private IList<FingerPoint> MapFingerPoints(IList<FingerPoint> oldFingerPoints, IList<FingerPoint> newFingerPoints)
{
var idGenerator = new IdGenerator();
var distanceMap = new DistanceMap<FingerPoint, FingerPoint>(oldFingerPoints);
distanceMap.Map(newFingerPoints);
foreach (var tuple in distanceMap.MappedItems)
{
idGenerator.SetUsed(tuple.Item1.Id);
tuple.Item2.Id = tuple.Item1.Id;
tuple.Item2.FrameCount = tuple.Item1.FrameCount + 1;
}
foreach (var newFinger in distanceMap.UnmappedItems)
{
newFinger.Id = idGenerator.GetNextId();
}
foreach (var discontinuedFinger in distanceMap.DiscontinuedItems)
{
discontinuedFinger.NegativeFrameCount++;
}
return distanceMap.MappedItems.Select(i => i.Item2)
.Union(distanceMap.UnmappedItems)
.Union(distanceMap.DiscontinuedItems)
.Where(i => i.NegativeFrameCount <= this.settings.FramesForDiscontinuedFingerPoint).ToList();
}