Method constructor

examples/extern/gmath.bundle.js:674–683

(x, y)

        return new Vector2(1, 0);
    }
    constructor(x, y){
        if (x !== undefined) {
            this.x = x;
            if (y !== undefined) {
                this.y = y;
            } else {
                this.y = x;
            }
        }
    }
    clone() {
        return new Vector2(this.x, this.y);
    }