javascript
/
three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
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		[page:Object3D] &rarr; [page:Line] &rarr; [page:LineSegments] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			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:BufferGeometry] for this to work,
			so it won't work with [page:Sprite Sprites].
		</p>

		<h2>Code Example</h2>

		<code>
		const sphere = new THREE.SphereGeometry();
		const object = new THREE.Mesh( sphere, new THREE.MeshBasicMaterial( 0xff0000 ) );
		const box = new THREE.BoxHelper( object, 0xffff00 );
		scene.add( box );
		</code>

		<h2>Examples</h2>

		<p>
			[example:webgl_helpers WebGL / helpers]<br/>
			[example:webgl_loader_nrrd WebGL / loader / nrrd]<br/>
			[example:webgl_buffergeometry_drawrange WebGL / buffergeometry / drawrange]
		</p>

		<h2>Constructor</h2>


		<h3>[name]( [param:Object3D object], [param:Color color] )</h3>
		<p>
		[page:Object3D object]  -- (optional) the object3D to show the world-axis-aligned boundingbox.<br />
		[page:Color color] --  (optional) hexadecimal value that defines the box's color. Default is 0xffff00.<br /><br />

		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.
		</p>

		<h2>Properties</h2>
		<p>See the base [page:LineSegments] class for common properties.</p>


		<h2>Methods</h2>
		<p>See the base [page:LineSegments] class for common methods.</p>

		<h3>[method:null update]()</h3>
		<p>
			Updates the helper's geometry to match the dimensions
			of the object, including any children. See [page:Box3.setFromObject].
		</p>

		<h3>[method:BoxHelper setFromObject]( [param:Object3D object] )</h3>
		<p>
			[page:Object3D object] - [page:Object3D] to create the helper of.<br /><br />

			Updates the wireframe box for the passed object.
		</p>

		<h2>Source</h2>

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