/// <summary>
/// 查找并切换对应id的状态
/// </summary>
/// <param name="stateId"></param>
public void ChangeState(SoldierStateID stateId)
{
if (stateId == SoldierStateID.NullState)
{
Debug.LogError("SoldierFSM ERROR: 不允许切换空状态");
}
//遍历此状态容器
foreach (SoldierFSMState state in _states)
{
if (state.StateID == stateId)
{
if (null != _currentState)
{
_currentState.DoBeforeLeaving(this);
}
// 设置前置状态
SourceStateID = _currentStateId;
//只允许在这里切换状态
_currentState = state;
_currentStateId = state.StateID;
//Debug.Log("执行状态切换-------------------" + state.StateID);
if (null != _currentState)
{
_currentState.DoBeforeEntering(this);
}
// TODO 同步状态切换操作
// 同步数据包括 状态, FSM数据, 单位属性, 单位位置, 单位方向, 目标点列表(路径), 目标(技能/攻击目标)
break;
}
}
}
/// <summary>
/// This method places new states inside the FSM,
/// or prints an ERROR message if the state was already inside the List.
/// First state added is also the initial state.
/// </summary>
public void AddState(SoldierFSMState s)
{
// Check for Null reference before deleting
if (s == null)
{
Debug.LogError("SoldierFSM ERROR: Null reference is not allowed");
}
// First State inserted is also the Initial state,
// the state the machine is in when the simulation begins
if (states.Count == 0)
{
states.Add(s);
currentState = s;
currentStateID = s.ID;
return;
}
// Add the state to the List if it's not inside it
foreach (SoldierFSMState state in states)
{
if (state.ID == s.ID)
{
Debug.LogError("SoldierFSM ERROR: Impossible to add state " + s.ID.ToString() +
" because state has already been added");
return;
}
}
states.Add(s);
}
/// <summary>
/// 增加状态转换对 第一次添加的状态是默认状态
/// </summary>
/// <param name="s"></param>
public void AddState(SoldierFSMState s)
{
//_currentState = _states.Find((e) => e.StateID == s.StateID);
if (s == null)
{
Debug.LogError("SoldierFSM ERROR: Null reference is not allowed");
return;
}
if (_states.Count == 0)
{
_states.Add(s);
ChangeState(s.StateID);
return;
}
//排除相同的状态
foreach (SoldierFSMState state in _states)
{
if (state.StateID == s.StateID)
{
Debug.LogError("SoldierFSM ERROR: Impossible to add state " + s.StateID.ToString() +
" because state has already been added");
return;
}
}
_states.Add(s);
}
/// <summary>
/// This method tries to change the state the FSM is in based on
/// the current state and the transition passed. If current state
/// doesn't have a target state for the transition passed,
/// an ERROR message is printed.
/// </summary>
public void PerformTransition(SoldierTransition trans)
{
// Check for NullTransition before changing the current state
if (trans == SoldierTransition.NullTransition)
{
Debug.LogError("SoldierFSM ERROR: NullTransition is not allowed for a real transition");
return;
}
// Check if the currentState has the transition passed as argument
SoldierStateID id = currentState.GetOutputState(trans);
if (id == SoldierStateID.NullStateID)
{
Debug.LogError("SoldierFSM ERROR: State " + currentStateID.ToString() + " does not have a target state " +
" for transition " + trans.ToString());
return;
}
// Update the currentStateID and currentState
currentStateID = id;
foreach (SoldierFSMState state in states)
{
if (state.ID == currentStateID)
{
// Do the post processing of the state before setting the new one
currentState.DoBeforeLeaving();
currentState = state;
// Reset the state to its desired condition before it can reason or act
currentState.DoBeforeEntering();
break;
}
}
} // PerformTransition()
