GeometryUtility.CalculateFrustumPlanes 计算视景平面

# [GeometryUtility](GeometryUtility.html).CalculateFrustumPlanes 计算视景平面

static function *CalculateFrustumPlanes* (*camera* : [Camera](../Camera/Camera.html)) : [Plane](../Plane/Plane.html)[]

*Description* 描述

Calculates frustum planes.

计算视景平面

This function takes given camera's view frustum and returns six planes that
form it.

这个函数取得给定的摄像机的视景并返回它的六个面。

参见： [Plane](../Plane/Plane.html), [GeometryUtility.TestPlanesAABB](GeometryUtility.TestPlanesAABB.html).

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	private Camera cam;
	private Plane[] planes;
	void Start() {
		cam = Camera.main;
		planes = GeometryUtility.CalculateFrustumPlanes(cam);
		int i = 0;
		while (i < planes.Length) {
			GameObject p = GameObject.CreatePrimitive(PrimitiveType.Plane);
			p.name = "Plane " + i.ToString();
			p.transform.position = -planes[i].normal * planes[i].distance;
			p.transform.rotation = Quaternion.FromToRotation(Vector3.up, planes[i].normal);
			i++;
		}
	}
}
```

```
// Creates 6 planes that represent the camera frustrum.
//创建6个平面，代表摄像机视景体
private var cam : Camera;
private var planes : Plane[];

function Start() {
	cam = Camera.main;
	planes = GeometryUtility.CalculateFrustumPlanes(cam);

for(var i : int = 0; i < planes.Length; i++) {
		var p : GameObject = GameObject.CreatePrimitive(PrimitiveType.Plane);
		p.name = "Plane " + i.ToString();
		p.transform.position = -planes[i].normal * planes[i].distance;
		p.transform.rotation = Quaternion.FromToRotation(Vector3.up, planes[i].normal);
	}
}
```

• static function *CalculateFrustumPlanes*
(*worldToProjectionMatrix* : [Matrix4x4](../Matrix4x4/Matrix4x4.html)) : [Plane](../Plane/Plane.html)[]

*Description* 描述

Calculates frustum planes.

计算视景平面

This function returns six planes of a frustum defined by given view &
projection matrix.

这个函数返回由给定的视窗和投影矩阵定义的视景的六个面。

参见：[Plane](../Plane/Plane.html), [GeometryUtility.TestPlanesAABB](GeometryUtility.TestPlanesAABB.html).