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5240525e | 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 | ||
0bc3b8ed | 16 | /* $Id$ */ |
17 | ||
5240525e | 18 | //_________________________________________________________________________ |
19 | // Class to calculate jet chararacteristics | |
20 | // | |
0bc3b8ed | 21 | // This class implements for PHOS a jet finder for PHOS. It depends on a |
22 | // energy seed | |
23 | // minimum energy, cone radius and movement of the cone. | |
5240525e | 24 | //*-- Author : D.Peressounko |
25 | ////////////////////////////////////////////////////////////////////////////// | |
26 | ||
27 | // --- ROOT system --- | |
28 | #include "TParticle.h" | |
29 | ||
30 | // --- Standard library --- | |
31 | ||
32 | // --- AliRoot header files --- | |
33 | #include "AliPHOSJet.h" | |
34 | // #include "AliPHOSGetter.h" | |
35 | ||
36 | ClassImp(AliPHOSJet) | |
37 | ||
38 | //____________________________________________________________________________ | |
3f7dbdb7 | 39 | AliPHOSJet::AliPHOSJet(): |
40 | fNpart(0), | |
41 | fList(0), | |
42 | fConeRad(0), | |
43 | fMaxConeMove(0), | |
44 | fMinConeMove(0), | |
45 | fSumEnergy(0), | |
46 | fSumEta(0), | |
47 | fSumPhi(0), | |
48 | fEnergy(0), | |
49 | fEta(0), | |
50 | fPhi(0), | |
51 | fLEnergy(0), | |
52 | fLEta(0), | |
53 | fLPhi(0) | |
54 | { | |
351dd634 | 55 | //Initialize members |
5240525e | 56 | } |
57 | ||
3f7dbdb7 | 58 | //____________________________________________________________________________ |
59 | AliPHOSJet::AliPHOSJet(const AliPHOSJet & jet) : | |
60 | TObject(jet), | |
61 | fNpart(0), | |
62 | fList(0), | |
63 | fConeRad(0), | |
64 | fMaxConeMove(0), | |
65 | fMinConeMove(0), | |
66 | fSumEnergy(0), | |
67 | fSumEta(0), | |
68 | fSumPhi(0), | |
69 | fEnergy(0), | |
70 | fEta(0), | |
71 | fPhi(0), | |
72 | fLEnergy(0), | |
73 | fLEta(0), | |
74 | fLPhi(0) | |
75 | { | |
76 | // copy ctor: no implementation yet | |
77 | Fatal("cpy ctor", "not implemented") ; | |
78 | } | |
79 | ||
80 | ||
5240525e | 81 | //____________________________________________________________________________ |
82 | AliPHOSJet::~AliPHOSJet(){ | |
0bc3b8ed | 83 | //dtor |
5240525e | 84 | if(fList){ |
85 | delete fList ; | |
86 | fList = 0 ; | |
87 | } | |
88 | ||
89 | } | |
90 | //____________________________________________________________________________ | |
fc7e2f43 | 91 | void AliPHOSJet::AddParticle(const TParticle * p, Int_t index){ |
5240525e | 92 | //adds particle to jet. Calculates change in jet direction, |
93 | //due to addition of this particle and if it is smaller, than fMaxDev, | |
94 | //add particle, axcept new direction and return true. | |
95 | ||
96 | fSumEnergy+=p->Energy() ; | |
97 | if(p->Pt()/p->Energy() > 0.001) | |
98 | fSumEta+=p->Eta()*p->Energy() ; | |
99 | else | |
100 | fSumEta+=100.*p->Pz() ; | |
101 | fSumPhi+=p->Phi()*p->Energy() ; | |
102 | ||
103 | //check if this a leading particle? | |
104 | if(fLEnergy < p->Energy()){ | |
105 | fLEnergy = p->Energy() ; | |
106 | if(p->Pt()/p->Energy() > 0.001) | |
107 | fLEta = p->Eta() ; | |
108 | else | |
109 | fLEta = 100.*p->Pz()/p->Energy() ; | |
110 | fLPhi = p->Phi() ; | |
111 | } | |
112 | ||
113 | if(index >=0){ //add index to list of indexes | |
114 | if(!fList){ | |
115 | fList = new TArrayI(100) ; | |
116 | } | |
117 | if(fList->GetSize()<=fNpart+1){ | |
118 | TArrayI * tmp = new TArrayI(fNpart*2) ; | |
119 | tmp->Adopt(fList->GetSize(),fList->GetArray()) ; //note, we should not delete old array! | |
120 | fList=tmp ; | |
121 | } | |
122 | fList->AddAt(index,fNpart++) ; | |
123 | } | |
124 | } | |
125 | //____________________________________________________________________________ | |
fc7e2f43 | 126 | void AliPHOSJet::AddDigit(Double_t e, Double_t eta, Double_t phi, Int_t index){ |
5240525e | 127 | //adds particle to jet. Calculates change in jet direction, |
128 | //due to addition of this particle and if it is smaller, than fMaxDev, | |
129 | //add particle, axcept new direction and return true. | |
130 | ||
131 | fSumEnergy+=e ; | |
132 | fSumEta+=eta*e ; | |
133 | fSumPhi+=phi*e ; | |
134 | ||
135 | //check if this a leading particle? | |
136 | if(fLEnergy < e){ | |
137 | fLEnergy = e; | |
138 | fLEta = eta ; | |
139 | fLPhi = phi ; | |
140 | } | |
141 | ||
142 | if(index >=0){ //add index to list of indexes | |
143 | if(!fList){ | |
144 | fList = new TArrayI(100) ; | |
145 | } | |
146 | if(fList->GetSize()<=fNpart+1){ | |
147 | TArrayI * tmp = new TArrayI(fNpart*2) ; | |
148 | tmp->Adopt(fList->GetSize(),fList->GetArray()) ; //note, we should not delete old array! | |
149 | fList=tmp ; | |
150 | } | |
151 | fList->AddAt(index,fNpart++) ; | |
152 | } | |
153 | } | |
154 | // //____________________________________________________________________________ | |
155 | // Bool_t AliPHOSJet::IsInJet(TParticle * p,Int_t mode) | |
156 | // { | |
157 | // Double_t dEta ; | |
158 | // Double_t dPhi ; | |
159 | // Double_t energy ; | |
160 | // if(!fEnergy){ //Final values not calculated yet, use intermediate | |
161 | // if(fSumEnergy==0) | |
162 | // return kTRUE ; //First particle | |
163 | // note p->Eta() causes fpe! | |
164 | // dEta=(p->Eta() - fSumEta/fSumEnergy) ; | |
165 | // dPhi=(p->Phi() - fSumPhi/fSumEnergy) ; | |
166 | // energy = fSumEnergy ; | |
167 | // } | |
168 | // else{ //calculated with respect to final | |
169 | // dEta=(p->Eta() - fEta) ; | |
170 | // dPhi=(p->Phi() - fPhi) ; | |
171 | // energy = fEnergy ; | |
172 | // } | |
173 | ||
174 | // switch (mode){ | |
175 | // case 0: | |
176 | // return IsInCone(eta,phi) ; //pure geometrical comparison | |
177 | // case 1: | |
178 | // return AcceptConeDeviation(dEta,dPhi,p->Energy() ); | |
179 | // default: | |
351dd634 | 180 | // AliError(Form("Unknown mode of cone calculation %d \n",mode )); |
5240525e | 181 | // } |
182 | // return kFALSE ; | |
183 | //} | |
184 | //____________________________________________________________________________ | |
185 | Bool_t AliPHOSJet::AcceptConeDeviation(const TParticle * p)const | |
186 | { //Calculate cone deviation in case of inclusion of the given | |
187 | //particle to jet. | |
188 | ||
189 | Double_t tmpEnergy = fSumEnergy + p->Energy() ; | |
190 | Double_t tmpEta = fSumEta ; | |
191 | if(p->Pt()/p->Energy() >0.001) | |
192 | tmpEta+= p->Eta()*p->Energy() ; | |
193 | else | |
194 | tmpEta+= 100.*p->Pz() ; | |
195 | tmpEta = tmpEta/tmpEnergy / (fSumEta/fSumEnergy) - 1 ; | |
196 | Double_t tmpPhi = fSumPhi + p->Phi()*p->Energy() ; | |
197 | tmpPhi = tmpPhi/tmpEnergy /(fSumPhi/fSumEnergy) - 1 ; | |
198 | Double_t dev = TMath::Sqrt(tmpEta*tmpEta + tmpPhi*tmpPhi) ; | |
199 | if(dev < fMaxConeMove) | |
200 | return kTRUE ; | |
201 | else | |
202 | return kFALSE ; | |
203 | } | |
204 | //____________________________________________________________________________ | |
fc7e2f43 | 205 | Bool_t AliPHOSJet::AcceptConeDeviation(Double_t e, Double_t eta, Double_t phi)const |
5240525e | 206 | { //Calculate cone deviation in case of inclusion of the given |
207 | //particle to jet. | |
208 | ||
209 | Double_t tmpEnergy = fSumEnergy + e ; | |
210 | Double_t tmpEta = fSumEta + eta*e ; | |
211 | tmpEta = tmpEta/tmpEnergy / (fSumEta/fSumEnergy) ; | |
212 | Double_t tmpPhi = fSumPhi + phi*e ; | |
213 | tmpPhi = tmpPhi/tmpEnergy /(fSumPhi/fSumEnergy) ; | |
214 | Double_t dev = TMath::Sqrt(tmpEta*tmpEta + tmpPhi*tmpPhi) ; | |
215 | if(dev<fMaxConeMove && dev > fMinConeMove) | |
216 | return kTRUE ; | |
217 | else | |
218 | return kFALSE ; | |
219 | } | |
220 | //____________________________________________________________________________ | |
221 | Bool_t AliPHOSJet::IsInCone(const TParticle * p)const | |
0bc3b8ed | 222 | { |
223 | //Say if particle is inside the defined cone | |
5240525e | 224 | Double_t dEta ; |
225 | Double_t dPhi ; | |
226 | if(!fEnergy){ //Final values not calculated yet, use intermediate | |
227 | if(fSumEnergy==0) | |
228 | return kTRUE ; //First particle | |
229 | if(p->Pt()/p->Energy() > 0.001) | |
230 | dEta=(p->Eta() - fSumEta/fSumEnergy) ; | |
231 | else | |
232 | dEta=(100.*p->Pz()/p->Energy() - fSumEta/fSumEnergy) ; | |
233 | dPhi=(p->Phi() - fSumPhi/fSumEnergy) ; | |
234 | } | |
235 | else{ //calculated with respect to final | |
236 | if(p->Pt()/p->Energy() > 0.001) | |
237 | dEta=(p->Eta() - fEta) ; | |
238 | else | |
239 | dEta=(100.*p->Pz()/p->Energy() - fEta) ; | |
240 | dPhi=(p->Phi() - fPhi) ; | |
241 | } | |
242 | if(TMath::Sqrt(dEta*dEta + dPhi*dPhi) < fConeRad) | |
243 | return kTRUE ; | |
244 | else | |
245 | return kFALSE ; | |
246 | } | |
247 | //____________________________________________________________________________ | |
fc7e2f43 | 248 | Bool_t AliPHOSJet::IsInCone(Double_t eta, Double_t phi)const |
0bc3b8ed | 249 | { |
250 | //Says if particle is inside the defined cone | |
5240525e | 251 | Double_t dEta ; |
252 | Double_t dPhi ; | |
253 | if(!fEnergy){ //Final values not calculated yet, use intermediate | |
254 | if(fSumEnergy==0) | |
255 | return kTRUE ; //First particle | |
256 | dEta=(eta - fSumEta/fSumEnergy) ; | |
257 | dPhi=(phi - fSumPhi/fSumEnergy) ; | |
258 | } | |
259 | else{ //calculated with respect to final | |
260 | dEta=(eta - fEta) ; | |
261 | dPhi=(phi - fPhi) ; | |
262 | } | |
263 | if(TMath::Sqrt(dEta*dEta + dPhi*dPhi) < fConeRad) | |
264 | return kTRUE ; | |
265 | else | |
266 | return kFALSE ; | |
267 | } | |
268 | //____________________________________________________________________________ | |
269 | Double_t AliPHOSJet::DistanceToJet(const TParticle *p)const{ | |
270 | //Calculate radius | |
271 | Double_t dEta ; | |
272 | Double_t dPhi ; | |
273 | if(!fEnergy){ //Final values not calculated yet, use intermediate | |
274 | if(fSumEnergy==0) | |
275 | return kTRUE ; //First particle | |
276 | if(p->Pt()/p->Energy() > 0.001) | |
277 | dEta=(p->Eta() - fSumEta/fSumEnergy) ; | |
278 | else | |
279 | dEta=(100.*p->Pz()/p->Energy() - fSumEta/fSumEnergy) ; | |
280 | dPhi=(p->Phi() - fSumPhi/fSumEnergy) ; | |
281 | } | |
282 | else{ //calculated with respect to final | |
283 | if(p->Pt()/p->Energy() > 0.001) | |
284 | dEta=(p->Eta() - fEta) ; | |
285 | else | |
286 | dEta=(100*p->Pz()/p->Energy() - fEta) ; | |
287 | dPhi=(p->Phi() - fPhi) ; | |
288 | } | |
289 | return TMath::Sqrt(dEta*dEta + dPhi*dPhi) ; | |
290 | ||
291 | } | |
292 | //____________________________________________________________________________ | |
293 | void AliPHOSJet::CalculateAll(void){ | |
0bc3b8ed | 294 | //Calculate all jet parameters |
5240525e | 295 | if(fSumEnergy==0) |
296 | return ; //Nothing to calculate | |
297 | ||
298 | fEta = fSumEta/fSumEnergy ; | |
299 | fPhi = fSumPhi/fSumEnergy ; | |
300 | fEnergy = fSumEnergy ; | |
301 | ||
302 | fSumEnergy = 0. ; | |
303 | fSumEta = 0. ; | |
304 | fSumPhi = 0. ; | |
305 | } | |
306 | //____________________________________________________________________________ | |
702ab87e | 307 | void AliPHOSJet::Print(const Option_t *) const { |
0bc3b8ed | 308 | //Print jet parameters |
5240525e | 309 | printf("-------------- AliPHOSJet ------------\n") ; |
310 | printf(" Energy............. %f \n",fEnergy) ; | |
311 | printf(" Eta................ %f \n",fEta ) ; | |
312 | printf(" Phi................ %f \n",fPhi ) ; | |
313 | printf(" Leading Energy..... %f \n",fLEnergy) ; | |
314 | printf(" Leading Eta........ %f \n",fLEta) ; | |
315 | printf(" Leading Phi........ %f \n",fLPhi) ; | |
316 | printf(" N particles in jet %d \n",fNpart) ; | |
317 | printf("----------------------------------\n") ; | |
318 | } | |
0bc3b8ed | 319 | |
320 | ||
321 |