Case kNoDecayHeavy added. (N. Carrer)
[u/mrichter/AliRoot.git] / RALICE / AliEvent.cxx
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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
6516b62d 16// $Id: AliEvent.cxx,v 1.4 2001/07/06 09:30:59 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//
55// Coding example to make an event consisting of a primary vertex,
56// 2 secondary vertices and a calorimeter.
d16062ac 57// --------------------------------------------------------------
7849a8ab 58// vp contains the tracks 1,2,3 and 4 (primary vertex)
59// v1 contains the tracks 5,6 and 7 (sec. vertex)
60// v2 contains the jets 1 and 2 (sec. vertex)
61//
7849a8ab 62// AliEvent evt;
63//
64// Specify the event object as the repository of all objects
65// for the event building and physics analysis.
66//
67// evt.SetCalCopy(1);
68// evt.SetTrackCopy(1);
69//
70// Fill the event structure with the basic objects
71//
35044448 72// AliCalorimeter emcal;
73// ...
74// ... // code to fill the calorimeter data
75// ...
76//
7849a8ab 77// evt.AddCalorimeter(emcal);
78//
35044448 79// AliTrack* tx=new AliTrack();
7849a8ab 80// for (Int_t i=0; i<10; i++)
81// {
d16062ac 82// ...
83// ... // code to fill the track data
84// ...
7849a8ab 85// evt.AddTrack(tx);
86// tx->Reset();
87// }
88//
35044448 89// if (tx)
90// {
91// delete tx;
92// tx=0;
93// }
94//
7849a8ab 95// Build the event structure (vertices, jets, ...) for physics analysis
96// based on the basic objects from the event repository.
d16062ac 97//
98// AliJet j1,j2;
7849a8ab 99// for (Int_t i=0; i<evt.GetNtracks(); i++)
100// {
101// tx=evt.GetTrack(i);
d16062ac 102// ...
103// ... // code to fill the jet data
104// ...
7849a8ab 105// }
d16062ac 106//
7849a8ab 107// AliVertex vp;
35044448 108// tx=evt.GetTrack(1);
7849a8ab 109// vp.AddTrack(tx);
35044448 110// tx=evt.GetTrack(2);
7849a8ab 111// vp.AddTrack(tx);
35044448 112// tx=evt.GetTrack(3);
7849a8ab 113// vp.AddTrack(tx);
35044448 114// tx=evt.GetTrack(4);
7849a8ab 115// vp.AddTrack(tx);
d16062ac 116//
7849a8ab 117// Float_t rp[3]={2.4,0.1,-8.5};
118// vp.SetPosition(rp,"car");
d16062ac 119//
7849a8ab 120// AliVertex v1;
35044448 121// tx=evt.GetTrack(5);
7849a8ab 122// v1.AddTrack(tx);
35044448 123// tx=evt.GetTrack(6);
7849a8ab 124// v1.AddTrack(tx);
35044448 125// tx=evt.GetTrack(7);
7849a8ab 126// v1.AddTrack(tx);
d16062ac 127//
128// Float_t r1[3]={1.6,-3.2,5.7};
129// v1.SetPosition(r1,"car");
130//
d16062ac 131//
7849a8ab 132// AliVertex v2;
133// v2.SetJetCopy(1);
d16062ac 134// v2.AddJet(j1);
135// v2.AddJet(j2);
136//
137// Float_t r2[3]={6.2,4.8,1.3};
138// v2.SetPosition(r2,"car");
139//
7849a8ab 140// Specify the vertices v1 and v2 as secondary vertices of the primary
141//
142// vp.SetVertexCopy(1);
143// vp.AddVertex(v1);
144// vp.AddVertex(v2);
145//
146// Enter the physics structures into the event
147// evt.SetVertexCopy(1);
148// evt.AddVertex(vp,0);
149//
150// The jets j1 and j2 are already available via sec. vertex v2,
151// but can be made available also from the event itself if desired.
152// AliJet* jx;
153// jx=v2.GetJet(1);
154// evt.AddJet(jx,0);
155// jx=v2.GetJet(2);
156// evt.AddJet(jx,0);
157//
d16062ac 158// evt.Info("sph");
159// v1.ListAll();
160// v2.List("cyl");
161//
162// Float_t etot=evt.GetEnergy();
163// Ali3Vector ptot=evt.Get3Momentum();
164// Float_t loc[3];
165// evt.GetPosition(loc,"sph");
166// AliPosition r=v1.GetPosition();
167// r.Info();
168// Int_t nt=v2.GetNtracks();
169// AliTrack* tv=v2.GetTrack(1); // Access track number 1 of Vertex v2
170//
d16062ac 171// evt.List();
172//
173// Int_t nv=evt.GetNvtx();
7849a8ab 174// AliVertex* vx=evt.GetVertex(1); // Access primary vertex
d16062ac 175// Float_t e=vx->GetEnergy();
176//
177// Float_t M=evt.GetInvmass();
178//
179// Reconstruct the event from scratch
180//
181// evt.Reset();
182// evt.SetNvmax(25); // Increase initial no. of sec. vertices
7849a8ab 183// ...
184// ... // code to create tracks etc...
185// ...
d16062ac 186//
187// Note : All quantities are in GeV, GeV/c or GeV/c**2
188//
189//--- Author: Nick van Eijndhoven 27-may-2001 UU-SAP Utrecht
6516b62d 190//- Modified: NvE $Date: 2001/07/06 09:30:59 $ UU-SAP Utrecht
d16062ac 191///////////////////////////////////////////////////////////////////////////
192
193#include "AliEvent.h"
194
195ClassImp(AliEvent) // Class implementation to enable ROOT I/O
196
197AliEvent::AliEvent()
198{
199// Default constructor.
200// All variables initialised to default values.
201 fDaytime.Set();
202 fRun=0;
203 fEvent=0;
7849a8ab 204 fNcals=0;
205 fCalorimeters=0;
206 fCalCopy=0;
d16062ac 207}
208///////////////////////////////////////////////////////////////////////////
81508922 209AliEvent::AliEvent(Int_t n): AliVertex(n)
d16062ac 210{
211// Create an event to hold initially a maximum of n tracks
212// All variables initialised to default values
213 fDaytime.Set();
214 fRun=0;
215 fEvent=0;
7849a8ab 216 fNcals=0;
217 fCalorimeters=0;
218 fCalCopy=0;
d16062ac 219}
220///////////////////////////////////////////////////////////////////////////
221AliEvent::~AliEvent()
222{
223// Default destructor
7849a8ab 224 if (fCalorimeters)
225 {
7849a8ab 226 delete fCalorimeters;
227 fCalorimeters=0;
228 }
d16062ac 229}
230///////////////////////////////////////////////////////////////////////////
231void AliEvent::Reset()
232{
233// Reset all variables to default values
234// The max. number of tracks is set to the initial value again
235// The max. number of vertices is set to the default value again
236 fDaytime.Set();
237 fRun=0;
238 fEvent=0;
239
7849a8ab 240 fNcals=0;
241 if (fCalorimeters)
242 {
7849a8ab 243 delete fCalorimeters;
244 fCalorimeters=0;
245 }
246
d16062ac 247 AliVertex::Reset();
248}
249///////////////////////////////////////////////////////////////////////////
250void AliEvent::SetDayTime(TDatime& stamp)
251{
252// Set the date and time stamp for this event
253 fDaytime=stamp;
254}
255///////////////////////////////////////////////////////////////////////////
256void AliEvent::SetRunNumber(Int_t run)
257{
258// Set the run number for this event
259 fRun=run;
260}
261///////////////////////////////////////////////////////////////////////////
262void AliEvent::SetEventNumber(Int_t evt)
263{
264// Set the event number for this event
265 fEvent=evt;
266}
267///////////////////////////////////////////////////////////////////////////
268TDatime AliEvent::GetDayTime()
269{
270// Provide the date and time stamp for this event
271 return fDaytime;
272}
273///////////////////////////////////////////////////////////////////////////
274Int_t AliEvent::GetRunNumber()
275{
276// Provide the run number for this event
277 return fRun;
278}
279///////////////////////////////////////////////////////////////////////////
280Int_t AliEvent::GetEventNumber()
281{
282// Provide the event number for this event
283 return fEvent;
284}
285///////////////////////////////////////////////////////////////////////////
286void AliEvent::HeaderInfo()
287{
288// Provide event header information
289 Int_t date=fDaytime.GetDate();
290 Int_t time=fDaytime.GetTime();
291
292 Int_t year=date/10000;
293 Int_t month=(date%10000)/100;
294 Int_t day=date%100;
295 Int_t hh=time/10000;
296 Int_t mm=(time%10000)/100;
297 Int_t ss=time%100;
298
299 char* c[12]={"jan","feb","mar","apr","may","jun",
300 "jul","aug","sep","oct","nov","dec"};
301
302 cout << " *AliEvent::Info* Run : " << fRun << " Event : " << fEvent;
303 cout.fill('0');
304 cout << " Date : " << setw(2) << day << "-" << c[month-1] << "-" << year
35044448 305 << " Time : " << setw(2) << hh << ":" << setw(2) << mm << ":" << setw(2) << ss;
d16062ac 306 cout.fill(' ');
7849a8ab 307 cout << " Ncalorimeters : " << fNcals << endl;
d16062ac 308}
309///////////////////////////////////////////////////////////////////////////
310void AliEvent::Info(TString f)
311{
312// Provide event information within the coordinate frame f
313 HeaderInfo();
314 AliVertex::Info(f);
315}
316///////////////////////////////////////////////////////////////////////////
7849a8ab 317Int_t AliEvent::GetNcalorimeters()
318{
319// Provide the number of stored calorimeter systems
320 return fNcals;
321}
322///////////////////////////////////////////////////////////////////////////
323void AliEvent::AddCalorimeter(AliCalorimeter& c)
324{
325// Add a calorimeter system to the event
6516b62d 326 if (!fCalorimeters)
327 {
328 fCalorimeters=new TObjArray();
329 if (fCalCopy) fCalorimeters->SetOwner();
330 }
7849a8ab 331
332 // Add the calorimeter system to this event
333 fNcals++;
334 if (fCalCopy)
335 {
6516b62d 336 fCalorimeters->AddLast((AliCalorimeter*)c.Clone());
7849a8ab 337 }
338 else
339 {
340 fCalorimeters->AddLast(&c);
341 }
342}
343///////////////////////////////////////////////////////////////////////////
344void AliEvent::SetCalCopy(Int_t j)
345{
346// (De)activate the creation of private copies of the added calorimeters.
347// j=0 ==> No private copies are made; pointers of original cals. are stored.
348// j=1 ==> Private copies of the cals. are made and these pointers are stored.
349//
350// Note : Once the storage contains pointer(s) to AliCalorimeter(s) one cannot
351// change the CalCopy mode anymore.
352// To change the CalCopy mode for an existing AliEvent containing
353// calorimeters one first has to invoke Reset().
354 if (!fCalorimeters)
355 {
356 if (j==0 || j==1)
357 {
358 fCalCopy=j;
359 }
360 else
361 {
362 cout << "*AliEvent::SetCalCopy* Invalid argument : " << j << endl;
363 }
364 }
365 else
366 {
367 cout << "*AliEvent::SetCalCopy* Storage already contained calorimeters."
368 << " ==> CalCopy mode not changed." << endl;
369 }
370}
371///////////////////////////////////////////////////////////////////////////
372Int_t AliEvent::GetCalCopy()
373{
374// Provide value of the CalCopy mode.
375// 0 ==> No private copies are made; pointers of original cals. are stored.
376// 1 ==> Private copies of the cals. are made and these pointers are stored.
377 return fCalCopy;
378}
379///////////////////////////////////////////////////////////////////////////
380AliCalorimeter* AliEvent::GetCalorimeter(Int_t i)
381{
382// Return the i-th calorimeter of this event
383 if (!fCalorimeters)
384 {
385 cout << " *AliEvent::GetCalorimeter* No calorimeters present." << endl;
386 return 0;
387 }
388 else
389 {
390 if (i<=0 || i>fNcals)
391 {
392 cout << " *AliEvent::GetCalorimeter* Invalid argument i : " << i
393 << " Ncals = " << fNcals << endl;
394 return 0;
395 }
396 else
397 {
398 return (AliCalorimeter*)fCalorimeters->At(i-1);
399 }
400 }
401}
402///////////////////////////////////////////////////////////////////////////
403AliCalorimeter* AliEvent::GetCalorimeter(TString name)
404{
405// Return the calorimeter with name tag "name"
406 if (!fCalorimeters)
407 {
408 cout << " *AliEvent::GetCalorimeter* No calorimeters present." << endl;
409 return 0;
410 }
411 else
412 {
413 AliCalorimeter* cx;
414 TString s;
415 for (Int_t i=0; i<fNcals; i++)
416 {
417 cx=(AliCalorimeter*)fCalorimeters->At(i);
35044448 418 if (cx)
419 {
420 s=cx->GetName();
421 if (s == name) return cx;
422 }
7849a8ab 423 }
424
425 return 0; // No matching name found
426 }
427}
428///////////////////////////////////////////////////////////////////////////
d16062ac 429