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81e97e0d 1/**************************************************************************
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 **************************************************************************/
15
16
17
18
19//-----------------------------------------------------------------
20// Implementation of the TPC seed class
21// This class is used by the AliTPCtrackerMI class
22// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
23//-----------------------------------------------------------------
24#include "TClonesArray.h"
25#include "AliTPCseed.h"
3f82c4f2 26#include "AliTPCReconstructor.h"
0a65832b 27#include "AliTPCClusterParam.h"
81e97e0d 28
29ClassImp(AliTPCseed)
30
31
32
32fab534 33AliTPCseed::AliTPCseed():
34 AliTPCtrack(),
35 fEsd(0x0),
2928bdf0 36 fClusterOwner(kFALSE),
32fab534 37 fPoints(0x0),
38 fEPoints(0x0),
39 fRow(0),
40 fSector(-1),
41 fRelativeSector(-1),
42 fCurrentSigmaY2(1e10),
43 fCurrentSigmaZ2(1e10),
44 fErrorY2(1e10),
45 fErrorZ2(1e10),
46 fCurrentCluster(0x0),
47 fCurrentClusterIndex1(-1),
48 fInDead(kFALSE),
49 fIsSeeding(kFALSE),
50 fNoCluster(0),
51 fSort(0),
52 fBSigned(kFALSE),
53 fSeedType(0),
54 fSeed1(-1),
55 fSeed2(-1),
56 fMAngular(0),
19b00333 57 fCircular(0),
58 fClusterMap(159),
59 fSharedMap(159)
32fab534 60{
81e97e0d 61 //
5c09947e 62 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 63 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
64 for (Int_t i=0;i<3;i++) fKinkIndexes[i]=0;
32fab534 65 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=0.2;
66 for (Int_t i=0;i<4;i++) {
67 fDEDX[i] = 0.;
68 fSDEDX[i] = 1e10;
69 fNCDEDX[i] = 0;
70 }
71 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
bfb57b6c 72 // for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
73 //for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
74 fClusterMap.ResetAllBits(kFALSE);
75 fSharedMap.ResetAllBits(kFALSE);
76
81e97e0d 77}
32fab534 78
2928bdf0 79AliTPCseed::AliTPCseed(const AliTPCseed &s, Bool_t clusterOwner):
32fab534 80 AliTPCtrack(s),
81 fEsd(0x0),
2928bdf0 82 fClusterOwner(clusterOwner),
32fab534 83 fPoints(0x0),
84 fEPoints(0x0),
85 fRow(0),
86 fSector(-1),
87 fRelativeSector(-1),
88 fCurrentSigmaY2(1e10),
89 fCurrentSigmaZ2(1e10),
90 fErrorY2(1e10),
91 fErrorZ2(1e10),
92 fCurrentCluster(0x0),
93 fCurrentClusterIndex1(-1),
94 fInDead(kFALSE),
95 fIsSeeding(kFALSE),
96 fNoCluster(0),
97 fSort(0),
98 fBSigned(kFALSE),
99 fSeedType(0),
100 fSeed1(-1),
101 fSeed2(-1),
102 fMAngular(0),
19b00333 103 fCircular(0),
104 fClusterMap(s.fClusterMap),
105 fSharedMap(s.fSharedMap)
32fab534 106{
81e97e0d 107 //---------------------
108 // dummy copy constructor
109 //-------------------------
2928bdf0 110 for (Int_t i=0;i<160;i++) {
111 fClusterPointer[i]=0;
112 if (fClusterOwner){
113 if (s.fClusterPointer[i])
114 fClusterPointer[i] = new AliTPCclusterMI(*(s.fClusterPointer[i]));
115 }else{
116 fClusterPointer[i] = s.fClusterPointer[i];
117 }
118 fTrackPoints[i] = s.fTrackPoints[i];
119 }
81e97e0d 120 for (Int_t i=0;i<160;i++) fIndex[i] = s.fIndex[i];
5c09947e 121 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=s.fTPCr[i];
122 for (Int_t i=0;i<4;i++) {
123 fDEDX[i] = s.fDEDX[i];
124 fSDEDX[i] = s.fSDEDX[i];
125 fNCDEDX[i] = s.fNCDEDX[i];
126 }
127 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = s.fOverlapLabels[i];
19b00333 128
81e97e0d 129}
5c09947e 130
131
32fab534 132AliTPCseed::AliTPCseed(const AliTPCtrack &t):
133 AliTPCtrack(t),
134 fEsd(0x0),
2928bdf0 135 fClusterOwner(kFALSE),
32fab534 136 fPoints(0x0),
137 fEPoints(0x0),
138 fRow(0),
139 fSector(-1),
140 fRelativeSector(-1),
141 fCurrentSigmaY2(1e10),
142 fCurrentSigmaZ2(1e10),
143 fErrorY2(1e10),
144 fErrorZ2(1e10),
145 fCurrentCluster(0x0),
146 fCurrentClusterIndex1(-1),
147 fInDead(kFALSE),
148 fIsSeeding(kFALSE),
149 fNoCluster(0),
150 fSort(0),
151 fBSigned(kFALSE),
152 fSeedType(0),
153 fSeed1(-1),
154 fSeed2(-1),
155 fMAngular(0),
19b00333 156 fCircular(0),
157 fClusterMap(159),
158 fSharedMap(159)
32fab534 159{
81e97e0d 160 //
32fab534 161 // Constructor from AliTPCtrack
162 //
163 fFirstPoint =0;
105b1b81 164 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
81e97e0d 165 for (Int_t i=0;i<160;i++) {
166 fClusterPointer[i] = 0;
167 Int_t index = t.GetClusterIndex(i);
168 if (index>=-1){
169 SetClusterIndex2(i,index);
170 }
171 else{
172 SetClusterIndex2(i,-3);
173 }
174 }
32fab534 175 for (Int_t i=0;i<4;i++) {
176 fDEDX[i] = 0.;
177 fSDEDX[i] = 1e10;
178 fNCDEDX[i] = 0;
179 }
180 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
bfb57b6c 181
182 //for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
183 //for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
184 fClusterMap.ResetAllBits(kFALSE);
185 fSharedMap.ResetAllBits(kFALSE);
186
81e97e0d 187}
188
6c94f330 189AliTPCseed::AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5],
190 const Double_t cc[15], Int_t index):
191 AliTPCtrack(xr, alpha, xx, cc, index),
32fab534 192 fEsd(0x0),
2928bdf0 193 fClusterOwner(kFALSE),
32fab534 194 fPoints(0x0),
195 fEPoints(0x0),
196 fRow(0),
197 fSector(-1),
198 fRelativeSector(-1),
199 fCurrentSigmaY2(1e10),
200 fCurrentSigmaZ2(1e10),
201 fErrorY2(1e10),
202 fErrorZ2(1e10),
203 fCurrentCluster(0x0),
204 fCurrentClusterIndex1(-1),
205 fInDead(kFALSE),
206 fIsSeeding(kFALSE),
207 fNoCluster(0),
208 fSort(0),
209 fBSigned(kFALSE),
210 fSeedType(0),
211 fSeed1(-1),
212 fSeed2(-1),
213 fMAngular(0),
19b00333 214 fCircular(0),
215 fClusterMap(159),
216 fSharedMap(159)
32fab534 217{
218 //
219 // Constructor
81e97e0d 220 //
32fab534 221 fFirstPoint =0;
5c09947e 222 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 223 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
81e97e0d 224 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
32fab534 225 for (Int_t i=0;i<4;i++) {
226 fDEDX[i] = 0.;
227 fSDEDX[i] = 1e10;
228 fNCDEDX[i] = 0;
229 }
230 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81e97e0d 231}
232
233AliTPCseed::~AliTPCseed(){
234 //
235 // destructor
236 if (fPoints) delete fPoints;
237 fPoints =0;
238 if (fEPoints) delete fEPoints;
239 fEPoints = 0;
240 fNoCluster =0;
2928bdf0 241 if (fClusterOwner){
242 for (Int_t icluster=0; icluster<160; icluster++){
243 delete fClusterPointer[icluster];
244 }
245 }
bfb57b6c 246
81e97e0d 247}
179c6296 248//_________________________________________________
316c6cd9 249AliTPCseed & AliTPCseed::operator=(const AliTPCseed &param)
179c6296 250{
251 //
316c6cd9 252 // assignment operator
179c6296 253 //
316c6cd9 254 if(this!=&param){
255 AliTPCtrack::operator=(param);
256 fEsd =param.fEsd;
257 for(Int_t i = 0;i<160;++i)fClusterPointer[i] = param.fClusterPointer[i]; // this is not allocated by AliTPCSeed
258 fClusterOwner = param.fClusterOwner;
259 // leave out fPoint, they are also not copied in the copy ctor...
260 // but deleted in the dtor... strange...
261 // fPoints =
262 // fEPoints =
263 fRow = param.fRow;
264 fSector = param.fSector;
265 fRelativeSector = param.fRelativeSector;
266 fCurrentSigmaY2 = param.fCurrentSigmaY2;
267 fCurrentSigmaZ2 = param.fCurrentSigmaZ2;
268 fErrorY2 = param.fErrorY2;
269 fErrorZ2 = param.fErrorZ2;
270 fCurrentCluster = param.fCurrentCluster; // this is not allocated by AliTPCSeed
271 fCurrentClusterIndex1 = param.fCurrentClusterIndex1;
272 fInDead = param.fInDead;
273 fIsSeeding = param.fIsSeeding;
274 fNoCluster = param.fNoCluster;
275 fSort = param.fSort;
276 fBSigned = param.fBSigned;
277 for(Int_t i = 0;i<4;++i){
278 fDEDX[i] = param.fDEDX[i];
279 fSDEDX[i] = param.fSDEDX[i];
280 fNCDEDX[i] = param.fNCDEDX[i];
281 }
282 for(Int_t i = 0;i<AliPID::kSPECIES;++i)fTPCr[i] = param.fTPCr[i];
283
284 fSeedType = param.fSeedType;
285 fSeed1 = param.fSeed1;
286 fSeed2 = param.fSeed2;
287 for(Int_t i = 0;i<12;++i)fOverlapLabels[i] = param.fOverlapLabels[i];
288 fMAngular = param.fMAngular;
289 fCircular = param.fCircular;
290 for(int i = 0;i<160;++i)fTrackPoints[i] = param.fTrackPoints[i];
291 fClusterMap = param.fClusterMap;
292 fSharedMap = param.fSharedMap;
293 }
179c6296 294 return (*this);
295}
296//____________________________________________________
81e97e0d 297AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
298{
299 //
300 //
301 return &fTrackPoints[i];
302}
303
304void AliTPCseed::RebuildSeed()
305{
306 //
307 // rebuild seed to be ready for storing
308 AliTPCclusterMI cldummy;
309 cldummy.SetQ(0);
310 AliTPCTrackPoint pdummy;
b9671574 311 pdummy.GetTPoint().SetShared(10);
81e97e0d 312 for (Int_t i=0;i<160;i++){
313 AliTPCclusterMI * cl0 = fClusterPointer[i];
314 AliTPCTrackPoint *trpoint = (AliTPCTrackPoint*)fPoints->UncheckedAt(i);
315 if (cl0){
316 trpoint->GetTPoint() = *(GetTrackPoint(i));
317 trpoint->GetCPoint() = *cl0;
318 trpoint->GetCPoint().SetQ(TMath::Abs(cl0->GetQ()));
319 }
320 else{
321 *trpoint = pdummy;
322 trpoint->GetCPoint()= cldummy;
323 }
324
325 }
326
327}
328
329
330Double_t AliTPCseed::GetDensityFirst(Int_t n)
331{
332 //
333 //
334 // return cluster for n rows bellow first point
335 Int_t nfoundable = 1;
336 Int_t nfound = 1;
337 for (Int_t i=fLastPoint-1;i>0&&nfoundable<n; i--){
338 Int_t index = GetClusterIndex2(i);
339 if (index!=-1) nfoundable++;
340 if (index>0) nfound++;
341 }
342 if (nfoundable<n) return 0;
343 return Double_t(nfound)/Double_t(nfoundable);
344
345}
346
347
348void AliTPCseed::GetClusterStatistic(Int_t first, Int_t last, Int_t &found, Int_t &foundable, Int_t &shared, Bool_t plus2)
349{
350 // get cluster stat. on given region
351 //
352 found = 0;
353 foundable = 0;
354 shared =0;
355 for (Int_t i=first;i<last; i++){
356 Int_t index = GetClusterIndex2(i);
357 if (index!=-1) foundable++;
6d493ea0 358 if (index&0x8000) continue;
81e97e0d 359 if (fClusterPointer[i]) {
360 found++;
361 }
362 else
363 continue;
364
365 if (fClusterPointer[i]->IsUsed(10)) {
366 shared++;
367 continue;
368 }
369 if (!plus2) continue; //take also neighborhoud
370 //
371 if ( (i>0) && fClusterPointer[i-1]){
372 if (fClusterPointer[i-1]->IsUsed(10)) {
373 shared++;
374 continue;
375 }
376 }
377 if ( fClusterPointer[i+1]){
378 if (fClusterPointer[i+1]->IsUsed(10)) {
379 shared++;
380 continue;
381 }
382 }
383
384 }
385 //if (shared>found){
386 //Error("AliTPCseed::GetClusterStatistic","problem\n");
387 //}
388}
389
390
391
392
393
394void AliTPCseed::Reset(Bool_t all)
395{
396 //
397 //
398 SetNumberOfClusters(0);
399 fNFoundable = 0;
400 SetChi2(0);
6c94f330 401 ResetCovariance(10.);
81e97e0d 402 /*
403 if (fTrackPoints){
404 for (Int_t i=0;i<8;i++){
405 delete [] fTrackPoints[i];
406 }
407 delete fTrackPoints;
408 fTrackPoints =0;
409 }
410 */
411
412 if (all){
413 for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
414 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
415 }
416
417}
418
419
420void AliTPCseed::Modify(Double_t factor)
421{
422
423 //------------------------------------------------------------------
424 //This function makes a track forget its history :)
425 //------------------------------------------------------------------
426 if (factor<=0) {
6c94f330 427 ResetCovariance(10.);
81e97e0d 428 return;
429 }
6c94f330 430 ResetCovariance(factor);
431
81e97e0d 432 SetNumberOfClusters(0);
433 fNFoundable =0;
434 SetChi2(0);
435 fRemoval = 0;
436 fCurrentSigmaY2 = 0.000005;
437 fCurrentSigmaZ2 = 0.000005;
438 fNoCluster = 0;
439 //fFirstPoint = 160;
440 //fLastPoint = 0;
441}
442
443
444
445
446Int_t AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
447{
448 //-----------------------------------------------------------------
449 // This function find proloncation of a track to a reference plane x=xk.
450 // doesn't change internal state of the track
451 //-----------------------------------------------------------------
452
6c94f330 453 Double_t x1=GetX(), x2=x1+(xk-x1), dx=x2-x1;
81e97e0d 454
6c94f330 455 if (TMath::Abs(GetSnp()+GetC()*dx) >= AliTPCReconstructor::GetMaxSnpTrack()) {
81e97e0d 456 return 0;
457 }
458
459 // Double_t y1=fP0, z1=fP1;
6c94f330 460 Double_t c1=GetSnp(), r1=sqrt(1.- c1*c1);
461 Double_t c2=c1 + GetC()*dx, r2=sqrt(1.- c2*c2);
81e97e0d 462
6c94f330 463 y = GetY();
464 z = GetZ();
81e97e0d 465 //y += dx*(c1+c2)/(r1+r2);
466 //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
467
468 Double_t dy = dx*(c1+c2)/(r1+r2);
469 Double_t dz = 0;
470 //
6c94f330 471 Double_t delta = GetC()*dx*(c1+c2)/(c1*r2 + c2*r1);
81e97e0d 472 /*
473 if (TMath::Abs(delta)>0.0001){
474 dz = fP3*TMath::ASin(delta)/fP4;
475 }else{
476 dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
477 }
478 */
479 // dz = fP3*AliTPCFastMath::FastAsin(delta)/fP4;
6c94f330 480 dz = GetTgl()*TMath::ASin(delta)/GetC();
81e97e0d 481 //
482 y+=dy;
483 z+=dz;
484
485
486 return 1;
487}
488
489
490//_____________________________________________________________________________
af32720d 491Double_t AliTPCseed::GetPredictedChi2(const AliCluster *c) const
81e97e0d 492{
493 //-----------------------------------------------------------------
494 // This function calculates a predicted chi2 increment.
495 //-----------------------------------------------------------------
6c94f330 496 Double_t p[2]={c->GetY(), c->GetZ()};
497 Double_t cov[3]={fErrorY2, 0., fErrorZ2};
498 return AliExternalTrackParam::GetPredictedChi2(p,cov);
81e97e0d 499}
500
81e97e0d 501//_________________________________________________________________________________________
502
503
504Int_t AliTPCseed::Compare(const TObject *o) const {
505 //-----------------------------------------------------------------
506 // This function compares tracks according to the sector - for given sector according z
507 //-----------------------------------------------------------------
508 AliTPCseed *t=(AliTPCseed*)o;
6c94f330 509
81e97e0d 510 if (fSort == 0){
511 if (t->fRelativeSector>fRelativeSector) return -1;
512 if (t->fRelativeSector<fRelativeSector) return 1;
513 Double_t z2 = t->GetZ();
514 Double_t z1 = GetZ();
515 if (z2>z1) return 1;
516 if (z2<z1) return -1;
517 return 0;
518 }
519 else {
520 Float_t f2 =1;
6c23ffed 521 f2 = 1-20*TMath::Sqrt(t->GetSigma1Pt2())/(t->OneOverPt()+0.0066);
81e97e0d 522 if (t->fBConstrain) f2=1.2;
523
524 Float_t f1 =1;
6c23ffed 525 f1 = 1-20*TMath::Sqrt(GetSigma1Pt2())/(OneOverPt()+0.0066);
81e97e0d 526
527 if (fBConstrain) f1=1.2;
528
529 if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
530 else return +1;
531 }
532}
533
534
535
536
537//_____________________________________________________________________________
70e20dcf 538Bool_t AliTPCseed::Update(const AliCluster *c, Double_t chisq, Int_t index)
6c94f330 539{
81e97e0d 540 //-----------------------------------------------------------------
541 // This function associates a cluster with this track.
542 //-----------------------------------------------------------------
81e97e0d 543 Int_t n=GetNumberOfClusters();
70e20dcf 544 Int_t idx=GetClusterIndex(n); // save the current cluster index
545
546 AliCluster cl(*c); cl.SetSigmaY2(fErrorY2); cl.SetSigmaZ2(fErrorZ2);
547 if (!AliTPCtrack::Update(&cl,chisq,index)) return kFALSE;
81e97e0d 548
70e20dcf 549 SetClusterIndex(n,idx); // restore the current cluster index
6c94f330 550 return kTRUE;
81e97e0d 551}
552
553
554
555//_____________________________________________________________________________
105b1b81 556Float_t AliTPCseed::CookdEdx(Double_t low, Double_t up,Int_t i1, Int_t i2, Bool_t onlyused) {
81e97e0d 557 //-----------------------------------------------------------------
558 // This funtion calculates dE/dX within the "low" and "up" cuts.
559 //-----------------------------------------------------------------
560
561 Float_t amp[200];
562 Float_t angular[200];
563 Float_t weight[200];
564 Int_t index[200];
565 //Int_t nc = 0;
566 // TClonesArray & arr = *fPoints;
567 Float_t meanlog = 100.;
568
569 Float_t mean[4] = {0,0,0,0};
570 Float_t sigma[4] = {1000,1000,1000,1000};
571 Int_t nc[4] = {0,0,0,0};
572 Float_t norm[4] = {1000,1000,1000,1000};
573 //
574 //
575 fNShared =0;
576
577 for (Int_t of =0; of<4; of++){
578 for (Int_t i=of+i1;i<i2;i+=4)
579 {
580 Int_t index = fIndex[i];
581 if (index<0||index&0x8000) continue;
582
583 //AliTPCTrackPoint * point = (AliTPCTrackPoint *) arr.At(i);
584 AliTPCTrackerPoint * point = GetTrackPoint(i);
585 //AliTPCTrackerPoint * pointm = GetTrackPoint(i-1);
586 //AliTPCTrackerPoint * pointp = 0;
587 //if (i<159) pointp = GetTrackPoint(i+1);
588
589 if (point==0) continue;
590 AliTPCclusterMI * cl = fClusterPointer[i];
591 if (cl==0) continue;
592 if (onlyused && (!cl->IsUsed(10))) continue;
593 if (cl->IsUsed(11)) {
594 fNShared++;
595 continue;
596 }
597 Int_t type = cl->GetType();
598 //if (point->fIsShared){
599 // fNShared++;
600 // continue;
601 //}
602 //if (pointm)
603 // if (pointm->fIsShared) continue;
604 //if (pointp)
605 // if (pointp->fIsShared) continue;
606
607 if (type<0) continue;
608 //if (type>10) continue;
609 //if (point->GetErrY()==0) continue;
610 //if (point->GetErrZ()==0) continue;
611
612 //Float_t ddy = (point->GetY()-cl->GetY())/point->GetErrY();
613 //Float_t ddz = (point->GetZ()-cl->GetZ())/point->GetErrZ();
614 //if ((ddy*ddy+ddz*ddz)>10) continue;
615
616
617 // if (point->GetCPoint().GetMax()<5) continue;
618 if (cl->GetMax()<5) continue;
619 Float_t angley = point->GetAngleY();
620 Float_t anglez = point->GetAngleZ();
621
622 Float_t rsigmay2 = point->GetSigmaY();
623 Float_t rsigmaz2 = point->GetSigmaZ();
624 /*
625 Float_t ns = 1.;
626 if (pointm){
627 rsigmay += pointm->GetTPoint().GetSigmaY();
628 rsigmaz += pointm->GetTPoint().GetSigmaZ();
629 ns+=1.;
630 }
631 if (pointp){
632 rsigmay += pointp->GetTPoint().GetSigmaY();
633 rsigmaz += pointp->GetTPoint().GetSigmaZ();
634 ns+=1.;
635 }
636 rsigmay/=ns;
637 rsigmaz/=ns;
638 */
639
640 Float_t rsigma = TMath::Sqrt(rsigmay2*rsigmaz2);
641
642 Float_t ampc = 0; // normalization to the number of electrons
643 if (i>64){
644 // ampc = 1.*point->GetCPoint().GetMax();
645 ampc = 1.*cl->GetMax();
646 //ampc = 1.*point->GetCPoint().GetQ();
647 // AliTPCClusterPoint & p = point->GetCPoint();
648 // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.6)) - TMath::Abs(p.GetY()/0.6)+0.5);
649 // Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
650 //Float_t dz =
651 // TMath::Abs( Int_t(iz) - iz + 0.5);
652 //ampc *= 1.15*(1-0.3*dy);
653 //ampc *= 1.15*(1-0.3*dz);
654 // Float_t zfactor = (AliTPCReconstructor::GetCtgRange()-0.0004*TMath::Abs(point->GetCPoint().GetZ()));
655 //ampc *=zfactor;
656 }
657 else{
658 //ampc = 1.0*point->GetCPoint().GetMax();
659 ampc = 1.0*cl->GetMax();
660 //ampc = 1.0*point->GetCPoint().GetQ();
661 //AliTPCClusterPoint & p = point->GetCPoint();
662 // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.4)) - TMath::Abs(p.GetY()/0.4)+0.5);
663 //Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
664 //Float_t dz =
665 // TMath::Abs( Int_t(iz) - iz + 0.5);
666
667 //ampc *= 1.15*(1-0.3*dy);
668 //ampc *= 1.15*(1-0.3*dz);
669 // Float_t zfactor = (1.02-0.000*TMath::Abs(point->GetCPoint().GetZ()));
670 //ampc *=zfactor;
671
672 }
673 ampc *= 2.0; // put mean value to channel 50
674 //ampc *= 0.58; // put mean value to channel 50
675 Float_t w = 1.;
676 // if (type>0) w = 1./(type/2.-0.5);
677 // Float_t z = TMath::Abs(cl->GetZ());
678 if (i<64) {
679 ampc /= 0.6;
680 //ampc /= (1+0.0008*z);
681 } else
682 if (i>128){
683 ampc /=1.5;
684 //ampc /= (1+0.0008*z);
685 }else{
686 //ampc /= (1+0.0008*z);
687 }
688
689 if (type<0) { //amp at the border - lower weight
690 // w*= 2.;
691
692 continue;
693 }
694 if (rsigma>1.5) ampc/=1.3; // if big backround
695 amp[nc[of]] = ampc;
696 angular[nc[of]] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
697 weight[nc[of]] = w;
698 nc[of]++;
699 }
700
701 TMath::Sort(nc[of],amp,index,kFALSE);
702 Float_t sumamp=0;
703 Float_t sumamp2=0;
704 Float_t sumw=0;
705 //meanlog = amp[index[Int_t(nc[of]*0.33)]];
706 meanlog = 50;
707 for (Int_t i=int(nc[of]*low+0.5);i<int(nc[of]*up+0.5);i++){
708 Float_t ampl = amp[index[i]]/angular[index[i]];
709 ampl = meanlog*TMath::Log(1.+ampl/meanlog);
710 //
711 sumw += weight[index[i]];
712 sumamp += weight[index[i]]*ampl;
713 sumamp2 += weight[index[i]]*ampl*ampl;
714 norm[of] += angular[index[i]]*weight[index[i]];
715 }
716 if (sumw<1){
717 SetdEdx(0);
718 }
719 else {
720 norm[of] /= sumw;
721 mean[of] = sumamp/sumw;
722 sigma[of] = sumamp2/sumw-mean[of]*mean[of];
723 if (sigma[of]>0.1)
724 sigma[of] = TMath::Sqrt(sigma[of]);
725 else
726 sigma[of] = 1000;
727
728 mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
729 //mean *=(1-0.02*(sigma/(mean*0.17)-1.));
730 //mean *=(1-0.1*(norm-1.));
731 }
732 }
733
734 Float_t dedx =0;
735 fSdEdx =0;
736 fMAngular =0;
737 // mean[0]*= (1-0.05*(sigma[0]/(0.01+mean[1]*0.18)-1));
738 // mean[1]*= (1-0.05*(sigma[1]/(0.01+mean[0]*0.18)-1));
739
740
741 // dedx = (mean[0]* TMath::Sqrt((1.+nc[0]))+ mean[1]* TMath::Sqrt((1.+nc[1])) )/
742 // ( TMath::Sqrt((1.+nc[0]))+TMath::Sqrt((1.+nc[1])));
743
744 Int_t norm2 = 0;
745 Int_t norm3 = 0;
746 for (Int_t i =0;i<4;i++){
747 if (nc[i]>2&&nc[i]<1000){
748 dedx += mean[i] *nc[i];
749 fSdEdx += sigma[i]*(nc[i]-2);
750 fMAngular += norm[i] *nc[i];
751 norm2 += nc[i];
752 norm3 += nc[i]-2;
753 }
754 fDEDX[i] = mean[i];
755 fSDEDX[i] = sigma[i];
756 fNCDEDX[i]= nc[i];
757 }
758
759 if (norm3>0){
760 dedx /=norm2;
761 fSdEdx /=norm3;
762 fMAngular/=norm2;
763 }
764 else{
765 SetdEdx(0);
105b1b81 766 return 0;
81e97e0d 767 }
768 // Float_t dedx1 =dedx;
769 /*
770 dedx =0;
771 for (Int_t i =0;i<4;i++){
772 if (nc[i]>2&&nc[i]<1000){
773 mean[i] = mean[i]*(1-0.12*(sigma[i]/(fSdEdx)-1.));
774 dedx += mean[i] *nc[i];
775 }
776 fDEDX[i] = mean[i];
777 }
778 dedx /= norm2;
779 */
780
781
782 SetdEdx(dedx);
a2d457f2 783 return dedx;
81e97e0d 784}
785Double_t AliTPCseed::Bethe(Double_t bg){
786 //
787 // This is the Bethe-Bloch function normalised to 1 at the minimum
788 //
789 Double_t bg2=bg*bg;
790 Double_t bethe;
791 if (bg<3.5e1)
792 bethe=(1.+ bg2)/bg2*(log(5940*bg2) - bg2/(1.+ bg2));
793 else // Density effect ( approximately :)
794 bethe=1.15*(1.+ bg2)/bg2*(log(3.5*5940*bg) - bg2/(1.+ bg2));
795 return bethe/11.091;
796}
797
798void AliTPCseed::CookPID()
799{
800 //
801 // cook PID information according dEdx
802 //
803 Double_t fRange = 10.;
804 Double_t fRes = 0.1;
805 Double_t fMIP = 47.;
806 //
807 Int_t ns=AliPID::kSPECIES;
808 Double_t sumr =0;
809 for (Int_t j=0; j<ns; j++) {
810 Double_t mass=AliPID::ParticleMass(j);
6c94f330 811 Double_t mom=GetP();
81e97e0d 812 Double_t dedx=fdEdx/fMIP;
813 Double_t bethe=Bethe(mom/mass);
814 Double_t sigma=fRes*bethe;
815 if (sigma>0.001){
816 if (TMath::Abs(dedx-bethe) > fRange*sigma) {
817 fTPCr[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
818 sumr+=fTPCr[j];
819 continue;
820 }
821 fTPCr[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
822 sumr+=fTPCr[j];
823 }
824 else{
825 fTPCr[j]=1.;
826 sumr+=fTPCr[j];
827 }
828 }
829 for (Int_t j=0; j<ns; j++) {
830 fTPCr[j]/=sumr; //normalize
831 }
832}
833
834/*
835void AliTPCseed::CookdEdx2(Double_t low, Double_t up) {
836 //-----------------------------------------------------------------
837 // This funtion calculates dE/dX within the "low" and "up" cuts.
838 //-----------------------------------------------------------------
839
840 Float_t amp[200];
841 Float_t angular[200];
842 Float_t weight[200];
843 Int_t index[200];
844 Bool_t inlimit[200];
845 for (Int_t i=0;i<200;i++) inlimit[i]=kFALSE;
846 for (Int_t i=0;i<200;i++) amp[i]=10000;
847 for (Int_t i=0;i<200;i++) angular[i]= 1;;
848
849
850 //
851 Float_t meanlog = 100.;
852 Int_t indexde[4]={0,64,128,160};
853
854 Float_t amean =0;
855 Float_t asigma =0;
856 Float_t anc =0;
857 Float_t anorm =0;
858
859 Float_t mean[4] = {0,0,0,0};
860 Float_t sigma[4] = {1000,1000,1000,1000};
861 Int_t nc[4] = {0,0,0,0};
862 Float_t norm[4] = {1000,1000,1000,1000};
863 //
864 //
865 fNShared =0;
866
867 // for (Int_t of =0; of<3; of++){
868 // for (Int_t i=indexde[of];i<indexde[of+1];i++)
869 for (Int_t i =0; i<160;i++)
870 {
871 AliTPCTrackPoint * point = GetTrackPoint(i);
872 if (point==0) continue;
873 if (point->fIsShared){
874 fNShared++;
875 continue;
876 }
877 Int_t type = point->GetCPoint().GetType();
878 if (type<0) continue;
879 if (point->GetCPoint().GetMax()<5) continue;
880 Float_t angley = point->GetTPoint().GetAngleY();
881 Float_t anglez = point->GetTPoint().GetAngleZ();
882 Float_t rsigmay = point->GetCPoint().GetSigmaY();
883 Float_t rsigmaz = point->GetCPoint().GetSigmaZ();
884 Float_t rsigma = TMath::Sqrt(rsigmay*rsigmaz);
885
886 Float_t ampc = 0; // normalization to the number of electrons
887 if (i>64){
888 ampc = point->GetCPoint().GetMax();
889 }
890 else{
891 ampc = point->GetCPoint().GetMax();
892 }
893 ampc *= 2.0; // put mean value to channel 50
894 // ampc *= 0.565; // put mean value to channel 50
895
896 Float_t w = 1.;
897 Float_t z = TMath::Abs(point->GetCPoint().GetZ());
898 if (i<64) {
899 ampc /= 0.63;
900 } else
901 if (i>128){
902 ampc /=1.51;
903 }
904 if (type<0) { //amp at the border - lower weight
905 continue;
906 }
907 if (rsigma>1.5) ampc/=1.3; // if big backround
908 angular[i] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
909 amp[i] = ampc/angular[i];
910 weight[i] = w;
911 anc++;
912 }
913
914 TMath::Sort(159,amp,index,kFALSE);
915 for (Int_t i=int(anc*low+0.5);i<int(anc*up+0.5);i++){
916 inlimit[index[i]] = kTRUE; // take all clusters
917 }
918
919 // meanlog = amp[index[Int_t(anc*0.3)]];
920 meanlog =10000.;
921 for (Int_t of =0; of<3; of++){
922 Float_t sumamp=0;
923 Float_t sumamp2=0;
924 Float_t sumw=0;
925 for (Int_t i=indexde[of];i<indexde[of+1];i++)
926 {
927 if (inlimit[i]==kFALSE) continue;
928 Float_t ampl = amp[i];
929 ///angular[i];
930 ampl = meanlog*TMath::Log(1.+ampl/meanlog);
931 //
932 sumw += weight[i];
933 sumamp += weight[i]*ampl;
934 sumamp2 += weight[i]*ampl*ampl;
935 norm[of] += angular[i]*weight[i];
936 nc[of]++;
937 }
938 if (sumw<1){
939 SetdEdx(0);
940 }
941 else {
942 norm[of] /= sumw;
943 mean[of] = sumamp/sumw;
944 sigma[of] = sumamp2/sumw-mean[of]*mean[of];
945 if (sigma[of]>0.1)
946 sigma[of] = TMath::Sqrt(sigma[of]);
947 else
948 sigma[of] = 1000;
949 mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
950 }
951 }
952
953 Float_t dedx =0;
954 fSdEdx =0;
955 fMAngular =0;
956 //
957 Int_t norm2 = 0;
958 Int_t norm3 = 0;
959 Float_t www[3] = {12.,14.,17.};
960 //Float_t www[3] = {1.,1.,1.};
961
962 for (Int_t i =0;i<3;i++){
963 if (nc[i]>2&&nc[i]<1000){
964 dedx += mean[i] *nc[i]*www[i]/sigma[i];
965 fSdEdx += sigma[i]*(nc[i]-2)*www[i]/sigma[i];
966 fMAngular += norm[i] *nc[i];
967 norm2 += nc[i]*www[i]/sigma[i];
968 norm3 += (nc[i]-2)*www[i]/sigma[i];
969 }
970 fDEDX[i] = mean[i];
971 fSDEDX[i] = sigma[i];
972 fNCDEDX[i]= nc[i];
973 }
974
975 if (norm3>0){
976 dedx /=norm2;
977 fSdEdx /=norm3;
978 fMAngular/=norm2;
979 }
980 else{
981 SetdEdx(0);
982 return;
983 }
984 // Float_t dedx1 =dedx;
985
986 dedx =0;
987 Float_t norm4 = 0;
988 for (Int_t i =0;i<3;i++){
989 if (nc[i]>2&&nc[i]<1000&&sigma[i]>3){
990 //mean[i] = mean[i]*(1+0.08*(sigma[i]/(fSdEdx)-1.));
991 dedx += mean[i] *(nc[i])/(sigma[i]);
992 norm4 += (nc[i])/(sigma[i]);
993 }
994 fDEDX[i] = mean[i];
995 }
996 if (norm4>0) dedx /= norm4;
997
998
999
1000 SetdEdx(dedx);
1001
1002 //mi deDX
1003
1004}
1005*/
6c94f330 1006Double_t AliTPCseed::GetYat(Double_t xk) const {
1007//-----------------------------------------------------------------
1008// This function calculates the Y-coordinate of a track at the plane x=xk.
1009//-----------------------------------------------------------------
1010 if (TMath::Abs(GetSnp())>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
1011 Double_t c1=GetSnp(), r1=TMath::Sqrt(1.- c1*c1);
1012 Double_t c2=c1+GetC()*(xk-GetX());
1013 if (TMath::Abs(c2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0;
1014 Double_t r2=TMath::Sqrt(1.- c2*c2);
1015 return GetY() + (xk-GetX())*(c1+c2)/(r1+r2);
1016}
1017
19b00333 1018void AliTPCseed::SetClusterMapBit(int ibit, Bool_t state)
1019{
1020 fClusterMap[ibit] = state;
1021}
1022Bool_t AliTPCseed::GetClusterMapBit(int ibit)
1023{
1024 return fClusterMap[ibit];
1025}
1026void AliTPCseed::SetSharedMapBit(int ibit, Bool_t state)
1027{
1028 fSharedMap[ibit] = state;
1029}
1030Bool_t AliTPCseed::GetSharedMapBit(int ibit)
1031{
1032 return fSharedMap[ibit];
1033}
eb02f63a 1034
1035
0a65832b 1036
1037
1038
1039Float_t AliTPCseed::CookdEdxNorm(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2){
1040
1041 //
1042 // calculates dedx using the cluster
1043 // low - up specify trunc mean range - default form 0-0.7
8076baa0 1044 // type - 1 - max charge or 0- total charge in cluster
1045 // //2- max no corr 3- total+ correction
0a65832b 1046 // i1-i2 - the pad-row range used for calculation
1047 //
1048 // normalization parametrization taken from AliTPCClusterParam
1049 //
1050 AliTPCClusterParam * parcl = AliTPCClusterParam::Instance();
1051 if (!parcl) return 0;
1052 Float_t amp[160];
1053 Int_t indexes[160];
1054 Int_t ncl=0;
1055 //
1056 //
1057 const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
1058 const Float_t kedgey =4.;
1059 //
1060 for (Int_t irow=i1; irow<i2; irow++){
1061 AliTPCclusterMI* cluster = GetClusterPointer(irow);
1062 if (!cluster) continue;
1063 if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
8076baa0 1064 Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
0a65832b 1065 //do normalization
1066 Float_t corr=1;
8076baa0 1067 Int_t ipad= 0;
1068 if (irow>62) ipad=1;
1069 if (irow>127) ipad=2;
0a65832b 1070 if (type<=1){
0a65832b 1071 //
1072 AliTPCTrackerPoint * point = GetTrackPoint(irow);
1073 Float_t ty = TMath::Abs(point->GetAngleY());
1074 Float_t tz = TMath::Abs(point->GetAngleZ());
1075
1076 Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
1077 corr = parcl->Qnorm(ipad,type,dr,ty,tz);
1078 }
1079 amp[ncl]=charge/corr;
8076baa0 1080
1081 amp[ncl] *= 2.0; // put mean value to channel 50
1082 if (ipad==0) {
1083 amp[ncl] /= 0.65; // this we will take form OCDB
1084 } else
1085 if (ipad==2){
1086 amp[ncl] /=1.57;
1087 }else{
1088 }
0a65832b 1089 ncl++;
1090 }
8076baa0 1091
0a65832b 1092 if (type>3) return ncl;
1093 TMath::Sort(ncl,amp, indexes, kFALSE);
1094
8076baa0 1095 if (ncl<10) return 0;
0a65832b 1096
1097 Float_t suma=0;
1098 Float_t sumn=0;
1099 Int_t icl0=TMath::Nint(ncl*low);
1100 Int_t icl1=TMath::Nint(ncl*up);
1101 for (Int_t icl=icl0; icl<icl1;icl++){
1102 suma+=amp[indexes[icl]];
1103 sumn++;
1104 }
1105 return suma/sumn;
1106
1107}
1108
1109Double_t AliTPCseed::BetheMass(Double_t mass){
1110 //
1111 // return bethe-bloch
1112 //
1113 Float_t bg= P()/mass;
1114 const Double_t kp1=0.76176e-1;
1115 const Double_t kp2=10.632;
1116 const Double_t kp3=0.13279e-4;
1117 const Double_t kp4=1.8631;
1118 const Double_t kp5=1.9479;
1119
1120 Double_t dbg = (Double_t) bg;
1121
1122 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1123
1124 Double_t aa = TMath::Power(beta,kp4);
1125 Double_t bb = TMath::Power(1./dbg,kp5);
1126
1127 bb=TMath::Log(kp3+bb);
1128
1129 return ((Float_t)((kp2-aa-bb)*kp1/aa));
1130}
1131
1132
eb02f63a 1133Float_t AliTPCseed::CookShape(Int_t type){
1134 //
1135 //
1136 //
1137 //-----------------------------------------------------------------
1138 // This funtion calculates dE/dX within the "low" and "up" cuts.
1139 //-----------------------------------------------------------------
1140 Float_t means=0;
1141 Float_t meanc=0;
1142 for (Int_t i =0; i<160;i++) {
1143 AliTPCTrackerPoint * point = GetTrackPoint(i);
1144 if (point==0) continue;
1145
1146 AliTPCclusterMI * cl = fClusterPointer[i];
1147 if (cl==0) continue;
1148
1149 Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
1150 Float_t rsigmaz = TMath::Sqrt(point->GetSigmaZ());
1151 Float_t rsigma = (rsigmay+rsigmaz)*0.5;
1152 if (type==0) means+=rsigma;
1153 if (type==1) means+=rsigmay;
1154 if (type==2) means+=rsigmaz;
1155 meanc++;
1156 }
1157 Float_t mean = (meanc>0)? means/meanc:0;
1158 return mean;
1159}