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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/* History of cvs commits:
19 *
20 * $Log$
21 * Revision 1.59 2007/10/18 15:12:22 kharlov
22 * Moved MakePrimary to EMCRecPoint to rpduce correct order of primaries
23 *
24 * Revision 1.58 2007/04/16 09:03:37 kharlov
25 * Incedent angle correction fixed
26 *
27 * Revision 1.57 2007/04/05 10:18:58 policheh
28 * Introduced distance to nearest bad crystal.
29 *
30 * Revision 1.56 2007/03/06 06:47:28 kharlov
31 * DP:Possibility to use actual vertex position added
32 *
33 * Revision 1.55 2007/01/19 20:31:19 kharlov
34 * Improved formatting for Print()
35 */
36
37//_________________________________________________________________________
38// RecPoint implementation for PHOS-EMC
39// An EmcRecPoint is a cluster of digits
40//--
41//-- Author: Dmitri Peressounko (RRC KI & SUBATECH)
42
43
44// --- ROOT system ---
45#include "TH2.h"
46#include "TMath.h"
47#include "TCanvas.h"
48#include "TGraph.h"
49
50// --- Standard library ---
51
52// --- AliRoot header files ---
53#include "AliLog.h"
54#include "AliPHOSLoader.h"
55#include "AliGenerator.h"
56#include "AliPHOSGeometry.h"
57#include "AliPHOSDigit.h"
58#include "AliPHOSEmcRecPoint.h"
59#include "AliPHOSReconstructor.h"
60
61ClassImp(AliPHOSEmcRecPoint)
62
63//____________________________________________________________________________
64AliPHOSEmcRecPoint::AliPHOSEmcRecPoint() :
65 AliPHOSRecPoint(),
66 fCoreEnergy(0.), fDispersion(0.),
67 fEnergyList(0), fTime(-1.), fNExMax(0),
68 fM2x(0.), fM2z(0.), fM3x(0.), fM4z(0.),
69 fPhixe(0.), fDistToBadCrystal(-1),fDebug(0)
70{
71 // ctor
72 fMulDigit = 0 ;
73 fAmp = 0. ;
74 fLocPos.SetX(1000000.) ; //Local position should be evaluated
75
76 fLambda[0] = 0.;
77 fLambda[1] = 0.;
78
79}
80
81//____________________________________________________________________________
82AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const char * opt) :
83 AliPHOSRecPoint(opt),
84 fCoreEnergy(0.), fDispersion(0.),
85 fEnergyList(0), fTime(-1.), fNExMax(0),
86 fM2x(0.), fM2z(0.), fM3x(0.), fM4z(0.),
87 fPhixe(0.), fDistToBadCrystal(-1), fDebug(0)
88{
89 // ctor
90 fMulDigit = 0 ;
91 fAmp = 0. ;
92 fLocPos.SetX(1000000.) ; //Local position should be evaluated
93
94 fLambda[0] = 0.;
95 fLambda[1] = 0.;
96}
97
98//____________________________________________________________________________
99AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const AliPHOSEmcRecPoint & rp) :
100 AliPHOSRecPoint(rp),
101 fCoreEnergy(rp.fCoreEnergy), fDispersion(rp.fDispersion),
102 fEnergyList(0), fTime(rp.fTime), fNExMax(rp.fNExMax),
103 fM2x(rp.fM2x), fM2z(rp.fM2z), fM3x(rp.fM3x), fM4z(rp.fM4z),
104 fPhixe(rp.fPhixe), fDistToBadCrystal(rp.fDistToBadCrystal), fDebug(rp.fDebug)
105{
106 // cpy ctor
107 fMulDigit = rp.fMulDigit ;
108 fAmp = rp.fAmp ;
109 if (rp.fMulDigit>0) fEnergyList = new Float_t[rp.fMulDigit] ;
110 for(Int_t index = 0 ; index < fMulDigit ; index++)
111 fEnergyList[index] = rp.fEnergyList[index] ;
112
113 for(Int_t i=0; i<2; i++) {
114 fLambda[i] = rp.fLambda[i];
115 }
116}
117
118//____________________________________________________________________________
119AliPHOSEmcRecPoint::~AliPHOSEmcRecPoint()
120{
121 // dtor
122 if ( fEnergyList )
123 delete[] fEnergyList ;
124}
125
126//____________________________________________________________________________
127void AliPHOSEmcRecPoint::AddDigit(AliPHOSDigit & digit, Float_t Energy, Float_t time)
128{
129 // Adds a digit to the RecPoint
130 // and accumulates the total amplitude and the multiplicity
131
132 if(fEnergyList == 0)
133 fEnergyList = new Float_t[fMaxDigit];
134
135 if ( fMulDigit >= fMaxDigit ) { // increase the size of the lists
136 fMaxDigit*=2 ;
137 Int_t * tempo = new Int_t[fMaxDigit];
138 Float_t * tempoE = new Float_t[fMaxDigit];
139
140 Int_t index ;
141 for ( index = 0 ; index < fMulDigit ; index++ ){
142 tempo[index] = fDigitsList[index] ;
143 tempoE[index] = fEnergyList[index] ;
144 }
145
146 delete [] fDigitsList ;
147 fDigitsList = new Int_t[fMaxDigit];
148
149 delete [] fEnergyList ;
150 fEnergyList = new Float_t[fMaxDigit];
151
152 for ( index = 0 ; index < fMulDigit ; index++ ){
153 fDigitsList[index] = tempo[index] ;
154 fEnergyList[index] = tempoE[index] ;
155 }
156
157 delete [] tempo ;
158 delete [] tempoE ;
159 } // if
160
161 //time
162 Bool_t isMax=kTRUE ;
163 for(Int_t index = 0 ; index < fMulDigit ; index++ ){
164 if(fEnergyList[index]>Energy){
165 isMax=kFALSE ;
166 break ;
167 }
168 }
169 if(isMax){
170 fTime=time ;
171 }
172 //Alternative time calculation - still to be validated
173 // fTime = (fTime*fAmp + time*Energy)/(fAmp+Energy) ;
174
175 fDigitsList[fMulDigit] = digit.GetIndexInList() ;
176 fEnergyList[fMulDigit] = Energy ;
177 fMulDigit++ ;
178 fAmp += Energy ;
179 EvalPHOSMod(&digit) ;
180}
181
182//____________________________________________________________________________
183Bool_t AliPHOSEmcRecPoint::AreNeighbours(AliPHOSDigit * digit1, AliPHOSDigit * digit2 ) const
184{
185 // Tells if (true) or not (false) two digits are neighbors
186
187 Bool_t aren = kFALSE ;
188
189 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
190
191 Int_t relid1[4] ;
192 phosgeom->AbsToRelNumbering(digit1->GetId(), relid1) ;
193
194 Int_t relid2[4] ;
195 phosgeom->AbsToRelNumbering(digit2->GetId(), relid2) ;
196
197 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
198 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
199
200 if (( coldiff <= 1 ) && ( rowdiff <= 1 ) && (coldiff + rowdiff > 0))
201 aren = kTRUE ;
202
203 return aren ;
204}
205
206//____________________________________________________________________________
207Int_t AliPHOSEmcRecPoint::Compare(const TObject * obj) const
208{
209 // Compares two RecPoints according to their position in the PHOS modules
210
211 const Float_t delta = 1 ; //Width of "Sorting row". If you changibg this
212 //value (what is senseless) change as vell delta in
213 //AliPHOSTrackSegmentMakerv* and other RecPoints...
214 Int_t rv ;
215
216 AliPHOSEmcRecPoint * clu = (AliPHOSEmcRecPoint *)obj ;
217
218
219 Int_t phosmod1 = GetPHOSMod() ;
220 Int_t phosmod2 = clu->GetPHOSMod() ;
221
222 TVector3 locpos1;
223 GetLocalPosition(locpos1) ;
224 TVector3 locpos2;
225 clu->GetLocalPosition(locpos2) ;
226
227 if(phosmod1 == phosmod2 ) {
228 Int_t rowdif = (Int_t)TMath::Ceil(locpos1.X()/delta)-(Int_t)TMath::Ceil(locpos2.X()/delta) ;
229 if (rowdif> 0)
230 rv = 1 ;
231 else if(rowdif < 0)
232 rv = -1 ;
233 else if(locpos1.Z()>locpos2.Z())
234 rv = -1 ;
235 else
236 rv = 1 ;
237 }
238
239 else {
240 if(phosmod1 < phosmod2 )
241 rv = -1 ;
242 else
243 rv = 1 ;
244 }
245
246 return rv ;
247}
248//______________________________________________________________________________
249void AliPHOSEmcRecPoint::ExecuteEvent(Int_t event, Int_t, Int_t) /*const*/
250{
251
252 // Execute action corresponding to one event
253 // This member function is called when a AliPHOSRecPoint is clicked with the locator
254 //
255 // If Left button is clicked on AliPHOSRecPoint, the digits are switched on
256 // and switched off when the mouse button is released.
257
258
259 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
260
261 static TGraph * digitgraph = 0 ;
262
263 if (!gPad->IsEditable()) return;
264
265 TH2F * histo = 0 ;
266 TCanvas * histocanvas ;
267
268
269 //try to get run loader from default event folder
270 AliRunLoader* rn = AliRunLoader::GetRunLoader(AliConfig::GetDefaultEventFolderName());
271 if (rn == 0x0)
272 {
273 AliError(Form("Cannot find Run Loader in Default Event Folder"));
274 return;
275 }
276 AliPHOSLoader* phosLoader = dynamic_cast<AliPHOSLoader*>(rn->GetLoader("PHOSLoader"));
277 if (phosLoader == 0x0)
278 {
279 AliError(Form("Cannot find PHOS Loader from Run Loader"));
280 return;
281 }
282
283
284 const TClonesArray * digits = phosLoader->Digits() ;
285
286 switch (event) {
287
288 case kButton1Down: {
289 AliPHOSDigit * digit ;
290 Int_t iDigit;
291 Int_t relid[4] ;
292
293 const Int_t kMulDigit = AliPHOSEmcRecPoint::GetDigitsMultiplicity() ;
294 Float_t * xi = new Float_t[kMulDigit] ;
295 Float_t * zi = new Float_t[kMulDigit] ;
296
297 // create the histogram for the single cluster
298 // 1. gets histogram boundaries
299 Float_t ximax = -999. ;
300 Float_t zimax = -999. ;
301 Float_t ximin = 999. ;
302 Float_t zimin = 999. ;
303
304 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
305 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
306 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
307 phosgeom->RelPosInModule(relid, xi[iDigit], zi[iDigit]);
308 if ( xi[iDigit] > ximax )
309 ximax = xi[iDigit] ;
310 if ( xi[iDigit] < ximin )
311 ximin = xi[iDigit] ;
312 if ( zi[iDigit] > zimax )
313 zimax = zi[iDigit] ;
314 if ( zi[iDigit] < zimin )
315 zimin = zi[iDigit] ;
316 }
317 ximax += phosgeom->GetCrystalSize(0) / 2. ;
318 zimax += phosgeom->GetCrystalSize(2) / 2. ;
319 ximin -= phosgeom->GetCrystalSize(0) / 2. ;
320 zimin -= phosgeom->GetCrystalSize(2) / 2. ;
321 Int_t xdim = (int)( (ximax - ximin ) / phosgeom->GetCrystalSize(0) + 0.5 ) ;
322 Int_t zdim = (int)( (zimax - zimin ) / phosgeom->GetCrystalSize(2) + 0.5 ) ;
323
324 // 2. gets the histogram title
325
326 Text_t title[100] ;
327 snprintf(title,100,"Energy=%1.2f GeV ; Digits ; %d ", GetEnergy(), GetDigitsMultiplicity()) ;
328
329 if (!histo) {
330 delete histo ;
331 histo = 0 ;
332 }
333 histo = new TH2F("cluster3D", title, xdim, ximin, ximax, zdim, zimin, zimax) ;
334
335 Float_t x, z ;
336 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
337 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
338 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
339 phosgeom->RelPosInModule(relid, x, z);
340 histo->Fill(x, z, fEnergyList[iDigit] ) ;
341 }
342
343 if (!digitgraph) {
344 digitgraph = new TGraph(kMulDigit,xi,zi);
345 digitgraph-> SetMarkerStyle(5) ;
346 digitgraph-> SetMarkerSize(1.) ;
347 digitgraph-> SetMarkerColor(1) ;
348 digitgraph-> Paint("P") ;
349 }
350
351 // Print() ;
352 histocanvas = new TCanvas("cluster", "a single cluster", 600, 500) ;
353 histocanvas->Draw() ;
354 histo->Draw("lego1") ;
355
356 delete[] xi ;
357 delete[] zi ;
358
359 break;
360 }
361
362 case kButton1Up:
363 if (digitgraph) {
364 delete digitgraph ;
365 digitgraph = 0 ;
366 }
367 break;
368
369 }
370}
371
372//____________________________________________________________________________
373void AliPHOSEmcRecPoint::EvalDispersion(Float_t logWeight,TClonesArray * digits, TVector3 & /* vInc */)
374{
375 // Calculates the dispersion of the shower at the origine of the RecPoint
376 //DP: should we correct dispersion for non-perpendicular hit????????
377
378 Float_t d = 0. ;
379 Float_t wtot = 0. ;
380
381 Float_t x = 0.;
382 Float_t z = 0.;
383
384 AliPHOSDigit * digit ;
385
386 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
387
388 // Calculates the center of gravity in the local PHOS-module coordinates
389
390 Int_t iDigit;
391
392 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
393 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
394 Int_t relid[4] ;
395 Float_t xi ;
396 Float_t zi ;
397 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
398 phosgeom->RelPosInModule(relid, xi, zi);
399 if (fAmp>0 && fEnergyList[iDigit]>0) {
400 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
401 x += xi * w ;
402 z += zi * w ;
403 wtot += w ;
404 }
405 else
406 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
407 }
408 if (wtot>0) {
409 x /= wtot ;
410 z /= wtot ;
411 }
412 else
413 AliError(Form("Wrong weight %f\n", wtot));
414
415
416// Calculates the dispersion in coordinates
417 wtot = 0.;
418 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
419 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
420 Int_t relid[4] ;
421 Float_t xi ;
422 Float_t zi ;
423 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
424 phosgeom->RelPosInModule(relid, xi, zi);
425 if (fAmp>0 && fEnergyList[iDigit]>0) {
426 Float_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
427 d += w*((xi-x)*(xi-x) + (zi-z)*(zi-z) ) ;
428 wtot+=w ;
429 }
430 else
431 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
432 }
433
434
435 if (wtot>0) {
436 d /= wtot ;
437 }
438 else
439 AliError(Form("Wrong weight %f\n", wtot));
440
441 fDispersion = 0;
442 if (d>=0)
443 fDispersion = TMath::Sqrt(d) ;
444
445
446}
447//______________________________________________________________________________
448void AliPHOSEmcRecPoint::EvalCoreEnergy(Float_t logWeight, Float_t coreRadius, TClonesArray * digits)
449{
450 // This function calculates energy in the core,
451 // i.e. within a radius rad = 3cm around the center. Beyond this radius
452 // in accordance with shower profile the energy deposition
453 // should be less than 2%
454//DP: non-perpendicular incidence??????????????
455
456 Float_t x = 0 ;
457 Float_t z = 0 ;
458
459 AliPHOSDigit * digit ;
460
461 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
462
463 Int_t iDigit;
464
465// Calculates the center of gravity in the local PHOS-module coordinates
466 Float_t wtot = 0;
467 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
468 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
469 Int_t relid[4] ;
470 Float_t xi ;
471 Float_t zi ;
472 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
473 phosgeom->RelPosInModule(relid, xi, zi);
474 if (fAmp>0 && fEnergyList[iDigit]>0) {
475 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
476 x += xi * w ;
477 z += zi * w ;
478 wtot += w ;
479 }
480 else
481 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
482 }
483 if (wtot>0) {
484 x /= wtot ;
485 z /= wtot ;
486 }
487 else
488 AliError(Form("Wrong weight %f\n", wtot));
489
490
491 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
492 digit = (AliPHOSDigit *) ( digits->At(fDigitsList[iDigit]) ) ;
493 Int_t relid[4] ;
494 Float_t xi ;
495 Float_t zi ;
496 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
497 phosgeom->RelPosInModule(relid, xi, zi);
498 Float_t distance = TMath::Sqrt((xi-x)*(xi-x)+(zi-z)*(zi-z)) ;
499 if(distance < coreRadius)
500 fCoreEnergy += fEnergyList[iDigit] ;
501 }
502
503
504}
505
506//____________________________________________________________________________
507void AliPHOSEmcRecPoint::EvalElipsAxis(Float_t logWeight,TClonesArray * digits, TVector3 & /* vInc */)
508{
509 // Calculates the axis of the shower ellipsoid
510
511 Double_t wtot = 0. ;
512 Double_t x = 0.;
513 Double_t z = 0.;
514 Double_t dxx = 0.;
515 Double_t dzz = 0.;
516 Double_t dxz = 0.;
517
518 AliPHOSDigit * digit ;
519
520 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
521
522 Int_t iDigit;
523
524
525 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
526 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
527 Int_t relid[4] ;
528 Float_t xi ;
529 Float_t zi ;
530 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
531 phosgeom->RelPosInModule(relid, xi, zi);
532 if (fAmp>0 && fEnergyList[iDigit]>0) {
533 Double_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
534 dxx += w * xi * xi ;
535 x += w * xi ;
536 dzz += w * zi * zi ;
537 z += w * zi ;
538 dxz += w * xi * zi ;
539 wtot += w ;
540 }
541 else
542 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
543 }
544 if (wtot>0) {
545 dxx /= wtot ;
546 x /= wtot ;
547 dxx -= x * x ;
548 dzz /= wtot ;
549 z /= wtot ;
550 dzz -= z * z ;
551 dxz /= wtot ;
552 dxz -= x * z ;
553
554// //Apply correction due to non-perpendicular incidence
555// Double_t CosX ;
556// Double_t CosZ ;
557// AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
558// Double_t DistanceToIP= (Double_t ) phosgeom->GetIPtoCrystalSurface() ;
559
560// CosX = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+x*x) ;
561// CosZ = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+z*z) ;
562
563// dxx = dxx/(CosX*CosX) ;
564// dzz = dzz/(CosZ*CosZ) ;
565// dxz = dxz/(CosX*CosZ) ;
566
567
568 fLambda[0] = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
569 if(fLambda[0] > 0)
570 fLambda[0] = TMath::Sqrt(fLambda[0]) ;
571
572 fLambda[1] = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
573 if(fLambda[1] > 0) //To avoid exception if numerical errors lead to negative lambda.
574 fLambda[1] = TMath::Sqrt(fLambda[1]) ;
575 else
576 fLambda[1]= 0. ;
577 }
578 else {
579 AliError(Form("Wrong weight %f\n", wtot));
580 fLambda[0]=fLambda[1]=0.;
581 }
582}
583
584//____________________________________________________________________________
585void AliPHOSEmcRecPoint::EvalMoments(Float_t logWeight,TClonesArray * digits, TVector3 & /* vInc */)
586{
587 // Calculate the shower moments in the eigen reference system
588 // M2x, M2z, M3x, M4z
589 // Calculate the angle between the shower position vector and the eigen vector
590
591 Double_t wtot = 0. ;
592 Double_t x = 0.;
593 Double_t z = 0.;
594 Double_t dxx = 0.;
595 Double_t dzz = 0.;
596 Double_t dxz = 0.;
597 Double_t lambda0=0, lambda1=0;
598
599 AliPHOSDigit * digit ;
600
601 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
602
603 Int_t iDigit;
604
605 // 1) Find covariance matrix elements:
606 // || dxx dxz ||
607 // || dxz dzz ||
608
609 Float_t xi ;
610 Float_t zi ;
611 Int_t relid[4] ;
612 Double_t w;
613 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
614 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
615 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
616 phosgeom->RelPosInModule(relid, xi, zi);
617 if (fAmp>0 && fEnergyList[iDigit]>0) {
618 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
619 x += w * xi ;
620 z += w * zi ;
621 dxx += w * xi * xi ;
622 dzz += w * zi * zi ;
623 dxz += w * xi * zi ;
624 wtot += w ;
625 }
626 else
627 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
628
629 }
630 if (wtot>0) {
631 x /= wtot ;
632 z /= wtot ;
633 dxx /= wtot ;
634 dzz /= wtot ;
635 dxz /= wtot ;
636 dxx -= x * x ;
637 dzz -= z * z ;
638 dxz -= x * z ;
639
640 // 2) Find covariance matrix eigen values lambda0 and lambda1
641
642 lambda0 = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
643 lambda1 = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
644 }
645 else {
646 AliError(Form("Wrong weight %f\n", wtot));
647 lambda0=lambda1=0.;
648 }
649
650 // 3) Find covariance matrix eigen vectors e0 and e1
651
652 TVector2 e0,e1;
653 if (dxz != 0)
654 e0.Set(1.,(lambda0-dxx)/dxz);
655 else
656 e0.Set(0.,1.);
657
658 e0 = e0.Unit();
659 e1.Set(-e0.Y(),e0.X());
660
661 // 4) Rotate cluster tensor from (x,z) to (e0,e1) system
662 // and calculate moments M3x and M4z
663
664 Float_t cosPhi = e0.X();
665 Float_t sinPhi = e0.Y();
666
667 Float_t xiPHOS ;
668 Float_t ziPHOS ;
669 Double_t dx3, dz3, dz4;
670 wtot = 0.;
671 x = 0.;
672 z = 0.;
673 dxx = 0.;
674 dzz = 0.;
675 dxz = 0.;
676 dx3 = 0.;
677 dz3 = 0.;
678 dz4 = 0.;
679 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
680 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
681 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
682 phosgeom->RelPosInModule(relid, xiPHOS, ziPHOS);
683 xi = xiPHOS*cosPhi + ziPHOS*sinPhi;
684 zi = ziPHOS*cosPhi - xiPHOS*sinPhi;
685 if (fAmp>0 && fEnergyList[iDigit]>0) {
686 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
687 x += w * xi ;
688 z += w * zi ;
689 dxx += w * xi * xi ;
690 dzz += w * zi * zi ;
691 dxz += w * xi * zi ;
692 dx3 += w * xi * xi * xi;
693 dz3 += w * zi * zi * zi ;
694 dz4 += w * zi * zi * zi * zi ;
695 wtot += w ;
696 }
697 else
698 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
699 }
700 if (wtot>0) {
701 x /= wtot ;
702 z /= wtot ;
703 dxx /= wtot ;
704 dzz /= wtot ;
705 dxz /= wtot ;
706 dx3 /= wtot ;
707 dz3 /= wtot ;
708 dz4 /= wtot ;
709 dx3 += -3*dxx*x + 2*x*x*x;
710 dz4 += -4*dz3*z + 6*dzz*z*z -3*z*z*z*z;
711 dxx -= x * x ;
712 dzz -= z * z ;
713 dxz -= x * z ;
714 }
715 else
716 AliError(Form("Wrong weight %f\n", wtot));
717
718 // 5) Find an angle between cluster center vector and eigen vector e0
719
720 Float_t phi = 0;
721 if ( (x*x+z*z) > 0 )
722 phi = TMath::ACos ((x*e0.X() + z*e0.Y()) / sqrt(x*x + z*z));
723
724 fM2x = lambda0;
725 fM2z = lambda1;
726 fM3x = dx3;
727 fM4z = dz4;
728 fPhixe = phi;
729
730}
731//______________________________________________________________________________
732void AliPHOSEmcRecPoint::EvalPrimaries(TClonesArray * digits)
733{
734 // Constructs the list of primary particles (tracks) which have contributed to this RecPoint
735
736 AliPHOSDigit * digit ;
737 Int_t * tempo = new Int_t[fMaxTrack] ;
738
739 //First find digit with maximal energy deposition and copy its primaries
740 Float_t emax=0.;
741 Int_t imaxDigit=0;
742 for(Int_t id=0; id<GetDigitsMultiplicity(); id++){
743 if(emax<fEnergyList[id])
744 imaxDigit=id ;
745 }
746 digit = static_cast<AliPHOSDigit *>(digits->At( fDigitsList[imaxDigit] )) ;
747 Int_t nprimaries = digit->GetNprimary() ;
748 if ( nprimaries > fMaxTrack ) {
749 fMulTrack = - 1 ;
750 Error("EvalPrimaries", "GetNprimaries ERROR > increase fMaxTrack" ) ;
751 nprimaries = fMaxTrack; //skip the rest
752 }
753 for(fMulTrack=0; fMulTrack<nprimaries ; fMulTrack++){
754 tempo[fMulTrack] = digit->GetPrimary(fMulTrack+1) ;
755 }
756
757 //Now add other digits contributions
758 for (Int_t index = 0 ; index < GetDigitsMultiplicity() ; index++ ) { // all digits
759 if(index==imaxDigit) //already in
760 continue ;
761 digit = static_cast<AliPHOSDigit *>(digits->At( fDigitsList[index] )) ;
762 nprimaries = digit->GetNprimary() ;
763 for(Int_t ipr=0; ipr<nprimaries; ipr++){
764 Int_t iprimary = digit->GetPrimary(ipr+1) ;
765 Bool_t notIn=1 ;
766 for(Int_t kndex = 0 ; (kndex < fMulTrack)&& notIn ; kndex++ ) { //check if not already stored
767 if(iprimary == tempo[kndex]){
768 notIn = kFALSE ;
769 }
770 }
771 if(notIn){
772 if(fMulTrack<fMaxTrack){
773 tempo[fMulTrack]=iprimary ;
774 fMulTrack++ ;
775 }
776 else{
777 Error("EvalPrimaries", "GetNprimaries ERROR > increase fMaxTrack!!!" ) ;
778 break ;
779 }
780 }
781 }
782 } // all digits
783 if(fMulTrack > 0){
784 if(fTracksList)delete [] fTracksList;
785 fTracksList = new Int_t[fMulTrack] ;
786 }
787 for(Int_t index = 0; index < fMulTrack; index++)
788 fTracksList[index] = tempo[index] ;
789
790 delete [] tempo ;
791
792}
793
794//____________________________________________________________________________
795void AliPHOSEmcRecPoint::EvalAll(TClonesArray * digits )
796{
797// EvalCoreEnergy(logWeight, digits);
798 EvalTime(digits) ;
799 EvalPrimaries(digits) ;
800 AliPHOSRecPoint::EvalAll(digits) ;
801}
802//____________________________________________________________________________
803void AliPHOSEmcRecPoint::EvalAll(Float_t logWeight, TVector3 &vtx, TClonesArray * digits )
804{
805 // Evaluates all shower parameters
806 TVector3 vInc ;
807 EvalLocalPosition(logWeight, vtx, digits,vInc) ;
808 EvalElipsAxis(logWeight, digits, vInc) ; //they are evaluated with momenta
809 EvalMoments(logWeight, digits, vInc) ;
810 EvalDispersion(logWeight, digits, vInc) ;
811}
812//____________________________________________________________________________
813void AliPHOSEmcRecPoint::EvalLocalPosition(Float_t logWeight, TVector3 &vtx, TClonesArray * digits, TVector3 &vInc)
814{
815 // Calculates the center of gravity in the local PHOS-module coordinates
816 Float_t wtot = 0. ;
817
818 Int_t relid[4] ;
819
820 Float_t x = 0. ;
821 Float_t z = 0. ;
822
823 AliPHOSDigit * digit ;
824
825 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
826
827 Int_t iDigit;
828
829 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
830 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
831
832 Float_t xi ;
833 Float_t zi ;
834 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
835 phosgeom->RelPosInModule(relid, xi, zi);
836 if (fAmp>0 && fEnergyList[iDigit]>0) {
837 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
838 x += xi * w ;
839 z += zi * w ;
840 wtot += w ;
841 }
842 else
843 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
844 }
845 if (wtot>0) {
846 x /= wtot ;
847 z /= wtot ;
848 }
849 else
850 AliError(Form("Wrong weight %f\n", wtot));
851
852 // Correction for the depth of the shower starting point (TDR p 127)
853 Float_t para = 0.925 ;
854 Float_t parb = 6.52 ;
855
856 phosgeom->GetIncidentVector(vtx,GetPHOSMod(),x,z,vInc) ;
857
858 Float_t depthx = 0.;
859 Float_t depthz = 0.;
860 if (fAmp>0&&vInc.Y()!=0.) {
861 depthx = ( para * TMath::Log(fAmp) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ;
862 depthz = ( para * TMath::Log(fAmp) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ;
863 }
864 else
865 AliError(Form("Wrong amplitude %f\n", fAmp));
866
867 fLocPos.SetX(x - depthx) ;
868 fLocPos.SetY(0.) ;
869 fLocPos.SetZ(z - depthz) ;
870
871}
872
873//____________________________________________________________________________
874Float_t AliPHOSEmcRecPoint::GetMaximalEnergy(void) const
875{
876 // Finds the maximum energy in the cluster
877
878 Float_t menergy = 0. ;
879
880 Int_t iDigit;
881
882 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
883
884 if(fEnergyList[iDigit] > menergy)
885 menergy = fEnergyList[iDigit] ;
886 }
887 return menergy ;
888}
889
890//____________________________________________________________________________
891Int_t AliPHOSEmcRecPoint::GetMultiplicityAtLevel(Float_t H) const
892{
893 // Calculates the multiplicity of digits with energy larger than H*energy
894
895 Int_t multipl = 0 ;
896 Int_t iDigit ;
897 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
898
899 if(fEnergyList[iDigit] > H * fAmp)
900 multipl++ ;
901 }
902 return multipl ;
903}
904
905//____________________________________________________________________________
906Int_t AliPHOSEmcRecPoint::GetNumberOfLocalMax( AliPHOSDigit ** maxAt, Float_t * maxAtEnergy,
907 Float_t locMaxCut,TClonesArray * digits) const
908{
909 // Calculates the number of local maxima in the cluster using fLocalMaxCut as the minimum
910 // energy difference between two local maxima
911
912 AliPHOSDigit * digit ;
913 AliPHOSDigit * digitN ;
914
915
916 Int_t iDigitN ;
917 Int_t iDigit ;
918
919 for(iDigit = 0; iDigit < fMulDigit; iDigit++)
920 maxAt[iDigit] = (AliPHOSDigit*) digits->At(fDigitsList[iDigit]) ;
921
922
923 for(iDigit = 0 ; iDigit < fMulDigit; iDigit++) {
924 if(maxAt[iDigit]) {
925 digit = maxAt[iDigit] ;
926
927 for(iDigitN = 0; iDigitN < fMulDigit; iDigitN++) {
928 if(iDigit == iDigitN)
929 continue ;
930
931 digitN = (AliPHOSDigit *) digits->At(fDigitsList[iDigitN]) ;
932
933 if ( AreNeighbours(digit, digitN) ) {
934 if (fEnergyList[iDigit] > fEnergyList[iDigitN] ) {
935 maxAt[iDigitN] = 0 ;
936 // but may be digit too is not local max ?
937 if(fEnergyList[iDigit] < fEnergyList[iDigitN] + locMaxCut)
938 maxAt[iDigit] = 0 ;
939 }
940 else {
941 maxAt[iDigit] = 0 ;
942 // but may be digitN too is not local max ?
943 if(fEnergyList[iDigit] > fEnergyList[iDigitN] - locMaxCut)
944 maxAt[iDigitN] = 0 ;
945 }
946 } // if Areneighbours
947 } // while digitN
948 } // slot not empty
949 } // while digit
950
951 iDigitN = 0 ;
952 for(iDigit = 0; iDigit < fMulDigit; iDigit++) {
953 if(maxAt[iDigit]){
954 maxAt[iDigitN] = maxAt[iDigit] ;
955 maxAtEnergy[iDigitN] = fEnergyList[iDigit] ;
956 iDigitN++ ;
957 }
958 }
959 return iDigitN ;
960}
961//____________________________________________________________________________
962void AliPHOSEmcRecPoint::EvalTime(TClonesArray * /*digits*/)
963{
964 // Define a rec.point time as a time in the cell with the maximum energy
965 //Time already evaluated during AddDigit()
966
967/*
968 Float_t maxE = 0;
969 Int_t maxAt = 0;
970 for(Int_t idig=0; idig < fMulDigit; idig++){
971 if(fEnergyList[idig] > maxE){
972 maxE = fEnergyList[idig] ;
973 maxAt = idig;
974 }
975 }
976 fTime = ((AliPHOSDigit*) digits->At(fDigitsList[maxAt]))->GetTime() ;
977*/
978}
979//____________________________________________________________________________
980void AliPHOSEmcRecPoint::Purify(Float_t threshold, const TClonesArray * digits){
981 //Removes digits below threshold
982
983 Int_t tempo[fMaxDigit];
984 Float_t tempoE[fMaxDigit];
985
986 Int_t mult = 0 ;
987 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
988 if(fEnergyList[iDigit] > threshold){
989 tempo[mult] = fDigitsList[iDigit] ;
990 tempoE[mult] = fEnergyList[iDigit] ;
991 mult++ ;
992 }
993 }
994
995 if(mult==0){ //too soft cluster
996 fMulDigit =0 ;
997 fAmp = 0.; //Recalculate total energy
998 }
999
1000 //Remove non-connected cells
1001 Int_t index[mult] ;
1002 Bool_t used[mult] ;
1003 for(Int_t i=0; i<mult; i++) used[i]=0 ;
1004 Int_t inClu=0 ;
1005 Double_t eMax=0. ;
1006 //find maximum
1007 for(Int_t iDigit=0; iDigit<mult; iDigit++) {
1008 if(eMax<tempoE[iDigit]){
1009 eMax=tempoE[iDigit];
1010 index[0]=iDigit ;
1011 inClu=1 ;
1012 }
1013 }
1014 if(mult>0)
1015 used[index[0]]=kTRUE ; //mark as used
1016 for(Int_t i=0; i<inClu; i++){
1017 AliPHOSDigit * digit = (AliPHOSDigit *) digits->At(tempo[index[i]]) ;
1018 for(Int_t iDigit=0 ;iDigit<mult; iDigit++){
1019 if(used[iDigit]) //already used
1020 continue ;
1021 AliPHOSDigit * digitN = (AliPHOSDigit *) digits->At(tempo[iDigit]) ;
1022 if(AreNeighbours(digit,digitN)){
1023 index[inClu]= iDigit ;
1024 inClu++ ;
1025 used[iDigit]=kTRUE ;
1026 }
1027 }
1028 }
1029
1030 fMulDigit = inClu ;
1031 delete [] fDigitsList ;
1032 delete [] fEnergyList ;
1033 fDigitsList = new Int_t[fMulDigit];
1034 fEnergyList = new Float_t[fMulDigit];
1035
1036 fAmp = 0.; //Recalculate total energy
1037 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
1038 fDigitsList[iDigit] = tempo[index[iDigit]];
1039 fEnergyList[iDigit] = tempoE[index[iDigit]] ;
1040 fAmp+=tempoE[index[iDigit]];
1041 }
1042}
1043//____________________________________________________________________________
1044void AliPHOSEmcRecPoint::Print(Option_t *) const
1045{
1046 // Print the list of digits belonging to the cluster
1047
1048 TString message ;
1049 message = "AliPHOSEmcRecPoint:\n" ;
1050 message += "Digit multiplicity = %d" ;
1051 message += ", cluster Energy = %f" ;
1052 message += ", number of primaries = %d" ;
1053 message += ", rec.point index = %d \n" ;
1054 printf(message.Data(), fMulDigit, fAmp, fMulTrack,GetIndexInList() ) ;
1055
1056 Int_t iDigit;
1057 printf(" digits ids = ") ;
1058 for(iDigit=0; iDigit<fMulDigit; iDigit++)
1059 printf(" %d ", fDigitsList[iDigit] ) ;
1060
1061 printf("\n digit energies = ") ;
1062 for(iDigit=0; iDigit<fMulDigit; iDigit++)
1063 printf(" %f ", fEnergyList[iDigit] ) ;
1064
1065 printf("\n digit primaries ") ;
1066 if (fMulTrack<1) printf("... no primaries");
1067 for(iDigit = 0;iDigit < fMulTrack; iDigit++)
1068 printf(" %d ", fTracksList[iDigit]) ;
1069 printf("\n") ;
1070
1071}
1072
1073