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
|
/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* misc. */
#include "m_pd.h"
#include "s_stuff.h"
#include <math.h>
#include <stdio.h>
#include <string.h>
#ifdef UNISTD
#include <sys/types.h>
#include <sys/time.h>
#include <sys/times.h>
#include <sys/param.h>
#include <unistd.h>
#endif
#ifdef MSW
#include <wtypes.h>
#include <time.h>
#endif
static t_class *random_class;
typedef struct _random
{
t_object x_obj;
t_float x_f;
unsigned int x_state;
} t_random;
static int makeseed(void)
{
static unsigned int random_nextseed = 1489853723;
random_nextseed = random_nextseed * 435898247 + 938284287;
return (random_nextseed & 0x7fffffff);
}
static void *random_new(t_floatarg f)
{
t_random *x = (t_random *)pd_new(random_class);
x->x_f = f;
x->x_state = makeseed();
floatinlet_new(&x->x_obj, &x->x_f);
outlet_new(&x->x_obj, &s_float);
return (x);
}
static void random_bang(t_random *x)
{
int n = x->x_f, nval;
int range = (n < 1 ? 1 : n);
unsigned int randval = x->x_state;
x->x_state = randval = randval * 472940017 + 832416023;
nval = ((double)range) * ((double)randval)
* (1./4294967296.);
if (nval >= range) nval = range-1;
outlet_float(x->x_obj.ob_outlet, nval);
}
static void random_seed(t_random *x, t_float f, t_float glob)
{
x->x_state = f;
}
void random_setup(void)
{
random_class = class_new(gensym("random"), (t_newmethod)random_new, 0,
sizeof(t_random), 0, A_DEFFLOAT, 0);
class_addbang(random_class, random_bang);
class_addmethod(random_class, (t_method)random_seed,
gensym("seed"), A_FLOAT, 0);
}
|
