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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, | |
bf0d3528 | 60 | TObjArray* pixArray) |
c0a16418 | 61 | : TObject(), |
bf0d3528 | 62 | fPixArray(pixArray), |
c0a16418 | 63 | fMathieson(0x0), |
64 | fDetElemId(detElemId), | |
65 | fNpar(0), | |
66 | fQtot(0), | |
9bbd7f60 | 67 | fnCoupled(0), |
68 | fDebug(0) | |
c0a16418 | 69 | { |
70 | /// Constructor | |
71 | ||
4e51cfd2 | 72 | AliMq::Station12Type stationType = AliMpDEManager::GetStation12Type(fDetElemId); |
c0a16418 | 73 | |
74 | Float_t kx3 = AliMUONConstants::SqrtKx3(); | |
75 | Float_t ky3 = AliMUONConstants::SqrtKy3(); | |
76 | Float_t pitch = AliMUONConstants::Pitch(); | |
77 | ||
4e51cfd2 | 78 | if ( stationType == AliMq::kStation1 ) |
c0a16418 | 79 | { |
80 | kx3 = AliMUONConstants::SqrtKx3St1(); | |
81 | ky3 = AliMUONConstants::SqrtKy3St1(); | |
82 | pitch = AliMUONConstants::PitchSt1(); | |
83 | } | |
84 | ||
85 | fMathieson = new AliMUONMathieson; | |
86 | ||
87 | fMathieson->SetPitch(pitch); | |
88 | fMathieson->SetSqrtKx3AndDeriveKx2Kx4(kx3); | |
89 | fMathieson->SetSqrtKy3AndDeriveKy2Ky4(ky3); | |
90 | ||
91 | } | |
92 | ||
93 | //_____________________________________________________________________________ | |
94 | AliMUONClusterSplitterMLEM::~AliMUONClusterSplitterMLEM() | |
95 | { | |
71a2d3aa | 96 | /// Destructor |
97 | ||
c0a16418 | 98 | delete fMathieson; |
99 | } | |
100 | ||
101 | //_____________________________________________________________________________ | |
102 | void | |
103 | AliMUONClusterSplitterMLEM::AddBin(TH2 *mlem, | |
104 | Int_t ic, Int_t jc, Int_t mode, | |
105 | Bool_t *used, TObjArray *pix) | |
106 | { | |
107 | /// Add a bin to the cluster | |
108 | ||
109 | Int_t nx = mlem->GetNbinsX(); | |
110 | Int_t ny = mlem->GetNbinsY(); | |
111 | Double_t cont1, cont = mlem->GetCellContent(jc,ic); | |
112 | AliMUONPad *pixPtr = 0; | |
113 | ||
2abdae6e | 114 | Int_t ie = TMath::Min(ic+1,ny), je = TMath::Min(jc+1,nx); |
115 | for (Int_t i = TMath::Max(ic-1,1); i <= ie; ++i) { | |
116 | for (Int_t j = TMath::Max(jc-1,1); j <= je; ++j) { | |
c0a16418 | 117 | if (i != ic && j != jc) continue; |
118 | if (used[(i-1)*nx+j-1]) continue; | |
119 | cont1 = mlem->GetCellContent(j,i); | |
120 | if (mode && cont1 > cont) continue; | |
121 | used[(i-1)*nx+j-1] = kTRUE; | |
122 | if (cont1 < 0.5) continue; | |
123 | if (pix) pix->Add(BinToPix(mlem,j,i)); | |
124 | else { | |
125 | pixPtr = new AliMUONPad (mlem->GetXaxis()->GetBinCenter(j), | |
a9c259b2 | 126 | mlem->GetYaxis()->GetBinCenter(i), 0, 0, cont1); |
2abdae6e | 127 | fPixArray->Add(pixPtr); |
c0a16418 | 128 | } |
129 | AddBin(mlem, i, j, mode, used, pix); // recursive call | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | //_____________________________________________________________________________ | |
135 | void | |
136 | AliMUONClusterSplitterMLEM::AddCluster(Int_t ic, Int_t nclust, | |
137 | TMatrixD& aijcluclu, | |
138 | Bool_t *used, Int_t *clustNumb, Int_t &nCoupled) | |
139 | { | |
140 | /// Add a cluster to the group of coupled clusters | |
141 | ||
2abdae6e | 142 | for (Int_t i = 0; i < nclust; ++i) { |
c0a16418 | 143 | if (used[i]) continue; |
144 | if (aijcluclu(i,ic) < fgkCouplMin) continue; | |
145 | used[i] = kTRUE; | |
146 | clustNumb[nCoupled++] = i; | |
147 | AddCluster(i, nclust, aijcluclu, used, clustNumb, nCoupled); | |
148 | } | |
149 | } | |
150 | ||
151 | //_____________________________________________________________________________ | |
152 | TObject* | |
153 | AliMUONClusterSplitterMLEM::BinToPix(TH2 *mlem, | |
154 | Int_t jc, Int_t ic) | |
155 | { | |
156 | /// Translate histogram bin to pixel | |
157 | ||
158 | Double_t yc = mlem->GetYaxis()->GetBinCenter(ic); | |
159 | Double_t xc = mlem->GetXaxis()->GetBinCenter(jc); | |
160 | ||
161 | Int_t nPix = fPixArray->GetEntriesFast(); | |
162 | AliMUONPad *pixPtr = NULL; | |
163 | ||
164 | // Compare pixel and bin positions | |
2abdae6e | 165 | for (Int_t i = 0; i < nPix; ++i) { |
c0a16418 | 166 | pixPtr = (AliMUONPad*) fPixArray->UncheckedAt(i); |
167 | if (pixPtr->Charge() < 0.5) continue; | |
168 | if (TMath::Abs(pixPtr->Coord(0)-xc)<1.e-4 && TMath::Abs(pixPtr->Coord(1)-yc)<1.e-4) | |
169 | { | |
2abdae6e | 170 | //return (TObject*) pixPtr; |
171 | return pixPtr; | |
c0a16418 | 172 | } |
173 | } | |
174 | AliError(Form(" Something wrong ??? %f %f ", xc, yc)); | |
175 | return NULL; | |
176 | } | |
177 | ||
178 | //_____________________________________________________________________________ | |
179 | Float_t | |
180 | AliMUONClusterSplitterMLEM::ChargeIntegration(Double_t x, Double_t y, | |
181 | const AliMUONPad& pad) | |
182 | { | |
183 | /// Compute the Mathieson integral on pad area, assuming the center | |
184 | /// of the Mathieson is at (x,y) | |
185 | ||
186 | TVector2 lowerLeft(TVector2(x,y)-pad.Position()-pad.Dimensions()); | |
187 | TVector2 upperRight(lowerLeft + pad.Dimensions()*2.0); | |
188 | ||
189 | return fMathieson->IntXY(lowerLeft.X(),lowerLeft.Y(), | |
190 | upperRight.X(),upperRight.Y()); | |
191 | } | |
192 | ||
193 | //_____________________________________________________________________________ | |
194 | void | |
195 | AliMUONClusterSplitterMLEM::Fcn1(const AliMUONCluster& cluster, | |
196 | Int_t & /*fNpar*/, Double_t * /*gin*/, | |
a9c259b2 | 197 | Double_t &f, Double_t *par, Int_t iflag) |
c0a16418 | 198 | { |
a9c259b2 | 199 | /// Computes the functional to be minimized |
c0a16418 | 200 | |
201 | Int_t indx, npads=0; | |
202 | Double_t charge, delta, coef=0, chi2=0, qTot = 0; | |
a9c259b2 | 203 | static Double_t qAver = 0; |
c0a16418 | 204 | |
a9c259b2 | 205 | Int_t mult = cluster.Multiplicity(), iend = fNpar / 3; |
2abdae6e | 206 | for (Int_t j = 0; j < mult; ++j) |
c0a16418 | 207 | { |
208 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 209 | //if ( pad->Status() !=1 || pad->IsSaturated() ) continue; |
05542040 | 210 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetUseForFitFlag()) continue; |
a9c259b2 | 211 | if (iflag == 0) { |
212 | if ( pad->IsReal() ) npads++; // exclude virtual pads | |
213 | qTot += pad->Charge(); | |
214 | } | |
c0a16418 | 215 | charge = 0; |
a9c259b2 | 216 | for (Int_t i = 0; i <= iend; ++i) |
217 | { | |
218 | // sum over hits | |
219 | indx = 3 * i; | |
220 | coef = Param2Coef(i, coef, par); | |
9bbd7f60 | 221 | charge += ChargeIntegration(par[indx],par[indx+1],*pad) * coef; |
c0a16418 | 222 | } |
223 | charge *= fQtot; | |
a9c259b2 | 224 | delta = charge - pad->Charge(); |
c0a16418 | 225 | delta *= delta; |
a9c259b2 | 226 | delta /= pad->Charge(); |
c0a16418 | 227 | chi2 += delta; |
228 | } // for (Int_t j=0; | |
a9c259b2 | 229 | if (iflag == 0) qAver = qTot / npads; |
230 | f = chi2 / qAver; | |
231 | } | |
232 | ||
233 | //_____________________________________________________________________________ | |
234 | Double_t AliMUONClusterSplitterMLEM::Param2Coef(Int_t icand, Double_t coef, Double_t *par) | |
235 | { | |
236 | /// Extract hit contribution scale factor from fit parameters | |
237 | ||
238 | if (fNpar == 2) return 1.; | |
239 | if (fNpar == 5) return icand==0 ? par[2] : TMath::Max(1.-par[2],0.); | |
240 | if (icand == 0) return par[2]; | |
241 | if (icand == 1) return TMath::Max((1.-par[2])*par[5], 0.); | |
242 | return TMath::Max(1.-par[2]-coef,0.); | |
c0a16418 | 243 | } |
244 | ||
245 | //_____________________________________________________________________________ | |
246 | Int_t | |
247 | AliMUONClusterSplitterMLEM::Fit(const AliMUONCluster& cluster, | |
248 | Int_t iSimple, Int_t nfit, | |
249 | Int_t *clustFit, TObjArray **clusters, | |
250 | Double_t *parOk, | |
b161da28 | 251 | TObjArray& clusterList, TH2 *mlem) |
c0a16418 | 252 | { |
a9c259b2 | 253 | /// Steering function and fitting procedure for the fit of pad charge distribution |
c0a16418 | 254 | |
255 | // AliDebug(2,Form("iSimple=%d nfit=%d",iSimple,nfit)); | |
256 | ||
c0a16418 | 257 | Double_t xmin = mlem->GetXaxis()->GetXmin() - mlem->GetXaxis()->GetBinWidth(1); |
258 | Double_t xmax = mlem->GetXaxis()->GetXmax() + mlem->GetXaxis()->GetBinWidth(1); | |
259 | Double_t ymin = mlem->GetYaxis()->GetXmin() - mlem->GetYaxis()->GetBinWidth(1); | |
260 | Double_t ymax = mlem->GetYaxis()->GetXmax() + mlem->GetYaxis()->GetBinWidth(1); | |
a9c259b2 | 261 | Double_t xPad = 0, yPad = 99999; |
c0a16418 | 262 | |
263 | // Number of pads to use and number of virtual pads | |
264 | Int_t npads = 0, nVirtual = 0, nfit0 = nfit; | |
9bbd7f60 | 265 | //cluster.Print("full"); |
2abdae6e | 266 | Int_t mult = cluster.Multiplicity(); |
267 | for (Int_t i = 0; i < mult; ++i ) | |
c0a16418 | 268 | { |
269 | AliMUONPad* pad = cluster.Pad(i); | |
9bbd7f60 | 270 | if ( !pad->IsReal() ) ++nVirtual; |
a9c259b2 | 271 | //if ( pad->Status() !=1 || pad->IsSaturated() ) continue; |
05542040 | 272 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetUseForFitFlag() ) continue; |
9bbd7f60 | 273 | if ( pad->IsReal() ) |
c0a16418 | 274 | { |
275 | ++npads; | |
276 | if (yPad > 9999) | |
277 | { | |
a9c259b2 | 278 | xPad = pad->X(); |
279 | yPad = pad->Y(); | |
c0a16418 | 280 | } |
281 | else | |
282 | { | |
a9c259b2 | 283 | if (pad->DY() < pad->DX() ) |
c0a16418 | 284 | { |
a9c259b2 | 285 | yPad = pad->Y(); |
c0a16418 | 286 | } |
287 | else | |
288 | { | |
a9c259b2 | 289 | xPad = pad->X(); |
c0a16418 | 290 | } |
291 | } | |
292 | } | |
293 | } | |
294 | ||
295 | fNpar = 0; | |
296 | fQtot = 0; | |
297 | ||
298 | if (npads < 2) return 0; | |
299 | ||
300 | // FIXME : AliWarning("Reconnect the following code for hit/track passing ?"); | |
301 | ||
302 | // Int_t tracks[3] = {-1, -1, -1}; | |
303 | ||
304 | /* | |
305 | Int_t digit = 0; | |
306 | AliMUONDigit *mdig = 0; | |
307 | for (Int_t cath=0; cath<2; cath++) { | |
308 | for (Int_t i=0; i<fnPads[0]+fnPads[1]; i++) { | |
309 | if (fPadIJ[0][i] != cath) continue; | |
310 | if (fPadIJ[1][i] != 1) continue; | |
311 | if (fXyq[3][i] < 0) continue; // exclude virtual pads | |
312 | digit = TMath::Nint (fXyq[5][i]); | |
313 | if (digit >= 0) mdig = fInput->Digit(cath,digit); | |
314 | else mdig = fInput->Digit(TMath::Even(cath),-digit-1); | |
315 | //if (!mdig) mdig = fInput->Digit(TMath::Even(cath),digit); | |
316 | if (!mdig) continue; // protection for cluster display | |
317 | if (mdig->Hit() >= 0) { | |
318 | if (tracks[0] < 0) { | |
319 | tracks[0] = mdig->Hit(); | |
320 | tracks[1] = mdig->Track(0); | |
321 | } else if (mdig->Track(0) < tracks[1]) { | |
322 | tracks[0] = mdig->Hit(); | |
323 | tracks[1] = mdig->Track(0); | |
324 | } | |
325 | } | |
326 | if (mdig->Track(1) >= 0 && mdig->Track(1) != tracks[1]) { | |
327 | if (tracks[2] < 0) tracks[2] = mdig->Track(1); | |
328 | else tracks[2] = TMath::Min (tracks[2], mdig->Track(1)); | |
329 | } | |
330 | } // for (Int_t i=0; | |
331 | } // for (Int_t cath=0; | |
332 | */ | |
333 | ||
334 | // Get number of pads in X and Y | |
a9c259b2 | 335 | //const Int_t kStatusToTest(1); |
05542040 | 336 | const Int_t kStatusToTest(AliMUONClusterFinderMLEM::GetUseForFitFlag()); |
c0a16418 | 337 | |
168e9c4d | 338 | Long_t nofPads = cluster.NofPads(kStatusToTest); |
339 | Int_t nInX = AliMp::PairFirst(nofPads); | |
340 | Int_t nInY = AliMp::PairSecond(nofPads); | |
9bbd7f60 | 341 | |
342 | if (fDebug) { | |
343 | Int_t npadOK = 0; | |
344 | for (Int_t j = 0; j < cluster.Multiplicity(); ++j) { | |
345 | AliMUONPad *pad = cluster.Pad(j); | |
a9c259b2 | 346 | //if (pad->Status() == 1 && !pad->IsSaturated()) npadOK++; |
05542040 | 347 | if (pad->Status() == AliMUONClusterFinderMLEM::GetUseForFitFlag() && !pad->IsSaturated()) npadOK++; |
9bbd7f60 | 348 | } |
349 | cout << " Number of pads to fit: " << npadOK << endl; | |
350 | cout << " nInX and Y: " << nInX << " " << nInY << endl; | |
351 | } | |
c0a16418 | 352 | |
353 | Int_t nfitMax = 3; | |
354 | nfitMax = TMath::Min (nfitMax, (npads + 1) / 3); | |
355 | if (nfitMax > 1) { | |
94bf739c | 356 | if (((nInX < 3) && (nInY < 3)) || ((nInX == 3) && (nInY < 3)) || ((nInX < 3) && (nInY == 3))) nfitMax = 1; // not enough pads in each direction |
c0a16418 | 357 | } |
358 | if (nfit > nfitMax) nfit = nfitMax; | |
359 | ||
360 | // Take cluster maxima as fitting seeds | |
361 | TObjArray *pix; | |
362 | AliMUONPad *pixPtr; | |
363 | Int_t npxclu; | |
364 | Double_t cont, cmax = 0, xseed = 0, yseed = 0, errOk[8], qq = 0; | |
365 | Double_t xyseed[3][2], qseed[3], xyCand[3][2] = {{0},{0}}, sigCand[3][2] = {{0},{0}}; | |
366 | ||
2abdae6e | 367 | for (Int_t ifit = 1; ifit <= nfit0; ++ifit) |
c0a16418 | 368 | { |
369 | cmax = 0; | |
370 | pix = clusters[clustFit[ifit-1]]; | |
371 | npxclu = pix->GetEntriesFast(); | |
372 | //qq = 0; | |
2abdae6e | 373 | for (Int_t clu = 0; clu < npxclu; ++clu) |
c0a16418 | 374 | { |
375 | pixPtr = (AliMUONPad*) pix->UncheckedAt(clu); | |
376 | cont = pixPtr->Charge(); | |
377 | fQtot += cont; | |
378 | if (cont > cmax) | |
379 | { | |
380 | cmax = cont; | |
381 | xseed = pixPtr->Coord(0); | |
382 | yseed = pixPtr->Coord(1); | |
383 | } | |
384 | qq += cont; | |
385 | xyCand[0][0] += pixPtr->Coord(0) * cont; | |
386 | xyCand[0][1] += pixPtr->Coord(1) * cont; | |
387 | sigCand[0][0] += pixPtr->Coord(0) * pixPtr->Coord(0) * cont; | |
388 | sigCand[0][1] += pixPtr->Coord(1) * pixPtr->Coord(1) * cont; | |
389 | } | |
390 | xyseed[ifit-1][0] = xseed; | |
391 | xyseed[ifit-1][1] = yseed; | |
392 | qseed[ifit-1] = cmax; | |
393 | } // for (Int_t ifit=1; | |
394 | ||
395 | xyCand[0][0] /= qq; // <x> | |
396 | xyCand[0][1] /= qq; // <y> | |
397 | sigCand[0][0] = sigCand[0][0]/qq - xyCand[0][0]*xyCand[0][0]; // <x^2> - <x>^2 | |
398 | sigCand[0][0] = sigCand[0][0] > 0 ? TMath::Sqrt (sigCand[0][0]) : 0; | |
399 | sigCand[0][1] = sigCand[0][1]/qq - xyCand[0][1]*xyCand[0][1]; // <y^2> - <y>^2 | |
400 | sigCand[0][1] = sigCand[0][1] > 0 ? TMath::Sqrt (sigCand[0][1]) : 0; | |
9bbd7f60 | 401 | if (fDebug) cout << xyCand[0][0] << " " << xyCand[0][1] << " " << sigCand[0][0] << " " << sigCand[0][1] << endl; |
c0a16418 | 402 | |
403 | Int_t nDof, maxSeed[3];//, nMax = 0; | |
c0a16418 | 404 | |
a9c259b2 | 405 | TMath::Sort(nfit0, qseed, maxSeed, kTRUE); // in decreasing order |
c0a16418 | 406 | |
a9c259b2 | 407 | Double_t step[3]={0.01,0.002,0.02}, fmin, chi2o = 9999, chi2n; |
408 | Double_t *gin = 0, func0, func1, param[8], step0[8]; | |
409 | Double_t param0[2][8]={{0},{0}}, deriv[2][8]={{0},{0}}; | |
410 | Double_t shift[8], stepMax, derMax, parmin[8], parmax[8], func2[2], shift0; | |
411 | Double_t delta[8], scMax, dder[8], estim, shiftSave = 0; | |
412 | Int_t min, max, nCall = 0, nLoop, idMax = 0, iestMax = 0, nFail; | |
413 | Double_t rad, dist[3] = {0}; | |
c0a16418 | 414 | |
a9c259b2 | 415 | // Try to fit with one-track hypothesis, then 2-track. If chi2/dof is |
416 | // lower, try 3-track (if number of pads is sufficient). | |
417 | Int_t iflag = 0; // for the first call of fcn1 | |
418 | for (Int_t iseed = 0; iseed < nfit; ++iseed) | |
419 | { | |
c0a16418 | 420 | |
a9c259b2 | 421 | Int_t memory[8] = {0}; |
422 | if (iseed) | |
423 | { | |
424 | for (Int_t j = 0; j < fNpar; ++j) | |
c0a16418 | 425 | { |
a9c259b2 | 426 | param[j] = parOk[j]; |
c0a16418 | 427 | } |
a9c259b2 | 428 | param[fNpar] = 0.6; |
429 | parmin[fNpar] = 0; | |
430 | parmax[fNpar++] = 1; | |
431 | } | |
c0a16418 | 432 | |
a9c259b2 | 433 | if (nfit == 1) |
434 | { | |
435 | param[fNpar] = xyCand[0][0]; // take COG | |
436 | } | |
437 | else | |
438 | { | |
439 | param[fNpar] = xyseed[maxSeed[iseed]][0]; | |
440 | //param[fNpar] = fNpar==0 ? -16.1651 : -15.2761; | |
441 | } | |
442 | parmin[fNpar] = xmin; | |
443 | parmax[fNpar++] = xmax; | |
444 | if (nfit == 1) | |
445 | { | |
446 | param[fNpar] = xyCand[0][1]; // take COG | |
447 | } | |
448 | else | |
449 | { | |
450 | param[fNpar] = xyseed[maxSeed[iseed]][1]; | |
451 | //param[fNpar] = fNpar==1 ? -15.1737 : -15.8487; | |
452 | } | |
453 | parmin[fNpar] = ymin; | |
454 | parmax[fNpar++] = ymax; | |
455 | ||
456 | for (Int_t j = 0; j < fNpar; ++j) | |
457 | { | |
458 | step0[j] = shift[j] = step[j%3]; | |
459 | } | |
460 | ||
461 | if (iseed) | |
462 | { | |
463 | for (Int_t j = 0; j < fNpar; ++j) | |
c0a16418 | 464 | { |
a9c259b2 | 465 | param0[1][j] = 0; |
2abdae6e | 466 | } |
a9c259b2 | 467 | } |
468 | if (fDebug) { | |
469 | for (Int_t j = 0; j < fNpar; ++j) cout << param[j] << " "; | |
470 | cout << endl; | |
471 | } | |
c0a16418 | 472 | |
a9c259b2 | 473 | // Try new algorithm |
474 | min = nLoop = 1; stepMax = func2[1] = derMax = 999999; nFail = 0; | |
475 | ||
476 | while (1) | |
477 | { | |
478 | max = !min; | |
479 | Fcn1(cluster,fNpar, gin, func0, param, iflag); nCall++; | |
480 | iflag = 1; | |
481 | //cout << " Func: " << func0 << endl; | |
c0a16418 | 482 | |
a9c259b2 | 483 | func2[max] = func0; |
484 | for (Int_t j = 0; j < fNpar; ++j) | |
c0a16418 | 485 | { |
a9c259b2 | 486 | param0[max][j] = param[j]; |
487 | delta[j] = step0[j]; | |
488 | param[j] += delta[j] / 10; | |
489 | if (j > 0) param[j-1] -= delta[j-1] / 10; | |
490 | Fcn1(cluster,fNpar, gin, func1, param, iflag); nCall++; | |
491 | deriv[max][j] = (func1 - func0) / delta[j] * 10; // first derivative | |
492 | //cout << j << " " << deriv[max][j] << endl; | |
493 | dder[j] = param0[0][j] != param0[1][j] ? (deriv[0][j] - deriv[1][j]) / | |
494 | (param0[0][j] - param0[1][j]) : 0; // second derivative | |
495 | } | |
496 | param[fNpar-1] -= delta[fNpar-1] / 10; | |
497 | if (nCall > 2000) break; | |
c0a16418 | 498 | |
a9c259b2 | 499 | min = func2[0] < func2[1] ? 0 : 1; |
500 | nFail = min == max ? 0 : nFail + 1; | |
c0a16418 | 501 | |
a9c259b2 | 502 | stepMax = derMax = estim = 0; |
503 | for (Int_t j = 0; j < fNpar; ++j) | |
504 | { | |
505 | // Estimated distance to minimum | |
506 | shift0 = shift[j]; | |
507 | if (nLoop == 1) | |
508 | { | |
509 | shift[j] = TMath::Sign (step0[j], -deriv[max][j]); // first step | |
510 | } | |
511 | else if (TMath::Abs(deriv[0][j]) < 1.e-3 && TMath::Abs(deriv[1][j]) < 1.e-3) | |
512 | { | |
513 | shift[j] = 0; | |
514 | } | |
94bf739c | 515 | else if (((deriv[min][j]*deriv[!min][j] > 0) && (TMath::Abs(deriv[min][j]) > TMath::Abs(deriv[!min][j]))) |
516 | || (TMath::Abs(deriv[0][j]-deriv[1][j]) < 1.e-3) || (TMath::Abs(dder[j]) < 1.e-6)) | |
a9c259b2 | 517 | { |
518 | shift[j] = -TMath::Sign (shift[j], (func2[0]-func2[1]) * (param0[0][j]-param0[1][j])); | |
519 | if (min == max) | |
520 | { | |
521 | if (memory[j] > 1) | |
9bbd7f60 | 522 | { |
a9c259b2 | 523 | shift[j] *= 2; |
524 | } | |
525 | memory[j]++; | |
9bbd7f60 | 526 | } |
a9c259b2 | 527 | } |
528 | else | |
529 | { | |
530 | shift[j] = dder[j] != 0 ? -deriv[min][j] / dder[j] : 0; | |
531 | memory[j] = 0; | |
532 | } | |
c0a16418 | 533 | |
a9c259b2 | 534 | Double_t es = TMath::Abs(shift[j]) / step0[j]; |
535 | if (es > estim) | |
536 | { | |
537 | estim = es; | |
538 | iestMax = j; | |
539 | } | |
c0a16418 | 540 | |
a9c259b2 | 541 | // Too big step |
542 | if (TMath::Abs(shift[j])/step0[j] > 10) shift[j] = TMath::Sign(10.,shift[j]) * step0[j]; // | |
543 | ||
544 | // Failed to improve minimum | |
545 | if (min != max) | |
546 | { | |
547 | memory[j] = 0; | |
548 | param[j] = param0[min][j]; | |
549 | if (TMath::Abs(shift[j]+shift0) > 0.1*step0[j]) | |
c0a16418 | 550 | { |
a9c259b2 | 551 | shift[j] = (shift[j] + shift0) / 2; |
552 | } | |
553 | else | |
c0a16418 | 554 | { |
a9c259b2 | 555 | shift[j] /= -2; |
556 | } | |
557 | } | |
c0a16418 | 558 | |
a9c259b2 | 559 | // Too big step |
560 | if (TMath::Abs(shift[j]*deriv[min][j]) > func2[min]) | |
561 | { | |
562 | shift[j] = TMath::Sign (func2[min]/deriv[min][j], shift[j]); | |
563 | } | |
564 | ||
565 | // Introduce step relaxation factor | |
566 | if (memory[j] < 3) | |
567 | { | |
568 | scMax = 1 + 4 / TMath::Max(nLoop/2.,1.); | |
569 | if (TMath::Abs(shift0) > 0 && TMath::Abs(shift[j]/shift0) > scMax) | |
c0a16418 | 570 | { |
a9c259b2 | 571 | shift[j] = TMath::Sign (shift0*scMax, shift[j]); |
572 | } | |
573 | } | |
574 | param[j] += shift[j]; | |
575 | // Check parameter limits | |
576 | if (param[j] < parmin[j]) | |
577 | { | |
578 | shift[j] = parmin[j] - param[j]; | |
579 | param[j] = parmin[j]; | |
580 | } | |
581 | else if (param[j] > parmax[j]) | |
582 | { | |
583 | shift[j] = parmax[j] - param[j]; | |
584 | param[j] = parmax[j]; | |
585 | } | |
586 | //cout << " xxx " << j << " " << shift[j] << " " << param[j] << endl; | |
587 | stepMax = TMath::Max (stepMax, TMath::Abs(shift[j]/step0[j])); | |
588 | if (TMath::Abs(deriv[min][j]) > derMax) | |
589 | { | |
590 | idMax = j; | |
591 | derMax = TMath::Abs (deriv[min][j]); | |
592 | } | |
593 | } // for (Int_t j=0; j<fNpar; | |
c0a16418 | 594 | |
94bf739c | 595 | if (((estim < 1) && (derMax < 2)) || nLoop > 150) break; // minimum was found |
c0a16418 | 596 | |
a9c259b2 | 597 | nLoop++; |
c0a16418 | 598 | |
a9c259b2 | 599 | // Check for small step |
600 | if (shift[idMax] == 0) | |
601 | { | |
602 | shift[idMax] = step0[idMax]/10; | |
603 | param[idMax] += shift[idMax]; | |
604 | continue; | |
605 | } | |
c0a16418 | 606 | |
a9c259b2 | 607 | if (!memory[idMax] && derMax > 0.5 && nLoop > 10) |
608 | { | |
609 | if (dder[idMax] != 0 && TMath::Abs(deriv[min][idMax]/dder[idMax]/shift[idMax]) > 10) | |
c0a16418 | 610 | { |
a9c259b2 | 611 | if (min == max) dder[idMax] = -dder[idMax]; |
612 | shift[idMax] = -deriv[min][idMax] / dder[idMax] / 10; | |
613 | param[idMax] += shift[idMax]; | |
614 | stepMax = TMath::Max (stepMax, TMath::Abs(shift[idMax])/step0[idMax]); | |
615 | if (min == max) shiftSave = shift[idMax]; | |
616 | } | |
617 | if (nFail > 10) | |
618 | { | |
619 | param[idMax] -= shift[idMax]; | |
620 | shift[idMax] = 4 * shiftSave * (gRandom->Rndm(0) - 0.5); | |
621 | param[idMax] += shift[idMax]; | |
622 | } | |
623 | } | |
624 | } // while (1) | |
c0a16418 | 625 | |
a9c259b2 | 626 | fmin = func2[min]; |
627 | ||
628 | nDof = npads - fNpar + nVirtual; | |
629 | if (!nDof) nDof++; | |
630 | chi2n = fmin / nDof; | |
631 | if (fDebug) cout << " Chi2 " << chi2n << " " << fNpar << endl; | |
c0a16418 | 632 | |
a9c259b2 | 633 | //if (fNpar > 2) cout << param0[min][fNpar-3] << " " << chi2n * (1+TMath::Min(1-param0[min][fNpar-3],0.25)) << endl; |
634 | //if (chi2n*1.2+1.e-6 > chi2o ) | |
94bf739c | 635 | if (fNpar > 2 && (chi2n > chi2o || ((iseed == nfit-1) |
636 | && (chi2n * (1+TMath::Min(1-param0[min][fNpar-3],0.25)) > chi2o)))) | |
a9c259b2 | 637 | { fNpar -= 3; break; } |
c0a16418 | 638 | |
a9c259b2 | 639 | // Save parameters and errors |
c0a16418 | 640 | |
a9c259b2 | 641 | if (nInX == 1) { |
642 | // One pad per direction | |
643 | //for (Int_t i=0; i<fNpar; ++i) if (i == 0 || i == 2 || i == 5) param0[min][i] = xPad; | |
644 | for (Int_t i=0; i<fNpar; ++i) if (i == 0 || i == 2 || i == 5) | |
645 | param0[min][i] = xyCand[0][0]; | |
646 | } | |
647 | if (nInY == 1) { | |
648 | // One pad per direction | |
649 | //for (Int_t i=0; i<fNpar; ++i) if (i == 1 || i == 3 || i == 6) param0[min][i] = yPad; | |
650 | for (Int_t i=0; i<fNpar; ++i) if (i == 1 || i == 3 || i == 6) | |
651 | param0[min][i] = xyCand[0][1]; | |
652 | } | |
c0a16418 | 653 | |
a9c259b2 | 654 | /* |
655 | if (iseed > 0) { | |
656 | // Find distance to the nearest neighbour | |
657 | dist[0] = dist[1] = TMath::Sqrt ((param0[min][0]-param0[min][2])* | |
658 | (param0[min][0]-param0[min][2]) | |
659 | +(param0[min][1]-param0[min][3])* | |
660 | (param0[min][1]-param0[min][3])); | |
661 | if (iseed > 1) { | |
662 | dist[2] = TMath::Sqrt ((param0[min][0]-param0[min][5])* | |
663 | (param0[min][0]-param0[min][5]) | |
664 | +(param0[min][1]-param0[min][6])* | |
665 | (param0[min][1]-param0[min][6])); | |
666 | rad = TMath::Sqrt ((param0[min][2]-param0[min][5])* | |
667 | (param0[min][2]-param0[min][5]) | |
668 | +(param0[min][3]-param0[min][6])* | |
669 | (param0[min][3]-param0[min][6])); | |
670 | if (dist[2] < dist[0]) dist[0] = dist[2]; | |
671 | if (rad < dist[1]) dist[1] = rad; | |
672 | if (rad < dist[2]) dist[2] = rad; | |
c0a16418 | 673 | } |
a9c259b2 | 674 | cout << dist[0] << " " << dist[1] << " " << dist[2] << endl; |
675 | if (dist[TMath::LocMin(iseed+1,dist)] < 1.) { fNpar -= 3; break; } | |
c0a16418 | 676 | } |
a9c259b2 | 677 | */ |
c0a16418 | 678 | |
a9c259b2 | 679 | for (Int_t i = 0; i < fNpar; ++i) { |
680 | parOk[i] = param0[min][i]; | |
681 | //errOk[i] = fmin; | |
682 | errOk[i] = chi2n; | |
683 | // Bounded params | |
684 | parOk[i] = TMath::Max (parOk[i], parmin[i]); | |
685 | parOk[i] = TMath::Min (parOk[i], parmax[i]); | |
686 | } | |
c0a16418 | 687 | |
a9c259b2 | 688 | chi2o = chi2n; |
689 | if (fmin < 0.1) break; // !!!??? | |
690 | } // for (Int_t iseed=0; | |
9bbd7f60 | 691 | |
a9c259b2 | 692 | if (fDebug) { |
693 | for (Int_t i=0; i<fNpar; ++i) { | |
694 | if (i == 4 || i == 7) { | |
94bf739c | 695 | if ((i == 7) || ((i == 4) && (fNpar < 7))) cout << parOk[i] << endl; |
a9c259b2 | 696 | else cout << parOk[i] * (1-parOk[7]) << endl; |
697 | continue; | |
9bbd7f60 | 698 | } |
a9c259b2 | 699 | cout << parOk[i] << " " << errOk[i] << endl; |
9bbd7f60 | 700 | } |
a9c259b2 | 701 | } |
702 | nfit = (fNpar + 1) / 3; | |
703 | dist[0] = dist[1] = dist[2] = 0; | |
704 | ||
705 | if (nfit > 1) { | |
706 | // Find distance to the nearest neighbour | |
707 | dist[0] = dist[1] = TMath::Sqrt ((parOk[0]-parOk[2])* | |
708 | (parOk[0]-parOk[2]) | |
709 | +(parOk[1]-parOk[3])* | |
710 | (parOk[1]-parOk[3])); | |
711 | if (nfit > 2) { | |
712 | dist[2] = TMath::Sqrt ((parOk[0]-parOk[5])* | |
713 | (parOk[0]-parOk[5]) | |
714 | +(parOk[1]-parOk[6])* | |
715 | (parOk[1]-parOk[6])); | |
716 | rad = TMath::Sqrt ((parOk[2]-parOk[5])* | |
717 | (parOk[2]-parOk[5]) | |
718 | +(parOk[3]-parOk[6])* | |
719 | (parOk[3]-parOk[6])); | |
720 | if (dist[2] < dist[0]) dist[0] = dist[2]; | |
721 | if (rad < dist[1]) dist[1] = rad; | |
722 | if (rad < dist[2]) dist[2] = rad; | |
c0a16418 | 723 | } |
a9c259b2 | 724 | } |
c0a16418 | 725 | |
a9c259b2 | 726 | Int_t indx; |
727 | ||
728 | Double_t coef = 0; | |
729 | if (iSimple) fnCoupled = 0; | |
730 | for (Int_t j = 0; j < nfit; ++j) { | |
731 | indx = 3 * j; | |
732 | coef = Param2Coef(j, coef, parOk); | |
733 | ||
734 | //void AliMUONClusterFinderMLEM::AddRawCluster(Double_t x, Double_t y, | |
735 | // Double_t qTot, Double_t fmin, | |
736 | // Int_t nfit, Int_t *tracks, | |
737 | // Double_t /*sigx*/, | |
738 | // Double_t /*sigy*/, | |
739 | // Double_t /*dist*/) | |
c0a16418 | 740 | |
a9c259b2 | 741 | if ( coef*fQtot >= 14 ) |
742 | { | |
743 | //AZ AliMUONCluster* cluster1 = new AliMUONCluster(); | |
744 | AliMUONCluster* cluster1 = new AliMUONCluster(cluster); | |
c0a16418 | 745 | |
a9c259b2 | 746 | cluster1->SetCharge(coef*fQtot,coef*fQtot); |
747 | cluster1->SetPosition(TVector2(parOk[indx],parOk[indx+1]),TVector2(sigCand[0][0],sigCand[0][1])); | |
748 | cluster1->SetChi2(dist[TMath::LocMin(nfit,dist)]); | |
c0a16418 | 749 | |
a9c259b2 | 750 | // FIXME: we miss some information in this cluster, as compared to |
751 | // the original AddRawCluster code. | |
752 | ||
753 | AliDebug(2,Form("Adding RawCluster detElemId %4d mult %2d charge %5d (xl,yl)=(%9.6g,%9.6g)", | |
754 | fDetElemId,cluster1->Multiplicity(),(Int_t)cluster1->Charge(), | |
755 | cluster1->Position().X(),cluster1->Position().Y())); | |
c0a16418 | 756 | |
a9c259b2 | 757 | clusterList.Add(cluster1); |
c0a16418 | 758 | } |
a9c259b2 | 759 | // AddRawCluster (parOk[indx], // double x |
760 | // parOk[indx+1], // double y | |
761 | // coef*qTot, // double charge | |
762 | // errOk[indx], // double fmin | |
763 | // nfit0+10*nfit+100*nMax+10000*fnCoupled, // int nfit | |
764 | // tracks, // int* tracks | |
765 | // sigCand[0][0], // double sigx | |
766 | // sigCand[0][1], // double sigy | |
767 | // dist[TMath::LocMin(nfit,dist)] // double dist | |
768 | // ); | |
769 | } | |
770 | return nfit; | |
771 | } | |
c0a16418 | 772 | |
773 | ||
774 | //_____________________________________________________________________________ | |
775 | void | |
776 | AliMUONClusterSplitterMLEM::Split(const AliMUONCluster& cluster, | |
a9c259b2 | 777 | TH2 *mlem, Double_t *coef, |
c0a16418 | 778 | TObjArray& clusterList) |
779 | { | |
780 | /// The main steering function to work with clusters of pixels in anode | |
781 | /// plane (find clusters, decouple them from each other, merge them (if | |
782 | /// necessary), pick up coupled pads, call the fitting function) | |
783 | ||
784 | Int_t nx = mlem->GetNbinsX(); | |
785 | Int_t ny = mlem->GetNbinsY(); | |
786 | Int_t nPix = fPixArray->GetEntriesFast(); | |
787 | ||
c0a16418 | 788 | Double_t cont; |
a9c259b2 | 789 | Int_t nclust = 0, indx, indx1, nxy = ny * nx; |
790 | Bool_t *used = new Bool_t[nxy]; | |
c0a16418 | 791 | |
a9c259b2 | 792 | for (Int_t j = 0; j < nxy; ++j) used[j] = kFALSE; |
c0a16418 | 793 | |
794 | TObjArray *clusters[200]={0}; | |
795 | TObjArray *pix; | |
796 | ||
797 | // Find clusters of histogram bins (easier to work in 2-D space) | |
2abdae6e | 798 | for (Int_t i = 1; i <= ny; ++i) |
c0a16418 | 799 | { |
2abdae6e | 800 | for (Int_t j = 1; j <= nx; ++j) |
c0a16418 | 801 | { |
802 | indx = (i-1)*nx + j - 1; | |
803 | if (used[indx]) continue; | |
804 | cont = mlem->GetCellContent(j,i); | |
805 | if (cont < 0.5) continue; | |
806 | pix = new TObjArray(20); | |
807 | used[indx] = 1; | |
808 | pix->Add(BinToPix(mlem,j,i)); | |
809 | AddBin(mlem, i, j, 0, used, pix); // recursive call | |
810 | if (nclust >= 200) AliFatal(" Too many clusters !!!"); | |
811 | clusters[nclust++] = pix; | |
812 | } // for (Int_t j=1; j<=nx; j++) { | |
a9c259b2 | 813 | } // for (Int_t i=1; i<=ny; |
814 | if (fDebug) cout << nclust << endl; | |
2abdae6e | 815 | delete [] used; |
c0a16418 | 816 | |
817 | // Compute couplings between clusters and clusters to pads | |
818 | Int_t npad = cluster.Multiplicity(); | |
819 | ||
820 | // Exclude pads with overflows | |
a9c259b2 | 821 | /* |
2abdae6e | 822 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 823 | { |
824 | AliMUONPad* pad = cluster.Pad(j); | |
825 | if ( pad->IsSaturated() ) | |
826 | { | |
827 | pad->SetStatus(-5); | |
828 | } | |
829 | else | |
830 | { | |
831 | pad->SetStatus(0); | |
832 | } | |
833 | } | |
a9c259b2 | 834 | */ |
c0a16418 | 835 | |
a9c259b2 | 836 | // Compute couplings of clusters to pads (including overflows) |
c0a16418 | 837 | TMatrixD aijclupad(nclust,npad); |
838 | aijclupad = 0; | |
839 | Int_t npxclu; | |
2abdae6e | 840 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 841 | { |
842 | pix = clusters[iclust]; | |
843 | npxclu = pix->GetEntriesFast(); | |
2abdae6e | 844 | for (Int_t i = 0; i < npxclu; ++i) |
c0a16418 | 845 | { |
846 | indx = fPixArray->IndexOf(pix->UncheckedAt(i)); | |
2abdae6e | 847 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 848 | { |
a9c259b2 | 849 | //AliMUONPad* pad = cluster.Pad(j); |
850 | //if ( pad->Status() < 0 && pad->Status() != -5) continue; | |
c0a16418 | 851 | if (coef[j*nPix+indx] < fgkCouplMin) continue; |
852 | aijclupad(iclust,j) += coef[j*nPix+indx]; | |
853 | } | |
854 | } | |
855 | } | |
856 | ||
a9c259b2 | 857 | // Compute couplings between clusters (exclude overflows) |
c0a16418 | 858 | TMatrixD aijcluclu(nclust,nclust); |
859 | aijcluclu = 0; | |
2abdae6e | 860 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 861 | { |
2abdae6e | 862 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 863 | { |
864 | // Exclude overflows | |
a9c259b2 | 865 | //if ( cluster.Pad(j)->Status() < 0) continue; |
866 | if ( cluster.Pad(j)->IsSaturated()) continue; | |
c0a16418 | 867 | if (aijclupad(iclust,j) < fgkCouplMin) continue; |
868 | for (Int_t iclust1=iclust+1; iclust1<nclust; iclust1++) | |
869 | { | |
870 | if (aijclupad(iclust1,j) < fgkCouplMin) continue; | |
871 | aijcluclu(iclust,iclust1) += | |
872 | TMath::Sqrt (aijclupad(iclust,j)*aijclupad(iclust1,j)); | |
873 | } | |
874 | } | |
875 | } | |
2abdae6e | 876 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 877 | { |
2abdae6e | 878 | for (Int_t iclust1 = iclust+1; iclust1 < nclust; ++iclust1) |
c0a16418 | 879 | { |
880 | aijcluclu(iclust1,iclust) = aijcluclu(iclust,iclust1); | |
881 | } | |
882 | } | |
883 | ||
2abdae6e | 884 | if (fDebug && nclust > 1) aijcluclu.Print(); |
885 | ||
c0a16418 | 886 | // Find groups of coupled clusters |
887 | used = new Bool_t[nclust]; | |
a9c259b2 | 888 | for (Int_t j = 0; j < nclust; ++j) used[j] = kFALSE; |
2abdae6e | 889 | |
c0a16418 | 890 | Int_t *clustNumb = new Int_t[nclust]; |
891 | Int_t nCoupled, nForFit, minGroup[3], clustFit[3], nfit = 0; | |
2abdae6e | 892 | //Double_t parOk[8]; |
893 | Double_t parOk[8] = {0}; //AZ | |
c0a16418 | 894 | |
2abdae6e | 895 | for (Int_t igroup = 0; igroup < nclust; ++igroup) |
c0a16418 | 896 | { |
897 | if (used[igroup]) continue; | |
898 | used[igroup] = kTRUE; | |
899 | clustNumb[0] = igroup; | |
900 | nCoupled = 1; | |
901 | // Find group of coupled clusters | |
902 | AddCluster(igroup, nclust, aijcluclu, used, clustNumb, nCoupled); // recursive | |
903 | ||
2abdae6e | 904 | if (fDebug) { |
905 | cout << " nCoupled: " << nCoupled << endl; | |
906 | for (Int_t i=0; i<nCoupled; ++i) cout << clustNumb[i] << " "; cout << endl; | |
907 | } | |
c0a16418 | 908 | |
909 | fnCoupled = nCoupled; | |
910 | ||
911 | while (nCoupled > 0) | |
912 | { | |
913 | if (nCoupled < 4) | |
914 | { | |
915 | nForFit = nCoupled; | |
2abdae6e | 916 | for (Int_t i = 0; i < nCoupled; ++i) clustFit[i] = clustNumb[i]; |
c0a16418 | 917 | } |
918 | else | |
919 | { | |
920 | // Too many coupled clusters to fit - try to decouple them | |
921 | // Find the lowest coupling of 1, 2, min(3,nLinks/2) pixels with | |
922 | // all the others in the group | |
2abdae6e | 923 | for (Int_t j = 0; j < 3; ++j) minGroup[j] = -1; |
924 | Double_t coupl = MinGroupCoupl(nCoupled, clustNumb, aijcluclu, minGroup); | |
c0a16418 | 925 | |
926 | // Flag clusters for fit | |
927 | nForFit = 0; | |
928 | while (minGroup[nForFit] >= 0 && nForFit < 3) | |
929 | { | |
2abdae6e | 930 | if (fDebug) cout << clustNumb[minGroup[nForFit]] << " "; |
c0a16418 | 931 | clustFit[nForFit] = clustNumb[minGroup[nForFit]]; |
932 | clustNumb[minGroup[nForFit]] -= 999; | |
933 | nForFit++; | |
934 | } | |
2abdae6e | 935 | if (fDebug) cout << " nForFit " << nForFit << " " << coupl << endl; |
c0a16418 | 936 | } // else |
937 | ||
938 | // Select pads for fit. | |
939 | if (SelectPad(cluster,nCoupled, nForFit, clustNumb, clustFit, aijclupad) < 3 && nCoupled > 1) | |
940 | { | |
941 | // Deselect pads | |
2abdae6e | 942 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 943 | { |
944 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 945 | //if ( pad->Status()==1 ) pad->SetStatus(0); |
946 | //if ( pad->Status()==-9) pad->SetStatus(-5); | |
05542040 | 947 | if ( pad->Status() == AliMUONClusterFinderMLEM::GetUseForFitFlag() || |
948 | pad->Status() == AliMUONClusterFinderMLEM::GetCoupledFlag()) | |
949 | pad->SetStatus(AliMUONClusterFinderMLEM::GetZeroFlag()); | |
c0a16418 | 950 | } |
951 | // Merge the failed cluster candidates (with too few pads to fit) with | |
952 | // the one with the strongest coupling | |
953 | Merge(cluster,nForFit, nCoupled, clustNumb, clustFit, clusters, aijcluclu, aijclupad); | |
954 | } | |
955 | else | |
956 | { | |
957 | // Do the fit | |
b161da28 | 958 | nfit = Fit(cluster,0, nForFit, clustFit, clusters, parOk, clusterList, mlem); |
2abdae6e | 959 | if (nfit == 0) { |
a9c259b2 | 960 | //cout << " (nfit == 0) " << fNpar << " " << cluster.Multiplicity() << endl; |
961 | fNpar = 0; // should be 0 by itself but just in case ... | |
2abdae6e | 962 | } |
c0a16418 | 963 | } |
964 | ||
965 | // Subtract the fitted charges from pads with strong coupling and/or | |
966 | // return pads for further use | |
967 | UpdatePads(cluster,nfit, parOk); | |
968 | ||
969 | // Mark used pads | |
2abdae6e | 970 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 971 | { |
972 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 973 | //if ( pad->Status()==1 ) pad->SetStatus(-2); |
974 | //if ( pad->Status()==-9) pad->SetStatus(-5); | |
05542040 | 975 | if ( pad->Status() == AliMUONClusterFinderMLEM::GetUseForFitFlag() ) |
976 | pad->SetStatus(AliMUONClusterFinderMLEM::GetModifiedFlag()); | |
c0a16418 | 977 | } |
978 | ||
979 | // Sort the clusters (move to the right the used ones) | |
980 | Int_t beg = 0, end = nCoupled - 1; | |
981 | while (beg < end) | |
982 | { | |
983 | if (clustNumb[beg] >= 0) { ++beg; continue; } | |
2abdae6e | 984 | for (Int_t j = end; j > beg; --j) |
c0a16418 | 985 | { |
986 | if (clustNumb[j] < 0) continue; | |
987 | end = j - 1; | |
988 | indx = clustNumb[beg]; | |
989 | clustNumb[beg] = clustNumb[j]; | |
990 | clustNumb[j] = indx; | |
991 | break; | |
992 | } | |
993 | ++beg; | |
994 | } | |
995 | ||
996 | nCoupled -= nForFit; | |
997 | if (nCoupled > 3) | |
998 | { | |
999 | // Remove couplings of used clusters | |
2abdae6e | 1000 | for (Int_t iclust = nCoupled; iclust < nCoupled+nForFit; ++iclust) |
c0a16418 | 1001 | { |
1002 | indx = clustNumb[iclust] + 999; | |
2abdae6e | 1003 | for (Int_t iclust1 = 0; iclust1 < nCoupled; ++iclust1) |
c0a16418 | 1004 | { |
1005 | indx1 = clustNumb[iclust1]; | |
1006 | aijcluclu(indx,indx1) = aijcluclu(indx1,indx) = 0; | |
1007 | } | |
1008 | } | |
1009 | ||
a9c259b2 | 1010 | // Update the remaining clusters couplings (subtract couplings from |
1011 | // the used pads) - overflows excluded | |
2abdae6e | 1012 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 1013 | { |
1014 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1015 | //if ( pad->Status() != -2) continue; |
05542040 | 1016 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetModifiedFlag()) continue; |
c0a16418 | 1017 | for (Int_t iclust=0; iclust<nCoupled; ++iclust) |
1018 | { | |
1019 | indx = clustNumb[iclust]; | |
1020 | if (aijclupad(indx,j) < fgkCouplMin) continue; | |
2abdae6e | 1021 | for (Int_t iclust1 = iclust+1; iclust1 < nCoupled; ++iclust1) |
c0a16418 | 1022 | { |
1023 | indx1 = clustNumb[iclust1]; | |
1024 | if (aijclupad(indx1,j) < fgkCouplMin) continue; | |
1025 | // Check this | |
1026 | aijcluclu(indx,indx1) -= | |
1027 | TMath::Sqrt (aijclupad(indx,j)*aijclupad(indx1,j)); | |
1028 | aijcluclu(indx1,indx) = aijcluclu(indx,indx1); | |
1029 | } | |
1030 | } | |
a9c259b2 | 1031 | //pad->SetStatus(-8); |
05542040 | 1032 | pad->SetStatus(AliMUONClusterFinderMLEM::GetOverFlag()); |
c0a16418 | 1033 | } // for (Int_t j=0; j<npad; |
1034 | } // if (nCoupled > 3) | |
1035 | } // while (nCoupled > 0) | |
1036 | } // for (Int_t igroup=0; igroup<nclust; | |
1037 | ||
2abdae6e | 1038 | for (Int_t iclust = 0; iclust < nclust; ++iclust) |
c0a16418 | 1039 | { |
1040 | pix = clusters[iclust]; | |
1041 | pix->Clear(); | |
1042 | delete pix; | |
c0a16418 | 1043 | } |
1044 | delete [] clustNumb; | |
c0a16418 | 1045 | delete [] used; |
c0a16418 | 1046 | |
1047 | } | |
1048 | ||
1049 | //_____________________________________________________________________________ | |
1050 | void | |
1051 | AliMUONClusterSplitterMLEM::Merge(const AliMUONCluster& cluster, | |
1052 | Int_t nForFit, Int_t nCoupled, | |
1053 | Int_t *clustNumb, Int_t *clustFit, | |
1054 | TObjArray **clusters, | |
1055 | TMatrixD& aijcluclu, TMatrixD& aijclupad) | |
1056 | { | |
1057 | /// Merge the group of clusters with the one having the strongest coupling with them | |
1058 | ||
1059 | Int_t indx, indx1, npxclu, npxclu1, imax=0; | |
1060 | TObjArray *pix, *pix1; | |
1061 | Double_t couplMax; | |
1062 | ||
2abdae6e | 1063 | for (Int_t icl = 0; icl < nForFit; ++icl) |
c0a16418 | 1064 | { |
1065 | indx = clustFit[icl]; | |
1066 | pix = clusters[indx]; | |
1067 | npxclu = pix->GetEntriesFast(); | |
1068 | couplMax = -1; | |
2abdae6e | 1069 | for (Int_t icl1 = 0; icl1 < nCoupled; ++icl1) |
c0a16418 | 1070 | { |
1071 | indx1 = clustNumb[icl1]; | |
1072 | if (indx1 < 0) continue; | |
1073 | if ( aijcluclu(indx,indx1) > couplMax) | |
1074 | { | |
1075 | couplMax = aijcluclu(indx,indx1); | |
1076 | imax = indx1; | |
1077 | } | |
1078 | } // for (Int_t icl1=0; | |
1079 | // Add to it | |
1080 | pix1 = clusters[imax]; | |
1081 | npxclu1 = pix1->GetEntriesFast(); | |
1082 | // Add pixels | |
2abdae6e | 1083 | for (Int_t i = 0; i < npxclu; ++i) |
c0a16418 | 1084 | { |
1085 | pix1->Add(pix->UncheckedAt(i)); | |
1086 | pix->RemoveAt(i); | |
1087 | } | |
1088 | ||
1089 | //Add cluster-to-cluster couplings | |
2abdae6e | 1090 | for (Int_t icl1 = 0; icl1 < nCoupled; ++icl1) |
c0a16418 | 1091 | { |
1092 | indx1 = clustNumb[icl1]; | |
1093 | if (indx1 < 0 || indx1 == imax) continue; | |
1094 | aijcluclu(indx1,imax) += aijcluclu(indx,indx1); | |
1095 | aijcluclu(imax,indx1) = aijcluclu(indx1,imax); | |
1096 | } | |
1097 | aijcluclu(indx,imax) = aijcluclu(imax,indx) = 0; | |
1098 | ||
1099 | //Add cluster-to-pad couplings | |
2abdae6e | 1100 | Int_t mult = cluster.Multiplicity(); |
1101 | for (Int_t j = 0; j < mult; ++j) | |
c0a16418 | 1102 | { |
1103 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1104 | //if ( pad->Status() < 0 && pad->Status() != -5 ) continue;// exclude used pads |
05542040 | 1105 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetZeroFlag()) continue;// exclude used pads |
c0a16418 | 1106 | aijclupad(imax,j) += aijclupad(indx,j); |
1107 | aijclupad(indx,j) = 0; | |
1108 | } | |
1109 | } // for (Int_t icl=0; icl<nForFit; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | //_____________________________________________________________________________ | |
1114 | Double_t | |
1115 | AliMUONClusterSplitterMLEM::MinGroupCoupl(Int_t nCoupled, Int_t *clustNumb, | |
1116 | TMatrixD& aijcluclu, Int_t *minGroup) | |
1117 | { | |
1118 | /// Find group of clusters with minimum coupling to all the others | |
1119 | ||
1120 | Int_t i123max = TMath::Min(3,nCoupled/2); | |
1121 | Int_t indx, indx1, indx2, indx3, nTot = 0; | |
1122 | Double_t *coupl1 = 0, *coupl2 = 0, *coupl3 = 0; | |
1123 | ||
2abdae6e | 1124 | for (Int_t i123 = 1; i123 <= i123max; ++i123) { |
c0a16418 | 1125 | |
1126 | if (i123 == 1) { | |
1127 | coupl1 = new Double_t [nCoupled]; | |
2abdae6e | 1128 | for (Int_t i = 0; i < nCoupled; ++i) coupl1[i] = 0; |
c0a16418 | 1129 | } |
1130 | else if (i123 == 2) { | |
1131 | nTot = nCoupled*nCoupled; | |
1132 | coupl2 = new Double_t [nTot]; | |
2abdae6e | 1133 | for (Int_t i = 0; i < nTot; ++i) coupl2[i] = 9999; |
c0a16418 | 1134 | } else { |
1135 | nTot = nTot*nCoupled; | |
1136 | coupl3 = new Double_t [nTot]; | |
2abdae6e | 1137 | for (Int_t i = 0; i < nTot; ++i) coupl3[i] = 9999; |
c0a16418 | 1138 | } // else |
1139 | ||
2abdae6e | 1140 | for (Int_t i = 0; i < nCoupled; ++i) { |
c0a16418 | 1141 | indx1 = clustNumb[i]; |
2abdae6e | 1142 | for (Int_t j = i+1; j < nCoupled; ++j) { |
c0a16418 | 1143 | indx2 = clustNumb[j]; |
1144 | if (i123 == 1) { | |
1145 | coupl1[i] += aijcluclu(indx1,indx2); | |
1146 | coupl1[j] += aijcluclu(indx1,indx2); | |
1147 | } | |
1148 | else if (i123 == 2) { | |
1149 | indx = i*nCoupled + j; | |
1150 | coupl2[indx] = coupl1[i] + coupl1[j]; | |
1151 | coupl2[indx] -= 2 * (aijcluclu(indx1,indx2)); | |
1152 | } else { | |
2abdae6e | 1153 | for (Int_t k = j+1; k < nCoupled; ++k) { |
c0a16418 | 1154 | indx3 = clustNumb[k]; |
1155 | indx = i*nCoupled*nCoupled + j*nCoupled + k; | |
1156 | coupl3[indx] = coupl2[i*nCoupled+j] + coupl1[k]; | |
1157 | coupl3[indx] -= 2 * (aijcluclu(indx1,indx3)+aijcluclu(indx2,indx3)); | |
1158 | } | |
1159 | } // else | |
1160 | } // for (Int_t j=i+1; | |
1161 | } // for (Int_t i=0; | |
1162 | } // for (Int_t i123=1; | |
1163 | ||
1164 | // Find minimum coupling | |
1165 | Double_t couplMin = 9999; | |
1166 | Int_t locMin = 0; | |
1167 | ||
2abdae6e | 1168 | for (Int_t i123 = 1; i123 <= i123max; ++i123) { |
c0a16418 | 1169 | if (i123 == 1) { |
1170 | locMin = TMath::LocMin(nCoupled, coupl1); | |
1171 | couplMin = coupl1[locMin]; | |
1172 | minGroup[0] = locMin; | |
2abdae6e | 1173 | delete [] coupl1; |
c0a16418 | 1174 | } |
1175 | else if (i123 == 2) { | |
1176 | locMin = TMath::LocMin(nCoupled*nCoupled, coupl2); | |
1177 | if (coupl2[locMin] < couplMin) { | |
1178 | couplMin = coupl2[locMin]; | |
1179 | minGroup[0] = locMin/nCoupled; | |
1180 | minGroup[1] = locMin%nCoupled; | |
1181 | } | |
2abdae6e | 1182 | delete [] coupl2; |
c0a16418 | 1183 | } else { |
1184 | locMin = TMath::LocMin(nTot, coupl3); | |
1185 | if (coupl3[locMin] < couplMin) { | |
1186 | couplMin = coupl3[locMin]; | |
1187 | minGroup[0] = locMin/nCoupled/nCoupled; | |
1188 | minGroup[1] = locMin%(nCoupled*nCoupled)/nCoupled; | |
1189 | minGroup[2] = locMin%nCoupled; | |
1190 | } | |
2abdae6e | 1191 | delete [] coupl3; |
c0a16418 | 1192 | } // else |
1193 | } // for (Int_t i123=1; | |
1194 | return couplMin; | |
1195 | } | |
1196 | ||
1197 | //_____________________________________________________________________________ | |
1198 | Int_t | |
1199 | AliMUONClusterSplitterMLEM::SelectPad(const AliMUONCluster& cluster, | |
1200 | Int_t nCoupled, Int_t nForFit, | |
1201 | Int_t *clustNumb, Int_t *clustFit, | |
1202 | TMatrixD& aijclupad) | |
1203 | { | |
1204 | /// Select pads for fit. If too many coupled clusters, find pads giving | |
1205 | /// the strongest coupling with the rest of clusters and exclude them from the fit. | |
1206 | ||
1207 | Int_t npad = cluster.Multiplicity(); | |
1208 | Double_t *padpix = 0; | |
1209 | ||
1210 | if (nCoupled > 3) | |
1211 | { | |
1212 | padpix = new Double_t[npad]; | |
a9c259b2 | 1213 | for (Int_t i = 0; i < npad; ++i) padpix[i] = 0.; |
c0a16418 | 1214 | } |
1215 | ||
1216 | Int_t nOK = 0, indx, indx1; | |
2abdae6e | 1217 | for (Int_t iclust = 0; iclust < nForFit; ++iclust) |
c0a16418 | 1218 | { |
1219 | indx = clustFit[iclust]; | |
2abdae6e | 1220 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 1221 | { |
1222 | if ( aijclupad(indx,j) < fgkCouplMin) continue; | |
1223 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1224 | /* |
2abdae6e | 1225 | if ( pad->Status() == -5 ) pad->SetStatus(-9); // flag overflow |
c0a16418 | 1226 | if ( pad->Status() < 0 ) continue; // exclude overflows and used pads |
1227 | if ( !pad->Status() ) | |
1228 | { | |
1229 | pad->SetStatus(1); | |
1230 | ++nOK; // pad to be used in fit | |
1231 | } | |
a9c259b2 | 1232 | */ |
05542040 | 1233 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetZeroFlag() |
a9c259b2 | 1234 | || pad->IsSaturated() ) continue; // used pads and overflows |
05542040 | 1235 | pad->SetStatus(AliMUONClusterFinderMLEM::GetUseForFitFlag()); |
a9c259b2 | 1236 | ++nOK; // pad to be used in fit |
1237 | ||
c0a16418 | 1238 | if (nCoupled > 3) |
1239 | { | |
1240 | // Check other clusters | |
2abdae6e | 1241 | for (Int_t iclust1 = 0; iclust1 < nCoupled; ++iclust1) |
c0a16418 | 1242 | { |
1243 | indx1 = clustNumb[iclust1]; | |
1244 | if (indx1 < 0) continue; | |
1245 | if ( aijclupad(indx1,j) < fgkCouplMin ) continue; | |
1246 | padpix[j] += aijclupad(indx1,j); | |
1247 | } | |
1248 | } // if (nCoupled > 3) | |
1249 | } // for (Int_t j=0; j<npad; | |
1250 | } // for (Int_t iclust=0; iclust<nForFit | |
1251 | if (nCoupled < 4) return nOK; | |
1252 | ||
1253 | Double_t aaa = 0; | |
2abdae6e | 1254 | for (Int_t j = 0; j < npad; ++j) |
c0a16418 | 1255 | { |
1256 | if (padpix[j] < fgkCouplMin) continue; | |
1257 | aaa += padpix[j]; | |
a9c259b2 | 1258 | //cluster.Pad(j)->SetStatus(-1); // exclude pads with strong coupling to the other clusters |
05542040 | 1259 | cluster.Pad(j)->SetStatus(AliMUONClusterFinderMLEM::GetCoupledFlag()); // exclude pads with strong coupling to the other clusters |
c0a16418 | 1260 | nOK--; |
1261 | } | |
1262 | delete [] padpix; | |
c0a16418 | 1263 | return nOK; |
1264 | } | |
1265 | ||
1266 | //_____________________________________________________________________________ | |
1267 | void | |
1268 | AliMUONClusterSplitterMLEM::UpdatePads(const AliMUONCluster& cluster, | |
1269 | Int_t /*nfit*/, Double_t *par) | |
1270 | { | |
1271 | /// Subtract the fitted charges from pads with strong coupling | |
1272 | ||
a9c259b2 | 1273 | Int_t indx, mult = cluster.Multiplicity(), iend = fNpar/3; |
c0a16418 | 1274 | Double_t charge, coef=0; |
1275 | ||
2abdae6e | 1276 | for (Int_t j = 0; j < mult; ++j) |
c0a16418 | 1277 | { |
1278 | AliMUONPad* pad = cluster.Pad(j); | |
a9c259b2 | 1279 | //if ( pad->Status() != -1 ) continue; |
05542040 | 1280 | if ( pad->Status() != AliMUONClusterFinderMLEM::GetCoupledFlag() ) continue; |
c0a16418 | 1281 | if (fNpar != 0) |
1282 | { | |
1283 | charge = 0; | |
a9c259b2 | 1284 | for (Int_t i = 0; i <= iend; ++i) |
c0a16418 | 1285 | { |
a9c259b2 | 1286 | // sum over hits |
1287 | indx = 3 * i; | |
1288 | coef = Param2Coef(i, coef, par); | |
9bbd7f60 | 1289 | charge += ChargeIntegration(par[indx],par[indx+1],*pad) * coef; |
c0a16418 | 1290 | } |
1291 | charge *= fQtot; | |
1292 | pad->SetCharge(pad->Charge()-charge); | |
1293 | } // if (fNpar != 0) | |
1294 | ||
a9c259b2 | 1295 | //if (pad->Charge() > 6 /*fgkZeroSuppression*/) pad->SetStatus(0); |
05542040 | 1296 | if (pad->Charge() > 6 /*fgkZeroSuppression*/) pad->SetStatus(AliMUONClusterFinderMLEM::GetZeroFlag()); |
c0a16418 | 1297 | // return pad for further using // FIXME: remove usage of zerosuppression here |
05542040 | 1298 | else pad->SetStatus(AliMUONClusterFinderMLEM::GetOverFlag()); // do not use anymore |
c0a16418 | 1299 | |
1300 | } // for (Int_t j=0; | |
1301 | } | |
1302 | ||
1303 |