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7cdba479 | 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 | /* $Id$ */ | |
17 | ||
18 | //----------------------------------------------------------------------------- | |
19 | // Class: AliPythiaRndm | |
20 | // Random Number Interface to Fortran (FINCTION PYR from PYTHIA) | |
21 | // Very similar to AliHijingRndm | |
22 | // Author: | |
23 | //----------------------------------------------------------------------------- | |
24 | ||
25 | #include <TError.h> | |
26 | ||
27 | #include "AliPythiaRndm.h" | |
28 | ||
29 | TRandom * AliPythiaRndm::fgPythiaRandom=0; | |
30 | ||
31 | ClassImp(AliPythiaRndm) | |
32 | ||
33 | //_______________________________________________________________________ | |
34 | AliPythiaRndm::AliPythiaRndm() | |
35 | { | |
36 | // | |
37 | // Default ctor | |
38 | // | |
39 | } | |
40 | ||
41 | //_______________________________________________________________________ | |
42 | AliPythiaRndm::AliPythiaRndm(const AliPythiaRndm& rn) | |
43 | { | |
44 | // | |
45 | // Copy constructor | |
46 | // | |
47 | rn.Copy(*this); | |
48 | } | |
49 | ||
50 | //_______________________________________________________________________ | |
51 | AliPythiaRndm::~AliPythiaRndm() { | |
52 | // | |
53 | // Destructor | |
54 | // | |
55 | fgPythiaRandom=0; | |
56 | } | |
57 | ||
58 | //_______________________________________________________________________ | |
59 | void AliPythiaRndm::Copy(AliPythiaRndm&) const | |
60 | { | |
61 | // | |
62 | // No copy is allowed for the object | |
63 | // | |
64 | ::Fatal("Copy","Not implemented\n"); | |
65 | } | |
66 | ||
67 | //_______________________________________________________________________ | |
68 | void AliPythiaRndm::SetPythiaRandom(TRandom *ran) { | |
69 | // | |
70 | // Sets the pointer to an existing random numbers generator | |
71 | // | |
72 | if(ran) fgPythiaRandom=ran; | |
73 | else fgPythiaRandom=gRandom; | |
74 | } | |
75 | ||
76 | //_______________________________________________________________________ | |
77 | TRandom * AliPythiaRndm::GetPythiaRandom() { | |
78 | // | |
79 | // Retrieves the pointer to the random numbers generator | |
80 | // | |
81 | return fgPythiaRandom; | |
82 | } | |
83 | ||
84 | //_______________________________________________________________________ | |
85 | #define pyr pyr_ | |
88cb7938 | 86 | #define pyrset pyrset_ |
87 | #define pyrget pyrget_ | |
7cdba479 | 88 | |
89 | extern "C" { | |
90 | Double_t pyr(Int_t*) | |
91 | { | |
92 | // Wrapper to FINCTION PYR from PYTHIA | |
93 | // Uses static method to retrieve the pointer to the (C++) generator | |
94 | Double_t r; | |
95 | do r=AliPythiaRndm::GetPythiaRandom()->Rndm(); | |
96 | while(0 >= r || r >= 1); | |
97 | return r; | |
98 | } | |
88cb7938 | 99 | void pyrset(Int_t*,Int_t*) {} |
100 | void pyrget(Int_t*,Int_t*) {} | |
7cdba479 | 101 | } |