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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 | //_________________________________________________________________________ |
17 | // A brief description of the class |
18 | //*-- Author : Yves Schutz SUBATECH |
19 | ////////////////////////////////////////////////////////////////////////////// |
20 | |
21 | // --- ROOT system --- |
22 | |
23 | #include "TObjArray.h" |
24 | #include "TClonesArray.h" |
25 | #include "TMinuit.h" |
26 | |
27 | // --- Standard library --- |
28 | |
29 | #include "iostream.h" |
30 | |
31 | // --- AliRoot header files --- |
32 | |
33 | #include "AliPHOSTrackSegmentMakerv1.h" |
34 | #include "AliPHOSTrackSegment.h" |
35 | #include "AliPHOSLink.h" |
36 | #include "AliPHOSv0.h" |
37 | #include "AliRun.h" |
38 | |
39 | ClassImp( AliPHOSTrackSegmentMakerv1) |
40 | |
41 | |
42 | //____________________________________________________________________________ |
43 | AliPHOSTrackSegmentMakerv1:: AliPHOSTrackSegmentMakerv1() // ctor |
44 | { |
45 | fR0 = 4. ; |
46 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
47 | //clusters are sorted in "rows" and "columns" of width geom->GetCrystalSize(0), |
48 | fDelta = fR0 + geom->GetCrystalSize(0) ; |
49 | } |
50 | |
51 | //____________________________________________________________________________ |
52 | Bool_t AliPHOSTrackSegmentMakerv1::FindFit(AliPHOSEmcRecPoint * emcRP, int * maxAt, Float_t * maxAtEnergy, |
53 | Int_t NPar, Float_t * FitParametres) |
54 | { //Calls TMinuit for fitting cluster with several maxima |
55 | |
56 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
57 | TMinuit *gMinuit = new TMinuit(NPar); //initialize TMinuit with a maximum of 5 params |
58 | gMinuit->SetPrintLevel(-1) ; //No PRIntout |
59 | gMinuit->SetFCN(UnfoldingChiSquare ); //To set the address of the minimization function |
60 | gMinuit->SetObjectFit(emcRP) ; //To tranfer pointer to UnfoldingChiSquare |
61 | |
62 | //filling initial values for fit parameters |
63 | AliPHOSDigit * digit ; |
64 | Int_t ierflg = 0; |
65 | Int_t index = 0 ; |
66 | Int_t NDigits = (Int_t) NPar / 3 ; |
67 | Int_t iDigit ; |
68 | for(iDigit = 0 ; iDigit < NDigits ; iDigit ++){ |
69 | digit = (AliPHOSDigit *) maxAt[iDigit]; |
70 | |
71 | Int_t RelId[4] ; |
72 | Float_t x ; |
73 | Float_t z ; |
74 | geom->AbsToRelNumbering(digit->GetId(),RelId) ; |
75 | geom->RelPosInModule(RelId,x,z) ; |
76 | |
77 | Float_t Energy = maxAtEnergy[iDigit] ; |
78 | |
79 | gMinuit->mnparm(index++, " ", x, 0.1, 0, 0, ierflg) ; |
80 | if(ierflg != 0){ |
81 | cout << "PHOS Unfolding> Unable to set initial value for fit procedure : x = " << x << endl ; |
82 | return kFALSE; |
83 | } |
84 | gMinuit->mnparm(index++, " ", z, 0.1, 0, 0, ierflg) ; |
85 | if(ierflg != 0){ |
86 | cout << "PHOS Unfolding> Unable to set initial value for fit procedure : z = " << z << endl ; |
87 | return kFALSE; |
88 | } |
89 | gMinuit->mnparm(index++, " ", Energy , 0.05*Energy, 0., 4.*Energy, ierflg) ; |
90 | if(ierflg != 0){ |
91 | cout << "PHOS Unfolding> Unable to set initial value for fit procedure : Energy = " << Energy << endl ; |
92 | return kFALSE; |
93 | } |
94 | } |
95 | |
96 | Double_t p0=0.1; //"Tolerance" Evaluation stops when EDM = 0.0001*p0 ; The number of function call slightly |
97 | //depends on it. |
98 | Double_t p1 = 1.; |
99 | |
100 | gMinuit->mnexcm("SET STR", 0, 0, ierflg) ; //force TMinuit to reduce function calls |
101 | gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; //force TMinuit to use my gradient |
102 | gMinuit->SetMaxIterations(5); |
103 | gMinuit->mnexcm("SET NOW", 0 , 0, ierflg) ; //No Warnings |
104 | gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg); // minimize |
105 | if(ierflg == 4){ //Minimum not found |
106 | cout << "PHOS Unfolding> Fit not converged, cluster abondoned "<< endl ; |
107 | return kFALSE ; |
108 | } |
109 | for(index = 0; index < NPar; index++){ |
110 | Double_t err ; |
111 | Double_t val ; |
112 | gMinuit->GetParameter(index, val, err) ; //Returns value and error of parameter index |
113 | FitParametres[index] = val ; |
114 | } |
115 | gMinuit->Delete() ; |
116 | return kTRUE; |
117 | } |
118 | //____________________________________________________________________________ |
119 | void AliPHOSTrackSegmentMakerv1::FillOneModule(DigitsList * Dl, RecPointsList * emcIn, TObjArray * emcOut, |
120 | RecPointsList * ppsdIn, TObjArray * ppsdOutUp, |
121 | TObjArray * ppsdOutLow, Int_t &PHOSMod, Int_t & emcStopedAt, |
122 | Int_t & ppsdStopedAt) |
123 | {// Unfold clusters and fill xxxOut arrais with clusters from ome PHOS modeule |
124 | AliPHOSEmcRecPoint * emcRecPoint ; |
125 | AliPHOSPpsdRecPoint * ppsdRecPoint ; |
126 | Int_t index ; |
127 | |
128 | Int_t NemcUnfolded = emcIn->GetEntries() ; |
129 | for(index = emcStopedAt; index < NemcUnfolded; index++){ |
130 | |
131 | emcRecPoint = (AliPHOSEmcRecPoint *) (*emcIn)[index] ; |
132 | |
133 | if(emcRecPoint->GetPHOSMod() != PHOSMod ) |
134 | break ; |
135 | |
136 | Int_t NMultipl = emcRecPoint->GetMultiplicity() ; |
137 | int maxAt[NMultipl] ; |
138 | Float_t maxAtEnergy[NMultipl] ; |
139 | Int_t Nmax = emcRecPoint->GetNumberOfLocalMax(maxAt,maxAtEnergy) ; |
140 | |
141 | if(Nmax<=1) // if cluster is very flat, so that no prononsed maximum, then Nmax = 0 |
142 | emcOut->Add(emcRecPoint) ; |
143 | else { |
144 | UnfoldClusters(Dl, emcIn, emcRecPoint, Nmax, maxAt, maxAtEnergy, emcOut) ; |
145 | emcIn->Remove(emcRecPoint); |
146 | emcIn->Compress() ; |
147 | NemcUnfolded-- ; |
148 | index-- ; |
149 | } |
150 | } |
151 | emcStopedAt = index ; |
152 | |
153 | for(index = ppsdStopedAt; index < ppsdIn->GetEntries(); index++){ |
154 | ppsdRecPoint = (AliPHOSPpsdRecPoint *) (*ppsdIn)[index] ; |
155 | if(ppsdRecPoint->GetPHOSMod() != PHOSMod ) break ; |
156 | if(ppsdRecPoint->GetUp() ) |
157 | ppsdOutUp->Add(ppsdRecPoint) ; |
158 | else |
159 | ppsdOutLow->Add(ppsdRecPoint) ; |
160 | } |
161 | ppsdStopedAt = index ; |
162 | |
163 | PHOSMod ++ ; |
164 | |
165 | emcOut->Sort() ; |
166 | ppsdOutUp->Sort() ; |
167 | ppsdOutLow->Sort() ; |
168 | |
169 | } |
170 | //____________________________________________________________________________ |
171 | Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * EmcClu,AliPHOSPpsdRecPoint * PpsdClu, Bool_t &TooFar) |
172 | { |
173 | Float_t R = fR0 ; |
174 | |
175 | TVector3 vecEmc ; |
176 | TVector3 vecPpsd ; |
177 | |
178 | EmcClu->GetLocalPosition(vecEmc) ; |
179 | PpsdClu->GetLocalPosition(vecPpsd) ; |
180 | if(EmcClu->GetPHOSMod() == PpsdClu->GetPHOSMod()){ |
181 | if(vecPpsd.X() >= vecEmc.X() - fDelta ){ |
182 | if(vecPpsd.Z() >= vecEmc.Z() - fDelta ){ |
183 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
184 | //Correct to difference in CPV and EMC position due to different distance to center. |
185 | //we assume, that particle moves from center |
186 | Float_t DCPV = geom->GetIPtoOuterCoverDistance(); |
187 | Float_t DEMC = geom->GetIPtoCrystalSurface() ; |
188 | DEMC = DEMC / DCPV ; |
189 | vecPpsd = DEMC * vecPpsd - vecEmc ; |
190 | R = vecPpsd.Mag() ; |
191 | } // if zPpsd >= zEmc - fDelta |
192 | TooFar = kFALSE ; |
193 | } // if xPpsd >= xEmc - fDelta |
194 | else |
195 | TooFar = kTRUE ; |
196 | } |
197 | else |
198 | TooFar = kTRUE ; |
199 | |
200 | return R ; |
201 | } |
202 | |
203 | //____________________________________________________________________________ |
204 | void AliPHOSTrackSegmentMakerv1::MakeLinks(TObjArray * EmcRecPoints, TObjArray * PpsdRecPointsUp, |
205 | TObjArray * PpsdRecPointsLow, TClonesArray * LinkLowArray, |
206 | TClonesArray *LinkUpArray) |
207 | { |
208 | //Finds distanses (links) between all EMC and PPSD clusters, which are not further from each other than fR0 |
209 | |
210 | TIter nextEmc(EmcRecPoints) ; |
211 | Int_t iEmcClu = 0 ; |
212 | |
213 | AliPHOSPpsdRecPoint * PpsdLow ; |
214 | AliPHOSPpsdRecPoint * PpsdUp ; |
215 | AliPHOSEmcRecPoint * EmcClu ; |
216 | |
217 | Int_t iLinkLow = 0 ; |
218 | Int_t iLinkUp = 0 ; |
219 | |
220 | while( (EmcClu = (AliPHOSEmcRecPoint*)nextEmc() ) ) { |
221 | Bool_t TooFar ; |
222 | TIter nextPpsdLow(PpsdRecPointsLow ) ; |
223 | Int_t iPpsdLow = 0 ; |
224 | |
225 | while( (PpsdLow = (AliPHOSPpsdRecPoint*)nextPpsdLow() ) ) { |
226 | Float_t R = GetDistanceInPHOSPlane(EmcClu, PpsdLow, TooFar) ; |
227 | |
228 | if(TooFar) |
229 | break ; |
230 | if(R < fR0) |
231 | new( (*LinkLowArray)[iLinkLow++]) AliPHOSLink(R, iEmcClu, iPpsdLow) ; |
232 | |
233 | iPpsdLow++ ; |
234 | |
235 | } |
236 | |
237 | TIter nextPpsdUp(PpsdRecPointsUp ) ; |
238 | Int_t iPpsdUp = 0 ; |
239 | |
240 | while( (PpsdUp = (AliPHOSPpsdRecPoint*)nextPpsdUp() ) ) { |
241 | Float_t R = GetDistanceInPHOSPlane(EmcClu, PpsdUp, TooFar) ; |
242 | |
243 | if(TooFar) |
244 | break ; |
245 | if(R < fR0) |
246 | new( (*LinkUpArray)[iLinkUp++]) AliPHOSLink(R, iEmcClu, iPpsdUp) ; |
247 | |
248 | iPpsdUp++ ; |
249 | |
250 | } |
251 | |
252 | iEmcClu++ ; |
253 | |
254 | } // while nextEmC |
255 | |
256 | LinkLowArray->Sort() ; //first links with smallest distances |
257 | LinkUpArray->Sort() ; |
258 | } |
259 | |
260 | //____________________________________________________________________________ |
261 | void AliPHOSTrackSegmentMakerv1::MakePairs(TObjArray * EmcRecPoints, TObjArray * PpsdRecPointsUp, |
262 | TObjArray * PpsdRecPointsLow, TClonesArray * LinkLowArray, |
263 | TClonesArray * LinkUpArray, TrackSegmentsList * trsl) |
264 | { // Finds the smallest links and makes pairs of PPSD and EMC clusters with smallest distance |
265 | TIter nextLow(LinkLowArray) ; |
266 | TIter nextUp(LinkUpArray) ; |
267 | |
268 | AliPHOSLink * linkLow ; |
269 | AliPHOSLink * linkUp ; |
270 | |
271 | AliPHOSEmcRecPoint * emc ; |
272 | AliPHOSPpsdRecPoint * ppsdLow ; |
273 | AliPHOSPpsdRecPoint * ppsdUp ; |
274 | |
275 | while ( (linkLow = (AliPHOSLink *)nextLow() ) ){ |
276 | emc = (AliPHOSEmcRecPoint *) EmcRecPoints->At(linkLow->GetEmc()) ; |
277 | ppsdLow = (AliPHOSPpsdRecPoint *) PpsdRecPointsLow->At(linkLow->GetPpsd()) ; |
278 | if((emc)&&(ppsdLow)){ // RecPoints not removed yet |
279 | ppsdUp = 0 ; |
280 | |
281 | while ( (linkUp = (AliPHOSLink *)nextUp() ) ){ |
282 | if(linkLow->GetEmc() == linkUp->GetEmc() ){ |
283 | ppsdUp = (AliPHOSPpsdRecPoint *) PpsdRecPointsUp->At(linkUp->GetPpsd()) ; |
284 | break ; |
285 | } |
286 | |
287 | } // while nextUp |
288 | |
289 | nextUp.Reset(); |
290 | AliPHOSTrackSegment * subtr = new AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ; |
291 | trsl->Add(subtr) ; |
292 | EmcRecPoints->RemoveAt(linkLow->GetEmc()) ; |
293 | PpsdRecPointsLow->RemoveAt(linkLow->GetPpsd()) ; |
294 | |
295 | if(ppsdUp) |
296 | PpsdRecPointsUp->RemoveAt(linkUp->GetPpsd()) ; |
297 | |
298 | } // if NLocMax |
299 | } |
300 | |
301 | TIter nextEmc(EmcRecPoints) ; |
302 | nextEmc.Reset() ; |
303 | |
304 | while( (emc = (AliPHOSEmcRecPoint*)nextEmc()) ){ //to create pairs if no PpsdLow |
305 | ppsdLow = NULL ; |
306 | ppsdUp = NULL ; |
307 | |
308 | while ( (linkUp = (AliPHOSLink *)nextUp() ) ){ |
309 | |
310 | if(EmcRecPoints->IndexOf(emc) == linkUp->GetEmc() ){ |
311 | ppsdUp = (AliPHOSPpsdRecPoint *) PpsdRecPointsUp->At(linkUp->GetPpsd()) ; |
312 | break ; |
313 | } |
314 | |
315 | } |
316 | AliPHOSTrackSegment * subtr = new AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ; |
317 | trsl->Add(subtr) ; |
318 | |
319 | if(ppsdUp) |
320 | PpsdRecPointsUp->RemoveAt(linkUp->GetPpsd()) ; |
321 | |
322 | } |
323 | |
324 | } |
325 | |
326 | //____________________________________________________________________________ |
327 | void AliPHOSTrackSegmentMakerv1::MakeTrackSegments(DigitsList * DL, RecPointsList * emcl, |
328 | RecPointsList * ppsdl, TrackSegmentsList * trsl) |
329 | { |
330 | //main function, does the job |
331 | |
332 | Int_t PHOSMod = 1 ; |
333 | Int_t emcStopedAt = 0 ; |
334 | Int_t ppsdStopedAt = 0 ; |
335 | |
336 | TObjArray * EmcRecPoints = new TObjArray(100) ; //these arrays keeps pointers |
337 | TObjArray * PpsdRecPointsUp = new TObjArray(100) ; //on RecPoints, which are |
338 | TObjArray * PpsdRecPointsLow = new TObjArray(100) ; //kept in TClonesArray's emcl and ppsdl |
339 | |
340 | |
341 | TClonesArray * LinkLowArray = new TClonesArray("AliPHOSLink", 100); |
342 | TClonesArray * LinkUpArray = new TClonesArray("AliPHOSLink", 100); |
343 | |
344 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
345 | |
346 | while(PHOSMod <= geom->GetNModules() ){ |
347 | |
348 | FillOneModule(DL, emcl, EmcRecPoints, ppsdl, PpsdRecPointsUp, PpsdRecPointsLow, PHOSMod , emcStopedAt, ppsdStopedAt) ; |
349 | |
350 | MakeLinks(EmcRecPoints,PpsdRecPointsUp, PpsdRecPointsLow, LinkLowArray, LinkUpArray) ; |
351 | |
352 | MakePairs(EmcRecPoints,PpsdRecPointsUp, PpsdRecPointsLow, LinkLowArray, LinkUpArray, trsl) ; |
353 | |
354 | EmcRecPoints->Clear() ; |
355 | PpsdRecPointsUp->Clear() ; |
356 | PpsdRecPointsLow->Clear() ; |
357 | LinkUpArray->Delete(); |
358 | LinkLowArray->Delete(); |
359 | } |
360 | } |
361 | |
362 | //____________________________________________________________________________ |
363 | Double_t AliPHOSTrackSegmentMakerv1::ShowerShape(Double_t r){ |
364 | // If you change this function, change also gradiend evaluation in ChiSquare() |
365 | Double_t r4 = r*r*r*r ; |
366 | Double_t r295 = TMath::Power(r, 2.95) ; |
367 | Double_t shape = TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ; |
368 | return shape ; |
369 | } |
370 | |
371 | //____________________________________________________________________________ |
372 | void AliPHOSTrackSegmentMakerv1::UnfoldClusters(DigitsList * DL, RecPointsList * emcIn, AliPHOSEmcRecPoint * iniEmc, |
373 | Int_t Nmax, int * maxAt, Float_t * maxAtEnergy, TObjArray * emcList) |
374 | { |
375 | //fits cluster with Nmax overlapping showers |
376 | |
377 | Int_t NPar = 3 * Nmax ; |
378 | Float_t FitParameters[NPar] ; |
379 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
380 | |
381 | if( !FindFit(iniEmc, maxAt, maxAtEnergy, NPar, FitParameters) ) //Fit failed, return and remove cluster |
382 | return ; |
383 | |
384 | Float_t xDigit ; |
385 | Float_t zDigit ; |
386 | Int_t RelId[4] ; |
387 | |
388 | Int_t Ndigits = iniEmc->GetMultiplicity() ; |
389 | Float_t xpar ; |
390 | Float_t zpar ; |
391 | Float_t Epar ; |
392 | Float_t Distance ; |
393 | Float_t Ratio ; |
394 | Float_t Efit[Ndigits] ; |
395 | Int_t iparam ; |
396 | Int_t iDigit ; |
397 | |
398 | AliPHOSDigit * digit ; |
399 | AliPHOSEmcRecPoint * emcRP ; |
400 | int * emcDigits = iniEmc->GetDigitsList() ; |
401 | Float_t * emcEnergies = iniEmc->GetEnergiesList() ; |
402 | |
403 | Int_t iRecPoint = emcIn->GetEntries() ; |
404 | |
405 | for(iDigit = 0 ; iDigit < Ndigits ; iDigit ++){ |
406 | digit = (AliPHOSDigit *) emcDigits[iDigit]; |
407 | geom->AbsToRelNumbering(digit->GetId(), RelId) ; |
408 | geom->RelPosInModule(RelId, xDigit, zDigit) ; |
409 | Efit[iDigit] = 0; |
410 | iparam = 0 ; |
411 | |
412 | while(iparam < NPar ){ |
413 | xpar = FitParameters[iparam] ; |
414 | zpar = FitParameters[iparam+1] ; |
415 | Epar = FitParameters[iparam+2] ; |
416 | iparam += 3 ; |
417 | Distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ; |
418 | Distance = TMath::Sqrt(Distance) ; |
419 | Efit[iDigit] += Epar * ShowerShape(Distance) ; |
420 | } |
421 | |
422 | } |
423 | |
424 | iparam = 0 ; |
425 | Float_t eDigit ; |
426 | |
427 | while(iparam < NPar ){ |
428 | xpar = FitParameters[iparam] ; |
429 | zpar = FitParameters[iparam+1] ; |
430 | Epar = FitParameters[iparam+2] ; |
431 | iparam += 3 ; |
432 | new ((*emcIn)[iRecPoint]) AliPHOSEmcRecPoint( iniEmc->GetLogWeightCut(), iniEmc->GetLocMaxCut() ) ; |
433 | emcRP = (AliPHOSEmcRecPoint *) emcIn->At(iRecPoint++); |
434 | |
435 | for(iDigit = 0 ; iDigit < Ndigits ; iDigit ++){ |
436 | digit = (AliPHOSDigit *) emcDigits[iDigit]; |
437 | geom->AbsToRelNumbering(digit->GetId(), RelId) ; |
438 | geom->RelPosInModule(RelId, xDigit, zDigit) ; |
439 | Distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ; |
440 | Distance = TMath::Sqrt(Distance) ; |
441 | Ratio = Epar * ShowerShape(Distance) / Efit[iDigit] ; |
442 | eDigit = emcEnergies[iDigit] * Ratio ; |
443 | emcRP->AddDigit( *digit,eDigit ) ; |
444 | } |
445 | |
446 | emcList->Add(emcRP) ; |
447 | |
448 | } |
449 | } |
450 | //______________________________________________________________________________ |
451 | void AliPHOSTrackSegmentMakerv1::UnfoldingChiSquare(Int_t &NPar, Double_t *Grad, Double_t & fret, Double_t *x, Int_t iflag) |
452 | { |
453 | // NUmber of paramters, Gradient , Chi squared, parameters, what to do |
454 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; |
455 | AliPHOSTrackSegmentMakerv1 TrS ; |
456 | |
457 | AliPHOSEmcRecPoint * emcRP = (AliPHOSEmcRecPoint *) gMinuit->GetObjectFit() ; //EmcRecPoint to fit |
458 | int * emcDigits = emcRP->GetDigitsList() ; |
459 | Float_t * emcEnergies = emcRP->GetEnergiesList() ; |
460 | fret = 0. ; |
461 | Int_t iparam ; |
462 | |
463 | if(iflag==2) |
464 | for(iparam = 0 ; iparam < NPar ; iparam ++) |
465 | Grad[iparam] = 0 ; //Will evaluate gradient |
466 | |
467 | Double_t Efit ; |
468 | |
469 | AliPHOSDigit * digit ; |
470 | Int_t iDigit = 0 ; |
471 | while ( (digit = (AliPHOSDigit *)emcDigits[iDigit] )){ |
472 | Int_t RelId[4] ; |
473 | Float_t xDigit ; |
474 | Float_t zDigit ; |
475 | geom->AbsToRelNumbering(digit->GetId(), RelId) ; |
476 | geom->RelPosInModule(RelId, xDigit, zDigit) ; |
477 | |
478 | if(iflag == 2){ //calculate gradient |
479 | Int_t iParam = 0 ; |
480 | Efit = 0 ; |
481 | while(iParam < NPar ){ |
482 | Double_t Distance = TMath::Sqrt( (xDigit - x[iParam]) * (xDigit - x[iParam]) + |
483 | (zDigit - x[++iParam]) * (zDigit - x[iParam]) ) ; |
484 | Efit += x[++iParam] * TrS.ShowerShape(Distance) ; |
485 | iParam++ ; |
486 | } |
487 | Double_t sum = 2. * (Efit - emcEnergies[iDigit]) / emcEnergies[iDigit] ; //Here we assume, that sigma = sqrt(E) |
488 | iParam = 0 ; |
489 | while(iParam < NPar ){ |
490 | Double_t xpar = x[iParam] ; |
491 | Double_t zpar = x[iParam+1] ; |
492 | Double_t Epar = x[iParam+2] ; |
493 | Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ); |
494 | Double_t shape = sum * TrS.ShowerShape(dr) ; |
495 | Double_t r4 = dr*dr*dr*dr ; |
496 | Double_t r295 = TMath::Power(dr,2.95) ; |
497 | Double_t deriv =-4. * dr*dr * ( 2.32 / ( (2.32 + 0.26 * r4) * (2.32 + 0.26 * r4) ) + |
498 | 0.0316 * (1. + 0.0171 * r295) / ( ( 1. + 0.0652 * r295) * (1. + 0.0652 * r295) ) ) ; |
499 | |
500 | Grad[iParam++] += Epar * shape * deriv * (xpar - xDigit) ; // Derivative over x |
501 | Grad[iParam++] += Epar * shape * deriv * (zpar - zDigit) ; // Derivative over z |
502 | Grad[iParam++] += shape ; // Derivative over energy |
503 | } |
504 | } |
505 | Efit = 0; |
506 | iparam = 0 ; |
507 | while(iparam < NPar ){ |
508 | Double_t xpar = x[iparam] ; |
509 | Double_t zpar = x[iparam+1] ; |
510 | Double_t Epar = x[iparam+2] ; |
511 | iparam += 3 ; |
512 | Double_t Distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ; |
513 | Distance = TMath::Sqrt(Distance) ; |
514 | Efit += Epar * TrS.ShowerShape(Distance) ; |
515 | } |
516 | fret += (Efit-emcEnergies[iDigit])*(Efit-emcEnergies[iDigit])/emcEnergies[iDigit] ; |
517 | //Here we assume, that sigma = sqrt(E) |
518 | iDigit++ ; |
519 | } |
520 | } |