askew 0.1.0

Angles (degrees, radians, and turns)
Documentation 
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

use crate::Angle;
use approx::{AbsDiffEq, RelativeEq, UlpsEq};

impl AbsDiffEq for Angle {
    type Epsilon = f32;

    #[inline]
    fn default_epsilon() -> Self::Epsilon {
        f32::default_epsilon()
    }

    #[inline]
    fn abs_diff_eq(&self, other: &Self, epsilon: Self::Epsilon) -> bool {
        self.radians.abs_diff_eq(&other.radians, epsilon)
    }
}

impl RelativeEq for Angle {
    #[inline]
    fn default_max_relative() -> Self::Epsilon {
        f32::default_max_relative()
    }

    #[inline]
    fn relative_eq(
        &self,
        other: &Self,
        epsilon: Self::Epsilon,
        max_relative: Self::Epsilon,
    ) -> bool {
        let radians = &self.radians;
        let other = &other.radians;
        radians.relative_eq(other, epsilon, max_relative)
    }
}

impl UlpsEq for Angle {
    #[inline]
    fn default_max_ulps() -> u32 {
        f32::default_max_ulps()
    }

    #[inline]
    fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool {
        self.radians.ulps_eq(&other.radians, epsilon, max_ulps)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn abs_diff_eq_angle() {
        let a = Angle::from_radians(1.0);
        let b = Angle::from_radians(1.0 + f32::EPSILON);
        assert!(a.abs_diff_eq(&b, f32::EPSILON));
        assert!(!a.abs_diff_eq(&b, 0.0));
    }

    #[test]
    fn abs_diff_default_epsilon() {
        let a = Angle::from_radians(1.0);
        let b = Angle::from_radians(1.0 + f32::EPSILON);
        assert!(a.abs_diff_eq(&b, Angle::default_epsilon()));
    }

    #[test]
    fn relative_eq_angle() {
        let a = Angle::from_radians(1.0);
        let b = Angle::from_radians(1.0 + f32::EPSILON);
        assert!(a.relative_eq(&b, f32::EPSILON, f32::default_max_relative()));

        let c = Angle::from_radians(1.0);
        let d = Angle::from_radians(2.0);
        assert!(!c.relative_eq(&d, f32::EPSILON, f32::default_max_relative()));
    }

    #[test]
    fn relative_eq_default_max_relative() {
        let a = Angle::from_radians(1.0);
        let b = Angle::from_radians(1.0 + f32::EPSILON);
        assert!(a.relative_eq(&b, f32::EPSILON, Angle::default_max_relative()));
    }

    #[test]
    fn ulps_eq_angle() {
        let a = Angle::from_radians(1.0);
        let b = Angle::from_radians(1.0 + f32::EPSILON);
        assert!(a.ulps_eq(&b, f32::EPSILON, 4));
        assert!(a.ulps_eq(&b, f32::EPSILON, 0));

        let c = Angle::from_radians(1.0);
        let d = Angle::from_radians(2.0);
        assert!(!c.ulps_eq(&d, f32::EPSILON, 4));
        assert!(!c.ulps_eq(&d, f32::EPSILON, 0));
    }

    #[test]
    fn ulps_eq_default_max_ulps() {
        let a = Angle::from_radians(1.0);
        let b = Angle::from_radians(1.0 + f32::EPSILON);
        assert!(a.ulps_eq(&b, f32::EPSILON, Angle::default_max_ulps()));
    }
}