Laser Door, Re-activating after a time using a co-routine, but it isn't working?

Scripting
1

I am still new to Unity and programming in general. I am having a bit of trouble using code to set a laser door back to active.

I have a laser gameObject sitting beside an “emitter”. Player shoots the “laser” and it deactivates it. The box collider and script are both on the emitter, and only the laserdoor is deactivated. I am using a co-routine as a timer, but its never re-activating the laser. I am hoping someone can find the error in my code. Thank you in advanced.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LDActive : MonoBehaviour
{

    public GameObject laserdoor;
    public float openTime = 3;

    private bool open = false;

    void Start()
    {
        StartCoroutine(DoorOpen());
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("Bolt"))
        {
            laserdoor.gameObject.SetActive(false);
            open = true;
        }
    }

    IEnumerator DoorOpen()
    {
        if (open == true)
        {
            yield return new WaitForSeconds(openTime);
            laserdoor.gameObject.SetActive(true);
            open = false;
        }
      
    }
}
2

Start only runs once when the object is enabled. So if you turn on this object, start will run, your coroutine will run, then it will never activate again. Which means if open is false when the coroutine runs, it isn’t going to do anything.

You probably just want to start the coroutine within your OnTriggerEnter2d if statement.

3

That did it, thank you.