public SidedPlane(final Vector p,final Vector A,final double BX,final double BY,final double BZ){
  super(A,BX,BY,BZ);
  sigNum=Math.signum(evaluate(p));
  if (sigNum == 0.0)   throw new IllegalArgumentException("Cannot determine sidedness because check point is on plane.");
}

public SidedPlane ( final Vector p , final Vector A , final double BX , final double BY , final double BZ ) { super ( A , BX , BY , BZ ) ; sigNum = Math . signum ( evaluate ( p ) ) ; if ( sigNum == 0.0 ) throw new IllegalArgumentException ( "Cannot determine sidedness because check point is on plane." ) ; }
construct a sided plane from a pair of vectors describing points , and including origin , plus a point p which describes the side .
