# [name]

Frustums are used to determine what is inside the camera's field of view. They help speed up the rendering process.

## Constructor

### [name]()

## Properties

### .[page:Array planes]

Array of 6 [page:Vector4 vectors].

## Methods

### .setFromMatrix( [page:Matrix4 matrix] )

### .contains( [page:Object3D object] ) [page:Boolean]

Checks whether the object is inside the Frustum.

## Source

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]