C++ Viewer::getViewerStats方法代码示例

/// Utility function you call before something you want to time, so that the 
/// recorded times will all be consistent using the viewer's time.
void startTiming(osgViewer::Viewer& viewer, const std::string& name)
{
    osg::Timer_t tick = osg::Timer::instance()->tick();
    double currentTime = osg::Timer::instance()->delta_s(viewer.getStartTick(), tick);
    int framenumber = viewer.getFrameStamp()->getFrameNumber();

    viewer.getViewerStats()->setAttribute(framenumber, name + " begin", currentTime);
}

/// Utility function you call after something you want to time, so that the 
/// recorded times will all be consistent using the viewer's time.
void endTiming(osgViewer::Viewer& viewer, const std::string& name)
{
    osg::Timer_t tick = osg::Timer::instance()->tick();
    double currentTime = osg::Timer::instance()->delta_s(viewer.getStartTick(), tick);
    int framenumber = viewer.getFrameStamp()->getFrameNumber();

    viewer.getViewerStats()->setAttribute(framenumber, name + " end", currentTime);

    double begin = 0.0;
    double elapsed = 0.0;
    if (viewer.getViewerStats()->getAttribute(framenumber, name + " begin", begin))
    {
        elapsed = currentTime - begin;
    }

    viewer.getViewerStats()->setAttribute(framenumber, name + " time taken", elapsed);
}

void updateUserStats(osgViewer::Viewer& viewer)
{
    // Test the custom stats line by just adding up the update and cull 
    // times for the viewer main camera for the previous frame.
    if (viewer.getViewerStats()->collectStats("update") && viewer.getCamera()->getStats()->collectStats("rendering"))
    {
        // First get the frame number. The code below assumes that 
        // updateUserStats() is called after advance(), so the frame number
        // that will be returned is for the frame that has just started and is
        // not rendered yet. The previous frame is framenumber-1, but we can't
        // use that frame's timings because it's probably not finished 
        // rendering yet (in multithreaded viewer modes). So we'll use the
        // timings for framenumber-2 for this demo.
        int framenumber = viewer.getFrameStamp()->getFrameNumber();

        // Get the update time and the viewer main camera's cull time. We use 
        // getAveragedAttribute() in order to get the actual time elapsed as 
        // calculated by the stats.
        double update = 0.0, cull = 0.0;
        viewer.getViewerStats()->getAveragedAttribute("Update traversal time taken", update);
        viewer.getCamera()->getStats()->getAveragedAttribute("Cull traversal time taken", cull);

        // Get various begin and end times, note these are not elapsed times 
        // in a frame but rather the simulation time at those moments.
        double eventBegin = 0.0, updateBegin = 0.0, cullEnd = 0.0, drawEnd = 0.0;
        viewer.getViewerStats()->getAttribute(framenumber-2, "Event traversal begin time", eventBegin);
        viewer.getViewerStats()->getAttribute(framenumber-2, "Update traversal begin time", updateBegin);
        viewer.getCamera()->getStats()->getAttribute(framenumber-2, "Cull traversal end time", cullEnd);
        viewer.getCamera()->getStats()->getAttribute(framenumber-2, "Draw traversal end time", drawEnd);

        // This line displays the frame number. It's not averaged, just displayed as is.
        viewer.getViewerStats()->setAttribute(framenumber, frameNumberName, framenumber);

        // This line displays the frame time (from beginning of event to end of draw). No bars.
        viewer.getViewerStats()->setAttribute(framenumber-1, frameTimeName, drawEnd - eventBegin);

        // This line displays the sum of update and main camera cull times.
        viewer.getViewerStats()->setAttribute(framenumber-1, customTimeName + " time taken", update+cull);
        // Since we give begin and end times that correspond to the begin of 
        // the update phase and the end of the cull phase, the bar in the 
        // graph will not correspond to the summed times above if something 
        // happened between update and cull (as in this demo). Also, we need 
        // to translate the updateBegin and cullEnd times by one frame since 
        // we're taking the times for framenumber-2 but using them to display
        // in the framenumber-1 graph.
        viewer.getViewerStats()->setAttribute(framenumber-1, customTimeName + " begin", updateBegin + (1.0/60.0));
        viewer.getViewerStats()->setAttribute(framenumber-1, customTimeName + " end", cullEnd + (1.0/60.0));
    }
}

int Metrics::run(osgViewer::Viewer& viewer)
{
    if (Metrics::enabled())
    {
        if (!viewer.isRealized())
        {
            viewer.realize();
        }

        // If Metrics are enabled, enable stats on the Viewer so that it we can report them for the Metrics
        if (Metrics::enabled())
        {
            osgViewer::ViewerBase::Scenes scenes;
            viewer.getScenes(scenes);
            for (osgViewer::ViewerBase::Scenes::iterator itr = scenes.begin();
                itr != scenes.end();
                ++itr)
            {
                osgViewer::Scene* scene = *itr;
                osgDB::DatabasePager* dp = scene->getDatabasePager();
                if (dp && dp->isRunning())
                {
                    dp->resetStats();
                }
            }

            viewer.getViewerStats()->collectStats("frame_rate", true);
            viewer.getViewerStats()->collectStats("event", true);
            viewer.getViewerStats()->collectStats("update", true);

            viewer.getCamera()->getStats()->collectStats("rendering", true);
            viewer.getCamera()->getStats()->collectStats("gpu", true);
        }

        // Report memory and fps every 10 frames.
        unsigned int reportEvery = 10;

        while (!viewer.done())
        {
            {
                METRIC_SCOPED_EX("frame", 1, "number", toString<int>(viewer.getFrameStamp()->getFrameNumber()).c_str());
                {
                    METRIC_SCOPED("advance");
                    viewer.advance();
                }

                {
                    METRIC_SCOPED("event");
                    viewer.eventTraversal();
                }

                {
                    METRIC_SCOPED("update");
                    viewer.updateTraversal();
                }

                {
                    METRIC_SCOPED("render");
                    viewer.renderingTraversals();
                }

            }

            // Report memory and fps periodically. periodically.
            if (viewer.getFrameStamp()->getFrameNumber() % reportEvery == 0)
            {
                // Only report the metrics if they are enabled to avoid computing the memory.
                if (Metrics::enabled())
                {
                    Metrics::counter("Memory::WorkingSet", "WorkingSet", Memory::getProcessPhysicalUsage() / 1048576);
                    Metrics::counter("Memory::PrivateBytes", "PrivateBytes", Memory::getProcessPrivateUsage() / 1048576);
                    Metrics::counter("Memory::PeakPrivateBytes", "PeakPrivateBytes", Memory::getProcessPeakPrivateUsage() / 1048576);
                }
            }

            double eventTime = 0.0;
            if (viewer.getViewerStats()->getAttribute(viewer.getViewerStats()->getLatestFrameNumber(), "Event traversal time taken", eventTime))
            {
                Metrics::counter("Viewer::Event", "Event", eventTime * 1000.0);
            }

            double updateTime = 0.0;
            if (viewer.getViewerStats()->getAttribute(viewer.getViewerStats()->getLatestFrameNumber(), "Update traversal time taken", updateTime))
            {
                Metrics::counter("Viewer::Update", "Update", updateTime * 1000.0);
            }

            double cullTime = 0.0;
            if (viewer.getCamera()->getStats()->getAttribute(viewer.getCamera()->getStats()->getLatestFrameNumber(), "Cull traversal time taken", cullTime))
            {
                Metrics::counter("Viewer::Cull", "Cull", cullTime * 1000.0);
            }

            double drawTime = 0.0;
            if (viewer.getCamera()->getStats()->getAttribute(viewer.getCamera()->getStats()->getLatestFrameNumber(), "Draw traversal time taken", drawTime))
            {
                Metrics::counter("Viewer::Draw", "Draw", drawTime * 1000.0);
            }

            double gpuTime = 0.0;
//.........这里部分代码省略.........