public void Start(Type stateType)
{
if (IsRunning)
{
throw new GameFrameworkException("FSM is running, can not start again.");
}
if (stateType == null)
{
throw new GameFrameworkException("State type is invalid.");
}
if (!typeof(AFsmState<T>).IsAssignableFrom(stateType))
{
throw new GameFrameworkException(string.Format("State type '{0}' is invalid.", stateType.FullName));
}
AFsmState<T> state = GetState(stateType);
if (state == null)
{
throw new GameFrameworkException(string.Format("FSM '{0}' can not start state '{1}' which is not exist.", state, stateType.FullName));
}
m_CurrentStateTime = 0f;
m_CurrentState = state;
m_CurrentState.OnEnter(this);
}
public TState GetState<TState>() where TState : AFsmState<T>
{
AFsmState<T> state = null;
if (m_States.TryGetValue(typeof(TState), out state))
{
return (TState)state;
}
return null;
}
public AFsm(T owner)
{
if (owner == null)
{
throw new GameFrameworkException("FSM owner is invalid.");
}
m_Owner = owner;
m_States = new Dictionary<Type, AFsmState<T>>();
m_Datas = new Dictionary<string, Variable>();
m_CurrentStateTime = 0f;
m_CurrentState = null;
m_IsDestroyed = false;
}
/// <summary>
/// 开始有限状态机。
/// </summary>
/// <typeparam name="TState">要开始的有限状态机状态类型。</typeparam>
public void Start<TState>() where TState : AFsmState<T>
{
if (IsRunning)
{
throw new GameFrameworkException("FSM is running, can not start again.");
}
AFsmState<T> state = GetState<TState>();
if (state == null)
{
throw new GameFrameworkException(string.Format($"FSM can not start state {typeof(TState).FullName} which is not exist."));
}
m_CurrentStateTime = 0f;
m_CurrentState = state;
m_CurrentState.OnEnter(this);
}
public void ChangeState(Type stateType)
{
if (m_CurrentState == null)
{
throw new GameFrameworkException("Current state is invalid.");
}
AFsmState<T> state = GetState(stateType);
if (state == null)
{
throw new GameFrameworkException(string.Format("FSM '{0}' can not change state to '{1}' which is not exist.", state, stateType.FullName));
}
m_CurrentState.OnLeave(this);
m_CurrentStateTime = 0f;
m_CurrentState = state;
m_CurrentState.OnEnter(this);
}
/// <summary>
/// 关闭并清理有限状态机。
/// </summary>
public virtual void ShutDown()
{
if (m_CurrentState != null)
{
m_CurrentState.OnLeave(this);
m_CurrentState = null;
m_CurrentStateTime = 0f;
}
foreach (var state in m_States.Values)
{
state.OnDestroy(this);
}
m_States.Clear();
m_Datas.Clear();
m_IsDestroyed = true;
}
public AFsmState<T> GetState(Type stateType)
{
if (stateType == null)
{
throw new GameFrameworkException("State type is invalid.");
}
if (!typeof(AFsmState<T>).IsAssignableFrom(stateType))
{
throw new GameFrameworkException(string.Format("State type '{0}' is invalid.", stateType.FullName));
}
AFsmState<T> state = null;
if (m_States.TryGetValue(stateType, out state))
{
return state;
}
return null;
}