/*
  2D Shapes - sample system
  Last updated: May 22, 2008
*/
//Namespace for facade class.
namespace Shapes

//Namespace for core of the system.
namespace Shapes.core

class Shape2D {
 center;
}
//Abstract
class EllipticalShape {
 isA Shape2D;
 semiMajorAxis;
}
//Abstract
class Polygon { 
 isA Shape2D;
}
class Circle {
 isA EllipticalShape;
}
class Ellipse{
 isA EllipticalShape;
}
class SimplePolygon {
 orientation;
 isA Polygon;
}
class ArbitraryPolygon {
 points;
 isA Polygon;
}
class Rectangle {
 isA SimplePolygon;
 height;
 width;
}
class RegularPolygon {
 numPoints;
 radius;
 isA SimplePolygon;
}