function inverse$1(out, a) {
    out[0] = 1.0 / a[0];
    out[1] = 1.0 / a[1];
    out[2] = 1.0 / a[2];
    out[3] = 1.0 / a[3];
    return out;
  }
Returns the inverse of the components of a vec4

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