Repository navigation
Expand file tree
/
Copy pathRNG.cpp
More file actions
79 lines (72 loc) · 1.68 KB
/
Copy pathRNG.cpp
File metadata and controls
79 lines (72 loc) · 1.68 KB
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
/*
* Copyright 2010 OpenXcom Developers.
*
* This file is part of OpenXcom.
*
* OpenXcom 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 3 of the License, or
* (at your option) any later version.
*
* OpenXcom 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 OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#include "RNG.h"
#include <cstdlib>
#include <ctime>
namespace OpenXcom
{
int RNG::_seed = 0;
/**
* Seeds the random generator with a new number.
* Defaults to the current time if none is set.
* @param seed New seed.
*/
void RNG::init(int seed)
{
if (seed == -1)
{
_seed = (int)time(NULL);
}
else
{
_seed = seed;
}
srand(_seed);
}
/**
* Returns the last seed used by the generator.
* @return Generator seed.
*/
int RNG::getSeed()
{
return _seed;
}
/**
* Generates a random integer number within a certain range.
* @param min Minimum number.
* @param max Maximum number.
* @return Generated number.
*/
int RNG::generate(int min, int max)
{
_seed = rand();
return (_seed % (max - min + 1) + min);
}
/**
* Generates a random decimal number within a certain range.
* @param min Minimum number.
* @param max Maximum number.
* @return Generated number.
*/
double RNG::generate(double min, double max)
{
_seed = rand();
return (_seed * (max - min) / RAND_MAX + min);
}
}