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Density effect added (Yu.Belikov)
[u/mrichter/AliRoot.git] / TPC / AliTPCTrackHits.cxx
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b6895dd8 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
cf98c13f 18///////////////////////////////////////////////////////////////////////////////
19// //
20// Time Projection Chamber track hits object //
21//
22// Origin: Marian Ivanov , GSI Darmstadt
23//
24// Class for storing simulated AliTPCHits for given track //
25// -average compression comparing to classical ClonesArray is //
26// around 5-7 (depending on the required hit precision) //
27// //
28//Begin_Html
29/*
30<img src="gif/AliTPCTrackHits.gif">
31*/
32//End_Html
33// //
34// //
35///////////////////////////////////////////////////////////////////////////////
36
835b3d81 37//#include "TVector3.h"
38//#include "TClonesArray.h"
cf98c13f 39#include "AliTPCTrackHits.h"
40#include "AliTPC.h"
41
835b3d81 42//#include <Riostream.h>
cf98c13f 43
44
45
46ClassImp(AliTPCTrackHits)
47LClassImp(AliTrackHitsInfo)
48LClassImp(AliTrackHitsParam)
49LClassImp(AliHitInfo)
50
51Int_t AliTrackHitsInfo::fgCounter1 =0;
52Int_t AliTrackHitsInfo::fgCounter2 =0;
53Int_t AliTrackHitsParam::fgCounter1 =0;
54Int_t AliTrackHitsParam::fgCounter2 =0;
55Int_t AliHitInfo::fgCounter1 =0;
56Int_t AliHitInfo::fgCounter2 =0;
57Int_t AliTPCTrackHits::fgCounter1 =0;
58Int_t AliTPCTrackHits::fgCounter2 =0;
59const Double_t AliTPCTrackHits::fgkPrecision=1e-6; //precision
60const Double_t AliTPCTrackHits::fgkPrecision2=1e-20; //precision
61
62
63/************************************************************/
64// Interface classes //
65#include "AliTPCTrackHitsInterfaces.h"
66
67
68
69
70struct AliTPCCurrentHit {
982aff31 71 friend class AliTPCTrackHits;
72private:
73 AliTPChit fHit; // - hit in "standard" representation
cf98c13f 74 UInt_t fInfoIndex;// - current info pointer
75 UInt_t fParamIndex;// - current param pointer
76 UInt_t fStackIndex; // - current hit stack index
77 Double_t fR; //current Radius
78 Bool_t fStatus; //current status
79};
80
81
82struct AliTPCTempHitInfo {
982aff31 83 friend class AliTPCTrackHits;
84private:
85 enum { kStackSize = 100};
cf98c13f 86 AliTPCTempHitInfo();
87 void NewParam(Double_t r, Double_t z, Double_t fi, Int_t q);
88 void SetHit(Double_t r, Double_t z, Double_t fi, Int_t q);
89 Double_t * GetPosition(Int_t index){return &fPositionStack[index*3];}
90 void UpdateParam(Double_t maxdelta); //recal
91 void Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
92 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
93 Double_t fSumX4, Int_t n,
94 Double_t &a, Double_t &b, Double_t &c);
95 void Fit(AliTrackHitsParam * param);
835b3d81 96 Double_t fSumDr; //fSumDr
97 Double_t fSumDr2; //fSumDr2
98 Double_t fSumDr3; // fSumDr3
99 Double_t fSumDr4; //fSumDr4
100 Double_t fSumDFi; //fSumDFi
101 Double_t fSumDFiDr; // fSumDFiDr
102 Double_t fSumDFiDr2;//fSumDFiDr2
103 Double_t fSumDZ; //fSumDZ
104 Double_t fSumDZDr; //fSumDZDr
105 Double_t fSumDZDr2; //fSumDZDr2
cf98c13f 106 Double_t fOldR; //previos r
982aff31 107 Double_t fPositionStack[3*kStackSize]; //position stack
108 UInt_t fQStack[kStackSize]; //Q stack
cf98c13f 109 UInt_t fStackIndex; //current stack index
110 UInt_t fInfoIndex; //current track info index
111 UInt_t fParamIndex; //current track parameters index
112 AliTrackHitsInfo * fInfo; //current track info
113 AliTrackHitsParam * fParam; //current track param
114};
115
116
117AliTPCTempHitInfo::AliTPCTempHitInfo()
118{
119 //
120 //set to default value
121 fSumDr=fSumDr2=fSumDr3=fSumDr4=
122 fSumDFi=fSumDFiDr=fSumDFiDr2=
123 fSumDZ=fSumDZDr=fSumDZDr2=0;
124 fStackIndex = 0;
125 fInfoIndex = 0;
126 fParamIndex = 0;
127}
128
129
130void AliTPCTempHitInfo::NewParam(Double_t r, Double_t z, Double_t fi, Int_t q)
131{
132 //
133 //reset stack and sum parameters
134 //store line initial point
135 fSumDr=fSumDr2=fSumDr3=fSumDr4=
136 fSumDFi=fSumDFiDr=fSumDFiDr2=
137 fSumDZ=fSumDZDr=fSumDZDr2=0;
138 fStackIndex=0;
139 fParam->fR = r;
140 fOldR = r;
141 fParam->fZ = z;
142 fParam->fFi = fi;
143 fParam->fAn = 0.;
144 fParam->fAd = 0.;
145 fParam->fTheta =0.;
146 fParam->fThetaD =0.;
147 SetHit(r,z,fi,q);
148}
149
150void AliTPCTempHitInfo::SetHit(Double_t r, Double_t z, Double_t fi, Int_t q)
151{
152 //
153 //add hit to the stack
154 //recalculate new estimete of line parameters
155 Double_t *f = GetPosition(fStackIndex);
156 f[0] = r;
157 f[1] = z;
158 f[2] = fi;
159 fQStack[fStackIndex]=q;
160 if (fStackIndex==0) return;
161 Double_t dr = (r-fParam->fR);
162 if (TMath::Abs(dr)<AliTPCTrackHits::fgkPrecision) dr =AliTPCTrackHits::fgkPrecision;
163 Double_t dfi = fi-fParam->fFi;
164 Double_t dz = z -fParam->fZ;
165 Double_t dr2 =dr*dr;
166 Double_t dr3 =dr2*dr;
167 Double_t dr4 =dr3*dr;
168 fSumDr +=dr;
169 fSumDr2+=dr2;
170 fSumDr3+=dr3;
171 fSumDr4+=dr4;
172 fSumDFi +=dfi;
173 fSumDFiDr+=dfi*dr;
174 fSumDFiDr2+=dfi*dr2;
175 fSumDZ +=dz;
176 fSumDZDr+=dz*dr;
177 fSumDZDr2+=dz*dr2;
178
179 //update fit parameters
180 //
181 Double_t det = fSumDr2*fSumDr4-fSumDr3*fSumDr3;
182 if (TMath::Abs(det)<AliTPCTrackHits::fgkPrecision2) return;
183 if ( ( fStackIndex>1 ) ){
184 fParam->fAn = (fSumDr4*fSumDFiDr-fSumDr3*fSumDFiDr2)/det;
185 fParam->fAd = (fSumDr2*fSumDFiDr2-fSumDr3*fSumDFiDr)/det;
186 }
187 else
188 fParam->fAn = fSumDFiDr/fSumDr2;
189 if ( ( fStackIndex>1 ) ){
190 fParam->fTheta = (fSumDr4*fSumDZDr-fSumDr3*fSumDZDr2)/det;
191 fParam->fThetaD= (fSumDr2*fSumDZDr2-fSumDr3*fSumDZDr)/det;
192 }
193 else
194 fParam->fTheta = fSumDZDr/fSumDr2;
195}
196
197
198void AliTPCTempHitInfo::UpdateParam(Double_t maxdelta)
199{
200 //recalc parameters not fixing origin point
201 if (fStackIndex>5){
202 Double_t a,b,c;
203 a=b=c=0;
204 Fit2(fSumDFi, fSumDFiDr, fSumDFiDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
205 fStackIndex, a,b,c);
206 if (TMath::Abs(a)<maxdelta){
207 fParam->fFi +=a/fParam->fR;
208 fParam->fAn = b;
209 fParam->fAd = c;
210 }
211 Fit2(fSumDZ, fSumDZDr, fSumDZDr2, fSumDr,fSumDr2,fSumDr3,fSumDr4,
212 fStackIndex, a,b,c) ;
213 if (TMath::Abs(a)<maxdelta){
214 fParam->fZ +=a;
215 fParam->fTheta = b;
216 fParam->fThetaD = c;
217 }
218 }
219
220}
221void AliTPCTempHitInfo::Fit2(Double_t fSumY, Double_t fSumYX, Double_t fSumYX2,
222 Double_t fSumX, Double_t fSumX2, Double_t fSumX3,
223 Double_t fSumX4, Int_t n,
224 Double_t &a, Double_t &b, Double_t &c)
225{
226 //fit of second order
227 Double_t det =
228 n* (fSumX2*fSumX4-fSumX3*fSumX3) -
229 fSumX* (fSumX*fSumX4-fSumX3*fSumX2)+
230 fSumX2* (fSumX*fSumX3-fSumX2*fSumX2);
231
232 if (TMath::Abs(det)> AliTPCTrackHits::fgkPrecision) {
233 a =
234 (fSumY * (fSumX2*fSumX4-fSumX3*fSumX3)-
235 fSumX *(fSumYX*fSumX4-fSumYX2*fSumX3)+
236 fSumX2*(fSumYX*fSumX3-fSumYX2*fSumX2))/det;
237 b=
238 (n*(fSumYX*fSumX4-fSumX3*fSumYX2)-
239 fSumY*(fSumX*fSumX4-fSumX3*fSumX2)+
240 fSumX2*(fSumX*fSumYX2-fSumYX*fSumX2))/det;
241 c=
242 (n*(fSumX2*fSumYX2-fSumYX*fSumX3)-
243 fSumX*(fSumX*fSumYX2-fSumYX*fSumX2)+
244 fSumY*(fSumX*fSumX3-fSumX2*fSumX2))/det;
245 }
246}
247
248void AliTPCTempHitInfo::Fit(AliTrackHitsParam * param)
249{
250 // fit fixing first and the last point
251 //result stored in new param
252 Double_t dx2 = (GetPosition(fStackIndex))[0]-fParam->fR;
253 Double_t det = fSumDr4+dx2*fSumDr2-2*dx2*fSumDr3;
254 if ( (TMath::Abs(det)> AliTPCTrackHits::fgkPrecision) &&
255 ((TMath::Abs(dx2)> AliTPCTrackHits::fgkPrecision))){
256 Double_t dfi2 = (GetPosition(fStackIndex))[1]-fParam->fFi;
257 param->fAd = (fSumDFiDr2+dfi2*fSumDr-dx2*fSumDFiDr-dfi2*fSumDr3/dx2)/det;
258 param->fAn = (dfi2-param->fAd*dx2*dx2)/dx2;
259
260 Double_t dz2 = (GetPosition(fStackIndex))[1]-fParam->fZ;
261 param->fTheta = (fSumDZDr2+dz2*fSumDr-dx2*fSumDZDr-dz2*fSumDr3/dx2)/det;
262 param->fTheta = (dz2-param->fAd*dx2*dx2)/dx2;
263 }
264
265}
266
267
268
269
270AliTPCTrackHits::AliTPCTrackHits()
271{
272 //
273 //default constructor
274 //
275 const Float_t kHitPrecision=0.002; //default precision for hit position in cm
276 const Float_t kStep =0.003; //30 mum step
277 const UShort_t kMaxDistance =100; //maximum distance 100
278
279 fPrecision=kHitPrecision; //precision in cm
280 fStep = kStep; //step size
281 fMaxDistance = kMaxDistance; //maximum distance
282 fTempInfo =0;
283 fTrackHitsInfo = new AliObjectArray("AliTrackHitsInfo");
284 fTrackHitsParam = new AliObjectArray("AliTrackHitsParam");
633d3715 285 fHitsPosAndQ = new TArrayOfArrayVStack("AliHitInfo");
cf98c13f 286 fCurrentHit = new AliTPCCurrentHit;
287 fgCounter1++;
288 fgCounter2++;
289
290}
291
835b3d81 292AliTPCTrackHits::AliTPCTrackHits(const AliTPCTrackHits& r) : TObject(r)
293{
294}
295
296
cf98c13f 297AliTPCTrackHits::~AliTPCTrackHits()
298{
299 //
300 //default destructor
301 //
302 if (fTrackHitsInfo) delete fTrackHitsInfo;
303 if (fTrackHitsParam) delete fTrackHitsParam;
304 if (fHitsPosAndQ) delete fHitsPosAndQ;
305 if (fCurrentHit) delete fCurrentHit;
306 if (fTempInfo) delete fTempInfo;
307 fgCounter1--;
308}
309
310void AliTPCTrackHits::Clear()
311{
312 //
313 //clear object
633d3715 314 fTrackHitsInfo->Clear();
315 fTrackHitsParam->Clear();
316 //fTrackHitsInfo->Resize(0);
317 //fTrackHitsParam->Resize(0);
cf98c13f 318 fHitsPosAndQ->Clear();
319
320 if (fTempInfo){
321 delete fTempInfo;
322 fTempInfo =0;
323 }
324}
325
326
327void AliTPCTrackHits::AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x,
328 Double_t y, Double_t z,Int_t q)
329{
835b3d81 330 //add hits (cartesian)
cf98c13f 331 Double_t r = TMath::Sqrt(x*x+y*y);
332 Double_t fi = TMath::ACos(x/r);
333 if (y<0) fi*=-1.;
334 AddHit(volumeID,trackID,r,z,fi,q);
335}
336
337void AliTPCTrackHits::AddHit(Int_t volumeID, Int_t trackID,
338 Double_t r, Double_t z, Double_t fi, Int_t q)
339{
340 //
341 Bool_t diff=kFALSE;
342 if (!fTempInfo) { //initialsation of track
343 fTempInfo = new AliTPCTempHitInfo;
344 //
345 if (fTrackHitsInfo->GetCapacity()<10) fTrackHitsInfo->Reserve(10);
346 fTrackHitsInfo->Resize(1);
347 fTempInfo->fInfoIndex =0;
348 if (fTrackHitsParam->GetCapacity()<100) fTrackHitsParam->Reserve(100);
349 fTrackHitsParam->Resize(1);
350 //
351 fTempInfo->fInfo =
352 (AliTrackHitsInfo*) (fTrackHitsInfo->At(0));
353 fTempInfo->fInfo->fVolumeID = volumeID;
354 fTempInfo->fInfo->fTrackID = trackID;
355 fTempInfo->fInfo->fHitParamIndex =0;
356 fTempInfo->fInfoIndex = 0;
357 //
358 fTempInfo->fParam =
359 (AliTrackHitsParam*) (fTrackHitsParam->At(0));
360 fTempInfo->fParamIndex = 0;
361 fTempInfo->NewParam(r,z,fi,q);
362 return;
363 }
364
365 Int_t size = fHitsPosAndQ->GetSize();
366 if (size>(Int_t)fTempInfo->fParamIndex) {
367 fTempInfo->fParamIndex++;
368 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
369 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
370 fTempInfo->fParam =
371 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
372 fTempInfo->NewParam(r,z,fi,q);
373 return;
374 }
375
376
377 // if new volume or new trackID
378 if ( (volumeID!=fTempInfo->fInfo->fVolumeID) ||
379 (trackID!=fTempInfo->fInfo->fTrackID)){
380 diff=kTRUE;
381
382 FlushHitStack(kTRUE);
383
384 fTempInfo->fInfoIndex++;
385 if (fTempInfo->fInfoIndex+1>fTrackHitsInfo->GetSize())
386 fTrackHitsInfo->Resize(fTempInfo->fInfoIndex+1);
387 fTempInfo->fInfo =
388 (AliTrackHitsInfo*) (fTrackHitsInfo->At(fTempInfo->fInfoIndex));
389 fTempInfo->fInfo->fVolumeID = volumeID;
390 fTempInfo->fInfo->fTrackID = trackID;
391 fTempInfo->fInfo->fHitParamIndex =fTempInfo->fParamIndex+1;
392 // FlushHitStack(kTRUE);
393
394 fTempInfo->fParamIndex++;
395 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
396 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
397 fTempInfo->fParam =
398 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
399 fTempInfo->NewParam(r,z,fi,q);
400 return;
401 }
402
403 //calculate current fit precission to next point
404 AliTrackHitsParam &param = *(fTempInfo->fParam);
405 Double_t dd=0;
406 Double_t dl=0;
407 Double_t ratio=0;
408 Double_t dr,dz,dfi,ddz,ddfi;
409 Double_t drhit,ddl;
410 dr=dz=dfi=ddz=ddfi=0;
411 drhit = r-fTempInfo->fOldR;
412 {
413 //Double_t dfi2 = param.fAn+2*param.fAd*(r-param.fR);
414 Double_t dfi2 = param.fAn;
415 dfi2*=dfi2*fTempInfo->fOldR*fTempInfo->fOldR;
416 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(r-param.fR);
417 Double_t ddz2 = param.fTheta;
418 ddz2*=ddz2;
419 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
420 }
8217f168 421 //
422
423
424 dl = (TMath::Abs(drhit*ratio/fStep)<32000) ? fStep * Short_t(TMath::Nint(drhit*ratio/fStep)):0;
cf98c13f 425 ddl = dl - drhit*ratio;
426 fTempInfo->fOldR += dl/ratio;
427
428 if (fTempInfo->fStackIndex>2){
429 dr = r-param.fR;
430 dz = z-param.fZ;
431 dfi = fi-param.fFi;
432 ddz = dr*param.fTheta+dr*dr*param.fThetaD-dz;
433 ddfi= dr*param.fAn+dr*dr*param.fAd-dfi;
434 dd = TMath::Sqrt(ddz*ddz+r*r*ddfi*ddfi+ddl*ddl);
435 //
436 }
437 //safety factor 1.25
438 if ( ( (dd*1.25>fPrecision) ) ||
982aff31 439 (fTempInfo->fStackIndex+4>fTempInfo->kStackSize) ||
cf98c13f 440 (TMath::Abs(dl/fStep)>fMaxDistance) )
441 diff=kTRUE;
442 else{
443 fTempInfo->fStackIndex++;
444 fTempInfo->SetHit(r,z,fi,q);
445 return;
446 }
447 //if parameter changed
448 if (FlushHitStack(kFALSE)){ //if full buffer flushed
449 fTempInfo->fParamIndex++;
450 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
451 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
452 fTempInfo->fParam =
453 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
454 fTempInfo->NewParam(r,z,fi,q);
455 }
456 else{
457 fTempInfo->fStackIndex++;
458 fTempInfo->SetHit(r,z,fi,q);
459 }
460}
461
462Bool_t AliTPCTrackHits::FlushHitStack(Bool_t force)
463{
464 //
465 //write fHitsPosAndQ information from the stack to te arrays
466 if (!fTempInfo) return kFALSE;
467 Int_t size = fHitsPosAndQ->GetSize();
468
469 if ( (size>0)&&(size!=(Int_t)fTempInfo->fParamIndex)) return kFALSE;
470
471 if (fHitsPosAndQ->Push(fTempInfo->fStackIndex+1)!=fTempInfo->fParamIndex){
472 cout<<"internal error - contact MI\n";
473 return kFALSE;
474 }
475 AliHitInfo * info;
476
477 AliTrackHitsParam & param = *(fTempInfo->fParam);
478 //recalculate track parameter not fixing first point
479 fTempInfo->UpdateParam(fStep/4.);
480 //fTempInfo->Fit(fTempInfo->fParam); //- fixing the first and the last point
481
482 Double_t oldr = param.fR;
483 //cout<<"C3"<<fTempInfo->fStackIndex<<"\n"<<flush;
484 UInt_t i;
485 Double_t dd;
486 for (i=0; i <= fTempInfo->fStackIndex; i++){
487 Double_t * position = fTempInfo->GetPosition(i);
488 Double_t dr = position[0]-oldr;
489 Double_t ratio;
490 {
491 //Double_t dfi2 = param.fAn+2*param.fAd*(position[0]-param.fR);
492 Double_t dfi2 = param.fAn;
493 dfi2*=dfi2*oldr*oldr;
494 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(position[0]-param.fR);
495 Double_t ddz2 = param.fTheta;
496 ddz2*=ddz2;
497 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
498 }
499
8217f168 500 Double_t dl = (TMath::Abs(dr*ratio/fStep)<32000) ? fStep*(Short_t)TMath::Nint(dr*ratio/fStep):0;
cf98c13f 501 dr = dl/ratio;
502 oldr+=dr;
503 //calculate precission
504 AliTrackHitsParam &param = *(fTempInfo->fParam);
505 //real deltas
506 Double_t dr1= position[0]-param.fR;
507 Double_t dz = position[1]-param.fZ;
508
509 Double_t dfi = position[2]-param.fFi;
510 //extrapolated deltas
511 Double_t dr2 = oldr-param.fR;
512 Double_t ddr = dr2-dr1;
513 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
514 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
515 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
516
517 if ( (dd>fPrecision) ){
518 if (i==0){
519 param.fAn = 0;
520 param.fAd = 0;
521 param.fTheta =0;
522 param.fThetaD =0;
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 dl = 0;
526 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
527 }
528 else
529 break;
530 }
531
532 info = (AliHitInfo*)(fHitsPosAndQ->At(fTempInfo->fParamIndex,i));
8217f168 533 info->fHitDistance = (TMath::Abs(dl/fStep)<32000) ?Short_t(TMath::Nint(dl/fStep)):0;
cf98c13f 534 info->fCharge = Short_t(fTempInfo->fQStack[i]);
535 /*
536 cout<<"C2";
537 cout<<" "<<fTempInfo->fStackIndex<<" \t";
538 cout<<" "<<i<<" \t";
539 cout<<position[0]<<"\t";
540 cout<<position[1]<<"\t";
541 cout<<position[2]<<"\t";
542 cout<<param.fAn<<"\t";
543 cout<<param.fTheta<<"\t";
544 cout<<dr1<<"\t"<<ddr<<"\t"<<ddz<<"\t"<<ddfi<<"\t"<<dd<<"\n"<<flush;
545 */
546 }
547
548 if (i<=fTempInfo->fStackIndex){ //if previous iteration not succesfull
549 fHitsPosAndQ->Resize(fTempInfo->fParamIndex,i);
550 //
551 fTempInfo->fParamIndex++;
552 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
553 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
554 fTempInfo->fParam =
555 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
556 Double_t * p = fTempInfo->GetPosition(i);
557 UInt_t index2 = fTempInfo->fStackIndex;
558 fTempInfo->NewParam(p[0],p[1],p[2],fTempInfo->fQStack[i]);
559 if (i+1<=index2) FlushHitStack2(i+1,index2);
560
561 if (force) return FlushHitStack(kTRUE);
562 return kFALSE;
563 }
564 return kTRUE;
565}
566
567
568void AliTPCTrackHits::FlushHitStack2(Int_t index1, Int_t index2)
569{
570 //
571 // second iteration flush stack
572 // call only for hits where first iteration were not succesfully interpolated
573 Double_t * positionstack = new Double_t[3*(index2-index1+1)];
574 UInt_t * qstack = new UInt_t[index2-index1+1];
575 memcpy(positionstack, &fTempInfo->fPositionStack[3*index1],
576 (3*(index2-index1+1))*sizeof(Double_t));
577 memcpy(qstack, &fTempInfo->fQStack[index1],(index2-index1+1)*sizeof(UInt_t));
578 Double_t *p = positionstack;
579 for (Int_t j=0; j<=index2-index1;j++){
580 fTempInfo->fStackIndex++;
581 fTempInfo->SetHit(p[3*j+0],p[3*j+1],p[3*j+2],qstack[j]);
582 }
583 delete []positionstack;
584 delete []qstack;
585}
586
587
588
589
590
591
592
593
594
595Bool_t AliTPCTrackHits::First()
596{
597 //
598 //set Current hit for the first hit
599 //
600 AliTrackHitsInfo *info = (AliTrackHitsInfo *)fTrackHitsInfo->At(0);
601 AliTrackHitsParam *param = (AliTrackHitsParam *)fTrackHitsParam->At(0);
602 AliHitInfo * hinfo = (AliHitInfo *)fHitsPosAndQ->At(0,0);
603
604 if (!(info) || !(param) || !(hinfo) ) {
605 fCurrentHit->fStatus = kFALSE;
606 return kFALSE;
607 }
608
609 fCurrentHit->fInfoIndex = 0;
610 fCurrentHit->fParamIndex = 0;
611 fCurrentHit->fStackIndex = 0;
612
613 fCurrentHit->fHit.fSector = info->fVolumeID;
614 fCurrentHit->fHit.SetTrack(info->fTrackID);
615 fCurrentHit->fHit.SetX(param->fR*TMath::Cos(param->fFi));
616 fCurrentHit->fHit.SetY(param->fR*TMath::Sin(param->fFi));
617 fCurrentHit->fHit.SetZ(param->fZ);
618 fCurrentHit->fHit.fQ = hinfo->fCharge;
619
620 fCurrentHit->fR = param->fR;
621
622 return fCurrentHit->fStatus = kTRUE;
623}
624
25419831 625
626/*
cf98c13f 627Bool_t AliTPCTrackHits::Next()
628{
629 //
630 //
631 if (!(fCurrentHit->fStatus))
632 return kFALSE;
633
634 fCurrentHit->fStackIndex++;
635 AliHitInfo * hinfo = (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex,
636 fCurrentHit->fStackIndex);
637 AliTrackHitsInfo *info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
638 AliTrackHitsParam *param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
639
640 if (!hinfo) {
641 hinfo = (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex+1, 0);
642 if (!hinfo)
643 return fCurrentHit->fStatus = kFALSE;
644 if (hinfo){
645 fCurrentHit->fParamIndex++;
646 fCurrentHit->fStackIndex = 0;
647 param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
648 if (!param)
649 return fCurrentHit->fStatus = kFALSE;
650 fCurrentHit->fR = param->fR;
651
652 if ((fCurrentHit->fInfoIndex+1<fTrackHitsInfo->GetSize())
653 &&((info+1)->fHitParamIndex<=fCurrentHit->fParamIndex)){
654 fCurrentHit->fInfoIndex++;
655 info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
656 if (!info)
657 return fCurrentHit->fStatus = kFALSE;
658 fCurrentHit->fHit.fSector = info->fVolumeID;
659 fCurrentHit->fHit.SetTrack(info->fTrackID);
660 }
661 }
662 }
663 Double_t ratio;
664 {
665 // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
666 Double_t dfi2 = param->fAn;
667 dfi2*=dfi2*fCurrentHit->fR*fCurrentHit->fR;
668 // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
669 Double_t ddz2 = param->fTheta;
670 ddz2*=ddz2;
671 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
672 }
673
674 fCurrentHit->fHit.fQ = hinfo->fCharge;
675 fCurrentHit->fR += fStep*hinfo->fHitDistance/ratio;
676 Double_t dR = fCurrentHit->fR - param->fR;
677 //Double_t dR =0;
678 Double_t fi = param->fFi + (param->fAn*dR+param->fAd*dR*dR);
679 Double_t z = param->fZ + (param->fTheta*dR+param->fThetaD*dR*dR);
680
681 fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
682 fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
683 fCurrentHit->fHit.SetZ(z);
684 return kTRUE;
685}
25419831 686
687*/
835b3d81 688AliTPChit * AliTPCTrackHits::GetHit() const
cf98c13f 689{
690 //
691 return (fCurrentHit->fStatus)? &fCurrentHit->fHit:0;
692 //return &fCurrentHit->fHit;
693
694}
695
25419831 696
697
698Bool_t AliTPCTrackHits::Next(Int_t id)
699{
700 //
701 //
702 if (!(fCurrentHit->fStatus))
703 return kFALSE;
704
705 // fCurrentHit->fStackIndex++;
706 AliHitInfo * hinfo = (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex,
707 fCurrentHit->fStackIndex);
708 AliTrackHitsInfo *info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
709 if (!info) {
710 fCurrentHit->fStatus = kFALSE;
711 return kFALSE;
712 }
713 AliTrackHitsParam *param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
714
715 if ( (id>=0) && (info!=0) && (info->fVolumeID!=id)){
716 fCurrentHit->fInfoIndex++;
717 info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
718 if (!info) {
719 fCurrentHit->fStatus = kFALSE;
720 return kFALSE;
721 }
722 fCurrentHit->fParamIndex = info->fHitParamIndex;
723 param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
724 fCurrentHit->fStackIndex =0;
725 fCurrentHit->fR = param->fR;
726 return Next(id);
727 }
728 if (!info) {
729 fCurrentHit->fStatus = kFALSE;
730 return kFALSE;
731 }
732 if (!hinfo) {
733 hinfo = (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex+1, 0);
734 if (!hinfo){
735 fCurrentHit->fStatus = kFALSE;
736 return kFALSE;
737 }
738 if (hinfo){
739 fCurrentHit->fParamIndex++;
740 fCurrentHit->fStackIndex = 0;
741 param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
742 if (!param){
743 fCurrentHit->fStatus = kFALSE;
744 return kFALSE;
745 }
746 fCurrentHit->fR = param->fR;
747
748 if ((fCurrentHit->fInfoIndex+1<fTrackHitsInfo->GetSize())
749 &&((info+1)->fHitParamIndex<=fCurrentHit->fParamIndex)){
750 fCurrentHit->fInfoIndex++;
751 info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
752 if (!info){
753 fCurrentHit->fStatus = kFALSE;
754 return kFALSE;
755 }
756 if ( (id>=0) && (info!=0) && (info->fVolumeID!=id)){
757 return Next(id);
758 }
759 fCurrentHit->fHit.fSector = info->fVolumeID;
760 fCurrentHit->fHit.SetTrack(info->fTrackID);
761 }
762 }
763 }
764 Double_t ratio;
765 {
766 // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
767 Double_t dfi2 = param->fAn;
768 dfi2*=dfi2*fCurrentHit->fR*fCurrentHit->fR;
769 // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
770 Double_t ddz2 = param->fTheta;
771 ddz2*=ddz2;
772 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
773 }
774
775 fCurrentHit->fHit.fQ = hinfo->fCharge;
776 fCurrentHit->fR += fStep*hinfo->fHitDistance/ratio;
777 Double_t dR = fCurrentHit->fR - param->fR;
778 //Double_t dR =0;
779 Double_t fi = param->fFi + (param->fAn*dR+param->fAd*dR*dR);
780 Double_t z = param->fZ + (param->fTheta*dR+param->fThetaD*dR*dR);
781
782 fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
783 fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
784 fCurrentHit->fHit.SetZ(z);
785 fCurrentHit->fHit.fSector = info->fVolumeID;
786 fCurrentHit->fHit.SetTrack(info->fTrackID);
787 //
788 fCurrentHit->fStatus = kTRUE;
789 fCurrentHit->fStackIndex++;
790 return kTRUE;
791}
792
793
cf98c13f 794AliTrackHitsParam * AliTPCTrackHits::GetParam()
795{
796 //
797 return (fCurrentHit->fStatus)? (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex) :0;
798}
799
800AliHitInfo * AliTPCTrackHits::GetHitInfo()
801{
802 //
803 return (fCurrentHit->fStatus)?
804 (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex,fCurrentHit->fStackIndex) :0;
805}
806
807
808