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1 | #include "AliHBTReaderKineTree.h" | |
2 | ||
3 | #include <Riostream.h> | |
4 | #include <TString.h> | |
5 | #include <TObjString.h> | |
6 | #include <TTree.h> | |
7 | #include <TFile.h> | |
8 | #include <TParticle.h> | |
9 | ||
10 | #include <AliRun.h> | |
11 | #include <AliRunLoader.h> | |
12 | #include <AliStack.h> | |
13 | #include <AliHeader.h> | |
14 | ||
15 | #include "AliHBTRun.h" | |
16 | #include "AliHBTEvent.h" | |
17 | #include "AliHBTParticle.h" | |
18 | #include "AliHBTParticleCut.h" | |
19 | ||
20 | ClassImp(AliHBTReaderKineTree) | |
21 | /**********************************************************/ | |
22 | const TString AliHBTReaderKineTree::fgkEventFolderName("HBTReaderKineTree"); | |
23 | ||
24 | AliHBTReaderKineTree::AliHBTReaderKineTree():fFileName("galice.root") | |
25 | { | |
26 | fParticles = new AliHBTRun(); | |
27 | fIsRead = kFALSE; | |
28 | } | |
29 | ||
30 | AliHBTReaderKineTree:: | |
31 | AliHBTReaderKineTree(TString& fname):fFileName(fname) | |
32 | { | |
33 | fParticles = new AliHBTRun(); | |
34 | fIsRead = kFALSE; | |
35 | } | |
36 | ||
37 | ||
38 | /**********************************************************/ | |
39 | AliHBTReaderKineTree:: | |
40 | AliHBTReaderKineTree(TObjArray* dirs,const Char_t *filename):AliHBTReader(dirs),fFileName(filename) | |
41 | { | |
42 | fParticles = new AliHBTRun(); | |
43 | fIsRead = kFALSE; | |
44 | } | |
45 | /**********************************************************/ | |
46 | ||
47 | AliHBTEvent* AliHBTReaderKineTree::GetParticleEvent(Int_t n) | |
48 | { | |
49 | //returns Nth event with simulated particles | |
50 | if (!fIsRead) | |
51 | if(Read(fParticles,0x0)) | |
52 | { | |
53 | Error("GetParticleEvent","Error in reading"); | |
54 | return 0x0; | |
55 | } | |
56 | ||
57 | return fParticles->GetEvent(n); | |
58 | } | |
59 | ||
60 | /********************************************************************/ | |
61 | ||
62 | Int_t AliHBTReaderKineTree::GetNumberOfPartEvents() | |
63 | { | |
64 | //returns number of events of particles | |
65 | if (!fIsRead) | |
66 | if(Read(fParticles,0x0)) | |
67 | { | |
68 | Error("GetNumberOfPartEvents","Error in reading"); | |
69 | return 0; | |
70 | } | |
71 | return fParticles->GetNumberOfEvents(); | |
72 | } | |
73 | ||
74 | ||
75 | /**********************************************************/ | |
76 | Int_t AliHBTReaderKineTree:: | |
77 | Read(AliHBTRun* particles, AliHBTRun *tracks) | |
78 | { | |
79 | cout<<"AliHBTReaderKineTree::Read()"<<endl; | |
80 | if (!particles) //check if an object is instatiated | |
81 | { | |
82 | Error("Read"," particles object must instatiated before passing it to the reader"); | |
83 | return 1; | |
84 | } | |
85 | particles->Reset();//clear runs == delete all old events | |
86 | ||
87 | Int_t Ndirs;//total number of directories specified in fDirs array | |
88 | Int_t Nevents; //number of events read in current directory | |
89 | Int_t totalNevents = 0; //total number of read events | |
90 | Int_t currentdir = 0; //number of current directory name is fDirs array | |
91 | ||
92 | if (fDirs) //if array with directories is supplied by user | |
93 | { | |
94 | Ndirs = fDirs->GetEntries(); //get the number if directories | |
95 | } | |
96 | else | |
97 | { | |
98 | Ndirs = 0; //if the array is not supplied read only from current directory | |
99 | } | |
100 | ||
101 | do //do{}while; is OK even if 0 dirs specified. In that case we try to read from "./" | |
102 | { | |
103 | cout<<"________________________________________________________\n"; | |
104 | AliRunLoader * rl = OpenFile(currentdir); | |
105 | ||
106 | if (rl == 0x0) | |
107 | { | |
108 | Error("Read","Cannot open session"); | |
109 | return 2; | |
110 | } | |
111 | rl->LoadHeader(); | |
112 | rl->LoadKinematics("READ"); | |
113 | Nevents = rl->GetNumberOfEvents(); | |
114 | ||
115 | for(Int_t currentEvent =0; currentEvent<Nevents;currentEvent++)//loop over all events | |
116 | { | |
117 | // cout<<"processing event "<<currentEvent<<" in current dir."<<endl; | |
118 | rl->GetEvent(currentEvent); | |
119 | AliStack* stack = rl->Stack(); | |
120 | if (!stack) | |
121 | { | |
122 | Error("Read","Can not get stack for event %d",currentEvent); | |
123 | continue; | |
124 | } | |
125 | Int_t npart = stack->GetNtrack(); | |
126 | Int_t nnn = 0; | |
127 | for (Int_t i = 0;i<npart; i++) | |
128 | { | |
129 | ||
130 | TParticle * p = stack->Particle(i); | |
131 | // if (p->GetFirstMother() >= 0) continue; do not apply with pythia etc | |
132 | ||
133 | if(Pass(p->GetPdgCode())) continue; //check if we are intersted with particles of this type | |
134 | //if not take next partilce | |
135 | ||
136 | AliHBTParticle* part = new AliHBTParticle(*p,i); | |
137 | if(Pass(part)) { delete part; continue;}//check if meets all criteria of any of our cuts | |
138 | //if it does not delete it and take next good track | |
139 | particles->AddParticle(totalNevents,part);//put track and particle on the run | |
140 | ||
141 | if ( (nnn%100) == 0) | |
142 | { | |
143 | cout<<nnn<<"\r"; | |
144 | fflush(0); | |
145 | } | |
146 | nnn++; | |
147 | } | |
148 | cout<<"Total read "<<nnn<<endl; | |
149 | totalNevents++; | |
150 | } | |
151 | delete rl; | |
152 | currentdir++; | |
153 | }while(currentdir < Ndirs);//end of loop over directories specified in fDirs Obj Array | |
154 | fIsRead = kTRUE; | |
155 | return 0; | |
156 | } | |
157 | ||
158 | AliRunLoader* AliHBTReaderKineTree::OpenFile(Int_t n) | |
159 | { | |
160 | //opens file with kine tree | |
161 | ||
162 | const TString& dirname = GetDirName(n); | |
163 | if (dirname == "") | |
164 | { | |
165 | Error("OpenFiles","Can not get directory name"); | |
166 | return 0x0; | |
167 | } | |
168 | TString filename = dirname +"/"+ fFileName; | |
169 | ||
170 | AliRunLoader *ret = AliRunLoader::Open(filename.Data(),fgkEventFolderName,"READ"); | |
171 | ||
172 | if ( ret == 0x0) | |
173 | { | |
174 | Error("OpenFiles","Can't open session from file %s",filename.Data()); | |
175 | return 0x0; | |
176 | } | |
177 | ||
178 | return ret; | |
179 | } |