[page:Object3D] → [page:Line] → [page:LineSegments] →

# [name]

Helper object to graphically show the world-axis-aligned bounding box around an object. The actual bounding box is handled with [page:Box3], this is just a visual helper for debugging. It can be automatically resized with the [page:BoxHelper.update] method when the object it's created from is transformed. Note that the object must have a [page:Geometry] or [page:BufferGeometry] for this to work, so it won't work with [page:Sprite Sprites].

## Example

[example:webgl_helpers WebGL / helpers]
[example:webgl_loader_nrrd WebGL / loader / nrrd]
[example:webgl_buffergeometry_drawcalls advanced / buffergeometry / drawcalls]
`var sphere = new THREE.SphereGeometry(); var object = new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( 0xff0000 ) ); var box = new THREE.BoxHelper( object, 0xffff00 ); scene.add( box );`

## Constructor

### [name]( [param:Object3D object], [param:Color color] )

[page:Object3D object] -- (optional) the object3D to show the world-axis-aligned boundingbox.
[page:Color color] -- (optional) hexadecimal value that defines the box's color. Default is 0xffff00.
Creates a new wireframe box that bounds the passed object. Internally this uses [page:Box3.setFromObject] to calculate the dimensions. Note that this includes any children.

## Properties

See the base [page:LineSegments] class for common properties.

## Methods

See the base [page:LineSegments] class for common methods.

### [method:null update]()

Updates the helper's geometry to match the dimensions of the object, including any children. See [page:Box3.setFromObject].

### [method:BoxHelper setFromObject]( [param:Object3D object] )

[page:Object3D object] - [page:Object3D] to create the helper of.
Updates the wireframe box for the passed object.

## Source

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