_xiaofang/xiaofang/Assets/Res/gsj/xiaozhigou.cs

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

public class xiaozhigou : MonoBehaviour
{
    public Camera mainCamera;              // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    public RectTransform uiCanvas;         // UI Canvas <20><> RectTransform
    public GameObject targetIconPrefab;    // UI ͼ<><CDBC><EFBFBD><EFBFBD>Ԥ<EFBFBD><D4A4><EFBFBD><EFBFBD>
    private LinkedList<GameObject> playerList = new LinkedList<GameObject>(); // <20>洢<EFBFBD><E6B4A2>ǩΪ "Player" <20>Ķ<EFBFBD><C4B6><EFBFBD>
    private GameObject peopleposition;//λ<>õ<EFBFBD><C3B5><EFBFBD>Ϣ
    private Dictionary<GameObject, RectTransform> playerUIMap = new Dictionary<GameObject, RectTransform>(); // <20>洢<EFBFBD><E6B4A2>ɫ<EFBFBD><C9AB><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6> UI <20><><EFBFBD><EFBFBD>

    private void Start()
    {
        peopleposition = GameObject.Find("peopleposition");
        if (peopleposition == null)
        {
            Debug.LogError("<22><>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>Ϊ 'peopleposition' <20><> GameObject <20><>Ϊ UI <20>ĸ<EFBFBD><C4B8><EFBFBD><EFBFBD>塣");
            return;
        }

        // <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD> "Player" <20><>ǩ<EFBFBD><C7A9><EFBFBD>󲢴<EFBFBD><F3B2A2B4><EFBFBD> UI <20><><EFBFBD><EFBFBD>
        UpdatePlayerList();
        CreateUIForPlayers();
    }

    void Update()
    {
        // ʵʱ<CAB5><CAB1><EFBFBD><EFBFBD> Player <20>б<EFBFBD><D0B1>Ͷ<EFBFBD>Ӧ<EFBFBD><D3A6> UI
        UpdatePlayerList();
        UpdateUIForPlayers();
    }

    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD> "Player" <20><><EFBFBD><EFBFBD>
    private void UpdatePlayerList()
    {
        // <20><>ȡ<EFBFBD><C8A1><EFBFBD>д<EFBFBD><D0B4><EFBFBD> "Player" <20><>ǩ<EFBFBD>Ķ<EFBFBD><C4B6><EFBFBD>
        GameObject[] players = GameObject.FindGameObjectsWithTag("Player");

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Player
        foreach (GameObject player in players)
        {
            if (!playerList.Contains(player)) // <20><><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD>ɫ
            {
                playerList.AddLast(player);

                // Ϊ<><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ<EFBFBD><C9AB><EFBFBD><EFBFBD> UI <20><><EFBFBD><EFBFBD>
                if (!playerUIMap.ContainsKey(player))
                {
                    CreateUIForPlayer(player);
                }
            }
        }

        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƴ<EFBFBD><C6B3><EFBFBD> Player
        var node = playerList.First;
        while (node != null)
        {
            var nextNode = node.Next;

            if (!System.Array.Exists(players, p => p == node.Value))
            {
                // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɫ<EFBFBD>ѱ<EFBFBD><D1B1>Ƴ<EFBFBD><C6B3><EFBFBD>ɾ<EFBFBD><C9BE><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6> UI <20><><EFBFBD><EFBFBD>
                if (playerUIMap.ContainsKey(node.Value))
                {
                    Destroy(playerUIMap[node.Value].gameObject);
                    playerUIMap.Remove(node.Value);
                }

                playerList.Remove(node);
            }

            node = nextNode;
        }
    }

    // Ϊ<><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҵ<EFBFBD><D2B4><EFBFBD> UI <20><><EFBFBD><EFBFBD>
    private void CreateUIForPlayers()
    {
        foreach (var player in playerList)
        {
            if (!playerUIMap.ContainsKey(player))
            {
                CreateUIForPlayer(player);
            }
        }
    }

    // Ϊ<><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҵ<EFBFBD><D2B4><EFBFBD> UI <20><><EFBFBD><EFBFBD>
    private void CreateUIForPlayer(GameObject player)
    {
        if (targetIconPrefab == null || uiCanvas == null)
        {
            Debug.LogError("<22><>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> TargetIconPrefab <20><> uiCanvas<61><73>");
            return;
        }

        // ʵ<><CAB5><EFBFBD><EFBFBD> UI ͼ<><CDBC>
        GameObject iconInstance = Instantiate(targetIconPrefab, peopleposition.transform);

        // <20><>ȡ RectTransform <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
        RectTransform iconRectTransform = iconInstance.GetComponent<RectTransform>();

        // <20><><EFBFBD>ó<EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>
        Text nameText = iconInstance.GetComponentInChildren<Text>();
        if (nameText != null)
        {
            nameText.text = player.name; // <20><>ʾ<EFBFBD><CABE>ɫ<EFBFBD><C9AB><EFBFBD><EFBFBD>
        }

        // <20><> UI ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҷ<EFBFBD>Ӧ
        playerUIMap[player] = iconRectTransform;
    }

    // ʵʱ<CAB5><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD> UI
    private void UpdateUIForPlayers()
    {
        foreach (var player in playerList)
        {
            if (!playerUIMap.ContainsKey(player)) continue;

            RectTransform targetIcon = playerUIMap[player];

            // <20><>ȡ<EFBFBD><C8A1><EFBFBD>ҵ<EFBFBD><D2B5><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD><EFBFBD>
            Vector3 screenPoint = mainCamera.WorldToScreenPoint(player.transform.position);

            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><C7B7><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><C4BB>
            if (screenPoint.z > 0 && screenPoint.x > 0 && screenPoint.x < Screen.width && screenPoint.y > 0 && screenPoint.y < Screen.height)
            {
                // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD>ڣ<EFBFBD><DAA3><EFBFBD>ʾͼ<CABE><CDBC>
                targetIcon.gameObject.SetActive(true);
                targetIcon.position = screenPoint;

                //// <20><><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
                //Text nameText = targetIcon.GetComponentInChildren<Text>();
                //if (nameText != null)
                //{
                //    float distance = Vector3.Distance(mainCamera.transform.position, player.transform.position);
                //    nameText.text = $"{player.name}\n<><6E><EFBFBD><EFBFBD>: {distance:F1} <20><>";
                //}
            }
            else
            {
                // <20><><EFBFBD>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD>ڣ<EFBFBD><DAA3><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC>
                targetIcon.gameObject.SetActive(false);
            }
        }
    }
}