Removal of double digits with high and low gains
[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 * $Log$
3663622c 21 * Revision 1.53 2005/12/20 14:28:47 hristov
22 * Additional protection
23 *
f33a3764 24 * Revision 1.52 2005/05/28 14:19:04 schutz
25 * Compilation warnings fixed by T.P.
26 *
702ab87e 27 */
28
d15a28e7 29//_________________________________________________________________________
b2a60966 30// RecPoint implementation for PHOS-EMC
31// An EmcRecPoint is a cluster of digits
baef0810 32//*--
b2a60966 33//*-- Author: Dmitri Peressounko (RRC KI & SUBATECH)
34
d15a28e7 35
36// --- ROOT system ---
9f616d61 37#include "TH2.h"
d15a28e7 38#include "TMath.h"
9f616d61 39#include "TCanvas.h"
55fe9d13 40#include "TGraph.h"
d15a28e7 41
42// --- Standard library ---
43
d15a28e7 44// --- AliRoot header files ---
351dd634 45#include "AliLog.h"
e957fea8 46#include "AliPHOSLoader.h"
88cb7938 47#include "AliGenerator.h"
d15a28e7 48#include "AliPHOSGeometry.h"
e957fea8 49#include "AliPHOSDigit.h"
d15a28e7 50#include "AliPHOSEmcRecPoint.h"
e957fea8 51
d15a28e7 52ClassImp(AliPHOSEmcRecPoint)
53
54//____________________________________________________________________________
3663622c 55AliPHOSEmcRecPoint::AliPHOSEmcRecPoint() :
56 AliPHOSRecPoint(),
57 fCoreEnergy(0.), fDispersion(0.),
58 fEnergyList(0), fTime(-1.), fNExMax(0),
59 fM2x(0.), fM2z(0.), fM3x(0.), fM4z(0.),
60 fPhixe(0.), fDebug(0)
d15a28e7 61{
62 // ctor
d15a28e7 63 fMulDigit = 0 ;
64 fAmp = 0. ;
a6eedfad 65 fLocPos.SetX(1000000.) ; //Local position should be evaluated
83974468 66}
67
68//____________________________________________________________________________
3663622c 69AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const char * opt) :
70 AliPHOSRecPoint(opt),
71 fCoreEnergy(0.), fDispersion(0.),
72 fEnergyList(0), fTime(-1.), fNExMax(0),
73 fM2x(0.), fM2z(0.), fM3x(0.), fM4z(0.),
74 fPhixe(0.), fDebug(0)
73a68ccb 75{
76 // ctor
73a68ccb 77 fMulDigit = 0 ;
78 fAmp = 0. ;
73a68ccb 79 fLocPos.SetX(1000000.) ; //Local position should be evaluated
73a68ccb 80}
81
82//____________________________________________________________________________
3663622c 83AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(const AliPHOSEmcRecPoint & rp) :
84 AliPHOSRecPoint(rp),
85 fCoreEnergy(rp.fCoreEnergy), fDispersion(rp.fDispersion),
86 fEnergyList(0), fTime(rp.fTime), fNExMax(rp.fNExMax),
87 fM2x(rp.fM2x), fM2z(rp.fM2z), fM3x(rp.fM3x), fM4z(rp.fM4z),
88 fPhixe(rp.fPhixe), fDebug(rp.fDebug)
55fe9d13 89{
90 // cpy ctor
55fe9d13 91 fMulDigit = rp.fMulDigit ;
92 fAmp = rp.fAmp ;
55fe9d13 93 fEnergyList = new Float_t[rp.fMulDigit] ;
94 Int_t index ;
95 for(index = 0 ; index < fMulDigit ; index++)
96 fEnergyList[index] = rp.fEnergyList[index] ;
55fe9d13 97}
98
99//____________________________________________________________________________
83974468 100AliPHOSEmcRecPoint::~AliPHOSEmcRecPoint()
101{
88714635 102 // dtor
83974468 103 if ( fEnergyList )
104 delete[] fEnergyList ;
d15a28e7 105}
106
9f616d61 107//____________________________________________________________________________
83974468 108void AliPHOSEmcRecPoint::AddDigit(AliPHOSDigit & digit, Float_t Energy)
d15a28e7 109{
b2a60966 110 // Adds a digit to the RecPoint
a4e98857 111 // and accumulates the total amplitude and the multiplicity
d15a28e7 112
7932f811 113 if(fEnergyList == 0)
114 fEnergyList = new Float_t[fMaxDigit];
115
d15a28e7 116 if ( fMulDigit >= fMaxDigit ) { // increase the size of the lists
9f616d61 117 fMaxDigit*=2 ;
0fbb8738 118 Int_t * tempo = new Int_t[fMaxDigit];
119 Float_t * tempoE = new Float_t[fMaxDigit];
9f616d61 120
121 Int_t index ;
d15a28e7 122 for ( index = 0 ; index < fMulDigit ; index++ ){
83974468 123 tempo[index] = fDigitsList[index] ;
d15a28e7 124 tempoE[index] = fEnergyList[index] ;
125 }
126
9f616d61 127 delete [] fDigitsList ;
0fbb8738 128 fDigitsList = new Int_t[fMaxDigit];
9f616d61 129
130 delete [] fEnergyList ;
0fbb8738 131 fEnergyList = new Float_t[fMaxDigit];
9f616d61 132
133 for ( index = 0 ; index < fMulDigit ; index++ ){
134 fDigitsList[index] = tempo[index] ;
135 fEnergyList[index] = tempoE[index] ;
136 }
137
138 delete [] tempo ;
139 delete [] tempoE ;
140 } // if
d15a28e7 141
83974468 142 fDigitsList[fMulDigit] = digit.GetIndexInList() ;
143 fEnergyList[fMulDigit] = Energy ;
144 fMulDigit++ ;
d15a28e7 145 fAmp += Energy ;
7932f811 146
147 EvalPHOSMod(&digit) ;
d15a28e7 148}
149
150//____________________________________________________________________________
ad8cfaf4 151Bool_t AliPHOSEmcRecPoint::AreNeighbours(AliPHOSDigit * digit1, AliPHOSDigit * digit2 ) const
d15a28e7 152{
a4e98857 153 // Tells if (true) or not (false) two digits are neighbors
d15a28e7 154
155 Bool_t aren = kFALSE ;
156
686b771f 157 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
7b7c1533 158
d15a28e7 159 Int_t relid1[4] ;
92862013 160 phosgeom->AbsToRelNumbering(digit1->GetId(), relid1) ;
d15a28e7 161
162 Int_t relid2[4] ;
92862013 163 phosgeom->AbsToRelNumbering(digit2->GetId(), relid2) ;
d15a28e7 164
92862013 165 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
166 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
d15a28e7 167
92862013 168 if (( coldiff <= 1 ) && ( rowdiff <= 1 ) && (coldiff + rowdiff > 0))
d15a28e7 169 aren = kTRUE ;
170
171 return aren ;
172}
173
174//____________________________________________________________________________
2a941f4e 175Int_t AliPHOSEmcRecPoint::Compare(const TObject * obj) const
d15a28e7 176{
b2a60966 177 // Compares two RecPoints according to their position in the PHOS modules
686b771f 178
179 const Float_t delta = 1 ; //Width of "Sorting row". If you changibg this
7932f811 180 //value (what is senseless) change as vell delta in
181 //AliPHOSTrackSegmentMakerv* and other RecPoints...
d15a28e7 182 Int_t rv ;
183
184 AliPHOSEmcRecPoint * clu = (AliPHOSEmcRecPoint *)obj ;
185
186
ad8cfaf4 187 Int_t phosmod1 = GetPHOSMod() ;
92862013 188 Int_t phosmod2 = clu->GetPHOSMod() ;
d15a28e7 189
92862013 190 TVector3 locpos1;
7932f811 191 GetLocalPosition(locpos1) ;
92862013 192 TVector3 locpos2;
193 clu->GetLocalPosition(locpos2) ;
d15a28e7 194
92862013 195 if(phosmod1 == phosmod2 ) {
7932f811 196 Int_t rowdif = (Int_t)TMath::Ceil(locpos1.X()/delta)-(Int_t)TMath::Ceil(locpos2.X()/delta) ;
d15a28e7 197 if (rowdif> 0)
7932f811 198 rv = 1 ;
d15a28e7 199 else if(rowdif < 0)
7932f811 200 rv = -1 ;
92862013 201 else if(locpos1.Z()>locpos2.Z())
d15a28e7 202 rv = -1 ;
203 else
204 rv = 1 ;
205 }
206
207 else {
92862013 208 if(phosmod1 < phosmod2 )
d15a28e7 209 rv = -1 ;
210 else
211 rv = 1 ;
212 }
213
214 return rv ;
215}
9f616d61 216//______________________________________________________________________________
702ab87e 217void AliPHOSEmcRecPoint::ExecuteEvent(Int_t event, Int_t, Int_t) /*const*/
9f616d61 218{
9f616d61 219
9688c1dd 220 // Execute action corresponding to one event
221 // This member function is called when a AliPHOSRecPoint is clicked with the locator
222 //
223 // If Left button is clicked on AliPHOSRecPoint, the digits are switched on
224 // and switched off when the mouse button is released.
225
88cb7938 226
686b771f 227 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
83974468 228
9688c1dd 229 static TGraph * digitgraph = 0 ;
83974468 230
9688c1dd 231 if (!gPad->IsEditable()) return;
83974468 232
9688c1dd 233 TH2F * histo = 0 ;
234 TCanvas * histocanvas ;
235
88cb7938 236
237 //try to get run loader from default event folder
e191bb57 238 AliRunLoader* rn = AliRunLoader::GetRunLoader(AliConfig::GetDefaultEventFolderName());
88cb7938 239 if (rn == 0x0)
240 {
351dd634 241 AliError(Form("Cannot find Run Loader in Default Event Folder"));
88cb7938 242 return;
243 }
244 AliPHOSLoader* gime = dynamic_cast<AliPHOSLoader*>(rn->GetLoader("PHOSLoader"));
245 if (gime == 0x0)
246 {
351dd634 247 AliError(Form("Cannot find PHOS Loader from Run Loader"));
88cb7938 248 return;
249 }
250
251
afa51c4e 252 const TClonesArray * digits = gime->Digits() ;
9688c1dd 253
254 switch (event) {
83974468 255
9688c1dd 256 case kButton1Down: {
257 AliPHOSDigit * digit ;
258 Int_t iDigit;
259 Int_t relid[4] ;
83974468 260
9688c1dd 261 const Int_t kMulDigit = AliPHOSEmcRecPoint::GetDigitsMultiplicity() ;
262 Float_t * xi = new Float_t[kMulDigit] ;
263 Float_t * zi = new Float_t[kMulDigit] ;
83974468 264
9688c1dd 265 // create the histogram for the single cluster
266 // 1. gets histogram boundaries
267 Float_t ximax = -999. ;
268 Float_t zimax = -999. ;
269 Float_t ximin = 999. ;
270 Float_t zimin = 999. ;
83974468 271
9688c1dd 272 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
273 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
274 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
275 phosgeom->RelPosInModule(relid, xi[iDigit], zi[iDigit]);
276 if ( xi[iDigit] > ximax )
277 ximax = xi[iDigit] ;
278 if ( xi[iDigit] < ximin )
279 ximin = xi[iDigit] ;
280 if ( zi[iDigit] > zimax )
281 zimax = zi[iDigit] ;
282 if ( zi[iDigit] < zimin )
283 zimin = zi[iDigit] ;
284 }
285 ximax += phosgeom->GetCrystalSize(0) / 2. ;
286 zimax += phosgeom->GetCrystalSize(2) / 2. ;
287 ximin -= phosgeom->GetCrystalSize(0) / 2. ;
288 zimin -= phosgeom->GetCrystalSize(2) / 2. ;
289 Int_t xdim = (int)( (ximax - ximin ) / phosgeom->GetCrystalSize(0) + 0.5 ) ;
290 Int_t zdim = (int)( (zimax - zimin ) / phosgeom->GetCrystalSize(2) + 0.5 ) ;
83974468 291
9688c1dd 292 // 2. gets the histogram title
83974468 293
9688c1dd 294 Text_t title[100] ;
295 sprintf(title,"Energy=%1.2f GeV ; Digits ; %d ", GetEnergy(), GetDigitsMultiplicity()) ;
83974468 296
9688c1dd 297 if (!histo) {
298 delete histo ;
299 histo = 0 ;
300 }
301 histo = new TH2F("cluster3D", title, xdim, ximin, ximax, zdim, zimin, zimax) ;
83974468 302
9688c1dd 303 Float_t x, z ;
304 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
305 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
306 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
307 phosgeom->RelPosInModule(relid, x, z);
308 histo->Fill(x, z, fEnergyList[iDigit] ) ;
309 }
83974468 310
9688c1dd 311 if (!digitgraph) {
312 digitgraph = new TGraph(kMulDigit,xi,zi);
313 digitgraph-> SetMarkerStyle(5) ;
314 digitgraph-> SetMarkerSize(1.) ;
315 digitgraph-> SetMarkerColor(1) ;
316 digitgraph-> Paint("P") ;
317 }
83974468 318
9688c1dd 319 // Print() ;
320 histocanvas = new TCanvas("cluster", "a single cluster", 600, 500) ;
321 histocanvas->Draw() ;
322 histo->Draw("lego1") ;
83974468 323
9688c1dd 324 delete[] xi ;
325 delete[] zi ;
83974468 326
9688c1dd 327 break;
328 }
83974468 329
9688c1dd 330 case kButton1Up:
331 if (digitgraph) {
332 delete digitgraph ;
333 digitgraph = 0 ;
334 }
335 break;
9f616d61 336
9688c1dd 337 }
9f616d61 338}
339
d15a28e7 340//____________________________________________________________________________
7932f811 341void AliPHOSEmcRecPoint::EvalDispersion(Float_t logWeight,TClonesArray * digits)
d15a28e7 342{
b2a60966 343 // Calculates the dispersion of the shower at the origine of the RecPoint
344
e5b16749 345 Float_t d = 0. ;
346 Float_t wtot = 0. ;
d15a28e7 347
d084d50d 348 Float_t x = 0.;
349 Float_t z = 0.;
d15a28e7 350
351 AliPHOSDigit * digit ;
7b7c1533 352
686b771f 353 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
e5b16749 354
355 // Calculates the center of gravity in the local PHOS-module coordinates
356
d15a28e7 357 Int_t iDigit;
e5b16749 358
359 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
360 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
361 Int_t relid[4] ;
362 Float_t xi ;
363 Float_t zi ;
364 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
365 phosgeom->RelPosInModule(relid, xi, zi);
f33a3764 366 if (fAmp>0 && fEnergyList[iDigit]>0) {
367 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
368 x += xi * w ;
369 z += zi * w ;
370 wtot += w ;
371 }
372 else
373 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
e5b16749 374 }
f33a3764 375 if (wtot>0) {
376 x /= wtot ;
377 z /= wtot ;
378 }
379 else
380 AliError(Form("Wrong weight %f\n", wtot));
e5b16749 381
382
383// Calculates the dispersion in coordinates
384 wtot = 0.;
88714635 385 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
7932f811 386 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
d15a28e7 387 Int_t relid[4] ;
388 Float_t xi ;
389 Float_t zi ;
92862013 390 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
391 phosgeom->RelPosInModule(relid, xi, zi);
f33a3764 392 if (fAmp>0 && fEnergyList[iDigit]>0) {
393 Float_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
394 d += w*((xi-x)*(xi-x) + (zi-z)*(zi-z) ) ;
395 wtot+=w ;
396 }
397 else
398 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
d15a28e7 399 }
e5b16749 400
7932f811 401
f33a3764 402 if (wtot>0) {
403 d /= wtot ;
404 }
405 else
406 AliError(Form("Wrong weight %f\n", wtot));
d15a28e7 407
f33a3764 408 fDispersion = 0;
409 if (d>=0)
410 fDispersion = TMath::Sqrt(d) ;
c63c49e9 411
d15a28e7 412}
fad3e5b9 413//______________________________________________________________________________
e5b16749 414void AliPHOSEmcRecPoint::EvalCoreEnergy(Float_t logWeight, TClonesArray * digits)
fad3e5b9 415{
a4e98857 416 // This function calculates energy in the core,
417 // i.e. within a radius rad = 3cm around the center. Beyond this radius
418 // in accordance with shower profile the energy deposition
fad3e5b9 419 // should be less than 2%
420
fad3e5b9 421 Float_t coreRadius = 3 ;
422
e5b16749 423 Float_t x = 0 ;
424 Float_t z = 0 ;
fad3e5b9 425
426 AliPHOSDigit * digit ;
7b7c1533 427
686b771f 428 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
88cb7938 429
fad3e5b9 430 Int_t iDigit;
e5b16749 431
432// Calculates the center of gravity in the local PHOS-module coordinates
433 Float_t wtot = 0;
434 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
435 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
436 Int_t relid[4] ;
437 Float_t xi ;
438 Float_t zi ;
439 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
440 phosgeom->RelPosInModule(relid, xi, zi);
f33a3764 441 if (fAmp>0 && fEnergyList[iDigit]>0) {
442 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
443 x += xi * w ;
444 z += zi * w ;
445 wtot += w ;
446 }
447 else
448 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
e5b16749 449 }
f33a3764 450 if (wtot>0) {
451 x /= wtot ;
452 z /= wtot ;
453 }
454 else
455 AliError(Form("Wrong weight %f\n", wtot));
e5b16749 456
457
fad3e5b9 458 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
7932f811 459 digit = (AliPHOSDigit *) ( digits->At(fDigitsList[iDigit]) ) ;
fad3e5b9 460 Int_t relid[4] ;
461 Float_t xi ;
462 Float_t zi ;
463 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
464 phosgeom->RelPosInModule(relid, xi, zi);
465 Float_t distance = TMath::Sqrt((xi-x)*(xi-x)+(zi-z)*(zi-z)) ;
466 if(distance < coreRadius)
7932f811 467 fCoreEnergy += fEnergyList[iDigit] ;
fad3e5b9 468 }
469
fad3e5b9 470}
d15a28e7 471
472//____________________________________________________________________________
7932f811 473void AliPHOSEmcRecPoint::EvalElipsAxis(Float_t logWeight,TClonesArray * digits)
d15a28e7 474{
b2a60966 475 // Calculates the axis of the shower ellipsoid
83974468 476
e8dbb96e 477 Double_t wtot = 0. ;
478 Double_t x = 0.;
479 Double_t z = 0.;
480 Double_t dxx = 0.;
481 Double_t dzz = 0.;
482 Double_t dxz = 0.;
d15a28e7 483
484 AliPHOSDigit * digit ;
7b7c1533 485
686b771f 486 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance();
7b7c1533 487
d15a28e7 488 Int_t iDigit;
489
e5b16749 490
d15a28e7 491 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
7932f811 492 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
d15a28e7 493 Int_t relid[4] ;
494 Float_t xi ;
495 Float_t zi ;
92862013 496 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
497 phosgeom->RelPosInModule(relid, xi, zi);
f33a3764 498 if (fAmp>0 && fEnergyList[iDigit]>0) {
499 Double_t w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
500 dxx += w * xi * xi ;
501 x += w * xi ;
502 dzz += w * zi * zi ;
503 z += w * zi ;
504 dxz += w * xi * zi ;
505 wtot += w ;
506 }
507 else
508 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
d15a28e7 509 }
f33a3764 510 if (wtot>0) {
511 dxx /= wtot ;
512 x /= wtot ;
513 dxx -= x * x ;
514 dzz /= wtot ;
515 z /= wtot ;
516 dzz -= z * z ;
517 dxz /= wtot ;
518 dxz -= x * z ;
d15a28e7 519
69183710 520// //Apply correction due to non-perpendicular incidence
521// Double_t CosX ;
522// Double_t CosZ ;
88cb7938 523// AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
7b7c1533 524// AliPHOSGeometry * phosgeom = (AliPHOSGeometry*)gime->PHOSGeometry();
525 // Double_t DistanceToIP= (Double_t ) phosgeom->GetIPtoCrystalSurface() ;
69183710 526
527// CosX = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+x*x) ;
528// CosZ = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+z*z) ;
529
530// dxx = dxx/(CosX*CosX) ;
531// dzz = dzz/(CosZ*CosZ) ;
532// dxz = dxz/(CosX*CosZ) ;
533
534
f33a3764 535 fLambda[0] = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
536 if(fLambda[0] > 0)
537 fLambda[0] = TMath::Sqrt(fLambda[0]) ;
e8dbb96e 538
f33a3764 539 fLambda[1] = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
540 if(fLambda[1] > 0) //To avoid exception if numerical errors lead to negative lambda.
541 fLambda[1] = TMath::Sqrt(fLambda[1]) ;
542 else
543 fLambda[1]= 0. ;
544 }
545 else {
546 AliError(Form("Wrong weight %f\n", wtot));
547 fLambda[0]=fLambda[1]=0.;
548 }
d15a28e7 549}
550
551//____________________________________________________________________________
ce2a9a95 552void AliPHOSEmcRecPoint::EvalMoments(Float_t logWeight,TClonesArray * digits)
553{
554 // Calculate the shower moments in the eigen reference system
555 // M2x, M2z, M3x, M4z
556 // Calculate the angle between the shower position vector and the eigen vector
557
558 Double_t wtot = 0. ;
559 Double_t x = 0.;
560 Double_t z = 0.;
561 Double_t dxx = 0.;
562 Double_t dzz = 0.;
563 Double_t dxz = 0.;
564 Double_t lambda0=0, lambda1=0;
565
566 AliPHOSDigit * digit ;
567
686b771f 568 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
ce2a9a95 569
570 Int_t iDigit;
571
572 // 1) Find covariance matrix elements:
573 // || dxx dxz ||
574 // || dxz dzz ||
575
576 Float_t xi ;
577 Float_t zi ;
578 Int_t relid[4] ;
579 Double_t w;
580 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
581 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
582 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
583 phosgeom->RelPosInModule(relid, xi, zi);
f33a3764 584 if (fAmp>0 && fEnergyList[iDigit]>0) {
585 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
586 x += w * xi ;
587 z += w * zi ;
588 dxx += w * xi * xi ;
589 dzz += w * zi * zi ;
590 dxz += w * xi * zi ;
591 wtot += w ;
592 }
593 else
594 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
595
ce2a9a95 596 }
f33a3764 597 if (wtot>0) {
598 x /= wtot ;
599 z /= wtot ;
600 dxx /= wtot ;
601 dzz /= wtot ;
602 dxz /= wtot ;
603 dxx -= x * x ;
604 dzz -= z * z ;
605 dxz -= x * z ;
ce2a9a95 606
607 // 2) Find covariance matrix eigen values lambda0 and lambda1
608
f33a3764 609 lambda0 = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
610 lambda1 = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
611 }
612 else {
613 AliError(Form("Wrong weight %f\n", wtot));
614 lambda0=lambda1=0.;
615 }
ce2a9a95 616
617 // 3) Find covariance matrix eigen vectors e0 and e1
618
619 TVector2 e0,e1;
620 if (dxz != 0)
621 e0.Set(1.,(lambda0-dxx)/dxz);
622 else
623 e0.Set(0.,1.);
624
625 e0 = e0.Unit();
626 e1.Set(-e0.Y(),e0.X());
627
628 // 4) Rotate cluster tensor from (x,z) to (e0,e1) system
629 // and calculate moments M3x and M4z
630
631 Float_t cosPhi = e0.X();
632 Float_t sinPhi = e0.Y();
633
634 Float_t xiPHOS ;
635 Float_t ziPHOS ;
636 Double_t dx3, dz3, dz4;
637 wtot = 0.;
638 x = 0.;
639 z = 0.;
640 dxx = 0.;
641 dzz = 0.;
642 dxz = 0.;
643 dx3 = 0.;
644 dz3 = 0.;
645 dz4 = 0.;
646 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
647 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
648 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
649 phosgeom->RelPosInModule(relid, xiPHOS, ziPHOS);
650 xi = xiPHOS*cosPhi + ziPHOS*sinPhi;
651 zi = ziPHOS*cosPhi - xiPHOS*sinPhi;
f33a3764 652 if (fAmp>0 && fEnergyList[iDigit]>0) {
653 w = TMath::Max(0.,logWeight+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
654 x += w * xi ;
655 z += w * zi ;
656 dxx += w * xi * xi ;
657 dzz += w * zi * zi ;
658 dxz += w * xi * zi ;
659 dx3 += w * xi * xi * xi;
660 dz3 += w * zi * zi * zi ;
661 dz4 += w * zi * zi * zi * zi ;
662 wtot += w ;
663 }
664 else
665 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
ce2a9a95 666 }
f33a3764 667 if (wtot>0) {
668 x /= wtot ;
669 z /= wtot ;
670 dxx /= wtot ;
671 dzz /= wtot ;
672 dxz /= wtot ;
673 dx3 /= wtot ;
674 dz3 /= wtot ;
675 dz4 /= wtot ;
676 dx3 += -3*dxx*x + 2*x*x*x;
677 dz4 += -4*dz3*z + 6*dzz*z*z -3*z*z*z*z;
678 dxx -= x * x ;
679 dzz -= z * z ;
680 dxz -= x * z ;
681 }
682 else
683 AliError(Form("Wrong weight %f\n", wtot));
ce2a9a95 684
685 // 5) Find an angle between cluster center vector and eigen vector e0
686
f33a3764 687 Float_t phi = 0;
688 if ( (x*x+z*z) > 0 )
689 phi = TMath::ACos ((x*e0.X() + z*e0.Y()) / sqrt(x*x + z*z));
ce2a9a95 690
691 fM2x = lambda0;
692 fM2z = lambda1;
693 fM3x = dx3;
694 fM4z = dz4;
695 fPhixe = phi;
696
697}
698//____________________________________________________________________________
7932f811 699void AliPHOSEmcRecPoint::EvalAll(Float_t logWeight, TClonesArray * digits )
ad8cfaf4 700{
baef0810 701 // Evaluates all shower parameters
7932f811 702 EvalLocalPosition(logWeight, digits) ;
703 EvalElipsAxis(logWeight, digits) ;
ce2a9a95 704 EvalMoments(logWeight, digits) ;
7932f811 705 EvalDispersion(logWeight, digits) ;
e5b16749 706 EvalCoreEnergy(logWeight, digits);
a6eedfad 707 EvalTime(digits) ;
e957fea8 708 AliPHOSRecPoint::EvalAll(digits) ;
ad8cfaf4 709}
710//____________________________________________________________________________
7932f811 711void AliPHOSEmcRecPoint::EvalLocalPosition(Float_t logWeight, TClonesArray * digits)
b2a60966 712{
713 // Calculates the center of gravity in the local PHOS-module coordinates
b2a60966 714 Float_t wtot = 0. ;
715
716 Int_t relid[4] ;
717
718 Float_t x = 0. ;
719 Float_t z = 0. ;
720
721 AliPHOSDigit * digit ;
722
686b771f 723 AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
b2a60966 724
725 Int_t iDigit;
726
b2a60966 727 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
7932f811 728 digit = (AliPHOSDigit *) digits->At(fDigitsList[iDigit]) ;
b2a60966 729
730 Float_t xi ;
731 Float_t zi ;
732 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
733 phosgeom->RelPosInModule(relid, xi, zi);
f33a3764 734 if (fAmp>0 && fEnergyList[iDigit]>0) {
735 Float_t w = TMath::Max( 0., logWeight + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
736 x += xi * w ;
737 z += zi * w ;
738 wtot += w ;
739 }
740 else
741 AliError(Form("Wrong energy %f and/or amplitude %f\n", fEnergyList[iDigit], fAmp));
9ce1a8d9 742 }
f33a3764 743 if (wtot>0) {
744 x /= wtot ;
745 z /= wtot ;
746 }
747 else
748 AliError(Form("Wrong weight %f\n", wtot));
ad8cfaf4 749
750 // Correction for the depth of the shower starting point (TDR p 127)
751 Float_t para = 0.925 ;
752 Float_t parb = 6.52 ;
753
1b799736 754 Float_t xo,yo,zo ; //Coordinates of the origin
686b771f 755 //We should check all 3 possibilities to avoid seg.v.
756 if(gAlice && gAlice->GetMCApp() && gAlice->Generator())
757 gAlice->Generator()->GetOrigin(xo,yo,zo) ;
758 else{
759 xo=yo=zo=0.;
760 }
5830e1d9 761 Float_t phi = phosgeom->GetPHOSAngle(relid[0]) ;
1b799736 762
763 //Transform to the local ref.frame
764 Float_t xoL,yoL ;
765 xoL = xo*TMath::Cos(phi)-yo*TMath::Sin(phi) ;
766 yoL = xo*TMath::Sin(phi)+yo*TMath::Cos(phi) ;
767
fd84cb73 768 Float_t radius = phosgeom->GetIPtoCrystalSurface()-yoL;
1b799736 769
770 Float_t incidencephi = TMath::ATan((x-xoL ) / radius) ;
771 Float_t incidencetheta = TMath::ATan((z-zo) / radius) ;
ad8cfaf4 772
f33a3764 773 Float_t depthx = 0.;
774 Float_t depthz = 0.;
775 if (fAmp>0) {
776 depthx = ( para * TMath::Log(fAmp) + parb ) * TMath::Sin(incidencephi) ;
777 depthz = ( para * TMath::Log(fAmp) + parb ) * TMath::Sin(incidencetheta) ;
778 }
779 else
780 AliError(Form("Wrong amplitude %f\n", fAmp));
ad8cfaf4 781
782 fLocPos.SetX(x - depthx) ;
b2a60966 783 fLocPos.SetY(0.) ;
ad8cfaf4 784 fLocPos.SetZ(z - depthz) ;
b2a60966 785
a6eedfad 786 fLocPosM = 0 ;
b2a60966 787}
788
789//____________________________________________________________________________
ad8cfaf4 790Float_t AliPHOSEmcRecPoint::GetMaximalEnergy(void) const
d15a28e7 791{
b2a60966 792 // Finds the maximum energy in the cluster
793
d15a28e7 794 Float_t menergy = 0. ;
795
796 Int_t iDigit;
797
798 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
799
800 if(fEnergyList[iDigit] > menergy)
801 menergy = fEnergyList[iDigit] ;
802 }
803 return menergy ;
804}
805
806//____________________________________________________________________________
fc7e2f43 807Int_t AliPHOSEmcRecPoint::GetMultiplicityAtLevel(Float_t H) const
d15a28e7 808{
b2a60966 809 // Calculates the multiplicity of digits with energy larger than H*energy
810
d15a28e7 811 Int_t multipl = 0 ;
812 Int_t iDigit ;
813 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
814
815 if(fEnergyList[iDigit] > H * fAmp)
816 multipl++ ;
817 }
818 return multipl ;
819}
820
821//____________________________________________________________________________
a0636361 822Int_t AliPHOSEmcRecPoint::GetNumberOfLocalMax( AliPHOSDigit ** maxAt, Float_t * maxAtEnergy,
7932f811 823 Float_t locMaxCut,TClonesArray * digits) const
d15a28e7 824{
b2a60966 825 // Calculates the number of local maxima in the cluster using fLocalMaxCut as the minimum
a4e98857 826 // energy difference between two local maxima
b2a60966 827
d15a28e7 828 AliPHOSDigit * digit ;
829 AliPHOSDigit * digitN ;
830
831
832 Int_t iDigitN ;
833 Int_t iDigit ;
834
7932f811 835 for(iDigit = 0; iDigit < fMulDigit; iDigit++)
a0636361 836 maxAt[iDigit] = (AliPHOSDigit*) digits->At(fDigitsList[iDigit]) ;
7932f811 837
d15a28e7 838
6ad0bfa0 839 for(iDigit = 0 ; iDigit < fMulDigit; iDigit++) {
a0636361 840 if(maxAt[iDigit]) {
841 digit = maxAt[iDigit] ;
83974468 842
6ad0bfa0 843 for(iDigitN = 0; iDigitN < fMulDigit; iDigitN++) {
686b771f 844 if(iDigit == iDigitN)
845 continue ;
846
7932f811 847 digitN = (AliPHOSDigit *) digits->At(fDigitsList[iDigitN]) ;
d15a28e7 848
9f616d61 849 if ( AreNeighbours(digit, digitN) ) {
d15a28e7 850 if (fEnergyList[iDigit] > fEnergyList[iDigitN] ) {
a0636361 851 maxAt[iDigitN] = 0 ;
6ad0bfa0 852 // but may be digit too is not local max ?
7932f811 853 if(fEnergyList[iDigit] < fEnergyList[iDigitN] + locMaxCut)
a0636361 854 maxAt[iDigit] = 0 ;
d15a28e7 855 }
856 else {
a0636361 857 maxAt[iDigit] = 0 ;
6ad0bfa0 858 // but may be digitN too is not local max ?
7932f811 859 if(fEnergyList[iDigit] > fEnergyList[iDigitN] - locMaxCut)
a0636361 860 maxAt[iDigitN] = 0 ;
d15a28e7 861 }
862 } // if Areneighbours
863 } // while digitN
864 } // slot not empty
865 } // while digit
866
867 iDigitN = 0 ;
6ad0bfa0 868 for(iDigit = 0; iDigit < fMulDigit; iDigit++) {
a0636361 869 if(maxAt[iDigit]){
d15a28e7 870 maxAt[iDigitN] = maxAt[iDigit] ;
9f616d61 871 maxAtEnergy[iDigitN] = fEnergyList[iDigit] ;
872 iDigitN++ ;
d15a28e7 873 }
874 }
875 return iDigitN ;
876}
9688c1dd 877//____________________________________________________________________________
0bc3b8ed 878void AliPHOSEmcRecPoint::EvalTime(TClonesArray * digits)
879{
880 // Define a rec.point time as a time in the cell with the maximum energy
881
9688c1dd 882 Float_t maxE = 0;
883 Int_t maxAt = 0;
884 for(Int_t idig=0; idig < fMulDigit; idig++){
885 if(fEnergyList[idig] > maxE){
886 maxE = fEnergyList[idig] ;
887 maxAt = idig;
888 }
889 }
890 fTime = ((AliPHOSDigit*) digits->At(fDigitsList[maxAt]))->GetTime() ;
891
892}
d15a28e7 893//____________________________________________________________________________
092b50ba 894void AliPHOSEmcRecPoint::Purify(Float_t threshold){
895 //Removes digits below threshold
896
0fbb8738 897 Int_t * tempo = new Int_t[fMaxDigit];
898 Float_t * tempoE = new Float_t[fMaxDigit];
092b50ba 899
900 Int_t mult = 0 ;
901 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
902 if(fEnergyList[iDigit] > threshold){
903 tempo[mult] = fDigitsList[iDigit] ;
904 tempoE[mult] = fEnergyList[iDigit] ;
905 mult++ ;
906 }
907 }
908
909 fMulDigit = mult ;
910 delete [] fDigitsList ;
911 delete [] fEnergyList ;
0fbb8738 912 fDigitsList = new Int_t[fMulDigit];
913 fEnergyList = new Float_t[fMulDigit];
092b50ba 914
0458aa58 915 fAmp = 0.; //Recalculate total energy
092b50ba 916 for(Int_t iDigit=0;iDigit< fMulDigit ;iDigit++){
0458aa58 917 fDigitsList[iDigit] = tempo[iDigit];
918 fEnergyList[iDigit] = tempoE[iDigit] ;
919 fAmp+=tempoE[iDigit];
092b50ba 920 }
921
922 delete [] tempo ;
923 delete [] tempoE ;
924
925}
926//____________________________________________________________________________
a8c47ab6 927void AliPHOSEmcRecPoint::Print(Option_t *) const
d15a28e7 928{
b2a60966 929 // Print the list of digits belonging to the cluster
930
21cd0c07 931 TString message ;
932 message = "AliPHOSEmcRecPoint:\n" ;
933 message += " digits # = " ;
351dd634 934 AliInfo(Form(message.Data())) ;
d15a28e7 935
d15a28e7 936 Int_t iDigit;
7932f811 937 for(iDigit=0; iDigit<fMulDigit; iDigit++)
53ad38d8 938 printf(" %d ", fDigitsList[iDigit] ) ;
7932f811 939
351dd634 940 printf(" Energies = ") ;
7932f811 941 for(iDigit=0; iDigit<fMulDigit; iDigit++)
53ad38d8 942 printf(" %f ", fEnergyList[iDigit] ) ;
943 printf("\n") ;
351dd634 944 printf(" Primaries ") ;
bc68d12c 945 for(iDigit = 0;iDigit < fMulTrack; iDigit++)
53ad38d8 946 printf(" %d ", fTracksList[iDigit]) ;
947 printf("\n") ;
21cd0c07 948 message = " Multiplicity = %d" ;
949 message += " Cluster Energy = %f" ;
950 message += " Number of primaries %d" ;
951 message += " Stored at position %d" ;
83974468 952
351dd634 953 printf(message.Data(), fMulDigit, fAmp, fMulTrack,GetIndexInList() ) ;
d15a28e7 954}
88714635 955
7932f811 956