1 use std::ops::{Add, AddAssign, Sub, SubAssign, Mul, MulAssign, Div, DivAssign, Neg};
5 ( $x:expr, $y:expr ) => {
6 Point2D { x: $x, y: $y }
10 #[derive(Debug, Default, Copy, Clone, PartialEq)]
11 pub struct Point2D<T> {
17 pub fn length(self) -> f64 {
18 ((self.x * self.x) + (self.y * self.y)).sqrt()
21 pub fn to_i32(self) -> Point2D<i32> {
29 macro_rules! point_op {
30 ($op:tt, $trait:ident($fn:ident), $trait_assign:ident($fn_assign:ident), $rhs:ident = $Rhs:ty => $x:expr, $y:expr) => {
31 impl<T: $trait<Output = T>> $trait<$Rhs> for Point2D<T> {
34 fn $fn(self, $rhs: $Rhs) -> Self {
42 impl<T: $trait<Output = T> + Copy> $trait_assign<$Rhs> for Point2D<T> {
43 fn $fn_assign(&mut self, $rhs: $Rhs) {
53 point_op!(+, Add(add), AddAssign(add_assign), rhs = Point2D<T> => rhs.x, rhs.y);
54 point_op!(-, Sub(sub), SubAssign(sub_assign), rhs = Point2D<T> => rhs.x, rhs.y);
55 point_op!(*, Mul(mul), MulAssign(mul_assign), rhs = Point2D<T> => rhs.x, rhs.y);
56 point_op!(/, Div(div), DivAssign(div_assign), rhs = Point2D<T> => rhs.x, rhs.y);
57 point_op!(+, Add(add), AddAssign(add_assign), rhs = (T, T) => rhs.0, rhs.1);
58 point_op!(-, Sub(sub), SubAssign(sub_assign), rhs = (T, T) => rhs.0, rhs.1);
59 point_op!(*, Mul(mul), MulAssign(mul_assign), rhs = (T, T) => rhs.0, rhs.1);
60 point_op!(/, Div(div), DivAssign(div_assign), rhs = (T, T) => rhs.0, rhs.1);
62 ////////// multiply point with scalar //////////////////////////////////////////
63 impl<T: Mul<Output = T> + Copy> Mul<T> for Point2D<T> {
66 fn mul(self, rhs: T) -> Self {
74 impl<T: Mul<Output = T> + Copy> MulAssign<T> for Point2D<T> {
75 fn mul_assign(&mut self, rhs: T) {
83 ////////// divide point with scalar ////////////////////////////////////////////
84 impl<T: Div<Output = T> + Copy> Div<T> for Point2D<T> {
87 fn div(self, rhs: T) -> Self {
95 impl<T: Div<Output = T> + Copy> DivAssign<T> for Point2D<T> {
96 fn div_assign(&mut self, rhs: T) {
104 impl<T: Neg<Output = T>> Neg for Point2D<T> {
107 fn neg(self) -> Self {
115 impl<T> From<(T, T)> for Point2D<T> {
116 fn from(item: (T, T)) -> Self {
124 impl<T> From<Point2D<T>> for (T, T) {
125 fn from(item: Point2D<T>) -> Self {
130 impl From<Degrees> for Point2D<f64> {
131 fn from(item: Degrees) -> Self {
133 x: (item.0 * std::f64::consts::PI / 180.0).cos(),
134 y: (item.0 * std::f64::consts::PI / 180.0).sin(),
139 impl From<Radians> for Point2D<f64> {
140 fn from(item: Radians) -> Self {
148 #[derive(Debug, Default, PartialEq, Clone, Copy)]
149 pub struct Degrees(pub f64);
150 #[derive(Debug, Default, PartialEq, Clone, Copy)]
151 pub struct Radians(pub f64);
155 fn to_radians(&self) -> Radians {
156 Radians(self.0 * std::f64::consts::PI / 180.0)
162 fn to_degrees(&self) -> Degrees {
163 Degrees(self.0 * 180.0 * std::f64::consts::FRAC_1_PI)
169 ( $x:expr, $y:expr ) => {
170 Rect { x: $x, y: $y }
180 impl<T: Mul<Output = T> + Copy> Rect<T> {
182 pub fn area(&self) -> T {
183 self.width * self.height
187 impl<T> From<(T, T)> for Rect<T> {
188 fn from(item: (T, T)) -> Self {
197 macro_rules! hashmap {
198 ($($k:expr => $v:expr),*) => {
200 let mut map = std::collections::HashMap::new();
201 $(map.insert($k, $v);)*
212 fn immutable_copy_of_point() {
213 let a = point!(0, 0);
214 let mut b = a; // Copy
215 assert_eq!(a, b); // PartialEq
217 assert_ne!(a, b); // PartialEq
222 let mut a = point!(1, 0);
223 assert_eq!(a + point!(2, 2), point!(3, 2)); // Add
224 a += point!(2, 2); // AddAssign
225 assert_eq!(a, point!(3, 2));
226 assert_eq!(point!(1, 0) + (2, 3), point!(3, 3));
231 let mut a = point!(1, 0);
232 assert_eq!(a - point!(2, 2), point!(-1, -2));
234 assert_eq!(a, point!(-1, -2));
235 assert_eq!(point!(1, 0) - (2, 3), point!(-1, -3));
240 let mut a = point!(1, 2);
241 assert_eq!(a * 2, point!(2, 4));
242 assert_eq!(a * point!(2, 3), point!(2, 6));
244 assert_eq!(a, point!(2, 4));
246 assert_eq!(a, point!(6, 4));
247 assert_eq!(point!(1, 0) * (2, 3), point!(2, 0));
252 let mut a = point!(4, 8);
253 assert_eq!(a / 2, point!(2, 4));
254 assert_eq!(a / point!(2, 4), point!(2, 2));
256 assert_eq!(a, point!(2, 4));
258 assert_eq!(a, point!(1, 1));
259 assert_eq!(point!(6, 3) / (2, 3), point!(3, 1));
264 assert_eq!(point!(1, 1), -point!(-1, -1));
269 assert_eq!(Radians(0.0).to_degrees(), Degrees(0.0));
270 assert_eq!(Radians(std::f64::consts::PI).to_degrees(), Degrees(180.0));
271 assert_eq!(Degrees(180.0).to_radians(), Radians(std::f64::consts::PI));
272 assert!((Point2D::from(Degrees(90.0)) - point!(0.0, 1.0)).length() < 0.001);
273 assert!((Point2D::from(Radians(std::f64::consts::FRAC_PI_2)) - point!(0.0, 1.0)).length() < 0.001);
277 fn area_for_rect_of_multipliable_type() {
278 let r: Rect<_> = (30, 20).into(); // the Into trait uses the From trait
279 assert_eq!(r.area(), 30 * 20);
280 // let a = Rect::from(("a".to_string(), "b".to_string())).area(); // this doesn't work, because area() is not implemented for String