[page:Object3D] →

# [name]

Visualize a [page:DirectionalLight]'s effect on the scene

## Constructor

### [name]([page:DirectionalLight light], [page:Number size])

light -- [page:DirectionalLight] -- Light to visualize
size -- dimensions of the plane
Creates a line and plane to visualize the light's position and direction

## Properties

### [property:Line lightPlane]

Contains the line mesh showing the location of the directional light.

### [property:DirectionalLight light]

Contains the directionalLight.

### [property:Line targetLine]

Contains the line mesh that shows the direction of the light.

## Methods

### .[method:null update]()

Updates the helper to match the position and direction of the [page:.light].

## Source

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