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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///////////////////////////////////////////////////////////////////////////////
54
55//#include "TVector3.h"
56#include "AliTPCTrackHitsV2.h"
57
58#include "TClonesArray.h"
59#include "AliTPC.h"
60
19364939 61#include <Riostream.h>
f641f6bd 62
63
64
65ClassImp(AliTPCTrackHitsV2)
66ClassImp(AliTrackHitsParamV2)
67
68 //
69Int_t AliTrackHitsParamV2::fgCounter1 =0;
70Int_t AliTrackHitsParamV2::fgCounter2 =0;
71//
72Int_t AliTPCTrackHitsV2::fgCounter1 =0;
73Int_t AliTPCTrackHitsV2::fgCounter2 =0;
74//
75const Double_t AliTPCTrackHitsV2::fgkPrecision=1e-6; //precision
76const Double_t AliTPCTrackHitsV2::fgkPrecision2=1e-20; //precision
77
78
79
80
f641f6bd 81struct AliTPCTempHitInfoV2 {
82 enum { fkStackSize = 10000};
83 AliTPCTempHitInfoV2();
84 void NewParam(Double_t r, Double_t z, Double_t fi, Int_t q);
85 void SetHit(Double_t r, Double_t z, Double_t fi, Int_t q);
86 Double_t * GetPosition(Int_t index){return &fPositionStack[index*3];}
87 void UpdateParam(Double_t maxdelta); //recal
88 void Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
89 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
90 Double_t fSumX4, Int_t n,
91 Double_t &a, Double_t &b, Double_t &c);
92 void Fit(AliTrackHitsParamV2 * param);
93 Double_t fSumDr; //
94 Double_t fSumDr2; //
95 Double_t fSumDr3; //
96 Double_t fSumDr4; //
97 Double_t fSumDFi; //
98 Double_t fSumDFiDr; //
99 Double_t fSumDFiDr2;//
100 Double_t fSumDZ; //
101 Double_t fSumDZDr; //
102 Double_t fSumDZDr2; //
103 Double_t fOldR; //previos r
104 Double_t fPositionStack[3*fkStackSize]; //position stack
105 UInt_t fQStack[fkStackSize]; //Q stack
106 UInt_t fStackIndex; //current stack index
107 // UInt_t fInfoIndex; //current track info index
108 UInt_t fParamIndex; //current track parameters index
109 // AliTrackHitsInfo * fInfo; //current track info
110 AliTrackHitsParamV2 * fParam; //current track param
111};
112
113
114AliTPCTempHitInfoV2::AliTPCTempHitInfoV2()
115{
116 //
117 //set to default value
118 fSumDr=fSumDr2=fSumDr3=fSumDr4=
119 fSumDFi=fSumDFiDr=fSumDFiDr2=
120 fSumDZ=fSumDZDr=fSumDZDr2=0;
121 fStackIndex = 0;
122 // fInfoIndex = 0;
123 fParamIndex = 0;
124}
125
126
127void AliTPCTempHitInfoV2::NewParam(Double_t r, Double_t z, Double_t fi, Int_t q)
128{
129 //
130 //reset stack and sum parameters
131 //store line initial point
132 fSumDr=fSumDr2=fSumDr3=fSumDr4=
133 fSumDFi=fSumDFiDr=fSumDFiDr2=
134 fSumDZ=fSumDZDr=fSumDZDr2=0;
135 fStackIndex=0;
136 fParam->fR = r;
137 fOldR = r;
138 fParam->fZ = z;
139 fParam->fFi = fi;
140 fParam->fAn = 0.;
141 fParam->fAd = 0.;
142 fParam->fTheta =0.;
143 fParam->fThetaD =0.;
144 SetHit(r,z,fi,q);
145}
146
147void AliTPCTempHitInfoV2::SetHit(Double_t r, Double_t z, Double_t fi, Int_t q)
148{
149 //
150 //add hit to the stack
151 //recalculate new estimete of line parameters
152 Double_t *f = GetPosition(fStackIndex);
153 f[0] = r;
154 f[1] = z;
155 f[2] = fi;
156 fQStack[fStackIndex]=q;
157 if (fStackIndex==0) return;
158 Double_t dr = (r-fParam->fR);
159 if (TMath::Abs(dr)<AliTPCTrackHitsV2::fgkPrecision) dr =AliTPCTrackHitsV2::fgkPrecision;
160 Double_t dfi = fi-fParam->fFi;
161 Double_t dz = z -fParam->fZ;
162 Double_t dr2 =dr*dr;
163 Double_t dr3 =dr2*dr;
164 Double_t dr4 =dr3*dr;
165 fSumDr +=dr;
166 fSumDr2+=dr2;
167 fSumDr3+=dr3;
168 fSumDr4+=dr4;
169 fSumDFi +=dfi;
170 fSumDFiDr+=dfi*dr;
171 fSumDFiDr2+=dfi*dr2;
172 fSumDZ +=dz;
173 fSumDZDr+=dz*dr;
174 fSumDZDr2+=dz*dr2;
175
176 //update fit parameters
177 //
178 Double_t det = fSumDr2*fSumDr4-fSumDr3*fSumDr3;
179 if (TMath::Abs(det)<AliTPCTrackHitsV2::fgkPrecision2) return;
180 if ( ( fStackIndex>1 ) ){
181 fParam->fAn = (fSumDr4*fSumDFiDr-fSumDr3*fSumDFiDr2)/det;
182 fParam->fAd = (fSumDr2*fSumDFiDr2-fSumDr3*fSumDFiDr)/det;
183 }
184 else
185 fParam->fAn = fSumDFiDr/fSumDr2;
186 if ( ( fStackIndex>1 ) ){
187 fParam->fTheta = (fSumDr4*fSumDZDr-fSumDr3*fSumDZDr2)/det;
188 fParam->fThetaD= (fSumDr2*fSumDZDr2-fSumDr3*fSumDZDr)/det;
189 }
190 else
191 fParam->fTheta = fSumDZDr/fSumDr2;
192}
193
194
195void AliTPCTempHitInfoV2::UpdateParam(Double_t maxdelta)
196{
197 //recalc parameters not fixing origin point
198 if (fStackIndex>5){
199 Double_t a,b,c;
200 a=b=c=0;
201 Fit2(fSumDFi, fSumDFiDr, fSumDFiDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
202 fStackIndex, a,b,c);
203 if (TMath::Abs(a)<maxdelta){
204 fParam->fFi +=a/fParam->fR;
205 fParam->fAn = b;
206 fParam->fAd = c;
207 }
208 Fit2(fSumDZ, fSumDZDr, fSumDZDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
209 fStackIndex, a,b,c) ;
210 if (TMath::Abs(a)<maxdelta){
211 fParam->fZ +=a;
212 fParam->fTheta = b;
213 fParam->fThetaD = c;
214 }
215 }
216
217}
218void AliTPCTempHitInfoV2::Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
219 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
220 Double_t fSumX4, Int_t n,
221 Double_t &a, Double_t &b, Double_t &c)
222{
223 //fit of second order
224 Double_t det =
225 n* (fSumX2*fSumX4-fSumX3*fSumX3) -
226 fSumX* (fSumX*fSumX4-fSumX3*fSumX2)+
227 fSumX2* (fSumX*fSumX3-fSumX2*fSumX2);
228
229 if (TMath::Abs(det)> AliTPCTrackHitsV2::fgkPrecision) {
230 a =
231 (fSumY * (fSumX2*fSumX4-fSumX3*fSumX3)-
232 fSumX *(fSumYX*fSumX4-fSumYX2*fSumX3)+
233 fSumX2*(fSumYX*fSumX3-fSumYX2*fSumX2))/det;
234 b=
235 (n*(fSumYX*fSumX4-fSumX3*fSumYX2)-
236 fSumY*(fSumX*fSumX4-fSumX3*fSumX2)+
237 fSumX2*(fSumX*fSumYX2-fSumYX*fSumX2))/det;
238 c=
239 (n*(fSumX2*fSumYX2-fSumYX*fSumX3)-
240 fSumX*(fSumX*fSumYX2-fSumYX*fSumX2)+
241 fSumY*(fSumX*fSumX3-fSumX2*fSumX2))/det;
242 }
243}
244
245void AliTPCTempHitInfoV2::Fit(AliTrackHitsParamV2 * param)
246{
247 // fit fixing first and the last point
248 //result stored in new param
249 Double_t dx2 = (GetPosition(fStackIndex))[0]-fParam->fR;
250 Double_t det = fSumDr4+dx2*fSumDr2-2*dx2*fSumDr3;
251 if ( (TMath::Abs(det)> AliTPCTrackHitsV2::fgkPrecision) &&
252 ((TMath::Abs(dx2)> AliTPCTrackHitsV2::fgkPrecision))){
253 Double_t dfi2 = (GetPosition(fStackIndex))[1]-fParam->fFi;
254 param->fAd = (fSumDFiDr2+dfi2*fSumDr-dx2*fSumDFiDr-dfi2*fSumDr3/dx2)/det;
255 param->fAn = (dfi2-param->fAd*dx2*dx2)/dx2;
256
257 Double_t dz2 = (GetPosition(fStackIndex))[1]-fParam->fZ;
258 param->fTheta = (fSumDZDr2+dz2*fSumDr-dx2*fSumDZDr-dz2*fSumDr3/dx2)/det;
259 param->fTheta = (dz2-param->fAd*dx2*dx2)/dx2;
260 }
261
262}
263
264AliTrackHitsParamV2::AliTrackHitsParamV2()
265{
266 //default constructor
267 fgCounter1++;
268 fgCounter2++;
269 fHitDistance=0;
270 fCharge=0;
271 fNHits=0;
272}
273AliTrackHitsParamV2::~AliTrackHitsParamV2()
274{
275 fgCounter1--;
276 if (fHitDistance) {
277 delete[]fHitDistance;
278 fHitDistance=0;
279 }
280 if (fCharge){
281 delete[]fCharge;
282 fCharge =0;
283 }
284}
285
286
287AliTPCTrackHitsV2::AliTPCTrackHitsV2()
288{
289 //
290 //default constructor
291 //
292 const Float_t kHitPrecision=0.002; //default precision for hit position in cm
293 const Float_t kStep =0.003; //30 mum step
294 const UShort_t kMaxDistance =100; //maximum distance 100
295
296 fPrecision=kHitPrecision; //precision in cm
297 fStep = kStep; //step size
298 fMaxDistance = kMaxDistance; //maximum distance
299 fTempInfo =0;
300 fSize=0;
301 //fTrackHitsInfo = new AliObjectArray("AliTrackHitsInfo");
302 //fTrackHitsParam = new AliObjectArray("AliTrackHitsParamV2");
303 //fHitsPosAndQ = new TArrayOfArrayVStack("AliHitInfo");
304 fArray = new TClonesArray("AliTrackHitsParamV2");
305 fCurrentHit = new AliTPCCurrentHitV2;
306 fVolumes =0;
307 fNVolumes =0;
fce0283f 308 fHit =0;
f641f6bd 309 fgCounter1++;
310 fgCounter2++;
311
312}
313
314AliTPCTrackHitsV2::~AliTPCTrackHitsV2()
315{
316 //
317 //default destructor
318 //
319 // if (fTrackHitsInfo) delete fTrackHitsInfo;
320 if (fArray) {
321 delete fArray;
322 fArray =0;
323 }
324 //if (fHitsPosAndQ) delete fHitsPosAndQ;
325 if (fCurrentHit) delete fCurrentHit;
326 if (fTempInfo) delete fTempInfo;
327 if (fVolumes) {
328 delete [] fVolumes;
329 fVolumes =0;
330 fNVolumes=0;
331 }
fce0283f 332 if (fHit){
333 delete fHit;
334 fHit=0;
335 }
f641f6bd 336 fgCounter1--;
337}
338
339void AliTPCTrackHitsV2::Clear()
340{
341 //
342 //clear object
6e493dba 343 fSize = 0;
f641f6bd 344 if (fArray){
345 for (Int_t i=0;i<fArray->GetEntriesFast();i++){
346 AliTrackHitsParamV2 * par = (AliTrackHitsParamV2 *)fArray->UncheckedAt(i);
347 par->~AliTrackHitsParamV2(); // delete object
348 }
349 fArray->Clear();
350 }
351 if (fTempInfo){
352 delete fTempInfo;
fce0283f 353 delete fHit;
354 fHit =0;
f641f6bd 355 fTempInfo =0;
356 }
357 if (fVolumes){
358 delete [] fVolumes;
359 fVolumes=0;
360 fNVolumes=0;
361 }
362}
363
364
365void AliTPCTrackHitsV2::AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x,
366 Double_t y, Double_t z,Int_t q)
367{
368 //
369 //add hit to the container - it add hit at the end - input in global coordinata
370 Double_t r = TMath::Sqrt(x*x+y*y);
371 Double_t fi = TMath::ACos(x/r);
372 if (y<0) fi*=-1.;
373 AddHit(volumeID,trackID,r,z,fi,q);
374}
375
376
377void AliTPCTrackHitsV2::AddHit(Int_t volumeID, Int_t trackID,
378 Double_t r, Double_t z, Double_t fi, Int_t q)
379{
380 //
381 fSize++;
382 Bool_t diff=kFALSE;
383 if (!fTempInfo) { //initialisation of track - initialisation of parameters
384 fTempInfo = new AliTPCTempHitInfoV2;
385 fTempInfo->fParam = new((*fArray)[0]) AliTrackHitsParamV2;
386 fTempInfo->fParam->fVolumeID = volumeID;
387 fTempInfo->fParam->fTrackID = trackID;
388 AddVolume(volumeID);
389 //
390 fTempInfo->fParamIndex = 0;
391 fTempInfo->NewParam(r,z,fi,q);
392 return;
393 }
394
395 // if new volume or new trackID
396 if ( (volumeID!=fTempInfo->fParam->fVolumeID) ||
397 (trackID!=fTempInfo->fParam->fTrackID)){
398 if (volumeID!=fTempInfo->fParam->fVolumeID) AddVolume(volumeID);
399 diff=kTRUE;
400 FlushHitStack(kTRUE);
401
402 fTempInfo->fParamIndex++;
403 fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
404 fTempInfo->fParam->fVolumeID = volumeID;
405 fTempInfo->fParam->fTrackID = trackID;
406 fTempInfo->NewParam(r,z,fi,q);
407 return;
408 }
409
410 //calculate current fit precission to next point
411 AliTrackHitsParamV2 &param = *(fTempInfo->fParam);
412 Double_t dd=0;
413 Double_t dl=0;
414 Double_t ratio=0;
415 Double_t dr,dz,dfi,ddz,ddfi;
416 Double_t drhit,ddl;
417 dr=dz=dfi=ddz=ddfi=0;
418 drhit = r-fTempInfo->fOldR;
419 {
420 //Double_t dfi2 = param.fAn+2*param.fAd*(r-param.fR);
421 Double_t dfi2 = param.fAn;
422 dfi2*=dfi2*fTempInfo->fOldR*fTempInfo->fOldR;
423 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(r-param.fR);
424 Double_t ddz2 = param.fTheta;
425 ddz2*=ddz2;
426 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
427 }
c4a237ae 428 //
429 // dl = fStep * Short_t(TMath::Nint(drhit*ratio/fStep)); // MI change - range check
430 dl = drhit*ratio/fStep;
431 if (TMath::Abs(dl)>32765) dl =0;
432 dl = fStep * Short_t(TMath::Nint(dl));
433 //
f641f6bd 434 ddl = dl - drhit*ratio;
435 fTempInfo->fOldR += dl/ratio;
436
437 if (fTempInfo->fStackIndex>2){
438 dr = r-param.fR;
439 dz = z-param.fZ;
440 dfi = fi-param.fFi;
441 ddz = dr*param.fTheta+dr*dr*param.fThetaD-dz;
442 ddfi= dr*param.fAn+dr*dr*param.fAd-dfi;
443 dd = TMath::Sqrt(ddz*ddz+r*r*ddfi*ddfi+ddl*ddl);
444 //
445 }
446 //safety factor 1.25
447 if ( ( (dd*1.25>fPrecision) ) ||
448 (fTempInfo->fStackIndex+4>fTempInfo->fkStackSize) ||
449 (TMath::Abs(dl/fStep)>fMaxDistance) )
450 diff=kTRUE;
451 else{ // if precision OK
452 fTempInfo->fStackIndex++;
453 fTempInfo->SetHit(r,z,fi,q);
454 return;
455 }
456
457
458 //if parameter changed
459 if (FlushHitStack(kFALSE)){ //if full buffer flushed
460 fTempInfo->fParamIndex++;
461 fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
462 fTempInfo->fParam->fVolumeID = volumeID;
463 fTempInfo->fParam->fTrackID = trackID;
464 fTempInfo->NewParam(r,z,fi,q);
465 }
466 else{
467 fTempInfo->fStackIndex++;
468 fTempInfo->SetHit(r,z,fi,q);
469 }
470}
471
472Bool_t AliTPCTrackHitsV2::FlushHitStack(Bool_t force)
473{
474 //
475 //write fHitsPosAndQ information from the stack to te arrays
476 if (!fTempInfo) return kFALSE;
477
478 AliTrackHitsParamV2 & param = *(fTempInfo->fParam);
479 //recalculate track parameter not fixing first point
480 fTempInfo->UpdateParam(fStep/4.);
481 //fTempInfo->Fit(fTempInfo->fParam); //- fixing the first and the last point
482
483 Double_t oldr = param.fR;
484 UInt_t i;
485 Double_t dd;
486 param.fNHits = fTempInfo->fStackIndex+1;
487 if (param.fHitDistance) delete []param.fHitDistance;
488 if (param.fCharge) delete []param.fCharge;
489 param.fHitDistance = new Short_t[param.fNHits];
490 param.fCharge = new Short_t[param.fNHits];
491
492
493 for (i=0; i <= fTempInfo->fStackIndex; i++){
494 Double_t * position = fTempInfo->GetPosition(i);
495 Double_t dr = position[0]-oldr;
496 Double_t ratio;
497 {
498 //Double_t dfi2 = param.fAn+2*param.fAd*(position[0]-param.fR);
499 Double_t dfi2 = param.fAn;
500 dfi2*=dfi2*oldr*oldr;
501 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(position[0]-param.fR);
502 Double_t ddz2 = param.fTheta;
503 ddz2*=ddz2;
504 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
505 }
506
595c3700 507 // Double_t dl = fStep*(Short_t)TMath::Nint(dr*ratio/fStep); //MI change
508 Double_t dl = dr*ratio/fStep;
509 if (TMath::Abs(dl)>32765) dl =0;
510 dl = fStep * Short_t(TMath::Nint(dl));
511
f641f6bd 512 dr = dl/ratio;
513 oldr+=dr;
514 //calculate precission
515 AliTrackHitsParamV2 &param = *(fTempInfo->fParam);
516 //real deltas
517 Double_t dr1= position[0]-param.fR;
518 Double_t dz = position[1]-param.fZ;
519 Double_t dfi = position[2]-param.fFi;
520 //extrapolated deltas
521 Double_t dr2 = oldr-param.fR;
522 Double_t ddr = dr2-dr1;
523 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
524 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
525 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
526
527
528 if ( (dd>fPrecision) ){
529 //if ( (dd<0) ){
530 if (i==0){
531 param.fAn = 0;
532 param.fAd = 0;
533 param.fTheta =0;
534 param.fThetaD =0;
535 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
536 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
537 dl = 0;
538 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
539 }
540 else
541 break;
542 }
543
544 param.fHitDistance[i]= Short_t(TMath::Nint(dl/fStep));
545 param.fCharge[i]= Short_t(fTempInfo->fQStack[i]);
546 }
547
548 if (i<=fTempInfo->fStackIndex){ //if previous iteration not succesfull
549 Short_t * charge = new Short_t[i];
550 Short_t * hitDistance= new Short_t[i];
551 memcpy(charge, param.fCharge,sizeof(Short_t)*i);
552 memcpy(hitDistance, param.fHitDistance,sizeof(Short_t)*i);
553 delete [] param.fCharge;
554 delete [] param.fHitDistance;
555 param.fNHits= i;
556 param.fCharge = charge;
557 param.fHitDistance = hitDistance;
558 //
559 Int_t volumeID = fTempInfo->fParam->fVolumeID;
560 Int_t trackID =fTempInfo->fParam->fTrackID;
561 fTempInfo->fParamIndex++;
562 fTempInfo->fParam = new((*fArray)[fTempInfo->fParamIndex]) AliTrackHitsParamV2;
563 Double_t * p = fTempInfo->GetPosition(i);
564 UInt_t index2 = fTempInfo->fStackIndex;
565 fTempInfo->NewParam(p[0],p[1],p[2],fTempInfo->fQStack[i]);
566 fTempInfo->fParam->fVolumeID= volumeID;
567 fTempInfo->fParam->fTrackID= trackID;
568 if (i+1<=index2) FlushHitStack2(i+1,index2);
569
570 if (force) return FlushHitStack(kTRUE);
571 return kFALSE;
572 }
573 return kTRUE;
574}
575
576
577void AliTPCTrackHitsV2::FlushHitStack2(Int_t index1, Int_t index2)
578{
579 //
580 // second iteration flush stack
581 // call only for hits where first iteration were not succesfully interpolated
582 Double_t * positionstack = new Double_t[3*(index2-index1+1)];
583 UInt_t * qstack = new UInt_t[index2-index1+1];
584 memcpy(positionstack, &fTempInfo->fPositionStack[3*index1],
585 (3*(index2-index1+1))*sizeof(Double_t));
586 memcpy(qstack, &fTempInfo->fQStack[index1],(index2-index1+1)*sizeof(UInt_t));
587 Double_t *p = positionstack;
588 for (Int_t j=0; j<=index2-index1;j++){
589 fTempInfo->fStackIndex++;
590 fTempInfo->SetHit(p[3*j+0],p[3*j+1],p[3*j+2],qstack[j]);
591 }
592 delete []positionstack;
593 delete []qstack;
594}
595
596
597void AliTPCTrackHitsV2::AddVolume(Int_t volume)
598{
599 //
600 //add volumes to tthe list of volumes
601 Int_t * volumes = new Int_t[fNVolumes+1];
f55b9162 602 if (fVolumes) memcpy(volumes,fVolumes,(fNVolumes)*sizeof(Int_t));
f641f6bd 603 volumes[fNVolumes]=volume;
604 fNVolumes++;
605 if (fVolumes) delete []fVolumes;
606 fVolumes = volumes;
607}
608
609
610
611
612
613Bool_t AliTPCTrackHitsV2::First()
614{
615 //
616 //set Current hit for the first hit
617 //
6e493dba 618
619 if (fArray->GetSize()<=0) {
620 fCurrentHit->fStatus = kFALSE;
621 return kFALSE;
622 }
623
f641f6bd 624 AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(0);
fce0283f 625 if (!fHit) fHit = new AliTPChit;
f641f6bd 626 if (!(param) ) {
627 fCurrentHit->fStatus = kFALSE;
628 return kFALSE;
629 }
630 //
631 fCurrentHit->fParamIndex = 0;
632 fCurrentHit->fStackIndex = 0;
633 //
fce0283f 634 //
635 ((AliTPChit*)fHit)->fSector = param->fVolumeID;
636 ((AliTPChit*)fHit)->SetTrack(param->fTrackID);
637 ((AliTPChit*)fHit)->SetX(param->fR*TMath::Cos(param->fFi));
638 ((AliTPChit*)fHit)->SetY(param->fR*TMath::Sin(param->fFi));
639 ((AliTPChit*)fHit)->SetZ(param->fZ);
640 ((AliTPChit*)fHit)->fQ = param->fCharge[0];
641 /*
642 fCurrentHit->fHit.fSector = param->fVolumeID;
643 fCurrentHit->fHit.SetTrack(param->fTrackID);
644 fCurrentHit->fHit.SetX(param->fR*TMath::Cos(param->fFi));
645 fCurrentHit->fHit.SetY(param->fR*TMath::Sin(param->fFi));
646 fCurrentHit->fHit.SetZ(param->fZ);
647 fCurrentHit->fHit.fQ = param->fCharge[0];
648 */
f641f6bd 649 fCurrentHit->fR = param->fR;
650
651 return fCurrentHit->fStatus = kTRUE;
652}
653
654Bool_t AliTPCTrackHitsV2::Next()
655{
656 //
657 //
658 if (!(fCurrentHit->fStatus))
659 return kFALSE;
660
661 fCurrentHit->fStackIndex++;
662
663 AliTrackHitsParamV2 *param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex);
664 if (fCurrentHit->fStackIndex>=param->fNHits){
665 fCurrentHit->fParamIndex++;
666 if (fCurrentHit->fParamIndex>=fArray->GetEntriesFast()){
667 fCurrentHit->fStatus=kFALSE;
668 return kFALSE;
669 }
670 param = (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex);
671 fCurrentHit->fStackIndex=0;
672 fCurrentHit->fR = param->fR;
673 }
674
675
676
677 Double_t ratio;
678 {
679 // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
680 Double_t dfi2 = param->fAn;
681 dfi2*=dfi2*fCurrentHit->fR*fCurrentHit->fR;
682 // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
683 Double_t ddz2 = param->fTheta;
684 ddz2*=ddz2;
685 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
686 }
687
688 fCurrentHit->fR += fStep*param->fHitDistance[fCurrentHit->fStackIndex]/ratio;
689
690 Double_t dR = fCurrentHit->fR - param->fR;
691 Double_t fi = param->fFi + (param->fAn*dR+param->fAd*dR*dR);
692 Double_t z = param->fZ + (param->fTheta*dR+param->fThetaD*dR*dR);
fce0283f 693 /*
f641f6bd 694 fCurrentHit->fHit.fQ = param->fCharge[fCurrentHit->fStackIndex];
695 fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
696 fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
697 fCurrentHit->fHit.SetZ(z);
698 fCurrentHit->fHit.fSector = param->fVolumeID;
699 fCurrentHit->fHit.SetTrack(param->fTrackID);
fce0283f 700 */
701 ((AliTPChit*)fHit)->fQ = param->fCharge[fCurrentHit->fStackIndex];
702 ((AliTPChit*)fHit)->SetX(fCurrentHit->fR*TMath::Cos(fi));
703 ((AliTPChit*)fHit)->SetY(fCurrentHit->fR*TMath::Sin(fi));
704 ((AliTPChit*)fHit)->SetZ(z);
705 ((AliTPChit*)fHit)->fSector = param->fVolumeID;
706 ((AliTPChit*)fHit)->SetTrack(param->fTrackID);
707
f641f6bd 708 return kTRUE;
709}
710
fce0283f 711AliHit * AliTPCTrackHitsV2::GetHit()
f641f6bd 712{
713 //
fce0283f 714 return (fCurrentHit->fStatus)? fHit:0;
f641f6bd 715 //return &fCurrentHit->fHit;
716
717}
718
719AliTrackHitsParamV2 * AliTPCTrackHitsV2::GetParam()
720{
721 return (fCurrentHit->fStatus)? (AliTrackHitsParamV2 *)fArray->At(fCurrentHit->fParamIndex):0;
722}