constructor( octree, color = 0xffff00 ) {

		super( new BufferGeometry(), new LineBasicMaterial( { color: color, toneMapped: false } ) );

		/**
		 * The octree to visualize.
		 *
		 * @type {Octree}
		 */
		this.octree = octree;

		/**
		 * The helper's color.
		 *
		 * @type {number|Color|string}
		 */
		this.color = color;

		this.type = 'OctreeHelper';

		this.update();

	}
Constructs a new Octree helper.

@param {Octree} octree - The octree to visualize.
@param {number|Color|string} [color=0xffff00] - The helper's color.