Method _circumference

src/controllers/controller.doughnut.js:243–251

* @private

(i, reset)

   * @private
   */
  _circumference(i, reset) {
    const opts = this.options;
    const meta = this._cachedMeta;
    const circumference = this._getCircumference();
    if ((reset && opts.animation.animateRotate) || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {
      return 0;
    }
    return this.calculateCircumference(meta._parsed[i] * circumference / TAU);
  }

  updateElements(arcs, start, count, mode) {
    const reset = mode === 'reset';