private void BeginLoadingState(NavState destination)
{
CurrentState = destination;
CurrentState.StateMachine.SetActiveChild(CurrentState);
CurrentState.StartLoading();
UpdateCurrentState();
}
public void Initialize(NavStateContext context, NavState parent)
{
m_context = context;
m_state = parent;
Initialize();
}
public static string CalculatePath(NavState state)
{
s_builder.Clear();
s_scratchList.Clear();
while (true)
{
s_scratchList.Add(state);
if (state.IsRoot)
{
break;
}
state = state.StateMachine;
}
s_scratchList.Reverse();
s_builder.Append(s_scratchList[0].Name);
for (var index = 1; index < s_scratchList.Count; index++)
{
s_builder.Append("/");
s_builder.Append(s_scratchList[index].Name);
}
return(s_builder.ToString());
}
private void EnqueueStatesToLeave(NavState untilParent)
{
NavState activeState = CurrentState;
while (activeState != untilParent)
{
m_navigationPlan.AddStateToLeave(activeState);
activeState = activeState.StateMachine;
}
}
private void StartUnloadingStatesToLeave()
{
List <NavState> statesToLeave = m_navigationPlan.StatesToLeave;
int numStatesToLeave = statesToLeave.Count;
for (int i = 0; i < numStatesToLeave; ++i)
{
NavState stateToLeave = statesToLeave[i];
stateToLeave.StartUnloading();
}
}
public void NavStateModeChanged(NavState state)
{
if (m_enableDebugLogging)
{
m_logger.Info($"{state.Path} -> {state.Mode}");
}
#if UNITY_EDITOR
UnityEditor.EditorApplication.RepaintHierarchyWindow();
#endif
}
private void LeaveStates()
{
List <NavState> statesToLeave = m_navigationPlan.StatesToLeave;
int numStatesToLeave = statesToLeave.Count;
for (int i = 0; i < numStatesToLeave; ++i)
{
NavState stateToLeave = statesToLeave[i];
stateToLeave.OnStateLeave();
}
}
public void HandleTransition(string transition)
{
NavState targetState = null;
if (Navigator.TryGetStateForTransition(transition, ref targetState))
{
TransitionTo(targetState);
}
else
{
m_logger.Error($"Failed to find transition: {transition} [{Active.Path}]");
}
}
private void InternalNavigateTo(NavState destination)
{
// TODO: Handle where navigation is requested while a state is loading.
UnityEngine.Debug.Assert(m_navigationPlan.IsComplete, "Navigation was requested before navigation finished!");
m_navigationPlan.Reset();
m_navigationPlan.OriginState = CurrentState;
NavStateUtils.GetParents(destination, m_parentsScratch);
m_parentsScratch.Reverse();
NavStateMachine parentToEnterFrom = null;
// Determine the states to be entered
for (var index = 0; index < m_parentsScratch.Count; index++)
{
NavStateMachine parent = m_parentsScratch[index];
if (parentToEnterFrom == null && NavStateUtils.NeedsToBeEntered(parent))
{
parentToEnterFrom = parent;
}
if (parentToEnterFrom != null)
{
m_navigationPlan.AddStateToEnter(parent);
}
}
m_navigationPlan.AddStateToEnter(destination);
// Check if the destination is a state machine and repeatedly add the default state until we get to a leaf.
if (!AddDefaultStatesToEnter(destination))
{
return;
}
parentToEnterFrom = parentToEnterFrom == null ? destination.StateMachine : parentToEnterFrom.StateMachine;
// Determine the states that will be exited
EnqueueStatesToLeave(parentToEnterFrom);
m_navigationPlan.NavigationStarted();
// Begin the unloading process
StartUnloadingStatesToLeave();
UpdateCurrentState();
}
private void OnCurrentStateUnloadingFinished()
{
m_navigationPlan.StateUnloaded();
if (m_navigationPlan.CurrentStateToUnload() != null)
{
CurrentState = m_navigationPlan.CurrentStateToUnload();
UpdateCurrentState(); // This will check whether it is ready to finalize unloading and continue from there.
}
else
{
// All states that need to be unloaded have been. Now we can exit them.
LeaveStates();
BeginLoadingState(m_navigationPlan.CurrentStateToLoad());
}
}
/// <summary>
/// Checks if the given state is a StateMachine and adds the StateMachine's default state.
/// </summary>
private bool AddDefaultStatesToEnter(NavState destination)
{
var destinationStateMachine = destination as NavStateMachine;
while (destinationStateMachine != null)
{
var defaultChild = destinationStateMachine.DefaultState;
if (defaultChild == null)
{
m_logger.Error($"Failed to navigate to next state. {destinationStateMachine.Path} is missing the default state");
return(false);
}
m_navigationPlan.AddStateToEnter(defaultChild);
destinationStateMachine = defaultChild as NavStateMachine;
}
return(true);
}
public static void GetParents(NavState state, List <NavStateMachine> parentsOut)
{
parentsOut.Clear();
if (state == null)
{
return;
}
var parent = state.StateMachine;
while (true)
{
parentsOut.Add(parent);
parent = parent.StateMachine;
if (parent.IsRoot)
{
break;
}
}
}
public static bool NeedsToBeEntered(NavState state)
{
return(state.Mode == StateMode.Inactive || state.NeedsReenter());
}
public static NavState[] GetChildren(NavState state)
{
return(GetComponentsInChildrenWithoutParent(state.gameObject));
}
/// <summary>
/// The Navigator will set the active child during navigation
/// </summary>
public void SetActiveChild(NavState state)
{
m_activeChild = state;
}
public void Navigate(NavState targetState)
{
InternalNavigateTo(targetState);
}
public bool CanProcessTransition(string transition)
{
NavState targetState = null;
return(m_navigationPlan.IsComplete && TryGetStateForTransition(transition, ref targetState));
}
public void TransitionTo(NavState targetState)
{
LastActiveState = Active;
Navigator.Navigate(targetState);
}
public void AddStateToEnter(NavState navState)
{
StatesToEnter.Add(navState);
}
public void AddStateToLeave(NavState navState)
{
StatesToLeave.Add(navState);
}
public bool TryGetStateForTransition(string transition, ref NavState targetState)
{
return(CurrentState.TryGetStateForTransition(transition, ref targetState));
}
