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mod angle;
mod real;
pub(crate) use angle::angle_consts;
pub(crate) use angle::Trigonometry;
pub use angle::{Angle, AngleUnit};
pub use embedded_graphics_core::geometry::{
AnchorPoint, Dimensions, OriginDimensions, Point, Size,
};
pub(crate) use real::Real;
pub(crate) trait PointExt {
fn rotate_90(self) -> Self;
fn dot_product(self, other: Point) -> i32;
fn determinant(self, other: Point) -> i32;
fn length_squared(self) -> i32;
}
impl PointExt for Point {
fn rotate_90(self) -> Self {
Self::new(self.y, -self.x)
}
fn dot_product(self, other: Point) -> i32 {
self.x * other.x + self.y * other.y
}
fn determinant(self, other: Point) -> i32 {
self.x * other.y - self.y * other.x
}
fn length_squared(self) -> i32 {
self.x.pow(2) + self.y.pow(2)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn check_length_squared() {
let p = Point::new(3, 4);
assert_eq!(p.length_squared(), 25);
}
#[test]
fn rotate_90() {
assert_eq!(Point::new(1, 0).rotate_90(), Point::new(0, -1));
assert_eq!(Point::new(0, -2).rotate_90(), Point::new(-2, 0));
assert_eq!(Point::new(-3, 0).rotate_90(), Point::new(0, 3));
assert_eq!(Point::new(0, 4).rotate_90(), Point::new(4, 0));
}
}