New parameterisation for Psi and Upsilon (PbPb)
[u/mrichter/AliRoot.git] / RALICE / AliEvent.cxx
CommitLineData
d16062ac 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
84bb7c66 16// $Id: AliEvent.cxx,v 1.9 2003/01/09 16:06:35 nick Exp $
d16062ac 17
18///////////////////////////////////////////////////////////////////////////
19// Class AliEvent
20// Creation and investigation of an Alice physics event.
7849a8ab 21// An AliEvent can be constructed by adding AliTracks, Alivertices, AliJets
22// and/or AliCalorimeters.
d16062ac 23//
24// The basic functionality of AliEvent is identical to the one of AliVertex.
35044448 25// So, an AliEvent may be used as the primary vertex with some additional
26// functionality compared to AliVertex.
d16062ac 27//
7849a8ab 28// To provide maximal flexibility to the user, the two modes of track/jet/vertex
29// storage as described in AliJet and AliVertex can be used.
30// In addition an identical structure is provided for the storage of AliCalorimeter
31// objects, which can be selected by means of the memberfunction SetCalCopy().
32//
33// a) SetCalCopy(0) (which is the default).
34// Only the pointers of the 'added' calorimeters are stored.
35// This mode is typically used by making cal. studies based on a fixed set
36// of calorimeters which stays under user control or is kept on an external
37// file/tree.
38// In this way the AliEvent just represents a 'logical structure' for the
39// physics analysis.
35044448 40//
41// Note :
7849a8ab 42// Modifications made to the original calorimeters also affect the AliCalorimeter
43// objects which are stored in the AliEvent.
35044448 44//
7849a8ab 45// b) SetCalCopy(1).
46// Of every 'added' calorimeter a private copy will be made of which the pointer
47// will be stored.
48// In this way the AliEvent represents an entity on its own and modifications
49// made to the original calorimeters do not affect the AliCalorimeter objects
50// which are stored in the AliEvent.
51// This mode will allow 'adding' many different AliCalorimeters into an AliEvent by
52// creating only one AliCalorimeter instance in the main programme and using the
53// AliCalorimeter::Reset() and AliCalorimeter parameter setting memberfunctions.
54//
8e8e6c7f 55// See also the documentation provided for the memberfunction SetOwner().
56//
7849a8ab 57// Coding example to make an event consisting of a primary vertex,
58// 2 secondary vertices and a calorimeter.
d16062ac 59// --------------------------------------------------------------
7849a8ab 60// vp contains the tracks 1,2,3 and 4 (primary vertex)
61// v1 contains the tracks 5,6 and 7 (sec. vertex)
62// v2 contains the jets 1 and 2 (sec. vertex)
63//
7849a8ab 64// AliEvent evt;
65//
66// Specify the event object as the repository of all objects
67// for the event building and physics analysis.
68//
69// evt.SetCalCopy(1);
70// evt.SetTrackCopy(1);
71//
72// Fill the event structure with the basic objects
73//
35044448 74// AliCalorimeter emcal;
75// ...
76// ... // code to fill the calorimeter data
77// ...
78//
7849a8ab 79// evt.AddCalorimeter(emcal);
80//
35044448 81// AliTrack* tx=new AliTrack();
7849a8ab 82// for (Int_t i=0; i<10; i++)
83// {
d16062ac 84// ...
85// ... // code to fill the track data
86// ...
7849a8ab 87// evt.AddTrack(tx);
88// tx->Reset();
89// }
90//
35044448 91// if (tx)
92// {
93// delete tx;
94// tx=0;
95// }
96//
7849a8ab 97// Build the event structure (vertices, jets, ...) for physics analysis
98// based on the basic objects from the event repository.
d16062ac 99//
100// AliJet j1,j2;
7849a8ab 101// for (Int_t i=0; i<evt.GetNtracks(); i++)
102// {
103// tx=evt.GetTrack(i);
d16062ac 104// ...
105// ... // code to fill the jet data
106// ...
7849a8ab 107// }
d16062ac 108//
7849a8ab 109// AliVertex vp;
35044448 110// tx=evt.GetTrack(1);
7849a8ab 111// vp.AddTrack(tx);
35044448 112// tx=evt.GetTrack(2);
7849a8ab 113// vp.AddTrack(tx);
35044448 114// tx=evt.GetTrack(3);
7849a8ab 115// vp.AddTrack(tx);
35044448 116// tx=evt.GetTrack(4);
7849a8ab 117// vp.AddTrack(tx);
d16062ac 118//
7849a8ab 119// Float_t rp[3]={2.4,0.1,-8.5};
120// vp.SetPosition(rp,"car");
d16062ac 121//
7849a8ab 122// AliVertex v1;
35044448 123// tx=evt.GetTrack(5);
7849a8ab 124// v1.AddTrack(tx);
35044448 125// tx=evt.GetTrack(6);
7849a8ab 126// v1.AddTrack(tx);
35044448 127// tx=evt.GetTrack(7);
7849a8ab 128// v1.AddTrack(tx);
d16062ac 129//
130// Float_t r1[3]={1.6,-3.2,5.7};
131// v1.SetPosition(r1,"car");
132//
d16062ac 133//
7849a8ab 134// AliVertex v2;
135// v2.SetJetCopy(1);
d16062ac 136// v2.AddJet(j1);
137// v2.AddJet(j2);
138//
139// Float_t r2[3]={6.2,4.8,1.3};
140// v2.SetPosition(r2,"car");
141//
7849a8ab 142// Specify the vertices v1 and v2 as secondary vertices of the primary
143//
144// vp.SetVertexCopy(1);
145// vp.AddVertex(v1);
146// vp.AddVertex(v2);
147//
148// Enter the physics structures into the event
149// evt.SetVertexCopy(1);
150// evt.AddVertex(vp,0);
151//
152// The jets j1 and j2 are already available via sec. vertex v2,
153// but can be made available also from the event itself if desired.
154// AliJet* jx;
155// jx=v2.GetJet(1);
156// evt.AddJet(jx,0);
157// jx=v2.GetJet(2);
158// evt.AddJet(jx,0);
159//
84bb7c66 160// evt.Data("sph");
d16062ac 161// v1.ListAll();
162// v2.List("cyl");
163//
164// Float_t etot=evt.GetEnergy();
165// Ali3Vector ptot=evt.Get3Momentum();
166// Float_t loc[3];
167// evt.GetPosition(loc,"sph");
168// AliPosition r=v1.GetPosition();
84bb7c66 169// r.Data();
d16062ac 170// Int_t nt=v2.GetNtracks();
171// AliTrack* tv=v2.GetTrack(1); // Access track number 1 of Vertex v2
172//
d16062ac 173// evt.List();
174//
175// Int_t nv=evt.GetNvtx();
7849a8ab 176// AliVertex* vx=evt.GetVertex(1); // Access primary vertex
d16062ac 177// Float_t e=vx->GetEnergy();
178//
179// Float_t M=evt.GetInvmass();
180//
181// Reconstruct the event from scratch
182//
183// evt.Reset();
184// evt.SetNvmax(25); // Increase initial no. of sec. vertices
7849a8ab 185// ...
186// ... // code to create tracks etc...
187// ...
d16062ac 188//
189// Note : All quantities are in GeV, GeV/c or GeV/c**2
190//
191//--- Author: Nick van Eijndhoven 27-may-2001 UU-SAP Utrecht
84bb7c66 192//- Modified: NvE $Date: 2003/01/09 16:06:35 $ UU-SAP Utrecht
d16062ac 193///////////////////////////////////////////////////////////////////////////
194
195#include "AliEvent.h"
196
197ClassImp(AliEvent) // Class implementation to enable ROOT I/O
198
199AliEvent::AliEvent()
200{
201// Default constructor.
202// All variables initialised to default values.
203 fDaytime.Set();
204 fRun=0;
205 fEvent=0;
4575fcea 206 fAproj=0;
207 fZproj=0;
208 fPnucProj=0;
da17f667 209 fIdProj=0;
4575fcea 210 fAtarg=0;
211 fZtarg=0;
212 fPnucTarg=0;
da17f667 213 fIdTarg=0;
7849a8ab 214 fNcals=0;
215 fCalorimeters=0;
216 fCalCopy=0;
d16062ac 217}
218///////////////////////////////////////////////////////////////////////////
81508922 219AliEvent::AliEvent(Int_t n): AliVertex(n)
d16062ac 220{
221// Create an event to hold initially a maximum of n tracks
222// All variables initialised to default values
223 fDaytime.Set();
224 fRun=0;
225 fEvent=0;
4575fcea 226 fAproj=0;
227 fZproj=0;
228 fPnucProj=0;
da17f667 229 fIdProj=0;
4575fcea 230 fAtarg=0;
231 fZtarg=0;
232 fPnucTarg=0;
da17f667 233 fIdTarg=0;
7849a8ab 234 fNcals=0;
235 fCalorimeters=0;
236 fCalCopy=0;
d16062ac 237}
238///////////////////////////////////////////////////////////////////////////
239AliEvent::~AliEvent()
240{
241// Default destructor
7849a8ab 242 if (fCalorimeters)
243 {
7849a8ab 244 delete fCalorimeters;
245 fCalorimeters=0;
246 }
d16062ac 247}
248///////////////////////////////////////////////////////////////////////////
249void AliEvent::Reset()
250{
251// Reset all variables to default values
252// The max. number of tracks is set to the initial value again
253// The max. number of vertices is set to the default value again
8e8e6c7f 254// Note : The CalCopy mode is maintained as it was set by the user before.
d16062ac 255 fDaytime.Set();
256 fRun=0;
257 fEvent=0;
4575fcea 258 fAproj=0;
259 fZproj=0;
260 fPnucProj=0;
da17f667 261 fIdProj=0;
4575fcea 262 fAtarg=0;
263 fZtarg=0;
264 fPnucTarg=0;
da17f667 265 fIdTarg=0;
d16062ac 266
7849a8ab 267 fNcals=0;
268 if (fCalorimeters)
269 {
7849a8ab 270 delete fCalorimeters;
271 fCalorimeters=0;
272 }
273
d16062ac 274 AliVertex::Reset();
275}
276///////////////////////////////////////////////////////////////////////////
8e8e6c7f 277void AliEvent::SetOwner(Bool_t own)
278{
279// Set ownership of all added objects.
280// The default parameter is own=kTRUE.
281//
282// Invokation of this memberfunction also sets all the copy modes
283// (e.g. TrackCopy & co.) according to the value of own.
284//
285// This function (with own=kTRUE) is particularly useful when reading data
286// from a tree/file, since Reset() will then actually remove all the
287// added objects from memory irrespective of the copy mode settings
288// during the tree/file creation process. In this way it provides a nice way
289// of preventing possible memory leaks in the reading/analysis process.
290//
291// In addition this memberfunction can also be used as a shortcut to set all
292// copy modes in one go during a tree/file creation process.
293// However, in this case the user has to take care to only set/change the
294// ownership (and copy mode) for empty objects (e.g. newly created objects
295// or after invokation of the Reset() memberfunction) otherwise it will
296// very likely result in inconsistent destructor behaviour.
297
298 Int_t mode=1;
299 if (!own) mode=0;
300 if (fCalorimeters) fCalorimeters->SetOwner(own);
301 fCalCopy=mode;
302
303 AliVertex::SetOwner(own);
304}
305///////////////////////////////////////////////////////////////////////////
d16062ac 306void AliEvent::SetDayTime(TDatime& stamp)
307{
308// Set the date and time stamp for this event
309 fDaytime=stamp;
310}
311///////////////////////////////////////////////////////////////////////////
312void AliEvent::SetRunNumber(Int_t run)
313{
314// Set the run number for this event
315 fRun=run;
316}
317///////////////////////////////////////////////////////////////////////////
318void AliEvent::SetEventNumber(Int_t evt)
319{
320// Set the event number for this event
321 fEvent=evt;
322}
323///////////////////////////////////////////////////////////////////////////
324TDatime AliEvent::GetDayTime()
325{
326// Provide the date and time stamp for this event
327 return fDaytime;
328}
329///////////////////////////////////////////////////////////////////////////
330Int_t AliEvent::GetRunNumber()
331{
332// Provide the run number for this event
333 return fRun;
334}
335///////////////////////////////////////////////////////////////////////////
336Int_t AliEvent::GetEventNumber()
337{
338// Provide the event number for this event
339 return fEvent;
340}
341///////////////////////////////////////////////////////////////////////////
da17f667 342void AliEvent::SetProjectile(Int_t a,Int_t z,Double_t pnuc,Int_t id)
4575fcea 343{
da17f667 344// Set the projectile A, Z, momentum per nucleon and user defined particle ID.
345// By default the particle ID is set to zero.
4575fcea 346 fAproj=a;
347 fZproj=z;
348 fPnucProj=pnuc;
da17f667 349 fIdProj=id;
4575fcea 350}
351///////////////////////////////////////////////////////////////////////////
352Int_t AliEvent::GetProjectileA()
353{
354// Provide the projectile A value.
355 return fAproj;
356}
357///////////////////////////////////////////////////////////////////////////
358Int_t AliEvent::GetProjectileZ()
359{
360// Provide the projectile Z value.
361 return fZproj;
362}
363///////////////////////////////////////////////////////////////////////////
364Double_t AliEvent::GetProjectilePnuc()
365{
366// Provide the projectile momentum value per nucleon.
367 return fPnucProj;
368}
369///////////////////////////////////////////////////////////////////////////
da17f667 370Int_t AliEvent::GetProjectileId()
4575fcea 371{
da17f667 372// Provide the user defined particle ID of the projectile.
373 return fIdProj;
374}
375///////////////////////////////////////////////////////////////////////////
376void AliEvent::SetTarget(Int_t a,Int_t z,Double_t pnuc,Int_t id)
377{
378// Set the target A, Z, momentum per nucleon and user defined particle ID.
379// By default the particle ID is set to zero.
4575fcea 380 fAtarg=a;
381 fZtarg=z;
382 fPnucTarg=pnuc;
da17f667 383 fIdTarg=id;
4575fcea 384}
385///////////////////////////////////////////////////////////////////////////
386Int_t AliEvent::GetTargetA()
387{
388// Provide the target A value.
389 return fAtarg;
390}
391///////////////////////////////////////////////////////////////////////////
392Int_t AliEvent::GetTargetZ()
393{
394// Provide the target Z value.
395 return fZtarg;
396}
397///////////////////////////////////////////////////////////////////////////
398Double_t AliEvent::GetTargetPnuc()
399{
400// Provide the target momentum value per nucleon.
401 return fPnucTarg;
402}
403///////////////////////////////////////////////////////////////////////////
da17f667 404Int_t AliEvent::GetTargetId()
405{
406// Provide the user defined particle ID of the target.
407 return fIdTarg;
408}
409///////////////////////////////////////////////////////////////////////////
84bb7c66 410void AliEvent::HeaderData()
d16062ac 411{
412// Provide event header information
413 Int_t date=fDaytime.GetDate();
414 Int_t time=fDaytime.GetTime();
415
416 Int_t year=date/10000;
417 Int_t month=(date%10000)/100;
418 Int_t day=date%100;
419 Int_t hh=time/10000;
420 Int_t mm=(time%10000)/100;
421 Int_t ss=time%100;
422
423 char* c[12]={"jan","feb","mar","apr","may","jun",
424 "jul","aug","sep","oct","nov","dec"};
425
84bb7c66 426 cout << " *AliEvent::Data* Run : " << fRun << " Event : " << fEvent;
d16062ac 427 cout.fill('0');
428 cout << " Date : " << setw(2) << day << "-" << c[month-1] << "-" << year
35044448 429 << " Time : " << setw(2) << hh << ":" << setw(2) << mm << ":" << setw(2) << ss;
d16062ac 430 cout.fill(' ');
7849a8ab 431 cout << " Ncalorimeters : " << fNcals << endl;
d16062ac 432}
433///////////////////////////////////////////////////////////////////////////
84bb7c66 434void AliEvent::Data(TString f)
d16062ac 435{
436// Provide event information within the coordinate frame f
84bb7c66 437 HeaderData();
438 AliVertex::Data(f);
d16062ac 439}
440///////////////////////////////////////////////////////////////////////////
7849a8ab 441Int_t AliEvent::GetNcalorimeters()
442{
443// Provide the number of stored calorimeter systems
444 return fNcals;
445}
446///////////////////////////////////////////////////////////////////////////
447void AliEvent::AddCalorimeter(AliCalorimeter& c)
448{
449// Add a calorimeter system to the event
6516b62d 450 if (!fCalorimeters)
451 {
452 fCalorimeters=new TObjArray();
453 if (fCalCopy) fCalorimeters->SetOwner();
454 }
7849a8ab 455
456 // Add the calorimeter system to this event
457 fNcals++;
458 if (fCalCopy)
459 {
6516b62d 460 fCalorimeters->AddLast((AliCalorimeter*)c.Clone());
7849a8ab 461 }
462 else
463 {
464 fCalorimeters->AddLast(&c);
465 }
466}
467///////////////////////////////////////////////////////////////////////////
468void AliEvent::SetCalCopy(Int_t j)
469{
470// (De)activate the creation of private copies of the added calorimeters.
471// j=0 ==> No private copies are made; pointers of original cals. are stored.
472// j=1 ==> Private copies of the cals. are made and these pointers are stored.
473//
474// Note : Once the storage contains pointer(s) to AliCalorimeter(s) one cannot
475// change the CalCopy mode anymore.
476// To change the CalCopy mode for an existing AliEvent containing
477// calorimeters one first has to invoke Reset().
478 if (!fCalorimeters)
479 {
480 if (j==0 || j==1)
481 {
482 fCalCopy=j;
483 }
484 else
485 {
486 cout << "*AliEvent::SetCalCopy* Invalid argument : " << j << endl;
487 }
488 }
489 else
490 {
491 cout << "*AliEvent::SetCalCopy* Storage already contained calorimeters."
492 << " ==> CalCopy mode not changed." << endl;
493 }
494}
495///////////////////////////////////////////////////////////////////////////
496Int_t AliEvent::GetCalCopy()
497{
498// Provide value of the CalCopy mode.
499// 0 ==> No private copies are made; pointers of original cals. are stored.
500// 1 ==> Private copies of the cals. are made and these pointers are stored.
501 return fCalCopy;
502}
503///////////////////////////////////////////////////////////////////////////
504AliCalorimeter* AliEvent::GetCalorimeter(Int_t i)
505{
506// Return the i-th calorimeter of this event
507 if (!fCalorimeters)
508 {
509 cout << " *AliEvent::GetCalorimeter* No calorimeters present." << endl;
510 return 0;
511 }
512 else
513 {
514 if (i<=0 || i>fNcals)
515 {
516 cout << " *AliEvent::GetCalorimeter* Invalid argument i : " << i
517 << " Ncals = " << fNcals << endl;
518 return 0;
519 }
520 else
521 {
522 return (AliCalorimeter*)fCalorimeters->At(i-1);
523 }
524 }
525}
526///////////////////////////////////////////////////////////////////////////
527AliCalorimeter* AliEvent::GetCalorimeter(TString name)
528{
529// Return the calorimeter with name tag "name"
530 if (!fCalorimeters)
531 {
532 cout << " *AliEvent::GetCalorimeter* No calorimeters present." << endl;
533 return 0;
534 }
535 else
536 {
537 AliCalorimeter* cx;
538 TString s;
539 for (Int_t i=0; i<fNcals; i++)
540 {
541 cx=(AliCalorimeter*)fCalorimeters->At(i);
35044448 542 if (cx)
543 {
544 s=cx->GetName();
545 if (s == name) return cx;
546 }
7849a8ab 547 }
548
549 return 0; // No matching name found
550 }
551}
552///////////////////////////////////////////////////////////////////////////
d16062ac 553