lookup_tables/
bound.rs

1pub struct Interp;
2
3pub struct Clamp;
4
5pub trait Bound<Indep> {
6    fn upper_bound(indep: Indep, upper_bound: Indep) -> Indep;
7    fn lower_bound(indep: Indep, lower_bound: Indep) -> Indep;
8}
9
10impl<Indep> Bound<Indep> for Clamp
11where
12    Indep: std::cmp::PartialOrd,
13{
14    fn upper_bound(indep: Indep, upper_bound: Indep) -> Indep {
15        // dont use std::cmp::max here because it requires Ord, which floats dont have
16        if indep > upper_bound {
17            upper_bound
18        } else {
19            indep
20        }
21    }
22
23    fn lower_bound(indep: Indep, lower_bound: Indep) -> Indep {
24        // dont use std::cmp::min here because it requires Ord, which floats dont have
25        if indep < lower_bound {
26            lower_bound
27        } else {
28            indep
29        }
30    }
31}
32
33impl<Indep> Bound<Indep> for Interp {
34    fn upper_bound(indep: Indep, _upper_bound: Indep) -> Indep {
35        indep
36    }
37
38    fn lower_bound(indep: Indep, _lower_bound: Indep) -> Indep {
39        indep
40    }
41}
42
43#[cfg(test)]
44mod tests {
45    use super::*;
46
47    //
48    // Clamp Tests
49    //
50
51    #[test]
52    fn clamp_inbounds() {
53        let x = 2.5;
54        let lower = 0.0;
55        let higher = 5.0;
56        let output_high = Clamp::upper_bound(x, higher);
57        let output_low = Clamp::lower_bound(x, lower);
58
59        assert!(output_high == x);
60        assert!(output_low == x);
61    }
62
63    #[test]
64    fn clamp_high() {
65        let x = 10.0;
66        let lower = 0.0;
67        let higher = 5.0;
68        let output_high = Clamp::upper_bound(x, higher);
69        let output_low = Clamp::lower_bound(x, lower);
70
71        assert!(output_high == higher);
72        assert!(output_low == x);
73    }
74
75    #[test]
76    fn clamp_low() {
77        let x = -2.0;
78        let lower = 0.0;
79        let higher = 5.0;
80        let output_high = Clamp::upper_bound(x, higher);
81        let output_low = Clamp::lower_bound(x, lower);
82
83        assert!(output_high == x);
84        assert!(output_low == lower);
85    }
86
87    //
88    // Interp Tests
89    //
90
91    #[test]
92    fn interp_inbounds() {
93        let x = 2.5;
94        let lower = 0.0;
95        let higher = 5.0;
96        let output_high = Interp::upper_bound(x, higher);
97        let output_low = Interp::lower_bound(x, lower);
98
99        assert!(output_high == x);
100        assert!(output_low == x);
101    }
102
103    #[test]
104    fn interp_high() {
105        let x = 10.0;
106        let lower = 0.0;
107        let higher = 5.0;
108        let output_high = Interp::upper_bound(x, higher);
109        let output_low = Interp::lower_bound(x, lower);
110
111        assert!(output_high == x);
112        assert!(output_low == x);
113    }
114
115    #[test]
116    fn interp_low() {
117        let x = -2.0;
118        let lower = 0.0;
119        let higher = 5.0;
120        let output_high = Interp::upper_bound(x, higher);
121        let output_low = Interp::lower_bound(x, lower);
122
123        assert!(output_high == x);
124        assert!(output_low == x);
125    }
126}
lookup_tables/bound.rs

lookup_tables/
bound.rs
