Method point

external/.d3.js:18167–18184

(x, y)

    this._line = 1 - this._line;
  }
  point(x, y) {
    x = +x, y = +y;
    switch (this._point) {
      case 0: {
        this._point = 1;
        if (this._line) this._context.lineTo(x, y);
        else this._context.moveTo(x, y);
        break;
      }
      case 1: this._point = 2; // falls through
      default: {
        if (this._x) this._context.bezierCurveTo(this._x0 = (this._x0 + x) / 2, this._y0, this._x0, y, x, y);
        else this._context.bezierCurveTo(this._x0, this._y0 = (this._y0 + y) / 2, x, this._y0, x, y);
        break;
      }
    }
    this._x0 = x, this._y0 = y;
  }
}

class BumpRadial {