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