// CSE 341, Autumn 2010, Marty Stepp
// lecture code about JavaScript objects, prototypes, and inheritance

// a "constructor"
function Point(xx, yy) {
	this.x = xx;
	this.y = yy;
}

Point.prototype.distanceFromOrigin = function() {
	return Math.sqrt(this.x * this.x + this.y * this.y);
};

Point.prototype.toString = function() {
	return "(" + this.x + ", " + this.y + ")";
};

function Point3D(xx, yy, zz) {
	this.x = xx;
	this.y = yy;
	this.z = zz;
}

Point3D.prototype = new Point();   // extends Point

Point3D.prototype.distanceFromOrigin = function() {
	return Math.sqrt(this.x*this.x + this.y*this.y + this.z*this.z);
};

Point3D.prototype.toString = function() {
	return "(" + this.x + ", " + this.y + ", " + this.z + ")";
};

var p1 = new Point(4, 7);
var p2 = new Point(8, 19);
var p3d = new Point3D(1, 2, 3);




/*  Rhino interactions


Rhino 1.7 release 2 2010 01 20
js> load("lecture26.js");
js> p1
(4, 7)
js> p2
(8, 19)
js> function f() { print(this); }
js> f();
[object global]
js> var o = {};
js> o.foo = f;

function f() {
    print(this);
}

js> o.foo();
[object Object]
js> f();
[object global]
js> new f()
[object Object]
[object Object]
js> var p3 = Point(7, 16);    
js> p3
js> typeof(p3)
undefined
js> x
7
js> y
16
js> distanceFromOrigin

function () {
    return Math.sqrt(this.x * this.x + this.y * this.y);
}

js> distanceFromOrigin()
17.46424919657298
js> var o1 = {a:1, b:2, f:function() { return 42; }};
js> var o2 = {c:3, g:function() { return 99; }};
js> o2.prototype = o1;
[object Object]
js> o2.f
js> o2.f()
js: "<stdin>", line 23: uncaught JavaScript runtime exception: TypeError: Cannot find function f in object [object Object].
	at <stdin>:23

js> o2.prototype = {a:1, b:2, f:function() { return 42; }};
[object Object]
js> o2.f()                                                 
js: "<stdin>", line 25: uncaught JavaScript runtime exception: TypeError: Cannot find function f in object [object Object].
	at <stdin>:25

js> function foo() {}
js> foo.prototype
[object Object]
js> Point

function Point(xx, yy) {
    this.x = xx;
    this.y = yy;
    this.distanceFromOrigin = function () {
        return Math.sqrt(this.x * this.x + this.y * this.y);
    };
    this.toString = function () {
        return "(" + this.x + ", " + this.y + ")";
    };
}

js> Point.prototype
[object Object]
js> Point.prototype.booyah = function() { print("booyah!"); }

function () {
    print("booyah!");
}

js> var p4 = new Point(99, 44);
js> p4.booyah();
booyah!
js> 
stepp@stepp-thinkpad:~/341/lectures/files$ rhino
Rhino 1.7 release 2 2010 01 20
js> p1        
js: "<stdin>", line 2: uncaught JavaScript runtime exception: ReferenceError: "p1" is not defined.
	at <stdin>:2

js> load("lecture26.js");
js> p1
(4, 7)
js> p2
(8, 19)
js> p1.toString

function () {
    return "(" + this.x + ", " + this.y + ")";
}

js> p1.distanceFromOrigin

function () {
    return Math.sqrt(this.x * this.x + this.y * this.y);
}

js> p1.distanceFromOrigin()
8.06225774829855
js> 
stepp@stepp-thinkpad:~/341/lectures/files$ rhino
Rhino 1.7 release 2 2010 01 20
js> load("lecture26.js");
js> p1
(99999, -11111)
js> p2
(99999, -11111)
js> p1.distanceFromOrigin()
100614.38426984484
js> p1.x = 2;
2
js> p1.y = 4;
4
js> p2
(99999, -11111)
js> p1
(2, 4)
js> var s = "hello";
js> s.toUpperCase()
HELLO
js> String.prototype

js> String.prototype.toUpperCase 
function toUpperCase() { [native code for String.toUpperCase, arity=0] }

js> String.prototype.toUpperCase = null;
null
js> s.toUpperCase()                     
js: "<stdin>", line 15: uncaught JavaScript runtime exception: TypeError: Cannot call property toUpperCase in object hello. It is not a function, it is "object".
	at <stdin>:15

js> Point

function Point(xx, yy) {
}

js> Point.abc = 123;
123
js> Point.toString()

function Point(xx, yy) {
}

js> Function.prototype
function () {
	[native code, arity=0]
}

js> Function.prototype.booyah = function() { print("booyah!"); }

function () {
    print("booyah!");
}

js> Point

function Point(xx, yy) {
}

js> Point.booyah()
booyah!
js> p1.booyah()
js: "<stdin>", line 23: uncaught JavaScript runtime exception: TypeError: Cannot find function booyah in object (2, 4).
	at <stdin>:23

js> Object.prototype.toString = function() { return "AAAAASSSSSSS"; }

function () {
    return "AAAAASSSSSSS";
}

js> var o = {};
js> o
AAAAASSSSSSS
js> var o = {toString: function() { return "hi"; };
js: "<stdin>", line 27: missing } after property list
js: var o = {toString: function() { return "hi"; };
js: ..............................................^
js> var o = {toString: function() { return "hi"; }};
js> o
hi
js> 
stepp@stepp-thinkpad:~/341/lectures/files$ rhino
Rhino 1.7 release 2 2010 01 20
js> load("lecture26.js");
js> p3d
(1, 2)
js> p3d.distanceFromOrigin

function () {
    return Math.sqrt(this.x * this.x + this.y * this.y);
}

js> 

*/