Method setGraphical

src/backend/kernel.js:483–487

* @desc Toggle graphical output mode * @param {Boolean} flag - true to enable graphical output * @return {this}

(flag)

   * @return {this}
   */
  setGraphical(flag) {
    this.graphical = flag;
    this.precision = 'unsigned';
    return this;
  }

  /**
   * @desc Set the maximum number of loop iterations