1 using UnityEngine;
 2 
 3 public partial class CommonFunction
 4 {
 5     /// <summary>
 6     /// 視口座標系是將Game檢視的螢幕座標系單位化，左下角（0，0），右上角（1，1）
 7     /// 攝像機視口座標系下的座標範圍
 8     /// </summary>
 9     static Rect viewRect = new Rect(0, 0, 1, 1);
10 
11     /// <summary>
12     /// 以Game檢視為準
13     /// 判斷2D座標系下的一個點是否在指定的攝像機視野範圍內
 
14     /// 忽略z軸
15     /// </summary>
16     /// <param name="camera"></param>
17     /// <param name="uiWorldPos"></param>
18     /// <returns></returns>
19     public static bool Is2DPointInsideCameraView(Camera camera, Vector3 uiWorldPos)
20     {
21         if (null == camera)
 
22         {
23             return false;
24         }
25 
26         Vector3 viewPos = camera.WorldToViewportPoint(uiWorldPos);
27         return viewRect.Contains(viewPos);
28     }
29 
30     /// <summary>
31     /// 以Game檢視為準
32     /// 判斷3D座標系下的一個點是否在指定的攝像機視野範圍內
33     /// </summary>
34     /// <param name="camera"></param>
 

35     /// <param name="worldPos"></param>
36     /// <returns></returns>
37     public static bool Is3DPointInsideCameraView(Camera camera, Vector3 worldPos)
38     {
39         if (null == camera)
40         {
41             return false;
42         }
43 
44         //獲取攝像機的六個平面
45         Plane[] planes = GeometryUtility.CalculateFrustumPlanes(camera);
46         for (int i = 0, iMax = planes.Length; i < iMax; ++i)
47         {
48             //判斷一個點是否在平面的正方向
49             if (!planes[i].GetSide(worldPos))
50             {
51                 return false;
52             }
53         }
54 
55         return true;
56     }
57 }