GameLib.D3.Vector2 = function(x, y) {

    this.x = 0;
    this.y = 0;

    if (x) {
        this.x = x;
    }

    if (y) {
        this.y = y;
    }
};

GameLib.D3.Vector2.prototype.copy = function() {
    return new GameLib.D3.Vector2(
        this.x,
        this.y
    );
};

GameLib.D3.Vector2.prototype.equals = function(v) {
    return !!(((this.x == v.x) &&
    (this.y == v.y)) ||
    ((this.y == v.x) &&
    (this.x == v.y)));
};