Corrections to comply with coding convention
[u/mrichter/AliRoot.git] / PHOS / AliPHOSTrackSegmentMakerv1.cxx
CommitLineData
d15a28e7 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
b2a60966 16/* $Id$ */
17
d15a28e7 18//_________________________________________________________________________
b2a60966 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//
d15a28e7 25
26// --- ROOT system ---
27
28#include "TObjArray.h"
29#include "TClonesArray.h"
9f616d61 30#include "TObjectTable.h"
d15a28e7 31
32// --- Standard library ---
33
de9ec31b 34#include <iostream.h>
d15a28e7 35
36// --- AliRoot header files ---
37
38#include "AliPHOSTrackSegmentMakerv1.h"
39#include "AliPHOSTrackSegment.h"
40#include "AliPHOSLink.h"
41#include "AliPHOSv0.h"
42#include "AliRun.h"
43
92862013 44extern void UnfoldingChiSquare(Int_t &nPar, Double_t *Grad, Double_t & fret, Double_t *x, Int_t iflag) ;
9f616d61 45
d15a28e7 46ClassImp( AliPHOSTrackSegmentMakerv1)
47
48
49//____________________________________________________________________________
b2a60966 50 AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1() : AliPHOSTrackSegmentMaker()
d15a28e7 51{
9f616d61 52 // ctor
b2a60966 53
d15a28e7 54 fR0 = 4. ;
55 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
56 //clusters are sorted in "rows" and "columns" of width geom->GetCrystalSize(0),
57 fDelta = fR0 + geom->GetCrystalSize(0) ;
6727be7e 58 fMinuit = new TMinuit(100) ;
59 fUnfoldFlag = kTRUE ;
d15a28e7 60}
61
62//____________________________________________________________________________
9f616d61 63 AliPHOSTrackSegmentMakerv1::~AliPHOSTrackSegmentMakerv1()
64{
65 // dtor
b2a60966 66
67 delete fMinuit ;
9f616d61 68}
b2a60966 69
9f616d61 70//____________________________________________________________________________
d15a28e7 71Bool_t AliPHOSTrackSegmentMakerv1::FindFit(AliPHOSEmcRecPoint * emcRP, int * maxAt, Float_t * maxAtEnergy,
92862013 72 Int_t nPar, Float_t * fitparameters)
9f616d61 73{
b2a60966 74 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
6ad0bfa0 75
d15a28e7 76 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
d15a28e7 77
9f616d61 78 gMinuit->SetPrintLevel(-1) ; // No Printout
79 gMinuit->SetFCN(UnfoldingChiSquare) ; // To set the address of the minimization function
80 gMinuit->SetObjectFit(emcRP) ; // To tranfer pointer to UnfoldingChiSquare
81
82 // filling initial values for fit parameters
d15a28e7 83 AliPHOSDigit * digit ;
9f616d61 84
85 Int_t ierflg = 0;
86 Int_t index = 0 ;
92862013 87 Int_t nDigits = (Int_t) nPar / 3 ;
9f616d61 88
d15a28e7 89 Int_t iDigit ;
9f616d61 90
91
92862013 92 for(iDigit = 0; iDigit < nDigits; iDigit++){
d15a28e7 93 digit = (AliPHOSDigit *) maxAt[iDigit];
94
92862013 95 Int_t relid[4] ;
d15a28e7 96 Float_t x ;
97 Float_t z ;
92862013 98 geom->AbsToRelNumbering(digit->GetId(), relid) ;
99 geom->RelPosInModule(relid, x, z) ;
d15a28e7 100
92862013 101 Float_t energy = maxAtEnergy[iDigit] ;
d15a28e7 102
9f616d61 103 gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ;
104 index++ ;
d15a28e7 105 if(ierflg != 0){
106 cout << "PHOS Unfolding> Unable to set initial value for fit procedure : x = " << x << endl ;
107 return kFALSE;
108 }
9f616d61 109 gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ;
110 index++ ;
d15a28e7 111 if(ierflg != 0){
112 cout << "PHOS Unfolding> Unable to set initial value for fit procedure : z = " << z << endl ;
113 return kFALSE;
114 }
92862013 115 gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;
9f616d61 116 index++ ;
d15a28e7 117 if(ierflg != 0){
92862013 118 cout << "PHOS Unfolding> Unable to set initial value for fit procedure : energy = " << energy << endl ;
d15a28e7 119 return kFALSE;
6ad0bfa0 120 }
d15a28e7 121 }
122
9f616d61 123 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ; The number of function call slightly
124 // depends on it.
125 Double_t p1 = 1.0 ;
126 Double_t p2 = 0.0 ;
127
128 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TgMinuit to reduce function calls
129 gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
d15a28e7 130 gMinuit->SetMaxIterations(5);
9f616d61 131 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
132 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
133 if(ierflg == 4){ // Minimum not found
134 cout << "PHOS Unfolding> Fit not converged, cluster abandoned "<< endl ;
d15a28e7 135 return kFALSE ;
136 }
92862013 137 for(index = 0; index < nPar; index++){
d15a28e7 138 Double_t err ;
139 Double_t val ;
9f616d61 140 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
92862013 141 fitparameters[index] = val ;
d15a28e7 142 }
d15a28e7 143 return kTRUE;
9f616d61 144
d15a28e7 145}
9f616d61 146
d15a28e7 147//____________________________________________________________________________
88714635 148void AliPHOSTrackSegmentMakerv1::FillOneModule(DigitsList * dl,
149 AliPHOSRecPoint::RecPointsList * emcIn,
150 TObjArray * emcOut,
151 AliPHOSRecPoint::RecPointsList * ppsdIn,
152 TObjArray * ppsdOutUp,
153 TObjArray * ppsdOutLow,
154 Int_t & phosmod,
155 Int_t & emcStopedAt,
156 Int_t & ppsdStopedAt)
9f616d61 157{
158 // Unfold clusters and fill xxxOut arrays with clusters from one PHOS module
159
160 AliPHOSEmcRecPoint * emcRecPoint ;
d15a28e7 161 AliPHOSPpsdRecPoint * ppsdRecPoint ;
162 Int_t index ;
6ad0bfa0 163
92862013 164 Int_t nEmcUnfolded = emcIn->GetEntries() ;
165 for(index = emcStopedAt; index < nEmcUnfolded; index++){
83974468 166 emcRecPoint = (AliPHOSEmcRecPoint *) emcIn->At(index) ;
6ad0bfa0 167
92862013 168 if(emcRecPoint->GetPHOSMod() != phosmod )
9f616d61 169 break ;
170
92862013 171 Int_t nMultipl = emcRecPoint->GetMultiplicity() ;
31aa6d6c 172 Int_t * maxAt = new Int_t[nMultipl] ;
173 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
92862013 174 Int_t nMax = emcRecPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy) ;
6a3f1304 175
6727be7e 176 if(nMax <= 1 ) // if cluster is very flat (no pronounced maximum) then nMax = 0
d15a28e7 177 emcOut->Add(emcRecPoint) ;
6727be7e 178 else if (fUnfoldFlag) {
b2a60966 179 UnfoldClusters(dl, emcIn, emcRecPoint, nMax, maxAt, maxAtEnergy, emcOut) ;
d15a28e7 180 emcIn->Remove(emcRecPoint);
181 emcIn->Compress() ;
92862013 182 nEmcUnfolded-- ;
d15a28e7 183 index-- ;
184 }
31aa6d6c 185
186 delete[] maxAt ;
187 delete[] maxAtEnergy ;
d15a28e7 188 }
189 emcStopedAt = index ;
190
191 for(index = ppsdStopedAt; index < ppsdIn->GetEntries(); index++){
83974468 192 ppsdRecPoint = (AliPHOSPpsdRecPoint *) ppsdIn->At(index) ;
92862013 193 if(ppsdRecPoint->GetPHOSMod() != phosmod )
9f616d61 194 break ;
d15a28e7 195 if(ppsdRecPoint->GetUp() )
196 ppsdOutUp->Add(ppsdRecPoint) ;
197 else
198 ppsdOutLow->Add(ppsdRecPoint) ;
199 }
200 ppsdStopedAt = index ;
6ad0bfa0 201
d15a28e7 202 emcOut->Sort() ;
203 ppsdOutUp->Sort() ;
6ad0bfa0 204 ppsdOutLow->Sort() ;
d15a28e7 205}
206//____________________________________________________________________________
92862013 207Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcclu,AliPHOSPpsdRecPoint * PpsdClu, Bool_t &toofar)
d15a28e7 208{
b2a60966 209 // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
210
92862013 211 Float_t r = fR0 ;
d15a28e7 212
213 TVector3 vecEmc ;
214 TVector3 vecPpsd ;
215
92862013 216 emcclu->GetLocalPosition(vecEmc) ;
d15a28e7 217 PpsdClu->GetLocalPosition(vecPpsd) ;
92862013 218 if(emcclu->GetPHOSMod() == PpsdClu->GetPHOSMod()){
d15a28e7 219 if(vecPpsd.X() >= vecEmc.X() - fDelta ){
220 if(vecPpsd.Z() >= vecEmc.Z() - fDelta ){
221 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
6ad0bfa0 222 // Correct to difference in CPV and EMC position due to different distance to center.
223 // we assume, that particle moves from center
92862013 224 Float_t dCPV = geom->GetIPtoOuterCoverDistance();
225 Float_t dEMC = geom->GetIPtoCrystalSurface() ;
226 dEMC = dEMC / dCPV ;
227 vecPpsd = dEMC * vecPpsd - vecEmc ;
228 r = vecPpsd.Mag() ;
d15a28e7 229 } // if zPpsd >= zEmc - fDelta
92862013 230 toofar = kFALSE ;
d15a28e7 231 } // if xPpsd >= xEmc - fDelta
232 else
92862013 233 toofar = kTRUE ;
d15a28e7 234 }
235 else
92862013 236 toofar = kTRUE ;
d15a28e7 237
92862013 238 return r ;
d15a28e7 239}
240
241//____________________________________________________________________________
92862013 242void AliPHOSTrackSegmentMakerv1::MakeLinks(TObjArray * emcRecPoints, TObjArray * ppsdRecPointsUp,
243 TObjArray * ppsdRecPointsLow, TClonesArray * linklowArray,
244 TClonesArray *linkupArray)
d15a28e7 245{
b2a60966 246 // Finds distances (links) between all EMC and PPSD clusters, which are not further apart from each other than fR0
247
92862013 248 TIter nextEmc(emcRecPoints) ;
d15a28e7 249 Int_t iEmcClu = 0 ;
250
92862013 251 AliPHOSPpsdRecPoint * ppsdlow ;
252 AliPHOSPpsdRecPoint * ppsdup ;
253 AliPHOSEmcRecPoint * emcclu ;
d15a28e7 254
255 Int_t iLinkLow = 0 ;
256 Int_t iLinkUp = 0 ;
257
92862013 258 while( (emcclu = (AliPHOSEmcRecPoint*)nextEmc() ) ) {
259 Bool_t toofar ;
260 TIter nextPpsdLow(ppsdRecPointsLow ) ;
d15a28e7 261 Int_t iPpsdLow = 0 ;
262
92862013 263 while( (ppsdlow = (AliPHOSPpsdRecPoint*)nextPpsdLow() ) ) {
264 Float_t r = GetDistanceInPHOSPlane(emcclu, ppsdlow, toofar) ;
d15a28e7 265
92862013 266 if(toofar)
d15a28e7 267 break ;
83974468 268 if(r < fR0){
92862013 269 new( (*linklowArray)[iLinkLow++]) AliPHOSLink(r, iEmcClu, iPpsdLow) ;
83974468 270 }
d15a28e7 271 iPpsdLow++ ;
272
273 }
274
92862013 275 TIter nextPpsdUp(ppsdRecPointsUp ) ;
d15a28e7 276 Int_t iPpsdUp = 0 ;
277
92862013 278 while( (ppsdup = (AliPHOSPpsdRecPoint*)nextPpsdUp() ) ) {
279 Float_t r = GetDistanceInPHOSPlane(emcclu, ppsdup, toofar) ;
d15a28e7 280
92862013 281 if(toofar)
d15a28e7 282 break ;
83974468 283 if(r < fR0) {
92862013 284 new( (*linkupArray)[iLinkUp++]) AliPHOSLink(r, iEmcClu, iPpsdUp) ;
83974468 285 }
d15a28e7 286 iPpsdUp++ ;
287
288 }
289
290 iEmcClu++ ;
291
292 } // while nextEmC
293
92862013 294 linklowArray->Sort() ; //first links with smallest distances
295 linkupArray->Sort() ;
d15a28e7 296}
297
298//____________________________________________________________________________
88714635 299void AliPHOSTrackSegmentMakerv1::MakePairs(TObjArray * emcRecPoints,
300 TObjArray * ppsdRecPointsUp,
301 TObjArray * ppsdRecPointsLow,
302 TClonesArray * linklowArray,
303 TClonesArray * linkupArray,
304 AliPHOSTrackSegment::TrackSegmentsList * trsl)
6ad0bfa0 305{
306
307 // Finds the smallest links and makes pairs of PPSD and EMC clusters with smallest distance
308
92862013 309 TIter nextLow(linklowArray) ;
310 TIter nextUp(linkupArray) ;
d15a28e7 311
312 AliPHOSLink * linkLow ;
313 AliPHOSLink * linkUp ;
314
315 AliPHOSEmcRecPoint * emc ;
316 AliPHOSPpsdRecPoint * ppsdLow ;
317 AliPHOSPpsdRecPoint * ppsdUp ;
318
92862013 319 AliPHOSRecPoint * nullpointer = 0 ;
9f616d61 320
d15a28e7 321 while ( (linkLow = (AliPHOSLink *)nextLow() ) ){
92862013 322 emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(linkLow->GetEmc()) ;
323 ppsdLow = (AliPHOSPpsdRecPoint *) ppsdRecPointsLow->At(linkLow->GetPpsd()) ;
6ad0bfa0 324 if( (emc) && (ppsdLow) ){ // RecPoints not removed yet
d15a28e7 325 ppsdUp = 0 ;
326
327 while ( (linkUp = (AliPHOSLink *)nextUp() ) ){
328 if(linkLow->GetEmc() == linkUp->GetEmc() ){
92862013 329 ppsdUp = (AliPHOSPpsdRecPoint *) ppsdRecPointsUp->At(linkUp->GetPpsd()) ;
d15a28e7 330 break ;
331 }
332
333 } // while nextUp
334
335 nextUp.Reset();
b2a60966 336// AliPHOSTrackSegment * subtr = new AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ;
337// trsl->Add(subtr) ;
338 new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ;
339 fNTrackSegments++ ;
92862013 340 emcRecPoints->AddAt(nullpointer,linkLow->GetEmc()) ;
341 ppsdRecPointsLow->AddAt(nullpointer,linkLow->GetPpsd()) ;
d15a28e7 342
343 if(ppsdUp)
92862013 344 ppsdRecPointsUp->AddAt(nullpointer,linkUp->GetPpsd()) ;
d15a28e7 345
6ad0bfa0 346 }
d15a28e7 347 }
348
92862013 349 TIter nextEmc(emcRecPoints) ;
d15a28e7 350 nextEmc.Reset() ;
351
92862013 352 while( (emc = (AliPHOSEmcRecPoint*)nextEmc()) ){ //to create pairs if no ppsdlow
9f616d61 353 ppsdLow = 0 ;
354 ppsdUp = 0 ;
d15a28e7 355
356 while ( (linkUp = (AliPHOSLink *)nextUp() ) ){
357
92862013 358 if(emcRecPoints->IndexOf(emc) == linkUp->GetEmc() ){
359 ppsdUp = (AliPHOSPpsdRecPoint *) ppsdRecPointsUp->At(linkUp->GetPpsd()) ;
d15a28e7 360 break ;
361 }
362
363 }
b2a60966 364// AliPHOSTrackSegment * subtr = new AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ;
365// trsl->Add(subtr) ;
366 new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ;
367 fNTrackSegments++ ;
368
369
d15a28e7 370 if(ppsdUp)
92862013 371 ppsdRecPointsUp->AddAt(nullpointer,linkUp->GetPpsd()) ;
d15a28e7 372 }
373
374}
375
376//____________________________________________________________________________
88714635 377void AliPHOSTrackSegmentMakerv1::MakeTrackSegments(DigitsList * dl,
378 AliPHOSRecPoint::RecPointsList * emcl,
379 AliPHOSRecPoint::RecPointsList * ppsdl,
380 AliPHOSTrackSegment::TrackSegmentsList * trsl)
d15a28e7 381{
b2a60966 382 // Makes the track segments out of the list of EMC and PPSD Recpoints and stores them in a list
d15a28e7 383
92862013 384 Int_t phosmod = 1 ;
9f616d61 385 Int_t emcStopedAt = 0 ;
d15a28e7 386 Int_t ppsdStopedAt = 0 ;
387
92862013 388 TObjArray * emcRecPoints = new TObjArray(100) ; // these arrays keep pointers
389 TObjArray * ppsdRecPointsUp = new TObjArray(100) ; // to RecPoints, which are
390 TObjArray * ppsdRecPointsLow = new TObjArray(100) ; // kept in TClonesArray's emcl and ppsdl
d15a28e7 391
392
92862013 393 TClonesArray * linklowArray = new TClonesArray("AliPHOSLink", 100);
394 TClonesArray * linkupArray = new TClonesArray("AliPHOSLink", 100);
d15a28e7 395
396 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
397
92862013 398 while(phosmod <= geom->GetNModules() ){
d15a28e7 399
b2a60966 400 FillOneModule(dl, emcl, emcRecPoints, ppsdl, ppsdRecPointsUp, ppsdRecPointsLow, phosmod, emcStopedAt, ppsdStopedAt) ;
6ad0bfa0 401
92862013 402 MakeLinks(emcRecPoints, ppsdRecPointsUp, ppsdRecPointsLow, linklowArray, linkupArray) ;
d15a28e7 403
92862013 404 MakePairs(emcRecPoints, ppsdRecPointsUp, ppsdRecPointsLow, linklowArray, linkupArray, trsl) ;
d15a28e7 405
92862013 406 emcRecPoints->Clear() ;
9f616d61 407
92862013 408 ppsdRecPointsUp->Clear() ;
9f616d61 409
92862013 410 ppsdRecPointsLow->Clear() ;
9f616d61 411
92862013 412 linkupArray->Clear() ;
9f616d61 413
92862013 414 linklowArray->Clear() ;
9f616d61 415
92862013 416 phosmod++ ;
d15a28e7 417 }
92862013 418 delete emcRecPoints ;
419 emcRecPoints = 0 ;
9f616d61 420
92862013 421 delete ppsdRecPointsUp ;
422 ppsdRecPointsUp = 0 ;
9f616d61 423
92862013 424 delete ppsdRecPointsLow ;
425 ppsdRecPointsLow = 0 ;
9f616d61 426
92862013 427 delete linkupArray ;
428 linkupArray = 0 ;
9f616d61 429
92862013 430 delete linklowArray ;
431 linklowArray = 0 ;
d15a28e7 432}
433
434//____________________________________________________________________________
9f616d61 435Double_t AliPHOSTrackSegmentMakerv1::ShowerShape(Double_t r)
436{
b2a60966 437 // Shape of the shower (see PHOS TDR)
438 // If you change this function, change also the gradien evaluation in ChiSquare()
439
6ad0bfa0 440 Double_t r4 = r*r*r*r ;
441 Double_t r295 = TMath::Power(r, 2.95) ;
d15a28e7 442 Double_t shape = TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ;
443 return shape ;
444}
445
446//____________________________________________________________________________
88714635 447void AliPHOSTrackSegmentMakerv1::UnfoldClusters(DigitsList * dl,
448 AliPHOSRecPoint::RecPointsList * emcIn,
449 AliPHOSEmcRecPoint * iniEmc,
450 Int_t nMax,
451 int * maxAt,
452 Float_t * maxAtEnergy,
453 TObjArray * emcList)
d15a28e7 454{
b2a60966 455 // Performs the unfolding of a cluster with nMax overlapping showers
456 // This is time consuming (use the (Un)SetUnfolFlag() )
457
92862013 458 Int_t nPar = 3 * nMax ;
31aa6d6c 459 Float_t * fitparameters = new Float_t[nPar] ;
d15a28e7 460 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
9f616d61 461
92862013 462 Bool_t rv = FindFit(iniEmc, maxAt, maxAtEnergy, nPar, fitparameters) ;
31aa6d6c 463 if( !rv ) {
464 // Fit failed, return and remove cluster
465 delete[] fitparameters ;
d15a28e7 466 return ;
31aa6d6c 467 }
d15a28e7 468
469 Float_t xDigit ;
470 Float_t zDigit ;
92862013 471 Int_t relid[4] ;
d15a28e7 472
92862013 473 Int_t nDigits = iniEmc->GetMultiplicity() ;
d15a28e7 474 Float_t xpar ;
475 Float_t zpar ;
92862013 476 Float_t epar ;
477 Float_t distance ;
478 Float_t ratio ;
31aa6d6c 479 Float_t * efit = new Float_t[nDigits] ;
d15a28e7 480 Int_t iparam ;
481 Int_t iDigit ;
482
483 AliPHOSDigit * digit ;
484 AliPHOSEmcRecPoint * emcRP ;
6ad0bfa0 485 Int_t * emcDigits = iniEmc->GetDigitsList() ;
d15a28e7 486 Float_t * emcEnergies = iniEmc->GetEnergiesList() ;
487
488 Int_t iRecPoint = emcIn->GetEntries() ;
489
92862013 490 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
d15a28e7 491 digit = (AliPHOSDigit *) emcDigits[iDigit];
92862013 492 geom->AbsToRelNumbering(digit->GetId(), relid) ;
493 geom->RelPosInModule(relid, xDigit, zDigit) ;
494 efit[iDigit] = 0;
d15a28e7 495 iparam = 0 ;
496
92862013 497 while(iparam < nPar ){
498 xpar = fitparameters[iparam] ;
499 zpar = fitparameters[iparam+1] ;
500 epar = fitparameters[iparam+2] ;
d15a28e7 501 iparam += 3 ;
92862013 502 distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
503 distance = TMath::Sqrt(distance) ;
b2a60966 504 efit[iDigit] += epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ;
d15a28e7 505 }
d15a28e7 506 }
507
508 iparam = 0 ;
509 Float_t eDigit ;
510
92862013 511 while(iparam < nPar ){
512 xpar = fitparameters[iparam] ;
513 zpar = fitparameters[iparam+1] ;
514 epar = fitparameters[iparam+2] ;
d15a28e7 515 iparam += 3 ;
516 new ((*emcIn)[iRecPoint]) AliPHOSEmcRecPoint( iniEmc->GetLogWeightCut(), iniEmc->GetLocMaxCut() ) ;
517 emcRP = (AliPHOSEmcRecPoint *) emcIn->At(iRecPoint++);
518
92862013 519 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
d15a28e7 520 digit = (AliPHOSDigit *) emcDigits[iDigit];
92862013 521 geom->AbsToRelNumbering(digit->GetId(), relid) ;
522 geom->RelPosInModule(relid, xDigit, zDigit) ;
523 distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
524 distance = TMath::Sqrt(distance) ;
b2a60966 525 ratio = epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) / efit[iDigit] ;
92862013 526 eDigit = emcEnergies[iDigit] * ratio ;
9f616d61 527 emcRP->AddDigit( *digit, eDigit ) ;
d15a28e7 528 }
529
530 emcList->Add(emcRP) ;
531
532 }
31aa6d6c 533
534 delete[] fitparameters ;
535 delete[] efit ;
536
d15a28e7 537}
6ad0bfa0 538
d15a28e7 539//______________________________________________________________________________
92862013 540void UnfoldingChiSquare(Int_t & nPar, Double_t * Grad, Double_t & fret, Double_t * x, Int_t iflag)
d15a28e7 541{
b2a60966 542 // Calculates th Chi square for the cluster unfolding minimization
543 // Number of parameters, Gradient, Chi squared, parameters, what to do
9f616d61 544
d15a28e7 545 AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ;
d15a28e7 546
9f616d61 547 AliPHOSEmcRecPoint * emcRP = (AliPHOSEmcRecPoint *) gMinuit->GetObjectFit() ; // EmcRecPoint to fit
6ad0bfa0 548 Int_t * emcDigits = emcRP->GetDigitsList() ;
d15a28e7 549 Float_t * emcEnergies = emcRP->GetEnergiesList() ;
550 fret = 0. ;
551 Int_t iparam ;
552
9f616d61 553 if(iflag == 2)
92862013 554 for(iparam = 0 ; iparam < nPar ; iparam++)
9f616d61 555 Grad[iparam] = 0 ; // Will evaluate gradient
556
92862013 557 Double_t efit ;
9f616d61 558
d15a28e7 559 AliPHOSDigit * digit ;
560 Int_t iDigit = 0 ;
9f616d61 561
d15a28e7 562 while ( (digit = (AliPHOSDigit *)emcDigits[iDigit] )){
92862013 563 Int_t relid[4] ;
d15a28e7 564 Float_t xDigit ;
565 Float_t zDigit ;
92862013 566 geom->AbsToRelNumbering(digit->GetId(), relid) ;
567 geom->RelPosInModule(relid, xDigit, zDigit) ;
d15a28e7 568
9f616d61 569 if(iflag == 2){ // calculate gradient
570 Int_t iParam = 0 ;
92862013 571 efit = 0 ;
572 while(iParam < nPar ){
573 Double_t distance = (xDigit - x[iParam]) * (xDigit - x[iParam]) ;
9f616d61 574 iParam++ ;
92862013 575 distance += (zDigit - x[iParam]) * (zDigit - x[iParam]) ;
576 distance = TMath::Sqrt( distance ) ;
9f616d61 577 iParam++ ;
92862013 578 efit += x[iParam] * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ;
9f616d61 579 iParam++ ;
580 }
92862013 581 Double_t sum = 2. * (efit - emcEnergies[iDigit]) / emcEnergies[iDigit] ; // Here we assume, that sigma = sqrt(E)
9f616d61 582 iParam = 0 ;
92862013 583 while(iParam < nPar ){
9f616d61 584 Double_t xpar = x[iParam] ;
585 Double_t zpar = x[iParam+1] ;
92862013 586 Double_t epar = x[iParam+2] ;
9f616d61 587 Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) );
588 Double_t shape = sum * AliPHOSTrackSegmentMakerv1::ShowerShape(dr) ;
589 Double_t r4 = dr*dr*dr*dr ;
590 Double_t r295 = TMath::Power(dr,2.95) ;
591 Double_t deriv =-4. * dr*dr * ( 2.32 / ( (2.32 + 0.26 * r4) * (2.32 + 0.26 * r4) ) +
592 0.0316 * (1. + 0.0171 * r295) / ( ( 1. + 0.0652 * r295) * (1. + 0.0652 * r295) ) ) ;
593
92862013 594 Grad[iParam] += epar * shape * deriv * (xpar - xDigit) ; // Derivative over x
9f616d61 595 iParam++ ;
92862013 596 Grad[iParam] += epar * shape * deriv * (zpar - zDigit) ; // Derivative over z
9f616d61 597 iParam++ ;
598 Grad[iParam] += shape ; // Derivative over energy
599 iParam++ ;
600 }
601 }
92862013 602 efit = 0;
9f616d61 603 iparam = 0 ;
92862013 604 while(iparam < nPar ){
9f616d61 605 Double_t xpar = x[iparam] ;
606 Double_t zpar = x[iparam+1] ;
92862013 607 Double_t epar = x[iparam+2] ;
9f616d61 608 iparam += 3 ;
92862013 609 Double_t distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ;
610 distance = TMath::Sqrt(distance) ;
611 efit += epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ;
9f616d61 612 }
92862013 613 fret += (efit-emcEnergies[iDigit])*(efit-emcEnergies[iDigit])/emcEnergies[iDigit] ;
9f616d61 614 // Here we assume, that sigma = sqrt(E)
615 iDigit++ ;
d15a28e7 616 }
617}