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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 | ||
25454878 | 16 | /* $Id$ */ |
675e9664 | 17 | |
a48e3376 | 18 | // Event generator that using an instance of type AliGenReader |
25454878 | 19 | // reads particles from a file and applies cuts. |
20 | // Example: In your Config.C you can include the following lines | |
4f23c932 | 21 | // AliGenExtFile *gener = new AliGenExtFile(-1); |
25454878 | 22 | // gener->SetMomentumRange(0,999); |
23 | // gener->SetPhiRange(-180.,180.); | |
24 | // gener->SetThetaRange(0,180); | |
25 | // gener->SetYRange(-999,999); | |
26 | // AliGenReaderTreeK * reader = new AliGenReaderTreeK(); | |
27 | // reader->SetFileName("myFileWithTreeK.root"); | |
28 | // gener->SetReader(reader); | |
29 | // gener->Init(); | |
30 | ||
675e9664 | 31 | |
159ec319 | 32 | #include <Riostream.h> |
084c1b4a | 33 | |
693caace | 34 | #include "AliGenExtFile.h" |
4f23c932 | 35 | #include "AliRunLoader.h" |
9ad9d6f5 | 36 | #include "AliHeader.h" |
37 | #include "AliGenEventHeader.h" | |
5c3fd7ea | 38 | |
a48e3376 | 39 | #include <TParticle.h> |
693caace | 40 | #include <TFile.h> |
a48e3376 | 41 | #include <TTree.h> |
42 | ||
5c3fd7ea | 43 | |
198bb1c7 | 44 | ClassImp(AliGenExtFile) |
380956c5 | 45 | |
46 | AliGenExtFile::AliGenExtFile() | |
47 | :AliGenMC() | |
693caace | 48 | { |
f87cfe57 | 49 | // Constructor |
693caace | 50 | // |
51 | // Read all particles | |
a48e3376 | 52 | fNpart =- 1; |
53 | fReader = 0; | |
693caace | 54 | } |
55 | ||
56 | AliGenExtFile::AliGenExtFile(Int_t npart) | |
380956c5 | 57 | :AliGenMC(npart) |
693caace | 58 | { |
f87cfe57 | 59 | // Constructor |
a48e3376 | 60 | fName = "ExtFile"; |
61 | fTitle = "Primaries from ext. File"; | |
62 | fReader = 0; | |
693caace | 63 | } |
64 | ||
198bb1c7 | 65 | AliGenExtFile::AliGenExtFile(const AliGenExtFile & ExtFile): |
66 | AliGenMC(ExtFile) | |
f87cfe57 | 67 | { |
198bb1c7 | 68 | // Copy constructor |
69 | ExtFile.Copy(*this); | |
f87cfe57 | 70 | } |
693caace | 71 | //____________________________________________________________ |
72 | AliGenExtFile::~AliGenExtFile() | |
73 | { | |
f87cfe57 | 74 | // Destructor |
a48e3376 | 75 | delete fReader; |
693caace | 76 | } |
77 | ||
a48e3376 | 78 | //___________________________________________________________ |
79 | void AliGenExtFile::Init() | |
693caace | 80 | { |
a48e3376 | 81 | // Initialize |
82 | if (fReader) fReader->Init(); | |
693caace | 83 | } |
84 | ||
a48e3376 | 85 | |
693caace | 86 | void AliGenExtFile::Generate() |
87 | { | |
f87cfe57 | 88 | // Generate particles |
693caace | 89 | |
a48e3376 | 90 | Float_t polar[3] = {0,0,0}; |
693caace | 91 | // |
a48e3376 | 92 | Float_t origin[3] = {0,0,0}; |
693caace | 93 | Float_t p[3]; |
94 | Float_t random[6]; | |
88cb7938 | 95 | Int_t i = 0, j, nt; |
693caace | 96 | // |
4f23c932 | 97 | // |
98 | if (fVertexSmear == kPerEvent) Vertex(); | |
693caace | 99 | |
380956c5 | 100 | while(1) { |
101 | Int_t nTracks = fReader->NextEvent(); | |
102 | if (nTracks == 0) { | |
103 | // printf("\n No more events !!! !\n"); | |
104 | Warning("AliGenExtFile::Generate","\nNo more events in external file!!!\nLast event may be empty or incomplete.\n"); | |
693caace | 105 | return; |
380956c5 | 106 | } |
107 | ||
9ad9d6f5 | 108 | // Generated event header |
109 | ||
110 | AliRunLoader * inRunLoader = fReader->GetRunLoader(); | |
111 | if(inRunLoader) { | |
112 | AliGenEventHeader * inHeader = inRunLoader->GetHeader()->GenEventHeader(); | |
113 | if (inHeader) { | |
114 | AliGenEventHeader * header = new AliGenEventHeader(*inHeader); | |
115 | AliRunLoader::GetRunLoader()->GetHeader()->SetGenEventHeader(header); | |
116 | } | |
117 | } | |
380956c5 | 118 | // |
119 | // Particle selection loop | |
120 | // | |
4f23c932 | 121 | // The selection criterium for the external file generator is as follows: |
380956c5 | 122 | // |
4f23c932 | 123 | // 1) All tracks are subject to the cuts defined by AliGenerator, i.e. |
380956c5 | 124 | // fThetaMin, fThetaMax, fPhiMin, fPhiMax, fPMin, fPMax, fPtMin, fPtMax, |
125 | // fYMin, fYMax. | |
126 | // If the particle does not satisfy these cuts, it is not put on the | |
127 | // stack. | |
128 | // 2) If fCutOnChild and some specific child is selected (e.g. if | |
129 | // fForceDecay==kSemiElectronic) the event is rejected if NOT EVEN ONE | |
130 | // child falls into the child-cuts. | |
88cb7938 | 131 | TParticle* iparticle = 0x0; |
132 | ||
380956c5 | 133 | if(fCutOnChild) { |
134 | // Count the selected children | |
135 | Int_t nSelected = 0; | |
4f23c932 | 136 | while ((iparticle=fReader->NextParticle()) ) { |
137 | Int_t kf = CheckPDGCode(iparticle->GetPdgCode()); | |
138 | kf = TMath::Abs(kf); | |
139 | if (ChildSelected(kf) && KinematicSelection(iparticle, 1)) { | |
140 | nSelected++; | |
141 | } | |
380956c5 | 142 | } |
143 | if (!nSelected) continue; // No particle selected: Go to next event | |
144 | fReader->RewindEvent(); | |
145 | } | |
a48e3376 | 146 | |
380956c5 | 147 | // |
148 | // Stack filling loop | |
149 | // | |
150 | for (i = 0; i < nTracks; i++) { | |
4f23c932 | 151 | TParticle* iparticle = fReader->NextParticle(); |
152 | Bool_t selected = KinematicSelection(iparticle,0); | |
153 | if (!selected) continue; | |
154 | p[0] = iparticle->Px(); | |
155 | p[1] = iparticle->Py(); | |
156 | p[2] = iparticle->Pz(); | |
157 | Int_t idpart = iparticle->GetPdgCode(); | |
158 | if(fVertexSmear==kPerTrack) | |
159 | { | |
160 | Rndm(random,6); | |
161 | for (j = 0; j < 3; j++) { | |
162 | origin[j]=fOrigin[j]+ | |
163 | fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
164 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
165 | } | |
380956c5 | 166 | } else { |
4f23c932 | 167 | origin[0] = fVertex[0] + iparticle->Vx(); |
168 | origin[1] = fVertex[1] + iparticle->Vy(); | |
169 | origin[2] = fVertex[2] + iparticle->Vz(); | |
380956c5 | 170 | } |
4f23c932 | 171 | |
172 | Int_t decayed = iparticle->GetFirstDaughter(); | |
173 | Int_t doTracking = fTrackIt && (decayed < 0) && (TMath::Abs(idpart) > 10) && selected; | |
174 | Int_t parent = iparticle->GetFirstMother(); | |
175 | ||
176 | PushTrack(doTracking,parent,idpart,p,origin,polar,0,kPPrimary,nt); | |
177 | KeepTrack(nt); | |
380956c5 | 178 | } // track loop |
4f23c932 | 179 | |
380956c5 | 180 | break; |
4f23c932 | 181 | |
380956c5 | 182 | } // event loop |
4f23c932 | 183 | |
380956c5 | 184 | SetHighWaterMark(nt); |
2c354237 | 185 | CdEventFile(); |
186 | } | |
380956c5 | 187 | |
2c354237 | 188 | void AliGenExtFile::CdEventFile() |
189 | { | |
190 | // CD back to the event file | |
4f23c932 | 191 | (AliRunLoader::GetRunLoader())->CdGAFile(); |
693caace | 192 | } |
193 | ||
194 | ||
f87cfe57 | 195 | AliGenExtFile& AliGenExtFile::operator=(const AliGenExtFile& rhs) |
196 | { | |
197 | // Assignment operator | |
198bb1c7 | 198 | rhs.Copy(*this); |
f87cfe57 | 199 | return *this; |
200 | } | |
198bb1c7 | 201 | |
f87cfe57 | 202 | |
dc1d768c | 203 | void AliGenExtFile::Copy(TObject&) const |
198bb1c7 | 204 | { |
205 | // | |
206 | // Copy | |
207 | // | |
208 | Fatal("Copy","Not implemented!\n"); | |
209 | } | |
693caace | 210 | |
211 | ||
212 | ||
213 | ||
214 | ||
215 | ||
216 |