mechanical_engineering/units/
temperature.rs

1#[derive(Debug, Clone)]
2pub enum Unit {
3    R,
4    K,
5    C,
6    F,
7}
8
9fn convert(from_value: f32, from_unit: &Unit, to_unit: &Unit) -> f32 {
10    match from_unit {
11        Unit::R => match to_unit {
12            Unit::R => from_value,
13            Unit::K => from_value * 5.0 / 9.0,
14            Unit::F => from_value - 459.67,
15            Unit::C => from_value * 5.0 / 9.0 - 273.15,
16        },
17        Unit::K => match to_unit {
18            Unit::R => from_value * 9.0 / 5.0,
19            Unit::K => from_value,
20            Unit::F => from_value * 9.0 / 5.0 - 459.67,
21            Unit::C => from_value - 273.15,
22        },
23        Unit::F => match to_unit {
24            Unit::R => from_value + 459.67,
25            Unit::K => (from_value + 459.67) * 5.0 / 9.0,
26            Unit::F => from_value,
27            Unit::C => (from_value - 32.0) * 5.0 / 9.0,
28        },
29        Unit::C => match to_unit {
30            Unit::R => (from_value + 273.15) * 9.0 / 5.0,
31            Unit::K => from_value + 273.15,
32            Unit::F => from_value * 9.0 / 5.0 + 32.0,
33            Unit::C => from_value,
34        },
35    }
36}
37
38#[derive(Debug, Clone)]
39pub struct Temperature {
40    value: f32,
41    unit: Unit,
42}
43
44impl Temperature {
45    pub fn new(value: f32, unit: Unit) -> Self {
46        Temperature { value, unit }
47    }
48
49    pub fn value(&self) -> f32 {
50        self.value
51    }
52
53    pub fn unit(&self) -> Unit {
54        self.unit.clone()
55    }
56
57    pub fn convert_unit(&mut self, new_unit: Unit) {
58        let new_value = convert(self.value, &self.unit, &new_unit);
59        self.value = new_value;
60        self.unit = new_unit;
61    }
62
63    pub fn ratio(t1: &Temperature, t2: &Temperature) -> f32 {
64        let t1_value_k = convert(t1.value, &t1.unit, &Unit::K);
65        let t2_value_k = convert(t2.value, &t2.unit, &Unit::K);
66        t2_value_k / t1_value_k
67    }
68
69    pub fn add_temperature(self, other: &Temperature) -> Self {
70        Temperature {
71            value: self.value() + scale_temperature(other.value(), self.unit(), other.unit()),
72            unit: self.unit,
73        }
74    }
75
76    pub fn subtract_temperature(self, other: &Temperature) -> Self {
77        Temperature {
78            value: self.value() - scale_temperature(other.value(), self.unit(), other.unit()),
79            unit: self.unit,
80        }
81    }
82}
83
84fn scale_temperature(value: f32, self_unit: Unit, other_unit: Unit) -> f32 {
85    match self_unit {
86        Unit::K => match other_unit {
87            Unit::K => value,
88            Unit::C => value,
89            Unit::F => value * 5.0 / 9.0,
90            Unit::R => value * 5.0 / 9.0,
91        },
92        Unit::C => match other_unit {
93            Unit::K => value,
94            Unit::C => value,
95            Unit::F => value * 5.0 / 9.0,
96            Unit::R => value * 5.0 / 9.0,
97        },
98        Unit::R => match other_unit {
99            Unit::K => value * 9.0 / 5.0,
100            Unit::C => value * 9.0 / 5.0,
101            Unit::F => value,
102            Unit::R => value,
103        },
104        Unit::F => match other_unit {
105            Unit::K => value * 9.0 / 5.0,
106            Unit::C => value * 9.0 / 5.0,
107            Unit::F => value,
108            Unit::R => value,
109        },
110    }
111}
mechanical_engineering/units/temperature.rs

mechanical_engineering/units/
temperature.rs
