text: import {Ellipse, EllipseGenerator} from './ellipse';
  
  let Rectangle = function(alpha,
      cX, cY, rX, rY,
      theta, color)
  {
      this.isRectangle = true;
      Ellipse.call(this, alpha,
          cX, cY, rX, rY,
          theta, color);
  };
  Rectangle.prototype = Object.create(Ellipse.prototype);
  Rectangle.prototype.constructor = Rectangle;
  
  let RectangleGenerator = function(
      inputWidth, inputHeight, useAdaptiveSampling, rotated)
  {
      EllipseGenerator.call(this,
          inputWidth, inputHeight, useAdaptiveSampling, rotated);
  };
  RectangleGenerator.prototype = Object.create(EllipseGenerator.prototype);
  RectangleGenerator.prototype.constructor = RectangleGenerator;
  
  export { Rectangle, RectangleGenerator };
  