code: function(enable) {
      if (enable === undefined) {
        return this._rockAndRoll !== null;
      }
      if (!!enable) {
        if (this._rockAndRoll === null) {
          this._rockAndRoll = anim.rockAndRoll();
          this._animControl.add(this._rockAndRoll);
          this.requestRedraw();
        }
        return true;
      } 
      this._animControl.remove(this._rockAndRoll);
      this._rockAndRoll = null;
      this.requestRedraw();
      return false;
    }
docs: enable disable rock and rolling of camera