Method update

tests/cpp-tests/Source/ParallaxTest/ParallaxTest.cpp:191–241

}

void Issue2572::update(float dt)
{
    _addTimer += dt;
    _moveTimer += dt;
    if (_moveTimer >= _wholeMoveTime)
    {
        this->unscheduleUpdate();
        return;
    }

    _paraNode->setPosition(_paraNode->getPosition() + _wholeMoveSize * dt / _wholeMoveTime);

    if (_addTimer >= _addChildStep)
    {
        _addTimer = 0.0f;

        auto child    = Sprite::create("Images/Icon.png");
        Size viewSize = Director::getInstance()->getVisibleSize();
        Vec2 offset   = Vec2(viewSize.width / 2, viewSize.height / 2);
        _paraNode->addChild(child, 1, Vec2(1, 0), offset);

        _childList.pushBack(child);
    }

    // After a child added, output the position of the children 3 times.
    // Bug : The first output is much different with the second one & the third one.
    if (_childList.size() != _preListSize)
    {
        switch (_printCount)
        {
        case 0:
        case 1:
        case 2:
            AXLOGD("--child count-- {}", _childList.size());
            for (const auto& obj : _childList)
            {
                Sprite* obstacle = dynamic_cast<Sprite*>(obj);
                AXLOGD("child position : ({:.2}, {:.2})", obstacle->getPositionX(), obstacle->getPositionY());
            }
            AXLOGD("-------------------");
            _printCount++;
            break;
        case 3:
            _preListSize = _childList.size();
            _printCount  = 0;
            break;
        default:
            break;
        }
    }
}

std::string Issue2572::title() const
{