[SOLVED] C# Triggering a delay with Coroutine (IEnumerator)

[SiMULOiD]

Hi all,

I am trying to insert a 5 second delay, separating two Get.Components at the end of the below code.
Tried using the iEnumerator function, but not getting it to work.

Any ideas?

using UnityEngine;
using System.Collections;

public class OnTriggerStayTimerFrogDeactivate : MonoBehaviour
{
    public GameObject projectilePrefab;
    float t = 0;
    private bool canInstantiateProjectile = true;
   
   
   
       

  void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Fly")
            t = 0;
    }




    void OnTriggerStay(Collider other)
    {

        if (other.gameObject.tag == "Fly")
            t += Time.deltaTime;
        if (t > 0)
        {
            if (canInstantiateProjectile)
             
             
             
            {
               
         
                 
            GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = false;
           
           
                        }
       
               
       
       
 GetComponent<Animator>().CrossFade("Frog_Static", 0f);



// I'D LIKE TO INSERT A 5 SEC DELAY HERE



                  GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = true;
                   
                   GetComponent<Animator>().CrossFade("Frog_Hungry", 0f);      
                   
                   
                   
                 

                       }
    }

}

[system]

You’ll have to create a new method and use Unity’s “Invoke” method to invoke it.

See here: Unity - Scripting API: MonoBehaviour.Invoke

[SiMULOiD]

Is this because iEnumerator can’t be used?
Do I need to create a separate script and then invoke within the above?

[system]

No, you do not need to create a separate script. You can use a coroutine as well but using Invoke is simpler and easier.
Check the page I linked for an example on how to call a method with a delay using “Invoke”.

[SiMULOiD]

Sorry, I’m a little confused- that example was javascript and I’m working in C#.
Would you have any suggestions how to accomplish this in C#?
Thanks.

[SiMULOiD]

This is the IEnumerator script that I’m trying to use with the above:

IEnumerator Process()
{


//Wait 1 second
yield return StartCoroutine(Wait(1.0f));
//Do process stuff
}


IEnumerator Wait(float seconds)
{
yield return new WaitForSeconds(seconds);
}

[SiMULOiD]

Still stumped here. Any ideas?

[Holocene]

How is using invoke more efficient than a coroutine?

[LeftyRighty]

@Simuloid Visualization

Sorry, I’m a little confused- that example was javascript and I’m working in C#.
Would you have any suggestions how to accomplish this in C#?
Thanks.

there is a language toggle top right on pretty much all the scripting reference pages.

You’re going to run into issues any which way you do the delay since you are calling it from “OnTriggerStay” which is called every frame, so you will start a new coroutine, or invoke a new function every frame, which will all then run their course and not end up doing what you want.

Perhaps you could explain what you are trying to achieve (and I don’t expect an answer of “I’m trying to put in a delay”… :P)

[SiMULOiD]

Hi, thanks for your reply.
What I’m trying to do is insert a delay between the following:

     GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = false;
          
         
                       }
      
              
      
      
GetComponent<Animator>().CrossFade("Frog_Static", 0f);






// I'D LIKE TO INSERT A 5 SEC DELAY HERE.






                  GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = true;
                  
                   GetComponent<Animator>().CrossFade("Frog_Hungry", 0f);

[SiMULOiD]

Also, just saw the toggle on page- thanks!

[SiMULOiD]

Hi all,

Still not having much luck getting the invoke method to work with the above code.
How would I alter the below script to create a delay with the above?

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
public Rigidbody projectile;
void LaunchProjectile() {
Rigidbody instance = Instantiate(projectile);
instance.velocity = Random.insideUnitSphere * 5;
}
void Example() {
Invoke("LaunchProjectile", 2);
}
}

[nygren]

For both the Invoke and the coroutine approaches: place the code after your comment in a new method.

If you want to use Invoke: simply call the method using Invoke(“YourNewMethod”, 2);

If you want to use coroutines:

void OnTriggerStay(Collider other)
{
    // Beginning of your method here
    // ...

    GetComponent<Animator>().CrossFade("Frog_Static", 0f);
    // I'D LIKE TO INSERT A 5 SEC DELAY HERE
    StartCoroutine(WaitAndAnimate(5.0F));
}


IEnumerator WaitAndAnimate(float waitTime) {
    yield return new WaitForSeconds(waitTime);
    GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = true;
    GetComponent<Animator>().CrossFade("Frog_Hungry", 0f);
}

And as LeftyRighty said, make sure you add a check so you don’t start this delay timer every frame.

[SiMULOiD]

Thanks for your help, nygren!
I don’t think I need to use OnTriggerStay after all.
I’ve put the following together, but still throwing errors:

using UnityEngine;
using System.Collections;

public class OnTriggerStayTimerFrogDeactivate : MonoBehaviour
{
  
public GameObject projectilePrefab;
    float t = 0;
    private bool canInstantiateProjectile = true;

  
      

  void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Fly")
            t = 0;
    }


{
  GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = false;
  GetComponent<Animator>().CrossFade("Frog_Static", 0f);
    // I'D LIKE TO INSERT A 5 SEC DELAY HERE
  
    StartCoroutine(WaitAndAnimate(5.0F));
}


IEnumerator WaitAndAnimate(float waitTime) {
    yield return new WaitForSeconds(waitTime);
       GetComponent<Animator>().CrossFade("Frog_Hungry", 0f);
       GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = true;



}

[SiMULOiD]

This seems like it should work. Is it a syntax error?

[StarManta]

I don’t know, is it? You’re the one who can see your console, not us. You saying it’s “throwing errors”, but don’t tell us what those errors are.

[SiMULOiD]

I’m getting the following error for the above:

(26,1): error CS1519: Unexpected symbol `{’ in class, struct, or interface member declaration

[StarManta]

It looks like that } and the { after it shouldn’t be there. That’s all supposed to run in OnTriggerEnter, right?

[StarManta]

It looks like you may also be missing a } at the very end of the script.

May help to make MonoDevelop re-do all your indents; it should make curly bracket errors more obvious. Select everything, and hit alt-down or alt-up.

[SiMULOiD]

Thanks, StarManta.
I re-wrote a couple of lines and added in the OnTriggerStay- not sure if really needed.
Regardless, I’m still getting a parsing error and:

OnTriggerStayTimerFrogDeactivate2.cs(48,27): error CS1525: Unexpected symbol (', expecting )‘, ,', ;’, [', or =’

My current code:

using UnityEngine;
using System.Collections;
public class OnTriggerStayTimerFrogDeactivate2 : MonoBehaviour
{
   
public GameObject projectilePrefab;
float t = 0;
private bool canInstantiateProjectile = true;
       

void OnTriggerEnter(Collider other)
{
if (other.gameObject.tag == "Fly")
t = 0;
}




void OnTriggerStay(Collider other)
{

if (other.gameObject.tag == "Fly")
t += Time.deltaTime;
if (t > 0)
{
if (canInstantiateProjectile)

{
               

               
GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = false;
GetComponent<Animator>().CrossFade("Frog_Static", 0f);
           
           
}
         
// THIS IS WHERE I WANT TO HAVE 5 SEC DELAY
         
StartCoroutine(WaitAndAnimate(5.0F));
IEnumerator WaitAndAnimate(float waitTime) {
yield return new WaitForSeconds(waitTime);
         
   

GetComponent<Animator>().CrossFade("Frog_Hungry", 0f);
GetComponent<AI_FindObjectsWithtag_Transform_Fly>().enabled = true;



}}}}