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