protected virtual void SkeletonDataChange(SkeletonDataChangeEventArgs e)
{
if (SkeletonDataChanged != null)
{
SkeletonDataChanged(this, e);
}
}
// Event Handler for SkeletonFrameReady events
// (A new frame of SkeletonStream data is available)
private void KinectSkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e)
{
// Initialize/empty the skeletonStreamData array
this.skeletonStreamData = new Skeleton[0];
// Get the current SkeletonFrame and copy out the data
using (SkeletonFrame skeletonFrame = e.OpenSkeletonFrame())
{
if (skeletonFrame != null)
{
try
{
// Get the Skeleton data from the SkeletonFrame
skeletonStreamData = new Skeleton[skeletonFrame.SkeletonArrayLength];
skeletonFrame.CopySkeletonDataTo(skeletonStreamData);
// Dispatch the SkeletonDataChange event
SkeletonDataChangeEventArgs s = new SkeletonDataChangeEventArgs(skeletonStreamData);
SkeletonDataChange(s);
}
catch (NullReferenceException ex)
{
Console.WriteLine(ex.TargetSite + " - " + ex.Message);
}
}
}
// Create the Skeleton image output
using (DrawingContext dc = this.drawingGroup.Open())
{
// Draw a black background the size of our render
dc.DrawRectangle(backgroundBrush, null, new Rect(0, 0, RenderWidth, RenderHeight));
//Draw each Skeleton
if (skeletonStreamData.Length != 0)
{
foreach (Skeleton skeleton in skeletonStreamData)
{
// TO-DO: Render clipped edges
if (skeleton.TrackingState == SkeletonTrackingState.Tracked)
{
DrawSkeletonBonesAndJoints(dc, skeleton.Joints);
}
else if (skeleton.TrackingState == SkeletonTrackingState.PositionOnly)
{
DrawSkeletonPosition(dc, skeleton.Position);
}
}
}
// Prevent any drawing outside the render area
this.drawingGroup.ClipGeometry = new RectangleGeometry(new Rect(0, 0, RenderWidth, RenderHeight));
}
}
// Event handler for KinectHelper.SkeletonDataChanged event
// Used to get the positions of the user's hands and control the theremin
private void SkeletonDataChange(object o, SkeletonDataChangeEventArgs e)
{
// Get the primary skeleton (the first one being tracked)
Skeleton skel = null;
for (int i = 0; i < e.skeletons.Length; i++)
{
if (e.skeletons[i].TrackingState == SkeletonTrackingState.Tracked)
{
skel = e.skeletons[i];
break;
}
}
// If no skeletons found, no need to continue
if (skel == null)
return;
// Get the left and right hand positions from the skeleton
Point freqHandPos = _helper.SkeletonPointToScreen(skel.Joints[_freqHand].Position);
Point ampHandPos = _helper.SkeletonPointToScreen(skel.Joints[_ampHand].Position);
// Determine the frequency based on the position of the right hand
double freqValue = 1 - freqHandPos.Y / skeletonImage.Height;
float customFreq;
// If guides are enabled, determine the exact chromatic note to play
if (_enableGuides)
customFreq = GetChromaticNoteFrequency(freqValue);
// If not, determine the frequency based on the exact position
else
customFreq = LinearToLog(freqValue);
// Determine the amplitude based on the position of the left hand
double ampValue = 1 - ampHandPos.Y / skeletonImage.Height;
float customAmp = (float) ampValue;
// Update the wave
if (_player.IsPlaying())
{
_player.Frequency = customFreq;
freqLabel.Content = customFreq;
_player.Amplitude = customAmp;
ampLabel.Content = customAmp;
}
}
