struct Vector2d {
    x: f32,
    y: f32
}

struct Vector3d {
    x: f32,
    y: f32,
    z: f32
}

impl Vector2d {
    pub fn new(x_f32: f32, y_f32: f32) -> Vector2d {
        Vector2d {
            x: x_f32,
            y: y_f32
        }
    }
}

impl Vector3d {
    pub fn new(x_f32: f32, y_f32: f32, z_f32: f32) -> Vector3d {
        Vector3d {
            x: x_f32,
            y: y_f32,
            z: z_f32
        }
    }
}