public DrawingTracker(ITrackable drawing, TrackingContext context, TrackerParameters parameters)
{
this.drawing = drawing;
this.drawingId = drawing.Id;
this.parameters = parameters;
foreach (KeyValuePair <string, PointF> pair in drawing.GetTrackablePoints())
{
trackablePoints.Add(pair.Key, new TrackablePoint(context, parameters, pair.Value));
}
drawing.TrackablePointMoved += drawing_TrackablePointMoved;
assigned = true;
}