73 lines
2.2 KiB
C#
73 lines
2.2 KiB
C#
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using UnityEngine;
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namespace Gameplay.Player
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{
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/// <summary>
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/// 通用第一人称射线检测，获取玩家注视的 GameObject。
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/// </summary>
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public class FirstPersonRaycaster : MonoBehaviour
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{
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[Header("Raycast Settings")]
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[SerializeField] private float rayLength = 15f;
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[SerializeField] private LayerMask layerMask = ~0; // 默认检测所有层
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[SerializeField] private Camera playerCamera;
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[SerializeField] private bool drawGizmos = true;
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/// <summary>
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/// 当前玩家注视的 GameObject（只读）。
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/// </summary>
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public GameObject CurrentLookAtObject { get; private set; }
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void Awake()
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{
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if (playerCamera == null)
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{
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var camObj = GameObject.FindWithTag("MainCamera");
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if (camObj != null)
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playerCamera = camObj.GetComponent<Camera>();
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}
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}
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void Update()
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{
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UpdateLookAtObject();
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}
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private void UpdateLookAtObject()
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{
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if (playerCamera == null)
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{
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CurrentLookAtObject = null;
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return;
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}
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Ray ray = new Ray(playerCamera.transform.position, playerCamera.transform.forward);
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if (Physics.Raycast(ray, out RaycastHit hit, rayLength, layerMask))
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{
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CurrentLookAtObject = hit.collider.gameObject;
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}
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else
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{
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CurrentLookAtObject = null;
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}
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}
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void OnDrawGizmos()
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{
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if (!drawGizmos) return;
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Camera cam = playerCamera;
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if (cam == null && Application.isPlaying == false)
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{
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var camObj = GameObject.FindWithTag("MainCamera");
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if (camObj != null)
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cam = camObj.GetComponent<Camera>();
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}
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if (cam == null) return;
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Gizmos.color = Color.cyan;
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Vector3 origin = cam.transform.position;
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Vector3 dir = cam.transform.forward * rayLength;
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Gizmos.DrawLine(origin, origin + dir);
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}
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}
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}
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