99 lines
3.8 KiB
C#
99 lines
3.8 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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public class CameraOcclusionDetector : MonoBehaviour
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{
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public Transform player; // 主角的Transform
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public LayerMask obstacleLayer; // 障碍物层，例如：Default, Environment
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public List<GameObject> objectsToCheck; // 要检测是否被遮挡的物体列表
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public List<GameObject> OldhitObject=new List<GameObject>(); // 碰撞体的GameObject
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public Vector3 Offset; // 偏移量，用于修正碰撞体的位置
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public Vector3 OffsetCamera; // 偏移量，用于修正碰撞体的位置
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public float minDistance = 1.5f;
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// Start is called before the first frame update
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void Start()
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{
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}
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// Update is called once per frame
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void Update()
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{
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foreach (var obj in objectsToCheck)
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{
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bool isOvvluded = IsPlayerOccluded(obj);
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//Debug.Log(obj.name + "是否被遮挡：" + isOvvluded);
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if (isOvvluded)
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{
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obj.SetActive(false);
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if (!OldhitObject.Contains(obj))
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OldhitObject.Add(obj);
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}
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}
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if (OldhitObject.Count > 0)
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{
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// 恢复之前被遮挡但现在可见的物体
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for (int i = OldhitObject.Count - 1; i >= 0; i--)
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{
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float distance = GetDistanceToPlayer(OldhitObject[i]);
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//Debug.Log("距离：" + OldhitObject[i] + "距离：" + distance);
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if (distance > minDistance)
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{
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OldhitObject[i].SetActive(true);
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//OldhitObject.RemoveAt(i);
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}
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}
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}
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}
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/// <summary>
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/// 判断是否有物体遮挡了 "摄像机 -> 主角" 的视线
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/// </summary>
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/// <returns>被遮挡返回 true，视野清晰返回 false</returns>
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public bool IsPlayerOccluded(GameObject obj)
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{
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// 计算从主角指向摄像机的方向
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Vector3 _player = player.position + Offset;
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Vector3 _camera = transform.position + OffsetCamera;
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Vector3 directionToCamera = _camera - _player;
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float distance = directionToCamera.magnitude;
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// 从主角向摄像机发射射线，并渲染射线
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//Debug.DrawRay(_player, directionToCamera.normalized * distance, Color.red);
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// 关键点：从主角向摄像机发射射线
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if (Physics.Raycast(player.position, directionToCamera.normalized, out RaycastHit hit, distance, obstacleLayer))
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{
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// 1. 如果射线击中的距离非常近（几乎在主角身上），可能是主角自身的碰撞体，视为无遮挡
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// 2. 如果射线击中了非主角物体（距离正常），则是被遮挡了
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// 定义一个极小的距离阈值，用于忽略主角自身的碰撞体
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float minDistance = 0.1f;
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//Debug.Log("被遮挡了！击中物体：" + hit.collider.name + "，距离：" + hit.distance);
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if (hit.distance > minDistance && obj == hit.transform.gameObject)
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{
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//Debug.Log("被遮挡了！击中物体：" + hit.collider.name + "，距离：" + hit.distance);
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//hitObject= hit.transform.gameObject; // 记录碰撞体的GameObject
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return true; // 视野被遮挡
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}
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}
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//Debug.Log("视野清晰");
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return false; // 视野未被遮挡
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}
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/// <summary>
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/// 返回指定物体到玩家的距离
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/// </summary>
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/// <param name="obj">要检测距离的物体</param>
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/// <returns>物体到玩家的距离</returns>
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public float GetDistanceToPlayer(GameObject obj)
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{
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Vector3 objPosition = obj.transform.position;
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Vector3 playerPosition = player.position;
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return Vector3.Distance(objPosition, playerPosition);
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}
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}
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