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30178c30 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
d19b6003 18// -------------------------------
19// Class AliMUONClusterFinderAZ
20// -------------------------------
21// Clusterizer class based on the Expectation-Maximization algorithm
22// Author: Alexander Zinchenko, JINR Dubna
0df3ca52 23
ae17f568 24#include <stdlib.h>
0df3ca52 25#include <Riostream.h>
0df3ca52 26#include <TH2.h>
0df3ca52 27#include <TMinuit.h>
28#include <TMatrixD.h>
e939a978 29#include <TRandom.h>
0df3ca52 30
30178c30 31#include "AliMUONClusterFinderAZ.h"
1af223d7 32#include "AliMUONClusterDrawAZ.h"
0627f609 33#include "AliMUONVGeometryDESegmentation.h"
34#include "AliMUONGeometryModuleTransformer.h"
0df3ca52 35#include "AliRun.h"
36#include "AliMUON.h"
0df3ca52 37#include "AliMUONDigit.h"
0df3ca52 38#include "AliMUONRawCluster.h"
39#include "AliMUONClusterInput.h"
40#include "AliMUONPixel.h"
0627f609 41#include "AliMUONMathieson.h"
8c343c7c 42#include "AliLog.h"
0df3ca52 43
13985652 44/// \cond CLASSIMP
0df3ca52 45ClassImp(AliMUONClusterFinderAZ)
13985652 46/// \endcond
0558a292 47
343146bf 48 const Double_t AliMUONClusterFinderAZ::fgkCouplMin = 1.e-3; // threshold on coupling
0627f609 49 const Double_t AliMUONClusterFinderAZ::fgkZeroSuppression = 6; // average zero suppression value
50 const Double_t AliMUONClusterFinderAZ::fgkSaturation = 3000; // average saturation level
0558a292 51 AliMUONClusterFinderAZ* AliMUONClusterFinderAZ::fgClusterFinder = 0x0;
52 TMinuit* AliMUONClusterFinderAZ::fgMinuit = 0x0;
2b1e4f0e 53//FILE *lun1 = fopen("nxny.dat","w");
0df3ca52 54
0df3ca52 55//_____________________________________________________________________________
1af223d7 56AliMUONClusterFinderAZ::AliMUONClusterFinderAZ(Bool_t draw)
54d7ba50 57 : AliMUONClusterFinderVS(),
58 fZpad(0),
59 fNpar(0),
60 fQtot(0),
61 fReco(1),
62 fCathBeg(0),
63 fDraw(0x0),
64 fPixArray(0x0),
65 fnCoupled(0),
66 fDebug(0)
0df3ca52 67{
d19b6003 68/// Constructor
af34d705 69 fnPads[0]=fnPads[1]=0;
70
71 for (Int_t i=0; i<7; i++)
72 for (Int_t j=0; j<fgkDim; j++)
73 fXyq[i][j]= 9999.;
74
0627f609 75 for (Int_t i=0; i<4; i++)
76 for (Int_t j=0; j<fgkDim; j++)
af34d705 77 fPadIJ[i][j]=-1;
0627f609 78
79 for (Int_t i=0; i<2; i++)
80 for (Int_t j=0; j<fgkDim; j++)
af34d705 81 fUsed[i][j] = 0;
af34d705 82
0627f609 83 fSegmentation[1] = fSegmentation[0] = 0x0;
af34d705 84
54d7ba50 85 fPadBeg[0] = fPadBeg[1] = 0;
af34d705 86
0df3ca52 87 if (!fgMinuit) fgMinuit = new TMinuit(8);
af34d705 88 if (!fgClusterFinder) fgClusterFinder = this;
0df3ca52 89 fPixArray = new TObjArray(20);
af34d705 90
1af223d7 91 if (draw) {
92 fDebug = 1;
cc87ebcd 93 fReco = 0;
1af223d7 94 fDraw = new AliMUONClusterDrawAZ(this);
95 }
cc87ebcd 96 cout << " *** Running AZ cluster finder *** " << endl;
0df3ca52 97}
98
99//_____________________________________________________________________________
100AliMUONClusterFinderAZ::~AliMUONClusterFinderAZ()
101{
d19b6003 102/// Destructor
0df3ca52 103 delete fgMinuit; fgMinuit = 0; delete fPixArray; fPixArray = 0;
1af223d7 104 delete fDraw;
0df3ca52 105}
106
107//_____________________________________________________________________________
108void AliMUONClusterFinderAZ::FindRawClusters()
109{
d19b6003 110/// To provide the same interface as in AliMUONClusterFinderVS
0df3ca52 111
1af223d7 112 ResetRawClusters();
0bf8d810 113 EventLoop (gAlice->GetEvNumber(), fInput->Chamber());
0df3ca52 114}
115
116//_____________________________________________________________________________
1af223d7 117void AliMUONClusterFinderAZ::EventLoop(Int_t nev, Int_t ch)
0df3ca52 118{
d19b6003 119/// Loop over digits
0df3ca52 120
1af223d7 121 if (fDraw && !fDraw->FindEvCh(nev, ch)) return;
0df3ca52 122
0627f609 123 fSegmentation[0] = (AliMUONVGeometryDESegmentation*) fInput->
124 Segmentation2(0)->GetDESegmentation(fInput->DetElemId());
125 fSegmentation[1] = (AliMUONVGeometryDESegmentation*) fInput->
126 Segmentation2(1)->GetDESegmentation(fInput->DetElemId());
0df3ca52 127
1af223d7 128 Int_t ndigits[2] = {9,9}, nShown[2] = {0};
cc87ebcd 129 if (fReco != 2) { // skip initialization for the combined cluster / track
130 fCathBeg = fPadBeg[0] = fPadBeg[1] = 0;
131 for (Int_t i = 0; i < 2; i++) {
132 for (Int_t j = 0; j < fgkDim; j++) { fUsed[i][j] = kFALSE; }
133 }
0df3ca52 134 }
135
136next:
cc87ebcd 137 if (fReco == 2 && (nShown[0] || nShown[1])) return; // only one precluster for the combined finder
1af223d7 138 if (ndigits[0] == nShown[0] && ndigits[1] == nShown[1]) return;
139
0df3ca52 140 Float_t xpad, ypad, zpad, zpad0;
0df3ca52 141 Bool_t first = kTRUE;
2b1e4f0e 142 if (fDebug) cout << " *** Event # " << nev << " chamber: " << ch << endl;
0df3ca52 143 fnPads[0] = fnPads[1] = 0;
cc87ebcd 144 for (Int_t i = 0; i < fgkDim; i++) fPadIJ[1][i] = 0;
2b1e4f0e 145
cc87ebcd 146 for (Int_t iii = fCathBeg; iii < 2; iii++) {
0df3ca52 147 Int_t cath = TMath::Odd(iii);
0627f609 148 ndigits[cath] = fInput->NDigits(cath);
2b1e4f0e 149 if (!ndigits[0] && !ndigits[1]) return;
0df3ca52 150 if (ndigits[cath] == 0) continue;
2b1e4f0e 151 if (fDebug) cout << " ndigits: " << ndigits[cath] << " " << cath << endl;
0df3ca52 152
153 AliMUONDigit *mdig;
154 Int_t digit;
155
c1aed84f 156 Bool_t eEOC = kTRUE; // end-of-cluster
cc87ebcd 157 for (digit = fPadBeg[cath]; digit < ndigits[cath]; digit++) {
2b1e4f0e 158 mdig = AliMUONClusterInput::Instance()->Digit(cath,digit);
0df3ca52 159 if (first) {
160 // Find first unused pad
161 if (fUsed[cath][digit]) continue;
0627f609 162 //if (!fSegmentation[cath]->GetPadC(fInput->DetElemId(),mdig->PadX(),mdig->PadY(),xpad,ypad,zpad0)) {
163 if (!fSegmentation[cath]->HasPad(mdig->PadX(), mdig->PadY())) {
5a051e34 164 // Handle "non-existing" pads
165 fUsed[cath][digit] = kTRUE;
166 continue;
167 }
0627f609 168 fSegmentation[cath]->GetPadC(mdig->PadX(), mdig->PadY(), xpad, ypad, zpad0);
0df3ca52 169 } else {
170 if (fUsed[cath][digit]) continue;
0627f609 171 //if (!fSegmentation[cath]->GetPadC(fInput->DetElemId(),mdig->PadX(),mdig->PadY(),xpad,ypad,zpad)) {
172 if (!fSegmentation[cath]->HasPad(mdig->PadX(), mdig->PadY())) {
5a051e34 173 // Handle "non-existing" pads
174 fUsed[cath][digit] = kTRUE;
175 continue;
176 }
0627f609 177 fSegmentation[cath]->GetPadC(mdig->PadX(), mdig->PadY(), xpad, ypad, zpad);
178 //if (TMath::Abs(zpad-zpad0) > 0.1) continue; // different slats
0df3ca52 179 // Find a pad overlapping with the cluster
180 if (!Overlap(cath,mdig)) continue;
181 }
182 // Add pad - recursive call
183 AddPad(cath,digit);
2b1e4f0e 184 //AZ !!!!!! Temporary fix of St1 overlap regions !!!!!!!!
0627f609 185 /*
2b1e4f0e 186 if (cath && ch < 2) {
187 Int_t npads = fnPads[0] + fnPads[1] - 1;
188 Int_t cath1 = fPadIJ[0][npads];
189 Int_t idig = TMath::Nint (fXyq[5][npads]);
190 mdig = AliMUONClusterInput::Instance()->Digit(cath1,idig);
0627f609 191 //fSegmentation[cath1]->GetPadC(fInput->DetElemId(),mdig->PadX(),mdig->PadY(),xpad,ypad,zpad);
192 fSegmentation[cath1]->GetPadC(mdig->PadX(), mdig->PadY(), xpad, ypad, zpad);
2b1e4f0e 193 if (TMath::Abs(zpad-zpad0) > 0.1) zpad0 = zpad;
194 }
0627f609 195 */
c1aed84f 196 eEOC = kFALSE;
0df3ca52 197 if (digit >= 0) break;
198 }
c1aed84f 199 if (first && eEOC) {
0df3ca52 200 // No more unused pads
201 if (cath == 0) continue; // on cathode #0 - check #1
2b1e4f0e 202 else return; // No more clusters
0df3ca52 203 }
c1aed84f 204 if (eEOC) break; // cluster found
0df3ca52 205 first = kFALSE;
2b1e4f0e 206 if (fDebug) cout << " nPads: " << fnPads[cath] << " " << nShown[cath]+fnPads[cath] << " " << cath << endl;
0df3ca52 207 } // for (Int_t iii = 0;
208
2b1e4f0e 209 fZpad = zpad0;
1af223d7 210 if (fDraw) fDraw->DrawCluster();
2b1e4f0e 211
212 // Use MLEM for cluster finder
213 Int_t nMax = 1, localMax[100], maxPos[100];
214 Double_t maxVal[100];
0df3ca52 215
2b1e4f0e 216 if (CheckPrecluster(nShown)) {
217 BuildPixArray();
0627f609 218 //*
219 if (fnPads[0]+fnPads[1] > 50) nMax = FindLocalMaxima(fPixArray, localMax, maxVal);
2b1e4f0e 220 if (nMax > 1) TMath::Sort(nMax, maxVal, maxPos, kTRUE); // in decreasing order
221 Int_t iSimple = 0, nInX = -1, nInY;
222 PadsInXandY(nInX, nInY);
223 if (fDebug) cout << "Pads in X and Y: " << nInX << " " << nInY << endl;
5a051e34 224 if (nMax == 1 && nInX < 4 && nInY < 4) iSimple = 1; //1; // simple cluster
0627f609 225 //*/
226 /* For test
227 Int_t iSimple = 0, nInX = -1, nInY;
228 PadsInXandY(nInX, nInY);
229 if (fDebug) cout << "Pads in X and Y: " << nInX << " " << nInY << endl;
230 if (nMax == 1 && nInX < 4 && nInY < 4) iSimple = 1; //1; // simple cluster
231 if (!iSimple) nMax = FindLocalMaxima(fPixArray, localMax, maxVal);
232 nMax = 1;
233 if (nMax > 1) TMath::Sort(nMax, maxVal, maxPos, kTRUE); // in decreasing order
234 */
2b1e4f0e 235 for (Int_t i=0; i<nMax; i++) {
236 if (nMax > 1) FindCluster(localMax, maxPos[i]);
af82d8d2 237 MainLoop(iSimple);
2b1e4f0e 238 if (i < nMax-1) {
239 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
240 if (fPadIJ[1][j] == 0) continue; // pad charge was not modified
241 fPadIJ[1][j] = 0;
242 fXyq[2][j] = fXyq[6][j]; // use backup charge value
243 }
244 }
0627f609 245 } // for (Int_t i=0; i<nMax;
246 if (nMax > 1) ((TH2D*) gROOT->FindObject("anode"))->Delete();
247 TH2D *mlem = (TH2D*) gROOT->FindObject("mlem");
248 if (mlem) mlem->Delete();
2b1e4f0e 249 }
1af223d7 250 if (!fDraw || fDraw->Next()) goto next;
0df3ca52 251}
252
253//_____________________________________________________________________________
254void AliMUONClusterFinderAZ::AddPad(Int_t cath, Int_t digit)
255{
d19b6003 256/// Add pad to the cluster
257
0627f609 258 AliMUONDigit *mdig = fInput->Digit(cath,digit);
0df3ca52 259
260 Int_t charge = mdig->Signal();
261 // get the center of the pad
0627f609 262 Float_t xpad, ypad, zpad0;
263 //if (!fSegmentation[cath]->GetPadC(fInput->DetElemId(),mdig->PadX(),mdig->PadY(),xpad,ypad,zpad0)) { // Handle "non-existing" pads
264 if (!fSegmentation[cath]->HasPad(mdig->PadX(), mdig->PadY())) {
5a051e34 265 fUsed[cath][digit] = kTRUE;
266 return;
267 }
0627f609 268 fSegmentation[cath]->GetPadC(mdig->PadX(), mdig->PadY(), xpad, ypad, zpad0);
269 Int_t isec = fSegmentation[cath]->Sector(mdig->PadX(), mdig->PadY());
0df3ca52 270 Int_t nPads = fnPads[0] + fnPads[1];
271 fXyq[0][nPads] = xpad;
272 fXyq[1][nPads] = ypad;
273 fXyq[2][nPads] = charge;
0627f609 274 fXyq[3][nPads] = fSegmentation[cath]->Dpx(isec)/2;
275 fXyq[4][nPads] = fSegmentation[cath]->Dpy(isec)/2;
0df3ca52 276 fXyq[5][nPads] = digit;
2b1e4f0e 277 fXyq[6][nPads] = 0;
0df3ca52 278 fPadIJ[0][nPads] = cath;
279 fPadIJ[1][nPads] = 0;
0627f609 280 fPadIJ[2][nPads] = mdig->PadX();
281 fPadIJ[3][nPads] = mdig->PadY();
0df3ca52 282 fUsed[cath][digit] = kTRUE;
0627f609 283 if (fDebug) printf(" bbb %d %d %f %f %f %f %f %4d %3d %3d \n", nPads, cath, xpad, ypad, zpad0, fXyq[3][nPads]*2, fXyq[4][nPads]*2, charge, mdig->PadX(), mdig->PadY());
0df3ca52 284 fnPads[cath]++;
285
286 // Check neighbours
287 Int_t nn, ix, iy, xList[10], yList[10];
288 AliMUONDigit *mdig1;
289
0627f609 290 Int_t ndigits = fInput->NDigits(cath);
291 fSegmentation[cath]->Neighbours(mdig->PadX(), mdig->PadY(), &nn, xList, yList);
292 for (Int_t in = 0; in < nn; in++) {
293 ix = xList[in];
294 iy = yList[in];
0df3ca52 295 for (Int_t digit1 = 0; digit1 < ndigits; digit1++) {
296 if (digit1 == digit) continue;
0627f609 297 mdig1 = fInput->Digit(cath,digit1);
0df3ca52 298 if (!fUsed[cath][digit1] && mdig1->PadX() == ix && mdig1->PadY() == iy) {
299 fUsed[cath][digit1] = kTRUE;
300 // Add pad - recursive call
301 AddPad(cath,digit1);
302 }
303 } //for (Int_t digit1 = 0;
0627f609 304 } // for (Int_t in = 0;
0df3ca52 305}
306
307//_____________________________________________________________________________
2b1e4f0e 308Bool_t AliMUONClusterFinderAZ::Overlap(Int_t cath, AliMUONDigit *mdig)
0df3ca52 309{
d19b6003 310/// Check if the pad from one cathode overlaps with a pad
311/// in the precluster on the other cathode
0df3ca52 312
0df3ca52 313 Float_t xpad, ypad, zpad;
0627f609 314 fSegmentation[cath]->GetPadC(mdig->PadX(), mdig->PadY(), xpad, ypad, zpad);
315 Int_t isec = fSegmentation[cath]->Sector(mdig->PadX(), mdig->PadY());
002920d1 316
2b1e4f0e 317 Float_t xy1[4], xy12[4];
0627f609 318 xy1[0] = xpad - fSegmentation[cath]->Dpx(isec)/2;
319 xy1[1] = xy1[0] + fSegmentation[cath]->Dpx(isec);
320 xy1[2] = ypad - fSegmentation[cath]->Dpy(isec)/2;
321 xy1[3] = xy1[2] + fSegmentation[cath]->Dpy(isec);
0df3ca52 322 //cout << " ok " << fnPads[0]+fnPads[1] << xy1[0] << xy1[1] << xy1[2] << xy1[3] << endl;
323
324 Int_t cath1 = TMath::Even(cath);
325 for (Int_t i=0; i<fnPads[0]+fnPads[1]; i++) {
326 if (fPadIJ[0][i] != cath1) continue;
327 if (Overlap(xy1, i, xy12, 0)) return kTRUE;
328 }
329 return kFALSE;
330}
331
332//_____________________________________________________________________________
333Bool_t AliMUONClusterFinderAZ::Overlap(Float_t *xy1, Int_t iPad, Float_t *xy12, Int_t iSkip)
334{
d19b6003 335/// Check if the pads xy1 and iPad overlap and return overlap area
0df3ca52 336
337 Float_t xy2[4];
338 xy2[0] = fXyq[0][iPad] - fXyq[3][iPad];
339 xy2[1] = fXyq[0][iPad] + fXyq[3][iPad];
340 if (xy1[0] > xy2[1]-1.e-4 || xy1[1] < xy2[0]+1.e-4) return kFALSE;
341 xy2[2] = fXyq[1][iPad] - fXyq[4][iPad];
342 xy2[3] = fXyq[1][iPad] + fXyq[4][iPad];
343 if (xy1[2] > xy2[3]-1.e-4 || xy1[3] < xy2[2]+1.e-4) return kFALSE;
344 if (!iSkip) return kTRUE; // just check overlap (w/out computing the area)
345 xy12[0] = TMath::Max (xy1[0],xy2[0]);
346 xy12[1] = TMath::Min (xy1[1],xy2[1]);
347 xy12[2] = TMath::Max (xy1[2],xy2[2]);
348 xy12[3] = TMath::Min (xy1[3],xy2[3]);
349 return kTRUE;
350}
351
0df3ca52 352//_____________________________________________________________________________
353Bool_t AliMUONClusterFinderAZ::CheckPrecluster(Int_t *nShown)
354{
d19b6003 355/// Check precluster in order to attempt to simplify it (mostly for
356/// two-cathode preclusters)
0df3ca52 357
2b1e4f0e 358 Int_t i1, i2, cath=0, digit=0;
0df3ca52 359 Float_t xy1[4], xy12[4];
360
361 Int_t npad = fnPads[0] + fnPads[1];
2b1e4f0e 362 if (npad == 1) {
363 // Disregard one-pad clusters (leftovers from splitting)
364 nShown[0] += fnPads[0];
365 nShown[1] += fnPads[1];
366 return kFALSE;
367 }
0df3ca52 368
369 // If pads have the same size take average of pads on both cathodes
0627f609 370 //Int_t sameSize = (fnPads[0] && fnPads[1]) ? 1 : 0;
371 Int_t sameSize = 0; //AZ - 17-01-06
372
0df3ca52 373 if (sameSize) {
374 Double_t xSize = -1, ySize = 0;
375 for (Int_t i=0; i<npad; i++) {
376 if (fXyq[2][i] < 0) continue;
377 if (xSize < 0) { xSize = fXyq[3][i]; ySize = fXyq[4][i]; }
378 if (TMath::Abs(xSize-fXyq[3][i]) > 1.e-4 || TMath::Abs(ySize-fXyq[4][i]) > 1.e-4) { sameSize = 0; break; }
379 }
380 } // if (sameSize)
2b1e4f0e 381 if (sameSize && fnPads[0] == 1 && fnPads[1] == 1) sameSize = 0; //AZ
5a051e34 382 // Handle shift by half a pad in Station 1
383 if (sameSize) {
384 Int_t cath0 = fPadIJ[0][0];
385 for (Int_t i = 1; i < npad; i++) {
386 if (fPadIJ[0][i] == cath0) continue;
387 Double_t dx = TMath::Abs ((fXyq[0][i] - fXyq[0][0]) / fXyq[3][i] / 2);
388 Int_t idx = (Int_t) TMath::Abs ((fXyq[0][i] - fXyq[0][0]) / fXyq[3][i] / 2);
389 if (TMath::Abs (dx - idx) > 0.001) sameSize = 0;
390 break;
391 }
392 } // if (sameSize)
393
2b1e4f0e 394 if (sameSize && (fnPads[0] >= 2 || fnPads[1] >= 2)) {
0df3ca52 395 nShown[0] += fnPads[0];
396 nShown[1] += fnPads[1];
397 fnPads[0] = fnPads[1] = 0;
398 Int_t div;
399 for (Int_t i=0; i<npad; i++) {
400 if (fXyq[2][i] < 0) continue; // used pad
401 fXyq[2][fnPads[0]] = fXyq[2][i];
402 div = 1;
2b1e4f0e 403 cath = fPadIJ[0][i];
0df3ca52 404 for (Int_t j=i+1; j<npad; j++) {
405 if (fPadIJ[0][j] == fPadIJ[0][i]) continue; // same cathode
406 if (TMath::Abs(fXyq[0][j]-fXyq[0][i]) > 1.e-4) continue;
407 if (TMath::Abs(fXyq[1][j]-fXyq[1][i]) > 1.e-4) continue;
408 fXyq[2][fnPads[0]] += fXyq[2][j];
409 div = 2;
410 fXyq[2][j] = -2;
2b1e4f0e 411 if (cath) fXyq[5][fnPads[0]] = fXyq[5][j]; // save digit number for cath 0
0df3ca52 412 break;
413 }
2b1e4f0e 414 // Flag that the digit from the other cathode
415 if (cath && div == 1) fXyq[5][fnPads[0]] = -fXyq[5][i] - 1;
416 // If low pad charge take the other equal to 0
0627f609 417 //if (div == 1 && fXyq[2][fnPads[0]] < fgkZeroSuppression + 1.5*3) div = 2;
0df3ca52 418 fXyq[2][fnPads[0]] /= div;
419 fXyq[0][fnPads[0]] = fXyq[0][i];
420 fXyq[1][fnPads[0]] = fXyq[1][i];
0627f609 421 fPadIJ[2][fnPads[0]] = fPadIJ[2][i];
422 fPadIJ[3][fnPads[0]] = fPadIJ[3][i];
0df3ca52 423 fPadIJ[0][fnPads[0]++] = 0;
424 }
425 } // if (sameSize)
426
427 // Check if one-cathode precluster
428 i1 = fnPads[0]!=0 ? 0 : 1;
429 i2 = fnPads[1]!=0 ? 1 : 0;
430
431 if (i1 != i2) { // two-cathode
432
433 Int_t *flags = new Int_t[npad];
434 for (Int_t i=0; i<npad; i++) { flags[i] = 0; }
435
436 // Check pad overlaps
437 for (Int_t i=0; i<npad; i++) {
438 if (fPadIJ[0][i] != i1) continue;
439 xy1[0] = fXyq[0][i] - fXyq[3][i];
440 xy1[1] = fXyq[0][i] + fXyq[3][i];
441 xy1[2] = fXyq[1][i] - fXyq[4][i];
442 xy1[3] = fXyq[1][i] + fXyq[4][i];
443 for (Int_t j=0; j<npad; j++) {
444 if (fPadIJ[0][j] != i2) continue;
445 if (!Overlap(xy1, j, xy12, 0)) continue;
446 flags[i] = flags[j] = 1; // mark overlapped pads
447 } // for (Int_t j=0;
448 } // for (Int_t i=0;
449
450 // Check if all pads overlap
2b1e4f0e 451 Int_t nFlags=0;
452 for (Int_t i=0; i<npad; i++) {
453 if (flags[i]) continue;
454 nFlags ++;
1af223d7 455 if (fDebug) cout << i << " " << fPadIJ[0][i] << " " << fXyq[0][i] << " " << fXyq[1][i] << endl;
2b1e4f0e 456 }
457 if (fDebug && nFlags) cout << " nFlags = " << nFlags << endl;
0df3ca52 458 //if (nFlags > 2 || (Float_t)nFlags / npad > 0.2) { // why 2 ??? - empirical choice
0627f609 459 if (nFlags > 0) {
0df3ca52 460 for (Int_t i=0; i<npad; i++) {
461 if (flags[i]) continue;
462 digit = TMath::Nint (fXyq[5][i]);
463 cath = fPadIJ[0][i];
1af223d7 464 // Check for edge effect (missing pads on the other cathode)
465 Int_t cath1 = TMath::Even(cath), ix, iy;
0627f609 466 ix = iy = 0;
467 //if (!fSegmentation[cath1]->GetPadI(fInput->DetElemId(),fXyq[0][i],fXyq[1][i],fZpad,ix,iy)) continue;
468 if (!fSegmentation[cath1]->HasPad(fXyq[0][i], fXyq[1][i], fZpad)) continue;
469 if (nFlags == 1 && fXyq[2][i] < fgkZeroSuppression * 3) continue;
0df3ca52 470 fUsed[cath][digit] = kFALSE; // release pad
471 fXyq[2][i] = -2;
472 fnPads[cath]--;
473 }
cc87ebcd 474 if (fDraw) fDraw->UpdateCluster(npad);
0df3ca52 475 } // if (nFlags > 2)
476
477 // Check correlations of cathode charges
478 if (fnPads[0] && fnPads[1]) { // two-cathode
479 Double_t sum[2]={0};
480 Int_t over[2] = {1, 1};
481 for (Int_t i=0; i<npad; i++) {
482 cath = fPadIJ[0][i];
483 if (fXyq[2][i] > 0) sum[cath] += fXyq[2][i];
0627f609 484 if (fXyq[2][i] > fgkSaturation-1) over[cath] = 0;
0df3ca52 485 }
2b1e4f0e 486 if (fDebug) cout << " Total charge: " << sum[0] << " " << sum[1] << endl;
0df3ca52 487 if ((over[0] || over[1]) && TMath::Abs(sum[0]-sum[1])/(sum[0]+sum[1])*2 > 1) { // 3 times difference
2b1e4f0e 488 if (fDebug) cout << " Release " << endl;
0df3ca52 489 // Big difference
cc87ebcd 490 cath = sum[0] > sum[1] ? 0 : 1;
491 Int_t imax = 0, imin = 0;
492 Double_t cmax = -1, cmin = 9999, dxMin = 0, dyMin = 0;
0df3ca52 493 Double_t *dist = new Double_t[npad];
cc87ebcd 494 for (Int_t i = 0; i < npad; i++) {
495 if (fPadIJ[0][i] != cath || fXyq[2][i] < 0) continue;
496 if (fXyq[2][i] < cmin) {
497 cmin = fXyq[2][i];
498 imin = i;
499 }
0df3ca52 500 if (fXyq[2][i] < cmax) continue;
501 cmax = fXyq[2][i];
502 imax = i;
503 }
504 // Arrange pads according to their distance to the max,
505 // normalized to the pad size
cc87ebcd 506 for (Int_t i = 0; i < npad; i++) {
0df3ca52 507 dist[i] = 0;
cc87ebcd 508 if (fPadIJ[0][i] != cath || fXyq[2][i] < 0) continue;
0df3ca52 509 if (i == imax) continue;
cc87ebcd 510 Double_t dx = (fXyq[0][i] - fXyq[0][imax]) / fXyq[3][imax] / 2;
511 Double_t dy = (fXyq[1][i] - fXyq[1][imax]) / fXyq[4][imax] / 2;
512 dist[i] = TMath::Sqrt (dx * dx + dy * dy);
513 if (i == imin) {
e8fb921b 514 cmin = dist[i] + 0.001; // distance to the pad with minimum charge
cc87ebcd 515 dxMin = dx;
516 dyMin = dy;
517 }
0df3ca52 518 }
519 TMath::Sort(npad, dist, flags, kFALSE); // in increasing order
520 Int_t indx;
521 Double_t xmax = -1;
cc87ebcd 522 for (Int_t i = 0; i < npad; i++) {
0df3ca52 523 indx = flags[i];
cc87ebcd 524 if (fPadIJ[0][indx] != cath || fXyq[2][indx] < 0) continue;
525 if (dist[indx] > cmin) {
526 // Farther than the minimum pad
527 Double_t dx = (fXyq[0][indx] - fXyq[0][imax]) / fXyq[3][imax] / 2;
528 Double_t dy = (fXyq[1][indx] - fXyq[1][imax]) / fXyq[4][imax] / 2;
529 dx *= dxMin;
530 dy *= dyMin;
531 if (dx >= 0 && dy >= 0) continue;
532 if (TMath::Abs(dx) > TMath::Abs(dy) && dx >= 0) continue;
533 if (TMath::Abs(dy) > TMath::Abs(dx) && dy >= 0) continue;
534 }
535 if (fXyq[2][indx] <= cmax || TMath::Abs(dist[indx]-xmax) < 1.e-3) {
0df3ca52 536 // Release pads
cc87ebcd 537 if (TMath::Abs(dist[indx]-xmax) < 1.e-3)
cd747ddb 538 cmax = TMath::Max((Double_t)(fXyq[2][indx]),cmax);
0df3ca52 539 else cmax = fXyq[2][indx];
540 xmax = dist[indx];
541 digit = TMath::Nint (fXyq[5][indx]);
542 fUsed[cath][digit] = kFALSE;
543 fXyq[2][indx] = -2;
544 fnPads[cath]--;
cc87ebcd 545 }
546 } // for (Int_t i = 0; i < npad;
547
548 // Check pad overlaps once more
549 for (Int_t j = 0; j < npad; j++) flags[j] = 0;
550 for (Int_t k = 0; k < npad; k++) {
551 if (fXyq[2][k] < 0 || fPadIJ[0][k] != i1) continue;
552 xy1[0] = fXyq[0][k] - fXyq[3][k];
553 xy1[1] = fXyq[0][k] + fXyq[3][k];
554 xy1[2] = fXyq[1][k] - fXyq[4][k];
555 xy1[3] = fXyq[1][k] + fXyq[4][k];
556 for (Int_t j = 0; j < npad; j++) {
557 if (fXyq[2][j] < 0) continue;
558 if (fPadIJ[0][j] != i2) continue;
559 if (!Overlap(xy1, j, xy12, 0)) continue;
560 flags[k] = flags[j] = 1; // mark overlapped pads
561 } // for (Int_t j = 0;
562 } // for (Int_t k = 0;
563 nFlags = 0;
564 for (Int_t j = 0; j < npad; j++) {
565 if (fXyq[2][j] < 0 || flags[j]) continue;
566 nFlags ++;
567 }
568 if (nFlags == fnPads[0] + fnPads[1]) {
569 // No overlap
570 for (Int_t j = 0; j < npad; j++) {
571 if (fXyq[2][j] < 0 || fPadIJ[0][j] != cath) continue;
572 fXyq[2][j] = -2;
573 fnPads[cath]--;
0df3ca52 574 }
cc87ebcd 575 }
0df3ca52 576 delete [] dist; dist = 0;
cc87ebcd 577 if (fDraw) fDraw->UpdateCluster(npad);
0df3ca52 578 } // TMath::Abs(sum[0]-sum[1])...
579 } // if (fnPads[0] && fnPads[1])
580 delete [] flags; flags = 0;
581 } // if (i1 != i2)
582
583 if (!sameSize) { nShown[0] += fnPads[0]; nShown[1] += fnPads[1]; }
584
585 // Move released pads to the right
586 Int_t beg = 0, end = npad-1, padij;
587 Double_t xyq;
588 while (beg < end) {
589 if (fXyq[2][beg] > 0) { beg++; continue; }
590 for (Int_t j=end; j>beg; j--) {
591 if (fXyq[2][j] < 0) continue;
592 end = j - 1;
0627f609 593 for (Int_t j1=0; j1<4; j1++) {
0df3ca52 594 padij = fPadIJ[j1][beg];
595 fPadIJ[j1][beg] = fPadIJ[j1][j];
596 fPadIJ[j1][j] = padij;
597 }
598 for (Int_t j1=0; j1<6; j1++) {
599 xyq = fXyq[j1][beg];
600 fXyq[j1][beg] = fXyq[j1][j];
601 fXyq[j1][j] = xyq;
602 }
603 break;
604 } // for (Int_t j=end;
605 beg++;
606 } // while
607 npad = fnPads[0] + fnPads[1];
94eb555e 608 if (npad > 500) {
609 AliWarning(Form(" *** Too large cluster. Give up. %d ", npad));
610 return kFALSE;
611 }
0df3ca52 612 // Back up charge value
1af223d7 613 for (Int_t j = 0; j < npad; j++) fXyq[6][j] = fXyq[2][j];
0df3ca52 614
615 return kTRUE;
616}
617
618//_____________________________________________________________________________
619void AliMUONClusterFinderAZ::BuildPixArray()
620{
d19b6003 621/// Build pixel array for MLEM method
0df3ca52 622
623 Int_t nPix=0, i1, i2;
624 Float_t xy1[4], xy12[4];
625 AliMUONPixel *pixPtr=0;
626
627 Int_t npad = fnPads[0] + fnPads[1];
628
629 // One cathode is empty
630 i1 = fnPads[0]!=0 ? 0 : 1;
631 i2 = fnPads[1]!=0 ? 1 : 0;
632
633 // Build array of pixels on anode plane
634 if (i1 == i2) { // one-cathode precluster
635 for (Int_t j=0; j<npad; j++) {
636 pixPtr = new AliMUONPixel();
637 for (Int_t i=0; i<2; i++) {
638 pixPtr->SetCoord(i, fXyq[i][j]); // pixel coordinates
639 pixPtr->SetSize(i, fXyq[i+3][j]); // pixel size
640 }
641 pixPtr->SetCharge(fXyq[2][j]); // charge
642 fPixArray->Add((TObject*)pixPtr);
643 nPix++;
644 }
645 } else { // two-cathode precluster
5a051e34 646 i1 = fPadIJ[0][0];
647 i2 = TMath::Even (i1);
648 for (Int_t i = 0; i < npad; i++) {
0df3ca52 649 if (fPadIJ[0][i] != i1) continue;
650 xy1[0] = fXyq[0][i] - fXyq[3][i];
651 xy1[1] = fXyq[0][i] + fXyq[3][i];
652 xy1[2] = fXyq[1][i] - fXyq[4][i];
653 xy1[3] = fXyq[1][i] + fXyq[4][i];
5a051e34 654 for (Int_t j = 1; j < npad; j++) {
0df3ca52 655 if (fPadIJ[0][j] != i2) continue;
656 if (!Overlap(xy1, j, xy12, 1)) continue;
657 pixPtr = new AliMUONPixel();
658 for (Int_t k=0; k<2; k++) {
659 pixPtr->SetCoord(k, (xy12[2*k]+xy12[2*k+1])/2); // pixel coordinates
660 pixPtr->SetSize(k, xy12[2*k+1]-pixPtr->Coord(k)); // size
661 }
662 pixPtr->SetCharge(TMath::Min (fXyq[2][i],fXyq[2][j])); //charge
663 fPixArray->Add((TObject*)pixPtr);
2b1e4f0e 664 //cout << nPix << " " << pixPtr->Coord(0) << " " << pixPtr->Size(0) << " " << pixPtr->Coord(1) << " " << pixPtr->Size(1) << " " << pixPtr->Charge() << endl;
0df3ca52 665 nPix++;
666 } // for (Int_t j=0;
667 } // for (Int_t i=0;
668 } // else
669
5a051e34 670 Float_t xPadMin = 999, yPadMin = 999;
671 for (Int_t i = 0; i < npad; i++) {
672 xPadMin = TMath::Min (xPadMin, fXyq[3][i]);
673 yPadMin = TMath::Min (yPadMin, fXyq[4][i]);
674 }
675 if (fDebug) cout << xPadMin << " " << yPadMin << endl;
676
677 Float_t wxmin = 999, wymin = 999;
678 for (Int_t i = 0; i < nPix; i++) {
679 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
680 wxmin = TMath::Min ((Double_t)wxmin, pixPtr->Size(0));
681 wymin = TMath::Min ((Double_t)wymin, pixPtr->Size(1));
0df3ca52 682 }
2b1e4f0e 683 if (fDebug) cout << wxmin << " " << wymin << endl;
5a051e34 684 wxmin = TMath::Abs (wxmin - xPadMin/2) > 0.001 ? xPadMin : xPadMin / 2;
685 wymin = TMath::Abs (wymin - yPadMin/2) > 0.001 ? yPadMin : yPadMin / 2;
686 //wxmin = xPadMin; wymin = yPadMin;
0df3ca52 687
688 // Check if small pixel X-size
2b1e4f0e 689 AdjustPixel(wxmin, 0);
0df3ca52 690 // Check if small pixel Y-size
2b1e4f0e 691 AdjustPixel(wymin, 1);
0df3ca52 692 // Check if large pixel size
2b1e4f0e 693 AdjustPixel(wxmin, wymin);
0df3ca52 694
695 // Remove discarded pixels
696 for (Int_t i=0; i<nPix; i++) {
697 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
698 //pixPtr->Print();
699 if (pixPtr->Charge() < 1) { fPixArray->RemoveAt(i); delete pixPtr; }// discarded pixel
700 }
701 fPixArray->Compress();
702 nPix = fPixArray->GetEntriesFast();
703
704 if (nPix > npad) {
2b1e4f0e 705 if (fDebug) cout << nPix << endl;
0df3ca52 706 // Too many pixels - sort and remove pixels with the lowest signal
707 fPixArray->Sort();
708 for (Int_t i=npad; i<nPix; i++) {
709 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
710 //pixPtr->Print();
711 fPixArray->RemoveAt(i);
712 delete pixPtr;
713 }
714 nPix = npad;
715 } // if (nPix > npad)
716
717 // Set pixel charges to the same value (for MLEM)
718 for (Int_t i=0; i<nPix; i++) {
719 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
720 //pixPtr->SetCharge(10);
2b1e4f0e 721 if (fDebug) cout << i+1 << " " << pixPtr->Coord(0) << " " << pixPtr->Coord(1) << " " << pixPtr->Size(0) << " " << pixPtr->Size(1) << endl;
0df3ca52 722 }
723}
724
725//_____________________________________________________________________________
2b1e4f0e 726void AliMUONClusterFinderAZ::AdjustPixel(Float_t width, Int_t ixy)
0df3ca52 727{
d19b6003 728/// Check if some pixels have small size (adjust if necessary)
0df3ca52 729
730 AliMUONPixel *pixPtr, *pixPtr1 = 0;
731 Int_t ixy1 = TMath::Even(ixy);
732 Int_t nPix = fPixArray->GetEntriesFast();
733
734 for (Int_t i=0; i<nPix; i++) {
735 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
736 if (pixPtr->Charge() < 1) continue; // discarded pixel
737 if (pixPtr->Size(ixy)-width < -1.e-4) {
738 // try to merge
2b1e4f0e 739 if (fDebug) cout << i << " Small X or Y: " << ixy << " " << pixPtr->Size(ixy) << " " << width << " " << pixPtr->Coord(0) << " " << pixPtr->Coord(1) << endl;
0df3ca52 740 for (Int_t j=i+1; j<nPix; j++) {
741 pixPtr1 = (AliMUONPixel*) fPixArray->UncheckedAt(j);
742 if (pixPtr1->Charge() < 1) continue; // discarded pixel
743 if (TMath::Abs(pixPtr1->Size(ixy)-width) < 1.e-4) continue; // right size
744 if (TMath::Abs(pixPtr1->Coord(ixy1)-pixPtr->Coord(ixy1)) > 1.e-4) continue; // different rows/columns
745 if (TMath::Abs(pixPtr1->Coord(ixy)-pixPtr->Coord(ixy)) < 2*width) {
746 // merge
2b1e4f0e 747 Double_t tmp = pixPtr->Coord(ixy) + pixPtr1->Size(ixy) *
748 TMath::Sign (1., pixPtr1->Coord(ixy) - pixPtr->Coord(ixy));
749 pixPtr->SetCoord(ixy, tmp);
0df3ca52 750 pixPtr->SetSize(ixy, width);
0df3ca52 751 pixPtr->SetCharge(TMath::Min (pixPtr->Charge(),pixPtr1->Charge()));
752 pixPtr1->SetCharge(0);
753 pixPtr1 = 0;
754 break;
755 }
756 } // for (Int_t j=i+1;
757 //if (!pixPtr1) { cout << " I am here!" << endl; pixPtr->SetSize(ixy, width); } // ???
758 //else if (pixPtr1->Charge() > 0.5 || i == nPix-1) {
759 if (pixPtr1 || i == nPix-1) {
760 // edge pixel - just increase its size
2b1e4f0e 761 if (fDebug) cout << " Edge ..." << endl;
0df3ca52 762 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2b1e4f0e 763 //if (fPadIJ[0][j] != ixy1) continue;
5a051e34 764 //???-check if (TMath::Abs(pixPtr->Coord(ixy1)-fXyq[ixy1][j]) > 1.e-4) continue;
0df3ca52 765 if (pixPtr->Coord(ixy) < fXyq[ixy][j])
2b1e4f0e 766 //pixPtr->Shift(ixy, -pixPtr->Size(ixy));
767 pixPtr->Shift(ixy, pixPtr->Size(ixy)-width);
768 //else pixPtr->Shift(ixy, pixPtr->Size(ixy));
769 else pixPtr->Shift(ixy, -pixPtr->Size(ixy)+width);
0df3ca52 770 pixPtr->SetSize(ixy, width);
771 break;
772 }
773 }
774 } // if (pixPtr->Size(ixy)-width < -1.e-4)
775 } // for (Int_t i=0; i<nPix;
776 return;
777}
778
779//_____________________________________________________________________________
2b1e4f0e 780void AliMUONClusterFinderAZ::AdjustPixel(Float_t wxmin, Float_t wymin)
0df3ca52 781{
d19b6003 782/// Check if some pixels have large size (adjust if necessary)
0df3ca52 783
cc87ebcd 784 Int_t n1[2], n2[2], iOK = 1, nPix = fPixArray->GetEntriesFast();
785 AliMUONPixel *pixPtr, pix;
af82d8d2 786 Double_t xy0[2] = {9999, 9999}, wxy[2], dist[2] = {0};
0df3ca52 787
788 // Check if large pixel size
cc87ebcd 789 for (Int_t i = 0; i < nPix; i++) {
0df3ca52 790 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
791 if (pixPtr->Charge() < 1) continue; // discarded pixel
cc87ebcd 792 if (pixPtr->Size(0) - wxmin < 1.e-4) {
793 if (xy0[0] > 9998) xy0[0] = pixPtr->Coord(0); // position of a "normal" pixel
794 if (pixPtr->Size(1) - wymin < 1.e-4) {
795 if (xy0[1] > 9998) xy0[1] = pixPtr->Coord(1); // position of a "normal" pixel
796 continue;
797 } else iOK = 0; // large pixel
798 } else {
799 iOK = 0; // large pixel
800 if (xy0[1] > 9998 && pixPtr->Size(1) - wymin < 1.e-4) xy0[1] = pixPtr->Coord(1); // "normal" pixel
801 }
802 if (xy0[0] < 9998 && xy0[1] < 9998) break;
803 }
804 if (iOK) return;
805
806 wxy[0] = wxmin;
807 wxy[1] = wymin;
808 //cout << xy0[0] << " " << xy0[1] << endl;
809 for (Int_t i = 0; i < nPix; i++) {
810 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
811 if (pixPtr->Charge() < 1) continue; // discarded pixel
812 n1[0] = n1[1] = 999;
813 n2[0] = n2[1] = 1;
814 for (Int_t j = 0; j < 2; j++) {
815 if (pixPtr->Size(j) - wxy[j] < 1.e-4) continue;
816 dist[j] = (pixPtr->Coord(j) - xy0[j]) / wxy[j] / 2; // normalized distance to "normal" pixel
817 n2[j] = TMath::Nint (pixPtr->Size(j) / wxy[j]);
818 n1[j] = n2[j] == 1 ? TMath::Nint(dist[j]) : (Int_t)dist[j];
819 }
820 if (n1[0] > 998 && n1[1] > 998) continue;
821 if (fDebug) cout << " Different " << pixPtr->Size(0) << " " << wxy[0] << " "
822 << pixPtr->Size(1) << " " << wxy[1] <<endl;
823
0627f609 824 if (n2[0] > 2 || n2[1] > 2) {
94eb555e 825 //cout << n2[0] << " " << n2[1] << endl;
0627f609 826 if (n2[0] > 2 && n1[0] < 999) n1[0]--;
827 if (n2[1] > 2 && n1[1] < 999) n1[1]--;
828 }
cc87ebcd 829 //cout << n1[0] << " " << n2[0] << " " << n1[1] << " " << n2[1] << endl;
830 pix = *pixPtr;
831 pix.SetSize(0, wxy[0]); pix.SetSize(1, wxy[1]);
832 //pixPtr->Print();
833 for (Int_t ii = 0; ii < n2[0]; ii++) {
834 if (n1[0] < 999) pix.SetCoord(0, xy0[0] + (n1[0] + TMath::Sign(1.,dist[0]) * ii) * 2 * wxy[0]);
835 for (Int_t jj = 0; jj < n2[1]; jj++) {
836 if (n1[1] < 999) pix.SetCoord(1, xy0[1] + (n1[1] + TMath::Sign(1.,dist[1]) * jj) * 2 * wxy[1]);
837 fPixArray->Add(new AliMUONPixel(pix));
838 //pix.Print();
0df3ca52 839 }
0df3ca52 840 }
cc87ebcd 841 pixPtr->SetCharge(0);
842 } // for (Int_t i = 0; i < nPix;
0df3ca52 843}
844
845//_____________________________________________________________________________
2b1e4f0e 846Bool_t AliMUONClusterFinderAZ::MainLoop(Int_t iSimple)
0df3ca52 847{
d19b6003 848/// Repeat MLEM algorithm until pixel size becomes sufficiently small
0df3ca52 849
850 TH2D *mlem;
851
852 Int_t ix, iy;
853 //Int_t nn, xList[10], yList[10];
854 Int_t nPix = fPixArray->GetEntriesFast();
0df3ca52 855 AliMUONPixel *pixPtr = 0;
856 Double_t *coef = 0, *probi = 0;
2b1e4f0e 857 AddVirtualPad(); // add virtual pads if necessary
858 Int_t npadTot = fnPads[0] + fnPads[1], npadOK = 0;
1af223d7 859 for (Int_t i = 0; i < npadTot; i++) if (fPadIJ[1][i] == 0) npadOK++;
860 if (fDraw) fDraw->ResetMuon();
0df3ca52 861
862 while (1) {
863
864 mlem = (TH2D*) gROOT->FindObject("mlem");
865 if (mlem) mlem->Delete();
866 // Calculate coefficients
2b1e4f0e 867 if (fDebug) cout << " nPix, npadTot, npadOK " << nPix << " " << npadTot << " " << npadOK << endl;
0df3ca52 868
869 // Calculate coefficients and pixel visibilities
870 coef = new Double_t [npadTot*nPix];
871 probi = new Double_t [nPix];
2b1e4f0e 872 for (Int_t ipix=0; ipix<nPix; ipix++) probi[ipix] = 0;
873 Int_t indx = 0, indx1 = 0, cath = 0;
874
875 for (Int_t j=0; j<npadTot; j++) {
876 indx = j*nPix;
877 if (fPadIJ[1][j] == 0) {
0df3ca52 878 cath = fPadIJ[0][j];
0627f609 879 ix = fPadIJ[2][j];
880 iy = fPadIJ[3][j];
881 fSegmentation[cath]->SetPad(ix, iy);
2b1e4f0e 882 /*
883 fSegmentation[cath]->Neighbours(fInput->DetElemId(),ix,iy,&nn,xList,yList);
884 if (nn != 4) {
885 cout << nn << ": ";
886 for (Int_t i=0; i<nn; i++) {cout << xList[i] << " " << yList[i] << ", ";}
887 cout << endl;
888 }
889 */
890 }
891
892 for (Int_t ipix=0; ipix<nPix; ipix++) {
893 indx1 = indx + ipix;
894 if (fPadIJ[1][j] < 0) { coef[indx1] = 0; continue; }
895 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(ipix);
0627f609 896 fSegmentation[cath]->SetHit(pixPtr->Coord(0), pixPtr->Coord(1), fZpad);
897 coef[indx1] = fInput->Mathieson()->IntXY(fInput->DetElemId(),fInput->Segmentation2(cath));
2b1e4f0e 898 probi[ipix] += coef[indx1];
899 } // for (Int_t ipix=0;
900 } // for (Int_t j=0;
901 for (Int_t ipix=0; ipix<nPix; ipix++) if (probi[ipix] < 0.01) pixPtr->SetCharge(0); // "invisible" pixel
0df3ca52 902
903 // MLEM algorithm
2b1e4f0e 904 Mlem(coef, probi, 15);
0df3ca52 905
cd747ddb 906 Double_t xylim[4] = {999, 999, 999, 999};
0df3ca52 907 for (Int_t ipix=0; ipix<nPix; ipix++) {
908 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(ipix);
cc87ebcd 909 //cout << ipix+1; pixPtr->Print();
0df3ca52 910 for (Int_t i=0; i<4; i++)
911 xylim[i] = TMath::Min (xylim[i], (i%2 ? -1 : 1)*pixPtr->Coord(i/2));
0df3ca52 912 }
913 for (Int_t i=0; i<4; i++) {
2b1e4f0e 914 xylim[i] -= pixPtr->Size(i/2); if (fDebug) cout << (i%2 ? -1 : 1)*xylim[i] << " "; }
915 if (fDebug) cout << endl;
0df3ca52 916
2b1e4f0e 917 // Adjust histogram to approximately the same limits as for the pads
0df3ca52 918 // (for good presentation)
1af223d7 919 if (fDraw) fDraw->AdjustHist(xylim, pixPtr);
920
0df3ca52 921 Int_t nx = TMath::Nint ((-xylim[1]-xylim[0])/pixPtr->Size(0)/2);
922 Int_t ny = TMath::Nint ((-xylim[3]-xylim[2])/pixPtr->Size(1)/2);
2b1e4f0e 923
0df3ca52 924 mlem = new TH2D("mlem","mlem",nx,xylim[0],-xylim[1],ny,xylim[2],-xylim[3]);
925 for (Int_t ipix=0; ipix<nPix; ipix++) {
926 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(ipix);
927 mlem->Fill(pixPtr->Coord(0),pixPtr->Coord(1),pixPtr->Charge());
928 }
1af223d7 929 if (fDraw) fDraw->DrawHist("c2", mlem);
0df3ca52 930
931 // Check if the total charge of pixels is too low
932 Double_t qTot = 0;
933 for (Int_t i=0; i<nPix; i++) {
934 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
935 qTot += pixPtr->Charge();
936 }
2b1e4f0e 937 if (qTot < 1.e-4 || npadOK < 3 && qTot < 7) {
0df3ca52 938 delete [] coef; delete [] probi; coef = 0; probi = 0;
939 fPixArray->Delete();
2b1e4f0e 940 for (Int_t i=0; i<npadTot; i++) if (fPadIJ[1][i] == 0) fPadIJ[1][i] = -1;
0df3ca52 941 return kFALSE;
942 }
943
944 // Plot data - expectation
945 /*
946 Double_t x, y, cont;
947 for (Int_t j=0; j<npadTot; j++) {
948 Double_t sum1 = 0;
949 for (Int_t i=0; i<nPix; i++) {
950 // Caculate expectation
951 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
952 sum1 += pixPtr->Charge()*coef[j*nPix+i];
953 }
0627f609 954 sum1 = TMath::Min (sum1,fgkSaturation);
0df3ca52 955 x = fXyq[0][j];
956 y = fXyq[1][j];
957 cath = fPadIJ[0][j];
958 Int_t ihist = cath*2;
959 ix = fHist[ihist]->GetXaxis()->FindBin(x);
960 iy = fHist[ihist]->GetYaxis()->FindBin(y);
961 cont = fHist[ihist]->GetCellContent(ix,iy);
962 if (cont == 0 && fHist[ihist+1]) {
963 ihist += 1;
964 ix = fHist[ihist]->GetXaxis()->FindBin(x);
965 iy = fHist[ihist]->GetYaxis()->FindBin(y);
966 }
967 fHist[ihist]->SetBinContent(ix,iy,fXyq[2][j]-sum1);
968 }
969 ((TCanvas*)gROOT->FindObject("c1"))->cd(1);
970 //gPad->SetTheta(55);
971 //gPad->SetPhi(30);
972 //mlem->Draw("lego1");
973 gPad->Modified();
974 ((TCanvas*)gROOT->FindObject("c1"))->cd(2);
975 gPad->Modified();
976 */
977
2b1e4f0e 978 if (iSimple) {
979 // Simple cluster - skip further passes thru EM-procedure
2b1e4f0e 980 Simple();
981 delete [] coef; delete [] probi; coef = 0; probi = 0;
982 fPixArray->Delete();
983 return kTRUE;
984 }
985
0df3ca52 986 // Calculate position of the center-of-gravity around the maximum pixel
987 Double_t xyCOG[2];
988 FindCOG(mlem, xyCOG);
989
990 if (TMath::Min(pixPtr->Size(0),pixPtr->Size(1)) < 0.07 && pixPtr->Size(0) > pixPtr->Size(1)) break;
2b1e4f0e 991 //if (TMath::Min(pixPtr->Size(0),pixPtr->Size(1)) < 0.007 && pixPtr->Size(0) > pixPtr->Size(1)) break;
0df3ca52 992 //if (TMath::Min(pixPtr->Size(0),pixPtr->Size(1)) >= 0.07 || pixPtr->Size(0) < pixPtr->Size(1)) {
993 // Sort pixels according to the charge
994 fPixArray->Sort();
995 /*
996 for (Int_t i=0; i<nPix; i++) {
997 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
998 cout << i+1; pixPtr->Print();
999 }
1000 */
1001 Double_t pixMin = 0.01*((AliMUONPixel*)fPixArray->UncheckedAt(0))->Charge();
1002 pixMin = TMath::Min (pixMin,50.);
1003
1004 // Decrease pixel size and shift pixels to make them centered at
1005 // the maximum one
1006 indx = (pixPtr->Size(0)>pixPtr->Size(1)) ? 0 : 1;
1007 Double_t width = 0, shift[2]={0};
1008 ix = 1;
1009 for (Int_t i=0; i<4; i++) xylim[i] = 999;
1010 Int_t nPix1 = nPix; nPix = 0;
1011 for (Int_t ipix=0; ipix<nPix1; ipix++) {
1012 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(ipix);
1013 if (nPix >= npadOK) { // too many pixels already
1014 fPixArray->RemoveAt(ipix);
1015 delete pixPtr;
1016 continue;
1017 }
1018 if (pixPtr->Charge() < pixMin) { // low charge
1019 fPixArray->RemoveAt(ipix);
1020 delete pixPtr;
1021 continue;
1022 }
1023 for (Int_t i=0; i<2; i++) {
1024 if (!i) {
1025 pixPtr->SetCharge(10);
1026 pixPtr->SetSize(indx, pixPtr->Size(indx)/2);
1027 width = -pixPtr->Size(indx);
1028 pixPtr->Shift(indx, width);
1029 // Shift pixel position
1030 if (ix) {
1031 ix = 0;
1032 for (Int_t j=0; j<2; j++) {
1033 shift[j] = pixPtr->Coord(j) - xyCOG[j];
1034 shift[j] -= ((Int_t)(shift[j]/pixPtr->Size(j)/2))*pixPtr->Size(j)*2;
1035 }
1036 //cout << ipix << " " << i << " " << shift[0] << " " << shift[1] << endl;
1037 } // if (ix)
1038 pixPtr->Shift(0, -shift[0]);
1039 pixPtr->Shift(1, -shift[1]);
1040 } else {
1041 pixPtr = new AliMUONPixel(*pixPtr);
1042 pixPtr->Shift(indx, -2*width);
1043 fPixArray->Add((TObject*)pixPtr);
1044 } // else
1045 //pixPtr->Print();
1046 for (Int_t i=0; i<4; i++)
1047 xylim[i] = TMath::Min (xylim[i], (i%2 ? -1 : 1)*pixPtr->Coord(i/2));
1048 } // for (Int_t i=0; i<2;
1049 nPix += 2;
1050 } // for (Int_t ipix=0;
1051
1052 fPixArray->Compress();
1053 nPix = fPixArray->GetEntriesFast();
1054
1055 // Remove excessive pixels
1056 if (nPix > npadOK) {
1057 for (Int_t ipix=npadOK; ipix<nPix; ipix++) {
1058 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(ipix);
1059 fPixArray->RemoveAt(ipix);
1060 delete pixPtr;
1061 }
1062 } else {
1063 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(0);
1064 // add pixels if the maximum is at the limit of pixel area
1065 // start from Y-direction
1066 Int_t j = 0;
1067 for (Int_t i=3; i>-1; i--) {
1068 if (nPix < npadOK &&
1069 TMath::Abs((i%2 ? -1 : 1)*xylim[i]-xyCOG[i/2]) < pixPtr->Size(i/2)) {
1070 pixPtr = new AliMUONPixel(*pixPtr);
1071 pixPtr->SetCoord(i/2, xyCOG[i/2]+(i%2 ? 2:-2)*pixPtr->Size(i/2));
1072 j = TMath::Even (i/2);
1073 pixPtr->SetCoord(j, xyCOG[j]);
1074 fPixArray->Add((TObject*)pixPtr);
1075 nPix++;
1076 }
1077 }
1078 } // else
1079
1080 fPixArray->Compress();
1081 nPix = fPixArray->GetEntriesFast();
1082 delete [] coef; delete [] probi; coef = 0; probi = 0;
1083 } // while (1)
1084
1085 // remove pixels with low signal or low visibility
1086 // Cuts are empirical !!!
1087 Double_t thresh = TMath::Max (mlem->GetMaximum()/100.,1.);
1088 thresh = TMath::Min (thresh,50.);
1089 Double_t cmax = -1, charge = 0;
1090 for (Int_t i=0; i<nPix; i++) cmax = TMath::Max (cmax,probi[i]);
2b1e4f0e 1091 //cout << thresh << " " << cmax << " " << cmax*0.9 << endl;
0df3ca52 1092 // Mark pixels which should be removed
1093 for (Int_t i=0; i<nPix; i++) {
1094 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
1095 charge = pixPtr->Charge();
1096 if (charge < thresh) pixPtr->SetCharge(-charge);
2b1e4f0e 1097 //else if (cmax > 1.91) {
1098 // if (probi[i] < 1.9) pixPtr->SetCharge(-charge);
1099 //}
1100 //AZ else if (probi[i] < cmax*0.9) pixPtr->SetCharge(-charge);
0627f609 1101 //18-01-06 else if (probi[i] < cmax*0.8) pixPtr->SetCharge(-charge);
2b1e4f0e 1102 //cout << i << " " << pixPtr->Coord(0) << " " << pixPtr->Coord(1) << " " << charge << " " << probi[i] << endl;
0df3ca52 1103 }
1104 // Move charge of removed pixels to their nearest neighbour (to keep total charge the same)
1105 Int_t near = 0;
1106 for (Int_t i=0; i<nPix; i++) {
1107 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
1108 charge = pixPtr->Charge();
1109 if (charge > 0) continue;
1110 near = FindNearest(pixPtr);
1111 pixPtr->SetCharge(0);
2b1e4f0e 1112 probi[i] = 0; // make it "invisible"
0df3ca52 1113 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(near);
2b1e4f0e 1114 pixPtr->SetCharge(pixPtr->Charge() + (-charge));
0df3ca52 1115 }
2b1e4f0e 1116 Mlem(coef,probi,2);
0df3ca52 1117 // Update histogram
1118 for (Int_t i=0; i<nPix; i++) {
1119 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
1120 ix = mlem->GetXaxis()->FindBin(pixPtr->Coord(0));
1121 iy = mlem->GetYaxis()->FindBin(pixPtr->Coord(1));
1122 mlem->SetBinContent(ix, iy, pixPtr->Charge());
1123 }
1af223d7 1124 if (fDraw) fDraw->DrawHist("c2", mlem);
0df3ca52 1125
0df3ca52 1126 // Try to split into clusters
1127 Bool_t ok = kTRUE;
1128 if (mlem->GetSum() < 1) ok = kFALSE;
1129 else Split(mlem, coef);
1130 delete [] coef; delete [] probi; coef = 0; probi = 0;
1131 fPixArray->Delete();
1132 return ok;
1133}
1134
1135//_____________________________________________________________________________
2b1e4f0e 1136void AliMUONClusterFinderAZ::Mlem(Double_t *coef, Double_t *probi, Int_t nIter)
0df3ca52 1137{
d19b6003 1138/// Use MLEM to find pixel charges
0df3ca52 1139
1140 Int_t nPix = fPixArray->GetEntriesFast();
1141 Int_t npad = fnPads[0] + fnPads[1];
1142 Double_t *probi1 = new Double_t [nPix];
2b1e4f0e 1143 Double_t probMax = 0;
0df3ca52 1144 Int_t indx, indx1;
1145 AliMUONPixel *pixPtr;
1146
2b1e4f0e 1147 for (Int_t ipix=0; ipix<nPix; ipix++) if (probi[ipix] > probMax) probMax = probi[ipix];
1148 for (Int_t iter=0; iter<nIter; iter++) {
0df3ca52 1149 // Do iterations
1150 for (Int_t ipix=0; ipix<nPix; ipix++) {
1151 // Correct each pixel
1152 if (probi[ipix] < 0.01) continue; // skip "invisible" pixel
1153 Double_t sum = 0;
2b1e4f0e 1154 //probi1[ipix] = probi[ipix];
1155 probi1[ipix] = probMax;
0df3ca52 1156 for (Int_t j=0; j<npad; j++) {
1157 if (fPadIJ[1][j] < 0) continue;
1158 Double_t sum1 = 0;
1159 indx1 = j*nPix;
1160 indx = indx1 + ipix;
1161 for (Int_t i=0; i<nPix; i++) {
1162 // Caculate expectation
1163 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
1164 sum1 += pixPtr->Charge()*coef[indx1+i];
1165 } // for (Int_t i=0;
0627f609 1166 if (fXyq[2][j] > fgkSaturation-1 && sum1 > fXyq[2][j]) { probi1[ipix] -= coef[indx]; continue; } // correct for pad charge overflows
0df3ca52 1167 //cout << sum1 << " " << fXyq[2][j] << " " << coef[j*nPix+ipix] << endl;
1168 if (coef[indx] > 1.e-6) sum += fXyq[2][j]*coef[indx]/sum1;
1169 } // for (Int_t j=0;
1170 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(ipix);
1171 if (probi1[ipix] > 1.e-6) pixPtr->SetCharge(pixPtr->Charge()*sum/probi1[ipix]);
1172 } // for (Int_t ipix=0;
1173 } // for (Int_t iter=0;
1174 delete [] probi1;
1175 return;
1176}
1177
1178//_____________________________________________________________________________
1179void AliMUONClusterFinderAZ::FindCOG(TH2D *mlem, Double_t *xyc)
1180{
d19b6003 1181/// Calculate position of the center-of-gravity around the maximum pixel
0df3ca52 1182
1183 Int_t ixmax, iymax, ix, nsumx=0, nsumy=0, nsum=0;
1184 Int_t i1 = -9, j1 = -9;
1185 mlem->GetMaximumBin(ixmax,iymax,ix);
1186 Int_t nx = mlem->GetNbinsX();
1187 Int_t ny = mlem->GetNbinsY();
1188 Double_t thresh = mlem->GetMaximum()/10;
1189 Double_t x, y, cont, xq=0, yq=0, qq=0;
1190
1191 for (Int_t i=TMath::Max(1,iymax-1); i<=TMath::Min(ny,iymax+1); i++) {
1192 y = mlem->GetYaxis()->GetBinCenter(i);
1193 for (Int_t j=TMath::Max(1,ixmax-1); j<=TMath::Min(nx,ixmax+1); j++) {
1194 cont = mlem->GetCellContent(j,i);
1195 if (cont < thresh) continue;
1196 if (i != i1) {i1 = i; nsumy++;}
1197 if (j != j1) {j1 = j; nsumx++;}
1198 x = mlem->GetXaxis()->GetBinCenter(j);
1199 xq += x*cont;
1200 yq += y*cont;
1201 qq += cont;
1202 nsum++;
1203 }
1204 }
1205
1206 Double_t cmax = 0;
1207 Int_t i2 = 0, j2 = 0;
1208 x = y = 0;
1209 if (nsumy == 1) {
1210 // one bin in Y - add one more (with the largest signal)
1211 for (Int_t i=TMath::Max(1,iymax-1); i<=TMath::Min(ny,iymax+1); i++) {
1212 if (i == iymax) continue;
1213 for (Int_t j=TMath::Max(1,ixmax-1); j<=TMath::Min(nx,ixmax+1); j++) {
1214 cont = mlem->GetCellContent(j,i);
1215 if (cont > cmax) {
1216 cmax = cont;
1217 x = mlem->GetXaxis()->GetBinCenter(j);
1218 y = mlem->GetYaxis()->GetBinCenter(i);
1219 i2 = i;
1220 j2 = j;
1221 }
1222 }
1223 }
1224 xq += x*cmax;
1225 yq += y*cmax;
1226 qq += cmax;
1227 if (i2 != i1) nsumy++;
1228 if (j2 != j1) nsumx++;
1229 nsum++;
1230 } // if (nsumy == 1)
1231
1232 if (nsumx == 1) {
1233 // one bin in X - add one more (with the largest signal)
1234 cmax = x = y = 0;
1235 for (Int_t j=TMath::Max(1,ixmax-1); j<=TMath::Min(nx,ixmax+1); j++) {
1236 if (j == ixmax) continue;
1237 for (Int_t i=TMath::Max(1,iymax-1); i<=TMath::Min(ny,iymax+1); i++) {
1238 cont = mlem->GetCellContent(j,i);
1239 if (cont > cmax) {
1240 cmax = cont;
1241 x = mlem->GetXaxis()->GetBinCenter(j);
1242 y = mlem->GetYaxis()->GetBinCenter(i);
1243 i2 = i;
1244 j2 = j;
1245 }
1246 }
1247 }
1248 xq += x*cmax;
1249 yq += y*cmax;
1250 qq += cmax;
1251 if (i2 != i1) nsumy++;
1252 if (j2 != j1) nsumx++;
1253 nsum++;
1254 } // if (nsumx == 1)
1255
1256 xyc[0] = xq/qq; xyc[1] = yq/qq;
2b1e4f0e 1257 if (fDebug) cout << xyc[0] << " " << xyc[1] << " " << qq << " " << nsum << " " << nsumx << " " << nsumy << endl;
0df3ca52 1258 return;
1259}
1260
1261//_____________________________________________________________________________
1262Int_t AliMUONClusterFinderAZ::FindNearest(AliMUONPixel *pixPtr0)
1263{
d19b6003 1264/// Find the pixel nearest to the given one
1265/// (algorithm may be not very efficient)
0df3ca52 1266
1267 Int_t nPix = fPixArray->GetEntriesFast(), imin = 0;
1268 Double_t rmin = 99999, dx = 0, dy = 0, r = 0;
1269 Double_t xc = pixPtr0->Coord(0), yc = pixPtr0->Coord(1);
1270 AliMUONPixel *pixPtr;
1271
1272 for (Int_t i=0; i<nPix; i++) {
1273 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
1274 if (pixPtr->Charge() < 0.5) continue;
1275 dx = (xc - pixPtr->Coord(0)) / pixPtr->Size(0);
1276 dy = (yc - pixPtr->Coord(1)) / pixPtr->Size(1);
1277 r = dx *dx + dy * dy;
1278 if (r < rmin) { rmin = r; imin = i; }
1279 }
1280 return imin;
1281}
1282
1283//_____________________________________________________________________________
1284void AliMUONClusterFinderAZ::Split(TH2D *mlem, Double_t *coef)
1285{
d19b6003 1286/// The main steering function to work with clusters of pixels in anode
1287/// plane (find clusters, decouple them from each other, merge them (if
1288/// necessary), pick up coupled pads, call the fitting function)
0df3ca52 1289
1290 Int_t nx = mlem->GetNbinsX();
1291 Int_t ny = mlem->GetNbinsY();
1292 Int_t nPix = fPixArray->GetEntriesFast();
1293
1294 Bool_t *used = new Bool_t[ny*nx];
1295 Double_t cont;
1296 Int_t nclust = 0, indx, indx1;
1297
1298 for (Int_t i=0; i<ny*nx; i++) used[i] = kFALSE;
1299
1300 TObjArray *clusters[200]={0};
1301 TObjArray *pix;
1302
1303 // Find clusters of histogram bins (easier to work in 2-D space)
1304 for (Int_t i=1; i<=ny; i++) {
1305 for (Int_t j=1; j<=nx; j++) {
1306 indx = (i-1)*nx + j - 1;
1307 if (used[indx]) continue;
1308 cont = mlem->GetCellContent(j,i);
1309 if (cont < 0.5) continue;
1310 pix = new TObjArray(20);
1311 used[indx] = 1;
1312 pix->Add(BinToPix(mlem,j,i));
1313 AddBin(mlem, i, j, 0, used, pix); // recursive call
2b1e4f0e 1314 if (nclust >= 200) AliFatal(" Too many clusters !!!");
0df3ca52 1315 clusters[nclust++] = pix;
0df3ca52 1316 } // for (Int_t j=1; j<=nx; j++) {
1317 } // for (Int_t i=1; i<=ny;
2b1e4f0e 1318 if (fDebug) cout << nclust << endl;
0df3ca52 1319 delete [] used; used = 0;
1320
1321 // Compute couplings between clusters and clusters to pads
1322 Int_t npad = fnPads[0] + fnPads[1];
1323
2b1e4f0e 1324 // Write out some information for algorithm development
1325 Int_t cath=0, npadx[2]={0}, npady[2]={0};
1326 Double_t xlow[2]={9999,9999}, xhig[2]={-9999,-9999};
1327 Double_t ylow[2]={9999,9999}, yhig[2]={-9999,-9999};
1328 for (Int_t j=0; j<npad; j++) {
1329 if (fXyq[3][j] < 0) continue; // exclude virtual pads
1330 cath = fPadIJ[0][j];
1331 if (fXyq[0][j] < xlow[cath]-0.001) {
1332 if (fXyq[0][j]+fXyq[3][j] <= xlow[cath] && npadx[cath]) npadx[cath]++;
1333 xlow[cath] = fXyq[0][j];
1334 }
1335 if (fXyq[0][j] > xhig[cath]+0.001) {
1336 if (fXyq[0][j]-fXyq[3][j] >= xhig[cath]) npadx[cath]++;
1337 xhig[cath] = fXyq[0][j];
1338 }
1339 if (fXyq[1][j] < ylow[cath]-0.001) {
1340 if (fXyq[1][j]+fXyq[4][j] <= ylow[cath] && npady[cath]) npady[cath]++;
1341 ylow[cath] = fXyq[1][j];
1342 }
1343 if (fXyq[1][j] > yhig[cath]+0.001) {
1344 if (fXyq[1][j]-fXyq[4][j] >= yhig[cath]) npady[cath]++;
1345 yhig[cath] = fXyq[1][j];
1346 }
1347 }
1348 //if (lun1) fprintf(lun1," %4d %2d %3d %3d %3d %3d \n",gAlice->GetHeader()->GetEvent(),AliMUONClusterInput::Instance()->Chamber(), npadx[0], npadx[1], npady[0], npady[1]);
1349
0df3ca52 1350 // Exclude pads with overflows
1351 for (Int_t j=0; j<npad; j++) {
0627f609 1352 if (fXyq[2][j] > fgkSaturation-1) fPadIJ[1][j] = -5;
0df3ca52 1353 else fPadIJ[1][j] = 0;
1354 }
1355
1356 // Compute couplings of clusters to pads
c1aed84f 1357 TMatrixD *aijclupad = new TMatrixD(nclust,npad);
1358 *aijclupad = 0;
0df3ca52 1359 Int_t npxclu;
1360 for (Int_t iclust=0; iclust<nclust; iclust++) {
1361 pix = clusters[iclust];
1362 npxclu = pix->GetEntriesFast();
1363 for (Int_t i=0; i<npxclu; i++) {
1364 indx = fPixArray->IndexOf(pix->UncheckedAt(i));
1365 for (Int_t j=0; j<npad; j++) {
2b1e4f0e 1366 if (fPadIJ[1][j] < 0 && fPadIJ[1][j] != -5) continue;
343146bf 1367 if (coef[j*nPix+indx] < fgkCouplMin) continue;
c1aed84f 1368 (*aijclupad)(iclust,j) += coef[j*nPix+indx];
0df3ca52 1369 }
1370 }
1371 }
1372 // Compute couplings between clusters
c1aed84f 1373 TMatrixD *aijcluclu = new TMatrixD(nclust,nclust);
1374 *aijcluclu = 0;
0df3ca52 1375 for (Int_t iclust=0; iclust<nclust; iclust++) {
1376 for (Int_t j=0; j<npad; j++) {
1377 // Exclude overflows
1378 if (fPadIJ[1][j] < 0) continue;
343146bf 1379 if ((*aijclupad)(iclust,j) < fgkCouplMin) continue;
0df3ca52 1380 for (Int_t iclust1=iclust+1; iclust1<nclust; iclust1++) {
343146bf 1381 if ((*aijclupad)(iclust1,j) < fgkCouplMin) continue;
c1aed84f 1382 (*aijcluclu)(iclust,iclust1) +=
1383 TMath::Sqrt ((*aijclupad)(iclust,j)*(*aijclupad)(iclust1,j));
0df3ca52 1384 }
1385 }
1386 }
1387 for (Int_t iclust=0; iclust<nclust; iclust++) {
1388 for (Int_t iclust1=iclust+1; iclust1<nclust; iclust1++) {
c1aed84f 1389 (*aijcluclu)(iclust1,iclust) = (*aijcluclu)(iclust,iclust1);
0df3ca52 1390 }
1391 }
1392
2b1e4f0e 1393 if (fDebug && nclust > 1) aijcluclu->Print();
0df3ca52 1394
1395 // Find groups of coupled clusters
1396 used = new Bool_t[nclust];
1397 for (Int_t i=0; i<nclust; i++) used[i] = kFALSE;
1398 Int_t *clustNumb = new Int_t[nclust];
1399 Int_t nCoupled, nForFit, minGroup[3], clustFit[3], nfit = 0;
1400 Double_t parOk[8];
1401
1402 for (Int_t igroup=0; igroup<nclust; igroup++) {
1403 if (used[igroup]) continue;
1404 used[igroup] = kTRUE;
1405 clustNumb[0] = igroup;
1406 nCoupled = 1;
1407 // Find group of coupled clusters
c1aed84f 1408 AddCluster(igroup, nclust, aijcluclu, used, clustNumb, nCoupled); // recursive
2b1e4f0e 1409 if (fDebug) {
1410 cout << " nCoupled: " << nCoupled << endl;
1411 for (Int_t i=0; i<nCoupled; i++) cout << clustNumb[i] << " "; cout << endl;
1412 }
1413 fnCoupled = nCoupled;
0df3ca52 1414
1415 while (nCoupled > 0) {
1416
1417 if (nCoupled < 4) {
1418 nForFit = nCoupled;
1419 for (Int_t i=0; i<nCoupled; i++) clustFit[i] = clustNumb[i];
1420 } else {
1421 // Too many coupled clusters to fit - try to decouple them
1422 // Find the lowest coupling of 1, 2, min(3,nLinks/2) pixels with
1423 // all the others in the group
1424 for (Int_t j=0; j<3; j++) minGroup[j] = -1;
c1aed84f 1425 Double_t coupl = MinGroupCoupl(nCoupled, clustNumb, aijcluclu, minGroup);
0df3ca52 1426
1427 // Flag clusters for fit
1428 nForFit = 0;
1429 while (minGroup[nForFit] >= 0 && nForFit < 3) {
2b1e4f0e 1430 if (fDebug) cout << clustNumb[minGroup[nForFit]] << " ";
0df3ca52 1431 clustFit[nForFit] = clustNumb[minGroup[nForFit]];
1432 clustNumb[minGroup[nForFit]] -= 999;
1433 nForFit++;
1434 }
2b1e4f0e 1435 if (fDebug) cout << nForFit << " " << coupl << endl;
0df3ca52 1436 } // else
1437
1438 // Select pads for fit.
c1aed84f 1439 if (SelectPad(nCoupled, nForFit, clustNumb, clustFit, aijclupad) < 3 && nCoupled > 1) {
0df3ca52 1440 // Deselect pads
2b1e4f0e 1441 for (Int_t j=0; j<npad; j++) {
1442 if (TMath::Abs(fPadIJ[1][j]) == 1) fPadIJ[1][j] = 0;
1443 if (TMath::Abs(fPadIJ[1][j]) == -9) fPadIJ[1][j] = -5;
1444 }
0df3ca52 1445 // Merge the failed cluster candidates (with too few pads to fit) with
1446 // the one with the strongest coupling
c1aed84f 1447 Merge(nForFit, nCoupled, clustNumb, clustFit, clusters, aijcluclu, aijclupad);
0df3ca52 1448 } else {
1449 // Do the fit
0627f609 1450 nfit = Fit(0, nForFit, clustFit, clusters, parOk);
0df3ca52 1451 }
1452
1453 // Subtract the fitted charges from pads with strong coupling and/or
1454 // return pads for further use
1455 UpdatePads(nfit, parOk);
1456
1457 // Mark used pads
2b1e4f0e 1458 for (Int_t j=0; j<npad; j++) {
1459 if (fPadIJ[1][j] == 1) fPadIJ[1][j] = -1;
1460 if (fPadIJ[1][j] == -9) fPadIJ[1][j] = -5;
1461 }
0df3ca52 1462
1463 // Sort the clusters (move to the right the used ones)
1464 Int_t beg = 0, end = nCoupled - 1;
1465 while (beg < end) {
1466 if (clustNumb[beg] >= 0) { beg++; continue; }
1467 for (Int_t j=end; j>beg; j--) {
1468 if (clustNumb[j] < 0) continue;
1469 end = j - 1;
1470 indx = clustNumb[beg];
1471 clustNumb[beg] = clustNumb[j];
1472 clustNumb[j] = indx;
1473 break;
1474 }
1475 beg++;
1476 }
1477
1478 nCoupled -= nForFit;
1479 if (nCoupled > 3) {
1480 // Remove couplings of used clusters
1481 for (Int_t iclust=nCoupled; iclust<nCoupled+nForFit; iclust++) {
1482 indx = clustNumb[iclust] + 999;
1483 for (Int_t iclust1=0; iclust1<nCoupled; iclust1++) {
1484 indx1 = clustNumb[iclust1];
c1aed84f 1485 (*aijcluclu)(indx,indx1) = (*aijcluclu)(indx1,indx) = 0;
0df3ca52 1486 }
1487 }
1488
1489 // Update the remaining clusters couplings (exclude couplings from
1490 // the used pads)
1491 for (Int_t j=0; j<npad; j++) {
1492 if (fPadIJ[1][j] != -1) continue;
1493 for (Int_t iclust=0; iclust<nCoupled; iclust++) {
1494 indx = clustNumb[iclust];
343146bf 1495 if ((*aijclupad)(indx,j) < fgkCouplMin) continue;
0df3ca52 1496 for (Int_t iclust1=iclust+1; iclust1<nCoupled; iclust1++) {
1497 indx1 = clustNumb[iclust1];
343146bf 1498 if ((*aijclupad)(indx1,j) < fgkCouplMin) continue;
0df3ca52 1499 // Check this
c1aed84f 1500 (*aijcluclu)(indx,indx1) -=
1501 TMath::Sqrt ((*aijclupad)(indx,j)*(*aijclupad)(indx1,j));
1502 (*aijcluclu)(indx1,indx) = (*aijcluclu)(indx,indx1);
0df3ca52 1503 }
1504 }
2b1e4f0e 1505 fPadIJ[1][j] = -8;
0df3ca52 1506 } // for (Int_t j=0; j<npad;
1507 } // if (nCoupled > 3)
1508 } // while (nCoupled > 0)
1509 } // for (Int_t igroup=0; igroup<nclust;
1510
c1aed84f 1511 aijcluclu->Delete(); aijclupad->Delete();
0df3ca52 1512 for (Int_t iclust=0; iclust<nclust; iclust++) {
1513 pix = clusters[iclust];
1514 pix->Clear();
1515 delete pix; pix = 0;
1516 }
1517 delete [] clustNumb; clustNumb = 0; delete [] used; used = 0;
1518}
1519
1520//_____________________________________________________________________________
1521void AliMUONClusterFinderAZ::AddBin(TH2D *mlem, Int_t ic, Int_t jc, Int_t mode, Bool_t *used, TObjArray *pix)
1522{
d19b6003 1523/// Add a bin to the cluster
0df3ca52 1524
1525 Int_t nx = mlem->GetNbinsX();
1526 Int_t ny = mlem->GetNbinsY();
1527 Double_t cont1, cont = mlem->GetCellContent(jc,ic);
1528 AliMUONPixel *pixPtr = 0;
1529
1530 for (Int_t i=TMath::Max(ic-1,1); i<=TMath::Min(ic+1,ny); i++) {
1531 for (Int_t j=TMath::Max(jc-1,1); j<=TMath::Min(jc+1,nx); j++) {
1532 if (i != ic && j != jc) continue;
1533 if (used[(i-1)*nx+j-1]) continue;
1534 cont1 = mlem->GetCellContent(j,i);
1535 if (mode && cont1 > cont) continue;
1536 used[(i-1)*nx+j-1] = kTRUE;
1537 if (cont1 < 0.5) continue;
1538 if (pix) pix->Add(BinToPix(mlem,j,i));
1539 else {
1540 pixPtr = new AliMUONPixel (mlem->GetXaxis()->GetBinCenter(j),
1541 mlem->GetYaxis()->GetBinCenter(i), 0, 0, cont1);
1542 fPixArray->Add((TObject*)pixPtr);
1543 }
1544 AddBin(mlem, i, j, mode, used, pix); // recursive call
1545 }
1546 }
1547}
1548
1549//_____________________________________________________________________________
1550TObject* AliMUONClusterFinderAZ::BinToPix(TH2D *mlem, Int_t jc, Int_t ic)
1551{
d19b6003 1552/// Translate histogram bin to pixel
0df3ca52 1553
1554 Double_t yc = mlem->GetYaxis()->GetBinCenter(ic);
1555 Double_t xc = mlem->GetXaxis()->GetBinCenter(jc);
1556
1557 Int_t nPix = fPixArray->GetEntriesFast();
0627f609 1558 AliMUONPixel *pixPtr = NULL;
0df3ca52 1559
1560 // Compare pixel and bin positions
1561 for (Int_t i=0; i<nPix; i++) {
1562 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
1563 if (pixPtr->Charge() < 0.5) continue;
1564 if (TMath::Abs(pixPtr->Coord(0)-xc)<1.e-4 && TMath::Abs(pixPtr->Coord(1)-yc)<1.e-4) return (TObject*) pixPtr;
1565 }
94eb555e 1566 AliError(Form(" Something wrong ??? %f %f ", xc, yc));
0df3ca52 1567 return NULL;
1568}
1569
1570//_____________________________________________________________________________
c1aed84f 1571void AliMUONClusterFinderAZ::AddCluster(Int_t ic, Int_t nclust, TMatrixD *aijcluclu, Bool_t *used, Int_t *clustNumb, Int_t &nCoupled)
0df3ca52 1572{
d19b6003 1573/// Add a cluster to the group of coupled clusters
0df3ca52 1574
1575 for (Int_t i=0; i<nclust; i++) {
1576 if (used[i]) continue;
343146bf 1577 if ((*aijcluclu)(i,ic) < fgkCouplMin) continue;
0df3ca52 1578 used[i] = kTRUE;
1579 clustNumb[nCoupled++] = i;
c1aed84f 1580 AddCluster(i, nclust, aijcluclu, used, clustNumb, nCoupled);
0df3ca52 1581 }
1582}
1583
1584//_____________________________________________________________________________
c1aed84f 1585Double_t AliMUONClusterFinderAZ::MinGroupCoupl(Int_t nCoupled, Int_t *clustNumb, TMatrixD *aijcluclu, Int_t *minGroup)
0df3ca52 1586{
d19b6003 1587/// Find group of clusters with minimum coupling to all the others
0df3ca52 1588
1589 Int_t i123max = TMath::Min(3,nCoupled/2);
1590 Int_t indx, indx1, indx2, indx3, nTot = 0;
1591 Double_t *coupl1 = 0, *coupl2 = 0, *coupl3 = 0;
1592
1593 for (Int_t i123=1; i123<=i123max; i123++) {
1594
1595 if (i123 == 1) {
1596 coupl1 = new Double_t [nCoupled];
1597 for (Int_t i=0; i<nCoupled; i++) coupl1[i] = 0;
1598 }
1599 else if (i123 == 2) {
1600 nTot = nCoupled*nCoupled;
1601 coupl2 = new Double_t [nTot];
1602 for (Int_t i=0; i<nTot; i++) coupl2[i] = 9999;
1603 } else {
1604 nTot = nTot*nCoupled;
1605 coupl3 = new Double_t [nTot];
1606 for (Int_t i=0; i<nTot; i++) coupl3[i] = 9999;
1607 } // else
1608
1609 for (Int_t i=0; i<nCoupled; i++) {
1610 indx1 = clustNumb[i];
1611 for (Int_t j=i+1; j<nCoupled; j++) {
1612 indx2 = clustNumb[j];
1613 if (i123 == 1) {
c1aed84f 1614 coupl1[i] += (*aijcluclu)(indx1,indx2);
1615 coupl1[j] += (*aijcluclu)(indx1,indx2);
0df3ca52 1616 }
1617 else if (i123 == 2) {
1618 indx = i*nCoupled + j;
1619 coupl2[indx] = coupl1[i] + coupl1[j];
c1aed84f 1620 coupl2[indx] -= 2 * ((*aijcluclu)(indx1,indx2));
0df3ca52 1621 } else {
1622 for (Int_t k=j+1; k<nCoupled; k++) {
1623 indx3 = clustNumb[k];
1624 indx = i*nCoupled*nCoupled + j*nCoupled + k;
1625 coupl3[indx] = coupl2[i*nCoupled+j] + coupl1[k];
c1aed84f 1626 coupl3[indx] -= 2 * ((*aijcluclu)(indx1,indx3)+(*aijcluclu)(indx2,indx3));
0df3ca52 1627 }
1628 } // else
1629 } // for (Int_t j=i+1;
1630 } // for (Int_t i=0;
1631 } // for (Int_t i123=1;
1632
1633 // Find minimum coupling
1634 Double_t couplMin = 9999;
1635 Int_t locMin = 0;
1636
1637 for (Int_t i123=1; i123<=i123max; i123++) {
1638 if (i123 == 1) {
1639 locMin = TMath::LocMin(nCoupled, coupl1);
1640 couplMin = coupl1[locMin];
1641 minGroup[0] = locMin;
1642 delete [] coupl1; coupl1 = 0;
1643 }
1644 else if (i123 == 2) {
1645 locMin = TMath::LocMin(nCoupled*nCoupled, coupl2);
1646 if (coupl2[locMin] < couplMin) {
1647 couplMin = coupl2[locMin];
1648 minGroup[0] = locMin/nCoupled;
1649 minGroup[1] = locMin%nCoupled;
1650 }
1651 delete [] coupl2; coupl2 = 0;
1652 } else {
1653 locMin = TMath::LocMin(nTot, coupl3);
1654 if (coupl3[locMin] < couplMin) {
1655 couplMin = coupl3[locMin];
1656 minGroup[0] = locMin/nCoupled/nCoupled;
1657 minGroup[1] = locMin%(nCoupled*nCoupled)/nCoupled;
1658 minGroup[2] = locMin%nCoupled;
1659 }
1660 delete [] coupl3; coupl3 = 0;
1661 } // else
1662 } // for (Int_t i123=1;
1663 return couplMin;
1664}
1665
1666//_____________________________________________________________________________
c1aed84f 1667Int_t AliMUONClusterFinderAZ::SelectPad(Int_t nCoupled, Int_t nForFit, Int_t *clustNumb, Int_t *clustFit, TMatrixD *aijclupad)
0df3ca52 1668{
d19b6003 1669/// Select pads for fit. If too many coupled clusters, find pads giving
1670/// the strongest coupling with the rest of clusters and exclude them from the fit.
0df3ca52 1671
1672 Int_t npad = fnPads[0] + fnPads[1];
c1aed84f 1673 Double_t *padpix = 0;
0df3ca52 1674
1675 if (nCoupled > 3) {
c1aed84f 1676 padpix = new Double_t[npad];
1677 for (Int_t i=0; i<npad; i++) padpix[i] = 0;
0df3ca52 1678 }
1679
1680 Int_t nOK = 0, indx, indx1;
1681 for (Int_t iclust=0; iclust<nForFit; iclust++) {
1682 indx = clustFit[iclust];
1683 for (Int_t j=0; j<npad; j++) {
343146bf 1684 if ((*aijclupad)(indx,j) < fgkCouplMin) continue;
2b1e4f0e 1685 if (fPadIJ[1][j] == -5) fPadIJ[1][j] = -9; // flag overflow
1686 if (fPadIJ[1][j] < 0) continue; // exclude overflows and used pads
1687 if (!fPadIJ[1][j]) { fPadIJ[1][j] = 1; nOK++; } // pad to be used in fit
0df3ca52 1688 if (nCoupled > 3) {
1689 // Check other clusters
1690 for (Int_t iclust1=0; iclust1<nCoupled; iclust1++) {
1691 indx1 = clustNumb[iclust1];
1692 if (indx1 < 0) continue;
343146bf 1693 if ((*aijclupad)(indx1,j) < fgkCouplMin) continue;
c1aed84f 1694 padpix[j] += (*aijclupad)(indx1,j);
0df3ca52 1695 }
1696 } // if (nCoupled > 3)
1697 } // for (Int_t j=0; j<npad;
1698 } // for (Int_t iclust=0; iclust<nForFit
1699 if (nCoupled < 4) return nOK;
1700
1701 Double_t aaa = 0;
1702 for (Int_t j=0; j<npad; j++) {
343146bf 1703 if (padpix[j] < fgkCouplMin) continue;
2b1e4f0e 1704 if (fDebug) cout << j << " " << padpix[j] << " " << fXyq[0][j] << " " << fXyq[1][j] << endl;
c1aed84f 1705 aaa += padpix[j];
0df3ca52 1706 fPadIJ[1][j] = -1; // exclude pads with strong coupling to the other clusters
1707 nOK--;
1708 }
c1aed84f 1709 delete [] padpix; padpix = 0;
0df3ca52 1710 return nOK;
1711}
1712
1713//_____________________________________________________________________________
c1aed84f 1714void AliMUONClusterFinderAZ::Merge(Int_t nForFit, Int_t nCoupled, Int_t *clustNumb, Int_t *clustFit, TObjArray **clusters, TMatrixD *aijcluclu, TMatrixD *aijclupad)
0df3ca52 1715{
d19b6003 1716/// Merge the group of clusters with the one having the strongest coupling with them
0df3ca52 1717
1718 Int_t indx, indx1, npxclu, npxclu1, imax=0;
1719 TObjArray *pix, *pix1;
1720 Double_t couplMax;
1721
1722 for (Int_t icl=0; icl<nForFit; icl++) {
1723 indx = clustFit[icl];
1724 pix = clusters[indx];
1725 npxclu = pix->GetEntriesFast();
1726 couplMax = -1;
1727 for (Int_t icl1=0; icl1<nCoupled; icl1++) {
1728 indx1 = clustNumb[icl1];
1729 if (indx1 < 0) continue;
c1aed84f 1730 if ((*aijcluclu)(indx,indx1) > couplMax) {
1731 couplMax = (*aijcluclu)(indx,indx1);
0df3ca52 1732 imax = indx1;
1733 }
1734 } // for (Int_t icl1=0;
343146bf 1735 /*if (couplMax < fgkCouplMin) {
0df3ca52 1736 cout << " Oops " << couplMax << endl;
c1aed84f 1737 aijcluclu->Print();
0df3ca52 1738 cout << icl << " " << indx << " " << npxclu << " " << nLinks << endl;
1739 ::exit(0);
1740 }*/
1741 // Add to it
1742 pix1 = clusters[imax];
1743 npxclu1 = pix1->GetEntriesFast();
1744 // Add pixels
1745 for (Int_t i=0; i<npxclu; i++) { pix1->Add(pix->UncheckedAt(i)); pix->RemoveAt(i); }
2b1e4f0e 1746 if (fDebug) cout << " New number of pixels: " << npxclu1 << " " << pix1->GetEntriesFast() << endl;
0df3ca52 1747 //Add cluster-to-cluster couplings
c1aed84f 1748 //aijcluclu->Print();
0df3ca52 1749 for (Int_t icl1=0; icl1<nCoupled; icl1++) {
1750 indx1 = clustNumb[icl1];
1751 if (indx1 < 0 || indx1 == imax) continue;
c1aed84f 1752 (*aijcluclu)(indx1,imax) += (*aijcluclu)(indx,indx1);
1753 (*aijcluclu)(imax,indx1) = (*aijcluclu)(indx1,imax);
0df3ca52 1754 }
c1aed84f 1755 (*aijcluclu)(indx,imax) = (*aijcluclu)(imax,indx) = 0;
1756 //aijcluclu->Print();
0df3ca52 1757 //Add cluster-to-pad couplings
1758 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2b1e4f0e 1759 if (fPadIJ[1][j] < 0 && fPadIJ[1][j] != -5) continue; // exclude used pads
c1aed84f 1760 (*aijclupad)(imax,j) += (*aijclupad)(indx,j);
1761 (*aijclupad)(indx,j) = 0;
0df3ca52 1762 }
1763 } // for (Int_t icl=0; icl<nForFit;
1764}
1765
1766//_____________________________________________________________________________
0627f609 1767Int_t AliMUONClusterFinderAZ::Fit(Int_t iSimple, Int_t nfit, Int_t *clustFit, TObjArray **clusters, Double_t *parOk)
0df3ca52 1768{
d19b6003 1769/// Find selected clusters to selected pad charges
0df3ca52 1770
1771 TH2D *mlem = (TH2D*) gROOT->FindObject("mlem");
0df3ca52 1772 Double_t xmin = mlem->GetXaxis()->GetXmin() - mlem->GetXaxis()->GetBinWidth(1);
1773 Double_t xmax = mlem->GetXaxis()->GetXmax() + mlem->GetXaxis()->GetBinWidth(1);
1774 Double_t ymin = mlem->GetYaxis()->GetXmin() - mlem->GetYaxis()->GetBinWidth(1);
1775 Double_t ymax = mlem->GetYaxis()->GetXmax() + mlem->GetYaxis()->GetBinWidth(1);
2b1e4f0e 1776 Double_t step[3]={0.01,0.002,0.02}, xPad = 0, yPad = 99999;
0df3ca52 1777
2b1e4f0e 1778 // Number of pads to use and number of virtual pads
0627f609 1779 Int_t npads = 0, nVirtual = 0, nfit0 = nfit;
2b1e4f0e 1780 for (Int_t i=0; i<fnPads[0]+fnPads[1]; i++) {
2b1e4f0e 1781 if (fXyq[3][i] < 0) nVirtual++;
1782 if (fPadIJ[1][i] != 1) continue;
0627f609 1783 if (fXyq[3][i] > 0) {
1784 npads++;
1785 if (yPad > 9999) {
1786 xPad = fXyq[0][i];
1787 yPad = fXyq[1][i];
1788 } else {
1789 if (fXyq[4][i] < fXyq[3][i]) yPad = fXyq[1][i];
1790 else xPad = fXyq[0][i];
1791 }
1792 }
2b1e4f0e 1793 }
1794 if (fDebug) {
1795 for (Int_t i=0; i<nfit; i++) {cout << i+1 << " " << clustFit[i] << " ";}
1796 cout << nfit << endl;
1797 cout << " Number of pads to fit: " << npads << endl;
1798 }
0df3ca52 1799 fNpar = 0;
1800 fQtot = 0;
1801 if (npads < 2) return 0;
0627f609 1802
1803 Int_t digit = 0;
2b1e4f0e 1804 AliMUONDigit *mdig = 0;
1805 Int_t tracks[3] = {-1, -1, -1};
1806 for (Int_t cath=0; cath<2; cath++) {
1807 for (Int_t i=0; i<fnPads[0]+fnPads[1]; i++) {
1808 if (fPadIJ[0][i] != cath) continue;
1809 if (fPadIJ[1][i] != 1) continue;
1810 if (fXyq[3][i] < 0) continue; // exclude virtual pads
1811 digit = TMath::Nint (fXyq[5][i]);
1812 if (digit >= 0) mdig = fInput->Digit(cath,digit);
1813 else mdig = fInput->Digit(TMath::Even(cath),-digit-1);
1814 //if (!mdig) mdig = fInput->Digit(TMath::Even(cath),digit);
1815 if (!mdig) continue; // protection for cluster display
1816 if (mdig->Hit() >= 0) {
1817 if (tracks[0] < 0) {
1818 tracks[0] = mdig->Hit();
1819 tracks[1] = mdig->Track(0);
1820 } else if (mdig->Track(0) < tracks[1]) {
1821 tracks[0] = mdig->Hit();
1822 tracks[1] = mdig->Track(0);
1823 }
1824 }
2b1e4f0e 1825 if (mdig->Track(1) >= 0 && mdig->Track(1) != tracks[1]) {
1826 if (tracks[2] < 0) tracks[2] = mdig->Track(1);
1827 else tracks[2] = TMath::Min (tracks[2], mdig->Track(1));
1828 }
1829 //if (!mdig) break;
1830 //cout << mdig->Hit() << " " << mdig->Track(0) << " " << mdig->Track(1) <<endl;
1831 } // for (Int_t i=0;
1832 } // for (Int_t cath=0;
1833 //cout << tracks[0] << " " << tracks[1] << " " << tracks[2] <<endl;
1834
1835 // Get number of pads in X and Y
1836 Int_t nInX = 0, nInY;
1837 PadsInXandY(nInX, nInY);
1af223d7 1838 //cout << " nInX and Y: " << nInX << " " << nInY << endl;
2b1e4f0e 1839
0627f609 1840 Int_t nfitMax = 3;
1841 nfitMax = TMath::Min (nfitMax, (npads + 1) / 3);
1842 if (nfitMax > 1) {
1843 if (nInX < 3 && nInY < 3 || nInX == 3 && nInY < 3 || nInX < 3 && nInY == 3) nfitMax = 1; // not enough pads in each direction
1844 }
1845 if (nfit > nfitMax) nfit = nfitMax;
1846
0df3ca52 1847 // Take cluster maxima as fitting seeds
2b1e4f0e 1848 TObjArray *pix;
0df3ca52 1849 AliMUONPixel *pixPtr;
2b1e4f0e 1850 Int_t npxclu;
1851 Double_t cont, cmax = 0, xseed = 0, yseed = 0, errOk[8], qq = 0;
f29ba3e1 1852 Double_t xyseed[3][2], qseed[3], xyCand[3][2] = {{0},{0}}, sigCand[3][2] = {{0},{0}};
2b1e4f0e 1853
0627f609 1854 for (Int_t ifit=1; ifit<=nfit0; ifit++) {
0df3ca52 1855 cmax = 0;
1856 pix = clusters[clustFit[ifit-1]];
1857 npxclu = pix->GetEntriesFast();
2b1e4f0e 1858 //qq = 0;
0df3ca52 1859 for (Int_t clu=0; clu<npxclu; clu++) {
1860 pixPtr = (AliMUONPixel*) pix->UncheckedAt(clu);
1861 cont = pixPtr->Charge();
1862 fQtot += cont;
1863 if (cont > cmax) {
1864 cmax = cont;
1865 xseed = pixPtr->Coord(0);
1866 yseed = pixPtr->Coord(1);
1867 }
2b1e4f0e 1868 qq += cont;
1869 /*
f29ba3e1 1870 xyCand[ifit-1][0] += pixPtr->Coord(0) * cont;
1871 xyCand[ifit-1][1] += pixPtr->Coord(1) * cont;
1872 sigCand[ifit-1][0] += pixPtr->Coord(0) * pixPtr->Coord(0) * cont;
1873 sigCand[ifit-1][1] += pixPtr->Coord(1) * pixPtr->Coord(1) * cont;
2b1e4f0e 1874 */
f29ba3e1 1875 xyCand[0][0] += pixPtr->Coord(0) * cont;
1876 xyCand[0][1] += pixPtr->Coord(1) * cont;
1877 sigCand[0][0] += pixPtr->Coord(0) * pixPtr->Coord(0) * cont;
1878 sigCand[0][1] += pixPtr->Coord(1) * pixPtr->Coord(1) * cont;
0df3ca52 1879 }
1880 xyseed[ifit-1][0] = xseed;
1881 xyseed[ifit-1][1] = yseed;
1882 qseed[ifit-1] = cmax;
2b1e4f0e 1883 /*
f29ba3e1 1884 xyCand[ifit-1][0] /= qq; // <x>
1885 xyCand[ifit-1][1] /= qq; // <y>
1886 sigCand[ifit-1][0] = sigCand[ifit-1][0]/qq - xyCand[ifit-1][0]*xyCand[ifit-1][0]; // <x^2> - <x>^2
1887 sigCand[ifit-1][0] = sigCand[ifit-1][0] > 0 ? TMath::Sqrt (sigCand[ifit-1][0]) : 0;
1888 sigCand[ifit-1][1] = sigCand[ifit-1][1]/qq - xyCand[ifit-1][1]*xyCand[ifit-1][1]; // <y^2> - <y>^2
1889 sigCand[ifit-1][1] = sigCand[ifit-1][1] > 0 ? TMath::Sqrt (sigCand[ifit-1][1]) : 0;
1890 cout << xyCand[ifit-1][0] << " " << xyCand[ifit-1][1] << " " << sigCand[ifit-1][0] << " " << sigCand[ifit-1][1] << endl;
2b1e4f0e 1891 */
0df3ca52 1892 } // for (Int_t ifit=1;
1893
f29ba3e1 1894 xyCand[0][0] /= qq; // <x>
1895 xyCand[0][1] /= qq; // <y>
1896 sigCand[0][0] = sigCand[0][0]/qq - xyCand[0][0]*xyCand[0][0]; // <x^2> - <x>^2
1897 sigCand[0][0] = sigCand[0][0] > 0 ? TMath::Sqrt (sigCand[0][0]) : 0;
1898 sigCand[0][1] = sigCand[0][1]/qq - xyCand[0][1]*xyCand[0][1]; // <y^2> - <y>^2
1899 sigCand[0][1] = sigCand[0][1] > 0 ? TMath::Sqrt (sigCand[0][1]) : 0;
1900 if (fDebug) cout << xyCand[0][0] << " " << xyCand[0][1] << " " << sigCand[0][0] << " " << sigCand[0][1] << endl;
2b1e4f0e 1901
0627f609 1902 Int_t nDof, maxSeed[3], nMax = 0;
0df3ca52 1903 Double_t fmin, chi2o = 9999, chi2n;
1904
0627f609 1905 TMath::Sort(nfit0, qseed, maxSeed, kTRUE); // in decreasing order
1906 /*
1907 Int_t itmp[100], localMax[100];
1908 Double_t maxVal[100];
1909 if (!iSimple && nfit < nfitMax) {
1910 // Try to split pixel cluster according to local maxima
1911 Int_t nfit1 = nfit;
1912 for (Int_t iclus = 0; iclus < nfit1; iclus++) {
1913 nMax = FindLocalMaxima (clusters[clustFit[maxSeed[iclus]]], localMax, maxVal);
1914 TH2D *hist = (TH2D*) gROOT->FindObject("anode1");
1915 if (nMax == 1) { hist->Delete(); continue; }
1916 // Add extra fitting seeds from local maxima
1917 Int_t ixseed = hist->GetXaxis()->FindBin(xyseed[maxSeed[iclus]][0]);
1918 Int_t iyseed = hist->GetYaxis()->FindBin(xyseed[maxSeed[iclus]][1]);
1919 Int_t nx = hist->GetNbinsX();
1920 TMath::Sort(nMax, maxVal, itmp, kTRUE); // in decreasing order
1921 for (Int_t j = 0; j < nMax; j++) {
1922 Int_t iyc = localMax[itmp[j]] / nx + 1;
1923 Int_t ixc = localMax[itmp[j]] % nx + 1;
1924 if (ixc == ixseed && iyc == iyseed) continue; // local max already taken for seeding
1925 xyseed[nfit][0] = hist->GetXaxis()->GetBinCenter(ixc);
1926 xyseed[nfit][1] = hist->GetYaxis()->GetBinCenter(iyc);
1927 qseed[nfit] = maxVal[itmp[j]];
1928 maxSeed[nfit] = nfit++;
1929 if (nfit >= nfitMax) break;
1930 }
1931 hist->Delete();
1932 if (nfit >= nfitMax) break;
1933 } // for (Int_t iclus = 0;
1934 //nfit0 = nfit;
1935 //TMath::Sort(nfit0, qseed, maxSeed, kTRUE); // in decreasing order
1936 } //if (!iSimple && nfit < nfitMax)
1937 */
0df3ca52 1938
a952ddec 1939 Double_t *gin = 0, func0, func1, param[8], step0[8];
1940 Double_t param0[2][8]={{0},{0}}, deriv[2][8]={{0},{0}};
0df3ca52 1941 Double_t shift[8], stepMax, derMax, parmin[8], parmax[8], func2[2], shift0;
1942 Double_t delta[8], scMax, dder[8], estim, shiftSave = 0;
1943 Int_t min, max, nCall = 0, memory[8] = {0}, nLoop, idMax = 0, iestMax = 0, nFail;
2b1e4f0e 1944 Double_t rad, dist[3] = {0};
0df3ca52 1945
0627f609 1946 // Try to fit with one-track hypothesis, then 2-track. If chi2/dof is
1947 // lower, try 3-track (if number of pads is sufficient).
0df3ca52 1948 for (Int_t iseed=0; iseed<nfit; iseed++) {
1949
2b1e4f0e 1950 if (iseed) { for (Int_t j=0; j<fNpar; j++) param[j] = parOk[j]; } // for bounded params
0df3ca52 1951 for (Int_t j=0; j<3; j++) step0[fNpar+j] = shift[fNpar+j] = step[j];
0627f609 1952 if (nfit == 1) param[fNpar] = xyCand[0][0]; // take COG
1953 else param[fNpar] = xyseed[maxSeed[iseed]][0];
0df3ca52 1954 parmin[fNpar] = xmin;
1955 parmax[fNpar++] = xmax;
0627f609 1956 if (nfit == 1) param[fNpar] = xyCand[0][1]; // take COG
1957 else param[fNpar] = xyseed[maxSeed[iseed]][1];
0df3ca52 1958 parmin[fNpar] = ymin;
1959 parmax[fNpar++] = ymax;
1960 if (fNpar > 2) {
1961 param[fNpar] = fNpar == 4 ? 0.5 : 0.3;
1962 parmin[fNpar] = 0;
1963 parmax[fNpar++] = 1;
1964 }
5a051e34 1965 if (iseed) { for (Int_t j=0; j<fNpar; j++) param0[1][j] = 0; }
0df3ca52 1966
1967 // Try new algorithm
1968 min = nLoop = 1; stepMax = func2[1] = derMax = 999999; nFail = 0;
1969
1970 while (1) {
1971 max = !min;
30178c30 1972 Fcn1(fNpar, gin, func0, param, 1); nCall++;
0df3ca52 1973 //cout << " Func: " << func0 << endl;
1974
1975 func2[max] = func0;
1976 for (Int_t j=0; j<fNpar; j++) {
1977 param0[max][j] = param[j];
1978 delta[j] = step0[j];
1979 param[j] += delta[j] / 10;
1980 if (j > 0) param[j-1] -= delta[j-1] / 10;
30178c30 1981 Fcn1(fNpar, gin, func1, param, 1); nCall++;
0df3ca52 1982 deriv[max][j] = (func1 - func0) / delta[j] * 10; // first derivative
1983 //cout << j << " " << deriv[max][j] << endl;
1984 dder[j] = param0[0][j] != param0[1][j] ? (deriv[0][j] - deriv[1][j]) /
a952ddec 1985 (param0[0][j] - param0[1][j]) : 0; // second derivative
0df3ca52 1986 }
1987 param[fNpar-1] -= delta[fNpar-1] / 10;
2b1e4f0e 1988 if (nCall > 2000) break;
0df3ca52 1989
1990 min = func2[0] < func2[1] ? 0 : 1;
1991 nFail = min == max ? 0 : nFail + 1;
1992
1993 stepMax = derMax = estim = 0;
1994 for (Int_t j=0; j<fNpar; j++) {
1995 // Estimated distance to minimum
1996 shift0 = shift[j];
1997 if (nLoop == 1) shift[j] = TMath::Sign (step0[j], -deriv[max][j]); // first step
1998 else if (TMath::Abs(deriv[0][j]) < 1.e-3 && TMath::Abs(deriv[1][j]) < 1.e-3) shift[j] = 0;
1999 else if (deriv[min][j]*deriv[!min][j] > 0 && TMath::Abs(deriv[min][j]) > TMath::Abs(deriv[!min][j])
2b1e4f0e 2000 //|| TMath::Abs(deriv[0][j]-deriv[1][j]) < 1.e-3) {
2001 || TMath::Abs(deriv[0][j]-deriv[1][j]) < 1.e-3 || TMath::Abs(dder[j]) < 1.e-6) {
0df3ca52 2002 shift[j] = -TMath::Sign (shift[j], (func2[0]-func2[1]) * (param0[0][j]-param0[1][j]));
2003 if (min == max) {
2004 if (memory[j] > 1) { shift[j] *= 2; } //cout << " Memory " << memory[j] << " " << shift[j] << endl; }
2005 memory[j]++;
2006 }
2007 } else {
2b1e4f0e 2008 shift[j] = dder[j] != 0 ? -deriv[min][j] / dder[j] : 0;
0df3ca52 2009 memory[j] = 0;
2010 }
2011 if (TMath::Abs(shift[j])/step0[j] > estim) {
2012 estim = TMath::Abs(shift[j])/step0[j];
2013 iestMax = j;
2014 }
2015
2016 // Too big step
2017 if (TMath::Abs(shift[j])/step0[j] > 10) shift[j] = TMath::Sign(10.,shift[j]) * step0[j]; //
2018
2019 // Failed to improve minimum
2020 if (min != max) {
2021 memory[j] = 0;
2022 param[j] = param0[min][j];
2023 if (TMath::Abs(shift[j]+shift0) > 0.1*step0[j]) shift[j] = (shift[j] + shift0) / 2;
2024 else shift[j] /= -2;
2025 }
2026
2027 // Too big step
2028 if (TMath::Abs(shift[j]*deriv[min][j]) > func2[min])
2029 shift[j] = TMath::Sign (func2[min]/deriv[min][j], shift[j]);
2030
2031 // Introduce step relaxation factor
2032 if (memory[j] < 3) {
2033 scMax = 1 + 4 / TMath::Max(nLoop/2.,1.);
2034 if (TMath::Abs(shift0) > 0 && TMath::Abs(shift[j]/shift0) > scMax)
2035 shift[j] = TMath::Sign (shift0*scMax, shift[j]);
2036 }
2037 param[j] += shift[j];
2b1e4f0e 2038 //AZ Check parameter limits 27-12-2004
2039 if (param[j] < parmin[j]) {
2040 shift[j] = parmin[j] - param[j];
2041 param[j] = parmin[j];
2042 } else if (param[j] > parmax[j]) {
2043 shift[j] = parmax[j] - param[j];
2044 param[j] = parmax[j];
2045 }
0df3ca52 2046 //cout << " xxx " << j << " " << shift[j] << " " << param[j] << endl;
2047 stepMax = TMath::Max (stepMax, TMath::Abs(shift[j]/step0[j]));
2048 if (TMath::Abs(deriv[min][j]) > derMax) {
2049 idMax = j;
2050 derMax = TMath::Abs (deriv[min][j]);
2051 }
2052 } // for (Int_t j=0; j<fNpar;
2053 //cout << max << " " << func2[min] << " " << derMax << " " << stepMax << " " << estim << " " << iestMax << " " << nCall << endl;
2b1e4f0e 2054 if (estim < 1 && derMax < 2 || nLoop > 150) break; // minimum was found
0df3ca52 2055
2056 nLoop++;
2057 // Check for small step
2058 if (shift[idMax] == 0) { shift[idMax] = step0[idMax]/10; param[idMax] += shift[idMax]; continue; }
2059 if (!memory[idMax] && derMax > 0.5 && nLoop > 10) {
2060 //cout << " ok " << deriv[min][idMax] << " " << deriv[!min][idMax] << " " << dder[idMax]*shift[idMax] << " " << shift[idMax] << endl;
2061 if (dder[idMax] != 0 && TMath::Abs(deriv[min][idMax]/dder[idMax]/shift[idMax]) > 10) {
2062 if (min == max) dder[idMax] = -dder[idMax];
2063 shift[idMax] = -deriv[min][idMax] / dder[idMax] / 10;
2064 param[idMax] += shift[idMax];
2065 stepMax = TMath::Max (stepMax, TMath::Abs(shift[idMax])/step0[idMax]);
2066 //cout << shift[idMax] << " " << param[idMax] << endl;
2067 if (min == max) shiftSave = shift[idMax];
2068 }
2069 if (nFail > 10) {
2070 param[idMax] -= shift[idMax];
2071 shift[idMax] = 4 * shiftSave * (gRandom->Rndm(0) - 0.5);
2072 param[idMax] += shift[idMax];
2073 //cout << shift[idMax] << endl;
2074 }
2075 }
2076 } // while (1)
2077 fmin = func2[min];
2078
2b1e4f0e 2079 nDof = npads - fNpar + nVirtual;
2080 if (!nDof) nDof++;
2081 chi2n = fmin / nDof;
2082 if (fDebug) cout << " Chi2 " << chi2n << " " << fNpar << endl;
0df3ca52 2083
2084 if (chi2n*1.2+1.e-6 > chi2o ) { fNpar -= 3; break; }
2b1e4f0e 2085
0df3ca52 2086 // Save parameters and errors
2b1e4f0e 2087
0627f609 2088 if (nInX == 1) {
2b1e4f0e 2089 // One pad per direction
2b1e4f0e 2090 for (Int_t i=0; i<fNpar; i++) if (i == 0 || i == 2 || i == 5) param0[min][i] = xPad;
2091 }
0627f609 2092 if (nInY == 1) {
2b1e4f0e 2093 // One pad per direction
2b1e4f0e 2094 for (Int_t i=0; i<fNpar; i++) if (i == 1 || i == 3 || i == 6) param0[min][i] = yPad;
2095 }
2096
2097 /*
2098 if (iseed > 0) {
2099 // Find distance to the nearest neighbour
2100 dist[0] = dist[1] = TMath::Sqrt ((param0[min][0]-param0[min][2])*
2101 (param0[min][0]-param0[min][2])
2102 +(param0[min][1]-param0[min][3])*
2103 (param0[min][1]-param0[min][3]));
2104 if (iseed > 1) {
2105 dist[2] = TMath::Sqrt ((param0[min][0]-param0[min][5])*
2106 (param0[min][0]-param0[min][5])
2107 +(param0[min][1]-param0[min][6])*
2108 (param0[min][1]-param0[min][6]));
2109 rad = TMath::Sqrt ((param0[min][2]-param0[min][5])*
2110 (param0[min][2]-param0[min][5])
2111 +(param0[min][3]-param0[min][6])*
2112 (param0[min][3]-param0[min][6]));
2113 if (dist[2] < dist[0]) dist[0] = dist[2];
2114 if (rad < dist[1]) dist[1] = rad;
2115 if (rad < dist[2]) dist[2] = rad;
2116 }
2117 cout << dist[0] << " " << dist[1] << " " << dist[2] << endl;
2118 if (dist[TMath::LocMin(iseed+1,dist)] < 1.) { fNpar -= 3; break; }
2119 }
2120 */
2121
0df3ca52 2122 for (Int_t i=0; i<fNpar; i++) {
2123 parOk[i] = param0[min][i];
0627f609 2124 //errOk[i] = fmin;
2125 errOk[i] = chi2n;
2b1e4f0e 2126 // Bounded params
2127 parOk[i] = TMath::Max (parOk[i], parmin[i]);
2128 parOk[i] = TMath::Min (parOk[i], parmax[i]);
0df3ca52 2129 }
2130
0df3ca52 2131 chi2o = chi2n;
2132 if (fmin < 0.1) break; // !!!???
2133 } // for (Int_t iseed=0;
2134
2b1e4f0e 2135 if (fDebug) {
2136 for (Int_t i=0; i<fNpar; i++) {
2b1e4f0e 2137 if (i == 4 || i == 7) {
2138 if (i == 7 || i == 4 && fNpar < 7) cout << parOk[i] << endl;
2139 else cout << parOk[i] * (1-parOk[7]) << endl;
2140 continue;
2141 }
2142 cout << parOk[i] << " " << errOk[i] << endl;
2143 }
0df3ca52 2144 }
2145 nfit = (fNpar + 1) / 3;
2b1e4f0e 2146 dist[0] = dist[1] = dist[2] = 0;
2147
2148 if (nfit > 1) {
2149 // Find distance to the nearest neighbour
2150 dist[0] = dist[1] = TMath::Sqrt ((parOk[0]-parOk[2])*
2151 (parOk[0]-parOk[2])
2152 +(parOk[1]-parOk[3])*
2153 (parOk[1]-parOk[3]));
2154 if (nfit > 2) {
2155 dist[2] = TMath::Sqrt ((parOk[0]-parOk[5])*
2156 (parOk[0]-parOk[5])
2157 +(parOk[1]-parOk[6])*
2158 (parOk[1]-parOk[6]));
2159 rad = TMath::Sqrt ((parOk[2]-parOk[5])*
2160 (parOk[2]-parOk[5])
2161 +(parOk[3]-parOk[6])*
2162 (parOk[3]-parOk[6]));
2163 if (dist[2] < dist[0]) dist[0] = dist[2];
2164 if (rad < dist[1]) dist[1] = rad;
2165 if (rad < dist[2]) dist[2] = rad;
2166 }
2167 }
2168
1af223d7 2169 Int_t indx;
2b1e4f0e 2170 fnPads[1] -= nVirtual;
cc87ebcd 2171 if (!fDraw) {
2172 Double_t coef = 0;
0627f609 2173 if (iSimple) fnCoupled = 0;
cc87ebcd 2174 //for (Int_t j=0; j<nfit; j++) {
2175 for (Int_t j=nfit-1; j>=0; j--) {
2176 indx = j<2 ? j*2 : j*2+1;
2177 if (nfit == 1) coef = 1;
2178 else coef = j==nfit-1 ? parOk[indx+2] : 1-coef;
2179 coef = TMath::Max (coef, 0.);
2180 if (nfit == 3 && j < 2) coef = j==1 ? coef*parOk[indx+2] : coef - parOk[7];
2181 coef = TMath::Max (coef, 0.);
0627f609 2182 AddRawCluster (parOk[indx], parOk[indx+1], coef*fQtot, errOk[indx], nfit0+10*nfit+100*nMax+10000*fnCoupled, tracks,
cc87ebcd 2183 //sigCand[maxSeed[j]][0], sigCand[maxSeed[j]][1]);
2184 //sigCand[0][0], sigCand[0][1], dist[j]);
2185 sigCand[0][0], sigCand[0][1], dist[TMath::LocMin(nfit,dist)]);
2186 }
2187 } else fDraw->FillMuon(nfit, parOk, errOk);
0df3ca52 2188 return nfit;
2189}
2190
2191//_____________________________________________________________________________
30178c30 2192void AliMUONClusterFinderAZ::Fcn1(Int_t & /*npar*/, Double_t * /*gin*/, Double_t &f, Double_t *par, Int_t /*iflag*/)
0df3ca52 2193{
d19b6003 2194/// Fit for one track
2195/// AZ for Muinuit AliMUONClusterFinderAZ& c = *(AliMUONClusterFinderAZ::fgClusterFinder);
2196
2b1e4f0e 2197 AliMUONClusterFinderAZ& c = *this; //AZ
0df3ca52 2198
2199 Int_t cath, ix, iy, indx, npads=0;
2b1e4f0e 2200 Double_t charge, delta, coef=0, chi2=0, qTot = 0;
0df3ca52 2201 for (Int_t j=0; j<c.fnPads[0]+c.fnPads[1]; j++) {
2202 if (c.fPadIJ[1][j] != 1) continue;
2203 cath = c.fPadIJ[0][j];
2b1e4f0e 2204 if (c.fXyq[3][j] > 0) npads++; // exclude virtual pads
2205 qTot += c.fXyq[2][j];
0627f609 2206 ix = c.fPadIJ[2][j];
2207 iy = c.fPadIJ[3][j];
2208 c.fSegmentation[cath]->SetPad(ix, iy);
0df3ca52 2209 charge = 0;
2210 for (Int_t i=c.fNpar/3; i>=0; i--) { // sum over tracks
2211 indx = i<2 ? 2*i : 2*i+1;
0627f609 2212 c.fSegmentation[cath]->SetHit(par[indx], par[indx+1], c.fZpad);
0df3ca52 2213 if (c.fNpar == 2) coef = 1;
2214 else coef = i==c.fNpar/3 ? par[indx+2] : 1-coef;
2b1e4f0e 2215 coef = TMath::Max (coef, 0.);
0df3ca52 2216 if (c.fNpar == 8 && i < 2) coef = i==1 ? coef*par[indx+2] : coef - par[7];
2b1e4f0e 2217 coef = TMath::Max (coef, 0.);
0627f609 2218 charge += c.fInput->Mathieson()->IntXY(fInput->DetElemId(), c.fInput->Segmentation2(cath))*coef;
0df3ca52 2219 }
2220 charge *= c.fQtot;
0df3ca52 2221 delta = charge - c.fXyq[2][j];
2b1e4f0e 2222 delta *= delta;
2223 delta /= c.fXyq[2][j];
2224 //if (cath) delta /= 5; // just for test
2225 chi2 += delta;
0df3ca52 2226 } // for (Int_t j=0;
2227 f = chi2;
2b1e4f0e 2228 Double_t qAver = qTot/npads; //(c.fnPads[0]+c.fnPads[1]);
0df3ca52 2229 f = chi2/qAver;
2230}
2231
2232//_____________________________________________________________________________
6aaf81e6 2233void AliMUONClusterFinderAZ::UpdatePads(Int_t /*nfit*/, Double_t *par)
0df3ca52 2234{
d19b6003 2235/// Subtract the fitted charges from pads with strong coupling
0df3ca52 2236
2237 Int_t cath, ix, iy, indx;
2238 Double_t charge, coef=0;
2239 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2240 if (fPadIJ[1][j] != -1) continue;
2241 if (fNpar != 0) {
2242 cath = fPadIJ[0][j];
0627f609 2243 ix = fPadIJ[2][j];
2244 iy = fPadIJ[3][j];
2245 fSegmentation[cath]->SetPad(ix, iy);
0df3ca52 2246 charge = 0;
2247 for (Int_t i=fNpar/3; i>=0; i--) { // sum over tracks
2248 indx = i<2 ? 2*i : 2*i+1;
0627f609 2249 fSegmentation[cath]->SetHit(par[indx], par[indx+1], fZpad);
0df3ca52 2250 if (fNpar == 2) coef = 1;
2251 else coef = i==fNpar/3 ? par[indx+2] : 1-coef;
2b1e4f0e 2252 coef = TMath::Max (coef, 0.);
0df3ca52 2253 if (fNpar == 8 && i < 2) coef = i==1 ? coef*par[indx+2] : coef - par[7];
2b1e4f0e 2254 coef = TMath::Max (coef, 0.);
0627f609 2255 charge += fInput->Mathieson()->IntXY(fInput->DetElemId(),fInput->Segmentation2(cath))*coef;
0df3ca52 2256 }
2257 charge *= fQtot;
2258 fXyq[2][j] -= charge;
2259 } // if (fNpar != 0)
0627f609 2260 if (fXyq[2][j] > fgkZeroSuppression) fPadIJ[1][j] = 0; // return pad for further using
0df3ca52 2261 } // for (Int_t j=0;
2262}
2263
2264//_____________________________________________________________________________
d19b6003 2265Bool_t AliMUONClusterFinderAZ::TestTrack(Int_t /*t*/) const
2266{
2267/// Test if track was user selected
2268
0df3ca52 2269 return kTRUE;
2270 /*
2271 if (fTrack[0]==-1 || fTrack[1]==-1) {
2272 return kTRUE;
2273 } else if (t==fTrack[0] || t==fTrack[1]) {
2274 return kTRUE;
2275 } else {
2276 return kFALSE;
2277 }
2278 */
2279}
2280
2281//_____________________________________________________________________________
2b1e4f0e 2282void AliMUONClusterFinderAZ::AddRawCluster(Double_t x, Double_t y, Double_t qTot, Double_t fmin, Int_t nfit, Int_t *tracks, Double_t /*sigx*/, Double_t /*sigy*/, Double_t /*dist*/)
0df3ca52 2283{
d19b6003 2284/// Add a raw cluster copy to the list
2285
2b1e4f0e 2286 if (qTot <= 0.501) return;
0df3ca52 2287 AliMUONRawCluster cnew;
0df3ca52 2288
2b1e4f0e 2289 Int_t cath, npads[2] = {0}, nover[2] = {0};
2290 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2291 cath = fPadIJ[0][j];
2292 // There was an overflow
2293 if (fPadIJ[1][j] == -9) nover[cath]++;
2294 if (fPadIJ[1][j] != 1 && fPadIJ[1][j] != -9) continue;
2295 cnew.SetMultiplicity(cath,cnew.GetMultiplicity(cath)+1);
2296 if (fXyq[2][j] > cnew.GetPeakSignal(cath)) cnew.SetPeakSignal(cath,TMath::Nint (fXyq[2][j]));
2297 //cnew.SetCharge(cath,cnew.GetCharge(cath) + TMath::Nint (fXyq[2][j]));
2298 cnew.SetContrib(npads[cath],cath,fXyq[2][j]);
5a051e34 2299 cnew.SetIndex(npads[cath],cath,TMath::Nint (fXyq[5][j]));
2300 cnew.SetDetElemId(fInput->DetElemId());
2b1e4f0e 2301 npads[cath]++;
2302 }
2303
2304 cnew.SetClusterType(nover[0] + nover[1] * 100);
2305 for (Int_t j=0; j<3; j++) cnew.SetTrack(j,tracks[j]);
2306
0627f609 2307 Double_t xg, yg, zg;
0df3ca52 2308 for (cath=0; cath<2; cath++) {
0627f609 2309 // Perform local-to-global transformation
2310 fInput->Segmentation2(cath)->GetTransformer()->Local2Global(fInput->DetElemId(), x, y, fZpad, xg, yg, zg);
2311 cnew.SetX(cath, xg);
2312 cnew.SetY(cath, yg);
2313 cnew.SetZ(cath, zg);
2b1e4f0e 2314 cnew.SetCharge(cath, TMath::Nint(qTot));
2315 //cnew.SetPeakSignal(cath,20);
2316 //cnew.SetMultiplicity(cath, 5);
2317 cnew.SetNcluster(cath, nfit);
2318 cnew.SetChi2(cath, fmin); //0.;1
0df3ca52 2319 }
2b1e4f0e 2320 // Evaluate measurement errors
2321 //AZ Errors(&cnew);
2322
2323 cnew.SetGhost(nfit); //cnew.SetX(1,sigx); cnew.SetY(1,sigy); cnew.SetZ(1,dist);
0df3ca52 2324 //cnew.fClusterType=cnew.PhysicsContribution();
0627f609 2325 new((*fRawClusters)[fNRawClusters++]) AliMUONRawCluster(cnew);
2326 if (fDebug) cout << fNRawClusters << " " << fInput->Chamber() << endl;
0df3ca52 2327 //fNPeaks++;
2328}
2329
2330//_____________________________________________________________________________
0627f609 2331Int_t AliMUONClusterFinderAZ::FindLocalMaxima(TObjArray *pixArray, Int_t *localMax, Double_t *maxVal)
0df3ca52 2332{
d19b6003 2333/// Find local maxima in pixel space for large preclusters in order to
2334/// try to split them into smaller pieces (to speed up the MLEM procedure)
2335/// or to find additional fitting seeds if clusters were not completely resolved
0df3ca52 2336
0627f609 2337 TH2D *hist = NULL;
2338 //if (pixArray == fPixArray) hist = (TH2D*) gROOT->FindObject("anode");
2339 //else { hist = (TH2D*) gROOT->FindObject("anode1"); cout << hist << endl; }
2340 //if (hist) hist->Delete();
0df3ca52 2341
cd747ddb 2342 Double_t xylim[4] = {999, 999, 999, 999};
0627f609 2343 Int_t nPix = pixArray->GetEntriesFast();
0df3ca52 2344 AliMUONPixel *pixPtr = 0;
2345 for (Int_t ipix=0; ipix<nPix; ipix++) {
0627f609 2346 pixPtr = (AliMUONPixel*) pixArray->UncheckedAt(ipix);
0df3ca52 2347 for (Int_t i=0; i<4; i++)
2348 xylim[i] = TMath::Min (xylim[i], (i%2 ? -1 : 1)*pixPtr->Coord(i/2));
2349 }
2350 for (Int_t i=0; i<4; i++) xylim[i] -= pixPtr->Size(i/2);
2351
2352 Int_t nx = TMath::Nint ((-xylim[1]-xylim[0])/pixPtr->Size(0)/2);
2353 Int_t ny = TMath::Nint ((-xylim[3]-xylim[2])/pixPtr->Size(1)/2);
0627f609 2354 if (pixArray == fPixArray) hist = new TH2D("anode","anode",nx,xylim[0],-xylim[1],ny,xylim[2],-xylim[3]);
2355 else hist = new TH2D("anode1","anode1",nx,xylim[0],-xylim[1],ny,xylim[2],-xylim[3]);
0df3ca52 2356 for (Int_t ipix=0; ipix<nPix; ipix++) {
0627f609 2357 pixPtr = (AliMUONPixel*) pixArray->UncheckedAt(ipix);
0df3ca52 2358 hist->Fill(pixPtr->Coord(0), pixPtr->Coord(1), pixPtr->Charge());
2359 }
0627f609 2360 if (fDraw && pixArray == fPixArray) fDraw->DrawHist("c2", hist);
0df3ca52 2361
2362 Int_t nMax = 0, indx;
2363 Int_t *isLocalMax = new Int_t[ny*nx];
2364 for (Int_t i=0; i<ny*nx; i++) isLocalMax[i] = 0;
2365
2366 for (Int_t i=1; i<=ny; i++) {
2367 indx = (i-1) * nx;
2368 for (Int_t j=1; j<=nx; j++) {
2369 if (hist->GetCellContent(j,i) < 0.5) continue;
2370 //if (isLocalMax[indx+j-1] < 0) continue;
2371 if (isLocalMax[indx+j-1] != 0) continue;
2372 FlagLocalMax(hist, i, j, isLocalMax);
2373 }
2374 }
2375
2376 for (Int_t i=1; i<=ny; i++) {
2377 indx = (i-1) * nx;
2378 for (Int_t j=1; j<=nx; j++) {
2379 if (isLocalMax[indx+j-1] > 0) {
2380 localMax[nMax] = indx + j - 1;
2381 maxVal[nMax++] = hist->GetCellContent(j,i);
2b1e4f0e 2382 if (nMax > 99) AliFatal(" Too many local maxima !!!");
0df3ca52 2383 }
0df3ca52 2384 }
2385 }
2b1e4f0e 2386 if (fDebug) cout << " Local max: " << nMax << endl;
0df3ca52 2387 delete [] isLocalMax; isLocalMax = 0;
2388 return nMax;
2389}
2390
2391//_____________________________________________________________________________
2392void AliMUONClusterFinderAZ::FlagLocalMax(TH2D *hist, Int_t i, Int_t j, Int_t *isLocalMax)
2393{
d19b6003 2394/// Flag pixels (whether or not local maxima)
0df3ca52 2395
2396 Int_t nx = hist->GetNbinsX();
2397 Int_t ny = hist->GetNbinsY();
2398 Int_t cont = TMath::Nint (hist->GetCellContent(j,i));
0627f609 2399 Int_t cont1 = 0, indx = (i-1)*nx+j-1, indx1 = 0, indx2 = 0;
0df3ca52 2400
2401 for (Int_t i1=i-1; i1<i+2; i1++) {
2402 if (i1 < 1 || i1 > ny) continue;
0627f609 2403 indx1 = (i1 - 1) * nx;
0df3ca52 2404 for (Int_t j1=j-1; j1<j+2; j1++) {
2405 if (j1 < 1 || j1 > nx) continue;
2406 if (i == i1 && j == j1) continue;
0627f609 2407 indx2 = indx1 + j1 - 1;
0df3ca52 2408 cont1 = TMath::Nint (hist->GetCellContent(j1,i1));
0627f609 2409 if (cont < cont1) { isLocalMax[indx] = -1; return; }
2410 else if (cont > cont1) isLocalMax[indx2] = -1;
0df3ca52 2411 else { // the same charge
0627f609 2412 isLocalMax[indx] = 1;
2413 if (isLocalMax[indx2] == 0) {
0df3ca52 2414 FlagLocalMax(hist, i1, j1, isLocalMax);
0627f609 2415 if (isLocalMax[indx2] < 0) { isLocalMax[indx] = -1; return; }
2416 else isLocalMax[indx2] = -1;
0df3ca52 2417 }
2418 }
2419 }
2420 }
0627f609 2421 isLocalMax[indx] = 1; // local maximum
0df3ca52 2422}
2423
2424//_____________________________________________________________________________
2425void AliMUONClusterFinderAZ::FindCluster(Int_t *localMax, Int_t iMax)
2426{
13985652 2427/// Find pixel cluster around local maximum \a iMax and pick up pads
d19b6003 2428/// overlapping with it
0df3ca52 2429
2430 TH2D *hist = (TH2D*) gROOT->FindObject("anode");
2431 Int_t nx = hist->GetNbinsX();
2432 Int_t ny = hist->GetNbinsY();
2433 Int_t ic = localMax[iMax] / nx + 1;
2434 Int_t jc = localMax[iMax] % nx + 1;
2435 Bool_t *used = new Bool_t[ny*nx];
2436 for (Int_t i=0; i<ny*nx; i++) used[i] = kFALSE;
2437
2438 // Drop all pixels from the array - pick up only the ones from the cluster
2439 fPixArray->Delete();
2440
2441 Double_t wx = hist->GetXaxis()->GetBinWidth(1)/2;
2442 Double_t wy = hist->GetYaxis()->GetBinWidth(1)/2;
2443 Double_t yc = hist->GetYaxis()->GetBinCenter(ic);
2444 Double_t xc = hist->GetXaxis()->GetBinCenter(jc);
2445 Double_t cont = hist->GetCellContent(jc,ic);
2446 AliMUONPixel *pixPtr = new AliMUONPixel (xc, yc, wx, wy, cont);
2447 fPixArray->Add((TObject*)pixPtr);
2448 used[(ic-1)*nx+jc-1] = kTRUE;
2449 AddBin(hist, ic, jc, 1, used, (TObjArray*)0); // recursive call
2450
2451 Int_t nPix = fPixArray->GetEntriesFast(), npad = fnPads[0] + fnPads[1];
2452 for (Int_t i=0; i<nPix; i++) {
2453 ((AliMUONPixel*)fPixArray->UncheckedAt(i))->SetSize(0,wx);
2454 ((AliMUONPixel*)fPixArray->UncheckedAt(i))->SetSize(1,wy);
2455 }
2b1e4f0e 2456 if (fDebug) cout << iMax << " " << nPix << endl;
0df3ca52 2457
2458 Float_t xy[4], xy12[4];
2459 // Pick up pads which overlap with found pixels
2460 for (Int_t i=0; i<npad; i++) fPadIJ[1][i] = -1;
2461 for (Int_t i=0; i<nPix; i++) {
2462 pixPtr = (AliMUONPixel*) fPixArray->UncheckedAt(i);
2463 for (Int_t j=0; j<4; j++)
2464 xy[j] = pixPtr->Coord(j/2) + (j%2 ? 1 : -1)*pixPtr->Size(j/2);
2465 for (Int_t j=0; j<npad; j++)
2466 if (Overlap(xy, j, xy12, 0)) fPadIJ[1][j] = 0; // flag for use
2467 }
2468
2469 delete [] used; used = 0;
2470}
30178c30 2471
2b1e4f0e 2472//_____________________________________________________________________________
2473void AliMUONClusterFinderAZ::AddVirtualPad()
2474{
d19b6003 2475/// Add virtual pad (with small charge) to improve fit for some
2476/// clusters (when pad with max charge is at the extreme of the cluster)
2b1e4f0e 2477
2478 // Get number of pads in X and Y-directions
2479 Int_t nInX = -1, nInY;
2480 PadsInXandY(nInX, nInY);
2481 //return;
2482
0627f609 2483 // Add virtual pad only if number of pads per direction == 2
2b1e4f0e 2484 if (nInX != 2 && nInY != 2) return;
2485
2486 // Find pads with max charge
2487 Int_t maxpad[2][2] = {{-1, -1}, {-1, -1}}, cath;
2488 Double_t sigmax[2] = {0}, aamax[2] = {0};
2489 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2490 if (fPadIJ[1][j] != 0) continue;
2491 cath = fPadIJ[0][j];
2492 if (fXyq[2][j] > sigmax[cath]) {
2493 maxpad[cath][1] = maxpad[cath][0];
2494 aamax[cath] = sigmax[cath];
2495 sigmax[cath] = fXyq[2][j];
2496 maxpad[cath][0] = j;
2497 }
2498 }
2499 if (maxpad[0][0] >= 0 && maxpad[0][1] < 0 || maxpad[1][0] >= 0 && maxpad[1][1] < 0) {
2500 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2501 if (fPadIJ[1][j] != 0) continue;
2502 cath = fPadIJ[0][j];
2503 if (j == maxpad[cath][0] || j == maxpad[cath][1]) continue;
2504 if (fXyq[2][j] > aamax[cath]) {
2505 aamax[cath] = fXyq[2][j];
2506 maxpad[cath][1] = j;
2507 }
2508 }
2509 }
2510 // Check for mirrors (side X on cathode 0)
2511 Bool_t mirror = kFALSE;
0627f609 2512 if (maxpad[0][0] >= 0 && maxpad[1][0] >= 0) {
2b1e4f0e 2513 mirror = fXyq[3][maxpad[0][0]] < fXyq[4][maxpad[0][0]];
0627f609 2514 if (!mirror && TMath::Abs(fXyq[3][maxpad[0][0]]-fXyq[3][maxpad[1][0]]) < 0.001) {
2515 // Special case when pads on both cathodes have the same size
2516 Int_t yud[2] = {0};
2517 for (Int_t j = 0; j < fnPads[0]+fnPads[1]; j++) {
2518 cath = fPadIJ[0][j];
2519 if (j == maxpad[cath][0]) continue;
2520 if (fPadIJ[2][j] != fPadIJ[2][maxpad[cath][0]]) continue;
2521 if (fPadIJ[3][j] + 1 == fPadIJ[3][maxpad[cath][0]] ||
2522 fPadIJ[3][j] - 1 == fPadIJ[3][maxpad[cath][0]]) yud[cath]++;
2523 }
2524 if (!yud[0]) mirror = kTRUE; // take the other cathode
2525 } // if (!mirror &&...
2526 } // if (maxpad[0][0] >= 0 && maxpad[1][0] >= 0)
2b1e4f0e 2527
2528 // Find neughbours of pads with max charges
2529 Int_t nn, xList[10], yList[10], ix0, iy0, ix, iy, neighb;
2530 for (cath=0; cath<2; cath++) {
2531 if (!cath && maxpad[0][0] < 0) continue; // one-sided cluster - cathode 1
2532 if (cath && maxpad[1][0] < 0) break; // one-sided cluster - cathode 0
2533 if (maxpad[1][0] >= 0) {
2534 if (!mirror) {
2535 if (!cath && nInY != 2) continue;
2b1e4f0e 2536 if (cath && nInX != 2 && (maxpad[0][0] >= 0 || nInY != 2)) continue;
2537 } else {
2538 if (!cath && nInX != 2) continue;
2539 if (cath && nInY != 2 && (maxpad[0][0] >= 0 || nInX != 2)) continue;
2540 }
2541 }
2542
1af223d7 2543 Int_t iAddX = 0, iAddY = 0, ix1 = 0, iy1 = 0, iPad = 0;
2b1e4f0e 2544 if (maxpad[0][0] < 0) iPad = 1;
2545
2b1e4f0e 2546 for (iPad=0; iPad<2; iPad++) {
94eb555e 2547 if (maxpad[cath][iPad] < 0) continue;
2b1e4f0e 2548 if (iPad && !iAddX && !iAddY) break;
2549 if (iPad && fXyq[2][maxpad[cath][1]] / sigmax[cath] < 0.5) break;
2550
2551 Int_t neighbx = 0, neighby = 0;
0627f609 2552 ix0 = fPadIJ[2][maxpad[cath][iPad]];
2553 iy0 = fPadIJ[3][maxpad[cath][iPad]];
2554 fSegmentation[cath]->Neighbours(ix0, iy0, &nn, xList, yList);
2555 Float_t zpad;
2b1e4f0e 2556 for (Int_t j=0; j<nn; j++) {
0627f609 2557 if (TMath::Abs(xList[j]-ix0) == 1 || xList[j]*ix0 == -1) neighbx++;
2558 if (TMath::Abs(yList[j]-iy0) == 1 || yList[j]*iy0 == -1) neighby++;
2b1e4f0e 2559 }
2560 if (!mirror) {
2561 if (cath) neighb = neighbx;
2562 else neighb = neighby;
2563 if (maxpad[0][0] < 0) neighb += neighby;
2564 else if (maxpad[1][0] < 0) neighb += neighbx;
2565 } else {
2566 if (!cath) neighb = neighbx;
2567 else neighb = neighby;
2568 if (maxpad[0][0] < 0) neighb += neighbx;
2569 else if (maxpad[1][0] < 0) neighb += neighby;
2570 }
2571
2572 for (Int_t j=0; j<fnPads[0]+fnPads[1]; j++) {
2573 if (fPadIJ[0][j] != cath) continue;
0627f609 2574 ix = fPadIJ[2][j];
2575 iy = fPadIJ[3][j];
2b1e4f0e 2576 if (iy == iy0 && ix == ix0) continue;
2577 for (Int_t k=0; k<nn; k++) {
2578 if (xList[k] != ix || yList[k] != iy) continue;
2579 if (!mirror) {
2580 if ((!cath || maxpad[0][0] < 0) &&
1af223d7 2581 (TMath::Abs(iy-iy0) == 1 || iy*iy0 == -1)) {
0627f609 2582 if (!iPad && TMath::Abs(ix-ix0) == 1 || ix*ix0 == -1) ix1 = xList[k]; //19-12-05
2b1e4f0e 2583 xList[k] = yList[k] = 0;
2584 neighb--;
2585 break;
2586 }
2587 if ((cath || maxpad[1][0] < 0) &&
1af223d7 2588 (TMath::Abs(ix-ix0) == 1 || ix*ix0 == -1)) {
0627f609 2589 if (!iPad) ix1 = xList[k]; //19-12-05
2b1e4f0e 2590 xList[k] = yList[k] = 0;
2591 neighb--;
2592 }
2593 } else {
2594 if ((!cath || maxpad[0][0] < 0) &&
1af223d7 2595 (TMath::Abs(ix-ix0) == 1 || ix*ix0 == -1)) {
0627f609 2596 if (!iPad) ix1 = xList[k]; //19-12-05
2b1e4f0e 2597 xList[k] = yList[k] = 0;
2598 neighb--;
2599 break;
2600 }
2601 if ((cath || maxpad[1][0] < 0) &&
1af223d7 2602 (TMath::Abs(iy-iy0) == 1 || iy*iy0 == -1)) {
2b1e4f0e 2603 xList[k] = yList[k] = 0;
2604 neighb--;
2605 }
2606 }
2607 break;
2608 } // for (Int_t k=0; k<nn;
2609 if (!neighb) break;
2610 } // for (Int_t j=0; j<fnPads[0]+fnPads[1];
2611 if (!neighb) continue;
2612
2613 // Add virtual pad
2614 Int_t npads, isec;
2615 isec = 0;
2616 for (Int_t j=0; j<nn; j++) {
2617 if (xList[j] == 0 && yList[j] == 0) continue;
2618 npads = fnPads[0] + fnPads[1];
2619 fPadIJ[0][npads] = cath;
2620 fPadIJ[1][npads] = 0;
2621 ix = xList[j];
2622 iy = yList[j];
1af223d7 2623 if (TMath::Abs(ix-ix0) == 1 || ix*ix0 == -1) {
2b1e4f0e 2624 if (iy != iy0) continue; // new segmentation - check
2625 if (nInX != 2) continue; // new
2626 if (!mirror) {
2627 if (!cath && maxpad[1][0] >= 0) continue;
2b1e4f0e 2628 } else {
2629 if (cath && maxpad[0][0] >= 0) continue;
2b1e4f0e 2630 }
2631 if (iPad && !iAddX) continue;
0627f609 2632 fSegmentation[cath]->GetPadC(ix, iy, fXyq[0][npads], fXyq[1][npads], zpad);
1af223d7 2633 if (fXyq[0][npads] > 1.e+5) continue; // temporary fix
0627f609 2634 if (ix == ix1) continue; //19-12-05
2b1e4f0e 2635 if (ix1 == ix0) continue;
2b1e4f0e 2636 if (maxpad[1][0] < 0 || mirror && maxpad[0][0] >= 0) {
2637 if (!iPad) fXyq[2][npads] = TMath::Min (sigmax[0]/100, 5.);
2638 else fXyq[2][npads] = TMath::Min (aamax[0]/100, 5.);
2639 }
2640 else {
2641 if (!iPad) fXyq[2][npads] = TMath::Min (sigmax[1]/100, 5.);
2642 else fXyq[2][npads] = TMath::Min (aamax[1]/100, 5.);
2643 }
2644 fXyq[2][npads] = TMath::Max (fXyq[2][npads], (float)1);
2b1e4f0e 2645 fXyq[3][npads] = -2; // flag
0627f609 2646 fPadIJ[2][npads] = ix;
2647 fPadIJ[3][npads] = iy;
2b1e4f0e 2648 fnPads[1]++;
2649 iAddX = npads;
0627f609 2650 if (fDebug) printf(" ***** Add virtual pad in X ***** %f %f %f %3d %3d \n", fXyq[2][npads],
e8fb921b 2651 fXyq[0][npads], fXyq[1][npads], ix, iy);
2b1e4f0e 2652 ix1 = ix0;
2653 continue;
2654 }
2655 if (nInY != 2) continue;
2656 if (!mirror && cath && maxpad[0][0] >= 0) continue;
2657 if (mirror && !cath && maxpad[1][0] >= 0) continue;
2658 if (TMath::Abs(iy-iy0) == 1 || TMath::Abs(iy*iy0) == 1) {
2659 if (ix != ix0) continue; // new segmentation - check
2660 if (iPad && !iAddY) continue;
0627f609 2661 fSegmentation[cath]->GetPadC(ix, iy, fXyq[0][npads], fXyq[1][npads], zpad);
2b1e4f0e 2662 if (iy1 == iy0) continue;
2663 //if (iPad && iy1 == iy0) continue;
2b1e4f0e 2664 if (maxpad[0][0] < 0 || mirror && maxpad[1][0] >= 0) {
0627f609 2665 if (!iPad) fXyq[2][npads] = TMath::Min (sigmax[1]/15, fgkZeroSuppression);
2666 else fXyq[2][npads] = TMath::Min (aamax[1]/15, fgkZeroSuppression);
2b1e4f0e 2667 }
2668 else {
0627f609 2669 if (!iPad) fXyq[2][npads] = TMath::Min (sigmax[0]/15, fgkZeroSuppression);
2670 else fXyq[2][npads] = TMath::Min (aamax[0]/15, fgkZeroSuppression);
2b1e4f0e 2671 }
2672 fXyq[2][npads] = TMath::Max (fXyq[2][npads], (float)1);
2b1e4f0e 2673 fXyq[3][npads] = -2; // flag
0627f609 2674 fPadIJ[2][npads] = ix;
2675 fPadIJ[3][npads] = iy;
2b1e4f0e 2676 fnPads[1]++;
2677 iAddY = npads;
0627f609 2678 if (fDebug) printf(" ***** Add virtual pad in Y ***** %f %f %f %3d %3d \n", fXyq[2][npads],
e8fb921b 2679 fXyq[0][npads], fXyq[1][npads], ix, iy);
2b1e4f0e 2680 iy1 = iy0;
2681 }
2682 } // for (Int_t j=0; j<nn;
2683 } // for (Int_t iPad=0;
2684 } // for (cath=0; cath<2;
2685 return;
2686}
2687
2688//_____________________________________________________________________________
2689void AliMUONClusterFinderAZ::PadsInXandY(Int_t &nInX, Int_t &nInY)
2690{
d19b6003 2691/// Find number of pads in X and Y-directions (excluding virtual ones and
2692/// overflows)
2b1e4f0e 2693
2694 static Int_t nXsaved = 0, nYsaved = 0;
2695 nXsaved = nYsaved = 0;
2696 //if (nInX >= 0) {nInX = nXsaved; nInY = nYsaved; return; }
5a051e34 2697 Float_t *xPad0 = NULL, *yPad0 = NULL, *xPad1 = NULL, *yPad1 = NULL;
1af223d7 2698 Float_t wMinX[2] = {99, 99}, wMinY[2] = {99, 99};
5a051e34 2699 Int_t *nPad0 = NULL, *nPad1 = NULL;
2700 Int_t nPads = fnPads[0] + fnPads[1];
2701 if (fnPads[0]) {
2702 xPad0 = new Float_t[nPads];
2703 yPad0 = new Float_t[nPads];
2704 nPad0 = new Int_t[nPads];
2705 }
2706 if (fnPads[1]) {
2707 xPad1 = new Float_t[nPads];
2708 yPad1 = new Float_t[nPads];
2709 nPad1 = new Int_t[nPads];
2710 }
2711 Int_t n0 = 0, n1 = 0, cath, npadx[2] = {1, 1}, npady[2] = {1, 1};
2712 for (Int_t j = 0; j < nPads; j++) {
2b1e4f0e 2713 if (nInX < 0 && fPadIJ[1][j] != 0) continue; // before fit
2714 else if (nInX == 0 && fPadIJ[1][j] != 1) continue; // fit - exclude overflows
2715 else if (nInX > 0 && fPadIJ[1][j] != 1 && fPadIJ[1][j] != -9) continue; // exclude non-marked
0627f609 2716 if (nInX <= 0 && fXyq[2][j] > fgkSaturation-1) continue; // skip overflows
2b1e4f0e 2717 cath = fPadIJ[0][j];
1af223d7 2718 if (fXyq[3][j] > 0) { // exclude virtual pads
2719 wMinX[cath] = TMath::Min (wMinX[cath], fXyq[3][j]);
2720 wMinY[cath] = TMath::Min (wMinY[cath], fXyq[4][j]);
0627f609 2721 //20-12-05 }
2722 if (cath) { xPad1[n1] = fXyq[0][j]; yPad1[n1++] = fXyq[1][j]; }
2723 else { xPad0[n0] = fXyq[0][j]; yPad0[n0++] = fXyq[1][j]; }
1af223d7 2724 }
2b1e4f0e 2725 }
5a051e34 2726
2727 // Sort
2728 if (n0) {
2729 TMath::Sort (n0, xPad0, nPad0); // in X
2730 for (Int_t i = 1; i < n0; i++)
2731 if (xPad0[nPad0[i]] - xPad0[nPad0[i-1]] < -0.01) npadx[0]++;
2732 TMath::Sort (n0, yPad0, nPad0); // in Y
2733 for (Int_t i = 1; i < n0; i++)
2734 if (yPad0[nPad0[i]] - yPad0[nPad0[i-1]] < -0.01) npady[0]++;
2735 }
2736
2737 if (n1) {
2738 TMath::Sort (n1, xPad1, nPad1); // in X
2739 for (Int_t i = 1; i < n1; i++)
2740 if (xPad1[nPad1[i]] - xPad1[nPad1[i-1]] < -0.01) npadx[1]++;
2741 TMath::Sort (n1, yPad1, nPad1); // in Y
2742 for (Int_t i = 1; i < n1; i++)
2743 if (yPad1[nPad1[i]] - yPad1[nPad1[i-1]] < -0.01) npady[1]++;
2744 }
2745 if (fnPads[0]) { delete [] xPad0; delete [] yPad0; delete [] nPad0; }
2746 if (fnPads[1]) { delete [] xPad1; delete [] yPad1; delete [] nPad1; }
cc87ebcd 2747 if (TMath::Abs (wMinY[0] - wMinY[1]) < 1.e-3) nInY = TMath::Max (npady[0], npady[1]);
2748 else nInY = wMinY[0] < wMinY[1] ? npady[0] : npady[1];
2749 if (TMath::Abs (wMinX[0] - wMinX[1]) < 1.e-3) nInX = TMath::Max (npadx[0], npadx[1]);
2750 else nInX = wMinX[0] < wMinX[1] ? npadx[0] : npadx[1];
2b1e4f0e 2751}
2752
2753//_____________________________________________________________________________
2754void AliMUONClusterFinderAZ::Simple()
2755{
d19b6003 2756/// Process simple cluster (small number of pads) without EM-procedure
2b1e4f0e 2757
ff7af159 2758 Int_t nForFit = 1, clustFit[1] = {0}, nfit;
2b1e4f0e 2759 Double_t parOk[3] = {0.};
2760 TObjArray *clusters[1];
ff7af159 2761 clusters[0] = fPixArray;
5a051e34 2762 for (Int_t i = 0; i < fnPads[0]+fnPads[1]; i++) {
0627f609 2763 if (fXyq[2][i] > fgkSaturation-1) fPadIJ[1][i] = -9;
5a051e34 2764 else fPadIJ[1][i] = 1;
2765 }
0627f609 2766 nfit = Fit(1, nForFit, clustFit, clusters, parOk);
2b1e4f0e 2767}
2768
2769//_____________________________________________________________________________
2770void AliMUONClusterFinderAZ::Errors(AliMUONRawCluster *clus)
2771{
d19b6003 2772/// Correct reconstructed coordinates for some clusters and evaluate errors
2b1e4f0e 2773
2774 Double_t qTot = clus->GetCharge(0), fmin = clus->GetChi2(0);
2775 Double_t xreco = clus->GetX(0), yreco = clus->GetY(0), zreco = clus->GetZ(0);
2776 Double_t sigmax[2] = {0};
2777
2778 Int_t nInX = 1, nInY, maxdig[2] ={-1, -1}, digit, cath1, isec;
2779 PadsInXandY(nInX, nInY);
2780
2781 // Find pad with maximum signal
2782 for (Int_t cath = 0; cath < 2; cath++) {
2783 for (Int_t j = 0; j < clus->GetMultiplicity(cath); j++) {
2784 cath1 = cath;
2785 digit = clus->GetIndex(j, cath);
2786 if (digit < 0) { cath1 = TMath::Even(cath); digit = -digit - 1; } // from the other cathode
2787
2788 if (clus->GetContrib(j,cath) > sigmax[cath1]) {
2789 sigmax[cath1] = clus->GetContrib(j,cath);
2790 maxdig[cath1] = digit;
2791 }
2792 }
2793 }
2794
2795 // Size of pad with maximum signal and reco coordinate distance from the pad center
2796 AliMUONDigit *mdig = 0;
2797 Double_t wx[2], wy[2], dxc[2], dyc[2];
2798 Float_t xpad, ypad, zpad;
2799 Int_t ix, iy;
2800 for (Int_t cath = 0; cath < 2; cath++) {
2801 if (maxdig[cath] < 0) continue;
2802 mdig = fInput->Digit(cath,maxdig[cath]);
0627f609 2803 isec = fSegmentation[cath]->Sector(mdig->PadX(), mdig->PadY());
2804 wx[cath] = fSegmentation[cath]->Dpx(isec);
2805 wy[cath] = fSegmentation[cath]->Dpy(isec);
2806 fSegmentation[cath]->GetPadI(xreco, yreco, zreco, ix, iy);
2807 isec = fSegmentation[cath]->Sector(ix, iy);
2b1e4f0e 2808 if (isec > 0) {
0627f609 2809 fSegmentation[cath]->GetPadC(ix, iy, xpad, ypad, zpad);
2b1e4f0e 2810 dxc[cath] = xreco - xpad;
2811 dyc[cath] = yreco - ypad;
2812 }
2813 }
2814
2815 // Check if pad with max charge at the edge (number of neughbours)
2816 Int_t nn, xList[10], yList[10], neighbx[2][2] = {{0,0}, {0,0}}, neighby[2][2]= {{0,0}, {0,0}};
2817 for (Int_t cath = 0; cath < 2; cath++) {
2818 if (maxdig[cath] < 0) continue;
2819 mdig = fInput->Digit(cath,maxdig[cath]);
0627f609 2820 fSegmentation[cath]->Neighbours(mdig->PadX(), mdig->PadY(), &nn, xList, yList);
2821 isec = fSegmentation[cath]->Sector(mdig->PadX(), mdig->PadY());
2822 /*??
f29ba3e1 2823 Float_t sprX = fResponse->SigmaIntegration() * fResponse->ChargeSpreadX();
2824 Float_t sprY = fResponse->SigmaIntegration() * fResponse->ChargeSpreadY();
2825 //fSegmentation[cath]->FirstPad(fInput->DetElemId(),muons[ihit][1], muons[ihit][2], muons[ihit][3], sprX, sprY);
0627f609 2826 //fSegmentation[cath]->FirstPad(fInput->DetElemId(),xreco, yreco, zreco, sprX, sprY);
2827 fSegmentation[cath]->FirstPad(xreco, yreco, zreco, sprX, sprY);
2b1e4f0e 2828 Int_t border = 0;
0627f609 2829 //if (fSegmentation[cath]->Sector(fInput->DetElemId(),fSegmentation[cath]->Ix(),fSegmentation[cath]->Iy()) <= 0) {
2830 if (fSegmentation[cath]->Sector(fSegmentation[cath]->Ix(), fSegmentation[cath]->Iy()) <= 0) {
2831 //fSegmentation[cath]->NextPad(fInput->DetElemId());
2832 fSegmentation[cath]->NextPad();
2b1e4f0e 2833 border = 1;
2834 }
0627f609 2835 */
2b1e4f0e 2836 for (Int_t j=0; j<nn; j++) {
0627f609 2837 //if (border && yList[j] < fSegmentation[cath]->Iy()) continue;
2838 fSegmentation[cath]->GetPadC(xList[j], yList[j], xpad, ypad, zpad);
2b1e4f0e 2839 //cout << ch << " " << xList[j] << " " << yList[j] << " " << border << " " << x << " " << y << " " << xpad << " " << ypad << endl;
2840 if (TMath::Abs(xpad) < 1 && TMath::Abs(ypad) < 1) continue;
2841 if (xList[j] == mdig->PadX()-1 || mdig->PadX() == 1 &&
2842 xList[j] == -1) neighbx[cath][0] = 1;
2843 else if (xList[j] == mdig->PadX()+1 || mdig->PadX() == -1 &&
2844 xList[j] == 1) neighbx[cath][1] = 1;
2845 if (yList[j] == mdig->PadY()-1 || mdig->PadY() == 1 &&
2846 yList[j] == -1) neighby[cath][0] = 1;
2847 else if (yList[j] == mdig->PadY()+1 || mdig->PadY() == -1 &&
2848 yList[j] == 1) neighby[cath][1] = 1;
2849 } // for (Int_t j=0; j<nn;
2850 if (neighbx[cath][0] && neighbx[cath][1]) neighbx[cath][0] = 0;
2851 else if (neighbx[cath][1]) neighbx[cath][0] = -1;
2852 else neighbx[cath][0] = 1;
2853 if (neighby[cath][0] && neighby[cath][1]) neighby[cath][0] = 0;
2854 else if (neighby[cath][1]) neighby[cath][0] = -1;
2855 else neighby[cath][0] = 1;
2856 }
2857
2858 Int_t iOver = clus->GetClusterType();
2859 // One-sided cluster
2860 if (!clus->GetMultiplicity(0)) {
2861 neighby[0][0] = neighby[1][0];
2862 wy[0] = wy[1];
2863 if (iOver < 99) iOver += 100 * iOver;
2864 dyc[0] = dyc[1];
2865 } else if (!clus->GetMultiplicity(1)) {
2866 neighbx[1][0] = neighbx[0][0];
2867 wx[1] = wx[0];
2868 if (iOver < 99) iOver += 100 * iOver;
2869 dxc[1] = dxc[0];
2870 }
2871
2872 // Apply corrections and evaluate errors
2873 Double_t errY, errX;
2874 Errors(nInY, nInX, neighby[0][0],neighbx[1][0], fmin, wy[0]*10, wx[1]*10, iOver,
2875 dyc[0], dxc[1], qTot, yreco, xreco, errY, errX);
2876 errY = TMath::Max (errY, 0.01);
2877 //errY = 0.01;
2878 //errX = TMath::Max (errX, 0.144);
2879 clus->SetX(0, xreco); clus->SetY(0, yreco);
1af223d7 2880 clus->SetErrX(errX); clus->SetErrY(errY);
2b1e4f0e 2881}
2882
2883//_____________________________________________________________________________
2884void AliMUONClusterFinderAZ::Errors(Int_t ny, Int_t nx, Int_t iby, Int_t ibx, Double_t fmin,
2885 Double_t wy, Double_t wx, Int_t iover,
2886 Double_t dyc, Double_t /*dxc*/, Double_t qtot,
2887 Double_t &yrec, Double_t &xrec, Double_t &erry, Double_t &errx)
2888{
d19b6003 2889/// Correct reconstructed coordinates for some clusters and evaluate errors
2b1e4f0e 2890
2891 erry = 0.01;
2892 errx = 0.144;
2893 Int_t iovery = iover % 100;
2894 Double_t corr = 0;
2895
2896/* ---> Ny = 1 */
2897 if (ny == 1) {
2898 if (iby != 0) {
2899 // edge effect
2900 yrec += iby * (0.1823+0.2008)/2;
2901 erry = 0.04587;
2902 } else {
2903 // Find "effective pad width"
2904 Double_t width = 0.218 / (1.31e-4 * TMath::Exp (2.688 * TMath::Log(qtot)) + 1) * 2;
2905 width = TMath::Min (width, 0.4);
2906 erry = width / TMath::Sqrt(12.);
2907 erry = TMath::Max (erry, 0.01293);
2908 }
2909 goto x; //return;
2910 }
2911
2912/* ---> "Bad" fit */
2913 if (fmin > 0.4) {
2914 erry = 0.1556;
2915 if (ny == 5) erry = 0.06481;
2916 goto x; //return;
2917 }
2918
2919/* ---> By != 0 */
2920 if (iby != 0) {
2921 if (ny > 2) {
2922 erry = 0.00417; //0.01010
2923 } else {
2924 // ny = 2
2925 if (dyc * iby > -0.05) {
2926 Double_t dyc2 = dyc * dyc;
2927 if (iby < 0) {
2928 corr = 0.019 - 0.602 * dyc + 8.739 * dyc2 - 44.209 * dyc2 * dyc;
2929 corr = TMath::Min (corr, TMath::Abs(-0.25-dyc));
2930 yrec -= corr;
2931 //dyc -= corr;
2932 erry = 0.00814;
2933 } else {
2934 corr = 0.006 + 0.300 * dyc + 6.147 * dyc2 + 42.039 * dyc2 * dyc;
2935 corr = TMath::Min (corr, 0.25-dyc);
2936 yrec += corr;
2937 //dyc += corr;
2938 erry = 0.01582;
2939 }
2940 } else {
2941 erry = (0.00303 + 0.00296) / 2;
2942 }
2943 }
2944 goto x; //return;
2945 }
2946
2947/* ---> Overflows */
2948 if (iovery != 0) {
2949 if (qtot < 3000) {
2950 erry = 0.0671;
2951 } else {
2952 if (iovery > 1) {
2953 erry = 0.09214;
2954 } else if (TMath::Abs(wy - 5) < 0.1) {
2955 erry = 0.061; //0.06622
2956 } else {
2957 erry = 0.00812; // 0.01073
2958 }
2959 }
2960 goto x; //return;
2961 }
2962
2963/* ---> "Good" but very high signal */
2964 if (qtot > 4000) {
2965 if (TMath::Abs(wy - 4) < 0.1) {
2966 erry = 0.00117;
2967 } else if (fmin < 0.03 && qtot < 6000) {
2968 erry = 0.01003;
2969 } else {
2970 erry = 0.1931;
2971 }
2972 goto x; //return;
2973 }
2974
2975/* ---> "Good" clusters */
2976 if (ny > 3) {
2977 if (TMath::Abs(wy - 5) < 0.1) {
2978 erry = 0.0011; //0.00304
2979 } else if (qtot < 400.) {
2980 erry = 0.0165;
2981 } else {
2982 erry = 0.00135; // 0.00358
2983 }
2984 } else if (ny == 3) {
2985 if (TMath::Abs(wy - 4) < 0.1) {
2986 erry = 35.407 / (1 + TMath::Exp(5.511*TMath::Log(qtot/265.51))) + 11.564;
2987 //erry = 83.512 / (1 + TMath::Exp(3.344*TMath::Log(qtot/211.58))) + 12.260;
2988 } else {
2989 erry = 147.03 / (1 + TMath::Exp(1.713*TMath::Log(qtot/73.151))) + 9.575;
2990 //erry = 91.743 / (1 + TMath::Exp(2.332*TMath::Log(qtot/151.67))) + 11.453;
2991 }
2992 erry *= 1.e-4;
2993 } else {
2994 // ny = 2
2995 if (TMath::Abs(wy - 4) < 0.1) {
2996 erry = 60.800 / (1 + TMath::Exp(3.305*TMath::Log(qtot/104.53))) + 11.702;
2997 //erry = 73.128 / (1 + TMath::Exp(5.676*TMath::Log(qtot/120.93))) + 17.839;
2998 } else {
2999 erry = 117.98 / (1 + TMath::Exp(2.005*TMath::Log(qtot/37.649))) + 21.431;
3000 //erry = 99.066 / (1 + TMath::Exp(4.900*TMath::Log(qtot/107.57))) + 25.315;
3001 }
3002 erry *= 1.e-4;
3003 }
3004 //return;
3005
3006 x:
3007/* ---> X-coordinate */
3008/* ---> Y-side */
3009 if (wx > 11) {
3010 errx = 0.0036;
3011 xrec -= 0.1385;
3012 return;
3013 }
3014/* ---> Nx = 1 */
3015 if (nx == 1) {
3016 if (TMath::Abs(wx - 6) < 0.1) {
3017 if (qtot < 40) errx = 0.1693;
3018 else errx = 0.06241;
3019 } else if (TMath::Abs(wx - 7.5) < 0.1) {
3020 if (qtot < 40) errx = 0.2173;
3021 else errx = 0.07703;
3022 } else if (TMath::Abs(wx - 10) < 0.1) {
3023 if (ibx == 0) {
3024 if (qtot < 40) errx = 0.2316;
3025 else errx = 0.1426;
3026 } else {
3027 xrec += (0.2115 + 0.1942) / 2 * ibx;
3028 errx = 0.1921;
3029 }
3030 }
3031 return;
3032 }
3033/* ---> "Bad" fit */
3034 if (fmin > 0.5) {
3035 errx = 0.1591;
3036 return;
3037 }
3038/* ---> Bx != 0 */
3039 if (ibx != 0) {
3040 if (ibx > 0) { errx = 0.06761; xrec -= 0.03832; }
3041 else { errx = 0.06653; xrec += 0.02581; }
3042 return;
3043 }
3044/* ---> Overflows */
3045 if (iover != 0) {
3046 if (TMath::Abs(wx - 6) < 0.1) errx = 0.06979;
3047 else if (TMath::Abs(wx - 7.5) < 0.1) errx = 0.1089;
3048 else if (TMath::Abs(wx - 10) < 0.1) errx = 0.09847;
3049 return;
3050 }
3051/* ---> Good */
3052 if (TMath::Abs(wx - 6) < 0.1) errx = 0.06022;
3053 else if (TMath::Abs(wx - 7.5) < 0.1) errx = 0.07247;
3054 else if (TMath::Abs(wx - 10) < 0.1) errx = 0.07359;
3055}
3056