public void Update(IEnumerable<BlobsTracker.TrackedBlob> updatedBlobs)
{
/* Rajouter les nouveaux blobs */
foreach(var item in updatedBlobs)
{
if(item != null && !currentBlobs.ContainsKey(item))
currentBlobs[item] = new BlobGestureFollower(item, 10, 10, TimeSpan.FromSeconds(2), TimeSpan.FromMilliseconds(200));
}
/* Retirer ceux qui sont morts, mettre à jour les autres */
var dedBlobs = new List<BlobsTracker.TrackedBlob>();
foreach (var tracked in currentBlobs)
{
tracked.Value.Update();
if (tracked.Value.State == Interaction.CursorState.Default)
{
/* Il est mort, jim ! */
dedBlobs.Add(tracked.Key);
}
else
{
/* On essaye les détections */
TryDetect(tracked.Value);
}
}
/* Ménage */
foreach (var ded in dedBlobs)
currentBlobs.Remove(ded);
}
private double ComputeGestureScore(DateTime now, BlobGestureFollower follower, RecognizedGesture desiredGesture)
{
var sequence = follower.Sequence;
if ((now - sequence.LastModificationTime) >= gestureDetectionLatency)
{
var machine = desiredGesture.Machine;
if (sequence.Count >= machine.Descriptor.Count)
{
machine.Reset();
for (int i = 0; i < sequence.Count && !machine.Valid; i++)
{
var gesture = sequence[sequence.Count - i - 1];
if (gesture != null)
{
machine.Update(gesture.Gesture);
}
}
return machine.Valid ? machine.Score : 0;
}
else
return 0;
}
else
return 0;
}
private void TryDetect(BlobGestureFollower follower)
{
if (follower == null)
throw new ArgumentNullException("follower");
var scoresForEachMoves =
from desiredGesture in recognizedGestures
select new { gesture = desiredGesture, score = ComputeGestureScore(DateTime.Now, follower, desiredGesture) };
var bestMatch =
(
from match in scoresForEachMoves
where match.score > 0
orderby match.score descending
select match.gesture
).FirstOrDefault();
if (bestMatch != null)
{
follower.Sequence.Reset();
bestMatch.RaiseActivated(follower.Blob);
}
}
