Call OnEnter after updating transitions and triggers

[shiena]

Trigger does not work within OnEnter. This is because OnEnter is called before activeTransitions and activeTriggerTransitions are updated, so the transition list and state do not match. Therefore, OnEnter should be called after activeTransitions and activeTriggerTransitions are updated.

using FSM;
using UnityEngine;

public class Foo : MonoBehaviour
{
    private StateMachine stateMachine;

    private void Awake()
    {
        stateMachine = new StateMachine(this);

        stateMachine.AddState("Run", new State());
        stateMachine.AddState("Jump", new State(onEnter: s =>
        {
            Debug.Log(stateMachine.ActiveStateName);
            stateMachine.Trigger("ToGround");
            Debug.Log(stateMachine.ActiveStateName); // expect "Ground" but it's "Run"
        }));
        stateMachine.AddState("Ground", new State());

        stateMachine.AddTriggerTransition("ToJump", new Transition("Run", "Jump"));
        stateMachine.AddTriggerTransition("ToGround", new Transition("Jump", "Ground")); // expect transition
        stateMachine.AddTriggerTransition("ToGround", new Transition("Run", "Run")); // actual transition

        stateMachine.SetStartState("Run");

        stateMachine.Init();
        stateMachine.Trigger("ToJump");
    }
}

Output before modification

Jump
Run

Output after modification

Jump
Ground

[Inspiaaa]

Thanks for the suggested reordering! I see it makes sense and works. I will merge this pull request. 👍