negate.js
function negate(out, a) {
    out[0] = -a[0]
    out[1] = -a[1]
    out[2] = -a[2]
    return out
}
function negate(out, a) {
    out[0] = -a[0]
    out[1] = -a[1]
    out[2] = -a[2]
    return out
}
function negate ( out , a ) { out [ 0 ] = - a [ 0 ] out [ 1 ] = - a [ 1 ] out [ 2 ] = - a [ 2 ] return out }
Negates the components of a vec3

@param {vec3} out the receiving vector
@param {vec3} a vector to negate
@returns {vec3} out
Negates the components of a vec3