function clone$4(a) {
    var out = new ARRAY_TYPE(3);
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    return out;
  }
Creates a new vec3 initialized with values from an existing vector

@param {ReadonlyVec3} a vector to clone
@returns {vec3} a new 3D vector