/**
  * Draw a filled polygon with the given (x[i], y[i]) coordinates.
  *
  * @param x an array of all the x-coordindates of the polygon
  * @param y an array of all the y-coordindates of the polygon
  */
 public static void filledPolygon(double[] x, double[] y) {
   offscreen.fill(ShapeAssist.polygon(x, y));
   draw();
 }
 /**
  * Draw a polygon with the given (x[i], y[i]) coordinates.
  *
  * @param x an array of all the x-coordindates of the polygon
  * @param y an array of all the y-coordindates of the polygon
  */
 public static void polygon(double[] x, double[] y) {
   offscreen.draw(ShapeAssist.polygon(x, y));
   draw();
 }