use Neg;
use crateVec3;
/// ```
/// use gfxmath_vec3::ops::Cross;
/// use gfxmath_vec3::Vec3;
///
/// let a = Vec3::new(1.0, 3.0, 2.5);
///
/// let res = -a;
///
/// assert_eq!(-1.0, res.x);
/// assert_eq!(-3.0, res.y);
/// assert_eq!(-2.5, res.z);
/// ```