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