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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 | $Log$ | |
8b31bfac | 18 | Revision 1.6 2001/07/27 17:09:35 morsch |
19 | Use local SetTrack, KeepTrack and SetHighWaterMark methods | |
20 | to delegate either to local stack or to stack owned by AliRun. | |
21 | (Piotr Skowronski, A.M.) | |
22 | ||
a99cf51f | 23 | Revision 1.5 2000/12/21 16:24:06 morsch |
24 | Coding convention clean-up | |
25 | ||
675e9664 | 26 | Revision 1.4 2000/11/30 07:12:49 alibrary |
27 | Introducing new Rndm and QA classes | |
28 | ||
65fb704d | 29 | Revision 1.3 2000/10/02 21:28:06 fca |
30 | Removal of useless dependecies via forward declarations | |
31 | ||
94de3818 | 32 | Revision 1.2 2000/07/11 18:24:55 fca |
33 | Coding convention corrections + few minor bug fixes | |
34 | ||
aee8290b | 35 | Revision 1.1 2000/06/09 20:22:58 morsch |
36 | Same class as previously in AliSimpleGen.cxx | |
37 | All coding rule violations except RS3 corrected (AM) | |
38 | ||
790bbabf | 39 | */ |
40 | ||
790bbabf | 41 | |
790bbabf | 42 | |
675e9664 | 43 | // Generator for particles in a preset |
44 | // kinematic range (flat distribution) | |
45 | // Note that for a given theta pt and p are not independent | |
46 | // Range for only one variable (pt or p) should be given. | |
47 | // | |
48 | // Comments and suggestions: andreas.morsch@cern.ch | |
790bbabf | 49 | // |
50 | //Begin_Html | |
51 | /* | |
52 | <img src="picts/AliGeneratorClass.gif"> | |
53 | </pre> | |
54 | <br clear=left> | |
55 | <font size=+2 color=red> | |
56 | <p>The responsible person for this module is | |
57 | <a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>. | |
58 | </font> | |
59 | <pre> | |
60 | */ | |
61 | //End_Html | |
62 | // // | |
63 | /////////////////////////////////////////////////////////////////// | |
64 | ||
65 | #include "AliGenBox.h" | |
66 | #include "AliRun.h" | |
67 | #include "AliConst.h" | |
68 | #include "AliPDG.h" | |
69 | ||
70 | ClassImp(AliGenBox) | |
71 | ||
72 | //_____________________________________________________________________________ | |
73 | AliGenBox::AliGenBox() | |
74 | :AliGenerator() | |
75 | { | |
76 | // | |
77 | // Default constructor | |
78 | // | |
79 | fIpart=0; | |
80 | } | |
81 | ||
82 | //_____________________________________________________________________________ | |
83 | AliGenBox::AliGenBox(Int_t npart) | |
84 | :AliGenerator(npart) | |
85 | { | |
86 | // | |
87 | // Standard constructor | |
88 | // | |
8b31bfac | 89 | fName = "Box"; |
90 | fTitle = "Box particle generator"; | |
790bbabf | 91 | // Generate Proton by default |
92 | fIpart=kProton; | |
93 | } | |
94 | ||
95 | //_____________________________________________________________________________ | |
96 | ||
97 | void AliGenBox::Generate() | |
98 | { | |
99 | // | |
100 | // Generate one trigger | |
101 | // | |
102 | ||
103 | Float_t polar[3]= {0,0,0}; | |
104 | // | |
105 | Float_t origin[3]; | |
106 | Float_t p[3]; | |
107 | Int_t i, j, nt; | |
108 | Double_t pmom, theta, phi, pt; | |
109 | // | |
110 | Float_t random[6]; | |
111 | // | |
112 | for (j=0;j<3;j++) origin[j]=fOrigin[j]; | |
aee8290b | 113 | if(fVertexSmear==kPerEvent) { |
65fb704d | 114 | Rndm(random,6); |
790bbabf | 115 | for (j=0;j<3;j++) { |
116 | origin[j]+=fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
117 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
118 | } | |
119 | } | |
120 | for(i=0;i<fNpart;i++) { | |
65fb704d | 121 | Rndm(random,3); |
790bbabf | 122 | theta=fThetaMin+random[0]*(fThetaMax-fThetaMin); |
123 | if(TestBit(kMomentumRange)) { | |
124 | pmom=fPMin+random[1]*(fPMax-fPMin); | |
125 | pt=pmom*TMath::Sin(theta); | |
126 | } else { | |
127 | ||
128 | pt=fPtMin+random[1]*(fPtMax-fPtMin); | |
129 | pmom=pt/TMath::Sin(theta); | |
130 | } | |
131 | phi=fPhiMin+random[2]*(fPhiMax-fPhiMin); | |
132 | p[0] = pt*TMath::Cos(phi); | |
133 | p[1] = pt*TMath::Sin(phi); | |
134 | p[2] = pmom*TMath::Cos(theta); | |
135 | ||
aee8290b | 136 | if(fVertexSmear==kPerTrack) { |
65fb704d | 137 | Rndm(random,6); |
790bbabf | 138 | for (j=0;j<3;j++) { |
139 | origin[j]=fOrigin[j]+fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())* | |
140 | TMath::Sqrt(-2*TMath::Log(random[2*j+1])); | |
141 | } | |
142 | } | |
a99cf51f | 143 | SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt); |
790bbabf | 144 | } |
145 | } | |
146 | ||
147 | //_____________________________________________________________________________ | |
148 | ||
149 | void AliGenBox::Init() | |
150 | { | |
151 | // Initialisation, check consistency of selected ranges | |
152 | if(TestBit(kPtRange)&&TestBit(kMomentumRange)) | |
153 | Fatal("Init","You should not set the momentum range and the pt range!\n"); | |
154 | if((!TestBit(kPtRange))&&(!TestBit(kMomentumRange))) | |
155 | Fatal("Init","You should set either the momentum or the pt range!\n"); | |
156 | } | |
157 |