Cocos2dx-3.5 中Camera的使用方法...求救

Cocos2d-x
#1

Camera* camera = Camera::createPerspective(60, float(visibleSize.width / visibleSize.height), 1, 200);
this->addChild(camera);
camera->setCameraFlag(CameraFlag::USER1);

this->setCameraMask((unsigned short)CameraFlag::USER1);

为什么这样添加后怎么对camera进行操作都没有改变?

求Camera的使用方法 …

#2 
    auto _camera = Camera::createPerspective(60, winSize.width / winSize.height, 1, 1000);
_camera->setCameraFlag(CameraFlag::USER1);
    _camera->setPosition3D(Vec3());
this->setCameraMask((unsigned short)CameraFlag::USER1);
_camera->lookAt(Vec3(0, 0, 0), Vec3::UNIT_Y);
this->addChild(_camera);