How do I make dialogue trigger?

I am trying to create a state where, when a player walks through a collider, dialogue box appears. it could be string of dialogue box playing one after another or just a single one which can either disappear after few seconds of being active or by pressing say "Enter" Key.
How would I make such mechanic? Thank you.

 

Use a trigger collider. See Colliders as Triggers.

Use Unity UI. See UI.

You might want to add a small script to the collider GameObject that detects when the player enters the trigger. Something like:

Code (csharp):

1. using UnityEngine;
2. using UnityEngine.Events;
3.  
4. public class TriggerEvent : MonoBehaviour
5. {
6.     public UnityEvent onTriggerEnter = new UnityEvent();
7.     public UnityEvent onTriggerExit = new UnityEvent();
8.  
9.     void OnTriggerEnter(Collider other)
10.     {
11.         if (other.CompareTag("Player")) onTriggerEnter.Invoke();
12.     }
13.  
14.     void OnTriggerExit(Collider other)
15.     {
16.         if (other.CompareTag("Player")) onTriggerExit.Invoke();
17.     }
18. }

This will add two UnityEvents that you can hook up in the inspector -- for example to activate a dialogue box GameObject.

You can use a coroutine to hide it after a time or to show a series of boxes in sequence.

 

Thanks alot i'm trying it