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

public SidedPlane ( final double pX , final double pY , final double pZ , final Vector A , final Vector B ) { super ( A , B ) ; sigNum = Math . signum ( evaluate ( pX , pY , pZ ) ) ; 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 .
