//CLASS:几何类型：矩形
//x1，y1坐下角的坐标，x2，y2右上角的坐标
function Rectangle(x1, y1,x2,y2 ) {
    Geometry.apply(this, arguments);
    this.leftupX = x1;
    this.leftupY = y2;
    this.rightupX= x2;
    this.rightupY= y2;
    this.rightdownX=x2;
    this.rightdownY=y1;
    this.leftdownX=x1;
    this.leftdownY=y1;
};

Rectangle.prototype = new Rectangle();

Rectangle.prototype.geoType = "Rectangle";