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f641f6bd 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
88cb7938 16/* $Id$ */
19364939 17
f641f6bd 18///////////////////////////////////////////////////////////////////////////////
19// //
20// Time Projection Chamber track hits object //
21//
22// Origin: Marian Ivanov , GSI Darmstadt
23//
24// AliTPCTrackHitsV2
25// Container for Track Hits - based on standard TClonesArray -
26// fArray of AliTPCTrackHitsParamV2
27// In AliTPCTrackHitsParamV2 - parameterization of the track segment is stored
28// for each of the track segment - relative position ( distance between hits) and
29// charge of the hits is stored - comparing to classical TClonesArray of AliTPChit -
30// comperssion factor of 5-7 (depending on the required precision) -
31// In future release AliTPCTrackHitsV2 - will replace old AliTPCTrackHits - which were not
32// based on standard ROOT containers
33// Basic function:
34// // during building Container
35// AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x, Double_t y, Double_t z,Int_t q)
36// void SetHitPrecision(Double_t prec) {fPrecision=prec;}
37// void SetStepPrecision(Double_t prec) {fStep=prec;}
38// Bool_t FlushHitStack(Bool_t force=kTRUE);
39// //at the end necessary to have Container in consistent state
40//
41// // looping over Container
42// Bool_t First(), Bool_t Next() - iterators - return status of the operation
43// AliTPChit * GetHit(); - return current hit
44
45
46//Begin_Html
47/*
48<img src="gif/AliTPCTrackHitsV2.gif">
49*/
50//End_Html
51// //
52// //
53///////////////////////////////////////////////////////////////////////////////
018a927a 54//
f641f6bd 55
3010c308 56#include <TClonesArray.h>
57#include <TMath.h>
58
f641f6bd 59#include "AliTPCTrackHitsV2.h"
f641f6bd 60#include "AliTPC.h"
61
f641f6bd 62
63
64ClassImp(AliTPCTrackHitsV2)
65ClassImp(AliTrackHitsParamV2)
66
67 //
68Int_t AliTrackHitsParamV2::fgCounter1 =0;
69Int_t AliTrackHitsParamV2::fgCounter2 =0;
70//
71Int_t AliTPCTrackHitsV2::fgCounter1 =0;
72Int_t AliTPCTrackHitsV2::fgCounter2 =0;
73//
74const Double_t AliTPCTrackHitsV2::fgkPrecision=1e-6; //precision
75const Double_t AliTPCTrackHitsV2::fgkPrecision2=1e-20; //precision
e61fd20d 76const Double_t AliTPCTrackHitsV2::fgkTimePrecision=20.e-9; //hit time precision
f641f6bd 77
78
79
80
b9671574 81class AliTPCTempHitInfoV2 {
82public:
f641f6bd 83 AliTPCTempHitInfoV2();
e61fd20d 84 void SetHit(Double_t r, Double_t z, Double_t fi, Int_t q, Float_t time);
b9671574 85 UInt_t GetStackIndex() const {return fStackIndex;}
86 void SetStackIndex(UInt_t i) {fStackIndex=i;}
87 UInt_t GetParamIndex() const {return fParamIndex;}
88 void SetParamIndex(UInt_t i) {fParamIndex=i;}
89 Float_t GetTimeStack(Int_t i) const {return fTimeStack[i];}
90 const Float_t* GetTimeStackP(Int_t i) const {return &fTimeStack[i];}
91 UInt_t GetQStack(Int_t i) const {return fQStack[i];}
92 const UInt_t* GetQStackP(Int_t i) const {return &fQStack[i];}
f641f6bd 93 Double_t * GetPosition(Int_t index){return &fPositionStack[index*3];}
b9671574 94 Double_t GetOldR() const {return fOldR;}
95 void SetOldR(Double_t r) {fOldR=r;}
96
97
98 AliTrackHitsParamV2 * GetParam() const {return fParam;}
99 void SetParam(AliTrackHitsParamV2 * p) {fParam=p;}
100 void UpdateParam(Double_t maxdelta); //recal
101 void NewParam(Double_t r, Double_t z, Double_t fi, Int_t q, Float_t time);
102 enum {kStackSize = 10000};
103
104protected:
105 AliTPCTempHitInfoV2(const AliTPCTempHitInfoV2 &hit);
106 AliTPCTempHitInfoV2& operator = (const AliTPCTempHitInfoV2 &hit);
f641f6bd 107 void Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
108 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
109 Double_t fSumX4, Int_t n,
110 Double_t &a, Double_t &b, Double_t &c);
111 void Fit(AliTrackHitsParamV2 * param);
53110b9d 112 Double_t fSumDr; // Sum of Dr
113 Double_t fSumDr2; // Square of sum of Dr
114 Double_t fSumDr3; // Cube of sum of Dr
115 Double_t fSumDr4; // Fourth power of sum of Dr
116 Double_t fSumDFi; // Sum of DFi
117 Double_t fSumDFiDr; // Sum of DFiDr
118 Double_t fSumDFiDr2;// Sum of square of DFiDr
119 Double_t fSumDZ; // Sum of DZ
120 Double_t fSumDZDr; // Sum of DZDr
121 Double_t fSumDZDr2; // Sum of square of DZDr
f641f6bd 122 Double_t fOldR; //previos r
53110b9d 123 Double_t fPositionStack[3*kStackSize]; //position stack
124 UInt_t fQStack[kStackSize]; //Q stack
e61fd20d 125 Float_t fTimeStack[kStackSize]; //time stack
f641f6bd 126 UInt_t fStackIndex; //current stack index
127 // UInt_t fInfoIndex; //current track info index
128 UInt_t fParamIndex; //current track parameters index
129 // AliTrackHitsInfo * fInfo; //current track info
130 AliTrackHitsParamV2 * fParam; //current track param
131};
132
133
134AliTPCTempHitInfoV2::AliTPCTempHitInfoV2()
179c6296 135 :fSumDr(0.),
136 fSumDr2(0.),
137 fSumDr3(0.),
138 fSumDr4(0.),
139 fSumDFi(0.),
140 fSumDFiDr(0.),
141 fSumDFiDr2(0.),
142 fSumDZ(0.),
143 fSumDZDr(0.),
144 fSumDZDr2(0.),
145 fOldR(0.),
146 fStackIndex(0),
147 fParamIndex(0),
148 fParam(0)
f641f6bd 149{
150 //
53110b9d 151 // Standard constructor
152 // set to default value
153 //
f641f6bd 154 fSumDr=fSumDr2=fSumDr3=fSumDr4=
155 fSumDFi=fSumDFiDr=fSumDFiDr2=
156 fSumDZ=fSumDZDr=fSumDZDr2=0;
157 fStackIndex = 0;
158 // fInfoIndex = 0;
159 fParamIndex = 0;
160}
161
162
e61fd20d 163void AliTPCTempHitInfoV2::NewParam(Double_t r, Double_t z, Double_t fi, Int_t q, Float_t time)
f641f6bd 164{
165 //
166 //reset stack and sum parameters
167 //store line initial point
53110b9d 168 //
f641f6bd 169 fSumDr=fSumDr2=fSumDr3=fSumDr4=
170 fSumDFi=fSumDFiDr=fSumDFiDr2=
171 fSumDZ=fSumDZDr=fSumDZDr2=0;
172 fStackIndex=0;
b9671574 173 fParam->SetR(r);
f641f6bd 174 fOldR = r;
b9671574 175 fParam->SetZ(z);
176 fParam->SetFi(fi);
177 fParam->SetAn(0.);
178 fParam->SetAd(0.);
179 fParam->SetTheta(0.);
180 fParam->SetThetaD(0.);
e61fd20d 181 SetHit(r,z,fi,q,time);
f641f6bd 182}
183
e61fd20d 184void AliTPCTempHitInfoV2::SetHit(Double_t r, Double_t z, Double_t fi, Int_t q, Float_t time)
f641f6bd 185{
186 //
187 //add hit to the stack
188 //recalculate new estimete of line parameters
189 Double_t *f = GetPosition(fStackIndex);
190 f[0] = r;
191 f[1] = z;
192 f[2] = fi;
193 fQStack[fStackIndex]=q;
e61fd20d 194 fTimeStack[fStackIndex]=time;
f641f6bd 195 if (fStackIndex==0) return;
b9671574 196 Double_t dr = (r-fParam->GetR());
197 if (TMath::Abs(dr)<AliTPCTrackHitsV2::GetKPrecision()) dr =AliTPCTrackHitsV2::GetKPrecision();
198 Double_t dfi = fi-fParam->GetFi();
199 Double_t dz = z -fParam->GetZ();
f641f6bd 200 Double_t dr2 =dr*dr;
201 Double_t dr3 =dr2*dr;
202 Double_t dr4 =dr3*dr;
203 fSumDr +=dr;
204 fSumDr2+=dr2;
205 fSumDr3+=dr3;
206 fSumDr4+=dr4;
207 fSumDFi +=dfi;
208 fSumDFiDr+=dfi*dr;
209 fSumDFiDr2+=dfi*dr2;
210 fSumDZ +=dz;
211 fSumDZDr+=dz*dr;
212 fSumDZDr2+=dz*dr2;
213
214 //update fit parameters
215 //
216 Double_t det = fSumDr2*fSumDr4-fSumDr3*fSumDr3;
b9671574 217 if (TMath::Abs(det)<AliTPCTrackHitsV2::GetKPrecision2()) return;
f641f6bd 218 if ( ( fStackIndex>1 ) ){
b9671574 219 fParam->SetAn((fSumDr4*fSumDFiDr-fSumDr3*fSumDFiDr2)/det);
220 fParam->SetAd((fSumDr2*fSumDFiDr2-fSumDr3*fSumDFiDr)/det);
f641f6bd 221 }
222 else
b9671574 223 fParam->SetAn(fSumDFiDr/fSumDr2);
f641f6bd 224 if ( ( fStackIndex>1 ) ){
b9671574 225 fParam->SetTheta((fSumDr4*fSumDZDr-fSumDr3*fSumDZDr2)/det);
226 fParam->SetThetaD((fSumDr2*fSumDZDr2-fSumDr3*fSumDZDr)/det);
f641f6bd 227 }
228 else
b9671574 229 fParam->SetTheta(fSumDZDr/fSumDr2);
f641f6bd 230}
231
232
233void AliTPCTempHitInfoV2::UpdateParam(Double_t maxdelta)
234{
53110b9d 235 //
236 // recalc parameters not fixing origin point
237 //
f641f6bd 238 if (fStackIndex>5){
239 Double_t a,b,c;
240 a=b=c=0;
241 Fit2(fSumDFi, fSumDFiDr, fSumDFiDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
242 fStackIndex, a,b,c);
243 if (TMath::Abs(a)<maxdelta){
b9671574 244 fParam->SetFi(fParam->GetFi()+a/fParam->GetR());
245 fParam->SetAn(b);
246 fParam->SetAd(c);
f641f6bd 247 }
248 Fit2(fSumDZ, fSumDZDr, fSumDZDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
249 fStackIndex, a,b,c) ;
250 if (TMath::Abs(a)<maxdelta){
b9671574 251 fParam->SetZ(fParam->GetZ()+a);
252 fParam->SetTheta(b);
253 fParam->SetThetaD(c);
f641f6bd 254 }
255 }
256
257}
53110b9d 258
f641f6bd 259void AliTPCTempHitInfoV2::Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
260 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
261 Double_t fSumX4, Int_t n,
262 Double_t &a, Double_t &b, Double_t &c)
263{
53110b9d 264 //
265 // fit of second order
266 //
f641f6bd 267 Double_t det =
268 n* (fSumX2*fSumX4-fSumX3*fSumX3) -
269 fSumX* (fSumX*fSumX4-fSumX3*fSumX2)+
270 fSumX2* (fSumX*fSumX3-fSumX2*fSumX2);
271
b9671574 272 if (TMath::Abs(det)> AliTPCTrackHitsV2::GetKPrecision()) {
f641f6bd 273 a =
274 (fSumY * (fSumX2*fSumX4-fSumX3*fSumX3)-
275 fSumX *(fSumYX*fSumX4-fSumYX2*fSumX3)+
276 fSumX2*(fSumYX*fSumX3-fSumYX2*fSumX2))/det;
277 b=
278 (n*(fSumYX*fSumX4-fSumX3*fSumYX2)-
279 fSumY*(fSumX*fSumX4-fSumX3*fSumX2)+
280 fSumX2*(fSumX*fSumYX2-fSumYX*fSumX2))/det;
281 c=
282 (n*(fSumX2*fSumYX2-fSumYX*fSumX3)-
283 fSumX*(fSumX*fSumYX2-fSumYX*fSumX2)+
284 fSumY*(fSumX*fSumX3-fSumX2*fSumX2))/det;
285 }
286}
287
288void AliTPCTempHitInfoV2::Fit(AliTrackHitsParamV2 * param)
289{
53110b9d 290 //
f641f6bd 291 // fit fixing first and the last point
53110b9d 292 // result stored in new param
293 //
b9671574 294 Double_t dx2 = (GetPosition(fStackIndex))[0]-fParam->GetR();
f641f6bd 295 Double_t det = fSumDr4+dx2*fSumDr2-2*dx2*fSumDr3;
b9671574 296 if ( (TMath::Abs(det)> AliTPCTrackHitsV2::GetKPrecision()) &&
297 ((TMath::Abs(dx2)> AliTPCTrackHitsV2::GetKPrecision()))){
298 Double_t dfi2 = (GetPosition(fStackIndex))[1]-fParam->GetFi();
299 param->SetAd((fSumDFiDr2+dfi2*fSumDr-dx2*fSumDFiDr-dfi2*fSumDr3/dx2)/det);
300 param->SetAn((dfi2-param->GetAd()*dx2*dx2)/dx2);
f641f6bd 301
b9671574 302 Double_t dz2 = (GetPosition(fStackIndex))[1]-fParam->GetZ();
303 param->SetTheta((fSumDZDr2+dz2*fSumDr-dx2*fSumDZDr-dz2*fSumDr3/dx2)/det);
304 param->SetTheta((dz2-param->GetAd()*dx2*dx2)/dx2);
f641f6bd 305 }
306
307}
308
179c6296 309AliTrackHitsParamV2::AliTrackHitsParamV2():TObject(),
310 fTrackID(0),
311 fVolumeID(0),
312 fR(0.),
313 fZ(0.),
314 fFi(0.),
315 fAn(0.),
316 fAd(0.),
317 fTheta(0.),
318 fThetaD(0.),
319 fNHits(0),
320 fHitDistance(0),
321 fCharge(0),
322 fTime(0)
f641f6bd 323{
53110b9d 324 //
325 // default constructor
326 //
f641f6bd 327 fgCounter1++;
328 fgCounter2++;
f641f6bd 329}
53110b9d 330
f641f6bd 331AliTrackHitsParamV2::~AliTrackHitsParamV2()
332{
53110b9d 333 //
334 // Standard destructor
335 //
f641f6bd 336 fgCounter1--;
337 if (fHitDistance) {
338 delete[]fHitDistance;
339 fHitDistance=0;
340 }
341 if (fCharge){
342 delete[]fCharge;
343 fCharge =0;
344 }
e61fd20d 345 if (fTime){
346 delete[]fTime;
347 fTime =0;
348 }
f641f6bd 349}
350
af05e6c8 351Float_t AliTrackHitsParamV2::Eta() const
352{
353 Float_t ctg = fZ / fR;
354 Float_t eta = -TMath::Log(TMath::Hypot(1,ctg)-TMath::Abs(ctg));
355 if(ctg < 0) eta = -eta;
356 return eta;
357}
358
f641f6bd 359
179c6296 360AliTPCTrackHitsV2::AliTPCTrackHitsV2():TObject(),
361 fArray(0),
362 fSize(0),
363 fPrecision(0.),
364 fStep(0.),
365 fMaxDistance(0),
366 fNVolumes(0),
367 fVolumes(0),
368 fTempInfo(0),
369 fCurrentHit(0),
370 fHit(0)
f641f6bd 371{
372 //
373 //default constructor
374 //
375 const Float_t kHitPrecision=0.002; //default precision for hit position in cm
376 const Float_t kStep =0.003; //30 mum step
377 const UShort_t kMaxDistance =100; //maximum distance 100
378
379 fPrecision=kHitPrecision; //precision in cm
380 fStep = kStep; //step size
381 fMaxDistance = kMaxDistance; //maximum distance
179c6296 382
f641f6bd 383 //fTrackHitsInfo = new AliObjectArray("AliTrackHitsInfo");
384 //fTrackHitsParam = new AliObjectArray("AliTrackHitsParamV2");
385 //fHitsPosAndQ = new TArrayOfArrayVStack("AliHitInfo");
386 fArray = new TClonesArray("AliTrackHitsParamV2");
387 fCurrentHit = new AliTPCCurrentHitV2;
f641f6bd 388 fgCounter1++;
389 fgCounter2++;
390
391}
392
393AliTPCTrackHitsV2::~AliTPCTrackHitsV2()
394{
395 //
396 //default destructor
397 //
398 // if (fTrackHitsInfo) delete fTrackHitsInfo;
399 if (fArray) {
400 delete fArray;
401 fArray =0;
402 }
403 //if (fHitsPosAndQ) delete fHitsPosAndQ;
404 if (fCurrentHit) delete fCurrentHit;
405 if (fTempInfo) delete fTempInfo;
406 if (fVolumes) {
407 delete [] fVolumes;
408 fVolumes =0;
409 fNVolumes=0;
410 }
fce0283f 411 if (fHit){
412 delete fHit;
413 fHit=0;
414 }
f641f6bd 415 fgCounter1--;
416}
417
5f6e636c 418void AliTPCTrackHitsV2::Clear(Option_t * /*option*/)
f641f6bd 419{
420 //
53110b9d 421 // clear object
422 //
6e493dba 423 fSize = 0;
f641f6bd 424 if (fArray){
425 for (Int_t i=0;i<fArray->GetEntriesFast();i++){
426 AliTrackHitsParamV2 * par = (AliTrackHitsParamV2 *)fArray->UncheckedAt(i);
427 par->~AliTrackHitsParamV2(); // delete object
428 }
429 fArray->Clear();
430 }
431 if (fTempInfo){
432 delete fTempInfo;
fce0283f 433 delete fHit;
434 fHit =0;
f641f6bd 435 fTempInfo =0;
436 }
437 if (fVolumes){
438 delete [] fVolumes;
439 fVolumes=0;
440 fNVolumes=0;
441 }
442}
443
444
445void AliTPCTrackHitsV2::AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x,
e61fd20d 446 Double_t y, Double_t z,Int_t q, Float_t time)
f641f6bd 447{
448 //
53110b9d 449 // add hit to the container - it add hit at the end - input in global coordinata
450 //
f641f6bd 451 Double_t r = TMath::Sqrt(x*x+y*y);
452 Double_t fi = TMath::ACos(x/r);
453 if (y<0) fi*=-1.;
e61fd20d 454 AddHit(volumeID,trackID,r,z,fi,q,time);
f641f6bd 455}
456
457
458void AliTPCTrackHitsV2::AddHit(Int_t volumeID, Int_t trackID,
e61fd20d 459 Double_t r, Double_t z, Double_t fi, Int_t q, Float_t time)
f641f6bd 460{
53110b9d 461 //
462 // Adding one hit
f641f6bd 463 //
464 fSize++;
465 Bool_t diff=kFALSE;
466 if (!fTempInfo) { //initialisation of track - initialisation of parameters
467 fTempInfo = new AliTPCTempHitInfoV2;
b9671574 468 fTempInfo->SetParam(new((*fArray)[0]) AliTrackHitsParamV2);
469 fTempInfo->GetParam()->SetVolumeID(volumeID);
470 fTempInfo->GetParam()->SetTrackID(trackID);
f641f6bd 471 AddVolume(volumeID);
472 //
b9671574 473 fTempInfo->SetParamIndex(0);
e61fd20d 474 fTempInfo->NewParam(r,z,fi,q,time);
f641f6bd 475 return;
476 }
477
478 // if new volume or new trackID
b9671574 479 if ( (volumeID!=fTempInfo->GetParam()->GetVolumeID()) ||
480 (trackID!=fTempInfo->GetParam()->GetTrackID())){
481 if (volumeID!=fTempInfo->GetParam()->GetVolumeID()) AddVolume(volumeID);
f641f6bd 482 diff=kTRUE;
483 FlushHitStack(kTRUE);
484
b9671574 485 fTempInfo->SetParamIndex(fTempInfo->GetParamIndex()+1);
486 fTempInfo->SetParam(new((*fArray)[fTempInfo->GetParamIndex()]) AliTrackHitsParamV2);
487 fTempInfo->GetParam()->SetVolumeID(volumeID);
488 fTempInfo->GetParam()->SetTrackID(trackID);
e61fd20d 489 fTempInfo->NewParam(r,z,fi,q,time);
f641f6bd 490 return;
491 }
492
493 //calculate current fit precission to next point
b9671574 494 AliTrackHitsParamV2 &param = *(fTempInfo->GetParam());
f641f6bd 495 Double_t dd=0;
496 Double_t dl=0;
497 Double_t ratio=0;
498 Double_t dr,dz,dfi,ddz,ddfi;
499 Double_t drhit,ddl;
500 dr=dz=dfi=ddz=ddfi=0;
b9671574 501 drhit = r-fTempInfo->GetOldR();
f641f6bd 502 {
503 //Double_t dfi2 = param.fAn+2*param.fAd*(r-param.fR);
b9671574 504 Double_t dfi2 = param.GetAn();
505 dfi2*=dfi2*fTempInfo->GetOldR()*fTempInfo->GetOldR();
f641f6bd 506 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(r-param.fR);
b9671574 507 Double_t ddz2 = param.GetTheta();
f641f6bd 508 ddz2*=ddz2;
509 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
510 }
c4a237ae 511 //
512 // dl = fStep * Short_t(TMath::Nint(drhit*ratio/fStep)); // MI change - range check
513 dl = drhit*ratio/fStep;
514 if (TMath::Abs(dl)>32765) dl =0;
515 dl = fStep * Short_t(TMath::Nint(dl));
516 //
f641f6bd 517 ddl = dl - drhit*ratio;
b9671574 518 fTempInfo->SetOldR(fTempInfo->GetOldR()+dl/ratio);
519
520 if (fTempInfo->GetStackIndex()>2){
521 dr = r-param.GetR();
522 dz = z-param.GetZ();
523 dfi = fi-param.GetFi();
524 ddz = dr*param.GetTheta()+dr*dr*param.GetThetaD()-dz;
525 ddfi= dr*param.GetAn()+dr*dr*param.GetAd()-dfi;
f641f6bd 526 dd = TMath::Sqrt(ddz*ddz+r*r*ddfi*ddfi+ddl*ddl);
527 //
528 }
529 //safety factor 1.25
530 if ( ( (dd*1.25>fPrecision) ) ||
b9671574 531 (fTempInfo->GetStackIndex()+4>fTempInfo->kStackSize) ||
f641f6bd 532 (TMath::Abs(dl/fStep)>fMaxDistance) )
533 diff=kTRUE;
534 else{ // if precision OK
b9671574 535 fTempInfo->SetStackIndex(fTempInfo->GetStackIndex()+1);
e61fd20d 536 fTempInfo->SetHit(r,z,fi,q,time);
f641f6bd 537 return;
538 }
539
540
541 //if parameter changed
542 if (FlushHitStack(kFALSE)){ //if full buffer flushed
b9671574 543 fTempInfo->SetParamIndex(fTempInfo->GetParamIndex()+1);
544 fTempInfo->SetParam(new((*fArray)[fTempInfo->GetParamIndex()]) AliTrackHitsParamV2);
545 fTempInfo->GetParam()->SetVolumeID(volumeID);
546 fTempInfo->GetParam()->SetTrackID(trackID);
e61fd20d 547 fTempInfo->NewParam(r,z,fi,q,time);
f641f6bd 548 }
549 else{
b9671574 550 fTempInfo->SetStackIndex(fTempInfo->GetStackIndex()+1);
e61fd20d 551 fTempInfo->SetHit(r,z,fi,q,time);
f641f6bd 552 }
553}
554
555Bool_t AliTPCTrackHitsV2::FlushHitStack(Bool_t force)
556{
557 //
53110b9d 558 // write fHitsPosAndQ information from the stack to te arrays
559 //
f641f6bd 560 if (!fTempInfo) return kFALSE;
561
b9671574 562 AliTrackHitsParamV2 & param = *(fTempInfo->GetParam());
f641f6bd 563 //recalculate track parameter not fixing first point
564 fTempInfo->UpdateParam(fStep/4.);
565 //fTempInfo->Fit(fTempInfo->fParam); //- fixing the first and the last point
566
b9671574 567 Double_t oldr = param.GetR();
f641f6bd 568 UInt_t i;
569 Double_t dd;
b9671574 570 param.SetNHits(fTempInfo->GetStackIndex()+1);
571 // if (param.fHitDistance) delete []param.fHitDistance;
572 // if (param.fCharge) delete []param.fCharge;
573 // if (param.fTime) delete []param.fTime;
574 param.SetHitDistance(param.GetNHits());
575 param.SetCharge(param.GetNHits());
576 param.SetTime(param.GetNHits());
f641f6bd 577
578
b9671574 579 for (i=0; i <= fTempInfo->GetStackIndex(); i++){
f641f6bd 580 Double_t * position = fTempInfo->GetPosition(i);
581 Double_t dr = position[0]-oldr;
582 Double_t ratio;
583 {
584 //Double_t dfi2 = param.fAn+2*param.fAd*(position[0]-param.fR);
b9671574 585 Double_t dfi2 = param.GetAn();
f641f6bd 586 dfi2*=dfi2*oldr*oldr;
587 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(position[0]-param.fR);
b9671574 588 Double_t ddz2 = param.GetTheta();
f641f6bd 589 ddz2*=ddz2;
590 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
591 }
592
595c3700 593 // Double_t dl = fStep*(Short_t)TMath::Nint(dr*ratio/fStep); //MI change
594 Double_t dl = dr*ratio/fStep;
595 if (TMath::Abs(dl)>32765) dl =0;
596 dl = fStep * Short_t(TMath::Nint(dl));
597
f641f6bd 598 dr = dl/ratio;
599 oldr+=dr;
600 //calculate precission
b9671574 601 AliTrackHitsParamV2 &param = *(fTempInfo->GetParam());
f641f6bd 602 //real deltas
b9671574 603 Double_t dr1= position[0]-param.GetR();
604 Double_t dz = position[1]-param.GetZ();
605 Double_t dfi = position[2]-param.GetFi();
f641f6bd 606 //extrapolated deltas
b9671574 607 Double_t dr2 = oldr-param.GetR();
f641f6bd 608 Double_t ddr = dr2-dr1;
b9671574 609 Double_t ddz = dr2*param.GetTheta()+dr2*dr2*param.GetThetaD()-dz;
610 Double_t ddfi= dr2*param.GetAn()+dr2*dr2*param.GetAd()-dfi;
f641f6bd 611 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
612
613
614 if ( (dd>fPrecision) ){
615 //if ( (dd<0) ){
616 if (i==0){
b9671574 617 param.SetAn(0);
618 param.SetAd(0);
619 param.SetTheta(0);
620 param.SetThetaD(0);
621 Double_t ddz = dr2*param.GetTheta()+dr2*dr2*param.GetThetaD()-dz;
622 Double_t ddfi= dr2*param.GetAn()+dr2*dr2*param.GetAd()-dfi;
f641f6bd 623 dl = 0;
624 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
625 }
626 else
627 break;
628 }
629
b9671574 630 param.HitDistance(i)= Short_t(TMath::Nint(dl/fStep));
631 param.Charge(i)= Short_t(fTempInfo->GetQStack(i));
632 param.Time(i)= Short_t(fTempInfo->GetTimeStack(i)/AliTPCTrackHitsV2::fgkTimePrecision);
f641f6bd 633 }
634
b9671574 635 if (i<=fTempInfo->GetStackIndex()){ //if previous iteration not succesfull
636 // Short_t * charge = new Short_t[i];
637 // Short_t * time = new Short_t[i];
638 // Short_t * hitDistance= new Short_t[i];
639 // memcpy(charge, param.fCharge,sizeof(Short_t)*i);
640 // memcpy(time, param.fTime,sizeof(Short_t)*i);
641 // memcpy(hitDistance, param.fHitDistance,sizeof(Short_t)*i);
642 // delete [] param.fCharge;
643 // delete [] param.fTime;
644 // delete [] param.fHitDistance;
645 param.SetNHits(i);
646 param.ResizeCharge(i);
647 param.ResizeTime(i);
648 param.ResizeHitDistance(i);
f641f6bd 649 //
b9671574 650 Int_t volumeID = fTempInfo->GetParam()->GetVolumeID();
651 Int_t trackID =fTempInfo->GetParam()->GetTrackID();
652 fTempInfo->SetParamIndex(fTempInfo->GetParamIndex()+1);
653 fTempInfo->SetParam(new((*fArray)[fTempInfo->GetParamIndex()]) AliTrackHitsParamV2);
f641f6bd 654 Double_t * p = fTempInfo->GetPosition(i);
b9671574 655 UInt_t index2 = fTempInfo->GetStackIndex();
656 fTempInfo->NewParam(p[0],p[1],p[2],fTempInfo->GetQStack(i),fTempInfo->GetTimeStack(i));
657 fTempInfo->GetParam()->SetVolumeID(volumeID);
658 fTempInfo->GetParam()->SetTrackID(trackID);
f641f6bd 659 if (i+1<=index2) FlushHitStack2(i+1,index2);
660
661 if (force) return FlushHitStack(kTRUE);
662 return kFALSE;
663 }
664 return kTRUE;
665}
666
667
668void AliTPCTrackHitsV2::FlushHitStack2(Int_t index1, Int_t index2)
669{
670 //
671 // second iteration flush stack
53110b9d 672 // call only for hits where first iteration were not succesfully interpolated
673 //
f641f6bd 674 Double_t * positionstack = new Double_t[3*(index2-index1+1)];
675 UInt_t * qstack = new UInt_t[index2-index1+1];
e61fd20d 676 Float_t * timestack = new Float_t[index2-index1+1];
b9671574 677 memcpy(positionstack, fTempInfo->GetPosition(index1),
f641f6bd 678 (3*(index2-index1+1))*sizeof(Double_t));
b9671574 679 memcpy(qstack, fTempInfo->GetQStackP(index1),(index2-index1+1)*sizeof(UInt_t));
680 memcpy(timestack, fTempInfo->GetTimeStackP(index1),(index2-index1+1)*sizeof(Float_t));
f641f6bd 681 Double_t *p = positionstack;
682 for (Int_t j=0; j<=index2-index1;j++){
b9671574 683 fTempInfo->SetStackIndex(fTempInfo->GetStackIndex()+1);
e61fd20d 684 fTempInfo->SetHit(p[3*j+0],p[3*j+1],p[3*j+2],qstack[j],timestack[j]);
f641f6bd 685 }
686 delete []positionstack;
687 delete []qstack;
e61fd20d 688 delete []timestack;
f641f6bd 689}
690
691
692void AliTPCTrackHitsV2::AddVolume(Int_t volume)
693{
694 //
695 //add volumes to tthe list of volumes
53110b9d 696 //
f641f6bd 697 Int_t * volumes = new Int_t[fNVolumes+1];
f55b9162 698 if (fVolumes) memcpy(volumes,fVolumes,(fNVolumes)*sizeof(Int_t));
f641f6bd 699 volumes[fNVolumes]=volume;
700 fNVolumes++;
701 if (fVolumes) delete []fVolumes;
702 fVolumes = volumes;
703}
704
705
f641f6bd 706Bool_t AliTPCTrackHitsV2::First()
707{
708 //
709 //set Current hit for the first hit
710 //
6e493dba 711
712 if (fArray->GetSize()<=0) {
b9671574 713 fCurrentHit->SetStatus(kFALSE);
6e493dba 714 return kFALSE;
715 }
716
f641f6bd 717 AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(0);
fce0283f 718 if (!fHit) fHit = new AliTPChit;
f641f6bd 719 if (!(param) ) {
b9671574 720 fCurrentHit->SetStatus(kFALSE);
f641f6bd 721 return kFALSE;
722 }
723 //
b9671574 724 fCurrentHit->SetParamIndex(0);
725 fCurrentHit->SetStackIndex(0);
f641f6bd 726 //
fce0283f 727 //
b9671574 728 ((AliTPChit*)fHit)->fSector = param->GetVolumeID();
729 ((AliTPChit*)fHit)->SetTrack(param->GetTrackID());
730 ((AliTPChit*)fHit)->SetX(param->GetR()*TMath::Cos(param->GetFi()));
731 ((AliTPChit*)fHit)->SetY(param->GetR()*TMath::Sin(param->GetFi()));
732 ((AliTPChit*)fHit)->SetZ(param->GetZ());
733 ((AliTPChit*)fHit)->fQ = param->Charge(0);
734 ((AliTPChit*)fHit)->fTime = (Float_t)(param->Time(0)*AliTPCTrackHitsV2::fgkTimePrecision);
fce0283f 735 /*
736 fCurrentHit->fHit.fSector = param->fVolumeID;
737 fCurrentHit->fHit.SetTrack(param->fTrackID);
738 fCurrentHit->fHit.SetX(param->fR*TMath::Cos(param->fFi));
739 fCurrentHit->fHit.SetY(param->fR*TMath::Sin(param->fFi));
740 fCurrentHit->fHit.SetZ(param->fZ);
741 fCurrentHit->fHit.fQ = param->fCharge[0];
e61fd20d 742 fCurrentHit->fHit.fTime = (Float_t)(param->fTime[0]*AliTPCTrackHitsV2::fgkTimePrecision);
fce0283f 743 */
b9671574 744 fCurrentHit->SetR(param->GetR());
f641f6bd 745
b9671574 746 fCurrentHit->SetStatus(kTRUE);
747 return fCurrentHit->GetStatus();
f641f6bd 748}
749
750Bool_t AliTPCTrackHitsV2::Next()
751{
752 //
53110b9d 753 // Hit iterator
754 //
b9671574 755 if (!(fCurrentHit->GetStatus()))
f641f6bd 756 return kFALSE;
757
b9671574 758 fCurrentHit->SetStackIndex(fCurrentHit->GetStackIndex()+1);
f641f6bd 759
b9671574 760 AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->GetParamIndex());
761 if (fCurrentHit->GetStackIndex()>=param->GetNHits()){
762 fCurrentHit->SetParamIndex(fCurrentHit->GetParamIndex()+1);
763 if (fCurrentHit->GetParamIndex()>=fArray->GetEntriesFast()){
764 fCurrentHit->SetStatus(kFALSE);
f641f6bd 765 return kFALSE;
766 }
b9671574 767 param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->GetParamIndex());
768 fCurrentHit->SetStackIndex(0);
769 fCurrentHit->SetR(param->GetR());
f641f6bd 770 }
771
772
773
774 Double_t ratio;
775 {
776 // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
b9671574 777 Double_t dfi2 = param->GetAn();
778 dfi2*=dfi2*fCurrentHit->GetR()*fCurrentHit->GetR();
f641f6bd 779 // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
b9671574 780 Double_t ddz2 = param->GetTheta();
f641f6bd 781 ddz2*=ddz2;
782 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
783 }
784
b9671574 785 fCurrentHit->SetR(fCurrentHit->GetR()+fStep*param->HitDistance(fCurrentHit->GetStackIndex())/ratio);
f641f6bd 786
b9671574 787 Double_t dR = fCurrentHit->GetR() - param->GetR();
788 Double_t fi = param->GetFi() + (param->GetAn()*dR+param->GetAd()*dR*dR);
789 Double_t z = param->GetZ() + (param->GetTheta()*dR+param->GetThetaD()*dR*dR);
fce0283f 790 /*
f641f6bd 791 fCurrentHit->fHit.fQ = param->fCharge[fCurrentHit->fStackIndex];
e61fd20d 792 fCurrentHit->fHit.fTime = (Float_t)(param->fTime[fCurrentHit->fStackIndex]*AliTPCTrackHitsV2::fgkTimePrecision);
f641f6bd 793 fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
794 fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
795 fCurrentHit->fHit.SetZ(z);
796 fCurrentHit->fHit.fSector = param->fVolumeID;
797 fCurrentHit->fHit.SetTrack(param->fTrackID);
fce0283f 798 */
b9671574 799 ((AliTPChit*)fHit)->fQ = param->Charge(fCurrentHit->GetStackIndex());
800 ((AliTPChit*)fHit)->fTime = (Float_t)(param->Time(fCurrentHit->GetStackIndex())*AliTPCTrackHitsV2::fgkTimePrecision);
801 ((AliTPChit*)fHit)->SetX(fCurrentHit->GetR()*TMath::Cos(fi));
802 ((AliTPChit*)fHit)->SetY(fCurrentHit->GetR()*TMath::Sin(fi));
fce0283f 803 ((AliTPChit*)fHit)->SetZ(z);
b9671574 804 ((AliTPChit*)fHit)->fSector = param->GetVolumeID();
805 ((AliTPChit*)fHit)->SetTrack(param->GetTrackID());
fce0283f 806
f641f6bd 807 return kTRUE;
808}
809
53110b9d 810AliHit * AliTPCTrackHitsV2::GetHit() const
f641f6bd 811{
53110b9d 812 //
813 // Return one hit
f641f6bd 814 //
b9671574 815 return (fCurrentHit->GetStatus())? fHit:0;
f641f6bd 816 //return &fCurrentHit->fHit;
817
818}
819
820AliTrackHitsParamV2 * AliTPCTrackHitsV2::GetParam()
821{
53110b9d 822 //
823 // Return current parameters
824 //
b9671574 825 return (fCurrentHit->GetStatus())?
826 (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->GetParamIndex()):0;
f641f6bd 827}
53110b9d 828