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Adaption to new fluka common blocks (E. Futo)
[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
d15a28e7 18//_________________________________________________________________________
b2a60966 19// RecPoint implementation for PHOS-EMC
20// An EmcRecPoint is a cluster of digits
baef0810 21//*--
b2a60966 22//*-- Author: Dmitri Peressounko (RRC KI & SUBATECH)
23
d15a28e7 24
25// --- ROOT system ---
9f616d61 26#include "TPad.h"
27#include "TH2.h"
d15a28e7 28#include "TMath.h"
9f616d61 29#include "TCanvas.h"
55fe9d13 30#include "TGraph.h"
d15a28e7 31
32// --- Standard library ---
33
d15a28e7 34// --- AliRoot header files ---
35
a6eedfad 36 #include "AliGenerator.h"
d15a28e7 37#include "AliPHOSGeometry.h"
38#include "AliPHOSEmcRecPoint.h"
39#include "AliRun.h"
7b7c1533 40#include "AliPHOSGetter.h"
d15a28e7 41
42ClassImp(AliPHOSEmcRecPoint)
43
44//____________________________________________________________________________
7932f811 45AliPHOSEmcRecPoint::AliPHOSEmcRecPoint() : AliPHOSRecPoint()
d15a28e7 46{
47 // ctor
48
49 fMulDigit = 0 ;
50 fAmp = 0. ;
7932f811 51 fCoreEnergy = 0 ;
52 fEnergyList = 0 ;
94256c23 53 fNExMax = 0 ; //Not unfolded yet
9688c1dd 54 fTime = -1. ;
a6eedfad 55 fLocPos.SetX(1000000.) ; //Local position should be evaluated
ce2a9a95 56 fDebug=0;
7b7c1533 57
83974468 58}
59
73a68ccb 60//____________________________________________________________________________
61AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const char * opt) : AliPHOSRecPoint(opt)
62{
63 // ctor
64
65 fMulDigit = 0 ;
66 fAmp = 0. ;
94256c23 67 fNExMax = 0 ; //Not unfolded yet
73a68ccb 68 fCoreEnergy = 0 ;
69 fEnergyList = 0 ;
70 fTime = -1. ;
71 fLocPos.SetX(1000000.) ; //Local position should be evaluated
ce2a9a95 72 fDebug=0;
73a68ccb 73
74}
75
55fe9d13 76//____________________________________________________________________________
77AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const AliPHOSEmcRecPoint & rp) : AliPHOSRecPoint(rp)
78{
79 // cpy ctor
80
81 fMulDigit = rp.fMulDigit ;
82 fAmp = rp.fAmp ;
83 fCoreEnergy = rp.fCoreEnergy ;
84 fEnergyList = new Float_t[rp.fMulDigit] ;
85 Int_t index ;
86 for(index = 0 ; index < fMulDigit ; index++)
87 fEnergyList[index] = rp.fEnergyList[index] ;
88 fNExMax = rp.fNExMax ;
89 fTime = rp.fTime ;
90}
91
83974468 92//____________________________________________________________________________
93AliPHOSEmcRecPoint::~AliPHOSEmcRecPoint()
94{
88714635 95 // dtor
a4e98857 96
83974468 97 if ( fEnergyList )
98 delete[] fEnergyList ;
d15a28e7 99}
100
d15a28e7 101//____________________________________________________________________________
83974468 102void AliPHOSEmcRecPoint::AddDigit(AliPHOSDigit & digit, Float_t Energy)
d15a28e7 103{
b2a60966 104 // Adds a digit to the RecPoint
a4e98857 105 // and accumulates the total amplitude and the multiplicity
d15a28e7 106
7932f811 107 if(fEnergyList == 0)
108 fEnergyList = new Float_t[fMaxDigit];
109
d15a28e7 110 if ( fMulDigit >= fMaxDigit ) { // increase the size of the lists
9f616d61 111 fMaxDigit*=2 ;
83974468 112 Int_t * tempo = new ( Int_t[fMaxDigit] ) ;
9f616d61 113 Float_t * tempoE = new ( Float_t[fMaxDigit] ) ;
114
115 Int_t index ;
d15a28e7 116 for ( index = 0 ; index < fMulDigit ; index++ ){
83974468 117 tempo[index] = fDigitsList[index] ;
d15a28e7 118 tempoE[index] = fEnergyList[index] ;
119 }
120
9f616d61 121 delete [] fDigitsList ;
83974468 122 fDigitsList = new ( Int_t[fMaxDigit] ) ;
9f616d61 123
124 delete [] fEnergyList ;
125 fEnergyList = new ( Float_t[fMaxDigit] ) ;
126
127 for ( index = 0 ; index < fMulDigit ; index++ ){
128 fDigitsList[index] = tempo[index] ;
129 fEnergyList[index] = tempoE[index] ;
130 }
131
132 delete [] tempo ;
133 delete [] tempoE ;
134 } // if
d15a28e7 135
83974468 136 fDigitsList[fMulDigit] = digit.GetIndexInList() ;
137 fEnergyList[fMulDigit] = Energy ;
138 fMulDigit++ ;
d15a28e7 139 fAmp += Energy ;
7932f811 140
141 EvalPHOSMod(&digit) ;
d15a28e7 142}
143
144//____________________________________________________________________________
ad8cfaf4 145Bool_t AliPHOSEmcRecPoint::AreNeighbours(AliPHOSDigit * digit1, AliPHOSDigit * digit2 ) const
d15a28e7 146{
a4e98857 147 // Tells if (true) or not (false) two digits are neighbors
d15a28e7 148
149 Bool_t aren = kFALSE ;
150
7b7c1533 151 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
152 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
153
d15a28e7 154 Int_t relid1[4] ;
92862013 155 phosgeom->AbsToRelNumbering(digit1->GetId(), relid1) ;
d15a28e7 156
157 Int_t relid2[4] ;
92862013 158 phosgeom->AbsToRelNumbering(digit2->GetId(), relid2) ;
d15a28e7 159
92862013 160 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
161 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
d15a28e7 162
92862013 163 if (( coldiff <= 1 ) && ( rowdiff <= 1 ) && (coldiff + rowdiff > 0))
d15a28e7 164 aren = kTRUE ;
165
166 return aren ;
167}
168
169//____________________________________________________________________________
2a941f4e 170Int_t AliPHOSEmcRecPoint::Compare(const TObject * obj) const
d15a28e7 171{
b2a60966 172 // Compares two RecPoints according to their position in the PHOS modules
173
7932f811 174 Float_t delta = 1 ; //Width of "Sorting row". If you changibg this
175 //value (what is senseless) change as vell delta in
176 //AliPHOSTrackSegmentMakerv* and other RecPoints...
d15a28e7 177 Int_t rv ;
178
179 AliPHOSEmcRecPoint * clu = (AliPHOSEmcRecPoint *)obj ;
180
181
ad8cfaf4 182 Int_t phosmod1 = GetPHOSMod() ;
92862013 183 Int_t phosmod2 = clu->GetPHOSMod() ;
d15a28e7 184
92862013 185 TVector3 locpos1;
7932f811 186 GetLocalPosition(locpos1) ;
92862013 187 TVector3 locpos2;
188 clu->GetLocalPosition(locpos2) ;
d15a28e7 189
92862013 190 if(phosmod1 == phosmod2 ) {
7932f811 191 Int_t rowdif = (Int_t)TMath::Ceil(locpos1.X()/delta)-(Int_t)TMath::Ceil(locpos2.X()/delta) ;
d15a28e7 192 if (rowdif> 0)
7932f811 193 rv = 1 ;
d15a28e7 194 else if(rowdif < 0)
7932f811 195 rv = -1 ;
92862013 196 else if(locpos1.Z()>locpos2.Z())
d15a28e7 197 rv = -1 ;
198 else
199 rv = 1 ;
200 }
201
202 else {
92862013 203 if(phosmod1 < phosmod2 )
d15a28e7 204 rv = -1 ;
205 else
206 rv = 1 ;
207 }
208
209 return rv ;
210}
9f616d61 211//______________________________________________________________________________
baef0810 212void AliPHOSEmcRecPoint::ExecuteEvent(Int_t event, Int_t px, Int_t py) const
9f616d61 213{
9f616d61 214
9688c1dd 215 // Execute action corresponding to one event
216 // This member function is called when a AliPHOSRecPoint is clicked with the locator
217 //
218 // If Left button is clicked on AliPHOSRecPoint, the digits are switched on
219 // and switched off when the mouse button is released.
220
221
222 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
223 if(!gime) return ;
224 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
83974468 225
9688c1dd 226 static TGraph * digitgraph = 0 ;
83974468 227
9688c1dd 228 if (!gPad->IsEditable()) return;
83974468 229
9688c1dd 230 TH2F * histo = 0 ;
231 TCanvas * histocanvas ;
232
afa51c4e 233 const TClonesArray * digits = gime->Digits() ;
9688c1dd 234
235 switch (event) {
83974468 236
9688c1dd 237 case kButton1Down: {
238 AliPHOSDigit * digit ;
239 Int_t iDigit;
240 Int_t relid[4] ;
83974468 241
9688c1dd 242 const Int_t kMulDigit = AliPHOSEmcRecPoint::GetDigitsMultiplicity() ;
243 Float_t * xi = new Float_t[kMulDigit] ;
244 Float_t * zi = new Float_t[kMulDigit] ;
83974468 245
9688c1dd 246 // create the histogram for the single cluster
247 // 1. gets histogram boundaries
248 Float_t ximax = -999. ;
249 Float_t zimax = -999. ;
250 Float_t ximin = 999. ;
251 Float_t zimin = 999. ;
83974468 252
9688c1dd 253 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
254 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
255 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
256 phosgeom->RelPosInModule(relid, xi[iDigit], zi[iDigit]);
257 if ( xi[iDigit] > ximax )
258 ximax = xi[iDigit] ;
259 if ( xi[iDigit] < ximin )
260 ximin = xi[iDigit] ;
261 if ( zi[iDigit] > zimax )
262 zimax = zi[iDigit] ;
263 if ( zi[iDigit] < zimin )
264 zimin = zi[iDigit] ;
265 }
266 ximax += phosgeom->GetCrystalSize(0) / 2. ;
267 zimax += phosgeom->GetCrystalSize(2) / 2. ;
268 ximin -= phosgeom->GetCrystalSize(0) / 2. ;
269 zimin -= phosgeom->GetCrystalSize(2) / 2. ;
270 Int_t xdim = (int)( (ximax - ximin ) / phosgeom->GetCrystalSize(0) + 0.5 ) ;
271 Int_t zdim = (int)( (zimax - zimin ) / phosgeom->GetCrystalSize(2) + 0.5 ) ;
83974468 272
9688c1dd 273 // 2. gets the histogram title
83974468 274
9688c1dd 275 Text_t title[100] ;
276 sprintf(title,"Energy=%1.2f GeV ; Digits ; %d ", GetEnergy(), GetDigitsMultiplicity()) ;
83974468 277
9688c1dd 278 if (!histo) {
279 delete histo ;
280 histo = 0 ;
281 }
282 histo = new TH2F("cluster3D", title, xdim, ximin, ximax, zdim, zimin, zimax) ;
83974468 283
9688c1dd 284 Float_t x, z ;
285 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
286 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
287 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
288 phosgeom->RelPosInModule(relid, x, z);
289 histo->Fill(x, z, fEnergyList[iDigit] ) ;
290 }
83974468 291
9688c1dd 292 if (!digitgraph) {
293 digitgraph = new TGraph(kMulDigit,xi,zi);
294 digitgraph-> SetMarkerStyle(5) ;
295 digitgraph-> SetMarkerSize(1.) ;
296 digitgraph-> SetMarkerColor(1) ;
297 digitgraph-> Paint("P") ;
298 }
83974468 299
9688c1dd 300 // Print() ;
301 histocanvas = new TCanvas("cluster", "a single cluster", 600, 500) ;
302 histocanvas->Draw() ;
303 histo->Draw("lego1") ;
83974468 304
9688c1dd 305 delete[] xi ;
306 delete[] zi ;
83974468 307
9688c1dd 308 break;
309 }
83974468 310
9688c1dd 311 case kButton1Up:
312 if (digitgraph) {
313 delete digitgraph ;
314 digitgraph = 0 ;
315 }
316 break;
9f616d61 317
9688c1dd 318 }
9f616d61 319}
320
d15a28e7 321//____________________________________________________________________________
7932f811 322void AliPHOSEmcRecPoint::EvalDispersion(Float_t logWeight,TClonesArray * digits)
d15a28e7 323{
b2a60966 324 // Calculates the dispersion of the shower at the origine of the RecPoint
325
e5b16749 326 Float_t d = 0. ;
327 Float_t wtot = 0. ;
d15a28e7 328
d084d50d 329 Float_t x = 0.;
330 Float_t z = 0.;
d15a28e7 331
332 AliPHOSDigit * digit ;
7b7c1533 333
334 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
335 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
d15a28e7 336
e5b16749 337
338 // Calculates the center of gravity in the local PHOS-module coordinates
339
d15a28e7 340 Int_t iDigit;
e5b16749 341
342 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
343 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
344 Int_t relid[4] ;
345 Float_t xi ;
346 Float_t zi ;
347 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
348 phosgeom->RelPosInModule(relid, xi, zi);
349 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
350 x += xi * w ;
351 z += zi * w ;
352 wtot += w ;
353 }
354 x /= wtot ;
355 z /= wtot ;
356
357
358// Calculates the dispersion in coordinates
359 wtot = 0.;
88714635 360 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
7932f811 361 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
d15a28e7 362 Int_t relid[4] ;
363 Float_t xi ;
364 Float_t zi ;
92862013 365 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
366 phosgeom->RelPosInModule(relid, xi, zi);
7932f811 367 Float_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
92862013 368 d += w*((xi-x)*(xi-x) + (zi-z)*(zi-z) ) ;
d15a28e7 369 wtot+=w ;
d084d50d 370
371
d15a28e7 372 }
e5b16749 373
7932f811 374
92862013 375 d /= wtot ;
d15a28e7 376
7932f811 377 fDispersion = TMath::Sqrt(d) ;
c63c49e9 378
d15a28e7 379}
fad3e5b9 380//______________________________________________________________________________
e5b16749 381void AliPHOSEmcRecPoint::EvalCoreEnergy(Float_t logWeight, TClonesArray * digits)
fad3e5b9 382{
a4e98857 383 // This function calculates energy in the core,
384 // i.e. within a radius rad = 3cm around the center. Beyond this radius
385 // in accordance with shower profile the energy deposition
fad3e5b9 386 // should be less than 2%
387
fad3e5b9 388 Float_t coreRadius = 3 ;
389
e5b16749 390 Float_t x = 0 ;
391 Float_t z = 0 ;
fad3e5b9 392
393 AliPHOSDigit * digit ;
7b7c1533 394
395 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
396 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
397
fad3e5b9 398 Int_t iDigit;
e5b16749 399
400// Calculates the center of gravity in the local PHOS-module coordinates
401 Float_t wtot = 0;
402 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
403 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
404 Int_t relid[4] ;
405 Float_t xi ;
406 Float_t zi ;
407 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
408 phosgeom->RelPosInModule(relid, xi, zi);
409 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
410 x += xi * w ;
411 z += zi * w ;
412 wtot += w ;
413 }
414 x /= wtot ;
415 z /= wtot ;
416
417
fad3e5b9 418 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
7932f811 419 digit = (AliPHOSDigit *) ( digits->At(fDigitsList[iDigit]) ) ;
fad3e5b9 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 Float_t distance = TMath::Sqrt((xi-x)*(xi-x)+(zi-z)*(zi-z)) ;
426 if(distance < coreRadius)
7932f811 427 fCoreEnergy += fEnergyList[iDigit] ;
fad3e5b9 428 }
429
fad3e5b9 430}
d15a28e7 431
432//____________________________________________________________________________
7932f811 433void AliPHOSEmcRecPoint::EvalElipsAxis(Float_t logWeight,TClonesArray * digits)
d15a28e7 434{
b2a60966 435 // Calculates the axis of the shower ellipsoid
83974468 436
e8dbb96e 437 Double_t wtot = 0. ;
438 Double_t x = 0.;
439 Double_t z = 0.;
440 Double_t dxx = 0.;
441 Double_t dzz = 0.;
442 Double_t dxz = 0.;
d15a28e7 443
444 AliPHOSDigit * digit ;
7b7c1533 445
446 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
447 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
448
d15a28e7 449 Int_t iDigit;
450
e5b16749 451
d15a28e7 452 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
7932f811 453 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
d15a28e7 454 Int_t relid[4] ;
455 Float_t xi ;
456 Float_t zi ;
92862013 457 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
458 phosgeom->RelPosInModule(relid, xi, zi);
7932f811 459 Double_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
92862013 460 dxx += w * xi * xi ;
d15a28e7 461 x += w * xi ;
92862013 462 dzz += w * zi * zi ;
d15a28e7 463 z += w * zi ;
92862013 464 dxz += w * xi * zi ;
d15a28e7 465 wtot += w ;
466 }
92862013 467 dxx /= wtot ;
d15a28e7 468 x /= wtot ;
92862013 469 dxx -= x * x ;
470 dzz /= wtot ;
d15a28e7 471 z /= wtot ;
92862013 472 dzz -= z * z ;
473 dxz /= wtot ;
474 dxz -= x * z ;
d15a28e7 475
69183710 476// //Apply correction due to non-perpendicular incidence
477// Double_t CosX ;
478// Double_t CosZ ;
7b7c1533 479// AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
480// AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
481 // Double_t DistanceToIP= (Double_t ) phosgeom->GetIPtoCrystalSurface() ;
69183710 482
483// CosX = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+x*x) ;
484// CosZ = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+z*z) ;
485
486// dxx = dxx/(CosX*CosX) ;
487// dzz = dzz/(CosZ*CosZ) ;
488// dxz = dxz/(CosX*CosZ) ;
489
490
7932f811 491 fLambda[0] = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
492 if(fLambda[0] > 0)
493 fLambda[0] = TMath::Sqrt(fLambda[0]) ;
e8dbb96e 494
7932f811 495 fLambda[1] = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
496 if(fLambda[1] > 0) //To avoid exception if numerical errors lead to negative lambda.
497 fLambda[1] = TMath::Sqrt(fLambda[1]) ;
e8dbb96e 498 else
7932f811 499 fLambda[1]= 0. ;
d15a28e7 500}
501
ce2a9a95 502//____________________________________________________________________________
503void AliPHOSEmcRecPoint::EvalMoments(Float_t logWeight,TClonesArray * digits)
504{
505 // Calculate the shower moments in the eigen reference system
506 // M2x, M2z, M3x, M4z
507 // Calculate the angle between the shower position vector and the eigen vector
508
509 Double_t wtot = 0. ;
510 Double_t x = 0.;
511 Double_t z = 0.;
512 Double_t dxx = 0.;
513 Double_t dzz = 0.;
514 Double_t dxz = 0.;
515 Double_t lambda0=0, lambda1=0;
516
517 AliPHOSDigit * digit ;
518
519 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
520 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
521
522 Int_t iDigit;
523
524 // 1) Find covariance matrix elements:
525 // || dxx dxz ||
526 // || dxz dzz ||
527
528 Float_t xi ;
529 Float_t zi ;
530 Int_t relid[4] ;
531 Double_t w;
532 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
533 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
534 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
535 phosgeom->RelPosInModule(relid, xi, zi);
536 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
537 x += w * xi ;
538 z += w * zi ;
539 dxx += w * xi * xi ;
540 dzz += w * zi * zi ;
541 dxz += w * xi * zi ;
542 wtot += w ;
543 }
544 x /= wtot ;
545 z /= wtot ;
546 dxx /= wtot ;
547 dzz /= wtot ;
548 dxz /= wtot ;
549 dxx -= x * x ;
550 dzz -= z * z ;
551 dxz -= x * z ;
552
553 // 2) Find covariance matrix eigen values lambda0 and lambda1
554
555 lambda0 = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
556 lambda1 = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
557
558 // 3) Find covariance matrix eigen vectors e0 and e1
559
560 TVector2 e0,e1;
561 if (dxz != 0)
562 e0.Set(1.,(lambda0-dxx)/dxz);
563 else
564 e0.Set(0.,1.);
565
566 e0 = e0.Unit();
567 e1.Set(-e0.Y(),e0.X());
568
569 // 4) Rotate cluster tensor from (x,z) to (e0,e1) system
570 // and calculate moments M3x and M4z
571
572 Float_t cosPhi = e0.X();
573 Float_t sinPhi = e0.Y();
574
575 Float_t xiPHOS ;
576 Float_t ziPHOS ;
577 Double_t dx3, dz3, dz4;
578 wtot = 0.;
579 x = 0.;
580 z = 0.;
581 dxx = 0.;
582 dzz = 0.;
583 dxz = 0.;
584 dx3 = 0.;
585 dz3 = 0.;
586 dz4 = 0.;
587 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
588 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
589 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
590 phosgeom->RelPosInModule(relid, xiPHOS, ziPHOS);
591 xi = xiPHOS*cosPhi + ziPHOS*sinPhi;
592 zi = ziPHOS*cosPhi - xiPHOS*sinPhi;
593 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
594 x += w * xi ;
595 z += w * zi ;
596 dxx += w * xi * xi ;
597 dzz += w * zi * zi ;
598 dxz += w * xi * zi ;
599 dx3 += w * xi * xi * xi;
600 dz3 += w * zi * zi * zi ;
601 dz4 += w * zi * zi * zi * zi ;
602 wtot += w ;
603 }
604 x /= wtot ;
605 z /= wtot ;
606 dxx /= wtot ;
607 dzz /= wtot ;
608 dxz /= wtot ;
609 dx3 /= wtot ;
610 dz3 /= wtot ;
611 dz4 /= wtot ;
612 dx3 += -3*dxx*x + 2*x*x*x;
613 dz4 += -4*dz3*z + 6*dzz*z*z -3*z*z*z*z;
614 dxx -= x * x ;
615 dzz -= z * z ;
616 dxz -= x * z ;
617
618 // 5) Find an angle between cluster center vector and eigen vector e0
619
620 Float_t phi = TMath::ACos ((x*e0.X() + z*e0.Y()) / sqrt(x*x + z*z));
621
622 fM2x = lambda0;
623 fM2z = lambda1;
624 fM3x = dx3;
625 fM4z = dz4;
626 fPhixe = phi;
627
628}
b2a60966 629//____________________________________________________________________________
7932f811 630void AliPHOSEmcRecPoint::EvalAll(Float_t logWeight, TClonesArray * digits )
ad8cfaf4 631{
baef0810 632 // Evaluates all shower parameters
633
7932f811 634 EvalLocalPosition(logWeight, digits) ;
635 EvalElipsAxis(logWeight, digits) ;
ce2a9a95 636 EvalMoments(logWeight, digits) ;
7932f811 637 EvalDispersion(logWeight, digits) ;
e5b16749 638 EvalCoreEnergy(logWeight, digits);
a6eedfad 639 EvalTime(digits) ;
bb53c80c 640 AliPHOSRecPoint::EvalAll(logWeight,digits) ;
ad8cfaf4 641}
642//____________________________________________________________________________
7932f811 643void AliPHOSEmcRecPoint::EvalLocalPosition(Float_t logWeight, TClonesArray * digits)
b2a60966 644{
645 // Calculates the center of gravity in the local PHOS-module coordinates
b2a60966 646 Float_t wtot = 0. ;
647
648 Int_t relid[4] ;
649
650 Float_t x = 0. ;
651 Float_t z = 0. ;
652
653 AliPHOSDigit * digit ;
654
7b7c1533 655 AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
656 AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
b2a60966 657
658 Int_t iDigit;
659
b2a60966 660 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
7932f811 661 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
b2a60966 662
663 Float_t xi ;
664 Float_t zi ;
665 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
666 phosgeom->RelPosInModule(relid, xi, zi);
7932f811 667 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
b2a60966 668 x += xi * w ;
669 z += zi * w ;
670 wtot += w ;
b2a60966 671
9ce1a8d9 672 }
69183710 673
674 x /= wtot ;
675 z /= wtot ;
ad8cfaf4 676
677 // Correction for the depth of the shower starting point (TDR p 127)
678 Float_t para = 0.925 ;
679 Float_t parb = 6.52 ;
680
1b799736 681 Float_t xo,yo,zo ; //Coordinates of the origin
682 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
683
5830e1d9 684 Float_t phi = phosgeom->GetPHOSAngle(relid[0]) ;
1b799736 685
686 //Transform to the local ref.frame
687 Float_t xoL,yoL ;
688 xoL = xo*TMath::Cos(phi)-yo*TMath::Sin(phi) ;
689 yoL = xo*TMath::Sin(phi)+yo*TMath::Cos(phi) ;
690
fd84cb73 691 Float_t radius = phosgeom->GetIPtoCrystalSurface()-yoL;
1b799736 692
693 Float_t incidencephi = TMath::ATan((x-xoL ) / radius) ;
694 Float_t incidencetheta = TMath::ATan((z-zo) / radius) ;
ad8cfaf4 695
696 Float_t depthx = ( para * TMath::Log(fAmp) + parb ) * TMath::Sin(incidencephi) ;
697 Float_t depthz = ( para * TMath::Log(fAmp) + parb ) * TMath::Sin(incidencetheta) ;
ad8cfaf4 698
699 fLocPos.SetX(x - depthx) ;
b2a60966 700 fLocPos.SetY(0.) ;
ad8cfaf4 701 fLocPos.SetZ(z - depthz) ;
b2a60966 702
a6eedfad 703 fLocPosM = 0 ;
b2a60966 704}
705
d15a28e7 706//____________________________________________________________________________
ad8cfaf4 707Float_t AliPHOSEmcRecPoint::GetMaximalEnergy(void) const
d15a28e7 708{
b2a60966 709 // Finds the maximum energy in the cluster
710
d15a28e7 711 Float_t menergy = 0. ;
712
713 Int_t iDigit;
714
715 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
716
717 if(fEnergyList[iDigit] > menergy)
718 menergy = fEnergyList[iDigit] ;
719 }
720 return menergy ;
721}
722
723//____________________________________________________________________________
ad8cfaf4 724Int_t AliPHOSEmcRecPoint::GetMultiplicityAtLevel(const Float_t H) const
d15a28e7 725{
b2a60966 726 // Calculates the multiplicity of digits with energy larger than H*energy
727
d15a28e7 728 Int_t multipl = 0 ;
729 Int_t iDigit ;
730 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
731
732 if(fEnergyList[iDigit] > H * fAmp)
733 multipl++ ;
734 }
735 return multipl ;
736}
737
738//____________________________________________________________________________
a0636361 739Int_t AliPHOSEmcRecPoint::GetNumberOfLocalMax( AliPHOSDigit ** maxAt, Float_t * maxAtEnergy,
7932f811 740 Float_t locMaxCut,TClonesArray * digits) const
d15a28e7 741{
b2a60966 742 // Calculates the number of local maxima in the cluster using fLocalMaxCut as the minimum
a4e98857 743 // energy difference between two local maxima
b2a60966 744
d15a28e7 745 AliPHOSDigit * digit ;
746 AliPHOSDigit * digitN ;
747
748
749 Int_t iDigitN ;
750 Int_t iDigit ;
751
7932f811 752 for(iDigit = 0; iDigit < fMulDigit; iDigit++)
a0636361 753 maxAt[iDigit] = (AliPHOSDigit*) digits->At(fDigitsList[iDigit]) ;
7932f811 754
d15a28e7 755
6ad0bfa0 756 for(iDigit = 0 ; iDigit < fMulDigit; iDigit++) {
a0636361 757 if(maxAt[iDigit]) {
758 digit = maxAt[iDigit] ;
83974468 759
6ad0bfa0 760 for(iDigitN = 0; iDigitN < fMulDigit; iDigitN++) {
7932f811 761 digitN = (AliPHOSDigit *) digits->At(fDigitsList[iDigitN]) ;
d15a28e7 762
9f616d61 763 if ( AreNeighbours(digit, digitN) ) {
d15a28e7 764 if (fEnergyList[iDigit] > fEnergyList[iDigitN] ) {
a0636361 765 maxAt[iDigitN] = 0 ;
6ad0bfa0 766 // but may be digit too is not local max ?
7932f811 767 if(fEnergyList[iDigit] < fEnergyList[iDigitN] + locMaxCut)
a0636361 768 maxAt[iDigit] = 0 ;
d15a28e7 769 }
770 else {
a0636361 771 maxAt[iDigit] = 0 ;
6ad0bfa0 772 // but may be digitN too is not local max ?
7932f811 773 if(fEnergyList[iDigit] > fEnergyList[iDigitN] - locMaxCut)
a0636361 774 maxAt[iDigitN] = 0 ;
d15a28e7 775 }
776 } // if Areneighbours
777 } // while digitN
778 } // slot not empty
779 } // while digit
780
781 iDigitN = 0 ;
6ad0bfa0 782 for(iDigit = 0; iDigit < fMulDigit; iDigit++) {
a0636361 783 if(maxAt[iDigit]){
d15a28e7 784 maxAt[iDigitN] = maxAt[iDigit] ;
9f616d61 785 maxAtEnergy[iDigitN] = fEnergyList[iDigit] ;
786 iDigitN++ ;
d15a28e7 787 }
788 }
789 return iDigitN ;
790}
9688c1dd 791//____________________________________________________________________________
0bc3b8ed 792void AliPHOSEmcRecPoint::EvalTime(TClonesArray * digits)
793{
794 // Define a rec.point time as a time in the cell with the maximum energy
795
9688c1dd 796 Float_t maxE = 0;
797 Int_t maxAt = 0;
798 for(Int_t idig=0; idig < fMulDigit; idig++){
799 if(fEnergyList[idig] > maxE){
800 maxE = fEnergyList[idig] ;
801 maxAt = idig;
802 }
803 }
804 fTime = ((AliPHOSDigit*) digits->At(fDigitsList[maxAt]))->GetTime() ;
805
806}
d15a28e7 807//____________________________________________________________________________
092b50ba 808void AliPHOSEmcRecPoint::Purify(Float_t threshold){
809 //Removes digits below threshold
810
811 Int_t * tempo = new ( Int_t[fMaxDigit] ) ;
812 Float_t * tempoE = new ( Float_t[fMaxDigit] ) ;
813
814 Int_t mult = 0 ;
815 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
816 if(fEnergyList[iDigit] > threshold){
817 tempo[mult] = fDigitsList[iDigit] ;
818 tempoE[mult] = fEnergyList[iDigit] ;
819 mult++ ;
820 }
821 }
822
823 fMulDigit = mult ;
824 delete [] fDigitsList ;
825 delete [] fEnergyList ;
826 fDigitsList = new (Int_t[fMulDigit]) ;
827 fEnergyList = new ( Float_t[fMulDigit]) ;
828
829 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
830 fDigitsList[iDigit] = tempo[iDigit];
831 fEnergyList[iDigit] = tempoE[iDigit] ;
832 }
833
834 delete [] tempo ;
835 delete [] tempoE ;
836
837}
838//____________________________________________________________________________
839void AliPHOSEmcRecPoint::Print(Option_t * option) const
d15a28e7 840{
b2a60966 841 // Print the list of digits belonging to the cluster
842
21cd0c07 843 TString message ;
844 message = "AliPHOSEmcRecPoint:\n" ;
845 message += " digits # = " ;
846 Info("Print", message.Data()) ;
d15a28e7 847
d15a28e7 848 Int_t iDigit;
7932f811 849 for(iDigit=0; iDigit<fMulDigit; iDigit++)
53ad38d8 850 printf(" %d ", fDigitsList[iDigit] ) ;
7932f811 851
21cd0c07 852 Info("Print", " Energies = ") ;
7932f811 853 for(iDigit=0; iDigit<fMulDigit; iDigit++)
53ad38d8 854 printf(" %f ", fEnergyList[iDigit] ) ;
855 printf("\n") ;
21cd0c07 856 Info("Print", " Primaries ") ;
bc68d12c 857 for(iDigit = 0;iDigit < fMulTrack; iDigit++)
53ad38d8 858 printf(" %d ", fTracksList[iDigit]) ;
859 printf("\n") ;
21cd0c07 860 message = " Multiplicity = %d" ;
861 message += " Cluster Energy = %f" ;
862 message += " Number of primaries %d" ;
863 message += " Stored at position %d" ;
83974468 864
21cd0c07 865 Info("Print", message.Data(), fMulDigit, fAmp, fMulTrack,GetIndexInList() ) ;
d15a28e7 866}
88714635 867
7932f811 868