提问人：HarrisonO 提问时间：8/7/2020 更新时间：8/7/2020 访问量：37
我怎样才能在“青铜”附近创建一个实例化我的边界，当它最接近时，我怎样才能在它周围创建一个实例化边界，而当它不再是最近的边界时，我怎样才能在它周围创建一个实例化我的边界？
How can I create a instantiate my border around a "bronze" when it is the closest and destroy the border when no longer the closest?
问：
我已经坚持了一段时间。我想要的是将我的轮廓对象实例化到我的青铜基地游戏对象的位置，并在青铜基地不再离玩家最近时销毁它。
我愿意完全重启我的青铜脚本，如果这意味着我可以让它变得更容易。
提前致谢！
查找最接近的青铜脚本
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using UnityEngine;
public class FindBronze : MonoBehaviour
{
void Update()
{
FindClosestBronze();
}
void FindClosestBronze()
{
float distanceToClosestBronze = Mathf.Infinity;
Bronze closestBronze = null;
Bronze[] allBronze = GameObject.FindObjectsOfType<Bronze>();
foreach (Bronze currentBronze in allBronze)
{
float distanceToBronze = (currentBronze.transform.position - this.transform.position).sqrMagnitude;
if (distanceToBronze < distanceToClosestBronze)
{
distanceToClosestBronze = distanceToBronze;
closestBronze = currentBronze;
}
if (distanceToBronze > distanceToClosestBronze)
{
closestBronze.GetComponent<Bronze>().notSelected();
}
closestBronze.GetComponent<Bronze>().Selected();
}
}
}
青铜（包括轮廓）字体
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Bronze : MonoBehaviour
{
public bool isSelected = false;
public Animator anim;
[SerializeField]
public GameObject selectedBox;
public GameObject bronzeBase;
private GameObject clone;
// Update is called once per frame
void Awake()
{
clone = (GameObject)Instantiate(selectedBox, bronzeBase.transform);
}
public void Selected()
{
if (!isSelected)
{
clone = (GameObject)Instantiate(selectedBox, bronzeBase.transform);
isSelected = true;
}
else
{
Destroy(clone);
isSelected = false;
}
}
public void notSelected()
{
Destroy(selectedBox);
}
}
答：
1赞
derHugo
8/7/2020
#1
在你正在破坏预制件！BronzenotSelectedselectBox
您可能更想销毁该实例。clone
无论如何，我会建议一些我会做不同的事情
- 而不是一直只使用
InstantiateDestroySetActive - 而不是在 HashSet 事件驱动的存储中使用它们：每个 Bronze 实例都会注册和注销自身
FindObjectOfTypeUpdate - 取决于个人品味，但我会用它来找到最接近的实例
Linq
这可能看起来有点像
public class Bronze : MonoBehaviour
{
// Every instance of this component registers and unregisters itself here
public static readonly HashSet<Bronze> Instances = new HashSet<Bronze>();
[Header("References")]
public Animator anim;
[SerializeField] private GameObject selectedBox;
[SerializeField] private GameObject bronzeBase;
[Header("Debugging")]
[SerializeField] bool _isSelected = false;
private GameObject clone;
// Have a property for the selection
public bool IsSelected
{
// when something reads this property return _isSelected
get => _isSelected;
// This is executed everytime someone changes the value of IsSelected
set
{
if(_isSelected == value) return;
_isSelected = value;
clone.SetActive(_isSelected);
}
}
// Update is called once per frame
void Awake()
{
// Instantiate already returns the type of the given prefab
clone = Instantiate(selectedBox, bronzeBase.transform);
// Register yourself to the alive instances
Instances.Add(this);
}
private void OnDestroy ()
{
// Remove yourself from the Instances
Instances.Remove(this);
}
}
然后使用它
using System.Linq;
public class FindBronze : MonoBehaviour
{
private Bronze currentSelected;
private void Update()
{
UpdateClosestBronze();
}
void UpdateClosestBronze()
{
if(Bronze.Instances.Count ==0) return;
// This takes the instances
// orders them by distance ascending using the sqrMagnitude
// of the vector between the Instance and you
// sqrMagnitude is more efficient than Vector3.Distance when you only need to compare instead of the actual distance
// then finally it takes the first item
var newClosest = Bronze.Instances.OrderBy(b => (b.transform.position - transform.position).sqrMagnitude).First();
// skip if the result is the same as last time
if(newClosest == currentSelected) return;
// otherwise first deselect the current selection if there is one
if(currentSelected)
{
currentSelected.IsSelected = false;
}
// Then set the new selection
currentSelected = newSelected;
currentSelected.IsSelected = true;
}
}
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