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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: AliHijingRndm | |
3fe46493 | 20 | // Responsibilities: Interface to Root random number generator |
21 | // from Fortran (re-implements FINCTION RLU_HIJING | |
22 | // from HIJING) | |
23 | // Note: Since AliGenHijing belongs to another module (THijing) one cannot | |
24 | // pass the ponter to the generator via static variable | |
25 | // Collaborators: AliGenHijing class | |
26 | // Example: | |
27 | // | |
28 | // root> AliGenHijing *gener = new AliGenHijing(-1); | |
29 | // root> AliHijingRndm::SetHijingRandom(new TRandom3()); | |
30 | // root> AliHijingRndm::GetHijingRandom()->SetSeed(0); | |
31 | // root> cout<<"Seed "<< AliHijingRndm::GetHijingRandom()->GetSeed() <<endl; | |
7cdba479 | 32 | //----------------------------------------------------------------------------- |
33 | ||
3fe46493 | 34 | #include <TRandom.h> |
7cdba479 | 35 | |
36 | #include "AliHijingRndm.h" | |
37 | ||
38 | TRandom * AliHijingRndm::fgHijingRandom=0; | |
39 | ||
40 | ClassImp(AliHijingRndm) | |
41 | ||
7cdba479 | 42 | //_______________________________________________________________________ |
43 | void AliHijingRndm::SetHijingRandom(TRandom *ran) { | |
44 | // | |
45 | // Sets the pointer to an existing random numbers generator | |
46 | // | |
47 | if(ran) fgHijingRandom=ran; | |
48 | else fgHijingRandom=gRandom; | |
49 | } | |
50 | ||
51 | //_______________________________________________________________________ | |
52 | TRandom * AliHijingRndm::GetHijingRandom() { | |
53 | // | |
54 | // Retrieves the pointer to the random numbers generator | |
55 | // | |
56 | return fgHijingRandom; | |
57 | } | |
58 | ||
59 | //_______________________________________________________________________ | |
60 | # define rluget_hijing rluget_hijing_ | |
61 | # define rluset_hijing rluset_hijing_ | |
62 | # define rlu_hijing rlu_hijing_ | |
63 | ||
64 | extern "C" { | |
65 | void rluget_hijing(Int_t & /*lfn*/, Int_t & /*move*/) | |
66 | {printf("Dummy version of rluget_hijing reached\n");} | |
67 | ||
68 | void rluset_hijing(Int_t & /*lfn*/, Int_t & /*move*/) | |
69 | {printf("Dummy version of rluset_hijing reached\n");} | |
70 | ||
0ce61fd0 | 71 | Float_t rlu_hijing(Int_t & /*idum*/) |
7cdba479 | 72 | { |
73 | // Wrapper to FINCTION RLU_HIJING from HIJING | |
74 | // Uses static method to retrieve the pointer to the (C++) generator | |
75 | Double_t r; | |
76 | do r=AliHijingRndm::GetHijingRandom()->Rndm(); | |
77 | while(0 >= r || r >= 1); | |
0ce61fd0 | 78 | return (Float_t)r; |
7cdba479 | 79 | } |
80 | } |