This recipe is a very important milestone in the architecture of scene graphs; needless to say, a scene graph is all about the hierarchical connectivity. In the current concept, we maintain the parent-child relationship among similar types of objects. This recipe contains two subrecipes:
The parent-child relationship is applicable to all renderable objects (derived from the
Model class) and logical engine entities, such as scenes, renderer, and so on. In the present scene graph architecture, this relationship is achieved through the
Object class. This class allows you to add/remove children ...