Method constructor

docs/app/js/sanddance-app.js:70201–70214

(x = 0, y = 0, z = 0)

        return ZERO;
    }
    constructor(x = 0, y = 0, z = 0){
        super(-0, -0, -0);
        if (arguments.length === 1 && (0, _common.isArray)(x)) this.copy(x);
        else {
            if ((0, _common.config).debug) {
                (0, _validators.checkNumber)(x);
                (0, _validators.checkNumber)(y);
                (0, _validators.checkNumber)(z);
            }
            this[0] = x;
            this[1] = y;
            this[2] = z;
        }
    }
    set(x, y, z) {
        this[0] = x;
        this[1] = y;