public Vector3 ceil(){
  x=(float)Math.ceil(x);
  y=(float)Math.ceil(y);
  z=(float)Math.ceil(z);
  return this;
}

public Vector3 ceil ( ) { x = ( float ) Math . ceil ( x ) ; y = ( float ) Math . ceil ( y ) ; z = ( float ) Math . ceil ( z ) ; return this ; }
rounds the x , y , and z values of this vector3 up to the nearest integer value .
