constructor(vrDisplay, scene) {
    super('Planes');
    this.vrDisplay = vrDisplay;
    this.planes = new ARPlanes(this.vrDisplay);
    this._onPoll = this._onPoll.bind(this);
    this.update('Looking for planes...', false, true);
    if (scene) {
      scene.add(this.planes);
    }
  }
@param {VRDisplay} vrDisplay
@param {THREE.Scene} scene