function negate$1(out, a) {
    out[0] = -a[0];
    out[1] = -a[1];
    out[2] = -a[2];
    out[3] = -a[3];
    return out;
  }
Negates the components of a vec4

@param {vec4} out the receiving vector
@param {ReadonlyVec4} a vector to negate
@returns {vec4} out