eproj-core 0.0.1-alpha.9

Core primitives and operations for coordinate reference system transformations.
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
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
152
153
154
155
156
157
158
159
160
161

use std::ops::{Add, Sub};

/// Implemented with [Coord3D](https://github.com/busstoptaktik/geodesy/blob/main/src/coordinate/coor3d.rs)
/// from the `geodesy` crate as a role model.
#[derive(Debug, Default, PartialEq, Copy, Clone)]
pub struct Coordinate3 {
    pub coords: [f64; 3],
}

impl Coordinate3 {
    /// A `Coordinate3` from longitude/latitude/height, with the angular input in radians
    pub fn new(first: f64, second: f64, third: f64) -> Self {
        Self {
            coords: [first, second, third],
        }
    }

    /// A `Coordinate3` from latitude/longitude/height, with the angular input in degrees
    pub fn geo(latitude: f64, longitude: f64, height: f64) -> Self {
        Self {
            coords: [longitude.to_radians(), latitude.to_radians(), height],
        }
    }

    /// A `Coordinate3` from longitude/latitude/height, with the angular input in degrees
    pub fn gis(longitude: f64, latitude: f64, height: f64) -> Self {
        Self {
            coords: [longitude.to_radians(), latitude.to_radians(), height],
        }
    }
}

impl Coordinate3 {
    pub fn x(&self) -> f64 {
        self.coords[0]
    }
    pub fn y(&self) -> f64 {
        self.coords[1]
    }
    pub fn z(&self) -> f64 {
        self.coords[2]
    }
}

impl Add for Coordinate3 {
    type Output = Self;
    fn add(self, other: Self) -> Self {
        Self::new(
            self.coords[0] + other.coords[0],
            self.coords[1] + other.coords[1],
            self.coords[2] + other.coords[2],
        )
    }
}

impl Add<&Coordinate3> for Coordinate3 {
    type Output = Self;
    fn add(self, other: &Self) -> Self {
        Self::new(
            self.coords[0] + other.coords[0],
            self.coords[1] + other.coords[1],
            self.coords[2] + other.coords[2],
        )
    }
}

impl Sub for Coordinate3 {
    type Output = Self;
    fn sub(self, other: Self) -> Self {
        Self::new(
            self.coords[0] - other.coords[0],
            self.coords[1] - other.coords[1],
            self.coords[2] - other.coords[2],
        )
    }
}

impl Coordinate3 {
    /// Transform the first two elements of a `Coordinate3` from degrees to radians
    pub fn to_radians(self) -> Self {
        Self::new(
            self.coords[0].to_radians(),
            self.coords[1].to_radians(),
            self.coords[2],
        )
    }

    /// Transform the first two elements of a `Coordinate3` from radians to degrees
    pub fn to_degrees(self) -> Self {
        Self::new(
            self.coords[0].to_degrees(),
            self.coords[1].to_degrees(),
            self.coords[2],
        )
    }

    /// Transform the first two elements of a `Coordinate3` from radians to seconds
    /// of arc.
    pub fn to_arcsec(self) -> Self {
        Self::new(
            self.coords[0].to_degrees() * 3600.,
            self.coords[1].to_degrees() * 3600.,
            self.coords[2],
        )
    }

    /// Transform the internal lon/lat/h/t-in-radians to lat/lon/h/t-in-degrees
    fn to_geo(self) -> Self {
        Self::new(
            self.coords[1].to_degrees(),
            self.coords[0].to_degrees(),
            self.coords[2],
        )
    }
}

impl Coordinate3 {
    /// Euclidean distance between two points in the 3D space.
    pub fn hypot3(&self, other: &Self) -> f64 {
        (self.coords[0] - other.coords[0])
            .hypot(self.coords[1] - other.coords[1])
            .hypot(self.coords[2] - other.coords[2])
    }
}

impl From<Coordinate3> for nalgebra::Point3<f64> {
    fn from(item: Coordinate3) -> Self {
        Self::new(item.x(), item.y(), item.z())
    }
}

impl From<nalgebra::Point3<f64>> for Coordinate3 {
    fn from(item: nalgebra::Point3<f64>) -> Self {
        Self::new(item.x, item.y, item.z)
    }
}

impl From<Coordinate3> for nalgebra::Vector3<f64> {
    fn from(item: Coordinate3) -> Self {
        Self::new(item.x(), item.y(), item.z())
    }
}

impl From<nalgebra::Vector3<f64>> for Coordinate3 {
    fn from(item: nalgebra::Vector3<f64>) -> Self {
        Self::new(item.x, item.y, item.z)
    }
}

#[cfg(test)]
mod tests {
    use crate::Coordinate3;

    #[test]
    fn basic_conversion() {
        let point = nalgebra::Point3::origin();
        let coordinate: Coordinate3 = point.into();

        assert_eq!(coordinate, Coordinate3::new(0.0, 0.0, 0.0));
    }
}