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c0a16418 | 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 | ||
a9c259b2 | 16 | /* $Id$ */ |
c0a16418 | 17 | |
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
c0a16418 | 19 | /// \class AliMUONClusterSplitterMLEM |
20 | /// | |
a9c259b2 | 21 | /// Splitter class for the MLEM algorithm. Performs fitting procedure |
22 | /// with up to 3 hit candidates and tries to split clusters if the number | |
23 | /// of candidates exceeds 3. | |
c0a16418 | 24 | /// |
25 | /// \author Laurent Aphecetche (for the "new" C++ structure) and | |
26 | /// Alexander Zinchenko, JINR Dubna, for the hardcore of it ;-) | |
3d1463c8 | 27 | //----------------------------------------------------------------------------- |
c0a16418 | 28 | |
29 | #include "AliMUONClusterSplitterMLEM.h" | |
a9c259b2 | 30 | #include "AliMUONClusterFinderMLEM.h" // for status flag constants |
c0a16418 | 31 | |
c0a16418 | 32 | #include "AliMUONCluster.h" |
33 | #include "AliMUONPad.h" | |
34 | #include "AliMUONPad.h" | |
c0a16418 | 35 | #include "AliMUONConstants.h" |
36 | #include "AliMpDEManager.h" | |
37 | #include "AliMUONMathieson.h" | |
38 | ||
168e9c4d | 39 | #include "AliMpEncodePair.h" |
40 | ||
866c3232 | 41 | #include "AliLog.h" |
42 | ||
43 | #include <TClonesArray.h> | |
44 | #include <TH2.h> | |
45 | #include <TMath.h> | |
46 | #include <TMatrixD.h> | |
47 | #include <TObjArray.h> | |
866c3232 | 48 | #include <TRandom.h> |
9bbd7f60 | 49 | #include <Riostream.h> |
866c3232 | 50 | |
78649106 | 51 | /// \cond CLASSIMP |
c0a16418 | 52 | ClassImp(AliMUONClusterSplitterMLEM) |
78649106 | 53 | /// \endcond |
c0a16418 | 54 | |
a9c259b2 | 55 | //const Double_t AliMUONClusterSplitterMLEM::fgkCouplMin = 1.e-3; // threshold on coupling |
56 | const Double_t AliMUONClusterSplitterMLEM::fgkCouplMin = 1.e-2; // threshold on coupling | |
c0a16418 | 57 | |
58 | //_____________________________________________________________________________ | |
59 | AliMUONClusterSplitterMLEM::AliMUONClusterSplitterMLEM(Int_t detElemId, | |
110edb51 | 60 | TObjArray* pixArray, |
61 | Double_t lowestPixelCharge, | |
62 | Double_t lowestPadCharge, | |
63 | Double_t lowestClusterCharge) | |
c0a16418 | 64 | : TObject(), |
bf0d3528 | 65 | fPixArray(pixArray), |
c0a16418 | 66 | fMathieson(0x0), |
67 | fDetElemId(detElemId), | |
68 | fNpar(0), | |
69 | fQtot(0), | |
9bbd7f60 | 70 | fnCoupled(0), |
110edb51 | 71 | fDebug(0), |
72 | fLowestPixelCharge(lowestPixelCharge), | |
73 | fLowestPadCharge(lowestPadCharge), | |
74 | fLowestClusterCharge(lowestClusterCharge) | |
c0a16418 | 75 | { |
76 | /// Constructor | |
77 | ||
4e51cfd2 | 78 | AliMq::Station12Type stationType = AliMpDEManager::GetStation12Type(fDetElemId); |
c0a16418 | 79 | |
80 | Float_t kx3 = AliMUONConstants::SqrtKx3(); | |
81 | Float_t ky3 = AliMUONConstants::SqrtKy3(); | |
82 | Float_t pitch = AliMUONConstants::Pitch(); | |
83 | ||
4e51cfd2 | 84 | if ( stationType == AliMq::kStation1 ) |
c0a16418 | 85 | { |
86 | kx3 = AliMUONConstants::SqrtKx3St1(); | |
87 | ky3 = AliMUONConstants::SqrtKy3St1(); | |
88 | pitch = AliMUONConstants::PitchSt1(); | |
89 | } | |
90 | ||
91 | fMathieson = new AliMUONMathieson; | |
92 | ||
93 | fMathieson->SetPitch(pitch); | |
94 | fMathieson->SetSqrtKx3AndDeriveKx2Kx4(kx3); | |
95 | fMathieson->SetSqrtKy3AndDeriveKy2Ky4(ky3); | |
96 | ||
97 | } | |
98 | ||
99 | //_____________________________________________________________________________ | |
100 | AliMUONClusterSplitterMLEM::~AliMUONClusterSplitterMLEM() | |
101 | { | |
71a2d3aa | 102 | /// Destructor |
103 | ||
c0a16418 | 104 | delete fMathieson; |
105 | } | |
106 | ||
107 | //_____________________________________________________________________________ | |
108 | void | |
109 | AliMUONClusterSplitterMLEM::AddBin(TH2 *mlem, | |
110 | Int_t ic, Int_t jc, Int_t mode, | |
111 | Bool_t *used, TObjArray *pix) | |
112 | { | |
113 | /// Add a bin to the cluster | |
114 | ||
115 | Int_t nx = mlem->GetNbinsX(); | |
116 | Int_t ny = mlem->GetNbinsY(); | |
117 | Double_t cont1, cont = mlem->GetCellContent(jc,ic); | |
118 | AliMUONPad *pixPtr = 0; | |
119 | ||
2abdae6e | 120 | Int_t ie = TMath::Min(ic+1,ny), je = TMath::Min(jc+1,nx); |
121 | for (Int_t i = TMath::Max(ic-1,1); i <= ie; ++i) { | |
122 | for (Int_t j = TMath::Max(jc-1,1); j <= je; ++j) { | |
c0a16418 | 123 | if (i != ic && j != jc) continue; |
124 | if (used[(i-1)*nx+j-1]) continue; | |
125 | cont1 = mlem->GetCellContent(j,i); | |
126 | if (mode && cont1 > cont) continue; | |
127 | used[(i-1)*nx+j-1] = kTRUE; | |
110edb51 | 128 | if (cont1 < fLowestPixelCharge) continue; |
c0a16418 | 129 | if (pix) pix->Add(BinToPix(mlem,j,i)); |
130 | else { | |
131 | pixPtr = new AliMUONPad (mlem->GetXaxis()->GetBinCenter(j), | |
a9c259b2 | 132 | mlem->GetYaxis()->GetBinCenter(i), 0, 0, cont1); |
2abdae6e | 133 | fPixArray->Add(pixPtr); |
c0a16418 | 134 | } |
135 | AddBin(mlem, i, j, mode, used, pix); // recursive call | |
136 | } | |
137 | } | |
138 | } | |
139 | ||
140 | //_____________________________________________________________________________ | |
141 | void | |
142 | AliMUONClusterSplitterMLEM::AddCluster(Int_t ic, Int_t nclust, | |
143 | TMatrixD& aijcluclu, | |
144 | Bool_t *used, Int_t *clustNumb, Int_t &nCoupled) | |
145 | { | |
146 | /// Add a cluster to the group of coupled clusters | |
147 | ||
2abdae6e | 148 | for (Int_t i = 0; i < nclust; ++i) { |
c0a16418 | 149 | if (used[i]) continue; |
150 | if (aijcluclu(i,ic) < fgkCouplMin) continue; | |
151 | used[i] = kTRUE; | |
152 | clustNumb[nCoupled++] = i; | |
153 | AddCluster(i, nclust, aijcluclu, used, clustNumb, nCoupled); | |
154 | } | |
155 | } | |
156 | ||
157 | //_____________________________________________________________________________ | |
158 | TObject* | |
159 | AliMUONClusterSplitterMLEM::BinToPix(TH2 *mlem, | |
160 | Int_t jc, Int_t ic) | |
161 | { | |
162 | /// Translate histogram bin to pixel | |
163 | ||
164 | Double_t yc = mlem->GetYaxis()->GetBinCenter(ic); | |
165 | Double_t xc = mlem->GetXaxis()->GetBinCenter(jc); | |
166 | ||
167 | Int_t nPix = fPixArray->GetEntriesFast(); | |
168 | AliMUONPad *pixPtr = NULL; | |
169 | ||
170 | // Compare pixel and bin positions | |
2abdae6e | 171 | for (Int_t i = 0; i < nPix; ++i) { |
c0a16418 | 172 | pixPtr = (AliMUONPad*) fPixArray->UncheckedAt(i); |
110edb51 | 173 | if (pixPtr->Charge() < fLowestPixelCharge) continue; |
c0a16418 | 174 | if (TMath::Abs(pixPtr->Coord(0)-xc)<1.e-4 && TMath::Abs(pixPtr->Coord(1)-yc)<1.e-4) |
175 | { | |
2abdae6e | 176 | //return (TObject*) pixPtr; |
177 | return pixPtr; | |
c0a16418 | 178 | } |
179 | } | |
180 | AliError(Form(" Something wrong ??? %f %f ", xc, yc)); | |
181 | return NULL; | |
182 | } | |
183 | ||
184 | //_____________________________________________________________________________ | |
185 | Float_t | |
186 | AliMUONClusterSplitterMLEM::ChargeIntegration(Double_t x, Double_t y, | |
187 | const AliMUONPad& pad) | |
188 | { | |
189 | /// Compute the Mathieson integral on pad area, assuming the center | |
190 | /// of the Mathieson is at (x,y) | |
191 | ||
192 | TVector2 lowerLeft(TVector2(x,y)-pad.Position()-pad.Dimensions()); | |
193 | TVector2 upperRight(lowerLeft + pad.Dimensions()*2.0); | |
194 | ||
195 | return fMathieson->IntXY(lowerLeft.X(),lowerLeft.Y(), | |
196 | upperRight.X(),upperRight.Y()); | |
197 | } | |
198 | ||
199 | //_____________________________________________________________________________ | |
200 | void | |
201 | AliMUONClusterSplitterMLEM::Fcn1(const AliMUONCluster& cluster, | |
202 | Int_t & /*fNpar*/, Double_t * /*gin*/, | |
a9c259b2 | 203 | Double_t &f, Double_t *par, Int_t iflag) |
c0a16418 | 204 | { |
a9c259b2 | 205 | /// Computes the functional to be minimized |
c0a16418 | 206 | |
207 | Int_t indx, npads=0; | |
208 | Double_t charge, delta, coef=0, chi2=0, qTot = 0; | |
a9c259b2 | 209 | static Double_t qAver = 0; |
c0a16418 | 210 | |
a9c259b2 | 211 | Int_t mult = cluster.Multiplicity(), iend = fNpar / 3; |
2abdae6e | 212 | for (Int_t j = 0; j < mult; ++j) |
c0a16418 | 213 | { |
214 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 215 | //if ( pad->Status() !=1 || pad->IsSaturated() ) continue; |
50205ffb | 216 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetUseForFitFlag() || |
217 | pad->Charge() == 0 ) continue; | |
a9c259b2 | 218 | if (iflag == 0) { |
219 | if ( pad->IsReal() ) npads++; // exclude virtual pads | |
220 | qTot += pad->Charge(); | |
221 | } | |
c0a16418 | 222 | charge = 0; |
a9c259b2 | 223 | for (Int_t i = 0; i <= iend; ++i) |
224 | { | |
225 | // sum over hits | |
226 | indx = 3 * i; | |
227 | coef = Param2Coef(i, coef, par); | |
9bbd7f60 | 228 | charge += ChargeIntegration(par[indx],par[indx+1],*pad) * coef; |
c0a16418 | 229 | } |
230 | charge *= fQtot; | |
a9c259b2 | 231 | delta = charge - pad->Charge(); |
c0a16418 | 232 | delta *= delta; |
a9c259b2 | 233 | delta /= pad->Charge(); |
c0a16418 | 234 | chi2 += delta; |
235 | } // for (Int_t j=0; | |
0d66cd7d | 236 | if (iflag == 0 && npads) qAver = qTot / npads; |
237 | if (!npads) | |
238 | { | |
239 | AliError(Form("Got npads=0. Please check")); | |
240 | } | |
a9c259b2 | 241 | f = chi2 / qAver; |
242 | } | |
243 | ||
244 | //_____________________________________________________________________________ | |
9ee1d6ff | 245 | Double_t AliMUONClusterSplitterMLEM::Param2Coef(Int_t icand, Double_t coef, Double_t *par) const |
a9c259b2 | 246 | { |
247 | /// Extract hit contribution scale factor from fit parameters | |
248 | ||
249 | if (fNpar == 2) return 1.; | |
250 | if (fNpar == 5) return icand==0 ? par[2] : TMath::Max(1.-par[2],0.); | |
251 | if (icand == 0) return par[2]; | |
252 | if (icand == 1) return TMath::Max((1.-par[2])*par[5], 0.); | |
253 | return TMath::Max(1.-par[2]-coef,0.); | |
c0a16418 | 254 | } |
255 | ||
256 | //_____________________________________________________________________________ | |
257 | Int_t | |
258 | AliMUONClusterSplitterMLEM::Fit(const AliMUONCluster& cluster, | |
259 | Int_t iSimple, Int_t nfit, | |
57e2ad1a | 260 | const Int_t *clustFit, TObjArray **clusters, |
c0a16418 | 261 | Double_t *parOk, |
b161da28 | 262 | TObjArray& clusterList, TH2 *mlem) |
c0a16418 | 263 | { |
a9c259b2 | 264 | /// Steering function and fitting procedure for the fit of pad charge distribution |
c0a16418 | 265 | |
266 | // AliDebug(2,Form("iSimple=%d nfit=%d",iSimple,nfit)); | |
267 | ||
c0a16418 | 268 | Double_t xmin = mlem->GetXaxis()->GetXmin() - mlem->GetXaxis()->GetBinWidth(1); |
269 | Double_t xmax = mlem->GetXaxis()->GetXmax() + mlem->GetXaxis()->GetBinWidth(1); | |
270 | Double_t ymin = mlem->GetYaxis()->GetXmin() - mlem->GetYaxis()->GetBinWidth(1); | |
271 | Double_t ymax = mlem->GetYaxis()->GetXmax() + mlem->GetYaxis()->GetBinWidth(1); | |
a9c259b2 | 272 | Double_t xPad = 0, yPad = 99999; |
c0a16418 | 273 | |
274 | // Number of pads to use and number of virtual pads | |
275 | Int_t npads = 0, nVirtual = 0, nfit0 = nfit; | |
9bbd7f60 | 276 | //cluster.Print("full"); |
2abdae6e | 277 | Int_t mult = cluster.Multiplicity(); |
278 | for (Int_t i = 0; i < mult; ++i ) | |
c0a16418 | 279 | { |
280 | AliMUONPad* pad = cluster.Pad(i); | |
9bbd7f60 | 281 | if ( !pad->IsReal() ) ++nVirtual; |
a9c259b2 | 282 | //if ( pad->Status() !=1 || pad->IsSaturated() ) continue; |
05542040 | 283 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetUseForFitFlag() ) continue; |
9bbd7f60 | 284 | if ( pad->IsReal() ) |
c0a16418 | 285 | { |
286 | ++npads; | |
287 | if (yPad > 9999) | |
288 | { | |
a9c259b2 | 289 | xPad = pad->X(); |
290 | yPad = pad->Y(); | |
c0a16418 | 291 | } |
292 | else | |
293 | { | |
a9c259b2 | 294 | if (pad->DY() < pad->DX() ) |
c0a16418 | 295 | { |
a9c259b2 | 296 | yPad = pad->Y(); |
c0a16418 | 297 | } |
298 | else | |
299 | { | |
a9c259b2 | 300 | xPad = pad->X(); |
c0a16418 | 301 | } |
302 | } | |
303 | } | |
304 | } | |
305 | ||
306 | fNpar = 0; | |
307 | fQtot = 0; | |
308 | ||
309 | if (npads < 2) return 0; | |
310 | ||
311 | // FIXME : AliWarning("Reconnect the following code for hit/track passing ?"); | |
312 | ||
313 | // Int_t tracks[3] = {-1, -1, -1}; | |
314 | ||
315 | /* | |
316 | Int_t digit = 0; | |
317 | AliMUONDigit *mdig = 0; | |
318 | for (Int_t cath=0; cath<2; cath++) { | |
319 | for (Int_t i=0; i<fnPads[0]+fnPads[1]; i++) { | |
320 | if (fPadIJ[0][i] != cath) continue; | |
321 | if (fPadIJ[1][i] != 1) continue; | |
322 | if (fXyq[3][i] < 0) continue; // exclude virtual pads | |
323 | digit = TMath::Nint (fXyq[5][i]); | |
324 | if (digit >= 0) mdig = fInput->Digit(cath,digit); | |
325 | else mdig = fInput->Digit(TMath::Even(cath),-digit-1); | |
326 | //if (!mdig) mdig = fInput->Digit(TMath::Even(cath),digit); | |
327 | if (!mdig) continue; // protection for cluster display | |
328 | if (mdig->Hit() >= 0) { | |
329 | if (tracks[0] < 0) { | |
330 | tracks[0] = mdig->Hit(); | |
331 | tracks[1] = mdig->Track(0); | |
332 | } else if (mdig->Track(0) < tracks[1]) { | |
333 | tracks[0] = mdig->Hit(); | |
334 | tracks[1] = mdig->Track(0); | |
335 | } | |
336 | } | |
337 | if (mdig->Track(1) >= 0 && mdig->Track(1) != tracks[1]) { | |
338 | if (tracks[2] < 0) tracks[2] = mdig->Track(1); | |
339 | else tracks[2] = TMath::Min (tracks[2], mdig->Track(1)); | |
340 | } | |
341 | } // for (Int_t i=0; | |
342 | } // for (Int_t cath=0; | |
343 | */ | |
344 | ||
345 | // Get number of pads in X and Y | |
a9c259b2 | 346 | //const Int_t kStatusToTest(1); |
05542040 | 347 | const Int_t kStatusToTest(AliMUONClusterFinderMLEM::GetUseForFitFlag()); |
c0a16418 | 348 | |
168e9c4d | 349 | Long_t nofPads = cluster.NofPads(kStatusToTest); |
350 | Int_t nInX = AliMp::PairFirst(nofPads); | |
351 | Int_t nInY = AliMp::PairSecond(nofPads); | |
9bbd7f60 | 352 | |
353 | if (fDebug) { | |
354 | Int_t npadOK = 0; | |
355 | for (Int_t j = 0; j < cluster.Multiplicity(); ++j) { | |
356 | AliMUONPad *pad = cluster.Pad(j); | |
a9c259b2 | 357 | //if (pad->Status() == 1 && !pad->IsSaturated()) npadOK++; |
05542040 | 358 | if (pad->Status() == AliMUONClusterFinderMLEM::GetUseForFitFlag() && !pad->IsSaturated()) npadOK++; |
9bbd7f60 | 359 | } |
360 | cout << " Number of pads to fit: " << npadOK << endl; | |
361 | cout << " nInX and Y: " << nInX << " " << nInY << endl; | |
362 | } | |
c0a16418 | 363 | |
364 | Int_t nfitMax = 3; | |
365 | nfitMax = TMath::Min (nfitMax, (npads + 1) / 3); | |
366 | if (nfitMax > 1) { | |
94bf739c | 367 | if (((nInX < 3) && (nInY < 3)) || ((nInX == 3) && (nInY < 3)) || ((nInX < 3) && (nInY == 3))) nfitMax = 1; // not enough pads in each direction |
c0a16418 | 368 | } |
369 | if (nfit > nfitMax) nfit = nfitMax; | |
370 | ||
371 | // Take cluster maxima as fitting seeds | |
372 | TObjArray *pix; | |
373 | AliMUONPad *pixPtr; | |
374 | Int_t npxclu; | |
375 | Double_t cont, cmax = 0, xseed = 0, yseed = 0, errOk[8], qq = 0; | |
8c14ac2e | 376 | |
377 | for ( int i = 0; i < 8; ++i ) errOk[i]=0.0; | |
378 | ||
c0a16418 | 379 | Double_t xyseed[3][2], qseed[3], xyCand[3][2] = {{0},{0}}, sigCand[3][2] = {{0},{0}}; |
380 | ||
2abdae6e | 381 | for (Int_t ifit = 1; ifit <= nfit0; ++ifit) |
c0a16418 | 382 | { |
383 | cmax = 0; | |
384 | pix = clusters[clustFit[ifit-1]]; | |
385 | npxclu = pix->GetEntriesFast(); | |
386 | //qq = 0; | |
2abdae6e | 387 | for (Int_t clu = 0; clu < npxclu; ++clu) |
c0a16418 | 388 | { |
389 | pixPtr = (AliMUONPad*) pix->UncheckedAt(clu); | |
390 | cont = pixPtr->Charge(); | |
391 | fQtot += cont; | |
392 | if (cont > cmax) | |
393 | { | |
394 | cmax = cont; | |
395 | xseed = pixPtr->Coord(0); | |
396 | yseed = pixPtr->Coord(1); | |
397 | } | |
398 | qq += cont; | |
399 | xyCand[0][0] += pixPtr->Coord(0) * cont; | |
400 | xyCand[0][1] += pixPtr->Coord(1) * cont; | |
401 | sigCand[0][0] += pixPtr->Coord(0) * pixPtr->Coord(0) * cont; | |
402 | sigCand[0][1] += pixPtr->Coord(1) * pixPtr->Coord(1) * cont; | |
403 | } | |
404 | xyseed[ifit-1][0] = xseed; | |
405 | xyseed[ifit-1][1] = yseed; | |
406 | qseed[ifit-1] = cmax; | |
407 | } // for (Int_t ifit=1; | |
408 | ||
409 | xyCand[0][0] /= qq; // <x> | |
410 | xyCand[0][1] /= qq; // <y> | |
411 | sigCand[0][0] = sigCand[0][0]/qq - xyCand[0][0]*xyCand[0][0]; // <x^2> - <x>^2 | |
412 | sigCand[0][0] = sigCand[0][0] > 0 ? TMath::Sqrt (sigCand[0][0]) : 0; | |
413 | sigCand[0][1] = sigCand[0][1]/qq - xyCand[0][1]*xyCand[0][1]; // <y^2> - <y>^2 | |
414 | sigCand[0][1] = sigCand[0][1] > 0 ? TMath::Sqrt (sigCand[0][1]) : 0; | |
9bbd7f60 | 415 | if (fDebug) cout << xyCand[0][0] << " " << xyCand[0][1] << " " << sigCand[0][0] << " " << sigCand[0][1] << endl; |
c0a16418 | 416 | |
417 | Int_t nDof, maxSeed[3];//, nMax = 0; | |
1e875d50 | 418 | |
419 | if ( nfit0 < 0 || nfit0 > 3 ) { | |
420 | AliErrorStream() << "Wrong nfit0 value: " << nfit0 << endl; | |
421 | return nfit; | |
422 | } | |
a9c259b2 | 423 | TMath::Sort(nfit0, qseed, maxSeed, kTRUE); // in decreasing order |
c0a16418 | 424 | |
a9c259b2 | 425 | Double_t step[3]={0.01,0.002,0.02}, fmin, chi2o = 9999, chi2n; |
4ff4097b | 426 | Double_t *gin = 0, func0, func1, param[8]={0}, step0[8]={0}; |
a9c259b2 | 427 | Double_t param0[2][8]={{0},{0}}, deriv[2][8]={{0},{0}}; |
4ff4097b | 428 | Double_t shift[8]={0}, stepMax, derMax, parmin[8]={0}, parmax[8]={0}, func2[2]={0}, shift0; |
429 | Double_t delta[8]={0}, scMax, dder[8], estim, shiftSave = 0; | |
a9c259b2 | 430 | Int_t min, max, nCall = 0, nLoop, idMax = 0, iestMax = 0, nFail; |
431 | Double_t rad, dist[3] = {0}; | |
c0a16418 | 432 | |
a9c259b2 | 433 | // Try to fit with one-track hypothesis, then 2-track. If chi2/dof is |
434 | // lower, try 3-track (if number of pads is sufficient). | |
435 | Int_t iflag = 0; // for the first call of fcn1 | |
436 | for (Int_t iseed = 0; iseed < nfit; ++iseed) | |
437 | { | |
c0a16418 | 438 | |
a9c259b2 | 439 | Int_t memory[8] = {0}; |
440 | if (iseed) | |
441 | { | |
442 | for (Int_t j = 0; j < fNpar; ++j) | |
c0a16418 | 443 | { |
a9c259b2 | 444 | param[j] = parOk[j]; |
c0a16418 | 445 | } |
a9c259b2 | 446 | param[fNpar] = 0.6; |
d41c0c32 | 447 | parmin[fNpar] = 1E-9; |
a9c259b2 | 448 | parmax[fNpar++] = 1; |
449 | } | |
c0a16418 | 450 | |
a9c259b2 | 451 | if (nfit == 1) |
452 | { | |
453 | param[fNpar] = xyCand[0][0]; // take COG | |
454 | } | |
455 | else | |
456 | { | |
457 | param[fNpar] = xyseed[maxSeed[iseed]][0]; | |
458 | //param[fNpar] = fNpar==0 ? -16.1651 : -15.2761; | |
459 | } | |
460 | parmin[fNpar] = xmin; | |
461 | parmax[fNpar++] = xmax; | |
462 | if (nfit == 1) | |
463 | { | |
464 | param[fNpar] = xyCand[0][1]; // take COG | |
465 | } | |
466 | else | |
467 | { | |
468 | param[fNpar] = xyseed[maxSeed[iseed]][1]; | |
469 | //param[fNpar] = fNpar==1 ? -15.1737 : -15.8487; | |
470 | } | |
471 | parmin[fNpar] = ymin; | |
472 | parmax[fNpar++] = ymax; | |
473 | ||
474 | for (Int_t j = 0; j < fNpar; ++j) | |
475 | { | |
476 | step0[j] = shift[j] = step[j%3]; | |
477 | } | |
478 | ||
479 | if (iseed) | |
480 | { | |
481 | for (Int_t j = 0; j < fNpar; ++j) | |
c0a16418 | 482 | { |
a9c259b2 | 483 | param0[1][j] = 0; |
2abdae6e | 484 | } |
a9c259b2 | 485 | } |
486 | if (fDebug) { | |
487 | for (Int_t j = 0; j < fNpar; ++j) cout << param[j] << " "; | |
488 | cout << endl; | |
489 | } | |
c0a16418 | 490 | |
a9c259b2 | 491 | // Try new algorithm |
492 | min = nLoop = 1; stepMax = func2[1] = derMax = 999999; nFail = 0; | |
493 | ||
494 | while (1) | |
495 | { | |
496 | max = !min; | |
497 | Fcn1(cluster,fNpar, gin, func0, param, iflag); nCall++; | |
498 | iflag = 1; | |
499 | //cout << " Func: " << func0 << endl; | |
c0a16418 | 500 | |
a9c259b2 | 501 | func2[max] = func0; |
502 | for (Int_t j = 0; j < fNpar; ++j) | |
c0a16418 | 503 | { |
a9c259b2 | 504 | param0[max][j] = param[j]; |
505 | delta[j] = step0[j]; | |
506 | param[j] += delta[j] / 10; | |
507 | if (j > 0) param[j-1] -= delta[j-1] / 10; | |
508 | Fcn1(cluster,fNpar, gin, func1, param, iflag); nCall++; | |
509 | deriv[max][j] = (func1 - func0) / delta[j] * 10; // first derivative | |
510 | //cout << j << " " << deriv[max][j] << endl; | |
511 | dder[j] = param0[0][j] != param0[1][j] ? (deriv[0][j] - deriv[1][j]) / | |
512 | (param0[0][j] - param0[1][j]) : 0; // second derivative | |
513 | } | |
514 | param[fNpar-1] -= delta[fNpar-1] / 10; | |
515 | if (nCall > 2000) break; | |
c0a16418 | 516 | |
a9c259b2 | 517 | min = func2[0] < func2[1] ? 0 : 1; |
518 | nFail = min == max ? 0 : nFail + 1; | |
c0a16418 | 519 | |
a9c259b2 | 520 | stepMax = derMax = estim = 0; |
521 | for (Int_t j = 0; j < fNpar; ++j) | |
522 | { | |
523 | // Estimated distance to minimum | |
524 | shift0 = shift[j]; | |
525 | if (nLoop == 1) | |
526 | { | |
527 | shift[j] = TMath::Sign (step0[j], -deriv[max][j]); // first step | |
528 | } | |
529 | else if (TMath::Abs(deriv[0][j]) < 1.e-3 && TMath::Abs(deriv[1][j]) < 1.e-3) | |
530 | { | |
531 | shift[j] = 0; | |
532 | } | |
94bf739c | 533 | else if (((deriv[min][j]*deriv[!min][j] > 0) && (TMath::Abs(deriv[min][j]) > TMath::Abs(deriv[!min][j]))) |
534 | || (TMath::Abs(deriv[0][j]-deriv[1][j]) < 1.e-3) || (TMath::Abs(dder[j]) < 1.e-6)) | |
a9c259b2 | 535 | { |
536 | shift[j] = -TMath::Sign (shift[j], (func2[0]-func2[1]) * (param0[0][j]-param0[1][j])); | |
537 | if (min == max) | |
538 | { | |
539 | if (memory[j] > 1) | |
9bbd7f60 | 540 | { |
a9c259b2 | 541 | shift[j] *= 2; |
542 | } | |
543 | memory[j]++; | |
9bbd7f60 | 544 | } |
a9c259b2 | 545 | } |
546 | else | |
547 | { | |
548 | shift[j] = dder[j] != 0 ? -deriv[min][j] / dder[j] : 0; | |
549 | memory[j] = 0; | |
550 | } | |
c0a16418 | 551 | |
a9c259b2 | 552 | Double_t es = TMath::Abs(shift[j]) / step0[j]; |
553 | if (es > estim) | |
554 | { | |
555 | estim = es; | |
556 | iestMax = j; | |
557 | } | |
c0a16418 | 558 | |
a9c259b2 | 559 | // Too big step |
560 | if (TMath::Abs(shift[j])/step0[j] > 10) shift[j] = TMath::Sign(10.,shift[j]) * step0[j]; // | |
561 | ||
562 | // Failed to improve minimum | |
563 | if (min != max) | |
564 | { | |
565 | memory[j] = 0; | |
566 | param[j] = param0[min][j]; | |
567 | if (TMath::Abs(shift[j]+shift0) > 0.1*step0[j]) | |
c0a16418 | 568 | { |
a9c259b2 | 569 | shift[j] = (shift[j] + shift0) / 2; |
570 | } | |
571 | else | |
c0a16418 | 572 | { |
a9c259b2 | 573 | shift[j] /= -2; |
574 | } | |
575 | } | |
c0a16418 | 576 | |
a9c259b2 | 577 | // Too big step |
578 | if (TMath::Abs(shift[j]*deriv[min][j]) > func2[min]) | |
579 | { | |
580 | shift[j] = TMath::Sign (func2[min]/deriv[min][j], shift[j]); | |
581 | } | |
582 | ||
583 | // Introduce step relaxation factor | |
584 | if (memory[j] < 3) | |
585 | { | |
586 | scMax = 1 + 4 / TMath::Max(nLoop/2.,1.); | |
587 | if (TMath::Abs(shift0) > 0 && TMath::Abs(shift[j]/shift0) > scMax) | |
c0a16418 | 588 | { |
a9c259b2 | 589 | shift[j] = TMath::Sign (shift0*scMax, shift[j]); |
590 | } | |
591 | } | |
592 | param[j] += shift[j]; | |
593 | // Check parameter limits | |
594 | if (param[j] < parmin[j]) | |
595 | { | |
596 | shift[j] = parmin[j] - param[j]; | |
597 | param[j] = parmin[j]; | |
598 | } | |
599 | else if (param[j] > parmax[j]) | |
600 | { | |
601 | shift[j] = parmax[j] - param[j]; | |
602 | param[j] = parmax[j]; | |
603 | } | |
604 | //cout << " xxx " << j << " " << shift[j] << " " << param[j] << endl; | |
605 | stepMax = TMath::Max (stepMax, TMath::Abs(shift[j]/step0[j])); | |
606 | if (TMath::Abs(deriv[min][j]) > derMax) | |
607 | { | |
608 | idMax = j; | |
609 | derMax = TMath::Abs (deriv[min][j]); | |
610 | } | |
611 | } // for (Int_t j=0; j<fNpar; | |
c0a16418 | 612 | |
94bf739c | 613 | if (((estim < 1) && (derMax < 2)) || nLoop > 150) break; // minimum was found |
c0a16418 | 614 | |
a9c259b2 | 615 | nLoop++; |
c0a16418 | 616 | |
a9c259b2 | 617 | // Check for small step |
618 | if (shift[idMax] == 0) | |
619 | { | |
620 | shift[idMax] = step0[idMax]/10; | |
621 | param[idMax] += shift[idMax]; | |
622 | continue; | |
623 | } | |
c0a16418 | 624 | |
a9c259b2 | 625 | if (!memory[idMax] && derMax > 0.5 && nLoop > 10) |
626 | { | |
627 | if (dder[idMax] != 0 && TMath::Abs(deriv[min][idMax]/dder[idMax]/shift[idMax]) > 10) | |
c0a16418 | 628 | { |
a9c259b2 | 629 | if (min == max) dder[idMax] = -dder[idMax]; |
630 | shift[idMax] = -deriv[min][idMax] / dder[idMax] / 10; | |
631 | param[idMax] += shift[idMax]; | |
632 | stepMax = TMath::Max (stepMax, TMath::Abs(shift[idMax])/step0[idMax]); | |
633 | if (min == max) shiftSave = shift[idMax]; | |
634 | } | |
635 | if (nFail > 10) | |
636 | { | |
637 | param[idMax] -= shift[idMax]; | |
638 | shift[idMax] = 4 * shiftSave * (gRandom->Rndm(0) - 0.5); | |
639 | param[idMax] += shift[idMax]; | |
640 | } | |
641 | } | |
642 | } // while (1) | |
c0a16418 | 643 | |
a9c259b2 | 644 | fmin = func2[min]; |
645 | ||
646 | nDof = npads - fNpar + nVirtual; | |
647 | if (!nDof) nDof++; | |
648 | chi2n = fmin / nDof; | |
649 | if (fDebug) cout << " Chi2 " << chi2n << " " << fNpar << endl; | |
c0a16418 | 650 | |
a9c259b2 | 651 | //if (fNpar > 2) cout << param0[min][fNpar-3] << " " << chi2n * (1+TMath::Min(1-param0[min][fNpar-3],0.25)) << endl; |
652 | //if (chi2n*1.2+1.e-6 > chi2o ) | |
94bf739c | 653 | if (fNpar > 2 && (chi2n > chi2o || ((iseed == nfit-1) |
654 | && (chi2n * (1+TMath::Min(1-param0[min][fNpar-3],0.25)) > chi2o)))) | |
a9c259b2 | 655 | { fNpar -= 3; break; } |
c0a16418 | 656 | |
a9c259b2 | 657 | // Save parameters and errors |
c0a16418 | 658 | |
a9c259b2 | 659 | if (nInX == 1) { |
660 | // One pad per direction | |
661 | //for (Int_t i=0; i<fNpar; ++i) if (i == 0 || i == 2 || i == 5) param0[min][i] = xPad; | |
662 | for (Int_t i=0; i<fNpar; ++i) if (i == 0 || i == 2 || i == 5) | |
663 | param0[min][i] = xyCand[0][0]; | |
664 | } | |
665 | if (nInY == 1) { | |
666 | // One pad per direction | |
667 | //for (Int_t i=0; i<fNpar; ++i) if (i == 1 || i == 3 || i == 6) param0[min][i] = yPad; | |
668 | for (Int_t i=0; i<fNpar; ++i) if (i == 1 || i == 3 || i == 6) | |
669 | param0[min][i] = xyCand[0][1]; | |
670 | } | |
c0a16418 | 671 | |
a9c259b2 | 672 | /* |
673 | if (iseed > 0) { | |
674 | // Find distance to the nearest neighbour | |
675 | dist[0] = dist[1] = TMath::Sqrt ((param0[min][0]-param0[min][2])* | |
676 | (param0[min][0]-param0[min][2]) | |
677 | +(param0[min][1]-param0[min][3])* | |
678 | (param0[min][1]-param0[min][3])); | |
679 | if (iseed > 1) { | |
680 | dist[2] = TMath::Sqrt ((param0[min][0]-param0[min][5])* | |
681 | (param0[min][0]-param0[min][5]) | |
682 | +(param0[min][1]-param0[min][6])* | |
683 | (param0[min][1]-param0[min][6])); | |
684 | rad = TMath::Sqrt ((param0[min][2]-param0[min][5])* | |
685 | (param0[min][2]-param0[min][5]) | |
686 | +(param0[min][3]-param0[min][6])* | |
687 | (param0[min][3]-param0[min][6])); | |
688 | if (dist[2] < dist[0]) dist[0] = dist[2]; | |
689 | if (rad < dist[1]) dist[1] = rad; | |
690 | if (rad < dist[2]) dist[2] = rad; | |
c0a16418 | 691 | } |
a9c259b2 | 692 | cout << dist[0] << " " << dist[1] << " " << dist[2] << endl; |
693 | if (dist[TMath::LocMin(iseed+1,dist)] < 1.) { fNpar -= 3; break; } | |
c0a16418 | 694 | } |
a9c259b2 | 695 | */ |
c0a16418 | 696 | |
a9c259b2 | 697 | for (Int_t i = 0; i < fNpar; ++i) { |
698 | parOk[i] = param0[min][i]; | |
699 | //errOk[i] = fmin; | |
700 | errOk[i] = chi2n; | |
701 | // Bounded params | |
702 | parOk[i] = TMath::Max (parOk[i], parmin[i]); | |
703 | parOk[i] = TMath::Min (parOk[i], parmax[i]); | |
704 | } | |
c0a16418 | 705 | |
a9c259b2 | 706 | chi2o = chi2n; |
707 | if (fmin < 0.1) break; // !!!??? | |
708 | } // for (Int_t iseed=0; | |
9bbd7f60 | 709 | |
a9c259b2 | 710 | if (fDebug) { |
711 | for (Int_t i=0; i<fNpar; ++i) { | |
712 | if (i == 4 || i == 7) { | |
94bf739c | 713 | if ((i == 7) || ((i == 4) && (fNpar < 7))) cout << parOk[i] << endl; |
a9c259b2 | 714 | else cout << parOk[i] * (1-parOk[7]) << endl; |
715 | continue; | |
9bbd7f60 | 716 | } |
a9c259b2 | 717 | cout << parOk[i] << " " << errOk[i] << endl; |
9bbd7f60 | 718 | } |
a9c259b2 | 719 | } |
720 | nfit = (fNpar + 1) / 3; | |
721 | dist[0] = dist[1] = dist[2] = 0; | |
722 | ||
723 | if (nfit > 1) { | |
724 | // Find distance to the nearest neighbour | |
725 | dist[0] = dist[1] = TMath::Sqrt ((parOk[0]-parOk[2])* | |
726 | (parOk[0]-parOk[2]) | |
727 | +(parOk[1]-parOk[3])* | |
728 | (parOk[1]-parOk[3])); | |
729 | if (nfit > 2) { | |
730 | dist[2] = TMath::Sqrt ((parOk[0]-parOk[5])* | |
731 | (parOk[0]-parOk[5]) | |
732 | +(parOk[1]-parOk[6])* | |
733 | (parOk[1]-parOk[6])); | |
734 | rad = TMath::Sqrt ((parOk[2]-parOk[5])* | |
735 | (parOk[2]-parOk[5]) | |
736 | +(parOk[3]-parOk[6])* | |
737 | (parOk[3]-parOk[6])); | |
738 | if (dist[2] < dist[0]) dist[0] = dist[2]; | |
739 | if (rad < dist[1]) dist[1] = rad; | |
740 | if (rad < dist[2]) dist[2] = rad; | |
c0a16418 | 741 | } |
a9c259b2 | 742 | } |
c0a16418 | 743 | |
a9c259b2 | 744 | Int_t indx; |
745 | ||
746 | Double_t coef = 0; | |
747 | if (iSimple) fnCoupled = 0; | |
748 | for (Int_t j = 0; j < nfit; ++j) { | |
749 | indx = 3 * j; | |
750 | coef = Param2Coef(j, coef, parOk); | |
751 | ||
752 | //void AliMUONClusterFinderMLEM::AddRawCluster(Double_t x, Double_t y, | |
753 | // Double_t qTot, Double_t fmin, | |
754 | // Int_t nfit, Int_t *tracks, | |
755 | // Double_t /*sigx*/, | |
756 | // Double_t /*sigy*/, | |
757 | // Double_t /*dist*/) | |
c0a16418 | 758 | |
110edb51 | 759 | if ( coef*fQtot >= fLowestClusterCharge ) |
a9c259b2 | 760 | { |
761 | //AZ AliMUONCluster* cluster1 = new AliMUONCluster(); | |
762 | AliMUONCluster* cluster1 = new AliMUONCluster(cluster); | |
c0a16418 | 763 | |
a9c259b2 | 764 | cluster1->SetCharge(coef*fQtot,coef*fQtot); |
765 | cluster1->SetPosition(TVector2(parOk[indx],parOk[indx+1]),TVector2(sigCand[0][0],sigCand[0][1])); | |
ad30b53f | 766 | //cluster1->SetChi2(dist[TMath::LocMin(nfit,dist)]); |
767 | Int_t idx = TMath::LocMin(nfit,dist); | |
768 | if ( idx < 0 || idx > 2 ) { | |
769 | AliErrorStream() << "Wrong index value: " << idx << endl; | |
770 | return nfit; | |
771 | } | |
772 | cluster1->SetChi2(dist[idx]); | |
c0a16418 | 773 | |
a9c259b2 | 774 | // FIXME: we miss some information in this cluster, as compared to |
775 | // the original AddRawCluster code. | |
776 | ||
777 | AliDebug(2,Form("Adding RawCluster detElemId %4d mult %2d charge %5d (xl,yl)=(%9.6g,%9.6g)", | |
778 | fDetElemId,cluster1->Multiplicity(),(Int_t)cluster1->Charge(), | |
779 | cluster1->Position().X(),cluster1->Position().Y())); | |
c0a16418 | 780 | |
a9c259b2 | 781 | clusterList.Add(cluster1); |
c0a16418 | 782 | } |
a9c259b2 | 783 | // AddRawCluster (parOk[indx], // double x |
784 | // parOk[indx+1], // double y | |
785 | // coef*qTot, // double charge | |
786 | // errOk[indx], // double fmin | |
787 | // nfit0+10*nfit+100*nMax+10000*fnCoupled, // int nfit | |
788 | // tracks, // int* tracks | |
789 | // sigCand[0][0], // double sigx | |
790 | // sigCand[0][1], // double sigy | |
791 | // dist[TMath::LocMin(nfit,dist)] // double dist | |
792 | // ); | |
793 | } | |
794 | return nfit; | |
795 | } | |
c0a16418 | 796 | |
797 | ||
798 | //_____________________________________________________________________________ | |
799 | void | |
800 | AliMUONClusterSplitterMLEM::Split(const AliMUONCluster& cluster, | |
a9c259b2 | 801 | TH2 *mlem, Double_t *coef, |
c0a16418 | 802 | TObjArray& clusterList) |
803 | { | |
804 | /// The main steering function to work with clusters of pixels in anode | |
805 | /// plane (find clusters, decouple them from each other, merge them (if | |
806 | /// necessary), pick up coupled pads, call the fitting function) | |
807 | ||
808 | Int_t nx = mlem->GetNbinsX(); | |
809 | Int_t ny = mlem->GetNbinsY(); | |
810 | Int_t nPix = fPixArray->GetEntriesFast(); | |
811 | ||
c0a16418 | 812 | Double_t cont; |
a9c259b2 | 813 | Int_t nclust = 0, indx, indx1, nxy = ny * nx; |
814 | Bool_t *used = new Bool_t[nxy]; | |
c0a16418 | 815 | |
a9c259b2 | 816 | for (Int_t j = 0; j < nxy; ++j) used[j] = kFALSE; |
c0a16418 | 817 | |
818 | TObjArray *clusters[200]={0}; | |
819 | TObjArray *pix; | |
820 | ||
821 | // Find clusters of histogram bins (easier to work in 2-D space) | |
2abdae6e | 822 | for (Int_t i = 1; i <= ny; ++i) |
c0a16418 | 823 | { |
2abdae6e | 824 | for (Int_t j = 1; j <= nx; ++j) |
c0a16418 | 825 | { |
826 | indx = (i-1)*nx + j - 1; | |
827 | if (used[indx]) continue; | |
828 | cont = mlem->GetCellContent(j,i); | |
110edb51 | 829 | if (cont < fLowestPixelCharge) continue; |
c0a16418 | 830 | pix = new TObjArray(20); |
831 | used[indx] = 1; | |
832 | pix->Add(BinToPix(mlem,j,i)); | |
833 | AddBin(mlem, i, j, 0, used, pix); // recursive call | |
834 | if (nclust >= 200) AliFatal(" Too many clusters !!!"); | |
835 | clusters[nclust++] = pix; | |
836 | } // for (Int_t j=1; j<=nx; j++) { | |
a9c259b2 | 837 | } // for (Int_t i=1; i<=ny; |
838 | if (fDebug) cout << nclust << endl; | |
2abdae6e | 839 | delete [] used; |
c0a16418 | 840 | |
841 | // Compute couplings between clusters and clusters to pads | |
842 | Int_t npad = cluster.Multiplicity(); | |
843 | ||
844 | // Exclude pads with overflows | |
a9c259b2 | 845 | /* |
2abdae6e | 846 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 847 | { |
848 | AliMUONPad* pad = cluster.Pad(j); | |
849 | if ( pad->IsSaturated() ) | |
850 | { | |
851 | pad->SetStatus(-5); | |
852 | } | |
853 | else | |
854 | { | |
855 | pad->SetStatus(0); | |
856 | } | |
857 | } | |
a9c259b2 | 858 | */ |
c0a16418 | 859 | |
a9c259b2 | 860 | // Compute couplings of clusters to pads (including overflows) |
c0a16418 | 861 | TMatrixD aijclupad(nclust,npad); |
862 | aijclupad = 0; | |
863 | Int_t npxclu; | |
2abdae6e | 864 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 865 | { |
866 | pix = clusters[iclust]; | |
867 | npxclu = pix->GetEntriesFast(); | |
2abdae6e | 868 | for (Int_t i = 0; i < npxclu; ++i) |
c0a16418 | 869 | { |
870 | indx = fPixArray->IndexOf(pix->UncheckedAt(i)); | |
2abdae6e | 871 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 872 | { |
a9c259b2 | 873 | //AliMUONPad* pad = cluster.Pad(j); |
874 | //if ( pad->Status() < 0 && pad->Status() != -5) continue; | |
c0a16418 | 875 | if (coef[j*nPix+indx] < fgkCouplMin) continue; |
876 | aijclupad(iclust,j) += coef[j*nPix+indx]; | |
877 | } | |
878 | } | |
879 | } | |
880 | ||
a9c259b2 | 881 | // Compute couplings between clusters (exclude overflows) |
c0a16418 | 882 | TMatrixD aijcluclu(nclust,nclust); |
883 | aijcluclu = 0; | |
2abdae6e | 884 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 885 | { |
2abdae6e | 886 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 887 | { |
888 | // Exclude overflows | |
a9c259b2 | 889 | //if ( cluster.Pad(j)->Status() < 0) continue; |
890 | if ( cluster.Pad(j)->IsSaturated()) continue; | |
c0a16418 | 891 | if (aijclupad(iclust,j) < fgkCouplMin) continue; |
892 | for (Int_t iclust1=iclust+1; iclust1<nclust; iclust1++) | |
893 | { | |
894 | if (aijclupad(iclust1,j) < fgkCouplMin) continue; | |
895 | aijcluclu(iclust,iclust1) += | |
896 | TMath::Sqrt (aijclupad(iclust,j)*aijclupad(iclust1,j)); | |
897 | } | |
898 | } | |
899 | } | |
2abdae6e | 900 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 901 | { |
2abdae6e | 902 | for (Int_t iclust1 = iclust+1; iclust1 < nclust; ++iclust1) |
c0a16418 | 903 | { |
904 | aijcluclu(iclust1,iclust) = aijcluclu(iclust,iclust1); | |
905 | } | |
906 | } | |
907 | ||
2abdae6e | 908 | if (fDebug && nclust > 1) aijcluclu.Print(); |
909 | ||
c0a16418 | 910 | // Find groups of coupled clusters |
911 | used = new Bool_t[nclust]; | |
a9c259b2 | 912 | for (Int_t j = 0; j < nclust; ++j) used[j] = kFALSE; |
2abdae6e | 913 | |
c0a16418 | 914 | Int_t *clustNumb = new Int_t[nclust]; |
915 | Int_t nCoupled, nForFit, minGroup[3], clustFit[3], nfit = 0; | |
2abdae6e | 916 | //Double_t parOk[8]; |
917 | Double_t parOk[8] = {0}; //AZ | |
c0a16418 | 918 | |
2abdae6e | 919 | for (Int_t igroup = 0; igroup < nclust; ++igroup) |
c0a16418 | 920 | { |
921 | if (used[igroup]) continue; | |
922 | used[igroup] = kTRUE; | |
923 | clustNumb[0] = igroup; | |
924 | nCoupled = 1; | |
925 | // Find group of coupled clusters | |
926 | AddCluster(igroup, nclust, aijcluclu, used, clustNumb, nCoupled); // recursive | |
927 | ||
2abdae6e | 928 | if (fDebug) { |
929 | cout << " nCoupled: " << nCoupled << endl; | |
930 | for (Int_t i=0; i<nCoupled; ++i) cout << clustNumb[i] << " "; cout << endl; | |
931 | } | |
c0a16418 | 932 | |
933 | fnCoupled = nCoupled; | |
934 | ||
935 | while (nCoupled > 0) | |
936 | { | |
937 | if (nCoupled < 4) | |
938 | { | |
939 | nForFit = nCoupled; | |
2abdae6e | 940 | for (Int_t i = 0; i < nCoupled; ++i) clustFit[i] = clustNumb[i]; |
c0a16418 | 941 | } |
942 | else | |
943 | { | |
944 | // Too many coupled clusters to fit - try to decouple them | |
945 | // Find the lowest coupling of 1, 2, min(3,nLinks/2) pixels with | |
946 | // all the others in the group | |
2abdae6e | 947 | for (Int_t j = 0; j < 3; ++j) minGroup[j] = -1; |
948 | Double_t coupl = MinGroupCoupl(nCoupled, clustNumb, aijcluclu, minGroup); | |
c0a16418 | 949 | |
950 | // Flag clusters for fit | |
951 | nForFit = 0; | |
d41c0c32 | 952 | while (nForFit < 3 && minGroup[nForFit] >= 0) |
c0a16418 | 953 | { |
2abdae6e | 954 | if (fDebug) cout << clustNumb[minGroup[nForFit]] << " "; |
c0a16418 | 955 | clustFit[nForFit] = clustNumb[minGroup[nForFit]]; |
956 | clustNumb[minGroup[nForFit]] -= 999; | |
957 | nForFit++; | |
958 | } | |
2abdae6e | 959 | if (fDebug) cout << " nForFit " << nForFit << " " << coupl << endl; |
c0a16418 | 960 | } // else |
961 | ||
962 | // Select pads for fit. | |
963 | if (SelectPad(cluster,nCoupled, nForFit, clustNumb, clustFit, aijclupad) < 3 && nCoupled > 1) | |
964 | { | |
965 | // Deselect pads | |
2abdae6e | 966 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 967 | { |
968 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 969 | //if ( pad->Status()==1 ) pad->SetStatus(0); |
970 | //if ( pad->Status()==-9) pad->SetStatus(-5); | |
05542040 | 971 | if ( pad->Status() == AliMUONClusterFinderMLEM::GetUseForFitFlag() || |
972 | pad->Status() == AliMUONClusterFinderMLEM::GetCoupledFlag()) | |
973 | pad->SetStatus(AliMUONClusterFinderMLEM::GetZeroFlag()); | |
c0a16418 | 974 | } |
975 | // Merge the failed cluster candidates (with too few pads to fit) with | |
976 | // the one with the strongest coupling | |
977 | Merge(cluster,nForFit, nCoupled, clustNumb, clustFit, clusters, aijcluclu, aijclupad); | |
978 | } | |
979 | else | |
980 | { | |
981 | // Do the fit | |
b161da28 | 982 | nfit = Fit(cluster,0, nForFit, clustFit, clusters, parOk, clusterList, mlem); |
2abdae6e | 983 | if (nfit == 0) { |
a9c259b2 | 984 | //cout << " (nfit == 0) " << fNpar << " " << cluster.Multiplicity() << endl; |
985 | fNpar = 0; // should be 0 by itself but just in case ... | |
2abdae6e | 986 | } |
c0a16418 | 987 | } |
988 | ||
989 | // Subtract the fitted charges from pads with strong coupling and/or | |
990 | // return pads for further use | |
991 | UpdatePads(cluster,nfit, parOk); | |
992 | ||
993 | // Mark used pads | |
2abdae6e | 994 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 995 | { |
996 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 997 | //if ( pad->Status()==1 ) pad->SetStatus(-2); |
998 | //if ( pad->Status()==-9) pad->SetStatus(-5); | |
05542040 | 999 | if ( pad->Status() == AliMUONClusterFinderMLEM::GetUseForFitFlag() ) |
1000 | pad->SetStatus(AliMUONClusterFinderMLEM::GetModifiedFlag()); | |
c0a16418 | 1001 | } |
1002 | ||
1003 | // Sort the clusters (move to the right the used ones) | |
1004 | Int_t beg = 0, end = nCoupled - 1; | |
1005 | while (beg < end) | |
1006 | { | |
1007 | if (clustNumb[beg] >= 0) { ++beg; continue; } | |
2abdae6e | 1008 | for (Int_t j = end; j > beg; --j) |
c0a16418 | 1009 | { |
1010 | if (clustNumb[j] < 0) continue; | |
1011 | end = j - 1; | |
1012 | indx = clustNumb[beg]; | |
1013 | clustNumb[beg] = clustNumb[j]; | |
1014 | clustNumb[j] = indx; | |
1015 | break; | |
1016 | } | |
1017 | ++beg; | |
1018 | } | |
1019 | ||
1020 | nCoupled -= nForFit; | |
1021 | if (nCoupled > 3) | |
1022 | { | |
1023 | // Remove couplings of used clusters | |
2abdae6e | 1024 | for (Int_t iclust = nCoupled; iclust < nCoupled+nForFit; ++iclust) |
c0a16418 | 1025 | { |
1026 | indx = clustNumb[iclust] + 999; | |
2abdae6e | 1027 | for (Int_t iclust1 = 0; iclust1 < nCoupled; ++iclust1) |
c0a16418 | 1028 | { |
1029 | indx1 = clustNumb[iclust1]; | |
1030 | aijcluclu(indx,indx1) = aijcluclu(indx1,indx) = 0; | |
1031 | } | |
1032 | } | |
1033 | ||
a9c259b2 | 1034 | // Update the remaining clusters couplings (subtract couplings from |
1035 | // the used pads) - overflows excluded | |
2abdae6e | 1036 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 1037 | { |
1038 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1039 | //if ( pad->Status() != -2) continue; |
05542040 | 1040 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetModifiedFlag()) continue; |
c0a16418 | 1041 | for (Int_t iclust=0; iclust<nCoupled; ++iclust) |
1042 | { | |
1043 | indx = clustNumb[iclust]; | |
1044 | if (aijclupad(indx,j) < fgkCouplMin) continue; | |
2abdae6e | 1045 | for (Int_t iclust1 = iclust+1; iclust1 < nCoupled; ++iclust1) |
c0a16418 | 1046 | { |
1047 | indx1 = clustNumb[iclust1]; | |
1048 | if (aijclupad(indx1,j) < fgkCouplMin) continue; | |
1049 | // Check this | |
1050 | aijcluclu(indx,indx1) -= | |
1051 | TMath::Sqrt (aijclupad(indx,j)*aijclupad(indx1,j)); | |
1052 | aijcluclu(indx1,indx) = aijcluclu(indx,indx1); | |
1053 | } | |
1054 | } | |
a9c259b2 | 1055 | //pad->SetStatus(-8); |
05542040 | 1056 | pad->SetStatus(AliMUONClusterFinderMLEM::GetOverFlag()); |
c0a16418 | 1057 | } // for (Int_t j=0; j<npad; |
1058 | } // if (nCoupled > 3) | |
1059 | } // while (nCoupled > 0) | |
1060 | } // for (Int_t igroup=0; igroup<nclust; | |
1061 | ||
2abdae6e | 1062 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 1063 | { |
1064 | pix = clusters[iclust]; | |
1065 | pix->Clear(); | |
1066 | delete pix; | |
c0a16418 | 1067 | } |
1068 | delete [] clustNumb; | |
c0a16418 | 1069 | delete [] used; |
c0a16418 | 1070 | |
1071 | } | |
1072 | ||
1073 | //_____________________________________________________________________________ | |
1074 | void | |
1075 | AliMUONClusterSplitterMLEM::Merge(const AliMUONCluster& cluster, | |
1076 | Int_t nForFit, Int_t nCoupled, | |
57e2ad1a | 1077 | const Int_t *clustNumb, const Int_t *clustFit, |
c0a16418 | 1078 | TObjArray **clusters, |
1079 | TMatrixD& aijcluclu, TMatrixD& aijclupad) | |
1080 | { | |
1081 | /// Merge the group of clusters with the one having the strongest coupling with them | |
1082 | ||
1083 | Int_t indx, indx1, npxclu, npxclu1, imax=0; | |
1084 | TObjArray *pix, *pix1; | |
1085 | Double_t couplMax; | |
1086 | ||
2abdae6e | 1087 | for (Int_t icl = 0; icl < nForFit; ++icl) |
c0a16418 | 1088 | { |
1089 | indx = clustFit[icl]; | |
1090 | pix = clusters[indx]; | |
1091 | npxclu = pix->GetEntriesFast(); | |
1092 | couplMax = -1; | |
2abdae6e | 1093 | for (Int_t icl1 = 0; icl1 < nCoupled; ++icl1) |
c0a16418 | 1094 | { |
1095 | indx1 = clustNumb[icl1]; | |
1096 | if (indx1 < 0) continue; | |
1097 | if ( aijcluclu(indx,indx1) > couplMax) | |
1098 | { | |
1099 | couplMax = aijcluclu(indx,indx1); | |
1100 | imax = indx1; | |
1101 | } | |
1102 | } // for (Int_t icl1=0; | |
1103 | // Add to it | |
1104 | pix1 = clusters[imax]; | |
1105 | npxclu1 = pix1->GetEntriesFast(); | |
1106 | // Add pixels | |
2abdae6e | 1107 | for (Int_t i = 0; i < npxclu; ++i) |
c0a16418 | 1108 | { |
1109 | pix1->Add(pix->UncheckedAt(i)); | |
1110 | pix->RemoveAt(i); | |
1111 | } | |
1112 | ||
1113 | //Add cluster-to-cluster couplings | |
2abdae6e | 1114 | for (Int_t icl1 = 0; icl1 < nCoupled; ++icl1) |
c0a16418 | 1115 | { |
1116 | indx1 = clustNumb[icl1]; | |
1117 | if (indx1 < 0 || indx1 == imax) continue; | |
1118 | aijcluclu(indx1,imax) += aijcluclu(indx,indx1); | |
1119 | aijcluclu(imax,indx1) = aijcluclu(indx1,imax); | |
1120 | } | |
1121 | aijcluclu(indx,imax) = aijcluclu(imax,indx) = 0; | |
1122 | ||
1123 | //Add cluster-to-pad couplings | |
2abdae6e | 1124 | Int_t mult = cluster.Multiplicity(); |
1125 | for (Int_t j = 0; j < mult; ++j) | |
c0a16418 | 1126 | { |
1127 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1128 | //if ( pad->Status() < 0 && pad->Status() != -5 ) continue;// exclude used pads |
05542040 | 1129 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetZeroFlag()) continue;// exclude used pads |
c0a16418 | 1130 | aijclupad(imax,j) += aijclupad(indx,j); |
1131 | aijclupad(indx,j) = 0; | |
1132 | } | |
1133 | } // for (Int_t icl=0; icl<nForFit; | |
1134 | } | |
1135 | ||
1136 | ||
1137 | //_____________________________________________________________________________ | |
1138 | Double_t | |
57e2ad1a | 1139 | AliMUONClusterSplitterMLEM::MinGroupCoupl(Int_t nCoupled, const Int_t *clustNumb, |
1140 | const TMatrixD& aijcluclu, Int_t *minGroup) | |
c0a16418 | 1141 | { |
1142 | /// Find group of clusters with minimum coupling to all the others | |
1143 | ||
1144 | Int_t i123max = TMath::Min(3,nCoupled/2); | |
1145 | Int_t indx, indx1, indx2, indx3, nTot = 0; | |
1146 | Double_t *coupl1 = 0, *coupl2 = 0, *coupl3 = 0; | |
1147 | ||
2abdae6e | 1148 | for (Int_t i123 = 1; i123 <= i123max; ++i123) { |
c0a16418 | 1149 | |
1150 | if (i123 == 1) { | |
1151 | coupl1 = new Double_t [nCoupled]; | |
2abdae6e | 1152 | for (Int_t i = 0; i < nCoupled; ++i) coupl1[i] = 0; |
c0a16418 | 1153 | } |
1154 | else if (i123 == 2) { | |
1155 | nTot = nCoupled*nCoupled; | |
1156 | coupl2 = new Double_t [nTot]; | |
2abdae6e | 1157 | for (Int_t i = 0; i < nTot; ++i) coupl2[i] = 9999; |
c0a16418 | 1158 | } else { |
1159 | nTot = nTot*nCoupled; | |
1160 | coupl3 = new Double_t [nTot]; | |
2abdae6e | 1161 | for (Int_t i = 0; i < nTot; ++i) coupl3[i] = 9999; |
c0a16418 | 1162 | } // else |
1163 | ||
2abdae6e | 1164 | for (Int_t i = 0; i < nCoupled; ++i) { |
c0a16418 | 1165 | indx1 = clustNumb[i]; |
2abdae6e | 1166 | for (Int_t j = i+1; j < nCoupled; ++j) { |
c0a16418 | 1167 | indx2 = clustNumb[j]; |
1168 | if (i123 == 1) { | |
1169 | coupl1[i] += aijcluclu(indx1,indx2); | |
1170 | coupl1[j] += aijcluclu(indx1,indx2); | |
1171 | } | |
1172 | else if (i123 == 2) { | |
1173 | indx = i*nCoupled + j; | |
1174 | coupl2[indx] = coupl1[i] + coupl1[j]; | |
1175 | coupl2[indx] -= 2 * (aijcluclu(indx1,indx2)); | |
1176 | } else { | |
2abdae6e | 1177 | for (Int_t k = j+1; k < nCoupled; ++k) { |
c0a16418 | 1178 | indx3 = clustNumb[k]; |
1179 | indx = i*nCoupled*nCoupled + j*nCoupled + k; | |
1180 | coupl3[indx] = coupl2[i*nCoupled+j] + coupl1[k]; | |
1181 | coupl3[indx] -= 2 * (aijcluclu(indx1,indx3)+aijcluclu(indx2,indx3)); | |
1182 | } | |
1183 | } // else | |
1184 | } // for (Int_t j=i+1; | |
1185 | } // for (Int_t i=0; | |
1186 | } // for (Int_t i123=1; | |
1187 | ||
1188 | // Find minimum coupling | |
1189 | Double_t couplMin = 9999; | |
1190 | Int_t locMin = 0; | |
1191 | ||
2abdae6e | 1192 | for (Int_t i123 = 1; i123 <= i123max; ++i123) { |
c0a16418 | 1193 | if (i123 == 1) { |
1194 | locMin = TMath::LocMin(nCoupled, coupl1); | |
1195 | couplMin = coupl1[locMin]; | |
1196 | minGroup[0] = locMin; | |
2abdae6e | 1197 | delete [] coupl1; |
c0a16418 | 1198 | } |
1199 | else if (i123 == 2) { | |
1200 | locMin = TMath::LocMin(nCoupled*nCoupled, coupl2); | |
1201 | if (coupl2[locMin] < couplMin) { | |
1202 | couplMin = coupl2[locMin]; | |
1203 | minGroup[0] = locMin/nCoupled; | |
1204 | minGroup[1] = locMin%nCoupled; | |
1205 | } | |
2abdae6e | 1206 | delete [] coupl2; |
c0a16418 | 1207 | } else { |
1208 | locMin = TMath::LocMin(nTot, coupl3); | |
1209 | if (coupl3[locMin] < couplMin) { | |
1210 | couplMin = coupl3[locMin]; | |
1211 | minGroup[0] = locMin/nCoupled/nCoupled; | |
1212 | minGroup[1] = locMin%(nCoupled*nCoupled)/nCoupled; | |
1213 | minGroup[2] = locMin%nCoupled; | |
1214 | } | |
2abdae6e | 1215 | delete [] coupl3; |
c0a16418 | 1216 | } // else |
1217 | } // for (Int_t i123=1; | |
1218 | return couplMin; | |
1219 | } | |
1220 | ||
1221 | //_____________________________________________________________________________ | |
1222 | Int_t | |
1223 | AliMUONClusterSplitterMLEM::SelectPad(const AliMUONCluster& cluster, | |
1224 | Int_t nCoupled, Int_t nForFit, | |
57e2ad1a | 1225 | const Int_t *clustNumb, const Int_t *clustFit, |
1226 | const TMatrixD& aijclupad) | |
c0a16418 | 1227 | { |
1228 | /// Select pads for fit. If too many coupled clusters, find pads giving | |
1229 | /// the strongest coupling with the rest of clusters and exclude them from the fit. | |
1230 | ||
1231 | Int_t npad = cluster.Multiplicity(); | |
1232 | Double_t *padpix = 0; | |
1233 | ||
1234 | if (nCoupled > 3) | |
1235 | { | |
1236 | padpix = new Double_t[npad]; | |
a9c259b2 | 1237 | for (Int_t i = 0; i < npad; ++i) padpix[i] = 0.; |
c0a16418 | 1238 | } |
1239 | ||
1240 | Int_t nOK = 0, indx, indx1; | |
2abdae6e | 1241 | for (Int_t iclust = 0; iclust < nForFit; ++iclust) |
c0a16418 | 1242 | { |
1243 | indx = clustFit[iclust]; | |
2abdae6e | 1244 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 1245 | { |
1246 | if ( aijclupad(indx,j) < fgkCouplMin) continue; | |
1247 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1248 | /* |
2abdae6e | 1249 | if ( pad->Status() == -5 ) pad->SetStatus(-9); // flag overflow |
c0a16418 | 1250 | if ( pad->Status() < 0 ) continue; // exclude overflows and used pads |
1251 | if ( !pad->Status() ) | |
1252 | { | |
1253 | pad->SetStatus(1); | |
1254 | ++nOK; // pad to be used in fit | |
1255 | } | |
a9c259b2 | 1256 | */ |
05542040 | 1257 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetZeroFlag() |
a9c259b2 | 1258 | || pad->IsSaturated() ) continue; // used pads and overflows |
05542040 | 1259 | pad->SetStatus(AliMUONClusterFinderMLEM::GetUseForFitFlag()); |
a9c259b2 | 1260 | ++nOK; // pad to be used in fit |
1261 | ||
c0a16418 | 1262 | if (nCoupled > 3) |
1263 | { | |
1264 | // Check other clusters | |
2abdae6e | 1265 | for (Int_t iclust1 = 0; iclust1 < nCoupled; ++iclust1) |
c0a16418 | 1266 | { |
1267 | indx1 = clustNumb[iclust1]; | |
1268 | if (indx1 < 0) continue; | |
1269 | if ( aijclupad(indx1,j) < fgkCouplMin ) continue; | |
1270 | padpix[j] += aijclupad(indx1,j); | |
1271 | } | |
1272 | } // if (nCoupled > 3) | |
1273 | } // for (Int_t j=0; j<npad; | |
1274 | } // for (Int_t iclust=0; iclust<nForFit | |
1275 | if (nCoupled < 4) return nOK; | |
1276 | ||
1277 | Double_t aaa = 0; | |
2abdae6e | 1278 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 1279 | { |
1280 | if (padpix[j] < fgkCouplMin) continue; | |
1281 | aaa += padpix[j]; | |
a9c259b2 | 1282 | //cluster.Pad(j)->SetStatus(-1); // exclude pads with strong coupling to the other clusters |
05542040 | 1283 | cluster.Pad(j)->SetStatus(AliMUONClusterFinderMLEM::GetCoupledFlag()); // exclude pads with strong coupling to the other clusters |
c0a16418 | 1284 | nOK--; |
1285 | } | |
1286 | delete [] padpix; | |
c0a16418 | 1287 | return nOK; |
1288 | } | |
1289 | ||
1290 | //_____________________________________________________________________________ | |
1291 | void | |
1292 | AliMUONClusterSplitterMLEM::UpdatePads(const AliMUONCluster& cluster, | |
1293 | Int_t /*nfit*/, Double_t *par) | |
1294 | { | |
1295 | /// Subtract the fitted charges from pads with strong coupling | |
1296 | ||
a9c259b2 | 1297 | Int_t indx, mult = cluster.Multiplicity(), iend = fNpar/3; |
c0a16418 | 1298 | Double_t charge, coef=0; |
1299 | ||
2abdae6e | 1300 | for (Int_t j = 0; j < mult; ++j) |
c0a16418 | 1301 | { |
1302 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1303 | //if ( pad->Status() != -1 ) continue; |
05542040 | 1304 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetCoupledFlag() ) continue; |
c0a16418 | 1305 | if (fNpar != 0) |
1306 | { | |
1307 | charge = 0; | |
a9c259b2 | 1308 | for (Int_t i = 0; i <= iend; ++i) |
c0a16418 | 1309 | { |
a9c259b2 | 1310 | // sum over hits |
1311 | indx = 3 * i; | |
1312 | coef = Param2Coef(i, coef, par); | |
9bbd7f60 | 1313 | charge += ChargeIntegration(par[indx],par[indx+1],*pad) * coef; |
c0a16418 | 1314 | } |
1315 | charge *= fQtot; | |
1316 | pad->SetCharge(pad->Charge()-charge); | |
1317 | } // if (fNpar != 0) | |
1318 | ||
a9c259b2 | 1319 | //if (pad->Charge() > 6 /*fgkZeroSuppression*/) pad->SetStatus(0); |
110edb51 | 1320 | if (pad->Charge() > fLowestPadCharge) pad->SetStatus(AliMUONClusterFinderMLEM::GetZeroFlag()); |
c0a16418 | 1321 | // return pad for further using // FIXME: remove usage of zerosuppression here |
05542040 | 1322 | else pad->SetStatus(AliMUONClusterFinderMLEM::GetOverFlag()); // do not use anymore |
c0a16418 | 1323 | |
1324 | } // for (Int_t j=0; | |
1325 | } | |
1326 | ||
1327 |