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df725edf | 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 1.7 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 1.6 2000/12/21 16:24:06 morsch |
24 | Coding convention clean-up | |
25 | ||
675e9664 | 26 | Revision 1.5 2000/12/06 15:11:38 morsch |
27 | Correct double declared data members. | |
28 | ||
38f1bd58 | 29 | Revision 1.4 2000/11/30 07:12:50 alibrary |
30 | Introducing new Rndm and QA classes | |
31 | ||
65fb704d | 32 | Revision 1.3 2000/10/02 21:28:06 fca |
33 | Removal of useless dependecies via forward declarations | |
34 | ||
94de3818 | 35 | Revision 1.2 2000/06/09 20:37:51 morsch |
36 | All coding rule violations except RS3 corrected | |
37 | ||
f87cfe57 | 38 | Revision 1.1 2000/02/23 16:25:14 morsch |
39 | First commit of this file | |
40 | ||
df725edf | 41 | */ |
42 | ||
675e9664 | 43 | // As AliGenScan, generation of particles on a 3-dim grid |
44 | // but here double hits with a predefined distance are generated. | |
45 | // The second particle is generated at a constant distance but with random phi. | |
46 | // Generator can be used to evaluate double hit resolutions. | |
47 | // Author: andreas.morsch@cern.ch | |
48 | ||
df725edf | 49 | #include "AliGenDoubleScan.h" |
df725edf | 50 | #include "AliRun.h" |
f87cfe57 | 51 | |
df725edf | 52 | ClassImp(AliGenDoubleScan) |
53 | ||
54 | AliGenDoubleScan::AliGenDoubleScan() | |
55 | :AliGenScan(-1) | |
56 | { | |
57 | } | |
58 | ||
59 | AliGenDoubleScan::AliGenDoubleScan(Int_t npart) | |
60 | :AliGenScan(npart) | |
61 | { | |
f87cfe57 | 62 | // Constructor |
8b31bfac | 63 | fName = "Double Scan"; |
64 | fTitle= "Particle Generator for two correlated particles on a grid"; | |
df725edf | 65 | } |
66 | ||
67 | //____________________________________________________________ | |
68 | AliGenDoubleScan::~AliGenDoubleScan() | |
f87cfe57 | 69 | { |
70 | // Destructor | |
71 | } | |
df725edf | 72 | |
73 | //____________________________________________________________ | |
74 | void AliGenDoubleScan::Generate() | |
75 | { | |
f87cfe57 | 76 | // |
77 | // Generate one trigger | |
78 | // | |
df725edf | 79 | |
f87cfe57 | 80 | Float_t polar[3]= {0,0,0}; |
81 | // | |
82 | Float_t origin[3]; | |
83 | Float_t p[3]; | |
84 | Int_t nt; | |
85 | Float_t pmom, theta, phi; | |
86 | // | |
87 | Float_t random[6]; | |
88 | Float_t dx,dy,dz; | |
89 | ||
90 | // | |
91 | if (fNy > 0) { | |
38f1bd58 | 92 | dx=(fXCmax-fXCmin)/fNx; |
f87cfe57 | 93 | } else { |
94 | dx=1e10; | |
95 | } | |
df725edf | 96 | |
f87cfe57 | 97 | if (fNy > 0) { |
38f1bd58 | 98 | dy=(fYCmax-fYCmin)/fNy; |
f87cfe57 | 99 | } else { |
100 | dy=1e10; | |
101 | } | |
102 | ||
103 | if (fNz > 0) { | |
df725edf | 104 | dz=(fZmax-fZmin)/fNz; |
f87cfe57 | 105 | } else { |
106 | dz=1e10; | |
107 | } | |
108 | for (Int_t ix=0; ix<fNx; ix++) { | |
df725edf | 109 | for (Int_t iy=0; iy<fNy; iy++) { |
110 | for (Int_t iz=0; iz<fNz; iz++){ | |
65fb704d | 111 | Rndm(random,6); |
38f1bd58 | 112 | origin[0]=fXCmin+ix*dx+2*(random[0]-0.5)*fOsigma[0]; |
113 | origin[1]=fYCmin+iy*dy+2*(random[1]-0.5)*fOsigma[1]; | |
df725edf | 114 | origin[2]=fZmin+iz*dz+2*(random[2]-0.5)*fOsigma[2]; |
115 | pmom=fPMin+random[3]*(fPMax-fPMin); | |
116 | theta=fThetaMin+random[4]*(fThetaMax-fThetaMin); | |
117 | phi=fPhiMin+random[5]*(fPhiMax-fPhiMin); | |
118 | p[0] = pmom*TMath::Cos(phi)*TMath::Sin(theta); | |
119 | p[1] = pmom*TMath::Sin(phi)*TMath::Sin(theta); | |
120 | p[2] = pmom*TMath::Cos(theta); | |
a99cf51f | 121 | SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt); |
df725edf | 122 | // |
123 | // Generate 2nd particle at distance fDistance from the first | |
124 | // | |
65fb704d | 125 | Rndm(random,6); |
df725edf | 126 | Float_t phi2=2.*TMath::Pi()*random[0]; |
127 | Float_t dx =fDistance*TMath::Sin(phi2); | |
128 | Float_t dy =fDistance*TMath::Cos(phi2); | |
129 | origin[0]=origin[0]+dx; | |
130 | origin[1]=origin[1]+dy; | |
131 | pmom=fPMin+random[1]*(fPMax-fPMin); | |
132 | theta=fThetaMin+random[2]*(fThetaMax-fThetaMin); | |
133 | phi=fPhiMin+random[3]*(fPhiMax-fPhiMin); | |
134 | p[0] = pmom*TMath::Cos(phi)*TMath::Sin(theta); | |
135 | p[1] = pmom*TMath::Sin(phi)*TMath::Sin(theta); | |
136 | p[2] = pmom*TMath::Cos(theta); | |
a99cf51f | 137 | SetTrack(fTrackIt,-1,fIpart,p,origin,polar,0,kPPrimary,nt); |
df725edf | 138 | } |
139 | } | |
140 | } | |
141 | } | |
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