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ed551210 | 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 | ||
16 | /* $Id$ */ | |
17 | // | |
18 | // Realisations of the AliGenReader interface to be used with AliGenExFile. | |
19 | // NextEvent() loops over events | |
20 | // and NextParticle() loops over particles. | |
21 | // This implementation reads various StarLight output formats | |
22 | // Author: andreas.morsch@cern.ch | |
23 | ||
24 | #include <TVirtualMC.h> | |
25 | #include <TDatabasePDG.h> | |
26 | #include <TParticle.h> | |
27 | ||
28 | #include "AliGenReaderSL.h" | |
29 | #include "AliRun.h" | |
30 | ||
31 | ||
32 | ClassImp(AliGenReaderSL) | |
33 | ||
34 | ||
35 | AliGenReaderSL& AliGenReaderSL::operator=(const AliGenReaderSL& rhs) | |
36 | { | |
37 | // Assignment operator | |
38 | rhs.Copy(*this); | |
39 | return *this; | |
40 | } | |
41 | ||
42 | void AliGenReaderSL::Copy(TObject&) const | |
43 | { | |
44 | // | |
45 | // Copy | |
46 | // | |
47 | Fatal("Copy","Not implemented!\n"); | |
48 | } | |
49 | ||
50 | void AliGenReaderSL::Init() | |
51 | { | |
52 | // Initialisation | |
53 | if( !(fFile = fopen(fFileName,"r")) ) { | |
54 | printf("Couldn't open input file: %s \n", fFileName); | |
55 | } else { | |
56 | printf("File %s opened \n", fFileName); | |
57 | } | |
58 | ||
59 | ||
60 | } | |
61 | ||
62 | Int_t AliGenReaderSL::NextEvent() | |
63 | { | |
64 | // Read the next event | |
65 | ||
66 | if (fFormat == 0) { | |
67 | fNParticles = 4; | |
68 | return (fNParticles); | |
69 | } | |
70 | ||
71 | // Example | |
72 | // EVENT: 7 23 1 | |
73 | // GAMMAENERGIES: 27.6431 | |
74 | // VERTEX: 0 0 0 0 1 0 0 23 | |
75 | char linelabel[20]; | |
76 | int i1 = 0; | |
77 | int i2 = 0; | |
78 | int i3 = 0; | |
79 | ||
80 | ||
81 | double x1 = 0.0; | |
82 | double x2 = 0.0; | |
83 | double x3 = 0.0; | |
84 | double x4 = 0.0; | |
85 | ||
86 | int ntrk = 0; | |
87 | int nvtx = 0; | |
88 | // | |
89 | Float_t eGamma1, eGamma2; | |
90 | eGamma2 = 0.; | |
91 | ||
92 | // Event line | |
93 | fscanf(fFile,"%s %d %d %d ",linelabel, &i1, &ntrk, &i2); | |
94 | fNParticles = ntrk; | |
95 | // printf("Event line: %s i1 = %5d ntrk = %5d i2 = %5d \n", linelabel, i1, ntrk, i2); | |
96 | ||
97 | // Gamma line | |
98 | if (fFormat == 1) { | |
99 | fscanf(fFile, "%s %f ",linelabel, &eGamma1); | |
100 | } else if (fFormat == 2) { | |
101 | fscanf(fFile, "%s %f %f ",linelabel, &eGamma1, &eGamma2); | |
102 | } | |
103 | ||
104 | // printf("Gamma line: %s Egamma1 = %13.3f Egamma2 = %13.3f \n", linelabel, eGamma1, eGamma2); | |
105 | ||
106 | // Vertex line | |
107 | fscanf(fFile, "%s %lf %lf %lf %lf %d %d %d %d", | |
108 | linelabel, &x1, &x2, &x3, &x4, &i1, &i2, &i3, &nvtx); | |
109 | // printf("Vertex line: %s (x = %13.3f, y = %13.3f, z = %13.3f, t = %13.3f) i1 = %5d i2 = %5d i3 = %5d nvtx = %5d \n", | |
110 | // linelabel, x1, x2, x3, x4, i1, i2, i3, nvtx); | |
111 | if(ntrk != nvtx) printf("ERROR: ntrk = %5d nvtx = %5d \n", ntrk, nvtx); | |
112 | ||
113 | return (fNParticles); | |
114 | ||
115 | } | |
116 | ||
117 | TParticle* AliGenReaderSL::NextParticle() | |
118 | { | |
119 | // Read next particle | |
120 | ||
121 | Float_t px, py, pz; | |
122 | Int_t pdg; | |
123 | static TParticle particle; | |
124 | ||
125 | if (fFormat == 0) { | |
126 | Int_t ievent; | |
127 | Int_t ipart; | |
128 | fscanf(fFile, "%d %d %d %f %f %f ", &ievent, &ipart, &pdg, &px, &py, &pz); | |
129 | // printf("%5d %5d %5d %13.3f %13.3f %13.3f \n", ievent, ipart, pdg, px, py, pz); | |
130 | ||
131 | if (pdg == 8) pdg = 211; | |
132 | if (pdg == 9) pdg = -211; | |
133 | ||
134 | } else { | |
135 | char tracklabel[20]; | |
136 | int i1 = 0; | |
137 | int i2 = 0; | |
138 | int i3 = 0; | |
139 | int i4 = 0; | |
140 | fscanf(fFile,"%s %d %f %f %f %d %d %d %d", | |
141 | tracklabel, &i1, &px, &py, &pz, &i2, &i3, &i4, &pdg); | |
142 | // printf("Particle %5d %13.3f %13.3f %13.3f \n", pdg, px, py, pz); | |
143 | } | |
144 | ||
145 | Double_t mass = TDatabasePDG::Instance()->GetParticle(pdg)->Mass(); | |
146 | Float_t e = TMath::Sqrt(px * px + py * py + pz * pz + mass * mass); | |
147 | particle.SetMomentum(px, py, pz, e); | |
148 | particle.SetPdgCode(pdg); | |
149 | ||
150 | return &particle; | |
151 | } | |
152 | ||
153 | void AliGenReaderSL::RewindEvent() | |
154 | { | |
155 | // fFile->Rewind(); | |
156 | } |