r3-legacy/src/game-lib-api-vector2.js

GameLib.D3.API.Vector2 = function Vector2(x, y) {
    this.x = x || 0;
    this.y = y || 0;
};

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