Method showStats

core/base/Director.cpp:1269–1319

display the FPS using a LabelAtlas updates the FPS every frame

// display the FPS using a LabelAtlas
// updates the FPS every frame
void Director::showStats()
{
    if (_isStatusLabelUpdated)
    {
        createStatsLabel();
        _isStatusLabelUpdated = false;
    }

    static uint32_t prevCalls = 0;
    static uint32_t prevVerts = 0;

    ++_frames;
    _accumDt += _deltaTime;

    if (_statsDisplay && _FPSLabel && _drawnBatchesLabel && _drawnVerticesLabel)
    {
        char buffer[30];

        // Probably we don't need this anymore since
        // the framerate is using a low-pass filter
        // to make the FPS stable
        if (_accumDt > AX_DIRECTOR_STATS_INTERVAL)
        {
            auto msg = fmt::format_to_z(buffer, "{:.1f} / {:.3f}", _frames / _accumDt, _secondsPerFrame);
            _FPSLabel->setString(msg);
            _accumDt = 0;
            _frames  = 0;
        }

        auto currentCalls = (uint32_t)_renderer->getDrawnBatches();
        auto currentVerts = (uint32_t)_renderer->getDrawnVertices();
        if (currentCalls != prevCalls)
        {
            auto msg = fmt::format_to_z(buffer, "GL calls:{:6d}", currentCalls);
            _drawnBatchesLabel->setString(msg);
            prevCalls = currentCalls;
        }

        if (currentVerts != prevVerts)
        {
            auto msg = fmt::format_to_z(buffer, "GL verts:{:6d}", currentVerts);
            _drawnVerticesLabel->setString(msg);
            prevVerts = currentVerts;
        }

        const Mat4& identity = Mat4::IDENTITY;
        _drawnVerticesLabel->visit(_renderer, identity, 0);
        _drawnBatchesLabel->visit(_renderer, identity, 0);
        _FPSLabel->visit(_renderer, identity, 0);
    }
}

void Director::calculateMPF()
{