Unity中如何在2D中指向特定物体的中心坐标？

Question

提问前声明我是初学者

如有不妥之处，敬请谅解

我会用图片和代码来说明我要实现的东西

下面是图片。

如上图所示，我已经实现了在 5 到 7 个随机位置之间生成的当前导弹（预制件）。

这是相关代码：

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

class MissileAnimation : WordGameSingleton<MissileAnimation>
{
    private int missile_num = 0; 
    public List<GameObject> missile_list = new List<GameObject>();
    float fixedPosition_z = 1f; 
    public GameObject missile_parent_area = null; 

    protected override void Start()
    {
        StartCoroutine(fireMissiles());

        missile_parent_area = new GameObject();
        missile_parent_area.name = "MissileAnimation"; 
    }

    protected override void Update()
    {
    }

    private IEnumerator fireMissiles()
    {
        yield return new WaitForSeconds(0.3f);


        missile_parent_area.transform.SetParent(this.gameObject.transform);
        missile_parent_area.transform.localScale = new Vector3(1f, 1f, 1f);
        missile_parent_area.transform.localPosition = new Vector3(this.gameObject.transform.position.x, this.gameObject.transform.position.y, fixedPosition_z);
        //GameObject planet_position = GameObject.Find("Center_Planet") as GameObject;position.x
        //float planet_position_x = planet_position.transform.position.x;
        //float planet_position_y = planet_position.transform.position.y;

        missile_num = UnityEngine.Random.Range(5, 7); // Generate between 5 and 7EA missiles
        int origin_width = 50;
        int origin_height = 100;

        for (int i = 0; i < missile_num; ++i)
        {
            // Generate missile position random position
            float angle = Mathf.Round(UnityEngine.Random.Range(90f, 180f) + 45f);
            float randomPosition_x = Mathf.Cos(angle) * (Screen.width - origin_width) / 2; 
            float randomPosition_y = Mathf.Sin(angle) * (Screen.height - origin_height) / 2;

            // Center view of the Planet
            // How do I implement this part?

            // Create a missile prefab
            GameObject missile_prefab_load = Resources.Load("Prefabs/Object/Missile") as GameObject;
            GameObject missile_prefab_instantiate = Instantiate(missile_prefab_load, this.gameObject.transform.position, Quaternion.identity) as GameObject;
            //    MonoBehaviour.Instantiate(Resources.Load("Prefabs/Object/Missile"), new Vector3(0f, 0f, 0f), Quaternion.identity) as GameObject;
            missile_prefab_instantiate.name = "missile_" + i;
            missile_prefab_instantiate.transform.SetParent(missile_parent_area.transform);
            missile_prefab_instantiate.transform.localPosition = new Vector3(randomPosition_x, randomPosition_y, 0f);
            missile_prefab_instantiate.transform.localScale = new Vector3(2.0f , 2.0f, 2.0f);
            missile_list.Add(missile_prefab_instantiate);


            // Speed of missile flight
            float speed = UnityEngine.Random.Range(1.0f, 1.4f);

            // Go Missile
            LeanTween.moveLocal(missile_prefab_instantiate, new Vector3(0f, 0f, 0f), speed).setEase(LeanTweenType.easeInCubic).setOnUpdate(crashPlanet).setOnUpdateParam(missile_prefab_instantiate);
            // LeanTween.moveLocal(GameObject , Vector , time:float)
            // setOnUpdate : <float,Object> 

            // Reduced size as the rocket fires.
            LeanTween.scale(missile_prefab_instantiate, new Vector3(1.0f, 1.0f, 1.0f), speed).setEase(LeanTweenType.easeInCubic);
        }
        yield return new WaitForSeconds(0.9f);

        Vector3 position = this.gameObject.transform.localPosition;
        this.transform.position = new Vector3(position.x, 0f, position.z);
    }

    private void crashPlanet(float obj, object missile)
    {

    }
}

我的问题从这里开始。

用随机坐标创建的导弹对象的Z轴值为零。（旋转 Z）

我希望导弹（预制件）指向Center_Planet的中心坐标。

例如下图所示。

为了实现这一点，我使用了 LookAT 函数，也尝试过使用 Quaternion.rotation 函数。

但是执行失败了。

SO..为了实现以上，我们尝试使用Mathf函数进行计算，我不知道如何公式化。

为了实现上述目标，我将不胜感激有关如何设置公式的一些建议。

如果你能给我作为初学者的建议，我将不胜感激。

Answer 1

您可以使用 transform.right = ....

分配二维元素的 "forward" 矢量

Transform target = GameObject.Find("Center_Planet").transform ;

// ...

for (int i = 0; i < missile_num; ++i)
{
    // ...     
     missile_prefab_instantiate.transform.right = target.position - missile_prefab_instantiate.transform.position ;
}
yield return new WaitForSeconds(0.9f);

// ...

Unity中如何在2D中指向特定物体的中心坐标？

How to point to the center coordinates of a specific object in 2D in Unity?

c#

unity3d

unity5

math-functions