Question

Is it possible to force a static data member in inherited subclasses?

Here is my problem/thought process:

I want to make a “GameObject’ base class that all other objects inherit from to lend to polymorphism.

I want each inherited class to have a static data member list of vertexes to render the polygons. The exact process would be:

• Create object based on static list of vertexes
• Apply textures
• Rotate object based on instanced object’s rotation variables
• Transform object based on instanced object’s world coordinates

for all objects that inherit from Game Object, I’d like to guarantee that it has the static vertex list

Should I care if it has the list or not, or should I just care that it has a draw method (guaranteed by an interface iRender)?

Answer 1

If the GameObject is an interface, then you can enforce the existence of a static Property.

interface GameObject
{
     static List<vertex> vertices {get; set;}
     //other common code
};

Alternatively, you could just have the list of vertices as a protected data member in GameObject itself, and have the derived classes access it.