public static Vector3 round(Vector3 o){
  return new Vector3(Math.round(o.x),Math.round(o.y),Math.round(o.z));
}

public static Vector3 round ( Vector3 o ) { return new Vector3 ( Math . round ( o . x ) , Math . round ( o . y ) , Math . round ( o . z ) ) ; }
rounds the x , y , and z values of the given vector3 to the nearest integer value .
