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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 | ||
803d1ab0 | 16 | /* $Id$ */ |
675e9664 | 17 | |
18 | // Simple particle gun. | |
19 | // Momentum, phi and theta of the partice as well as the particle type can be set. | |
20 | // andreas.morsch@cern.ch | |
790bbabf | 21 | //Begin_Html |
22 | /* | |
23 | <img src="picts/AliGeneratorClass.gif"> | |
24 | </pre> | |
25 | <br clear=left> | |
26 | <font size=+2 color=red> | |
27 | <p>The responsible person for this module is | |
28 | <a href="mailto:andreas.morsch@cern.ch">Andreas Morsch</a>. | |
29 | </font> | |
30 | <pre> | |
31 | */ | |
32 | //End_Html | |
33 | // // | |
34 | /////////////////////////////////////////////////////////////////// | |
35 | ||
116cbefd | 36 | #include "TPDGCode.h" |
37 | ||
790bbabf | 38 | #include "AliGenFixed.h" |
39 | #include "AliRun.h" | |
790bbabf | 40 | |
41 | ClassImp(AliGenFixed) | |
42 | ||
43 | //_____________________________________________________________________________ | |
44 | AliGenFixed::AliGenFixed() | |
45 | :AliGenerator() | |
46 | { | |
47 | // | |
48 | // Default constructor | |
49 | // | |
50 | fIpart = 0; | |
f1f30542 | 51 | fExplicit = kFALSE; |
790bbabf | 52 | } |
53 | ||
54 | //_____________________________________________________________________________ | |
55 | AliGenFixed::AliGenFixed(Int_t npart) | |
56 | :AliGenerator(npart) | |
57 | { | |
58 | // | |
59 | // Standard constructor | |
60 | // | |
61 | fName="Fixed"; | |
62 | fTitle="Fixed Particle Generator"; | |
63 | // Generate Proton by default | |
64 | fIpart=kProton; | |
49c4fdc3 | 65 | fExplicit = kFALSE; |
790bbabf | 66 | } |
67 | ||
68 | //_____________________________________________________________________________ | |
69 | void AliGenFixed::Generate() | |
70 | { | |
71 | // | |
72 | // Generate one trigger | |
73 | // | |
74 | Float_t polar[3]= {0,0,0}; | |
f1f30542 | 75 | if(!fExplicit) { |
76 | fP[0] = fPMin*TMath::Cos(fPhiMin)*TMath::Sin(fThetaMin); | |
77 | fP[1] = fPMin*TMath::Sin(fPhiMin)*TMath::Sin(fThetaMin); | |
78 | fP[2] = fPMin*TMath::Cos(fThetaMin); | |
79 | } | |
790bbabf | 80 | Int_t i, nt; |
81 | // | |
f1f30542 | 82 | for(i=0;i<fNpart;i++) |
642f15cf | 83 | PushTrack(fTrackIt,-1,fIpart,fP,fOrigin.GetArray(),polar,0,kPPrimary,nt); |
790bbabf | 84 | } |
85 | ||
86 | //_____________________________________________________________________________ | |
198bb1c7 | 87 | void AliGenFixed::SetSigma(Float_t /*sx*/, Float_t /*sy*/, Float_t /*sz*/) |
790bbabf | 88 | { |
89 | // | |
90 | // Set the interaction point sigma | |
91 | // | |
92 | printf("Vertex smearing not implemented for fixed generator\n"); | |
93 | } |