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16bf9884 | 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 | ||
88cb7938 | 16 | /* $Id$ */ |
16bf9884 | 17 | |
18 | /////////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // Particle generator for the simplescopic TRD simulator // | |
21 | // // | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | #include <stdlib.h> | |
25 | ||
26 | #include <TRandom.h> | |
ee7e3ede | 27 | #include <TMCProcess.h> |
28 | ||
29 | #include "AliRun.h" | |
16bf9884 | 30 | |
31 | #include "AliTRDsimpleGen.h" | |
32 | #include "AliTRDsimpleMC.h" | |
5d12ce38 | 33 | #include "AliMC.h" |
16bf9884 | 34 | |
35 | ClassImp(AliTRDsimpleGen) | |
36 | ||
37 | //_____________________________________________________________________________ | |
38 | AliTRDsimpleGen::AliTRDsimpleGen():TObject() | |
39 | { | |
40 | // | |
41 | // AliTRDsimpleGen default constructor | |
42 | // | |
43 | ||
44 | fPdg = 211; | |
45 | fMomMin = 1.0; | |
46 | fMomMax = 1.0; | |
47 | ||
48 | } | |
49 | ||
50 | //_____________________________________________________________________________ | |
73ae7b59 | 51 | AliTRDsimpleGen::AliTRDsimpleGen(const AliTRDsimpleGen &g):TObject(g) |
16bf9884 | 52 | { |
53 | // | |
54 | // AliTRDsimpleGen copy constructor | |
55 | // | |
56 | ||
57 | ((AliTRDsimpleGen &) g).Copy(*this); | |
58 | ||
59 | } | |
60 | ||
61 | //_____________________________________________________________________________ | |
62 | AliTRDsimpleGen::~AliTRDsimpleGen() | |
63 | { | |
64 | // | |
65 | // AliTRDsimpleGen destructor | |
66 | // | |
67 | ||
68 | } | |
69 | ||
70 | //_____________________________________________________________________________ | |
71 | AliTRDsimpleGen &AliTRDsimpleGen::operator=(const AliTRDsimpleGen &g) | |
72 | { | |
73 | // | |
74 | // Assignment operator | |
75 | // | |
76 | ||
77 | if (this != &g) ((AliTRDsimpleGen &) g).Copy(*this); | |
78 | return *this; | |
79 | ||
80 | } | |
81 | ||
82 | //_____________________________________________________________________________ | |
83 | void AliTRDsimpleGen::Copy(TObject &g) | |
84 | { | |
85 | // | |
86 | // Copy function | |
87 | // | |
88 | ||
89 | ((AliTRDsimpleGen &) g).fPdg = fPdg; | |
90 | ((AliTRDsimpleGen &) g).fMomMin = fMomMin; | |
91 | ((AliTRDsimpleGen &) g).fMomMax = fMomMax; | |
92 | ||
93 | } | |
94 | ||
95 | //_____________________________________________________________________________ | |
96 | void AliTRDsimpleGen::NewParticle(Int_t ievent) | |
97 | { | |
98 | // | |
99 | // Generate a new particle and initialize the MC object | |
100 | // | |
101 | ||
102 | if (ievent == 0) { | |
103 | printf("\n"); | |
104 | printf("<AliTRDsimpleGen> Generate particles with PDG code %d\n",fPdg); | |
105 | if (fMomMax > fMomMin) { | |
106 | printf("<AliTRDsimpleGen> Momentum range = %4.2f - %4.2f GeV/c\n" | |
107 | ,fMomMin,fMomMax); | |
108 | } | |
109 | else { | |
110 | printf("<AliTRDsimpleGen> Fixed momentum = %4.2f GeV/c\n" | |
111 | ,fMomMax); | |
112 | } | |
113 | printf("\n"); | |
ee7e3ede | 114 | |
115 | // Add one dummy particle to the stack so that AddHit will work | |
116 | Float_t mom[3] = { 0.0 }; | |
117 | Float_t vtx[3] = { 0.0 }; | |
118 | Float_t pol[3] = { 0.0 }; | |
119 | Int_t ntr = 0; | |
5d12ce38 | 120 | gAlice->GetMCApp()->PushTrack(0,-1,fPdg,mom,vtx,pol,0.0,kPPrimary,ntr); |
ee7e3ede | 121 | |
16bf9884 | 122 | } |
123 | ||
124 | Double_t p = fMomMax; | |
125 | if (fMomMax > fMomMin) { | |
126 | p = (fMomMax - fMomMin) * gRandom->Rndm() + fMomMin; | |
127 | } | |
128 | ||
129 | Double_t px = p; | |
130 | Double_t py = 0.0; | |
131 | Double_t pz = 0.0; | |
132 | ||
133 | ((AliTRDsimpleMC *) gMC)->NewTrack(ievent,fPdg,px,py,pz); | |
134 | ||
135 | } |