blob: 0cfd8302ca25e635e6d94e5a658c654d4718d283 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file SCA_RandomNumberGenerator.h
* \ingroup gamelogic
* \brief Generate random numbers that can be used by other components. Each
* generator needs its own generator, so that the seed can be set
* on a per-generator basis.
*/
#ifndef __KX_RANDOMNUMBERGENERATOR
#define __KX_RANDOMNUMBERGENERATOR
#ifdef WITH_CXX_GUARDEDALLOC
#include "MEM_guardedalloc.h"
#endif
class SCA_RandomNumberGenerator {
/* reference counted for memleak */
int m_refcount;
/** base seed */
long m_seed;
/* A bit silly.. The N parameter is a define in the .cpp file */
/** the array for the state vector */
/* unsigned long mt[N]; */
unsigned long mt[624];
/** mti==N+1 means mt[KX_MT_VectorLenght] is not initialized */
int mti; /* initialised in the cpp file */
/** Calculate a start vector */
void SetStartVector(void);
public:
SCA_RandomNumberGenerator(long seed);
~SCA_RandomNumberGenerator();
unsigned long Draw();
float DrawFloat();
long GetSeed();
void SetSeed(long newseed);
SCA_RandomNumberGenerator* AddRef()
{
++m_refcount;
return this;
}
void Release()
{
if (--m_refcount == 0)
delete this;
}
#ifdef WITH_CXX_GUARDEDALLOC
public:
void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:SCA_RandomNumberGenerator"); }
void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
};
#endif /* __KX_RANDOMNUMBERGENERATOR */
|
