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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
16/*
17$Log$
b9d0a01d 18Revision 1.4.6.1 2002/07/26 12:12:55 alibrary
19Updating VirtualMC
20
21Revision 1.5 2002/07/25 16:56:52 hristov
22fSize set to zero in Clear(). The size of the array is checked in First() (M.Ivanov)
23
6e493dba 24Revision 1.4 2002/03/01 10:19:06 hristov
25Additional protection (M.Ivanov)
26
fce0283f 27Revision 1.1 2002/01/21 17:14:21 kowal2
28New track hits using root containers.
29
f641f6bd 30*/
31///////////////////////////////////////////////////////////////////////////////
32// //
33// Time Projection Chamber track hits object //
34//
35// Origin: Marian Ivanov , GSI Darmstadt
36//
37// AliTPCTrackHitsV2
38// Container for Track Hits - based on standard TClonesArray -
39// fArray of AliTPCTrackHitsParamV2
40// In AliTPCTrackHitsParamV2 - parameterization of the track segment is stored
41// for each of the track segment - relative position ( distance between hits) and
42// charge of the hits is stored - comparing to classical TClonesArray of AliTPChit -
43// comperssion factor of 5-7 (depending on the required precision) -
44// In future release AliTPCTrackHitsV2 - will replace old AliTPCTrackHits - which were not
45// based on standard ROOT containers
46// Basic function:
47// // during building Container
48// AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x, Double_t y, Double_t z,Int_t q)
49// void SetHitPrecision(Double_t prec) {fPrecision=prec;}
50// void SetStepPrecision(Double_t prec) {fStep=prec;}
51// Bool_t FlushHitStack(Bool_t force=kTRUE);
52// //at the end necessary to have Container in consistent state
53//
54// // looping over Container
55// Bool_t First(), Bool_t Next() - iterators - return status of the operation
56// AliTPChit * GetHit(); - return current hit
57
58
59//Begin_Html
60/*
61<img src="gif/AliTPCTrackHitsV2.gif">
62*/
63//End_Html
64// //
65// //
66///////////////////////////////////////////////////////////////////////////////
67
68//#include "TVector3.h"
69#include "AliTPCTrackHitsV2.h"
70
71#include "TClonesArray.h"
72#include "AliTPC.h"
73
74#include <iostream.h>
75
76
77
78ClassImp(AliTPCTrackHitsV2)
79ClassImp(AliTrackHitsParamV2)
80
81 //
82Int_t AliTrackHitsParamV2::fgCounter1 =0;
83Int_t AliTrackHitsParamV2::fgCounter2 =0;
84//
85Int_t AliTPCTrackHitsV2::fgCounter1 =0;
86Int_t AliTPCTrackHitsV2::fgCounter2 =0;
87//
88const Double_t AliTPCTrackHitsV2::fgkPrecision=1e-6; //precision
89const Double_t AliTPCTrackHitsV2::fgkPrecision2=1e-20; //precision
90
91
92
93
f641f6bd 94struct AliTPCTempHitInfoV2 {
95 enum { fkStackSize = 10000};
96 AliTPCTempHitInfoV2();
97 void NewParam(Double_t r, Double_t z, Double_t fi, Int_t q);
98 void SetHit(Double_t r, Double_t z, Double_t fi, Int_t q);
99 Double_t * GetPosition(Int_t index){return &fPositionStack[index*3];}
100 void UpdateParam(Double_t maxdelta); //recal
101 void Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
102 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
103 Double_t fSumX4, Int_t n,
104 Double_t &a, Double_t &b, Double_t &c);
105 void Fit(AliTrackHitsParamV2 * param);
106 Double_t fSumDr; //
107 Double_t fSumDr2; //
108 Double_t fSumDr3; //
109 Double_t fSumDr4; //
110 Double_t fSumDFi; //
111 Double_t fSumDFiDr; //
112 Double_t fSumDFiDr2;//
113 Double_t fSumDZ; //
114 Double_t fSumDZDr; //
115 Double_t fSumDZDr2; //
116 Double_t fOldR; //previos r
117 Double_t fPositionStack[3*fkStackSize]; //position stack
118 UInt_t fQStack[fkStackSize]; //Q stack
119 UInt_t fStackIndex; //current stack index
120 // UInt_t fInfoIndex; //current track info index
121 UInt_t fParamIndex; //current track parameters index
122 // AliTrackHitsInfo * fInfo; //current track info
123 AliTrackHitsParamV2 * fParam; //current track param
124};
125
126
127AliTPCTempHitInfoV2::AliTPCTempHitInfoV2()
128{
129 //
130 //set to default value
131 fSumDr=fSumDr2=fSumDr3=fSumDr4=
132 fSumDFi=fSumDFiDr=fSumDFiDr2=
133 fSumDZ=fSumDZDr=fSumDZDr2=0;
134 fStackIndex = 0;
135 // fInfoIndex = 0;
136 fParamIndex = 0;
137}
138
139
140void AliTPCTempHitInfoV2::NewParam(Double_t r, Double_t z, Double_t fi, Int_t q)
141{
142 //
143 //reset stack and sum parameters
144 //store line initial point
145 fSumDr=fSumDr2=fSumDr3=fSumDr4=
146 fSumDFi=fSumDFiDr=fSumDFiDr2=
147 fSumDZ=fSumDZDr=fSumDZDr2=0;
148 fStackIndex=0;
149 fParam->fR = r;
150 fOldR = r;
151 fParam->fZ = z;
152 fParam->fFi = fi;
153 fParam->fAn = 0.;
154 fParam->fAd = 0.;
155 fParam->fTheta =0.;
156 fParam->fThetaD =0.;
157 SetHit(r,z,fi,q);
158}
159
160void AliTPCTempHitInfoV2::SetHit(Double_t r, Double_t z, Double_t fi, Int_t q)
161{
162 //
163 //add hit to the stack
164 //recalculate new estimete of line parameters
165 Double_t *f = GetPosition(fStackIndex);
166 f[0] = r;
167 f[1] = z;
168 f[2] = fi;
169 fQStack[fStackIndex]=q;
170 if (fStackIndex==0) return;
171 Double_t dr = (r-fParam->fR);
172 if (TMath::Abs(dr)<AliTPCTrackHitsV2::fgkPrecision) dr =AliTPCTrackHitsV2::fgkPrecision;
173 Double_t dfi = fi-fParam->fFi;
174 Double_t dz = z -fParam->fZ;
175 Double_t dr2 =dr*dr;
176 Double_t dr3 =dr2*dr;
177 Double_t dr4 =dr3*dr;
178 fSumDr +=dr;
179 fSumDr2+=dr2;
180 fSumDr3+=dr3;
181 fSumDr4+=dr4;
182 fSumDFi +=dfi;
183 fSumDFiDr+=dfi*dr;
184 fSumDFiDr2+=dfi*dr2;
185 fSumDZ +=dz;
186 fSumDZDr+=dz*dr;
187 fSumDZDr2+=dz*dr2;
188
189 //update fit parameters
190 //
191 Double_t det = fSumDr2*fSumDr4-fSumDr3*fSumDr3;
192 if (TMath::Abs(det)<AliTPCTrackHitsV2::fgkPrecision2) return;
193 if ( ( fStackIndex>1 ) ){
194 fParam->fAn = (fSumDr4*fSumDFiDr-fSumDr3*fSumDFiDr2)/det;
195 fParam->fAd = (fSumDr2*fSumDFiDr2-fSumDr3*fSumDFiDr)/det;
196 }
197 else
198 fParam->fAn = fSumDFiDr/fSumDr2;
199 if ( ( fStackIndex>1 ) ){
200 fParam->fTheta = (fSumDr4*fSumDZDr-fSumDr3*fSumDZDr2)/det;
201 fParam->fThetaD= (fSumDr2*fSumDZDr2-fSumDr3*fSumDZDr)/det;
202 }
203 else
204 fParam->fTheta = fSumDZDr/fSumDr2;
205}
206
207
208void AliTPCTempHitInfoV2::UpdateParam(Double_t maxdelta)
209{
210 //recalc parameters not fixing origin point
211 if (fStackIndex>5){
212 Double_t a,b,c;
213 a=b=c=0;
214 Fit2(fSumDFi, fSumDFiDr, fSumDFiDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
215 fStackIndex, a,b,c);
216 if (TMath::Abs(a)<maxdelta){
217 fParam->fFi +=a/fParam->fR;
218 fParam->fAn = b;
219 fParam->fAd = c;
220 }
221 Fit2(fSumDZ, fSumDZDr, fSumDZDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
222 fStackIndex, a,b,c) ;
223 if (TMath::Abs(a)<maxdelta){
224 fParam->fZ +=a;
225 fParam->fTheta = b;
226 fParam->fThetaD = c;
227 }
228 }
229
230}
231void AliTPCTempHitInfoV2::Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
232 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
233 Double_t fSumX4, Int_t n,
234 Double_t &a, Double_t &b, Double_t &c)
235{
236 //fit of second order
237 Double_t det =
238 n* (fSumX2*fSumX4-fSumX3*fSumX3) -
239 fSumX* (fSumX*fSumX4-fSumX3*fSumX2)+
240 fSumX2* (fSumX*fSumX3-fSumX2*fSumX2);
241
242 if (TMath::Abs(det)> AliTPCTrackHitsV2::fgkPrecision) {
243 a =
244 (fSumY * (fSumX2*fSumX4-fSumX3*fSumX3)-
245 fSumX *(fSumYX*fSumX4-fSumYX2*fSumX3)+
246 fSumX2*(fSumYX*fSumX3-fSumYX2*fSumX2))/det;
247 b=
248 (n*(fSumYX*fSumX4-fSumX3*fSumYX2)-
249 fSumY*(fSumX*fSumX4-fSumX3*fSumX2)+
250 fSumX2*(fSumX*fSumYX2-fSumYX*fSumX2))/det;
251 c=
252 (n*(fSumX2*fSumYX2-fSumYX*fSumX3)-
253 fSumX*(fSumX*fSumYX2-fSumYX*fSumX2)+
254 fSumY*(fSumX*fSumX3-fSumX2*fSumX2))/det;
255 }
256}
257
258void AliTPCTempHitInfoV2::Fit(AliTrackHitsParamV2 * param)
259{
260 // fit fixing first and the last point
261 //result stored in new param
262 Double_t dx2 = (GetPosition(fStackIndex))[0]-fParam->fR;
263 Double_t det = fSumDr4+dx2*fSumDr2-2*dx2*fSumDr3;
264 if ( (TMath::Abs(det)> AliTPCTrackHitsV2::fgkPrecision) &&
265 ((TMath::Abs(dx2)> AliTPCTrackHitsV2::fgkPrecision))){
266 Double_t dfi2 = (GetPosition(fStackIndex))[1]-fParam->fFi;
267 param->fAd = (fSumDFiDr2+dfi2*fSumDr-dx2*fSumDFiDr-dfi2*fSumDr3/dx2)/det;
268 param->fAn = (dfi2-param->fAd*dx2*dx2)/dx2;
269
270 Double_t dz2 = (GetPosition(fStackIndex))[1]-fParam->fZ;
271 param->fTheta = (fSumDZDr2+dz2*fSumDr-dx2*fSumDZDr-dz2*fSumDr3/dx2)/det;
272 param->fTheta = (dz2-param->fAd*dx2*dx2)/dx2;
273 }
274
275}
276
277AliTrackHitsParamV2::AliTrackHitsParamV2()
278{
279 //default constructor
280 fgCounter1++;
281 fgCounter2++;
282 fHitDistance=0;
283 fCharge=0;
284 fNHits=0;
285}
286AliTrackHitsParamV2::~AliTrackHitsParamV2()
287{
288 fgCounter1--;
289 if (fHitDistance) {
290 delete[]fHitDistance;
291 fHitDistance=0;
292 }
293 if (fCharge){
294 delete[]fCharge;
295 fCharge =0;
296 }
297}
298
299
300AliTPCTrackHitsV2::AliTPCTrackHitsV2()
301{
302 //
303 //default constructor
304 //
305 const Float_t kHitPrecision=0.002; //default precision for hit position in cm
306 const Float_t kStep =0.003; //30 mum step
307 const UShort_t kMaxDistance =100; //maximum distance 100
308
309 fPrecision=kHitPrecision; //precision in cm
310 fStep = kStep; //step size
311 fMaxDistance = kMaxDistance; //maximum distance
312 fTempInfo =0;
313 fSize=0;
314 //fTrackHitsInfo = new AliObjectArray("AliTrackHitsInfo");
315 //fTrackHitsParam = new AliObjectArray("AliTrackHitsParamV2");
316 //fHitsPosAndQ = new TArrayOfArrayVStack("AliHitInfo");
317 fArray = new TClonesArray("AliTrackHitsParamV2");
318 fCurrentHit = new AliTPCCurrentHitV2;
319 fVolumes =0;
320 fNVolumes =0;
fce0283f 321 fHit =0;
f641f6bd 322 fgCounter1++;
323 fgCounter2++;
324
325}
326
327AliTPCTrackHitsV2::~AliTPCTrackHitsV2()
328{
329 //
330 //default destructor
331 //
332 // if (fTrackHitsInfo) delete fTrackHitsInfo;
333 if (fArray) {
334 delete fArray;
335 fArray =0;
336 }
337 //if (fHitsPosAndQ) delete fHitsPosAndQ;
338 if (fCurrentHit) delete fCurrentHit;
339 if (fTempInfo) delete fTempInfo;
340 if (fVolumes) {
341 delete [] fVolumes;
342 fVolumes =0;
343 fNVolumes=0;
344 }
fce0283f 345 if (fHit){
346 delete fHit;
347 fHit=0;
348 }
f641f6bd 349 fgCounter1--;
350}
351
352void AliTPCTrackHitsV2::Clear()
353{
354 //
355 //clear object
6e493dba 356 fSize = 0;
f641f6bd 357 if (fArray){
358 for (Int_t i=0;i<fArray->GetEntriesFast();i++){
359 AliTrackHitsParamV2 * par = (AliTrackHitsParamV2 *)fArray->UncheckedAt(i);
360 par->~AliTrackHitsParamV2(); // delete object
361 }
362 fArray->Clear();
363 }
364 if (fTempInfo){
365 delete fTempInfo;
fce0283f 366 delete fHit;
367 fHit =0;
f641f6bd 368 fTempInfo =0;
369 }
370 if (fVolumes){
371 delete [] fVolumes;
372 fVolumes=0;
373 fNVolumes=0;
374 }
375}
376
377
378void AliTPCTrackHitsV2::AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x,
379 Double_t y, Double_t z,Int_t q)
380{
381 //
382 //add hit to the container - it add hit at the end - input in global coordinata
383 Double_t r = TMath::Sqrt(x*x+y*y);
384 Double_t fi = TMath::ACos(x/r);
385 if (y<0) fi*=-1.;
386 AddHit(volumeID,trackID,r,z,fi,q);
387}
388
389
390void AliTPCTrackHitsV2::AddHit(Int_t volumeID, Int_t trackID,
391 Double_t r, Double_t z, Double_t fi, Int_t q)
392{
393 //
394 fSize++;
395 Bool_t diff=kFALSE;
396 if (!fTempInfo) { //initialisation of track - initialisation of parameters
397 fTempInfo = new AliTPCTempHitInfoV2;
398 fTempInfo->fParam = new((*fArray)[0]) AliTrackHitsParamV2;
399 fTempInfo->fParam->fVolumeID = volumeID;
400 fTempInfo->fParam->fTrackID = trackID;
401 AddVolume(volumeID);
402 //
403 fTempInfo->fParamIndex = 0;
404 fTempInfo->NewParam(r,z,fi,q);
405 return;
406 }
407
408 // if new volume or new trackID
409 if ( (volumeID!=fTempInfo->fParam->fVolumeID) ||
410 (trackID!=fTempInfo->fParam->fTrackID)){
411 if (volumeID!=fTempInfo->fParam->fVolumeID) AddVolume(volumeID);
412 diff=kTRUE;
413 FlushHitStack(kTRUE);
414
415 fTempInfo->fParamIndex++;
416 fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
417 fTempInfo->fParam->fVolumeID = volumeID;
418 fTempInfo->fParam->fTrackID = trackID;
419 fTempInfo->NewParam(r,z,fi,q);
420 return;
421 }
422
423 //calculate current fit precission to next point
424 AliTrackHitsParamV2 &param = *(fTempInfo->fParam);
425 Double_t dd=0;
426 Double_t dl=0;
427 Double_t ratio=0;
428 Double_t dr,dz,dfi,ddz,ddfi;
429 Double_t drhit,ddl;
430 dr=dz=dfi=ddz=ddfi=0;
431 drhit = r-fTempInfo->fOldR;
432 {
433 //Double_t dfi2 = param.fAn+2*param.fAd*(r-param.fR);
434 Double_t dfi2 = param.fAn;
435 dfi2*=dfi2*fTempInfo->fOldR*fTempInfo->fOldR;
436 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(r-param.fR);
437 Double_t ddz2 = param.fTheta;
438 ddz2*=ddz2;
439 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
440 }
c4a237ae 441 //
442 // dl = fStep * Short_t(TMath::Nint(drhit*ratio/fStep)); // MI change - range check
443 dl = drhit*ratio/fStep;
444 if (TMath::Abs(dl)>32765) dl =0;
445 dl = fStep * Short_t(TMath::Nint(dl));
446 //
f641f6bd 447 ddl = dl - drhit*ratio;
448 fTempInfo->fOldR += dl/ratio;
449
450 if (fTempInfo->fStackIndex>2){
451 dr = r-param.fR;
452 dz = z-param.fZ;
453 dfi = fi-param.fFi;
454 ddz = dr*param.fTheta+dr*dr*param.fThetaD-dz;
455 ddfi= dr*param.fAn+dr*dr*param.fAd-dfi;
456 dd = TMath::Sqrt(ddz*ddz+r*r*ddfi*ddfi+ddl*ddl);
457 //
458 }
459 //safety factor 1.25
460 if ( ( (dd*1.25>fPrecision) ) ||
461 (fTempInfo->fStackIndex+4>fTempInfo->fkStackSize) ||
462 (TMath::Abs(dl/fStep)>fMaxDistance) )
463 diff=kTRUE;
464 else{ // if precision OK
465 fTempInfo->fStackIndex++;
466 fTempInfo->SetHit(r,z,fi,q);
467 return;
468 }
469
470
471 //if parameter changed
472 if (FlushHitStack(kFALSE)){ //if full buffer flushed
473 fTempInfo->fParamIndex++;
474 fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
475 fTempInfo->fParam->fVolumeID = volumeID;
476 fTempInfo->fParam->fTrackID = trackID;
477 fTempInfo->NewParam(r,z,fi,q);
478 }
479 else{
480 fTempInfo->fStackIndex++;
481 fTempInfo->SetHit(r,z,fi,q);
482 }
483}
484
485Bool_t AliTPCTrackHitsV2::FlushHitStack(Bool_t force)
486{
487 //
488 //write fHitsPosAndQ information from the stack to te arrays
489 if (!fTempInfo) return kFALSE;
490
491 AliTrackHitsParamV2 & param = *(fTempInfo->fParam);
492 //recalculate track parameter not fixing first point
493 fTempInfo->UpdateParam(fStep/4.);
494 //fTempInfo->Fit(fTempInfo->fParam); //- fixing the first and the last point
495
496 Double_t oldr = param.fR;
497 UInt_t i;
498 Double_t dd;
499 param.fNHits = fTempInfo->fStackIndex+1;
500 if (param.fHitDistance) delete []param.fHitDistance;
501 if (param.fCharge) delete []param.fCharge;
502 param.fHitDistance = new Short_t[param.fNHits];
503 param.fCharge = new Short_t[param.fNHits];
504
505
506 for (i=0; i <= fTempInfo->fStackIndex; i++){
507 Double_t * position = fTempInfo->GetPosition(i);
508 Double_t dr = position[0]-oldr;
509 Double_t ratio;
510 {
511 //Double_t dfi2 = param.fAn+2*param.fAd*(position[0]-param.fR);
512 Double_t dfi2 = param.fAn;
513 dfi2*=dfi2*oldr*oldr;
514 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(position[0]-param.fR);
515 Double_t ddz2 = param.fTheta;
516 ddz2*=ddz2;
517 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
518 }
519
595c3700 520 // Double_t dl = fStep*(Short_t)TMath::Nint(dr*ratio/fStep); //MI change
521 Double_t dl = dr*ratio/fStep;
522 if (TMath::Abs(dl)>32765) dl =0;
523 dl = fStep * Short_t(TMath::Nint(dl));
524
f641f6bd 525 dr = dl/ratio;
526 oldr+=dr;
527 //calculate precission
528 AliTrackHitsParamV2 &param = *(fTempInfo->fParam);
529 //real deltas
530 Double_t dr1= position[0]-param.fR;
531 Double_t dz = position[1]-param.fZ;
532 Double_t dfi = position[2]-param.fFi;
533 //extrapolated deltas
534 Double_t dr2 = oldr-param.fR;
535 Double_t ddr = dr2-dr1;
536 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
537 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
538 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
539
540
541 if ( (dd>fPrecision) ){
542 //if ( (dd<0) ){
543 if (i==0){
544 param.fAn = 0;
545 param.fAd = 0;
546 param.fTheta =0;
547 param.fThetaD =0;
548 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
549 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
550 dl = 0;
551 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
552 }
553 else
554 break;
555 }
556
557 param.fHitDistance[i]= Short_t(TMath::Nint(dl/fStep));
558 param.fCharge[i]= Short_t(fTempInfo->fQStack[i]);
559 }
560
561 if (i<=fTempInfo->fStackIndex){ //if previous iteration not succesfull
562 Short_t * charge = new Short_t[i];
563 Short_t * hitDistance= new Short_t[i];
564 memcpy(charge, param.fCharge,sizeof(Short_t)*i);
565 memcpy(hitDistance, param.fHitDistance,sizeof(Short_t)*i);
566 delete [] param.fCharge;
567 delete [] param.fHitDistance;
568 param.fNHits= i;
569 param.fCharge = charge;
570 param.fHitDistance = hitDistance;
571 //
572 Int_t volumeID = fTempInfo->fParam->fVolumeID;
573 Int_t trackID =fTempInfo->fParam->fTrackID;
574 fTempInfo->fParamIndex++;
575 fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
576 Double_t * p = fTempInfo->GetPosition(i);
577 UInt_t index2 = fTempInfo->fStackIndex;
578 fTempInfo->NewParam(p[0],p[1],p[2],fTempInfo->fQStack[i]);
579 fTempInfo->fParam->fVolumeID= volumeID;
580 fTempInfo->fParam->fTrackID= trackID;
581 if (i+1<=index2) FlushHitStack2(i+1,index2);
582
583 if (force) return FlushHitStack(kTRUE);
584 return kFALSE;
585 }
586 return kTRUE;
587}
588
589
590void AliTPCTrackHitsV2::FlushHitStack2(Int_t index1, Int_t index2)
591{
592 //
593 // second iteration flush stack
594 // call only for hits where first iteration were not succesfully interpolated
595 Double_t * positionstack = new Double_t[3*(index2-index1+1)];
596 UInt_t * qstack = new UInt_t[index2-index1+1];
597 memcpy(positionstack, &fTempInfo->fPositionStack[3*index1],
598 (3*(index2-index1+1))*sizeof(Double_t));
599 memcpy(qstack, &fTempInfo->fQStack[index1],(index2-index1+1)*sizeof(UInt_t));
600 Double_t *p = positionstack;
601 for (Int_t j=0; j<=index2-index1;j++){
602 fTempInfo->fStackIndex++;
603 fTempInfo->SetHit(p[3*j+0],p[3*j+1],p[3*j+2],qstack[j]);
604 }
605 delete []positionstack;
606 delete []qstack;
607}
608
609
610void AliTPCTrackHitsV2::AddVolume(Int_t volume)
611{
612 //
613 //add volumes to tthe list of volumes
614 Int_t * volumes = new Int_t[fNVolumes+1];
615 if (fVolumes) memcpy(volumes,fVolumes,(fNVolumes+1)*sizeof(Int_t));
616 volumes[fNVolumes]=volume;
617 fNVolumes++;
618 if (fVolumes) delete []fVolumes;
619 fVolumes = volumes;
620}
621
622
623
624
625
626Bool_t AliTPCTrackHitsV2::First()
627{
628 //
629 //set Current hit for the first hit
630 //
6e493dba 631
632 if (fArray->GetSize()<=0) {
633 fCurrentHit->fStatus = kFALSE;
634 return kFALSE;
635 }
636
f641f6bd 637 AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(0);
fce0283f 638 if (!fHit) fHit = new AliTPChit;
f641f6bd 639 if (!(param) ) {
640 fCurrentHit->fStatus = kFALSE;
641 return kFALSE;
642 }
643 //
644 fCurrentHit->fParamIndex = 0;
645 fCurrentHit->fStackIndex = 0;
646 //
fce0283f 647 //
648 ((AliTPChit*)fHit)->fSector = param->fVolumeID;
649 ((AliTPChit*)fHit)->SetTrack(param->fTrackID);
650 ((AliTPChit*)fHit)->SetX(param->fR*TMath::Cos(param->fFi));
651 ((AliTPChit*)fHit)->SetY(param->fR*TMath::Sin(param->fFi));
652 ((AliTPChit*)fHit)->SetZ(param->fZ);
653 ((AliTPChit*)fHit)->fQ = param->fCharge[0];
654 /*
655 fCurrentHit->fHit.fSector = param->fVolumeID;
656 fCurrentHit->fHit.SetTrack(param->fTrackID);
657 fCurrentHit->fHit.SetX(param->fR*TMath::Cos(param->fFi));
658 fCurrentHit->fHit.SetY(param->fR*TMath::Sin(param->fFi));
659 fCurrentHit->fHit.SetZ(param->fZ);
660 fCurrentHit->fHit.fQ = param->fCharge[0];
661 */
f641f6bd 662 fCurrentHit->fR = param->fR;
663
664 return fCurrentHit->fStatus = kTRUE;
665}
666
667Bool_t AliTPCTrackHitsV2::Next()
668{
669 //
670 //
671 if (!(fCurrentHit->fStatus))
672 return kFALSE;
673
674 fCurrentHit->fStackIndex++;
675
676 AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex);
677 if (fCurrentHit->fStackIndex>=param->fNHits){
678 fCurrentHit->fParamIndex++;
679 if (fCurrentHit->fParamIndex>=fArray->GetEntriesFast()){
680 fCurrentHit->fStatus=kFALSE;
681 return kFALSE;
682 }
683 param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex);
684 fCurrentHit->fStackIndex=0;
685 fCurrentHit->fR = param->fR;
686 }
687
688
689
690 Double_t ratio;
691 {
692 // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
693 Double_t dfi2 = param->fAn;
694 dfi2*=dfi2*fCurrentHit->fR*fCurrentHit->fR;
695 // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
696 Double_t ddz2 = param->fTheta;
697 ddz2*=ddz2;
698 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
699 }
700
701 fCurrentHit->fR += fStep*param->fHitDistance[fCurrentHit->fStackIndex]/ratio;
702
703 Double_t dR = fCurrentHit->fR - param->fR;
704 Double_t fi = param->fFi + (param->fAn*dR+param->fAd*dR*dR);
705 Double_t z = param->fZ + (param->fTheta*dR+param->fThetaD*dR*dR);
fce0283f 706 /*
f641f6bd 707 fCurrentHit->fHit.fQ = param->fCharge[fCurrentHit->fStackIndex];
708 fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
709 fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
710 fCurrentHit->fHit.SetZ(z);
711 fCurrentHit->fHit.fSector = param->fVolumeID;
712 fCurrentHit->fHit.SetTrack(param->fTrackID);
fce0283f 713 */
714 ((AliTPChit*)fHit)->fQ = param->fCharge[fCurrentHit->fStackIndex];
715 ((AliTPChit*)fHit)->SetX(fCurrentHit->fR*TMath::Cos(fi));
716 ((AliTPChit*)fHit)->SetY(fCurrentHit->fR*TMath::Sin(fi));
717 ((AliTPChit*)fHit)->SetZ(z);
718 ((AliTPChit*)fHit)->fSector = param->fVolumeID;
719 ((AliTPChit*)fHit)->SetTrack(param->fTrackID);
720
f641f6bd 721 return kTRUE;
722}
723
fce0283f 724AliHit * AliTPCTrackHitsV2::GetHit()
f641f6bd 725{
726 //
fce0283f 727 return (fCurrentHit->fStatus)? fHit:0;
f641f6bd 728 //return &fCurrentHit->fHit;
729
730}
731
732AliTrackHitsParamV2 * AliTPCTrackHitsV2::GetParam()
733{
734 return (fCurrentHit->fStatus)? (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex):0;
735}