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[u/mrichter/AliRoot.git] / EMCAL / AliEMCALJetFinderAlgoOmni.cxx
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f7d5860b 1
2//THIS Also includes summing ALL cells in the jetcone towards the jet energy NOT just those above threshold!!!!!
3
4
5/**************************************************************************
6 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
7 * *
8 * Author: The ALICE Off-line Project. *
9 * Contributors are mentioned in the code where appropriate. *
10 * *
11 * Permission to use, copy, modify and distribute this software and its *
12 * documentation strictly for non-commercial purposes is hereby granted *
13 * without fee, provided that the above copyright notice appears in all *
14 * copies and that both the copyright notice and this permission notice *
15 * appear in the supporting documentation. The authors make no claims *
16 * about the suitability of this software for any purpose. It is *
17 * provided "as is" without express or implied warranty. *
18 **************************************************************************/
19
ee6b678f 20/* $Id$ */
f7d5860b 21
22//*--Author: Sarah Blyth (LBL)
23//*--Based on UA1 jet algorithm from LUND JETSET called from EMC-erj
24
25#include "TTask.h"
26#include "AliEMCALJetFinderInput.h"
27#include "AliEMCALJetFinderOutput.h"
28#include "AliEMCALJetFinderAlgo.h"
29#include "AliEMCALJetFinderAlgoOmni.h"
30#include "AliEMCALJetFinderAlgoUA1Unit.h"
31#include "AliEMCALGeometry.h"
32#include "AliEMCAL.h"
33#include "AliEMCALGetter.h"
34#include "AliEMCALDigit.h"
35#include "TParticle.h"
36#include "AliRun.h"
37#include "AliEMCALJet.h"
38#include "TMath.h"
39
40
41ClassImp(AliEMCALJetFinderAlgoOmni)
42
43 AliEMCALJetFinderAlgoOmni::AliEMCALJetFinderAlgoOmni()
44{
45 //Default constructor
46if (fDebug>0) Info("AliEMCALJetFinderAlgoOmni","Beginning Default Constructor");
47
48 fNumIter = 0;
49 fNumUnits = 13824; //Number of towers in EMCAL
50 fESeed = 5.0; //Default value
51 fConeRad = 0.3; //Default value
52 fJetEMin = 10.0; //Default value
53 fEtMin = 0.28; //Default value
54 fMinMove = 0.05; //From original UA1 JetFinder
55 fMaxMove = 0.15; //From original UA1 JetFinder
56 fBGMaxMove = 0.035; //From original UA1 JetFinder
57 fPtCut = 0;
58 fHadCorr = 0;
59 fEBGTotal = 1.0; //Set to 1 so that no div by zero in first FindJets() loop
60 fEBGTotalOld = 0.0;
61 fEBGAve = 0.0;
62 fEnergy = 0.0;
63 fJetEta = 0.0;
64 fJetPhi = 0.0;
65 fEtaInit = 0.0;
66 fPhiInit = 0.0;
67 fEtaB = 0.0;
68 fPhiB = 0.0;
69 fJetESum = 0.0;
70 fJetEtaSum = 0.0;
71 fJetPhiSum = 0.0;
72 fDEta = 0.0;
73 fDPhi = 0.0;
74 fDistP = 0.0;
75 fDistI = 0.0;
76 fTempE = 0.0;
77 fRad = 2.0; //Set to 2 to start
78 fNumInCone = 0;
79 fNumJets = 0;
80 fArrayInitialised = 0; //Set to FALSE to start
81 fBGType = kRatio; //Set Ratio method as default BG subtraction method
82 fBGPar = -1.0; //Set to 1 to start
83}
84
85 AliEMCALJetFinderAlgoOmni::~AliEMCALJetFinderAlgoOmni()
86 {
87 //Destructor
88 if (fDebug>0) Info("AliEMCALJetFinderAlgoOmni","Beginning Destructor");
89 delete[] fUnit;
90 delete[] fUnitNoCuts;
91 }
92
93 void AliEMCALJetFinderAlgoOmni::SetJetFindingParameters
94 (Int_t numUnits, Float_t eSeed, Float_t coneRad, Float_t jetEMin, Float_t etMin,
95 Float_t minMove, Float_t maxMove, Float_t bgMaxMove)
96 {
97 //Sets parameters for the JetFinding algorithm
98 if (fDebug>1) Info("SetJetFindingParameters","Setting parameters for JetFinding");
99
100 SetNumUnits(numUnits);
101 SetJetESeed(eSeed);
102 SetConeRad(coneRad);
103 SetJetEMin(jetEMin);
104 SetEtMin(etMin);
105 SetMinMove(minMove);
106 SetMaxMove(maxMove);
107 SetBGMaxMove(bgMaxMove);
108 }
109
110 void AliEMCALJetFinderAlgoOmni::SetJetFindingParameters
111 (Int_t numUnits, Float_t eSeed, Float_t coneRad, Float_t jetEMin, Float_t etMin)
112 {
113 //Sets fewer parameters for the JetFinding algorithm
114 if (fDebug>1) Info("SetJetFindingParameters","Setting parameters for JetFinding");
115
116 SetNumUnits(numUnits);
117 SetJetESeed(eSeed);
118 SetConeRad(coneRad);
119 SetJetEMin(jetEMin);
120 SetEtMin(etMin);
121 SetMinMove(fMinMove);
122 SetMaxMove(fMaxMove);
123 SetBGMaxMove(fBGMaxMove);
124 }
125
126 void AliEMCALJetFinderAlgoOmni::InitUnitArray()
127 {
128 //Initialises unit arrays
129 if(fArrayInitialised) delete[] fUnit;
130 fUnit = new AliEMCALJetFinderAlgoUA1Unit[fNumUnits];
131 fUnitNoCuts = new AliEMCALJetFinderAlgoUA1Unit[fNumUnits];
132 fArrayInitialised = 1;
133 }
134
135 void AliEMCALJetFinderAlgoOmni::FillUnitArray(AliEMCALJetFinderAlgoUA1FillUnitFlagType_t flag)
136 {
137 if (fDebug>1) Info("FillUnitArray","Beginning FillUnitArray");
138 // AliEMCAL* pEMCAL = (AliEMCAL*) gAlice->GetModule("EMCAL");
139
140 // if (pEMCAL){
141 // AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance(pEMCAL->GetTitle(), "");
142 // }else
143 // {
144 //AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance("EMCAL_5655_21", "");
145 AliEMCALGeometry* geom = AliEMCALGetter::Instance()->EMCALGeometry() ;
146 // }
147
148 AliEMCALJetFinderAlgoUA1FillUnitFlagType_t option = flag;
149 Int_t numTracks, numDigits;
150
151 //Loops over all elements in the AliEMCALJetFinderAlgoUA1Unit array and
152 //fills the objects with relevant values from the Data Input object
153 if (fDebug>10) Info("FillUnitArray","Filling array with Unit objects");
154 if (fDebug>15) Info("FillUnitArray","NTracks %i NDigits %i",fInputPointer->GetNTracks(),fInputPointer->GetNDigits());
155 numTracks = fInputPointer->GetNTracks();
156 numDigits = fInputPointer->GetNDigits();
157 TParticle *myPart;
158 AliEMCALDigit *myDigit;
159
160 //Fill units with Track info if appropriate
161 if(option==kFillTracksOnly || option ==kFillAll)
162 {
163 for(Int_t j=0; j<numTracks; j++)
164 {
165 myPart = fInputPointer->GetTrack(j);
166 Float_t eta = myPart->Eta();
167 Float_t phi = myPart->Phi();
168 Int_t towerID = geom->TowerIndexFromEtaPhi(eta,180.0/TMath::Pi()*phi);
169 Float_t pT = myPart->Pt();
170 Float_t unitEnergy = fUnit[towerID-1].GetUnitEnergy();
171 Float_t unitEnergyNoCuts = fUnitNoCuts[towerID-1].GetUnitEnergy();
172
173 /*
174 //OLD WAY: //Do Hadron Correction
175 if(fHadCorr != 0)
176 {
177 Double_t fullP = myPart->P();
178 Double_t hCEnergy = fHadCorr->GetEnergy(fullP, (Double_t)eta);
179 unitEnergy -= hCEnergy*TMath::Sin(myPart->Theta());
180 fUnit[towerID-1].SetUnitEnergy(unitEnergy);
181 } //end Hadron Correction loop
182 */
183
184 //Do Hadron Correction with propagate phi for the track
185 if(fHadCorr != 0)
186 {
187 Bool_t curl = 1;
188 Float_t deltaPhi;
189 TParticlePDG *pdg = myPart->GetPDG();
190 if(pdg->Charge() < 0)
191 {
192 deltaPhi = PropagatePhi(myPart->Pt(), -1.0, curl);
193 }
194 else{
195 deltaPhi = PropagatePhi(myPart->Pt(), 1.0, curl);
196 }
197 phi += deltaPhi;
198 //Get new tower id for cell that track would curve into
199 Int_t towerID2;
200 if(phi<(1.0/3.0)*TMath::Pi() || phi>TMath::Pi())
201 {
202 towerID2 = -1;
203 }
204 else{
205 towerID2 = geom->TowerIndexFromEtaPhi(eta,180.0/TMath::Pi()*phi);
206 }
207
208 if(towerID2 != -1)
209 {
210 //Find unit energy of new tower
211 Float_t unitEnergy2 = fUnit[towerID2-1].GetUnitEnergy();
212 Float_t unitEnergy2NoCuts = fUnitNoCuts[towerID2-1].GetUnitEnergy();
213 Double_t fullP = myPart->P();
214 Double_t hCEnergy = fHadCorr->GetEnergy(fullP, (Double_t)eta);
215 unitEnergy2 -= hCEnergy*TMath::Sin(myPart->Theta());
216 unitEnergy2NoCuts -= hCEnergy*TMath::Sin(myPart->Theta());
217 fUnit[towerID2-1].SetUnitEnergy(unitEnergy2);
218 fUnitNoCuts[towerID2-1].SetUnitEnergy(unitEnergy2NoCuts);
219 }//end if for towerID2
220 }//end Hadron Correction loop
221
222 fUnitNoCuts[towerID-1].SetUnitEnergy(unitEnergyNoCuts + pT);
223 //Do Pt cut on tracks
224 if(fPtCut != 0 && pT < fPtCut) continue;
225
226 fUnit[towerID-1].SetUnitEnergy(unitEnergy+pT);
227
228 }//end tracks loop
229 }//end Tracks condition
230
231
232 //Fill units with Digit info if appropriate
233 if(option ==kFillDigitsOnly || option ==kFillAll)
234 {
235 for(Int_t k=0; k<numDigits; k++)
236 {
237 myDigit = fInputPointer->GetDigit(k);
238 if (fDebug>10) Info("FillUnitArray","getting digits %i %i numdigits",k,numDigits );
239 Int_t towerID = myDigit->GetId();
240 Int_t amplitude = myDigit->GetAmp(); //Gets the integer valued amplitude of the digit
241 Float_t amp = (Float_t)amplitude; //Need to typecast to Float_t before doing real energy conversion
242 Float_t digitEnergy = amp/10000000.0; //Factor of 10 million needed to convert!
243 Float_t unitEnergy = fUnit[towerID-1].GetUnitEnergy() + digitEnergy;
244 Float_t unitEnergyNoCuts = fUnitNoCuts[towerID-1].GetUnitEnergy() + digitEnergy;
245 fUnit[towerID-1].SetUnitEnergy(unitEnergy);
246 fUnitNoCuts[towerID-1].SetUnitEnergy(unitEnergyNoCuts);
247 }//end digits loop
248 }//end digits condition
249
250 //Set all unit flags, Eta, Phi
251 for(Int_t i=0; i<fNumUnits; i++)
252 {
253 if (fDebug>10) Info("FillUnitArray","Setting all units outside jets");
254 fUnit[i].SetUnitFlag(kOutJet); //Set all units to be outside a jet initially
255 fUnit[i].SetUnitID(i+1);
256 Float_t eta;
257 Float_t phi;
258 geom->EtaPhiFromIndex(fUnit[i].GetUnitID(), eta, phi);
259 fUnit[i].SetUnitEta(eta);
260 fUnit[i].SetUnitPhi(phi*TMath::Pi()/180.0);
261
262 fUnitNoCuts[i].SetUnitFlag(kOutJet); //Set all units to be outside a jet initially
263 fUnitNoCuts[i].SetUnitID(i+1);
264 eta = 0.0;
265 phi = 0.0;
266 geom->EtaPhiFromIndex(fUnitNoCuts[i].GetUnitID(), eta, phi);
267 fUnitNoCuts[i].SetUnitEta(eta);
268 fUnitNoCuts[i].SetUnitPhi(phi*TMath::Pi()/180.0);
269 // if(i>13000) cout<<"!!!!!!!!!!!!!!!!!For unit0, eta="<<eta<<" and phi="<<phi*TMath::Pi()/180.0<<" and ID="<<fUnit[i].GetUnitID()<<endl;
270 // if(fUnit[i].GetUnitEnergy()>0) cout<<"Unit ID "<<fUnit[i].GetUnitID() <<"with eta="<<eta<<" and phi="<<phi*TMath::Pi()/180.0<<" has energy="<<fUnit[i].GetUnitEnergy()<<endl;
271 }//end loop over all units in array (same as all towers in EMCAL)
272 }
273
274
275 void AliEMCALJetFinderAlgoOmni::Sort(AliEMCALJetFinderAlgoUA1Unit *unit, Int_t length)
276 {
277 //Calls the recursive quicksort method to sort unit objects in decending order of Energy
278 if (fDebug>1) Info("Sort","Sorting Unit objects");
279 QS(unit, 0, length-1);
280 }
281
282
283 void AliEMCALJetFinderAlgoOmni::QS(AliEMCALJetFinderAlgoUA1Unit *unit, Int_t left, Int_t right)
284 {
285 //Sorts the AliEMCALJetFinderAlgoUA1Unit objects in decending order of Energy
286 if (fDebug>111) Info("QS","QuickSorting Unit objects");
287
288 Int_t i;
289 Int_t j;
290 AliEMCALJetFinderAlgoUA1Unit unitFirst;
291 AliEMCALJetFinderAlgoUA1Unit unitSecond;
292
293 i = left;
294 j = right;
295 unitFirst = unit[(left+right)/2];
296
297 do
298 {
299 while( (unit[i].GetUnitEnergy() > unitFirst.GetUnitEnergy()) && (i < right)) i++;
300 while( (unitFirst.GetUnitEnergy() > unit[j].GetUnitEnergy()) && (j > left)) j--;
301
302 if(i <= j)
303 {
304 unitSecond = unit[i];
305 unit[i] = unit[j];
306 unit[j] = unitSecond;
307 i++;
308 j--;
309 }//end if
310 }while(i <= j);
311
312 if(left < j) QS(unit, left, j);
313 if(i < right) QS(unit, i, right);
314 }
315
316
317 void AliEMCALJetFinderAlgoOmni::FindBG()
318 {
319 if(fBGType == kRatio) RatioBG();
320 else if(fBGType == kCone) ConeBG();
321 else if(fBGType == kConstant) ConstantBG();
322 }
323
324 void AliEMCALJetFinderAlgoOmni::RatioBG()
325 {
326 //Finds the background energy for the iteration
327 //using the Ratio method
328 if (fDebug>1) Info("FindBG","Finding Average Background");
329 //Store BGEperCell from previous iteration!
330 fEBGTotalOld = fEBGTotal;
331 fEBGTotal = 0.0;
332 Int_t numCone = 0;
333
334 //If user has not set fBGPar, set it to the default
335 //for TPC = 90% efficiency, PtCut = 2GeV/c, timecut = 30ns
336 if(fBGPar == -1) fBGPar = 0.4685;
337
338 //Loop over all unit objects in the Unit array and link to same
339 //unit ID in NoCuts Unit array
340 for(Int_t i=0; i<fNumUnits; i++)
341 {
342 if(fUnit[i].GetUnitFlag() != kInJet)
343 {
344 Int_t id = fUnit[i].GetUnitID();
345 fEBGTotal += fUnitNoCuts[id-1].GetUnitEnergy();
346 }
347 else numCone++;
348 }//end for
349
350 fEBGTotal *= fBGPar;
351 fEBGAve = fEBGTotal / (fNumUnits - numCone);
352 if (fDebug>5) Info("FindBG","Average BG is %f: ",fEBGAve);
353
354 for(Int_t count=0; count<fNumUnits;count++)
355 {
356 fUnit[count].SetUnitFlag(kOutJet);
357 }//end for
358 }
359
360 void AliEMCALJetFinderAlgoOmni::ConeBG()
361 {
362 //Finds the background energy for the iteration
363 //using all energy not contained inside a jet
364 if (fDebug>1) Info("FindBG","Finding Average Background");
365 //Store old value of BGEperCell!
366 fEBGTotalOld = fEBGTotal;
367 fEBGTotal = 0.0;
368 Int_t numCone = 0;
369
370 //Loop over all unit objects in the array and sum the energy of those not in a jet
371 for(Int_t i=0; i<fNumUnits; i++)
372 {
373 if(fUnit[i].GetUnitFlag() != kInJet)
374 fEBGTotal += fUnit[i].GetUnitEnergy();
375 else numCone++;
376 }//end for
377
378 fEBGAve = fEBGTotal / (fNumUnits - numCone);
379 if (fDebug>5) Info("FindBG","Average BG is %f: ",fEBGAve);
380
381 for(Int_t count=0; count<fNumUnits;count++)
382 {
383 fUnit[count].SetUnitFlag(kOutJet);
384 }//end for
385 }
386
387 void AliEMCALJetFinderAlgoOmni::ConstantBG()
388 {
389 //Finds the background energy for the iteration
390 //using all energy not contained inside a jet
391 if (fDebug>1) Info("FindBG","Finding Average Background");
392
393 //If user has not set fBGPar, set it to the default
394 //for TPC = 90% efficiency, PtCut = 2GeV/c, timecut = 30ns
395 if(fBGPar == -1) fBGPar = 0.03378;
396
397 fEBGAve = fBGPar;
398 if (fDebug>5) Info("FindBG","Average BG is %f: ",fEBGAve);
399
400 fEBGTotal = 0.0;
401 Int_t numCone = 0;
402 for(Int_t count=0; count<fNumUnits;count++)
403 {
404 if(fUnit[count].GetUnitFlag() == kInJet)
405 {
406 numCone++;
407 }
408 fUnit[count].SetUnitFlag(kOutJet);
409 }//end for
410 fEBGTotal = fEBGAve * (fNumUnits-numCone);
411 fEBGTotalOld = fEBGTotal;
412 }
413
414 void AliEMCALJetFinderAlgoOmni::FindJetEtaPhi(Int_t counter)
415 {
416 //Finds the eta and phi of the jet axis
417 if (fDebug>10) Info("FindJetEtaPhi","Finding Jet Eta and Phi");
418
419 fDEta = fUnit[counter].GetUnitEta() - fEtaInit;
420 fDPhi = fUnit[counter].GetUnitPhi() - fPhiInit;
421
422 fEnergy = fUnit[counter].GetUnitEnergy() - fEBGAve;
423 fJetEtaSum += fEnergy * fDEta;
424 fJetPhiSum += fEnergy * fDPhi;
425 fJetESum += fEnergy;
426 fJetEta = fEtaInit + (fJetEtaSum / fJetESum);
427 fJetPhi = fPhiInit + (fJetPhiSum / fJetESum);
428 }
429
430
431 void AliEMCALJetFinderAlgoOmni::FindJetEnergy()
432 {
433 //Finds the energy of the jet after the final axis has been found
434 if (fDebug>1) Info("FindJetEnergy","Finding Jet Energy");
435
436 for(Int_t i=0; i<fNumUnits; i++)
437 {
438 //Loop over all unit objects in the array and find if within cone radius
439 Float_t dEta = fUnit[i].GetUnitEta() - fJetEta;
440 Float_t dPhi = fUnit[i].GetUnitPhi() - fJetPhi;
441 Float_t rad = TMath::Sqrt( (dEta*dEta) + (dPhi*dPhi) );
442
443 if(fUnit[i].GetUnitFlag()==kOutJet && rad<= fConeRad)
444 {
445 fUnit[i].SetUnitFlag(kInCurrentJet);
446 Float_t energy = fUnit[i].GetUnitEnergy() - fEBGAve;
447 fJetESum += energy;
448 fJetEtaSum += energy * dEta;
449 fJetPhiSum += energy * dPhi;
450 fNumInCone++; //Increment the number of cells in the jet cone
451 }//end if
452 }//end for
453 }
454
455
456 void AliEMCALJetFinderAlgoOmni::StoreJetInfo()
457 {
458 //Stores the resulting jet information in appropriate storage structure (TO BE DECIDED!!!!)
459 if (fDebug>1) Info("StoreJetInfo","Storing Jet Information");
460
461 //Store:
462 //fJetESum is the final jet energy (background has been subtracted)
463 //fJetEta is the final jet Eta
464 //fJetPhi is the final jet Phi
465 //fNumInCone is the final number of cells included in the jet cone
466 //fEtaInit is the eta of the initiator cell
467 //fPhiInit is the phi of the initiator cell
468 fJet.SetEnergy(fJetESum);
469 fJet.SetEta(fJetEta);
470 fJet.SetPhi(fJetPhi);
471
472 cout<<"For iteration "<<fNumIter <<" and Jet number " <<fNumJets <<endl;
473 cout<<"The jet energy is: " <<fJetESum <<endl;
474 cout<<"The jet eta is ---->" <<fJetEta <<endl;
475 cout<<"The jet phi is ---->" <<fJetPhi <<endl;
476
477 Int_t numberTracks = fInputPointer->GetNTracks();
478 TParticle *myP;
479 Int_t numTracksInCone = 0;
480
481 for(Int_t counter=0; counter<numberTracks; counter++)
482 {
483 myP = fInputPointer->GetTrack(counter);
484 Float_t eta = myP->Eta();
485 Float_t phi = myP->Phi();
486 Float_t deta = fJetEta-eta;
487 Float_t dphi = fJetPhi -phi;
488 Float_t rad = TMath::Sqrt( (deta*deta) + (dphi*dphi));
489 if(rad<=fConeRad) numTracksInCone++;
490 }//end for
491
492 Float_t *pTArray = new Float_t[numTracksInCone];
493 Float_t *etaArray = new Float_t[numTracksInCone];
494 Float_t *phiArray = new Float_t[numTracksInCone];
495 Int_t *pdgArray = new Int_t[numTracksInCone];
496 Int_t index = 0;
497
498 for(Int_t counter2=0; counter2<numberTracks; counter2++)
499 {
500 myP = fInputPointer->GetTrack(counter2);
501 Float_t eta = myP->Eta();
502 Float_t phi = myP->Phi();
503 Float_t deta = fJetEta-eta;
504 Float_t dphi = fJetPhi -phi;
505 Float_t rad = TMath::Sqrt( (deta*deta) + (dphi*dphi));
506 if(rad<=fConeRad)
507 {
508 pTArray[index] = myP->Pt();
509 etaArray[index] = eta;
510 phiArray[index] = phi;
511 pdgArray[index] = myP->GetPdgCode();
512 index++;
513 }//end if
514 }//end for
515
516 fJet.SetTrackList(numTracksInCone,pTArray, etaArray, phiArray, pdgArray);
517 fOutputObject.AddJet(&fJet);
518 delete[] pTArray;
519 delete[] etaArray;
520 delete[] phiArray;
521 delete[] pdgArray;
522 }
523
524
525 void AliEMCALJetFinderAlgoOmni::FindJets()
526 {
527 //Runs the complete UA1 JetFinding algorithm to find jets!
528 if (fDebug>1) Info("FindJets","Starting Jet Finding!!!");
529
530 //If the array of JetFinderUnit objects has not been initialised then initialise with default settings
531 if(!fArrayInitialised)
532 {
533 InitUnitArray();
534 FillUnitArray(kFillAll);
535 }//end if
536 if (fDebug>1) Info("FindJets","Unit array filled");
537
538 //Step 1. Sort the array in descending order of Energy
539 Sort(fUnit,fNumUnits);
540
541 //Step 2. Set the number of iterations and Number of jets found to zero to start
542 fNumIter = 0;
543 fNumJets = 0;
544
545 //Step 3. Begin the iteration loop to find jets
546 //Need to iterate the algorithm while number of iterations<2 OR number of iterations<10 AND
547 //the value of the average background has changed more than specified amount
548 //Min iterations = 2, Max iterations = 10
549 //while(fNumIter<2 || (fNumIter <10 && ( (fEBGTotal-fEBGTotalOld)/fEBGTotal) > fBGMaxMove) )
550
551 while(fNumIter<2 || (fNumIter <10 && ( fEBGTotal-fEBGTotalOld) > fEBGTotal*fBGMaxMove) )
552 {
553 if (fDebug>1) Info("FindJets","Starting BIG iteration ---> %i",fNumIter);
554
555 //Step 4. Find the value of the average background energy
556 FindBG();
557 fOutputObject.Reset(kResetJets); //Reset output object to store info for new iteration
558 fNumJets=0;
559
560 //Loop over the array of unit objects and flag those with energy below MinCellEt
561 Int_t numbelow = 0;
562 for(Int_t j=0; j<fNumUnits; j++)
563 {
564 if( (fUnit[j].GetUnitEnergy()-fEBGAve) < fEtMin)
565 {
566 // fUnit[j].SetUnitFlag(kBelowMinEt); TAKING OUT kBelow flag
567 numbelow++;
568 }//end if
569 }//end for
570 //cout<<"THERE WERE "<<numbelow<<" units with E <EtMin!!!!!!!!!!!!!!!"<<endl;
571
572 //Do quick check if there are no jets upfront
573 // if(fUnit[0].GetUnitFlag() == kBelowMinEt)
574 if( (fUnit[0].GetUnitEnergy()-fEBGAve) < fEtMin)
575 {
576 cout <<"There are no jets for this event!" <<endl;
577 break;
578 }//end if
579
580 //Step 5. Begin with the first jet candidate cell (JET SEED LOOP)
581 if (fDebug>5) Info("FindJets","Beginning JET SEED LOOP");
582 for(Int_t count=0; count<fNumUnits; count++)
583 {
584
585//CHECK CONDITION HERE _ NOT SURE IF SHOULD MAYBE BE: GetUnitEnergy()-fEBGAve >fESeed?????????????????????????????
586 if(fUnit[count].GetUnitEnergy()>=fESeed && fUnit[count].GetUnitFlag()==kOutJet)
587 {
588 fEnergy = fUnit[count].GetUnitEnergy() - fEBGAve;
589 fJetEta = fUnit[count].GetUnitEta();
590 fJetPhi = fUnit[count].GetUnitPhi();
591 Int_t seedID = fUnit[count].GetUnitID();
592 if (fDebug>5) Info("FindJets","Inside first candidate jet seed loop for time : %i", count);
593 if (fDebug>5) Info("FindJets","Found candidate energy %f ",fEnergy);
594 if (fDebug>5) Info("FindJets","Found candidate eta %f ", fJetEta);
595 if (fDebug>5) Info("FindJets","Found candidate phi %f ", fJetPhi);
596 if (fDebug>5) Info("FindJets","Found candidate ID %i", seedID);
597
598 fEtaInit = fJetEta;
599 fPhiInit = fJetPhi;
600 fEtaB = fJetEta;
601 fPhiB = fJetPhi;
602 fJetESum = 0.0;
603 fJetEtaSum = 0.0;
604 fJetPhiSum = 0.0;
605
606 //Step 6. Find Jet Eta and Phi
607 //Loop over all units in the array to find the ones in the jet cone and determine contrib to Jet eta, phi
608 do
609 {
610 for(Int_t count1=0; count1<fNumUnits; count1++)
611 {
612 if(fUnit[count1].GetUnitID() == seedID) continue; //skip unit if the jetseed to avoid doublecounting
613 if(fUnit[count1].GetUnitFlag() == kOutJet)
614 {
615 fDEta = fUnit[count1].GetUnitEta() - fJetEta;
616 fDPhi = fUnit[count1].GetUnitPhi() - fJetPhi;
617 fRad = TMath::Sqrt( (fDEta*fDEta) + (fDPhi*fDPhi) );
618 if(fRad <= fConeRad)
619 {
620 FindJetEtaPhi(count1);
621 }//end if
622 }//end if
623 }//end for (Jet Eta, Phi LOOP)
624
625 //Find the distance cone centre moved from previous cone centre
626 if (fDebug>10) Info("FindJets","Checking if cone move small enough");
627 fDistP = TMath::Sqrt( ((fJetEta-fEtaB)*(fJetEta-fEtaB)) + ((fJetPhi-fPhiB)*(fJetPhi-fPhiB)) );
628 // if(fDistP <= fMinMove) break;
629
630
631 //Find the distance cone centre is from initiator cell
632 if (fDebug>10) Info("FindJets","Checking if cone move too large");
633 fDistI = TMath::Sqrt( ((fJetEtaSum/fJetESum)*(fJetEtaSum/fJetESum)) + ((fJetPhiSum/fJetESum)*
634 (fJetPhiSum/fJetESum)));
635
636 if(fDistP>fMinMove && fDistI<fMaxMove)
637 {
638 fEtaB = fJetEta;
639 fPhiB = fJetPhi;
640 }//end if
641
642 }while(fDistP>fMinMove && fDistI<fMaxMove);
643
644 fJetEta = fEtaB;
645 fJetPhi = fPhiB;
646
647
648 //Step 7. Find the Jet Energy
649 if (fDebug>1) Info("FindJets","Looking for Jet energy");
650 fJetESum = 0.0;
651 fJetEtaSum = 0.0;
652 fJetPhiSum = 0.0;
653 fNumInCone = 0;
654 FindJetEnergy();
655
656 //cout<<"Number of cells in jet cone is: "<<fNumInCone<<endl;
657
658 //Step 8. Check if the jet is a valid jet
659 //Check if cluster energy is above Min allowed to be a jet
660//DID NOT DO THE COSH COMPARISON HERE -> NEED TO CHECK WHICH COMPARISON IS BEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
661 if (fDebug>5) Info("FindJets","Checking cluster is valid jet");
662 if(fJetESum < fJetEMin)
663 {
664 for(Int_t count2=0; count2<fNumUnits; count2++)
665 {
666 if(fUnit[count2].GetUnitFlag()==kInCurrentJet || fUnit[count2].GetUnitFlag()==kOutJet)
667 fUnit[count2].SetUnitFlag(kOutJet);
668 }//end for
669 if (fDebug>10) Info("FindJets","NOT a valid jet cell");
670 }else
671 {
672 for(Int_t count2=0; count2<fNumUnits; count2++)
673 {
674 if(fUnit[count2].GetUnitFlag()==kInCurrentJet)
675 {
676 // cout<<"Setting unit #"<<count2 <<" to be officially in a jet!"<<endl;
677 fUnit[count2].SetUnitFlag(kInJet);
678 }
679 }//end for
680
681 //NEED TO CHECK FINAL WEIRD ITERATION OF ETA AND PHI CHANGES!!!!!!!!!
682 // fJetPhi += fJetPhiSum/fJetESum; //CHECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
683 // fJetEta += fJetEtaSum/fJetESum; //CHECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
684
685 fNumJets++; //Incrementing number of jets found
686 StoreJetInfo(); //Storing jet info
687
688 }//end if (check cluster above Min Jet Energy)
689 }//end if (Jet Seed condition)
690 }//end (JET SEED LOOP)
691
692if (fDebug>5) Info("FindJets","End of BIG iteration number %i",fNumIter);
693// this->Dump();
694 fNumIter++;
695 }//end 10 iteration WHILE LOOP
696 }
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