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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
#include "m_pd.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
static t_class *ifsmusic_class;
/*
* An interated function system music example
*/
typedef struct _ifsmusic {
t_object x_obj;
t_int nr_notes;
t_int nr_functions;
// t_int melodylength;
t_float T[16];
t_float S[16];
t_float P[16];
t_int R[16];
t_int count;
t_float note[16];
t_atom notesout[16];
t_outlet *x_out;
} t_ifsmusic;
void nextSerie(t_ifsmusic *x) {
int i;
if (x->count == x->nr_notes) {
t_float ra = rand();
t_float r = ra/RAND_MAX;
int k = 0;
t_float noten[16];
x->count = 0;
while (r>x->P[k]) k++;
post("Selected function %d, r=%f",k,r);
for (i=1;i<x->nr_notes;i++) {
x->note[i] = ((x->note[i] - x->note[0])*x->S[k]) + x->note[0];
}
for (i=0;i<x->nr_notes;i++) {
x->note[i] = x->note[i] + x->T[k];
}
if (x->R[k] == -1) {
for (i=0;i<x->nr_notes;i++)
noten[x->nr_notes-1-i]=x->note[i];
for (i=0;i<x->nr_notes;i++)
x->note[i]=noten[i];
}
}
}
void ifsmusic_outputSerie(t_ifsmusic *x)
{
int i;
for (i=0;i< x->nr_notes;i++) {
//x->notesout[i] = x->note[i];
SETFLOAT(&x->notesout[i],x->note[i]);
}
outlet_list(x->x_out,&s_list, x->nr_notes, &x->notesout[0]);
x->count = x->nr_notes;
nextSerie(x);
}
void ifsmusic_bang(t_ifsmusic *x)
{
outlet_float(x->x_out,x->note[x->count]);
x->count++;
nextSerie(x);
}
void ifsmusic_setNotes(t_ifsmusic *x,t_symbol *s, int argc, t_atom *argv) {
int i;
x->nr_notes = argc;
post("%d new notes set!",x->nr_notes);
for (i=0;i<x->nr_notes;i++) {
x->note[i] = atom_getfloat(&argv[i]);
}
}
void ifsmusic_setFunctions(t_ifsmusic *x,t_symbol *s, int argc, t_atom *argv) {
int i;
float p = 0;
x->nr_functions = argc/4;
post("%d new function set!",x->nr_functions);
for (i=0;i<x->nr_functions;i++) {
x->S[i] = atom_getfloat(&argv[i*4]);
x->T[i] = atom_getfloat(&argv[i*4+1]);
// x->T2[i] = atom_getfloat(&argv[i*5+2]);
x->P[i] = p+atom_getfloat(&argv[i*4+3]);
x->R[i] = (t_int) atom_getfloat(&argv[i*4+2]);
p = x->P[i];
post("function %d: %f %f %d %f",i,x->S[i],x->T[i],x->R[i],x->P[i]);
}
if (p != 1.0) {
float scale = 1.0/p;
// post("%d new function set. Scale probabilities by %f",x->nr_functions,scale);
for (i=0;i<x->nr_functions;i++) {
x->P[i] = scale*x->P[i];
// startpost("p for %d: %f; ",i,x->P[i]);
}
}
}
void ifsmusic_initDummyNoteSequence(t_ifsmusic *x) {
x->nr_notes = 3;
x->note[0] = 66;
x->note[1] = 70;
x->note[2] = 63;
}
void ifsmusic_initDummyFunctions(t_ifsmusic *x) {
int i;
x->T[0] = 0;
x->T[1] = 0;
x->T[2] = 0;
x->S[0] = 1;
x->S[1] = 1;
x->S[2] = 1;
x->R[0] = 1;
x->R[1] = 1;
x->R[2] = 1;
x->nr_functions = 3;
for (i=0;i<x->nr_functions;i++) x->P[i] = (t_float) (i+1)/x->nr_functions;
}
void *ifsmusic_new(t_symbol *s, int argc, t_atom *argv)
{
t_ifsmusic *x = (t_ifsmusic *)pd_new(ifsmusic_class);
x->count = 0;
x->x_out = outlet_new(&x->x_obj,&s_float);
//x->mapped_out = outlet_new(&x->x_obj,&s_float);
if (argc == 0) ifsmusic_initDummyNoteSequence(x);
else {
int i;
x->nr_notes = argc;
for (i=0;i<argc;i++)
x->note[i] = atom_getfloat(argv+i);
}
ifsmusic_initDummyFunctions(x);
post("Ifsmusic initialised with sequence length: %d",x->nr_notes);
return (void *)x;
}
|
