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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/* $Id$ */
17
18//_________________________________________________________________________
19// Implementation version 1 of algorithm class to construct PHOS track segments
20// Associates EMC and PPSD clusters
21// Unfolds the EMC cluster
22//
23//*-- Author: Dmitri Peressounko (RRC Ki & SUBATECH)
24//
25
26// --- ROOT system ---
27
28#include "TObjArray.h"
29#include "TClonesArray.h"
30#include "TObjectTable.h"
31
32// --- Standard library ---
33
34#include <iostream.h>
35
36// --- AliRoot header files ---
37
38#include "AliPHOSTrackSegmentMakerv1.h"
39#include "AliPHOSIndexToObject.h"
40#include "AliPHOSTrackSegment.h"
41#include "AliPHOSLink.h"
42#include "AliPHOSv0.h"
43#include "AliRun.h"
44
45extern void UnfoldingChiSquare(Int_t &nPar, Double_t *Grad, Double_t & fret, Double_t *x, Int_t iflag) ;
46
47ClassImp( AliPHOSTrackSegmentMakerv1)
48
49
50//____________________________________________________________________________
51 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1() : AliPHOSTrackSegmentMaker()
52{
53 // ctor
54
55 fR0 = 10. ;
56 //clusters are sorted in "rows" and "columns" of width geom->GetCrystalSize(0),
57 fDelta = fR0 + fGeom->GetCrystalSize(0) ;
58 if(!gMinuit) gMinuit = new TMinuit(100) ;
59 fUnfoldFlag = kTRUE ;
60}
61
62//____________________________________________________________________________
63 AliPHOSTrackSegmentMakerv1::~AliPHOSTrackSegmentMakerv1()
64{
65 // dtor
66
67 delete gMinuit ;
68 gMinuit = 0 ;
69}
70
71//____________________________________________________________________________
72Bool_t AliPHOSTrackSegmentMakerv1::FindFit(AliPHOSEmcRecPoint * emcRP, int * maxAt, Float_t * maxAtEnergy,
73 Int_t nPar, Float_t * fitparameters)
74{
75 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
76
77 gMinuit->SetPrintLevel(-1) ; // No Printout
78 gMinuit->SetFCN(UnfoldingChiSquare) ; // To set the address of the minimization function
79 gMinuit->SetObjectFit(emcRP) ; // To tranfer pointer to UnfoldingChiSquare
80
81 // filling initial values for fit parameters
82 AliPHOSDigit * digit ;
83
84 Int_t ierflg = 0;
85 Int_t index = 0 ;
86 Int_t nDigits = (Int_t) nPar / 3 ;
87
88 Int_t iDigit ;
89
90
91 for(iDigit = 0; iDigit < nDigits; iDigit++){
92 digit = (AliPHOSDigit *) maxAt[iDigit];
93
94 Int_t relid[4] ;
95 Float_t x ;
96 Float_t z ;
97 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
98 fGeom->RelPosInModule(relid, x, z) ;
99
100 Float_t energy = maxAtEnergy[iDigit] ;
101
102 gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ;
103 index++ ;
104 if(ierflg != 0){
105 cout << "PHOS Unfolding> Unable to set initial value for fit procedure : x = " << x << endl ;
106 return kFALSE;
107 }
108 gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ;
109 index++ ;
110 if(ierflg != 0){
111 cout << "PHOS Unfolding> Unable to set initial value for fit procedure : z = " << z << endl ;
112 return kFALSE;
113 }
114 gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;
115 index++ ;
116 if(ierflg != 0){
117 cout << "PHOS Unfolding> Unable to set initial value for fit procedure : energy = " << energy << endl ;
118 return kFALSE;
119 }
120 }
121
122 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ; The number of function call slightly
123 // depends on it.
124 Double_t p1 = 1.0 ;
125 Double_t p2 = 0.0 ;
126
127 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TMinuit to reduce function calls
128 gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
129 gMinuit->SetMaxIterations(5);
130 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
131
132 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
133
134 if(ierflg == 4){ // Minimum not found
135 cout << "PHOS Unfolding> Fit not converged, cluster abandoned "<< endl ;
136 return kFALSE ;
137 }
138 for(index = 0; index < nPar; index++){
139 Double_t err ;
140 Double_t val ;
141 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
142 fitparameters[index] = val ;
143 }
144
145 return kTRUE;
146
147}
148
149//____________________________________________________________________________
150void AliPHOSTrackSegmentMakerv1::FillOneModule(AliPHOSRecPoint::RecPointsList * emcIn,
151 TArrayI * emcOut,
152 AliPHOSRecPoint::RecPointsList * ppsdIn,
153 TArrayI * ppsdOutUp,
154 TArrayI * ppsdOutLow,
155 Int_t & phosmod,
156 Int_t & emcStopedAt,
157 Int_t & ppsdStopedAt)
158{
159 // Fill xxxOut arrays with clusters from one PHOS module
160
161 AliPHOSEmcRecPoint * emcRecPoint ;
162 AliPHOSPpsdRecPoint * ppsdRecPoint ;
163 Int_t index ;
164
165 Int_t nEmcUnfolded = emcIn->GetEntries() ;
166 emcOut->Set(nEmcUnfolded);
167 Int_t inEmcOut = 0 ;
168 for(index = emcStopedAt; index < nEmcUnfolded; index++){
169
170 emcRecPoint = (AliPHOSEmcRecPoint *) emcIn->At(index) ;
171
172 if(emcRecPoint->GetPHOSMod() != phosmod )
173 break ;
174
175 emcOut->AddAt(emcRecPoint->GetIndexInList(),inEmcOut) ;
176 inEmcOut++ ;
177 }
178 emcOut->Set(inEmcOut) ;
179
180 emcStopedAt = index ;
181
182 ppsdOutLow->Set(ppsdIn->GetEntries()) ;
183 ppsdOutUp->Set(ppsdIn->GetEntries()) ;
184 Int_t inPpsdLow = 0;
185 Int_t inPpsdUp = 0;
186 for(index = ppsdStopedAt; index < ppsdIn->GetEntries(); index++){
187 ppsdRecPoint = (AliPHOSPpsdRecPoint *) ppsdIn->At(index) ;
188 if(ppsdRecPoint->GetPHOSMod() != phosmod )
189 break ;
190 if(ppsdRecPoint->GetUp() )
191 ppsdOutUp->AddAt(index,inPpsdUp++) ;
192 else
193 ppsdOutLow->AddAt(index,inPpsdLow++) ;
194 }
195 ppsdOutLow->Set(inPpsdLow);
196 ppsdOutUp->Set(inPpsdUp);
197 ppsdStopedAt = index ;
198
199}
200//____________________________________________________________________________
201Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcclu,AliPHOSPpsdRecPoint * PpsdClu, Bool_t &toofar)
202{
203 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
204
205 Float_t r = fR0 ;
206
207 TVector3 vecEmc ;
208 TVector3 vecPpsd ;
209
210 emcclu->GetLocalPosition(vecEmc) ;
211 PpsdClu->GetLocalPosition(vecPpsd) ;
212 if(emcclu->GetPHOSMod() == PpsdClu->GetPHOSMod()){
213 // if(vecPpsd.X() >= vecEmc.X() - fDelta ){
214 // if(vecPpsd.Z() >= vecEmc.Z() - fDelta ){
215 // Correct to difference in CPV and EMC position due to different distance to center.
216 // we assume, that particle moves from center
217 Float_t dCPV = fGeom->GetIPtoOuterCoverDistance();
218 Float_t dEMC = fGeom->GetIPtoCrystalSurface() ;
219 dEMC = dEMC / dCPV ;
220 vecPpsd = dEMC * vecPpsd - vecEmc ;
221 r = vecPpsd.Mag() ;
222 // } // if zPpsd >= zEmc - fDelta
223 toofar = kFALSE ;
224 //} // if xPpsd >= xEmc - fDelta
225 // else
226 //toofar = kTRUE ;
227 }
228 else
229 toofar = kTRUE ;
230
231 //toofar = kFALSE ;
232
233
234 return r ;
235}
236
237//____________________________________________________________________________
238void AliPHOSTrackSegmentMakerv1::MakeLinks(TArrayI * emcRecPoints, TArrayI * ppsdRecPointsUp,
239 TArrayI * ppsdRecPointsLow, TClonesArray * linklowArray,
240 TClonesArray *linkupArray)
241{
242 // Finds distances (links) between all EMC and PPSD clusters, which are not further apart from each other than fR0
243
244
245 AliPHOSPpsdRecPoint * ppsdlow ;
246 AliPHOSPpsdRecPoint * ppsdup ;
247 AliPHOSEmcRecPoint * emcclu ;
248
249 Int_t iLinkLow = 0 ;
250 Int_t iLinkUp = 0 ;
251
252 Int_t iEmcRP;
253
254 for(iEmcRP = 0; iEmcRP < emcRecPoints->GetSize(); iEmcRP++ ) {
255 emcclu = (AliPHOSEmcRecPoint *) fPlease->GimeRecPoint(emcRecPoints->At(iEmcRP),"emc") ;
256 Bool_t toofar ;
257
258 Int_t iPpsdLow ;
259
260 for(iPpsdLow = 0; iPpsdLow < ppsdRecPointsLow->GetSize();iPpsdLow++ ) {
261
262 ppsdlow = (AliPHOSPpsdRecPoint *) fPlease->GimeRecPoint(ppsdRecPointsLow->At(iPpsdLow),"ppsd") ;
263 Float_t r = GetDistanceInPHOSPlane(emcclu, ppsdlow, toofar) ;
264
265 if(toofar)
266 break ;
267 if(r < fR0){
268 new( (*linklowArray)[iLinkLow++]) AliPHOSLink(r, iEmcRP, iPpsdLow) ;
269 }
270 }
271
272 Int_t iPpsdUp = 0 ;
273 for(iPpsdUp = 0; iPpsdUp < ppsdRecPointsUp->GetSize();iPpsdUp++ ) {
274
275 ppsdup = (AliPHOSPpsdRecPoint *)fPlease->GimeRecPoint(ppsdRecPointsUp->At(iPpsdUp),"ppsd") ;
276 Float_t r = GetDistanceInPHOSPlane(emcclu, ppsdup, toofar) ;
277
278 if(toofar)
279 break ;
280 if(r < fR0) {
281 new( (*linkupArray)[iLinkUp++]) AliPHOSLink(r, iEmcRP, iPpsdUp) ;
282 }
283 }
284 }
285
286 linklowArray->Sort() ; //first links with smallest distances
287 linkupArray->Sort() ;
288}
289
290//____________________________________________________________________________
291void AliPHOSTrackSegmentMakerv1::MakePairs(TArrayI * emcRecPoints,
292 TArrayI * ppsdRecPointsUp,
293 TArrayI * ppsdRecPointsLow,
294 TClonesArray * linklowArray,
295 TClonesArray * linkupArray,
296 AliPHOSTrackSegment::TrackSegmentsList * trsl)
297{
298
299 // Finds the smallest links and makes pairs of PPSD and EMC clusters with smallest distance
300
301 TIter nextLow(linklowArray) ;
302 TIter nextUp(linkupArray) ;
303
304 AliPHOSLink * linkLow ;
305 AliPHOSLink * linkUp ;
306
307 Int_t emc ;
308 Int_t ppsdLow ;
309 Int_t ppsdUp ;
310
311 AliPHOSPpsdRecPoint * nullpointer = 0 ;
312 ppsdUp = 0 ;
313
314 while ( (linkLow = (AliPHOSLink *)nextLow() ) ){
315
316 emc = emcRecPoints->At(linkLow->GetEmc()) ;
317 ppsdLow = ppsdRecPointsLow->At(linkLow->GetPpsd()) ;
318
319 if( (emc >= 0) && (ppsdLow >= 0) ){ // RecPoints not removed yet
320
321 new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment((AliPHOSEmcRecPoint *)fPlease->GimeRecPoint(emc,"emc"),
322 nullpointer,
323 (AliPHOSPpsdRecPoint *)fPlease->GimeRecPoint(ppsdLow,"ppsd") ) ;
324 ((AliPHOSTrackSegment* )trsl->At(fNTrackSegments))->SetIndexInList(fNTrackSegments);
325 //replace index of emc to negative and shifted index of TS
326 emcRecPoints->AddAt(-2 - fNTrackSegments,linkLow->GetEmc()) ;
327 //replace index of PPSD Low to negative and shifted index of TS
328 ppsdRecPointsLow->AddAt(-2 - fNTrackSegments,linkLow->GetPpsd()) ;
329 fNTrackSegments++ ;
330
331 }
332 }
333
334 while ( (linkUp = (AliPHOSLink *)nextUp() ) ){
335 emc = emcRecPoints->At(linkUp->GetEmc()) ;
336 if(emc != -1){ //without ppsd Up yet
337
338 ppsdUp = ppsdRecPointsUp->At(linkUp->GetPpsd()) ;
339 if(ppsdUp >= 0){ //ppsdUp still exist
340
341 if(emc >= 0){ //without ppsd Low => create new TS
342
343 fNTrackSegments = trsl->GetEntries() ;
344 new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment((AliPHOSEmcRecPoint *) fPlease->GimeRecPoint(emc,"emc"),
345 (AliPHOSPpsdRecPoint *)fPlease->GimeRecPoint(ppsdUp,"ppsd"),
346 nullpointer) ;
347 ((AliPHOSTrackSegment *) trsl->At(fNTrackSegments))->SetIndexInList(fNTrackSegments);
348 fNTrackSegments++ ;
349 }
350 else{ // append ppsd Up to existing TS
351 ((AliPHOSTrackSegment *)trsl->At(-2-emc))->SetPpsdUpRecPoint((AliPHOSPpsdRecPoint *)fPlease->GimeRecPoint(ppsdUp,"ppsd"));
352 }
353
354 emcRecPoints->AddAt(-1,linkUp->GetEmc()) ; //Mark that PPSD Up found
355 //replace index of PPSD Up to negative and shifted index of TS
356 ppsdRecPointsUp->AddAt(-2 - fNTrackSegments,linkUp->GetPpsd()) ;
357 } //if ppsdUp still exist
358 }
359 }
360
361 Int_t iEmcRP ;
362 for(iEmcRP = 0; iEmcRP <emcRecPoints->GetSize() ; iEmcRP++ ){
363 emc = emcRecPoints->At(iEmcRP) ;
364 if(emc >=0 ){
365 ppsdUp = 0;
366 ppsdLow = 0;
367 new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment((AliPHOSEmcRecPoint *) fPlease->GimeRecPoint(emc,"emc"),
368 nullpointer, nullpointer ) ;
369 ((AliPHOSTrackSegment *) trsl->At(fNTrackSegments))->SetIndexInList(fNTrackSegments);
370 fNTrackSegments++;
371 }
372
373 }
374
375}
376
377//____________________________________________________________________________
378void AliPHOSTrackSegmentMakerv1::MakeTrackSegments(DigitsList * dl,
379 AliPHOSRecPoint::RecPointsList * emcl,
380 AliPHOSRecPoint::RecPointsList * ppsdl,
381 AliPHOSRecPoint::RecPointsList * cpvl,
382 AliPHOSTrackSegment::TrackSegmentsList * trsl)
383{
384 // Makes the track segments out of the list of EMC and PPSD Recpoints and stores them in a list
385
386 Int_t emcStopedAt = 0 ;
387 Int_t ppsdStopedAt = 0 ;
388
389 fNTrackSegments = 0 ;
390
391 TArrayI * emcRecPoints = new TArrayI(1000) ; // these arrays keep indexes
392 TArrayI * ppsdRecPointsUp = new TArrayI(1000) ; // of RecPoints, which are
393 TArrayI * ppsdRecPointsLow = new TArrayI(1000) ; // kept in TClonesArray's emcl, ppsdl, cpv
394
395 TClonesArray * linklowArray = new TClonesArray("AliPHOSLink", 1000);
396 TClonesArray * linkupArray = new TClonesArray("AliPHOSLink", 1000);
397
398 if(fUnfoldFlag){
399 UnfoldAll(dl, emcl) ; // Unfolds all EMC clusters
400 UnfoldAll(dl, cpvl) ; // Unfolds all CPV clusters
401 }
402
403 Int_t phosmod = fGeom->GetNCPVModules() + 1 ;
404 while(phosmod <= fGeom->GetNModules() ){
405
406 FillOneModule(emcl, emcRecPoints, ppsdl, ppsdRecPointsUp, ppsdRecPointsLow, phosmod, emcStopedAt, ppsdStopedAt) ;
407
408 MakeLinks(emcRecPoints, ppsdRecPointsUp, ppsdRecPointsLow, linklowArray, linkupArray) ;
409
410 MakePairs(emcRecPoints, ppsdRecPointsUp, ppsdRecPointsLow, linklowArray, linkupArray, trsl) ;
411
412 emcRecPoints->Reset() ;
413
414 ppsdRecPointsUp->Reset() ;
415
416 ppsdRecPointsLow->Reset() ;
417
418 linkupArray->Clear() ;
419
420 linklowArray->Clear() ;
421
422 phosmod++ ;
423 }
424
425 delete emcRecPoints ;
426 emcRecPoints = 0 ;
427
428 delete ppsdRecPointsUp ;
429 ppsdRecPointsUp = 0 ;
430
431 delete ppsdRecPointsLow ;
432 ppsdRecPointsLow = 0 ;
433
434 delete linkupArray ;
435 linkupArray = 0 ;
436
437 delete linklowArray ;
438 linklowArray = 0 ;
439}
440
441//____________________________________________________________________________
442void AliPHOSTrackSegmentMakerv1::MakeTrackSegmentsCPV(DigitsList * dl,
443 AliPHOSRecPoint::RecPointsList * emcl,
444 AliPHOSRecPoint::RecPointsList * cpvl)
445{
446 // Unfold clusters in EMC and CPV and refill reconstructed point lists emcl and ppsdl
447 // Yuri Kharlov. 19 October 2000
448
449 fNTrackSegments = 0 ;
450
451 TArrayI * emcRecPoints = new TArrayI(1000) ; // these arrays keep indexes
452 TArrayI * cpvRecPoints = new TArrayI(1000) ; // of RecPoints, which are kept in emcl and ppsdl
453
454 if(fUnfoldFlag){
455 UnfoldAll(dl, emcl) ; // Unfolds all EMC clusters
456 UnfoldAll(dl, cpvl) ; // Unfolds all CPV clusters
457 }
458
459// Int_t phosmod = 1 ;
460// Int_t emcStopedAt = 0 ;
461// Int_t cpvStopedAt = 0 ;
462// while(phosmod <= fGeom->GetNModules() ){
463// FillOneModule(emcl, emcRecPoints, ppsdl, cpvRecPoints, phosmod, emcStopedAt, cpvStopedAt) ;
464// emcRecPoints->Reset() ;
465// cpvRecPoints->Reset() ;
466// phosmod++ ;
467// }
468
469 delete emcRecPoints ; emcRecPoints = 0 ;
470 delete cpvRecPoints ; cpvRecPoints = 0 ;
471}
472
473//____________________________________________________________________________
474Double_t AliPHOSTrackSegmentMakerv1::ShowerShape(Double_t r)
475{
476 // Shape of the shower (see PHOS TDR)
477 // If you change this function, change also the gradien evaluation in ChiSquare()
478
479 Double_t r4 = r*r*r*r ;
480 Double_t r295 = TMath::Power(r, 2.95) ;
481 Double_t shape = TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ;
482 return shape ;
483}
484
485//____________________________________________________________________________
486void AliPHOSTrackSegmentMakerv1::UnfoldAll(DigitsList * dl, AliPHOSRecPoint::RecPointsList * emcIn)
487{
488 // Performs unfolding of all EMC clusters, sorts them and resets indexes in RecPoints
489
490 AliPHOSEmcRecPoint * emcRecPoint ;
491 Int_t index ;
492 Int_t nEmcUnfolded = emcIn->GetEntries() ;
493
494 for(index = 0 ; index < nEmcUnfolded; index++){
495
496 emcRecPoint = (AliPHOSEmcRecPoint *) emcIn->At(index) ;
497
498 Int_t nMultipl = emcRecPoint->GetMultiplicity() ;
499 Int_t * maxAt = new Int_t[nMultipl] ;
500 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
501 Int_t nMax = emcRecPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy) ;
502
503 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
504 UnfoldClusters(dl, emcIn, emcRecPoint, nMax, maxAt, maxAtEnergy) ;
505 emcIn->Remove(emcRecPoint);
506 emcIn->Compress() ;
507 index-- ;
508 nEmcUnfolded-- ;
509 }
510
511 delete[] maxAt ;
512 delete[] maxAtEnergy ;
513 } //Unfolding finished
514
515 emcIn->Sort() ;
516
517 // to set index to new and correct index of old RecPoints
518 for( index = 0 ; index < emcIn->GetEntries() ; index++){
519
520 ((AliPHOSEmcRecPoint *) emcIn->At(index))->SetIndexInList(index) ;
521
522 }
523
524 emcIn->Sort() ;
525
526}
527//____________________________________________________________________________
528void AliPHOSTrackSegmentMakerv1::UnfoldClusters(DigitsList * dl,
529 AliPHOSRecPoint::RecPointsList * emcIn,
530 AliPHOSEmcRecPoint * iniEmc,
531 Int_t nMax,
532 int * maxAt,
533 Float_t * maxAtEnergy)
534{
535 // Performs the unfolding of a cluster with nMax overlapping showers
536 // This is time consuming (use the (Un)SetUnfolFlag() )
537
538 Int_t nPar = 3 * nMax ;
539 Float_t * fitparameters = new Float_t[nPar] ;
540
541
542 Bool_t rv = FindFit(iniEmc, maxAt, maxAtEnergy, nPar, fitparameters) ;
543 if( !rv ) {
544 // Fit failed, return and remove cluster
545 delete[] fitparameters ;
546 return ;
547 }
548
549 Float_t xDigit ;
550 Float_t zDigit ;
551 Int_t relid[4] ;
552
553 Int_t nDigits = iniEmc->GetMultiplicity() ;
554 Float_t xpar ;
555 Float_t zpar ;
556 Float_t epar ;
557 Float_t distance ;
558 Float_t ratio ;
559 Float_t * efit = new Float_t[nDigits] ;
560 Int_t iparam ;
561 Int_t iDigit ;
562
563 AliPHOSDigit * digit ;
564 AliPHOSEmcRecPoint * emcRP ;
565 Int_t * emcDigits = iniEmc->GetDigitsList() ;
566 Float_t * emcEnergies = iniEmc->GetEnergiesList() ;
567
568 Int_t iRecPoint = emcIn->GetEntries() ;
569
570 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
571 digit = fPlease->GimeDigit( emcDigits[iDigit] ) ;
572 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
573 fGeom->RelPosInModule(relid, xDigit, zDigit) ;
574 efit[iDigit] = 0;
575 iparam = 0 ;
576
577 while(iparam < nPar ){
578 xpar = fitparameters[iparam] ;
579 zpar = fitparameters[iparam+1] ;
580 epar = fitparameters[iparam+2] ;
581 iparam += 3 ;
582 distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
583 distance = TMath::Sqrt(distance) ;
584 efit[iDigit] += epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ;
585 }
586 }
587
588 iparam = 0 ;
589 Float_t eDigit ;
590
591
592 while(iparam < nPar ){
593 xpar = fitparameters[iparam] ;
594 zpar = fitparameters[iparam+1] ;
595 epar = fitparameters[iparam+2] ;
596 iparam += 3 ;
597
598 if(iRecPoint >= emcIn->GetSize())
599 emcIn->Expand(2*iRecPoint) ;
600 (*emcIn)[iRecPoint] = new AliPHOSEmcRecPoint( iniEmc->GetLogWeightCut(), iniEmc->GetLocMaxCut() ) ;
601
602 emcRP = (AliPHOSEmcRecPoint *) emcIn->At(iRecPoint);
603 iRecPoint++ ;
604
605 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
606 digit = fPlease->GimeDigit( emcDigits[iDigit] ) ;
607 fGeom->AbsToRelNumbering(digit->GetId(), relid) ;
608 fGeom->RelPosInModule(relid, xDigit, zDigit) ;
609 distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
610 distance = TMath::Sqrt(distance) ;
611 ratio = epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) / efit[iDigit] ;
612 eDigit = emcEnergies[iDigit] * ratio ;
613 emcRP->AddDigit( *digit, eDigit ) ;
614 }
615
616 }
617
618 delete[] fitparameters ;
619 delete[] efit ;
620
621}
622
623//______________________________________________________________________________
624void UnfoldingChiSquare(Int_t & nPar, Double_t * Grad, Double_t & fret, Double_t * x, Int_t iflag)
625{
626 // Calculates th Chi square for the cluster unfolding minimization
627 // Number of parameters, Gradient, Chi squared, parameters, what to do
628
629 AliPHOSEmcRecPoint * emcRP = (AliPHOSEmcRecPoint *) gMinuit->GetObjectFit() ; // EmcRecPoint to fit
630
631 Int_t * emcDigits = emcRP->GetDigitsList() ;
632
633 Int_t nOfDigits = emcRP->GetDigitsMultiplicity() ;
634
635 Float_t * emcEnergies = emcRP->GetEnergiesList() ;
636
637 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
638
639 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
640
641 fret = 0. ;
642 Int_t iparam ;
643
644 if(iflag == 2)
645 for(iparam = 0 ; iparam < nPar ; iparam++)
646 Grad[iparam] = 0 ; // Will evaluate gradient
647
648 Double_t efit ;
649
650 AliPHOSDigit * digit ;
651 Int_t iDigit ;
652
653 for( iDigit = 0 ; iDigit < nOfDigits ; iDigit++) {
654
655 digit = please->GimeDigit( emcDigits[iDigit] ) ;
656
657 Int_t relid[4] ;
658 Float_t xDigit ;
659 Float_t zDigit ;
660
661 geom->AbsToRelNumbering(digit->GetId(), relid) ;
662
663 geom->RelPosInModule(relid, xDigit, zDigit) ;
664
665 if(iflag == 2){ // calculate gradient
666 Int_t iParam = 0 ;
667 efit = 0 ;
668 while(iParam < nPar ){
669 Double_t distance = (xDigit - x[iParam]) * (xDigit - x[iParam]) ;
670 iParam++ ;
671 distance += (zDigit - x[iParam]) * (zDigit - x[iParam]) ;
672 distance = TMath::Sqrt( distance ) ;
673 iParam++ ;
674 efit += x[iParam] * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ;
675 iParam++ ;
676 }
677 Double_t sum = 2. * (efit - emcEnergies[iDigit]) / emcEnergies[iDigit] ; // Here we assume, that sigma = sqrt(E)
678 iParam = 0 ;
679 while(iParam < nPar ){
680 Double_t xpar = x[iParam] ;
681 Double_t zpar = x[iParam+1] ;
682 Double_t epar = x[iParam+2] ;
683 Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) );
684 Double_t shape = sum * AliPHOSTrackSegmentMakerv1::ShowerShape(dr) ;
685 Double_t r4 = dr*dr*dr*dr ;
686 Double_t r295 = TMath::Power(dr,2.95) ;
687 Double_t deriv =-4. * dr*dr * ( 2.32 / ( (2.32 + 0.26 * r4) * (2.32 + 0.26 * r4) ) +
688 0.0316 * (1. + 0.0171 * r295) / ( ( 1. + 0.0652 * r295) * (1. + 0.0652 * r295) ) ) ;
689
690 Grad[iParam] += epar * shape * deriv * (xpar - xDigit) ; // Derivative over x
691 iParam++ ;
692 Grad[iParam] += epar * shape * deriv * (zpar - zDigit) ; // Derivative over z
693 iParam++ ;
694 Grad[iParam] += shape ; // Derivative over energy
695 iParam++ ;
696 }
697 }
698 efit = 0;
699 iparam = 0 ;
700
701 while(iparam < nPar ){
702 Double_t xpar = x[iparam] ;
703 Double_t zpar = x[iparam+1] ;
704 Double_t epar = x[iparam+2] ;
705 iparam += 3 ;
706 Double_t distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
707 distance = TMath::Sqrt(distance) ;
708 efit += epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ;
709 }
710
711 fret += (efit-emcEnergies[iDigit])*(efit-emcEnergies[iDigit])/emcEnergies[iDigit] ;
712 // Here we assume, that sigma = sqrt(E)
713 }
714
715}