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