gistfile1.js

ORectangle = function(w,h) {
    var width = w, height = h;
    return {
        getWidth: function() { return width; },
        getHeight: function() { return height; },
        setWidth: function(w) { width = w; },
        setHeight: function(h) { height = h; },
        area: function() { return width * height },
        toString: function() { 
            return '(' + this.getWidth() + 'X' + this.getHeight() + ')' 
        }
    };
};

PositionedORectangle = function(w,h,xIn,yIn) {
    var x = xIn, 
        y = yIn,
        rect = new ORectangle(w,h),
        me = {
            getX: function() { return x; },
            setX: function(xIn) { this.x = xIn; },
            getY: function() { return y; },
            setY: function(yIn) { this.y = yIn; },
            distanceFrom: function(otherRect) {
                return Math.sqrt(
                    Math.pow(this.getX() - otherRect.getX(), 2) 
                    + Math.pow(this.getY() - otherRect.getY(), 2)
                );
            },
            toString: function() { 
                return rect.toString() + ' at ' + this.getX() + ',' + this.getY();
            }
        };
    return mixin(rect, me);
};

ColoredPositionedORectangle = function(w,h,xIn,yIn,clr) {
    var color = clr,
        rect = new PositionedORectangle(w,h,xIn,yIn),
        me = {
            getColor: function() { return color; },
            setColor: function(clr) { this.color = clr; },
            toString: function() { 
                return color + ' ' + rect.toString() + ' at ' + this.getX() + ',' + this.getY();
            }
        };
    return mixin(rect, me);
};