blob: 6577b3a053717d82d21401a4b7334085d54da514 (
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
|
/*
* vim: ts=4 sw=4 et tw=0 wm=0
*
* libcola - A library providing force-directed network layout using the
* stress-majorization method subject to separation constraints.
*
* Copyright (C) 2015 Monash University
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* See the file LICENSE.LGPL distributed with the library.
*
* This library 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.
*
* Author(s): Tim Dwyer
*/
#include "libcola/pseudorandom.h"
namespace cola {
PseudoRandom::PseudoRandom(double s)
: a(214013),
c(2531011),
m(2147483648),
range(32767),
seed(s)
{
}
double PseudoRandom::getNext(void)
{
seed = (seed * a + c) % m;
return (seed >> 16) / range;
}
double PseudoRandom::getNextBetween(double min, double max)
{
return min + getNext() * (max - min);
}
}
|
