Geometry Structure prototype way - Node.js Object

Node.js examples for Object:Prototype

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Description

Geometry Structure prototype way

Demo Code


Object.prototype.extend = function (properties) {
    function f() { };
    f.prototype = Object.create(this);
    for (var prop in properties) {
        f.prototype[prop] = properties[prop];
    }/*www  .ja  va2 s  .  c  om*/
    f.prototype._super = this;
    return new f();
}

var shapesModule = (function () {
    var shape = {
        init: function init(color) {
            this._color = color;
        },
        toString: function () {
            return "Color: " + this._color;
        }
    }

    var circle = shape.extend({
        init: function init(centerX, centerY, radius, color) {
            this._super.init(color);
            this._centerX = centerX;
            this._centerY = centerY;
            this._radius = radius;
        },
        toString: function () {
            var result = "Circle: ";
            result += "O(" + this._centerX + ", " + this._centerY + "), ";
            result += "Radius: " + this._radius + ", ";
            result += this._super.toString();

            return result;
        }
    });

    var rectangle = shape.extend({
        init: function init(topLeftX, topLeftY, width, height, color) {
            this._super.init(color);
            this._topLeftX = topLeftX;
            this._topleftY = topLeftY;
            this._width = width;
            this._height = height;
        },
        toString: function () {
            var result = "Rectangle: ";
            result += "Top-Left(" + this._topLeftX + ", " + this._topleftY + "), ";
            result += "Width: " + this._width + ", ";
            result += "Height: " + this._height + ", ";
            result += this._super.toString();

            return result;
        }
    });

    var triangle = shape.extend({
        init: function init(aX, aY, bX, bY, cX, cY, color) {
            this._super.init(color);
            this._aX = aX;
            this._aY = aY;
            this._bX = bX;
            this._bY = bY;
            this._cX = cX;
            this._cY = cY;
        },
        toString: function () {
            var result = "Triangle: ";
            result += "A(" + this._aX + ", " + this._aY + "), ";
            result += "B(" + this._bX + ", " + this._bY + "), ";
            result += "C(" + this._cX + ", " + this._cY + "), ";
            result += this._super.toString();

            return result;
        }
    });

    var line = shape.extend({
        init: function (aX, aY, bX, bY, color) {
            this._super.init(color);
            this._aX = aX;
            this._aY = aY;
            this._bX = bX;
            this._bY = bY;
        },
        toString: function () {
            var result = "Line: ";
            result += "A(" + this._aX + ", " + this._aY + "), ";
            result += "B(" + this._bX + ", " + this._bY + "), ";
            result += this._super.toString();

            return result;
        }
    });

    var segment = line.extend({
        init: function (aX, aY, bX, bY, color) {
            this._super.init(aX, aY, bX, bY, color);
        },
        toString: function () {
            var result = "Segment: ";
            result += "A(" + this._aX + ", " + this._aY + "), ";
            result += "B(" + this._bX + ", " + this._bY + "), ";
            result += this._super._super.toString();

            return result;
        }
    });

    return {
        circle: circle,
        rectangle: rectangle,
        triangle: triangle,
        line: line,
        segment: segment
    }
})();

var circle = Object.create(shapesModule.circle);
circle.init(0, 0, 15, "AAA");
console.log(circle.toString());

var rect = Object.create(shapesModule.rectangle);
rect.init(0, 0, 15, 10, "BBB");
console.log(rect.toString());

var triangle = Object.create(shapesModule.triangle);
triangle.init(0, 0, 1, 1, 5, 10, "CCC");
console.log(triangle.toString());

var line = Object.create(shapesModule.line);
line.init(0, 0, 3, 5, "DDD");
console.log(line.toString());

var segment = Object.create(shapesModule.segment);
segment.init(1, 1, 10, 20, "EEE");
console.log(segment.toString());

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