#[derive(Debug, Clone, Copy)]
pub struct Vec3 {
    pub x: f32,
    pub y: f32,
    pub z: f32,
}

impl Vec3 {
    pub fn new(x: f32, y: f32, z: f32) -> Self {
        Vec3 { x, y, z }
    }

    pub fn squared_length(&self) -> f32 {
        self.x * self.x + self.y * self.y + self.z * self.z
    }

    pub fn length(&self) -> f32 {
        self.squared_length().sqrt()
    }

    pub fn normalize(&self) -> Vec3 {
        let len = self.length();
        if len != 0.0 {
            Vec3 {
                x: self.x / len,
                y: self.y / len,
                z: self.z / len,
            }
        } else {
            // Return zero vector if length is zero to avoid NaNs
            Vec3 {
                x: 0.0,
                y: 0.0,
                z: 0.0,
            }
        }
    }
}