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use super::Vec4;

impl Vec4 {
    #[inline]
    pub fn sign(self) -> Self {
        let mask = self.cmpge(Self::zero());
        mask.select(Self::splat(1.0), Self::splat(-1.0))
    }

    #[inline]
    pub fn reciprocal(self) -> Self {
        // TODO: Optimize
        Self::one() / self
    }

    #[inline]
    pub fn lerp(self, rhs: Self, s: f32) -> Self {
        self + ((rhs - self) * s)
    }
}

impl AsRef<[f32; 4]> for Vec4 {
    #[inline]
    fn as_ref(&self) -> &[f32; 4] {
        unsafe { &*(self as *const Self as *const [f32; 4]) }
    }
}

impl AsMut<[f32; 4]> for Vec4 {
    #[inline]
    fn as_mut(&mut self) -> &mut [f32; 4] {
        unsafe { &mut *(self as *mut Self as *mut [f32; 4]) }
    }
}