《Carto》實作對話系統08-當條件滿足時，不用按按鍵，可以直接觸發的對話

改善原因

而有一些對話，設計者可能會希望玩家不用按任何按鍵，只要走到能對話的位置，就會自動觸發對話，可能藉此讓玩家之到一些他必須要知道的事情。

Unity實作

Dialogue

在Dialogue腳本宣告一個bool型別的變數，用來決定此Dialogue是不是一個要直接觸發的對話。

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

[System.Serializable]
public class Dialogue
{
    public string dialogueName;
    
    public bool isCompelete = false;
    
    public bool directTrigger = false;
    
    public List<Condition> taskConditions;

    [Space(15)]
    public List<Sentence> sentences;

    public UnityEvent finishEvent;
   
    public void InvokeFinishEvent()
    {
        finishEvent.Invoke();
    }
}

TalkBehav

在TalkBehav腳本裡，當取得Dialogue後，判斷是不是要直接觸發的對話，如果是的話就開始對話。

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

public class TalkBehav : MonoBehaviour
{
    private RoleObj roleObj;
    private DialoguesManager dialoguesManager;
    private SpriteRenderer spR;

    private void Start()
    {
        roleObj = GetComponent<RoleObj>();

        dialoguesManager = FindObjectOfType<DialoguesManager>();
        spR = GetComponent<SpriteRenderer>();
    }

    private void Update()
    {
        InvokeDialogue();
        FaceTheSpeakerInDialogue();
    }

    /// <summary>
    ///啟動對話
    /// </summary>
    private void InvokeDialogue()
    {
        if (isInDialogueTrigger && dialoguesManager.IsDialogueCompelete)
        {
            dialoguesManager.GetDialogue();

            if (Input.GetKeyDown(KeyCode.Space) || dialoguesManager.Dialogue.directTrigger)//判斷對話是不是直接觸發的
            {
                dialoguesManager.StartDialogue();
            }
        }
    }

    /// <summary>
    ///讓角色面對在對話的人
    /// </summary>
    private void FaceTheSpeakerInDialogue()
    {
        if (dialoguesManager.IsDialogueCompelete == false)
        {
            Vector3 speakerPosition = dialoguesManager.DialogueRolesCenterPosition;

            if (speakerPosition.x > transform.position.x)
            {
                spR.flipX = false;
            }
            else if (speakerPosition.x < transform.position.x)
            {
                spR.flipX = true;
            }
        }
    }

    private bool isInDialogueTrigger = false;

    //當進入到勾選Trigger的Collider的瞬間會執行的方法
    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.layer == LayerMask.NameToLayer("Area"))
        //如果碰到的 勾選Trigger的Collider的物件 Layer是Area
        {
            AreaNumKeeper.currentNum = other.GetComponent<Area>().num;
            Debug.Log(AreaNumKeeper.currentNum);
        }
        else if (other.gameObject.layer == LayerMask.NameToLayer("DialogueTrigger"))
        {
            isInDialogueTrigger = true;
            ShowTheHint();
        }
    }

    /// <summary>
    ///顯示提示訊息
    /// </summary>
    public void ShowTheHint()
    {
        roleObj.BubbleScaleUp("...");
    }

    //當離開勾選Trigger的Collider的瞬間會執行的方法
    private void OnTriggerExit2D(Collider2D other)
    {
        if (other.gameObject.layer == LayerMask.NameToLayer("Area"))
        {
            if (AreaNumKeeper.currentNum == other.GetComponent<Area>().num)
            {
                AreaNumKeeper.currentNum = -1;
                Debug.Log(AreaNumKeeper.currentNum);
            }
        }
        else if (other.gameObject.layer == LayerMask.NameToLayer("DialogueTrigger"))
        {
            isInDialogueTrigger = false;
            roleObj.BubbleScaleDown();
        }
    }
}

結論

到這裡，這次的對話系統教學文章就告一段落了。

希望這篇文章能讓正在閱讀的你，了解如何使用Unity實作對話系統。

有問題、有興趣交流或想繼續學習的人，可以在本篇或每篇文章的留言區留言～

系列文章

《Carto》實作對話系統01-前言
《Carto》實作對話系統02-建立遊戲所需物件
《Carto》實作對話系統03-建構程式
《Carto》實作對話系統04-把腳本加到對應的物件上
《Carto》實作對話系統05-當TextMeshPro沒有辦法顯示中文
《Carto》實作對話系統06-改善對話系統的操作介面
《Carto》實作對話系統07-加入對話結束後會觸發的事件

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