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1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18//_________________________________________________________________________
19// RecPoint implementation for PHOS-EMC
20// An EmcRecPoint is a cluster of digits
21//
22//*-- Author: Dmitri Peressounko (RRC KI & SUBATECH)
23
24
25// --- ROOT system ---
26#include "TPad.h"
27#include "TH2.h"
28#include "TMath.h"
29#include "TCanvas.h"
30
31// --- Standard library ---
32
33#include <iostream.h>
34
35// --- AliRoot header files ---
36
37#include "AliPHOSGeometry.h"
38#include "AliPHOSEmcRecPoint.h"
39#include "AliRun.h"
40#include "AliPHOSIndexToObject.h"
41
42ClassImp(AliPHOSEmcRecPoint)
43
44//____________________________________________________________________________
45AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(Float_t W0, Float_t LocMaxCut)
46 : AliPHOSRecPoint()
47{
48 // ctor
49
50 fMulDigit = 0 ;
51 fAmp = 0. ;
52 fEnergyList = new Float_t[fMaxDigit];
53 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
54 fDelta = phosgeom->GetCrystalSize(0) ;
55 fW0 = W0 ;
56 fLocMaxCut = LocMaxCut ;
57 fLocPos.SetX(1000000.) ; //Local position should be evaluated
58
59}
60
61//____________________________________________________________________________
62AliPHOSEmcRecPoint::~AliPHOSEmcRecPoint()
63{
64 // dtor
65 if ( fEnergyList )
66 delete[] fEnergyList ;
67}
68
69//____________________________________________________________________________
70void AliPHOSEmcRecPoint::AddDigit(AliPHOSDigit & digit, Float_t Energy)
71{
72 // Adds a digit to the RecPoint
73 // and accumulates the total amplitude and the multiplicity
74
75 if ( fMulDigit >= fMaxDigit ) { // increase the size of the lists
76 fMaxDigit*=2 ;
77 Int_t * tempo = new ( Int_t[fMaxDigit] ) ;
78 Float_t * tempoE = new ( Float_t[fMaxDigit] ) ;
79
80 Int_t index ;
81 for ( index = 0 ; index < fMulDigit ; index++ ){
82 tempo[index] = fDigitsList[index] ;
83 tempoE[index] = fEnergyList[index] ;
84 }
85
86 delete [] fDigitsList ;
87 fDigitsList = new ( Int_t[fMaxDigit] ) ;
88
89 delete [] fEnergyList ;
90 fEnergyList = new ( Float_t[fMaxDigit] ) ;
91
92 for ( index = 0 ; index < fMulDigit ; index++ ){
93 fDigitsList[index] = tempo[index] ;
94 fEnergyList[index] = tempoE[index] ;
95 }
96
97 delete [] tempo ;
98 delete [] tempoE ;
99 } // if
100
101 fDigitsList[fMulDigit] = digit.GetIndexInList() ;
102 fEnergyList[fMulDigit] = Energy ;
103 fMulDigit++ ;
104 fAmp += Energy ;
105}
106
107//____________________________________________________________________________
108Bool_t AliPHOSEmcRecPoint::AreNeighbours(AliPHOSDigit * digit1, AliPHOSDigit * digit2 )
109{
110 // Tells if (true) or not (false) two digits are neighbors)
111
112 Bool_t aren = kFALSE ;
113
114 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
115 Int_t relid1[4] ;
116 phosgeom->AbsToRelNumbering(digit1->GetId(), relid1) ;
117
118 Int_t relid2[4] ;
119 phosgeom->AbsToRelNumbering(digit2->GetId(), relid2) ;
120
121 Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
122 Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
123
124 if (( coldiff <= 1 ) && ( rowdiff <= 1 ) && (coldiff + rowdiff > 0))
125 aren = kTRUE ;
126
127 return aren ;
128}
129
130//____________________________________________________________________________
131Int_t AliPHOSEmcRecPoint::Compare(const TObject * obj) const
132{
133 // Compares two RecPoints according to their position in the PHOS modules
134
135 Int_t rv ;
136
137 AliPHOSEmcRecPoint * clu = (AliPHOSEmcRecPoint *)obj ;
138
139
140 Int_t phosmod1 = this->GetPHOSMod() ;
141 Int_t phosmod2 = clu->GetPHOSMod() ;
142
143 TVector3 locpos1;
144 this->GetLocalPosition(locpos1) ;
145 TVector3 locpos2;
146 clu->GetLocalPosition(locpos2) ;
147
148 if(phosmod1 == phosmod2 ) {
149 Int_t rowdif = (Int_t)TMath::Ceil(locpos1.X()/fDelta)-(Int_t)TMath::Ceil(locpos2.X()/fDelta) ;
150 if (rowdif> 0)
151 rv = -1 ;
152 else if(rowdif < 0)
153 rv = 1 ;
154 else if(locpos1.Z()>locpos2.Z())
155 rv = -1 ;
156 else
157 rv = 1 ;
158 }
159
160 else {
161 if(phosmod1 < phosmod2 )
162 rv = -1 ;
163 else
164 rv = 1 ;
165 }
166
167 return rv ;
168}
169
170//______________________________________________________________________________
171void AliPHOSEmcRecPoint::ExecuteEvent(Int_t event, Int_t px, Int_t py)
172{
173 // Execute action corresponding to one event
174 // This member function is called when a AliPHOSRecPoint is clicked with the locator
175 //
176 // If Left button is clicked on AliPHOSRecPoint, the digits are switched on
177 // and switched off when the mouse button is released.
178 //
179
180 // static Int_t pxold, pyold;
181
182 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
183
184 static TGraph * digitgraph = 0 ;
185
186 if (!gPad->IsEditable()) return;
187
188 TH2F * histo = 0 ;
189 TCanvas * histocanvas ;
190
191 switch (event) {
192
193 case kButton1Down: {
194 AliPHOSDigit * digit ;
195 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
196 Int_t iDigit;
197 Int_t relid[4] ;
198
199 const Int_t kMulDigit = AliPHOSEmcRecPoint::GetDigitsMultiplicity() ;
200 Float_t * xi = new Float_t[kMulDigit] ;
201 Float_t * zi = new Float_t[kMulDigit] ;
202
203 // create the histogram for the single cluster
204 // 1. gets histogram boundaries
205 Float_t ximax = -999. ;
206 Float_t zimax = -999. ;
207 Float_t ximin = 999. ;
208 Float_t zimin = 999. ;
209
210 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
211 digit = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigit]) ) ;
212 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
213 phosgeom->RelPosInModule(relid, xi[iDigit], zi[iDigit]);
214 if ( xi[iDigit] > ximax )
215 ximax = xi[iDigit] ;
216 if ( xi[iDigit] < ximin )
217 ximin = xi[iDigit] ;
218 if ( zi[iDigit] > zimax )
219 zimax = zi[iDigit] ;
220 if ( zi[iDigit] < zimin )
221 zimin = zi[iDigit] ;
222 }
223 ximax += phosgeom->GetCrystalSize(0) / 2. ;
224 zimax += phosgeom->GetCrystalSize(2) / 2. ;
225 ximin -= phosgeom->GetCrystalSize(0) / 2. ;
226 zimin -= phosgeom->GetCrystalSize(2) / 2. ;
227 Int_t xdim = (int)( (ximax - ximin ) / phosgeom->GetCrystalSize(0) + 0.5 ) ;
228 Int_t zdim = (int)( (zimax - zimin ) / phosgeom->GetCrystalSize(2) + 0.5 ) ;
229
230 // 2. gets the histogram title
231
232 Text_t title[100] ;
233 sprintf(title,"Energy=%1.2f GeV ; Digits ; %d ", GetEnergy(), GetDigitsMultiplicity()) ;
234
235 if (!histo) {
236 delete histo ;
237 histo = 0 ;
238 }
239 histo = new TH2F("cluster3D", title, xdim, ximin, ximax, zdim, zimin, zimax) ;
240
241 Float_t x, z ;
242 for(iDigit=0; iDigit<kMulDigit; iDigit++) {
243 digit = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigit]) ) ;
244 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
245 phosgeom->RelPosInModule(relid, x, z);
246 histo->Fill(x, z, fEnergyList[iDigit] ) ;
247 }
248
249 if (!digitgraph) {
250 digitgraph = new TGraph(kMulDigit,xi,zi);
251 digitgraph-> SetMarkerStyle(5) ;
252 digitgraph-> SetMarkerSize(1.) ;
253 digitgraph-> SetMarkerColor(1) ;
254 digitgraph-> Paint("P") ;
255 }
256
257 Print() ;
258 histocanvas = new TCanvas("cluser", "a single cluster", 600, 500) ;
259 histocanvas->Draw() ;
260 histo->Draw("lego1") ;
261
262 delete[] xi ;
263 delete[] zi ;
264
265 break;
266 }
267
268 case kButton1Up:
269 if (digitgraph) {
270 delete digitgraph ;
271 digitgraph = 0 ;
272 }
273 break;
274
275 }
276}
277
278//____________________________________________________________________________
279Float_t AliPHOSEmcRecPoint::GetDispersion()
280{
281 // Calculates the dispersion of the shower at the origine of the RecPoint
282
283 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
284
285 Float_t d = 0 ;
286 Float_t wtot = 0 ;
287
288 TVector3 locpos;
289 GetLocalPosition(locpos);
290 Float_t x = locpos.X() ;
291 Float_t z = locpos.Z() ;
292
293 AliPHOSDigit * digit ;
294 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
295
296 Int_t iDigit;
297 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
298 digit = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigit]) ) ;
299 Int_t relid[4] ;
300 Float_t xi ;
301 Float_t zi ;
302 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
303 phosgeom->RelPosInModule(relid, xi, zi);
304 Float_t w = TMath::Max(0.,fW0+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
305 d += w*((xi-x)*(xi-x) + (zi-z)*(zi-z) ) ;
306 wtot+=w ;
307 }
308
309 d /= wtot ;
310
311 return TMath::Sqrt(d) ;
312}
313//______________________________________________________________________________
314Float_t AliPHOSEmcRecPoint::CoreEnergy()
315{
316 //This function calculates energy in the core,
317 //i.e. within radius rad = 3cm. Beyond this radius
318 //in accoradnce with shower profile energy deposition
319 // should be less than 2%
320
321 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
322
323 Float_t eCore = 0 ;
324 Float_t coreRadius = 3 ;
325
326 TVector3 locpos;
327 GetLocalPosition(locpos);
328 Float_t x = locpos.X() ;
329 Float_t z = locpos.Z() ;
330
331 AliPHOSDigit * digit ;
332 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
333
334 Int_t iDigit;
335 for(iDigit=0; iDigit < fMulDigit; iDigit++) {
336 digit = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigit]) ) ;
337 Int_t relid[4] ;
338 Float_t xi ;
339 Float_t zi ;
340 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
341 phosgeom->RelPosInModule(relid, xi, zi);
342 Float_t distance = TMath::Sqrt((xi-x)*(xi-x)+(zi-z)*(zi-z)) ;
343 if(distance < coreRadius)
344 eCore += fEnergyList[iDigit] ;
345 }
346
347return eCore ;
348}
349
350//____________________________________________________________________________
351void AliPHOSEmcRecPoint::GetElipsAxis(Float_t * lambda)
352{
353 // Calculates the axis of the shower ellipsoid
354
355 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
356
357 Double_t wtot = 0. ;
358 Double_t x = 0.;
359 Double_t z = 0.;
360 Double_t dxx = 0.;
361 Double_t dzz = 0.;
362 Double_t dxz = 0.;
363
364 AliPHOSDigit * digit ;
365 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
366 Int_t iDigit;
367
368 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
369 digit = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigit]) ) ;
370 Int_t relid[4] ;
371 Float_t xi ;
372 Float_t zi ;
373 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
374 phosgeom->RelPosInModule(relid, xi, zi);
375 Double_t w = TMath::Max(0.,fW0+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
376 dxx += w * xi * xi ;
377 x += w * xi ;
378 dzz += w * zi * zi ;
379 z += w * zi ;
380 dxz += w * xi * zi ;
381 wtot += w ;
382 }
383 dxx /= wtot ;
384 x /= wtot ;
385 dxx -= x * x ;
386 dzz /= wtot ;
387 z /= wtot ;
388 dzz -= z * z ;
389 dxz /= wtot ;
390 dxz -= x * z ;
391
392// //Apply correction due to non-perpendicular incidence
393// Double_t CosX ;
394// Double_t CosZ ;
395// Double_t DistanceToIP= (Double_t ) ((AliPHOSGeometry *) fGeom)->GetIPtoCrystalSurface() ;
396
397// CosX = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+x*x) ;
398// CosZ = DistanceToIP/TMath::Sqrt(DistanceToIP*DistanceToIP+z*z) ;
399
400// dxx = dxx/(CosX*CosX) ;
401// dzz = dzz/(CosZ*CosZ) ;
402// dxz = dxz/(CosX*CosZ) ;
403
404
405 lambda[0] = 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
406 if(lambda[0] > 0)
407 lambda[0] = TMath::Sqrt(lambda[0]) ;
408
409 lambda[1] = 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ;
410 if(lambda[1] > 0) //To avoid exception if numerical errors lead to negative lambda.
411 lambda[1] = TMath::Sqrt(lambda[1]) ;
412 else
413 lambda[1]= 0. ;
414}
415
416//____________________________________________________________________________
417void AliPHOSEmcRecPoint::GetLocalPosition(TVector3 &LPos)
418{
419 // Calculates the center of gravity in the local PHOS-module coordinates
420
421 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
422
423 if( fLocPos.X() < 1000000.) { // already evaluated
424 LPos = fLocPos ;
425 return ;
426 }
427
428 Float_t wtot = 0. ;
429
430 Int_t relid[4] ;
431
432 Float_t x = 0. ;
433 Float_t z = 0. ;
434
435 AliPHOSDigit * digit ;
436
437 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
438
439 Int_t iDigit;
440
441
442 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
443 digit = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigit]) );
444
445 Float_t xi ;
446 Float_t zi ;
447 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
448 phosgeom->RelPosInModule(relid, xi, zi);
449 Float_t w = TMath::Max( 0., fW0 + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
450 x += xi * w ;
451 z += zi * w ;
452 wtot += w ;
453
454 }
455
456 x /= wtot ;
457 z /= wtot ;
458 fLocPos.SetX(x) ;
459 fLocPos.SetY(0.) ;
460 fLocPos.SetZ(z) ;
461
462 LPos = fLocPos ;
463}
464
465//____________________________________________________________________________
466Float_t AliPHOSEmcRecPoint::GetMaximalEnergy(void)
467{
468 // Finds the maximum energy in the cluster
469
470 Float_t menergy = 0. ;
471
472 Int_t iDigit;
473
474 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
475
476 if(fEnergyList[iDigit] > menergy)
477 menergy = fEnergyList[iDigit] ;
478 }
479 return menergy ;
480}
481
482//____________________________________________________________________________
483Int_t AliPHOSEmcRecPoint::GetMultiplicityAtLevel(const Float_t H)
484{
485 // Calculates the multiplicity of digits with energy larger than H*energy
486
487 Int_t multipl = 0 ;
488 Int_t iDigit ;
489 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
490
491 if(fEnergyList[iDigit] > H * fAmp)
492 multipl++ ;
493 }
494 return multipl ;
495}
496
497//____________________________________________________________________________
498Int_t AliPHOSEmcRecPoint::GetNumberOfLocalMax(Int_t * maxAt, Float_t * maxAtEnergy)
499{
500 // Calculates the number of local maxima in the cluster using fLocalMaxCut as the minimum
501 // energy difference between two local maxima
502
503 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
504
505 AliPHOSDigit * digit ;
506 AliPHOSDigit * digitN ;
507
508
509 Int_t iDigitN ;
510 Int_t iDigit ;
511
512 for(iDigit = 0; iDigit < fMulDigit; iDigit++){
513 maxAt[iDigit] = (Int_t) ( please->GimeDigit(fDigitsList[iDigit]) ) ;
514 }
515
516 for(iDigit = 0 ; iDigit < fMulDigit; iDigit++) {
517 if(maxAt[iDigit] != -1) {
518 digit = (AliPHOSDigit *) maxAt[iDigit] ;
519
520 for(iDigitN = 0; iDigitN < fMulDigit; iDigitN++) {
521 digitN = (AliPHOSDigit *) ( please->GimeDigit(fDigitsList[iDigitN]) ) ;
522
523 if ( AreNeighbours(digit, digitN) ) {
524 if (fEnergyList[iDigit] > fEnergyList[iDigitN] ) {
525 maxAt[iDigitN] = -1 ;
526 // but may be digit too is not local max ?
527 if(fEnergyList[iDigit] < fEnergyList[iDigitN] + fLocMaxCut)
528 maxAt[iDigit] = -1 ;
529 }
530 else {
531 maxAt[iDigit] = -1 ;
532 // but may be digitN too is not local max ?
533 if(fEnergyList[iDigit] > fEnergyList[iDigitN] - fLocMaxCut)
534 maxAt[iDigitN] = -1 ;
535 }
536 } // if Areneighbours
537 } // while digitN
538 } // slot not empty
539 } // while digit
540
541 iDigitN = 0 ;
542 for(iDigit = 0; iDigit < fMulDigit; iDigit++) {
543 if(maxAt[iDigit] != -1){
544 maxAt[iDigitN] = maxAt[iDigit] ;
545 maxAtEnergy[iDigitN] = fEnergyList[iDigit] ;
546 iDigitN++ ;
547 }
548 }
549 return iDigitN ;
550}
551
552
553// //____________________________________________________________________________
554// AliPHOSEmcRecPoint& AliPHOSEmcRecPoint::operator = (AliPHOSEmcRecPoint Clu)
555// {
556// int * dl = Clu.GetDigitsList() ;
557
558// if(fDigitsList)
559// delete fDigitsList ;
560
561// AliPHOSDigit * digit ;
562
563// Int_t iDigit;
564
565// for(iDigit=0; iDigit<fMulDigit; iDigit++) {
566// digit = (AliPHOSDigit *) dl[iDigit];
567// AddDigit(*digit) ;
568// }
569
570// fAmp = Clu.GetTotalEnergy() ;
571// fGeom = Clu.GetGeom() ;
572// TVector3 locpos;
573// Clu.GetLocalPosition(locpos) ;
574// fLocPos = locpos;
575// fMulDigit = Clu.GetMultiplicity() ;
576// fMaxDigit = Clu.GetMaximumMultiplicity() ;
577// fPHOSMod = Clu.GetPHOSMod() ;
578// fW0 = Clu.GetLogWeightCut() ;
579// fDelta = Clu.GetDelta() ;
580// fLocMaxCut = Clu.GetLocMaxCut() ;
581
582// delete dl ;
583
584// return *this ;
585// }
586
587//____________________________________________________________________________
588void AliPHOSEmcRecPoint::Print(Option_t * option)
589{
590 // Print the list of digits belonging to the cluster
591
592 cout << "AliPHOSEmcRecPoint: " << endl ;
593
594 AliPHOSDigit * digit ;
595 Int_t iDigit;
596 AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
597
598 Float_t xi ;
599 Float_t zi ;
600 Int_t relid[4] ;
601
602 AliPHOSIndexToObject * please = AliPHOSIndexToObject::GetInstance() ;
603
604 for(iDigit=0; iDigit<fMulDigit; iDigit++) {
605 digit = please->GimeDigit( fDigitsList[iDigit] ) ;
606 phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
607 phosgeom->RelPosInModule(relid, xi, zi);
608 cout << " Id = " << digit->GetId() ;
609 cout << " module = " << relid[0] ;
610 cout << " x = " << xi ;
611 cout << " z = " << zi ;
612 cout << " Energy = " << fEnergyList[iDigit] << endl ;
613 }
614 cout << " Multiplicity = " << fMulDigit << endl ;
615 cout << " Cluster Energy = " << fAmp << endl ;
616 cout << " Stored at position " << GetIndexInList() << endl ;
617
618}
619//______________________________________________________________________________
620// void AliPHOSEmcRecPoint::Streamer(TBuffer &R__b)
621// {
622// // Stream an object of class AliPHOSEmcRecPoint.
623
624// if (R__b.IsReading()) {
625// Version_t R__v = R__b.ReadVersion(); if (R__v) { }
626// AliPHOSRecPoint::Streamer(R__b);
627// R__b >> fDelta;
628// fEnergyList = new Float_t[fMulDigit] ;
629// R__b.ReadFastArray(fEnergyList, fMulDigit);
630// R__b >> fLocMaxCut;
631// R__b >> fW0;
632// } else {
633// R__b.WriteVersion(AliPHOSEmcRecPoint::IsA());
634// AliPHOSRecPoint::Streamer(R__b);
635// R__b << fDelta;
636// R__b.WriteFastArray(fEnergyList, fMulDigit);
637// R__b << fLocMaxCut;
638// R__b << fW0;
639// }
640// }
641