Method update

core/base/Scheduler.cpp:63–113

}

void Timer::update(float dt)
{
    if (_elapsed == -1)
    {
        _elapsed       = 0;
        _timesExecuted = 0;
        return;
    }

    // accumulate elapsed time
    _elapsed += dt;

    // deal with delay
    if (_useDelay)
    {
        if (_elapsed < _delay)
        {
            return;
        }
        _timesExecuted += 1;  // important to increment before call trigger
        trigger(_delay);
        _elapsed  = _elapsed - _delay;
        _useDelay = false;
        // after delay, the rest time should compare with interval
        if (isExhausted())
        {  // unschedule timer
            cancel();
            return;
        }
    }

    // if _interval == 0, should trigger once every frame
    float interval = (_interval > 0) ? _interval : _elapsed;
    while ((_elapsed >= interval) && !_aborted)
    {
        _timesExecuted += 1;  // important to increment before call trigger
        trigger(interval);
        _elapsed -= interval;

        if (isExhausted())
        {
            cancel();
            break;
        }

        if (_elapsed <= 0.f)
        {
            break;
        }
    }
}

bool Timer::isExhausted() const
{