |
942 | ||
0906e73e | 943 | //____________________________________________________________________ |
29b87567 | 944 | void AliTRDseedV1::SetOwner() |
0906e73e | 945 | { |
29b87567 | 946 | //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO")); |
947 | ||
948 | if(TestBit(kOwner)) return; | |
8d2bec9e | 949 | for(int ic=0; ic<kNclusters; ic++){ |
29b87567 | 950 | if(!fClusters[ic]) continue; |
951 | fClusters[ic] = new AliTRDcluster(*fClusters[ic]); | |
952 | } | |
953 | SetBit(kOwner); | |
0906e73e | 954 | } |
955 | ||
eb2b4f91 | 956 | //____________________________________________________________ |
4ecadb52 | 957 | void AliTRDseedV1::SetPadPlane(AliTRDpadPlane * const p) |
eb2b4f91 | 958 | { |
959 | // Shortcut method to initialize pad geometry. | |
2eb10c34 | 960 | fPad[0] = p->GetLengthIPad(); |
961 | fPad[1] = p->GetWidthIPad(); | |
962 | fPad[2] = TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle()); | |
963 | fPad[3] = p->GetRow0() + p->GetAnodeWireOffset(); | |
eb2b4f91 | 964 | } |
965 | ||
966 | ||
e4f2f73d | 967 | //____________________________________________________________________ |
4d6aee34 | 968 | Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt) |
e4f2f73d | 969 | { |
1fd9389f | 970 | // |
971 | // Projective algorithm to attach clusters to seeding tracklets. The following steps are performed : | |
972 | // 1. Collapse x coordinate for the full detector plane | |
973 | // 2. truncated mean on y (r-phi) direction | |
974 | // 3. purge clusters | |
975 | // 4. truncated mean on z direction | |
976 | // 5. purge clusters | |
977 | // | |
978 | // Parameters | |
979 | // - chamber : pointer to tracking chamber container used to search the tracklet | |
980 | // - tilt : switch for tilt correction during road building [default true] | |
981 | // Output | |
982 | // - true : if tracklet found successfully. Failure can happend because of the following: | |
983 | // - | |
984 | // Detailed description | |
985 | // | |
986 | // We start up by defining the track direction in the xy plane and roads. The roads are calculated based | |
8a7ff53c | 987 | // on tracking information (variance in the r-phi direction) and estimated variance of the standard |
988 | // clusters (see AliTRDcluster::SetSigmaY2()) corrected for tilt (see GetCovAt()). From this the road is | |
989 | // BEGIN_LATEX | |
500851ab | 990 | // 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 | 991 | // r_{z} = 1.5*L_{pad} |
992 | // END_LATEX | |
1fd9389f | 993 | // |
4b755889 | 994 | // Author : Alexandru Bercuci <A.Bercuci@gsi.de> |
995 | // Debug : level >3 | |
1fd9389f | 996 | |
fc0882f3 | 997 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it |
998 | ||
999 | if(!recoParam){ | |
560e5c05 | 1000 | AliError("Tracklets can not be used without a valid RecoParam."); |
29b87567 | 1001 | return kFALSE; |
1002 | } | |
b1957d3c | 1003 | // Initialize reco params for this tracklet |
1004 | // 1. first time bin in the drift region | |
a2abcbc5 | 1005 | Int_t t0 = 14; |
fc0882f3 | 1006 | Int_t kClmin = Int_t(recoParam->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins()); |
29b87567 | 1007 | |
fc0882f3 | 1008 | Double_t sysCov[5]; recoParam->GetSysCovMatrix(sysCov); |
8a7ff53c | 1009 | Double_t s2yTrk= fRefCov[0], |
1010 | s2yCl = 0., | |
1011 | s2zCl = GetPadLength()*GetPadLength()/12., | |
1012 | syRef = TMath::Sqrt(s2yTrk), | |
1013 | t2 = GetTilt()*GetTilt(); | |
29b87567 | 1014 | //define roads |
fc0882f3 | 1015 | Double_t kroady = 1., //recoParam->GetRoad1y(); |
1016 | kroadz = GetPadLength() * recoParam->GetRoadzMultiplicator() + 1.; | |
8a7ff53c | 1017 | // define probing cluster (the perfect cluster) and default calibration |
1018 | Short_t sig[] = {0, 0, 10, 30, 10, 0,0}; | |
1019 | AliTRDcluster cp(fDet, 6, 75, 0, sig, 0); | |
560e5c05 | 1020 | if(fkReconstructor->IsHLT()) cp.SetRPhiMethod(AliTRDcluster::kCOG); |
1021 | if(!IsCalibrated()) Calibrate(); | |
8a7ff53c | 1022 | |
ee8fb199 | 1023 | AliDebug(4, ""); |
1024 | AliDebug(4, Form("syKalman[%f] rY[%f] rZ[%f]", syRef, kroady, kroadz)); | |
29b87567 | 1025 | |
1026 | // working variables | |
b1957d3c | 1027 | const Int_t kNrows = 16; |
4b755889 | 1028 | const Int_t kNcls = 3*kNclusters; // buffer size |
1029 | AliTRDcluster *clst[kNrows][kNcls]; | |
3044dfe5 | 1030 | Bool_t blst[kNrows][kNcls]; |
4b755889 | 1031 | Double_t cond[4], dx, dy, yt, zt, yres[kNrows][kNcls]; |
1032 | Int_t idxs[kNrows][kNcls], ncl[kNrows], ncls = 0; | |
b1957d3c | 1033 | memset(ncl, 0, kNrows*sizeof(Int_t)); |
4b755889 | 1034 | memset(yres, 0, kNrows*kNcls*sizeof(Double_t)); |
3044dfe5 | 1035 | memset(blst, 0, kNrows*kNcls*sizeof(Bool_t)); //this is 8 times faster to memset than "memset(clst, 0, kNrows*kNcls*sizeof(AliTRDcluster*))" |
b1957d3c | 1036 | |
29b87567 | 1037 | // Do cluster projection |
4d6aee34 | 1038 | AliTRDcluster *c = NULL; |
1039 | AliTRDchamberTimeBin *layer = NULL; | |
b1957d3c | 1040 | Bool_t kBUFFER = kFALSE; |
4b755889 | 1041 | for (Int_t it = 0; it < kNtb; it++) { |
b1957d3c | 1042 | if(!(layer = chamber->GetTB(it))) continue; |
29b87567 | 1043 | if(!Int_t(*layer)) continue; |
8a7ff53c | 1044 | // get track projection at layers position |
b1957d3c | 1045 | dx = fX0 - layer->GetX(); |
1046 | yt = fYref[0] - fYref[1] * dx; | |
1047 | zt = fZref[0] - fZref[1] * dx; | |
8a7ff53c | 1048 | // get standard cluster error corrected for tilt |
1049 | cp.SetLocalTimeBin(it); | |
1050 | cp.SetSigmaY2(0.02, fDiffT, fExB, dx, -1./*zt*/, fYref[1]); | |
d956a643 | 1051 | s2yCl = (cp.GetSigmaY2() + sysCov[0] + t2*s2zCl)/(1.+t2); |
8a7ff53c | 1052 | // get estimated road |
1053 | kroady = 3.*TMath::Sqrt(12.*(s2yTrk + s2yCl)); | |
1054 | ||
ee8fb199 | 1055 | AliDebug(5, Form(" %2d x[%f] yt[%f] zt[%f]", it, dx, yt, zt)); |
1056 | ||
1057 | AliDebug(5, Form(" syTrk[um]=%6.2f syCl[um]=%6.2f syClTlt[um]=%6.2f Ry[mm]=%f", 1.e4*TMath::Sqrt(s2yTrk), 1.e4*TMath::Sqrt(cp.GetSigmaY2()), 1.e4*TMath::Sqrt(s2yCl), 1.e1*kroady)); | |
b1957d3c | 1058 | |
8a7ff53c | 1059 | // select clusters |
b1957d3c | 1060 | cond[0] = yt; cond[2] = kroady; |
1061 | cond[1] = zt; cond[3] = kroadz; | |
1062 | Int_t n=0, idx[6]; | |
1063 | layer->GetClusters(cond, idx, n, 6); | |
1064 | for(Int_t ic = n; ic--;){ | |
1065 | c = (*layer)[idx[ic]]; | |
1066 | dy = yt - c->GetY(); | |
dd8059a8 | 1067 | dy += tilt ? GetTilt() * (c->GetZ() - zt) : 0.; |
b1957d3c | 1068 | // select clusters on a 3 sigmaKalman level |
1069 | /* if(tilt && TMath::Abs(dy) > 3.*syRef){ | |
1070 | printf("too large !!!\n"); | |
1071 | continue; | |
1072 | }*/ | |
1073 | Int_t r = c->GetPadRow(); | |
ee8fb199 | 1074 | AliDebug(5, Form(" -> dy[%f] yc[%f] r[%d]", TMath::Abs(dy), c->GetY(), r)); |
b1957d3c | 1075 | clst[r][ncl[r]] = c; |
3044dfe5 | 1076 | blst[r][ncl[r]] = kTRUE; |
b1957d3c | 1077 | idxs[r][ncl[r]] = idx[ic]; |
1078 | yres[r][ncl[r]] = dy; | |
1079 | ncl[r]++; ncls++; | |
1080 | ||
4b755889 | 1081 | if(ncl[r] >= kNcls) { |
560e5c05 | 1082 | AliWarning(Form("Cluster candidates row[%d] reached buffer limit[%d]. Some may be lost.", r, kNcls)); |
b1957d3c | 1083 | kBUFFER = kTRUE; |
29b87567 | 1084 | break; |
1085 | } | |
1086 | } | |
b1957d3c | 1087 | if(kBUFFER) break; |
29b87567 | 1088 | } |
ee8fb199 | 1089 | AliDebug(4, Form("Found %d clusters. Processing ...", ncls)); |
1090 | if(ncls<kClmin){ | |
560e5c05 | 1091 | AliDebug(1, Form("CLUSTERS FOUND %d LESS THAN THRESHOLD %d.", ncls, kClmin)); |
7c3eecb8 | 1092 | SetErrorMsg(kAttachClFound); |
ee8fb199 | 1093 | return kFALSE; |
1094 | } | |
1095 | ||
b1957d3c | 1096 | // analyze each row individualy |
560e5c05 | 1097 | Bool_t kRowSelection(kFALSE); |
1098 | Double_t mean[]={1.e3, 1.e3, 1.3}, syDis[]={1.e3, 1.e3, 1.3}; | |
1099 | Int_t nrow[] = {0, 0, 0}, rowId[] = {-1, -1, -1}, nr = 0, lr=-1; | |
1100 | TVectorD vdy[3]; | |
1101 | for(Int_t ir=0; ir<kNrows; ir++){ | |
b1957d3c | 1102 | if(!(ncl[ir])) continue; |
560e5c05 | 1103 | if(lr>0 && ir-lr != 1){ |
1104 | AliDebug(2, "Rows attached not continuous. Turn on selection."); | |
1105 | kRowSelection=kTRUE; | |
29b87567 | 1106 | } |
560e5c05 | 1107 | |
ee8fb199 | 1108 | AliDebug(5, Form(" r[%d] n[%d]", ir, ncl[ir])); |
b1957d3c | 1109 | // Evaluate truncated mean on the y direction |
560e5c05 | 1110 | if(ncl[ir] < 4) continue; |
1111 | AliMathBase::EvaluateUni(ncl[ir], yres[ir], mean[nr], syDis[nr], Int_t(ncl[ir]*.8)); | |
4b755889 | 1112 | |
b1957d3c | 1113 | // TODO check mean and sigma agains cluster resolution !! |
560e5c05 | 1114 | AliDebug(4, Form(" m_%d[%+5.3f (%5.3fs)] s[%f]", nr, mean[nr], TMath::Abs(mean[nr]/syDis[nr]), syDis[nr])); |
1115 | // remove outliers based on a 3 sigmaDistr level | |
b1957d3c | 1116 | Bool_t kFOUND = kFALSE; |
1117 | for(Int_t ic = ncl[ir]; ic--;){ | |
560e5c05 | 1118 | if(yres[ir][ic] - mean[nr] > 3. * syDis[nr]){ |
3044dfe5 | 1119 | blst[ir][ic] = kFALSE; continue; |
b1957d3c | 1120 | } |
560e5c05 | 1121 | nrow[nr]++; rowId[nr]=ir; kFOUND = kTRUE; |
1122 | } | |
1123 | if(kFOUND){ | |
1124 | vdy[nr].Use(nrow[nr], yres[ir]); | |
1125 | nr++; | |
b1957d3c | 1126 | } |
b1957d3c | 1127 | lr = ir; if(nr>=3) break; |
29b87567 | 1128 | } |
fc0882f3 | 1129 | if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()){ |
560e5c05 | 1130 | TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
1131 | UChar_t stat(0); | |
1132 | if(IsKink()) SETBIT(stat, 1); | |
1133 | if(IsStandAlone()) SETBIT(stat, 2); | |
1134 | cstreamer << "AttachClusters" | |
1135 | << "stat=" << stat | |
1136 | << "det=" << fDet | |
1137 | << "pt=" << fPt | |
1138 | << "s2y=" << s2yTrk | |
1139 | << "r0=" << rowId[0] | |
1140 | << "dy0=" << &vdy[0] | |
1141 | << "m0=" << mean[0] | |
1142 | << "s0=" << syDis[0] | |
1143 | << "r1=" << rowId[1] | |
1144 | << "dy1=" << &vdy[1] | |
1145 | << "m1=" << mean[1] | |
1146 | << "s1=" << syDis[1] | |
1147 | << "r2=" << rowId[2] | |
1148 | << "dy2=" << &vdy[2] | |
1149 | << "m2=" << mean[2] | |
1150 | << "s2=" << syDis[2] | |
1151 | << "\n"; | |
1152 | } | |
1153 | ||
1154 | ||
1155 | // analyze gap in rows attached | |
1156 | if(kRowSelection){ | |
1157 | SetErrorMsg(kAttachRowGap); | |
1158 | Int_t rowRemove(-1); | |
1159 | if(nr==2){ // select based on minimum distance to track projection | |
1160 | if(TMath::Abs(mean[0])<TMath::Abs(mean[1])){ | |
1161 | if(nrow[1]>nrow[0]) AliDebug(2, Form("Conflicting mean[%f < %f] but ncl[%d < %d].", TMath::Abs(mean[0]), TMath::Abs(mean[1]), nrow[0], nrow[1])); | |
1162 | }else{ | |
1163 | if(nrow[1]<nrow[0]) AliDebug(2, Form("Conflicting mean[%f > %f] but ncl[%d > %d].", TMath::Abs(mean[0]), TMath::Abs(mean[1]), nrow[0], nrow[1])); | |
1164 | Swap(nrow[0],nrow[1]); Swap(rowId[0],rowId[1]); | |
1165 | Swap(mean[0],mean[1]); Swap(syDis[0],syDis[1]); | |
1166 | } | |
1167 | rowRemove=1; nr=1; | |
1168 | } else if(nr==3){ // select based on 2 consecutive rows | |
1169 | if(rowId[1]==rowId[0]+1 && rowId[1]!=rowId[2]-1){ | |
1170 | nr=2;rowRemove=2; | |
1171 | } else if(rowId[1]!=rowId[0]+1 && rowId[1]==rowId[2]-1){ | |
1172 | Swap(nrow[0],nrow[2]); Swap(rowId[0],rowId[2]); | |
1173 | Swap(mean[0],mean[2]); Swap(syDis[0],syDis[2]); | |
1174 | nr=2; rowRemove=2; | |
1175 | } | |
29b87567 | 1176 | } |
560e5c05 | 1177 | if(rowRemove>0){nrow[rowRemove]=0; rowId[rowRemove]=-1;} |
29b87567 | 1178 | } |
560e5c05 | 1179 | AliDebug(4, Form(" Ncl[%d[%d] + %d[%d] + %d[%d]]", nrow[0], rowId[0], nrow[1], rowId[1], nrow[2], rowId[2])); |
1180 | ||
1181 | if(nr==3){ | |
1182 | SetBit(kRowCross, kTRUE); // mark pad row crossing | |
7c3eecb8 | 1183 | SetErrorMsg(kAttachRow); |
560e5c05 | 1184 | const Float_t am[]={TMath::Abs(mean[0]), TMath::Abs(mean[1]), TMath::Abs(mean[2])}; |
1185 | AliDebug(4, Form("complex row configuration\n" | |
1186 | " r[%d] n[%d] m[%6.3f] s[%6.3f]\n" | |
1187 | " r[%d] n[%d] m[%6.3f] s[%6.3f]\n" | |
1188 | " r[%d] n[%d] m[%6.3f] s[%6.3f]\n" | |
1189 | , rowId[0], nrow[0], am[0], syDis[0] | |
1190 | , rowId[1], nrow[1], am[1], syDis[1] | |
1191 | , rowId[2], nrow[2], am[2], syDis[2])); | |
1192 | Int_t id[]={0,1,2}; TMath::Sort(3, am, id, kFALSE); | |
1193 | // backup | |
1194 | Int_t rnn[3]; memcpy(rnn, nrow, 3*sizeof(Int_t)); | |
1195 | Int_t rid[3]; memcpy(rid, rowId, 3*sizeof(Int_t)); | |
1196 | Double_t rm[3]; memcpy(rm, mean, 3*sizeof(Double_t)); | |
1197 | Double_t rs[3]; memcpy(rs, syDis, 3*sizeof(Double_t)); | |
1198 | nrow[0]=rnn[id[0]]; rowId[0]=rid[id[0]]; mean[0]=rm[id[0]]; syDis[0]=rs[id[0]]; | |
1199 | nrow[1]=rnn[id[1]]; rowId[1]=rid[id[1]]; mean[1]=rm[id[1]]; syDis[1]=rs[id[1]]; | |
1200 | nrow[2]=0; rowId[2]=-1; mean[2] = 1.e3; syDis[2] = 1.e3; | |
1201 | AliDebug(4, Form("solved configuration\n" | |
1202 | " r[%d] n[%d] m[%+6.3f] s[%6.3f]\n" | |
1203 | " r[%d] n[%d] m[%+6.3f] s[%6.3f]\n" | |
1204 | " r[%d] n[%d] m[%+6.3f] s[%6.3f]\n" | |
1205 | , rowId[0], nrow[0], mean[0], syDis[0] | |
1206 | , rowId[1], nrow[1], mean[1], syDis[1] | |
1207 | , rowId[2], nrow[2], mean[2], syDis[2])); | |
1208 | nr=2; | |
1209 | } else if(nr==2) { | |
1210 | SetBit(kRowCross, kTRUE); // mark pad row crossing | |
1211 | if(nrow[1] > nrow[0]){ // swap row order | |
1212 | Swap(nrow[0],nrow[1]); Swap(rowId[0],rowId[1]); | |
1213 | Swap(mean[0],mean[1]); Swap(syDis[0],syDis[1]); | |
1214 | } | |
ee8fb199 | 1215 | } |
560e5c05 | 1216 | |
b1957d3c | 1217 | // Select and store clusters |
1218 | // We should consider here : | |
1219 | // 1. How far is the chamber boundary | |
1220 | // 2. How big is the mean | |
560e5c05 | 1221 | Int_t n(0); Float_t dyc[kNclusters]; memset(dyc,0,kNclusters*sizeof(Float_t)); |
b1957d3c | 1222 | for (Int_t ir = 0; ir < nr; ir++) { |
560e5c05 | 1223 | Int_t jr(rowId[ir]); |
1224 | AliDebug(4, Form(" Attaching Ncl[%d]=%d ...", jr, ncl[jr])); | |
b1957d3c | 1225 | for (Int_t ic = 0; ic < ncl[jr]; ic++) { |
3044dfe5 | 1226 | if(!blst[jr][ic])continue; |
1227 | c = clst[jr][ic]; | |
560e5c05 | 1228 | Int_t it(c->GetPadTime()); |
1229 | Int_t idx(it+kNtb*ir); | |
6ad5e6b2 | 1230 | if(fClusters[idx]){ |
560e5c05 | 1231 | AliDebug(4, Form("Many cluster candidates on row[%2d] tb[%2d].", jr, it)); |
1232 | // TODO should save also the information on where the multiplicity happened and its size | |
6ad5e6b2 | 1233 | SetErrorMsg(kAttachMultipleCl); |
560e5c05 | 1234 | // TODO should also compare with mean and sigma for this row |
1235 | if(yres[jr][ic] > dyc[idx]) continue; | |
6ad5e6b2 | 1236 | } |
1237 | ||
b1957d3c | 1238 | // TODO proper indexing of clusters !! |
6ad5e6b2 | 1239 | fIndexes[idx] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]); |
1240 | fClusters[idx] = c; | |
560e5c05 | 1241 | dyc[idx] = yres[jr][ic]; |
3e778975 | 1242 | n++; |
b1957d3c | 1243 | } |
560e5c05 | 1244 | } |
6ad5e6b2 | 1245 | SetN(n); |
b1957d3c | 1246 | |
29b87567 | 1247 | // number of minimum numbers of clusters expected for the tracklet |
6ad5e6b2 | 1248 | if (GetN() < kClmin){ |
560e5c05 | 1249 | AliDebug(1, Form("NOT ENOUGH CLUSTERS %d ATTACHED TO THE TRACKLET [min %d] FROM FOUND %d.", GetN(), kClmin, n)); |
7c3eecb8 | 1250 | SetErrorMsg(kAttachClAttach); |
e4f2f73d | 1251 | return kFALSE; |
1252 | } | |
0906e73e | 1253 | |
e3cf3d02 | 1254 | // Load calibration parameters for this tracklet |
1255 | Calibrate(); | |
b1957d3c | 1256 | |
1257 | // calculate dx for time bins in the drift region (calibration aware) | |
a2abcbc5 | 1258 | Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0}; |
1259 | for (Int_t it = t0, irp=0; irp<2 && it < AliTRDtrackerV1::GetNTimeBins(); it++) { | |
b1957d3c | 1260 | if(!fClusters[it]) continue; |
1261 | x[irp] = fClusters[it]->GetX(); | |
a2abcbc5 | 1262 | tb[irp] = fClusters[it]->GetLocalTimeBin(); |
b1957d3c | 1263 | irp++; |
e3cf3d02 | 1264 | } |
d86ed84c | 1265 | Int_t dtb = tb[1] - tb[0]; |
1266 | fdX = dtb ? (x[0] - x[1]) / dtb : 0.15; | |
29b87567 | 1267 | return kTRUE; |
e4f2f73d | 1268 | } |
1269 | ||
03cef9b2 | 1270 | //____________________________________________________________ |
1271 | void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec) | |
1272 | { | |
1273 | // Fill in all derived information. It has to be called after recovery from file or HLT. | |
1274 | // The primitive data are | |
1275 | // - list of clusters | |
1276 | // - detector (as the detector will be removed from clusters) | |
1277 | // - position of anode wire (fX0) - temporary | |
1278 | // - track reference position and direction | |
1279 | // - momentum of the track | |
1280 | // - time bin length [cm] | |
1281 | // | |
1282 | // A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008 | |
1283 | // | |
4d6aee34 | 1284 | fkReconstructor = rec; |
03cef9b2 | 1285 | AliTRDgeometry g; |
2eb10c34 | 1286 | SetPadPlane(g.GetPadPlane(fDet)); |
1287 | ||
e3cf3d02 | 1288 | //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]); |
1289 | //fTgl = fZref[1]; | |
3e778975 | 1290 | Int_t n = 0, nshare = 0, nused = 0; |
03cef9b2 | 1291 | AliTRDcluster **cit = &fClusters[0]; |
8d2bec9e | 1292 | for(Int_t ic = kNclusters; ic--; cit++){ |
03cef9b2 | 1293 | if(!(*cit)) return; |
3e778975 | 1294 | n++; |
1295 | if((*cit)->IsShared()) nshare++; | |
1296 | if((*cit)->IsUsed()) nused++; | |
03cef9b2 | 1297 | } |
3e778975 | 1298 | SetN(n); SetNUsed(nused); SetNShared(nshare); |
e3cf3d02 | 1299 | Fit(); |
03cef9b2 | 1300 | CookLabels(); |
1301 | GetProbability(); | |
1302 | } | |
1303 | ||
1304 | ||
e4f2f73d | 1305 | //____________________________________________________________________ |
2eb10c34 | 1306 | Bool_t AliTRDseedV1::Fit(UChar_t opt) |
e4f2f73d | 1307 | { |
16cca13f | 1308 | // |
1309 | // Linear fit of the clusters attached to the tracklet | |
1310 | // | |
1311 | // Parameters : | |
2eb10c34 | 1312 | // - opt : switch for tilt pad correction of cluster y position. Options are |
1313 | // 0 no correction [default] | |
1314 | // 1 full tilt correction [dz/dx and z0] | |
1315 | // 2 pseudo tilt correction [dz/dx from pad-chamber geometry] | |
1316 | // | |
16cca13f | 1317 | // Output : |
1318 | // True if successful | |
1319 | // | |
1320 | // Detailed description | |
1321 | // | |
1322 | // Fit in the xy plane | |
1323 | // | |
1fd9389f | 1324 | // The fit is performed to estimate the y position of the tracklet and the track |
1325 | // angle in the bending plane. The clusters are represented in the chamber coordinate | |
1326 | // system (with respect to the anode wire - see AliTRDtrackerV1::FollowBackProlongation() | |
1327 | // on how this is set). The x and y position of the cluster and also their variances | |
1328 | // are known from clusterizer level (see AliTRDcluster::GetXloc(), AliTRDcluster::GetYloc(), | |
1329 | // AliTRDcluster::GetSX() and AliTRDcluster::GetSY()). | |
1330 | // If gaussian approximation is used to calculate y coordinate of the cluster the position | |
1331 | // is recalculated taking into account the track angle. The general formula to calculate the | |
1332 | // error of cluster position in the gaussian approximation taking into account diffusion and track | |
1333 | // inclination is given for TRD by: | |
1334 | // BEGIN_LATEX | |
1335 | // #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} | |
1336 | // END_LATEX | |
1337 | // | |
1338 | // Since errors are calculated only in the y directions, radial errors (x direction) are mapped to y | |
1339 | // by projection i.e. | |
1340 | // BEGIN_LATEX | |
1341 | // #sigma_{x|y} = tg(#phi) #sigma_{x} | |
1342 | // END_LATEX | |
1343 | // and also by the lorentz angle correction | |
1344 | // | |
1345 | // Fit in the xz plane | |
1346 | // | |
1347 | // The "fit" is performed to estimate the radial position (x direction) where pad row cross happens. | |
1348 | // If no pad row crossing the z position is taken from geometry and radial position is taken from the xy | |
1349 | // fit (see below). | |
1350 | // | |
1351 | // There are two methods to estimate the radial position of the pad row cross: | |
1352 | // 1. leading cluster radial position : Here the lower part of the tracklet is considered and the last | |
1353 | // cluster registered (at radial x0) on this segment is chosen to mark the pad row crossing. The error | |
1354 | // of the z estimate is given by : | |
1355 | // BEGIN_LATEX | |
1356 | // #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12 | |
1357 | // END_LATEX | |
1358 | // The systematic errors for this estimation are generated by the following sources: | |
1359 | // - no charge sharing between pad rows is considered (sharp cross) | |
1360 | // - missing cluster at row cross (noise peak-up, under-threshold signal etc.). | |
1361 | // | |
1362 | // 2. charge fit over the crossing point : Here the full energy deposit along the tracklet is considered | |
1363 | // to estimate the position of the crossing by a fit in the qx plane. The errors in the q directions are | |
1364 | // parameterized as s_q = q^2. The systematic errors for this estimation are generated by the following sources: | |
1365 | // - no general model for the qx dependence | |
1366 | // - physical fluctuations of the charge deposit | |
1367 | // - gain calibration dependence | |
1368 | // | |
1369 | // Estimation of the radial position of the tracklet | |
16cca13f | 1370 | // |
1fd9389f | 1371 | // For pad row cross the radial position is taken from the xz fit (see above). Otherwise it is taken as the |
1372 | // interpolation point of the tracklet i.e. the point where the error in y of the fit is minimum. The error | |
1373 | // in the y direction of the tracklet is (see AliTRDseedV1::GetCovAt()): | |
1374 | // BEGIN_LATEX | |
1375 | // #sigma_{y} = #sigma^{2}_{y_{0}} + 2xcov(y_{0}, dy/dx) + #sigma^{2}_{dy/dx} | |
1376 | // END_LATEX | |
1377 | // and thus the radial position is: | |
1378 | // BEGIN_LATEX | |
1379 | // x = - cov(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} | |
1380 | // END_LATEX | |
1381 | // | |
1382 | // Estimation of tracklet position error | |
1383 | // | |
1384 | // The error in y direction is the error of the linear fit at the radial position of the tracklet while in the z | |
1385 | // direction is given by the cluster error or pad row cross error. In case of no pad row cross this is given by: | |
1386 | // BEGIN_LATEX | |
1387 | // #sigma_{y} = #sigma^{2}_{y_{0}} - 2cov^{2}(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} + #sigma^{2}_{dy/dx} | |
1388 | // #sigma_{z} = Pad_{length}/12 | |
1389 | // END_LATEX | |
1390 | // For pad row cross the full error is calculated at the radial position of the crossing (see above) and the error | |
1391 | // in z by the width of the crossing region - being a matter of parameterization. | |
1392 | // BEGIN_LATEX | |
1393 | // #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12 | |
1394 | // END_LATEX | |
1395 | // In case of no tilt correction (default in the barrel tracking) the tilt is taken into account by the rotation of | |
1396 | // the covariance matrix. See AliTRDseedV1::GetCovAt() for details. | |
1397 | // | |
1398 | // Author | |
1399 | // A.Bercuci <A.Bercuci@gsi.de> | |
e4f2f73d | 1400 | |
a723055f | 1401 | if(!fkReconstructor){ |
1402 | AliError("The tracklet needs the reconstruction setup. Please initialize by SetReconstructor()."); | |
1403 | return kFALSE; | |
1404 | } | |
b72f4eaf | 1405 | if(!IsCalibrated()) Calibrate(); |
2eb10c34 | 1406 | if(opt>2){ |
7e5954f0 | 1407 | AliWarning(Form("Option [%d] outside range [0, 2]. Using default",opt)); |
2eb10c34 | 1408 | opt=0; |
1409 | } | |
e3cf3d02 | 1410 | |
29b87567 | 1411 | const Int_t kClmin = 8; |
2eb10c34 | 1412 | const Float_t kScalePulls = 10.; // factor to scale y pulls - NOT UNDERSTOOD |
2f7d6ac8 | 1413 | // get track direction |
1414 | Double_t y0 = fYref[0]; | |
1415 | Double_t dydx = fYref[1]; | |
1416 | Double_t z0 = fZref[0]; | |
1417 | Double_t dzdx = fZref[1]; | |
ae4e8b84 | 1418 | |
5f1ae1e7 | 1419 | AliTRDtrackerV1::AliTRDLeastSquare fitterY; |
1420 | AliTRDtrackerV1::AliTRDLeastSquare fitterZ; | |
f301a656 | 1421 | |
29b87567 | 1422 | // book cluster information |
8d2bec9e | 1423 | Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters]; |
e3cf3d02 | 1424 | |
2eb10c34 | 1425 | Bool_t tilt(opt==1) // full tilt correction |
1426 | ,pseudo(opt==2) // pseudo tilt correction | |
1427 | ,rc(IsRowCross()) // row cross candidate | |
1428 | ,kDZDX(IsPrimary());// switch dzdx calculation for barrel primary tracks | |
1429 | Int_t n(0); // clusters used in fit | |
1430 | AliTRDcluster *c(NULL), *cc(NULL), **jc = &fClusters[0]; | |
fc0882f3 | 1431 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it |
2eb10c34 | 1432 | |
1433 | const Char_t *tcName[]={"NONE", "FULL", "HALF"}; | |
1434 | AliDebug(2, Form("Options : TC[%s] dzdx[%c]", tcName[opt], kDZDX?'Y':'N')); | |
1435 | ||
1436 | for (Int_t ic=0; ic<kNclusters; ic++, ++jc) { | |
1437 | xc[ic] = -1.; yc[ic] = 999.; zc[ic] = 999.; sy[ic] = 0.; | |
9eb2d46c | 1438 | if(!(c = (*jc))) continue; |
29b87567 | 1439 | if(!c->IsInChamber()) continue; |
2eb10c34 | 1440 | // compute pseudo tilt correction |
1441 | if(kDZDX){ | |
1442 | fZfit[0] = c->GetZ(); | |
1443 | if(rc){ | |
1444 | for(Int_t kc=AliTRDseedV1::kNtb; kc<AliTRDseedV1::kNclusters; kc++){ | |
1445 | if(!(cc=fClusters[kc])) continue; | |
1446 | if(!cc->IsInChamber()) continue; | |
1447 | fZfit[0] += cc->GetZ(); fZfit[0] *= 0.5; | |
1448 | break; | |
1449 | } | |
1450 | } | |
1451 | fZfit[1] = fZfit[0]/fX0; | |
1452 | if(rc){ | |
1453 | fZfit[0] += fZfit[1]*0.5*AliTRDgeometry::CdrHght(); | |
1454 | fZfit[1] = fZfit[0]/fX0; | |
1455 | } | |
1456 | kDZDX=kFALSE; | |
1457 | } | |
9462866a | 1458 | |
29b87567 | 1459 | Float_t w = 1.; |
1460 | if(c->GetNPads()>4) w = .5; | |
1461 | if(c->GetNPads()>5) w = .2; | |
010d62b0 | 1462 | |
1fd9389f | 1463 | // cluster charge |
dd8059a8 | 1464 | qc[n] = TMath::Abs(c->GetQ()); |
1fd9389f | 1465 | // pad row of leading |
1466 | ||
b72f4eaf | 1467 | xc[n] = fX0 - c->GetX(); |
1468 | ||
1fd9389f | 1469 | // Recalculate cluster error based on tracking information |
2eb10c34 | 1470 | c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], -1./*zcorr?zt:-1.*/, dydx); |
c79857d5 | 1471 | c->SetSigmaZ2(fPad[0]*fPad[0]/12.); // for HLT |
1fd9389f | 1472 | sy[n] = TMath::Sqrt(c->GetSigmaY2()); |
1473 | ||
fc0882f3 | 1474 | yc[n] = recoParam->UseGAUS() ? |
1fd9389f | 1475 | c->GetYloc(y0, sy[n], GetPadWidth()): c->GetY(); |
1476 | zc[n] = c->GetZ(); | |
2eb10c34 | 1477 | |
1478 | //optional r-phi correction | |
1479 | //printf(" n[%2d] yc[%7.5f] ", n, yc[n]); | |
1480 | Float_t correction(0.); | |
1481 | if(tilt) correction = fPad[2]*(xc[n]*dzdx + zc[n] - z0); | |
1482 | else if(pseudo) correction = fPad[2]*(xc[n]*fZfit[1] + zc[n]-fZfit[0]); | |
1483 | yc[n]-=correction; | |
1484 | //printf("corr(%s%s)[%7.5f] yc1[%7.5f]\n", (tilt?"TC":""), (zcorr?"PC":""), correction, yc[n]); | |
1fd9389f | 1485 | |
fbe11be7 | 1486 | AliDebug(5, Form(" tb[%2d] dx[%6.3f] y[%6.2f+-%6.3f]", c->GetLocalTimeBin(), xc[n], yc[n], sy[n])); |
903326c1 | 1487 | fitterY.AddPoint(&xc[n], yc[n], sy[n]); |
2eb10c34 | 1488 | if(rc) fitterZ.AddPoint(&xc[n], qc[n]*(ic<kNtb?1.:-1.), 1.); |
dd8059a8 | 1489 | n++; |
29b87567 | 1490 | } |
3044dfe5 | 1491 | |
47d5d320 | 1492 | // to few clusters |
c79857d5 | 1493 | if (n < kClmin){ |
c388cdcb | 1494 | AliDebug(1, Form("Not enough clusters to fit. Clusters: Attached[%d] Fit[%d].", GetN(), n)); |
2eb10c34 | 1495 | SetErrorMsg(kFitCl); |
c79857d5 | 1496 | return kFALSE; |
1497 | } | |
d937ad7a | 1498 | // fit XY |
903326c1 | 1499 | if(!fitterY.Eval()){ |
c388cdcb | 1500 | AliDebug(1, "Fit Y failed."); |
2eb10c34 | 1501 | SetErrorMsg(kFitFailedY); |
903326c1 | 1502 | return kFALSE; |
1503 | } | |
5f1ae1e7 | 1504 | fYfit[0] = fitterY.GetFunctionParameter(0); |
1505 | fYfit[1] = -fitterY.GetFunctionParameter(1); | |
d937ad7a | 1506 | // store covariance |
5f1ae1e7 | 1507 | Double_t p[3]; |
1508 | fitterY.GetCovarianceMatrix(p); | |
2eb10c34 | 1509 | fCov[0] = kScalePulls*p[1]; // variance of y0 |
1510 | fCov[1] = kScalePulls*p[2]; // covariance of y0, dydx | |
1511 | fCov[2] = kScalePulls*p[0]; // variance of dydx | |
b1957d3c | 1512 | // the ref radial position is set at the minimum of |
1513 | // the y variance of the tracklet | |
b72f4eaf | 1514 | fX = -fCov[1]/fCov[2]; |
2eb10c34 | 1515 | fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2]; |
1516 | ||
903326c1 | 1517 | Float_t xs=fX+.5*AliTRDgeometry::CamHght(); |
1518 | if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){ | |
1519 | AliDebug(1, Form("Ref radial position ouside chamber x[%5.2f].", fX)); | |
2eb10c34 | 1520 | SetErrorMsg(kFitFailedY); |
903326c1 | 1521 | return kFALSE; |
1522 | } | |
b1957d3c | 1523 | |
2eb10c34 | 1524 | /* // THE LEADING CLUSTER METHOD for z fit |
1fd9389f | 1525 | Float_t xMin = fX0; |
b72f4eaf | 1526 | Int_t ic=n=kNclusters-1; jc = &fClusters[ic]; |
1fd9389f | 1527 | AliTRDcluster *c0 =0x0, **kc = &fClusters[kNtb-1]; |
1528 | for(; ic>kNtb; ic--, --jc, --kc){ | |
1529 | if((c0 = (*kc)) && c0->IsInChamber() && (xMin>c0->GetX())) xMin = c0->GetX(); | |
1530 | if(!(c = (*jc))) continue; | |
1531 | if(!c->IsInChamber()) continue; | |
1532 | zc[kNclusters-1] = c->GetZ(); | |
1533 | fX = fX0 - c->GetX(); | |
1534 | } | |
1535 | fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.; | |
1536 | // Error parameterization | |
1537 | fS2Z = fdX*fZref[1]; | |
e355f67a | 1538 | fS2Z *= fS2Z; fS2Z *= 0.2887; // 1/sqrt(12)*/ |
1539 | ||
2eb10c34 | 1540 | // fit QZ |
1541 | if(opt!=1 && IsRowCross()){ | |
1542 | if(!fitterZ.Eval()) SetErrorMsg(kFitFailedZ); | |
4ecadb52 | 1543 | if(!HasError(kFitFailedZ) && TMath::Abs(fitterZ.GetFunctionParameter(1))>1.e-10){ |
2eb10c34 | 1544 | // TODO - one has to recalculate xy fit based on |
1545 | // better knowledge of z position | |
1546 | // Double_t x = -fitterZ.GetFunctionParameter(0)/fitterZ.GetFunctionParameter(1); | |
1547 | // Double_t z0 = .5*(zc[0]+zc[n-1]); | |
1548 | // fZfit[0] = z0 + fZfit[1]*x; | |
1549 | // fZfit[1] = fZfit[0]/fX0; | |
1550 | // redo fit on xy plane | |
b72f4eaf | 1551 | } |
c850c351 | 1552 | // temporary external error parameterization |
1553 | fS2Z = 0.05+0.4*TMath::Abs(fZref[1]); fS2Z *= fS2Z; | |
1554 | // TODO correct formula | |
1555 | //fS2Z = sigma_x*TMath::Abs(fZref[1]); | |
b1957d3c | 1556 | } else { |
2eb10c34 | 1557 | //fZfit[0] = zc[0] + dzdx*0.5*AliTRDgeometry::CdrHght(); |
dd8059a8 | 1558 | fS2Z = GetPadLength()*GetPadLength()/12.; |
29b87567 | 1559 | } |
29b87567 | 1560 | return kTRUE; |
e4f2f73d | 1561 | } |
1562 | ||
e4f2f73d | 1563 | |
f29f13a6 | 1564 | /* |
e3cf3d02 | 1565 | //_____________________________________________________________________________ |
1566 | void AliTRDseedV1::FitMI() | |
1567 | { | |
1568 | // | |
1569 | // Fit the seed. | |
1570 | // Marian Ivanov's version | |
1571 | // | |
1572 | // linear fit on the y direction with respect to the reference direction. | |
1573 | // The residuals for each x (x = xc - x0) are deduced from: | |
1574 | // dy = y - yt (1) | |
1575 | // the tilting correction is written : | |
1576 | // y = yc + h*(zc-zt) (2) | |
1577 | // yt = y0+dy/dx*x (3) | |
1578 | // zt = z0+dz/dx*x (4) | |
1579 | // from (1),(2),(3) and (4) | |
1580 | // dy = yc - y0 - (dy/dx + h*dz/dx)*x + h*(zc-z0) | |
1581 | // the last term introduces the correction on y direction due to tilting pads. There are 2 ways to account for this: | |
1582 | // 1. use tilting correction for calculating the y | |
1583 | // 2. neglect tilting correction here and account for it in the error parametrization of the tracklet. | |
1584 | const Float_t kRatio = 0.8; | |
1585 | const Int_t kClmin = 5; | |
1586 | const Float_t kmaxtan = 2; | |
1587 | ||
1588 | if (TMath::Abs(fYref[1]) > kmaxtan){ | |
1589 | //printf("Exit: Abs(fYref[1]) = %3.3f, kmaxtan = %3.3f\n", TMath::Abs(fYref[1]), kmaxtan); | |
1590 | return; // Track inclined too much | |
1591 | } | |
1592 | ||
1593 | Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction | |
dd8059a8 | 1594 | Float_t ycrosscor = GetPadLength() * GetTilt() * 0.5; // Y correction for crossing |
e3cf3d02 | 1595 | Int_t fNChange = 0; |
1596 | ||
1597 | Double_t sumw; | |
1598 | Double_t sumwx; | |
1599 | Double_t sumwx2; | |
1600 | Double_t sumwy; | |
1601 | Double_t sumwxy; | |
1602 | Double_t sumwz; | |
1603 | Double_t sumwxz; | |
1604 | ||
1605 | // Buffering: Leave it constant fot Performance issues | |
1606 | Int_t zints[kNtb]; // Histograming of the z coordinate | |
1607 | // Get 1 and second max probable coodinates in z | |
1608 | Int_t zouts[2*kNtb]; | |
1609 | Float_t allowedz[kNtb]; // Allowed z for given time bin | |
1610 | Float_t yres[kNtb]; // Residuals from reference | |
dd8059a8 | 1611 | //Float_t anglecor = GetTilt() * fZref[1]; // Correction to the angle |
e3cf3d02 | 1612 | |
1613 | Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t)); | |
1614 | Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb]; | |
1615 | ||
1616 | Int_t fN = 0; AliTRDcluster *c = 0x0; | |
1617 | fN2 = 0; | |
1618 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) { | |
1619 | yres[i] = 10000.0; | |
1620 | if (!(c = fClusters[i])) continue; | |
1621 | if(!c->IsInChamber()) continue; | |
1622 | // Residual y | |
dd8059a8 | 1623 | //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + GetTilt()*(fZ[i] - fZref[0]); |
e3cf3d02 | 1624 | fX[i] = fX0 - c->GetX(); |
1625 | fY[i] = c->GetY(); | |
1626 | fZ[i] = c->GetZ(); | |
dd8059a8 | 1627 | yres[i] = fY[i] - GetTilt()*(fZ[i] - (fZref[0] - fX[i]*fZref[1])); |
e3cf3d02 | 1628 | zints[fN] = Int_t(fZ[i]); |
1629 | fN++; | |
1630 | } | |
1631 | ||
1632 | if (fN < kClmin){ | |
1633 | //printf("Exit fN < kClmin: fN = %d\n", fN); | |
1634 | return; | |
1635 | } | |
1636 | Int_t nz = AliTRDtrackerV1::Freq(fN, zints, zouts, kFALSE); | |
1637 | Float_t fZProb = zouts[0]; | |
1638 | if (nz <= 1) zouts[3] = 0; | |
1639 | if (zouts[1] + zouts[3] < kClmin) { | |
1640 | //printf("Exit zouts[1] = %d, zouts[3] = %d\n",zouts[1],zouts[3]); | |
1641 | return; | |
1642 | } | |
1643 | ||
1644 | // Z distance bigger than pad - length | |
1645 | if (TMath::Abs(zouts[0]-zouts[2]) > 12.0) zouts[3] = 0; | |
1646 | ||
1647 | Int_t breaktime = -1; | |
1648 | Bool_t mbefore = kFALSE; | |
1649 | Int_t cumul[kNtb][2]; | |
1650 | Int_t counts[2] = { 0, 0 }; | |
1651 | ||
1652 | if (zouts[3] >= 3) { | |
1653 | ||
1654 | // | |
1655 | // Find the break time allowing one chage on pad-rows | |
1656 | // with maximal number of accepted clusters | |
1657 | // | |
1658 | fNChange = 1; | |
1659 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) { | |
1660 | cumul[i][0] = counts[0]; | |
1661 | cumul[i][1] = counts[1]; | |
1662 | if (TMath::Abs(fZ[i]-zouts[0]) < 2) counts[0]++; | |
1663 | if (TMath::Abs(fZ[i]-zouts[2]) < 2) counts[1]++; | |
1664 | } | |
1665 | Int_t maxcount = 0; | |
1666 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) { | |
1667 | Int_t after = cumul[AliTRDtrackerV1::GetNTimeBins()][0] - cumul[i][0]; | |
1668 | Int_t before = cumul[i][1]; | |
1669 | if (after + before > maxcount) { | |
1670 | maxcount = after + before; | |
1671 | breaktime = i; | |
1672 | mbefore = kFALSE; | |
1673 | } | |
1674 | after = cumul[AliTRDtrackerV1::GetNTimeBins()-1][1] - cumul[i][1]; | |
1675 | before = cumul[i][0]; | |
1676 | if (after + before > maxcount) { | |
1677 | maxcount = after + before; | |
1678 | breaktime = i; | |
1679 | mbefore = kTRUE; | |
1680 | } | |
1681 | } | |
1682 | breaktime -= 1; | |
1683 | } | |
1684 | ||
1685 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1686 | if (i > breaktime) allowedz[i] = mbefore ? zouts[2] : zouts[0]; | |
1687 | if (i <= breaktime) allowedz[i] = (!mbefore) ? zouts[2] : zouts[0]; | |
1688 | } | |
1689 | ||
1690 | if (((allowedz[0] > allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] < 0)) || | |
1691 | ((allowedz[0] < allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] > 0))) { | |
1692 | // | |
1693 | // Tracklet z-direction not in correspondance with track z direction | |
1694 | // | |
1695 | fNChange = 0; | |
1696 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1697 | allowedz[i] = zouts[0]; // Only longest taken | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | if (fNChange > 0) { | |
1702 | // | |
1703 | // Cross pad -row tracklet - take the step change into account | |
1704 | // | |
1705 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1706 | if (!fClusters[i]) continue; | |
1707 | if(!fClusters[i]->IsInChamber()) continue; | |
1708 | if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue; | |
1709 | // Residual y | |
dd8059a8 | 1710 | //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + GetTilt()*(fZ[i] - fZref[0]); |
1711 | yres[i] = fY[i] - GetTilt()*(fZ[i] - (fZref[0] - fX[i]*fZref[1])); | |
f29f13a6 | 1712 | // if (TMath::Abs(fZ[i] - fZProb) > 2) { |
dd8059a8 | 1713 | // if (fZ[i] > fZProb) yres[i] += GetTilt() * GetPadLength(); |
1714 | // if (fZ[i] < fZProb) yres[i] -= GetTilt() * GetPadLength(); | |
f29f13a6 | 1715 | } |
e3cf3d02 | 1716 | } |
1717 | } | |
1718 | ||
1719 | Double_t yres2[kNtb]; | |
1720 | Double_t mean; | |
1721 | Double_t sigma; | |
1722 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1723 | if (!fClusters[i]) continue; | |
1724 | if(!fClusters[i]->IsInChamber()) continue; | |
1725 | if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue; | |
1726 | yres2[fN2] = yres[i]; | |
1727 | fN2++; | |
1728 | } | |
1729 | if (fN2 < kClmin) { | |
1730 | //printf("Exit fN2 < kClmin: fN2 = %d\n", fN2); | |
1731 | fN2 = 0; | |
1732 | return; | |
1733 | } | |
1734 | AliMathBase::EvaluateUni(fN2,yres2,mean,sigma, Int_t(fN2*kRatio-2.)); | |
1735 | if (sigma < sigmaexp * 0.8) { | |
1736 | sigma = sigmaexp; | |
1737 | } | |
1738 | //Float_t fSigmaY = sigma; | |
1739 | ||
1740 | // Reset sums | |
1741 | sumw = 0; | |
1742 | sumwx = 0; | |
1743 | sumwx2 = 0; | |
1744 | sumwy = 0; | |
1745 | sumwxy = 0; | |
1746 | sumwz = 0; | |
1747 | sumwxz = 0; | |
1748 | ||
1749 | fN2 = 0; | |
1750 | Float_t fMeanz = 0; | |
1751 | Float_t fMPads = 0; | |
1752 | fUsable = 0; | |
1753 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1754 | if (!fClusters[i]) continue; | |
1755 | if (!fClusters[i]->IsInChamber()) continue; | |
1756 | if (TMath::Abs(fZ[i] - allowedz[i]) > 2){fClusters[i] = 0x0; continue;} | |
1757 | if (TMath::Abs(yres[i] - mean) > 4.0 * sigma){fClusters[i] = 0x0; continue;} | |
1758 | SETBIT(fUsable,i); | |
1759 | fN2++; | |
1760 | fMPads += fClusters[i]->GetNPads(); | |
1761 | Float_t weight = 1.0; | |
1762 | if (fClusters[i]->GetNPads() > 4) weight = 0.5; | |
1763 | if (fClusters[i]->GetNPads() > 5) weight = 0.2; | |
1764 | ||
1765 | ||
1766 | Double_t x = fX[i]; | |
1767 | //printf("x = %7.3f dy = %7.3f fit %7.3f\n", x, yres[i], fY[i]-yres[i]); | |
1768 | ||
1769 | sumw += weight; | |
1770 | sumwx += x * weight; | |
1771 | sumwx2 += x*x * weight; | |
1772 | sumwy += weight * yres[i]; | |
1773 | sumwxy += weight * (yres[i]) * x; | |
1774 | sumwz += weight * fZ[i]; | |
1775 | sumwxz += weight * fZ[i] * x; | |
1776 | ||
1777 | } | |
1778 | ||
1779 | if (fN2 < kClmin){ | |
1780 | //printf("Exit fN2 < kClmin(2): fN2 = %d\n",fN2); | |
1781 | fN2 = 0; | |
1782 | return; | |
1783 | } | |
1784 | fMeanz = sumwz / sumw; | |
1785 | Float_t correction = 0; | |
1786 | if (fNChange > 0) { | |
1787 | // Tracklet on boundary | |
1788 | if (fMeanz < fZProb) correction = ycrosscor; | |
1789 | if (fMeanz > fZProb) correction = -ycrosscor; | |
1790 | } | |
1791 | ||
1792 | Double_t det = sumw * sumwx2 - sumwx * sumwx; | |
1793 | fYfit[0] = (sumwx2 * sumwy - sumwx * sumwxy) / det; | |
1794 | fYfit[1] = (sumw * sumwxy - sumwx * sumwy) / det; | |
1795 | ||
1796 | fS2Y = 0; | |
1797 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1798 | if (!TESTBIT(fUsable,i)) continue; | |
1799 | Float_t delta = yres[i] - fYfit[0] - fYfit[1] * fX[i]; | |
1800 | fS2Y += delta*delta; | |
1801 | } | |
1802 | fS2Y = TMath::Sqrt(fS2Y / Float_t(fN2-2)); | |
1803 | // TEMPORARY UNTIL covariance properly calculated | |
1804 | fS2Y = TMath::Max(fS2Y, Float_t(.1)); | |
1805 | ||
1806 | fZfit[0] = (sumwx2 * sumwz - sumwx * sumwxz) / det; | |
1807 | fZfit[1] = (sumw * sumwxz - sumwx * sumwz) / det; | |
1808 | // fYfitR[0] += fYref[0] + correction; | |
1809 | // fYfitR[1] += fYref[1]; | |
1810 | // fYfit[0] = fYfitR[0]; | |
1811 | fYfit[1] = -fYfit[1]; | |
1812 | ||
1813 | UpdateUsed(); | |
f29f13a6 | 1814 | }*/ |
e3cf3d02 | 1815 | |
e4f2f73d | 1816 | //___________________________________________________________________ |
203967fc | 1817 | void AliTRDseedV1::Print(Option_t *o) const |
e4f2f73d | 1818 | { |
1819 | // | |
1820 | // Printing the seedstatus | |
1821 | // | |
1822 | ||
b72f4eaf | 1823 | AliInfo(Form("Det[%3d] X0[%7.2f] Pad{L[%5.2f] W[%5.2f] Tilt[%+6.2f]}", fDet, fX0, GetPadLength(), GetPadWidth(), GetTilt())); |
dd8059a8 | 1824 | AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d] [%d]", GetN(), GetNUsed(), GetNShared(), fN)); |
b72f4eaf | 1825 | AliInfo(Form("FLAGS : RC[%c] Kink[%c] SA[%c]", IsRowCross()?'y':'n', IsKink()?'y':'n', IsStandAlone()?'y':'n')); |
525f399b | 1826 | 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 | 1827 | |
1828 | Double_t cov[3], x=GetX(); | |
1829 | GetCovAt(x, cov); | |
1830 | AliInfo(" | x[cm] | y[cm] | z[cm] | dydx | dzdx |"); | |
1831 | 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])); | |
16cca13f | 1832 | 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 | 1833 | AliInfo(Form("P / Pt [GeV/c] = %f / %f", GetMomentum(), fPt)); |
68f9b6bd | 1834 | if(IsStandAlone()) AliInfo(Form("C Rieman / Vertex [1/cm] = %f / %f", fC[0], fC[1])); |
ee8fb199 | 1835 | 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])); |
1836 | AliInfo(Form("PID = %5.3f / %5.3f / %5.3f / %5.3f / %5.3f", fProb[0], fProb[1], fProb[2], fProb[3], fProb[4])); | |
203967fc | 1837 | |
1838 | if(strcmp(o, "a")!=0) return; | |
1839 | ||
4dc4dc2e | 1840 | AliTRDcluster* const* jc = &fClusters[0]; |
8d2bec9e | 1841 | for(int ic=0; ic<kNclusters; ic++, jc++) { |
4dc4dc2e | 1842 | if(!(*jc)) continue; |
203967fc | 1843 | (*jc)->Print(o); |
4dc4dc2e | 1844 | } |
e4f2f73d | 1845 | } |
47d5d320 | 1846 | |
203967fc | 1847 | |
1848 | //___________________________________________________________________ | |
1849 | Bool_t AliTRDseedV1::IsEqual(const TObject *o) const | |
1850 | { | |
1851 | // Checks if current instance of the class has the same essential members | |
1852 | // as the given one | |
1853 | ||
1854 | if(!o) return kFALSE; | |
1855 | const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o); | |
1856 | if(!inTracklet) return kFALSE; | |
1857 | ||
1858 | for (Int_t i = 0; i < 2; i++){ | |
e3cf3d02 | 1859 | if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE; |
1860 | if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE; | |
203967fc | 1861 | } |
1862 | ||
4ecadb52 | 1863 | if ( TMath::Abs(fS2Y - inTracklet->fS2Y)>1.e-10 ) return kFALSE; |
1864 | if ( TMath::Abs(GetTilt() - inTracklet->GetTilt())>1.e-10 ) return kFALSE; | |
1865 | if ( TMath::Abs(GetPadLength() - inTracklet->GetPadLength())>1.e-10 ) return kFALSE; | |
203967fc | 1866 | |
8d2bec9e | 1867 | for (Int_t i = 0; i < kNclusters; i++){ |
e3cf3d02 | 1868 | // if ( fX[i] != inTracklet->GetX(i) ) return kFALSE; |
1869 | // if ( fY[i] != inTracklet->GetY(i) ) return kFALSE; | |
1870 | // if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE; | |
1871 | if ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE; | |
203967fc | 1872 | } |
f29f13a6 | 1873 | // if ( fUsable != inTracklet->fUsable ) return kFALSE; |
203967fc | 1874 | |
1875 | for (Int_t i=0; i < 2; i++){ | |
e3cf3d02 | 1876 | if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE; |
1877 | if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE; | |
1878 | if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE; | |
203967fc | 1879 | } |
1880 | ||
e3cf3d02 | 1881 | /* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE; |
1882 | if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/ | |
3e778975 | 1883 | if ( fN != inTracklet->fN ) return kFALSE; |
1884 | //if ( fNUsed != inTracklet->fNUsed ) return kFALSE; | |
e3cf3d02 | 1885 | //if ( fFreq != inTracklet->GetFreq() ) return kFALSE; |
1886 | //if ( fNChange != inTracklet->GetNChange() ) return kFALSE; | |
203967fc | 1887 | |
4ecadb52 | 1888 | if ( TMath::Abs(fC[0] - inTracklet->fC[0])>1.e-10 ) return kFALSE; |
e3cf3d02 | 1889 | //if ( fCC != inTracklet->GetCC() ) return kFALSE; |
4ecadb52 | 1890 | if ( TMath::Abs(fChi2 - inTracklet->fChi2)>1.e-10 ) return kFALSE; |
203967fc | 1891 | // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE; |
1892 | ||
e3cf3d02 | 1893 | if ( fDet != inTracklet->fDet ) return kFALSE; |
4ecadb52 | 1894 | if ( TMath::Abs(fPt - inTracklet->fPt)>1.e-10 ) return kFALSE; |
1895 | if ( TMath::Abs(fdX - inTracklet->fdX)>1.e-10 ) return kFALSE; | |
203967fc | 1896 | |
8d2bec9e | 1897 | for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){ |
203967fc | 1898 | AliTRDcluster *curCluster = fClusters[iCluster]; |
e3cf3d02 | 1899 | AliTRDcluster *inCluster = inTracklet->fClusters[iCluster]; |
203967fc | 1900 | if (curCluster && inCluster){ |
1901 | if (! curCluster->IsEqual(inCluster) ) { | |
1902 | curCluster->Print(); | |
1903 | inCluster->Print(); | |
1904 | return kFALSE; | |
1905 | } | |
1906 | } else { | |
1907 | // if one cluster exists, and corresponding | |
1908 | // in other tracklet doesn't - return kFALSE | |
1909 | if(curCluster || inCluster) return kFALSE; | |
1910 | } | |
1911 | } | |
1912 | return kTRUE; | |
1913 | } | |
5d401b45 | 1914 |