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
ix!();
use crate::{
SineWaveOscillator,
};
impl SineWaveOscillator {
pub fn value_from_sin_and_cos(svalue: f32, cvalue: f32, shape: i32) -> f32
{
let mut pvalue: f32 = svalue;
let quadrant: i32 = match ((svalue > 0.0), (cvalue > 0.0)) {
(true, true) => 1,
(true, false) => 2,
(false, false) => 3,
(false, true) => 4,
};
match shape {
1 => {
if quadrant == 3 || quadrant == 4 {
pvalue = 0.0;
}
pvalue = 2.0 * pvalue - 1.0;
},
2 => {
if quadrant == 1 || quadrant == 3 {
pvalue = 0.0;
}
},
3 => {
if quadrant == 2 || quadrant == 4 {
pvalue = 0.0;
}
},
4 => {
match quadrant {
1 => pvalue = 1.0 - cvalue,
2 => pvalue = 1.0 + cvalue,
3 => pvalue = -1.0 - cvalue,
4 => pvalue = -1.0 + cvalue,
_ => unreachable!(),
}
},
5 => {
match quadrant {
1 => pvalue = 1.0 - cvalue,
2 => pvalue = 1.0 + cvalue,
_ => pvalue = 0.0,
}
pvalue = 2.0 * pvalue - 1.0;
},
6 => {
if quadrant <= 2 {
pvalue = 2.0 * svalue * cvalue;
} else {
pvalue = 0.0;
}
},
7 => {
pvalue = 2.0 * svalue * cvalue;
if quadrant == 2 || quadrant == 3 {
pvalue = -pvalue;
}
},
8 => {
pvalue = 2.0 * svalue * cvalue;
match quadrant {
2 | 4 => pvalue = 0.0,
3 => pvalue = -pvalue,
_ => {},
}
},
_ => {}
}
pvalue
}
}