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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 | //////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // The TRD track seed // | |
21 | // // | |
22 | // Authors: // | |
23 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
24 | // Markus Fasel <M.Fasel@gsi.de> // | |
25 | // // | |
26 | //////////////////////////////////////////////////////////////////////////// | |
27 | ||
28 | #include "TMath.h" | |
29 | #include "TLinearFitter.h" | |
eb38ed55 | 30 | #include "TClonesArray.h" // tmp |
31 | #include <TTreeStream.h> | |
e4f2f73d | 32 | |
33 | #include "AliLog.h" | |
34 | #include "AliMathBase.h" | |
d937ad7a | 35 | #include "AliCDBManager.h" |
36 | #include "AliTracker.h" | |
e4f2f73d | 37 | |
03cef9b2 | 38 | #include "AliTRDpadPlane.h" |
e4f2f73d | 39 | #include "AliTRDcluster.h" |
f3d3af1b | 40 | #include "AliTRDseedV1.h" |
41 | #include "AliTRDtrackV1.h" | |
e4f2f73d | 42 | #include "AliTRDcalibDB.h" |
eb38ed55 | 43 | #include "AliTRDchamberTimeBin.h" |
44 | #include "AliTRDtrackingChamber.h" | |
45 | #include "AliTRDtrackerV1.h" | |
46 | #include "AliTRDReconstructor.h" | |
e4f2f73d | 47 | #include "AliTRDrecoParam.h" |
a076fc2f | 48 | #include "AliTRDCommonParam.h" |
d937ad7a | 49 | |
0906e73e | 50 | #include "Cal/AliTRDCalPID.h" |
d937ad7a | 51 | #include "Cal/AliTRDCalROC.h" |
52 | #include "Cal/AliTRDCalDet.h" | |
e4f2f73d | 53 | |
e4f2f73d | 54 | ClassImp(AliTRDseedV1) |
55 | ||
56 | //____________________________________________________________________ | |
ae4e8b84 | 57 | AliTRDseedV1::AliTRDseedV1(Int_t det) |
e3cf3d02 | 58 | :TObject() |
3a039a31 | 59 | ,fReconstructor(0x0) |
ae4e8b84 | 60 | ,fClusterIter(0x0) |
e3cf3d02 | 61 | ,fExB(0.) |
62 | ,fVD(0.) | |
63 | ,fT0(0.) | |
64 | ,fS2PRF(0.) | |
65 | ,fDiffL(0.) | |
66 | ,fDiffT(0.) | |
ae4e8b84 | 67 | ,fClusterIdx(0) |
e3cf3d02 | 68 | ,fUsable(0) |
69 | ,fN2(0) | |
70 | ,fNUsed(0) | |
ae4e8b84 | 71 | ,fDet(det) |
e3cf3d02 | 72 | ,fTilt(0.) |
73 | ,fPadLength(0.) | |
0906e73e | 74 | ,fMom(0.) |
bcb6fb78 | 75 | ,fdX(0.) |
e3cf3d02 | 76 | ,fX0(0.) |
77 | ,fX(0.) | |
78 | ,fY(0.) | |
79 | ,fZ(0.) | |
80 | ,fS2Y(0.) | |
81 | ,fS2Z(0.) | |
82 | ,fC(0.) | |
83 | ,fChi2(0.) | |
e4f2f73d | 84 | { |
85 | // | |
86 | // Constructor | |
87 | // | |
e3cf3d02 | 88 | for(Int_t ic=kNTimeBins; ic--;) fIndexes[ic] = -1; |
89 | memset(fClusters, 0, kNTimeBins*sizeof(AliTRDcluster*)); | |
90 | fYref[0] = 0.; fYref[1] = 0.; | |
91 | fZref[0] = 0.; fZref[1] = 0.; | |
92 | fYfit[0] = 0.; fYfit[1] = 0.; | |
93 | fZfit[0] = 0.; fZfit[1] = 0.; | |
94 | memset(fdEdx, 0, kNSlices*sizeof(Float_t)); | |
29b87567 | 95 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
e3cf3d02 | 96 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels |
97 | fLabels[2]=0; // number of different labels for tracklet | |
6e4d4425 | 98 | fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.; |
d937ad7a | 99 | // covariance matrix [diagonal] |
100 | // default sy = 200um and sz = 2.3 cm | |
101 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; | |
e4f2f73d | 102 | } |
103 | ||
104 | //____________________________________________________________________ | |
0906e73e | 105 | AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref) |
e3cf3d02 | 106 | :TObject((TObject&)ref) |
107 | ,fReconstructor(0x0) | |
ae4e8b84 | 108 | ,fClusterIter(0x0) |
e3cf3d02 | 109 | ,fExB(0.) |
110 | ,fVD(0.) | |
111 | ,fT0(0.) | |
112 | ,fS2PRF(0.) | |
113 | ,fDiffL(0.) | |
114 | ,fDiffT(0.) | |
ae4e8b84 | 115 | ,fClusterIdx(0) |
e3cf3d02 | 116 | ,fUsable(0) |
117 | ,fN2(0) | |
118 | ,fNUsed(0) | |
119 | ,fDet(-1) | |
120 | ,fTilt(0.) | |
121 | ,fPadLength(0.) | |
122 | ,fMom(0.) | |
123 | ,fdX(0.) | |
124 | ,fX0(0.) | |
125 | ,fX(0.) | |
126 | ,fY(0.) | |
127 | ,fZ(0.) | |
128 | ,fS2Y(0.) | |
129 | ,fS2Z(0.) | |
130 | ,fC(0.) | |
131 | ,fChi2(0.) | |
e4f2f73d | 132 | { |
133 | // | |
134 | // Copy Constructor performing a deep copy | |
135 | // | |
e3cf3d02 | 136 | if(this != &ref){ |
137 | ref.Copy(*this); | |
138 | } | |
29b87567 | 139 | SetBit(kOwner, kFALSE); |
fbb2ea06 | 140 | } |
d9950a5a | 141 | |
0906e73e | 142 | |
e4f2f73d | 143 | //____________________________________________________________________ |
144 | AliTRDseedV1& AliTRDseedV1::operator=(const AliTRDseedV1 &ref) | |
145 | { | |
146 | // | |
147 | // Assignment Operator using the copy function | |
148 | // | |
149 | ||
29b87567 | 150 | if(this != &ref){ |
151 | ref.Copy(*this); | |
152 | } | |
221ab7e0 | 153 | SetBit(kOwner, kFALSE); |
154 | ||
29b87567 | 155 | return *this; |
e4f2f73d | 156 | } |
157 | ||
158 | //____________________________________________________________________ | |
159 | AliTRDseedV1::~AliTRDseedV1() | |
160 | { | |
161 | // | |
162 | // Destructor. The RecoParam object belongs to the underlying tracker. | |
163 | // | |
164 | ||
29b87567 | 165 | //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO"); |
e4f2f73d | 166 | |
e3cf3d02 | 167 | if(IsOwner()) { |
168 | for(int itb=0; itb<kNTimeBins; itb++){ | |
29b87567 | 169 | if(!fClusters[itb]) continue; |
170 | //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb)); | |
171 | delete fClusters[itb]; | |
172 | fClusters[itb] = 0x0; | |
173 | } | |
e3cf3d02 | 174 | } |
e4f2f73d | 175 | } |
176 | ||
177 | //____________________________________________________________________ | |
178 | void AliTRDseedV1::Copy(TObject &ref) const | |
179 | { | |
180 | // | |
181 | // Copy function | |
182 | // | |
183 | ||
29b87567 | 184 | //AliInfo(""); |
185 | AliTRDseedV1 &target = (AliTRDseedV1 &)ref; | |
186 | ||
e3cf3d02 | 187 | target.fReconstructor = fReconstructor; |
ae4e8b84 | 188 | target.fClusterIter = 0x0; |
e3cf3d02 | 189 | target.fExB = fExB; |
190 | target.fVD = fVD; | |
191 | target.fT0 = fT0; | |
192 | target.fS2PRF = fS2PRF; | |
193 | target.fDiffL = fDiffL; | |
194 | target.fDiffT = fDiffT; | |
ae4e8b84 | 195 | target.fClusterIdx = 0; |
e3cf3d02 | 196 | target.fUsable = fUsable; |
197 | target.fN2 = fN2; | |
198 | target.fNUsed = fNUsed; | |
ae4e8b84 | 199 | target.fDet = fDet; |
e3cf3d02 | 200 | target.fTilt = fTilt; |
201 | target.fPadLength = fPadLength; | |
29b87567 | 202 | target.fMom = fMom; |
29b87567 | 203 | target.fdX = fdX; |
e3cf3d02 | 204 | target.fX0 = fX0; |
205 | target.fX = fX; | |
206 | target.fY = fY; | |
207 | target.fZ = fZ; | |
208 | target.fS2Y = fS2Y; | |
209 | target.fS2Z = fS2Z; | |
210 | target.fC = fC; | |
211 | target.fChi2 = fChi2; | |
29b87567 | 212 | |
e3cf3d02 | 213 | memcpy(target.fIndexes, fIndexes, kNTimeBins*sizeof(Int_t)); |
214 | memcpy(target.fClusters, fClusters, kNTimeBins*sizeof(AliTRDcluster*)); | |
215 | target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1]; | |
216 | target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1]; | |
217 | target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1]; | |
218 | target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1]; | |
219 | memcpy(target.fdEdx, fdEdx, kNSlices*sizeof(Float_t)); | |
220 | memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t)); | |
221 | memcpy(target.fLabels, fLabels, 3*sizeof(Int_t)); | |
222 | memcpy(target.fRefCov, fRefCov, 3*sizeof(Double_t)); | |
223 | memcpy(target.fCov, fCov, 3*sizeof(Double_t)); | |
29b87567 | 224 | |
e3cf3d02 | 225 | TObject::Copy(ref); |
e4f2f73d | 226 | } |
227 | ||
0906e73e | 228 | |
229 | //____________________________________________________________ | |
f3d3af1b | 230 | Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track) |
0906e73e | 231 | { |
232 | // Initialize this tracklet using the track information | |
233 | // | |
234 | // Parameters: | |
235 | // track - the TRD track used to initialize the tracklet | |
236 | // | |
237 | // Detailed description | |
238 | // The function sets the starting point and direction of the | |
239 | // tracklet according to the information from the TRD track. | |
240 | // | |
241 | // Caution | |
242 | // The TRD track has to be propagated to the beginning of the | |
243 | // chamber where the tracklet will be constructed | |
244 | // | |
245 | ||
29b87567 | 246 | Double_t y, z; |
247 | if(!track->GetProlongation(fX0, y, z)) return kFALSE; | |
b1957d3c | 248 | UpDate(track); |
29b87567 | 249 | return kTRUE; |
0906e73e | 250 | } |
251 | ||
bcb6fb78 | 252 | |
e3cf3d02 | 253 | //_____________________________________________________________________________ |
254 | void AliTRDseedV1::Reset() | |
255 | { | |
256 | // | |
257 | // Reset seed | |
258 | // | |
259 | fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.; | |
260 | fDiffL=0.;fDiffT=0.; | |
261 | fClusterIdx=0;fUsable=0; | |
262 | fN2=0;fNUsed=0; | |
263 | fDet=-1;fTilt=0.;fPadLength=0.; | |
264 | fMom=0.; | |
265 | fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.; | |
266 | fS2Y=0.; fS2Z=0.; | |
267 | fC=0.; fChi2 = 0.; | |
268 | ||
269 | for(Int_t ic=kNTimeBins; ic--;) fIndexes[ic] = -1; | |
270 | memset(fClusters, 0, kNTimeBins*sizeof(AliTRDcluster*)); | |
271 | fYref[0] = 0.; fYref[1] = 0.; | |
272 | fZref[0] = 0.; fZref[1] = 0.; | |
273 | fYfit[0] = 0.; fYfit[1] = 0.; | |
274 | fZfit[0] = 0.; fZfit[1] = 0.; | |
275 | memset(fdEdx, 0, kNSlices*sizeof(Float_t)); | |
276 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; | |
277 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels | |
278 | fLabels[2]=0; // number of different labels for tracklet | |
279 | fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.; | |
280 | // covariance matrix [diagonal] | |
281 | // default sy = 200um and sz = 2.3 cm | |
282 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; | |
283 | } | |
284 | ||
b1957d3c | 285 | //____________________________________________________________________ |
286 | void AliTRDseedV1::UpDate(const AliTRDtrackV1 *trk) | |
287 | { | |
288 | // update tracklet reference position from the TRD track | |
289 | // Funny name to avoid the clash with the function AliTRDseed::Update() (has to be made obselete) | |
290 | ||
e3cf3d02 | 291 | Double_t fSnp = trk->GetSnp(); |
292 | Double_t fTgl = trk->GetTgl(); | |
b1957d3c | 293 | fMom = trk->GetP(); |
294 | fYref[1] = fSnp/(1. - fSnp*fSnp); | |
295 | fZref[1] = fTgl; | |
296 | SetCovRef(trk->GetCovariance()); | |
297 | ||
298 | Double_t dx = trk->GetX() - fX0; | |
299 | fYref[0] = trk->GetY() - dx*fYref[1]; | |
300 | fZref[0] = trk->GetZ() - dx*fZref[1]; | |
301 | } | |
302 | ||
e3cf3d02 | 303 | //_____________________________________________________________________________ |
304 | void AliTRDseedV1::UpdateUsed() | |
305 | { | |
306 | // | |
307 | // Update used seed | |
308 | // | |
309 | ||
310 | fNUsed = 0; | |
311 | for (Int_t i = kNTimeBins; i--; ) { | |
312 | if (!fClusters[i]) continue; | |
313 | if(!TESTBIT(fUsable, i)) continue; | |
314 | if((fClusters[i]->IsUsed())) fNUsed++; | |
315 | } | |
316 | } | |
317 | ||
318 | //_____________________________________________________________________________ | |
319 | void AliTRDseedV1::UseClusters() | |
320 | { | |
321 | // | |
322 | // Use clusters | |
323 | // | |
324 | AliTRDcluster **c = &fClusters[0]; | |
325 | for (Int_t ic=kNTimeBins; ic--; c++) { | |
326 | if(!(*c)) continue; | |
327 | if(!((*c)->IsUsed())) (*c)->Use(); | |
328 | } | |
329 | } | |
330 | ||
331 | ||
bcb6fb78 | 332 | //____________________________________________________________________ |
333 | void AliTRDseedV1::CookdEdx(Int_t nslices) | |
334 | { | |
335 | // Calculates average dE/dx for all slices and store them in the internal array fdEdx. | |
336 | // | |
337 | // Parameters: | |
338 | // nslices : number of slices for which dE/dx should be calculated | |
339 | // Output: | |
340 | // store results in the internal array fdEdx. This can be accessed with the method | |
341 | // AliTRDseedV1::GetdEdx() | |
342 | // | |
343 | // Detailed description | |
344 | // Calculates average dE/dx for all slices. Depending on the PID methode | |
345 | // the number of slices can be 3 (LQ) or 8(NN). | |
3ee48d6e | 346 | // The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t)) |
bcb6fb78 | 347 | // |
348 | // The following effects are included in the calculation: | |
349 | // 1. calibration values for t0 and vdrift (using x coordinate to calculate slice) | |
350 | // 2. cluster sharing (optional see AliTRDrecoParam::SetClusterSharing()) | |
351 | // 3. cluster size | |
352 | // | |
353 | ||
e3cf3d02 | 354 | Int_t nclusters[kNSlices]; |
355 | memset(nclusters, 0, kNSlices*sizeof(Int_t)); | |
356 | memset(fdEdx, 0, kNSlices*sizeof(Float_t)); | |
357 | ||
e73abf77 | 358 | const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
29b87567 | 359 | |
3ee48d6e | 360 | AliTRDcluster *c = 0x0; |
29b87567 | 361 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ |
8e709c82 | 362 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; |
e73abf77 | 363 | Float_t dx = TMath::Abs(fX0 - c->GetX()); |
29b87567 | 364 | |
365 | // Filter clusters for dE/dx calculation | |
366 | ||
367 | // 1.consider calibration effects for slice determination | |
e73abf77 | 368 | Int_t slice; |
369 | if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber() | |
370 | slice = Int_t(dx * nslices / kDriftLength); | |
371 | } else slice = c->GetX() < fX0 ? nslices-1 : 0; | |
372 | ||
373 | ||
29b87567 | 374 | // 2. take sharing into account |
3ee48d6e | 375 | Float_t w = c->IsShared() ? .5 : 1.; |
29b87567 | 376 | |
377 | // 3. take into account large clusters TODO | |
378 | //w *= c->GetNPads() > 3 ? .8 : 1.; | |
379 | ||
380 | //CHECK !!! | |
381 | fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic]; | |
382 | nclusters[slice]++; | |
383 | } // End of loop over clusters | |
384 | ||
cd40b287 | 385 | //if(fReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){ |
0d83b3a5 | 386 | if(nslices == AliTRDpidUtil::kLQslices){ |
29b87567 | 387 | // calculate mean charge per slice (only LQ PID) |
388 | for(int is=0; is<nslices; is++){ | |
389 | if(nclusters[is]) fdEdx[is] /= nclusters[is]; | |
390 | } | |
391 | } | |
bcb6fb78 | 392 | } |
393 | ||
e3cf3d02 | 394 | //_____________________________________________________________________________ |
395 | void AliTRDseedV1::CookLabels() | |
396 | { | |
397 | // | |
398 | // Cook 2 labels for seed | |
399 | // | |
400 | ||
401 | Int_t labels[200]; | |
402 | Int_t out[200]; | |
403 | Int_t nlab = 0; | |
404 | for (Int_t i = 0; i < kNTimeBins; i++) { | |
405 | if (!fClusters[i]) continue; | |
406 | for (Int_t ilab = 0; ilab < 3; ilab++) { | |
407 | if (fClusters[i]->GetLabel(ilab) >= 0) { | |
408 | labels[nlab] = fClusters[i]->GetLabel(ilab); | |
409 | nlab++; | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | fLabels[2] = AliTRDtrackerV1::Freq(nlab,labels,out,kTRUE); | |
415 | fLabels[0] = out[0]; | |
416 | if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2]; | |
417 | } | |
418 | ||
419 | ||
d937ad7a | 420 | //____________________________________________________________________ |
421 | void AliTRDseedV1::GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y) | |
422 | { | |
423 | // Return corrected position of the cluster taking into | |
424 | // account variation of the drift velocity with drift length. | |
425 | ||
426 | ||
427 | // drift velocity correction TODO to be moved to the clusterizer | |
428 | const Float_t cx[] = { | |
429 | -9.6280e-02, 1.3091e-01,-1.7415e-02,-9.9221e-02,-1.2040e-01,-9.5493e-02, | |
430 | -5.0041e-02,-1.6726e-02, 3.5756e-03, 1.8611e-02, 2.6378e-02, 3.3823e-02, | |
431 | 3.4811e-02, 3.5282e-02, 3.5386e-02, 3.6047e-02, 3.5201e-02, 3.4384e-02, | |
432 | 3.2864e-02, 3.1932e-02, 3.2051e-02, 2.2539e-02,-2.5154e-02,-1.2050e-01, | |
433 | -1.2050e-01 | |
434 | }; | |
435 | ||
436 | // PRF correction TODO to be replaced by the gaussian | |
437 | // approximation with full error parametrization and // moved to the clusterizer | |
438 | const Float_t cy[AliTRDgeometry::kNlayer][3] = { | |
439 | { 4.014e-04, 8.605e-03, -6.880e+00}, | |
440 | {-3.061e-04, 9.663e-03, -6.789e+00}, | |
441 | { 1.124e-03, 1.105e-02, -6.825e+00}, | |
442 | {-1.527e-03, 1.231e-02, -6.777e+00}, | |
443 | { 2.150e-03, 1.387e-02, -6.783e+00}, | |
444 | {-1.296e-03, 1.486e-02, -6.825e+00} | |
445 | }; | |
446 | ||
447 | Int_t ily = AliTRDgeometry::GetLayer(c->GetDetector()); | |
448 | x = c->GetX() - cx[c->GetLocalTimeBin()]; | |
449 | y = c->GetY() + cy[ily][0] + cy[ily][1] * TMath::Sin(cy[ily][2] * c->GetCenter()); | |
450 | return; | |
451 | } | |
b83573da | 452 | |
bcb6fb78 | 453 | //____________________________________________________________________ |
454 | Float_t AliTRDseedV1::GetdQdl(Int_t ic) const | |
455 | { | |
3ee48d6e | 456 | // Using the linear approximation of the track inside one TRD chamber (TRD tracklet) |
457 | // the charge per unit length can be written as: | |
458 | // BEGIN_LATEX | |
459 | // #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dy}{dx}}^{2}_{ref}}} | |
460 | // END_LATEX | |
461 | // where qc is the total charge collected in the current time bin and dx is the length | |
462 | // of the time bin. For the moment (Jan 20 2009) only pad row cross corrections are | |
463 | // considered for the charge but none are applied for drift velocity variations along | |
464 | // the drift region or assymetry of the TRF | |
465 | // | |
466 | // Author : Alex Bercuci <A.Bercuci@gsi.de> | |
467 | // | |
468 | Float_t dq = 0.; | |
469 | if(fClusters[ic]) dq += TMath::Abs(fClusters[ic]->GetQ()); | |
8e709c82 | 470 | if(fClusters[ic+kNtb]) dq += TMath::Abs(fClusters[ic+kNtb]->GetQ()); |
471 | if(dq<1.e-3 || fdX < 1.e-3) return 0.; | |
3ee48d6e | 472 | |
473 | return dq/fdX/TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]); | |
bcb6fb78 | 474 | } |
475 | ||
0906e73e | 476 | //____________________________________________________________________ |
e3cf3d02 | 477 | Float_t* AliTRDseedV1::GetProbability() |
0906e73e | 478 | { |
479 | // Fill probability array for tracklet from the DB. | |
480 | // | |
481 | // Parameters | |
482 | // | |
483 | // Output | |
484 | // returns pointer to the probability array and 0x0 if missing DB access | |
485 | // | |
486 | // Detailed description | |
487 | ||
29b87567 | 488 | |
489 | // retrive calibration db | |
0906e73e | 490 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
491 | if (!calibration) { | |
492 | AliError("No access to calibration data"); | |
493 | return 0x0; | |
494 | } | |
495 | ||
3a039a31 | 496 | if (!fReconstructor) { |
497 | AliError("Reconstructor not set."); | |
4ba1d6ae | 498 | return 0x0; |
499 | } | |
500 | ||
0906e73e | 501 | // Retrieve the CDB container class with the parametric detector response |
3a039a31 | 502 | const AliTRDCalPID *pd = calibration->GetPIDObject(fReconstructor->GetPIDMethod()); |
0906e73e | 503 | if (!pd) { |
504 | AliError("No access to AliTRDCalPID object"); | |
505 | return 0x0; | |
506 | } | |
29b87567 | 507 | //AliInfo(Form("Method[%d] : %s", fReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName())); |
10f75631 | 508 | |
29b87567 | 509 | // calculate tracklet length TO DO |
0906e73e | 510 | Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
511 | /// TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane]) / (1.0 + fTgl[iPlane]*fTgl[iPlane])); | |
512 | ||
513 | //calculate dE/dx | |
3a039a31 | 514 | CookdEdx(fReconstructor->GetNdEdxSlices()); |
0906e73e | 515 | |
516 | // Sets the a priori probabilities | |
517 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) { | |
ae4e8b84 | 518 | fProb[ispec] = pd->GetProbability(ispec, fMom, &fdEdx[0], length, GetPlane()); |
0906e73e | 519 | } |
520 | ||
29b87567 | 521 | return &fProb[0]; |
0906e73e | 522 | } |
523 | ||
e4f2f73d | 524 | //____________________________________________________________________ |
525 | Float_t AliTRDseedV1::GetQuality(Bool_t kZcorr) const | |
526 | { | |
527 | // | |
528 | // Returns a quality measurement of the current seed | |
529 | // | |
530 | ||
e3cf3d02 | 531 | Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.; |
29b87567 | 532 | return |
533 | .5 * TMath::Abs(18.0 - fN2) | |
534 | + 10.* TMath::Abs(fYfit[1] - fYref[1]) | |
535 | + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr) | |
e3cf3d02 | 536 | + 2. * TMath::Abs(fZfit[0] - fZref[0]) / fPadLength; |
e4f2f73d | 537 | } |
538 | ||
0906e73e | 539 | //____________________________________________________________________ |
d937ad7a | 540 | void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const |
0906e73e | 541 | { |
d937ad7a | 542 | // Computes covariance in the y-z plane at radial point x (in tracking coordinates) |
543 | // and returns the results in the preallocated array cov[3] as : | |
544 | // cov[0] = Var(y) | |
545 | // cov[1] = Cov(yz) | |
546 | // cov[2] = Var(z) | |
547 | // | |
548 | // Details | |
549 | // | |
550 | // For the linear transformation | |
551 | // BEGIN_LATEX | |
552 | // Y = T_{x} X^{T} | |
553 | // END_LATEX | |
554 | // The error propagation has the general form | |
555 | // BEGIN_LATEX | |
556 | // C_{Y} = T_{x} C_{X} T_{x}^{T} | |
557 | // END_LATEX | |
558 | // We apply this formula 2 times. First to calculate the covariance of the tracklet | |
559 | // at point x we consider: | |
560 | // BEGIN_LATEX | |
561 | // T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}} | |
562 | // END_LATEX | |
563 | // and secondly to take into account the tilt angle | |
564 | // BEGIN_LATEX | |
565 | // T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}} | |
566 | // END_LATEX | |
567 | // | |
568 | // using simple trigonometrics one can write for this last case | |
569 | // BEGIN_LATEX | |
570 | // 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})}} | |
571 | // END_LATEX | |
572 | // which can be aproximated for small alphas (2 deg) with | |
573 | // BEGIN_LATEX | |
574 | // 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}}} | |
575 | // END_LATEX | |
576 | // | |
577 | // before applying the tilt rotation we also apply systematic uncertainties to the tracklet | |
578 | // position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might | |
579 | // account for extra misalignment/miscalibration uncertainties. | |
580 | // | |
581 | // Author : | |
582 | // Alex Bercuci <A.Bercuci@gsi.de> | |
583 | // Date : Jan 8th 2009 | |
584 | // | |
b1957d3c | 585 | |
586 | ||
d937ad7a | 587 | Double_t xr = fX0-x; |
588 | Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2]; | |
589 | Double_t sz2 = fPadLength*fPadLength/12.; | |
0906e73e | 590 | |
d937ad7a | 591 | // insert systematic uncertainties |
592 | Double_t sys[15]; | |
593 | fReconstructor->GetRecoParam()->GetSysCovMatrix(sys); | |
594 | sy2 += sys[0]; | |
595 | sz2 += sys[1]; | |
596 | ||
597 | // rotate covariance matrix | |
598 | Double_t t2 = fTilt*fTilt; | |
599 | Double_t correction = 1./(1. + t2); | |
600 | cov[0] = (sy2+t2*sz2)*correction; | |
601 | cov[1] = fTilt*(sz2 - sy2)*correction; | |
602 | cov[2] = (t2*sy2+sz2)*correction; | |
603 | } | |
eb38ed55 | 604 | |
0906e73e | 605 | |
d937ad7a | 606 | //____________________________________________________________________ |
e3cf3d02 | 607 | void AliTRDseedV1::Calibrate() |
d937ad7a | 608 | { |
e3cf3d02 | 609 | // Retrieve calibration and position parameters from OCDB. |
610 | // The following information are used | |
d937ad7a | 611 | // - detector index |
e3cf3d02 | 612 | // - column and row position of first attached cluster. If no clusters are attached |
613 | // to the tracklet a random central chamber position (c=70, r=7) will be used. | |
614 | // | |
615 | // The following information is cached in the tracklet | |
616 | // t0 (trigger delay) | |
617 | // drift velocity | |
618 | // PRF width | |
619 | // omega*tau = tg(a_L) | |
620 | // diffusion coefficients (longitudinal and transversal) | |
d937ad7a | 621 | // |
622 | // Author : | |
623 | // Alex Bercuci <A.Bercuci@gsi.de> | |
624 | // Date : Jan 8th 2009 | |
625 | // | |
eb38ed55 | 626 | |
d937ad7a | 627 | AliCDBManager *cdb = AliCDBManager::Instance(); |
628 | if(cdb->GetRun() < 0){ | |
629 | AliError("OCDB manager not properly initialized"); | |
630 | return; | |
631 | } | |
0906e73e | 632 | |
e3cf3d02 | 633 | AliTRDcalibDB *calib = AliTRDcalibDB::Instance(); |
634 | AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet), | |
635 | *t0ROC = calib->GetT0ROC(fDet);; | |
636 | const AliTRDCalDet *vdDet = calib->GetVdriftDet(); | |
637 | const AliTRDCalDet *t0Det = calib->GetT0Det(); | |
d937ad7a | 638 | |
639 | Int_t col = 70, row = 7; | |
640 | AliTRDcluster **c = &fClusters[0]; | |
e3cf3d02 | 641 | if(fN2){ |
d937ad7a | 642 | Int_t ic = 0; |
e3cf3d02 | 643 | while (ic<kNTimeBins && !(*c)){ic++; c++;} |
d937ad7a | 644 | if(*c){ |
645 | col = (*c)->GetPadCol(); | |
646 | row = (*c)->GetPadRow(); | |
647 | } | |
648 | } | |
3a039a31 | 649 | |
e3cf3d02 | 650 | fT0 = t0Det->GetValue(fDet) + t0ROC->GetValue(col,row); |
651 | fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row); | |
652 | fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF; | |
653 | fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD); | |
654 | AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL, | |
655 | fDiffT, fVD); | |
656 | SetBit(kCalib, kTRUE); | |
0906e73e | 657 | } |
658 | ||
0906e73e | 659 | //____________________________________________________________________ |
29b87567 | 660 | void AliTRDseedV1::SetOwner() |
0906e73e | 661 | { |
29b87567 | 662 | //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO")); |
663 | ||
664 | if(TestBit(kOwner)) return; | |
e3cf3d02 | 665 | for(int ic=0; ic<kNTimeBins; ic++){ |
29b87567 | 666 | if(!fClusters[ic]) continue; |
667 | fClusters[ic] = new AliTRDcluster(*fClusters[ic]); | |
668 | } | |
669 | SetBit(kOwner); | |
0906e73e | 670 | } |
671 | ||
e4f2f73d | 672 | //____________________________________________________________________ |
eb38ed55 | 673 | Bool_t AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr, AliTRDcluster *c) |
e4f2f73d | 674 | { |
675 | // | |
676 | // Iterative process to register clusters to the seed. | |
677 | // In iteration 0 we try only one pad-row and if quality not | |
678 | // sufficient we try 2 pad-rows (about 5% of tracks cross 2 pad-rows) | |
679 | // | |
29b87567 | 680 | // debug level 7 |
681 | // | |
682 | ||
683 | if(!fReconstructor->GetRecoParam() ){ | |
684 | AliError("Seed can not be used without a valid RecoParam."); | |
685 | return kFALSE; | |
686 | } | |
687 | ||
688 | AliTRDchamberTimeBin *layer = 0x0; | |
a8276d32 | 689 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7){ |
e8037fda | 690 | AliTRDtrackingChamber ch(*chamber); |
691 | ch.SetOwner(); | |
29f95561 | 692 | TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); |
693 | cstreamer << "AttachClustersIter" | |
e8037fda | 694 | << "chamber.=" << &ch |
29b87567 | 695 | << "tracklet.=" << this |
29b87567 | 696 | << "\n"; |
697 | } | |
698 | ||
35c24814 | 699 | Float_t tquality; |
29b87567 | 700 | Double_t kroady = fReconstructor->GetRecoParam() ->GetRoad1y(); |
701 | Double_t kroadz = fPadLength * .5 + 1.; | |
35c24814 | 702 | |
703 | // initialize configuration parameters | |
e3cf3d02 | 704 | Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.; |
35c24814 | 705 | Int_t niter = kZcorr ? 1 : 2; |
706 | ||
29b87567 | 707 | Double_t yexp, zexp; |
708 | Int_t ncl = 0; | |
35c24814 | 709 | // start seed update |
710 | for (Int_t iter = 0; iter < niter; iter++) { | |
29b87567 | 711 | ncl = 0; |
712 | for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) { | |
713 | if(!(layer = chamber->GetTB(iTime))) continue; | |
714 | if(!Int_t(*layer)) continue; | |
715 | ||
716 | // define searching configuration | |
717 | Double_t dxlayer = layer->GetX() - fX0; | |
718 | if(c){ | |
719 | zexp = c->GetZ(); | |
720 | //Try 2 pad-rows in second iteration | |
721 | if (iter > 0) { | |
722 | zexp = fZref[0] + fZref[1] * dxlayer - zcorr; | |
723 | if (zexp > c->GetZ()) zexp = c->GetZ() + fPadLength*0.5; | |
724 | if (zexp < c->GetZ()) zexp = c->GetZ() - fPadLength*0.5; | |
725 | } | |
726 | } else zexp = fZref[0] + (kZcorr ? fZref[1] * dxlayer : 0.); | |
35c24814 | 727 | yexp = fYref[0] + fYref[1] * dxlayer - zcorr; |
29b87567 | 728 | |
729 | // Get and register cluster | |
730 | Int_t index = layer->SearchNearestCluster(yexp, zexp, kroady, kroadz); | |
731 | if (index < 0) continue; | |
732 | AliTRDcluster *cl = (*layer)[index]; | |
35c24814 | 733 | |
29b87567 | 734 | fIndexes[iTime] = layer->GetGlobalIndex(index); |
735 | fClusters[iTime] = cl; | |
e3cf3d02 | 736 | // fY[iTime] = cl->GetY(); |
737 | // fZ[iTime] = cl->GetZ(); | |
29b87567 | 738 | ncl++; |
739 | } | |
35c24814 | 740 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d ncl [%d] = %d", iter, fDet, ncl)); |
29b87567 | 741 | |
742 | if(ncl>1){ | |
743 | // calculate length of the time bin (calibration aware) | |
e3cf3d02 | 744 | Int_t irp = 0; Float_t x[2]={0., 0.}; Int_t tb[2] = {0,0}; |
29b87567 | 745 | for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) { |
746 | if(!fClusters[iTime]) continue; | |
747 | x[irp] = fClusters[iTime]->GetX(); | |
748 | tb[irp] = iTime; | |
749 | irp++; | |
750 | if(irp==2) break; | |
751 | } | |
e3cf3d02 | 752 | Int_t dtb = tb[1] - tb[0]; |
753 | fdX = dtb ? (x[0] - x[1]) / dtb : 0.15; | |
754 | ||
29b87567 | 755 | // update X0 from the clusters (calibration/alignment aware) |
756 | for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) { | |
757 | if(!(layer = chamber->GetTB(iTime))) continue; | |
758 | if(!layer->IsT0()) continue; | |
759 | if(fClusters[iTime]){ | |
760 | fX0 = fClusters[iTime]->GetX(); | |
761 | break; | |
762 | } else { // we have to infere the position of the anode wire from the other clusters | |
763 | for (Int_t jTime = iTime+1; jTime < AliTRDtrackerV1::GetNTimeBins(); jTime++) { | |
764 | if(!fClusters[jTime]) continue; | |
765 | fX0 = fClusters[jTime]->GetX() + fdX * (jTime - iTime); | |
f660dce9 | 766 | break; |
29b87567 | 767 | } |
29b87567 | 768 | } |
769 | } | |
770 | ||
771 | // update YZ reference point | |
772 | // TODO | |
773 | ||
774 | // update x reference positions (calibration/alignment aware) | |
e3cf3d02 | 775 | // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) { |
776 | // if(!fClusters[iTime]) continue; | |
777 | // fX[iTime] = fX0 - fClusters[iTime]->GetX(); | |
778 | // } | |
29b87567 | 779 | |
e3cf3d02 | 780 | FitMI(); |
29b87567 | 781 | } |
35c24814 | 782 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d nclFit [%d] = %d", iter, fDet, fN2)); |
29b87567 | 783 | |
784 | if(IsOK()){ | |
785 | tquality = GetQuality(kZcorr); | |
786 | if(tquality < quality) break; | |
787 | else quality = tquality; | |
788 | } | |
789 | kroadz *= 2.; | |
790 | } // Loop: iter | |
791 | if (!IsOK()) return kFALSE; | |
792 | ||
804bb02e | 793 | if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=1) CookLabels(); |
d937ad7a | 794 | |
e3cf3d02 | 795 | // load calibration params |
796 | Calibrate(); | |
29b87567 | 797 | UpdateUsed(); |
798 | return kTRUE; | |
e4f2f73d | 799 | } |
800 | ||
801 | //____________________________________________________________________ | |
b1957d3c | 802 | Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt) |
e4f2f73d | 803 | { |
804 | // | |
805 | // Projective algorithm to attach clusters to seeding tracklets | |
806 | // | |
807 | // Parameters | |
808 | // | |
809 | // Output | |
810 | // | |
811 | // Detailed description | |
812 | // 1. Collapse x coordinate for the full detector plane | |
813 | // 2. truncated mean on y (r-phi) direction | |
814 | // 3. purge clusters | |
815 | // 4. truncated mean on z direction | |
816 | // 5. purge clusters | |
817 | // 6. fit tracklet | |
818 | // | |
b1957d3c | 819 | Bool_t kPRINT = kFALSE; |
29b87567 | 820 | if(!fReconstructor->GetRecoParam() ){ |
821 | AliError("Seed can not be used without a valid RecoParam."); | |
822 | return kFALSE; | |
823 | } | |
b1957d3c | 824 | // Initialize reco params for this tracklet |
825 | // 1. first time bin in the drift region | |
826 | Int_t t0 = 4; | |
827 | Int_t kClmin = Int_t(fReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins()); | |
29b87567 | 828 | |
b1957d3c | 829 | Double_t syRef = TMath::Sqrt(fRefCov[0]); |
29b87567 | 830 | //define roads |
b1957d3c | 831 | Double_t kroady = 1.; |
832 | //fReconstructor->GetRecoParam() ->GetRoad1y(); | |
29b87567 | 833 | Double_t kroadz = fPadLength * 1.5 + 1.; |
b1957d3c | 834 | if(kPRINT) printf("AttachClusters() sy[%f] road[%f]\n", syRef, kroady); |
29b87567 | 835 | |
836 | // working variables | |
b1957d3c | 837 | const Int_t kNrows = 16; |
e3cf3d02 | 838 | AliTRDcluster *clst[kNrows][kNTimeBins]; |
b1957d3c | 839 | Double_t cond[4], dx, dy, yt, zt, |
e3cf3d02 | 840 | yres[kNrows][kNTimeBins]; |
841 | Int_t idxs[kNrows][kNTimeBins], ncl[kNrows], ncls = 0; | |
b1957d3c | 842 | memset(ncl, 0, kNrows*sizeof(Int_t)); |
e3cf3d02 | 843 | memset(clst, 0, kNrows*kNTimeBins*sizeof(AliTRDcluster*)); |
b1957d3c | 844 | |
29b87567 | 845 | // Do cluster projection |
b1957d3c | 846 | AliTRDcluster *c = 0x0; |
29b87567 | 847 | AliTRDchamberTimeBin *layer = 0x0; |
b1957d3c | 848 | Bool_t kBUFFER = kFALSE; |
849 | for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) { | |
850 | if(!(layer = chamber->GetTB(it))) continue; | |
29b87567 | 851 | if(!Int_t(*layer)) continue; |
852 | ||
b1957d3c | 853 | dx = fX0 - layer->GetX(); |
854 | yt = fYref[0] - fYref[1] * dx; | |
855 | zt = fZref[0] - fZref[1] * dx; | |
856 | if(kPRINT) printf("\t%2d dx[%f] yt[%f] zt[%f]\n", it, dx, yt, zt); | |
857 | ||
858 | // select clusters on a 5 sigmaKalman level | |
859 | cond[0] = yt; cond[2] = kroady; | |
860 | cond[1] = zt; cond[3] = kroadz; | |
861 | Int_t n=0, idx[6]; | |
862 | layer->GetClusters(cond, idx, n, 6); | |
863 | for(Int_t ic = n; ic--;){ | |
864 | c = (*layer)[idx[ic]]; | |
865 | dy = yt - c->GetY(); | |
866 | dy += tilt ? fTilt * (c->GetZ() - zt) : 0.; | |
867 | // select clusters on a 3 sigmaKalman level | |
868 | /* if(tilt && TMath::Abs(dy) > 3.*syRef){ | |
869 | printf("too large !!!\n"); | |
870 | continue; | |
871 | }*/ | |
872 | Int_t r = c->GetPadRow(); | |
873 | if(kPRINT) printf("\t\t%d dy[%f] yc[%f] r[%d]\n", ic, TMath::Abs(dy), c->GetY(), r); | |
874 | clst[r][ncl[r]] = c; | |
875 | idxs[r][ncl[r]] = idx[ic]; | |
876 | yres[r][ncl[r]] = dy; | |
877 | ncl[r]++; ncls++; | |
878 | ||
e3cf3d02 | 879 | if(ncl[r] >= kNTimeBins) { |
880 | AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kNTimeBins)); | |
b1957d3c | 881 | kBUFFER = kTRUE; |
29b87567 | 882 | break; |
883 | } | |
884 | } | |
b1957d3c | 885 | if(kBUFFER) break; |
29b87567 | 886 | } |
b1957d3c | 887 | if(kPRINT) printf("Found %d clusters\n", ncls); |
888 | if(ncls<kClmin) return kFALSE; | |
889 | ||
890 | // analyze each row individualy | |
891 | Double_t mean, syDis; | |
892 | Int_t nrow[] = {0, 0, 0}, nr = 0, lr=-1; | |
893 | for(Int_t ir=kNrows; ir--;){ | |
894 | if(!(ncl[ir])) continue; | |
895 | if(lr>0 && lr-ir != 1){ | |
896 | if(kPRINT) printf("W - gap in rows attached !!\n"); | |
29b87567 | 897 | } |
b1957d3c | 898 | if(kPRINT) printf("\tir[%d] lr[%d] n[%d]\n", ir, lr, ncl[ir]); |
899 | // Evaluate truncated mean on the y direction | |
900 | if(ncl[ir] > 3) AliMathBase::EvaluateUni(ncl[ir], yres[ir], mean, syDis, Int_t(ncl[ir]*.8)); | |
901 | else { | |
902 | mean = 0.; syDis = 0.; | |
903 | } | |
904 | ||
905 | // TODO check mean and sigma agains cluster resolution !! | |
906 | if(kPRINT) printf("\tr[%2d] m[%f %5.3fsigma] s[%f]\n", ir, mean, TMath::Abs(mean/syRef), syDis); | |
907 | // select clusters on a 3 sigmaDistr level | |
908 | Bool_t kFOUND = kFALSE; | |
909 | for(Int_t ic = ncl[ir]; ic--;){ | |
910 | if(yres[ir][ic] - mean > 3. * syDis){ | |
911 | clst[ir][ic] = 0x0; continue; | |
912 | } | |
913 | nrow[nr]++; kFOUND = kTRUE; | |
914 | } | |
915 | // exit loop | |
916 | if(kFOUND) nr++; | |
917 | lr = ir; if(nr>=3) break; | |
29b87567 | 918 | } |
b1957d3c | 919 | if(kPRINT) printf("lr[%d] nr[%d] nrow[0]=%d nrow[1]=%d nrow[2]=%d\n", lr, nr, nrow[0], nrow[1], nrow[2]); |
920 | ||
921 | // classify cluster rows | |
922 | Int_t row = -1; | |
923 | switch(nr){ | |
924 | case 1: | |
925 | row = lr; | |
926 | break; | |
927 | case 2: | |
928 | SetBit(kRowCross, kTRUE); // mark pad row crossing | |
929 | if(nrow[0] > nrow[1]){ row = lr+1; lr = -1;} | |
930 | else{ | |
931 | row = lr; lr = 1; | |
932 | nrow[2] = nrow[1]; | |
933 | nrow[1] = nrow[0]; | |
934 | nrow[0] = nrow[2]; | |
29b87567 | 935 | } |
b1957d3c | 936 | break; |
937 | case 3: | |
938 | SetBit(kRowCross, kTRUE); // mark pad row crossing | |
939 | break; | |
29b87567 | 940 | } |
b1957d3c | 941 | if(kPRINT) printf("\trow[%d] n[%d]\n\n", row, nrow[0]); |
942 | if(row<0) return kFALSE; | |
29b87567 | 943 | |
b1957d3c | 944 | // Select and store clusters |
945 | // We should consider here : | |
946 | // 1. How far is the chamber boundary | |
947 | // 2. How big is the mean | |
29b87567 | 948 | fN2 = 0; |
b1957d3c | 949 | for (Int_t ir = 0; ir < nr; ir++) { |
950 | Int_t jr = row + ir*lr; | |
951 | if(kPRINT) printf("\tattach %d clusters for row %d\n", ncl[jr], jr); | |
952 | for (Int_t ic = 0; ic < ncl[jr]; ic++) { | |
953 | if(!(c = clst[jr][ic])) continue; | |
954 | Int_t it = c->GetPadTime(); | |
955 | // TODO proper indexing of clusters !! | |
e3cf3d02 | 956 | fIndexes[it+kNtb*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]); |
957 | fClusters[it+kNtb*ir] = c; | |
29b87567 | 958 | |
b1957d3c | 959 | //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]); |
960 | ||
961 | fN2++; | |
962 | } | |
963 | } | |
964 | ||
29b87567 | 965 | // number of minimum numbers of clusters expected for the tracklet |
e4f2f73d | 966 | if (fN2 < kClmin){ |
29b87567 | 967 | AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", fN2, kClmin)); |
e4f2f73d | 968 | fN2 = 0; |
969 | return kFALSE; | |
970 | } | |
0906e73e | 971 | |
b1957d3c | 972 | // update used clusters and select |
29b87567 | 973 | fNUsed = 0; |
b1957d3c | 974 | for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) { |
975 | if(fClusters[it] && fClusters[it]->IsUsed()) fNUsed++; | |
e3cf3d02 | 976 | if(fClusters[it+kNtb] && fClusters[it+kNtb]->IsUsed()) fNUsed++; |
29b87567 | 977 | } |
0906e73e | 978 | if (fN2-fNUsed < kClmin){ |
b1957d3c | 979 | //AliWarning(Form("Too many clusters already in use %d (from %d).", fNUsed, fN2)); |
0906e73e | 980 | fN2 = 0; |
981 | return kFALSE; | |
982 | } | |
b1957d3c | 983 | |
e3cf3d02 | 984 | // Load calibration parameters for this tracklet |
985 | Calibrate(); | |
b1957d3c | 986 | |
987 | // calculate dx for time bins in the drift region (calibration aware) | |
e3cf3d02 | 988 | Int_t irp = 0; Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0}; |
b1957d3c | 989 | for (Int_t it = t0; it < AliTRDtrackerV1::GetNTimeBins(); it++) { |
990 | if(!fClusters[it]) continue; | |
991 | x[irp] = fClusters[it]->GetX(); | |
992 | tb[irp] = it; | |
993 | irp++; | |
994 | if(irp==2) break; | |
e3cf3d02 | 995 | } |
d86ed84c | 996 | Int_t dtb = tb[1] - tb[0]; |
997 | fdX = dtb ? (x[0] - x[1]) / dtb : 0.15; | |
b1957d3c | 998 | |
999 | // update X0 from the clusters (calibration/alignment aware) TODO remove dependence on x0 !! | |
1000 | for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) { | |
1001 | if(!(layer = chamber->GetTB(it))) continue; | |
1002 | if(!layer->IsT0()) continue; | |
1003 | if(fClusters[it]){ | |
1004 | fX0 = fClusters[it]->GetX(); | |
1005 | break; | |
1006 | } else { // we have to infere the position of the anode wire from the other clusters | |
1007 | for (Int_t jt = it+1; jt < AliTRDtrackerV1::GetNTimeBins(); jt++) { | |
1008 | if(!fClusters[jt]) continue; | |
1009 | fX0 = fClusters[jt]->GetX() + fdX * (jt - it); | |
1010 | break; | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | ||
29b87567 | 1015 | return kTRUE; |
e4f2f73d | 1016 | } |
1017 | ||
03cef9b2 | 1018 | //____________________________________________________________ |
1019 | void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec) | |
1020 | { | |
1021 | // Fill in all derived information. It has to be called after recovery from file or HLT. | |
1022 | // The primitive data are | |
1023 | // - list of clusters | |
1024 | // - detector (as the detector will be removed from clusters) | |
1025 | // - position of anode wire (fX0) - temporary | |
1026 | // - track reference position and direction | |
1027 | // - momentum of the track | |
1028 | // - time bin length [cm] | |
1029 | // | |
1030 | // A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008 | |
1031 | // | |
1032 | fReconstructor = rec; | |
1033 | AliTRDgeometry g; | |
1034 | AliTRDpadPlane *pp = g.GetPadPlane(fDet); | |
1035 | fTilt = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle()); | |
1036 | fPadLength = pp->GetLengthIPad(); | |
e3cf3d02 | 1037 | //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]); |
1038 | //fTgl = fZref[1]; | |
1039 | fN2 = 0;// fMPads = 0.; | |
03cef9b2 | 1040 | AliTRDcluster **cit = &fClusters[0]; |
e3cf3d02 | 1041 | for(Int_t ic = kNTimeBins; ic--; cit++){ |
03cef9b2 | 1042 | if(!(*cit)) return; |
e3cf3d02 | 1043 | fN2++; |
1044 | /* fX[ic] = (*cit)->GetX() - fX0; | |
03cef9b2 | 1045 | fY[ic] = (*cit)->GetY(); |
e3cf3d02 | 1046 | fZ[ic] = (*cit)->GetZ();*/ |
03cef9b2 | 1047 | } |
e3cf3d02 | 1048 | //Update(); // |
1049 | Fit(); | |
03cef9b2 | 1050 | CookLabels(); |
1051 | GetProbability(); | |
1052 | } | |
1053 | ||
1054 | ||
e4f2f73d | 1055 | //____________________________________________________________________ |
d937ad7a | 1056 | Bool_t AliTRDseedV1::Fit(Bool_t tilt, Int_t errors) |
e4f2f73d | 1057 | { |
1058 | // | |
1059 | // Linear fit of the tracklet | |
1060 | // | |
1061 | // Parameters : | |
1062 | // | |
1063 | // Output : | |
1064 | // True if successful | |
1065 | // | |
1066 | // Detailed description | |
1067 | // 2. Check if tracklet crosses pad row boundary | |
1068 | // 1. Calculate residuals in the y (r-phi) direction | |
1069 | // 3. Do a Least Square Fit to the data | |
1070 | // | |
1071 | ||
e3cf3d02 | 1072 | if(!IsCalibrated()){ |
1073 | AliWarning("Tracklet fit failed. Call Calibrate()."); | |
1074 | return kFALSE; | |
1075 | } | |
1076 | ||
29b87567 | 1077 | const Int_t kClmin = 8; |
010d62b0 | 1078 | |
9462866a | 1079 | |
1080 | // cluster error parametrization parameters | |
010d62b0 | 1081 | // 1. sy total charge |
9462866a | 1082 | const Float_t sq0inv = 0.019962; // [1/q0] |
1083 | const Float_t sqb = 1.0281564; //[cm] | |
010d62b0 | 1084 | // 2. sy for the PRF |
1085 | const Float_t scy[AliTRDgeometry::kNlayer][4] = { | |
d937ad7a | 1086 | {2.827e-02, 9.600e-04, 4.296e-01, 2.271e-02}, |
1087 | {2.952e-02,-2.198e-04, 4.146e-01, 2.339e-02}, | |
1088 | {3.090e-02, 1.514e-03, 4.020e-01, 2.402e-02}, | |
1089 | {3.260e-02,-2.037e-03, 3.946e-01, 2.509e-02}, | |
1090 | {3.439e-02,-3.601e-04, 3.883e-01, 2.623e-02}, | |
1091 | {3.510e-02, 2.066e-03, 3.651e-01, 2.588e-02}, | |
010d62b0 | 1092 | }; |
1093 | // 3. sy parallel to the track | |
d937ad7a | 1094 | const Float_t sy0 = 2.649e-02; // [cm] |
1095 | const Float_t sya = -8.864e-04; // [cm] | |
1096 | const Float_t syb = -2.435e-01; // [cm] | |
1097 | ||
010d62b0 | 1098 | // 4. sx parallel to the track |
d937ad7a | 1099 | const Float_t sxgc = 5.427e-02; |
1100 | const Float_t sxgm = 7.783e-01; | |
1101 | const Float_t sxgs = 2.743e-01; | |
1102 | const Float_t sxe0 =-2.065e+00; | |
1103 | const Float_t sxe1 =-2.978e-02; | |
1104 | ||
010d62b0 | 1105 | // 5. sx perpendicular to the track |
d937ad7a | 1106 | // const Float_t sxd0 = 1.881e-02; |
1107 | // const Float_t sxd1 =-4.101e-01; | |
1108 | // const Float_t sxd2 = 1.572e+00; | |
1109 | ||
2f7d6ac8 | 1110 | // get track direction |
1111 | Double_t y0 = fYref[0]; | |
1112 | Double_t dydx = fYref[1]; | |
1113 | Double_t z0 = fZref[0]; | |
1114 | Double_t dzdx = fZref[1]; | |
1115 | Double_t yt, zt; | |
ae4e8b84 | 1116 | |
29b87567 | 1117 | const Int_t kNtb = AliTRDtrackerV1::GetNTimeBins(); |
e3cf3d02 | 1118 | // calculation of tg^2(phi - a_L) and tg^2(a_L) |
1119 | Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg; | |
1120 | //Double_t exb2= fExB*fExB; | |
1121 | ||
b1957d3c | 1122 | //AliTRDtrackerV1::AliTRDLeastSquare fitterZ; |
24d8660e | 1123 | TLinearFitter fitterY(1, "pol1"); |
29b87567 | 1124 | // convertion factor from square to gauss distribution for sigma |
b1957d3c | 1125 | //Double_t convert = 1./TMath::Sqrt(12.); |
ae4e8b84 | 1126 | |
29b87567 | 1127 | // book cluster information |
e3cf3d02 | 1128 | Double_t qc[kNTimeBins], xc[kNTimeBins], yc[kNTimeBins], zc[kNTimeBins], sy[kNTimeBins]; |
1129 | ||
010d62b0 | 1130 | Int_t ily = AliTRDgeometry::GetLayer(fDet); |
e3cf3d02 | 1131 | Int_t fN = 0; |
9eb2d46c | 1132 | AliTRDcluster *c=0x0, **jc = &fClusters[0]; |
9eb2d46c | 1133 | for (Int_t ic=0; ic<kNtb; ic++, ++jc) { |
b1957d3c | 1134 | //zRow[ic] = -1; |
29b87567 | 1135 | xc[ic] = -1.; |
1136 | yc[ic] = 999.; | |
1137 | zc[ic] = 999.; | |
1138 | sy[ic] = 0.; | |
b1957d3c | 1139 | //sz[ic] = 0.; |
9eb2d46c | 1140 | if(!(c = (*jc))) continue; |
29b87567 | 1141 | if(!c->IsInChamber()) continue; |
9462866a | 1142 | |
29b87567 | 1143 | Float_t w = 1.; |
1144 | if(c->GetNPads()>4) w = .5; | |
1145 | if(c->GetNPads()>5) w = .2; | |
010d62b0 | 1146 | |
b1957d3c | 1147 | //zRow[fN] = c->GetPadRow(); |
e3cf3d02 | 1148 | qc[fN] = TMath::Abs(c->GetQ()); |
d937ad7a | 1149 | // correct cluster position for PRF and v drift |
e3cf3d02 | 1150 | //Int_t jc = TMath::Max(fN-3, 0); |
1151 | //xc[fN] = c->GetXloc(fT0, fVD, &qc[jc], &xc[jc]/*, z0 - c->GetX()*dzdx*/); | |
1152 | //Double_t s2 = fS2PRF + fDiffL*fDiffL*xc[fN]/(1.+2.*exb2)+tgg*xc[fN]*xc[fN]*exb2/12.; | |
1153 | //yc[fN] = c->GetYloc(s2, fPadLength, xc[fN], fExB); | |
1154 | ||
1155 | // uncalibrated cluster correction | |
1156 | // TODO remove | |
d937ad7a | 1157 | Double_t x, y; GetClusterXY(c, x, y); |
1158 | xc[fN] = fX0 - x; | |
1159 | yc[fN] = y; | |
2f7d6ac8 | 1160 | zc[fN] = c->GetZ(); |
1161 | ||
1162 | // extrapolated y value for the track | |
1163 | yt = y0 - xc[fN]*dydx; | |
1164 | // extrapolated z value for the track | |
1165 | zt = z0 - xc[fN]*dzdx; | |
1166 | // tilt correction | |
1167 | if(tilt) yc[fN] -= fTilt*(zc[fN] - zt); | |
1168 | ||
010d62b0 | 1169 | // ELABORATE CLUSTER ERROR |
1170 | // TODO to be moved to AliTRDcluster | |
010d62b0 | 1171 | // basic y error (|| to track). |
d937ad7a | 1172 | sy[fN] = xc[fN] < AliTRDgeometry::CamHght() ? 2. : sy0 + sya*TMath::Exp(1./(xc[fN]+syb)); |
1173 | //printf("cluster[%d]\n\tsy[0] = %5.3e [um]\n", fN, sy[fN]*1.e4); | |
010d62b0 | 1174 | // y error due to total charge |
e3cf3d02 | 1175 | sy[fN] += sqb*(1./qc[fN] - sq0inv); |
d937ad7a | 1176 | //printf("\tsy[1] = %5.3e [um]\n", sy[fN]*1.e4); |
010d62b0 | 1177 | // y error due to PRF |
1178 | sy[fN] += scy[ily][0]*TMath::Gaus(c->GetCenter(), scy[ily][1], scy[ily][2]) - scy[ily][3]; | |
d937ad7a | 1179 | //printf("\tsy[2] = %5.3e [um]\n", sy[fN]*1.e4); |
1180 | ||
010d62b0 | 1181 | sy[fN] *= sy[fN]; |
1182 | ||
1183 | // ADD ERROR ON x | |
9462866a | 1184 | // error of drift length parallel to the track |
d937ad7a | 1185 | Double_t sx = sxgc*TMath::Gaus(xc[fN], sxgm, sxgs) + TMath::Exp(sxe0+sxe1*xc[fN]); // [cm] |
1186 | //printf("\tsx[0] = %5.3e [um]\n", sx*1.e4); | |
9462866a | 1187 | // error of drift length perpendicular to the track |
1188 | //sx += sxd0 + sxd1*d + sxd2*d*d; | |
d937ad7a | 1189 | sx *= sx; // square sx |
d937ad7a | 1190 | |
9462866a | 1191 | // add error from ExB |
d937ad7a | 1192 | if(errors>0) sy[fN] += fExB*fExB*sx; |
1193 | //printf("\tsy[3] = %5.3e [um^2]\n", sy[fN]*1.e8); | |
1194 | ||
1195 | // global radial error due to misalignment/miscalibration | |
1196 | Double_t sx0 = 0.; sx0 *= sx0; | |
1197 | // add sx contribution to sy due to track angle | |
1198 | if(errors>1) sy[fN] += tgg*(sx+sx0); | |
1199 | // TODO we should add tilt pad correction here | |
1200 | //printf("\tsy[4] = %5.3e [um^2]\n", sy[fN]*1.e8); | |
1201 | c->SetSigmaY2(sy[fN]); | |
1202 | ||
9462866a | 1203 | sy[fN] = TMath::Sqrt(sy[fN]); |
e3cf3d02 | 1204 | fitterY.AddPoint(&xc[fN], yc[fN], sy[fN]); |
2f7d6ac8 | 1205 | fN++; |
29b87567 | 1206 | } |
47d5d320 | 1207 | // to few clusters |
2f7d6ac8 | 1208 | if (fN < kClmin) return kFALSE; |
1209 | ||
d937ad7a | 1210 | // fit XY |
2f7d6ac8 | 1211 | fitterY.Eval(); |
d937ad7a | 1212 | fYfit[0] = fitterY.GetParameter(0); |
1213 | fYfit[1] = -fitterY.GetParameter(1); | |
1214 | // store covariance | |
1215 | Double_t *p = fitterY.GetCovarianceMatrix(); | |
1216 | fCov[0] = p[0]; // variance of y0 | |
1217 | fCov[1] = p[1]; // covariance of y0, dydx | |
1218 | fCov[2] = p[3]; // variance of dydx | |
b1957d3c | 1219 | // the ref radial position is set at the minimum of |
1220 | // the y variance of the tracklet | |
e3cf3d02 | 1221 | fX = -fCov[1]/fCov[2]; //fXref = fX0 - fXref; |
b1957d3c | 1222 | |
1223 | // fit XZ | |
1224 | if(IsRowCross()){ | |
1225 | // TODO pad row cross position estimation !!! | |
1226 | //AliInfo(Form("Padrow cross in detector %d", fDet)); | |
1227 | fZfit[0] = .5*(zc[0]+zc[fN-1]); fZfit[1] = 0.; | |
1228 | } else { | |
1229 | fZfit[0] = zc[0]; fZfit[1] = 0.; | |
29b87567 | 1230 | } |
1231 | ||
29b87567 | 1232 | |
b1957d3c | 1233 | // // determine z offset of the fit |
1234 | // Float_t zslope = 0.; | |
1235 | // Int_t nchanges = 0, nCross = 0; | |
1236 | // if(nz==2){ // tracklet is crossing pad row | |
1237 | // // Find the break time allowing one chage on pad-rows | |
1238 | // // with maximal number of accepted clusters | |
1239 | // Int_t padRef = zRow[0]; | |
1240 | // for (Int_t ic=1; ic<fN; ic++) { | |
1241 | // if(zRow[ic] == padRef) continue; | |
1242 | // | |
1243 | // // debug | |
1244 | // if(zRow[ic-1] == zRow[ic]){ | |
1245 | // printf("ERROR in pad row change!!!\n"); | |
1246 | // } | |
1247 | // | |
1248 | // // evaluate parameters of the crossing point | |
1249 | // Float_t sx = (xc[ic-1] - xc[ic])*convert; | |
1250 | // fCross[0] = .5 * (xc[ic-1] + xc[ic]); | |
1251 | // fCross[2] = .5 * (zc[ic-1] + zc[ic]); | |
1252 | // fCross[3] = TMath::Max(dzdx * sx, .01); | |
1253 | // zslope = zc[ic-1] > zc[ic] ? 1. : -1.; | |
1254 | // padRef = zRow[ic]; | |
1255 | // nCross = ic; | |
1256 | // nchanges++; | |
1257 | // } | |
1258 | // } | |
1259 | // | |
1260 | // // condition on nCross and reset nchanges TODO | |
1261 | // | |
1262 | // if(nchanges==1){ | |
1263 | // if(dzdx * zslope < 0.){ | |
1264 | // AliInfo("Tracklet-Track mismatch in dzdx. TODO."); | |
1265 | // } | |
1266 | // | |
1267 | // | |
1268 | // //zc[nc] = fitterZ.GetFunctionParameter(0); | |
1269 | // fCross[1] = fYfit[0] - fCross[0] * fYfit[1]; | |
1270 | // fCross[0] = fX0 - fCross[0]; | |
1271 | // } | |
29b87567 | 1272 | |
2389e96f | 1273 | UpdateUsed(); |
29b87567 | 1274 | return kTRUE; |
e4f2f73d | 1275 | } |
1276 | ||
e4f2f73d | 1277 | |
e3cf3d02 | 1278 | |
1279 | ||
1280 | ||
1281 | ||
1282 | //_____________________________________________________________________________ | |
1283 | void AliTRDseedV1::FitMI() | |
1284 | { | |
1285 | // | |
1286 | // Fit the seed. | |
1287 | // Marian Ivanov's version | |
1288 | // | |
1289 | // linear fit on the y direction with respect to the reference direction. | |
1290 | // The residuals for each x (x = xc - x0) are deduced from: | |
1291 | // dy = y - yt (1) | |
1292 | // the tilting correction is written : | |
1293 | // y = yc + h*(zc-zt) (2) | |
1294 | // yt = y0+dy/dx*x (3) | |
1295 | // zt = z0+dz/dx*x (4) | |
1296 | // from (1),(2),(3) and (4) | |
1297 | // dy = yc - y0 - (dy/dx + h*dz/dx)*x + h*(zc-z0) | |
1298 | // the last term introduces the correction on y direction due to tilting pads. There are 2 ways to account for this: | |
1299 | // 1. use tilting correction for calculating the y | |
1300 | // 2. neglect tilting correction here and account for it in the error parametrization of the tracklet. | |
1301 | const Float_t kRatio = 0.8; | |
1302 | const Int_t kClmin = 5; | |
1303 | const Float_t kmaxtan = 2; | |
1304 | ||
1305 | if (TMath::Abs(fYref[1]) > kmaxtan){ | |
1306 | //printf("Exit: Abs(fYref[1]) = %3.3f, kmaxtan = %3.3f\n", TMath::Abs(fYref[1]), kmaxtan); | |
1307 | return; // Track inclined too much | |
1308 | } | |
1309 | ||
1310 | Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction | |
1311 | Float_t ycrosscor = fPadLength * fTilt * 0.5; // Y correction for crossing | |
1312 | Int_t fNChange = 0; | |
1313 | ||
1314 | Double_t sumw; | |
1315 | Double_t sumwx; | |
1316 | Double_t sumwx2; | |
1317 | Double_t sumwy; | |
1318 | Double_t sumwxy; | |
1319 | Double_t sumwz; | |
1320 | Double_t sumwxz; | |
1321 | ||
1322 | // Buffering: Leave it constant fot Performance issues | |
1323 | Int_t zints[kNtb]; // Histograming of the z coordinate | |
1324 | // Get 1 and second max probable coodinates in z | |
1325 | Int_t zouts[2*kNtb]; | |
1326 | Float_t allowedz[kNtb]; // Allowed z for given time bin | |
1327 | Float_t yres[kNtb]; // Residuals from reference | |
1328 | //Float_t anglecor = fTilt * fZref[1]; // Correction to the angle | |
1329 | ||
1330 | Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t)); | |
1331 | Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb]; | |
1332 | ||
1333 | Int_t fN = 0; AliTRDcluster *c = 0x0; | |
1334 | fN2 = 0; | |
1335 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) { | |
1336 | yres[i] = 10000.0; | |
1337 | if (!(c = fClusters[i])) continue; | |
1338 | if(!c->IsInChamber()) continue; | |
1339 | // Residual y | |
1340 | //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]); | |
1341 | fX[i] = fX0 - c->GetX(); | |
1342 | fY[i] = c->GetY(); | |
1343 | fZ[i] = c->GetZ(); | |
1344 | yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1])); | |
1345 | zints[fN] = Int_t(fZ[i]); | |
1346 | fN++; | |
1347 | } | |
1348 | ||
1349 | if (fN < kClmin){ | |
1350 | //printf("Exit fN < kClmin: fN = %d\n", fN); | |
1351 | return; | |
1352 | } | |
1353 | Int_t nz = AliTRDtrackerV1::Freq(fN, zints, zouts, kFALSE); | |
1354 | Float_t fZProb = zouts[0]; | |
1355 | if (nz <= 1) zouts[3] = 0; | |
1356 | if (zouts[1] + zouts[3] < kClmin) { | |
1357 | //printf("Exit zouts[1] = %d, zouts[3] = %d\n",zouts[1],zouts[3]); | |
1358 | return; | |
1359 | } | |
1360 | ||
1361 | // Z distance bigger than pad - length | |
1362 | if (TMath::Abs(zouts[0]-zouts[2]) > 12.0) zouts[3] = 0; | |
1363 | ||
1364 | Int_t breaktime = -1; | |
1365 | Bool_t mbefore = kFALSE; | |
1366 | Int_t cumul[kNtb][2]; | |
1367 | Int_t counts[2] = { 0, 0 }; | |
1368 | ||
1369 | if (zouts[3] >= 3) { | |
1370 | ||
1371 | // | |
1372 | // Find the break time allowing one chage on pad-rows | |
1373 | // with maximal number of accepted clusters | |
1374 | // | |
1375 | fNChange = 1; | |
1376 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) { | |
1377 | cumul[i][0] = counts[0]; | |
1378 | cumul[i][1] = counts[1]; | |
1379 | if (TMath::Abs(fZ[i]-zouts[0]) < 2) counts[0]++; | |
1380 | if (TMath::Abs(fZ[i]-zouts[2]) < 2) counts[1]++; | |
1381 | } | |
1382 | Int_t maxcount = 0; | |
1383 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) { | |
1384 | Int_t after = cumul[AliTRDtrackerV1::GetNTimeBins()][0] - cumul[i][0]; | |
1385 | Int_t before = cumul[i][1]; | |
1386 | if (after + before > maxcount) { | |
1387 | maxcount = after + before; | |
1388 | breaktime = i; | |
1389 | mbefore = kFALSE; | |
1390 | } | |
1391 | after = cumul[AliTRDtrackerV1::GetNTimeBins()-1][1] - cumul[i][1]; | |
1392 | before = cumul[i][0]; | |
1393 | if (after + before > maxcount) { | |
1394 | maxcount = after + before; | |
1395 | breaktime = i; | |
1396 | mbefore = kTRUE; | |
1397 | } | |
1398 | } | |
1399 | breaktime -= 1; | |
1400 | } | |
1401 | ||
1402 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1403 | if (i > breaktime) allowedz[i] = mbefore ? zouts[2] : zouts[0]; | |
1404 | if (i <= breaktime) allowedz[i] = (!mbefore) ? zouts[2] : zouts[0]; | |
1405 | } | |
1406 | ||
1407 | if (((allowedz[0] > allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] < 0)) || | |
1408 | ((allowedz[0] < allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] > 0))) { | |
1409 | // | |
1410 | // Tracklet z-direction not in correspondance with track z direction | |
1411 | // | |
1412 | fNChange = 0; | |
1413 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1414 | allowedz[i] = zouts[0]; // Only longest taken | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | if (fNChange > 0) { | |
1419 | // | |
1420 | // Cross pad -row tracklet - take the step change into account | |
1421 | // | |
1422 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1423 | if (!fClusters[i]) continue; | |
1424 | if(!fClusters[i]->IsInChamber()) continue; | |
1425 | if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue; | |
1426 | // Residual y | |
1427 | //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] /*+ fTilt*(fZ[i] - fZref[0])*/; | |
1428 | yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1])); | |
1429 | /* if (TMath::Abs(fZ[i] - fZProb) > 2) { | |
1430 | if (fZ[i] > fZProb) yres[i] += fTilt * fPadLength; | |
1431 | if (fZ[i] < fZProb) yres[i] -= fTilt * fPadLength; | |
1432 | }*/ | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | Double_t yres2[kNtb]; | |
1437 | Double_t mean; | |
1438 | Double_t sigma; | |
1439 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1440 | if (!fClusters[i]) continue; | |
1441 | if(!fClusters[i]->IsInChamber()) continue; | |
1442 | if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue; | |
1443 | yres2[fN2] = yres[i]; | |
1444 | fN2++; | |
1445 | } | |
1446 | if (fN2 < kClmin) { | |
1447 | //printf("Exit fN2 < kClmin: fN2 = %d\n", fN2); | |
1448 | fN2 = 0; | |
1449 | return; | |
1450 | } | |
1451 | AliMathBase::EvaluateUni(fN2,yres2,mean,sigma, Int_t(fN2*kRatio-2.)); | |
1452 | if (sigma < sigmaexp * 0.8) { | |
1453 | sigma = sigmaexp; | |
1454 | } | |
1455 | //Float_t fSigmaY = sigma; | |
1456 | ||
1457 | // Reset sums | |
1458 | sumw = 0; | |
1459 | sumwx = 0; | |
1460 | sumwx2 = 0; | |
1461 | sumwy = 0; | |
1462 | sumwxy = 0; | |
1463 | sumwz = 0; | |
1464 | sumwxz = 0; | |
1465 | ||
1466 | fN2 = 0; | |
1467 | Float_t fMeanz = 0; | |
1468 | Float_t fMPads = 0; | |
1469 | fUsable = 0; | |
1470 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1471 | if (!fClusters[i]) continue; | |
1472 | if (!fClusters[i]->IsInChamber()) continue; | |
1473 | if (TMath::Abs(fZ[i] - allowedz[i]) > 2){fClusters[i] = 0x0; continue;} | |
1474 | if (TMath::Abs(yres[i] - mean) > 4.0 * sigma){fClusters[i] = 0x0; continue;} | |
1475 | SETBIT(fUsable,i); | |
1476 | fN2++; | |
1477 | fMPads += fClusters[i]->GetNPads(); | |
1478 | Float_t weight = 1.0; | |
1479 | if (fClusters[i]->GetNPads() > 4) weight = 0.5; | |
1480 | if (fClusters[i]->GetNPads() > 5) weight = 0.2; | |
1481 | ||
1482 | ||
1483 | Double_t x = fX[i]; | |
1484 | //printf("x = %7.3f dy = %7.3f fit %7.3f\n", x, yres[i], fY[i]-yres[i]); | |
1485 | ||
1486 | sumw += weight; | |
1487 | sumwx += x * weight; | |
1488 | sumwx2 += x*x * weight; | |
1489 | sumwy += weight * yres[i]; | |
1490 | sumwxy += weight * (yres[i]) * x; | |
1491 | sumwz += weight * fZ[i]; | |
1492 | sumwxz += weight * fZ[i] * x; | |
1493 | ||
1494 | } | |
1495 | ||
1496 | if (fN2 < kClmin){ | |
1497 | //printf("Exit fN2 < kClmin(2): fN2 = %d\n",fN2); | |
1498 | fN2 = 0; | |
1499 | return; | |
1500 | } | |
1501 | fMeanz = sumwz / sumw; | |
1502 | Float_t correction = 0; | |
1503 | if (fNChange > 0) { | |
1504 | // Tracklet on boundary | |
1505 | if (fMeanz < fZProb) correction = ycrosscor; | |
1506 | if (fMeanz > fZProb) correction = -ycrosscor; | |
1507 | } | |
1508 | ||
1509 | Double_t det = sumw * sumwx2 - sumwx * sumwx; | |
1510 | fYfit[0] = (sumwx2 * sumwy - sumwx * sumwxy) / det; | |
1511 | fYfit[1] = (sumw * sumwxy - sumwx * sumwy) / det; | |
1512 | ||
1513 | fS2Y = 0; | |
1514 | for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) { | |
1515 | if (!TESTBIT(fUsable,i)) continue; | |
1516 | Float_t delta = yres[i] - fYfit[0] - fYfit[1] * fX[i]; | |
1517 | fS2Y += delta*delta; | |
1518 | } | |
1519 | fS2Y = TMath::Sqrt(fS2Y / Float_t(fN2-2)); | |
1520 | // TEMPORARY UNTIL covariance properly calculated | |
1521 | fS2Y = TMath::Max(fS2Y, Float_t(.1)); | |
1522 | ||
1523 | fZfit[0] = (sumwx2 * sumwz - sumwx * sumwxz) / det; | |
1524 | fZfit[1] = (sumw * sumwxz - sumwx * sumwz) / det; | |
1525 | // fYfitR[0] += fYref[0] + correction; | |
1526 | // fYfitR[1] += fYref[1]; | |
1527 | // fYfit[0] = fYfitR[0]; | |
1528 | fYfit[1] = -fYfit[1]; | |
1529 | ||
1530 | UpdateUsed(); | |
1531 | } | |
1532 | ||
1533 | ||
e4f2f73d | 1534 | //___________________________________________________________________ |
203967fc | 1535 | void AliTRDseedV1::Print(Option_t *o) const |
e4f2f73d | 1536 | { |
1537 | // | |
1538 | // Printing the seedstatus | |
1539 | // | |
1540 | ||
203967fc | 1541 | AliInfo(Form("Det[%3d] Tilt[%+6.2f] Pad[%5.2f]", fDet, fTilt, fPadLength)); |
e3cf3d02 | 1542 | AliInfo(Form("N[%2d] Nuse[%2d]", fN2, fNUsed)); |
203967fc | 1543 | AliInfo(Form("x[%7.2f] y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fX0, fYfit[0], fZfit[0], fYfit[1], fZfit[1])); |
1544 | AliInfo(Form("Ref y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fYref[0], fZref[0], fYref[1], fZref[1])) | |
1545 | ||
1546 | ||
1547 | if(strcmp(o, "a")!=0) return; | |
1548 | ||
4dc4dc2e | 1549 | AliTRDcluster* const* jc = &fClusters[0]; |
e3cf3d02 | 1550 | for(int ic=0; ic<kNTimeBins; ic++, jc++) { |
4dc4dc2e | 1551 | if(!(*jc)) continue; |
203967fc | 1552 | (*jc)->Print(o); |
4dc4dc2e | 1553 | } |
e4f2f73d | 1554 | } |
47d5d320 | 1555 | |
203967fc | 1556 | |
1557 | //___________________________________________________________________ | |
1558 | Bool_t AliTRDseedV1::IsEqual(const TObject *o) const | |
1559 | { | |
1560 | // Checks if current instance of the class has the same essential members | |
1561 | // as the given one | |
1562 | ||
1563 | if(!o) return kFALSE; | |
1564 | const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o); | |
1565 | if(!inTracklet) return kFALSE; | |
1566 | ||
1567 | for (Int_t i = 0; i < 2; i++){ | |
e3cf3d02 | 1568 | if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE; |
1569 | if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE; | |
203967fc | 1570 | } |
1571 | ||
e3cf3d02 | 1572 | if ( fS2Y != inTracklet->fS2Y ) return kFALSE; |
1573 | if ( fTilt != inTracklet->fTilt ) return kFALSE; | |
1574 | if ( fPadLength != inTracklet->fPadLength ) return kFALSE; | |
203967fc | 1575 | |
e3cf3d02 | 1576 | for (Int_t i = 0; i < kNTimeBins; i++){ |
1577 | // if ( fX[i] != inTracklet->GetX(i) ) return kFALSE; | |
1578 | // if ( fY[i] != inTracklet->GetY(i) ) return kFALSE; | |
1579 | // if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE; | |
1580 | if ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE; | |
203967fc | 1581 | } |
e3cf3d02 | 1582 | if ( fUsable != inTracklet->fUsable ) return kFALSE; |
203967fc | 1583 | |
1584 | for (Int_t i=0; i < 2; i++){ | |
e3cf3d02 | 1585 | if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE; |
1586 | if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE; | |
1587 | if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE; | |
203967fc | 1588 | } |
1589 | ||
e3cf3d02 | 1590 | /* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE; |
1591 | if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/ | |
1592 | if ( fN2 != inTracklet->fN2 ) return kFALSE; | |
1593 | if ( fNUsed != inTracklet->fNUsed ) return kFALSE; | |
1594 | //if ( fFreq != inTracklet->GetFreq() ) return kFALSE; | |
1595 | //if ( fNChange != inTracklet->GetNChange() ) return kFALSE; | |
203967fc | 1596 | |
e3cf3d02 | 1597 | if ( fC != inTracklet->fC ) return kFALSE; |
1598 | //if ( fCC != inTracklet->GetCC() ) return kFALSE; | |
1599 | if ( fChi2 != inTracklet->fChi2 ) return kFALSE; | |
203967fc | 1600 | // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE; |
1601 | ||
e3cf3d02 | 1602 | if ( fDet != inTracklet->fDet ) return kFALSE; |
1603 | if ( fMom != inTracklet->fMom ) return kFALSE; | |
1604 | if ( fdX != inTracklet->fdX ) return kFALSE; | |
203967fc | 1605 | |
e3cf3d02 | 1606 | for (Int_t iCluster = 0; iCluster < kNTimeBins; iCluster++){ |
203967fc | 1607 | AliTRDcluster *curCluster = fClusters[iCluster]; |
e3cf3d02 | 1608 | AliTRDcluster *inCluster = inTracklet->fClusters[iCluster]; |
203967fc | 1609 | if (curCluster && inCluster){ |
1610 | if (! curCluster->IsEqual(inCluster) ) { | |
1611 | curCluster->Print(); | |
1612 | inCluster->Print(); | |
1613 | return kFALSE; | |
1614 | } | |
1615 | } else { | |
1616 | // if one cluster exists, and corresponding | |
1617 | // in other tracklet doesn't - return kFALSE | |
1618 | if(curCluster || inCluster) return kFALSE; | |
1619 | } | |
1620 | } | |
1621 | return kTRUE; | |
1622 | } |