unity3d：物体出现在摄像机后

小咪咪 2022-04-05 11:11 262阅读 0赞

using Framework.Event;
    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class ModelVisible : MonoBehaviour {
        public long m_id ;
        public Camera m_cam;
        //void OnBecameVisible()
        //{
        //    if (m_id != -1)
        //    {
        //        //EventManager.Instance.DispatchEvent(Common.EventStr.ModelVisible, new EventDataEx<bool>(true));
        //        hudpanel.m_instance.SetVisible(m_id, true);
        //    }
        //}
    
        //void  OnBecameInvisible()
        //{
        //    if (m_id != -1)
        //    {
        //        //EventManager.Instance.DispatchEvent(Common.EventStr.ModelVisible, new EventDataEx<bool>(false));
        //        hudpanel.m_instance.SetVisible(m_id, false);
        //    }
        //}
    
        public bool IsInView(Vector3 worldPos)
        {
            Transform camTransform = m_cam.transform;
            Vector2 viewPos = m_cam.WorldToViewportPoint(worldPos);
            Vector3 dir = (worldPos - camTransform.position).normalized;
            float dot = Vector3.Dot(camTransform.forward, dir);     //判断物体是否在相机前面  
    
            if (dot > 0 && viewPos.x >= 0 && viewPos.x <= 1 && viewPos.y >= 0 && viewPos.y <= 1)
                return true;
            else
                return false;
        }
        void Update()
        {
            if (m_cam == null)
            {
                return;
            }
            if (IsInView(transform.position))
            {
                //Debug.Log("目前本物体在摄像机范围内");
                hudpanel.m_instance.SetVisible(m_id, true);
            }
            else
            {
                //Debug.Log("目前本物体不在摄像机范围内");
                hudpanel.m_instance.SetVisible(m_id, false);
            }
        }
    
    }