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1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18// -------------------------------
19// Class AliMUONClusterFinderVS
20// -------------------------------
21// Class for clustering and reconstruction of space points
22// (Not used by default)
23
24#include "AliMUONClusterFinderVS.h"
25#include "AliMUONDigit.h"
26#include "AliMUONRawCluster.h"
27#include "AliMUONGeometrySegmentation.h"
28#include "AliMUONMathieson.h"
29#include "AliMUONClusterInput.h"
30#include "AliMUONDigitMapA1.h"
31
32#include "AliLog.h"
33
34#include <TMinuit.h>
35#include <TF1.h>
36#include <TMinuit.h>
37#include <Riostream.h>
38
39
40//_____________________________________________________________________
41// This function is minimized in the double-Mathieson fit
42void fcnS2(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag);
43void fcnS1(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag);
44void fcnCombiS1(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag);
45void fcnCombiS2(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag);
46
47ClassImp(AliMUONClusterFinderVS)
48
49AliMUONClusterFinderVS::AliMUONClusterFinderVS()
50 : TObject()
51{
52/// Default constructor
53 fInput=AliMUONClusterInput::Instance();
54 fDigitMap[0] = 0;
55 fDigitMap[1] = 0;
56 fTrack[0]=fTrack[1]=-1;
57 fGhostChi2Cut = 1e6; // nothing done by default
58 fSeg2[0] = 0;
59 fSeg2[1] = 0;
60
61 for(Int_t i=0; i<100; i++) {
62 for (Int_t j=0; j<2; j++) {
63 fDig[i][j] = 0;
64 }
65 }
66 fRawClusters = new TClonesArray("AliMUONRawCluster",1000);
67 fNRawClusters = 0;
68}
69 //____________________________________________________________________________
70AliMUONClusterFinderVS::~AliMUONClusterFinderVS()
71{
72/// Destructor
73
74 // Reset tracks information
75 fNRawClusters = 0;
76 if (fRawClusters) {
77 fRawClusters->Delete();
78 delete fRawClusters;
79 }
80}
81
82AliMUONClusterFinderVS::AliMUONClusterFinderVS(const AliMUONClusterFinderVS & clusterFinder):TObject(clusterFinder)
83{
84/// Protected copy constructor
85
86 AliFatal("Not implemented.");
87}
88//____________________________________________________________________________
89void AliMUONClusterFinderVS::ResetRawClusters()
90{
91/// Reset tracks information
92 fNRawClusters = 0;
93 if (fRawClusters) fRawClusters->Clear();
94}
95//____________________________________________________________________________
96void AliMUONClusterFinderVS::Decluster(AliMUONRawCluster *cluster)
97{
98/// Decluster by local maxima
99 SplitByLocalMaxima(cluster);
100}
101//____________________________________________________________________________
102void AliMUONClusterFinderVS::SplitByLocalMaxima(AliMUONRawCluster *c)
103{
104/// Split complex cluster by local maxima
105 Int_t cath, i;
106
107 fInput->SetCluster(c);
108
109 fMul[0]=c->GetMultiplicity(0);
110 fMul[1]=c->GetMultiplicity(1);
111
112//
113// dump digit information into arrays
114//
115
116 Float_t qtot;
117
118 for (cath=0; cath<2; cath++) {
119 qtot=0;
120
121 for (i=0; i<fMul[cath]; i++) {
122 // pointer to digit
123 fDig[i][cath]=fInput->Digit(cath, c->GetIndex(i, cath));
124 // pad coordinates
125 fIx[i][cath]= fDig[i][cath]->PadX();
126 fIy[i][cath]= fDig[i][cath]->PadY();
127 // pad charge
128 fQ[i][cath] = fDig[i][cath]->Signal();
129 // pad centre coordinates
130 fSeg2[cath]->
131 GetPadC(fInput->DetElemId(), fIx[i][cath], fIy[i][cath], fX[i][cath], fY[i][cath], fZ[i][cath]);
132 } // loop over cluster digits
133
134 } // loop over cathodes
135
136
137 FindLocalMaxima(c);
138
139//
140// Initialise and perform mathieson fits
141 Float_t chi2, oldchi2;
142// ++++++++++++++++++*************+++++++++++++++++++++
143// (1) No more than one local maximum per cathode plane
144// +++++++++++++++++++++++++++++++*************++++++++
145 if ((fNLocal[0]==1 && (fNLocal[1]==0 || fNLocal[1]==1)) ||
146 (fNLocal[0]==0 && fNLocal[1]==1)) {
147// Perform combined single Mathieson fit
148// Initial values for coordinates (x,y)
149
150 // One local maximum on cathodes 1 and 2 (X->cathode 2, Y->cathode 1)
151 if (fNLocal[0]==1 && fNLocal[1]==1) {
152 fXInit[0]=c->GetX(1);
153 fYInit[0]=c->GetY(0);
154 // One local maximum on cathode 1 (X,Y->cathode 1)
155 } else if (fNLocal[0]==1) {
156 fXInit[0]=c->GetX(0);
157 fYInit[0]=c->GetY(0);
158 // One local maximum on cathode 2 (X,Y->cathode 2)
159 } else {
160 fXInit[0]=c->GetX(1);
161 fYInit[0]=c->GetY(1);
162 }
163 AliDebug(1,"cas (1) CombiSingleMathiesonFit(c)");
164 chi2=CombiSingleMathiesonFit(c);
165// Int_t ndf = fgNbins[0]+fgNbins[1]-2;
166// Float_t prob = TMath::Prob(Double_t(chi2),ndf);
167// prob1->Fill(prob);
168// chi2_1->Fill(chi2);
169 oldchi2=chi2;
170 AliDebug(1,Form(" chi2 %f ",chi2));
171
172 c->SetX(0, fXFit[0]);
173 c->SetY(0, fYFit[0]);
174
175 c->SetX(1,fXFit[0]);
176 c->SetY(1,fYFit[0]);
177 c->SetChi2(0,chi2);
178 c->SetChi2(1,chi2);
179 // Force on anod
180
181 c->SetX(0, fSeg2[0]->GetAnod(fInput->DetElemId(), c->GetX(0)));
182 c->SetX(1, fSeg2[1]->GetAnod(fInput->DetElemId(), c->GetX(1)));
183
184 // c->SetDetElemId(fInput->DetElemId());
185 // If reasonable chi^2 add result to the list of rawclusters
186 if (chi2 < 0.3) {
187 AddRawCluster(*c);
188 // If not try combined double Mathieson Fit
189 } else {
190 AliDebug(1," MAUVAIS CHI2 !!!\n");
191 if (fNLocal[0]==1 && fNLocal[1]==1) {
192 fXInit[0]=fX[fIndLocal[0][1]][1];
193 fYInit[0]=fY[fIndLocal[0][0]][0];
194 fXInit[1]=fX[fIndLocal[0][1]][1];
195 fYInit[1]=fY[fIndLocal[0][0]][0];
196 } else if (fNLocal[0]==1) {
197 fXInit[0]=fX[fIndLocal[0][0]][0];
198 fYInit[0]=fY[fIndLocal[0][0]][0];
199 fXInit[1]=fX[fIndLocal[0][0]][0];
200 fYInit[1]=fY[fIndLocal[0][0]][0];
201 } else {
202 fXInit[0]=fX[fIndLocal[0][1]][1];
203 fYInit[0]=fY[fIndLocal[0][1]][1];
204 fXInit[1]=fX[fIndLocal[0][1]][1];
205 fYInit[1]=fY[fIndLocal[0][1]][1];
206 }
207
208// Initial value for charge ratios
209 fQrInit[0]=0.5;
210 fQrInit[1]=0.5;
211 AliDebug(1,"\n cas (1) CombiDoubleMathiesonFit(c)\n");
212 chi2=CombiDoubleMathiesonFit(c);
213// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
214// Float_t prob = TMath::Prob(chi2,ndf);
215// prob2->Fill(prob);
216// chi2_2->Fill(chi2);
217
218// Was this any better ??
219 AliDebug(1,Form(" Old and new chi2 %f %f ", oldchi2, chi2));
220 if (fFitStat!=0 && chi2>0 && (2.*chi2 < oldchi2)) {
221 AliDebug(1,"Split");
222 // Split cluster into two according to fit result
223 Split(c);
224 } else {
225 AliDebug(1,"Do not Split");
226 // Don't split
227 AddRawCluster(*c);
228 }
229 }
230
231// +++++++++++++++++++++++++++++++++++++++
232// (2) Two local maxima per cathode plane
233// +++++++++++++++++++++++++++++++++++++++
234 } else if (fNLocal[0]==2 && fNLocal[1]==2) {
235//
236// Let's look for ghosts first
237
238 Float_t xm[4][2], ym[4][2];
239 Float_t dpx, dpy, dx, dy;
240 Int_t ixm[4][2], iym[4][2];
241 Int_t isec, im1, im2, ico;
242//
243// Form the 2x2 combinations
244// 0-0, 0-1, 1-0, 1-1
245 ico=0;
246 for (im1=0; im1<2; im1++) {
247 for (im2=0; im2<2; im2++) {
248 xm[ico][0]=fX[fIndLocal[im1][0]][0];
249 ym[ico][0]=fY[fIndLocal[im1][0]][0];
250 xm[ico][1]=fX[fIndLocal[im2][1]][1];
251 ym[ico][1]=fY[fIndLocal[im2][1]][1];
252
253 ixm[ico][0]=fIx[fIndLocal[im1][0]][0];
254 iym[ico][0]=fIy[fIndLocal[im1][0]][0];
255 ixm[ico][1]=fIx[fIndLocal[im2][1]][1];
256 iym[ico][1]=fIy[fIndLocal[im2][1]][1];
257 ico++;
258 }
259 }
260// ico = 0 : first local maximum on cathodes 1 and 2
261// ico = 1 : fisrt local maximum on cathode 1 and second on cathode 2
262// ico = 2 : second local maximum on cathode 1 and first on cathode 1
263// ico = 3 : second local maximum on cathodes 1 and 2
264
265// Analyse the combinations and keep those that are possible !
266// For each combination check consistency in x and y
267 Int_t iacc;
268 Bool_t accepted[4];
269 Float_t dr[4] = {1.e4, 1.e4, 1.e4, 1.e4};
270 iacc=0;
271
272// In case of staggering maxima are displaced by exactly half the pad-size in y.
273// We have to take into account the numerical precision in the consistency check;
274 Float_t eps = 1.e-5;
275//
276 for (ico=0; ico<4; ico++) {
277 accepted[ico]=kFALSE;
278// cathode one: x-coordinate
279 isec=fSeg2[0]->Sector(fInput->DetElemId(), ixm[ico][0], iym[ico][0]);
280 dpx=fSeg2[0]->Dpx(fInput->DetElemId(), isec)/2.;
281
282 dx=TMath::Abs(xm[ico][0]-xm[ico][1]);
283// cathode two: y-coordinate
284
285 isec=fSeg2[1]->Sector(fInput->DetElemId(), ixm[ico][1], iym[ico][1]);
286 dpy=fSeg2[1]->Dpy(fInput->DetElemId(), isec)/2.;
287
288 dy=TMath::Abs(ym[ico][0]-ym[ico][1]);
289 AliDebug(2,Form("\n %i %f %f %f %f %f %f \n", ico, ym[ico][0], ym[ico][1], dy, dpy, dx, dpx ));
290 if ((dx <= dpx) && (dy <= dpy+eps)) {
291 // consistent
292 accepted[ico]=kTRUE;
293 dr[ico] = TMath::Sqrt(dx*dx+dy*dy);
294 iacc++;
295 } else {
296 // reject
297 accepted[ico]=kFALSE;
298 }
299 }
300 AliDebug(1,Form("\n iacc= %d:\n", iacc));
301 if (iacc == 3) {
302 if (accepted[0] && accepted[1]) {
303 if (dr[0] >= dr[1]) {
304 accepted[0]=kFALSE;
305 } else {
306 accepted[1]=kFALSE;
307 }
308 }
309
310 if (accepted[2] && accepted[3]) {
311 if (dr[2] >= dr[3]) {
312 accepted[2]=kFALSE;
313 } else {
314 accepted[3]=kFALSE;
315 }
316 }
317/*
318// eliminate one candidate
319 Float_t drmax = 0;
320 Int_t icobad = -1;
321
322 for (ico=0; ico<4; ico++) {
323 if (accepted[ico] && dr[ico] > drmax) {
324 icobad = ico;
325 drmax = dr[ico];
326 }
327 }
328
329 accepted[icobad] = kFALSE;
330*/
331 iacc = 2;
332 }
333
334
335 AliDebug(1,Form("\n iacc= %d:\n", iacc));
336 if (iacc==2) {
337 AliDebug(1,"\n iacc=2: No problem ! \n");
338 } else if (iacc==4) {
339 AliDebug(1,"\n iacc=4: Ok, but ghost problem !!! \n");
340 } else if (iacc==0) {
341 AliDebug(1,"\n iacc=0: I don't know what to do with this !!!!!!!!! \n");
342 }
343
344// Initial value for charge ratios
345 fQrInit[0]=Float_t(fQ[fIndLocal[0][0]][0])/
346 Float_t(fQ[fIndLocal[0][0]][0]+fQ[fIndLocal[1][0]][0]);
347 fQrInit[1]=Float_t(fQ[fIndLocal[0][1]][1])/
348 Float_t(fQ[fIndLocal[0][1]][1]+fQ[fIndLocal[1][1]][1]);
349
350// ******* iacc = 0 *******
351// No combinations found between the 2 cathodes
352// We keep the center of gravity of the cluster
353 if (iacc==0) {
354 AddRawCluster(*c);
355 }
356
357// ******* iacc = 1 *******
358// Only one combination found between the 2 cathodes
359 if (iacc==1) {
360// Initial values for the 2 maxima (x,y)
361
362// 1 maximum is initialised with the maximum of the combination found (X->cathode 2, Y->cathode 1)
363// 1 maximum is initialised with the other maximum of the first cathode
364 if (accepted[0]){
365 AliDebug(1,"ico=0");
366 fXInit[0]=xm[0][1];
367 fYInit[0]=ym[0][0];
368 fXInit[1]=xm[3][0];
369 fYInit[1]=ym[3][0];
370 } else if (accepted[1]){
371 AliDebug(1,"ico=1");
372 fXInit[0]=xm[1][1];
373 fYInit[0]=ym[1][0];
374 fXInit[1]=xm[2][0];
375 fYInit[1]=ym[2][0];
376 } else if (accepted[2]){
377 AliDebug(1,"ico=2");
378 fXInit[0]=xm[2][1];
379 fYInit[0]=ym[2][0];
380 fXInit[1]=xm[1][0];
381 fYInit[1]=ym[1][0];
382 } else if (accepted[3]){
383 AliDebug(1,"ico=3");
384 fXInit[0]=xm[3][1];
385 fYInit[0]=ym[3][0];
386 fXInit[1]=xm[0][0];
387 fYInit[1]=ym[0][0];
388 }
389 AliDebug(1,"cas (2) CombiDoubleMathiesonFit(c)");
390 chi2=CombiDoubleMathiesonFit(c);
391// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
392// Float_t prob = TMath::Prob(chi2,ndf);
393// prob2->Fill(prob);
394// chi2_2->Fill(chi2);
395 AliDebug(1,Form(" chi2 %f\n",chi2));
396
397// If reasonable chi^2 add result to the list of rawclusters
398 if (chi2<10) {
399 Split(c);
400
401 } else {
402// 1 maximum is initialised with the maximum of the combination found (X->cathode 2, Y->cathode 1)
403// 1 maximum is initialised with the other maximum of the second cathode
404 if (accepted[0]){
405 AliDebug(1,"ico=0");
406 fXInit[0]=xm[0][1];
407 fYInit[0]=ym[0][0];
408 fXInit[1]=xm[3][1];
409 fYInit[1]=ym[3][1];
410 } else if (accepted[1]){
411 AliDebug(1,"ico=1");
412 fXInit[0]=xm[1][1];
413 fYInit[0]=ym[1][0];
414 fXInit[1]=xm[2][1];
415 fYInit[1]=ym[2][1];
416 } else if (accepted[2]){
417 AliDebug(1,"ico=2");
418 fXInit[0]=xm[2][1];
419 fYInit[0]=ym[2][0];
420 fXInit[1]=xm[1][1];
421 fYInit[1]=ym[1][1];
422 } else if (accepted[3]){
423 AliDebug(1,"ico=3");
424 fXInit[0]=xm[3][1];
425 fYInit[0]=ym[3][0];
426 fXInit[1]=xm[0][1];
427 fYInit[1]=ym[0][1];
428 }
429 AliDebug(1,"\n cas (2) CombiDoubleMathiesonFit(c)\n");
430 chi2=CombiDoubleMathiesonFit(c);
431// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
432// Float_t prob = TMath::Prob(chi2,ndf);
433// prob2->Fill(prob);
434// chi2_2->Fill(chi2);
435 AliDebug(1,Form(" chi2 %f\n",chi2));
436
437// If reasonable chi^2 add result to the list of rawclusters
438 if (chi2<10) {
439 Split(c);
440 } else {
441//We keep only the combination found (X->cathode 2, Y->cathode 1)
442 for (Int_t ico=0; ico<2; ico++) {
443 if (accepted[ico]) {
444 AliMUONRawCluster cnew;
445 Int_t cath;
446 for (cath=0; cath<2; cath++) {
447 cnew.SetX(cath, Float_t(xm[ico][1]));
448 cnew.SetY(cath, Float_t(ym[ico][0]));
449 cnew.SetZ(cath, fZPlane);
450 cnew.SetMultiplicity(cath,c->GetMultiplicity(cath));
451 for (i=0; i<fMul[cath]; i++) {
452 cnew.SetIndex(i, cath, c->GetIndex(i,cath));
453 fSeg2[cath]->SetPad(fInput->DetElemId(), fIx[i][cath], fIy[i][cath]);
454 }
455 AliDebug(1,Form("\nRawCluster %d cath %d\n",ico,cath));
456 AliDebug(1,Form("mult_av %d\n",c->GetMultiplicity(cath)));
457 FillCluster(&cnew,cath);
458 }
459 cnew.SetClusterType(cnew.PhysicsContribution());
460 AddRawCluster(cnew);
461 fNPeaks++;
462 }
463 }
464 }
465 }
466 }
467
468// ******* iacc = 2 *******
469// Two combinations found between the 2 cathodes
470 if (iacc==2) {
471// Was the same maximum taken twice
472 if ((accepted[0]&&accepted[1]) || (accepted[2]&&accepted[3])) {
473 AliDebug(1,"\n Maximum taken twice !!!\n");
474
475// Have a try !! with that
476 if (accepted[0]&&accepted[3]) {
477 fXInit[0]=xm[0][1];
478 fYInit[0]=ym[0][0];
479 fXInit[1]=xm[1][1];
480 fYInit[1]=ym[1][0];
481 } else {
482 fXInit[0]=xm[2][1];
483 fYInit[0]=ym[2][0];
484 fXInit[1]=xm[3][1];
485 fYInit[1]=ym[3][0];
486 }
487 AliDebug(1,"\n cas (2) CombiDoubleMathiesonFit(c)\n");
488 chi2=CombiDoubleMathiesonFit(c);
489// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
490// Float_t prob = TMath::Prob(chi2,ndf);
491// prob2->Fill(prob);
492// chi2_2->Fill(chi2);
493 Split(c);
494
495 } else {
496// No ghosts ! No Problems ! - Perform one fit only !
497 if (accepted[0]&&accepted[3]) {
498 fXInit[0]=xm[0][1];
499 fYInit[0]=ym[0][0];
500 fXInit[1]=xm[3][1];
501 fYInit[1]=ym[3][0];
502 } else {
503 fXInit[0]=xm[1][1];
504 fYInit[0]=ym[1][0];
505 fXInit[1]=xm[2][1];
506 fYInit[1]=ym[2][0];
507 }
508 AliDebug(1,"\n cas (2) CombiDoubleMathiesonFit(c)\n");
509 chi2=CombiDoubleMathiesonFit(c);
510// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
511// Float_t prob = TMath::Prob(chi2,ndf);
512// prob2->Fill(prob);
513// chi2_2->Fill(chi2);
514 AliDebug(1,Form(" chi2 %f\n",chi2));
515 Split(c);
516 }
517
518// ******* iacc = 4 *******
519// Four combinations found between the 2 cathodes
520// Ghost !!
521 } else if (iacc==4) {
522// Perform fits for the two possibilities !!
523// Accept if charges are compatible on both cathodes
524// If none are compatible, keep everything
525 fXInit[0]=xm[0][1];
526 fYInit[0]=ym[0][0];
527 fXInit[1]=xm[3][1];
528 fYInit[1]=ym[3][0];
529 AliDebug(1,"\n cas (2) CombiDoubleMathiesonFit(c)\n");
530 chi2=CombiDoubleMathiesonFit(c);
531// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
532// Float_t prob = TMath::Prob(chi2,ndf);
533// prob2->Fill(prob);
534// chi2_2->Fill(chi2);
535 AliDebug(1,Form(" chi2 %f\n",chi2));
536 // store results of fit and postpone decision
537 Double_t sXFit[2],sYFit[2],sQrFit[2];
538 Float_t sChi2[2];
539 for (Int_t i=0;i<2;i++) {
540 sXFit[i]=fXFit[i];
541 sYFit[i]=fYFit[i];
542 sQrFit[i]=fQrFit[i];
543 sChi2[i]=fChi2[i];
544 }
545 fXInit[0]=xm[1][1];
546 fYInit[0]=ym[1][0];
547 fXInit[1]=xm[2][1];
548 fYInit[1]=ym[2][0];
549 AliDebug(1,"\n cas (2) CombiDoubleMathiesonFit(c)\n");
550 chi2=CombiDoubleMathiesonFit(c);
551// ndf = fgNbins[0]+fgNbins[1]-6;
552// prob = TMath::Prob(chi2,ndf);
553// prob2->Fill(prob);
554// chi2_2->Fill(chi2);
555 AliDebug(1,Form(" chi2 %f\n",chi2));
556 // We have all informations to perform the decision
557 // Compute the chi2 for the 2 possibilities
558 Float_t chi2fi,chi2si,chi2f,chi2s;
559
560 chi2f = (TMath::Log(fInput->TotalCharge(0)*fQrFit[0]
561 / (fInput->TotalCharge(1)*fQrFit[1]) )
562 / fInput->ChargeCorrel() );
563 chi2f *=chi2f;
564 chi2fi = (TMath::Log(fInput->TotalCharge(0)*(1-fQrFit[0])
565 / (fInput->TotalCharge(1)*(1-fQrFit[1])) )
566 / fInput->ChargeCorrel() );
567 chi2f += chi2fi*chi2fi;
568
569 chi2s = (TMath::Log(fInput->TotalCharge(0)*sQrFit[0]
570 / (fInput->TotalCharge(1)*sQrFit[1]) )
571 / fInput->ChargeCorrel() );
572 chi2s *=chi2s;
573 chi2si = (TMath::Log(fInput->TotalCharge(0)*(1-sQrFit[0])
574 / (fInput->TotalCharge(1)*(1-sQrFit[1])) )
575 / fInput->ChargeCorrel() );
576 chi2s += chi2si*chi2si;
577
578 // usefull to store the charge matching chi2 in the cluster
579 // fChi2[0]=sChi2[1]=chi2f;
580 // fChi2[1]=sChi2[0]=chi2s;
581
582 if (chi2f<=fGhostChi2Cut && chi2s<=fGhostChi2Cut)
583 c->SetGhost(1);
584 if (chi2f>fGhostChi2Cut && chi2s>fGhostChi2Cut) {
585 // we keep the ghost
586 c->SetGhost(2);
587 chi2s=-1;
588 chi2f=-1;
589 }
590 if (chi2f<=fGhostChi2Cut)
591 Split(c);
592 if (chi2s<=fGhostChi2Cut) {
593 // retreive saved values
594 for (Int_t i=0;i<2;i++) {
595 fXFit[i]=sXFit[i];
596 fYFit[i]=sYFit[i];
597 fQrFit[i]=sQrFit[i];
598 fChi2[i]=sChi2[i];
599 }
600 Split(c);
601 }
602 c->SetGhost(0);
603 }
604
605 } else if (fNLocal[0]==2 && fNLocal[1]==1) {
606// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
607// (3) Two local maxima on cathode 1 and one maximum on cathode 2
608// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
609//
610 Float_t xm[4][2], ym[4][2];
611 Float_t dpx, dpy, dx, dy;
612 Int_t ixm[4][2], iym[4][2];
613 Int_t isec, im1, ico;
614//
615// Form the 2x2 combinations
616// 0-0, 0-1, 1-0, 1-1
617 ico=0;
618 for (im1=0; im1<2; im1++) {
619 xm[ico][0]=fX[fIndLocal[im1][0]][0];
620 ym[ico][0]=fY[fIndLocal[im1][0]][0];
621 xm[ico][1]=fX[fIndLocal[0][1]][1];
622 ym[ico][1]=fY[fIndLocal[0][1]][1];
623
624 ixm[ico][0]=fIx[fIndLocal[im1][0]][0];
625 iym[ico][0]=fIy[fIndLocal[im1][0]][0];
626 ixm[ico][1]=fIx[fIndLocal[0][1]][1];
627 iym[ico][1]=fIy[fIndLocal[0][1]][1];
628 ico++;
629 }
630// ico = 0 : first local maximum on cathodes 1 and 2
631// ico = 1 : second local maximum on cathode 1 and first on cathode 2
632
633// Analyse the combinations and keep those that are possible !
634// For each combination check consistency in x and y
635 Int_t iacc;
636 Bool_t accepted[4];
637 iacc=0;
638 // In case of staggering maxima are displaced by exactly half the pad-size in y.
639 // We have to take into account the numerical precision in the consistency check;
640
641 Float_t eps = 1.e-5;
642
643 for (ico=0; ico<2; ico++) {
644 isec=fSeg2[0]->Sector(fInput->DetElemId(), ixm[ico][0], iym[ico][0]);
645 dpx=fSeg2[0]->Dpx(fInput->DetElemId(), isec)/2.;
646
647 dx=TMath::Abs(xm[ico][0]-xm[ico][1]);
648 isec=fSeg2[1]->Sector(fInput->DetElemId(), ixm[ico][1], iym[ico][1]);
649 dpy=fSeg2[1]->Dpy(fInput->DetElemId(), isec)/2.;
650
651 dy=TMath::Abs(ym[ico][0]-ym[ico][1]);
652 AliDebug(2,Form("\n %i %f %f %f %f \n", ico, ym[ico][0], ym[ico][1], dy, dpy ));
653 if ((dx <= dpx) && (dy <= dpy+eps)) {
654 // consistent
655 accepted[ico]=kTRUE;
656 iacc++;
657 } else {
658 // reject
659 accepted[ico]=kFALSE;
660 }
661 }
662
663 Float_t chi21 = 100;
664 Float_t chi22 = 100;
665 Float_t chi23 = 100;
666
667 // Initial value for charge ratios
668 fQrInit[0]=Float_t(fQ[fIndLocal[0][0]][0])/
669 Float_t(fQ[fIndLocal[0][0]][0]+fQ[fIndLocal[1][0]][0]);
670 fQrInit[1]=fQrInit[0];
671
672 if (accepted[0] && accepted[1]) {
673
674 fXInit[0]=0.5*(xm[0][1]+xm[0][0]);
675 fYInit[0]=ym[0][0];
676 fXInit[1]=0.5*(xm[0][1]+xm[1][0]);
677 fYInit[1]=ym[1][0];
678 fQrInit[0]=0.5;
679 fQrInit[1]=0.5;
680 chi23=CombiDoubleMathiesonFit(c);
681 if (chi23<10) {
682 Split(c);
683 Float_t yst;
684 yst = fYFit[0];
685 fYFit[0] = fYFit[1];
686 fYFit[1] = yst;
687 Split(c);
688 }
689 } else if (accepted[0]) {
690 fXInit[0]=xm[0][1];
691 fYInit[0]=ym[0][0];
692 fXInit[1]=xm[1][0];
693 fYInit[1]=ym[1][0];
694 chi21=CombiDoubleMathiesonFit(c);
695// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
696// Float_t prob = TMath::Prob(chi2,ndf);
697// prob2->Fill(prob);
698// chi2_2->Fill(chi21);
699 AliDebug(1,Form(" chi2 %f\n",chi21));
700 if (chi21<10) Split(c);
701 } else if (accepted[1]) {
702 fXInit[0]=xm[1][1];
703 fYInit[0]=ym[1][0];
704 fXInit[1]=xm[0][0];
705 fYInit[1]=ym[0][0];
706 chi22=CombiDoubleMathiesonFit(c);
707// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
708// Float_t prob = TMath::Prob(chi2,ndf);
709// prob2->Fill(prob);
710// chi2_2->Fill(chi22);
711 AliDebug(1,Form(" chi2 %f\n",chi22));
712 if (chi22<10) Split(c);
713 }
714
715 if (chi21 > 10 && chi22 > 10 && chi23 > 10) {
716// We keep only the combination found (X->cathode 2, Y->cathode 1)
717 for (Int_t ico=0; ico<2; ico++) {
718 if (accepted[ico]) {
719 AliMUONRawCluster cnew;
720 Int_t cath;
721 for (cath=0; cath<2; cath++) {
722 cnew.SetX(cath, Float_t(xm[ico][1]));
723 cnew.SetY(cath, Float_t(ym[ico][0]));
724 cnew.SetZ(cath, fZPlane);
725 cnew.SetMultiplicity(cath, c->GetMultiplicity(cath));
726 for (i=0; i<fMul[cath]; i++) {
727 cnew.SetIndex(i, cath, c->GetIndex(i, cath));
728 fSeg2[cath]->SetPad(fInput->DetElemId(), fIx[i][cath], fIy[i][cath]);
729
730 }
731 AliDebug(1,Form("\nRawCluster %d cath %d\n",ico,cath));
732 AliDebug(1,Form("mult_av %d\n",c->GetMultiplicity(cath)));
733
734 FillCluster(&cnew,cath);
735 }
736 cnew.SetClusterType(cnew.PhysicsContribution());
737 AddRawCluster(cnew);
738 fNPeaks++;
739 }
740 }
741 }
742
743// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
744// (3') One local maximum on cathode 1 and two maxima on cathode 2
745// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
746 } else if (fNLocal[0]==1 && fNLocal[1]==2) {
747 Float_t xm[4][2], ym[4][2];
748 Float_t dpx, dpy, dx, dy;
749 Int_t ixm[4][2], iym[4][2];
750 Int_t isec, im1, ico;
751//
752// Form the 2x2 combinations
753// 0-0, 0-1, 1-0, 1-1
754 ico=0;
755 for (im1=0; im1<2; im1++) {
756 xm[ico][0]=fX[fIndLocal[0][0]][0];
757 ym[ico][0]=fY[fIndLocal[0][0]][0];
758 xm[ico][1]=fX[fIndLocal[im1][1]][1];
759 ym[ico][1]=fY[fIndLocal[im1][1]][1];
760
761 ixm[ico][0]=fIx[fIndLocal[0][0]][0];
762 iym[ico][0]=fIy[fIndLocal[0][0]][0];
763 ixm[ico][1]=fIx[fIndLocal[im1][1]][1];
764 iym[ico][1]=fIy[fIndLocal[im1][1]][1];
765 ico++;
766 }
767// ico = 0 : first local maximum on cathodes 1 and 2
768// ico = 1 : first local maximum on cathode 1 and second on cathode 2
769
770// Analyse the combinations and keep those that are possible !
771// For each combination check consistency in x and y
772 Int_t iacc;
773 Bool_t accepted[4];
774 iacc=0;
775 // In case of staggering maxima are displaced by exactly half the pad-size in y.
776 // We have to take into account the numerical precision in the consistency check;
777 Float_t eps = 1.e-5;
778
779
780 for (ico=0; ico<2; ico++) {
781 accepted[ico]=kFALSE;
782 isec=fSeg2[0]->Sector(fInput->DetElemId(), ixm[ico][0], iym[ico][0]);
783 dpx=fSeg2[0]->Dpx(fInput->DetElemId(), isec)/2.;
784
785 dx=TMath::Abs(xm[ico][0]-xm[ico][1]);
786 isec=fSeg2[1]->Sector(fInput->DetElemId(), ixm[ico][1], iym[ico][1]);
787 dpy=fSeg2[1]->Dpy(fInput->DetElemId(), isec)/2.;
788
789 dy=TMath::Abs(ym[ico][0]-ym[ico][1]);
790 AliDebug(1,Form("\n %i %f %f %f %f \n", ico, ym[ico][0], ym[ico][1], dy, dpy ));
791 if ((dx <= dpx) && (dy <= dpy+eps)) {
792 // consistent
793 accepted[ico]=kTRUE;
794 AliDebug(1,Form("ico %d\n",ico));
795 iacc++;
796 } else {
797 // reject
798 accepted[ico]=kFALSE;
799 }
800 }
801
802 Float_t chi21 = 100;
803 Float_t chi22 = 100;
804 Float_t chi23 = 100;
805
806 fQrInit[1]=Float_t(fQ[fIndLocal[0][1]][1])/
807 Float_t(fQ[fIndLocal[0][1]][1]+fQ[fIndLocal[1][1]][1]);
808
809 fQrInit[0]=fQrInit[1];
810
811
812 if (accepted[0] && accepted[1]) {
813 fXInit[0]=xm[0][1];
814 fYInit[0]=0.5*(ym[0][0]+ym[0][1]);
815 fXInit[1]=xm[1][1];
816 fYInit[1]=0.5*(ym[0][0]+ym[1][1]);
817 fQrInit[0]=0.5;
818 fQrInit[1]=0.5;
819 chi23=CombiDoubleMathiesonFit(c);
820 if (chi23<10) {
821 Split(c);
822 Float_t yst;
823 yst = fYFit[0];
824 fYFit[0] = fYFit[1];
825 fYFit[1] = yst;
826 Split(c);
827 }
828 } else if (accepted[0]) {
829 fXInit[0]=xm[0][0];
830 fYInit[0]=ym[0][1];
831 fXInit[1]=xm[1][1];
832 fYInit[1]=ym[1][1];
833 chi21=CombiDoubleMathiesonFit(c);
834// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
835// Float_t prob = TMath::Prob(chi2,ndf);
836// prob2->Fill(prob);
837// chi2_2->Fill(chi21);
838 AliDebug(1,Form(" chi2 %f\n",chi21));
839 if (chi21<10) Split(c);
840 } else if (accepted[1]) {
841 fXInit[0]=xm[1][0];
842 fYInit[0]=ym[1][1];
843 fXInit[1]=xm[0][1];
844 fYInit[1]=ym[0][1];
845 chi22=CombiDoubleMathiesonFit(c);
846// Int_t ndf = fgNbins[0]+fgNbins[1]-6;
847// Float_t prob = TMath::Prob(chi2,ndf);
848// prob2->Fill(prob);
849// chi2_2->Fill(chi22);
850 AliDebug(1,Form(" chi2 %f\n",chi22));
851 if (chi22<10) Split(c);
852 }
853
854 if (chi21 > 10 && chi22 > 10 && chi23 > 10) {
855//We keep only the combination found (X->cathode 2, Y->cathode 1)
856 for (Int_t ico=0; ico<2; ico++) {
857 if (accepted[ico]) {
858 AliMUONRawCluster cnew;
859 Int_t cath;
860 for (cath=0; cath<2; cath++) {
861 cnew.SetX(cath, Float_t(xm[ico][1]));
862 cnew.SetY(cath, Float_t(ym[ico][0]));
863 cnew.SetZ(cath, fZPlane);
864 cnew.SetMultiplicity(cath, c->GetMultiplicity(cath));
865 for (i=0; i<fMul[cath]; i++) {
866 cnew.SetIndex(i, cath, c->GetIndex(i, cath));
867 fSeg2[cath]->SetPad(fInput->DetElemId(), fIx[i][cath], fIy[i][cath]);
868 }
869 AliDebug(1,Form("\nRawCluster %d cath %d\n",ico,cath));
870 AliDebug(1,Form("mult_av %d\n",c->GetMultiplicity(cath)));
871 FillCluster(&cnew,cath);
872 }
873 cnew.SetClusterType(cnew.PhysicsContribution());
874 AddRawCluster(cnew);
875 fNPeaks++;
876 }
877 }
878 }
879
880// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
881// (4) At least three local maxima on cathode 1 or on cathode 2
882// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
883 } else if (fNLocal[0]>2 || fNLocal[1]>2) {
884 Int_t param = fNLocal[0]*fNLocal[1];
885 Int_t ii;
886
887 Float_t ** xm = new Float_t * [param];
888 for (ii=0; ii<param; ii++) xm[ii]=new Float_t [2];
889 Float_t ** ym = new Float_t * [param];
890 for (ii=0; ii<param; ii++) ym[ii]=new Float_t [2];
891 Int_t ** ixm = new Int_t * [param];
892 for (ii=0; ii<param; ii++) ixm[ii]=new Int_t [2];
893 Int_t ** iym = new Int_t * [param];
894 for (ii=0; ii<param; ii++) iym[ii]=new Int_t [2];
895
896 Int_t isec, ico;
897 Float_t dpx, dpy, dx, dy;
898
899 ico=0;
900 for (Int_t im1=0; im1<fNLocal[0]; im1++) {
901 for (Int_t im2=0; im2<fNLocal[1]; im2++) {
902 xm[ico][0]=fX[fIndLocal[im1][0]][0];
903 ym[ico][0]=fY[fIndLocal[im1][0]][0];
904 xm[ico][1]=fX[fIndLocal[im2][1]][1];
905 ym[ico][1]=fY[fIndLocal[im2][1]][1];
906
907 ixm[ico][0]=fIx[fIndLocal[im1][0]][0];
908 iym[ico][0]=fIy[fIndLocal[im1][0]][0];
909 ixm[ico][1]=fIx[fIndLocal[im2][1]][1];
910 iym[ico][1]=fIy[fIndLocal[im2][1]][1];
911 ico++;
912 }
913 }
914
915 Int_t nIco = ico;
916 AliDebug(1,Form("nIco %d\n",nIco));
917 for (ico=0; ico<nIco; ico++) {
918 AliDebug(1,Form("ico = %d\n",ico));
919 isec=fSeg2[0]->Sector(fInput->DetElemId(), ixm[ico][0], iym[ico][0]);
920 dpx=fSeg2[0]->Dpx(fInput->DetElemId(), isec)/2.;
921
922 dx=TMath::Abs(xm[ico][0]-xm[ico][1]);
923 isec=fSeg2[1]->Sector(fInput->DetElemId(), ixm[ico][1], iym[ico][1]);
924 dpy=fSeg2[1]->Dpy(fInput->DetElemId(), isec)/2.;
925
926 dy=TMath::Abs(ym[ico][0]-ym[ico][1]);
927 AliDebug(1,Form("dx %f dpx %f dy %f dpy %f\n",dx,dpx,dy,dpy));
928 AliDebug(1,Form(" X %f Y %f\n",xm[ico][1],ym[ico][0]));
929 if ((dx <= dpx) && (dy <= dpy)) {
930 AliDebug(1,"ok\n");
931 Int_t cath;
932 AliMUONRawCluster cnew;
933 for (cath=0; cath<2; cath++) {
934 cnew.SetX(cath, Float_t(xm[ico][1]));
935 cnew.SetY(cath, Float_t(ym[ico][0]));
936 cnew.SetZ(cath, fZPlane);
937 cnew.SetMultiplicity(cath, c->GetMultiplicity(cath));
938 for (i=0; i<fMul[cath]; i++) {
939 cnew.SetIndex(i, cath, c->GetIndex(i, cath));
940 fSeg2[cath]->SetPad(fInput->DetElemId(), fIx[i][cath], fIy[i][cath]);
941 }
942 FillCluster(&cnew,cath);
943 }
944 cnew.SetClusterType(cnew.PhysicsContribution());
945 // cnew.SetDetElemId(fInput->DetElemId());
946 AddRawCluster(cnew);
947 fNPeaks++;
948 }
949 }
950 delete [] xm;
951 delete [] ym;
952 delete [] ixm;
953 delete [] iym;
954 }
955}
956
957void AliMUONClusterFinderVS::FindLocalMaxima(AliMUONRawCluster* /*c*/)
958{
959/// Find all local maxima of a cluster
960 AliDebug(1,"\n Find Local maxima !");
961
962 AliMUONDigit* digt;
963
964 Int_t cath, cath1; // loops over cathodes
965 Int_t i; // loops over digits
966 Int_t j; // loops over cathodes
967//
968// Find local maxima
969//
970// counters for number of local maxima
971 fNLocal[0]=fNLocal[1]=0;
972// flags digits as local maximum
973 Bool_t isLocal[100][2];
974 for (i=0; i<100;i++) {
975 isLocal[i][0]=isLocal[i][1]=kFALSE;
976 }
977// number of next neighbours and arrays to store them
978 Int_t nn;
979 Int_t x[10], y[10];
980 // loop over cathodes
981 for (cath=0; cath<2; cath++) {
982 // loop over cluster digits
983 for (i=0; i<fMul[cath]; i++) {
984 // get neighbours for that digit and assume that it is local maximum
985 Int_t isec;
986 Float_t a0;
987
988 fSeg2[cath]->Neighbours(fInput->DetElemId(), fIx[i][cath], fIy[i][cath], &nn, x, y);
989
990 isLocal[i][cath]=kTRUE;
991 isec = fSeg2[cath]->Sector(fInput->DetElemId(), fIx[i][cath], fIy[i][cath]);
992 a0 = fSeg2[cath]->Dpx(fInput->DetElemId(), isec)*fSeg2[cath]->Dpy(fInput->DetElemId(), isec);
993
994 // loop over next neighbours, if at least one neighbour has higher charger assumption
995 // digit is not local maximum
996 for (j=0; j<nn; j++) {
997 if (fDigitMap[cath]->TestHit(x[j], y[j])==kEmpty) continue;
998 digt=(AliMUONDigit*) fDigitMap[cath]->GetHit(x[j], y[j]);
999 Float_t a1;
1000 isec=fSeg2[cath]->Sector(fInput->DetElemId(), x[j], y[j]);
1001 a1 = fSeg2[cath]->Dpx(fInput->DetElemId(),isec)*fSeg2[cath]->Dpy(fInput->DetElemId(), isec);
1002
1003 if (digt->Signal()/a1 > fQ[i][cath]/a0) {
1004 isLocal[i][cath]=kFALSE;
1005 break;
1006 //
1007 // handle special case of neighbouring pads with equal signal
1008 } else if (digt->Signal() == fQ[i][cath]) {
1009 if (fNLocal[cath]>0) {
1010 for (Int_t k=0; k<fNLocal[cath]; k++) {
1011 if (x[j]==fIx[fIndLocal[k][cath]][cath]
1012 && y[j]==fIy[fIndLocal[k][cath]][cath])
1013 {
1014 isLocal[i][cath]=kFALSE;
1015 }
1016 } // loop over local maxima
1017 } // are there already local maxima
1018 } // same charge ?
1019 } // loop over next neighbours
1020 if (isLocal[i][cath]) {
1021 fIndLocal[fNLocal[cath]][cath]=i;
1022 fNLocal[cath]++;
1023 }
1024 } // loop over all digits
1025 } // loop over cathodes
1026
1027 AliDebug(1,Form("\n Found %d %d %d %d local Maxima\n",
1028 fNLocal[0], fNLocal[1], fMul[0], fMul[1]));
1029 AliDebug(1,Form("\n Cathode 1 local Maxima %d Multiplicite %d\n",fNLocal[0], fMul[0]));
1030 AliDebug(1,Form(" Cathode 2 local Maxima %d Multiplicite %d\n",fNLocal[1], fMul[1]));
1031 Int_t ix, iy, isec;
1032 Float_t dpx, dpy;
1033
1034
1035 if (fNLocal[1]==2 && (fNLocal[0]==1 || fNLocal[0]==0)) {
1036 Int_t iback=fNLocal[0];
1037
1038// Two local maxima on cathode 2 and one maximum on cathode 1
1039// Look for local maxima considering up and down neighbours on the 1st cathode only
1040//
1041// Loop over cluster digits
1042 cath=0;
1043 cath1=1;
1044
1045 for (i=0; i<fMul[cath]; i++) {
1046 isec=fSeg2[cath]->Sector(fInput->DetElemId(), fIx[i][cath],fIy[i][cath]);
1047 dpy=fSeg2[cath]->Dpy(fInput->DetElemId(), isec);
1048 dpx=fSeg2[cath]->Dpx(fInput->DetElemId(), isec);
1049
1050 if (isLocal[i][cath]) continue;
1051// Pad position should be consistent with position of local maxima on the opposite cathode
1052 if ((TMath::Abs(fX[i][cath]-fX[fIndLocal[0][cath1]][cath1]) > dpx/2.) &&
1053 (TMath::Abs(fX[i][cath]-fX[fIndLocal[1][cath1]][cath1]) > dpx/2.))
1054 continue;
1055
1056// get neighbours for that digit and assume that it is local maximum
1057 isLocal[i][cath]=kTRUE;
1058// compare signal to that on the two neighbours on the left and on the right
1059// iNN counts the number of neighbours with signal, it should be 1 or 2
1060 Int_t iNN=0;
1061
1062
1063 for (fSeg2[cath]->FirstPad(fInput->DetElemId(), fX[i][cath], fY[i][cath], fZPlane, 0., dpy);
1064 fSeg2[cath]->MorePads(fInput->DetElemId());
1065 fSeg2[cath]->NextPad(fInput->DetElemId()))
1066 {
1067 ix = fSeg2[cath]->Ix();
1068 iy = fSeg2[cath]->Iy();
1069 // skip the current pad
1070 if (iy == fIy[i][cath]) continue;
1071
1072 if (fDigitMap[cath]->TestHit(ix, iy)!=kEmpty) {
1073 iNN++;
1074 digt=(AliMUONDigit*) fDigitMap[cath]->GetHit(ix,iy);
1075 if (digt->Signal() > fQ[i][cath]) isLocal[i][cath]=kFALSE;
1076 }
1077 } // Loop over pad neighbours in y
1078
1079 if (isLocal[i][cath] && iNN>0) {
1080 fIndLocal[fNLocal[cath]][cath]=i;
1081 fNLocal[cath]++;
1082 }
1083 } // loop over all digits
1084// if one additional maximum has been found we are happy
1085// if more maxima have been found restore the previous situation
1086 AliDebug(1,Form("\n New search gives %d local maxima for cathode 1 \n",
1087 fNLocal[0]));
1088 AliDebug(1,Form(" %d local maxima for cathode 2 \n",
1089 fNLocal[1]));
1090 if (fNLocal[cath]>2) {
1091 fNLocal[cath]=iback;
1092 }
1093
1094 } // 1,2 local maxima
1095
1096 if (fNLocal[0]==2 && (fNLocal[1]==1 || fNLocal[1]==0)) {
1097 Int_t iback=fNLocal[1];
1098
1099// Two local maxima on cathode 1 and one maximum on cathode 2
1100// Look for local maxima considering left and right neighbours on the 2nd cathode only
1101 cath=1;
1102 Int_t cath1 = 0;
1103 Float_t eps = 1.e-5;
1104
1105//
1106// Loop over cluster digits
1107 for (i=0; i<fMul[cath]; i++) {
1108 isec=fSeg2[cath]->Sector(fInput->DetElemId(), fIx[i][cath],fIy[i][cath]);
1109 dpx=fSeg2[cath]->Dpx(fInput->DetElemId(), isec);
1110 dpy=fSeg2[cath]->Dpy(fInput->DetElemId(), isec);
1111
1112
1113 if (isLocal[i][cath]) continue;
1114// Pad position should be consistent with position of local maxima on the opposite cathode
1115 if ((TMath::Abs(fY[i][cath]-fY[fIndLocal[0][cath1]][cath1]) > dpy/2.+eps) &&
1116 (TMath::Abs(fY[i][cath]-fY[fIndLocal[1][cath1]][cath1]) > dpy/2.+eps))
1117 continue;
1118
1119//
1120// get neighbours for that digit and assume that it is local maximum
1121 isLocal[i][cath]=kTRUE;
1122// compare signal to that on the two neighbours on the left and on the right
1123
1124// iNN counts the number of neighbours with signal, it should be 1 or 2
1125 Int_t iNN=0;
1126 for (fSeg2[cath]->FirstPad(fInput->DetElemId(), fX[i][cath], fY[i][cath], fZPlane, dpx, 0.);
1127 fSeg2[cath]->MorePads(fInput->DetElemId());
1128 fSeg2[cath]->NextPad(fInput->DetElemId()))
1129 {
1130
1131 ix = fSeg2[cath]->Ix();
1132 iy = fSeg2[cath]->Iy();
1133
1134 // skip the current pad
1135 if (ix == fIx[i][cath]) continue;
1136
1137 if (fDigitMap[cath]->TestHit(ix, iy)!=kEmpty) {
1138 iNN++;
1139 digt=(AliMUONDigit*) fDigitMap[cath]->GetHit(ix,iy);
1140 if (digt->Signal() > fQ[i][cath]) isLocal[i][cath]=kFALSE;
1141 }
1142 } // Loop over pad neighbours in x
1143
1144 if (isLocal[i][cath] && iNN>0) {
1145 fIndLocal[fNLocal[cath]][cath]=i;
1146 fNLocal[cath]++;
1147 }
1148 } // loop over all digits
1149// if one additional maximum has been found we are happy
1150// if more maxima have been found restore the previous situation
1151 AliDebug(1,Form("\n New search gives %d local maxima for cathode 1 \n",fNLocal[0]));
1152 AliDebug(1,Form("\n %d local maxima for cathode 2 \n",fNLocal[1]));
1153 AliDebug(1,Form("\n New search gives %d %d \n",fNLocal[0],fNLocal[1]));
1154 if (fNLocal[cath]>2) {
1155 fNLocal[cath]=iback;
1156 }
1157 } // 2,1 local maxima
1158}
1159
1160
1161void AliMUONClusterFinderVS::FillCluster(AliMUONRawCluster* c, Int_t flag, Int_t cath)
1162{
1163/// Completes cluster information starting from list of digits
1164
1165 AliMUONDigit* dig;
1166 Float_t x, y, z;
1167 Int_t ix, iy;
1168
1169 if (cath==1) {
1170 c->SetPeakSignal(cath,c->GetPeakSignal(0));
1171 } else {
1172 c->SetPeakSignal(cath,0);
1173 }
1174
1175
1176 if (flag) {
1177 c->SetX(cath,0.);
1178 c->SetY(cath,0.);
1179 c->SetCharge(cath,0);
1180 }
1181
1182 AliDebug(1,Form("\n fPeakSignal %d\n",c->GetPeakSignal(cath)));
1183 for (Int_t i=0; i<c->GetMultiplicity(cath); i++)
1184 {
1185 dig= fInput->Digit(cath,c->GetIndex(i,cath));
1186 ix=dig->PadX()+c->GetOffset(i,cath);
1187 iy=dig->PadY();
1188 Int_t q=dig->Signal();
1189 if (!flag) q=Int_t(q*c->GetContrib(i,cath));
1190 // fprintf(stderr,"q %d c->fPeakSignal[ %d ] %d\n",q,cath,c->fPeakSignal[cath]);
1191 if (dig->Physics() >= dig->Signal()) {
1192 c->SetPhysics(i,2);
1193 } else if (dig->Physics() == 0) {
1194 c->SetPhysics(i,0);
1195 } else c->SetPhysics(i,1);
1196 //
1197 //
1198 AliDebug(2,Form("q %d c->fPeakSignal[cath] %d\n",q,c->GetPeakSignal(cath)));
1199 // peak signal and track list
1200 if (q>c->GetPeakSignal(cath)) {
1201 c->SetPeakSignal(cath, q);
1202 c->SetTrack(0,dig->Hit());
1203 c->SetTrack(1,dig->Track(0));
1204 c->SetTrack(2,dig->Track(1));
1205 // fprintf(stderr," c->fTracks[0] %d c->fTracks[1] %d\n",dig->fHit,dig->fTracks[0]);
1206 }
1207 //
1208 if (flag) {
1209 fSeg2[cath]->GetPadC(fInput->DetElemId(), ix, iy, x, y, z);
1210
1211 c->AddX(cath, q*x);
1212 c->AddY(cath, q*y);
1213 c->AddCharge(cath, q);
1214 }
1215 } // loop over digits
1216 AliDebug(1," fin du cluster c\n");
1217
1218
1219 if (flag) {
1220 c->SetX(cath, c->GetX(cath)/c->GetCharge(cath));
1221 // Force on anod
1222 c->SetX(cath, fSeg2[cath]->GetAnod(fInput->DetElemId(), c->GetX(cath)));
1223 c->SetY(cath, c->GetY(cath)/c->GetCharge(cath));
1224 //
1225 // apply correction to the coordinate along the anode wire
1226 //
1227 x=c->GetX(cath);
1228 y=c->GetY(cath);
1229 TF1* cogCorr;
1230 Int_t isec;
1231 fSeg2[cath]->GetPadI(fInput->DetElemId(), x, y, fZPlane, ix, iy);
1232 fSeg2[cath]->GetPadC(fInput->DetElemId(), ix, iy, x, y, z);
1233 isec=fSeg2[cath]->Sector(fInput->DetElemId(), ix,iy);
1234 cogCorr = fSeg2[cath]->CorrFunc(fInput->DetElemId(), isec-1);
1235
1236
1237 if (cogCorr) {
1238 Float_t yOnPad;
1239 yOnPad=(c->GetY(cath)-y)/fSeg2[cath]->Dpy(fInput->DetElemId(), isec);
1240
1241 c->SetY(cath, c->GetY(cath)-cogCorr->Eval(yOnPad, 0, 0));
1242 // slat ID from digit
1243
1244 }
1245 }
1246}
1247
1248void AliMUONClusterFinderVS::FillCluster(AliMUONRawCluster* c, Int_t cath)
1249{
1250/// Completes cluster information starting from list of digits
1251
1252 static Float_t dr0;
1253
1254 AliMUONDigit* dig;
1255
1256 if (cath==0) {
1257 dr0 = 10000;
1258 }
1259
1260 Float_t xpad, ypad, zpad;
1261 Float_t dx, dy, dr;
1262
1263 for (Int_t i=0; i<c->GetMultiplicity(cath); i++)
1264 {
1265 dig = fInput->Digit(cath,c->GetIndex(i,cath));
1266 fSeg2[cath]->
1267 GetPadC(fInput->DetElemId(),dig->PadX(),dig->PadY(),xpad,ypad, zpad);
1268 AliDebug(1,Form("x %f y %f cx %f cy %f\n",xpad,ypad,c->GetX(0),c->GetY(0)));
1269 dx = xpad - c->GetX(0);
1270 dy = ypad - c->GetY(0);
1271 dr = TMath::Sqrt(dx*dx+dy*dy);
1272
1273 if (dr < dr0) {
1274 dr0 = dr;
1275 AliDebug(1,Form(" dr %f\n",dr));
1276 Int_t q=dig->Signal();
1277 if (dig->Physics() >= dig->Signal()) {
1278 c->SetPhysics(i,2);
1279 } else if (dig->Physics() == 0) {
1280 c->SetPhysics(i,0);
1281 } else c->SetPhysics(i,1);
1282 c->SetPeakSignal(cath,q);
1283 c->SetTrack(0,dig->Hit());
1284 c->SetTrack(1,dig->Track(0));
1285 c->SetTrack(2,dig->Track(1));
1286
1287 AliDebug(1,Form(" c->fTracks[0] %d c->fTracks[1] %d\n",dig->Hit(),
1288 dig->Track(0)));
1289 }
1290 //
1291 } // loop over digits
1292
1293 // apply correction to the coordinate along the anode wire
1294 // Force on anod
1295 c->SetX(cath,fSeg2[cath]->GetAnod(fInput->DetElemId(), c->GetX(cath)));
1296}
1297
1298void AliMUONClusterFinderVS::FindCluster(Int_t i, Int_t j, Int_t cath, AliMUONRawCluster &c)
1299{
1300/// Find a super cluster on both cathodes
1301/// Add i,j as element of the cluster
1302
1303 Int_t idx = fDigitMap[cath]->GetHitIndex(i,j);
1304 AliMUONDigit* dig = (AliMUONDigit*) fDigitMap[cath]->GetHit(i,j);
1305 Int_t q=dig->Signal();
1306 Int_t theX=dig->PadX();
1307 Int_t theY=dig->PadY();
1308
1309 if (q > TMath::Abs(c.GetPeakSignal(0)) && q > TMath::Abs(c.GetPeakSignal(1))) {
1310 c.SetPeakSignal(cath,q);
1311 c.SetTrack(0,dig->Hit());
1312 c.SetTrack(1,dig->Track(0));
1313 c.SetTrack(2,dig->Track(1));
1314 }
1315
1316//
1317// Make sure that list of digits is ordered
1318//
1319 Int_t mu=c.GetMultiplicity(cath);
1320 c.SetIndex(mu, cath, idx);
1321
1322 if (dig->Physics() >= dig->Signal()) {
1323 c.SetPhysics(mu,2);
1324 } else if (dig->Physics() == 0) {
1325 c.SetPhysics(mu,0);
1326 } else c.SetPhysics(mu,1);
1327
1328
1329 if (mu > 0) {
1330 for (Int_t ind = mu-1; ind >= 0; ind--) {
1331 Int_t ist=c.GetIndex(ind,cath);
1332 Int_t ql=fInput->Digit(cath, ist)->Signal();
1333 Int_t ix=fInput->Digit(cath, ist)->PadX();
1334 Int_t iy=fInput->Digit(cath, ist)->PadY();
1335
1336 if (q>ql || (q==ql && theX > ix && theY < iy)) {
1337 c.SetIndex(ind, cath, idx);
1338 c.SetIndex(ind+1, cath, ist);
1339 } else {
1340
1341 break;
1342 }
1343 }
1344 }
1345
1346 c.SetMultiplicity(cath, c.GetMultiplicity(cath)+1);
1347 if (c.GetMultiplicity(cath) >= 50 ) {
1348 AliDebug(1,Form("FindCluster - multiplicity >50 %d \n",c.GetMultiplicity(0)));
1349 c.SetMultiplicity(cath, 49);
1350 }
1351
1352// Prepare center of gravity calculation
1353 Float_t x, y, z;
1354 fSeg2[cath]->GetPadC(fInput->DetElemId(), i, j, x, y, z);
1355 c.AddX(cath,q*x);
1356 c.AddY(cath,q*y);
1357 c.AddCharge(cath,q);
1358//
1359// Flag hit as "taken"
1360 fDigitMap[cath]->FlagHit(i,j);
1361//
1362// Now look recursively for all neighbours and pad hit on opposite cathode
1363//
1364// Loop over neighbours
1365 Int_t ix,iy;
1366 ix=iy=0;
1367 Int_t nn;
1368 Int_t xList[10], yList[10];
1369 fSeg2[cath]->Neighbours(fInput->DetElemId(), i,j,&nn,xList,yList);
1370 for (Int_t in=0; in<nn; in++) {
1371 ix=xList[in];
1372 iy=yList[in];
1373
1374 if (fDigitMap[cath]->TestHit(ix,iy)==kUnused) {
1375 AliDebug(2,Form("\n Neighbours %d %d %d", cath, ix, iy));
1376 FindCluster(ix, iy, cath, c);
1377 }
1378
1379 }
1380 Int_t nOpp=0;
1381 Int_t iXopp[50], iYopp[50];
1382
1383// Neighbours on opposite cathode
1384// Take into account that several pads can overlap with the present pad
1385 Int_t isec;
1386 isec=fSeg2[cath]->Sector(fInput->DetElemId(), i,j);
1387
1388 Int_t iop;
1389 Float_t dx, dy;
1390
1391 if (cath==0) {
1392 iop = 1;
1393 dx = (fSeg2[cath]->Dpx(fInput->DetElemId(), isec))/2.;
1394 dy = 0.;
1395 } else {
1396 iop = 0;
1397 dx = 0.;
1398 dy = (fSeg2[cath]->Dpy(fInput->DetElemId(), isec))/2;
1399 }
1400
1401
1402
1403 // loop over pad neighbours on opposite cathode
1404 for (fSeg2[iop]->FirstPad(fInput->DetElemId(), x, y, fZPlane, dx, dy);
1405 fSeg2[iop]->MorePads(fInput->DetElemId());
1406 fSeg2[iop]->NextPad(fInput->DetElemId()))
1407 {
1408
1409 ix = fSeg2[iop]->Ix(); iy = fSeg2[iop]->Iy();
1410 AliDebug(2,Form("\n ix, iy: %f %f %f %d %d %d", x,y,z,ix, iy, fSector));
1411 if (fDigitMap[iop]->TestHit(ix,iy)==kUnused){
1412 iXopp[nOpp]=ix;
1413 iYopp[nOpp++]=iy;
1414 AliDebug(2,Form("\n Opposite %d %d %d", iop, ix, iy));
1415 }
1416
1417 } // Loop over pad neighbours
1418 // This had to go outside the loop since recursive calls inside the iterator are not possible
1419 //
1420 Int_t jopp;
1421 for (jopp=0; jopp<nOpp; jopp++) {
1422 if (fDigitMap[iop]->TestHit(iXopp[jopp],iYopp[jopp]) == kUnused)
1423 FindCluster(iXopp[jopp], iYopp[jopp], iop, c);
1424 }
1425
1426}
1427
1428//_____________________________________________________________________________
1429
1430void AliMUONClusterFinderVS::FindRawClusters()
1431{
1432/// MUON cluster finder from digits -- finds neighbours on both cathodes and
1433/// fills the tree with raw clusters
1434
1435 ResetRawClusters();
1436// Return if no input datad available
1437 if (!fInput->NDigits(0) && !fInput->NDigits(1)) return;
1438
1439 fSeg2[0] = fInput->Segmentation2(0);
1440 fSeg2[1] = fInput->Segmentation2(1);
1441
1442 Int_t detElemId = fInput->DetElemId();
1443
1444 Int_t npx0 = fSeg2[0]->Npx(detElemId)+1;
1445 Int_t npy0 = fSeg2[0]->Npy(detElemId)+1;
1446 fDigitMap[0] = new AliMUONDigitMapA1(detElemId, npx0, npy0);
1447
1448 Int_t npx1 = fSeg2[0]->Npx(detElemId)+1;
1449 Int_t npy1 = fSeg2[0]->Npy(detElemId)+1;
1450 fDigitMap[1] = new AliMUONDigitMapA1(detElemId, npx1, npy1);
1451
1452 AliMUONDigit *dig;
1453
1454 Int_t ndig, cath;
1455 Int_t nskip=0;
1456 Int_t ncls=0;
1457
1458 fDigitMap[0]->FillHits(fInput->Digits(0));
1459 fDigitMap[1]->FillHits(fInput->Digits(1));
1460//
1461// Outer Loop over Cathodes
1462 for (cath = 0; cath < 2; cath++) {
1463
1464 for (ndig=0; ndig<fInput->NDigits(cath); ndig++) {
1465 dig = fInput->Digit(cath, ndig);
1466 Int_t padx = dig->PadX();
1467 Int_t pady = dig->PadY();
1468 if (fDigitMap[cath]->TestHit(padx,pady)==kUsed ||fDigitMap[0]->TestHit(padx,pady)==kEmpty) {
1469 nskip++;
1470 continue;
1471 }
1472 AliDebug(1,Form("\n CATHODE %d CLUSTER %d\n",cath,ncls));
1473 AliMUONRawCluster clus;
1474 clus.SetMultiplicity(0, 0);
1475 clus.SetMultiplicity(1, 0);
1476 clus.SetPeakSignal(cath,dig->Signal());
1477 clus.SetTrack(0, dig->Hit());
1478 clus.SetTrack(1, dig->Track(0));
1479 clus.SetTrack(2, dig->Track(1));
1480
1481 AliDebug(1,Form("idDE %d Padx %d Pady %d", fInput->DetElemId(), padx, pady));
1482
1483 // tag the beginning of cluster list in a raw cluster
1484 clus.SetNcluster(0,-1);
1485 Float_t xcu, ycu;
1486 fSeg2[cath]->GetPadC(fInput->DetElemId(), padx, pady, xcu, ycu, fZPlane);
1487 fSector= fSeg2[cath]->Sector(fInput->DetElemId(), padx, pady)/100;
1488
1489
1490
1491
1492 FindCluster(padx,pady,cath,clus);
1493 //^^^^^^^^^^^^^^^^^^^^^^^^
1494 // center of gravity
1495 if (clus.GetX(0)!=0.) clus.SetX(0, clus.GetX(0)/clus.GetCharge(0)); // clus.fX[0] /= clus.fQ[0];
1496
1497 // Force on anod
1498 clus.SetX(0,fSeg2[0]->GetAnod(fInput->DetElemId(), clus.GetX(0)));
1499 if (clus.GetY(0)!=0.) clus.SetY(0, clus.GetY(0)/clus.GetCharge(0)); // clus.fY[0] /= clus.fQ[0];
1500
1501 if(clus.GetCharge(1)!=0.) clus.SetX(1, clus.GetX(1)/clus.GetCharge(1)); // clus.fX[1] /= clus.fQ[1];
1502
1503 // Force on anod
1504 clus.SetX(1, fSeg2[0]->GetAnod(fInput->DetElemId(),clus.GetX(1)));
1505 if(clus.GetCharge(1)!=0.) clus.SetY(1, clus.GetY(1)/clus.GetCharge(1));// clus.fY[1] /= clus.fQ[1];
1506
1507 clus.SetZ(0, fZPlane);
1508 clus.SetZ(1, fZPlane);
1509
1510 AliDebug(1,Form("\n Cathode 1 multiplicite %d X(CG) %f Y(CG) %f\n",
1511 clus.GetMultiplicity(0),clus.GetX(0),clus.GetY(0)));
1512 AliDebug(1,Form(" Cathode 2 multiplicite %d X(CG) %f Y(CG) %f\n",
1513 clus.GetMultiplicity(1),clus.GetX(1),clus.GetY(1)));
1514 // Analyse cluster and decluster if necessary
1515 //
1516 ncls++;
1517 clus.SetNcluster(1,fNRawClusters);
1518 clus.SetClusterType(clus.PhysicsContribution());
1519
1520 fNPeaks=0;
1521 //
1522 //
1523 Decluster(&clus);
1524 //
1525 // reset Cluster object
1526 { // begin local scope
1527 for (int k=0;k<clus.GetMultiplicity(0);k++) clus.SetIndex(k, 0, 0);
1528 } // end local scope
1529
1530 { // begin local scope
1531 for (int k=0;k<clus.GetMultiplicity(1);k++) clus.SetIndex(k, 1, 0);
1532 } // end local scope
1533
1534 clus.SetMultiplicity(0,0);
1535 clus.SetMultiplicity(1,0);
1536
1537
1538 } // end loop ndig
1539 } // end loop cathodes
1540 delete fDigitMap[0];
1541 delete fDigitMap[1];
1542}
1543
1544Float_t AliMUONClusterFinderVS::SingleMathiesonFit(AliMUONRawCluster *c, Int_t cath)
1545{
1546/// Performs a single Mathieson fit on one cathode
1547
1548 Double_t arglist[20];
1549 Int_t ierflag=0;
1550 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
1551
1552 clusterInput.Fitter()->SetFCN(fcnS1);
1553 clusterInput.Fitter()->mninit(2,10,7);
1554 clusterInput.Fitter()->SetPrintLevel(-1 + AliLog::GetGlobalDebugLevel());
1555 arglist[0]=-1;
1556 clusterInput.Fitter()->mnexcm("SET NOW", arglist, 0, ierflag);
1557// Set starting values
1558 static Double_t vstart[2];
1559 vstart[0]=c->GetX(1);
1560 vstart[1]=c->GetY(0);
1561
1562
1563// lower and upper limits
1564 static Double_t lower[2], upper[2];
1565 Int_t ix,iy, isec;
1566 fSeg2[cath]->GetPadI(fInput->DetElemId(), c->GetX(cath), c->GetY(cath), fZPlane, ix, iy);
1567 isec=fSeg2[cath]->Sector(fInput->DetElemId(), ix, iy);
1568
1569 lower[0]=vstart[0]-fSeg2[cath]->Dpx(fInput->DetElemId(), isec)/2;
1570 lower[1]=vstart[1]-fSeg2[cath]->Dpy(fInput->DetElemId(), isec)/2;
1571
1572 upper[0]=lower[0]+fSeg2[cath]->Dpx(fInput->DetElemId(), isec);
1573 upper[1]=lower[1]+fSeg2[cath]->Dpy(fInput->DetElemId(), isec);
1574
1575
1576// step sizes
1577 static Double_t step[2]={0.0005, 0.0005};
1578
1579 clusterInput.Fitter()->mnparm(0,"x1",vstart[0],step[0],lower[0],upper[0],ierflag);
1580 clusterInput.Fitter()->mnparm(1,"y1",vstart[1],step[1],lower[1],upper[1],ierflag);
1581// ready for minimisation
1582 arglist[0]= -1;
1583 arglist[1]= 0;
1584
1585 clusterInput.Fitter()->mnexcm("SET NOGR", arglist, 0, ierflag);
1586 clusterInput.Fitter()->mnexcm("MIGRAD", arglist, 0, ierflag);
1587 // clusterInput.Fitter()->mnexcm("EXIT" , arglist, 0, ierflag);
1588 Double_t fmin, fedm, errdef;
1589 Int_t npari, nparx, istat;
1590
1591 clusterInput.Fitter()->mnstat(fmin, fedm, errdef, npari, nparx, istat);
1592 fFitStat=istat;
1593
1594// Print results
1595// Get fitted parameters
1596 Double_t xrec, yrec;
1597 TString chname;
1598 Double_t epxz, b1, b2;
1599 Int_t ierflg;
1600 clusterInput.Fitter()->mnpout(0, chname, xrec, epxz, b1, b2, ierflg);
1601 clusterInput.Fitter()->mnpout(1, chname, yrec, epxz, b1, b2, ierflg);
1602 fXFit[cath]=xrec;
1603 fYFit[cath]=yrec;
1604 return fmin;
1605}
1606
1607Float_t AliMUONClusterFinderVS::CombiSingleMathiesonFit(AliMUONRawCluster * /*c*/)
1608{
1609/// Perform combined Mathieson fit on both cathode planes
1610
1611 Double_t arglist[20];
1612 Int_t ierflag=0;
1613 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
1614 clusterInput.Fitter()->SetFCN(fcnCombiS1);
1615 clusterInput.Fitter()->mninit(2,10,7);
1616 clusterInput.Fitter()->SetPrintLevel(-1 + AliLog::GetGlobalDebugLevel());
1617 arglist[0]=-1;
1618 clusterInput.Fitter()->mnexcm("SET NOW", arglist, 0, ierflag);
1619 static Double_t vstart[2];
1620 vstart[0]=fXInit[0];
1621 vstart[1]=fYInit[0];
1622
1623
1624// lower and upper limits
1625 static Float_t lower[2], upper[2];
1626 Int_t ix,iy,isec;
1627 Float_t dpy, dpx;
1628
1629 fSeg2[0]->GetPadI(fInput->DetElemId(), fXInit[0], fYInit[0], fZPlane, ix, iy);
1630 isec=fSeg2[0]->Sector(fInput->DetElemId(), ix, iy);
1631 dpy=fSeg2[0]->Dpy(fInput->DetElemId(), isec);
1632 fSeg2[1]->GetPadI(fInput->DetElemId(), fXInit[0], fYInit[0], fZPlane, ix, iy);
1633 isec=fSeg2[1]->Sector(fInput->DetElemId(), ix, iy);
1634 dpx=fSeg2[1]->Dpx(fInput->DetElemId(), isec);
1635
1636 Int_t icount;
1637 Float_t xdum, ydum, zdum;
1638
1639// Find save upper and lower limits
1640
1641 icount = 0;
1642 for (fSeg2[1]->FirstPad(fInput->DetElemId(),fXInit[0], fYInit[0], fZPlane, dpx, 0.);
1643 fSeg2[1]->MorePads(fInput->DetElemId());
1644 fSeg2[1]->NextPad(fInput->DetElemId()))
1645 {
1646 ix=fSeg2[1]->Ix(); iy=fSeg2[1]->Iy();
1647 fSeg2[1]->GetPadC(fInput->DetElemId(), ix,iy, upper[0], ydum, zdum);
1648 if (icount ==0) lower[0]=upper[0];
1649 icount++;
1650 }
1651
1652 if (lower[0]>upper[0]) {xdum=lower[0]; lower[0]=upper[0]; upper[0]=xdum;}
1653
1654 icount=0;
1655 AliDebug(1,Form("\n single y %f %f", fXInit[0], fYInit[0]));
1656
1657 for (fSeg2[0]->FirstPad(fInput->DetElemId(), fXInit[0], fYInit[0], fZPlane, 0., dpy);
1658 fSeg2[0]->MorePads(fInput->DetElemId());
1659 fSeg2[0]->NextPad(fInput->DetElemId()))
1660 {
1661 ix=fSeg2[0]->Ix(); iy=fSeg2[0]->Iy();
1662 fSeg2[0]->GetPadC(fInput->DetElemId(), ix,iy,xdum,upper[1],zdum);
1663 if (icount ==0) lower[1]=upper[1];
1664 icount++;
1665 AliDebug(1,Form("\n upper lower %d %f %f", icount, upper[1], lower[1]));
1666 }
1667
1668 if (lower[1]>upper[1]) {xdum=lower[1]; lower[1]=upper[1]; upper[1]=xdum;}
1669
1670// step sizes
1671 static Double_t step[2]={0.00001, 0.0001};
1672
1673 clusterInput.Fitter()->mnparm(0,"x1",vstart[0],step[0],lower[0],upper[0],ierflag);
1674 clusterInput.Fitter()->mnparm(1,"y1",vstart[1],step[1],lower[1],upper[1],ierflag);
1675// ready for minimisation
1676 arglist[0]= -1;
1677 arglist[1]= 0;
1678
1679 clusterInput.Fitter()->mnexcm("SET NOGR", arglist, 0, ierflag);
1680 clusterInput.Fitter()->mnexcm("MIGRAD", arglist, 0, ierflag);
1681 // clusterInput.Fitter()->mnexcm("EXIT" , arglist, 0, ierflag);
1682 Double_t fmin, fedm, errdef;
1683 Int_t npari, nparx, istat;
1684
1685 clusterInput.Fitter()->mnstat(fmin, fedm, errdef, npari, nparx, istat);
1686 fFitStat=istat;
1687
1688// Print results
1689// Get fitted parameters
1690 Double_t xrec, yrec;
1691 TString chname;
1692 Double_t epxz, b1, b2;
1693 Int_t ierflg;
1694 clusterInput.Fitter()->mnpout(0, chname, xrec, epxz, b1, b2, ierflg);
1695 clusterInput.Fitter()->mnpout(1, chname, yrec, epxz, b1, b2, ierflg);
1696 fXFit[0]=xrec;
1697 fYFit[0]=yrec;
1698 return fmin;
1699}
1700
1701Bool_t AliMUONClusterFinderVS::DoubleMathiesonFit(AliMUONRawCluster * /*c*/, Int_t cath)
1702{
1703/// Performs a double Mathieson fit on one cathode
1704
1705//
1706// Initialise global variables for fit
1707 Double_t arglist[20];
1708 Int_t ierflag=0;
1709 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
1710 clusterInput.Fitter()->SetFCN(fcnS2);
1711 clusterInput.Fitter()->mninit(5,10,7);
1712 clusterInput.Fitter()->SetPrintLevel(-1 + AliLog::GetGlobalDebugLevel());
1713 arglist[0]=-1;
1714 clusterInput.Fitter()->mnexcm("SET NOW", arglist, 0, ierflag);
1715// Set starting values
1716 static Double_t vstart[5];
1717 vstart[0]=fX[fIndLocal[0][cath]][cath];
1718 vstart[1]=fY[fIndLocal[0][cath]][cath];
1719 vstart[2]=fX[fIndLocal[1][cath]][cath];
1720 vstart[3]=fY[fIndLocal[1][cath]][cath];
1721 vstart[4]=Float_t(fQ[fIndLocal[0][cath]][cath])/
1722 Float_t(fQ[fIndLocal[0][cath]][cath]+fQ[fIndLocal[1][cath]][cath]);
1723// lower and upper limits
1724 static Float_t lower[5], upper[5];
1725 Int_t isec;
1726
1727 isec=fSeg2[cath]->Sector(fInput->DetElemId(),fIx[fIndLocal[0][cath]][cath],
1728 fIy[fIndLocal[0][cath]][cath]);
1729 lower[0]=vstart[0]-fSeg2[cath]->Dpx(fInput->DetElemId(),isec);
1730 lower[1]=vstart[1]-fSeg2[cath]->Dpy(fInput->DetElemId(),isec);
1731
1732 upper[0]=lower[0]+2.*fSeg2[cath]->Dpx(fInput->DetElemId(),isec);
1733 upper[1]=lower[1]+2.*fSeg2[cath]->Dpy(fInput->DetElemId(),isec);
1734
1735 isec=fSeg2[cath]->Sector(fInput->DetElemId(),fIx[fIndLocal[1][cath]][cath],
1736 fIy[fIndLocal[1][cath]][cath]);
1737 lower[2]=vstart[2]-fSeg2[cath]->Dpx(fInput->DetElemId(),isec)/2;
1738 lower[3]=vstart[3]-fSeg2[cath]->Dpy(fInput->DetElemId(),isec)/2;
1739
1740 upper[2]=lower[2]+fSeg2[cath]->Dpx(fInput->DetElemId(),isec);
1741 upper[1]=lower[1]+2.*fSeg2[cath]->Dpy(fInput->DetElemId(),isec);
1742
1743
1744
1745 lower[4]=0.;
1746 upper[4]=1.;
1747// step sizes
1748 static Double_t step[5]={0.0005, 0.0005, 0.0005, 0.0005, 0.0001};
1749
1750 clusterInput.Fitter()->mnparm(0,"x1",vstart[0],step[0],lower[0],upper[0],ierflag);
1751 clusterInput.Fitter()->mnparm(1,"y1",vstart[1],step[1],lower[1],upper[1],ierflag);
1752 clusterInput.Fitter()->mnparm(2,"x2",vstart[2],step[2],lower[2],upper[2],ierflag);
1753 clusterInput.Fitter()->mnparm(3,"y2",vstart[3],step[3],lower[3],upper[3],ierflag);
1754 clusterInput.Fitter()->mnparm(4,"a0",vstart[4],step[4],lower[4],upper[4],ierflag);
1755// ready for minimisation
1756 arglist[0]= -1;
1757 arglist[1]= 0;
1758
1759 clusterInput.Fitter()->mnexcm("SET NOGR", arglist, 0, ierflag);
1760 clusterInput.Fitter()->mnexcm("MIGRAD", arglist, 0, ierflag);
1761 // clusterInput.Fitter()->mnexcm("EXIT" , arglist, 0, ierflag);
1762// Get fitted parameters
1763 Double_t xrec[2], yrec[2], qfrac;
1764 TString chname;
1765 Double_t epxz, b1, b2;
1766 Int_t ierflg;
1767 clusterInput.Fitter()->mnpout(0, chname, xrec[0], epxz, b1, b2, ierflg);
1768 clusterInput.Fitter()->mnpout(1, chname, yrec[0], epxz, b1, b2, ierflg);
1769 clusterInput.Fitter()->mnpout(2, chname, xrec[1], epxz, b1, b2, ierflg);
1770 clusterInput.Fitter()->mnpout(3, chname, yrec[1], epxz, b1, b2, ierflg);
1771 clusterInput.Fitter()->mnpout(4, chname, qfrac, epxz, b1, b2, ierflg);
1772
1773 Double_t fmin, fedm, errdef;
1774 Int_t npari, nparx, istat;
1775
1776 clusterInput.Fitter()->mnstat(fmin, fedm, errdef, npari, nparx, istat);
1777 fFitStat=istat;
1778 return kTRUE;
1779}
1780
1781Float_t AliMUONClusterFinderVS::CombiDoubleMathiesonFit(AliMUONRawCluster * /*c*/)
1782{
1783/// Perform combined double Mathieson fit on both cathode planes
1784
1785 Double_t arglist[20];
1786 Int_t ierflag=0;
1787 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
1788 clusterInput.Fitter()->SetFCN(fcnCombiS2);
1789 clusterInput.Fitter()->mninit(6,10,7);
1790 clusterInput.Fitter()->SetPrintLevel(-1 + AliLog::GetGlobalDebugLevel());
1791 arglist[0]=-1;
1792 clusterInput.Fitter()->mnexcm("SET NOW", arglist, 0, ierflag);
1793// Set starting values
1794 static Double_t vstart[6];
1795 vstart[0]=fXInit[0];
1796 vstart[1]=fYInit[0];
1797 vstart[2]=fXInit[1];
1798 vstart[3]=fYInit[1];
1799 vstart[4]=fQrInit[0];
1800 vstart[5]=fQrInit[1];
1801// lower and upper limits
1802 static Float_t lower[6], upper[6];
1803 Int_t ix,iy,isec;
1804 Float_t dpx, dpy;
1805
1806 fSeg2[1]->GetPadI(fInput->DetElemId(),fXInit[0], fYInit[0], fZPlane, ix, iy);
1807 isec=fSeg2[1]->Sector(fInput->DetElemId(),ix, iy);
1808 dpx=fSeg2[1]->Dpx(fInput->DetElemId(), isec);
1809
1810 fSeg2[0]->GetPadI(fInput->DetElemId(), fXInit[0], fYInit[0], fZPlane, ix, iy);
1811 isec=fSeg2[0]->Sector(fInput->DetElemId(), ix, iy);
1812 dpy=fSeg2[0]->Dpy(fInput->DetElemId(), isec);
1813
1814
1815
1816 Int_t icount;
1817 Float_t xdum, ydum, zdum;
1818 AliDebug(1,Form("\n Cluster Finder: %f %f %f %f ", fXInit[0], fXInit[1],fYInit[0], fYInit[1] ));
1819
1820 // Find save upper and lower limits
1821 icount = 0;
1822
1823 for (fSeg2[1]->FirstPad(fInput->DetElemId(),fXInit[0], fYInit[0], fZPlane, dpx, 0.);
1824 fSeg2[1]->MorePads(fInput->DetElemId());
1825 fSeg2[1]->NextPad(fInput->DetElemId()))
1826 {
1827 ix=fSeg2[1]->Ix(); iy=fSeg2[1]->Iy();
1828 // if (fDigitMap[1]->TestHit(ix, iy) == kEmpty) continue;
1829 fSeg2[1]->GetPadC(fInput->DetElemId(),ix,iy,upper[0],ydum,zdum);
1830 if (icount ==0) lower[0]=upper[0];
1831 icount++;
1832 }
1833 if (lower[0]>upper[0]) {xdum=lower[0]; lower[0]=upper[0]; upper[0]=xdum;}
1834 // vstart[0] = 0.5*(lower[0]+upper[0]);
1835
1836
1837 icount=0;
1838
1839 for (fSeg2[0]->FirstPad(fInput->DetElemId(),fXInit[0], fYInit[0], fZPlane, 0., dpy);
1840 fSeg2[0]->MorePads(fInput->DetElemId());
1841 fSeg2[0]->NextPad(fInput->DetElemId()))
1842 {
1843 ix=fSeg2[0]->Ix(); iy=fSeg2[0]->Iy();
1844 // if (fDigitMap[0]->TestHit(ix, iy) == kEmpty) continue;
1845 fSeg2[0]->GetPadC(fInput->DetElemId(),ix,iy,xdum,upper[1],zdum);
1846 if (icount ==0) lower[1]=upper[1];
1847 icount++;
1848 }
1849
1850 if (lower[1]>upper[1]) {xdum=lower[1]; lower[1]=upper[1]; upper[1]=xdum;}
1851 // vstart[1] = 0.5*(lower[1]+upper[1]);
1852
1853
1854 fSeg2[1]->GetPadI(fInput->DetElemId(),fXInit[1], fYInit[1], fZPlane, ix, iy);
1855 isec=fSeg2[1]->Sector(fInput->DetElemId(),ix, iy);
1856 dpx=fSeg2[1]->Dpx(fInput->DetElemId(),isec);
1857 fSeg2[0]->GetPadI(fInput->DetElemId(),fXInit[1], fYInit[1], fZPlane, ix, iy);
1858 isec=fSeg2[0]->Sector(fInput->DetElemId(),ix, iy);
1859 dpy=fSeg2[0]->Dpy(fInput->DetElemId(),isec);
1860
1861
1862 // Find save upper and lower limits
1863
1864 icount=0;
1865
1866 for (fSeg2[1]->FirstPad(fInput->DetElemId(),fXInit[1], fYInit[1], fZPlane, dpx, 0);
1867 fSeg2[1]->MorePads(fInput->DetElemId());
1868 fSeg2[1]->NextPad(fInput->DetElemId()))
1869 {
1870 ix=fSeg2[1]->Ix(); iy=fSeg2[1]->Iy();
1871 // if (fDigitMap[1]->TestHit(ix, iy) == kEmpty) continue;
1872 fSeg2[1]->GetPadC(fInput->DetElemId(),ix,iy,upper[2],ydum,zdum);
1873 if (icount ==0) lower[2]=upper[2];
1874 icount++;
1875 }
1876 if (lower[2]>upper[2]) {xdum=lower[2]; lower[2]=upper[2]; upper[2]=xdum;}
1877 // vstart[2] = 0.5*(lower[2]+upper[2]);
1878
1879 icount=0;
1880
1881 for (fSeg2[0]->FirstPad(fInput->DetElemId(),fXInit[1], fYInit[1], fZPlane, 0, dpy);
1882 fSeg2[0]-> MorePads(fInput->DetElemId());
1883 fSeg2[0]->NextPad(fInput->DetElemId()))
1884 {
1885 ix=fSeg2[0]->Ix(); iy=fSeg2[0]->Iy();
1886 // if (fDigitMap[0]->TestHit(ix, iy) != kEmpty) continue;
1887
1888 fSeg2[0]->GetPadC(fInput->DetElemId(),ix,iy,xdum,upper[3],zdum);
1889 if (icount ==0) lower[3]=upper[3];
1890 icount++;
1891
1892 }
1893 if (lower[3]>upper[3]) {xdum=lower[3]; lower[3]=upper[3]; upper[3]=xdum;}
1894
1895 lower[4]=0.;
1896 upper[4]=1.;
1897 lower[5]=0.;
1898 upper[5]=1.;
1899
1900// step sizes
1901 static Double_t step[6]={0.0005, 0.0005, 0.0005, 0.0005, 0.001, 0.001};
1902 clusterInput.Fitter()->mnparm(0,"x1",vstart[0],step[0],lower[0],upper[0],ierflag);
1903 clusterInput.Fitter()->mnparm(1,"y1",vstart[1],step[1],lower[1],upper[1],ierflag);
1904 clusterInput.Fitter()->mnparm(2,"x2",vstart[2],step[2],lower[2],upper[2],ierflag);
1905 clusterInput.Fitter()->mnparm(3,"y2",vstart[3],step[3],lower[3],upper[3],ierflag);
1906 clusterInput.Fitter()->mnparm(4,"a0",vstart[4],step[4],lower[4],upper[4],ierflag);
1907 clusterInput.Fitter()->mnparm(5,"a1",vstart[5],step[5],lower[5],upper[5],ierflag);
1908// ready for minimisation
1909 arglist[0]= -1;
1910 arglist[1]= 0;
1911
1912 clusterInput.Fitter()->mnexcm("SET NOGR", arglist, 0, ierflag);
1913 clusterInput.Fitter()->mnexcm("MIGRAD", arglist, 0, ierflag);
1914 // clusterInput.Fitter()->mnexcm("EXIT" , arglist, 0, ierflag);
1915// Get fitted parameters
1916 TString chname;
1917 Double_t epxz, b1, b2;
1918 Int_t ierflg;
1919 clusterInput.Fitter()->mnpout(0, chname, fXFit[0], epxz, b1, b2, ierflg);
1920 clusterInput.Fitter()->mnpout(1, chname, fYFit[0], epxz, b1, b2, ierflg);
1921 clusterInput.Fitter()->mnpout(2, chname, fXFit[1], epxz, b1, b2, ierflg);
1922 clusterInput.Fitter()->mnpout(3, chname, fYFit[1], epxz, b1, b2, ierflg);
1923 clusterInput.Fitter()->mnpout(4, chname, fQrFit[0], epxz, b1, b2, ierflg);
1924 clusterInput.Fitter()->mnpout(5, chname, fQrFit[1], epxz, b1, b2, ierflg);
1925
1926 Double_t fmin, fedm, errdef;
1927 Int_t npari, nparx, istat;
1928
1929 clusterInput.Fitter()->mnstat(fmin, fedm, errdef, npari, nparx, istat);
1930 fFitStat=istat;
1931
1932 fChi2[0]=fmin;
1933 fChi2[1]=fmin;
1934 return fmin;
1935}
1936
1937void AliMUONClusterFinderVS::Split(AliMUONRawCluster* c)
1938{
1939/// One cluster for each maximum
1940
1941 Int_t i, j, cath;
1942 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
1943 for (j=0; j<2; j++) {
1944 AliMUONRawCluster cnew;
1945 cnew.SetGhost(c->GetGhost());
1946 for (cath=0; cath<2; cath++) {
1947 cnew.SetChi2(cath,fChi2[0]);
1948 // ?? why not cnew.fChi2[cath]=fChi2[cath];
1949
1950 if (fNPeaks == 0) {
1951 cnew.SetNcluster(0,-1);
1952 cnew.SetNcluster(1,fNRawClusters);
1953 } else {
1954 cnew.SetNcluster(0,fNPeaks);
1955 cnew.SetNcluster(1,0);
1956 }
1957 cnew.SetMultiplicity(cath,0);
1958 cnew.SetX(cath, Float_t(fXFit[j]));
1959 cnew.SetY(cath, Float_t(fYFit[j]));
1960 cnew.SetZ(cath, fZPlane);
1961 if (j==0) {
1962 cnew.SetCharge(cath, Int_t(clusterInput.TotalCharge(cath)*fQrFit[cath]));
1963 } else {
1964 cnew.SetCharge(cath, Int_t(clusterInput.TotalCharge(cath)*(1-fQrFit[cath])));
1965 }
1966 fSeg2[cath]->SetHit(fInput->DetElemId(), fXFit[j],fYFit[j],fZPlane);
1967
1968 for (i=0; i<fMul[cath]; i++) {
1969 Float_t q1;
1970 cnew.SetIndex(cnew.GetMultiplicity(cath), cath, c->GetIndex(i,cath));
1971
1972 fSeg2[cath]->SetPad(fInput->DetElemId(),fIx[i][cath], fIy[i][cath]);
1973 q1 = fInput->Mathieson()->IntXY(fInput->DetElemId(),fSeg2[cath]);
1974
1975 cnew.SetContrib(i, cath, q1*Float_t(cnew.GetCharge(cath))/Float_t(fQ[i][cath]));
1976 cnew.SetMultiplicity(cath, cnew.GetMultiplicity(cath)+1 );
1977 }
1978 FillCluster(&cnew,0,cath);
1979 } // cathode loop
1980 cnew.SetClusterType(cnew.PhysicsContribution());
1981 if (cnew.GetCharge(0)>0 && cnew.GetCharge(1)>0) AddRawCluster(cnew);
1982 fNPeaks++;
1983 }
1984}
1985void AliMUONClusterFinderVS::AddRawCluster(AliMUONRawCluster& c)
1986{
1987/// Add a raw cluster copy to the list
1988
1989 // AliMUON *pMUON=(AliMUON*)gAlice->GetModule("MUON");
1990 // pMUON->GetMUONData()->AddRawCluster(fInput->Chamber(),c);
1991 // fNRawClusters++;
1992
1993 // Setting detection element in raw cluster for alignment
1994 // BB 19/05/05
1995 c.SetDetElemId(fInput->DetElemId());
1996
1997 TClonesArray &lrawcl = *fRawClusters;
1998 new(lrawcl[fNRawClusters++]) AliMUONRawCluster(c);
1999 AliDebug(1,Form("\nfNRawClusters %d\n",fNRawClusters));
2000}
2001
2002AliMUONClusterFinderVS& AliMUONClusterFinderVS
2003::operator = (const AliMUONClusterFinderVS& rhs)
2004{
2005// Protected assignement operator
2006
2007 if (this == &rhs) return *this;
2008
2009 AliFatal("Not implemented.");
2010
2011 return *this;
2012}
2013
2014//
2015// Minimisation functions
2016// Single Mathieson
2017void fcnS1(Int_t & /*npar*/, Double_t * /*gin*/, Double_t &f, Double_t *par, Int_t /*iflag*/)
2018{
2019 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
2020 Int_t i;
2021 Float_t delta;
2022 Float_t chisq=0;
2023 Float_t qcont=0;
2024 Float_t qtot=0;
2025
2026 for (i=0; i<clusterInput.Nmul(0); i++) {
2027 Float_t q0=clusterInput.Charge(i,0);
2028 Float_t q1=clusterInput.DiscrChargeS1(i,par);
2029 delta=(q0-q1)/q0;
2030 chisq+=delta*delta;
2031 qcont+=q1;
2032 qtot+=q0;
2033 }
2034 f=chisq;
2035}
2036
2037void fcnCombiS1(Int_t & /*npar*/, Double_t * /*gin*/, Double_t &f, Double_t *par, Int_t /*iflag*/)
2038{
2039 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
2040 Int_t i, cath;
2041 Float_t delta;
2042 Float_t chisq=0;
2043 Float_t qcont=0;
2044 Float_t qtot=0;
2045
2046 for (cath=0; cath<2; cath++) {
2047 for (i=0; i<clusterInput.Nmul(cath); i++) {
2048 Float_t q0=clusterInput.Charge(i,cath);
2049 Float_t q1=clusterInput.DiscrChargeCombiS1(i,par,cath);
2050 delta=(q0-q1)/q0;
2051 chisq+=delta*delta;
2052 qcont+=q1;
2053 qtot+=q0;
2054 }
2055 }
2056 f=chisq;
2057}
2058
2059// Double Mathieson
2060void fcnS2(Int_t & /*npar*/, Double_t * /*gin*/, Double_t &f, Double_t *par, Int_t /*iflag*/)
2061{
2062 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
2063 Int_t i;
2064 Float_t delta;
2065 Float_t chisq=0;
2066 Float_t qcont=0;
2067 Float_t qtot=0;
2068
2069 for (i=0; i<clusterInput.Nmul(0); i++) {
2070
2071 Float_t q0=clusterInput.Charge(i,0);
2072 Float_t q1=clusterInput.DiscrChargeS2(i,par);
2073 delta=(q0-q1)/q0;
2074 chisq+=delta*delta;
2075 qcont+=q1;
2076 qtot+=q0;
2077 }
2078 f=chisq;
2079}
2080
2081// Double Mathieson
2082void fcnCombiS2(Int_t & /*npar*/, Double_t * /*gin*/, Double_t &f, Double_t *par, Int_t /*iflag*/)
2083{
2084 AliMUONClusterInput& clusterInput = *(AliMUONClusterInput::Instance());
2085 Int_t i, cath;
2086 Float_t delta;
2087 Float_t chisq=0;
2088 Float_t qcont=0;
2089 Float_t qtot=0;
2090 for (cath=0; cath<2; cath++) {
2091 for (i=0; i<clusterInput.Nmul(cath); i++) {
2092 Float_t q0=clusterInput.Charge(i,cath);
2093 Float_t q1=clusterInput.DiscrChargeCombiS2(i,par,cath);
2094 delta=(q0-q1)/q0;
2095 chisq+=delta*delta;
2096 qcont+=q1;
2097 qtot+=q0;
2098 }
2099 }
2100 f=chisq;
2101}