Method update

tests/cpp-tests/Source/ParticleTest/ParticleTest.cpp:741–748

}

void DemoTimeScale::update(float dt)
{
    auto p = (ParticleSystem*)getChildByTag(2);

    elapsedTime += Director::getInstance()->getDeltaTime();
    auto scale = (sin(elapsedTime * 4) + 1.0F) / 2.0F;
    p->setTimeScale(scale);
}

//------------------------------------------------------------------
//