#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Vec2d {
    pub x: f64,
    pub y: f64
}

impl Vec2d {
    pub fn distance(&self, other: Vec2d) -> f64 {
        ((other.x-self.x).powi(2) + (other.y-self.y).powi(2)).sqrt()
    }
}