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