cluster item script for delay, interval, cancel.

delay_interval.js

const cid = () => Math.floor(Math.random() * 1e4);

const delay = (t, f, a) => {
    let i = cid();
    let l = $.state.l ?? [];
    l.push([i, t, f.name, a]);
    $.state.l = l;
    return i;
};

const interval = (t, f, a) => {
    let i = cid();
    let l = $.state.l ?? [];
    l.push([i, t, f.name, a, t]);
    $.state.l = l;
    return i;
};

const cancel = i => {
    let lc = $.state.lc ?? [];
    lc.push(i);
    $.state.lc = lc;
};

const tick = t => {
    let l = $.state.l;
    if (!l) return;
    let lc = $.state.lc;
    $.state.l = [];
    $.state.lc = null;
    l.forEach(c => {
        if (lc && lc.indexOf(c[0]) >= 0) {
            c[1] = -1;
        } else if ((c[1] > 0) && (c[1] -= t, c[1] <= 0)) {
            if (c.length > 4) c[1] = c[4];
            try { this[c[2]](c[3]) }
            catch { c[1] = -1 }
        }
    });

    $.state.l = l.filter(c => c[1] > 0).concat($.state.l);
};

$.onUpdate(t => {
    tick(t);
});

$.onInteract(p => {
    cancel($.state.i);
    cancel($.state.j);
    $.state.p = p;
    $.state.i = interval(0.5, foo, 2);
    $.state.j = delay(4, bar);
});

// use not 'const foo() =>{}' but 'function' to call it by 'this["foo"]()'
function foo(v) {
    $.state.p.addVelocity(new Vector3(0, v, 0));
};

function bar() {
    delay(0.5, foo, 10);
    cancel($.state.i);
}