如何统一找到数组中第二近的对象？ [复制]

Posted 2023-04-12

【中文标题】如何统一找到数组中第二近的对象？ [复制]

【英文标题】：How to find second closest object in array in unity? [duplicate]

【发布时间】：2022-01-16 06:12:03

【问题描述】：

我在 Unity 中遇到问题。我想创建一个脚本，它能够找到离玩家最近的物体（我设法做到了）和离玩家第二近的物体。我的问题是如何修改此代码使其也适用于第二个对象？

public class Robot2 : MonoBehaviour

    public GameObject cameraHolder;
    public Transform[] objects;
    private Transform nearestObj;
    private Transform secondObj;
    void Update()
    
        float lowestDist = Mathf.Infinity;
        nearestObj = null;
        secondObj = null;
    
        foreach(Transform obj in objects)
        
            float dist = Vector3.Distance(transform.position, obj.position);
            if(dist < lowestDist)
            
                lowestDist = dist;
                nearestObj = obj;
            
         
        Debug.DrawLine(transform.position, nearestObj.transform.position, Color.red); 
        cameraHolder.transform.position = nearestObj.transform.position;
    

【参考方案1】：

您可以像下面的代码一样使用 LINQ：

Objects.ToList().OrderBy(o => Vector3.Distance(transform.position, o.position))[1]

或

Objects.ToList().OrderByDescending(o => Vector3.Distance(transform.position, o.position))[1]

【参考方案2】：

你可以这样做：

float lowestDistance = Mathf.Infinity;
float nextLowestDistance = Mathf.Infinity;
nearestObject = null;
secondObject = null;

foreach ( Transform object in objects )

    float dist = Vector3.Distance( object.position, transform.position );
    if ( dist < lowestDistance )
    
        if ( lowestDistance < nextLowestDistance )
        
            nextLowestDistance = lowestDistance;
            secondObject = nearestObject;
        
        lowestDistance = dist;
        nearestObject = object;
    
    else if ( dist < nextLowestDistance )
    
       nextLowestDistance = dist;
       secondObject = object;