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790bbabf | 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 | $Log$ | |
a99cf51f | 18 | Revision 1.5 2000/12/21 16:24:06 morsch |
19 | Coding convention clean-up | |
20 | ||
675e9664 | 21 | Revision 1.4 2000/11/30 07:12:49 alibrary |
22 | Introducing new Rndm and QA classes | |
23 | ||
65fb704d | 24 | Revision 1.3 2000/10/02 21:28:06 fca |
25 | Removal of useless dependecies via forward declarations | |
26 | ||
94de3818 | 27 | Revision 1.2 2000/07/11 18:24:55 fca |
28 | Coding convention corrections + few minor bug fixes | |
29 | ||
aee8290b | 30 | Revision 1.1 2000/06/09 20:22:58 morsch |
31 | Same class as previously in AliSimpleGen.cxx | |
32 | All coding rule violations except RS3 corrected (AM) | |
33 | ||
790bbabf | 34 | */ |
35 | ||
790bbabf | 36 | |
790bbabf | 37 | |
675e9664 | 38 | // Generator for particles in a preset |
39 | // kinematic range (flat distribution) | |
40 | // Note that for a given theta pt and p are not independent | |
41 | // Range for only one variable (pt or p) should be given. | |
42 | // | |
43 | // Comments and suggestions: andreas.morsch@cern.ch | |
790bbabf | 44 | // |
45 | //Begin_Html | |
46 | /* | |
47 | <img src="picts/AliGeneratorClass.gif"> | |
48 | </pre> | |
49 | <br clear=left> | |
50 | <font size=+2 color=red> | |
51 | <p>The responsible person for this module is | |
52 | <a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>. | |
53 | </font> | |
54 | <pre> | |
55 | */ | |
56 | //End_Html | |
57 | // // | |
58 | /////////////////////////////////////////////////////////////////// | |
59 | ||
60 | #include "AliGenBox.h" | |
61 | #include "AliRun.h" | |
62 | #include "AliConst.h" | |
63 | #include "AliPDG.h" | |
64 | ||
65 | ClassImp(AliGenBox) | |
66 | ||
67 | //_____________________________________________________________________________ | |
68 | AliGenBox::AliGenBox() | |
69 | :AliGenerator() | |
70 | { | |
71 | // | |
72 | // Default constructor | |
73 | // | |
74 | fIpart=0; | |
75 | } | |
76 | ||
77 | //_____________________________________________________________________________ | |
78 | AliGenBox::AliGenBox(Int_t npart) | |
79 | :AliGenerator(npart) | |
80 | { | |
81 | // | |
82 | // Standard constructor | |
83 | // | |
84 | fName="Box"; | |
85 | fTitle="Box particle generator"; | |
86 | // Generate Proton by default | |
87 | fIpart=kProton; | |
88 | } | |
89 | ||
90 | //_____________________________________________________________________________ | |
91 | ||
92 | void AliGenBox::Generate() | |
93 | { | |
94 | // | |
95 | // Generate one trigger | |
96 | // | |
97 | ||
98 | Float_t polar[3]= {0,0,0}; | |
99 | // | |
100 | Float_t origin[3]; | |
101 | Float_t p[3]; | |
102 | Int_t i, j, nt; | |
103 | Double_t pmom, theta, phi, pt; | |
104 | // | |
105 | Float_t random[6]; | |
106 | // | |
107 | for (j=0;j<3;j++) origin[j]=fOrigin[j]; | |
aee8290b | 108 | if(fVertexSmear==kPerEvent) { |
65fb704d | 109 | Rndm(random,6); |
790bbabf | 110 | for (j=0;j<3;j++) { |
111 | origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
112 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
113 | } | |
114 | } | |
115 | for(i=0;i<fNpart;i++) { | |
65fb704d | 116 | Rndm(random,3); |
790bbabf | 117 | theta=fThetaMin+random[0]*(fThetaMax-fThetaMin); |
118 | if(TestBit(kMomentumRange)) { | |
119 | pmom=fPMin+random[1]*(fPMax-fPMin); | |
120 | pt=pmom*TMath::Sin(theta); | |
121 | } else { | |
122 | ||
123 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
124 | pmom=pt/TMath::Sin(theta); | |
125 | } | |
126 | phi=fPhiMin+random[2]*(fPhiMax-fPhiMin); | |
127 | p[0] = pt*TMath::Cos(phi); | |
128 | p[1] = pt*TMath::Sin(phi); | |
129 | p[2] = pmom*TMath::Cos(theta); | |
130 | ||
aee8290b | 131 | if(fVertexSmear==kPerTrack) { |
65fb704d | 132 | Rndm(random,6); |
790bbabf | 133 | for (j=0;j<3;j++) { |
134 | origin[j]=fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
135 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
136 | } | |
137 | } | |
a99cf51f | 138 | SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt); |
790bbabf | 139 | } |
140 | } | |
141 | ||
142 | //_____________________________________________________________________________ | |
143 | ||
144 | void AliGenBox::Init() | |
145 | { | |
146 | // Initialisation, check consistency of selected ranges | |
147 | if(TestBit(kPtRange)&&TestBit(kMomentumRange)) | |
148 | Fatal("Init","You should not set the momentum range and the pt range!\n"); | |
149 | if((!TestBit(kPtRange))&&(!TestBit(kMomentumRange))) | |
150 | Fatal("Init","You should set either the momentum or the pt range!\n"); | |
151 | } | |
152 |