use crate::{particle_system::Scalar, Point, Vector};

pub struct Line {
    pub point: Point,

    /// Has to be normalized
    pub vector: Vector,
}

impl Line {
    pub fn new(point: Point, vector: Vector) -> Self {
        Self {
            point,
            vector: vector.normalize(),
        }
    }

    pub fn distance_to_point(&self, point: Point) -> Scalar {
        let diff = point - self.point;
        let lambda = diff.dot(&self.vector);

        (diff - lambda * self.vector).norm()
    }
}