e4f2f73d |
1 | /************************************************************************** |
29b87567 |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
3 | * * |
4 | * Author: The ALICE Off-line Project. * |
5 | * Contributors are mentioned in the code where appropriate. * |
6 | * * |
7 | * Permission to use, copy, modify and distribute this software and its * |
8 | * documentation strictly for non-commercial purposes is hereby granted * |
9 | * without fee, provided that the above copyright notice appears in all * |
10 | * copies and that both the copyright notice and this permission notice * |
11 | * appear in the supporting documentation. The authors make no claims * |
12 | * about the suitability of this software for any purpose. It is * |
13 | * provided "as is" without express or implied warranty. * |
14 | **************************************************************************/ |
e4f2f73d |
15 | |
16 | /* $Id$ */ |
17 | |
18 | //////////////////////////////////////////////////////////////////////////// |
dd8059a8 |
19 | //// |
20 | // The TRD offline tracklet |
21 | // |
22 | // The running horse of the TRD reconstruction. The following tasks are preformed: |
23 | // 1. Clusters attachment to tracks based on prior information stored at tracklet level (see AttachClusters) |
24 | // 2. Clusters position recalculation based on track information (see GetClusterXY and Fit) |
25 | // 3. Cluster error parametrization recalculation (see Fit) |
26 | // 4. Linear track approximation (Fit) |
27 | // 5. Optimal position (including z estimate for pad row cross tracklets) and covariance matrix of the track fit inside one TRD chamber (Fit) |
28 | // 6. Tilt pad correction and systematic effects (GetCovAt) |
29 | // 7. dEdx calculation (CookdEdx) |
30 | // 8. PID probabilities estimation (CookPID) |
31 | // |
e4f2f73d |
32 | // Authors: // |
33 | // Alex Bercuci <A.Bercuci@gsi.de> // |
34 | // Markus Fasel <M.Fasel@gsi.de> // |
35 | // // |
36 | //////////////////////////////////////////////////////////////////////////// |
37 | |
38 | #include "TMath.h" |
9dcc64cc |
39 | #include "TTreeStream.h" |
40 | #include "TGraphErrors.h" |
e4f2f73d |
41 | |
42 | #include "AliLog.h" |
43 | #include "AliMathBase.h" |
4ecadb52 |
44 | #include "AliRieman.h" |
d937ad7a |
45 | #include "AliCDBManager.h" |
e4f2f73d |
46 | |
4ecadb52 |
47 | #include "AliTRDReconstructor.h" |
03cef9b2 |
48 | #include "AliTRDpadPlane.h" |
9dcc64cc |
49 | #include "AliTRDtransform.h" |
e4f2f73d |
50 | #include "AliTRDcluster.h" |
f3d3af1b |
51 | #include "AliTRDseedV1.h" |
52 | #include "AliTRDtrackV1.h" |
e4f2f73d |
53 | #include "AliTRDcalibDB.h" |
eb38ed55 |
54 | #include "AliTRDchamberTimeBin.h" |
55 | #include "AliTRDtrackingChamber.h" |
56 | #include "AliTRDtrackerV1.h" |
e4f2f73d |
57 | #include "AliTRDrecoParam.h" |
a076fc2f |
58 | #include "AliTRDCommonParam.h" |
9dcc64cc |
59 | #include "AliTRDtrackletOflHelper.h" |
d937ad7a |
60 | |
9dcc64cc |
61 | #include "Cal/AliTRDCalTrkAttach.h" |
0906e73e |
62 | #include "Cal/AliTRDCalPID.h" |
d937ad7a |
63 | #include "Cal/AliTRDCalROC.h" |
64 | #include "Cal/AliTRDCalDet.h" |
e4f2f73d |
65 | |
4ecadb52 |
66 | class AliTracker; |
67 | |
e4f2f73d |
68 | ClassImp(AliTRDseedV1) |
69 | |
70 | //____________________________________________________________________ |
ae4e8b84 |
71 | AliTRDseedV1::AliTRDseedV1(Int_t det) |
3e778975 |
72 | :AliTRDtrackletBase() |
4d6aee34 |
73 | ,fkReconstructor(NULL) |
74 | ,fClusterIter(NULL) |
e3cf3d02 |
75 | ,fExB(0.) |
76 | ,fVD(0.) |
77 | ,fT0(0.) |
78 | ,fS2PRF(0.) |
79 | ,fDiffL(0.) |
80 | ,fDiffT(0.) |
ae4e8b84 |
81 | ,fClusterIdx(0) |
7c3eecb8 |
82 | ,fErrorMsg(0) |
3e778975 |
83 | ,fN(0) |
ae4e8b84 |
84 | ,fDet(det) |
b25a5e9e |
85 | ,fPt(0.) |
bcb6fb78 |
86 | ,fdX(0.) |
e3cf3d02 |
87 | ,fX0(0.) |
88 | ,fX(0.) |
89 | ,fY(0.) |
90 | ,fZ(0.) |
91 | ,fS2Y(0.) |
92 | ,fS2Z(0.) |
e3cf3d02 |
93 | ,fChi2(0.) |
e4f2f73d |
94 | { |
95 | // |
96 | // Constructor |
97 | // |
f301a656 |
98 | memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0])); |
8d2bec9e |
99 | memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*)); |
2eb10c34 |
100 | memset(fPad, 0, 4*sizeof(Float_t)); |
e3cf3d02 |
101 | fYref[0] = 0.; fYref[1] = 0.; |
102 | fZref[0] = 0.; fZref[1] = 0.; |
103 | fYfit[0] = 0.; fYfit[1] = 0.; |
104 | fZfit[0] = 0.; fZfit[1] = 0.; |
8d2bec9e |
105 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
29b87567 |
106 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
e3cf3d02 |
107 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels |
108 | fLabels[2]=0; // number of different labels for tracklet |
16cca13f |
109 | memset(fRefCov, 0, 7*sizeof(Double_t)); |
68f9b6bd |
110 | // stand alone curvature |
111 | fC[0] = 0.; fC[1] = 0.; |
d937ad7a |
112 | // covariance matrix [diagonal] |
113 | // default sy = 200um and sz = 2.3 cm |
114 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; |
f29f13a6 |
115 | SetStandAlone(kFALSE); |
e4f2f73d |
116 | } |
117 | |
118 | //____________________________________________________________________ |
0906e73e |
119 | AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref) |
3e778975 |
120 | :AliTRDtrackletBase((AliTRDtrackletBase&)ref) |
4d6aee34 |
121 | ,fkReconstructor(NULL) |
122 | ,fClusterIter(NULL) |
e3cf3d02 |
123 | ,fExB(0.) |
124 | ,fVD(0.) |
125 | ,fT0(0.) |
126 | ,fS2PRF(0.) |
127 | ,fDiffL(0.) |
128 | ,fDiffT(0.) |
ae4e8b84 |
129 | ,fClusterIdx(0) |
7c3eecb8 |
130 | ,fErrorMsg(0) |
3e778975 |
131 | ,fN(0) |
e3cf3d02 |
132 | ,fDet(-1) |
b25a5e9e |
133 | ,fPt(0.) |
e3cf3d02 |
134 | ,fdX(0.) |
135 | ,fX0(0.) |
136 | ,fX(0.) |
137 | ,fY(0.) |
138 | ,fZ(0.) |
139 | ,fS2Y(0.) |
140 | ,fS2Z(0.) |
e3cf3d02 |
141 | ,fChi2(0.) |
e4f2f73d |
142 | { |
143 | // |
144 | // Copy Constructor performing a deep copy |
145 | // |
e3cf3d02 |
146 | if(this != &ref){ |
147 | ref.Copy(*this); |
148 | } |
29b87567 |
149 | SetBit(kOwner, kFALSE); |
f29f13a6 |
150 | SetStandAlone(ref.IsStandAlone()); |
fbb2ea06 |
151 | } |
d9950a5a |
152 | |
0906e73e |
153 | |
e4f2f73d |
154 | //____________________________________________________________________ |
155 | AliTRDseedV1& AliTRDseedV1::operator=(const AliTRDseedV1 &ref) |
156 | { |
157 | // |
158 | // Assignment Operator using the copy function |
159 | // |
160 | |
29b87567 |
161 | if(this != &ref){ |
162 | ref.Copy(*this); |
163 | } |
221ab7e0 |
164 | SetBit(kOwner, kFALSE); |
165 | |
29b87567 |
166 | return *this; |
e4f2f73d |
167 | } |
168 | |
169 | //____________________________________________________________________ |
170 | AliTRDseedV1::~AliTRDseedV1() |
171 | { |
172 | // |
173 | // Destructor. The RecoParam object belongs to the underlying tracker. |
174 | // |
175 | |
29b87567 |
176 | //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO"); |
e4f2f73d |
177 | |
e3cf3d02 |
178 | if(IsOwner()) { |
8d2bec9e |
179 | for(int itb=0; itb<kNclusters; itb++){ |
29b87567 |
180 | if(!fClusters[itb]) continue; |
181 | //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb)); |
182 | delete fClusters[itb]; |
4d6aee34 |
183 | fClusters[itb] = NULL; |
29b87567 |
184 | } |
e3cf3d02 |
185 | } |
e4f2f73d |
186 | } |
187 | |
188 | //____________________________________________________________________ |
189 | void AliTRDseedV1::Copy(TObject &ref) const |
190 | { |
191 | // |
192 | // Copy function |
193 | // |
194 | |
29b87567 |
195 | //AliInfo(""); |
196 | AliTRDseedV1 &target = (AliTRDseedV1 &)ref; |
197 | |
4d6aee34 |
198 | target.fkReconstructor = fkReconstructor; |
199 | target.fClusterIter = NULL; |
e3cf3d02 |
200 | target.fExB = fExB; |
201 | target.fVD = fVD; |
202 | target.fT0 = fT0; |
203 | target.fS2PRF = fS2PRF; |
204 | target.fDiffL = fDiffL; |
205 | target.fDiffT = fDiffT; |
ae4e8b84 |
206 | target.fClusterIdx = 0; |
7c3eecb8 |
207 | target.fErrorMsg = fErrorMsg; |
3e778975 |
208 | target.fN = fN; |
ae4e8b84 |
209 | target.fDet = fDet; |
b25a5e9e |
210 | target.fPt = fPt; |
29b87567 |
211 | target.fdX = fdX; |
e3cf3d02 |
212 | target.fX0 = fX0; |
213 | target.fX = fX; |
214 | target.fY = fY; |
215 | target.fZ = fZ; |
216 | target.fS2Y = fS2Y; |
217 | target.fS2Z = fS2Z; |
e3cf3d02 |
218 | target.fChi2 = fChi2; |
29b87567 |
219 | |
8d2bec9e |
220 | memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t)); |
221 | memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*)); |
2eb10c34 |
222 | memcpy(target.fPad, fPad, 4*sizeof(Float_t)); |
e3cf3d02 |
223 | target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1]; |
224 | target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1]; |
225 | target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1]; |
226 | target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1]; |
8d2bec9e |
227 | memcpy(target.fdEdx, fdEdx, kNslices*sizeof(Float_t)); |
e3cf3d02 |
228 | memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t)); |
229 | memcpy(target.fLabels, fLabels, 3*sizeof(Int_t)); |
16cca13f |
230 | memcpy(target.fRefCov, fRefCov, 7*sizeof(Double_t)); |
68f9b6bd |
231 | target.fC[0] = fC[0]; target.fC[1] = fC[1]; |
e3cf3d02 |
232 | memcpy(target.fCov, fCov, 3*sizeof(Double_t)); |
29b87567 |
233 | |
e3cf3d02 |
234 | TObject::Copy(ref); |
e4f2f73d |
235 | } |
236 | |
0906e73e |
237 | |
4ecadb52 |
238 | //____________________________________________________________ |
239 | void AliTRDseedV1::Init(const AliRieman *rieman) |
240 | { |
241 | // Initialize this tracklet using the riemann fit information |
242 | |
243 | |
244 | fZref[0] = rieman->GetZat(fX0); |
245 | fZref[1] = rieman->GetDZat(fX0); |
246 | fYref[0] = rieman->GetYat(fX0); |
247 | fYref[1] = rieman->GetDYat(fX0); |
248 | if(fkReconstructor && fkReconstructor->IsHLT()){ |
249 | fRefCov[0] = 1; |
250 | fRefCov[2] = 10; |
251 | }else{ |
252 | fRefCov[0] = rieman->GetErrY(fX0); |
253 | fRefCov[2] = rieman->GetErrZ(fX0); |
254 | } |
255 | fC[0] = rieman->GetC(); |
256 | fChi2 = rieman->GetChi2(); |
257 | } |
258 | |
259 | |
0906e73e |
260 | //____________________________________________________________ |
f3d3af1b |
261 | Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track) |
0906e73e |
262 | { |
263 | // Initialize this tracklet using the track information |
264 | // |
265 | // Parameters: |
266 | // track - the TRD track used to initialize the tracklet |
267 | // |
268 | // Detailed description |
269 | // The function sets the starting point and direction of the |
270 | // tracklet according to the information from the TRD track. |
271 | // |
272 | // Caution |
273 | // The TRD track has to be propagated to the beginning of the |
274 | // chamber where the tracklet will be constructed |
275 | // |
276 | |
29b87567 |
277 | Double_t y, z; |
278 | if(!track->GetProlongation(fX0, y, z)) return kFALSE; |
16cca13f |
279 | Update(track); |
29b87567 |
280 | return kTRUE; |
0906e73e |
281 | } |
282 | |
bcb6fb78 |
283 | |
e3cf3d02 |
284 | //_____________________________________________________________________________ |
980d5a2a |
285 | void AliTRDseedV1::Reset(Option_t *opt) |
e3cf3d02 |
286 | { |
980d5a2a |
287 | // |
288 | // Reset seed. If option opt="c" is given only cluster arrays are cleared. |
289 | // |
290 | for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1; |
291 | memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*)); |
560e5c05 |
292 | fN=0; SetBit(kRowCross, kFALSE); |
980d5a2a |
293 | if(strcmp(opt, "c")==0) return; |
294 | |
e3cf3d02 |
295 | fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.; |
296 | fDiffL=0.;fDiffT=0.; |
3e778975 |
297 | fClusterIdx=0; |
7c3eecb8 |
298 | fErrorMsg = 0; |
dd8059a8 |
299 | fDet=-1; |
b25a5e9e |
300 | fPt=0.; |
e3cf3d02 |
301 | fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.; |
302 | fS2Y=0.; fS2Z=0.; |
68f9b6bd |
303 | fC[0]=0.; fC[1]=0.; |
304 | fChi2 = 0.; |
e3cf3d02 |
305 | |
2eb10c34 |
306 | memset(fPad, 0, 4*sizeof(Float_t)); |
e3cf3d02 |
307 | fYref[0] = 0.; fYref[1] = 0.; |
308 | fZref[0] = 0.; fZref[1] = 0.; |
309 | fYfit[0] = 0.; fYfit[1] = 0.; |
310 | fZfit[0] = 0.; fZfit[1] = 0.; |
8d2bec9e |
311 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
e3cf3d02 |
312 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.; |
313 | fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels |
314 | fLabels[2]=0; // number of different labels for tracklet |
16cca13f |
315 | memset(fRefCov, 0, 7*sizeof(Double_t)); |
e3cf3d02 |
316 | // covariance matrix [diagonal] |
317 | // default sy = 200um and sz = 2.3 cm |
318 | fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3; |
319 | } |
320 | |
b1957d3c |
321 | //____________________________________________________________________ |
16cca13f |
322 | void AliTRDseedV1::Update(const AliTRDtrackV1 *trk) |
b1957d3c |
323 | { |
324 | // update tracklet reference position from the TRD track |
b1957d3c |
325 | |
e3cf3d02 |
326 | Double_t fSnp = trk->GetSnp(); |
327 | Double_t fTgl = trk->GetTgl(); |
b25a5e9e |
328 | fPt = trk->Pt(); |
bfd20868 |
329 | Double_t norm =1./TMath::Sqrt((1.-fSnp)*(1.+fSnp)); |
1fd9389f |
330 | fYref[1] = fSnp*norm; |
331 | fZref[1] = fTgl*norm; |
b1957d3c |
332 | SetCovRef(trk->GetCovariance()); |
333 | |
334 | Double_t dx = trk->GetX() - fX0; |
335 | fYref[0] = trk->GetY() - dx*fYref[1]; |
336 | fZref[0] = trk->GetZ() - dx*fZref[1]; |
337 | } |
338 | |
e3cf3d02 |
339 | //_____________________________________________________________________________ |
340 | void AliTRDseedV1::UpdateUsed() |
341 | { |
342 | // |
f29f13a6 |
343 | // Calculate number of used clusers in the tracklet |
e3cf3d02 |
344 | // |
345 | |
3e778975 |
346 | Int_t nused = 0, nshared = 0; |
8d2bec9e |
347 | for (Int_t i = kNclusters; i--; ) { |
e3cf3d02 |
348 | if (!fClusters[i]) continue; |
3e778975 |
349 | if(fClusters[i]->IsUsed()){ |
350 | nused++; |
351 | } else if(fClusters[i]->IsShared()){ |
352 | if(IsStandAlone()) nused++; |
353 | else nshared++; |
354 | } |
e3cf3d02 |
355 | } |
3e778975 |
356 | SetNUsed(nused); |
357 | SetNShared(nshared); |
e3cf3d02 |
358 | } |
359 | |
360 | //_____________________________________________________________________________ |
361 | void AliTRDseedV1::UseClusters() |
362 | { |
363 | // |
364 | // Use clusters |
365 | // |
f29f13a6 |
366 | // In stand alone mode: |
367 | // Clusters which are marked as used or shared from another track are |
368 | // removed from the tracklet |
369 | // |
370 | // In barrel mode: |
371 | // - Clusters which are used by another track become shared |
372 | // - Clusters which are attached to a kink track become shared |
373 | // |
e3cf3d02 |
374 | AliTRDcluster **c = &fClusters[0]; |
8d2bec9e |
375 | for (Int_t ic=kNclusters; ic--; c++) { |
e3cf3d02 |
376 | if(!(*c)) continue; |
f29f13a6 |
377 | if(IsStandAlone()){ |
378 | if((*c)->IsShared() || (*c)->IsUsed()){ |
b82b4de1 |
379 | if((*c)->IsShared()) SetNShared(GetNShared()-1); |
380 | else SetNUsed(GetNUsed()-1); |
4d6aee34 |
381 | (*c) = NULL; |
f29f13a6 |
382 | fIndexes[ic] = -1; |
3e778975 |
383 | SetN(GetN()-1); |
3e778975 |
384 | continue; |
f29f13a6 |
385 | } |
3e778975 |
386 | } else { |
f29f13a6 |
387 | if((*c)->IsUsed() || IsKink()){ |
3e778975 |
388 | (*c)->SetShared(); |
389 | continue; |
f29f13a6 |
390 | } |
391 | } |
392 | (*c)->Use(); |
e3cf3d02 |
393 | } |
394 | } |
395 | |
396 | |
f29f13a6 |
397 | |
bcb6fb78 |
398 | //____________________________________________________________________ |
399 | void AliTRDseedV1::CookdEdx(Int_t nslices) |
400 | { |
401 | // Calculates average dE/dx for all slices and store them in the internal array fdEdx. |
402 | // |
403 | // Parameters: |
404 | // nslices : number of slices for which dE/dx should be calculated |
405 | // Output: |
406 | // store results in the internal array fdEdx. This can be accessed with the method |
407 | // AliTRDseedV1::GetdEdx() |
408 | // |
409 | // Detailed description |
410 | // Calculates average dE/dx for all slices. Depending on the PID methode |
411 | // the number of slices can be 3 (LQ) or 8(NN). |
3ee48d6e |
412 | // The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t)) |
bcb6fb78 |
413 | // |
414 | // The following effects are included in the calculation: |
415 | // 1. calibration values for t0 and vdrift (using x coordinate to calculate slice) |
416 | // 2. cluster sharing (optional see AliTRDrecoParam::SetClusterSharing()) |
417 | // 3. cluster size |
418 | // |
419 | |
8d2bec9e |
420 | memset(fdEdx, 0, kNslices*sizeof(Float_t)); |
e73abf77 |
421 | const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); |
29b87567 |
422 | |
0d80a563 |
423 | AliTRDcluster *c(NULL); |
424 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ |
425 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; |
426 | Float_t dx = TMath::Abs(fX0 - c->GetX()); |
427 | |
29b87567 |
428 | // Filter clusters for dE/dx calculation |
0d80a563 |
429 | |
29b87567 |
430 | // 1.consider calibration effects for slice determination |
0d80a563 |
431 | Int_t slice; |
432 | if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber() |
433 | slice = Int_t(dx * nslices / kDriftLength); |
434 | } else slice = c->GetX() < fX0 ? nslices-1 : 0; |
435 | |
e73abf77 |
436 | |
29b87567 |
437 | // 2. take sharing into account |
3e778975 |
438 | Float_t w = /*c->IsShared() ? .5 :*/ 1.; |
0d80a563 |
439 | |
29b87567 |
440 | // 3. take into account large clusters TODO |
441 | //w *= c->GetNPads() > 3 ? .8 : 1.; |
85b917f6 |
442 | |
0d80a563 |
443 | //CHECK !!! |
444 | fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic]; |
445 | } // End of loop over clusters |
bcb6fb78 |
446 | } |
447 | |
e3cf3d02 |
448 | //_____________________________________________________________________________ |
449 | void AliTRDseedV1::CookLabels() |
450 | { |
451 | // |
452 | // Cook 2 labels for seed |
453 | // |
454 | |
455 | Int_t labels[200]; |
456 | Int_t out[200]; |
457 | Int_t nlab = 0; |
8d2bec9e |
458 | for (Int_t i = 0; i < kNclusters; i++) { |
e3cf3d02 |
459 | if (!fClusters[i]) continue; |
460 | for (Int_t ilab = 0; ilab < 3; ilab++) { |
461 | if (fClusters[i]->GetLabel(ilab) >= 0) { |
462 | labels[nlab] = fClusters[i]->GetLabel(ilab); |
463 | nlab++; |
464 | } |
465 | } |
466 | } |
467 | |
fac58f00 |
468 | fLabels[2] = AliMathBase::Freq(nlab,labels,out,kTRUE); |
e3cf3d02 |
469 | fLabels[0] = out[0]; |
470 | if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2]; |
471 | } |
472 | |
2eb10c34 |
473 | //____________________________________________________________ |
474 | Float_t AliTRDseedV1::GetAnodeWireOffset(Float_t zt) |
475 | { |
4ecadb52 |
476 | // Find position inside the amplification cell for reading drift velocity map |
477 | |
2eb10c34 |
478 | Float_t d = fPad[3] - zt; |
479 | if(d<0.){ |
480 | AliError(Form("Fail AnodeWireOffset calculation z0[%+7.2f] zt[%+7.2f] d[%+7.2f].", fPad[3], zt, d)); |
481 | return 0.125; |
482 | } |
483 | d -= ((Int_t)(2 * d)) / 2.0; |
484 | if(d > 0.25) d = 0.5 - d; |
485 | return d; |
486 | } |
487 | |
e3cf3d02 |
488 | |
85b917f6 |
489 | //____________________________________________________________________ |
9dcc64cc |
490 | Float_t AliTRDseedV1::GetCharge(Bool_t useOutliers) const |
85b917f6 |
491 | { |
492 | // Computes total charge attached to tracklet. If "useOutliers" is set clusters |
493 | // which are not in chamber are also used (default false) |
494 | |
495 | AliTRDcluster *c(NULL); Float_t qt(0.); |
496 | for(int ic=0; ic<kNclusters; ic++){ |
497 | if(!(c=fClusters[ic])) continue; |
498 | if(c->IsInChamber() && !useOutliers) continue; |
499 | qt += TMath::Abs(c->GetQ()); |
500 | } |
501 | return qt; |
502 | } |
503 | |
e1bcf0af |
504 | //____________________________________________________________________ |
505 | Bool_t AliTRDseedV1::GetEstimatedCrossPoint(Float_t &x, Float_t &z) const |
506 | { |
507 | // Algorithm to estimate cross point in the x-z plane for pad row cross tracklets. |
508 | // Returns true in case of success. |
509 | if(!IsRowCross()) return kFALSE; |
510 | |
511 | x=0.; z=0.; |
512 | AliTRDcluster *c(NULL); |
513 | // Find radial range for first row |
514 | Float_t x1[] = {0., 1.e3}; |
515 | for(int ic=0; ic<kNtb; ic++){ |
516 | if(!(c=fClusters[ic])) continue; |
517 | if(!c->IsInChamber()) continue; |
518 | if(c->GetX() <= x1[1]) x1[1] = c->GetX(); |
519 | if(c->GetX() >= x1[0]) x1[0] = c->GetX(); |
520 | z=c->GetZ(); |
521 | } |
522 | if((x1[0] - x1[1])<1.e-5) return kFALSE; |
523 | |
524 | // Find radial range for second row |
525 | Bool_t kZ(kFALSE); |
526 | Float_t x2[] = {0., 1.e3}; |
527 | for(int ic=kNtb; ic<kNclusters; ic++){ |
528 | if(!(c=fClusters[ic])) continue; |
529 | if(!c->IsInChamber()) continue; |
530 | if(c->GetX() <= x2[1]) x2[1] = c->GetX(); |
531 | if(c->GetX() >= x2[0]) x2[0] = c->GetX(); |
532 | if(!kZ){ |
533 | z+=c->GetZ(); |
534 | z*=0.5; |
535 | kZ=kTRUE; |
536 | } |
537 | } |
538 | if((x2[0] - x2[1])<1.e-5) return kFALSE; |
539 | |
540 | // Find intersection of the 2 radial regions |
541 | x = 0.5*((x1[0]+x1[1] > x2[0]+x2[1]) ? (x1[1]+x2[0]) : (x1[0]+x2[1])); |
542 | return kTRUE; |
543 | } |
544 | |
9dcc64cc |
545 | //____________________________________________________________________ |
546 | Float_t AliTRDseedV1::GetdQdl() const |
547 | { |
548 | // Calculate total charge / tracklet length for 1D PID |
549 | // |
550 | Float_t Q = GetCharge(kTRUE); |
551 | return Q/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]); |
552 | } |
553 | |
bcb6fb78 |
554 | //____________________________________________________________________ |
0b433f72 |
555 | Float_t AliTRDseedV1::GetdQdl(Int_t ic, Float_t *dl) const |
bcb6fb78 |
556 | { |
3ee48d6e |
557 | // Using the linear approximation of the track inside one TRD chamber (TRD tracklet) |
558 | // the charge per unit length can be written as: |
559 | // BEGIN_LATEX |
500851ab |
560 | // #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dz}{dx}}^{2}_{ref}}} |
3ee48d6e |
561 | // END_LATEX |
562 | // where qc is the total charge collected in the current time bin and dx is the length |
0b433f72 |
563 | // of the time bin. |
564 | // The following correction are applied : |
565 | // - charge : pad row cross corrections |
566 | // [diffusion and TRF assymetry] TODO |
567 | // - dx : anisochronity, track inclination - see Fit and AliTRDcluster::GetXloc() |
568 | // and AliTRDcluster::GetYloc() for the effects taken into account |
3ee48d6e |
569 | // |
0fa1a8ee |
570 | //Begin_Html |
571 | //<img src="TRD/trackletDQDT.gif"> |
572 | //End_Html |
573 | // In the picture the energy loss measured on the tracklet as a function of drift time [left] and respectively |
574 | // drift length [right] for different particle species is displayed. |
3ee48d6e |
575 | // Author : Alex Bercuci <A.Bercuci@gsi.de> |
576 | // |
577 | Float_t dq = 0.; |
5d401b45 |
578 | // check whether both clusters are inside the chamber |
579 | Bool_t hasClusterInChamber = kFALSE; |
580 | if(fClusters[ic] && fClusters[ic]->IsInChamber()){ |
581 | hasClusterInChamber = kTRUE; |
1742f24c |
582 | dq += TMath::Abs(fClusters[ic]->GetQ()); |
b30d8c09 |
583 | } |
584 | if(fClusters[ic+kNtb] && fClusters[ic+kNtb]->IsInChamber()){ |
5d401b45 |
585 | hasClusterInChamber = kTRUE; |
586 | dq += TMath::Abs(fClusters[ic+kNtb]->GetQ()); |
1742f24c |
587 | } |
5d401b45 |
588 | if(!hasClusterInChamber) return 0.; |
0b433f72 |
589 | if(dq<1.e-3) return 0.; |
3ee48d6e |
590 | |
a2abcbc5 |
591 | Double_t dx = fdX; |
592 | if(ic-1>=0 && ic+1<kNtb){ |
593 | Float_t x2(0.), x1(0.); |
5d401b45 |
594 | // try to estimate upper radial position (find the cluster which is inside the chamber) |
595 | if(fClusters[ic-1] && fClusters[ic-1]->IsInChamber()) x2 = fClusters[ic-1]->GetX(); |
596 | else if(fClusters[ic-1+kNtb] && fClusters[ic-1+kNtb]->IsInChamber()) x2 = fClusters[ic-1+kNtb]->GetX(); |
597 | else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x2 = fClusters[ic]->GetX()+fdX; |
a2abcbc5 |
598 | else x2 = fClusters[ic+kNtb]->GetX()+fdX; |
5d401b45 |
599 | // try to estimate lower radial position (find the cluster which is inside the chamber) |
600 | if(fClusters[ic+1] && fClusters[ic+1]->IsInChamber()) x1 = fClusters[ic+1]->GetX(); |
601 | else if(fClusters[ic+1+kNtb] && fClusters[ic+1+kNtb]->IsInChamber()) x1 = fClusters[ic+1+kNtb]->GetX(); |
602 | else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x1 = fClusters[ic]->GetX()-fdX; |
a2abcbc5 |
603 | else x1 = fClusters[ic+kNtb]->GetX()-fdX; |
604 | |
605 | dx = .5*(x2 - x1); |
606 | } |
0b433f72 |
607 | dx *= TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]); |
0b433f72 |
608 | if(dl) (*dl) = dx; |
283604d2 |
609 | if(dx>1.e-9) return dq/dx; |
610 | else return 0.; |
bcb6fb78 |
611 | } |
612 | |
0b433f72 |
613 | //____________________________________________________________ |
614 | Float_t AliTRDseedV1::GetMomentum(Float_t *err) const |
615 | { |
616 | // Returns momentum of the track after update with the current tracklet as: |
617 | // BEGIN_LATEX |
618 | // p=#frac{1}{1/p_{t}} #sqrt{1+tgl^{2}} |
619 | // END_LATEX |
620 | // and optionally the momentum error (if err is not null). |
621 | // The estimated variance of the momentum is given by: |
622 | // BEGIN_LATEX |
623 | // #sigma_{p}^{2} = (#frac{dp}{dp_{t}})^{2} #sigma_{p_{t}}^{2}+(#frac{dp}{dtgl})^{2} #sigma_{tgl}^{2}+2#frac{dp}{dp_{t}}#frac{dp}{dtgl} cov(tgl,1/p_{t}) |
624 | // END_LATEX |
625 | // which can be simplified to |
626 | // BEGIN_LATEX |
627 | // #sigma_{p}^{2} = p^{2}p_{t}^{4}tgl^{2}#sigma_{tgl}^{2}-2p^{2}p_{t}^{3}tgl cov(tgl,1/p_{t})+p^{2}p_{t}^{2}#sigma_{1/p_{t}}^{2} |
628 | // END_LATEX |
629 | // |
630 | |
631 | Double_t p = fPt*TMath::Sqrt(1.+fZref[1]*fZref[1]); |
632 | Double_t p2 = p*p; |
633 | Double_t tgl2 = fZref[1]*fZref[1]; |
634 | Double_t pt2 = fPt*fPt; |
635 | if(err){ |
636 | Double_t s2 = |
637 | p2*tgl2*pt2*pt2*fRefCov[4] |
638 | -2.*p2*fZref[1]*fPt*pt2*fRefCov[5] |
639 | +p2*pt2*fRefCov[6]; |
640 | (*err) = TMath::Sqrt(s2); |
641 | } |
642 | return p; |
643 | } |
644 | |
9dcc64cc |
645 | |
b453ef55 |
646 | //____________________________________________________________________ |
647 | Float_t AliTRDseedV1::GetOccupancyTB() const |
648 | { |
649 | // Returns procentage of TB occupied by clusters |
650 | |
651 | Int_t n(0); |
652 | AliTRDcluster *c(NULL); |
653 | for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){ |
654 | if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue; |
655 | n++; |
656 | } |
657 | |
658 | return Float_t(n)/AliTRDtrackerV1::GetNTimeBins(); |
659 | } |
0b433f72 |
660 | |
0906e73e |
661 | //____________________________________________________________________ |
3e778975 |
662 | Float_t* AliTRDseedV1::GetProbability(Bool_t force) |
0906e73e |
663 | { |
3e778975 |
664 | if(!force) return &fProb[0]; |
4d6aee34 |
665 | if(!CookPID()) return NULL; |
3e778975 |
666 | return &fProb[0]; |
667 | } |
668 | |
669 | //____________________________________________________________ |
670 | Bool_t AliTRDseedV1::CookPID() |
671 | { |
0906e73e |
672 | // Fill probability array for tracklet from the DB. |
673 | // |
674 | // Parameters |
675 | // |
676 | // Output |
4d6aee34 |
677 | // returns pointer to the probability array and NULL if missing DB access |
0906e73e |
678 | // |
2a3191bb |
679 | // Retrieve PID probabilities for e+-, mu+-, K+-, pi+- and p+- from the DB according to tracklet information: |
680 | // - estimated momentum at tracklet reference point |
681 | // - dE/dx measurements |
682 | // - tracklet length |
683 | // - TRD layer |
684 | // According to the steering settings specified in the reconstruction one of the following methods are used |
685 | // - Neural Network [default] - option "nn" |
686 | // - 2D Likelihood - option "!nn" |
0906e73e |
687 | |
0906e73e |
688 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
689 | if (!calibration) { |
690 | AliError("No access to calibration data"); |
3e778975 |
691 | return kFALSE; |
0906e73e |
692 | } |
693 | |
4d6aee34 |
694 | if (!fkReconstructor) { |
3a039a31 |
695 | AliError("Reconstructor not set."); |
3e778975 |
696 | return kFALSE; |
4ba1d6ae |
697 | } |
698 | |
0906e73e |
699 | // Retrieve the CDB container class with the parametric detector response |
4d6aee34 |
700 | const AliTRDCalPID *pd = calibration->GetPIDObject(fkReconstructor->GetPIDMethod()); |
0906e73e |
701 | if (!pd) { |
702 | AliError("No access to AliTRDCalPID object"); |
3e778975 |
703 | return kFALSE; |
0906e73e |
704 | } |
10f75631 |
705 | |
29b87567 |
706 | // calculate tracklet length TO DO |
560e5c05 |
707 | Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())/ TMath::Sqrt((1.0 - GetSnp()*GetSnp()) / (1.0 + GetTgl()*GetTgl())); |
0906e73e |
708 | |
709 | //calculate dE/dx |
9ded305e |
710 | CookdEdx(AliTRDCalPID::kNSlicesNN); |
711 | AliDebug(4, Form("p=%6.4f[GeV/c] dEdx{%7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f} l=%4.2f[cm]", GetMomentum(), fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7], length)); |
0217fcd0 |
712 | |
0906e73e |
713 | // Sets the a priori probabilities |
11d80e40 |
714 | Bool_t kPIDNN(fkReconstructor->GetPIDMethod()==AliTRDpidUtil::kNN); |
f83cd814 |
715 | for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) |
11d80e40 |
716 | fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, kPIDNN?GetPlane():fkReconstructor->GetRecoParam()->GetPIDLQslices()); |
f301a656 |
717 | |
3e778975 |
718 | return kTRUE; |
0906e73e |
719 | } |
720 | |
e4f2f73d |
721 | //____________________________________________________________________ |
722 | Float_t AliTRDseedV1::GetQuality(Bool_t kZcorr) const |
723 | { |
724 | // |
725 | // Returns a quality measurement of the current seed |
726 | // |
727 | |
dd8059a8 |
728 | Float_t zcorr = kZcorr ? GetTilt() * (fZfit[0] - fZref[0]) : 0.; |
29b87567 |
729 | return |
3e778975 |
730 | .5 * TMath::Abs(18.0 - GetN()) |
29b87567 |
731 | + 10.* TMath::Abs(fYfit[1] - fYref[1]) |
732 | + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr) |
dd8059a8 |
733 | + 2. * TMath::Abs(fZfit[0] - fZref[0]) / GetPadLength(); |
e4f2f73d |
734 | } |
735 | |
0906e73e |
736 | //____________________________________________________________________ |
d937ad7a |
737 | void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const |
0906e73e |
738 | { |
d937ad7a |
739 | // Computes covariance in the y-z plane at radial point x (in tracking coordinates) |
740 | // and returns the results in the preallocated array cov[3] as : |
741 | // cov[0] = Var(y) |
742 | // cov[1] = Cov(yz) |
743 | // cov[2] = Var(z) |
744 | // |
745 | // Details |
746 | // |
747 | // For the linear transformation |
748 | // BEGIN_LATEX |
749 | // Y = T_{x} X^{T} |
750 | // END_LATEX |
751 | // The error propagation has the general form |
752 | // BEGIN_LATEX |
753 | // C_{Y} = T_{x} C_{X} T_{x}^{T} |
754 | // END_LATEX |
755 | // We apply this formula 2 times. First to calculate the covariance of the tracklet |
756 | // at point x we consider: |
757 | // BEGIN_LATEX |
758 | // T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}} |
759 | // END_LATEX |
760 | // and secondly to take into account the tilt angle |
761 | // BEGIN_LATEX |
762 | // T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}} |
763 | // END_LATEX |
764 | // |
765 | // using simple trigonometrics one can write for this last case |
766 | // BEGIN_LATEX |
767 | // C_{Y}=#frac{1}{1+tg^{2}#alpha} #(){#splitline{(#sigma_{y}^{2}+tg^{2}#alpha#sigma_{z}^{2}) __ tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2})}{tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2}) __ (#sigma_{z}^{2}+tg^{2}#alpha#sigma_{y}^{2})}} |
768 | // END_LATEX |
769 | // which can be aproximated for small alphas (2 deg) with |
770 | // BEGIN_LATEX |
771 | // C_{Y}=#(){#splitline{#sigma_{y}^{2} __ (#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha}{((#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha __ #sigma_{z}^{2}}} |
772 | // END_LATEX |
773 | // |
774 | // before applying the tilt rotation we also apply systematic uncertainties to the tracklet |
775 | // position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might |
776 | // account for extra misalignment/miscalibration uncertainties. |
777 | // |
778 | // Author : |
779 | // Alex Bercuci <A.Bercuci@gsi.de> |
780 | // Date : Jan 8th 2009 |
781 | // |
b1957d3c |
782 | |
783 | |
d937ad7a |
784 | Double_t xr = fX0-x; |
785 | Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2]; |
b72f4eaf |
786 | Double_t sz2 = fS2Z; |
787 | //GetPadLength()*GetPadLength()/12.; |
0906e73e |
788 | |
d937ad7a |
789 | // insert systematic uncertainties |
4d6aee34 |
790 | if(fkReconstructor){ |
bb2db46c |
791 | Double_t sys[15]; memset(sys, 0, 15*sizeof(Double_t)); |
4d6aee34 |
792 | fkReconstructor->GetRecoParam()->GetSysCovMatrix(sys); |
bb2db46c |
793 | sy2 += sys[0]; |
794 | sz2 += sys[1]; |
795 | } |
2eb10c34 |
796 | |
797 | // rotate covariance matrix if no RC |
798 | if(!IsRowCross()){ |
799 | Double_t t2 = GetTilt()*GetTilt(); |
800 | Double_t correction = 1./(1. + t2); |
801 | cov[0] = (sy2+t2*sz2)*correction; |
802 | cov[1] = GetTilt()*(sz2 - sy2)*correction; |
803 | cov[2] = (t2*sy2+sz2)*correction; |
804 | } else { |
805 | cov[0] = sy2; cov[1] = 0.; cov[2] = sy2; |
806 | } |
807 | |
808 | AliDebug(4, Form("C(%6.1f %+6.3f %6.1f) RC[%c]", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?'y':'n')); |
d937ad7a |
809 | } |
eb38ed55 |
810 | |
bb2db46c |
811 | //____________________________________________________________ |
66765e8e |
812 | Int_t AliTRDseedV1::GetCovSqrt(const Double_t * const c, Double_t *d) |
bb2db46c |
813 | { |
814 | // Helper function to calculate the square root of the covariance matrix. |
815 | // The input matrix is stored in the vector c and the result in the vector d. |
41b7c7b6 |
816 | // Both arrays have to be initialized by the user with at least 3 elements. Return negative in case of failure. |
bb2db46c |
817 | // |
ec3f0161 |
818 | // For calculating the square root of the symmetric matrix c |
819 | // the following relation is used: |
bb2db46c |
820 | // BEGIN_LATEX |
ec3f0161 |
821 | // C^{1/2} = VD^{1/2}V^{-1} |
bb2db46c |
822 | // END_LATEX |
41b7c7b6 |
823 | // with V being the matrix with the n eigenvectors as columns. |
ec3f0161 |
824 | // In case C is symmetric the followings are true: |
825 | // - matrix D is diagonal with the diagonal given by the eigenvalues of C |
41b7c7b6 |
826 | // - V = V^{-1} |
bb2db46c |
827 | // |
828 | // Author A.Bercuci <A.Bercuci@gsi.de> |
829 | // Date Mar 19 2009 |
830 | |
66765e8e |
831 | const Double_t kZero(1.e-20); |
4d6aee34 |
832 | Double_t l[2], // eigenvalues |
833 | v[3]; // eigenvectors |
bb2db46c |
834 | // the secular equation and its solution : |
835 | // (c[0]-L)(c[2]-L)-c[1]^2 = 0 |
836 | // L^2 - L*Tr(c)+DET(c) = 0 |
837 | // L12 = [Tr(c) +- sqrt(Tr(c)^2-4*DET(c))]/2 |
4d6aee34 |
838 | Double_t tr = c[0]+c[2], // trace |
839 | det = c[0]*c[2]-c[1]*c[1]; // determinant |
66765e8e |
840 | if(TMath::Abs(det)<kZero) return 1; |
4d6aee34 |
841 | Double_t dd = TMath::Sqrt(tr*tr - 4*det); |
66765e8e |
842 | l[0] = .5*(tr + dd*(c[0]>c[2]?-1.:1.)); |
843 | l[1] = .5*(tr + dd*(c[0]>c[2]?1.:-1.)); |
844 | if(l[0]<kZero || l[1]<kZero) return 2; |
41b7c7b6 |
845 | // the sym V matrix |
846 | // | v00 v10| |
847 | // | v10 v11| |
66765e8e |
848 | Double_t den = (l[0]-c[0])*(l[0]-c[0])+c[1]*c[1]; |
849 | if(den<kZero){ // almost diagonal |
850 | v[0] = TMath::Sign(0., c[1]); |
851 | v[1] = TMath::Sign(1., (l[0]-c[0])); |
852 | v[2] = TMath::Sign(0., c[1]*(l[0]-c[0])*(l[1]-c[2])); |
853 | } else { |
854 | Double_t tmp = 1./TMath::Sqrt(den); |
855 | v[0] = c[1]* tmp; |
856 | v[1] = (l[0]-c[0])*tmp; |
857 | if(TMath::Abs(l[1]-c[2])<kZero) v[2] = TMath::Sign(v[0]*(l[0]-c[0])/kZero, (l[1]-c[2])); |
858 | else v[2] = v[0]*(l[0]-c[0])/(l[1]-c[2]); |
859 | } |
41b7c7b6 |
860 | // the VD^{1/2}V is: |
4d6aee34 |
861 | l[0] = TMath::Sqrt(l[0]); l[1] = TMath::Sqrt(l[1]); |
862 | d[0] = v[0]*v[0]*l[0]+v[1]*v[1]*l[1]; |
863 | d[1] = v[0]*v[1]*l[0]+v[1]*v[2]*l[1]; |
864 | d[2] = v[1]*v[1]*l[0]+v[2]*v[2]*l[1]; |
bb2db46c |
865 | |
66765e8e |
866 | return 0; |
bb2db46c |
867 | } |
868 | |
869 | //____________________________________________________________ |
4d6aee34 |
870 | Double_t AliTRDseedV1::GetCovInv(const Double_t * const c, Double_t *d) |
bb2db46c |
871 | { |
872 | // Helper function to calculate the inverse of the covariance matrix. |
873 | // The input matrix is stored in the vector c and the result in the vector d. |
874 | // Both arrays have to be initialized by the user with at least 3 elements |
875 | // The return value is the determinant or 0 in case of singularity. |
876 | // |
877 | // Author A.Bercuci <A.Bercuci@gsi.de> |
878 | // Date Mar 19 2009 |
879 | |
4d6aee34 |
880 | Double_t det = c[0]*c[2] - c[1]*c[1]; |
881 | if(TMath::Abs(det)<1.e-20) return 0.; |
882 | Double_t invDet = 1./det; |
883 | d[0] = c[2]*invDet; |
884 | d[1] =-c[1]*invDet; |
885 | d[2] = c[0]*invDet; |
886 | return det; |
bb2db46c |
887 | } |
0906e73e |
888 | |
b72f4eaf |
889 | //____________________________________________________________________ |
890 | UShort_t AliTRDseedV1::GetVolumeId() const |
891 | { |
4ecadb52 |
892 | // Returns geometry volume id by delegation |
893 | |
fbe11be7 |
894 | for(Int_t ic(0);ic<kNclusters; ic++){ |
895 | if(fClusters[ic]) return fClusters[ic]->GetVolumeId(); |
896 | } |
897 | return 0; |
b72f4eaf |
898 | } |
899 | |
900 | |
d937ad7a |
901 | //____________________________________________________________________ |
e3cf3d02 |
902 | void AliTRDseedV1::Calibrate() |
d937ad7a |
903 | { |
e3cf3d02 |
904 | // Retrieve calibration and position parameters from OCDB. |
905 | // The following information are used |
d937ad7a |
906 | // - detector index |
e3cf3d02 |
907 | // - column and row position of first attached cluster. If no clusters are attached |
908 | // to the tracklet a random central chamber position (c=70, r=7) will be used. |
909 | // |
910 | // The following information is cached in the tracklet |
911 | // t0 (trigger delay) |
912 | // drift velocity |
913 | // PRF width |
914 | // omega*tau = tg(a_L) |
915 | // diffusion coefficients (longitudinal and transversal) |
d937ad7a |
916 | // |
917 | // Author : |
918 | // Alex Bercuci <A.Bercuci@gsi.de> |
919 | // Date : Jan 8th 2009 |
920 | // |
eb38ed55 |
921 | |
d937ad7a |
922 | AliCDBManager *cdb = AliCDBManager::Instance(); |
923 | if(cdb->GetRun() < 0){ |
924 | AliError("OCDB manager not properly initialized"); |
925 | return; |
926 | } |
0906e73e |
927 | |
e3cf3d02 |
928 | AliTRDcalibDB *calib = AliTRDcalibDB::Instance(); |
929 | AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet), |
930 | *t0ROC = calib->GetT0ROC(fDet);; |
931 | const AliTRDCalDet *vdDet = calib->GetVdriftDet(); |
932 | const AliTRDCalDet *t0Det = calib->GetT0Det(); |
d937ad7a |
933 | |
934 | Int_t col = 70, row = 7; |
935 | AliTRDcluster **c = &fClusters[0]; |
3e778975 |
936 | if(GetN()){ |
d937ad7a |
937 | Int_t ic = 0; |
8d2bec9e |
938 | while (ic<kNclusters && !(*c)){ic++; c++;} |
d937ad7a |
939 | if(*c){ |
940 | col = (*c)->GetPadCol(); |
941 | row = (*c)->GetPadRow(); |
942 | } |
943 | } |
3a039a31 |
944 | |
e17f4785 |
945 | fT0 = (t0Det->GetValue(fDet) + t0ROC->GetValue(col,row)) / AliTRDCommonParam::Instance()->GetSamplingFrequency(); |
e3cf3d02 |
946 | fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row); |
947 | fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF; |
948 | fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD); |
949 | AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL, |
950 | fDiffT, fVD); |
903326c1 |
951 | AliDebug(4, Form("Calibration params for Det[%3d] Col[%3d] Row[%2d]\n t0[%f] vd[%f] s2PRF[%f] ExB[%f] Dl[%f] Dt[%f]", fDet, col, row, fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT)); |
952 | |
953 | |
e3cf3d02 |
954 | SetBit(kCalib, kTRUE); |
0906e73e |
955 | } |
956 | |
0906e73e |
957 | //____________________________________________________________________ |
29b87567 |
958 | void AliTRDseedV1::SetOwner() |
0906e73e |
959 | { |
29b87567 |
960 | //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO")); |
961 | |
962 | if(TestBit(kOwner)) return; |
8d2bec9e |
963 | for(int ic=0; ic<kNclusters; ic++){ |
29b87567 |
964 | if(!fClusters[ic]) continue; |
965 | fClusters[ic] = new AliTRDcluster(*fClusters[ic]); |
966 | } |
967 | SetBit(kOwner); |
0906e73e |
968 | } |
969 | |
eb2b4f91 |
970 | //____________________________________________________________ |
4ecadb52 |
971 | void AliTRDseedV1::SetPadPlane(AliTRDpadPlane * const p) |
eb2b4f91 |
972 | { |
973 | // Shortcut method to initialize pad geometry. |
2eb10c34 |
974 | fPad[0] = p->GetLengthIPad(); |
975 | fPad[1] = p->GetWidthIPad(); |
976 | fPad[2] = TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle()); |
977 | fPad[3] = p->GetRow0() + p->GetAnodeWireOffset(); |
eb2b4f91 |
978 | } |
979 | |
980 | |
9dcc64cc |
981 | |
e4f2f73d |
982 | //____________________________________________________________________ |
9dcc64cc |
983 | Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt, Bool_t chgPos, Int_t ev) |
e4f2f73d |
984 | { |
1fd9389f |
985 | // |
986 | // Projective algorithm to attach clusters to seeding tracklets. The following steps are performed : |
987 | // 1. Collapse x coordinate for the full detector plane |
988 | // 2. truncated mean on y (r-phi) direction |
989 | // 3. purge clusters |
990 | // 4. truncated mean on z direction |
991 | // 5. purge clusters |
992 | // |
993 | // Parameters |
994 | // - chamber : pointer to tracking chamber container used to search the tracklet |
995 | // - tilt : switch for tilt correction during road building [default true] |
996 | // Output |
997 | // - true : if tracklet found successfully. Failure can happend because of the following: |
998 | // - |
999 | // Detailed description |
9dcc64cc |
1000 | // |
1fd9389f |
1001 | // We start up by defining the track direction in the xy plane and roads. The roads are calculated based |
8a7ff53c |
1002 | // on tracking information (variance in the r-phi direction) and estimated variance of the standard |
1003 | // clusters (see AliTRDcluster::SetSigmaY2()) corrected for tilt (see GetCovAt()). From this the road is |
1004 | // BEGIN_LATEX |
500851ab |
1005 | // r_{y} = 3*#sqrt{12*(#sigma^{2}_{Trk}(y) + #frac{#sigma^{2}_{cl}(y) + tg^{2}(#alpha_{L})#sigma^{2}_{cl}(z)}{1+tg^{2}(#alpha_{L})})} |
8a7ff53c |
1006 | // r_{z} = 1.5*L_{pad} |
1007 | // END_LATEX |
1fd9389f |
1008 | // |
4b755889 |
1009 | // Author : Alexandru Bercuci <A.Bercuci@gsi.de> |
9dcc64cc |
1010 | // Debug : level = 2 for calibration |
1011 | // level = 3 for visualization in the track SR |
1012 | // level = 4 for full visualization including digit level |
1fd9389f |
1013 | |
fc0882f3 |
1014 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it |
1015 | |
1016 | if(!recoParam){ |
560e5c05 |
1017 | AliError("Tracklets can not be used without a valid RecoParam."); |
29b87567 |
1018 | return kFALSE; |
1019 | } |
9dcc64cc |
1020 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
1021 | if (!calibration) { |
1022 | AliError("No access to calibration data"); |
1023 | return kFALSE; |
1024 | } |
1025 | // Retrieve the CDB container class with the parametric likelihood |
1026 | const AliTRDCalTrkAttach *attach = calibration->GetAttachObject(); |
1027 | if (!attach) { |
1028 | AliError("No usable AttachClusters calib object."); |
1029 | return kFALSE; |
1030 | } |
1031 | |
b1957d3c |
1032 | // Initialize reco params for this tracklet |
1033 | // 1. first time bin in the drift region |
a2abcbc5 |
1034 | Int_t t0 = 14; |
fc0882f3 |
1035 | Int_t kClmin = Int_t(recoParam->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins()); |
9dcc64cc |
1036 | Int_t kTBmin = 4; |
29b87567 |
1037 | |
9dcc64cc |
1038 | Double_t sysCov[5]; recoParam->GetSysCovMatrix(sysCov); |
8a7ff53c |
1039 | Double_t s2yTrk= fRefCov[0], |
1040 | s2yCl = 0., |
1041 | s2zCl = GetPadLength()*GetPadLength()/12., |
1042 | syRef = TMath::Sqrt(s2yTrk), |
1043 | t2 = GetTilt()*GetTilt(); |
29b87567 |
1044 | //define roads |
9dcc64cc |
1045 | const Double_t kroady = 3.; //recoParam->GetRoad1y(); |
1046 | const Double_t kroadz = GetPadLength() * recoParam->GetRoadzMultiplicator() + 1.; |
8a7ff53c |
1047 | // define probing cluster (the perfect cluster) and default calibration |
1048 | Short_t sig[] = {0, 0, 10, 30, 10, 0,0}; |
1049 | AliTRDcluster cp(fDet, 6, 75, 0, sig, 0); |
560e5c05 |
1050 | if(fkReconstructor->IsHLT()) cp.SetRPhiMethod(AliTRDcluster::kCOG); |
1051 | if(!IsCalibrated()) Calibrate(); |
8a7ff53c |
1052 | |
9dcc64cc |
1053 | Int_t kroadyShift(0); |
1054 | Float_t bz(AliTrackerBase::GetBz()); |
1055 | if(TMath::Abs(bz)>2.){ |
1056 | if(bz<0.) kroadyShift = chgPos ? +1 : -1; |
1057 | else kroadyShift = chgPos ? -1 : +1; |
1058 | } |
1059 | AliDebug(4, Form("\n syTrk[cm]=%4.2f dydxTrk[deg]=%+6.2f rs[%d] Chg[%c] rY[cm]=%4.2f rZ[cm]=%5.2f TC[%c]", syRef, TMath::ATan(fYref[1])*TMath::RadToDeg(), kroadyShift, chgPos?'+':'-', kroady, kroadz, tilt?'y':'n')); |
1060 | Double_t phiTrk(TMath::ATan(fYref[1])), |
1061 | thtTrk(TMath::ATan(fZref[1])); |
29b87567 |
1062 | |
1063 | // working variables |
b1957d3c |
1064 | const Int_t kNrows = 16; |
4b755889 |
1065 | const Int_t kNcls = 3*kNclusters; // buffer size |
9dcc64cc |
1066 | TObjArray clst[kNrows]; |
3044dfe5 |
1067 | Bool_t blst[kNrows][kNcls]; |
9dcc64cc |
1068 | Double_t cond[4], |
1069 | dx, dy, dz, |
1070 | yt, zt, |
1071 | zc[kNrows], |
1072 | xres[kNrows][kNcls], yres[kNrows][kNcls], zres[kNrows][kNcls], s2y[kNrows][kNcls]; |
4b755889 |
1073 | Int_t idxs[kNrows][kNcls], ncl[kNrows], ncls = 0; |
b1957d3c |
1074 | memset(ncl, 0, kNrows*sizeof(Int_t)); |
9dcc64cc |
1075 | memset(zc, 0, kNrows*sizeof(Double_t)); |
1076 | memset(idxs, 0, kNrows*kNcls*sizeof(Int_t)); |
1077 | memset(xres, 0, kNrows*kNcls*sizeof(Double_t)); |
4b755889 |
1078 | memset(yres, 0, kNrows*kNcls*sizeof(Double_t)); |
9dcc64cc |
1079 | memset(zres, 0, kNrows*kNcls*sizeof(Double_t)); |
1080 | memset(s2y, 0, kNrows*kNcls*sizeof(Double_t)); |
3044dfe5 |
1081 | memset(blst, 0, kNrows*kNcls*sizeof(Bool_t)); //this is 8 times faster to memset than "memset(clst, 0, kNrows*kNcls*sizeof(AliTRDcluster*))" |
b1957d3c |
1082 | |
9dcc64cc |
1083 | Double_t roady(0.), s2Mean(0.), sMean(0.); Int_t ns2Mean(0); |
1084 | |
1085 | // Do cluster projection and pick up cluster candidates |
1086 | AliTRDcluster *c(NULL); |
1087 | AliTRDchamberTimeBin *layer(NULL); |
b1957d3c |
1088 | Bool_t kBUFFER = kFALSE; |
4b755889 |
1089 | for (Int_t it = 0; it < kNtb; it++) { |
b1957d3c |
1090 | if(!(layer = chamber->GetTB(it))) continue; |
29b87567 |
1091 | if(!Int_t(*layer)) continue; |
8a7ff53c |
1092 | // get track projection at layers position |
b1957d3c |
1093 | dx = fX0 - layer->GetX(); |
1094 | yt = fYref[0] - fYref[1] * dx; |
1095 | zt = fZref[0] - fZref[1] * dx; |
9dcc64cc |
1096 | // get standard cluster error corrected for tilt if selected |
8a7ff53c |
1097 | cp.SetLocalTimeBin(it); |
1098 | cp.SetSigmaY2(0.02, fDiffT, fExB, dx, -1./*zt*/, fYref[1]); |
9dcc64cc |
1099 | s2yCl = cp.GetSigmaY2() + sysCov[0]; if(!tilt) s2yCl = (s2yCl + t2*s2zCl)/(1.+t2); |
1100 | if(TMath::Abs(it-12)<7){ s2Mean += cp.GetSigmaY2(); ns2Mean++;} |
1101 | // get estimated road in r-phi direction |
1102 | roady = TMath::Min(3.*TMath::Sqrt(12.*(s2yTrk + s2yCl)), kroady); |
1103 | |
1104 | AliDebug(5, Form("\n" |
1105 | " %2d xd[cm]=%6.3f yt[cm]=%7.2f zt[cm]=%8.2f\n" |
1106 | " syTrk[um]=%6.2f syCl[um]=%6.2f syClTlt[um]=%6.2f\n" |
1107 | " Ry[mm]=%f" |
1108 | , it, dx, yt, zt |
1109 | , 1.e4*TMath::Sqrt(s2yTrk), 1.e4*TMath::Sqrt(cp.GetSigmaY2()+sysCov[0]), 1.e4*TMath::Sqrt(s2yCl) |
1110 | , 1.e1*roady)); |
1111 | |
1112 | // get clusters from layer |
1113 | cond[0] = yt/*+0.5*kroadyShift*kroady*/; cond[2] = roady; |
b1957d3c |
1114 | cond[1] = zt; cond[3] = kroadz; |
9dcc64cc |
1115 | Int_t n=0, idx[6]; layer->GetClusters(cond, idx, n, 6); |
b1957d3c |
1116 | for(Int_t ic = n; ic--;){ |
1117 | c = (*layer)[idx[ic]]; |
9dcc64cc |
1118 | dx = fX0 - c->GetX(); |
1119 | yt = fYref[0] - fYref[1] * dx; |
1120 | zt = fZref[0] - fZref[1] * dx; |
1121 | dz = zt - c->GetZ(); |
1122 | dy = yt - (c->GetY() + (tilt ? (GetTilt() * dz) : 0.)); |
b1957d3c |
1123 | Int_t r = c->GetPadRow(); |
9dcc64cc |
1124 | clst[r].AddAtAndExpand(c, ncl[r]); |
3044dfe5 |
1125 | blst[r][ncl[r]] = kTRUE; |
b1957d3c |
1126 | idxs[r][ncl[r]] = idx[ic]; |
9dcc64cc |
1127 | zres[r][ncl[r]] = dz/GetPadLength(); |
b1957d3c |
1128 | yres[r][ncl[r]] = dy; |
9dcc64cc |
1129 | xres[r][ncl[r]] = dx; |
1130 | zc[r] = c->GetZ(); |
1131 | // TODO temporary solution to avoid divercences in error parametrization |
1132 | s2y[r][ncl[r]] = TMath::Min(c->GetSigmaY2()+sysCov[0], 0.025); |
1133 | AliDebug(5, Form(" -> dy[cm]=%+7.4f yc[cm]=%7.2f row[%d] idx[%2d]", dy, c->GetY(), r, ncl[r])); |
b1957d3c |
1134 | ncl[r]++; ncls++; |
1135 | |
4b755889 |
1136 | if(ncl[r] >= kNcls) { |
560e5c05 |
1137 | AliWarning(Form("Cluster candidates row[%d] reached buffer limit[%d]. Some may be lost.", r, kNcls)); |
b1957d3c |
1138 | kBUFFER = kTRUE; |
29b87567 |
1139 | break; |
1140 | } |
1141 | } |
b1957d3c |
1142 | if(kBUFFER) break; |
29b87567 |
1143 | } |
ee8fb199 |
1144 | if(ncls<kClmin){ |
560e5c05 |
1145 | AliDebug(1, Form("CLUSTERS FOUND %d LESS THAN THRESHOLD %d.", ncls, kClmin)); |
7c3eecb8 |
1146 | SetErrorMsg(kAttachClFound); |
9dcc64cc |
1147 | for(Int_t ir(kNrows);ir--;) clst[ir].Clear(); |
ee8fb199 |
1148 | return kFALSE; |
1149 | } |
9dcc64cc |
1150 | if(ns2Mean<kTBmin){ |
1151 | AliDebug(1, Form("CLUSTERS IN TimeBins %d LESS THAN THRESHOLD %d.", ns2Mean, kTBmin)); |
1152 | SetErrorMsg(kAttachClFound); |
1153 | for(Int_t ir(kNrows);ir--;) clst[ir].Clear(); |
1154 | return kFALSE; |
1155 | } |
1156 | s2Mean /= ns2Mean; sMean = TMath::Sqrt(s2Mean); |
1157 | //Double_t sRef(TMath::Sqrt(s2Mean+s2yTrk)); // reference error parameterization |
1158 | |
1159 | // organize row candidates |
1160 | Int_t idxRow[kNrows], nrc(0); Double_t zresRow[kNrows]; |
1161 | for(Int_t ir(0); ir<kNrows; ir++){ |
1162 | idxRow[ir]=-1; zresRow[ir] = 999.; |
1163 | if(!ncl[ir]) continue; |
1164 | // get mean z resolution |
1165 | dz = 0.; for(Int_t ic = ncl[ir]; ic--;) dz += zres[ir][ic]; dz/=ncl[ir]; |
1166 | // insert row |
1167 | idxRow[nrc] = ir; zresRow[nrc] = TMath::Abs(dz); nrc++; |
1168 | } |
1169 | AliDebug(4, Form("Found %d clusters in %d rows. Sorting ...", ncls, nrc)); |
1170 | |
1171 | // sort row candidates |
1172 | if(nrc>=2){ |
1173 | if(nrc==2){ |
1174 | if(zresRow[0]>zresRow[1]){ // swap |
1175 | Int_t itmp=idxRow[1]; idxRow[1] = idxRow[0]; idxRow[0] = itmp; |
1176 | Double_t dtmp=zresRow[1]; zresRow[1] = zresRow[0]; zresRow[0] = dtmp; |
1177 | } |
1178 | if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){ |
1179 | SetErrorMsg(kAttachRowGap); |
1180 | AliDebug(2, Form("Rows attached not continuous. Select first candidate.\n" |
1181 | " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f", |
0a62661e |
1182 | idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], idxRow[1]<0?0:ncl[idxRow[1]], zresRow[1])); |
9dcc64cc |
1183 | nrc=1; idxRow[1] = -1; zresRow[1] = 999.; |
1184 | } |
1185 | } else { |
1186 | Int_t idx0[kNrows]; |
1187 | TMath::Sort(nrc, zresRow, idx0, kFALSE); |
1188 | nrc = 3; // select only maximum first 3 candidates |
1189 | Int_t iatmp[] = {-1, -1, -1}; Double_t datmp[] = {999., 999., 999.}; |
1190 | for(Int_t irc(0); irc<nrc; irc++){ |
1191 | iatmp[irc] = idxRow[idx0[irc]]; |
1192 | datmp[irc] = zresRow[idx0[irc]]; |
1193 | } |
1194 | idxRow[0] = iatmp[0]; zresRow[0] = datmp[0]; |
1195 | idxRow[1] = iatmp[1]; zresRow[1] = datmp[1]; |
1196 | idxRow[2] = iatmp[2]; zresRow[2] = datmp[2]; // temporary |
1197 | if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){ |
1198 | SetErrorMsg(kAttachRowGap); |
1199 | AliDebug(2, Form("Rows attached not continuous. Turn on selection.\n" |
1200 | "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n" |
1201 | "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n" |
1202 | "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f", |
1203 | idxRow[0], ncl[idxRow[0]], zresRow[0], |
1204 | idxRow[1], ncl[idxRow[1]], zresRow[1], |
1205 | idxRow[2], ncl[idxRow[2]], zresRow[2])); |
1206 | if(TMath::Abs(idxRow[0] - idxRow[2]) == 1){ // select second candidate |
1207 | AliDebug(2, "Solved ! Remove second candidate."); |
1208 | nrc = 2; |
1209 | idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap |
1210 | idxRow[2] = -1; zresRow[2] = 999.; // remove |
1211 | } else if(TMath::Abs(idxRow[1] - idxRow[2]) == 1){ |
1212 | if(ncl[idxRow[1]]+ncl[idxRow[2]] > ncl[idxRow[0]]){ |
1213 | AliDebug(2, "Solved ! Remove first candidate."); |
1214 | nrc = 2; |
1215 | idxRow[0] = idxRow[1]; zresRow[0] = zresRow[1]; // swap |
1216 | idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap |
1217 | } else { |
1218 | AliDebug(2, "Solved ! Remove second and third candidate."); |
1219 | nrc = 1; |
1220 | idxRow[1] = -1; zresRow[1] = 999.; // remove |
1221 | idxRow[2] = -1; zresRow[2] = 999.; // remove |
1222 | } |
1223 | } else { |
1224 | AliDebug(2, "Unsolved !!! Remove second and third candidate."); |
1225 | nrc = 1; |
1226 | idxRow[1] = -1; zresRow[1] = 999.; // remove |
1227 | idxRow[2] = -1; zresRow[2] = 999.; // remove |
1228 | } |
1229 | } else { // remove temporary candidate |
1230 | nrc = 2; |
1231 | idxRow[2] = -1; zresRow[2] = 999.; |
b1957d3c |
1232 | } |
b1957d3c |
1233 | } |
29b87567 |
1234 | } |
9dcc64cc |
1235 | AliDebug(4, Form("Sorted row candidates:\n" |
1236 | " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f" |
71dd3dcd |
1237 | , idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], idxRow[1]>=0?ncl[idxRow[1]]:0, zresRow[1])); |
9dcc64cc |
1238 | |
1239 | // initialize debug streamer |
1240 | TTreeSRedirector *pstreamer(NULL); |
1241 | if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
1242 | if(pstreamer){ |
1243 | // save config. for calibration |
1244 | TVectorD vdy[2], vdx[2], vs2[2]; |
1245 | for(Int_t jr(0); jr<nrc; jr++){ |
1246 | Int_t ir(idxRow[jr]); |
1247 | vdx[jr].ResizeTo(ncl[ir]); vdy[jr].ResizeTo(ncl[ir]); vs2[jr].ResizeTo(ncl[ir]); |
1248 | for(Int_t ic(ncl[ir]); ic--;){ |
1249 | vdx[jr](ic) = xres[ir][ic]; |
1250 | vdy[jr](ic) = yres[ir][ic]; |
1251 | vs2[jr](ic) = s2y[ir][ic]; |
1252 | } |
1253 | } |
1254 | (*pstreamer) << "AttachClusters4" |
1255 | << "r0=" << idxRow[0] |
1256 | << "dz0=" << zresRow[0] |
1257 | << "dx0=" << &vdx[0] |
560e5c05 |
1258 | << "dy0=" << &vdy[0] |
9dcc64cc |
1259 | << "s20=" << &vs2[0] |
1260 | << "r1=" << idxRow[1] |
1261 | << "dz1=" << zresRow[1] |
1262 | << "dx1=" << &vdx[1] |
560e5c05 |
1263 | << "dy1=" << &vdy[1] |
9dcc64cc |
1264 | << "s21=" << &vs2[1] |
560e5c05 |
1265 | << "\n"; |
9dcc64cc |
1266 | vdx[0].Clear(); vdy[0].Clear(); vs2[0].Clear(); |
1267 | vdx[1].Clear(); vdy[1].Clear(); vs2[1].Clear(); |
1268 | if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 4){ |
71dd3dcd |
1269 | Int_t idx(0); |
1270 | if(idxRow[1]<0){ |
9dcc64cc |
1271 | for(Int_t ir(0); ir<kNrows; ir++){ |
1272 | if(clst[ir].GetEntries()>0) continue; |
1273 | idx = ir; |
1274 | break; |
1275 | } |
71dd3dcd |
1276 | } else idx = idxRow[1]; |
9dcc64cc |
1277 | (*pstreamer) << "AttachClusters5" |
1278 | << "c0.=" << &clst[idxRow[0]] |
1279 | << "c1.=" << &clst[idx] |
1280 | << "\n"; |
1281 | } |
560e5c05 |
1282 | } |
1283 | |
9dcc64cc |
1284 | //======================================================================================= |
1285 | // Analyse cluster topology |
1286 | Double_t f[kNcls], // likelihood factors for segments |
1287 | r[2][kNcls], // d(dydx) of tracklet candidate with respect to track |
1288 | xm[2][kNcls], // mean <x> |
1289 | ym[2][kNcls], // mean <y> |
1290 | sm[2][kNcls], // mean <s_y> |
1291 | s[2][kNcls], // sigma_y |
1292 | p[2][kNcls]; // prob of Gauss |
1293 | memset(f, 0, kNcls*sizeof(Double_t)); |
1294 | Int_t index[2][kNcls], n[2][kNcls]; |
1295 | memset(n, 0, 2*kNcls*sizeof(Int_t)); |
1296 | Int_t mts(0), nts[2] = {0, 0}; // no of tracklet segments in row |
1297 | AliTRDpadPlane *pp(AliTRDtransform::Geometry().GetPadPlane(fDet)); |
1298 | AliTRDtrackletOflHelper helper; |
1299 | Int_t lyDet(AliTRDgeometry::GetLayer(fDet)); |
1300 | for(Int_t jr(0), n0(0); jr<nrc; jr++){ |
1301 | Int_t ir(idxRow[jr]); |
1302 | // cluster segmentation |
1303 | Bool_t kInit(kFALSE); |
1304 | if(jr==0){ |
1305 | n0 = helper.Init(pp, &clst[ir]); kInit = kTRUE; |
1306 | if(!n0 || (helper.ClassifyTopology() == AliTRDtrackletOflHelper::kNormal)){ |
1307 | nts[jr] = 1; memset(index[jr], 0, ncl[ir]*sizeof(Int_t)); |
1308 | n[jr][0] = ncl[ir]; |
560e5c05 |
1309 | } |
9dcc64cc |
1310 | } |
1311 | if(!n[jr][0]){ |
1312 | nts[jr] = AliTRDtrackletOflHelper::Segmentation(ncl[ir], xres[ir], yres[ir], index[jr]); |
1313 | for(Int_t ic(ncl[ir]);ic--;) n[jr][index[jr][ic]]++; |
1314 | } |
1315 | mts += nts[jr]; |
1316 | |
1317 | // tracklet segment processing |
1318 | for(Int_t its(0); its<nts[jr]; its++){ |
1319 | if(n[jr][its]<=2) { // don't touch small segments |
1320 | xm[jr][its] = 0.;ym[jr][its] = 0.;sm[jr][its] = 0.; |
1321 | for(Int_t ic(ncl[ir]); ic--;){ |
1322 | if(its != index[jr][ic]) continue; |
1323 | ym[jr][its] += yres[ir][ic]; |
1324 | xm[jr][its] += xres[ir][ic]; |
1325 | sm[jr][its] += TMath::Sqrt(s2y[ir][ic]); |
1326 | } |
1327 | if(n[jr][its]==2){ xm[jr][its] *= 0.5; ym[jr][its] *= 0.5; sm[jr][its] *= 0.5;} |
1328 | xm[jr][its]= fX0 - xm[jr][its]; |
1329 | r[jr][its] = 0.; |
1330 | s[jr][its] = 1.e-5; |
1331 | p[jr][its] = 1.; |
1332 | continue; |
560e5c05 |
1333 | } |
9dcc64cc |
1334 | |
1335 | // for longer tracklet segments |
1336 | if(!kInit) n0 = helper.Init(pp, &clst[ir], index[jr], its); |
1337 | Int_t n1 = helper.GetRMS(r[jr][its], ym[jr][its], s[jr][its], xm[jr][its]); |
1338 | p[jr][its] = Double_t(n1)/n0; |
1339 | sm[jr][its] = helper.GetSyMean(); |
1340 | |
1341 | Double_t dxm= fX0 - xm[jr][its]; |
1342 | yt = fYref[0] - fYref[1]*dxm; |
1343 | zt = fZref[0] - fZref[1]*dxm; |
1344 | // correct tracklet fit for tilt |
1345 | ym[jr][its]+= GetTilt()*(zt - zc[ir]); |
1346 | r[jr][its] += GetTilt() * fZref[1]; |
1347 | // correct tracklet fit for track position/inclination |
1348 | ym[jr][its]= yt - ym[jr][its]; |
1349 | r[jr][its] = (r[jr][its] - fYref[1])/(1+r[jr][its]*fYref[1]); |
1350 | // report inclination in radians |
1351 | r[jr][its] = TMath::ATan(r[jr][its]); |
1352 | if(jr) continue; // calculate only for first row likelihoods |
1353 | |
1354 | f[its] = attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n[jr][its], ym[jr][its]/*sRef*/, r[jr][its]*TMath::RadToDeg(), s[jr][its]/sm[jr][its]); |
29b87567 |
1355 | } |
1356 | } |
9dcc64cc |
1357 | AliDebug(4, Form(" Tracklet candidates: row[%2d] = %2d row[%2d] = %2d:", idxRow[0], nts[0], idxRow[1], nts[1])); |
1358 | if(AliLog::GetDebugLevel("TRD", "AliTRDseedV1")>3){ |
1359 | for(Int_t jr(0); jr<nrc; jr++){ |
1360 | Int_t ir(idxRow[jr]); |
1361 | for(Int_t its(0); its<nts[jr]; its++){ |
1362 | printf(" segId[%2d] row[%2d] Ncl[%2d] x[cm]=%7.2f dz[pu]=%4.2f dy[mm]=%+7.3f r[deg]=%+6.2f p[%%]=%6.2f s[um]=%7.2f\n", |
1363 | its, ir, n[jr][its], xm[jr][its], zresRow[jr], 1.e1*ym[jr][its], r[jr][its]*TMath::RadToDeg(), 100.*p[jr][its], 1.e4*s[jr][its]); |
1364 | } |
560e5c05 |
1365 | } |
ee8fb199 |
1366 | } |
9dcc64cc |
1367 | if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 2 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
1368 | if(pstreamer){ |
1369 | // save config. for calibration |
1370 | TVectorD vidx, vn, vx, vy, vr, vs, vsm, vp, vf; |
1371 | vidx.ResizeTo(ncl[idxRow[0]]+(idxRow[1]<0?0:ncl[idxRow[1]])); |
1372 | vn.ResizeTo(mts); |
1373 | vx.ResizeTo(mts); |
1374 | vy.ResizeTo(mts); |
1375 | vr.ResizeTo(mts); |
1376 | vs.ResizeTo(mts); |
1377 | vsm.ResizeTo(mts); |
1378 | vp.ResizeTo(mts); |
1379 | vf.ResizeTo(mts); |
1380 | for(Int_t jr(0), jts(0), jc(0); jr<nrc; jr++){ |
1381 | Int_t ir(idxRow[jr]); |
1382 | for(Int_t its(0); its<nts[jr]; its++, jts++){ |
1383 | vn[jts] = n[jr][its]; |
1384 | vx[jts] = xm[jr][its]; |
1385 | vy[jts] = ym[jr][its]; |
1386 | vr[jts] = r[jr][its]; |
1387 | vs[jts] = s[jr][its]; |
1388 | vsm[jts]= sm[jr][its]; |
1389 | vp[jts] = p[jr][its]; |
1390 | vf[jts] = jr?-1.:f[its]; |
6ad5e6b2 |
1391 | } |
9dcc64cc |
1392 | for(Int_t ic(0); ic<ncl[ir]; ic++, jc++) vidx[jc] = index[jr][ic]; |
1393 | } |
1394 | (*pstreamer) << "AttachClusters3" |
1395 | << "idx=" << &vidx |
1396 | << "n=" << &vn |
1397 | << "x=" << &vx |
1398 | << "y=" << &vy |
1399 | << "r=" << &vr |
1400 | << "s=" << &vs |
1401 | << "sm=" << &vsm |
1402 | << "p=" << &vp |
1403 | << "f=" << &vf |
1404 | << "\n"; |
1405 | } |
6ad5e6b2 |
1406 | |
9dcc64cc |
1407 | //========================================================= |
1408 | // Get seed tracklet segment |
1409 | Int_t idx2[kNcls]; memset(idx2, 0, kNcls*sizeof(Int_t)); // seeding indexing |
1410 | if(nts[0]>1) TMath::Sort(nts[0], f, idx2); |
1411 | Int_t is(idx2[0]); // seed index |
1412 | Int_t idxTrklt[kNcls], |
1413 | kts(0), |
1414 | nTrklt(n[0][is]); |
1415 | Double_t fTrklt(f[is]), |
1416 | rTrklt(r[0][is]), |
1417 | yTrklt(ym[0][is]), |
1418 | sTrklt(s[0][is]), |
1419 | smTrklt(sm[0][is]), |
1420 | xTrklt(xm[0][is]), |
1421 | pTrklt(p[0][is]); |
1422 | memset(idxTrklt, 0, kNcls*sizeof(Int_t)); |
1423 | // check seed idx2[0] exit if not found |
1424 | if(f[is]<1.e-2){ |
1425 | AliDebug(1, Form("Seed seg[%d] row[%2d] n[%2d] f[%f]<0.01.", is, idxRow[0], n[0][is], f[is])); |
1426 | SetErrorMsg(kAttachClAttach); |
1427 | if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
1428 | if(pstreamer){ |
1429 | UChar_t stat(0); |
1430 | if(IsKink()) SETBIT(stat, 1); |
1431 | if(IsStandAlone()) SETBIT(stat, 2); |
1432 | if(IsRowCross()) SETBIT(stat, 3); |
1433 | SETBIT(stat, 4); // set error bit |
1434 | TVectorD vidx; vidx.ResizeTo(1); vidx[0] = is; |
1435 | (*pstreamer) << "AttachClusters2" |
1436 | << "stat=" << stat |
1437 | << "ev=" << ev |
1438 | << "chg=" << chgPos |
1439 | << "det=" << fDet |
1440 | << "x0=" << fX0 |
1441 | << "y0=" << fYref[0] |
1442 | << "z0=" << fZref[0] |
1443 | << "phi=" << phiTrk |
1444 | << "tht=" << thtTrk |
1445 | << "pt=" << fPt |
1446 | << "s2Trk=" << s2yTrk |
1447 | << "s2Cl=" << s2Mean |
1448 | << "idx=" << &vidx |
1449 | << "n=" << nTrklt |
1450 | << "f=" << fTrklt |
1451 | << "x=" << xTrklt |
1452 | << "y=" << yTrklt |
1453 | << "r=" << rTrklt |
1454 | << "s=" << sTrklt |
1455 | << "sm=" << smTrklt |
1456 | << "p=" << pTrklt |
1457 | << "\n"; |
1458 | } |
1459 | return kFALSE; |
1460 | } |
1461 | AliDebug(2, Form("Seed seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%5.3f]", is, idxRow[0], n[0][is], ym[0][is], r[0][is]*TMath::RadToDeg(), s[0][is]/sm[0][is], f[is])); |
1462 | |
1463 | // save seeding segment in the helper |
1464 | idxTrklt[kts++] = is; |
1465 | helper.Init(pp, &clst[idxRow[0]], index[0], is); |
1466 | AliTRDtrackletOflHelper test; // helper to test segment expantion |
1467 | Float_t rcLikelihood(0.); SetBit(kRowCross, kFALSE); |
1468 | Double_t dyRez[kNcls]; Int_t idx3[kNcls]; |
1469 | |
1470 | //========================================================= |
1471 | // Define filter parameters from OCDB |
1472 | Int_t kNSgmDy[2]; attach->GetNsgmDy(kNSgmDy[0], kNSgmDy[1]); |
1473 | Float_t kLikeMinRelDecrease[2]; attach->GetLikeMinRelDecrease(kLikeMinRelDecrease[0], kLikeMinRelDecrease[1]); |
1474 | Float_t kRClikeLimit(attach->GetRClikeLimit()); |
1475 | |
1476 | //========================================================= |
1477 | // Try attaching next segments from first row (if any) |
1478 | if(nts[0]>1){ |
1479 | Int_t jr(0), ir(idxRow[jr]); |
1480 | // organize secondary sgms. in decreasing order of their distance from seed |
1481 | memset(dyRez, 0, nts[jr]*sizeof(Double_t)); |
1482 | for(Int_t jts(1); jts<nts[jr]; jts++) { |
1483 | Int_t its(idx2[jts]); |
1484 | Double_t rot(TMath::Tan(r[0][is])); |
1485 | dyRez[its] = TMath::Abs(ym[0][is] - ym[jr][its] + rot*(xm[0][is]-xm[jr][its])); |
1486 | } |
1487 | TMath::Sort(nts[jr], dyRez, idx3, kFALSE); |
1488 | for (Int_t jts(1); jts<nts[jr]; jts++) { |
1489 | Int_t its(idx3[jts]); |
1490 | if(dyRez[its] > kNSgmDy[jr]*smTrklt){ |
1491 | AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt)); |
1492 | continue; |
1493 | } |
1494 | |
1495 | test = helper; |
1496 | Int_t n0 = test.Expand(&clst[ir], index[jr], its); |
1497 | Double_t rt, dyt, st, xt, smt, pt, ft; |
1498 | Int_t n1 = test.GetRMS(rt, dyt, st, xt); |
1499 | pt = Double_t(n1)/n0; |
1500 | smt = test.GetSyMean(); |
1501 | // correct position |
1502 | Double_t dxm= fX0 - xt; |
1503 | yt = fYref[0] - fYref[1]*dxm; |
1504 | zt = fZref[0] - fZref[1]*dxm; |
1505 | // correct tracklet fit for tilt |
1506 | dyt+= GetTilt()*(zt - zc[idxRow[0]]); |
1507 | rt += GetTilt() * fZref[1]; |
1508 | // correct tracklet fit for track position/inclination |
1509 | dyt= yt - dyt; |
1510 | rt = (rt - fYref[1])/(1+rt*fYref[1]); |
1511 | // report inclination in radians |
1512 | rt = TMath::ATan(rt); |
1513 | |
1514 | ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.; |
1515 | Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr])); |
1516 | |
1517 | AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].", |
1518 | (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr]))); |
1519 | if(kAccept){ |
1520 | idxTrklt[kts++] = its; |
1521 | nTrklt = n0; |
1522 | fTrklt = ft; |
1523 | rTrklt = rt; |
1524 | yTrklt = dyt; |
1525 | sTrklt = st; |
1526 | smTrklt= smt; |
1527 | xTrklt = xt; |
1528 | pTrklt = pt; |
1529 | helper.Expand(&clst[ir], index[jr], its); |
1530 | } |
b1957d3c |
1531 | } |
560e5c05 |
1532 | } |
9dcc64cc |
1533 | |
1534 | //========================================================= |
1535 | // Try attaching next segments from second row (if any) |
1536 | if(nts[1] && (rcLikelihood = zresRow[0]/zresRow[1]) > kRClikeLimit){ |
1537 | // organize secondaries in decreasing order of their distance from seed |
1538 | Int_t jr(1), ir(idxRow[jr]); |
1539 | memset(dyRez, 0, nts[jr]*sizeof(Double_t)); |
1540 | Double_t rot(TMath::Tan(r[0][is])); |
1541 | for(Int_t jts(0); jts<nts[jr]; jts++) { |
1542 | dyRez[jts] = TMath::Abs(ym[0][is] - ym[jr][jts] + rot*(xm[0][is]-xm[jr][jts])); |
1543 | } |
1544 | TMath::Sort(nts[jr], dyRez, idx3, kFALSE); |
1545 | for (Int_t jts(0); jts<nts[jr]; jts++) { |
1546 | Int_t its(idx3[jts]); |
1547 | if(dyRez[its] > kNSgmDy[jr]*smTrklt){ |
1548 | AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt)); |
1549 | continue; |
1550 | } |
1551 | |
1552 | test = helper; |
1553 | Int_t n0 = test.Expand(&clst[ir], index[jr], its); |
1554 | Double_t rt, dyt, st, xt, smt, pt, ft; |
1555 | Int_t n1 = test.GetRMS(rt, dyt, st, xt); |
1556 | pt = Double_t(n1)/n0; |
1557 | smt = test.GetSyMean(); |
1558 | // correct position |
1559 | Double_t dxm= fX0 - xt; |
1560 | yt = fYref[0] - fYref[1]*dxm; |
1561 | zt = fZref[0] - fZref[1]*dxm; |
1562 | // correct tracklet fit for tilt |
1563 | dyt+= GetTilt()*(zt - zc[idxRow[0]]); |
1564 | rt += GetTilt() * fZref[1]; |
1565 | // correct tracklet fit for track position/inclination |
1566 | dyt= yt - dyt; |
1567 | rt = (rt - fYref[1])/(1+rt*fYref[1]); |
1568 | // report inclination in radians |
1569 | rt = TMath::ATan(rt); |
1570 | |
1571 | ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.; |
1572 | Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr])); |
1573 | |
1574 | AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].", |
1575 | (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr]))); |
1576 | if(kAccept){ |
1577 | idxTrklt[kts++] = its; |
1578 | nTrklt = n0; |
1579 | fTrklt = ft; |
1580 | rTrklt = rt; |
1581 | yTrklt = dyt; |
1582 | sTrklt = st; |
1583 | smTrklt= smt; |
1584 | xTrklt = xt; |
1585 | pTrklt = pt; |
1586 | helper.Expand(&clst[ir], index[jr], its); |
1587 | SetBit(kRowCross, kTRUE); // mark pad row crossing |
1588 | } |
1589 | } |
1590 | } |
1591 | // clear local copy of clusters |
1592 | for(Int_t ir(0); ir<kNrows; ir++) clst[ir].Clear(); |
1593 | |
1594 | if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
1595 | if(pstreamer){ |
1596 | UChar_t stat(0); |
1597 | if(IsKink()) SETBIT(stat, 1); |
1598 | if(IsStandAlone()) SETBIT(stat, 2); |
1599 | if(IsRowCross()) SETBIT(stat, 3); |
1600 | TVectorD vidx; vidx.ResizeTo(kts); |
1601 | for(Int_t its(0); its<kts; its++) vidx[its] = idxTrklt[its]; |
1602 | (*pstreamer) << "AttachClusters2" |
1603 | << "stat=" << stat |
1604 | << "ev=" << ev |
1605 | << "chg=" << chgPos |
1606 | << "det=" << fDet |
1607 | << "x0=" << fX0 |
1608 | << "y0=" << fYref[0] |
1609 | << "z0=" << fZref[0] |
1610 | << "phi=" << phiTrk |
1611 | << "tht=" << thtTrk |
1612 | << "pt=" << fPt |
1613 | << "s2Trk=" << s2yTrk |
1614 | << "s2Cl=" << s2Mean |
1615 | << "idx=" << &vidx |
1616 | << "n=" << nTrklt |
1617 | << "f=" << fTrklt |
1618 | << "x=" << xTrklt |
1619 | << "y=" << yTrklt |
1620 | << "r=" << rTrklt |
1621 | << "s=" << sTrklt |
1622 | << "sm=" << smTrklt |
1623 | << "p=" << pTrklt |
1624 | << "\n"; |
1625 | } |
1626 | |
1627 | |
1628 | //========================================================= |
1629 | // Store clusters |
1630 | Int_t nselected(0), nc(0); |
1631 | TObjArray *selected(helper.GetClusters()); |
1632 | if(!selected || !(nselected = selected->GetEntriesFast())){ |
1633 | AliError("Cluster candidates missing !!!"); |
1634 | SetErrorMsg(kAttachClAttach); |
1635 | return kFALSE; |
1636 | } |
1637 | for(Int_t ic(0); ic<nselected; ic++){ |
1638 | if(!(c = (AliTRDcluster*)selected->At(ic))) continue; |
1639 | Int_t it(c->GetPadTime()), |
1640 | jr(Int_t(helper.GetRow() != c->GetPadRow())), |
1641 | idx(it+kNtb*jr); |
1642 | if(fClusters[idx]){ |
1643 | AliDebug(1, Form("Multiple clusters/tb for D[%03d] Tb[%02d] Row[%2d]", fDet, it, c->GetPadRow())); |
1644 | continue; // already booked |
1645 | } |
1646 | // TODO proper indexing of clusters !! |
1647 | fIndexes[idx] = chamber->GetTB(it)->GetGlobalIndex(idxs[idxRow[jr]][ic]); |
1648 | fClusters[idx] = c; |
1649 | nc++; |
1650 | } |
1651 | AliDebug(2, Form("Clusters Found[%2d] Attached[%2d] RC[%c]", nselected, nc, IsRowCross()?'y':'n')); |
b1957d3c |
1652 | |
29b87567 |
1653 | // number of minimum numbers of clusters expected for the tracklet |
9dcc64cc |
1654 | if (nc < kClmin){ |
1655 | AliDebug(1, Form("NOT ENOUGH CLUSTERS %d ATTACHED TO THE TRACKLET [min %d] FROM FOUND %d.", nc, kClmin, ncls)); |
7c3eecb8 |
1656 | SetErrorMsg(kAttachClAttach); |
e4f2f73d |
1657 | return kFALSE; |
1658 | } |
9dcc64cc |
1659 | SetN(nc); |
0906e73e |
1660 | |
e3cf3d02 |
1661 | // Load calibration parameters for this tracklet |
9dcc64cc |
1662 | //Calibrate(); |
b1957d3c |
1663 | |
1664 | // calculate dx for time bins in the drift region (calibration aware) |
a2abcbc5 |
1665 | Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0}; |
1666 | for (Int_t it = t0, irp=0; irp<2 && it < AliTRDtrackerV1::GetNTimeBins(); it++) { |
b1957d3c |
1667 | if(!fClusters[it]) continue; |
1668 | x[irp] = fClusters[it]->GetX(); |
a2abcbc5 |
1669 | tb[irp] = fClusters[it]->GetLocalTimeBin(); |
b1957d3c |
1670 | irp++; |
e3cf3d02 |
1671 | } |
d86ed84c |
1672 | Int_t dtb = tb[1] - tb[0]; |
1673 | fdX = dtb ? (x[0] - x[1]) / dtb : 0.15; |
29b87567 |
1674 | return kTRUE; |
e4f2f73d |
1675 | } |
1676 | |
03cef9b2 |
1677 | //____________________________________________________________ |
1678 | void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec) |
1679 | { |
1680 | // Fill in all derived information. It has to be called after recovery from file or HLT. |
1681 | // The primitive data are |
1682 | // - list of clusters |
1683 | // - detector (as the detector will be removed from clusters) |
1684 | // - position of anode wire (fX0) - temporary |
1685 | // - track reference position and direction |
1686 | // - momentum of the track |
1687 | // - time bin length [cm] |
1688 | // |
1689 | // A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008 |
1690 | // |
4d6aee34 |
1691 | fkReconstructor = rec; |
03cef9b2 |
1692 | AliTRDgeometry g; |
2eb10c34 |
1693 | SetPadPlane(g.GetPadPlane(fDet)); |
1694 | |
e3cf3d02 |
1695 | //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]); |
1696 | //fTgl = fZref[1]; |
3e778975 |
1697 | Int_t n = 0, nshare = 0, nused = 0; |
03cef9b2 |
1698 | AliTRDcluster **cit = &fClusters[0]; |
8d2bec9e |
1699 | for(Int_t ic = kNclusters; ic--; cit++){ |
03cef9b2 |
1700 | if(!(*cit)) return; |
3e778975 |
1701 | n++; |
1702 | if((*cit)->IsShared()) nshare++; |
1703 | if((*cit)->IsUsed()) nused++; |
03cef9b2 |
1704 | } |
3e778975 |
1705 | SetN(n); SetNUsed(nused); SetNShared(nshare); |
e3cf3d02 |
1706 | Fit(); |
03cef9b2 |
1707 | CookLabels(); |
1708 | GetProbability(); |
1709 | } |
1710 | |
1711 | |
e4f2f73d |
1712 | //____________________________________________________________________ |
2eb10c34 |
1713 | Bool_t AliTRDseedV1::Fit(UChar_t opt) |
e4f2f73d |
1714 | { |
16cca13f |
1715 | // |
1716 | // Linear fit of the clusters attached to the tracklet |
1717 | // |
1718 | // Parameters : |
2eb10c34 |
1719 | // - opt : switch for tilt pad correction of cluster y position. Options are |
1720 | // 0 no correction [default] |
1721 | // 1 full tilt correction [dz/dx and z0] |
1722 | // 2 pseudo tilt correction [dz/dx from pad-chamber geometry] |
1723 | // |
16cca13f |
1724 | // Output : |
1725 | // True if successful |
1726 | // |
1727 | // Detailed description |
1728 | // |
1729 | // Fit in the xy plane |
1730 | // |
1fd9389f |
1731 | // The fit is performed to estimate the y position of the tracklet and the track |
1732 | // angle in the bending plane. The clusters are represented in the chamber coordinate |
1733 | // system (with respect to the anode wire - see AliTRDtrackerV1::FollowBackProlongation() |
1734 | // on how this is set). The x and y position of the cluster and also their variances |
1735 | // are known from clusterizer level (see AliTRDcluster::GetXloc(), AliTRDcluster::GetYloc(), |
1736 | // AliTRDcluster::GetSX() and AliTRDcluster::GetSY()). |
1737 | // If gaussian approximation is used to calculate y coordinate of the cluster the position |
1738 | // is recalculated taking into account the track angle. The general formula to calculate the |
1739 | // error of cluster position in the gaussian approximation taking into account diffusion and track |
1740 | // inclination is given for TRD by: |
1741 | // BEGIN_LATEX |
1742 | // #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} |
1743 | // END_LATEX |
1744 | // |
1745 | // Since errors are calculated only in the y directions, radial errors (x direction) are mapped to y |
1746 | // by projection i.e. |
1747 | // BEGIN_LATEX |
1748 | // #sigma_{x|y} = tg(#phi) #sigma_{x} |
1749 | // END_LATEX |
1750 | // and also by the lorentz angle correction |
1751 | // |
1752 | // Fit in the xz plane |
1753 | // |
1754 | // The "fit" is performed to estimate the radial position (x direction) where pad row cross happens. |
1755 | // If no pad row crossing the z position is taken from geometry and radial position is taken from the xy |
1756 | // fit (see below). |
1757 | // |
1758 | // There are two methods to estimate the radial position of the pad row cross: |
1759 | // 1. leading cluster radial position : Here the lower part of the tracklet is considered and the last |
1760 | // cluster registered (at radial x0) on this segment is chosen to mark the pad row crossing. The error |
1761 | // of the z estimate is given by : |
1762 | // BEGIN_LATEX |
1763 | // #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12 |
1764 | // END_LATEX |
1765 | // The systematic errors for this estimation are generated by the following sources: |
1766 | // - no charge sharing between pad rows is considered (sharp cross) |
1767 | // - missing cluster at row cross (noise peak-up, under-threshold signal etc.). |
1768 | // |
1769 | // 2. charge fit over the crossing point : Here the full energy deposit along the tracklet is considered |
1770 | // to estimate the position of the crossing by a fit in the qx plane. The errors in the q directions are |
1771 | // parameterized as s_q = q^2. The systematic errors for this estimation are generated by the following sources: |
1772 | // - no general model for the qx dependence |
1773 | // - physical fluctuations of the charge deposit |
1774 | // - gain calibration dependence |
1775 | // |
1776 | // Estimation of the radial position of the tracklet |
16cca13f |
1777 | // |
1fd9389f |
1778 | // For pad row cross the radial position is taken from the xz fit (see above). Otherwise it is taken as the |
1779 | // interpolation point of the tracklet i.e. the point where the error in y of the fit is minimum. The error |
1780 | // in the y direction of the tracklet is (see AliTRDseedV1::GetCovAt()): |
1781 | // BEGIN_LATEX |
1782 | // #sigma_{y} = #sigma^{2}_{y_{0}} + 2xcov(y_{0}, dy/dx) + #sigma^{2}_{dy/dx} |
1783 | // END_LATEX |
1784 | // and thus the radial position is: |
1785 | // BEGIN_LATEX |
1786 | // x = - cov(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} |
1787 | // END_LATEX |
1788 | // |
1789 | // Estimation of tracklet position error |
1790 | // |
1791 | // The error in y direction is the error of the linear fit at the radial position of the tracklet while in the z |
1792 | // direction is given by the cluster error or pad row cross error. In case of no pad row cross this is given by: |
1793 | // BEGIN_LATEX |
1794 | // #sigma_{y} = #sigma^{2}_{y_{0}} - 2cov^{2}(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} + #sigma^{2}_{dy/dx} |
1795 | // #sigma_{z} = Pad_{length}/12 |
1796 | // END_LATEX |
1797 | // For pad row cross the full error is calculated at the radial position of the crossing (see above) and the error |
1798 | // in z by the width of the crossing region - being a matter of parameterization. |
1799 | // BEGIN_LATEX |
1800 | // #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12 |
1801 | // END_LATEX |
1802 | // In case of no tilt correction (default in the barrel tracking) the tilt is taken into account by the rotation of |
1803 | // the covariance matrix. See AliTRDseedV1::GetCovAt() for details. |
1804 | // |
1805 | // Author |
1806 | // A.Bercuci <A.Bercuci@gsi.de> |
e4f2f73d |
1807 | |
a723055f |
1808 | if(!fkReconstructor){ |
1809 | AliError("The tracklet needs the reconstruction setup. Please initialize by SetReconstructor()."); |
1810 | return kFALSE; |
1811 | } |
b72f4eaf |
1812 | if(!IsCalibrated()) Calibrate(); |
2eb10c34 |
1813 | if(opt>2){ |
7e5954f0 |
1814 | AliWarning(Form("Option [%d] outside range [0, 2]. Using default",opt)); |
2eb10c34 |
1815 | opt=0; |
1816 | } |
e3cf3d02 |
1817 | |
29b87567 |
1818 | const Int_t kClmin = 8; |
2eb10c34 |
1819 | const Float_t kScalePulls = 10.; // factor to scale y pulls - NOT UNDERSTOOD |
2f7d6ac8 |
1820 | // get track direction |
1821 | Double_t y0 = fYref[0]; |
1822 | Double_t dydx = fYref[1]; |
1823 | Double_t z0 = fZref[0]; |
1824 | Double_t dzdx = fZref[1]; |
ae4e8b84 |
1825 | |
5f1ae1e7 |
1826 | AliTRDtrackerV1::AliTRDLeastSquare fitterY; |
1827 | AliTRDtrackerV1::AliTRDLeastSquare fitterZ; |
f301a656 |
1828 | |
29b87567 |
1829 | // book cluster information |
8d2bec9e |
1830 | Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters]; |
e3cf3d02 |
1831 | |
2eb10c34 |
1832 | Bool_t tilt(opt==1) // full tilt correction |
1833 | ,pseudo(opt==2) // pseudo tilt correction |
1834 | ,rc(IsRowCross()) // row cross candidate |
1835 | ,kDZDX(IsPrimary());// switch dzdx calculation for barrel primary tracks |
1836 | Int_t n(0); // clusters used in fit |
1837 | AliTRDcluster *c(NULL), *cc(NULL), **jc = &fClusters[0]; |
fc0882f3 |
1838 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it |
2eb10c34 |
1839 | |
1840 | const Char_t *tcName[]={"NONE", "FULL", "HALF"}; |
1841 | AliDebug(2, Form("Options : TC[%s] dzdx[%c]", tcName[opt], kDZDX?'Y':'N')); |
1842 | |
9dcc64cc |
1843 | |
2eb10c34 |
1844 | for (Int_t ic=0; ic<kNclusters; ic++, ++jc) { |
1845 | xc[ic] = -1.; yc[ic] = 999.; zc[ic] = 999.; sy[ic] = 0.; |
9eb2d46c |
1846 | if(!(c = (*jc))) continue; |
29b87567 |
1847 | if(!c->IsInChamber()) continue; |
2eb10c34 |
1848 | // compute pseudo tilt correction |
1849 | if(kDZDX){ |
1850 | fZfit[0] = c->GetZ(); |
1851 | if(rc){ |
1852 | for(Int_t kc=AliTRDseedV1::kNtb; kc<AliTRDseedV1::kNclusters; kc++){ |
1853 | if(!(cc=fClusters[kc])) continue; |
1854 | if(!cc->IsInChamber()) continue; |
1855 | fZfit[0] += cc->GetZ(); fZfit[0] *= 0.5; |
1856 | break; |
1857 | } |
1858 | } |
1859 | fZfit[1] = fZfit[0]/fX0; |
1860 | if(rc){ |
1861 | fZfit[0] += fZfit[1]*0.5*AliTRDgeometry::CdrHght(); |
1862 | fZfit[1] = fZfit[0]/fX0; |
1863 | } |
1864 | kDZDX=kFALSE; |
1865 | } |
9462866a |
1866 | |
29b87567 |
1867 | Float_t w = 1.; |
1868 | if(c->GetNPads()>4) w = .5; |
1869 | if(c->GetNPads()>5) w = .2; |
010d62b0 |
1870 | |
1fd9389f |
1871 | // cluster charge |
dd8059a8 |
1872 | qc[n] = TMath::Abs(c->GetQ()); |
1fd9389f |
1873 | // pad row of leading |
1874 | |
b72f4eaf |
1875 | xc[n] = fX0 - c->GetX(); |
1876 | |
1fd9389f |
1877 | // Recalculate cluster error based on tracking information |
2eb10c34 |
1878 | c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], -1./*zcorr?zt:-1.*/, dydx); |
c79857d5 |
1879 | c->SetSigmaZ2(fPad[0]*fPad[0]/12.); // for HLT |
1fd9389f |
1880 | sy[n] = TMath::Sqrt(c->GetSigmaY2()); |
1881 | |
fc0882f3 |
1882 | yc[n] = recoParam->UseGAUS() ? |
1fd9389f |
1883 | c->GetYloc(y0, sy[n], GetPadWidth()): c->GetY(); |
1884 | zc[n] = c->GetZ(); |
2eb10c34 |
1885 | |
1886 | //optional r-phi correction |
1887 | //printf(" n[%2d] yc[%7.5f] ", n, yc[n]); |
1888 | Float_t correction(0.); |
1889 | if(tilt) correction = fPad[2]*(xc[n]*dzdx + zc[n] - z0); |
1890 | else if(pseudo) correction = fPad[2]*(xc[n]*fZfit[1] + zc[n]-fZfit[0]); |
1891 | yc[n]-=correction; |
1892 | //printf("corr(%s%s)[%7.5f] yc1[%7.5f]\n", (tilt?"TC":""), (zcorr?"PC":""), correction, yc[n]); |
1fd9389f |
1893 | |
fbe11be7 |
1894 | AliDebug(5, Form(" tb[%2d] dx[%6.3f] y[%6.2f+-%6.3f]", c->GetLocalTimeBin(), xc[n], yc[n], sy[n])); |
903326c1 |
1895 | fitterY.AddPoint(&xc[n], yc[n], sy[n]); |
2eb10c34 |
1896 | if(rc) fitterZ.AddPoint(&xc[n], qc[n]*(ic<kNtb?1.:-1.), 1.); |
dd8059a8 |
1897 | n++; |
29b87567 |
1898 | } |
3044dfe5 |
1899 | |
47d5d320 |
1900 | // to few clusters |
c79857d5 |
1901 | if (n < kClmin){ |
c388cdcb |
1902 | AliDebug(1, Form("Not enough clusters to fit. Clusters: Attached[%d] Fit[%d].", GetN(), n)); |
2eb10c34 |
1903 | SetErrorMsg(kFitCl); |
c79857d5 |
1904 | return kFALSE; |
1905 | } |
d937ad7a |
1906 | // fit XY |
903326c1 |
1907 | if(!fitterY.Eval()){ |
c388cdcb |
1908 | AliDebug(1, "Fit Y failed."); |
2eb10c34 |
1909 | SetErrorMsg(kFitFailedY); |
903326c1 |
1910 | return kFALSE; |
1911 | } |
5f1ae1e7 |
1912 | fYfit[0] = fitterY.GetFunctionParameter(0); |
1913 | fYfit[1] = -fitterY.GetFunctionParameter(1); |
d937ad7a |
1914 | // store covariance |
5f1ae1e7 |
1915 | Double_t p[3]; |
1916 | fitterY.GetCovarianceMatrix(p); |
2eb10c34 |
1917 | fCov[0] = kScalePulls*p[1]; // variance of y0 |
1918 | fCov[1] = kScalePulls*p[2]; // covariance of y0, dydx |
1919 | fCov[2] = kScalePulls*p[0]; // variance of dydx |
b1957d3c |
1920 | // the ref radial position is set at the minimum of |
1921 | // the y variance of the tracklet |
b72f4eaf |
1922 | fX = -fCov[1]/fCov[2]; |
2eb10c34 |
1923 | fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2]; |
1924 | |
903326c1 |
1925 | Float_t xs=fX+.5*AliTRDgeometry::CamHght(); |
1926 | if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){ |
1927 | AliDebug(1, Form("Ref radial position ouside chamber x[%5.2f].", fX)); |
2eb10c34 |
1928 | SetErrorMsg(kFitFailedY); |
903326c1 |
1929 | return kFALSE; |
1930 | } |
b1957d3c |
1931 | |
2eb10c34 |
1932 | /* // THE LEADING CLUSTER METHOD for z fit |
1fd9389f |
1933 | Float_t xMin = fX0; |
b72f4eaf |
1934 | Int_t ic=n=kNclusters-1; jc = &fClusters[ic]; |
1fd9389f |
1935 | AliTRDcluster *c0 =0x0, **kc = &fClusters[kNtb-1]; |
1936 | for(; ic>kNtb; ic--, --jc, --kc){ |
1937 | if((c0 = (*kc)) && c0->IsInChamber() && (xMin>c0->GetX())) xMin = c0->GetX(); |
1938 | if(!(c = (*jc))) continue; |
1939 | if(!c->IsInChamber()) continue; |
1940 | zc[kNclusters-1] = c->GetZ(); |
1941 | fX = fX0 - c->GetX(); |
1942 | } |
1943 | fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.; |
1944 | // Error parameterization |
1945 | fS2Z = fdX*fZref[1]; |
e355f67a |
1946 | fS2Z *= fS2Z; fS2Z *= 0.2887; // 1/sqrt(12)*/ |
1947 | |
2eb10c34 |
1948 | // fit QZ |
1949 | if(opt!=1 && IsRowCross()){ |
1950 | if(!fitterZ.Eval()) SetErrorMsg(kFitFailedZ); |
4ecadb52 |
1951 | if(!HasError(kFitFailedZ) && TMath::Abs(fitterZ.GetFunctionParameter(1))>1.e-10){ |
2eb10c34 |
1952 | // TODO - one has to recalculate xy fit based on |
1953 | // better knowledge of z position |
1954 | // Double_t x = -fitterZ.GetFunctionParameter(0)/fitterZ.GetFunctionParameter(1); |
1955 | // Double_t z0 = .5*(zc[0]+zc[n-1]); |
1956 | // fZfit[0] = z0 + fZfit[1]*x; |
1957 | // fZfit[1] = fZfit[0]/fX0; |
1958 | // redo fit on xy plane |
b72f4eaf |
1959 | } |
c850c351 |
1960 | // temporary external error parameterization |
1961 | fS2Z = 0.05+0.4*TMath::Abs(fZref[1]); fS2Z *= fS2Z; |
1962 | // TODO correct formula |
1963 | //fS2Z = sigma_x*TMath::Abs(fZref[1]); |
b1957d3c |
1964 | } else { |
2eb10c34 |
1965 | //fZfit[0] = zc[0] + dzdx*0.5*AliTRDgeometry::CdrHght(); |
dd8059a8 |
1966 | fS2Z = GetPadLength()*GetPadLength()/12.; |
29b87567 |
1967 | } |
29b87567 |
1968 | return kTRUE; |
e4f2f73d |
1969 | } |
1970 | |
e4f2f73d |
1971 | |
9dcc64cc |
1972 | //____________________________________________________________________ |
1973 | Bool_t AliTRDseedV1::FitRobust(Bool_t chg) |
e3cf3d02 |
1974 | { |
1975 | // |
9dcc64cc |
1976 | // Linear fit of the clusters attached to the tracklet |
e3cf3d02 |
1977 | // |
9dcc64cc |
1978 | // Author |
1979 | // A.Bercuci <A.Bercuci@gsi.de> |
e3cf3d02 |
1980 | |
9dcc64cc |
1981 | TTreeSRedirector *pstreamer(NULL); |
1982 | const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); |
e3cf3d02 |
1983 | |
9dcc64cc |
1984 | // factor to scale y pulls. |
1985 | // ideally if error parametrization correct this is 1. |
1986 | //Float_t lyScaler = 1./(AliTRDgeometry::GetLayer(fDet)+1.); |
1987 | Float_t kScalePulls = 1.; |
1988 | AliTRDcalibDB *calibration = AliTRDcalibDB::Instance(); |
1989 | if(!calibration){ |
1990 | AliWarning("No access to calibration data"); |
1991 | } else { |
1992 | // Retrieve the CDB container class with the parametric likelihood |
1993 | const AliTRDCalTrkAttach *attach = calibration->GetAttachObject(); |
1994 | if(!attach){ |
1995 | AliWarning("No usable AttachClusters calib object."); |
1996 | } else { |
1997 | kScalePulls = attach->GetScaleCov();//*lyScaler; |
1998 | } |
e3cf3d02 |
1999 | } |
9dcc64cc |
2000 | Double_t xc[kNclusters], yc[kNclusters], sy[kNclusters]; |
2001 | Int_t n(0), // clusters used in fit |
2002 | row[]={-1, 0}; // pad row spanned by the tracklet |
2003 | AliTRDcluster *c(NULL), **jc = &fClusters[0]; |
2004 | for(Int_t ic=0; ic<kNtb; ic++, ++jc) { |
2005 | if(!(c = (*jc))) continue; |
2006 | if(!c->IsInChamber()) continue; |
2007 | if(row[0]<0){ |
2008 | fZfit[0] = c->GetZ(); |
2009 | fZfit[1] = 0.; |
2010 | row[0] = c->GetPadRow(); |
e3cf3d02 |
2011 | } |
9dcc64cc |
2012 | xc[n] = fX0 - c->GetX(); |
2013 | yc[n] = c->GetY(); |
2014 | sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08; |
2015 | n++; |
e3cf3d02 |
2016 | } |
9dcc64cc |
2017 | Double_t corr = fPad[2]*fPad[0]; |
e3cf3d02 |
2018 | |
9dcc64cc |
2019 | for(Int_t ic=kNtb; ic<kNclusters; ic++, ++jc) { |
2020 | if(!(c = (*jc))) continue; |
2021 | if(!c->IsInChamber()) continue; |
2022 | if(row[1]==0) row[1] = c->GetPadRow() - row[0]; |
2023 | xc[n] = fX0 - c->GetX(); |
2024 | yc[n] = c->GetY() + corr*row[1]; |
2025 | sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08; |
2026 | n++; |
e3cf3d02 |
2027 | } |
9dcc64cc |
2028 | UChar_t status(0); |
2029 | Double_t par[3] = {0.,0.,21122012.}, cov[3]; |
2030 | if(!AliTRDtrackletOflHelper::Fit(n, xc, yc, sy, par, 1.5, cov)){ |
2031 | AliDebug(1, Form("Tracklet fit failed D[%03d].", fDet)); |
2032 | SetErrorMsg(kFitCl); |
2033 | return kFALSE; |
e3cf3d02 |
2034 | } |
9dcc64cc |
2035 | fYfit[0] = par[0]; |
2036 | fYfit[1] = -par[1]; |
2037 | // store covariance |
2038 | fCov[0] = kScalePulls*cov[0]; // variance of y0 |
2039 | fCov[1] = kScalePulls*cov[2]; // covariance of y0, dydx |
2040 | fCov[2] = kScalePulls*cov[1]; // variance of dydx |
2041 | // the ref radial position is set at the minimum of |
2042 | // the y variance of the tracklet |
2043 | fX = -fCov[1]/fCov[2]; |
2044 | // check radial position |
2045 | Float_t xs=fX+.5*AliTRDgeometry::CamHght(); |
2046 | if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){ |
2047 | AliDebug(1, Form("Ref radial position x[%5.2f] ouside D[%3d].", fX, fDet)); |
2048 | SetErrorMsg(kFitFailedY); |
2049 | return kFALSE; |
e3cf3d02 |
2050 | } |
9dcc64cc |
2051 | fS2Y = fCov[0] + fX*fCov[1]; |
2052 | fS2Z = fPad[0]*fPad[0]/12.; |
2053 | AliDebug(2, Form("[I] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[cm]=%6.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z))); |
2054 | if(IsRowCross()){ |
2055 | Float_t x,z; |
2056 | if(!GetEstimatedCrossPoint(x,z)){ |
2057 | AliDebug(2, Form("Failed getting crossing point D[%03d].", fDet)); |
2058 | SetErrorMsg(kFitFailedY); |
2059 | return kTRUE; |
2060 | } |
2061 | fX = fX0-x; |
2062 | fS2Y = fCov[0] + fX*fCov[1]; |
2063 | fZfit[0] = z; |
2064 | if(IsPrimary()){ |
2065 | fZfit[1] = z/x; |
2066 | fS2Z = 0.05+0.4*TMath::Abs(fZfit[1]); fS2Z *= fS2Z; |
2067 | } |
2068 | AliDebug(2, Form("[II] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[um]=%6.2f dzdx[deg]=%+5.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)*1.e4, TMath::ATan(fZfit[1])*TMath::RadToDeg())); |
e3cf3d02 |
2069 | } |
e3cf3d02 |
2070 | |
9dcc64cc |
2071 | if(pstreamer){ |
2072 | Float_t x= fX0 -fX, |
2073 | y = GetY(), |
2074 | yt = fYref[0]-fX*fYref[1]; |
2075 | SETBIT(status, 2); |
2076 | TVectorD vcov(3); vcov[0]=cov[0];vcov[1]=cov[1];vcov[2]=cov[2]; |
2077 | Double_t sm(0.), chi2(0.), tmp, dy[kNclusters]; |
2078 | for(Int_t ic(0); ic<n; ic++){ |
2079 | sm += sy[ic]; |
2080 | dy[ic] = yc[ic]-(fYfit[0]-xc[ic]*fYfit[1]); tmp = dy[ic]/sy[ic]; |
2081 | chi2 += tmp*tmp; |
2082 | } |
2083 | sm /= n; chi2 = TMath::Sqrt(chi2); |
2084 | Double_t m(0.), s(0.); |
2085 | AliMathBase::EvaluateUni(n, dy, m, s, 0); |
2086 | (*pstreamer) << "FitRobust4" |
2087 | << "stat=" << status |
2088 | << "chg=" << chg |
2089 | << "ncl=" << n |
2090 | << "det=" << fDet |
2091 | << "x0=" << fX0 |
2092 | << "y0=" << fYfit[0] |
2093 | << "x=" << x |
2094 | << "y=" << y |
2095 | << "dydx=" << fYfit[1] |
2096 | << "pt=" << fPt |
2097 | << "yt=" << yt |
2098 | << "dydxt="<< fYref[1] |
2099 | << "cov=" << &vcov |
2100 | << "chi2=" << chi2 |
2101 | << "sm=" << sm |
2102 | << "ss=" << s |
2103 | << "\n"; |
2104 | } |
2105 | return kTRUE; |
2106 | } |
e3cf3d02 |
2107 | |
e4f2f73d |
2108 | //___________________________________________________________________ |
203967fc |
2109 | void AliTRDseedV1::Print(Option_t *o) const |
e4f2f73d |
2110 | { |
2111 | // |
2112 | // Printing the seedstatus |
2113 | // |
2114 | |
b72f4eaf |
2115 | AliInfo(Form("Det[%3d] X0[%7.2f] Pad{L[%5.2f] W[%5.2f] Tilt[%+6.2f]}", fDet, fX0, GetPadLength(), GetPadWidth(), GetTilt())); |
dd8059a8 |
2116 | AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d] [%d]", GetN(), GetNUsed(), GetNShared(), fN)); |
b72f4eaf |
2117 | AliInfo(Form("FLAGS : RC[%c] Kink[%c] SA[%c]", IsRowCross()?'y':'n', IsKink()?'y':'n', IsStandAlone()?'y':'n')); |
525f399b |
2118 | 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 |
2119 | |
2120 | Double_t cov[3], x=GetX(); |
2121 | GetCovAt(x, cov); |
2122 | AliInfo(" | x[cm] | y[cm] | z[cm] | dydx | dzdx |"); |
2123 | 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])); |
13242232 |
2124 | 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 |
2125 | AliInfo(Form("P / Pt [GeV/c] = %f / %f", GetMomentum(), fPt)); |
68f9b6bd |
2126 | if(IsStandAlone()) AliInfo(Form("C Rieman / Vertex [1/cm] = %f / %f", fC[0], fC[1])); |
ee8fb199 |
2127 | 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])); |
2128 | AliInfo(Form("PID = %5.3f / %5.3f / %5.3f / %5.3f / %5.3f", fProb[0], fProb[1], fProb[2], fProb[3], fProb[4])); |
203967fc |
2129 | |
2130 | if(strcmp(o, "a")!=0) return; |
2131 | |
4dc4dc2e |
2132 | AliTRDcluster* const* jc = &fClusters[0]; |
8d2bec9e |
2133 | for(int ic=0; ic<kNclusters; ic++, jc++) { |
4dc4dc2e |
2134 | if(!(*jc)) continue; |
203967fc |
2135 | (*jc)->Print(o); |
4dc4dc2e |
2136 | } |
e4f2f73d |
2137 | } |
47d5d320 |
2138 | |
203967fc |
2139 | |
2140 | //___________________________________________________________________ |
2141 | Bool_t AliTRDseedV1::IsEqual(const TObject *o) const |
2142 | { |
2143 | // Checks if current instance of the class has the same essential members |
2144 | // as the given one |
2145 | |
2146 | if(!o) return kFALSE; |
2147 | const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o); |
2148 | if(!inTracklet) return kFALSE; |
2149 | |
2150 | for (Int_t i = 0; i < 2; i++){ |
e3cf3d02 |
2151 | if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE; |
2152 | if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE; |
203967fc |
2153 | } |
2154 | |
4ecadb52 |
2155 | if ( TMath::Abs(fS2Y - inTracklet->fS2Y)>1.e-10 ) return kFALSE; |
2156 | if ( TMath::Abs(GetTilt() - inTracklet->GetTilt())>1.e-10 ) return kFALSE; |
2157 | if ( TMath::Abs(GetPadLength() - inTracklet->GetPadLength())>1.e-10 ) return kFALSE; |
203967fc |
2158 | |
8d2bec9e |
2159 | for (Int_t i = 0; i < kNclusters; i++){ |
e3cf3d02 |
2160 | // if ( fX[i] != inTracklet->GetX(i) ) return kFALSE; |
2161 | // if ( fY[i] != inTracklet->GetY(i) ) return kFALSE; |
2162 | // if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE; |
2163 | if ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE; |
203967fc |
2164 | } |
f29f13a6 |
2165 | // if ( fUsable != inTracklet->fUsable ) return kFALSE; |
203967fc |
2166 | |
2167 | for (Int_t i=0; i < 2; i++){ |
e3cf3d02 |
2168 | if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE; |
2169 | if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE; |
2170 | if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE; |
203967fc |
2171 | } |
2172 | |
e3cf3d02 |
2173 | /* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE; |
2174 | if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/ |
3e778975 |
2175 | if ( fN != inTracklet->fN ) return kFALSE; |
2176 | //if ( fNUsed != inTracklet->fNUsed ) return kFALSE; |
e3cf3d02 |
2177 | //if ( fFreq != inTracklet->GetFreq() ) return kFALSE; |
2178 | //if ( fNChange != inTracklet->GetNChange() ) return kFALSE; |
203967fc |
2179 | |
4ecadb52 |
2180 | if ( TMath::Abs(fC[0] - inTracklet->fC[0])>1.e-10 ) return kFALSE; |
e3cf3d02 |
2181 | //if ( fCC != inTracklet->GetCC() ) return kFALSE; |
4ecadb52 |
2182 | if ( TMath::Abs(fChi2 - inTracklet->fChi2)>1.e-10 ) return kFALSE; |
203967fc |
2183 | // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE; |
2184 | |
e3cf3d02 |
2185 | if ( fDet != inTracklet->fDet ) return kFALSE; |
4ecadb52 |
2186 | if ( TMath::Abs(fPt - inTracklet->fPt)>1.e-10 ) return kFALSE; |
2187 | if ( TMath::Abs(fdX - inTracklet->fdX)>1.e-10 ) return kFALSE; |
203967fc |
2188 | |
8d2bec9e |
2189 | for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){ |
203967fc |
2190 | AliTRDcluster *curCluster = fClusters[iCluster]; |
e3cf3d02 |
2191 | AliTRDcluster *inCluster = inTracklet->fClusters[iCluster]; |
203967fc |
2192 | if (curCluster && inCluster){ |
2193 | if (! curCluster->IsEqual(inCluster) ) { |
2194 | curCluster->Print(); |
2195 | inCluster->Print(); |
2196 | return kFALSE; |
2197 | } |
2198 | } else { |
2199 | // if one cluster exists, and corresponding |
2200 | // in other tracklet doesn't - return kFALSE |
2201 | if(curCluster || inCluster) return kFALSE; |
2202 | } |
2203 | } |
2204 | return kTRUE; |
2205 | } |
5d401b45 |
2206 | |