Camera.cullingMatrix

# [Camera](https://docs.unity3d.com/cn/2019.4/ScriptReference/Camera.html).cullingMatrix

public [Matrix4x4](https://docs.unity3d.com/cn/2019.4/ScriptReference/Matrix4x4.html) **cullingMatrix** ;

## 描述

为摄像机设置一个自定义矩阵，以用于所有剔除查询。

通过调用 [ResetCullingMatrix](https://docs.unity3d.com/cn/2019.4/ScriptReference/Camera.ResetCullingMatrix.html) 禁用该设置以前，设置持续有效。

在必须以相同方式剔除多个摄像机以渲染反射等特效的情况下，自定义剔除矩阵非常有用。

```
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    Camera cullingCamera;

void Awake()
    {
        cullingCamera = gameObject.AddComponent<Camera>();
        SetMainCameraCustomCullingMatrix(new Vector3(10.0f, 10.0f, 10.0f), Vector3.zero);
    }

void SetMainCameraCustomCullingMatrix(Vector3 cameraPosition, Vector3 lookAtPosition)
    {
        transform.position = cameraPosition;
        transform.LookAt(lookAtPosition);
        Camera.main.cullingMatrix = cullingCamera.projectionMatrix * cullingCamera.worldToCameraMatrix;
    }

void ResetMainCameraCullingMatrix()
    {
        Camera.main.ResetCullingMatrix();
    }
}
```