koobas.hobune.stream
Coroutine Chain of Events
I have functionality in my game where an action has several steps in order to be completed.
I want it to perform this sequence:
Click button X to start the chain of events. (Start coroutine #1)
Click button to complete Step 1.
Click button to complete Step 2.
Click button to complete the process.
Here is a sketch I drew up to try to convey what I mean: 
'Do Something' is the normal operation of the object, and should be skipped completely when in the middle of this multi-step process.
I tried nesting co-routines but clearly did something wrong, what happens now is that all of the steps complete on the first click.
Thanks
Hey Avidesk:
I used this http://answers.unity3d.com/questions/25550/chaining-actions-over-time-and-in-order.html to came up with a chained event manager script. Basically its a monobehavior that has a list of routine names.
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class ChainedEventsManager : MonoBehaviour {
public int EventId;
public List<string> ChainedEvents;
public bool IsExecuting = false;
//
public void NextTask(int nextId)
{
EventId = nextId;
//audio.Play();
}
void Update()
{
if(EventId >= 0 && !IsExecuting)
{
IsExecuting = true;
//Execute Next chained action
SendMessageUpwards(ChainedEvents[EventId]);
//if is the last item on the chain, set the event id to -1 so the cycle is not hit anymore
if (EventId == ChainedEvents.Count)
{
EventId = -1;
}
}
}
}
Then I used the ChainedEvents list to set up the names of the functions that I want to execute on the correct order. So lets say the order if chained events list is ["FunctionA", "FunctionB"] I have something like this:
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class ChainedEventsPuzzle: MonoBehaviour {
private ChainedEventsManager eventManager;
void Start()
{
eventManager = transform.GetComponent<ChainedEventsManager>();
}
}
void StartChainedEvents()
{
//Set the id to 0, so the chain starts
eventManager.NextTask(0);
}
void FunctionA()
{
//Do Function A
eventManager.NextTask(1);
eventManager.IsExecuting = false;
}
//Async function
void FunctionB()
{
//Do function B
//Call execution Async
StartCoroutine(DoSomethingAsync();
}
IEnumerator DoSomethingAsync()
{
//Do Something
yield return new WaitForSeconds(SecondsToWait); //I use this to wait an animation to end
//Break the chained events
eventManager.NextTask(-1);
eventManager.IsExecuting = false;
}
}
At anytime you could break the event chain by executing eventManager.Nextask(-1). I guess you could set your own flags for the buttons to know when the chainmanager should continue with the next chained even.
Hope it helps.
