Scriptum/Assets/NPCDialogue.cs

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

public class NPCDialogue : MonoBehaviour
{

    public Text nameText;
    public Text dialogueText;
    public Dialogue dialogue;

    private Queue<string> sentences;
    public GameObject Panel;

    bool triggered = false;

    void Start()
    {
        sentences = new Queue<string>();

    }

    public void TriggerDialogue()
    {
        StartDialogue(dialogue);
    }

    void OnTriggerExit2D(Collider2D collision)
    {
        if (Panel != null)
        {

            Panel.SetActive(false);
        }
        triggered = false;
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.tag == "Player")
        {
            triggered = true;
        }
    }

    void Update()
    {
        if (triggered)
        {
            if (Input.GetKeyDown(KeyCode.E))
            {
                if (Panel != null)
                {
                    Panel.SetActive(true);
                }
                StartDialogue(dialogue);
            }
        }
    }


    public void StartDialogue(Dialogue dialogue)
    { 
        nameText.text = dialogue.name;

        sentences.Clear();

        foreach(string sentence in dialogue.sentences)
        {
            sentences.Enqueue(sentence);
        }

        DisplayNextSentence();
    }

    public void DisplayNextSentence()
    {
        if (sentences.Count == 0)
        {
            EndDialogue();
            return;
        }

        string sentence = sentences.Dequeue();
        dialogueText.text = sentence;
    }

    void EndDialogue()
    {
        Panel.SetActive(false);
    }
}