#[derive(Debug)]
pub struct V3 {
    pub x: f64,
    pub y: f64,
    pub z: f64
}
impl std::fmt::Display for V3 {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "[{}, {}, {}]", self.x, self.y, self.z)
    }
}

impl std::ops::Mul<f64> for V3 {
    type Output = V3;
    fn mul(self, f: f64) -> Self::Output {
        V3 {
            x: self.x * f,
            y: self.y * f,
            z: self.z * f
        }
    }
}
impl std::ops::Add<V3> for V3 {
    type Output = V3;
    fn add(self, rhs: V3) -> V3 {
        V3 {
            x: self.x + rhs.x,
            y: self.y + rhs.y,
            z: self.z + rhs.z
        }
    }
}