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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 | // | |
25eefd00 | 87 | // Note : By default all quantities are in GeV, GeV/c or GeV/c**2 |
88 | // but the user can indicate the usage of a different scale | |
89 | // for the energy-momentum units via the SetEscale() memberfunction. | |
90 | // The actual energy-momentum unit scale can be obtained via the | |
91 | // GetEscale() memberfunction. | |
959fbac5 | 92 | // |
93 | //--- Author: Nick van Eijndhoven 10-jul-1997 UU-SAP Utrecht | |
f531a546 | 94 | //- Modified: NvE $Date$ UU-SAP Utrecht |
959fbac5 | 95 | /////////////////////////////////////////////////////////////////////////// |
96 | ||
b09247a2 | 97 | #include <cstdlib> |
d88f97cc | 98 | #include "AliJet.h" |
c72198f1 | 99 | #include "Riostream.h" |
d88f97cc | 100 | |
101 | ClassImp(AliJet) // Class implementation to enable ROOT I/O | |
102 | ||
387a745b | 103 | AliJet::AliJet() : TNamed(),Ali4Vector() |
d88f97cc | 104 | { |
105 | // Default constructor | |
106 | // All variables initialised to 0 | |
107 | // Initial maximum number of tracks is set to the default value | |
6516b62d | 108 | Init(); |
109 | Reset(); | |
110 | SetNtinit(); | |
111 | } | |
112 | /////////////////////////////////////////////////////////////////////////// | |
113 | void AliJet::Init() | |
114 | { | |
115 | // Initialisation of pointers etc... | |
d88f97cc | 116 | fTracks=0; |
117 | fNtinit=0; | |
c1f25d1d | 118 | fTrackCopy=0; |
413d0114 | 119 | fRef=0; |
ea0b5b7f | 120 | fSelected=0; |
25eefd00 | 121 | fEscale=1; |
d88f97cc | 122 | } |
123 | /////////////////////////////////////////////////////////////////////////// | |
387a745b | 124 | AliJet::AliJet(Int_t n) : TNamed(),Ali4Vector() |
d88f97cc | 125 | { |
126 | // Create a jet to hold initially a maximum of n tracks | |
127 | // All variables initialised to 0 | |
6516b62d | 128 | Init(); |
d88f97cc | 129 | Reset(); |
130 | if (n > 0) | |
131 | { | |
132 | SetNtinit(n); | |
133 | } | |
134 | else | |
135 | { | |
136 | cout << endl; | |
137 | cout << " *AliJet* Initial max. number of tracks entered : " << n << endl; | |
138 | cout << " This is invalid. Default initial maximum will be used." << endl; | |
139 | cout << endl; | |
140 | SetNtinit(); | |
141 | } | |
142 | } | |
143 | /////////////////////////////////////////////////////////////////////////// | |
144 | AliJet::~AliJet() | |
145 | { | |
146 | // Default destructor | |
c1f25d1d | 147 | if (fTracks) |
148 | { | |
c1f25d1d | 149 | delete fTracks; |
150 | fTracks=0; | |
151 | } | |
413d0114 | 152 | if (fRef) |
153 | { | |
154 | delete fRef; | |
155 | fRef=0; | |
156 | } | |
ea0b5b7f | 157 | if (fSelected) |
158 | { | |
159 | delete fSelected; | |
160 | fSelected=0; | |
161 | } | |
d88f97cc | 162 | } |
163 | /////////////////////////////////////////////////////////////////////////// | |
8e8e6c7f | 164 | void AliJet::SetOwner(Bool_t own) |
165 | { | |
166 | // Set ownership of all added objects. | |
167 | // The default parameter is own=kTRUE. | |
168 | // | |
169 | // Invokation of this memberfunction also sets all the copy modes | |
170 | // (e.g. TrackCopy & co.) according to the value of own. | |
171 | // | |
172 | // This function (with own=kTRUE) is particularly useful when reading data | |
173 | // from a tree/file, since Reset() will then actually remove all the | |
174 | // added objects from memory irrespective of the copy mode settings | |
175 | // during the tree/file creation process. In this way it provides a nice way | |
176 | // of preventing possible memory leaks in the reading/analysis process. | |
177 | // | |
178 | // In addition this memberfunction can also be used as a shortcut to set all | |
179 | // copy modes in one go during a tree/file creation process. | |
180 | // However, in this case the user has to take care to only set/change the | |
181 | // ownership (and copy mode) for empty objects (e.g. newly created objects | |
182 | // or after invokation of the Reset() memberfunction) otherwise it will | |
183 | // very likely result in inconsistent destructor behaviour. | |
184 | ||
185 | Int_t mode=1; | |
186 | if (!own) mode=0; | |
187 | if (fTracks) fTracks->SetOwner(own); | |
188 | fTrackCopy=mode; | |
189 | } | |
190 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 191 | AliJet::AliJet(const AliJet& j) : TNamed(j),Ali4Vector(j) |
6516b62d | 192 | { |
193 | // Copy constructor | |
c72198f1 | 194 | fNtinit=j.fNtinit; |
195 | fNtmax=j.fNtmax; | |
196 | fQ=j.fQ; | |
25eefd00 | 197 | fEscale=j.fEscale; |
c72198f1 | 198 | fNtrk=j.fNtrk; |
199 | fTrackCopy=j.fTrackCopy; | |
200 | fUserId=j.fUserId; | |
413d0114 | 201 | if (j.fRef) fRef=new AliPositionObj(*(j.fRef)); |
c72198f1 | 202 | |
ea0b5b7f | 203 | fSelected=0; |
204 | ||
c72198f1 | 205 | fTracks=0; |
206 | if (fNtrk) | |
207 | { | |
208 | fTracks=new TObjArray(fNtmax); | |
209 | if (fTrackCopy) fTracks->SetOwner(); | |
210 | } | |
6516b62d | 211 | |
c72198f1 | 212 | for (Int_t i=1; i<=fNtrk; i++) |
6516b62d | 213 | { |
c72198f1 | 214 | AliTrack* tx=j.GetTrack(i); |
215 | if (fTrackCopy) | |
216 | { | |
5f25234b | 217 | fTracks->Add(tx->Clone()); |
c72198f1 | 218 | } |
219 | else | |
220 | { | |
221 | fTracks->Add(tx); | |
222 | } | |
6516b62d | 223 | } |
224 | } | |
225 | /////////////////////////////////////////////////////////////////////////// | |
d88f97cc | 226 | void AliJet::SetNtinit(Int_t n) |
227 | { | |
228 | // Set the initial maximum number of tracks for this jet | |
229 | fNtinit=n; | |
230 | fNtmax=n; | |
f4d1f676 | 231 | |
79830a7e | 232 | if (fTracks) |
c1f25d1d | 233 | { |
c1f25d1d | 234 | delete fTracks; |
235 | fTracks=0; | |
236 | } | |
413d0114 | 237 | if (fRef) |
238 | { | |
239 | delete fRef; | |
240 | fRef=0; | |
241 | } | |
d88f97cc | 242 | } |
243 | /////////////////////////////////////////////////////////////////////////// | |
244 | void AliJet::Reset() | |
245 | { | |
246 | // Reset all variables to 0 | |
247 | // The max. number of tracks is set to the initial value again | |
25eefd00 | 248 | // Note : The scale for the energy/momentum units will not be changed. |
d88f97cc | 249 | fNtrk=0; |
250 | fQ=0; | |
43bfa5be | 251 | fUserId=0; |
d88f97cc | 252 | Double_t a[4]={0,0,0,0}; |
253 | SetVector(a,"sph"); | |
254 | if (fNtinit > 0) SetNtinit(fNtinit); | |
255 | } | |
256 | /////////////////////////////////////////////////////////////////////////// | |
1fbffa23 | 257 | void AliJet::AddTrack(AliTrack& t) |
d88f97cc | 258 | { |
35044448 | 259 | // Add a track to the jet. |
d88f97cc | 260 | // In case the maximum number of tracks has been reached |
261 | // space will be extended to hold an additional amount of tracks as | |
35044448 | 262 | // was initially reserved. |
1fbffa23 | 263 | // See SetTrackCopy() to tailor the functionality of the stored structures. |
5f25234b | 264 | // |
1f241680 | 265 | // Notes : |
266 | // ------- | |
5f25234b | 267 | // In case a private copy is made, this is performed via the Clone() memberfunction. |
268 | // All AliTrack and derived classes have the default TObject::Clone() memberfunction. | |
269 | // However, derived classes generally contain an internal data structure which may | |
270 | // include pointers to other objects. Therefore it is recommended to provide | |
271 | // for all derived classes a specific copy constructor and override the default Clone() | |
272 | // memberfunction using this copy constructor. | |
273 | // An example for this may be seen from AliTrack. | |
1f241680 | 274 | // |
275 | // In case NO private copy is made, a check will be performed if this | |
276 | // specific track is already present in the jet. | |
277 | // If this is the case, no action is performed to prevent multiple | |
278 | // additions of the same track. | |
279 | ||
5f25234b | 280 | |
1fbffa23 | 281 | AddTrack(t,1); |
282 | } | |
283 | /////////////////////////////////////////////////////////////////////////// | |
284 | void AliJet::AddTrack(AliTrack& t,Int_t copy) | |
285 | { | |
286 | // Internal memberfunction to actually add a track to the jet. | |
287 | // In case the maximum number of tracks has been reached | |
288 | // space will be extended to hold an additional amount of tracks as | |
289 | // was initially reserved. | |
290 | // | |
291 | // If copy=0 NO copy of the track will be made, irrespective of the setting | |
292 | // of the TrackCopy flag. | |
293 | // This allows a proper treatment of automatically generated connecting | |
294 | // tracks between vertices. | |
5f25234b | 295 | // |
1f241680 | 296 | // In case NO copy of the track is made, a check will be performed if this |
297 | // specific track is already present in the jet. | |
298 | // If this is the case, no action is performed to prevent multiple | |
299 | // additions of the same track. | |
300 | // | |
5f25234b | 301 | // Note : |
302 | // In case a private copy is made, this is performed via the Clone() memberfunction. | |
303 | ||
6516b62d | 304 | if (!fTracks) |
305 | { | |
306 | fTracks=new TObjArray(fNtmax); | |
307 | if (fTrackCopy) fTracks->SetOwner(); | |
308 | } | |
1f241680 | 309 | else if (!fTrackCopy || !copy) // Check if this track is already present |
310 | { | |
311 | for (Int_t i=0; i<fNtrk; i++) | |
312 | { | |
313 | AliTrack* tx=(AliTrack*)fTracks->At(i); | |
314 | if (tx == &t) return; | |
315 | } | |
316 | } | |
317 | ||
d88f97cc | 318 | if (fNtrk == fNtmax) // Check if maximum track number is reached |
319 | { | |
320 | fNtmax+=fNtinit; | |
321 | fTracks->Expand(fNtmax); | |
322 | } | |
323 | ||
324 | // Add the track to this jet | |
325 | fNtrk++; | |
6516b62d | 326 | if (fTrackCopy && copy) |
c1f25d1d | 327 | { |
5f25234b | 328 | fTracks->Add(t.Clone()); |
c1f25d1d | 329 | } |
330 | else | |
331 | { | |
332 | fTracks->Add(&t); | |
333 | } | |
35044448 | 334 | |
d88f97cc | 335 | fQ+=t.GetCharge(); |
35044448 | 336 | |
25eefd00 | 337 | Ali4Vector p4=(Ali4Vector)t; |
338 | Float_t tscale=t.GetEscale(); | |
339 | if ((tscale/fEscale > 1.1) || (fEscale/tscale > 1.1)) p4=p4*(tscale/fEscale); | |
340 | (*this)+=p4; | |
341 | ||
d88f97cc | 342 | } |
343 | /////////////////////////////////////////////////////////////////////////// | |
1f241680 | 344 | void AliJet::Data(TString f,TString u) |
d88f97cc | 345 | { |
346 | // Provide jet information within the coordinate frame f | |
1f241680 | 347 | // |
348 | // The string argument "u" allows to choose between different angular units | |
349 | // in case e.g. a spherical frame is selected. | |
350 | // u = "rad" : angles provided in radians | |
351 | // "deg" : angles provided in degrees | |
352 | // | |
353 | // The defaults are f="car" and u="rad". | |
354 | ||
5f25234b | 355 | const char* name=GetName(); |
356 | const char* title=GetTitle(); | |
357 | ||
358 | cout << " *AliJet::Data*"; | |
359 | if (strlen(name)) cout << " Name : " << GetName(); | |
360 | if (strlen(title)) cout << " Title : " << GetTitle(); | |
361 | cout << endl; | |
387a745b | 362 | cout << " Id : " << fUserId << " Invmass : " << GetInvmass() << " Charge : " << fQ |
25eefd00 | 363 | << " Momentum : " << GetMomentum() << " Energy scale : " << fEscale << " GeV" << endl; |
ea0b5b7f | 364 | |
365 | ShowTracks(0); | |
c72198f1 | 366 | |
1f241680 | 367 | Ali4Vector::Data(f,u); |
d88f97cc | 368 | } |
369 | /////////////////////////////////////////////////////////////////////////// | |
1f241680 | 370 | void AliJet::List(TString f,TString u) |
d88f97cc | 371 | { |
372 | // Provide jet and primary track information within the coordinate frame f | |
1f241680 | 373 | // |
374 | // The string argument "u" allows to choose between different angular units | |
375 | // in case e.g. a spherical frame is selected. | |
376 | // u = "rad" : angles provided in radians | |
377 | // "deg" : angles provided in degrees | |
378 | // | |
379 | // The defaults are f="car" and u="rad". | |
d88f97cc | 380 | |
1f241680 | 381 | Data(f,u); // Information of the current jet |
413d0114 | 382 | if (fRef) { cout << " Ref-point :"; fRef->Data(f,u); } |
d88f97cc | 383 | |
384 | // The tracks of this jet | |
385 | AliTrack* t; | |
386 | for (Int_t it=1; it<=fNtrk; it++) | |
387 | { | |
388 | t=GetTrack(it); | |
389 | if (t) | |
390 | { | |
391 | cout << " ---Track no. " << it << endl; | |
392 | cout << " "; | |
1f241680 | 393 | t->Data(f,u); |
d88f97cc | 394 | } |
395 | else | |
396 | { | |
397 | cout << " *AliJet::List* Error : No track present." << endl; | |
398 | } | |
399 | } | |
400 | } | |
401 | /////////////////////////////////////////////////////////////////////////// | |
1f241680 | 402 | void AliJet::ListAll(TString f,TString u) |
d88f97cc | 403 | { |
404 | // Provide jet and prim.+sec. track information within the coordinate frame f | |
1f241680 | 405 | // |
406 | // The string argument "u" allows to choose between different angular units | |
407 | // in case e.g. a spherical frame is selected. | |
408 | // u = "rad" : angles provided in radians | |
409 | // "deg" : angles provided in degrees | |
410 | // | |
411 | // The defaults are f="car" and u="rad". | |
d88f97cc | 412 | |
1f241680 | 413 | Data(f,u); // Information of the current jet |
413d0114 | 414 | if (fRef) { cout << " Ref-point :"; fRef->Data(f,u); } |
d88f97cc | 415 | |
416 | // The tracks of this jet | |
417 | AliTrack* t; | |
418 | for (Int_t it=1; it<=fNtrk; it++) | |
419 | { | |
420 | t=GetTrack(it); | |
421 | if (t) | |
422 | { | |
423 | cout << " ---Track no. " << it << endl; | |
424 | cout << " "; | |
1f241680 | 425 | t->ListAll(f,u); |
d88f97cc | 426 | } |
427 | else | |
428 | { | |
429 | cout << " *AliJet::List* Error : No track present." << endl; | |
430 | } | |
431 | } | |
432 | } | |
433 | /////////////////////////////////////////////////////////////////////////// | |
325b076c | 434 | Int_t AliJet::GetNtracks(Int_t idmode,Int_t chmode,Int_t pcode) |
d88f97cc | 435 | { |
325b076c | 436 | // Provide the number of user selected tracks in this jet based on the |
437 | // idmode, chmode and pcode selections as specified by the user. | |
438 | // For specification of the selection parameters see GetTracks(). | |
439 | // The default parameters correspond to no selection, which implies | |
440 | // that invokation of GetNtracks() just returns the total number of | |
441 | // tracks registered in this jet. | |
442 | // | |
443 | // Note : In case certain selections are specified, this function | |
444 | // invokes GetTracks(idmode,chmode,pcode) to determine the | |
445 | // number of tracks corresponding to the selections. | |
446 | // When the jet contains a large number of tracks, invokation | |
447 | // of GetTracks(idmode,chmode,pcode) and subsequently invoking | |
448 | // GetEntries() for the resulting TObjArray* might be slightly | |
449 | // faster. | |
450 | ||
451 | Int_t n=0; | |
452 | if (idmode==0 && chmode==2 && pcode==0) | |
453 | { | |
454 | return fNtrk; | |
455 | } | |
456 | else | |
457 | { | |
458 | TObjArray* arr=GetTracks(idmode,chmode,pcode); | |
caa58e1a | 459 | if (arr) n=arr->GetEntries(); |
325b076c | 460 | return n; |
461 | } | |
d88f97cc | 462 | } |
463 | /////////////////////////////////////////////////////////////////////////// | |
caa58e1a | 464 | Int_t AliJet::GetNtracks(TString name) |
465 | { | |
466 | // Provide the number of tracks with the specified name. | |
467 | // | |
468 | // Note : | |
469 | // ------ | |
470 | // This facility invokes the corresponding GetTracks memberfunction | |
471 | // and as such may result in overwriting existing track selection | |
472 | // arrays. Please refer to the docs of GetTracks for further details. | |
473 | ||
474 | Int_t n=0; | |
475 | ||
476 | TObjArray* arr=GetTracks(name); | |
477 | if (arr) n=arr->GetEntries(); | |
478 | return n; | |
479 | } | |
480 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 481 | Double_t AliJet::GetEnergy(Float_t scale) |
d88f97cc | 482 | { |
25eefd00 | 483 | // Return the total energy of the jet. |
484 | // By default the energy is returned in the units as it was stored in the jet | |
485 | // structure. However, the user can select a different energy unit scale by | |
486 | // specification of the scale parameter. | |
487 | // The convention is that scale=1 corresponds to GeV, so specification | |
488 | // of scale=0.001 will provide the energy in MeV. | |
489 | // The error can be obtained by invoking GetResultError() after | |
490 | // invokation of GetEnergy(). | |
491 | Double_t E=GetScalar(); | |
492 | if (E>0) | |
493 | { | |
494 | if (scale>0) | |
495 | { | |
496 | E*=fEscale/scale; | |
497 | fDresult*=fEscale/scale; | |
498 | } | |
499 | return E; | |
500 | } | |
501 | else | |
502 | { | |
503 | return 0; | |
504 | } | |
d88f97cc | 505 | } |
506 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 507 | Double_t AliJet::GetMomentum(Float_t scale) |
d88f97cc | 508 | { |
509 | // Return the value of the total jet 3-momentum | |
25eefd00 | 510 | // By default the momentum is returned in the units as it was stored in the jet |
511 | // structure. However, the user can select a different momentum unit scale by | |
512 | // specification of the scale parameter. | |
513 | // The convention is that scale=1 corresponds to GeV/c, so specification | |
514 | // of scale=0.001 will provide the momentum in MeV/c. | |
d071d629 | 515 | // The error can be obtained by invoking GetResultError() after |
516 | // invokation of GetMomentum(). | |
25eefd00 | 517 | |
d071d629 | 518 | Double_t norm=fV.GetNorm(); |
519 | fDresult=fV.GetResultError(); | |
25eefd00 | 520 | if (scale>0) |
521 | { | |
522 | norm*=fEscale/scale; | |
523 | fDresult*=fEscale/scale; | |
524 | } | |
d071d629 | 525 | return norm; |
d88f97cc | 526 | } |
527 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 528 | Ali3Vector AliJet::Get3Momentum(Float_t scale) const |
d88f97cc | 529 | { |
530 | // Return the the total jet 3-momentum | |
25eefd00 | 531 | // By default the components of the 3-momentum are returned in the units |
532 | // as they were stored in the jet structure. | |
533 | // However, the user can select a different momentum unit scale for the | |
534 | // components by specification of the scale parameter. | |
535 | // The convention is that scale=1 corresponds to GeV/c, so specification | |
536 | // of scale=0.001 will provide the 3-momentum in MeV/c. | |
537 | ||
d88f97cc | 538 | Ali3Vector p=Get3Vector(); |
25eefd00 | 539 | if (scale>0) p*=fEscale/scale; |
d88f97cc | 540 | return p; |
541 | } | |
542 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 543 | Double_t AliJet::GetInvmass(Float_t scale) |
d88f97cc | 544 | { |
25eefd00 | 545 | // Return the invariant mass of the jet. |
546 | // By default the mass is returned in the units as it was stored in the jet | |
547 | // structure. However, the user can select a different mass unit scale by | |
548 | // specification of the scale parameter. | |
549 | // The convention is that scale=1 corresponds to GeV/c**2, so specification | |
550 | // of scale=0.001 will provide the invariant mass in MeV/c**2. | |
551 | // The error can be obtained by invoking GetResultError() after | |
552 | // invokation of GetInvmass(). | |
553 | ||
554 | Double_t inv=Dot(*this); | |
555 | Double_t dinv=GetResultError(); | |
556 | Double_t dm=0; | |
557 | if (inv >= 0) | |
d88f97cc | 558 | { |
25eefd00 | 559 | Double_t m=sqrt(inv); |
560 | if (m) dm=dinv/(2.*m); | |
561 | if (scale>0) | |
562 | { | |
563 | m*=fEscale/scale; | |
564 | dm*=fEscale/scale; | |
565 | } | |
566 | fDresult=dm; | |
567 | return m; | |
d88f97cc | 568 | } |
569 | else | |
570 | { | |
25eefd00 | 571 | fDresult=dm; |
d88f97cc | 572 | return 0; |
573 | } | |
574 | } | |
575 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 576 | Float_t AliJet::GetCharge() const |
d88f97cc | 577 | { |
578 | // Return the total charge of the jet | |
579 | return fQ; | |
580 | } | |
581 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 582 | AliTrack* AliJet::GetTrack(Int_t i) const |
d88f97cc | 583 | { |
584 | // Return the i-th track of this jet | |
ea0b5b7f | 585 | |
586 | if (!fTracks) return 0; | |
587 | ||
588 | if (i<=0 || i>fNtrk) | |
f34f4acb | 589 | { |
ea0b5b7f | 590 | cout << " *AliJet*::GetTrack* Invalid argument i : " << i |
591 | << " Ntrk = " << fNtrk << endl; | |
f34f4acb | 592 | return 0; |
593 | } | |
594 | else | |
595 | { | |
ea0b5b7f | 596 | return (AliTrack*)fTracks->At(i-1); |
f34f4acb | 597 | } |
d88f97cc | 598 | } |
599 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 600 | AliTrack* AliJet::GetIdTrack(Int_t id) const |
43bfa5be | 601 | { |
602 | // Return the track with user identifier "id" of this jet | |
4f368c8c | 603 | if (!fTracks) return 0; |
604 | ||
43bfa5be | 605 | AliTrack* tx=0; |
4f368c8c | 606 | for (Int_t i=0; i<fNtrk; i++) |
43bfa5be | 607 | { |
4f368c8c | 608 | tx=(AliTrack*)fTracks->At(i); |
609 | if (id == tx->GetId()) return tx; | |
43bfa5be | 610 | } |
4f368c8c | 611 | return 0; // No matching id found |
43bfa5be | 612 | } |
613 | /////////////////////////////////////////////////////////////////////////// | |
ea0b5b7f | 614 | TObjArray* AliJet::GetTracks(Int_t idmode,Int_t chmode,Int_t pcode) |
615 | { | |
616 | // Provide references to user selected tracks based on the idmode, chmode | |
617 | // and pcode selections as specified by the user. | |
618 | // | |
619 | // The following selection combinations are available : | |
620 | // ---------------------------------------------------- | |
621 | // idmode = -1 ==> Select tracks with negative user identifier "id" | |
622 | // 0 ==> No selection on user identifier | |
623 | // 1 ==> Select tracks with positive user identifier "id" | |
624 | // | |
625 | // chmode = -1 ==> Select tracks with negative charge | |
626 | // 0 ==> Select neutral tracks | |
627 | // 1 ==> Select tracks with positive charge | |
628 | // 2 ==> No selection on charge | |
325b076c | 629 | // 3 ==> Select all charged tracks |
ea0b5b7f | 630 | // |
631 | // pcode = 0 ==> No selection on particle code | |
632 | // X ==> Select tracks with particle code +X or -X | |
633 | // This allows selection of both particles and anti-particles | |
634 | // in case of PDG particle codes. | |
635 | // Selection of either particles or anti-particles can be | |
636 | // obtained in combination with the "chmode" selector. | |
637 | // | |
638 | // Examples : | |
639 | // ---------- | |
640 | // idmode=-1 chmode=0 pcode=0 : Selection of all neutral tracks with negative id. | |
641 | // idmode=0 chmode=2 pcode=211 : Selection of all charged pions (PDG convention). | |
642 | // idmode=0 chmode=1 pcode=321 : Selection of all positive kaons (PDG convention). | |
643 | // | |
644 | // The default values are idmode=0 chmode=2 pcode=0 (i.e. no selections applied). | |
645 | // | |
646 | // Notes : | |
647 | // ------- | |
648 | // 1) In case the user has labeled simulated tracks with negative id and | |
649 | // reconstructed tracks with positive id, this memberfunction provides | |
650 | // easy access to either all simulated or reconstructed tracks. | |
651 | // 2) Subsequent invokations of this memberfunction with e.g. chmode=-1 and chmode=1 | |
652 | // provides a convenient way to investigate particle pairs with opposite charge | |
653 | // (e.g. for invariant mass analysis). | |
50e93041 | 654 | // 3) The selected track pointers are returned via a multi-purpose array, |
655 | // which will be overwritten by subsequent selections. | |
656 | // In case the selected track list is to be used amongst other selections, | |
657 | // the user is advised to store the selected track pointers in a local | |
658 | // TObjArray or TRefArray. | |
ea0b5b7f | 659 | |
660 | if (fSelected) | |
661 | { | |
662 | fSelected->Clear(); | |
663 | } | |
664 | else | |
665 | { | |
666 | fSelected=new TObjArray(); | |
667 | } | |
668 | ||
669 | if (!fTracks) return fSelected; | |
670 | ||
671 | AliTrack* tx=0; | |
672 | Int_t code=0; | |
673 | Int_t id=0; | |
674 | Float_t q=0; | |
675 | for (Int_t i=0; i<fNtrk; i++) | |
676 | { | |
677 | tx=(AliTrack*)fTracks->At(i); | |
678 | if (!tx) continue; | |
679 | ||
680 | code=tx->GetParticleCode(); | |
681 | if (pcode && abs(pcode)!=abs(code)) continue; | |
682 | ||
683 | id=tx->GetId(); | |
684 | if (idmode==-1 && id>=0) continue; | |
685 | if (idmode==1 && id<=0) continue; | |
686 | ||
687 | q=tx->GetCharge(); | |
688 | if (chmode==-1 && q>=0) continue; | |
689 | if (chmode==0 && fabs(q)>1e-10) continue; | |
690 | if (chmode==1 && q<=0) continue; | |
325b076c | 691 | if (chmode==3 && fabs(q)<1e-10) continue; |
ea0b5b7f | 692 | |
693 | fSelected->Add(tx); | |
694 | } | |
695 | ||
696 | return fSelected; | |
697 | } | |
698 | /////////////////////////////////////////////////////////////////////////// | |
50e93041 | 699 | TObjArray* AliJet::GetTracks(TString name) |
700 | { | |
701 | // Provide references to all tracks with the specified name. | |
702 | // | |
703 | // Notes : | |
704 | // ------- | |
705 | // 1) In case the user has labeled reconstructed tracks with the name of | |
706 | // the applied reconstruction algorithm, this memberfunction provides | |
707 | // easy access to all tracks reconstructed by a certain method. | |
708 | // 2) The selected track pointers are returned via a multi-purpose array, | |
709 | // which will be overwritten by subsequent selections. | |
710 | // In case the selected track list is to be used amongst other selections, | |
711 | // the user is advised to store the selected track pointers in a local | |
712 | // TObjArray or TRefArray. | |
713 | ||
714 | if (fSelected) | |
715 | { | |
716 | fSelected->Clear(); | |
717 | } | |
718 | else | |
719 | { | |
720 | fSelected=new TObjArray(); | |
721 | } | |
722 | ||
723 | if (!fTracks) return fSelected; | |
724 | ||
725 | AliTrack* tx=0; | |
726 | TString s; | |
727 | for (Int_t i=0; i<fNtrk; i++) | |
728 | { | |
729 | tx=(AliTrack*)fTracks->At(i); | |
730 | if (!tx) continue; | |
731 | ||
732 | s=tx->GetName(); | |
733 | if (s == name) fSelected->Add(tx); | |
734 | } | |
735 | ||
736 | return fSelected; | |
737 | } | |
738 | /////////////////////////////////////////////////////////////////////////// | |
30672a96 | 739 | void AliJet::RemoveTracks(TString name) |
740 | { | |
741 | // Remove all tracks with the specified name. | |
742 | // If name="*" all tracks will be removed. | |
743 | // | |
744 | // Note : | |
745 | // ------ | |
746 | // In case the user has labeled reconstructed tracks with the name of | |
747 | // the applied reconstruction algorithm, this memberfunction provides | |
748 | // easy removal of all tracks reconstructed by a certain method. | |
749 | ||
750 | if (!fTracks) return; | |
751 | ||
752 | AliTrack* tx=0; | |
753 | TString s; | |
754 | TObject* obj=0; | |
755 | for (Int_t i=0; i<fNtrk; i++) | |
756 | { | |
757 | tx=(AliTrack*)fTracks->At(i); | |
758 | if (!tx) continue; | |
759 | ||
760 | s=tx->GetName(); | |
761 | if (s==name || name=="*") | |
762 | { | |
763 | obj=fTracks->Remove(tx); | |
764 | if (obj && fTracks->IsOwner()) delete tx; | |
765 | } | |
766 | } | |
767 | fTracks->Compress(); | |
768 | fNtrk=fTracks->GetEntries(); | |
769 | } | |
770 | /////////////////////////////////////////////////////////////////////////// | |
771 | void AliJet::RemoveTracks(Int_t idmode,Int_t chmode,Int_t pcode) | |
772 | { | |
773 | // Remove user selected tracks based on the idmode, chmode and pcode | |
774 | // selections as specified by the user. | |
775 | // For defintions of these selections see the corresponding GetTracks() | |
776 | // memberfunction. | |
777 | ||
778 | if (!fTracks) return; | |
779 | ||
780 | TObjArray* arr=GetTracks(idmode,chmode,pcode); | |
781 | if (!arr) return; | |
782 | ||
783 | Int_t ntk=arr->GetEntries(); | |
784 | if (!ntk) return; | |
785 | ||
786 | AliTrack* tx=0; | |
787 | TObject* obj=0; | |
788 | for (Int_t i=0; i<ntk; i++) | |
789 | { | |
790 | tx=(AliTrack*)arr->At(i); | |
791 | if (!tx) continue; | |
792 | ||
793 | obj=fTracks->Remove(tx); | |
794 | if (obj && fTracks->IsOwner()) delete tx; | |
795 | } | |
796 | fTracks->Compress(); | |
797 | fNtrk=fTracks->GetEntries(); | |
798 | arr->Clear(); | |
799 | } | |
800 | /////////////////////////////////////////////////////////////////////////// | |
325b076c | 801 | void AliJet::ShowTracks(Int_t mode) |
ea0b5b7f | 802 | { |
803 | // Provide an overview of the available tracks. | |
804 | // The argument mode determines the amount of information as follows : | |
805 | // mode = 0 ==> Only printout of the number of tracks | |
806 | // 1 ==> Provide a listing with 1 line of info for each track | |
807 | // | |
808 | // The default is mode=1. | |
809 | // | |
810 | Int_t ntk=GetNtracks(); | |
811 | if (ntk) | |
812 | { | |
813 | if (!mode) | |
814 | { | |
815 | cout << " There are " << ntk << " tracks available." << endl; | |
816 | } | |
817 | else | |
818 | { | |
819 | cout << " The following " << ntk << " tracks are available :" << endl; | |
820 | for (Int_t i=1; i<=ntk; i++) | |
821 | { | |
822 | AliTrack* tx=GetTrack(i); | |
823 | if (tx) | |
824 | { | |
825 | const char* name=tx->GetName(); | |
826 | const char* title=tx->GetTitle(); | |
827 | cout << " Track : " << i; | |
828 | cout << " Id : " << tx->GetId(); | |
829 | cout << " Q : " << tx->GetCharge() << " m : " << tx->GetMass() << " p : " << tx->GetMomentum(); | |
830 | if (strlen(name)) cout << " Name : " << name; | |
831 | if (strlen(title)) cout << " Title : " << title; | |
832 | cout << endl; | |
833 | } | |
834 | } | |
835 | } | |
836 | } | |
837 | else | |
838 | { | |
839 | cout << " No tracks are present." << endl; | |
840 | } | |
841 | } | |
842 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 843 | Double_t AliJet::GetPt(Float_t scale) |
d071d629 | 844 | { |
25eefd00 | 845 | // Provide the transverse momentum value w.r.t. z-axis. |
846 | // By default the value is returned in the units as it was stored in the jet | |
847 | // structure. However, the user can select a different momentum unit scale by | |
848 | // specification of the scale parameter. | |
849 | // The convention is that scale=1 corresponds to GeV/c, so specification | |
850 | // of scale=0.001 will provide the transverse momentum in MeV/c. | |
d071d629 | 851 | // The error on the value can be obtained by GetResultError() |
852 | // after invokation of GetPt(). | |
853 | Ali3Vector v; | |
854 | v=GetVecTrans(); | |
855 | Double_t norm=v.GetNorm(); | |
856 | fDresult=v.GetResultError(); | |
25eefd00 | 857 | if (scale>0) |
858 | { | |
859 | norm*=fEscale/scale; | |
860 | fDresult*=fEscale/scale; | |
861 | } | |
d071d629 | 862 | |
863 | return norm; | |
864 | } | |
865 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 866 | Double_t AliJet::GetPl(Float_t scale) |
d071d629 | 867 | { |
25eefd00 | 868 | // Provide the longitudinal momentum value w.r.t. z-axis. |
869 | // By default the value is returned in the units as it was stored in the jet | |
870 | // structure. However, the user can select a different momentum unit scale by | |
871 | // specification of the scale parameter. | |
872 | // The convention is that scale=1 corresponds to GeV/c, so specification | |
873 | // of scale=0.001 will provide the longitudinal momentum in MeV/c. | |
8adaf597 | 874 | // Note : the returned value can also be negative. |
d071d629 | 875 | // The error on the value can be obtained by GetResultError() |
876 | // after invokation of GetPl(). | |
25eefd00 | 877 | |
d071d629 | 878 | Ali3Vector v; |
879 | v=GetVecLong(); | |
8adaf597 | 880 | |
881 | Double_t pl=v.GetNorm(); | |
d071d629 | 882 | fDresult=v.GetResultError(); |
883 | ||
8adaf597 | 884 | Double_t a[3]; |
885 | v.GetVector(a,"sph"); | |
886 | if (cos(a[1])<0) pl=-pl; | |
25eefd00 | 887 | if (scale>0) |
888 | { | |
889 | pl*=fEscale/scale; | |
890 | fDresult*=fEscale/scale; | |
891 | } | |
8adaf597 | 892 | |
893 | return pl; | |
d071d629 | 894 | } |
895 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 896 | Double_t AliJet::GetEt(Float_t scale) |
d071d629 | 897 | { |
25eefd00 | 898 | // Provide transverse energy value w.r.t. z-axis. |
899 | // By default the value is returned in the units as it was stored in the jet | |
900 | // structure. However, the user can select a different energy unit scale by | |
901 | // specification of the scale parameter. | |
902 | // The convention is that scale=1 corresponds to GeV, so specification | |
903 | // of scale=0.001 will provide the transverse energy in MeV. | |
d071d629 | 904 | // The error on the value can be obtained by GetResultError() |
905 | // after invokation of GetEt(). | |
25eefd00 | 906 | |
d071d629 | 907 | Double_t et=GetScaTrans(); |
25eefd00 | 908 | if (scale>0) |
909 | { | |
910 | et*=fEscale/scale; | |
911 | fDresult*=fEscale/scale; | |
912 | } | |
d071d629 | 913 | |
914 | return et; | |
915 | } | |
916 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 917 | Double_t AliJet::GetEl(Float_t scale) |
d071d629 | 918 | { |
25eefd00 | 919 | // Provide longitudinal energy value w.r.t. z-axis. |
920 | // By default the value is returned in the units as it was stored in the jet | |
921 | // structure. However, the user can select a different energy unit scale by | |
922 | // specification of the scale parameter. | |
923 | // The convention is that scale=1 corresponds to GeV, so specification | |
924 | // of scale=0.001 will provide the longitudinal energy in MeV. | |
8adaf597 | 925 | // Note : the returned value can also be negative. |
d071d629 | 926 | // The error on the value can be obtained by GetResultError() |
927 | // after invokation of GetEl(). | |
25eefd00 | 928 | |
d071d629 | 929 | Double_t el=GetScaLong(); |
25eefd00 | 930 | if (scale>0) |
931 | { | |
932 | el*=fEscale/scale; | |
933 | fDresult*=fEscale/scale; | |
934 | } | |
d071d629 | 935 | |
936 | return el; | |
937 | } | |
938 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 939 | Double_t AliJet::GetMt(Float_t scale) |
d071d629 | 940 | { |
941 | // Provide transverse mass value w.r.t. z-axis. | |
25eefd00 | 942 | // By default the value is returned in the units as it was stored in the jet |
943 | // structure. However, the user can select a different energy unit scale by | |
944 | // specification of the scale parameter. | |
945 | // The convention is that scale=1 corresponds to GeV, so specification | |
946 | // of scale=0.001 will provide the transverse mass in MeV. | |
d071d629 | 947 | // The error on the value can be obtained by GetResultError() |
948 | // after invokation of GetMt(). | |
949 | Double_t pt=GetPt(); | |
950 | Double_t dpt=GetResultError(); | |
951 | Double_t m=GetInvmass(); | |
952 | Double_t dm=GetResultError(); | |
953 | ||
954 | Double_t mt=sqrt(pt*pt+m*m); | |
955 | Double_t dmt2=0; | |
956 | if (mt) dmt2=(pow((pt*dpt),2)+pow((m*dm),2))/(mt*mt); | |
957 | ||
958 | fDresult=sqrt(dmt2); | |
25eefd00 | 959 | if (scale>0) |
960 | { | |
961 | mt*=fEscale/scale; | |
962 | fDresult*=fEscale/scale; | |
963 | } | |
d071d629 | 964 | return mt; |
965 | } | |
966 | /////////////////////////////////////////////////////////////////////////// | |
8adaf597 | 967 | Double_t AliJet::GetRapidity() |
968 | { | |
969 | // Provide rapidity value w.r.t. z-axis. | |
970 | // The error on the value can be obtained by GetResultError() | |
971 | // after invokation of GetRapidity(). | |
972 | // Note : Also GetPseudoRapidity() is available since this class is | |
973 | // derived from Ali4Vector. | |
974 | Double_t e=GetEnergy(); | |
975 | Double_t de=GetResultError(); | |
976 | Double_t pl=GetPl(); | |
977 | Double_t dpl=GetResultError(); | |
978 | Double_t sum=e+pl; | |
979 | Double_t dif=e-pl; | |
980 | ||
981 | Double_t y=9999,dy2=0; | |
982 | if (sum && dif) y=0.5*log(sum/dif); | |
983 | ||
984 | if (sum*dif) dy2=(1./(sum*dif))*(pow((pl*de),2)+pow((e*dpl),2)); | |
985 | ||
986 | fDresult=sqrt(dy2); | |
987 | return y; | |
988 | } | |
989 | /////////////////////////////////////////////////////////////////////////// | |
c1f25d1d | 990 | void AliJet::SetTrackCopy(Int_t j) |
991 | { | |
992 | // (De)activate the creation of private copies of the added tracks. | |
993 | // j=0 ==> No private copies are made; pointers of original tracks are stored. | |
994 | // j=1 ==> Private copies of the tracks are made and these pointers are stored. | |
995 | // | |
996 | // Note : Once the storage contains pointer(s) to AliTrack(s) one cannot | |
997 | // change the TrackCopy mode anymore. | |
998 | // To change the TrackCopy mode for an existing AliJet containing | |
999 | // tracks one first has to invoke Reset(). | |
1000 | if (!fTracks) | |
1001 | { | |
1002 | if (j==0 || j==1) | |
1003 | { | |
1004 | fTrackCopy=j; | |
1005 | } | |
1006 | else | |
1007 | { | |
1008 | cout << "*AliJet::SetTrackCopy* Invalid argument : " << j << endl; | |
1009 | } | |
1010 | } | |
1011 | else | |
1012 | { | |
1013 | cout << "*AliJet::SetTrackCopy* Storage already contained tracks." | |
1014 | << " ==> TrackCopy mode not changed." << endl; | |
1015 | } | |
1016 | } | |
1017 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1018 | Int_t AliJet::GetTrackCopy() const |
c1f25d1d | 1019 | { |
1020 | // Provide value of the TrackCopy mode. | |
1021 | // 0 ==> No private copies are made; pointers of original tracks are stored. | |
1022 | // 1 ==> Private copies of the tracks are made and these pointers are stored. | |
1023 | return fTrackCopy; | |
1024 | } | |
1025 | /////////////////////////////////////////////////////////////////////////// | |
43bfa5be | 1026 | void AliJet::SetId(Int_t id) |
1027 | { | |
1028 | // Set a user defined identifier for this jet. | |
1029 | fUserId=id; | |
1030 | } | |
1031 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1032 | Int_t AliJet::GetId() const |
43bfa5be | 1033 | { |
1034 | // Provide the user defined identifier of this jet. | |
1035 | return fUserId; | |
1036 | } | |
1037 | /////////////////////////////////////////////////////////////////////////// | |
413d0114 | 1038 | void AliJet::SetReferencePoint(AliPosition& p) |
1039 | { | |
1040 | // Store the position of the jet reference-point. | |
1041 | // The reference-point of a jet provides a means to define a generic | |
1042 | // space-time location for the jet as a whole. | |
1043 | // This doesn't have to be necessarily the location where all the constituent | |
1044 | // tracks originate (e.g. a bundle of parallel tracks doesn't have such | |
1045 | // a location). As such the meaning of this reference-point is different from | |
1046 | // a normal vertex position and allows to provide complimentary information. | |
1047 | // This reference point is the preferable point to start e.g. extrapolations | |
1048 | // and investigate coincidences in space and/or time. | |
1049 | if (fRef) delete fRef; | |
1050 | fRef=new AliPositionObj(p); | |
1051 | } | |
1052 | /////////////////////////////////////////////////////////////////////////// | |
1053 | AliPosition* AliJet::GetReferencePoint() | |
1054 | { | |
1055 | // Provide the position of the jet reference-point. | |
1056 | // The reference-point of a jet provides a means to define a generic | |
1057 | // space-time location for the jet as a whole. | |
1058 | // This doesn't have to be necessarily the location where all the constituent | |
1059 | // tracks originate (e.g. a bundle of parallel tracks doesn't have such | |
1060 | // a location). As such the meaning of this reference-point is different from | |
1061 | // a normal vertex position and allows to provide complimentary information. | |
1062 | // This reference point is the preferable point to start e.g. extrapolations | |
1063 | // and investigate coincidences in space and/or time. | |
1064 | return fRef; | |
1065 | } | |
1066 | /////////////////////////////////////////////////////////////////////////// | |
e51b7d1a | 1067 | TObjArray* AliJet::SortTracks(Int_t mode,TObjArray* tracks) |
1068 | { | |
1069 | // Order the references to an array of tracks by looping over the input array "tracks" | |
1070 | // and checking the value of a certain observable. | |
1071 | // The ordered array is returned as a TObjArray. | |
1072 | // In case tracks=0 (default), the registered tracks of the current jet are used. | |
1073 | // Note that the original track array is not modified. | |
1074 | // Via the "mode" argument the user can specify the observable to be checked upon | |
1075 | // and specify whether sorting should be performed in decreasing order (mode<0) | |
1076 | // or in increasing order (mode>0). | |
1077 | // | |
1078 | // The convention for the observable selection is the following : | |
1079 | // mode : 1 ==> Number of signals associated to the track | |
1080 | // 2 ==> Track energy | |
1081 | // 3 ==> Track momentum | |
1082 | // 4 ==> Mass of the track | |
1083 | // 5 ==> Transverse momentum of the track | |
1084 | // 6 ==> Longitudinal momentum of the track | |
1085 | // 7 ==> Transverse energy of the track | |
1086 | // 8 ==> Longitudinal energy of the track | |
1087 | // 9 ==> Transverse mass of the track | |
1088 | // 10 ==> Track rapidity | |
1089 | // 11 ==> Pseudo-rapidity of the track | |
25eefd00 | 1090 | // 12 ==> Charge of the track |
1091 | // 13 ==> Probability of the track hypothesis | |
e51b7d1a | 1092 | // |
1093 | // The default is mode=-1. | |
1094 | // | |
1095 | // Note : This sorting routine uses a common area in memory, which is used | |
1096 | // by various other sorting facilities as well. | |
1097 | // This means that the resulting sorted TObjArray may be overwritten | |
1098 | // when another sorting is invoked. | |
1099 | // To retain the sorted list of pointers, the user is advised to copy | |
1100 | // the pointers contained in the returned TObjArray into a private | |
1101 | // TObjArray instance. | |
1102 | ||
1103 | if (fSelected) | |
1104 | { | |
1105 | delete fSelected; | |
1106 | fSelected=0; | |
1107 | } | |
1108 | ||
1109 | if (!tracks) tracks=fTracks; | |
1110 | ||
25eefd00 | 1111 | if (!mode || abs(mode)>13 || !tracks) return fSelected; |
e51b7d1a | 1112 | |
1113 | Int_t ntracks=tracks->GetEntries(); | |
1114 | if (!ntracks) | |
1115 | { | |
1116 | return fSelected; | |
1117 | } | |
1118 | else | |
1119 | { | |
1120 | fSelected=new TObjArray(ntracks); | |
1121 | } | |
1122 | ||
1123 | Double_t val1,val2; // Values of the observable to be tested upon | |
1124 | ||
1125 | Int_t nord=0; | |
1126 | for (Int_t i=0; i<ntracks; i++) // Loop over all tracks of the array | |
1127 | { | |
1128 | AliTrack* tx=(AliTrack*)tracks->At(i); | |
1129 | ||
1130 | if (!tx) continue; | |
1131 | ||
1132 | if (nord == 0) // store the first track at the first ordered position | |
1133 | { | |
1134 | nord++; | |
1135 | fSelected->AddAt(tx,nord-1); | |
1136 | continue; | |
1137 | } | |
1138 | ||
1139 | for (Int_t j=0; j<=nord; j++) // put track in the right ordered position | |
1140 | { | |
1141 | if (j == nord) // track has smallest (mode<0) or largest (mode>0) observable value seen so far | |
1142 | { | |
1143 | nord++; | |
1144 | fSelected->AddAt(tx,j); // add track at the end | |
1145 | break; // go for next track | |
1146 | } | |
64b63904 | 1147 | |
1148 | val1=0; | |
1149 | val2=0; | |
1150 | ||
e51b7d1a | 1151 | switch (abs(mode)) |
1152 | { | |
1153 | case 1: | |
1154 | val1=tx->GetNsignals(); | |
1155 | val2=((AliTrack*)fSelected->At(j))->GetNsignals(); | |
1156 | break; | |
1157 | case 2: | |
25eefd00 | 1158 | val1=tx->GetEnergy(1); |
1159 | val2=((AliTrack*)fSelected->At(j))->GetEnergy(1); | |
e51b7d1a | 1160 | break; |
1161 | case 3: | |
25eefd00 | 1162 | val1=tx->GetMomentum(1); |
1163 | val2=((AliTrack*)fSelected->At(j))->GetMomentum(1); | |
e51b7d1a | 1164 | break; |
1165 | case 4: | |
25eefd00 | 1166 | val1=tx->GetMass(1); |
1167 | val2=((AliTrack*)fSelected->At(j))->GetMass(1); | |
e51b7d1a | 1168 | break; |
1169 | case 5: | |
25eefd00 | 1170 | val1=tx->GetPt(1); |
1171 | val2=((AliTrack*)fSelected->At(j))->GetPt(1); | |
e51b7d1a | 1172 | break; |
1173 | case 6: | |
25eefd00 | 1174 | val1=tx->GetPl(1); |
1175 | val2=((AliTrack*)fSelected->At(j))->GetPl(1); | |
e51b7d1a | 1176 | break; |
1177 | case 7: | |
25eefd00 | 1178 | val1=tx->GetEt(1); |
1179 | val2=((AliTrack*)fSelected->At(j))->GetEt(1); | |
e51b7d1a | 1180 | break; |
1181 | case 8: | |
25eefd00 | 1182 | val1=tx->GetEl(1); |
1183 | val2=((AliTrack*)fSelected->At(j))->GetEl(1); | |
e51b7d1a | 1184 | break; |
1185 | case 9: | |
25eefd00 | 1186 | val1=tx->GetMt(1); |
1187 | val2=((AliTrack*)fSelected->At(j))->GetMt(1); | |
e51b7d1a | 1188 | break; |
1189 | case 10: | |
1190 | val1=tx->GetRapidity(); | |
1191 | val2=((AliTrack*)fSelected->At(j))->GetRapidity(); | |
1192 | break; | |
1193 | case 11: | |
1194 | val1=tx->GetPseudoRapidity(); | |
1195 | val2=((AliTrack*)fSelected->At(j))->GetPseudoRapidity(); | |
1196 | break; | |
25eefd00 | 1197 | case 12: |
1198 | val1=tx->GetCharge(); | |
1199 | val2=((AliTrack*)fSelected->At(j))->GetCharge(); | |
1200 | break; | |
1201 | case 13: | |
1202 | val1=tx->GetProb(); | |
1203 | val2=((AliTrack*)fSelected->At(j))->GetProb(); | |
1204 | break; | |
e51b7d1a | 1205 | } |
1206 | ||
f5b75967 | 1207 | if (mode<0 && val1 <= val2) continue; |
1208 | if (mode>0 && val1 >= val2) continue; | |
e51b7d1a | 1209 | |
1210 | nord++; | |
1211 | for (Int_t k=nord-1; k>j; k--) // create empty position | |
1212 | { | |
1213 | fSelected->AddAt(fSelected->At(k-1),k); | |
1214 | } | |
1215 | fSelected->AddAt(tx,j); // put track at empty position | |
1216 | break; // go for next track | |
1217 | } | |
1218 | } | |
1219 | return fSelected; | |
1220 | } | |
1221 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 1222 | Double_t AliJet::GetDistance(AliPosition* p,Float_t scale) |
9427ac75 | 1223 | { |
1224 | // Provide distance of the current jet to the position p. | |
1225 | // The error on the result can be obtained as usual by invoking | |
1226 | // GetResultError() afterwards. | |
1227 | // | |
25eefd00 | 1228 | // By default the distance will be provided in the metric unit scale of |
1229 | // the AliPosition p. | |
1230 | // However, the user can select a different metric unit scale by | |
1231 | // specification of the scale parameter. | |
1232 | // The convention is that scale=1 corresponds to meter, so specification | |
1233 | // of scale=0.01 will provide the distance in cm. | |
9427ac75 | 1234 | // As such it is possible to obtain a correctly computed distance even in case |
1235 | // the jet parameters have a different unit scale. | |
1236 | // However, it is recommended to work always with one single unit scale. | |
1237 | // | |
1238 | // Note : In case of incomplete information, a distance value of -1 is | |
1239 | // returned. | |
1240 | ||
1241 | Double_t dist=-1.; | |
1242 | fDresult=0.; | |
1243 | ||
1244 | if (!p) return dist; | |
1245 | ||
1246 | // Obtain a defined position on this jet | |
1247 | AliPosition* rx=fRef; | |
1248 | ||
1249 | if (!rx) return dist; | |
1250 | ||
1251 | Ali3Vector pj=Get3Momentum(); | |
1252 | ||
1253 | if (pj.GetNorm() <= 0.) return dist; | |
1254 | ||
1255 | AliTrack tj; | |
1256 | tj.Set3Momentum(pj); | |
1257 | tj.SetReferencePoint(*rx); | |
25eefd00 | 1258 | dist=tj.GetDistance(p,scale); |
9427ac75 | 1259 | fDresult=tj.GetResultError(); |
1260 | return dist; | |
1261 | } | |
1262 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 1263 | Double_t AliJet::GetDistance(AliTrack* t,Float_t scale) |
9427ac75 | 1264 | { |
1265 | // Provide distance of the current jet to the track t. | |
1266 | // The error on the result can be obtained as usual by invoking | |
1267 | // GetResultError() afterwards. | |
1268 | // | |
25eefd00 | 1269 | // By default the distance will be provided in the metric unit scale of |
1270 | // the current jet. | |
1271 | // However, the user can specify a required metric unit scale by specification | |
1272 | // of the scale parameter. | |
1273 | // The convention is that scale=1 corresponds to meter, so specification | |
1274 | // of scale=0.01 will provide the distance in cm. | |
9427ac75 | 1275 | // As such it is possible to obtain a correctly computed distance even in case |
1276 | // the jet and track parameters have a different unit scale. | |
1277 | // However, it is recommended to work always with one single unit scale. | |
1278 | // | |
1279 | // Note : In case of incomplete information, a distance value of -1 is | |
1280 | // returned. | |
1281 | ||
1282 | Double_t dist=-1.; | |
1283 | fDresult=0.; | |
1284 | ||
1285 | if (!t) return dist; | |
1286 | ||
1287 | // Obtain a defined position on this jet | |
1288 | AliPosition* rx=fRef; | |
1289 | ||
1290 | if (!rx) return dist; | |
1291 | ||
1292 | Ali3Vector pj=Get3Momentum(); | |
1293 | ||
1294 | if (pj.GetNorm() <= 0.) return dist; | |
1295 | ||
1296 | AliTrack tj; | |
1297 | tj.Set3Momentum(pj); | |
1298 | tj.SetReferencePoint(*rx); | |
25eefd00 | 1299 | dist=tj.GetDistance(t,scale); |
9427ac75 | 1300 | fDresult=tj.GetResultError(); |
1301 | return dist; | |
1302 | } | |
1303 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 1304 | Double_t AliJet::GetDistance(AliJet* j,Float_t scale) |
9427ac75 | 1305 | { |
1306 | // Provide distance of the current jet to the jet j. | |
1307 | // The error on the result can be obtained as usual by invoking | |
1308 | // GetResultError() afterwards. | |
1309 | // | |
25eefd00 | 1310 | // By default the distance will be provided in the metric unit scale of |
1311 | // the current jet. | |
1312 | // This implies that the results of j1.GetDistance(j2) and j2.GetDistance(j1) | |
1313 | // may be numerically different in case j1 and j2 have different metric units. | |
1314 | // However, the user can specify a required metric unit scale by specification | |
1315 | // of the scale parameter. | |
1316 | // The convention is that scale=1 corresponds to meter, so specification | |
1317 | // of scale=0.01 will provide the distance in cm. | |
9427ac75 | 1318 | // As such it is possible to obtain a correctly computed distance even in case |
25eefd00 | 1319 | // the jet parameters have a different unit scale. |
9427ac75 | 1320 | // However, it is recommended to work always with one single unit scale. |
1321 | // | |
1322 | // Note : In case of incomplete information, a distance value of -1 is | |
1323 | // returned. | |
1324 | ||
1325 | Double_t dist=-1.; | |
1326 | fDresult=0.; | |
1327 | ||
1328 | if (!j) return dist; | |
1329 | ||
1330 | // Obtain a defined position on jet j | |
1331 | AliPosition* rx=j->GetReferencePoint(); | |
1332 | ||
1333 | if (!rx) return dist; | |
1334 | ||
1335 | Ali3Vector pj=j->Get3Momentum(); | |
1336 | ||
1337 | if (pj.GetNorm() <= 0.) return dist; | |
1338 | ||
1339 | AliTrack tj; | |
1340 | tj.Set3Momentum(pj); | |
1341 | tj.SetReferencePoint(*rx); | |
25eefd00 | 1342 | dist=GetDistance(tj,scale); |
9427ac75 | 1343 | return dist; |
1344 | } | |
1345 | /////////////////////////////////////////////////////////////////////////// | |
25eefd00 | 1346 | Int_t AliJet::GetNsignals() const |
1347 | { | |
1348 | // Provide the number of signals associated to the jet tracks. | |
1349 | // Note : Multiple occurrences of the same signal are only counted once. | |
1350 | ||
1351 | if (fNtrk<1) return 0; | |
1352 | ||
1353 | TObjArray arr; | |
1354 | ||
1355 | Int_t n=0; | |
1356 | AliTrack* tx=0; | |
1357 | Int_t exists=0; | |
1358 | for (Int_t i=1; i<=fNtrk; i++) | |
1359 | { | |
1360 | tx=GetTrack(i); | |
1361 | for (Int_t j=1; j<=tx->GetNsignals(); j++) | |
1362 | { | |
1363 | AliSignal* sx=tx->GetSignal(j); | |
1364 | if (!sx) continue; | |
1365 | exists=0; | |
1366 | for (Int_t k=0; k<arr.GetEntries(); k++) | |
1367 | { | |
1368 | if (sx==(AliSignal*)arr.At(k)) | |
1369 | { | |
1370 | exists=1; | |
1371 | break; | |
1372 | } | |
1373 | } | |
1374 | if (!exists) arr.Add(sx); | |
1375 | } | |
1376 | } | |
1377 | n=arr.GetEntries(); | |
1378 | return n; | |
1379 | } | |
1380 | /////////////////////////////////////////////////////////////////////////// | |
1381 | void AliJet::SetEscale(Float_t scale) | |
1382 | { | |
1383 | // Indicate the energy/momentum scale as used by the user. | |
1384 | // The convention is that scale=1 indicates values in units | |
1385 | // of GeV, GeV/c or GeV/c**2. | |
1386 | // So, in case one decides to store values in units of MeV, MeV/c or MeV/c**2 | |
1387 | // the scale indicator should be set to scale=0.001. | |
1388 | // | |
1389 | // By default scale=1 is set in the constructor. | |
1390 | ||
1391 | if (scale>0) | |
1392 | { | |
1393 | fEscale=scale; | |
1394 | } | |
1395 | else | |
1396 | { | |
1397 | cout << " *AliJet::SetEscale* Invalid scale value : " << scale << endl; | |
1398 | } | |
1399 | } | |
1400 | /////////////////////////////////////////////////////////////////////////// | |
1401 | Float_t AliJet::GetEscale() const | |
1402 | { | |
1403 | // Provide the energy/momentum scale as used by the user. | |
1404 | // The convention is that scale=1 indicates values in units | |
1405 | // of GeV, GeV/c or GeV/c**2. | |
1406 | // So, a value of scale=0.001 indicates that energy/momentum values are | |
1407 | // stored in units of MeV, MeV/c or MeV/c**2. | |
1408 | return fEscale; | |
1409 | } | |
1410 | /////////////////////////////////////////////////////////////////////////// | |
261c0caf | 1411 | TObject* AliJet::Clone(const char* name) const |
5f25234b | 1412 | { |
1413 | // Make a deep copy of the current object and provide the pointer to the copy. | |
1414 | // This memberfunction enables automatic creation of new objects of the | |
1415 | // correct type depending on the object type, a feature which may be very useful | |
1416 | // for containers when adding objects in case the container owns the objects. | |
1417 | // This feature allows e.g. AliVertex to store either AliJet objects or | |
1418 | // objects derived from AliJet via the AddJet memberfunction, provided | |
1419 | // these derived classes also have a proper Clone memberfunction. | |
1420 | ||
1421 | AliJet* jet=new AliJet(*this); | |
1422 | if (name) | |
1423 | { | |
1424 | if (strlen(name)) jet->SetName(name); | |
1425 | } | |
1426 | return jet; | |
1427 | } | |
1428 | /////////////////////////////////////////////////////////////////////////// |