CODE:

表示器.Update();  //アニメーションとかそういうのを進める
ゲーム進行処理.Update();  //こいつが仕事するのは表示側の進行と歩調を合わせなくてよい状態のときのみ

CODE:

表示器.Update();
if( 何かの条件 )表示器.Update();  //もう１回やるぜ！
ゲーム進行処理.Update();

CODE:

//Sequence of IDispItem.
class DispItemSeq : public IDispItem
{
public:
	DispItemSeq(){}
	DispItemSeq( const DispItemSeq & ) = delete;
	DispItemSeq &operator=( const DispItemSeq & ) = delete;
	virtual ~DispItemSeq(){}

public:
	//Add to the tail of sequence.
	//When the added item's Finished() returns true, the item would be automatically popped from this sequence.
	void PushDispItem( std::shared_ptr<IDispItem> spItem ){	m_Items.push( spItem );	}

public:	//IDispItem implementation
	virtual bool Finished() const override {	return m_Items.empty();	}

	virtual bool Update() override
	{
		//Handling the fact that item's Finish() may return true at the first call.
		while( !m_Items.empty()  &&  m_Items.front()->Finished() ){	m_Items.pop();	}

		bool NeedToRedraw = false;
		if( !m_Items.empty() )
		{
			NeedToRedraw = m_Items.front()->Update();
			if( m_Items.front()->Finished() ){	m_Items.pop();	}
		}
		return NeedToRedraw;
	}

	virtual void Paint( HDC hdc, int W, int H ) const override
	{
		if( !m_Items.empty() ){	m_Items.front()->Paint( hdc,W,H );	}
	}
protected:
	std::queue< std::shared_ptr<IDispItem> > m_Items;
};