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[u/mrichter/AliRoot.git] / PHOS / AliPHOSEmcRecPoint.cxx
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d15a28e7 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
b2a60966 16/* $Id$ */
17
702ab87e 18/* History of cvs commits:
19 *
20 * $Log$
21 */
22
d15a28e7 23//_________________________________________________________________________
b2a60966 24// RecPoint implementation for PHOS-EMC
25// An EmcRecPoint is a cluster of digits
baef0810 26//*--
b2a60966 27//*-- Author: Dmitri Peressounko (RRC KI & SUBATECH)
28
d15a28e7 29
30// --- ROOT system ---
9f616d61 31#include "TH2.h"
d15a28e7 32#include "TMath.h"
9f616d61 33#include "TCanvas.h"
55fe9d13 34#include "TGraph.h"
d15a28e7 35
36// --- Standard library ---
37
d15a28e7 38// --- AliRoot header files ---
351dd634 39#include "AliLog.h"
e957fea8 40#include "AliPHOSLoader.h"
88cb7938 41#include "AliGenerator.h"
d15a28e7 42#include "AliPHOSGeometry.h"
e957fea8 43#include "AliPHOSDigit.h"
d15a28e7 44#include "AliPHOSEmcRecPoint.h"
e957fea8 45
d15a28e7 46ClassImp(AliPHOSEmcRecPoint)
47
48//____________________________________________________________________________
7932f811 49AliPHOSEmcRecPoint::AliPHOSEmcRecPoint() : AliPHOSRecPoint()
d15a28e7 50{
51 // ctor
52
53 fMulDigit = 0 ;
54 fAmp = 0. ;
7932f811 55 fCoreEnergy = 0 ;
56 fEnergyList = 0 ;
94256c23 57 fNExMax = 0 ; //Not unfolded yet
9688c1dd 58 fTime = -1. ;
a6eedfad 59 fLocPos.SetX(1000000.) ; //Local position should be evaluated
ce2a9a95 60 fDebug=0;
7b7c1533 61
83974468 62}
63
64//____________________________________________________________________________
73a68ccb 65AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const char * opt) : AliPHOSRecPoint(opt)
66{
67 // ctor
68
69 fMulDigit = 0 ;
70 fAmp = 0. ;
94256c23 71 fNExMax = 0 ; //Not unfolded yet
73a68ccb 72 fCoreEnergy = 0 ;
73 fEnergyList = 0 ;
74 fTime = -1. ;
75 fLocPos.SetX(1000000.) ; //Local position should be evaluated
ce2a9a95 76 fDebug=0;
73a68ccb 77
78}
79
80//____________________________________________________________________________
55fe9d13 81AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const AliPHOSEmcRecPoint & rp) : AliPHOSRecPoint(rp)
82{
83 // cpy ctor
84
85 fMulDigit = rp.fMulDigit ;
86 fAmp = rp.fAmp ;
87 fCoreEnergy = rp.fCoreEnergy ;
88 fEnergyList = new Float_t[rp.fMulDigit] ;
89 Int_t index ;
90 for(index = 0 ; index < fMulDigit ; index++)
91 fEnergyList[index] = rp.fEnergyList[index] ;
92 fNExMax = rp.fNExMax ;
93 fTime = rp.fTime ;
94}
95
96//____________________________________________________________________________
83974468 97AliPHOSEmcRecPoint::~AliPHOSEmcRecPoint()
98{
88714635 99 // dtor
a4e98857 100
83974468 101 if ( fEnergyList )
102 delete[] fEnergyList ;
d15a28e7 103}
104
9f616d61 105//____________________________________________________________________________
83974468 106void AliPHOSEmcRecPoint::AddDigit(AliPHOSDigit & digit, Float_t Energy)
d15a28e7 107{
b2a60966 108 // Adds a digit to the RecPoint
a4e98857 109 // and accumulates the total amplitude and the multiplicity
d15a28e7 110
7932f811 111 if(fEnergyList == 0)
112 fEnergyList = new Float_t[fMaxDigit];
113
d15a28e7 114 if ( fMulDigit >= fMaxDigit ) { // increase the size of the lists
9f616d61 115 fMaxDigit*=2 ;
0fbb8738 116 Int_t * tempo = new Int_t[fMaxDigit];
117 Float_t * tempoE = new Float_t[fMaxDigit];
9f616d61 118
119 Int_t index ;
d15a28e7 120 for ( index = 0 ; index < fMulDigit ; index++ ){
83974468 121 tempo[index] = fDigitsList[index] ;
d15a28e7 122 tempoE[index] = fEnergyList[index] ;
123 }
124
9f616d61 125 delete [] fDigitsList ;
0fbb8738 126 fDigitsList = new Int_t[fMaxDigit];
9f616d61 127
128 delete [] fEnergyList ;
0fbb8738 129 fEnergyList = new Float_t[fMaxDigit];
9f616d61 130
131 for ( index = 0 ; index < fMulDigit ; index++ ){
132 fDigitsList[index] = tempo[index] ;
133 fEnergyList[index] = tempoE[index] ;
134 }
135
136 delete [] tempo ;
137 delete [] tempoE ;
138 } // if
d15a28e7 139
83974468 140 fDigitsList[fMulDigit] = digit.GetIndexInList() ;
141 fEnergyList[fMulDigit] = Energy ;
142 fMulDigit++ ;
d15a28e7 143 fAmp += Energy ;
7932f811 144
145 EvalPHOSMod(&digit) ;
d15a28e7 146}
147
148//____________________________________________________________________________
ad8cfaf4 149Bool_t AliPHOSEmcRecPoint::AreNeighbours(AliPHOSDigit * digit1, AliPHOSDigit * digit2 ) const
d15a28e7 150{
a4e98857 151 // Tells if (true) or not (false) two digits are neighbors
d15a28e7 152
153 Bool_t aren = kFALSE ;
154
686b771f 155 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
7b7c1533 156
d15a28e7 157 Int_t relid1[4] ;
92862013 158 phosgeom->AbsToRelNumbering(digit1->GetId(), relid1) ;
d15a28e7 159
160 Int_t relid2[4] ;
92862013 161 phosgeom->AbsToRelNumbering(digit2->GetId(), relid2) ;
d15a28e7 162
92862013 163 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
164 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
d15a28e7 165
92862013 166 if (( coldiff <= 1 ) && ( rowdiff <= 1 ) && (coldiff + rowdiff > 0))
d15a28e7 167 aren = kTRUE ;
168
169 return aren ;
170}
171
172//____________________________________________________________________________
2a941f4e 173Int_t AliPHOSEmcRecPoint::Compare(const TObject * obj) const
d15a28e7 174{
b2a60966 175 // Compares two RecPoints according to their position in the PHOS modules
686b771f 176
177 const Float_t delta = 1 ; //Width of "Sorting row". If you changibg this
7932f811 178 //value (what is senseless) change as vell delta in
179 //AliPHOSTrackSegmentMakerv* and other RecPoints...
d15a28e7 180 Int_t rv ;
181
182 AliPHOSEmcRecPoint * clu = (AliPHOSEmcRecPoint *)obj ;
183
184
ad8cfaf4 185 Int_t phosmod1 = GetPHOSMod() ;
92862013 186 Int_t phosmod2 = clu->GetPHOSMod() ;
d15a28e7 187
92862013 188 TVector3 locpos1;
7932f811 189 GetLocalPosition(locpos1) ;
92862013 190 TVector3 locpos2;
191 clu->GetLocalPosition(locpos2) ;
d15a28e7 192
92862013 193 if(phosmod1 == phosmod2 ) {
7932f811 194 Int_t rowdif = (Int_t)TMath::Ceil(locpos1.X()/delta)-(Int_t)TMath::Ceil(locpos2.X()/delta) ;
d15a28e7 195 if (rowdif> 0)
7932f811 196 rv = 1 ;
d15a28e7 197 else if(rowdif < 0)
7932f811 198 rv = -1 ;
92862013 199 else if(locpos1.Z()>locpos2.Z())
d15a28e7 200 rv = -1 ;
201 else
202 rv = 1 ;
203 }
204
205 else {
92862013 206 if(phosmod1 < phosmod2 )
d15a28e7 207 rv = -1 ;
208 else
209 rv = 1 ;
210 }
211
212 return rv ;
213}
9f616d61 214//______________________________________________________________________________
702ab87e 215void AliPHOSEmcRecPoint::ExecuteEvent(Int_t event, Int_t, Int_t) /*const*/
9f616d61 216{
9f616d61 217
9688c1dd 218 // Execute action corresponding to one event
219 // This member function is called when a AliPHOSRecPoint is clicked with the locator
220 //
221 // If Left button is clicked on AliPHOSRecPoint, the digits are switched on
222 // and switched off when the mouse button is released.
223
88cb7938 224
686b771f 225 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
83974468 226
9688c1dd 227 static TGraph * digitgraph = 0 ;
83974468 228
9688c1dd 229 if (!gPad->IsEditable()) return;
83974468 230
9688c1dd 231 TH2F * histo = 0 ;
232 TCanvas * histocanvas ;
233
88cb7938 234
235 //try to get run loader from default event folder
e191bb57 236 AliRunLoader* rn = AliRunLoader::GetRunLoader(AliConfig::GetDefaultEventFolderName());
88cb7938 237 if (rn == 0x0)
238 {
351dd634 239 AliError(Form("Cannot find Run Loader in Default Event Folder"));
88cb7938 240 return;
241 }
242 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(rn->GetLoader("PHOSLoader"));
243 if (gime == 0x0)
244 {
351dd634 245 AliError(Form("Cannot find PHOS Loader from Run Loader"));
88cb7938 246 return;
247 }
248
249
afa51c4e 250 const TClonesArray * digits = gime->Digits() ;
9688c1dd 251
252 switch (event) {
83974468 253
9688c1dd 254 case kButton1Down: {
255 AliPHOSDigit * digit ;
256 Int_t iDigit;
257 Int_t relid[4] ;
83974468 258
9688c1dd 259 const Int_t kMulDigit = AliPHOSEmcRecPoint::GetDigitsMultiplicity() ;
260 Float_t * xi = new Float_t[kMulDigit] ;
261 Float_t * zi = new Float_t[kMulDigit] ;
83974468 262
9688c1dd 263 // create the histogram for the single cluster
264 // 1. gets histogram boundaries
265 Float_t ximax = -999. ;
266 Float_t zimax = -999. ;
267 Float_t ximin = 999. ;
268 Float_t zimin = 999. ;
83974468 269
9688c1dd 270 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
271 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
272 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
273 phosgeom->RelPosInModule(relid, xi[iDigit], zi[iDigit]);
274 if ( xi[iDigit] > ximax )
275 ximax = xi[iDigit] ;
276 if ( xi[iDigit] < ximin )
277 ximin = xi[iDigit] ;
278 if ( zi[iDigit] > zimax )
279 zimax = zi[iDigit] ;
280 if ( zi[iDigit] < zimin )
281 zimin = zi[iDigit] ;
282 }
283 ximax += phosgeom->GetCrystalSize(0) / 2. ;
284 zimax += phosgeom->GetCrystalSize(2) / 2. ;
285 ximin -= phosgeom->GetCrystalSize(0) / 2. ;
286 zimin -= phosgeom->GetCrystalSize(2) / 2. ;
287 Int_t xdim = (int)( (ximax - ximin ) / phosgeom->GetCrystalSize(0) + 0.5 ) ;
288 Int_t zdim = (int)( (zimax - zimin ) / phosgeom->GetCrystalSize(2) + 0.5 ) ;
83974468 289
9688c1dd 290 // 2. gets the histogram title
83974468 291
9688c1dd 292 Text_t title[100] ;
293 sprintf(title,"Energy=%1.2f GeV ; Digits ; %d ", GetEnergy(), GetDigitsMultiplicity()) ;
83974468 294
9688c1dd 295 if (!histo) {
296 delete histo ;
297 histo = 0 ;
298 }
299 histo = new TH2F("cluster3D", title, xdim, ximin, ximax, zdim, zimin, zimax) ;
83974468 300
9688c1dd 301 Float_t x, z ;
302 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
303 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
304 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
305 phosgeom->RelPosInModule(relid, x, z);
306 histo->Fill(x, z, fEnergyList[iDigit] ) ;
307 }
83974468 308
9688c1dd 309 if (!digitgraph) {
310 digitgraph = new TGraph(kMulDigit,xi,zi);
311 digitgraph-> SetMarkerStyle(5) ;
312 digitgraph-> SetMarkerSize(1.) ;
313 digitgraph-> SetMarkerColor(1) ;
314 digitgraph-> Paint("P") ;
315 }
83974468 316
9688c1dd 317 // Print() ;
318 histocanvas = new TCanvas("cluster", "a single cluster", 600, 500) ;
319 histocanvas->Draw() ;
320 histo->Draw("lego1") ;
83974468 321
9688c1dd 322 delete[] xi ;
323 delete[] zi ;
83974468 324
9688c1dd 325 break;
326 }
83974468 327
9688c1dd 328 case kButton1Up:
329 if (digitgraph) {
330 delete digitgraph ;
331 digitgraph = 0 ;
332 }
333 break;
9f616d61 334
9688c1dd 335 }
9f616d61 336}
337
d15a28e7 338//____________________________________________________________________________
7932f811 339void AliPHOSEmcRecPoint::EvalDispersion(Float_t logWeight,TClonesArray * digits)
d15a28e7 340{
b2a60966 341 // Calculates the dispersion of the shower at the origine of the RecPoint
342
e5b16749 343 Float_t d = 0. ;
344 Float_t wtot = 0. ;
d15a28e7 345
d084d50d 346 Float_t x = 0.;
347 Float_t z = 0.;
d15a28e7 348
349 AliPHOSDigit * digit ;
7b7c1533 350
686b771f 351 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
e5b16749 352
353 // Calculates the center of gravity in the local PHOS-module coordinates
354
d15a28e7 355 Int_t iDigit;
e5b16749 356
357 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
358 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
359 Int_t relid[4] ;
360 Float_t xi ;
361 Float_t zi ;
362 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
363 phosgeom->RelPosInModule(relid, xi, zi);
364 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
365 x += xi * w ;
366 z += zi * w ;
367 wtot += w ;
368 }
369 x /= wtot ;
370 z /= wtot ;
371
372
373// Calculates the dispersion in coordinates
374 wtot = 0.;
88714635 375 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
7932f811 376 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
d15a28e7 377 Int_t relid[4] ;
378 Float_t xi ;
379 Float_t zi ;
92862013 380 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
381 phosgeom->RelPosInModule(relid, xi, zi);
7932f811 382 Float_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
92862013 383 d += w*((xi-x)*(xi-x) + (zi-z)*(zi-z) ) ;
d15a28e7 384 wtot+=w ;
d084d50d 385
386
d15a28e7 387 }
e5b16749 388
7932f811 389
92862013 390 d /= wtot ;
d15a28e7 391
7932f811 392 fDispersion = TMath::Sqrt(d) ;
c63c49e9 393
d15a28e7 394}
fad3e5b9 395//______________________________________________________________________________
e5b16749 396void AliPHOSEmcRecPoint::EvalCoreEnergy(Float_t logWeight, TClonesArray * digits)
fad3e5b9 397{
a4e98857 398 // This function calculates energy in the core,
399 // i.e. within a radius rad = 3cm around the center. Beyond this radius
400 // in accordance with shower profile the energy deposition
fad3e5b9 401 // should be less than 2%
402
fad3e5b9 403 Float_t coreRadius = 3 ;
404
e5b16749 405 Float_t x = 0 ;
406 Float_t z = 0 ;
fad3e5b9 407
408 AliPHOSDigit * digit ;
7b7c1533 409
686b771f 410 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
88cb7938 411
fad3e5b9 412 Int_t iDigit;
e5b16749 413
414// Calculates the center of gravity in the local PHOS-module coordinates
415 Float_t wtot = 0;
416 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
417 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
418 Int_t relid[4] ;
419 Float_t xi ;
420 Float_t zi ;
421 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
422 phosgeom->RelPosInModule(relid, xi, zi);
423 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
424 x += xi * w ;
425 z += zi * w ;
426 wtot += w ;
427 }
428 x /= wtot ;
429 z /= wtot ;
430
431
fad3e5b9 432 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
7932f811 433 digit = (AliPHOSDigit *) ( digits->At(fDigitsList[iDigit]) ) ;
fad3e5b9 434 Int_t relid[4] ;
435 Float_t xi ;
436 Float_t zi ;
437 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
438 phosgeom->RelPosInModule(relid, xi, zi);
439 Float_t distance = TMath::Sqrt((xi-x)*(xi-x)+(zi-z)*(zi-z)) ;
440 if(distance < coreRadius)
7932f811 441 fCoreEnergy += fEnergyList[iDigit] ;
fad3e5b9 442 }
443
fad3e5b9 444}
d15a28e7 445
446//____________________________________________________________________________
7932f811 447void AliPHOSEmcRecPoint::EvalElipsAxis(Float_t logWeight,TClonesArray * digits)
d15a28e7 448{
b2a60966 449 // Calculates the axis of the shower ellipsoid
83974468 450
e8dbb96e 451 Double_t wtot = 0. ;
452 Double_t x = 0.;
453 Double_t z = 0.;
454 Double_t dxx = 0.;
455 Double_t dzz = 0.;
456 Double_t dxz = 0.;
d15a28e7 457
458 AliPHOSDigit * digit ;
7b7c1533 459
686b771f 460 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
7b7c1533 461
d15a28e7 462 Int_t iDigit;
463
e5b16749 464
d15a28e7 465 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
7932f811 466 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
d15a28e7 467 Int_t relid[4] ;
468 Float_t xi ;
469 Float_t zi ;
92862013 470 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
471 phosgeom->RelPosInModule(relid, xi, zi);
7932f811 472 Double_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
92862013 473 dxx += w * xi * xi ;
d15a28e7 474 x += w * xi ;
92862013 475 dzz += w * zi * zi ;
d15a28e7 476 z += w * zi ;
92862013 477 dxz += w * xi * zi ;
d15a28e7 478 wtot += w ;
479 }
92862013 480 dxx /= wtot ;
d15a28e7 481 x /= wtot ;
92862013 482 dxx -= x * x ;
483 dzz /= wtot ;
d15a28e7 484 z /= wtot ;
92862013 485 dzz -= z * z ;
486 dxz /= wtot ;
487 dxz -= x * z ;
d15a28e7 488
69183710 489// //Apply correction due to non-perpendicular incidence
490// Double_t CosX ;
491// Double_t CosZ ;
88cb7938 492// AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
7b7c1533 493// AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
494 // Double_t DistanceToIP= (Double_t ) phosgeom->GetIPtoCrystalSurface() ;
69183710 495
496// CosX = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+x*x) ;
497// CosZ = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+z*z) ;
498
499// dxx = dxx/(CosX*CosX) ;
500// dzz = dzz/(CosZ*CosZ) ;
501// dxz = dxz/(CosX*CosZ) ;
502
503
7932f811 504 fLambda[0] = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
505 if(fLambda[0] > 0)
506 fLambda[0] = TMath::Sqrt(fLambda[0]) ;
e8dbb96e 507
7932f811 508 fLambda[1] = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
509 if(fLambda[1] > 0) //To avoid exception if numerical errors lead to negative lambda.
510 fLambda[1] = TMath::Sqrt(fLambda[1]) ;
e8dbb96e 511 else
7932f811 512 fLambda[1]= 0. ;
d15a28e7 513}
514
515//____________________________________________________________________________
ce2a9a95 516void AliPHOSEmcRecPoint::EvalMoments(Float_t logWeight,TClonesArray * digits)
517{
518 // Calculate the shower moments in the eigen reference system
519 // M2x, M2z, M3x, M4z
520 // Calculate the angle between the shower position vector and the eigen vector
521
522 Double_t wtot = 0. ;
523 Double_t x = 0.;
524 Double_t z = 0.;
525 Double_t dxx = 0.;
526 Double_t dzz = 0.;
527 Double_t dxz = 0.;
528 Double_t lambda0=0, lambda1=0;
529
530 AliPHOSDigit * digit ;
531
686b771f 532 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
ce2a9a95 533
534 Int_t iDigit;
535
536 // 1) Find covariance matrix elements:
537 // || dxx dxz ||
538 // || dxz dzz ||
539
540 Float_t xi ;
541 Float_t zi ;
542 Int_t relid[4] ;
543 Double_t w;
544 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
545 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
546 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
547 phosgeom->RelPosInModule(relid, xi, zi);
548 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
549 x += w * xi ;
550 z += w * zi ;
551 dxx += w * xi * xi ;
552 dzz += w * zi * zi ;
553 dxz += w * xi * zi ;
554 wtot += w ;
555 }
556 x /= wtot ;
557 z /= wtot ;
558 dxx /= wtot ;
559 dzz /= wtot ;
560 dxz /= wtot ;
561 dxx -= x * x ;
562 dzz -= z * z ;
563 dxz -= x * z ;
564
565 // 2) Find covariance matrix eigen values lambda0 and lambda1
566
567 lambda0 = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
568 lambda1 = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
569
570 // 3) Find covariance matrix eigen vectors e0 and e1
571
572 TVector2 e0,e1;
573 if (dxz != 0)
574 e0.Set(1.,(lambda0-dxx)/dxz);
575 else
576 e0.Set(0.,1.);
577
578 e0 = e0.Unit();
579 e1.Set(-e0.Y(),e0.X());
580
581 // 4) Rotate cluster tensor from (x,z) to (e0,e1) system
582 // and calculate moments M3x and M4z
583
584 Float_t cosPhi = e0.X();
585 Float_t sinPhi = e0.Y();
586
587 Float_t xiPHOS ;
588 Float_t ziPHOS ;
589 Double_t dx3, dz3, dz4;
590 wtot = 0.;
591 x = 0.;
592 z = 0.;
593 dxx = 0.;
594 dzz = 0.;
595 dxz = 0.;
596 dx3 = 0.;
597 dz3 = 0.;
598 dz4 = 0.;
599 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
600 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
601 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
602 phosgeom->RelPosInModule(relid, xiPHOS, ziPHOS);
603 xi = xiPHOS*cosPhi + ziPHOS*sinPhi;
604 zi = ziPHOS*cosPhi - xiPHOS*sinPhi;
605 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
606 x += w * xi ;
607 z += w * zi ;
608 dxx += w * xi * xi ;
609 dzz += w * zi * zi ;
610 dxz += w * xi * zi ;
611 dx3 += w * xi * xi * xi;
612 dz3 += w * zi * zi * zi ;
613 dz4 += w * zi * zi * zi * zi ;
614 wtot += w ;
615 }
616 x /= wtot ;
617 z /= wtot ;
618 dxx /= wtot ;
619 dzz /= wtot ;
620 dxz /= wtot ;
621 dx3 /= wtot ;
622 dz3 /= wtot ;
623 dz4 /= wtot ;
624 dx3 += -3*dxx*x + 2*x*x*x;
625 dz4 += -4*dz3*z + 6*dzz*z*z -3*z*z*z*z;
626 dxx -= x * x ;
627 dzz -= z * z ;
628 dxz -= x * z ;
629
630 // 5) Find an angle between cluster center vector and eigen vector e0
631
632 Float_t phi = TMath::ACos ((x*e0.X() + z*e0.Y()) / sqrt(x*x + z*z));
633
634 fM2x = lambda0;
635 fM2z = lambda1;
636 fM3x = dx3;
637 fM4z = dz4;
638 fPhixe = phi;
639
640}
641//____________________________________________________________________________
7932f811 642void AliPHOSEmcRecPoint::EvalAll(Float_t logWeight, TClonesArray * digits )
ad8cfaf4 643{
baef0810 644 // Evaluates all shower parameters
7932f811 645 EvalLocalPosition(logWeight, digits) ;
646 EvalElipsAxis(logWeight, digits) ;
ce2a9a95 647 EvalMoments(logWeight, digits) ;
7932f811 648 EvalDispersion(logWeight, digits) ;
e5b16749 649 EvalCoreEnergy(logWeight, digits);
a6eedfad 650 EvalTime(digits) ;
e957fea8 651 AliPHOSRecPoint::EvalAll(digits) ;
ad8cfaf4 652}
653//____________________________________________________________________________
7932f811 654void AliPHOSEmcRecPoint::EvalLocalPosition(Float_t logWeight, TClonesArray * digits)
b2a60966 655{
656 // Calculates the center of gravity in the local PHOS-module coordinates
b2a60966 657 Float_t wtot = 0. ;
658
659 Int_t relid[4] ;
660
661 Float_t x = 0. ;
662 Float_t z = 0. ;
663
664 AliPHOSDigit * digit ;
665
686b771f 666 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
b2a60966 667
668 Int_t iDigit;
669
b2a60966 670 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
7932f811 671 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
b2a60966 672
673 Float_t xi ;
674 Float_t zi ;
675 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
676 phosgeom->RelPosInModule(relid, xi, zi);
7932f811 677 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
b2a60966 678 x += xi * w ;
679 z += zi * w ;
680 wtot += w ;
b2a60966 681
9ce1a8d9 682 }
69183710 683 x /= wtot ;
684 z /= wtot ;
ad8cfaf4 685
686 // Correction for the depth of the shower starting point (TDR p 127)
687 Float_t para = 0.925 ;
688 Float_t parb = 6.52 ;
689
1b799736 690 Float_t xo,yo,zo ; //Coordinates of the origin
686b771f 691 //We should check all 3 possibilities to avoid seg.v.
692 if(gAlice && gAlice->GetMCApp() && gAlice->Generator())
693 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
694 else{
695 xo=yo=zo=0.;
696 }
5830e1d9 697 Float_t phi = phosgeom->GetPHOSAngle(relid[0]) ;
1b799736 698
699 //Transform to the local ref.frame
700 Float_t xoL,yoL ;
701 xoL = xo*TMath::Cos(phi)-yo*TMath::Sin(phi) ;
702 yoL = xo*TMath::Sin(phi)+yo*TMath::Cos(phi) ;
703
fd84cb73 704 Float_t radius = phosgeom->GetIPtoCrystalSurface()-yoL;
1b799736 705
706 Float_t incidencephi = TMath::ATan((x-xoL ) / radius) ;
707 Float_t incidencetheta = TMath::ATan((z-zo) / radius) ;
ad8cfaf4 708
709 Float_t depthx = ( para * TMath::Log(fAmp) + parb ) * TMath::Sin(incidencephi) ;
710 Float_t depthz = ( para * TMath::Log(fAmp) + parb ) * TMath::Sin(incidencetheta) ;
ad8cfaf4 711
712 fLocPos.SetX(x - depthx) ;
b2a60966 713 fLocPos.SetY(0.) ;
ad8cfaf4 714 fLocPos.SetZ(z - depthz) ;
b2a60966 715
a6eedfad 716 fLocPosM = 0 ;
b2a60966 717}
718
719//____________________________________________________________________________
ad8cfaf4 720Float_t AliPHOSEmcRecPoint::GetMaximalEnergy(void) const
d15a28e7 721{
b2a60966 722 // Finds the maximum energy in the cluster
723
d15a28e7 724 Float_t menergy = 0. ;
725
726 Int_t iDigit;
727
728 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
729
730 if(fEnergyList[iDigit] > menergy)
731 menergy = fEnergyList[iDigit] ;
732 }
733 return menergy ;
734}
735
736//____________________________________________________________________________
fc7e2f43 737Int_t AliPHOSEmcRecPoint::GetMultiplicityAtLevel(Float_t H) const
d15a28e7 738{
b2a60966 739 // Calculates the multiplicity of digits with energy larger than H*energy
740
d15a28e7 741 Int_t multipl = 0 ;
742 Int_t iDigit ;
743 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
744
745 if(fEnergyList[iDigit] > H * fAmp)
746 multipl++ ;
747 }
748 return multipl ;
749}
750
751//____________________________________________________________________________
a0636361 752Int_t AliPHOSEmcRecPoint::GetNumberOfLocalMax( AliPHOSDigit ** maxAt, Float_t * maxAtEnergy,
7932f811 753 Float_t locMaxCut,TClonesArray * digits) const
d15a28e7 754{
b2a60966 755 // Calculates the number of local maxima in the cluster using fLocalMaxCut as the minimum
a4e98857 756 // energy difference between two local maxima
b2a60966 757
d15a28e7 758 AliPHOSDigit * digit ;
759 AliPHOSDigit * digitN ;
760
761
762 Int_t iDigitN ;
763 Int_t iDigit ;
764
7932f811 765 for(iDigit = 0; iDigit < fMulDigit; iDigit++)
a0636361 766 maxAt[iDigit] = (AliPHOSDigit*) digits->At(fDigitsList[iDigit]) ;
7932f811 767
d15a28e7 768
6ad0bfa0 769 for(iDigit = 0 ; iDigit < fMulDigit; iDigit++) {
a0636361 770 if(maxAt[iDigit]) {
771 digit = maxAt[iDigit] ;
83974468 772
6ad0bfa0 773 for(iDigitN = 0; iDigitN < fMulDigit; iDigitN++) {
686b771f 774 if(iDigit == iDigitN)
775 continue ;
776
7932f811 777 digitN = (AliPHOSDigit *) digits->At(fDigitsList[iDigitN]) ;
d15a28e7 778
9f616d61 779 if ( AreNeighbours(digit, digitN) ) {
d15a28e7 780 if (fEnergyList[iDigit] > fEnergyList[iDigitN] ) {
a0636361 781 maxAt[iDigitN] = 0 ;
6ad0bfa0 782 // but may be digit too is not local max ?
7932f811 783 if(fEnergyList[iDigit] < fEnergyList[iDigitN] + locMaxCut)
a0636361 784 maxAt[iDigit] = 0 ;
d15a28e7 785 }
786 else {
a0636361 787 maxAt[iDigit] = 0 ;
6ad0bfa0 788 // but may be digitN too is not local max ?
7932f811 789 if(fEnergyList[iDigit] > fEnergyList[iDigitN] - locMaxCut)
a0636361 790 maxAt[iDigitN] = 0 ;
d15a28e7 791 }
792 } // if Areneighbours
793 } // while digitN
794 } // slot not empty
795 } // while digit
796
797 iDigitN = 0 ;
6ad0bfa0 798 for(iDigit = 0; iDigit < fMulDigit; iDigit++) {
a0636361 799 if(maxAt[iDigit]){
d15a28e7 800 maxAt[iDigitN] = maxAt[iDigit] ;
9f616d61 801 maxAtEnergy[iDigitN] = fEnergyList[iDigit] ;
802 iDigitN++ ;
d15a28e7 803 }
804 }
805 return iDigitN ;
806}
9688c1dd 807//____________________________________________________________________________
0bc3b8ed 808void AliPHOSEmcRecPoint::EvalTime(TClonesArray * digits)
809{
810 // Define a rec.point time as a time in the cell with the maximum energy
811
9688c1dd 812 Float_t maxE = 0;
813 Int_t maxAt = 0;
814 for(Int_t idig=0; idig < fMulDigit; idig++){
815 if(fEnergyList[idig] > maxE){
816 maxE = fEnergyList[idig] ;
817 maxAt = idig;
818 }
819 }
820 fTime = ((AliPHOSDigit*) digits->At(fDigitsList[maxAt]))->GetTime() ;
821
822}
d15a28e7 823//____________________________________________________________________________
092b50ba 824void AliPHOSEmcRecPoint::Purify(Float_t threshold){
825 //Removes digits below threshold
826
0fbb8738 827 Int_t * tempo = new Int_t[fMaxDigit];
828 Float_t * tempoE = new Float_t[fMaxDigit];
092b50ba 829
830 Int_t mult = 0 ;
831 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
832 if(fEnergyList[iDigit] > threshold){
833 tempo[mult] = fDigitsList[iDigit] ;
834 tempoE[mult] = fEnergyList[iDigit] ;
835 mult++ ;
836 }
837 }
838
839 fMulDigit = mult ;
840 delete [] fDigitsList ;
841 delete [] fEnergyList ;
0fbb8738 842 fDigitsList = new Int_t[fMulDigit];
843 fEnergyList = new Float_t[fMulDigit];
092b50ba 844
0458aa58 845 fAmp = 0.; //Recalculate total energy
092b50ba 846 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
0458aa58 847 fDigitsList[iDigit] = tempo[iDigit];
848 fEnergyList[iDigit] = tempoE[iDigit] ;
849 fAmp+=tempoE[iDigit];
092b50ba 850 }
851
852 delete [] tempo ;
853 delete [] tempoE ;
854
855}
856//____________________________________________________________________________
a8c47ab6 857void AliPHOSEmcRecPoint::Print(Option_t *) const
d15a28e7 858{
b2a60966 859 // Print the list of digits belonging to the cluster
860
21cd0c07 861 TString message ;
862 message = "AliPHOSEmcRecPoint:\n" ;
863 message += " digits # = " ;
351dd634 864 AliInfo(Form(message.Data())) ;
d15a28e7 865
d15a28e7 866 Int_t iDigit;
7932f811 867 for(iDigit=0; iDigit<fMulDigit; iDigit++)
53ad38d8 868 printf(" %d ", fDigitsList[iDigit] ) ;
7932f811 869
351dd634 870 printf(" Energies = ") ;
7932f811 871 for(iDigit=0; iDigit<fMulDigit; iDigit++)
53ad38d8 872 printf(" %f ", fEnergyList[iDigit] ) ;
873 printf("\n") ;
351dd634 874 printf(" Primaries ") ;
bc68d12c 875 for(iDigit = 0;iDigit < fMulTrack; iDigit++)
53ad38d8 876 printf(" %d ", fTracksList[iDigit]) ;
877 printf("\n") ;
21cd0c07 878 message = " Multiplicity = %d" ;
879 message += " Cluster Energy = %f" ;
880 message += " Number of primaries %d" ;
881 message += " Stored at position %d" ;
83974468 882
351dd634 883 printf(message.Data(), fMulDigit, fAmp, fMulTrack,GetIndexInList() ) ;
d15a28e7 884}
88714635 885
7932f811 886