C++学习（三一三）EventQueue创建时机

Posted 2021-08-15 hankern

osgGA::EventQueue

在osgViewer::View创建时创建。

osgViewer/View.cpp
View::View():
    _fusionDistanceMode(osgUtil::SceneView::PROPORTIONAL_TO_SCREEN_DISTANCE),
    _fusionDistanceValue(1.0f)
{
    // OSG_NOTICE<<"Constructing osgViewer::View"<<std::endl;

    _startTick = 0;

    _frameStamp = new osg::FrameStamp;
    _frameStamp->setFrameNumber(0);
    _frameStamp->setReferenceTime(0);
    _frameStamp->setSimulationTime(0);

    _scene = new Scene;

    // make sure View is safe to reference multi-threaded.
    setThreadSafeRefUnref(true);

    // need to attach a Renderer to the master camera which has been default constructed
    getCamera()->setRenderer(createRenderer(getCamera()));

    setEventQueue(new osgGA::EventQueue);

    setStats(new osg::Stats("View"));
}