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Minor corrections after big transformer changes
[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
16/*
2289aadd 17$Log$
633d3715 18Revision 1.3 2000/11/02 10:22:50 kowal2
19Logs added
20
b6895dd8 21*/
cf98c13f 22///////////////////////////////////////////////////////////////////////////////
23// //
24// Time Projection Chamber track hits object //
25//
26// Origin: Marian Ivanov , GSI Darmstadt
27//
28// Class for storing simulated AliTPCHits for given track //
29// -average compression comparing to classical ClonesArray is //
30// around 5-7 (depending on the required hit precision) //
31// //
32//Begin_Html
33/*
34<img src="gif/AliTPCTrackHits.gif">
35*/
36//End_Html
37// //
38// //
39///////////////////////////////////////////////////////////////////////////////
40
41#include "TVector3.h"
42#include "TClonesArray.h"
43#include "AliTPCTrackHits.h"
44#include "AliTPC.h"
45
46#include <iostream.h>
47
48
49
50ClassImp(AliTPCTrackHits)
51LClassImp(AliTrackHitsInfo)
52LClassImp(AliTrackHitsParam)
53LClassImp(AliHitInfo)
54
55Int_t AliTrackHitsInfo::fgCounter1 =0;
56Int_t AliTrackHitsInfo::fgCounter2 =0;
57Int_t AliTrackHitsParam::fgCounter1 =0;
58Int_t AliTrackHitsParam::fgCounter2 =0;
59Int_t AliHitInfo::fgCounter1 =0;
60Int_t AliHitInfo::fgCounter2 =0;
61Int_t AliTPCTrackHits::fgCounter1 =0;
62Int_t AliTPCTrackHits::fgCounter2 =0;
63const Double_t AliTPCTrackHits::fgkPrecision=1e-6; //precision
64const Double_t AliTPCTrackHits::fgkPrecision2=1e-20; //precision
65
66
67/************************************************************/
68// Interface classes //
69#include "AliTPCTrackHitsInterfaces.h"
70
71
72
73
74struct AliTPCCurrentHit {
75 AliTPChit fHit;
76 UInt_t fInfoIndex;// - current info pointer
77 UInt_t fParamIndex;// - current param pointer
78 UInt_t fStackIndex; // - current hit stack index
79 Double_t fR; //current Radius
80 Bool_t fStatus; //current status
81};
82
83
84struct AliTPCTempHitInfo {
85 enum { fkStackSize = 10000};
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);
96 Double_t fSumDr; //
97 Double_t fSumDr2; //
98 Double_t fSumDr3; //
99 Double_t fSumDr4; //
100 Double_t fSumDFi; //
101 Double_t fSumDFiDr; //
102 Double_t fSumDFiDr2;//
103 Double_t fSumDZ; //
104 Double_t fSumDZDr; //
105 Double_t fSumDZDr2; //
106 Double_t fOldR; //previos r
107 Double_t fPositionStack[3*fkStackSize]; //position stack
108 UInt_t fQStack[fkStackSize]; //Q stack
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
292AliTPCTrackHits::~AliTPCTrackHits()
293{
294 //
295 //default destructor
296 //
297 if (fTrackHitsInfo) delete fTrackHitsInfo;
298 if (fTrackHitsParam) delete fTrackHitsParam;
299 if (fHitsPosAndQ) delete fHitsPosAndQ;
300 if (fCurrentHit) delete fCurrentHit;
301 if (fTempInfo) delete fTempInfo;
302 fgCounter1--;
303}
304
305void AliTPCTrackHits::Clear()
306{
307 //
308 //clear object
633d3715 309 fTrackHitsInfo->Clear();
310 fTrackHitsParam->Clear();
311 //fTrackHitsInfo->Resize(0);
312 //fTrackHitsParam->Resize(0);
cf98c13f 313 fHitsPosAndQ->Clear();
314
315 if (fTempInfo){
316 delete fTempInfo;
317 fTempInfo =0;
318 }
319}
320
321
322void AliTPCTrackHits::AddHitKartez(Int_t volumeID, Int_t trackID, Double_t x,
323 Double_t y, Double_t z,Int_t q)
324{
325 Double_t r = TMath::Sqrt(x*x+y*y);
326 Double_t fi = TMath::ACos(x/r);
327 if (y<0) fi*=-1.;
328 AddHit(volumeID,trackID,r,z,fi,q);
329}
330
331void AliTPCTrackHits::AddHit(Int_t volumeID, Int_t trackID,
332 Double_t r, Double_t z, Double_t fi, Int_t q)
333{
334 //
335 Bool_t diff=kFALSE;
336 if (!fTempInfo) { //initialsation of track
337 fTempInfo = new AliTPCTempHitInfo;
338 //
339 if (fTrackHitsInfo->GetCapacity()<10) fTrackHitsInfo->Reserve(10);
340 fTrackHitsInfo->Resize(1);
341 fTempInfo->fInfoIndex =0;
342 if (fTrackHitsParam->GetCapacity()<100) fTrackHitsParam->Reserve(100);
343 fTrackHitsParam->Resize(1);
344 //
345 fTempInfo->fInfo =
346 (AliTrackHitsInfo*) (fTrackHitsInfo->At(0));
347 fTempInfo->fInfo->fVolumeID = volumeID;
348 fTempInfo->fInfo->fTrackID = trackID;
349 fTempInfo->fInfo->fHitParamIndex =0;
350 fTempInfo->fInfoIndex = 0;
351 //
352 fTempInfo->fParam =
353 (AliTrackHitsParam*) (fTrackHitsParam->At(0));
354 fTempInfo->fParamIndex = 0;
355 fTempInfo->NewParam(r,z,fi,q);
356 return;
357 }
358
359 Int_t size = fHitsPosAndQ->GetSize();
360 if (size>(Int_t)fTempInfo->fParamIndex) {
361 fTempInfo->fParamIndex++;
362 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
363 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
364 fTempInfo->fParam =
365 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
366 fTempInfo->NewParam(r,z,fi,q);
367 return;
368 }
369
370
371 // if new volume or new trackID
372 if ( (volumeID!=fTempInfo->fInfo->fVolumeID) ||
373 (trackID!=fTempInfo->fInfo->fTrackID)){
374 diff=kTRUE;
375
376 FlushHitStack(kTRUE);
377
378 fTempInfo->fInfoIndex++;
379 if (fTempInfo->fInfoIndex+1>fTrackHitsInfo->GetSize())
380 fTrackHitsInfo->Resize(fTempInfo->fInfoIndex+1);
381 fTempInfo->fInfo =
382 (AliTrackHitsInfo*) (fTrackHitsInfo->At(fTempInfo->fInfoIndex));
383 fTempInfo->fInfo->fVolumeID = volumeID;
384 fTempInfo->fInfo->fTrackID = trackID;
385 fTempInfo->fInfo->fHitParamIndex =fTempInfo->fParamIndex+1;
386 // FlushHitStack(kTRUE);
387
388 fTempInfo->fParamIndex++;
389 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
390 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
391 fTempInfo->fParam =
392 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
393 fTempInfo->NewParam(r,z,fi,q);
394 return;
395 }
396
397 //calculate current fit precission to next point
398 AliTrackHitsParam &param = *(fTempInfo->fParam);
399 Double_t dd=0;
400 Double_t dl=0;
401 Double_t ratio=0;
402 Double_t dr,dz,dfi,ddz,ddfi;
403 Double_t drhit,ddl;
404 dr=dz=dfi=ddz=ddfi=0;
405 drhit = r-fTempInfo->fOldR;
406 {
407 //Double_t dfi2 = param.fAn+2*param.fAd*(r-param.fR);
408 Double_t dfi2 = param.fAn;
409 dfi2*=dfi2*fTempInfo->fOldR*fTempInfo->fOldR;
410 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(r-param.fR);
411 Double_t ddz2 = param.fTheta;
412 ddz2*=ddz2;
413 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
414 }
415 dl = fStep * Short_t(TMath::Nint(drhit*ratio/fStep));
416 ddl = dl - drhit*ratio;
417 fTempInfo->fOldR += dl/ratio;
418
419 if (fTempInfo->fStackIndex>2){
420 dr = r-param.fR;
421 dz = z-param.fZ;
422 dfi = fi-param.fFi;
423 ddz = dr*param.fTheta+dr*dr*param.fThetaD-dz;
424 ddfi= dr*param.fAn+dr*dr*param.fAd-dfi;
425 dd = TMath::Sqrt(ddz*ddz+r*r*ddfi*ddfi+ddl*ddl);
426 //
427 }
428 //safety factor 1.25
429 if ( ( (dd*1.25>fPrecision) ) ||
430 (fTempInfo->fStackIndex+4>fTempInfo->fkStackSize) ||
431 (TMath::Abs(dl/fStep)>fMaxDistance) )
432 diff=kTRUE;
433 else{
434 fTempInfo->fStackIndex++;
435 fTempInfo->SetHit(r,z,fi,q);
436 return;
437 }
438 //if parameter changed
439 if (FlushHitStack(kFALSE)){ //if full buffer flushed
440 fTempInfo->fParamIndex++;
441 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
442 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
443 fTempInfo->fParam =
444 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
445 fTempInfo->NewParam(r,z,fi,q);
446 }
447 else{
448 fTempInfo->fStackIndex++;
449 fTempInfo->SetHit(r,z,fi,q);
450 }
451}
452
453Bool_t AliTPCTrackHits::FlushHitStack(Bool_t force)
454{
455 //
456 //write fHitsPosAndQ information from the stack to te arrays
457 if (!fTempInfo) return kFALSE;
458 Int_t size = fHitsPosAndQ->GetSize();
459
460 if ( (size>0)&&(size!=(Int_t)fTempInfo->fParamIndex)) return kFALSE;
461
462 if (fHitsPosAndQ->Push(fTempInfo->fStackIndex+1)!=fTempInfo->fParamIndex){
463 cout<<"internal error - contact MI\n";
464 return kFALSE;
465 }
466 AliHitInfo * info;
467
468 AliTrackHitsParam & param = *(fTempInfo->fParam);
469 //recalculate track parameter not fixing first point
470 fTempInfo->UpdateParam(fStep/4.);
471 //fTempInfo->Fit(fTempInfo->fParam); //- fixing the first and the last point
472
473 Double_t oldr = param.fR;
474 //cout<<"C3"<<fTempInfo->fStackIndex<<"\n"<<flush;
475 UInt_t i;
476 Double_t dd;
477 for (i=0; i <= fTempInfo->fStackIndex; i++){
478 Double_t * position = fTempInfo->GetPosition(i);
479 Double_t dr = position[0]-oldr;
480 Double_t ratio;
481 {
482 //Double_t dfi2 = param.fAn+2*param.fAd*(position[0]-param.fR);
483 Double_t dfi2 = param.fAn;
484 dfi2*=dfi2*oldr*oldr;
485 //Double_t ddz2 = param.fTheta+2*param.fThetaD*(position[0]-param.fR);
486 Double_t ddz2 = param.fTheta;
487 ddz2*=ddz2;
488 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
489 }
490
491 Double_t dl = fStep*(Short_t)TMath::Nint(dr*ratio/fStep);
492 dr = dl/ratio;
493 oldr+=dr;
494 //calculate precission
495 AliTrackHitsParam &param = *(fTempInfo->fParam);
496 //real deltas
497 Double_t dr1= position[0]-param.fR;
498 Double_t dz = position[1]-param.fZ;
499
500 Double_t dfi = position[2]-param.fFi;
501 //extrapolated deltas
502 Double_t dr2 = oldr-param.fR;
503 Double_t ddr = dr2-dr1;
504 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
505 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
506 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
507
508 if ( (dd>fPrecision) ){
509 if (i==0){
510 param.fAn = 0;
511 param.fAd = 0;
512 param.fTheta =0;
513 param.fThetaD =0;
514 Double_t ddz = dr2*param.fTheta+dr2*dr2*param.fThetaD-dz;
515 Double_t ddfi= dr2*param.fAn+dr2*dr2*param.fAd-dfi;
516 dl = 0;
517 dd = TMath::Sqrt(ddz*ddz+oldr*oldr*ddfi*ddfi+ddr*ddr);
518 }
519 else
520 break;
521 }
522
523 info = (AliHitInfo*)(fHitsPosAndQ->At(fTempInfo->fParamIndex,i));
524 info->fHitDistance = Short_t(TMath::Nint(dl/fStep));
525 info->fCharge = Short_t(fTempInfo->fQStack[i]);
526 /*
527 cout<<"C2";
528 cout<<" "<<fTempInfo->fStackIndex<<" \t";
529 cout<<" "<<i<<" \t";
530 cout<<position[0]<<"\t";
531 cout<<position[1]<<"\t";
532 cout<<position[2]<<"\t";
533 cout<<param.fAn<<"\t";
534 cout<<param.fTheta<<"\t";
535 cout<<dr1<<"\t"<<ddr<<"\t"<<ddz<<"\t"<<ddfi<<"\t"<<dd<<"\n"<<flush;
536 */
537 }
538
539 if (i<=fTempInfo->fStackIndex){ //if previous iteration not succesfull
540 fHitsPosAndQ->Resize(fTempInfo->fParamIndex,i);
541 //
542 fTempInfo->fParamIndex++;
543 if (fTempInfo->fParamIndex+1>fTrackHitsParam->GetSize())
544 fTrackHitsParam->Resize(fTempInfo->fParamIndex+1);
545 fTempInfo->fParam =
546 (AliTrackHitsParam*) (fTrackHitsParam->At(fTempInfo->fParamIndex));
547 Double_t * p = fTempInfo->GetPosition(i);
548 UInt_t index2 = fTempInfo->fStackIndex;
549 fTempInfo->NewParam(p[0],p[1],p[2],fTempInfo->fQStack[i]);
550 if (i+1<=index2) FlushHitStack2(i+1,index2);
551
552 if (force) return FlushHitStack(kTRUE);
553 return kFALSE;
554 }
555 return kTRUE;
556}
557
558
559void AliTPCTrackHits::FlushHitStack2(Int_t index1, Int_t index2)
560{
561 //
562 // second iteration flush stack
563 // call only for hits where first iteration were not succesfully interpolated
564 Double_t * positionstack = new Double_t[3*(index2-index1+1)];
565 UInt_t * qstack = new UInt_t[index2-index1+1];
566 memcpy(positionstack, &fTempInfo->fPositionStack[3*index1],
567 (3*(index2-index1+1))*sizeof(Double_t));
568 memcpy(qstack, &fTempInfo->fQStack[index1],(index2-index1+1)*sizeof(UInt_t));
569 Double_t *p = positionstack;
570 for (Int_t j=0; j<=index2-index1;j++){
571 fTempInfo->fStackIndex++;
572 fTempInfo->SetHit(p[3*j+0],p[3*j+1],p[3*j+2],qstack[j]);
573 }
574 delete []positionstack;
575 delete []qstack;
576}
577
578
579
580
581
582
583
584
585
586Bool_t AliTPCTrackHits::First()
587{
588 //
589 //set Current hit for the first hit
590 //
591 AliTrackHitsInfo *info = (AliTrackHitsInfo *)fTrackHitsInfo->At(0);
592 AliTrackHitsParam *param = (AliTrackHitsParam *)fTrackHitsParam->At(0);
593 AliHitInfo * hinfo = (AliHitInfo *)fHitsPosAndQ->At(0,0);
594
595 if (!(info) || !(param) || !(hinfo) ) {
596 fCurrentHit->fStatus = kFALSE;
597 return kFALSE;
598 }
599
600 fCurrentHit->fInfoIndex = 0;
601 fCurrentHit->fParamIndex = 0;
602 fCurrentHit->fStackIndex = 0;
603
604 fCurrentHit->fHit.fSector = info->fVolumeID;
605 fCurrentHit->fHit.SetTrack(info->fTrackID);
606 fCurrentHit->fHit.SetX(param->fR*TMath::Cos(param->fFi));
607 fCurrentHit->fHit.SetY(param->fR*TMath::Sin(param->fFi));
608 fCurrentHit->fHit.SetZ(param->fZ);
609 fCurrentHit->fHit.fQ = hinfo->fCharge;
610
611 fCurrentHit->fR = param->fR;
612
613 return fCurrentHit->fStatus = kTRUE;
614}
615
616Bool_t AliTPCTrackHits::Next()
617{
618 //
619 //
620 if (!(fCurrentHit->fStatus))
621 return kFALSE;
622
623 fCurrentHit->fStackIndex++;
624 AliHitInfo * hinfo = (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex,
625 fCurrentHit->fStackIndex);
626 AliTrackHitsInfo *info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
627 AliTrackHitsParam *param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
628
629 if (!hinfo) {
630 hinfo = (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex+1, 0);
631 if (!hinfo)
632 return fCurrentHit->fStatus = kFALSE;
633 if (hinfo){
634 fCurrentHit->fParamIndex++;
635 fCurrentHit->fStackIndex = 0;
636 param = (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex);
637 if (!param)
638 return fCurrentHit->fStatus = kFALSE;
639 fCurrentHit->fR = param->fR;
640
641 if ((fCurrentHit->fInfoIndex+1<fTrackHitsInfo->GetSize())
642 &&((info+1)->fHitParamIndex<=fCurrentHit->fParamIndex)){
643 fCurrentHit->fInfoIndex++;
644 info = (AliTrackHitsInfo *)fTrackHitsInfo->At(fCurrentHit->fInfoIndex);
645 if (!info)
646 return fCurrentHit->fStatus = kFALSE;
647 fCurrentHit->fHit.fSector = info->fVolumeID;
648 fCurrentHit->fHit.SetTrack(info->fTrackID);
649 }
650 }
651 }
652 Double_t ratio;
653 {
654 // Double_t dfi2 = param->fAn+2*param->fAd*(fCurrentHit->fR-param->fR);
655 Double_t dfi2 = param->fAn;
656 dfi2*=dfi2*fCurrentHit->fR*fCurrentHit->fR;
657 // Double_t ddz2 = param->fTheta+2*param->fThetaD*(fCurrentHit->fR-param->fR);
658 Double_t ddz2 = param->fTheta;
659 ddz2*=ddz2;
660 ratio = TMath::Sqrt(1.+ dfi2+ ddz2);
661 }
662
663 fCurrentHit->fHit.fQ = hinfo->fCharge;
664 fCurrentHit->fR += fStep*hinfo->fHitDistance/ratio;
665 Double_t dR = fCurrentHit->fR - param->fR;
666 //Double_t dR =0;
667 Double_t fi = param->fFi + (param->fAn*dR+param->fAd*dR*dR);
668 Double_t z = param->fZ + (param->fTheta*dR+param->fThetaD*dR*dR);
669
670 fCurrentHit->fHit.SetX(fCurrentHit->fR*TMath::Cos(fi));
671 fCurrentHit->fHit.SetY(fCurrentHit->fR*TMath::Sin(fi));
672 fCurrentHit->fHit.SetZ(z);
673 return kTRUE;
674}
675
676AliTPChit * AliTPCTrackHits::GetHit()
677{
678 //
679 return (fCurrentHit->fStatus)? &fCurrentHit->fHit:0;
680 //return &fCurrentHit->fHit;
681
682}
683
684AliTrackHitsParam * AliTPCTrackHits::GetParam()
685{
686 //
687 return (fCurrentHit->fStatus)? (AliTrackHitsParam *)fTrackHitsParam->At(fCurrentHit->fParamIndex) :0;
688}
689
690AliHitInfo * AliTPCTrackHits::GetHitInfo()
691{
692 //
693 return (fCurrentHit->fStatus)?
694 (AliHitInfo *)fHitsPosAndQ->At(fCurrentHit->fParamIndex,fCurrentHit->fStackIndex) :0;
695}
696
697
698