Unity---判斷某個點是否在攝像機的視景范圍內

using UnityEngine;

[RequireComponent(typeof(Camera))]
public class VisualDetectionCamera : MonoBehaviour
{
    Camera m_Camera;

    Transform m_Trans;
    public Transform Trans
    {
        get
        {
            if (null == m_Trans)
                m_Trans = transform;
            return m_Trans;
        }
    }

    void Awake()
    {
        m_Camera = GetComponent<Camera>();
        InitializeCamera();
    }

    void InitializeCamera()
    {
        if (null != m_Camera)
        {

        }
    }

    //計算攝像機的視景並返回它的六個面
    Plane[] GetFrustumPlanes()
    {
        return GeometryUtility.CalculateFrustumPlanes(m_Camera);
    }

    public bool IsPointInFrustum(Vector3 point)
    {
        Plane[] planes = GetFrustumPlanes();

        for (int i = 0, iMax = planes.Length; i < iMax; ++i)
        {
            //判斷一個點是否在平面的正方向上
            if (!planes[i].GetSide(point))
                return false;
        }

        return true;
    }
}

測試工程:

鏈接：https://pan.baidu.com/s/13LDXG2Uk-nI80sXKguQBBw
提取碼：l9oa