/// <summary>
/// Refresh the UI at a fixed period specified by the timer
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void UpdateUITimer_Tick(object sender, EventArgs e)
{
m_UIUpdateTimer.Stop();
double interframeDuration = m_UIUpdateTimer.Duration();
QueryPerfCounter uiIntraFrameTimer = new QueryPerfCounter();
uiIntraFrameTimer.Start();
// the frame queue is a shared resource with the FrameOfMocap delivery thread, so lock it while reading
// note this can block the frame delivery thread. In a production application frame queue management would be optimized.
lock (syncLock)
{
while (m_FrameQueue.Count > 0)
{
m_FrameOfData = m_FrameQueue.Dequeue();
if (m_FrameQueue.Count > 0)
{
continue;
}
if (m_FrameOfData != null)
{
// for servers that only use timestamps, not frame numbers, calculate a
// frame number from the time delta between frames
if (desc.HostApp.Contains("TrackingTools"))
{
m_fCurrentMocapFrameTimestamp = m_FrameOfData.fLatency;
if (m_fCurrentMocapFrameTimestamp == m_fLastFrameTimestamp)
{
continue;
}
if (m_fFirstMocapFrameTimestamp == 0.0f)
{
m_fFirstMocapFrameTimestamp = m_fCurrentMocapFrameTimestamp;
}
m_FrameOfData.iFrame = (int)((m_fCurrentMocapFrameTimestamp - m_fFirstMocapFrameTimestamp) * m_ServerFramerate);
}
// update the data grid
UpdateDataGrid();
// update the chart
UpdateChart(m_FrameOfData.iFrame);
// only redraw chart when necessary, not for every frame
if (m_FrameQueue.Count == 0)
{
chart1.ChartAreas[0].RecalculateAxesScale();
chart1.ChartAreas[0].AxisX.Minimum = 0;
chart1.ChartAreas[0].AxisX.Maximum = GraphFrames;
chart1.Invalidate();
}
// Mocap server timestamp (in seconds)
m_fLastFrameTimestamp = m_FrameOfData.fTimestamp;
TimestampValue.Text = m_FrameOfData.fTimestamp.ToString("F3");
// SMPTE timecode (if timecode generator present)
int hour, minute, second, frame, subframe;
bool bSuccess = m_NatNet.DecodeTimecode(m_FrameOfData.Timecode, m_FrameOfData.TimecodeSubframe, out hour, out minute, out second, out frame, out subframe);
if (bSuccess)
{
TimecodeValue.Text = string.Format("{0:D2}:{1:D2}:{2:D2}:{3:D2}.{4:D2}", hour, minute, second, frame, subframe);
}
if (m_FrameOfData.bRecording)
{
chart1.BackColor = Color.Red;
}
else
{
chart1.BackColor = Color.White;
}
}
}
}
uiIntraFrameTimer.Stop();
double uiIntraFrameDuration = uiIntraFrameTimer.Duration();
m_UIUpdateTimer.Start();
}