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4c039060 | 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 | ||
f531a546 | 16 | // $Id$ |
4c039060 | 17 | |
959fbac5 | 18 | /////////////////////////////////////////////////////////////////////////// |
19 | // Class AliJet | |
20 | // Creation and investigation of a jet of particle tracks. | |
21 | // An AliJet can be constructed by adding AliTracks. | |
22 | // | |
c1f25d1d | 23 | // To provide maximal flexibility to the user, two modes of track storage |
24 | // are provided by means of the memberfunction SetTrackCopy(). | |
25 | // | |
26 | // a) SetTrackCopy(0) (which is the default). | |
27 | // Only the pointers of the 'added' tracks are stored. | |
28 | // This mode is typically used by making jet studies based on a fixed list | |
29 | // of tracks which stays under user control or is contained for instance | |
30 | // in an AliEvent. | |
31 | // In this way the AliJet just represents a 'logical structure' for the | |
32 | // physics analysis which can be embedded in e.g. an AliEvent or AliVertex. | |
35044448 | 33 | // |
34 | // Note : | |
c1f25d1d | 35 | // Modifications made to the original tracks also affect the AliTrack objects |
36 | // which are stored in the AliJet. | |
35044448 | 37 | // |
c1f25d1d | 38 | // b) SetTrackCopy(1). |
39 | // Of every 'added' track a private copy will be made of which the pointer | |
40 | // will be stored. | |
41 | // In this way the AliJet represents an entity on its own and modifications | |
42 | // made to the original tracks do not affect the AliTrack objects which are | |
43 | // stored in the AliJet. | |
44 | // This mode will allow 'adding' many different AliTracks into an AliJet by | |
45 | // creating only one AliTrack instance in the main programme and using the | |
46 | // AliTrack::Reset() and AliTrack parameter setting memberfunctions. | |
47 | // | |
8e8e6c7f | 48 | // See also the documentation provided for the memberfunction SetOwner(). |
49 | // | |
959fbac5 | 50 | // Coding example to make 2 jets j1 and j2. |
51 | // ---------------------------------------- | |
c1f25d1d | 52 | // j1 contains the AliTracks t1 and t2 |
53 | // j2 contains 10 different AliTracks via tx | |
959fbac5 | 54 | // |
c1f25d1d | 55 | // AliTrack t1,t2; |
959fbac5 | 56 | // ... |
57 | // ... // code to fill the AliTrack data | |
58 | // ... | |
c1f25d1d | 59 | // AliJet j1(); |
f531a546 | 60 | // j1.AddTrack(t1); |
61 | // j1.AddTrack(t2); | |
c1f25d1d | 62 | // |
63 | // AliJet j2(); | |
64 | // j2.SetTrackCopy(1); | |
65 | // AliTrack* tx=new AliTrack(); | |
66 | // for (Int_t i=0; i<10; i++) | |
67 | // { | |
68 | // ... | |
69 | // ... // code to set momentum etc... of the track tx | |
70 | // ... | |
71 | // j2.AddTrack(tx); | |
72 | // tx->Reset(); | |
73 | // } | |
959fbac5 | 74 | // |
84bb7c66 | 75 | // j1.Data(); |
76 | // j2.Data("sph"); | |
959fbac5 | 77 | // |
78 | // Float_t e1=j1.GetEnergy(); | |
79 | // Float_t pnorm=j1->GetMomentum(); | |
80 | // Ali3Vector p=j1->Get3Momentum(); | |
81 | // Float_t m=j1.GetInvmass(); | |
82 | // Int_t ntk=j1.GetNtracks(); | |
83 | // AliTrack* tj=j1.GetTrack(1); | |
84 | // | |
c1f25d1d | 85 | // delete tx; |
86 | // | |
959fbac5 | 87 | // Note : All quantities are in GeV, GeV/c or GeV/c**2 |
88 | // | |
89 | //--- Author: Nick van Eijndhoven 10-jul-1997 UU-SAP Utrecht | |
f531a546 | 90 | //- Modified: NvE $Date$ UU-SAP Utrecht |
959fbac5 | 91 | /////////////////////////////////////////////////////////////////////////// |
92 | ||
d88f97cc | 93 | #include "AliJet.h" |
c72198f1 | 94 | #include "Riostream.h" |
d88f97cc | 95 | |
96 | ClassImp(AliJet) // Class implementation to enable ROOT I/O | |
97 | ||
387a745b | 98 | AliJet::AliJet() : TNamed(),Ali4Vector() |
d88f97cc | 99 | { |
100 | // Default constructor | |
101 | // All variables initialised to 0 | |
102 | // Initial maximum number of tracks is set to the default value | |
6516b62d | 103 | Init(); |
104 | Reset(); | |
105 | SetNtinit(); | |
106 | } | |
107 | /////////////////////////////////////////////////////////////////////////// | |
108 | void AliJet::Init() | |
109 | { | |
110 | // Initialisation of pointers etc... | |
d88f97cc | 111 | fTracks=0; |
112 | fNtinit=0; | |
c1f25d1d | 113 | fTrackCopy=0; |
ea0b5b7f | 114 | fSelected=0; |
d88f97cc | 115 | } |
116 | /////////////////////////////////////////////////////////////////////////// | |
387a745b | 117 | AliJet::AliJet(Int_t n) : TNamed(),Ali4Vector() |
d88f97cc | 118 | { |
119 | // Create a jet to hold initially a maximum of n tracks | |
120 | // All variables initialised to 0 | |
6516b62d | 121 | Init(); |
d88f97cc | 122 | Reset(); |
123 | if (n > 0) | |
124 | { | |
125 | SetNtinit(n); | |
126 | } | |
127 | else | |
128 | { | |
129 | cout << endl; | |
130 | cout << " *AliJet* Initial max. number of tracks entered : " << n << endl; | |
131 | cout << " This is invalid. Default initial maximum will be used." << endl; | |
132 | cout << endl; | |
133 | SetNtinit(); | |
134 | } | |
135 | } | |
136 | /////////////////////////////////////////////////////////////////////////// | |
137 | AliJet::~AliJet() | |
138 | { | |
139 | // Default destructor | |
c1f25d1d | 140 | if (fTracks) |
141 | { | |
c1f25d1d | 142 | delete fTracks; |
143 | fTracks=0; | |
144 | } | |
ea0b5b7f | 145 | if (fSelected) |
146 | { | |
147 | delete fSelected; | |
148 | fSelected=0; | |
149 | } | |
d88f97cc | 150 | } |
151 | /////////////////////////////////////////////////////////////////////////// | |
8e8e6c7f | 152 | void AliJet::SetOwner(Bool_t own) |
153 | { | |
154 | // Set ownership of all added objects. | |
155 | // The default parameter is own=kTRUE. | |
156 | // | |
157 | // Invokation of this memberfunction also sets all the copy modes | |
158 | // (e.g. TrackCopy & co.) according to the value of own. | |
159 | // | |
160 | // This function (with own=kTRUE) is particularly useful when reading data | |
161 | // from a tree/file, since Reset() will then actually remove all the | |
162 | // added objects from memory irrespective of the copy mode settings | |
163 | // during the tree/file creation process. In this way it provides a nice way | |
164 | // of preventing possible memory leaks in the reading/analysis process. | |
165 | // | |
166 | // In addition this memberfunction can also be used as a shortcut to set all | |
167 | // copy modes in one go during a tree/file creation process. | |
168 | // However, in this case the user has to take care to only set/change the | |
169 | // ownership (and copy mode) for empty objects (e.g. newly created objects | |
170 | // or after invokation of the Reset() memberfunction) otherwise it will | |
171 | // very likely result in inconsistent destructor behaviour. | |
172 | ||
173 | Int_t mode=1; | |
174 | if (!own) mode=0; | |
175 | if (fTracks) fTracks->SetOwner(own); | |
176 | fTrackCopy=mode; | |
177 | } | |
178 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 179 | AliJet::AliJet(const AliJet& j) : TNamed(j),Ali4Vector(j) |
6516b62d | 180 | { |
181 | // Copy constructor | |
c72198f1 | 182 | fNtinit=j.fNtinit; |
183 | fNtmax=j.fNtmax; | |
184 | fQ=j.fQ; | |
185 | fNtrk=j.fNtrk; | |
186 | fTrackCopy=j.fTrackCopy; | |
187 | fUserId=j.fUserId; | |
188 | ||
ea0b5b7f | 189 | fSelected=0; |
190 | ||
c72198f1 | 191 | fTracks=0; |
192 | if (fNtrk) | |
193 | { | |
194 | fTracks=new TObjArray(fNtmax); | |
195 | if (fTrackCopy) fTracks->SetOwner(); | |
196 | } | |
6516b62d | 197 | |
c72198f1 | 198 | for (Int_t i=1; i<=fNtrk; i++) |
6516b62d | 199 | { |
c72198f1 | 200 | AliTrack* tx=j.GetTrack(i); |
201 | if (fTrackCopy) | |
202 | { | |
5f25234b | 203 | fTracks->Add(tx->Clone()); |
c72198f1 | 204 | } |
205 | else | |
206 | { | |
207 | fTracks->Add(tx); | |
208 | } | |
6516b62d | 209 | } |
210 | } | |
211 | /////////////////////////////////////////////////////////////////////////// | |
d88f97cc | 212 | void AliJet::SetNtinit(Int_t n) |
213 | { | |
214 | // Set the initial maximum number of tracks for this jet | |
215 | fNtinit=n; | |
216 | fNtmax=n; | |
f4d1f676 | 217 | |
79830a7e | 218 | if (fTracks) |
c1f25d1d | 219 | { |
c1f25d1d | 220 | delete fTracks; |
221 | fTracks=0; | |
222 | } | |
d88f97cc | 223 | } |
224 | /////////////////////////////////////////////////////////////////////////// | |
225 | void AliJet::Reset() | |
226 | { | |
227 | // Reset all variables to 0 | |
228 | // The max. number of tracks is set to the initial value again | |
229 | fNtrk=0; | |
230 | fQ=0; | |
43bfa5be | 231 | fUserId=0; |
d88f97cc | 232 | Double_t a[4]={0,0,0,0}; |
233 | SetVector(a,"sph"); | |
234 | if (fNtinit > 0) SetNtinit(fNtinit); | |
235 | } | |
236 | /////////////////////////////////////////////////////////////////////////// | |
1fbffa23 | 237 | void AliJet::AddTrack(AliTrack& t) |
d88f97cc | 238 | { |
35044448 | 239 | // Add a track to the jet. |
d88f97cc | 240 | // In case the maximum number of tracks has been reached |
241 | // space will be extended to hold an additional amount of tracks as | |
35044448 | 242 | // was initially reserved. |
1fbffa23 | 243 | // See SetTrackCopy() to tailor the functionality of the stored structures. |
5f25234b | 244 | // |
245 | // Note : | |
246 | // In case a private copy is made, this is performed via the Clone() memberfunction. | |
247 | // All AliTrack and derived classes have the default TObject::Clone() memberfunction. | |
248 | // However, derived classes generally contain an internal data structure which may | |
249 | // include pointers to other objects. Therefore it is recommended to provide | |
250 | // for all derived classes a specific copy constructor and override the default Clone() | |
251 | // memberfunction using this copy constructor. | |
252 | // An example for this may be seen from AliTrack. | |
253 | ||
1fbffa23 | 254 | AddTrack(t,1); |
255 | } | |
256 | /////////////////////////////////////////////////////////////////////////// | |
257 | void AliJet::AddTrack(AliTrack& t,Int_t copy) | |
258 | { | |
259 | // Internal memberfunction to actually add a track to the jet. | |
260 | // In case the maximum number of tracks has been reached | |
261 | // space will be extended to hold an additional amount of tracks as | |
262 | // was initially reserved. | |
263 | // | |
264 | // If copy=0 NO copy of the track will be made, irrespective of the setting | |
265 | // of the TrackCopy flag. | |
266 | // This allows a proper treatment of automatically generated connecting | |
267 | // tracks between vertices. | |
5f25234b | 268 | // |
269 | // Note : | |
270 | // In case a private copy is made, this is performed via the Clone() memberfunction. | |
271 | ||
6516b62d | 272 | if (!fTracks) |
273 | { | |
274 | fTracks=new TObjArray(fNtmax); | |
275 | if (fTrackCopy) fTracks->SetOwner(); | |
276 | } | |
d88f97cc | 277 | if (fNtrk == fNtmax) // Check if maximum track number is reached |
278 | { | |
279 | fNtmax+=fNtinit; | |
280 | fTracks->Expand(fNtmax); | |
281 | } | |
282 | ||
283 | // Add the track to this jet | |
284 | fNtrk++; | |
6516b62d | 285 | if (fTrackCopy && copy) |
c1f25d1d | 286 | { |
5f25234b | 287 | fTracks->Add(t.Clone()); |
c1f25d1d | 288 | } |
289 | else | |
290 | { | |
291 | fTracks->Add(&t); | |
292 | } | |
35044448 | 293 | |
d88f97cc | 294 | (*this)+=(Ali4Vector&)t; |
295 | fQ+=t.GetCharge(); | |
35044448 | 296 | |
d88f97cc | 297 | } |
298 | /////////////////////////////////////////////////////////////////////////// | |
84bb7c66 | 299 | void AliJet::Data(TString f) |
d88f97cc | 300 | { |
301 | // Provide jet information within the coordinate frame f | |
5f25234b | 302 | const char* name=GetName(); |
303 | const char* title=GetTitle(); | |
304 | ||
305 | cout << " *AliJet::Data*"; | |
306 | if (strlen(name)) cout << " Name : " << GetName(); | |
307 | if (strlen(title)) cout << " Title : " << GetTitle(); | |
308 | cout << endl; | |
387a745b | 309 | cout << " Id : " << fUserId << " Invmass : " << GetInvmass() << " Charge : " << fQ |
ea0b5b7f | 310 | << " Momentum : " << GetMomentum() << endl; |
311 | ||
312 | ShowTracks(0); | |
c72198f1 | 313 | |
84bb7c66 | 314 | Ali4Vector::Data(f); |
d88f97cc | 315 | } |
316 | /////////////////////////////////////////////////////////////////////////// | |
317 | void AliJet::List(TString f) | |
318 | { | |
319 | // Provide jet and primary track information within the coordinate frame f | |
320 | ||
84bb7c66 | 321 | Data(f); // Information of the current jet |
d88f97cc | 322 | |
323 | // The tracks of this jet | |
324 | AliTrack* t; | |
325 | for (Int_t it=1; it<=fNtrk; it++) | |
326 | { | |
327 | t=GetTrack(it); | |
328 | if (t) | |
329 | { | |
330 | cout << " ---Track no. " << it << endl; | |
331 | cout << " "; | |
84bb7c66 | 332 | t->Data(f); |
d88f97cc | 333 | } |
334 | else | |
335 | { | |
336 | cout << " *AliJet::List* Error : No track present." << endl; | |
337 | } | |
338 | } | |
339 | } | |
340 | /////////////////////////////////////////////////////////////////////////// | |
341 | void AliJet::ListAll(TString f) | |
342 | { | |
343 | // Provide jet and prim.+sec. track information within the coordinate frame f | |
344 | ||
84bb7c66 | 345 | Data(f); // Information of the current jet |
d88f97cc | 346 | |
347 | // The tracks of this jet | |
348 | AliTrack* t; | |
349 | for (Int_t it=1; it<=fNtrk; it++) | |
350 | { | |
351 | t=GetTrack(it); | |
352 | if (t) | |
353 | { | |
354 | cout << " ---Track no. " << it << endl; | |
355 | cout << " "; | |
356 | t->ListAll(f); | |
357 | } | |
358 | else | |
359 | { | |
360 | cout << " *AliJet::List* Error : No track present." << endl; | |
361 | } | |
362 | } | |
363 | } | |
364 | /////////////////////////////////////////////////////////////////////////// | |
325b076c | 365 | Int_t AliJet::GetNtracks(Int_t idmode,Int_t chmode,Int_t pcode) |
d88f97cc | 366 | { |
325b076c | 367 | // Provide the number of user selected tracks in this jet based on the |
368 | // idmode, chmode and pcode selections as specified by the user. | |
369 | // For specification of the selection parameters see GetTracks(). | |
370 | // The default parameters correspond to no selection, which implies | |
371 | // that invokation of GetNtracks() just returns the total number of | |
372 | // tracks registered in this jet. | |
373 | // | |
374 | // Note : In case certain selections are specified, this function | |
375 | // invokes GetTracks(idmode,chmode,pcode) to determine the | |
376 | // number of tracks corresponding to the selections. | |
377 | // When the jet contains a large number of tracks, invokation | |
378 | // of GetTracks(idmode,chmode,pcode) and subsequently invoking | |
379 | // GetEntries() for the resulting TObjArray* might be slightly | |
380 | // faster. | |
381 | ||
382 | Int_t n=0; | |
383 | if (idmode==0 && chmode==2 && pcode==0) | |
384 | { | |
385 | return fNtrk; | |
386 | } | |
387 | else | |
388 | { | |
389 | TObjArray* arr=GetTracks(idmode,chmode,pcode); | |
390 | n=arr->GetEntries(); | |
391 | return n; | |
392 | } | |
d88f97cc | 393 | } |
394 | /////////////////////////////////////////////////////////////////////////// | |
395 | Double_t AliJet::GetEnergy() | |
396 | { | |
397 | // Return the total energy of the jet | |
398 | return GetScalar(); | |
399 | } | |
400 | /////////////////////////////////////////////////////////////////////////// | |
401 | Double_t AliJet::GetMomentum() | |
402 | { | |
403 | // Return the value of the total jet 3-momentum | |
d071d629 | 404 | // The error can be obtained by invoking GetResultError() after |
405 | // invokation of GetMomentum(). | |
406 | Double_t norm=fV.GetNorm(); | |
407 | fDresult=fV.GetResultError(); | |
408 | return norm; | |
d88f97cc | 409 | } |
410 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 411 | Ali3Vector AliJet::Get3Momentum() const |
d88f97cc | 412 | { |
413 | // Return the the total jet 3-momentum | |
414 | Ali3Vector p=Get3Vector(); | |
415 | return p; | |
416 | } | |
417 | /////////////////////////////////////////////////////////////////////////// | |
418 | Double_t AliJet::GetInvmass() | |
419 | { | |
420 | // Return the invariant mass of the jet | |
421 | Double_t m2=Dot(*this); | |
422 | if (m2>0) | |
423 | { | |
424 | return sqrt(m2); | |
425 | } | |
426 | else | |
427 | { | |
428 | return 0; | |
429 | } | |
430 | } | |
431 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 432 | Float_t AliJet::GetCharge() const |
d88f97cc | 433 | { |
434 | // Return the total charge of the jet | |
435 | return fQ; | |
436 | } | |
437 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 438 | AliTrack* AliJet::GetTrack(Int_t i) const |
d88f97cc | 439 | { |
440 | // Return the i-th track of this jet | |
ea0b5b7f | 441 | |
442 | if (!fTracks) return 0; | |
443 | ||
444 | if (i<=0 || i>fNtrk) | |
f34f4acb | 445 | { |
ea0b5b7f | 446 | cout << " *AliJet*::GetTrack* Invalid argument i : " << i |
447 | << " Ntrk = " << fNtrk << endl; | |
f34f4acb | 448 | return 0; |
449 | } | |
450 | else | |
451 | { | |
ea0b5b7f | 452 | return (AliTrack*)fTracks->At(i-1); |
f34f4acb | 453 | } |
d88f97cc | 454 | } |
455 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 456 | AliTrack* AliJet::GetIdTrack(Int_t id) const |
43bfa5be | 457 | { |
458 | // Return the track with user identifier "id" of this jet | |
4f368c8c | 459 | if (!fTracks) return 0; |
460 | ||
43bfa5be | 461 | AliTrack* tx=0; |
4f368c8c | 462 | for (Int_t i=0; i<fNtrk; i++) |
43bfa5be | 463 | { |
4f368c8c | 464 | tx=(AliTrack*)fTracks->At(i); |
465 | if (id == tx->GetId()) return tx; | |
43bfa5be | 466 | } |
4f368c8c | 467 | return 0; // No matching id found |
43bfa5be | 468 | } |
469 | /////////////////////////////////////////////////////////////////////////// | |
ea0b5b7f | 470 | TObjArray* AliJet::GetTracks(Int_t idmode,Int_t chmode,Int_t pcode) |
471 | { | |
472 | // Provide references to user selected tracks based on the idmode, chmode | |
473 | // and pcode selections as specified by the user. | |
474 | // | |
475 | // The following selection combinations are available : | |
476 | // ---------------------------------------------------- | |
477 | // idmode = -1 ==> Select tracks with negative user identifier "id" | |
478 | // 0 ==> No selection on user identifier | |
479 | // 1 ==> Select tracks with positive user identifier "id" | |
480 | // | |
481 | // chmode = -1 ==> Select tracks with negative charge | |
482 | // 0 ==> Select neutral tracks | |
483 | // 1 ==> Select tracks with positive charge | |
484 | // 2 ==> No selection on charge | |
325b076c | 485 | // 3 ==> Select all charged tracks |
ea0b5b7f | 486 | // |
487 | // pcode = 0 ==> No selection on particle code | |
488 | // X ==> Select tracks with particle code +X or -X | |
489 | // This allows selection of both particles and anti-particles | |
490 | // in case of PDG particle codes. | |
491 | // Selection of either particles or anti-particles can be | |
492 | // obtained in combination with the "chmode" selector. | |
493 | // | |
494 | // Examples : | |
495 | // ---------- | |
496 | // idmode=-1 chmode=0 pcode=0 : Selection of all neutral tracks with negative id. | |
497 | // idmode=0 chmode=2 pcode=211 : Selection of all charged pions (PDG convention). | |
498 | // idmode=0 chmode=1 pcode=321 : Selection of all positive kaons (PDG convention). | |
499 | // | |
500 | // The default values are idmode=0 chmode=2 pcode=0 (i.e. no selections applied). | |
501 | // | |
502 | // Notes : | |
503 | // ------- | |
504 | // 1) In case the user has labeled simulated tracks with negative id and | |
505 | // reconstructed tracks with positive id, this memberfunction provides | |
506 | // easy access to either all simulated or reconstructed tracks. | |
507 | // 2) Subsequent invokations of this memberfunction with e.g. chmode=-1 and chmode=1 | |
508 | // provides a convenient way to investigate particle pairs with opposite charge | |
509 | // (e.g. for invariant mass analysis). | |
510 | ||
511 | if (fSelected) | |
512 | { | |
513 | fSelected->Clear(); | |
514 | } | |
515 | else | |
516 | { | |
517 | fSelected=new TObjArray(); | |
518 | } | |
519 | ||
520 | if (!fTracks) return fSelected; | |
521 | ||
522 | AliTrack* tx=0; | |
523 | Int_t code=0; | |
524 | Int_t id=0; | |
525 | Float_t q=0; | |
526 | for (Int_t i=0; i<fNtrk; i++) | |
527 | { | |
528 | tx=(AliTrack*)fTracks->At(i); | |
529 | if (!tx) continue; | |
530 | ||
531 | code=tx->GetParticleCode(); | |
532 | if (pcode && abs(pcode)!=abs(code)) continue; | |
533 | ||
534 | id=tx->GetId(); | |
535 | if (idmode==-1 && id>=0) continue; | |
536 | if (idmode==1 && id<=0) continue; | |
537 | ||
538 | q=tx->GetCharge(); | |
539 | if (chmode==-1 && q>=0) continue; | |
540 | if (chmode==0 && fabs(q)>1e-10) continue; | |
541 | if (chmode==1 && q<=0) continue; | |
325b076c | 542 | if (chmode==3 && fabs(q)<1e-10) continue; |
ea0b5b7f | 543 | |
544 | fSelected->Add(tx); | |
545 | } | |
546 | ||
547 | return fSelected; | |
548 | } | |
549 | /////////////////////////////////////////////////////////////////////////// | |
325b076c | 550 | void AliJet::ShowTracks(Int_t mode) |
ea0b5b7f | 551 | { |
552 | // Provide an overview of the available tracks. | |
553 | // The argument mode determines the amount of information as follows : | |
554 | // mode = 0 ==> Only printout of the number of tracks | |
555 | // 1 ==> Provide a listing with 1 line of info for each track | |
556 | // | |
557 | // The default is mode=1. | |
558 | // | |
559 | Int_t ntk=GetNtracks(); | |
560 | if (ntk) | |
561 | { | |
562 | if (!mode) | |
563 | { | |
564 | cout << " There are " << ntk << " tracks available." << endl; | |
565 | } | |
566 | else | |
567 | { | |
568 | cout << " The following " << ntk << " tracks are available :" << endl; | |
569 | for (Int_t i=1; i<=ntk; i++) | |
570 | { | |
571 | AliTrack* tx=GetTrack(i); | |
572 | if (tx) | |
573 | { | |
574 | const char* name=tx->GetName(); | |
575 | const char* title=tx->GetTitle(); | |
576 | cout << " Track : " << i; | |
577 | cout << " Id : " << tx->GetId(); | |
578 | cout << " Q : " << tx->GetCharge() << " m : " << tx->GetMass() << " p : " << tx->GetMomentum(); | |
579 | if (strlen(name)) cout << " Name : " << name; | |
580 | if (strlen(title)) cout << " Title : " << title; | |
581 | cout << endl; | |
582 | } | |
583 | } | |
584 | } | |
585 | } | |
586 | else | |
587 | { | |
588 | cout << " No tracks are present." << endl; | |
589 | } | |
590 | } | |
591 | /////////////////////////////////////////////////////////////////////////// | |
d071d629 | 592 | Double_t AliJet::GetPt() |
593 | { | |
594 | // Provide trans. momentum value w.r.t. z-axis. | |
595 | // The error on the value can be obtained by GetResultError() | |
596 | // after invokation of GetPt(). | |
597 | Ali3Vector v; | |
598 | v=GetVecTrans(); | |
599 | Double_t norm=v.GetNorm(); | |
600 | fDresult=v.GetResultError(); | |
601 | ||
602 | return norm; | |
603 | } | |
604 | /////////////////////////////////////////////////////////////////////////// | |
605 | Double_t AliJet::GetPl() | |
606 | { | |
607 | // Provide long. momentum value w.r.t. z-axis. | |
8adaf597 | 608 | // Note : the returned value can also be negative. |
d071d629 | 609 | // The error on the value can be obtained by GetResultError() |
610 | // after invokation of GetPl(). | |
611 | Ali3Vector v; | |
612 | v=GetVecLong(); | |
8adaf597 | 613 | |
614 | Double_t pl=v.GetNorm(); | |
d071d629 | 615 | fDresult=v.GetResultError(); |
616 | ||
8adaf597 | 617 | Double_t a[3]; |
618 | v.GetVector(a,"sph"); | |
619 | if (cos(a[1])<0) pl=-pl; | |
620 | ||
621 | return pl; | |
d071d629 | 622 | } |
623 | /////////////////////////////////////////////////////////////////////////// | |
624 | Double_t AliJet::GetEt() | |
625 | { | |
626 | // Provide trans. energy value w.r.t. z-axis. | |
627 | // The error on the value can be obtained by GetResultError() | |
628 | // after invokation of GetEt(). | |
629 | Double_t et=GetScaTrans(); | |
630 | ||
631 | return et; | |
632 | } | |
633 | /////////////////////////////////////////////////////////////////////////// | |
634 | Double_t AliJet::GetEl() | |
635 | { | |
636 | // Provide long. energy value w.r.t. z-axis. | |
8adaf597 | 637 | // Note : the returned value can also be negative. |
d071d629 | 638 | // The error on the value can be obtained by GetResultError() |
639 | // after invokation of GetEl(). | |
640 | Double_t el=GetScaLong(); | |
641 | ||
642 | return el; | |
643 | } | |
644 | /////////////////////////////////////////////////////////////////////////// | |
645 | Double_t AliJet::GetMt() | |
646 | { | |
647 | // Provide transverse mass value w.r.t. z-axis. | |
648 | // The error on the value can be obtained by GetResultError() | |
649 | // after invokation of GetMt(). | |
650 | Double_t pt=GetPt(); | |
651 | Double_t dpt=GetResultError(); | |
652 | Double_t m=GetInvmass(); | |
653 | Double_t dm=GetResultError(); | |
654 | ||
655 | Double_t mt=sqrt(pt*pt+m*m); | |
656 | Double_t dmt2=0; | |
657 | if (mt) dmt2=(pow((pt*dpt),2)+pow((m*dm),2))/(mt*mt); | |
658 | ||
659 | fDresult=sqrt(dmt2); | |
660 | return mt; | |
661 | } | |
662 | /////////////////////////////////////////////////////////////////////////// | |
8adaf597 | 663 | Double_t AliJet::GetRapidity() |
664 | { | |
665 | // Provide rapidity value w.r.t. z-axis. | |
666 | // The error on the value can be obtained by GetResultError() | |
667 | // after invokation of GetRapidity(). | |
668 | // Note : Also GetPseudoRapidity() is available since this class is | |
669 | // derived from Ali4Vector. | |
670 | Double_t e=GetEnergy(); | |
671 | Double_t de=GetResultError(); | |
672 | Double_t pl=GetPl(); | |
673 | Double_t dpl=GetResultError(); | |
674 | Double_t sum=e+pl; | |
675 | Double_t dif=e-pl; | |
676 | ||
677 | Double_t y=9999,dy2=0; | |
678 | if (sum && dif) y=0.5*log(sum/dif); | |
679 | ||
680 | if (sum*dif) dy2=(1./(sum*dif))*(pow((pl*de),2)+pow((e*dpl),2)); | |
681 | ||
682 | fDresult=sqrt(dy2); | |
683 | return y; | |
684 | } | |
685 | /////////////////////////////////////////////////////////////////////////// | |
c1f25d1d | 686 | void AliJet::SetTrackCopy(Int_t j) |
687 | { | |
688 | // (De)activate the creation of private copies of the added tracks. | |
689 | // j=0 ==> No private copies are made; pointers of original tracks are stored. | |
690 | // j=1 ==> Private copies of the tracks are made and these pointers are stored. | |
691 | // | |
692 | // Note : Once the storage contains pointer(s) to AliTrack(s) one cannot | |
693 | // change the TrackCopy mode anymore. | |
694 | // To change the TrackCopy mode for an existing AliJet containing | |
695 | // tracks one first has to invoke Reset(). | |
696 | if (!fTracks) | |
697 | { | |
698 | if (j==0 || j==1) | |
699 | { | |
700 | fTrackCopy=j; | |
701 | } | |
702 | else | |
703 | { | |
704 | cout << "*AliJet::SetTrackCopy* Invalid argument : " << j << endl; | |
705 | } | |
706 | } | |
707 | else | |
708 | { | |
709 | cout << "*AliJet::SetTrackCopy* Storage already contained tracks." | |
710 | << " ==> TrackCopy mode not changed." << endl; | |
711 | } | |
712 | } | |
713 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 714 | Int_t AliJet::GetTrackCopy() const |
c1f25d1d | 715 | { |
716 | // Provide value of the TrackCopy mode. | |
717 | // 0 ==> No private copies are made; pointers of original tracks are stored. | |
718 | // 1 ==> Private copies of the tracks are made and these pointers are stored. | |
719 | return fTrackCopy; | |
720 | } | |
721 | /////////////////////////////////////////////////////////////////////////// | |
43bfa5be | 722 | void AliJet::SetId(Int_t id) |
723 | { | |
724 | // Set a user defined identifier for this jet. | |
725 | fUserId=id; | |
726 | } | |
727 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 728 | Int_t AliJet::GetId() const |
43bfa5be | 729 | { |
730 | // Provide the user defined identifier of this jet. | |
731 | return fUserId; | |
732 | } | |
733 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 734 | TObject* AliJet::Clone(const char* name) const |
5f25234b | 735 | { |
736 | // Make a deep copy of the current object and provide the pointer to the copy. | |
737 | // This memberfunction enables automatic creation of new objects of the | |
738 | // correct type depending on the object type, a feature which may be very useful | |
739 | // for containers when adding objects in case the container owns the objects. | |
740 | // This feature allows e.g. AliVertex to store either AliJet objects or | |
741 | // objects derived from AliJet via the AddJet memberfunction, provided | |
742 | // these derived classes also have a proper Clone memberfunction. | |
743 | ||
744 | AliJet* jet=new AliJet(*this); | |
745 | if (name) | |
746 | { | |
747 | if (strlen(name)) jet->SetName(name); | |
748 | } | |
749 | return jet; | |
750 | } | |
751 | /////////////////////////////////////////////////////////////////////////// |