function InfiniteLine(index, x, y, a, b) {
                            var _this = _super.call(this, index, x, y) || this;
                            _this.a = a;
                            _this.b = b;
                            return _this;
                        }
@param {number} x0 y0 center point of ellipse containing the arc
@param {number} x1 y1 starting point of the arc
@param {number} x2 y2 endpoint of the arc
@param {number} x3 y3 control point
@return {boolean} true if the start to end angle that contains the control point is a reflex angle
@param {number} y0
@param {number} y1
@param {number} y2
@param {number} y3