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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 | ||
16 | /* | |
17 | $Log$ | |
f87cfe57 | 18 | Revision 1.5 1999/11/03 17:43:20 fca |
19 | New version from G.Martinez & A.Morsch | |
20 | ||
886b6f73 | 21 | Revision 1.4 1999/09/29 09:24:14 fca |
22 | Introduction of the Copyright and cvs Log | |
23 | ||
4c039060 | 24 | */ |
25 | ||
fe4da5cc | 26 | #include "AliGenHalo.h" |
fe4da5cc | 27 | #include "AliRun.h" |
c5970876 | 28 | #include "AliPDG.h" |
29 | ||
1578254f | 30 | #include <TDatabasePDG.h> |
fe4da5cc | 31 | #include <stdlib.h> |
f87cfe57 | 32 | |
fe4da5cc | 33 | ClassImp(AliGenHalo) |
34 | AliGenHalo::AliGenHalo() | |
35 | :AliGenerator(-1) | |
36 | { | |
f87cfe57 | 37 | // Constructor |
fe4da5cc | 38 | fName="Halo"; |
39 | fTitle="Halo from LHC Tunnel"; | |
40 | // Set the default file | |
41 | fFileName="~/marsip/marsip5.mu"; | |
42 | // | |
43 | // Read all particles | |
44 | fNpart=-1; | |
45 | fp=0; | |
46 | } | |
47 | ||
48 | AliGenHalo::AliGenHalo(Int_t npart) | |
49 | :AliGenerator(npart) | |
50 | { | |
f87cfe57 | 51 | // Constructor |
fe4da5cc | 52 | fName="Halo"; |
53 | fTitle="Halo from LHC Tunnel"; | |
54 | // Set the default file | |
55 | fFileName="~/marsip/marsip5.mu"; | |
56 | // | |
57 | // Read all particles | |
58 | fNpart=-1; | |
59 | fp=0; | |
60 | } | |
61 | ||
f87cfe57 | 62 | AliGenHalo::AliGenHalo(const AliGenHalo & Halo) |
63 | { | |
64 | // copy constructor | |
65 | } | |
66 | ||
67 | ||
fe4da5cc | 68 | //____________________________________________________________ |
69 | AliGenHalo::~AliGenHalo() | |
70 | { | |
f87cfe57 | 71 | // Destructor |
fe4da5cc | 72 | } |
73 | ||
74 | //____________________________________________________________ | |
75 | void AliGenHalo::Init() | |
f87cfe57 | 76 | { |
77 | // Initialisation | |
78 | } | |
fe4da5cc | 79 | |
80 | //____________________________________________________________ | |
81 | void AliGenHalo::Generate() | |
82 | { | |
f87cfe57 | 83 | // Generate from input file |
fe4da5cc | 84 | FILE *fp = fopen(fFileName,"r"); |
85 | if (fp) { | |
86 | printf("\n File %s opened for reading ! \n ", fFileName); | |
87 | } else { | |
88 | printf("\n Opening of file %s failed ! \n ", fFileName); | |
89 | } | |
90 | // | |
91 | // MARS particle codes | |
f87cfe57 | 92 | const Int_t kmars[12]={0,kProton,kNeutron,kPiPlus,kPiMinus,kKPlus,kKMinus, |
1578254f | 93 | kMuonPlus,kMuonMinus,kGamma,kElectron,kPositron}; |
fe4da5cc | 94 | |
95 | Float_t polar[3]= {0,0,0}; | |
96 | Float_t origin[3]; | |
97 | Float_t p[3], p0; | |
98 | Float_t ekin, wgt, tx, ty, tz, txy; | |
1578254f | 99 | Float_t amass; |
fe4da5cc | 100 | // |
1578254f | 101 | Int_t ipart, ncols, nt; |
fe4da5cc | 102 | |
103 | Int_t nread=0; | |
104 | origin[2]=2650; | |
105 | ||
106 | while(1) { | |
107 | ncols = fscanf(fp,"%i %f %f %f %f %f %f", | |
108 | &ipart, &ekin, &wgt, | |
109 | &origin[0], &origin[1], | |
110 | &tx, &ty); | |
111 | if (ncols < 0) break; | |
112 | nread++; | |
113 | if (fNpart !=-1 && nread > fNpart) break; | |
f87cfe57 | 114 | ipart = kmars[ipart]; |
1578254f | 115 | amass = TDatabasePDG::Instance()->GetParticle(ipart)->Mass(); |
fe4da5cc | 116 | p0=sqrt(ekin*ekin + 2.*amass); |
117 | ||
118 | txy=TMath::Sqrt(tx*tx+ty*ty); | |
119 | if (txy == 1.) { | |
120 | tz=0; | |
121 | } else { | |
122 | tz=-TMath::Sqrt(1.-txy); | |
123 | } | |
124 | p[0]=p0*tx; | |
125 | p[1]=p0*ty; | |
126 | p[2]=p0*tz; | |
127 | fParentWeight=wgt; | |
886b6f73 | 128 | gAlice->SetTrack(fTrackIt,-1,ipart,p,origin,polar,0,"Halo+",nt,fParentWeight); |
fe4da5cc | 129 | origin[2]=-origin[2]; |
130 | p[2]=-p[2]; | |
886b6f73 | 131 | gAlice->SetTrack(fTrackIt,-1,ipart,p,origin,polar,0,"Halo-",nt,fParentWeight); |
fe4da5cc | 132 | origin[2]=-origin[2]; |
133 | p[2]=-p[2]; | |
134 | } | |
135 | } | |
136 | ||
137 | ||
f87cfe57 | 138 | AliGenHalo& AliGenHalo::operator=(const AliGenHalo& rhs) |
139 | { | |
140 | // Assignment operator | |
141 | return *this; | |
142 | } | |
143 | ||
fe4da5cc | 144 | |
145 | ||
146 | ||
147 | ||
148 | ||
149 | ||
150 |