use std::ops::{Add, AddAssign, Sub, SubAssign, Mul, MulAssign, Div, DivAssign, Neg};
-pub type Nanoseconds = u64;
-
#[macro_export]
macro_rules! point {
( $x:expr, $y:expr ) => {
}
impl Point2D<f64> {
- pub fn length(self) -> f64 {
+ pub fn length(&self) -> f64 {
((self.x * self.x) + (self.y * self.y)).sqrt()
}
+
+ pub fn normalized(&self) -> Self {
+ let l = self.length();
+ Self {
+ x: self.x / l,
+ y: self.y / l,
+ }
+ }
+
+ pub fn to_radians(&self) -> Radians {
+ Radians(self.y.atan2(self.x))
+ }
+
+ pub fn to_degrees(&self) -> Degrees {
+ self.to_radians().to_degrees()
+ }
+
+ pub fn to_i32(self) -> Point2D<i32> {
+ Point2D {
+ x: self.x as i32,
+ y: self.y as i32,
+ }
+ }
}
macro_rules! point_op {
}
}
+impl<T> From<Point2D<T>> for (T, T) {
+ fn from(item: Point2D<T>) -> Self {
+ (item.x, item.y)
+ }
+}
+
+impl From<Degrees> for Point2D<f64> {
+ fn from(item: Degrees) -> Self {
+ let r = item.0.to_radians();
+ Point2D {
+ x: r.cos(),
+ y: r.sin(),
+ }
+ }
+}
+
+impl From<Radians> for Point2D<f64> {
+ fn from(item: Radians) -> Self {
+ Point2D {
+ x: item.0.cos(),
+ y: item.0.sin(),
+ }
+ }
+}
+
+#[derive(Debug, Default, PartialEq, Clone, Copy)]
+pub struct Degrees(pub f64);
+#[derive(Debug, Default, PartialEq, Clone, Copy)]
+pub struct Radians(pub f64);
+
+impl Degrees {
+ #[allow(dead_code)]
+ fn to_radians(&self) -> Radians {
+ Radians(self.0.to_radians())
+ }
+}
+
+impl Radians {
+ #[allow(dead_code)]
+ fn to_degrees(&self) -> Degrees {
+ Degrees(self.0.to_degrees())
+ }
+}
+
#[macro_export]
macro_rules! rect {
( $x:expr, $y:expr ) => {
}
}
+#[macro_export]
+macro_rules! hashmap {
+ ($($k:expr => $v:expr),*) => {
+ {
+ let mut map = std::collections::HashMap::new();
+ $(map.insert($k, $v);)*
+ map
+ }
+ }
+}
+
#[cfg(test)]
mod tests {
use super::*;
}
#[test]
+ fn angles() {
+ assert_eq!(Radians(0.0).to_degrees(), Degrees(0.0));
+ assert_eq!(Radians(std::f64::consts::PI).to_degrees(), Degrees(180.0));
+ assert_eq!(Degrees(180.0).to_radians(), Radians(std::f64::consts::PI));
+ assert!((Point2D::from(Degrees(90.0)) - point!(0.0, 1.0)).length() < 0.001);
+ assert!((Point2D::from(Radians(std::f64::consts::FRAC_PI_2)) - point!(0.0, 1.0)).length() < 0.001);
+ }
+
+ #[test]
fn area_for_rect_of_multipliable_type() {
let r: Rect<_> = (30, 20).into(); // the Into trait uses the From trait
assert_eq!(r.area(), 30 * 20);