function WinderStair() {
    Geometry.apply(this, arguments);
    this.points = [];
	this.temp_points=[];
	this.linkedpoints=[];
	this.borderpoints={};
	this.arrowpoints={};
	this.lastpoint=null;
	//this.point1=null;
	//this.point2=null;
	this.toward=1;
	this.vectorMeasureid=null;
	this.wallThickness;
	this.symbolType="Stair";
};

WinderStair.prototype = new Geometry();
WinderStair.prototype.geoType = "WinderStair";