游戏状态机-有限模型1
该模型也是最简单的状态机模型
通过代理命令，解决互斥的状态问题，如果某一状态需要捕获上一个状态，那么这么模型就要稍加修改，
一直很机智的做法是利用状态stack 来记录
class ObjectState
{
public:
virtual void update(void*host) = 0;
virtual void onEnter(void*);
virtual void onExit(void*);
std::string getStateName(){ return _name; }
protected:
std::string _name;
};
class Hero
{
public:
void input(int c);
void update();
private:
ObjectState*_state;
};
class HeroState :public ObjectState
{
public:
virtual void update(void*host)final
{
this->update(static_cast<Hero*>(host));
}
virtual void update(Hero*host) = 0;
};
class JumpState:public HeroState
{
public:
virtual void update(Hero*host)override
{
cout << __FUNCTION__ << endl;
}
};
class IdleState :public HeroState
{
public:
virtual void update(Hero*host)override
{
cout << __FUNCTION__ << endl;
}
};
void Hero::input(int c)
{
if (c == 'W') _state = new IdleState;
if (c == 'S') _state = new JumpState;
}
void Hero:: update()
{
this->_state->update(this);
}
int main(int argc, char *argv[])
{
Hero player;
while (true)
{
// Sleep(100);
char c= getch();
player.input(c);
player.update();
}
system("pause");
return 0;
}