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Adding analytical formula for normalization of Energy deposit.
[u/mrichter/AliRoot.git] / TPC / AliTPCseed.cxx
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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"
7cd8ac3f 28#include "AliTPCCalPad.h"
29#include "AliTPCCalROC.h"
37540068 30#include "AliTPCcalibDB.h"
d080e4a4 31#include "AliTPCParam.h"
7cd8ac3f 32
33
81e97e0d 34
35ClassImp(AliTPCseed)
36
37
38
32fab534 39AliTPCseed::AliTPCseed():
40 AliTPCtrack(),
41 fEsd(0x0),
2928bdf0 42 fClusterOwner(kFALSE),
32fab534 43 fRow(0),
44 fSector(-1),
45 fRelativeSector(-1),
46 fCurrentSigmaY2(1e10),
47 fCurrentSigmaZ2(1e10),
e0e13b88 48 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
49 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 50 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
51 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
e0e13b88 52 //
32fab534 53 fErrorY2(1e10),
54 fErrorZ2(1e10),
55 fCurrentCluster(0x0),
56 fCurrentClusterIndex1(-1),
57 fInDead(kFALSE),
58 fIsSeeding(kFALSE),
59 fNoCluster(0),
60 fSort(0),
61 fBSigned(kFALSE),
62 fSeedType(0),
63 fSeed1(-1),
64 fSeed2(-1),
65 fMAngular(0),
19b00333 66 fCircular(0),
67 fClusterMap(159),
68 fSharedMap(159)
32fab534 69{
81e97e0d 70 //
5c09947e 71 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 72 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
73 for (Int_t i=0;i<3;i++) fKinkIndexes[i]=0;
32fab534 74 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=0.2;
75 for (Int_t i=0;i<4;i++) {
76 fDEDX[i] = 0.;
77 fSDEDX[i] = 1e10;
78 fNCDEDX[i] = 0;
79 }
80 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
bfb57b6c 81 // for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
82 //for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
83 fClusterMap.ResetAllBits(kFALSE);
84 fSharedMap.ResetAllBits(kFALSE);
85
81e97e0d 86}
32fab534 87
2928bdf0 88AliTPCseed::AliTPCseed(const AliTPCseed &s, Bool_t clusterOwner):
32fab534 89 AliTPCtrack(s),
90 fEsd(0x0),
2928bdf0 91 fClusterOwner(clusterOwner),
32fab534 92 fRow(0),
93 fSector(-1),
94 fRelativeSector(-1),
c07cb486 95 fCurrentSigmaY2(-1),
96 fCurrentSigmaZ2(-1),
e0e13b88 97 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
98 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 99 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
100 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
32fab534 101 fErrorY2(1e10),
102 fErrorZ2(1e10),
103 fCurrentCluster(0x0),
104 fCurrentClusterIndex1(-1),
105 fInDead(kFALSE),
106 fIsSeeding(kFALSE),
107 fNoCluster(0),
108 fSort(0),
109 fBSigned(kFALSE),
110 fSeedType(0),
111 fSeed1(-1),
112 fSeed2(-1),
113 fMAngular(0),
19b00333 114 fCircular(0),
115 fClusterMap(s.fClusterMap),
116 fSharedMap(s.fSharedMap)
32fab534 117{
81e97e0d 118 //---------------------
119 // dummy copy constructor
120 //-------------------------
2928bdf0 121 for (Int_t i=0;i<160;i++) {
122 fClusterPointer[i]=0;
123 if (fClusterOwner){
124 if (s.fClusterPointer[i])
125 fClusterPointer[i] = new AliTPCclusterMI(*(s.fClusterPointer[i]));
126 }else{
127 fClusterPointer[i] = s.fClusterPointer[i];
128 }
129 fTrackPoints[i] = s.fTrackPoints[i];
130 }
81e97e0d 131 for (Int_t i=0;i<160;i++) fIndex[i] = s.fIndex[i];
5c09947e 132 for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=s.fTPCr[i];
133 for (Int_t i=0;i<4;i++) {
134 fDEDX[i] = s.fDEDX[i];
135 fSDEDX[i] = s.fSDEDX[i];
136 fNCDEDX[i] = s.fNCDEDX[i];
137 }
138 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = s.fOverlapLabels[i];
19b00333 139
81e97e0d 140}
5c09947e 141
142
32fab534 143AliTPCseed::AliTPCseed(const AliTPCtrack &t):
144 AliTPCtrack(t),
145 fEsd(0x0),
2928bdf0 146 fClusterOwner(kFALSE),
32fab534 147 fRow(0),
148 fSector(-1),
149 fRelativeSector(-1),
c07cb486 150 fCurrentSigmaY2(-1),
151 fCurrentSigmaZ2(-1),
e0e13b88 152 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
153 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 154 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
155 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
32fab534 156 fErrorY2(1e10),
157 fErrorZ2(1e10),
158 fCurrentCluster(0x0),
159 fCurrentClusterIndex1(-1),
160 fInDead(kFALSE),
161 fIsSeeding(kFALSE),
162 fNoCluster(0),
163 fSort(0),
164 fBSigned(kFALSE),
165 fSeedType(0),
166 fSeed1(-1),
167 fSeed2(-1),
168 fMAngular(0),
19b00333 169 fCircular(0),
170 fClusterMap(159),
171 fSharedMap(159)
32fab534 172{
81e97e0d 173 //
32fab534 174 // Constructor from AliTPCtrack
175 //
176 fFirstPoint =0;
105b1b81 177 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
81e97e0d 178 for (Int_t i=0;i<160;i++) {
179 fClusterPointer[i] = 0;
180 Int_t index = t.GetClusterIndex(i);
181 if (index>=-1){
182 SetClusterIndex2(i,index);
183 }
184 else{
185 SetClusterIndex2(i,-3);
186 }
187 }
32fab534 188 for (Int_t i=0;i<4;i++) {
189 fDEDX[i] = 0.;
190 fSDEDX[i] = 1e10;
191 fNCDEDX[i] = 0;
192 }
193 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
bfb57b6c 194
195 //for (Int_t i=0;i<160;i++) fClusterMap[i]=kFALSE;
196 //for (Int_t i=0;i<160;i++) fSharedMap[i]=kFALSE;
197 fClusterMap.ResetAllBits(kFALSE);
198 fSharedMap.ResetAllBits(kFALSE);
199
81e97e0d 200}
201
6c94f330 202AliTPCseed::AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5],
203 const Double_t cc[15], Int_t index):
204 AliTPCtrack(xr, alpha, xx, cc, index),
32fab534 205 fEsd(0x0),
2928bdf0 206 fClusterOwner(kFALSE),
32fab534 207 fRow(0),
208 fSector(-1),
209 fRelativeSector(-1),
c07cb486 210 fCurrentSigmaY2(-1),
211 fCurrentSigmaZ2(-1),
e0e13b88 212 fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
213 fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
c07cb486 214 fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
215 fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
32fab534 216 fErrorY2(1e10),
217 fErrorZ2(1e10),
218 fCurrentCluster(0x0),
219 fCurrentClusterIndex1(-1),
220 fInDead(kFALSE),
221 fIsSeeding(kFALSE),
222 fNoCluster(0),
223 fSort(0),
224 fBSigned(kFALSE),
225 fSeedType(0),
226 fSeed1(-1),
227 fSeed2(-1),
228 fMAngular(0),
19b00333 229 fCircular(0),
230 fClusterMap(159),
231 fSharedMap(159)
32fab534 232{
233 //
234 // Constructor
81e97e0d 235 //
32fab534 236 fFirstPoint =0;
5c09947e 237 for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
81e97e0d 238 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
81e97e0d 239 for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
32fab534 240 for (Int_t i=0;i<4;i++) {
241 fDEDX[i] = 0.;
242 fSDEDX[i] = 1e10;
243 fNCDEDX[i] = 0;
244 }
245 for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
81e97e0d 246}
247
248AliTPCseed::~AliTPCseed(){
249 //
250 // destructor
81e97e0d 251 fNoCluster =0;
2928bdf0 252 if (fClusterOwner){
253 for (Int_t icluster=0; icluster<160; icluster++){
254 delete fClusterPointer[icluster];
255 }
256 }
bfb57b6c 257
81e97e0d 258}
179c6296 259//_________________________________________________
316c6cd9 260AliTPCseed & AliTPCseed::operator=(const AliTPCseed &param)
179c6296 261{
262 //
316c6cd9 263 // assignment operator
179c6296 264 //
316c6cd9 265 if(this!=&param){
266 AliTPCtrack::operator=(param);
267 fEsd =param.fEsd;
268 for(Int_t i = 0;i<160;++i)fClusterPointer[i] = param.fClusterPointer[i]; // this is not allocated by AliTPCSeed
269 fClusterOwner = param.fClusterOwner;
270 // leave out fPoint, they are also not copied in the copy ctor...
271 // but deleted in the dtor... strange...
316c6cd9 272 fRow = param.fRow;
273 fSector = param.fSector;
274 fRelativeSector = param.fRelativeSector;
275 fCurrentSigmaY2 = param.fCurrentSigmaY2;
276 fCurrentSigmaZ2 = param.fCurrentSigmaZ2;
277 fErrorY2 = param.fErrorY2;
278 fErrorZ2 = param.fErrorZ2;
279 fCurrentCluster = param.fCurrentCluster; // this is not allocated by AliTPCSeed
280 fCurrentClusterIndex1 = param.fCurrentClusterIndex1;
281 fInDead = param.fInDead;
282 fIsSeeding = param.fIsSeeding;
283 fNoCluster = param.fNoCluster;
284 fSort = param.fSort;
285 fBSigned = param.fBSigned;
286 for(Int_t i = 0;i<4;++i){
287 fDEDX[i] = param.fDEDX[i];
288 fSDEDX[i] = param.fSDEDX[i];
289 fNCDEDX[i] = param.fNCDEDX[i];
290 }
291 for(Int_t i = 0;i<AliPID::kSPECIES;++i)fTPCr[i] = param.fTPCr[i];
292
293 fSeedType = param.fSeedType;
294 fSeed1 = param.fSeed1;
295 fSeed2 = param.fSeed2;
296 for(Int_t i = 0;i<12;++i)fOverlapLabels[i] = param.fOverlapLabels[i];
297 fMAngular = param.fMAngular;
298 fCircular = param.fCircular;
299 for(int i = 0;i<160;++i)fTrackPoints[i] = param.fTrackPoints[i];
300 fClusterMap = param.fClusterMap;
301 fSharedMap = param.fSharedMap;
302 }
179c6296 303 return (*this);
304}
305//____________________________________________________
81e97e0d 306AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
307{
308 //
309 //
310 return &fTrackPoints[i];
311}
312
81e97e0d 313
314
315Double_t AliTPCseed::GetDensityFirst(Int_t n)
316{
317 //
318 //
319 // return cluster for n rows bellow first point
320 Int_t nfoundable = 1;
321 Int_t nfound = 1;
322 for (Int_t i=fLastPoint-1;i>0&&nfoundable<n; i--){
323 Int_t index = GetClusterIndex2(i);
324 if (index!=-1) nfoundable++;
325 if (index>0) nfound++;
326 }
327 if (nfoundable<n) return 0;
328 return Double_t(nfound)/Double_t(nfoundable);
329
330}
331
332
333void AliTPCseed::GetClusterStatistic(Int_t first, Int_t last, Int_t &found, Int_t &foundable, Int_t &shared, Bool_t plus2)
334{
335 // get cluster stat. on given region
336 //
337 found = 0;
338 foundable = 0;
339 shared =0;
340 for (Int_t i=first;i<last; i++){
341 Int_t index = GetClusterIndex2(i);
342 if (index!=-1) foundable++;
6d493ea0 343 if (index&0x8000) continue;
81e97e0d 344 if (fClusterPointer[i]) {
345 found++;
346 }
347 else
348 continue;
349
350 if (fClusterPointer[i]->IsUsed(10)) {
351 shared++;
352 continue;
353 }
354 if (!plus2) continue; //take also neighborhoud
355 //
356 if ( (i>0) && fClusterPointer[i-1]){
357 if (fClusterPointer[i-1]->IsUsed(10)) {
358 shared++;
359 continue;
360 }
361 }
362 if ( fClusterPointer[i+1]){
363 if (fClusterPointer[i+1]->IsUsed(10)) {
364 shared++;
365 continue;
366 }
367 }
368
369 }
370 //if (shared>found){
371 //Error("AliTPCseed::GetClusterStatistic","problem\n");
372 //}
373}
374
375
376
377
378
379void AliTPCseed::Reset(Bool_t all)
380{
381 //
382 //
383 SetNumberOfClusters(0);
384 fNFoundable = 0;
385 SetChi2(0);
6c94f330 386 ResetCovariance(10.);
81e97e0d 387 /*
388 if (fTrackPoints){
389 for (Int_t i=0;i<8;i++){
390 delete [] fTrackPoints[i];
391 }
392 delete fTrackPoints;
393 fTrackPoints =0;
394 }
395 */
396
397 if (all){
398 for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
399 for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
400 }
401
402}
403
404
405void AliTPCseed::Modify(Double_t factor)
406{
407
408 //------------------------------------------------------------------
409 //This function makes a track forget its history :)
410 //------------------------------------------------------------------
411 if (factor<=0) {
6c94f330 412 ResetCovariance(10.);
81e97e0d 413 return;
414 }
6c94f330 415 ResetCovariance(factor);
416
81e97e0d 417 SetNumberOfClusters(0);
418 fNFoundable =0;
419 SetChi2(0);
420 fRemoval = 0;
421 fCurrentSigmaY2 = 0.000005;
422 fCurrentSigmaZ2 = 0.000005;
423 fNoCluster = 0;
424 //fFirstPoint = 160;
425 //fLastPoint = 0;
426}
427
428
429
430
431Int_t AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
432{
433 //-----------------------------------------------------------------
434 // This function find proloncation of a track to a reference plane x=xk.
435 // doesn't change internal state of the track
436 //-----------------------------------------------------------------
437
6c94f330 438 Double_t x1=GetX(), x2=x1+(xk-x1), dx=x2-x1;
81e97e0d 439
6c94f330 440 if (TMath::Abs(GetSnp()+GetC()*dx) >= AliTPCReconstructor::GetMaxSnpTrack()) {
81e97e0d 441 return 0;
442 }
443
444 // Double_t y1=fP0, z1=fP1;
60e55aee 445 Double_t c1=GetSnp(), r1=sqrt((1.-c1)*(1.+c1));
446 Double_t c2=c1 + GetC()*dx, r2=sqrt((1.-c2)*(1.+c2));
81e97e0d 447
6c94f330 448 y = GetY();
449 z = GetZ();
81e97e0d 450 //y += dx*(c1+c2)/(r1+r2);
451 //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
452
453 Double_t dy = dx*(c1+c2)/(r1+r2);
454 Double_t dz = 0;
455 //
6c94f330 456 Double_t delta = GetC()*dx*(c1+c2)/(c1*r2 + c2*r1);
81e97e0d 457 /*
458 if (TMath::Abs(delta)>0.0001){
459 dz = fP3*TMath::ASin(delta)/fP4;
460 }else{
461 dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
462 }
463 */
464 // dz = fP3*AliTPCFastMath::FastAsin(delta)/fP4;
6c94f330 465 dz = GetTgl()*TMath::ASin(delta)/GetC();
81e97e0d 466 //
467 y+=dy;
468 z+=dz;
469
470
471 return 1;
472}
473
474
475//_____________________________________________________________________________
af32720d 476Double_t AliTPCseed::GetPredictedChi2(const AliCluster *c) const
81e97e0d 477{
478 //-----------------------------------------------------------------
479 // This function calculates a predicted chi2 increment.
480 //-----------------------------------------------------------------
6c94f330 481 Double_t p[2]={c->GetY(), c->GetZ()};
482 Double_t cov[3]={fErrorY2, 0., fErrorZ2};
483 return AliExternalTrackParam::GetPredictedChi2(p,cov);
81e97e0d 484}
485
81e97e0d 486//_________________________________________________________________________________________
487
488
489Int_t AliTPCseed::Compare(const TObject *o) const {
490 //-----------------------------------------------------------------
491 // This function compares tracks according to the sector - for given sector according z
492 //-----------------------------------------------------------------
493 AliTPCseed *t=(AliTPCseed*)o;
6c94f330 494
81e97e0d 495 if (fSort == 0){
496 if (t->fRelativeSector>fRelativeSector) return -1;
497 if (t->fRelativeSector<fRelativeSector) return 1;
498 Double_t z2 = t->GetZ();
499 Double_t z1 = GetZ();
500 if (z2>z1) return 1;
501 if (z2<z1) return -1;
502 return 0;
503 }
504 else {
505 Float_t f2 =1;
6c23ffed 506 f2 = 1-20*TMath::Sqrt(t->GetSigma1Pt2())/(t->OneOverPt()+0.0066);
81e97e0d 507 if (t->fBConstrain) f2=1.2;
508
509 Float_t f1 =1;
6c23ffed 510 f1 = 1-20*TMath::Sqrt(GetSigma1Pt2())/(OneOverPt()+0.0066);
81e97e0d 511
512 if (fBConstrain) f1=1.2;
513
514 if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
515 else return +1;
516 }
517}
518
519
520
521
522//_____________________________________________________________________________
70e20dcf 523Bool_t AliTPCseed::Update(const AliCluster *c, Double_t chisq, Int_t index)
6c94f330 524{
81e97e0d 525 //-----------------------------------------------------------------
526 // This function associates a cluster with this track.
527 //-----------------------------------------------------------------
81e97e0d 528 Int_t n=GetNumberOfClusters();
70e20dcf 529 Int_t idx=GetClusterIndex(n); // save the current cluster index
530
531 AliCluster cl(*c); cl.SetSigmaY2(fErrorY2); cl.SetSigmaZ2(fErrorZ2);
ca521f6c 532 Float_t dx = ((AliTPCclusterMI*)c)->GetX()-GetX();
533 if (TMath::Abs(dx)>0){
534 Float_t ty = TMath::Tan(TMath::ASin(GetSnp()));
535 Float_t dy = dx*ty;
536 Float_t dz = dx*TMath::Sqrt(1.+ty*ty)*GetTgl();
537 cl.SetY(c->GetY()-dy);
538 cl.SetZ(c->GetZ()-dz);
539 }
540
70e20dcf 541 if (!AliTPCtrack::Update(&cl,chisq,index)) return kFALSE;
e0e13b88 542
543 if (fCMeanSigmaY2p30<0){
544 fCMeanSigmaY2p30= c->GetSigmaY2(); //! current mean sigma Y2 - mean30%
c07cb486 545 fCMeanSigmaZ2p30= c->GetSigmaZ2(); //! current mean sigma Z2 - mean30%
546 fCMeanSigmaY2p30R = 1; //! current mean sigma Y2 - mean5%
547 fCMeanSigmaZ2p30R = 1; //! current mean sigma Z2 - mean5%
e0e13b88 548 }
549 //
550 fCMeanSigmaY2p30= 0.70*fCMeanSigmaY2p30 +0.30*c->GetSigmaY2();
c07cb486 551 fCMeanSigmaZ2p30= 0.70*fCMeanSigmaZ2p30 +0.30*c->GetSigmaZ2();
552 if (fCurrentSigmaY2>0){
553 fCMeanSigmaY2p30R = 0.7*fCMeanSigmaY2p30R +0.3*c->GetSigmaY2()/fCurrentSigmaY2;
554 fCMeanSigmaZ2p30R = 0.7*fCMeanSigmaZ2p30R +0.3*c->GetSigmaZ2()/fCurrentSigmaZ2;
555 }
e0e13b88 556
81e97e0d 557
70e20dcf 558 SetClusterIndex(n,idx); // restore the current cluster index
6c94f330 559 return kTRUE;
81e97e0d 560}
561
562
563
564//_____________________________________________________________________________
105b1b81 565Float_t AliTPCseed::CookdEdx(Double_t low, Double_t up,Int_t i1, Int_t i2, Bool_t onlyused) {
81e97e0d 566 //-----------------------------------------------------------------
567 // This funtion calculates dE/dX within the "low" and "up" cuts.
568 //-----------------------------------------------------------------
83afd539 569 AliTPCParam *param = AliTPCcalibDB::Instance()->GetParameters();
570 Int_t row0 = param->GetNRowLow();
571 Int_t row1 = row0+param->GetNRowUp1();
572 Int_t row2 = row1+param->GetNRowUp2();
573 //
574 //
575 //
576 fDEDX[0] = CookdEdxNorm(low,up,0 ,i1 ,i2, kTRUE,kFALSE,2,0);
577 fDEDX[1] = CookdEdxNorm(low,up,0 ,0 ,row0,kTRUE,kFALSE,2,0);
578 fDEDX[2] = CookdEdxNorm(low,up,0 ,row0,row1,kTRUE,kFALSE,2,0);
579 fDEDX[3] = CookdEdxNorm(low,up,0 ,row1,row2,kTRUE,kFALSE,2,0);
580 //
581 fSDEDX[0] = CookdEdxNorm(low,up,0 ,i1 ,i2, kTRUE,kFALSE,2,1);
582 fSDEDX[1] = CookdEdxNorm(low,up,0 ,0 ,row0,kTRUE,kFALSE,2,1);
583 fSDEDX[2] = CookdEdxNorm(low,up,0 ,row0,row1,kTRUE,kFALSE,2,1);
584 fSDEDX[3] = CookdEdxNorm(low,up,0 ,row1,row2,kTRUE,kFALSE,2,1);
585 //
586 fNCDEDX[0] = TMath::Nint(CookdEdxNorm(low,up,0 ,i1 ,i2, kTRUE,kFALSE,2,2));
587 fNCDEDX[1] = TMath::Nint(CookdEdxNorm(low,up,0 ,0 ,row0,kTRUE,kFALSE,2,2));
588 fNCDEDX[2] = TMath::Nint(CookdEdxNorm(low,up,0 ,row0,row1,kTRUE,kFALSE,2,2));
589 fNCDEDX[3] = TMath::Nint(CookdEdxNorm(low,up,0 ,row1,row2,kTRUE,kFALSE,2,2));
81e97e0d 590
83afd539 591 SetdEdx(fDEDX[0]);
592 return fDEDX[0];
81e97e0d 593
ba5e52fb 594// return CookdEdxNorm(low,up,0,i1,i2,1,0,2);
4cc7ba77 595
596
ba5e52fb 597// Float_t amp[200];
598// Float_t angular[200];
599// Float_t weight[200];
600// Int_t index[200];
601// //Int_t nc = 0;
602// Float_t meanlog = 100.;
603
604// Float_t mean[4] = {0,0,0,0};
605// Float_t sigma[4] = {1000,1000,1000,1000};
606// Int_t nc[4] = {0,0,0,0};
607// Float_t norm[4] = {1000,1000,1000,1000};
608// //
609// //
610// fNShared =0;
611
612// Float_t gainGG = 1;
613// if (AliTPCcalibDB::Instance()->GetParameters()){
614// gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000.; //relative gas gain
615// }
616
617
618// for (Int_t of =0; of<4; of++){
619// for (Int_t i=of+i1;i<i2;i+=4)
620// {
621// Int_t clindex = fIndex[i];
622// if (clindex<0||clindex&0x8000) continue;
623
624// //AliTPCTrackPoint * point = (AliTPCTrackPoint *) arr.At(i);
625// AliTPCTrackerPoint * point = GetTrackPoint(i);
626// //AliTPCTrackerPoint * pointm = GetTrackPoint(i-1);
627// //AliTPCTrackerPoint * pointp = 0;
628// //if (i<159) pointp = GetTrackPoint(i+1);
629
630// if (point==0) continue;
631// AliTPCclusterMI * cl = fClusterPointer[i];
632// if (cl==0) continue;
633// if (onlyused && (!cl->IsUsed(10))) continue;
634// if (cl->IsUsed(11)) {
635// fNShared++;
636// continue;
637// }
638// Int_t type = cl->GetType();
639// //if (point->fIsShared){
640// // fNShared++;
641// // continue;
642// //}
643// //if (pointm)
644// // if (pointm->fIsShared) continue;
645// //if (pointp)
646// // if (pointp->fIsShared) continue;
647
648// if (type<0) continue;
649// //if (type>10) continue;
650// //if (point->GetErrY()==0) continue;
651// //if (point->GetErrZ()==0) continue;
652
653// //Float_t ddy = (point->GetY()-cl->GetY())/point->GetErrY();
654// //Float_t ddz = (point->GetZ()-cl->GetZ())/point->GetErrZ();
655// //if ((ddy*ddy+ddz*ddz)>10) continue;
656
657
658// // if (point->GetCPoint().GetMax()<5) continue;
659// if (cl->GetMax()<5) continue;
660// Float_t angley = point->GetAngleY();
661// Float_t anglez = point->GetAngleZ();
662
663// Float_t rsigmay2 = point->GetSigmaY();
664// Float_t rsigmaz2 = point->GetSigmaZ();
665// /*
666// Float_t ns = 1.;
667// if (pointm){
668// rsigmay += pointm->GetTPoint().GetSigmaY();
669// rsigmaz += pointm->GetTPoint().GetSigmaZ();
670// ns+=1.;
671// }
672// if (pointp){
673// rsigmay += pointp->GetTPoint().GetSigmaY();
674// rsigmaz += pointp->GetTPoint().GetSigmaZ();
675// ns+=1.;
676// }
677// rsigmay/=ns;
678// rsigmaz/=ns;
679// */
680
681// Float_t rsigma = TMath::Sqrt(rsigmay2*rsigmaz2);
682
683// Float_t ampc = 0; // normalization to the number of electrons
684// if (i>64){
685// // ampc = 1.*point->GetCPoint().GetMax();
686// ampc = 1.*cl->GetMax();
687// //ampc = 1.*point->GetCPoint().GetQ();
688// // AliTPCClusterPoint & p = point->GetCPoint();
689// // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.6)) - TMath::Abs(p.GetY()/0.6)+0.5);
690// // Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
691// //Float_t dz =
692// // TMath::Abs( Int_t(iz) - iz + 0.5);
693// //ampc *= 1.15*(1-0.3*dy);
694// //ampc *= 1.15*(1-0.3*dz);
695// // Float_t zfactor = (AliTPCReconstructor::GetCtgRange()-0.0004*TMath::Abs(point->GetCPoint().GetZ()));
696// //ampc *=zfactor;
697// }
698// else{
699// //ampc = 1.0*point->GetCPoint().GetMax();
700// ampc = 1.0*cl->GetMax();
701// //ampc = 1.0*point->GetCPoint().GetQ();
702// //AliTPCClusterPoint & p = point->GetCPoint();
703// // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.4)) - TMath::Abs(p.GetY()/0.4)+0.5);
704// //Float_t iz = (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
705// //Float_t dz =
706// // TMath::Abs( Int_t(iz) - iz + 0.5);
707
708// //ampc *= 1.15*(1-0.3*dy);
709// //ampc *= 1.15*(1-0.3*dz);
710// // Float_t zfactor = (1.02-0.000*TMath::Abs(point->GetCPoint().GetZ()));
711// //ampc *=zfactor;
712
713// }
714// ampc *= 2.0; // put mean value to channel 50
715// //ampc *= 0.58; // put mean value to channel 50
716// Float_t w = 1.;
717// // if (type>0) w = 1./(type/2.-0.5);
718// // Float_t z = TMath::Abs(cl->GetZ());
719// if (i<64) {
720// ampc /= 0.6;
721// //ampc /= (1+0.0008*z);
722// } else
723// if (i>128){
724// ampc /=1.5;
725// //ampc /= (1+0.0008*z);
726// }else{
727// //ampc /= (1+0.0008*z);
728// }
81e97e0d 729
ba5e52fb 730// if (type<0) { //amp at the border - lower weight
731// // w*= 2.;
81e97e0d 732
ba5e52fb 733// continue;
734// }
735// if (rsigma>1.5) ampc/=1.3; // if big backround
736// amp[nc[of]] = ampc;
737// amp[nc[of]] /=gainGG;
738// angular[nc[of]] = TMath::Sqrt(1.+angley*angley+anglez*anglez);
739// weight[nc[of]] = w;
740// nc[of]++;
741// }
81e97e0d 742
ba5e52fb 743// TMath::Sort(nc[of],amp,index,kFALSE);
744// Float_t sumamp=0;
745// Float_t sumamp2=0;
746// Float_t sumw=0;
747// //meanlog = amp[index[Int_t(nc[of]*0.33)]];
748// meanlog = 50;
749// for (Int_t i=int(nc[of]*low+0.5);i<int(nc[of]*up+0.5);i++){
750// Float_t ampl = amp[index[i]]/angular[index[i]];
751// ampl = meanlog*TMath::Log(1.+ampl/meanlog);
752// //
753// sumw += weight[index[i]];
754// sumamp += weight[index[i]]*ampl;
755// sumamp2 += weight[index[i]]*ampl*ampl;
756// norm[of] += angular[index[i]]*weight[index[i]];
757// }
758// if (sumw<1){
759// SetdEdx(0);
760// }
761// else {
762// norm[of] /= sumw;
763// mean[of] = sumamp/sumw;
764// sigma[of] = sumamp2/sumw-mean[of]*mean[of];
765// if (sigma[of]>0.1)
766// sigma[of] = TMath::Sqrt(sigma[of]);
767// else
768// sigma[of] = 1000;
81e97e0d 769
ba5e52fb 770// mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
771// //mean *=(1-0.02*(sigma/(mean*0.17)-1.));
772// //mean *=(1-0.1*(norm-1.));
773// }
774// }
775
776// Float_t dedx =0;
777// fSdEdx =0;
778// fMAngular =0;
779// // mean[0]*= (1-0.05*(sigma[0]/(0.01+mean[1]*0.18)-1));
780// // mean[1]*= (1-0.05*(sigma[1]/(0.01+mean[0]*0.18)-1));
81e97e0d 781
782
ba5e52fb 783// // dedx = (mean[0]* TMath::Sqrt((1.+nc[0]))+ mean[1]* TMath::Sqrt((1.+nc[1])) )/
784// // ( TMath::Sqrt((1.+nc[0]))+TMath::Sqrt((1.+nc[1])));
785
786// Int_t norm2 = 0;
787// Int_t norm3 = 0;
788// for (Int_t i =0;i<4;i++){
789// if (nc[i]>2&&nc[i]<1000){
790// dedx += mean[i] *nc[i];
791// fSdEdx += sigma[i]*(nc[i]-2);
792// fMAngular += norm[i] *nc[i];
793// norm2 += nc[i];
794// norm3 += nc[i]-2;
795// }
796// fDEDX[i] = mean[i];
797// fSDEDX[i] = sigma[i];
798// fNCDEDX[i]= nc[i];
799// }
800
801// if (norm3>0){
802// dedx /=norm2;
803// fSdEdx /=norm3;
804// fMAngular/=norm2;
805// }
806// else{
807// SetdEdx(0);
808// return 0;
809// }
810// // Float_t dedx1 =dedx;
811// /*
812// dedx =0;
813// for (Int_t i =0;i<4;i++){
814// if (nc[i]>2&&nc[i]<1000){
815// mean[i] = mean[i]*(1-0.12*(sigma[i]/(fSdEdx)-1.));
816// dedx += mean[i] *nc[i];
817// }
818// fDEDX[i] = mean[i];
819// }
820// dedx /= norm2;
821// */
81e97e0d 822
823
ba5e52fb 824// SetdEdx(dedx);
825// return dedx;
81e97e0d 826}
827Double_t AliTPCseed::Bethe(Double_t bg){
828 //
829 // This is the Bethe-Bloch function normalised to 1 at the minimum
830 //
831 Double_t bg2=bg*bg;
832 Double_t bethe;
833 if (bg<3.5e1)
834 bethe=(1.+ bg2)/bg2*(log(5940*bg2) - bg2/(1.+ bg2));
835 else // Density effect ( approximately :)
836 bethe=1.15*(1.+ bg2)/bg2*(log(3.5*5940*bg) - bg2/(1.+ bg2));
837 return bethe/11.091;
838}
839
840void AliTPCseed::CookPID()
841{
842 //
843 // cook PID information according dEdx
844 //
845 Double_t fRange = 10.;
846 Double_t fRes = 0.1;
847 Double_t fMIP = 47.;
848 //
849 Int_t ns=AliPID::kSPECIES;
850 Double_t sumr =0;
851 for (Int_t j=0; j<ns; j++) {
852 Double_t mass=AliPID::ParticleMass(j);
6c94f330 853 Double_t mom=GetP();
81e97e0d 854 Double_t dedx=fdEdx/fMIP;
855 Double_t bethe=Bethe(mom/mass);
856 Double_t sigma=fRes*bethe;
857 if (sigma>0.001){
858 if (TMath::Abs(dedx-bethe) > fRange*sigma) {
859 fTPCr[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
860 sumr+=fTPCr[j];
861 continue;
862 }
863 fTPCr[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
864 sumr+=fTPCr[j];
865 }
866 else{
867 fTPCr[j]=1.;
868 sumr+=fTPCr[j];
869 }
870 }
871 for (Int_t j=0; j<ns; j++) {
872 fTPCr[j]/=sumr; //normalize
873 }
874}
875
6c94f330 876Double_t AliTPCseed::GetYat(Double_t xk) const {
877//-----------------------------------------------------------------
878// This function calculates the Y-coordinate of a track at the plane x=xk.
879//-----------------------------------------------------------------
880 if (TMath::Abs(GetSnp())>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
60e55aee 881 Double_t c1=GetSnp(), r1=TMath::Sqrt((1.-c1)*(1.+c1));
6c94f330 882 Double_t c2=c1+GetC()*(xk-GetX());
883 if (TMath::Abs(c2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0;
60e55aee 884 Double_t r2=TMath::Sqrt((1.-c2)*(1.+c2));
6c94f330 885 return GetY() + (xk-GetX())*(c1+c2)/(r1+r2);
886}
887
19b00333 888void AliTPCseed::SetClusterMapBit(int ibit, Bool_t state)
889{
890 fClusterMap[ibit] = state;
891}
892Bool_t AliTPCseed::GetClusterMapBit(int ibit)
893{
894 return fClusterMap[ibit];
895}
896void AliTPCseed::SetSharedMapBit(int ibit, Bool_t state)
897{
898 fSharedMap[ibit] = state;
899}
900Bool_t AliTPCseed::GetSharedMapBit(int ibit)
901{
902 return fSharedMap[ibit];
903}
eb02f63a 904
905
0a65832b 906
907
908
83afd539 909Float_t AliTPCseed::CookdEdxNorm(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Bool_t shapeNorm,Bool_t posNorm, Int_t padNorm, Int_t returnVal){
0a65832b 910
911 //
912 // calculates dedx using the cluster
913 // low - up specify trunc mean range - default form 0-0.7
8076baa0 914 // type - 1 - max charge or 0- total charge in cluster
915 // //2- max no corr 3- total+ correction
0a65832b 916 // i1-i2 - the pad-row range used for calculation
ba5e52fb 917 // shapeNorm - kTRUE -taken from OCDB
918 //
919 // posNorm - usage of pos normalization
83afd539 920 // padNorm - pad type normalization
921 // returnVal - 0 return mean
922 // - 1 return RMS
923 // - 2 return number of clusters
924 //
0a65832b 925 // normalization parametrization taken from AliTPCClusterParam
926 //
ba5e52fb 927 AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
928 AliTPCParam * param = AliTPCcalibDB::Instance()->GetParameters();
929 if (!parcl) return 0;
930 if (!param) return 0;
83afd539 931 Int_t row0 = param->GetNRowLow();
932 Int_t row1 = row0+param->GetNRowUp1();
933
0a65832b 934 Float_t amp[160];
935 Int_t indexes[160];
936 Int_t ncl=0;
937 //
938 //
ba5e52fb 939 Float_t gainGG = 1; // gas gain factor -always enabled
940 Float_t gainPad = 1; // gain map - used always
83afd539 941 Float_t corrShape = 1; // correction due angular effect, diffusion and electron attachment
ba5e52fb 942 Float_t corrPos = 1; // local position correction - if posNorm enabled
943 Float_t corrPadType = 1; // pad type correction - if padNorm enabled
944 Float_t corrNorm = 1; // normalization factor - set Q to channel 50
945 //
946 //
947 //
4cc7ba77 948 if (AliTPCcalibDB::Instance()->GetParameters()){
ba5e52fb 949 gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000; //relative gas gain
4cc7ba77 950 }
951
0a65832b 952 const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
4cc7ba77 953 const Float_t kedgey =3.;
0a65832b 954 //
7cd8ac3f 955 //
0a65832b 956 for (Int_t irow=i1; irow<i2; irow++){
957 AliTPCclusterMI* cluster = GetClusterPointer(irow);
958 if (!cluster) continue;
959 if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
8076baa0 960 Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
ba5e52fb 961 Int_t ipad= 0;
83afd539 962 if (irow>=row0) ipad=1;
963 if (irow>=row1) ipad=2;
ba5e52fb 964 //
965 //
966 //
967 AliTPCCalPad * gainMap = AliTPCcalibDB::Instance()->GetDedxGainFactor();
968 if (gainMap) {
969 //
970 // Get gainPad - pad by pad calibration
971 //
d6920632 972 Float_t factor = 1;
973 AliTPCCalROC * roc = gainMap->GetCalROC(cluster->GetDetector());
83afd539 974 if (irow < row0) { // IROC
ba5e52fb 975 factor = roc->GetValue(irow, TMath::Nint(cluster->GetPad()));
d6920632 976 } else { // OROC
83afd539 977 factor = roc->GetValue(irow - row0, TMath::Nint(cluster->GetPad()));
d6920632 978 }
ba5e52fb 979 if (factor>0.5) gainPad=factor;
7cd8ac3f 980 }
ba5e52fb 981 //
982 //do position and angular normalization
983 //
984 if (shapeNorm){
985 if (type<=1){
986 //
987 AliTPCTrackerPoint * point = GetTrackPoint(irow);
988 Float_t ty = TMath::Abs(point->GetAngleY());
83afd539 989 Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
ba5e52fb 990
991 Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
992 corrShape = parcl->Qnorm(ipad,type,dr,ty,tz);
993 }
0a65832b 994 }
ba5e52fb 995
8e1dcdda 996 if (posNorm){
997 //
ba5e52fb 998 // Do position normalization - relative distance to
999 // center of pad- time bin
1000 // Work in progress
1001 corrPos = parcl->QnormPos(ipad,type, cluster->GetPad(),
1002 cluster->GetTimeBin(), cluster->GetZ(),
1003 cluster->GetSigmaY2(),cluster->GetSigmaZ2(),
1004 cluster->GetMax(),cluster->GetQ());
8e1dcdda 1005 }
1006
ba5e52fb 1007 if (padNorm==1){
1008 //taken from OCDB
1009 if (type==0 && parcl->fQpadTnorm) corrPadType = (*parcl->fQpadTnorm)[ipad];
1010 if (type==1 && parcl->fQpadTnorm) corrPadType = (*parcl->fQpadMnorm)[ipad];
2fc9608f 1011 }
ba5e52fb 1012 if (padNorm==2){
1013 corrPadType =param->GetPadPitchLength(cluster->GetDetector(),cluster->GetRow());
1014 //use hardwired - temp fix
1015 if (type==0) corrNorm=3.;
1016 if (type==1) corrNorm=1.;
1017 }
1018 //
1019 amp[ncl]=charge;
1020 amp[ncl]/=gainGG;
1021 amp[ncl]/=gainPad;
1022 amp[ncl]/=corrShape;
1023 amp[ncl]/=corrPadType;
1024 amp[ncl]/=corrPos;
1025 amp[ncl]/=corrNorm;
1026 //
0a65832b 1027 ncl++;
1028 }
8076baa0 1029
0a65832b 1030 if (type>3) return ncl;
1031 TMath::Sort(ncl,amp, indexes, kFALSE);
1032
8076baa0 1033 if (ncl<10) return 0;
0a65832b 1034
1035 Float_t suma=0;
83afd539 1036 Float_t suma2=0;
0a65832b 1037 Float_t sumn=0;
1038 Int_t icl0=TMath::Nint(ncl*low);
1039 Int_t icl1=TMath::Nint(ncl*up);
1040 for (Int_t icl=icl0; icl<icl1;icl++){
1041 suma+=amp[indexes[icl]];
83afd539 1042 suma2+=amp[indexes[icl]]*amp[indexes[icl]];
0a65832b 1043 sumn++;
1044 }
83afd539 1045 Float_t mean =suma/sumn;
1046 Float_t rms =TMath::Sqrt(TMath::Abs(suma2/sumn-mean*mean));
1047 if (returnVal==1) return rms;
1048 if (returnVal==2) return ncl;
1049 return mean;
0a65832b 1050}
1051
83afd539 1052
0a65832b 1053Double_t AliTPCseed::BetheMass(Double_t mass){
1054 //
1055 // return bethe-bloch
1056 //
1057 Float_t bg= P()/mass;
1058 const Double_t kp1=0.76176e-1;
1059 const Double_t kp2=10.632;
1060 const Double_t kp3=0.13279e-4;
1061 const Double_t kp4=1.8631;
1062 const Double_t kp5=1.9479;
1063
1064 Double_t dbg = (Double_t) bg;
1065
1066 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1067
1068 Double_t aa = TMath::Power(beta,kp4);
1069 Double_t bb = TMath::Power(1./dbg,kp5);
1070
1071 bb=TMath::Log(kp3+bb);
1072
1073 return ((Float_t)((kp2-aa-bb)*kp1/aa));
1074}
1075
1076
eb02f63a 1077Float_t AliTPCseed::CookShape(Int_t type){
1078 //
1079 //
1080 //
1081 //-----------------------------------------------------------------
1082 // This funtion calculates dE/dX within the "low" and "up" cuts.
1083 //-----------------------------------------------------------------
1084 Float_t means=0;
1085 Float_t meanc=0;
1086 for (Int_t i =0; i<160;i++) {
1087 AliTPCTrackerPoint * point = GetTrackPoint(i);
1088 if (point==0) continue;
1089
1090 AliTPCclusterMI * cl = fClusterPointer[i];
1091 if (cl==0) continue;
1092
1093 Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
1094 Float_t rsigmaz = TMath::Sqrt(point->GetSigmaZ());
1095 Float_t rsigma = (rsigmay+rsigmaz)*0.5;
1096 if (type==0) means+=rsigma;
1097 if (type==1) means+=rsigmay;
1098 if (type==2) means+=rsigmaz;
1099 meanc++;
1100 }
1101 Float_t mean = (meanc>0)? means/meanc:0;
1102 return mean;
1103}
87e92a27 1104
1105
1106
1107Int_t AliTPCseed::RefitTrack(AliTPCseed *seed, AliExternalTrackParam * parin, AliExternalTrackParam * parout){
1108 //
1109 // Refit the track
1110 // return value - number of used clusters
1111 //
1112 //
1113 const Int_t kMinNcl =10;
1114 AliTPCseed *track=new AliTPCseed(*seed);
1115 Int_t sector=-1;
1116 // reset covariance
1117 //
1118 Double_t covar[15];
1119 for (Int_t i=0;i<15;i++) covar[i]=0;
1120 covar[0]=10.*10.;
1121 covar[2]=10.*10.;
1122 covar[5]=10.*10./(64.*64.);
1123 covar[9]=10.*10./(64.*64.);
1124 covar[14]=1*1;
1125 //
1126
1127 Float_t xmin=1000, xmax=-10000;
1128 Int_t imin=158, imax=0;
1129 for (Int_t i=0;i<160;i++) {
1130 AliTPCclusterMI *c=track->GetClusterPointer(i);
1131 if (!c) continue;
1132 if (sector<0) sector = c->GetDetector();
1133 if (c->GetX()<xmin) xmin=c->GetX();
1134 if (c->GetX()>xmax) xmax=c->GetX();
1135 if (i<imin) imin=i;
1136 if (i>imax) imax=i;
1137 }
1138 if(imax-imin<kMinNcl) {
1139 delete track;
1140 return 0 ;
1141 }
1142 // Not succes to rotate
1143 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1144 delete track;
1145 return 0;
1146 }
1147 //
1148 //
1149 // fit from inner to outer row
1150 //
1151 AliExternalTrackParam paramIn;
1152 AliExternalTrackParam paramOut;
1153 Bool_t isOK=kTRUE;
be34cb88 1154 Int_t ncl=0;
87e92a27 1155 //
1156 //
1157 //
1158 for (Int_t i=imin; i<=imax; i++){
1159 AliTPCclusterMI *c=track->GetClusterPointer(i);
1160 if (!c) continue;
1161 // if (RejectCluster(c,track)) continue;
be34cb88 1162 sector = (c->GetDetector()%18);
1163 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1164 //continue;
1165 }
87e92a27 1166 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1167 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1168 if (!track->PropagateTo(r[0])) {
1169 isOK=kFALSE;
87e92a27 1170 }
1171 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1172 }
1173 if (!isOK) { delete track; return 0;}
1174 track->AddCovariance(covar);
1175 //
1176 //
1177 //
1178 for (Int_t i=imax; i>=imin; i--){
1179 AliTPCclusterMI *c=track->GetClusterPointer(i);
1180 if (!c) continue;
1181 //if (RejectCluster(c,track)) continue;
be34cb88 1182 sector = (c->GetDetector()%18);
1183 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1184 //continue;
1185 }
87e92a27 1186 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1187 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1188 if (!track->PropagateTo(r[0])) {
1189 isOK=kFALSE;
87e92a27 1190 }
1191 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1192 }
be34cb88 1193 //if (!isOK) { delete track; return 0;}
87e92a27 1194 paramIn = *track;
1195 track->AddCovariance(covar);
1196 //
1197 //
1198 for (Int_t i=imin; i<=imax; i++){
1199 AliTPCclusterMI *c=track->GetClusterPointer(i);
1200 if (!c) continue;
be34cb88 1201 sector = (c->GetDetector()%18);
1202 if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
1203 //continue;
1204 }
1205 ncl++;
87e92a27 1206 //if (RejectCluster(c,track)) continue;
1207 Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
1208 Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
1209 if (!track->PropagateTo(r[0])) {
1210 isOK=kFALSE;
87e92a27 1211 }
1212 if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
1213 }
be34cb88 1214 //if (!isOK) { delete track; return 0;}
87e92a27 1215 paramOut=*track;
87e92a27 1216 //
1217 //
1218 //
1219 if (parin) (*parin)=paramIn;
1220 if (parout) (*parout)=paramOut;
be34cb88 1221 return ncl;
87e92a27 1222}
1223
1224
1225
1226Bool_t AliTPCseed::RefitTrack(AliTPCseed* /*seed*/, Bool_t /*out*/){
1227 //
1228 //
1229 //
1230 return kFALSE;
1231}
3247d397 1232
1233
1234
1235
1236
1237
1238void AliTPCseed::GetError(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
1239 Double_t& erry, Double_t &errz)
1240{
1241 //
1242 // Get cluster error at given position
1243 //
1244 AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
1245 Double_t tany,tanz;
1246 Double_t snp1=param->GetSnp();
60e55aee 1247 tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1248 //
1249 Double_t tgl1=param->GetTgl();
60e55aee 1250 tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1251 //
1252 Int_t padSize = 0; // short pads
1253 if (cluster->GetDetector() >= 36) {
1254 padSize = 1; // medium pads
1255 if (cluster->GetRow() > 63) padSize = 2; // long pads
1256 }
1257
1258 erry = clusterParam->GetError0Par( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany) );
1259 errz = clusterParam->GetError0Par( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) );
1260}
1261
1262
1263void AliTPCseed::GetShape(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
1264 Double_t& rmsy, Double_t &rmsz)
1265{
1266 //
1267 // Get cluster error at given position
1268 //
1269 AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
1270 Double_t tany,tanz;
1271 Double_t snp1=param->GetSnp();
60e55aee 1272 tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1273 //
1274 Double_t tgl1=param->GetTgl();
60e55aee 1275 tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
3247d397 1276 //
1277 Int_t padSize = 0; // short pads
1278 if (cluster->GetDetector() >= 36) {
1279 padSize = 1; // medium pads
1280 if (cluster->GetRow() > 63) padSize = 2; // long pads
1281 }
1282
1283 rmsy = clusterParam->GetRMSQ( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany), TMath::Abs(cluster->GetMax()) );
1284 rmsz = clusterParam->GetRMSQ( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) ,TMath::Abs(cluster->GetMax()));
1285}
ba5e52fb 1286
1287
1288
1289Double_t AliTPCseed::GetQCorrGeom(Float_t ty, Float_t tz){
1290 //Geoetrical
1291 //ty - tangent in local y direction
1292 //tz - tangent
1293 //
1294 Float_t norm=TMath::Sqrt(1+ty*ty+tz*tz);
1295 return norm;
1296}
1297
83afd539 1298Double_t AliTPCseed::GetQCorrShape(Int_t ipad, Int_t type,Float_t z, Float_t ty, Float_t tz, Float_t /*q*/, Float_t /*thr*/){
ba5e52fb 1299 //
1300 // Q normalization
1301 //
1302 // return value = Q Normalization factor
1303 // Normalization - 1 - shape factor part for full drift
1304 // 1 - electron attachment for 0 drift
1305
1306 // Input parameters:
1307 //
1308 // ipad - 0 short pad
1309 // 1 medium pad
1310 // 2 long pad
1311 //
1312 // type - 0 qmax
1313 // - 1 qtot
1314 //
1315 //z - z position (-250,250 cm)
1316 //ty - tangent in local y direction
1317 //tz - tangent
1318 //
1319
1320 AliTPCClusterParam * paramCl = AliTPCcalibDB::Instance()->GetClusterParam();
1321 AliTPCParam * paramTPC = AliTPCcalibDB::Instance()->GetParameters();
1322
1323 if (!paramCl) return 1;
1324 //
1325 Double_t dr = 250.-TMath::Abs(z);
1326 Double_t sy = paramCl->GetRMS0( 0,ipad, dr, TMath::Abs(ty));
1327 Double_t sy0= paramCl->GetRMS0(0,ipad, 250, 0);
1328 Double_t sz = paramCl->GetRMS0( 1,ipad, dr, TMath::Abs(tz));
1329 Double_t sz0= paramCl->GetRMS0(1,ipad, 250, 0);
1330
1331 Double_t sfactorMax = TMath::Sqrt(sy0*sz0/(sy*sz));
1332
1333
1334 Double_t dt = 1000000*(dr/paramTPC->GetDriftV()); //time in microsecond
1335 Double_t attProb = TMath::Exp(-paramTPC->GetAttCoef()*paramTPC->GetOxyCont()*dt);
1336 //
1337 //
1338 if (type==0) return sfactorMax*attProb;
1339
1340 return attProb;
1341
1342
1343}
1344