Evolution System class

system.h

class System {
public:
    System();
    ~System();
    
    // Add a new entity to this system by its component
    void AddComponent(Component* component);
    
    // Remove an entity by its component
    void RemoveComponent(Component* component);
    
    // Initialize or shut down the system
    virtual void Initialize();
    virtual void Shutdown();
    
    // Run an update function, passing in the time since the last update in seconds
    virtual void Update(float difference);
    
protected:
    // An array/list of components attached to this system
    Component** m_components;
    
    // The total size of the components array to loop over
    unsigned int m_bucketSize;
    
    // Singleton instance of the system
    static System* m_instance;
};