public Plane(final Plane basePlane,final boolean above){
  this(basePlane.x,basePlane.y,basePlane.z,above ? Math.nextUp(basePlane.D + MINIMUM_RESOLUTION) : Math.nextDown(basePlane.D - MINIMUM_RESOLUTION));
}

public Plane ( final Plane basePlane , final boolean above ) { this ( basePlane . x , basePlane . y , basePlane . z , above ? Math . nextUp ( basePlane . D + MINIMUM_RESOLUTION ) : Math . nextDown ( basePlane . D - MINIMUM_RESOLUTION ) ) ; }
construct a plane that is parallel to the one provided , but which is just barely numerically distinguishable from it , in the direction desired .
