public void AddTransition(RoleTransition trans, RoleStateID id)
{
//验证每个参数是否合法
if (trans == RoleTransition.NullTransition)
{
Debug.LogError("FSMState ERROR: NullTransition is not allowed for a real transition");
return;
}
if (id == RoleStateID.NullStateID)
{
Debug.LogError("FSMState ERROR: NullStateID is not allowed for a real ID");
return;
}
//要知道这是一个确定的有限状态机（每个状态后对应一种状态，而不能产生分支）
//检查当前的过渡是否已经在字典中了
if (map.ContainsKey(trans))
{
Debug.LogError("FSMState ERROR: State " + stateID.ToString() + " already has transition " + trans.ToString() +
"Impossible to assign to another state");
return;
}
map.Add(trans, id);
}
public async Task <RoleTransition> Update(RoleTransition roleTransition)
{
_context.Entry(roleTransition);
await _context.SaveChangesAsync();
return(roleTransition);
}
public async Task <RoleTransition> Add(RoleTransition roleTransition)
{
_context.Transitions.Add(roleTransition);
await _context.SaveChangesAsync();
return(roleTransition);
}
//该方法用来改变有限状态机的状体，有限状态机基于当前的状态和通过的过渡状态。如果当前的状态没有用来通过的过度状态，则会抛出错误
public void SetTransition(RoleTransition t, Entity entity)
{
if (null != Fsm)
{
Fsm.SwitchTransition(t, entity);
}
}
/// <summary>
/// 该方法在该状态接收到一个过渡时返回状态机需要成为的新状态
/// </summary>
public RoleStateID GetOutputState(RoleTransition trans)
{
if (map.ContainsKey(trans))
{
return(map[trans]);
}
return(RoleStateID.NullStateID);
}
/// <summary>
/// 这个方法用来在状态字典中删除transition-state对儿
/// 如果过渡并不存在于状态字典中，那么将会打印出一个错误
/// </summary>
public void DeleteTransition(RoleTransition trans)
{
if (trans == RoleTransition.NullTransition)
{
Debug.LogError("FSMState ERROR: NullTransition is not allowed");
return;
}
//再删除之前确认该键值对是否存在于状态字典中（键值对集合）
if (map.ContainsKey(trans))
{
map.Remove(trans);
return;
}
Debug.LogError("FSMState ERROR: Transition " + trans.ToString() + " passed to " + stateID.ToString() +
" was not on the state's transition list");
}
/// <summary>
/// 状态改变
/// </summary>
public void SwitchTransition(RoleTransition trans, Entity entity)
{
//在改变当前状态前检测NullTransition
if (trans == RoleTransition.NullTransition)
{
Debug.LogError("FSM ERROR: NullTransition is not allowed for a real transition");
return;
}
//在改变当前状态前检测当前状态是否可作为过渡的参数
RoleStateID id = CurrentState.GetOutputState(trans);
if (id == RoleStateID.NullStateID)
{
Debug.LogError("FSM ERROR: State " + CurrentStateID.ToString() + " does not have a target state " +
" for transition " + trans.ToString());
return;
}
if (id == CurrentStateID)
{
//Debug.LogError("FSM ERROR:Current State is same state " + CurrentStateID.ToString());
return;
}
//更新当前的状态个和状态编号
CurrentStateID = id;
for (int i = 0; i < states.Count; i++)
{
if (states[i].ID == CurrentStateID)
{
//离开旧状态执行方法
CurrentState.OnExit(entity);
CurrentState = states[i];
//进入新的状态
CurrentState.OnEnter(entity);
break;
}
}
}
