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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" | |
98cbd830 | 39 | #include "AliPHOSIndexToObject.h" |
d15a28e7 | 40 | #include "AliPHOSTrackSegment.h" |
41 | #include "AliPHOSLink.h" | |
42 | #include "AliPHOSv0.h" | |
43 | #include "AliRun.h" | |
44 | ||
92862013 | 45 | extern void UnfoldingChiSquare(Int_t &nPar, Double_t *Grad, Double_t & fret, Double_t *x, Int_t iflag) ; |
9f616d61 | 46 | |
d15a28e7 | 47 | ClassImp( AliPHOSTrackSegmentMakerv1) |
48 | ||
49 | ||
50 | //____________________________________________________________________________ | |
b2a60966 | 51 | AliPHOSTrackSegmentMakerv1::AliPHOSTrackSegmentMakerv1() : AliPHOSTrackSegmentMaker() |
d15a28e7 | 52 | { |
9f616d61 | 53 | // ctor |
b2a60966 | 54 | |
d15a28e7 | 55 | fR0 = 4. ; |
d15a28e7 | 56 | //clusters are sorted in "rows" and "columns" of width geom->GetCrystalSize(0), |
98cbd830 | 57 | fDelta = fR0 + fGeom->GetCrystalSize(0) ; |
6727be7e | 58 | fMinuit = new TMinuit(100) ; |
59 | fUnfoldFlag = kTRUE ; | |
d15a28e7 | 60 | } |
61 | ||
9f616d61 | 62 | //____________________________________________________________________________ |
63 | AliPHOSTrackSegmentMakerv1::~AliPHOSTrackSegmentMakerv1() | |
64 | { | |
65 | // dtor | |
b2a60966 | 66 | |
67 | delete fMinuit ; | |
9f616d61 | 68 | } |
b2a60966 | 69 | |
d15a28e7 | 70 | //____________________________________________________________________________ |
71 | Bool_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 | |
9f616d61 | 76 | gMinuit->SetPrintLevel(-1) ; // No Printout |
77 | gMinuit->SetFCN(UnfoldingChiSquare) ; // To set the address of the minimization function | |
78 | gMinuit->SetObjectFit(emcRP) ; // To tranfer pointer to UnfoldingChiSquare | |
79 | ||
80 | // filling initial values for fit parameters | |
d15a28e7 | 81 | AliPHOSDigit * digit ; |
9f616d61 | 82 | |
83 | Int_t ierflg = 0; | |
84 | Int_t index = 0 ; | |
92862013 | 85 | Int_t nDigits = (Int_t) nPar / 3 ; |
9f616d61 | 86 | |
d15a28e7 | 87 | Int_t iDigit ; |
9f616d61 | 88 | |
89 | ||
92862013 | 90 | for(iDigit = 0; iDigit < nDigits; iDigit++){ |
d15a28e7 | 91 | digit = (AliPHOSDigit *) maxAt[iDigit]; |
92 | ||
92862013 | 93 | Int_t relid[4] ; |
d15a28e7 | 94 | Float_t x ; |
95 | Float_t z ; | |
98cbd830 | 96 | fGeom->AbsToRelNumbering(digit->GetId(), relid) ; |
97 | fGeom->RelPosInModule(relid, x, z) ; | |
d15a28e7 | 98 | |
92862013 | 99 | Float_t energy = maxAtEnergy[iDigit] ; |
d15a28e7 | 100 | |
9f616d61 | 101 | gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ; |
102 | index++ ; | |
d15a28e7 | 103 | if(ierflg != 0){ |
104 | cout << "PHOS Unfolding> Unable to set initial value for fit procedure : x = " << x << endl ; | |
105 | return kFALSE; | |
106 | } | |
9f616d61 | 107 | gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ; |
108 | index++ ; | |
d15a28e7 | 109 | if(ierflg != 0){ |
110 | cout << "PHOS Unfolding> Unable to set initial value for fit procedure : z = " << z << endl ; | |
111 | return kFALSE; | |
112 | } | |
92862013 | 113 | gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ; |
9f616d61 | 114 | index++ ; |
d15a28e7 | 115 | if(ierflg != 0){ |
92862013 | 116 | cout << "PHOS Unfolding> Unable to set initial value for fit procedure : energy = " << energy << endl ; |
d15a28e7 | 117 | return kFALSE; |
6ad0bfa0 | 118 | } |
d15a28e7 | 119 | } |
120 | ||
9f616d61 | 121 | Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ; The number of function call slightly |
122 | // depends on it. | |
123 | Double_t p1 = 1.0 ; | |
124 | Double_t p2 = 0.0 ; | |
125 | ||
126 | gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TgMinuit to reduce function calls | |
127 | gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient | |
d15a28e7 | 128 | gMinuit->SetMaxIterations(5); |
9f616d61 | 129 | gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings |
98cbd830 | 130 | |
9f616d61 | 131 | gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize |
98cbd830 | 132 | |
9f616d61 | 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 | } |
98cbd830 | 143 | |
d15a28e7 | 144 | return kTRUE; |
9f616d61 | 145 | |
d15a28e7 | 146 | } |
9f616d61 | 147 | |
d15a28e7 | 148 | //____________________________________________________________________________ |
98cbd830 | 149 | void AliPHOSTrackSegmentMakerv1::FillOneModule(AliPHOSRecPoint::RecPointsList * emcIn, |
88714635 | 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 | { |
98cbd830 | 158 | // Fill xxxOut arrays with clusters from one PHOS module |
9f616d61 | 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++){ | |
6ad0bfa0 | 166 | |
98cbd830 | 167 | emcRecPoint = (AliPHOSEmcRecPoint *) emcIn->At(index) ; |
9f616d61 | 168 | |
98cbd830 | 169 | if(emcRecPoint->GetPHOSMod() != phosmod ) |
170 | break ; | |
31aa6d6c | 171 | |
98cbd830 | 172 | emcOut->Add(emcRecPoint) ; |
d15a28e7 | 173 | } |
174 | emcStopedAt = index ; | |
175 | ||
176 | for(index = ppsdStopedAt; index < ppsdIn->GetEntries(); index++){ | |
83974468 | 177 | ppsdRecPoint = (AliPHOSPpsdRecPoint *) ppsdIn->At(index) ; |
92862013 | 178 | if(ppsdRecPoint->GetPHOSMod() != phosmod ) |
9f616d61 | 179 | break ; |
d15a28e7 | 180 | if(ppsdRecPoint->GetUp() ) |
181 | ppsdOutUp->Add(ppsdRecPoint) ; | |
182 | else | |
183 | ppsdOutLow->Add(ppsdRecPoint) ; | |
184 | } | |
185 | ppsdStopedAt = index ; | |
6ad0bfa0 | 186 | |
d15a28e7 | 187 | emcOut->Sort() ; |
188 | ppsdOutUp->Sort() ; | |
6ad0bfa0 | 189 | ppsdOutLow->Sort() ; |
d15a28e7 | 190 | } |
191 | //____________________________________________________________________________ | |
92862013 | 192 | Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcclu,AliPHOSPpsdRecPoint * PpsdClu, Bool_t &toofar) |
d15a28e7 | 193 | { |
b2a60966 | 194 | // Calculates the distance between the EMC RecPoint and the PPSD RecPoint |
195 | ||
92862013 | 196 | Float_t r = fR0 ; |
d15a28e7 | 197 | |
198 | TVector3 vecEmc ; | |
199 | TVector3 vecPpsd ; | |
200 | ||
92862013 | 201 | emcclu->GetLocalPosition(vecEmc) ; |
d15a28e7 | 202 | PpsdClu->GetLocalPosition(vecPpsd) ; |
92862013 | 203 | if(emcclu->GetPHOSMod() == PpsdClu->GetPHOSMod()){ |
d15a28e7 | 204 | if(vecPpsd.X() >= vecEmc.X() - fDelta ){ |
205 | if(vecPpsd.Z() >= vecEmc.Z() - fDelta ){ | |
6ad0bfa0 | 206 | // Correct to difference in CPV and EMC position due to different distance to center. |
207 | // we assume, that particle moves from center | |
98cbd830 | 208 | Float_t dCPV = fGeom->GetIPtoOuterCoverDistance(); |
209 | Float_t dEMC = fGeom->GetIPtoCrystalSurface() ; | |
92862013 | 210 | dEMC = dEMC / dCPV ; |
211 | vecPpsd = dEMC * vecPpsd - vecEmc ; | |
212 | r = vecPpsd.Mag() ; | |
d15a28e7 | 213 | } // if zPpsd >= zEmc - fDelta |
92862013 | 214 | toofar = kFALSE ; |
d15a28e7 | 215 | } // if xPpsd >= xEmc - fDelta |
216 | else | |
92862013 | 217 | toofar = kTRUE ; |
d15a28e7 | 218 | } |
219 | else | |
92862013 | 220 | toofar = kTRUE ; |
d15a28e7 | 221 | |
92862013 | 222 | return r ; |
d15a28e7 | 223 | } |
224 | ||
225 | //____________________________________________________________________________ | |
92862013 | 226 | void AliPHOSTrackSegmentMakerv1::MakeLinks(TObjArray * emcRecPoints, TObjArray * ppsdRecPointsUp, |
227 | TObjArray * ppsdRecPointsLow, TClonesArray * linklowArray, | |
228 | TClonesArray *linkupArray) | |
d15a28e7 | 229 | { |
b2a60966 | 230 | // Finds distances (links) between all EMC and PPSD clusters, which are not further apart from each other than fR0 |
231 | ||
92862013 | 232 | TIter nextEmc(emcRecPoints) ; |
d15a28e7 | 233 | Int_t iEmcClu = 0 ; |
234 | ||
92862013 | 235 | AliPHOSPpsdRecPoint * ppsdlow ; |
236 | AliPHOSPpsdRecPoint * ppsdup ; | |
237 | AliPHOSEmcRecPoint * emcclu ; | |
d15a28e7 | 238 | |
239 | Int_t iLinkLow = 0 ; | |
240 | Int_t iLinkUp = 0 ; | |
241 | ||
92862013 | 242 | while( (emcclu = (AliPHOSEmcRecPoint*)nextEmc() ) ) { |
243 | Bool_t toofar ; | |
244 | TIter nextPpsdLow(ppsdRecPointsLow ) ; | |
d15a28e7 | 245 | Int_t iPpsdLow = 0 ; |
246 | ||
92862013 | 247 | while( (ppsdlow = (AliPHOSPpsdRecPoint*)nextPpsdLow() ) ) { |
248 | Float_t r = GetDistanceInPHOSPlane(emcclu, ppsdlow, toofar) ; | |
d15a28e7 | 249 | |
92862013 | 250 | if(toofar) |
d15a28e7 | 251 | break ; |
83974468 | 252 | if(r < fR0){ |
92862013 | 253 | new( (*linklowArray)[iLinkLow++]) AliPHOSLink(r, iEmcClu, iPpsdLow) ; |
83974468 | 254 | } |
d15a28e7 | 255 | iPpsdLow++ ; |
256 | ||
257 | } | |
258 | ||
92862013 | 259 | TIter nextPpsdUp(ppsdRecPointsUp ) ; |
d15a28e7 | 260 | Int_t iPpsdUp = 0 ; |
261 | ||
92862013 | 262 | while( (ppsdup = (AliPHOSPpsdRecPoint*)nextPpsdUp() ) ) { |
263 | Float_t r = GetDistanceInPHOSPlane(emcclu, ppsdup, toofar) ; | |
d15a28e7 | 264 | |
92862013 | 265 | if(toofar) |
d15a28e7 | 266 | break ; |
83974468 | 267 | if(r < fR0) { |
92862013 | 268 | new( (*linkupArray)[iLinkUp++]) AliPHOSLink(r, iEmcClu, iPpsdUp) ; |
83974468 | 269 | } |
d15a28e7 | 270 | iPpsdUp++ ; |
271 | ||
272 | } | |
273 | ||
274 | iEmcClu++ ; | |
275 | ||
276 | } // while nextEmC | |
277 | ||
92862013 | 278 | linklowArray->Sort() ; //first links with smallest distances |
279 | linkupArray->Sort() ; | |
d15a28e7 | 280 | } |
281 | ||
282 | //____________________________________________________________________________ | |
88714635 | 283 | void AliPHOSTrackSegmentMakerv1::MakePairs(TObjArray * emcRecPoints, |
284 | TObjArray * ppsdRecPointsUp, | |
285 | TObjArray * ppsdRecPointsLow, | |
286 | TClonesArray * linklowArray, | |
287 | TClonesArray * linkupArray, | |
288 | AliPHOSTrackSegment::TrackSegmentsList * trsl) | |
6ad0bfa0 | 289 | { |
290 | ||
291 | // Finds the smallest links and makes pairs of PPSD and EMC clusters with smallest distance | |
292 | ||
92862013 | 293 | TIter nextLow(linklowArray) ; |
294 | TIter nextUp(linkupArray) ; | |
d15a28e7 | 295 | |
296 | AliPHOSLink * linkLow ; | |
297 | AliPHOSLink * linkUp ; | |
298 | ||
299 | AliPHOSEmcRecPoint * emc ; | |
300 | AliPHOSPpsdRecPoint * ppsdLow ; | |
301 | AliPHOSPpsdRecPoint * ppsdUp ; | |
302 | ||
92862013 | 303 | AliPHOSRecPoint * nullpointer = 0 ; |
9f616d61 | 304 | |
d15a28e7 | 305 | while ( (linkLow = (AliPHOSLink *)nextLow() ) ){ |
92862013 | 306 | emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(linkLow->GetEmc()) ; |
307 | ppsdLow = (AliPHOSPpsdRecPoint *) ppsdRecPointsLow->At(linkLow->GetPpsd()) ; | |
6ad0bfa0 | 308 | if( (emc) && (ppsdLow) ){ // RecPoints not removed yet |
d15a28e7 | 309 | ppsdUp = 0 ; |
310 | ||
311 | while ( (linkUp = (AliPHOSLink *)nextUp() ) ){ | |
312 | if(linkLow->GetEmc() == linkUp->GetEmc() ){ | |
92862013 | 313 | ppsdUp = (AliPHOSPpsdRecPoint *) ppsdRecPointsUp->At(linkUp->GetPpsd()) ; |
d15a28e7 | 314 | break ; |
315 | } | |
316 | ||
317 | } // while nextUp | |
318 | ||
319 | nextUp.Reset(); | |
b2a60966 | 320 | // AliPHOSTrackSegment * subtr = new AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ; |
32d0941d | 321 | // trsl->Add(subtr) ; |
322 | fNTrackSegments = trsl->GetEntries() ; | |
b2a60966 | 323 | new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ; |
324 | fNTrackSegments++ ; | |
92862013 | 325 | emcRecPoints->AddAt(nullpointer,linkLow->GetEmc()) ; |
326 | ppsdRecPointsLow->AddAt(nullpointer,linkLow->GetPpsd()) ; | |
d15a28e7 | 327 | |
328 | if(ppsdUp) | |
92862013 | 329 | ppsdRecPointsUp->AddAt(nullpointer,linkUp->GetPpsd()) ; |
d15a28e7 | 330 | |
6ad0bfa0 | 331 | } |
d15a28e7 | 332 | } |
333 | ||
92862013 | 334 | TIter nextEmc(emcRecPoints) ; |
d15a28e7 | 335 | nextEmc.Reset() ; |
336 | ||
92862013 | 337 | while( (emc = (AliPHOSEmcRecPoint*)nextEmc()) ){ //to create pairs if no ppsdlow |
9f616d61 | 338 | ppsdLow = 0 ; |
339 | ppsdUp = 0 ; | |
d15a28e7 | 340 | |
341 | while ( (linkUp = (AliPHOSLink *)nextUp() ) ){ | |
342 | ||
92862013 | 343 | if(emcRecPoints->IndexOf(emc) == linkUp->GetEmc() ){ |
344 | ppsdUp = (AliPHOSPpsdRecPoint *) ppsdRecPointsUp->At(linkUp->GetPpsd()) ; | |
d15a28e7 | 345 | break ; |
346 | } | |
347 | ||
348 | } | |
98cbd830 | 349 | |
32d0941d | 350 | fNTrackSegments = trsl->GetEntries() ; |
b2a60966 | 351 | new( (*trsl)[fNTrackSegments] ) AliPHOSTrackSegment(emc, ppsdUp, ppsdLow ) ; |
352 | fNTrackSegments++ ; | |
353 | ||
354 | ||
d15a28e7 | 355 | if(ppsdUp) |
92862013 | 356 | ppsdRecPointsUp->AddAt(nullpointer,linkUp->GetPpsd()) ; |
d15a28e7 | 357 | } |
358 | ||
359 | } | |
360 | ||
361 | //____________________________________________________________________________ | |
88714635 | 362 | void AliPHOSTrackSegmentMakerv1::MakeTrackSegments(DigitsList * dl, |
363 | AliPHOSRecPoint::RecPointsList * emcl, | |
364 | AliPHOSRecPoint::RecPointsList * ppsdl, | |
365 | AliPHOSTrackSegment::TrackSegmentsList * trsl) | |
d15a28e7 | 366 | { |
b2a60966 | 367 | // Makes the track segments out of the list of EMC and PPSD Recpoints and stores them in a list |
98cbd830 | 368 | |
92862013 | 369 | Int_t phosmod = 1 ; |
9f616d61 | 370 | Int_t emcStopedAt = 0 ; |
d15a28e7 | 371 | Int_t ppsdStopedAt = 0 ; |
372 | ||
92862013 | 373 | TObjArray * emcRecPoints = new TObjArray(100) ; // these arrays keep pointers |
374 | TObjArray * ppsdRecPointsUp = new TObjArray(100) ; // to RecPoints, which are | |
375 | TObjArray * ppsdRecPointsLow = new TObjArray(100) ; // kept in TClonesArray's emcl and ppsdl | |
d15a28e7 | 376 | |
377 | ||
92862013 | 378 | TClonesArray * linklowArray = new TClonesArray("AliPHOSLink", 100); |
379 | TClonesArray * linkupArray = new TClonesArray("AliPHOSLink", 100); | |
6ad0bfa0 | 380 | |
98cbd830 | 381 | if(fUnfoldFlag){ |
382 | UnfoldAll(dl, emcl) ; // Unfolds all EMC clusters | |
383 | } | |
d15a28e7 | 384 | |
98cbd830 | 385 | while(phosmod <= fGeom->GetNModules() ){ |
386 | ||
387 | FillOneModule(emcl, emcRecPoints, ppsdl, ppsdRecPointsUp, ppsdRecPointsLow, phosmod, emcStopedAt, ppsdStopedAt) ; | |
388 | ||
389 | MakeLinks(emcRecPoints, ppsdRecPointsUp, ppsdRecPointsLow, linklowArray, linkupArray) ; | |
390 | ||
92862013 | 391 | MakePairs(emcRecPoints, ppsdRecPointsUp, ppsdRecPointsLow, linklowArray, linkupArray, trsl) ; |
98cbd830 | 392 | |
92862013 | 393 | emcRecPoints->Clear() ; |
98cbd830 | 394 | |
92862013 | 395 | ppsdRecPointsUp->Clear() ; |
98cbd830 | 396 | |
92862013 | 397 | ppsdRecPointsLow->Clear() ; |
98cbd830 | 398 | |
92862013 | 399 | linkupArray->Clear() ; |
98cbd830 | 400 | |
92862013 | 401 | linklowArray->Clear() ; |
98cbd830 | 402 | |
92862013 | 403 | phosmod++ ; |
d15a28e7 | 404 | } |
92862013 | 405 | delete emcRecPoints ; |
406 | emcRecPoints = 0 ; | |
98cbd830 | 407 | |
92862013 | 408 | delete ppsdRecPointsUp ; |
409 | ppsdRecPointsUp = 0 ; | |
9f616d61 | 410 | |
92862013 | 411 | delete ppsdRecPointsLow ; |
412 | ppsdRecPointsLow = 0 ; | |
9f616d61 | 413 | |
92862013 | 414 | delete linkupArray ; |
415 | linkupArray = 0 ; | |
9f616d61 | 416 | |
92862013 | 417 | delete linklowArray ; |
418 | linklowArray = 0 ; | |
d15a28e7 | 419 | } |
420 | ||
421 | //____________________________________________________________________________ | |
9f616d61 | 422 | Double_t AliPHOSTrackSegmentMakerv1::ShowerShape(Double_t r) |
423 | { | |
b2a60966 | 424 | // Shape of the shower (see PHOS TDR) |
425 | // If you change this function, change also the gradien evaluation in ChiSquare() | |
426 | ||
6ad0bfa0 | 427 | Double_t r4 = r*r*r*r ; |
428 | Double_t r295 = TMath::Power(r, 2.95) ; | |
d15a28e7 | 429 | Double_t shape = TMath::Exp( -r4 * (1. / (2.32 + 0.26 * r4) + 0.0316 / (1 + 0.0652 * r295) ) ) ; |
430 | return shape ; | |
431 | } | |
432 | ||
98cbd830 | 433 | //____________________________________________________________________________ |
434 | void AliPHOSTrackSegmentMakerv1::UnfoldAll(DigitsList * dl, AliPHOSRecPoint::RecPointsList * emcIn) | |
435 | { | |
436 | // Performs unfolding of all EMC clusters, sorts them and resets indexes in RecPoints | |
437 | ||
438 | AliPHOSEmcRecPoint * emcRecPoint ; | |
439 | Int_t index ; | |
440 | Int_t nEmcUnfolded = emcIn->GetEntries() ; | |
441 | ||
442 | for(index = 0 ; index < nEmcUnfolded; index++){ | |
443 | ||
444 | emcRecPoint = (AliPHOSEmcRecPoint *) emcIn->At(index) ; | |
445 | ||
446 | Int_t nMultipl = emcRecPoint->GetMultiplicity() ; | |
447 | Int_t * maxAt = new Int_t[nMultipl] ; | |
448 | Float_t * maxAtEnergy = new Float_t[nMultipl] ; | |
449 | Int_t nMax = emcRecPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy) ; | |
450 | ||
451 | if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0 | |
452 | ||
453 | UnfoldClusters(dl, emcIn, emcRecPoint, nMax, maxAt, maxAtEnergy) ; | |
454 | emcIn->Remove(emcRecPoint); | |
455 | emcIn->Compress() ; | |
456 | index-- ; | |
457 | nEmcUnfolded-- ; | |
458 | } | |
459 | ||
460 | delete[] maxAt ; | |
461 | delete[] maxAtEnergy ; | |
462 | } //Unfolding finished | |
463 | ||
464 | emcIn->Sort() ; | |
465 | ||
466 | // to set index to new and correct index of old RecPoints | |
467 | for( index = 0 ; index < emcIn->GetEntriesFast() ; index++){ | |
468 | ||
469 | ((AliPHOSEmcRecPoint *) emcIn->At(index))->SetIndexInList(index) ; | |
470 | ||
471 | } | |
472 | ||
473 | } | |
d15a28e7 | 474 | //____________________________________________________________________________ |
88714635 | 475 | void AliPHOSTrackSegmentMakerv1::UnfoldClusters(DigitsList * dl, |
476 | AliPHOSRecPoint::RecPointsList * emcIn, | |
477 | AliPHOSEmcRecPoint * iniEmc, | |
478 | Int_t nMax, | |
479 | int * maxAt, | |
98cbd830 | 480 | Float_t * maxAtEnergy) |
d15a28e7 | 481 | { |
b2a60966 | 482 | // Performs the unfolding of a cluster with nMax overlapping showers |
483 | // This is time consuming (use the (Un)SetUnfolFlag() ) | |
484 | ||
92862013 | 485 | Int_t nPar = 3 * nMax ; |
31aa6d6c | 486 | Float_t * fitparameters = new Float_t[nPar] ; |
98cbd830 | 487 | |
9f616d61 | 488 | |
92862013 | 489 | Bool_t rv = FindFit(iniEmc, maxAt, maxAtEnergy, nPar, fitparameters) ; |
31aa6d6c | 490 | if( !rv ) { |
491 | // Fit failed, return and remove cluster | |
492 | delete[] fitparameters ; | |
d15a28e7 | 493 | return ; |
31aa6d6c | 494 | } |
98cbd830 | 495 | |
496 | ||
d15a28e7 | 497 | Float_t xDigit ; |
498 | Float_t zDigit ; | |
92862013 | 499 | Int_t relid[4] ; |
d15a28e7 | 500 | |
92862013 | 501 | Int_t nDigits = iniEmc->GetMultiplicity() ; |
d15a28e7 | 502 | Float_t xpar ; |
503 | Float_t zpar ; | |
92862013 | 504 | Float_t epar ; |
505 | Float_t distance ; | |
506 | Float_t ratio ; | |
31aa6d6c | 507 | Float_t * efit = new Float_t[nDigits] ; |
d15a28e7 | 508 | Int_t iparam ; |
509 | Int_t iDigit ; | |
510 | ||
511 | AliPHOSDigit * digit ; | |
512 | AliPHOSEmcRecPoint * emcRP ; | |
6ad0bfa0 | 513 | Int_t * emcDigits = iniEmc->GetDigitsList() ; |
d15a28e7 | 514 | Float_t * emcEnergies = iniEmc->GetEnergiesList() ; |
515 | ||
516 | Int_t iRecPoint = emcIn->GetEntries() ; | |
517 | ||
92862013 | 518 | for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){ |
98cbd830 | 519 | digit = fPlease->GimeDigit( emcDigits[iDigit] ) ; |
520 | fGeom->AbsToRelNumbering(digit->GetId(), relid) ; | |
521 | fGeom->RelPosInModule(relid, xDigit, zDigit) ; | |
92862013 | 522 | efit[iDigit] = 0; |
d15a28e7 | 523 | iparam = 0 ; |
524 | ||
92862013 | 525 | while(iparam < nPar ){ |
526 | xpar = fitparameters[iparam] ; | |
527 | zpar = fitparameters[iparam+1] ; | |
528 | epar = fitparameters[iparam+2] ; | |
d15a28e7 | 529 | iparam += 3 ; |
92862013 | 530 | distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ; |
531 | distance = TMath::Sqrt(distance) ; | |
b2a60966 | 532 | efit[iDigit] += epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ; |
d15a28e7 | 533 | } |
d15a28e7 | 534 | } |
535 | ||
536 | iparam = 0 ; | |
537 | Float_t eDigit ; | |
538 | ||
98cbd830 | 539 | |
92862013 | 540 | while(iparam < nPar ){ |
541 | xpar = fitparameters[iparam] ; | |
542 | zpar = fitparameters[iparam+1] ; | |
543 | epar = fitparameters[iparam+2] ; | |
d15a28e7 | 544 | iparam += 3 ; |
98cbd830 | 545 | |
546 | (*emcIn)[iRecPoint] = new AliPHOSEmcRecPoint( iniEmc->GetLogWeightCut(), iniEmc->GetLocMaxCut() ) ; | |
547 | ||
548 | emcRP = (AliPHOSEmcRecPoint *) emcIn->At(iRecPoint); | |
549 | iRecPoint++ ; | |
d15a28e7 | 550 | |
92862013 | 551 | for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){ |
98cbd830 | 552 | digit = fPlease->GimeDigit( emcDigits[iDigit] ) ; |
553 | fGeom->AbsToRelNumbering(digit->GetId(), relid) ; | |
554 | fGeom->RelPosInModule(relid, xDigit, zDigit) ; | |
92862013 | 555 | distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ; |
556 | distance = TMath::Sqrt(distance) ; | |
b2a60966 | 557 | ratio = epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) / efit[iDigit] ; |
92862013 | 558 | eDigit = emcEnergies[iDigit] * ratio ; |
9f616d61 | 559 | emcRP->AddDigit( *digit, eDigit ) ; |
d15a28e7 | 560 | } |
561 | ||
d15a28e7 | 562 | } |
31aa6d6c | 563 | |
564 | delete[] fitparameters ; | |
565 | delete[] efit ; | |
566 | ||
d15a28e7 | 567 | } |
6ad0bfa0 | 568 | |
d15a28e7 | 569 | //______________________________________________________________________________ |
92862013 | 570 | void UnfoldingChiSquare(Int_t & nPar, Double_t * Grad, Double_t & fret, Double_t * x, Int_t iflag) |
d15a28e7 | 571 | { |
b2a60966 | 572 | // Calculates th Chi square for the cluster unfolding minimization |
573 | // Number of parameters, Gradient, Chi squared, parameters, what to do | |
98cbd830 | 574 | |
9f616d61 | 575 | AliPHOSEmcRecPoint * emcRP = (AliPHOSEmcRecPoint *) gMinuit->GetObjectFit() ; // EmcRecPoint to fit |
98cbd830 | 576 | |
6ad0bfa0 | 577 | Int_t * emcDigits = emcRP->GetDigitsList() ; |
98cbd830 | 578 | |
579 | Int_t nOfDigits = emcRP->GetDigitsMultiplicity() ; | |
580 | ||
d15a28e7 | 581 | Float_t * emcEnergies = emcRP->GetEnergiesList() ; |
98cbd830 | 582 | |
583 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; | |
584 | ||
585 | AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ; | |
586 | ||
d15a28e7 | 587 | fret = 0. ; |
588 | Int_t iparam ; | |
589 | ||
9f616d61 | 590 | if(iflag == 2) |
92862013 | 591 | for(iparam = 0 ; iparam < nPar ; iparam++) |
9f616d61 | 592 | Grad[iparam] = 0 ; // Will evaluate gradient |
593 | ||
98cbd830 | 594 | Double_t efit ; |
595 | ||
d15a28e7 | 596 | AliPHOSDigit * digit ; |
98cbd830 | 597 | Int_t iDigit ; |
598 | ||
599 | for( iDigit = 0 ; iDigit < nOfDigits ; iDigit++) { | |
600 | ||
601 | digit = please->GimeDigit( emcDigits[iDigit] ) ; | |
9f616d61 | 602 | |
92862013 | 603 | Int_t relid[4] ; |
d15a28e7 | 604 | Float_t xDigit ; |
605 | Float_t zDigit ; | |
98cbd830 | 606 | |
92862013 | 607 | geom->AbsToRelNumbering(digit->GetId(), relid) ; |
98cbd830 | 608 | |
92862013 | 609 | geom->RelPosInModule(relid, xDigit, zDigit) ; |
98cbd830 | 610 | |
9f616d61 | 611 | if(iflag == 2){ // calculate gradient |
612 | Int_t iParam = 0 ; | |
92862013 | 613 | efit = 0 ; |
614 | while(iParam < nPar ){ | |
615 | Double_t distance = (xDigit - x[iParam]) * (xDigit - x[iParam]) ; | |
9f616d61 | 616 | iParam++ ; |
92862013 | 617 | distance += (zDigit - x[iParam]) * (zDigit - x[iParam]) ; |
618 | distance = TMath::Sqrt( distance ) ; | |
9f616d61 | 619 | iParam++ ; |
92862013 | 620 | efit += x[iParam] * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ; |
9f616d61 | 621 | iParam++ ; |
622 | } | |
92862013 | 623 | Double_t sum = 2. * (efit - emcEnergies[iDigit]) / emcEnergies[iDigit] ; // Here we assume, that sigma = sqrt(E) |
9f616d61 | 624 | iParam = 0 ; |
92862013 | 625 | while(iParam < nPar ){ |
9f616d61 | 626 | Double_t xpar = x[iParam] ; |
627 | Double_t zpar = x[iParam+1] ; | |
92862013 | 628 | Double_t epar = x[iParam+2] ; |
9f616d61 | 629 | Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ); |
630 | Double_t shape = sum * AliPHOSTrackSegmentMakerv1::ShowerShape(dr) ; | |
631 | Double_t r4 = dr*dr*dr*dr ; | |
632 | Double_t r295 = TMath::Power(dr,2.95) ; | |
633 | Double_t deriv =-4. * dr*dr * ( 2.32 / ( (2.32 + 0.26 * r4) * (2.32 + 0.26 * r4) ) + | |
634 | 0.0316 * (1. + 0.0171 * r295) / ( ( 1. + 0.0652 * r295) * (1. + 0.0652 * r295) ) ) ; | |
635 | ||
92862013 | 636 | Grad[iParam] += epar * shape * deriv * (xpar - xDigit) ; // Derivative over x |
9f616d61 | 637 | iParam++ ; |
92862013 | 638 | Grad[iParam] += epar * shape * deriv * (zpar - zDigit) ; // Derivative over z |
9f616d61 | 639 | iParam++ ; |
640 | Grad[iParam] += shape ; // Derivative over energy | |
641 | iParam++ ; | |
642 | } | |
643 | } | |
92862013 | 644 | efit = 0; |
9f616d61 | 645 | iparam = 0 ; |
98cbd830 | 646 | |
92862013 | 647 | while(iparam < nPar ){ |
9f616d61 | 648 | Double_t xpar = x[iparam] ; |
649 | Double_t zpar = x[iparam+1] ; | |
92862013 | 650 | Double_t epar = x[iparam+2] ; |
9f616d61 | 651 | iparam += 3 ; |
92862013 | 652 | Double_t distance = (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) ; |
653 | distance = TMath::Sqrt(distance) ; | |
654 | efit += epar * AliPHOSTrackSegmentMakerv1::ShowerShape(distance) ; | |
9f616d61 | 655 | } |
98cbd830 | 656 | |
92862013 | 657 | fret += (efit-emcEnergies[iDigit])*(efit-emcEnergies[iDigit])/emcEnergies[iDigit] ; |
9f616d61 | 658 | // Here we assume, that sigma = sqrt(E) |
d15a28e7 | 659 | } |
98cbd830 | 660 | |
d15a28e7 | 661 | } |