rust_3d/
circle.rs

1/*
2Copyright 2017 Martin Buck
3
4Permission is hereby granted, free of charge, to any person obtaining a copy
5of this software and associated documentation files (the "Software"),
6to deal in the Software without restriction, including without limitation the
7rights to use, copy, modify, merge, publish, distribute, sublicense,
8and/or sell copies of the Software, and to permit persons to whom the Software
9is furnished to do so, subject to the following conditions:
10
11The above copyright notice and this permission notice shall
12be included all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
19TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
20OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21*/
22
23//! Circle, a circle in 2D space
24
25use std::cmp::{Eq, Ordering};
26
27use crate::*;
28
29//------------------------------------------------------------------------------
30
31#[derive(Debug, PartialEq, PartialOrd, Clone, Hash, Default)]
32/// Circle, a circle in 2D space
33pub struct Circle {
34    pub center: Point2D,
35    pub radius: Positive,
36}
37
38impl Eq for Circle {}
39
40impl Ord for Circle {
41    fn cmp(&self, other: &Self) -> Ordering {
42        let origin = Point2D::default();
43        match sqr_dist_2d(&origin, &self.center).partial_cmp(&sqr_dist_2d(&origin, &other.center)) {
44            Some(x) => x,
45            None => self
46                .radius
47                .partial_cmp(&other.radius)
48                .unwrap_or(Ordering::Equal),
49        }
50    }
51}
52
53impl IsND for Circle {
54    fn n_dimensions() -> usize {
55        Point2D::n_dimensions()
56    }
57
58    fn position_nd(&self, dimension: usize) -> Result<f64> {
59        self.center.position_nd(dimension)
60    }
61}
62
63impl Is2D for Circle {
64    #[inline(always)]
65    fn x(&self) -> f64 {
66        self.center.x()
67    }
68
69    #[inline(always)]
70    fn y(&self) -> f64 {
71        self.center.y()
72    }
73}
74
75impl IsBuildableND for Circle {
76    #[inline(always)]
77    fn new_nd(coords: &[f64]) -> Result<Self> {
78        Ok(Circle {
79            center: Point2D::new_nd(coords)?,
80            radius: Positive::one(),
81        })
82    }
83
84    #[inline(always)]
85    fn from_nd<P>(&mut self, other: P) -> Result<()>
86    where
87        P: IsBuildableND,
88    {
89        self.center.from_nd(other)
90    }
91}
92
93impl IsBuildable2D for Circle {
94    #[inline(always)]
95    fn new(x: f64, y: f64) -> Self {
96        Circle {
97            center: Point2D { x, y },
98            radius: Positive::one(),
99        }
100    }
101
102    #[inline(always)]
103    fn from<P>(&mut self, other: &P)
104    where
105        P: Is2D,
106    {
107        self.center.from(other)
108    }
109}
110
111impl IsEditableND for Circle {
112    fn set_position(&mut self, dimension: usize, val: f64) -> Result<()> {
113        self.center.set_position(dimension, val)
114    }
115}
116
117impl IsEditable2D for Circle {
118    #[inline(always)]
119    fn set_x(&mut self, val: f64) {
120        self.center.set_x(val);
121    }
122
123    #[inline(always)]
124    fn set_y(&mut self, val: f64) {
125        self.center.set_y(val);
126    }
127}
128
129impl HasBoundingBox2D for Circle {
130    fn bounding_box(&self) -> BoundingBox2D {
131        let p_min = Point2D {
132            x: self.center.x() - self.radius.get(),
133            y: self.center.y() - self.radius.get(),
134        };
135        let p_max = Point2D {
136            x: self.center.x() + self.radius.get(),
137            y: self.center.y() + self.radius.get(),
138        };
139        BoundingBox2D::new(&p_min, &p_max).unwrap() // safe
140    }
141}
142
143impl HasBoundingBox2DMaybe for Circle {
144    fn bounding_box_maybe(&self) -> Result<BoundingBox2D> {
145        Ok(self.bounding_box())
146    }
147}
148
149impl IsScalable for Circle {
150    fn scale(&mut self, factor: Positive) {
151        self.radius *= factor;
152    }
153}
rust_3d/circle.rs

rust_3d/
circle.rs
