public Cluster(TouchInput point)
{
this.AddPoint(point.Id);
this.Hash = "#" + point.Id;
this.Centroid = point.Position;
_state = ClusterState.Invalid;
}
public bool Equals(TouchInput other)
{
if (this.Position.x == other.Position.x || this.Position.y == other.Position.y)
return true;
else
return false;
}
public bool Equals(TouchInput other, float pxThreshold)
{
float dist = Vector2.Distance(this.Position, other.Position);
if (dist <= pxThreshold)
return true;
else
return false;
}
internal static void AddFingerTouch(TouchInput t)
{
FingerTouch finger;
if(_touches.TryGetValue(t.Id, out finger))
{
finger.Update(t);
_touches[t.Id] = finger;
}
else
_touches[t.Id] = new FingerTouch(t);
}
public Cluster AddPoint(int touchId)
{
TouchInput touch = new TouchInput(touchId, InternalTouches.List[touchId].Position, InternalTouches.List[touchId].State);
_pointsIds.Add(touchId);
_points.Add(touchId, touch);
UpdateCentroid();
this.Hash = ClusterUtils.GetPointsHash(_pointsIds.ToArray<int>());
if (_pointsIds.Count == 4)
this._state = ClusterState.Unidentified;
else if (_pointsIds.Count > 4)
this._state = ClusterState.Invalid;
return this;
}
/// <summary>
/// Given an array of TouchInputs finds the two furthes apart
/// </summary>
/// <param name="points">Array of TouchInputs</param>
/// <returns>The two furthest TouchInputs indexes</returns>
private int[] FindTwoFurthestPoints(TouchInput[] points)
{
int[] result = new int[2];
float maxDist = 0.0f;
float currentDist = 0.0f;
for(int i=0; i < points.Length; i++)
{
for(int j=i+1; j < points.Length; j++)
{
currentDist = Vector2.Distance(points[i].Position, points[j].Position);
if(currentDist > maxDist)
{
//Found new max
maxDist = currentDist;
result[0] = points[i].Id;
result[1] = points[j].Id;
}
}
}
return result;
}
internal void Update(TouchInput t)
{
this._id = t.Id;
this._position = t.Position;
this._state = t.State;
}
internal FingerTouch(TouchInput t)
{
this._id = t.Id;
this._position = t.Position;
this._state = t.State;
}
public Cluster[] UpdatePoint(int touchId)
{
Cluster newCluster;
if (Vector2.Distance(this.Centroid, InternalTouches.List[touchId].Position) < ClusterManager.Instance.ClusterDistThreshold)
{
//Point still in clustrer
_points[touchId] = new TouchInput(touchId, InternalTouches.List[touchId].Position, TouchState.Moved);
newCluster = null;
if (State == ClusterState.Identidied)
_state = ClusterState.Updated;
}
else
{
//Point has moved out of the cluster
//Handle current Cluster
//If it was just one point then we must cancel the cluster!!!!!!
// if (_pointsIds.Count != 1)
// {
_pointsIds.Remove(touchId);
_points.Remove(touchId);
if (_state == ClusterState.Identidied || _state == ClusterState.Updated)
{
_state = ClusterState.Cancelled;
_cancelledHash = this.Hash;
_cancelledPointsIds.Add(touchId);
}
else if (State == ClusterState.Cancelled)
_cancelledPointsIds.Add(touchId);
else if (_pointsIds.Count == 4)
_state = ClusterState.Unidentified;
else
_state = ClusterState.Invalid;
//Update new Hash
this.Hash = ClusterUtils.GetPointsHash(_pointsIds.ToArray<int>());
// }
// else
newCluster = new Cluster(InternalTouches.List[touchId]);
}
UpdateCentroid();
return new Cluster[] { this ,newCluster };
}
