  void getRect (double *xa1, double *ya1, double *xa2, double *ya2)
	  { *xa1 = x1; *ya1 = y1; *xa2 = x2; *ya2 = y2; }
  void getRect (double *xa1, double *ya1, double *xa2, double *ya2)
	  { *xa1 = x1; *ya1 = y1; *xa2 = x2; *ya2 = y2; }