Question

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

public class PlayerControl : MonoBehaviour {

    public GameObject player;
    public GameObject arrow;
    private Vector3 a;
    private float angle;
    private Rigidbody2D rb2D;

    void Start()
    {

    }

    void Update () {
        if (Input.GetMouseButtonDown(0))
        {
            a = Input.mousePosition;
            Vector2 difference = a - player.transform.position;

            GameObject Aprefab = Instantiate(arrow) as GameObject;
            rb2D  = Aprefab.GetComponent<Rigidbody2D>();
            rb2D.AddForce(difference * 0.02f, ForceMode2D.Impulse);
        }
        angle = Mathf.Atan2(rb2D.velocity.y, rb2D.velocity.x);
        Aprefab.transform.localEulerAngles = new Vector3(0, 0, (angle * 180) / Mathf.PI);
    }
}

目前，我正在制作射箭游戏。我想在飞行时连续设置箭头方向。因此我需要从if块中访问“ Aprefab” GameObject。但是如何？

需要帮助

Answer 1

根据我的评论扩展：我已经

将拍摄内容重构为另一个功能
添加了一个列表arrows，以跟踪发射的所有箭头（Shoot()添加到其中）
使Update()遍历所有箭头并进行更新

我目前没有Unity，并且此代码是干式编码的，因此可能存在一些错误。另外，您有时会需要清理arrows列表中的内容。

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

public class PlayerControl : MonoBehaviour {

    public GameObject player;
    private List<GameObject> arrows = new List<GameObject>();

    void Start()
    {

    }

    void Update () {
        if (Input.GetMouseButtonDown(0))
        {
             Shoot();
        }
        foreach(var arrow in arrows) {
            var rb2D = Aprefab.GetComponent<Rigidbody2D>();
            var angle = Mathf.Atan2(rb2D.velocity.y, rb2D.velocity.x);
            arrow.transform.localEulerAngles = new Vector3(0, 0, (angle * 180) / Mathf.PI);
        }
    }

    private void Shoot() {
        var a = Input.mousePosition;
        var difference = a - player.transform.position;
        var Aprefab = Instantiate(arrow) as GameObject;
        var rb2D = Aprefab.GetComponent<Rigidbody2D>();
        rb2D.AddForce(difference * 0.02f, ForceMode2D.Impulse);
        arrows.Add(Aprefab);
   }
}

我如何从一个块中访问局部变量

1 个答案: