/// <summary>
/// Add a state using reflection to retrieve the approriate methods on the Entity.
/// For example, a key with a value of "Idle" will retrieve the methods "EnterIdle" "UpdateIdle" and "ExitIdle" automatically.
/// </summary>
/// <param name="key">The key to reference the State with.</param>
public void AddState(TState key, Entity e = null)
{
if (e == null)
{
e = Entity; // Use the Component's Entity if no entity specified.
}
if (states.ContainsKey(key))
{
return; // Dont add duplicate states.
}
var state = new State();
var name = key.ToString();
//Using reflection to find all the appropriate functions!
MethodInfo mi;
mi = e.GetType().GetMethod("Enter" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (mi == null)
{
e.GetType().GetMethod("Enter" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
}
if (mi != null)
{
state.OnEnter = (Action)Delegate.CreateDelegate(typeof(Action), e, mi);
}
mi = e.GetType().GetMethod("Update" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (mi == null)
{
e.GetType().GetMethod("Update" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
}
if (mi != null)
{
state.OnUpdate = (Action)Delegate.CreateDelegate(typeof(Action), e, mi);
}
mi = e.GetType().GetMethod("Exit" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (mi == null)
{
e.GetType().GetMethod("Exit" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
}
if (mi != null)
{
state.OnExit = (Action)Delegate.CreateDelegate(typeof(Action), e, mi);
}
states.Add(key, state);
}
/// <summary>
/// Add a state and automatically grab functions by their name.
/// </summary>
/// <param name="names">The common name in all the functions, like "Walking" in "UpdateWalking" "EnterWalking" and "ExitWalking"</param>
/// <returns>The id to refer to the state.</returns>
public void AddState(params string[] names)
{
foreach (var name in names)
{
if (Entity == null)
{
throw new ArgumentException("State Machine must be Added to an Entity first!");
}
var state = new State();
//Using reflection to find all the appropriate functions!
MethodInfo mi;
mi = Entity.GetType().GetMethod("Enter" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (mi != null)
{
state.OnEnter = (Action)Delegate.CreateDelegate(typeof(Action), Entity, mi);
}
mi = Entity.GetType().GetMethod("Update" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (mi != null)
{
state.OnUpdate = (Action)Delegate.CreateDelegate(typeof(Action), Entity, mi);
}
mi = Entity.GetType().GetMethod("Exit" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
if (mi != null)
{
state.OnExit = (Action)Delegate.CreateDelegate(typeof(Action), Entity, mi);
}
//Using reflection to assign the id to the right property
FieldInfo fi;
fi = Entity.GetType().GetField("state" + name, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public | BindingFlags.FlattenHierarchy);
fi.SetValue(Entity, nextStateId);
AddState(state);
}
}
