We use many standard design patterns throughtout OpenEngine. The following is a list over patterns we use and the specific classes that use them. You may find more info on these patterns in the classic  Design Patterns.

 Visitor (GoF 331)

• ISceneNodeVisitor
  • IRenderingView
  • DotVisitor

• ISceneNode (subject)

 Abstract factory (GoF 87)

• IGameFactory

 Observer (GoF 293)

• AbstractListener, Event, Listener is a fairly different implementation of the observer pattern functionality. It exists to solve the same problem but does so with a more flexible usage and keeps the type system intact.

 Composite (GoF 163)

• ISceneNode is a interface to scene graph nodes. Current concrete implementations are:
  • SceneNode
  • GeometryNode
  • TransformationNode
  • RenderStateNode
  • IRenderNode

 Singleton patten (GoF 127)

• IGameEngine