Commit | Line | Data |
---|---|---|
2836f506 | 1 | use std::ops::{Add, AddAssign, Sub, SubAssign, Mul, MulAssign, Div, DivAssign, Neg}; |
296187ca | 2 | |
b0566120 TW |
3 | pub type Nanoseconds = u64; |
4 | ||
787dbfb4 | 5 | #[macro_export] |
296187ca | 6 | macro_rules! point { |
6ba7aef1 TW |
7 | ( $x:expr, $y:expr ) => { |
8 | Point2D { x: $x, y: $y } | |
9 | }; | |
296187ca TW |
10 | } |
11 | ||
b0566120 | 12 | #[derive(Debug, Default, Copy, Clone, PartialEq)] |
296187ca TW |
13 | pub struct Point2D<T> { |
14 | pub x: T, | |
15 | pub y: T, | |
16 | } | |
17 | ||
18 | impl Point2D<f64> { | |
19 | pub fn length(self) -> f64 { | |
20 | ((self.x * self.x) + (self.y * self.y)).sqrt() | |
21 | } | |
bf7b5671 TW |
22 | |
23 | pub fn to_i32(self) -> Point2D<i32> { | |
24 | Point2D { | |
25 | x: self.x as i32, | |
26 | y: self.y as i32, | |
27 | } | |
28 | } | |
296187ca TW |
29 | } |
30 | ||
6cd86b94 TW |
31 | macro_rules! point_op { |
32 | ($op:tt, $trait:ident($fn:ident), $trait_assign:ident($fn_assign:ident), $rhs:ident = $Rhs:ty => $x:expr, $y:expr) => { | |
33 | impl<T: $trait<Output = T>> $trait<$Rhs> for Point2D<T> { | |
34 | type Output = Self; | |
35 | ||
36 | fn $fn(self, $rhs: $Rhs) -> Self { | |
37 | Self { | |
38 | x: self.x $op $x, | |
39 | y: self.y $op $y, | |
40 | } | |
41 | } | |
2836f506 | 42 | } |
2836f506 | 43 | |
6cd86b94 TW |
44 | impl<T: $trait<Output = T> + Copy> $trait_assign<$Rhs> for Point2D<T> { |
45 | fn $fn_assign(&mut self, $rhs: $Rhs) { | |
46 | *self = Self { | |
47 | x: self.x $op $x, | |
48 | y: self.y $op $y, | |
49 | } | |
50 | } | |
2836f506 TW |
51 | } |
52 | } | |
53 | } | |
54 | ||
6cd86b94 TW |
55 | point_op!(+, Add(add), AddAssign(add_assign), rhs = Point2D<T> => rhs.x, rhs.y); |
56 | point_op!(-, Sub(sub), SubAssign(sub_assign), rhs = Point2D<T> => rhs.x, rhs.y); | |
57 | point_op!(*, Mul(mul), MulAssign(mul_assign), rhs = Point2D<T> => rhs.x, rhs.y); | |
58 | point_op!(/, Div(div), DivAssign(div_assign), rhs = Point2D<T> => rhs.x, rhs.y); | |
59 | point_op!(+, Add(add), AddAssign(add_assign), rhs = (T, T) => rhs.0, rhs.1); | |
60 | point_op!(-, Sub(sub), SubAssign(sub_assign), rhs = (T, T) => rhs.0, rhs.1); | |
61 | point_op!(*, Mul(mul), MulAssign(mul_assign), rhs = (T, T) => rhs.0, rhs.1); | |
62 | point_op!(/, Div(div), DivAssign(div_assign), rhs = (T, T) => rhs.0, rhs.1); | |
2836f506 TW |
63 | |
64 | ////////// multiply point with scalar ////////////////////////////////////////// | |
65 | impl<T: Mul<Output = T> + Copy> Mul<T> for Point2D<T> { | |
66 | type Output = Self; | |
67 | ||
68 | fn mul(self, rhs: T) -> Self { | |
69 | Self { | |
70 | x: self.x * rhs, | |
71 | y: self.y * rhs, | |
72 | } | |
73 | } | |
74 | } | |
75 | ||
76 | impl<T: Mul<Output = T> + Copy> MulAssign<T> for Point2D<T> { | |
77 | fn mul_assign(&mut self, rhs: T) { | |
78 | *self = Self { | |
79 | x: self.x * rhs, | |
80 | y: self.y * rhs, | |
81 | } | |
82 | } | |
83 | } | |
84 | ||
2836f506 TW |
85 | ////////// divide point with scalar //////////////////////////////////////////// |
86 | impl<T: Div<Output = T> + Copy> Div<T> for Point2D<T> { | |
87 | type Output = Self; | |
88 | ||
89 | fn div(self, rhs: T) -> Self { | |
90 | Self { | |
91 | x: self.x / rhs, | |
92 | y: self.y / rhs, | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
97 | impl<T: Div<Output = T> + Copy> DivAssign<T> for Point2D<T> { | |
98 | fn div_assign(&mut self, rhs: T) { | |
99 | *self = Self { | |
100 | x: self.x / rhs, | |
101 | y: self.y / rhs, | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
2836f506 TW |
106 | impl<T: Neg<Output = T>> Neg for Point2D<T> { |
107 | type Output = Self; | |
108 | ||
109 | fn neg(self) -> Self { | |
110 | Self { | |
111 | x: -self.x, | |
112 | y: -self.y, | |
113 | } | |
296187ca TW |
114 | } |
115 | } | |
116 | ||
b0566120 TW |
117 | impl<T> From<(T, T)> for Point2D<T> { |
118 | fn from(item: (T, T)) -> Self { | |
119 | Point2D { | |
120 | x: item.0, | |
121 | y: item.1, | |
122 | } | |
123 | } | |
124 | } | |
125 | ||
bf7b5671 TW |
126 | impl<T> From<Point2D<T>> for (T, T) { |
127 | fn from(item: Point2D<T>) -> Self { | |
128 | (item.x, item.y) | |
129 | } | |
130 | } | |
131 | ||
e58a1769 TW |
132 | impl From<Degrees> for Point2D<f64> { |
133 | fn from(item: Degrees) -> Self { | |
134 | Point2D { | |
135 | x: (item.0 * std::f64::consts::PI / 180.0).cos(), | |
136 | y: (item.0 * std::f64::consts::PI / 180.0).sin(), | |
137 | } | |
138 | } | |
139 | } | |
140 | ||
141 | impl From<Radians> for Point2D<f64> { | |
142 | fn from(item: Radians) -> Self { | |
143 | Point2D { | |
144 | x: item.0.cos(), | |
145 | y: item.0.sin(), | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
bf7b5671 TW |
150 | #[derive(Debug, Default, PartialEq, Clone, Copy)] |
151 | pub struct Degrees(pub f64); | |
152 | #[derive(Debug, Default, PartialEq, Clone, Copy)] | |
153 | pub struct Radians(pub f64); | |
e58a1769 TW |
154 | |
155 | impl Degrees { | |
bf7b5671 | 156 | #[allow(dead_code)] |
e58a1769 TW |
157 | fn to_radians(&self) -> Radians { |
158 | Radians(self.0 * std::f64::consts::PI / 180.0) | |
159 | } | |
160 | } | |
161 | ||
162 | impl Radians { | |
bf7b5671 | 163 | #[allow(dead_code)] |
e58a1769 TW |
164 | fn to_degrees(&self) -> Degrees { |
165 | Degrees(self.0 * 180.0 * std::f64::consts::FRAC_1_PI) | |
166 | } | |
167 | } | |
168 | ||
0b5024d1 TW |
169 | #[macro_export] |
170 | macro_rules! rect { | |
171 | ( $x:expr, $y:expr ) => { | |
172 | Rect { x: $x, y: $y } | |
173 | }; | |
174 | } | |
175 | ||
6edafdc0 TW |
176 | #[derive(Default)] |
177 | pub struct Rect<T> { | |
178 | pub width: T, | |
179 | pub height: T, | |
180 | } | |
181 | ||
6ba7aef1 | 182 | impl<T: Mul<Output = T> + Copy> Rect<T> { |
6edafdc0 TW |
183 | #[allow(dead_code)] |
184 | pub fn area(&self) -> T { | |
6ba7aef1 | 185 | self.width * self.height |
6edafdc0 TW |
186 | } |
187 | } | |
188 | ||
189 | impl<T> From<(T, T)> for Rect<T> { | |
190 | fn from(item: (T, T)) -> Self { | |
6ba7aef1 TW |
191 | Rect { |
192 | width: item.0, | |
193 | height: item.1, | |
194 | } | |
6edafdc0 TW |
195 | } |
196 | } | |
197 | ||
296187ca TW |
198 | #[cfg(test)] |
199 | mod tests { | |
200 | use super::*; | |
201 | ||
202 | #[test] | |
203 | fn immutable_copy_of_point() { | |
204 | let a = point!(0, 0); | |
205 | let mut b = a; // Copy | |
206 | assert_eq!(a, b); // PartialEq | |
207 | b.x = 1; | |
208 | assert_ne!(a, b); // PartialEq | |
209 | } | |
210 | ||
211 | #[test] | |
212 | fn add_points() { | |
213 | let mut a = point!(1, 0); | |
214 | assert_eq!(a + point!(2, 2), point!(3, 2)); // Add | |
215 | a += point!(2, 2); // AddAssign | |
216 | assert_eq!(a, point!(3, 2)); | |
2836f506 TW |
217 | assert_eq!(point!(1, 0) + (2, 3), point!(3, 3)); |
218 | } | |
219 | ||
220 | #[test] | |
221 | fn sub_points() { | |
222 | let mut a = point!(1, 0); | |
223 | assert_eq!(a - point!(2, 2), point!(-1, -2)); | |
224 | a -= point!(2, 2); | |
225 | assert_eq!(a, point!(-1, -2)); | |
6cd86b94 | 226 | assert_eq!(point!(1, 0) - (2, 3), point!(-1, -3)); |
2836f506 TW |
227 | } |
228 | ||
229 | #[test] | |
230 | fn mul_points() { | |
231 | let mut a = point!(1, 2); | |
232 | assert_eq!(a * 2, point!(2, 4)); | |
233 | assert_eq!(a * point!(2, 3), point!(2, 6)); | |
234 | a *= 2; | |
235 | assert_eq!(a, point!(2, 4)); | |
236 | a *= point!(3, 1); | |
237 | assert_eq!(a, point!(6, 4)); | |
6cd86b94 | 238 | assert_eq!(point!(1, 0) * (2, 3), point!(2, 0)); |
2836f506 TW |
239 | } |
240 | ||
241 | #[test] | |
242 | fn div_points() { | |
243 | let mut a = point!(4, 8); | |
244 | assert_eq!(a / 2, point!(2, 4)); | |
245 | assert_eq!(a / point!(2, 4), point!(2, 2)); | |
246 | a /= 2; | |
247 | assert_eq!(a, point!(2, 4)); | |
248 | a /= point!(2, 4); | |
249 | assert_eq!(a, point!(1, 1)); | |
6cd86b94 | 250 | assert_eq!(point!(6, 3) / (2, 3), point!(3, 1)); |
2836f506 TW |
251 | } |
252 | ||
253 | #[test] | |
254 | fn neg_point() { | |
255 | assert_eq!(point!(1, 1), -point!(-1, -1)); | |
296187ca | 256 | } |
6edafdc0 TW |
257 | |
258 | #[test] | |
e58a1769 TW |
259 | fn angles() { |
260 | assert_eq!(Radians(0.0).to_degrees(), Degrees(0.0)); | |
261 | assert_eq!(Radians(std::f64::consts::PI).to_degrees(), Degrees(180.0)); | |
262 | assert_eq!(Degrees(180.0).to_radians(), Radians(std::f64::consts::PI)); | |
263 | assert!((Point2D::from(Degrees(90.0)) - point!(0.0, 1.0)).length() < 0.001); | |
264 | assert!((Point2D::from(Radians(std::f64::consts::FRAC_PI_2)) - point!(0.0, 1.0)).length() < 0.001); | |
265 | } | |
266 | ||
267 | #[test] | |
6edafdc0 TW |
268 | fn area_for_rect_of_multipliable_type() { |
269 | let r: Rect<_> = (30, 20).into(); // the Into trait uses the From trait | |
6ba7aef1 | 270 | assert_eq!(r.area(), 30 * 20); |
6edafdc0 TW |
271 | // let a = Rect::from(("a".to_string(), "b".to_string())).area(); // this doesn't work, because area() is not implemented for String |
272 | } | |
296187ca | 273 | } |