1 using UnityEngine;
2
3 public partial class CommonFunction
4 {
5 /// <summary>
6 /// 视口坐标系是将Game视图的屏幕坐标系单位化，左下角（0，0），右上角（1，1）
7 /// 摄像机视口坐标系下的坐标范围
8 /// </summary>
9 static Rect viewRect = new Rect(0, 0, 1, 1);
10
11 /// <summary>
12 /// 以Game视图为准
13 /// 判断2D坐标系下的一个点是否在指定的摄像机视野范围内
14 /// 忽略z轴
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视图为准
32 /// 判断3D坐标系下的一个点是否在指定的摄像机视野范围内
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 //获取摄像机的六个平面
45 Plane[] planes = GeometryUtility.CalculateFrustumPlanes(camera);
46 for (int i = 0, iMax = planes.Length; i < iMax; ++i)
47 {
48 //判断一个点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 }
